A battery pack trailer suitable for a trailing electric excavator

Abstract

The utility model discloses a battery pack trailer suitable for towing electric excavator turns the field belongs to towing electric excavator technical field, including trailer chassis, the front end bottom articulation first draw bar of trailer chassis, and first draw bar rotates up and down relative trailer chassis, the front end articulation second draw bar of first draw bar, and second draw bar rotates horizontally relative first draw bar, and the both sides of second draw bar front end are equipped with assembly hole, and are connected with lower frame X frame both sides, the top surface of trailer chassis rear end installs battery pack, and the cable is connected between battery pack and towing electric excavator, the top surface middle connection support rod of trailer chassis front end, and the top articulation cantilever bar of support rod, and cantile bar rotates horizontally relative support rod, and the cable is connected on support rod, cantilever bar. Solve the prior art in the hooking of traction structure and towing electric excavator lower frame X frame, when towing electric excavator turns, cause power car or traction structure and lower frame X frame both sides contact, cause power car damage or rollover technical problem.

Description

Technical Field

[0001] This utility model belongs to the technical field of electric excavators, specifically relating to a battery pack trailer suitable for the relocation of electric excavators. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] Electric-mounted excavators rely on a power grid electrical cabinet for power, and the excavator and the electrical cabinet need to be connected by cables. Because the electrical cabinet is a fixed device, the operating area of ​​the electric-mounted excavator is limited, and it cannot be moved long distances within the site.

[0004] The prior art discloses a mobile power supply vehicle for a tethered electric excavator, including: a chassis, a battery system, and a high-voltage controller mounted on the chassis; the chassis is equipped with a drive mechanism and tires, and the chassis includes a main structure and a traction structure, the traction structure being hooked to the tethered electric excavator.

[0005] The above solution has the following drawbacks: When the aforementioned traction structure is hooked to the electric excavator, it must be hooked onto the X-frame of the electric excavator's undercarriage. (If it is hooked onto the upper assembly of the electric excavator, when the electric excavator moves forward, the upper assembly rotates relative to the X-frame of the undercarriage, causing the traction structure to rotate as well, resulting in a deviation between the power supply vehicle and the electric excavator's direction of travel and potentially causing a rollover.) The aforementioned traction structure is a straight rod with a hook hole at its front end. When hooked onto the X-frame of the electric excavator's undercarriage, it must be connected to the middle of the X-frame (the middle of the X-frame is usually a recessed area). When the electric excavator turns, this can cause the power supply vehicle or traction structure to come into contact with the sides of the X-frame of the undercarriage, leading to damage to the power supply vehicle or a rollover. Furthermore, the cable in the aforementioned solution connects the electric excavator and the power supply vehicle. During turning and straightening, the end of the cable connected to the power supply vehicle will twist repeatedly, causing damage or breakage at the end. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide a battery pack trailer suitable for the relocation of electric excavators, which can solve the technical problems in the prior art where the traction structure hooks with the X-frame of the electric excavator's undercarriage, causing the power vehicle or traction structure to come into contact with both sides of the X-frame when the electric excavator turns, resulting in damage or overturning of the power vehicle; and the technical problem that the end of the cable connected to the power vehicle will twist back and forth during the turning and straightening process, resulting in damage or breakage of the end.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A battery pack trailer suitable for transporting electric excavators is provided, including a trailer chassis, with a first drawbar hinged to the bottom front end of the trailer chassis, and the first drawbar rotating up and down relative to the trailer chassis; The first traction rod is hinged to the second traction rod at its front end. The second traction rod rotates horizontally relative to the first traction rod. Mounting holes are opened on both sides of the front end of the second traction rod for connecting to both sides of the X-frame of the undercarriage of the electric excavator. A battery pack is installed on the top rear end of the trailer chassis, and a cable connects the battery pack to the electric towed excavator. A support rod is connected to the middle of the front top surface of the trailer chassis. A cantilever rod is hinged to the top of the support rod. The cantilever rod rotates horizontally relative to the support rod. Cables are connected to the support rod and the cantilever rod.

[0008] Preferably, four limiting blocks are fixedly connected to the top surface of the trailer chassis. The limiting blocks are L-shaped and include two mutually perpendicular and fixedly connected flat plates, both of which are perpendicular to the trailer chassis. The limiting blocks are located at the four corners of the battery pack.

[0009] Preferably, the limiting block also includes a stiffening rib, which is fixedly connected to the side of the flat plate facing away from the battery pack, and the stiffening rib is also fixedly connected to the trailer chassis.

