Battery pack locking device

Abstract

The battery pack locking device comprises a lock pin and a locking claw mechanism, the lock pin is used for being vertically and fixedly connected to the side face of a battery pack, the locking claw mechanism comprises a base, a locking claw, a sliding part and a linear driver, the base is used for being fixedly connected to the bottom of a battery bin, a mounting opening is formed in the base in a front-back penetrating mode, the locking claw is in an F shape, and the sliding part is connected with the linear driver. The rear end of the locking claw is provided with a clamping groove capable of being buckled on the lock pin downwards, the left side and the right side of the middle of the locking claw are rotationally connected with the sliding parts, the left side and the right side of the installation opening are provided with sliding grooves matched with the sliding parts, the sliding parts are connected into the sliding grooves in a sliding mode, and the rear ends of the sliding grooves incline downwards. The sliding part abuts against the rear end of the sliding groove, the linear driver has a self-locking function and is fixedly connected to the front side of the base, and an output shaft of the linear driver extends backwards and is hinged to the front end of the locking claw. The utility model provides a battery pack locking device. The locking firmness of a battery pack is improved.

Description

Technical Field

[0001] This utility model relates to the field of heavy-duty truck battery swapping technology, and in particular to a battery pack locking device. Background Technology

[0002] As shown in patent application number CN202420159933.4, the charging rack for a side-loading battery-swapping heavy-duty truck consists of a welded frame, quick-connect charging connectors, and pneumatic locks. The welded frame is fixed to the left and right sides of the heavy-duty truck via a back plate, forming a battery compartment within the frame. Multiple unpowered rollers are installed at the bottom of the welded frame to facilitate the entry and exit of the battery pack. The quick-connect charging connectors and pneumatic locks are mounted on the back plate of the welded frame. The battery pack has a positioning pin and a charging interface on its front side, with the positioning pins corresponding to the pneumatic locks and the charging interface corresponding to the quick-connect charging connectors. During charging, the battery pack enters the battery compartment via the unpowered rollers, the quick-connect charging head is inserted into the charging interface to establish electrical connection, and the positioning pins are inserted into the pneumatic locks, which lock the positioning pins to prevent the battery pack from leaving the battery compartment while the heavy-duty truck is in motion.

[0003] The existing charging rack locks the battery pack by using a pneumatic lock and a positioning pin. The pneumatic lock and the positioning pin are connected by a plug-in connection. Since the plug-in direction of the positioning pin and the pneumatic lock is the same as the direction of movement of the battery pack, and the existing pneumatic lock generally locks the positioning pin by clamping, when the pneumatic lock malfunctions and releases the positioning pin, the positioning pin can easily be pulled out of the pneumatic lock, causing the battery pack to fall out of the battery compartment. Utility Model Content

[0004] In order to solve the above-mentioned defects of existing positioning pins and pneumatic locks for locking battery packs, this utility model proposes a battery pack locking device to improve the reliability of battery pack locking.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A battery pack locking device includes a locking pin and a locking claw mechanism. The locking pin is vertically fixed to the side of the battery pack. The locking claw mechanism includes a base, a locking claw, a sliding part, and a linear actuator. The base is fixedly connected to the bottom of the battery compartment. An installation port is provided through the front and rear of the base. The locking claw is F-shaped and extends through the installation port. A slot is provided at the rear end of the locking claw to engage with the locking pin. The sliding part is rotatably connected to the left and right sides of the middle of the locking claw. Slide grooves adapted to the sliding parts are provided on both sides of the installation port. The sliding parts are slidably connected in the slide grooves. The rear end of the slide grooves is inclined downward. When the slots engage with the locking pin, the sliding parts abut against the rear end of the slide grooves. The linear actuator has a self-locking function and is fixedly connected to the front side of the base. The output axis of the linear actuator extends rearward and is hinged to the front end of the locking claw.

[0007] With the above settings, firstly, the locking claw is connected to the locking pin by a hook connection, so the locking claw will not disengage from the locking pin when the linear actuator is not in operation, making the locking effect more reliable; secondly, reducing the number of parts that need to be inserted on the front side of the battery pack can reduce the battery pack insertion accuracy and make the battery pack easier to install into the battery compartment.

[0008] Furthermore, the locking pawl mechanism also includes a rotating shaft that extends laterally through the locking pawl and is fixedly connected to it. The sliding part is configured as a bearing, which is rotatably connected to the end of the rotating shaft. The outer diameter of the bearing is equal to the width of the groove.

