Self-adaptive electric heavy truck battery swap station battery pack lifting appliance

Abstract

The invention belongs to the technical field of battery swap station lifting appliances, and particularly relates to a self-adaptive electric heavy truck battery swap station battery pack lifting appliance which comprises an upper frame and a lower frame, the upper frame is fixedly mounted at the bottom of a moving crane, six guide wheels are mounted at the bottom of the lower frame, and the six guide wheels are used for positioning the lower frame and a battery pack. The angle deviation of the battery pack on the heavy truck can be automatically compensated, and the adaptability and the success rate of the battery replacement process are improved; automatic switching between rigidity and flexibility can be achieved, stable movement of the battery pack in the hoisting process is guaranteed, and the safety of battery replacement operation is improved; the overall structure is simple, complex rotating mechanisms are reduced, the stability of the system is improved, and the service life of the system is prolonged; by adopting the design of six guide wheels, the self-adaptive positioning and grabbing capability of the battery pack is improved, and the reliability of the battery replacement process is further enhanced; a complex visual identification system is not needed, the system cost and the fault rate are reduced, and meanwhile the battery replacement efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery swap station hoists, and in particular to an adaptive battery pack hoist for an electric heavy truck battery swap station. Background Art

[0002] As the country pays more and more attention to environmental protection, it has become an irreversible trend for electric heavy trucks (referred to as electric heavy trucks) to gradually replace traditional fuel heavy trucks. However, due to the large battery capacity and long charging time of electric heavy trucks, in China, where logistics pressure is relatively high, trucks need to operate continuously for a long time. Therefore, the battery replacement system has gradually become the mainstream way to supplement energy for electric heavy trucks.

[0003] The basic structure commonly used by the existing electric heavy truck battery swap station hoist is: a rectangular hoist frame with four fixed pulleys above the four corners of the rectangle, and the hoist frame is lifted by retracting and releasing the wire rope. In order to prevent the battery from shaking during movement, a rigid guide mechanism is arranged above the hoist frame. However, when the angular alignment error between the hoist frame and the battery pack is large, it is often impossible to grab.

[0004] At present, most heavy truck swap stations use visual recognition systems to detect the angle deviation of the battery pack and actively adjust the angle of the hoist through a rotating mechanism to adapt to the angle error of the battery pack. However, this method has the following problems:

[0005] 1. Complex structure: The design of the rotating mechanism increases the complexity of the entire system;

[0006] 2. Poor stability: The complex rotating structure leads to reduced system stability;

[0007] 3. Short service life: Mechanical rotating parts are prone to wear, which reduces the service life of the equipment;

[0008] 4. Recognition error: The visual recognition system may misjudge, which may lead to incorrect estimation of angle deviation;

[0009] 5. Safety hazards: Due to the above problems, lifting accidents are likely to occur during actual use, threatening the safety of operators and equipment.

[0010] Therefore, how to overcome the defects of the complex and unstable structure of existing battery hangers and improve the efficiency and safety of battery replacement has become a technical problem that needs to be solved urgently. Summary of the invention

[0011] 1. Technical issues to be resolved

[0012] In view of the deficiencies in the prior art, the present invention provides an adaptive electric heavy-duty truck battery pack hanger for battery swap stations, which solves the problems raised in the above-mentioned background technology.

[0013] (II) Technical solution

[0014] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0015] An adaptive battery pack hoist for an electric heavy-duty truck battery swap station comprises an upper frame and a lower frame, wherein the upper frame is fixedly mounted on the bottom of a mobile vehicle, and six guide wheels are mounted on the bottom of the lower frame, and the six guide wheels are used for positioning the lower frame and the battery pack. Connectors are fixed to both side walls at both ends of the lower frame, and four first distance sensors are mounted on the four connecting members, and the four first distance sensors are used to detect whether the lower frame is in contact with the top frame of the battery pack when the battery pack is suspended. A rotating clamping mechanism for adaptively clamping and releasing the battery pack is mounted on the lower frame, and an automatic rigid-flexible switching guide mechanism is arranged between the lower frame and the upper frame, and four lifting ears are symmetrically fixed to the top of the lower frame, and anchor chains are fixedly connected to the four lifting ears.