[0010] Preferably, an instrument mounting plate is welded onto the support rod for mounting the instrument panel that is connected to the battery pack; multiple cable clamp fixing plates are also welded onto the support rod for clamping and fixing cables.

[0011] Preferably, two connecting plates are welded to the top of the support rod; the cantilever rod includes a hollow sleeve rod, which is installed between the two connecting plates. The connecting plates have pin holes of the same position and size, through which a pin is passed and through the pin holes of the connecting plates and the sleeve rod. The diameter of the pin is smaller than that of the sleeve rod.

[0012] Preferably, a cantilever straight rod is welded to the bottom of the sleeve rod, and a cantilever diagonal rod is welded to the top. The other end of the cantilever diagonal rod is welded and fixed to the other end of the cantilever straight rod. A cantilever support rod is also welded between the cantilever straight rod and the cantilever diagonal rod.

[0013] Preferably, the first tow bar is an isosceles triangle, including two first side bars and a first bottom bar, with both ends of the first bottom bar hinged to the trailer chassis.

[0014] Preferably, the second traction rod is also an isosceles triangle, including two second side rods and a second base rod, with the apex ends of the first traction rod and the second traction rod hinged together.

[0015] Preferably, the second drawbar has various sizes and specifications, the angle of the top corner of the second drawbar remains unchanged, and the length of the second bottom bar matches the width of the undercarriage X-frame of the compatible electric excavator model.

[0016] Preferably, the trailer chassis is equipped with multiple sets of swivel wheels.

[0017] Compared with the prior art, the advantages and positive effects of this utility model are: This invention hinges a second traction rod to the front end of the first traction rod, connecting the front end of the second traction rod to both sides of the undercarriage X-frame. The trailer chassis is connected to the rear of the electric excavator. When the electric excavator turns, it prevents the first or second traction rod or the trailer chassis from contacting the sides of the undercarriage X-frame, thus preventing damage to the trailer chassis or rollover and ensuring stable and safe relocation of the electric excavator. The cable connecting the battery pack and the electric excavator is connected to the cantilever and support rod. When the electric excavator turns, the cable rotates with the cantilever relative to the support rod. During the turning and straightening process of the electric excavator, the end of the cable connected to the battery pack will not twist or break, ensuring the safety of the cable connection. Attached Figure Description

[0018] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0019] Figure 1 This is a schematic diagram of the structure of a battery pack trailer applicable to the relocation of electric excavators according to an embodiment of this utility model; In the picture: 1. Cantilever rod; 2. Cable clamp fixing plate; 3. Support rod; 4. Instrument mounting plate; 5. Battery pack; 6. Limit block; 7. Trailer chassis; 8. Casters; 9. First tow bar; 10. Second tow bar. Detailed Implementation

[0020] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0021] The present invention will now be described in detail with reference to the accompanying drawings. This embodiment discloses a battery pack trailer suitable for the relocation of electric excavators, such as... Figure 1As shown, the system includes a trailer chassis 7. A first drawbar 9 is hinged to the bottom front end of the trailer chassis 7 (with the end facing the electric excavator as the front end and the other end as the rear end). The first drawbar 9 rotates up and down relative to the trailer chassis 7. After the first drawbar 9 is connected to the electric excavator, its vertical rotation relative to the trailer chassis 7 allows it to adapt to bumpy roads. In this embodiment, a second drawbar 10 is hinged to the front end of the first drawbar 9. The second drawbar 10 rotates horizontally relative to the first drawbar 9. Mounting holes are provided on both sides of the front end of the second drawbar 10, connecting it to the sides of the X-frame of the electric excavator's underframe. When the electric excavator turns, the X-frame drives the second drawbar 10 to rotate horizontally relative to the first drawbar 9, allowing the trailer chassis 7 to follow the electric excavator's turn without colliding with the X-frame of the electric excavator during the turn.

[0022] In this embodiment, as Figure 1 As shown, a battery pack 5 is installed on the top rear end of the trailer chassis 7. A cable connects the battery pack 5 to the electric towed excavator, supplying power to the excavator via the battery pack 5. A support rod 3 is also connected to the middle of the top front end of the trailer chassis 7. A cantilever rod 1 is hinged to the top of the support rod 3, and the cantilever rod 1 rotates horizontally relative to the support rod 3. The cable connecting the battery pack 5 and the electric towed excavator is connected to the support rod 3 and the cantilever rod 1. In this embodiment, when the electric towed excavator turns, the cable connecting the battery pack 5 and the electric towed excavator rotates along with the cantilever rod 1 relative to the support rod 3.

