Towed electric excavator and chassis thereof

Abstract

The utility model relates to an electric excavator, in order to overcome the defect that an existing electric excavator is provided with a cable trolley to take up and pay off a cable, the electric excavator and a chassis of the electric excavator are constructed, and the chassis of the electric excavator comprises a walking frame, crawler beams arranged on the left side and the right side of the walking frame, an installation base and a cable drum support. The left end and the right end of the installation cross beam are fixedly connected with crawler beams on the corresponding sides, the front end and the rear end of the installation longitudinal beam are correspondingly welded to the walking frame and the installation cross beam, and the end of the cable drum support is detachably and fixedly connected to the installation cross beam.

Description

Technical Field

[0001] This utility model relates to an electric excavator, and more specifically, to a tractor-mounted excavator and its chassis. Background Technology

[0002] In the mining process of large open-pit mines, some large mechanical equipment, such as electric towed excavators, uses electricity as their power source. The power supply for these devices is usually provided by a fixed power source via cable. In actual operation, electric towed excavators need to move within the mining area, which requires a device that can flexibly adjust the power supply line as the excavator moves. Currently, the existing method for lower-level cable entry for electric towed excavators is as follows: a cable trolley is placed in a fixed position near the excavator, on which a cable reel is mounted. One end of the cable on the cable trolley is connected to the fixed power source, and the other end is pulled out from the cable entry bracket under the excavator's traveling frame and introduced into the excavator. This design can meet the excavator's mobility needs within a certain range to some extent and ensure the continuity of power supply, but it has some shortcomings. For example, since the cable trolley is an independent device, it needs to be transported separately when the excavator changes sites, but its weight and size are large, making it inconvenient to move in scenarios where site changes are frequent; the cable trolley needs to be placed on flat and unobstructed ground, and it is not very adaptable to complex or uneven terrain; when the excavator moves within its working range, it will pull on the cable, causing the cable trolley to swing with the cable, resulting in insufficient stability and safety; in order to facilitate movement and steering, the cable trolley is often equipped with a traveling mechanism and a slewing bearing, which increases manufacturing costs. Utility Model Content

[0003] The technical problem to be solved by this utility model is the inadequacy of existing electric excavators equipped with cable trolleys, and a new electric excavator and its chassis are provided.

[0004] The technical solution of this utility model to achieve its purpose is: a chassis for an electric excavator, including a traveling frame and track beams arranged on the left and right sides of the traveling frame, and further including a cable reel bracket and a mounting seat for mounting the cable reel bracket. The mounting seat includes mounting crossbeams fixedly connected to the corresponding track beams on the left and right ends, and mounting longitudinal beams welded to the traveling frame and the mounting crossbeams at the front and rear ends respectively. The end of the cable reel bracket is detachably fixed to the mounting crossbeam by bolts.

[0005] In the chassis of this electric tractor excavator, there is one mounting longitudinal beam located at the mid-surface of the traveling frame, or there are two mounting longitudinal beams arranged symmetrically about the mid-surface of the traveling frame. The mounting longitudinal beams and mounting crossbeams are arranged in a T-shape or a π-shape.

[0006] In the chassis of the electric tractor excavator of this utility model, the mounting longitudinal beam is an I-beam structure or a square tubular structure.

[0007] In the chassis of the electric tractor excavator of this utility model, the traveling frame includes a vertical side plate, an upper cover plate and a bottom plate that are correspondingly arranged above and below the vertical side plate and welded to the vertical side plate, and the end of the mounting longitudinal beam is welded to the vertical side plate, the upper cover plate and the bottom plate at the same time.

[0008] In the chassis of the electric tractor excavator of this utility model, the bottom surface of the end of the mounting longitudinal beam rests on the upper side of the base plate.

[0009] In the chassis of the electric tractor excavator of this utility model, the end of the mounting longitudinal beam is provided with a cover plate embedding groove for the edge of the upper cover plate to be embedded and welded.

[0010] In the chassis of this electric tractor excavator, both ends of the mounting beam are welded to the guide wheel mounting ends of the track beam.

[0011] In the chassis of the electric tractor excavator of this utility model, the cable reel support includes two parallel longitudinal support beams and multiple cross beams with their ends welded to the two longitudinal support beams; the cross beams are square tubular structures or channel steel structures, and the cross beams at one end of the cable reel support are attached to the cross beams and connected by bolts.