[0009] With the above settings, firstly, the bearing is rotatably connected to the locking pawl via a rotating shaft; secondly, the rotational resistance between the bearing and the rotating shaft is reduced, allowing the bearing to rotate within the slide groove, thereby reducing the friction between the bearing and the slide groove; thirdly, when the outer diameter of the bearing is equal to the width of the slide groove, the bearing will not wobble in the width direction within the slide groove, thus preventing the locking pawl from wobbling up and down and improving the stability of the locking pawl.

[0010] Furthermore, the slot opening is chamfered.

[0011] With the above settings, the locking pin can more easily enter the slot under the chamfering action, making it easier for the locking pawl to hook the locking pin and preventing the locking pawl from getting stuck when it hooks the locking pin downwards.

[0012] Furthermore, the linear actuator is configured as a cylinder, which includes a cylinder body and an output shaft. The locking pawl mechanism also includes a support member fixedly connected to the front end of the base. The support member is provided with a limiting hole adapted to the output shaft. The cylinder body is fixedly connected to the front side of the support member, and the output shaft passes through the limiting hole and is hinged to the front end of the locking pawl.

[0013] With the above settings, the support component stably supports the output shaft, prevents the output shaft from moving up and down, reduces the bending moment on the cylinder body, and protects the cylinder body from damage.

[0014] Furthermore, the locking pawl forks at the front end to form two connecting rods, and a connecting sleeve is threaded to the end of the output shaft. The connecting sleeve is located between the connecting rods and is hinged to the connecting rods by a pin.

[0015] The above settings improve the durability of the linear actuator.

[0016] Furthermore, the lower end of the support protrudes backward to form a support platform, and the lower side of the connecting sleeve abuts against the support platform.

[0017] By implementing the above settings, the bending moment at the rear end of the output shaft is reduced, preventing the output shaft from being bent. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the locking claw mechanism in an embodiment.

[0019] Figure 2This is a cross-sectional view of the locking claw mechanism in an embodiment.

[0020] Figure 3 This is a schematic diagram of the locking claw mechanism and locking pin in an embodiment.

[0021] Figure 4 This is a schematic diagram of a locking pin installed on a battery pack, as shown in the example. Detailed Implementation

[0022] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0023] like Figures 1 to 4 As shown, a battery pack locking device includes a locking pin 3 and a locking claw mechanism. The locking pin 3 is vertically fixed to the side of the battery pack 4. The locking claw mechanism includes a base 5, a locking claw 6, a sliding part 7, and a linear actuator 8. The base 5 is fixedly connected to the bottom of the battery compartment (not shown in the figure). The base 5 has a mounting port 9 that runs through it from front to back. The locking claw 6 is F-shaped and runs through the mounting port 9 from front to back. The rear end of the locking claw 6 has a slot 10 that can be snapped downward onto the locking pin 3. The sliding part 7 is rotatably connected to the left and right sides of the middle of the locking claw 6. The mounting port 9 has a sliding groove 11 that matches the sliding part 7 on both sides. The sliding part 7 is slidably connected to the sliding groove 11. The rear end of the sliding groove 11 is inclined downward. When the slot 10 is snapped onto the locking pin 3, the sliding part 7 abuts against the rear end of the sliding groove 11. The linear actuator 8 has a self-locking function and is fixedly connected to the front side of the base 5. The output shaft 81 of the linear actuator 8 extends backward and is hinged to the front end of the locking claw 6.

[0024] With the above settings, firstly, the locking claw 6 is connected to the locking pin 3 by hooking, so the locking claw 6 will not disengage from the locking pin 3 when the linear actuator 8 is not in operation, and the locking effect is more reliable; secondly, reducing the number of parts that need to be inserted on the front side of the battery pack 4 can reduce the installation accuracy of the battery pack 4, making it easier to install the battery pack 4 into the battery compartment.