[0016] Furthermore, the rotating clamping mechanism includes two mounting plates symmetrically fixed at both ends of the top of the lower frame, a U-shaped seat is fixed at the top center position of the mounting plate, a DC reduction motor is fixed on the top of the U-shaped seat, the output shaft of the DC reduction motor passes through the top inner wall of the U-shaped seat and is fixed with a driving rocker, both ends of the driving rocker are rotatably connected with connecting rods through pins, the ends of the two connecting rods away from the driving rocker are rotatably connected with rocker arms through pins, the ends of the two rocker arms away from the connecting rods are equipped with rotating shafts, the two rotating shafts pass through the mounting plate, the top ends of the two rotating shafts are equipped with stop sleeves, the stop sleeves are attached to the top of the mounting plate, the bottom ends of the two rotating shafts pass through the bottom of the lower frame and are fixed with clamps for clamping the battery pack, and the two clamps are arranged opposite to each other.

[0017] Furthermore, a groove for installing a swing rod is formed at the top end of the rotating shaft, and a pressure cover for pressing the swing rod is fixedly installed at the top end of the rotating shaft by screws.

[0018] Furthermore, pin holes are provided on the surfaces of the rotating shaft and the stop sleeve, and the stop sleeve is fixedly connected to the rotating shaft via a cylindrical pin.

[0019] Furthermore, four mounting seats are fixed on the top of the mounting plate, and second distance sensors are installed on the four mounting seats. The four second distance sensors are respectively arranged on one side of the two swing arms and one side of the two connecting rods.

[0020] Furthermore, four through holes adapted to the rotating shafts are symmetrically provided on the surface of the lower frame.

[0021] Furthermore, the automatic rigid-flexible switching guide mechanism includes four fixed guide tubes vertically fixed at the four corners of the top of the lower frame, the tops of the four fixed guide tubes are fixed with fixed plates, the tops of the four fixed plates are fitted with movable guide tubes, the middle parts of the four fixed plates are penetrated by steel wire ropes, both ends of the four steel wire ropes are fixed with blocks, one end of the steel wire rope is arranged in the corresponding fixed guide tube, and the other end of the steel wire rope is arranged in the corresponding movable guide tube, the four corners of the upper frame are penetrated and fixed with sleeves, and the four movable guide tubes slide through the corresponding sleeves respectively.

[0022] Furthermore, buffer damping pads are fixed to the lower surfaces of the four sleeves, and avoidance holes for avoiding the movable guide tube are opened at the bottoms of the buffer damping pads.

[0023] (III) Beneficial effects

[0024] Compared with the prior art, the present invention provides an adaptive electric heavy truck battery pack hoist for battery swap stations, which has the following beneficial effects:

[0025] 1. The present invention can automatically compensate for the angle deviation of the battery pack on the heavy truck, thereby improving the adaptability and success rate of the battery replacement process.

[0026] 2. The present invention can realize automatic switching between rigidity and flexibility, ensure stable movement of the battery pack during lifting, and improve the safety of battery replacement operations.

[0027] 3. The present invention has a simple structure, reduces the complex rotating mechanism, and improves the stability and service life of the system.

[0028] 4. By adopting a 6-guide wheel design, the present invention improves the adaptive positioning and grasping capability of the battery pack, and further enhances the reliability of the battery replacement process.

[0029] 5. The present invention does not require a complex visual recognition system, which reduces system cost and failure rate, while improving battery replacement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0031] Figure 2 It is a schematic diagram of the three-dimensional structure of the lower frame of the present invention;

[0032] Figure 3 It is a schematic diagram of the side view structure of the lower frame of the present invention;

[0033] Figure 4 For the present invention Figure 3 Schematic diagram of the cross-section structure at the middle edge AA;

[0034] Figure 5 It is a schematic diagram of the connecting rod structure of the present invention;

[0035] Figure 6 It is a schematic diagram of the swing rod structure of the present invention;

[0036] Figure 7 This is a schematic diagram of the driving rocker structure of the present invention.