[0023] In this embodiment, the second traction rod 10 is connected to both sides of the lower frame X-frame, so that the trailer chassis 7 is connected to the rear of the electric excavator. When the electric excavator turns, the traction structure or power vehicle will not come into contact with the sides of the lower frame X-frame, which could lead to damage or overturning of the power vehicle. The cable connecting the battery pack 5 and the electric excavator is connected to the cantilever 1 and the support rod 3. When the electric excavator turns, the cable rotates with the cantilever 1 relative to the support rod 3. This avoids the situation in the prior art where the cable is connected between the electric excavator and the power vehicle, and the end of the cable connected to the power vehicle twists back and forth during turning and straightening, which could cause damage or breakage at the end.

[0024] In this embodiment, as Figure 1 As shown, four limiting blocks 6 are fixedly connected (which can be done by welding) on ​​the top surface of the trailer chassis 7. The limiting blocks 6 are L-shaped and include two mutually perpendicular and fixedly connected flat plates, both of which are perpendicular to the trailer chassis 7. In this embodiment, the battery pack 5 is a square battery pack, and the limiting blocks 6 are located at the four corners of the battery pack 5 to limit the displacement of the battery pack 5.

[0025] like Figure 1As shown, the limiting block 6 also includes a stiffening rib, which is fixedly connected to the side of the flatbed facing away from the battery pack. The stiffening rib is perpendicular to the trailer chassis 7 and fixedly connected to the trailer chassis 7. The stiffening rib is used to strengthen the limiting function of the flatbed for the battery pack, and to prevent the battery pack 5 from damaging a flatbed due to the turning inertia when the electric excavator is turning.

[0026] In this embodiment, as Figure 1 As shown, an instrument mounting plate 4 is welded onto the support rod 3. The instrument mounting plate 4 can be used to mount an instrument panel that is connected to the battery pack 5. The instrument panel displays the working information and working status of the battery pack 5.

[0027] In this embodiment, as Figure 1 As shown, multiple cable clamp fixing plates 2 are welded onto the support rod 3 to clamp and fix the cable connecting the battery pack 5 and the electric excavator within the cable clamp fixing plates 2, thereby connecting the cable connecting the battery pack 5 and the electric excavator to the support rod 3.

[0028] In this embodiment, as Figure 1 As shown, two connecting plates are welded to the front side of the top of the support rod 3 (i.e., the side facing the electric tractor). One connecting plate is located at the top of the support rod 3, and the other connecting plate is located at the front side of the support rod 3. The cantilever rod 1 includes a hollow sleeve rod. The length of the sleeve rod is less than the distance between the two connecting plates on the support rod 3. The sleeve rod is installed between the two connecting plates of the support rod 3. Pin holes of the same position and size are opened on the connecting plates. The pin shaft passes through the pin hole of the connecting plate and the sleeve rod. The diameter of the pin shaft is smaller than that of the sleeve rod, so that the sleeve rod can rotate horizontally relative to the support rod 3.

[0029] In this embodiment, a cantilever straight rod is welded to the bottom of the sleeve rod, and a cantilever diagonal rod is welded to the top. The other end of the cantilever diagonal rod is welded and fixed to the other end of the cantilever straight rod. A cantilever support rod is also welded between the cantilever straight rod and the cantilever diagonal rod to strengthen the connection between them. The cable of the battery pack 5 can be wound around the cantilever straight rod and the cantilever diagonal rod and then connected to the electric towed excavator. Due to the weight of the cable and for safety reasons, the cable is not tautly connected between the support rod 3 and the electric towed excavator. Instead, a certain length is reserved to allow the cable to bend downwards. The cantilever diagonal rod can strengthen the support strength of the cantilever straight rod.

[0030] Furthermore, by setting up support rod 3 and cantilever rod 1 to support the cable connecting the battery pack 5 and the electric excavator, and supporting the cable above the first traction rod 9 and the second traction rod 10, the cable can not only rotate with the cantilever rod 1 relative to the support rod 3, but also avoids the cable dragging on the ground and causing wear when turning. In the existing technology, the power supply vehicle and the electric excavator are connected by a cable, which poses a risk of the cable sagging and dragging on the ground when the electric excavator turns, as the distance between the electric excavator and the power supply vehicle changes.

[0031] In this embodiment, as Figure 1 As shown, the first traction rod 9 is an isosceles triangle, including two first side rods and one first bottom rod. The two ends of the first bottom rod are hinged to the trailer chassis 7. The second traction rod 10 is also an isosceles triangle, including two second side rods and one second bottom rod. The apex ends of the first traction rod 9 and the second traction rod 10 are hinged together to ensure that the electric excavator has a sufficient turning radius when turning the trailer. When turning, the first traction rod 9 and the second traction rod 10 do not interfere with each other.