[0012] In the chassis of the electric tractor excavator of this utility model, a connecting plate is fixed on the support crossbeam and directed to the top of the mounting crossbeam. The connecting plate is attached to the top surface of the mounting crossbeam and fixedly connected by bolts.

[0013] The technical solution of this utility model to achieve its purpose is: an electric tractor excavator having the aforementioned electric tractor excavator chassis.

[0014] Compared with the prior art, in this utility model, the cable reel bracket is fixed to the excavator chassis and moves with the chassis without touching the ground, which improves the adaptability to the site, the stability and safety of the equipment, and greatly reduces the cost. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of the chassis of the electric excavator of this utility model.

[0016] Figure 2 This is a schematic diagram of the connection structure of the walking frame, track beam and mounting base in the chassis of the electric tractor excavator of this utility model.

[0017] Figure 3 This is an exploded view of the walking frame, track beams, and mounting base of the electric tractor chassis of this utility model.

[0018] Figure 4This is a schematic diagram of the cable reel support in the chassis of the electric excavator of this utility model.

[0019] Component names and serial numbers in the diagram:

[0020] 10. Cable reel, 21. Track beam, 22. Walking frame, 23. Top cover plate, 24. Bottom plate, 25. Vertical side plate, 30. Cable reel bracket, 31. Support longitudinal beam, 32. Support cross beam, 33. Connecting plate, 40. Mounting seat, 41. Mounting cross beam, 42. Mounting longitudinal beam, 43. Cover plate embedding groove. Detailed Implementation

[0021] The specific implementation plan is described below with reference to the attached diagram.

[0022] like Figure 1 As shown, the chassis of the electric excavator includes a traveling frame 22 and track beams 21 arranged on the left and right sides of the traveling frame 22. It also includes a mounting base 40 and a cable reel bracket 30. The mounting base 40 includes a mounting crossbeam 41 fixedly connected to the corresponding track beams 21 at both ends on the left and right sides, and a mounting longitudinal beam 42 welded to the traveling frame 22 and the mounting crossbeam 41 at both ends on the front and rear sides. The cable reel bracket 30 is detachably fixed to the mounting crossbeam 41 by bolts.

[0023] Optionally, in this embodiment, there are two mounting longitudinal beams 42 arranged symmetrically about the mid-surface of the traveling frame 22, and the mounting longitudinal beams 42 and the mounting crossbeams 41 are arranged in a π-shape. In some other embodiments, there may be only one mounting longitudinal beam located at the mid-surface of the traveling frame, and the mounting longitudinal beam and the mounting crossbeam are arranged in a T-shape. In this embodiment, the mounting base 40 is T-shaped or π-shaped and supported on the track beam 21 by the mounting crossbeams 41, forming a stable simply supported beam structure. After the cable reel bracket 30 is installed, the cantilever structure consists only of the cable reel bracket 30, reducing the cantilever length of the cantilever structure formed by the cable reel bracket 30 on the chassis and lowering the strength requirements. In addition, the cable reel bracket 30 can be disassembled when the electric excavator is transported and moved, thereby reducing the length of the chassis and facilitating transportation.

[0024] Optionally, the mounting beam 42 is a square tubular structure; in other embodiments, the mounting beam 42 can also be an I-beam structure. For example... Figure 2 Figure 3 As shown, the traveling frame 22 includes a vertical side plate 25, an upper cover plate 23 and a bottom plate 24 correspondingly arranged at the upper and lower ends of the vertical side plate 25 and welded thereto. The end of the mounting longitudinal beam 42 is simultaneously welded to the vertical side plate 25, the upper cover plate 23 and the bottom plate 24. Figure 3As shown, the traveling frame 22 is welded together from an upper cover plate 23, a base plate 24, and multiple vertical side plates 25. A supporting cylinder for supporting the slewing bearing is also welded to its center. The bottom surface of the end of the mounting longitudinal beam 42 rests on and is welded to the upper side of the base plate 24. Near the upper side of the end of the mounting longitudinal beam 42, a cover plate embedding groove 43 is provided for the edge of the upper cover plate 23 to be embedded and welded. The edge of the upper cover plate 23 opposite to the mounting seat 40 is embedded in the cover plate embedding groove 43 and welded to the mounting longitudinal beam 42. This design enhances the weld connection strength between the mounting longitudinal beam 42 and the traveling frame 22.