[0037] In the figure: 1. upper frame; 2. lower frame; 3. guide wheel; 4. connecting piece; 5. first distance sensor; 6. rotating clamping mechanism; 601. mounting plate; 602. U-shaped seat; 603. DC reduction motor; 604. driving rocker; 605. connecting rod; 606. rocker; 607. rotating shaft; 608. stopper sleeve; 609. clamping claw; 610. pressure cover; 611. cylindrical pin; 612. mounting seat; 613. second distance sensor; 7. automatic rigid-flexible switching guide mechanism; 701. fixed guide tube; 702. fixed plate; 703. movable guide tube; 704. wire rope; 705. stopper; 706. sleeve; 707. buffer damping pad; 8. lifting ear; 9. anchor chain. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Example

[0040] like Figure 1As shown, an adaptive electric heavy-duty truck battery swap station battery pack hoist proposed in one embodiment of the present invention comprises an upper frame 1 and a lower frame 2, the upper frame 1 is fixedly mounted on the bottom of a mobile vehicle, six guide wheels 3 are mounted on the bottom of the lower frame 2, the six guide wheels 3 are used to position the lower frame 2 and the battery pack, connecting pieces 4 are fixed to both side walls at both ends of the lower frame 2, four connecting pieces 4 are mounted with first distance sensors 5, the four first distance sensors 5 are used to detect whether the lower frame 2 is in contact with the top frame of the battery pack when the battery pack is suspended, a rotating clamping mechanism 6 for adaptively clamping and releasing the battery pack is mounted on the lower frame 2, an automatic rigid-flexible switching guide mechanism 7 is arranged between the lower frame 2 and the upper frame 1, four lifting ears 8 are symmetrically fixed to the top of the lower frame 2, and anchor chains 9 are fixedly connected to the four lifting ears 8; the upper frame 1 is mounted on the mobile vehicle The top of the anchor chain 9 is connected to the suspension mechanism. When the battery pack of the electric heavy truck needs to be lifted, the entire lifting device is moved above the battery pack, and then the anchor chain 9 is controlled to move downward by the suspension mechanism, so that the lower frame 2 can be driven to approach the battery pack. When the lower frame 2 descends to approach the battery pack, the six guide wheels 3 first contact the battery pack to achieve preliminary adaptive positioning. It should be noted here that when the four first distance sensors 5 are set to detect that the lower frame 2 is in contact with the top frame of the battery pack, the rotating clamping mechanism 6 is used to clamp and fix the battery pack, and then the suspension mechanism is used to drive the anchor chain 9 to move upward, so that the battery pack can be lifted up. During the lifting process, the automatic rigid-flexible switching guide mechanism 7 can ensure the stability of the battery pack during movement.