[0032] Specifically, a connector is welded to the top corner of the first traction rod 9, and a pin hole (opening in the up and down direction) is opened on the connector. An upper ear plate and a lower ear plate are welded to the top corner of the second traction rod 10, and pin holes are opened on both the upper ear plate and the lower ear plate. The connector is inserted between the upper ear plate and the lower ear plate, and the pin is inserted to realize the hinge connection between the first traction rod 9 and the second traction rod 10.

[0033] In this embodiment, the second traction rod 10 has various sizes and specifications. Generally speaking, the apex angle of the second traction rod 10 remains unchanged, while the length of the second bottom rod of the second traction rod 10 varies. The length of the second bottom rod matches the width of the X-frame of the corresponding model. It can be understood that since the apex angle of the second traction rod 10 remains unchanged, the length of the second waist rod also changes accordingly based on the change in the length of the second bottom rod. By hinged to the first traction rod 9 with different specifications of second traction rods 10, different models of electric tow excavators can be adapted.

[0034] In this embodiment, as Figure 1 As shown, multiple sets of casters 8 are installed on the bottom surface of the trailer chassis 7 to support the trailer chassis 7 and enable the trailer chassis 7 to move and follow the steering.

[0035] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A battery pack trailer suitable for the relocation of electric excavators, characterized in that, Includes a trailer chassis, wherein a first drawbar is hinged to the bottom front end of the trailer chassis, and the first drawbar rotates up and down relative to the trailer chassis; The first traction rod is hinged to the front end of the second traction rod, the second traction rod rotates horizontally relative to the first traction rod, and mounting holes are opened on both sides of the front end of the second traction rod to connect with the two sides of the X-frame of the undercarriage of the electric excavator. A battery pack is installed on the top rear end of the trailer chassis, and a cable connects the battery pack to the electric towed excavator; a support rod is connected to the middle of the top front end of the trailer chassis, and a cantilever rod is hinged to the top of the support rod. The cantilever rod rotates horizontally relative to the support rod, and a cable is connected to the support rod and the cantilever rod.

2. The battery pack trailer for transporting electric excavators as described in claim 1, characterized in that, Four limiting blocks are fixedly connected to the top surface of the trailer chassis. The limiting blocks are L-shaped and include two mutually perpendicular and fixedly connected flat plates, both of which are perpendicular to the trailer chassis. The limiting blocks are located at the four corners of the battery pack.

3. A battery pack trailer for transporting electric excavators as described in claim 2, characterized in that, The limiting block also includes a stiffening rib, which is fixedly connected to the side of the flat plate facing away from the battery pack, and is also fixedly connected to the trailer chassis.

4. A battery pack trailer for transporting electric excavators as described in claim 1, characterized in that, An instrument mounting plate is welded onto the support rod for mounting the instrument panel that is connected to the battery pack; multiple cable clamp fixing plates are also welded onto the support rod for clamping and fixing cables.

5. A battery pack trailer for transporting electric excavators as described in claim 1, characterized in that, Two connecting plates are welded to the top of the support rod; the cantilever rod includes a hollow sleeve rod, which is installed between the two connecting plates. The connecting plates have pin holes of the same position and size, through which a pin is passed and through the pin holes of the connecting plates and the sleeve rod. The diameter of the pin is smaller than that of the sleeve rod.

6. A battery pack trailer for transporting electric excavators as described in claim 5, characterized in that, The bottom of the sleeve rod is welded with a cantilever straight rod, and the top is welded with a cantilever diagonal rod. The other end of the cantilever diagonal rod is welded and fixed to the other end of the cantilever straight rod. A cantilever support rod is also welded between the cantilever straight rod and the cantilever diagonal rod.

7. A battery pack trailer for transporting electric excavators as described in claim 1, characterized in that, The first tow bar is an isosceles triangle, comprising two first side bars and one first bottom bar, with both ends of the first bottom bar hinged to the trailer chassis.

8. A battery pack trailer for transporting electric excavators as described in claim 1, characterized in that, The second traction rod is also an isosceles triangle, including two second side rods and a second bottom rod, with the apex ends of the first traction rod and the second traction rod hinged together.

9. A battery pack trailer for transporting electric excavators as described in claim 8, characterized in that, The second drawbar is available in various sizes and specifications. The angle of the top corner of the second drawbar remains constant. The length of the second bottom bar matches the width of the X-frame of the undercarriage of the compatible electric excavator.

10. A battery pack trailer for transporting electric excavators as described in claim 1, characterized in that, The trailer chassis is equipped with multiple sets of swivel wheels on its underside.

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