[0025] Optionally, both ends of the mounting beam 41 are welded to the guide wheel mounting ends of the track beam 21. A travel motor and a guide wheel are respectively mounted at both ends of the track beam 21, with the travel motor mounted on the side of the track beam end. Welding to the end of the mounting beam 41 is more convenient on the inner side of the guide wheel mounting end of the track beam.

[0026] Optionally, such as Figure 4 As shown, the cable reel support 30 includes two parallel longitudinal beams 31 and multiple transverse beams 32, each welded to one of the longitudinal beams at both ends. The transverse beams 41 are square tubular structures; in other embodiments, they can also be channel steel structures. The transverse beam 32 at one end of the cable reel support 30 is attached to the transverse beam 41 and connected by bolts. Further, a connecting plate 33 is fixed to the top of the transverse beam 32 at the end of the cable reel support 30, and the connecting plate 33 is attached to the top surface of the transverse beam 41 and fixedly connected by bolts. The transverse beam 32 can be square tubular, flat, or channel steel structure.

[0027] This embodiment also provides an electric excavator, which has the aforementioned electric excavator chassis. A cable reel 10 is installed on the cable reel bracket 30 on the chassis. The cable reel 10 can retract and extend the cable when the excavator moves, avoiding the cable that provides power to the electric excavator from dragging and rubbing on the ground.

[0028] In this embodiment, the cable reel bracket 30 is fixed to the excavator chassis and moves with the chassis without touching the ground, which improves the adaptability to the site, the stability and safety of the cable reel bracket installed on the power equipment, and greatly reduces the cost.

Claims

1. A chassis for an electric tractor-trailer, comprising a traveling frame and track beams arranged on the left and right sides of the traveling frame, characterized in that, It also includes a cable reel bracket and a mounting base for mounting the cable reel bracket. The mounting base includes a mounting crossbeam fixedly connected to the left and right ends of the corresponding side track beams, and mounting longitudinal beams welded to the front and rear ends of the traveling frame and the mounting crossbeams respectively. The end of the cable reel bracket is detachably fixed to the mounting crossbeam by bolts.

2. The chassis of the electric excavator according to claim 1, characterized in that, The mounting longitudinal beam is one and located at the mid-surface of the traveling frame, or the mounting longitudinal beam is two and the two mounting longitudinal beams are arranged in a mirror-symmetrical manner about the mid-surface of the traveling frame.

3. The chassis of the electric excavator according to claim 2, characterized in that, The mounting longitudinal beam is an I-beam structure or a square tubular structure.

4. The chassis of the electric excavator according to claim 1, characterized in that, The traveling frame includes a vertical side plate, an upper cover plate and a bottom plate that are correspondingly arranged above and below the vertical side plate and welded to the vertical side plate; the end of the mounting longitudinal beam is simultaneously welded to the vertical side plate, the upper cover plate and the bottom plate.

5. The chassis of the electric excavator according to claim 4, characterized in that, The bottom surface of the mounting longitudinal beam rests on the upper side of the base plate.

6. The chassis of the electric excavator according to claim 5, characterized in that, The end of the mounting longitudinal beam is provided with a cover plate embedding groove for the edge of the upper cover plate to be embedded and welded.

7. The chassis of an electric tractor excavator according to any one of claims 1 to 6, characterized in that, The two ends of the mounting beam are welded to the guide wheel mounting ends of the track beam.

8. The chassis of an electric tractor excavator according to any one of claims 1 to 6, characterized in that, The cable reel support includes two parallel longitudinal beams and multiple transverse beams, each with its ends welded to one of the longitudinal beams. The transverse beams are either square tubular or channel steel structures. The transverse beam at one end of the cable reel support is attached to the transverse beam and connected by bolts.

9. The chassis of the electric excavator according to claim 8, characterized in that, A connecting plate extending towards the top of the mounting beam is fixed on the support beam. The connecting plate is attached to the top surface of the mounting beam and fixedly connected by bolts.

10. An electric tractor excavator, characterized in that, It has the chassis of an electric excavator as described in any one of claims 1 to 9.

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