[0041] like Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7As shown, in some embodiments, the rotating clamping mechanism 6 includes two mounting plates 601 symmetrically fixed at both ends of the top of the lower frame 2, a U-shaped seat 602 is fixed at the top center of the mounting plate 601, a DC reduction motor 603 is fixed on the top of the U-shaped seat 602, the output shaft of the DC reduction motor 603 passes through the top inner wall of the U-shaped seat 602 and is fixed with a driving rocker 604, both ends of the driving rocker 604 are rotatably connected with a connecting rod 605 through a pin shaft, the ends of the two connecting rods 605 away from the driving rocker 604 are rotatably connected with a rocker 606 through a pin shaft, and the ends of the two rocker rods 606 away from the connecting rod 605 are installed with a rotating shaft 607, the two rotating shafts 607 pass through the mounting plate 601, and the tops of the two rotating shafts 607 are installed with a stopper sleeve 608, the stopper sleeve 608 is attached to the top of the mounting plate 601, and the bottom ends of the two rotating shafts 607 pass through the bottom of the lower frame 2 and are sleeved and fixed with a clamping claw 609 for clamping the battery pack. The two clamping claws 609 are arranged opposite to each other, and the surface of the lower frame 2 is symmetrically provided with four through holes adapted to the rotating shaft 607. The top of the rotating shaft 607 is provided with a groove for installing the swing rod 606. The top of the rotating shaft 607 is fixed with a pressure cover 610 for pressing the swing rod 606 by screws. The surfaces of the rotating shaft 607 and the stopper sleeve 608 are provided with pin holes, and the stopper sleeve 608 is fixedly connected to the rotating shaft 607 by a cylindrical pin 611. When the battery pack needs to be clamped and fixed When the two DC reduction motors 603 are started, the DC reduction motors 603 can drive the driving rocker 604 to deflect, the driving rocker 604 can drive the two connecting rods 605 on its surface to deflect, the connecting rod 605 can drive the corresponding rocker arm 606 to deflect, the rocker arm 606 can drive the corresponding rotating shaft 607 to deflect, the rotating shaft 607 can drive the clamping claws 609 on its surface to deflect, and the battery pack can be clamped and fixed under the clamping action of the four clamping claws 609.

[0042] like Figure 1 , Figure 5 , Figure 6 and Figure 7 As shown, in some embodiments, four mounting seats 612 are fixed to the top of the mounting plate 601, and second distance sensors 613 are installed on the four mounting seats 612. The four second distance sensors 613 are respectively arranged on one side of the two rocker arms 606 and one side of the two connecting rods 605. The four second distance sensors 613 can detect the deflection state of the rocker arms 606 and the connecting rods 605, so as to detect the deflection state of the hook 609, and further detect whether the hook 609 stably clamps and fixes the battery pack, thereby ensuring the safety of the suspended battery pack.

[0043] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, in some embodiments, the automatic rigid-flexible switching guide mechanism 7 includes four fixed guide tubes 701 vertically fixed at the four corners of the top of the lower frame 2, the tops of the four fixed guide tubes 701 are fixed with fixed plates 702, the tops of the four fixed plates 702 are fitted with movable guide tubes 703, the middles of the four fixed plates 702 are penetrated by steel wire ropes 704, both ends of the four steel wire ropes 704 are fixed with blocks 705, one end of the steel wire rope 704 is set in the corresponding fixed guide tube 701, and the other end of the steel wire rope 704 is set in the corresponding movable guide tube 703, the four corners of the upper frame 1 are penetrated and fixed with sleeves 706, and the four movable guide tubes 703 are fixed. 03 slide through the corresponding sleeves 706 respectively, and buffer damping pads 707 are fixed to the lower surfaces of the four sleeves 706. The bottom of the buffer damping pads 707 is provided with an avoidance hole for avoiding the movable guide tube 703; in the process of hoisting the battery pack, a steel wire rope 704 is arranged between the fixed guide tube 701 and the movable guide tube 703 to provide a flexible connection, so that the fixed guide tube 701 can be movable relative to the movable guide tube 703, thereby facilitating the alignment operation of the lower frame 2 and the battery pack, and the arranged sleeves 706 and damping buffer pads 707 can provide rigid support and buffering effect, thereby ensuring the stability of the battery pack during movement.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adaptive battery pack hanger for an electric heavy truck battery swap station, comprising an upper frame (1) and a lower frame (2), characterized in that: The upper frame (1) is fixedly mounted on the bottom of the mobile vehicle, six guide wheels (3) are mounted on the bottom of the lower frame (2), and the six guide wheels (3) are used to position the lower frame (2) and the battery pack. Connectors (4) are fixed to both side walls of the two ends of the lower frame (2), and four first distance sensors (5) are mounted on the four connectors (4). The four first distance sensors (5) are used to detect whether the lower frame (2) is in contact with the top frame of the battery pack when the battery pack is suspended. A rotating clamping mechanism (6) for adaptively clamping and releasing the battery pack is mounted on the lower frame (2), and an automatic rigid-flexible switching guide mechanism (7) is arranged between the lower frame (2) and the upper frame (1). Four lifting ears (8) are symmetrically fixed to the top of the lower frame (2), and anchor chains (9) are fixedly connected to the four lifting ears (8).