[0025] The battery pack 4 and battery compartment in this application are based on existing heavy trucks. The battery pack 4 is as follows: Figure 4 As shown, it has a basic rectangular structure, with charging racks fixedly installed on both sides of the heavy-duty truck. The charging racks contain battery compartments, with the compartment openings facing the sides of the heavy-duty truck for easy battery swapping from the side. Figure 4The front and rear directions of the battery pack 4 are indicated. The front of the battery pack 4 is the direction in which it is inserted into the battery compartment, and the rear is the direction in which it leaves the battery compartment. A locking pin 3 is fixedly connected to both the left and right sides of the battery pack 4, and the locking pin 3 is close to the front of the battery pack 4. The locking claw mechanism is installed at the bottom of the battery compartment. Two locking claw mechanisms are set in each battery compartment, which correspond one-to-one with the two locking pins 3 on the battery pack 4 and are used to cooperate with the locking pins 3. The base 5 can be fixed to the bottom of the battery compartment by welding or bolts. In this application, the base 5 is specifically locked to the bottom of the battery compartment by bolts, which facilitates the disassembly of the locking claw mechanism. Figure 1 The markings indicate the front and rear directions of the locking pawl mechanism. Specifically, the rear side of the locking pawl mechanism is the side facing the battery compartment opening, and the front side is the side facing away from the battery compartment opening. Initially, as... Figure 1 and Figure 2 As shown, the sliding part 7 is located at the front end of the slide groove 11 so that the rear end of the locking pawl 6 is tilted upwards, and the rear end of the locking pawl 6 is higher than the upper side of the locking pin 3, which facilitates the advancement of the locking pin 3 to the lower side of the slot 10; after the battery pack 4 is advanced into the battery compartment, the locking pin 3 is located on the lower side of the slot 10; when the linear drive 8 is activated, its output shaft 81 moves backwards, driving the front end of the locking pawl 6 to move backwards synchronously. During this process, the sliding part 7 moves backwards along the slide groove 11. Since the rear end of the slide groove 11 is tilted downwards, at this time, the sliding part 7 pushes the rear end of the locking pawl 6 to rotate downwards, and the slot 10 locks down onto the locking pin 3, as shown. Figure 3 As shown, the locking claw 6 abuts against the rear side of the locking pin 3 to prevent the battery pack 4 from moving backward, that is, to prevent the battery pack 4 from moving out of the battery compartment, thus achieving a locking effect. After the locking pin 3 and the locking claw 6 are engaged, the sliding part 7 abuts against the rear end of the slide groove 11. When the battery pack 4 tends to move outward, the pulling force of the battery pack 4 is transmitted to the heavy truck through the locking pin 3, the locking claw 6, the sliding part 7, and the base 5, reducing the force on the linear actuator 8 and preventing the linear actuator 8 from being damaged by tension. Moreover, the rear end of the slide groove 11 is inclined downward. When the battery pack 4 tends to move outward, the pressure between the sliding part 7 and the rear end of the slide groove 11 increases. Under the limiting action of the slide groove 11, the sliding part 7 will not move backward. The upward movement prevents the rear end of the locking pawl 6 from tilting upwards, thereby preventing the locking pawl 6 from disengaging from the locking pin 3 and ensuring locking reliability. In addition, the linear actuator 8 of this application has a self-locking effect, which can be a cylinder with a self-locking function or a nut screw structure. When the linear actuator 8 is not in operation, the front end of the locking pawl 6 will not move back and forth, which also prevents the locking pawl 6 from accidentally tilting upwards when locking the locking pin 3. Finally, the locking device of this application changes the plug-in locking form of the traditional charging rack. Fewer parts need to be plugged in on the front side of the battery pack 4, that is, fewer parts need to be positioned, and the battery pack 4 is easier to install into the battery compartment and plug into the quick-connect connector in the charging rack.

[0026] As one implementation, the locking pawl mechanism also includes a rotating shaft 12, which extends laterally through the locking pawl 6 and is fixedly connected to the locking pawl 6. The sliding part 7 is set as a bearing, which is rotatably connected to the end of the rotating shaft 12. The outer diameter of the bearing is equal to the groove width of the sliding groove 11.

[0027] With the above settings, firstly, the bearing is rotatably connected to the locking pawl 6 via the rotating shaft 12; secondly, the rotational resistance between the bearing and the rotating shaft 12 is smaller, and the bearing can rotate in the slide groove 11 to reduce the friction between the bearing and the slide groove 11; thirdly, when the outer diameter of the bearing is equal to the width of the slide groove 11, the bearing will not wobble in the width direction in the slide groove 11, thereby preventing the locking pawl 6 from wobbling up and down and improving the stability of the locking pawl 6.

[0028] As one implementation method, the slot of the card slot 10 is provided with a chamfer 14.

[0029] With the above settings, the locking pin 3 can more easily enter the slot 10 under the action of the chamfer 14, making it easier for the locking pawl 6 to hook the locking pin 3 and preventing the locking pawl 6 from getting stuck when it hooks the locking pin 3 downwards.

[0030] In one implementation, the linear actuator 8 is configured as a cylinder, which includes a cylinder body 82 and an output shaft 81. The locking pawl mechanism also includes a support member 15 fixedly connected to the front end of the base 5. The support member 15 is provided with a limiting hole 16 adapted to the output shaft 81. The cylinder body 82 is fixedly connected to the front side of the support member 15, and the output shaft 81 passes through the limiting hole 16 and is hinged to the front end of the locking pawl 6.

[0031] With the above settings, the support member 15 stably supports the output shaft 81, prevents the output shaft 81 from moving up and down, reduces the bending moment on the cylinder 82, and protects the cylinder 82 from damage.

[0032] The support member 15 of this application is locked to the base 5 by bolts. The wall of the limiting hole 16 is in contact with the output shaft 81. When the output shaft 81 moves back and forth to drive the locking pawl 6 to rotate, the rear end of the output shaft 81 is subjected to the force of the locking pawl 6 and a bending moment is generated. The support member 15 wraps around the output shaft 81 through the limiting hole 16, so that the bending moment at the rear end of the output shaft 81 is transmitted to the base 5 through the support member 15, preventing the bending moment from being transmitted to the cylinder 82 and protecting the cylinder 82 from damage.

[0033] As one implementation, the locking pawl 6 forks at the front end to form two connecting rods 61, and the output shaft 81 is threadedly connected to a connecting sleeve 17. The connecting sleeve 17 is located between the connecting rods 61 and is hinged to the connecting rods 61 by a pin.

[0034] The above settings improve the durability of the linear drive 8.

[0035] The rear end of the output shaft 81 of this application is hinged to the connecting rod 61 via a connecting sleeve 17. The connecting sleeve 17 is specifically threaded to the rear end of the output shaft 81. During long-term use, the locking device will wear due to relative rotation between the front end of the locking pawl 6 and the connecting sleeve 17. Only the connecting sleeve 17 needs to be replaced to continue using the device, and there is no need to replace the cylinder.

[0036] In one implementation, the lower end of the support member 15 protrudes backward to form a support platform 18, and the lower side of the connecting sleeve 17 abuts against the support platform 18.

[0037] By setting the above, the bending moment at the rear end of the output shaft 81 is reduced, preventing the output shaft 81 from being bent.

[0038] like Figure 3 As shown, after the locking claw 6 and the locking pin 3 are engaged, the rotating shaft 12 and the output shaft 81 are at the same height, and the locking pin 3 is lower than the rotating shaft 12. When the locking pin 3 and the battery pack 4 tend to move outward, the locking pin 3 applies outward pressure to the groove wall of the slot 10. Under the action of the above pressure, the rear end of the locking claw 6 is subjected to an upward bending moment. At this time, the support platform 18 supports the connecting sleeve 17 and applies an upward force to the connecting sleeve 17 to counteract the bending moment on the locking claw 6 and prevent the rear end of the output shaft 81 from being bent downward.

[0039] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A battery pack locking device, characterized in that, The device includes a locking pin and a locking claw mechanism. The locking pin is used to vertically fix the device to the side of the battery pack. The locking claw mechanism includes a base, a locking claw, a sliding part, and a linear actuator. The base is fixedly connected to the bottom of the battery compartment and has a through-hole on the front and back. The locking claw is F-shaped and extends through the through-hole. The rear end of the locking claw has a slot that can be engaged downwards on the locking pin. The sliding part is rotatably connected to the left and right sides of the middle of the locking claw. The left and right sides of the through-hole have grooves that fit the sliding part. The sliding part is slidably connected in the groove. The rear end of the groove is inclined downwards. When the slot is engaged on the locking pin, the sliding part abuts against the rear end of the groove. The linear actuator has a self-locking function and is fixedly connected to the front side of the base. The output axis of the linear actuator extends rearward and is hinged to the front end of the locking claw.

2. The battery pack locking device according to claim 1, characterized in that, The locking pawl mechanism also includes a rotating shaft that extends laterally through the locking pawl and is fixedly connected to it. The sliding part is configured as a bearing that is rotatably connected to the end of the rotating shaft. The outer diameter of the bearing is equal to the width of the groove.

3. The battery pack locking device according to claim 1, characterized in that, The slot opening is chamfered.

4. A battery pack locking device according to claim 1, characterized in that, The linear actuator is configured as a cylinder, which includes a cylinder body and an output shaft. The locking pawl mechanism also includes a support member fixedly connected to the front end of the base. The support member is provided with a limiting hole adapted to the output shaft. The cylinder body is fixedly connected to the front side of the support member. The output shaft passes through the limiting hole and is hinged to the front end of the locking pawl.

5. A battery pack locking device according to claim 4, characterized in that, The locking pawl forks at its front end to form two connecting rods. The output shaft end is threaded with a connecting sleeve, which is disposed between the connecting rods and hinged to the connecting rods via a pin.

6. A battery pack locking device according to claim 5, characterized in that, The lower end of the support protrudes backward to form a support platform, and the lower side of the connecting sleeve abuts against the support platform.

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