2. The adaptive battery pack hanger for electric heavy truck battery swap station according to claim 1, characterized in that: The rotary clamping mechanism (6) comprises two mounting plates (601) symmetrically fixed at two ends of the top of the lower frame (2); a U-shaped seat (602) is fixed at the center position of the top of the mounting plate (601); a DC reduction motor (603) is fixed at the top of the U-shaped seat (602); an output shaft of the DC reduction motor (603) passes through the top inner wall of the U-shaped seat (602) and is fixed with a driving rocker (604); both ends of the driving rocker (604) are rotatably connected to connecting rods (605) via pins; the two connecting rods (605) are away from the driving rocker (604). 04) are rotatably connected to a swing rod (606) at one end through a pin shaft, and a rotating shaft (607) is installed at one end of the two swing rods (606) away from the connecting rod (605), and the two rotating shafts (607) pass through the mounting plate (601), and a stop sleeve (608) is installed at the top of the two rotating shafts (607), and the stop sleeve (608) is attached to the top of the mounting plate (601), and the bottom ends of the two rotating shafts (607) pass through the bottom of the lower frame (2) and are sleeved and fixed with a clamping claw (609) for clamping the battery pack, and the two clamping claws (609) are arranged opposite to each other.

3. The adaptive electric heavy truck battery pack lifting device for battery swap station according to claim 2 is characterized by: The top end of the rotating shaft (607) is provided with a groove for mounting the swing rod (606), and the top end of the rotating shaft (607) is fixed with a pressure cover (610) for pressing the swing rod (606) by means of screws.

4. The adaptive electric heavy truck battery pack lifting device for battery swap station according to claim 2, characterized in that: Pin holes are provided on the surfaces of the rotating shaft (607) and the stop sleeve (608), and the stop sleeve (608) is fixedly connected to the rotating shaft (607) via a cylindrical pin (611).

5. The adaptive electric heavy truck battery pack lifting device for battery swap station according to claim 2, characterized in that: Four mounting seats (612) are fixed on the top of the mounting plate (601), and second distance sensors (613) are installed on the four mounting seats (612). The four second distance sensors (613) are respectively arranged on one side of the two swing rods (606) and one side of the two connecting rods (605).

6. The adaptive battery pack hanger for electric heavy truck battery swap station according to claim 2, characterized in that: The surface of the lower frame (2) is symmetrically provided with four through holes adapted to fit the rotating shaft (607).

7. The adaptive battery pack hanger for electric heavy truck battery swap station according to claim 1, characterized in that: The automatic rigid-flexible switching guide mechanism (7) comprises four fixed guide tubes (701) vertically fixed at the four corners of the top of the lower frame (2); the tops of the four fixed guide tubes (701) are fixed with fixed plates (702); the tops of the four fixed plates (702) are fitted with movable guide tubes (703); the middles of the four fixed plates (702) are penetrated by steel wire ropes (704); both ends of the four steel wire ropes (704) are fixed with stoppers (705); one end of the steel wire rope (704) is arranged in the corresponding fixed guide tube (701); the other end of the steel wire rope (704) is arranged in the corresponding movable guide tube (703); the four corners of the upper frame (1) are penetrated and fixed with sleeves (706); the four movable guide tubes (703) slide through the corresponding sleeves (706) respectively.

8. The adaptive battery pack hanger for electric heavy truck battery swap station according to claim 7, characterized in that: A buffer damping pad (707) is fixed to the lower surface of each of the four sleeves (706), and an avoidance hole for avoiding the movable guide tube (703) is provided at the bottom of each of the buffer damping pads (707).

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