High-voltage cable protection structure of electric excavator

Abstract

The utility model discloses a high-voltage cable protection structure of an electric excavator, which belongs to the technical field of electric excavators and comprises a first pressing plate fixedly connected with a swivel joint, a first wire passing cylinder is fixedly arranged at the top of the first pressing plate and fixedly connected with one end of a protection pipe, and the other end of the protection pipe is fixedly connected with a second wire passing cylinder. The second wire passing cylinder is fixed to the side portion of the second pressing plate, and the two ends of the protection pipe are fastened through hoops.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric excavators, and in particular relates to a high-voltage cable protection structure for electric excavators. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] With the daily progress of new energy and electrification, the electrification of excavators is becoming more and more widely used. Compared with traditional fuel excavators, electric excavators require a high-voltage power supply to provide power for the entire vehicle. The external power supply requires a voltage of 380V. After conversion by the rectifier unit, the working voltage is as high as 600V. Electricity safety is an issue that must be paid attention to. In addition to the leakage protection measures of the entire vehicle, the waterproofing of high-voltage wiring harnesses and high-voltage components needs to be paid more attention.

[0004] At present, in the overall layout structure of electric excavators, the collector ring is directly connected to the rotary joint, and the high-voltage wire harness is connected to the rectifier unit through the rotary joint to complete the entry of high-voltage current. There is no shielding cover above the rotary joint of the whole machine, and the high-voltage wire harness is directly exposed to the outside. If there is heavy rain, rainwater will penetrate into the collector ring through the outlet. Although the collector ring has waterproof protection, the continuous entry of rainwater will still cause corrosion and other damage to the collector ring; in addition, the working conditions of the excavator are relatively harsh, and the integrity of the wire harness jacket cannot be guaranteed after long-term work. If the wire harness jacket is damaged, it is easy to cause leakage accidents. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a high-voltage cable protection structure for an electric excavator, which can protect the high-voltage wire harness connected to the swivel joint and prevent it from being worn.

[0006] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] In the first aspect, the utility model provides a high-voltage cable protection structure for an electric excavator, including a first pressure plate fixedly connected to a swivel joint, a first wire barrel fixedly arranged on the top of the first pressure plate, the first wire barrel fixedly connected to one end of a protective tube, the other end of the protective tube fixedly connected to a second wire barrel, the second wire barrel fixed to the side of the second pressure plate, and both ends of the protective tube are fastened by clamps.

[0008] As a further technical solution, the first pressure plate is fixed to the top of the swivel joint, the swivel joint is fixed to the platform bottom plate, the platform main beam is fixed to the side of the platform bottom plate, and the second pressure plate is fixed to the side of the platform main beam.

[0009] As a further technical solution, a clamping plate is arranged on the top of the swivel joint, the clamping plate is fixed to the top of the first pressure plate, the clamping plate is extended outward from the connection with the first pressure plate, and the extended end of the clamping plate is fixedly connected to the limit plate.

[0010] As a further technical solution, the card plate is arranged as a Y-shaped structure, the card plate is arranged horizontally, the limit plate is arranged vertically, and the bottom of the limit plate is fixed to the upper surface of the platform bottom plate.

[0011] As a further technical solution, rubber sheaths are provided at the ends of the first wire passing barrel and the second wire passing barrel.

[0012] As a further technical solution, the first pressing plate is arranged horizontally, and the second pressing plate is arranged vertically.

[0013] As a further technical solution, the first pressing plate and the second pressing plate are both planar plate structures.

[0014] As a further technical solution, a hole is opened in the middle of the first pressing plate, and the first wire passing barrel is fixed at the hole in the middle of the first pressing plate.

[0015] As a further technical solution, a hole is opened in the middle of the second pressing plate, and the second wire passing barrel is fixed at the hole in the middle of the second pressing plate.

[0016] As a further technical solution, the protective tube is a corrugated tube.

[0017] The beneficial effects of the above utility model are as follows:

[0018] The utility model discloses a high-voltage cable protection structure for an electric excavator, wherein two ends of a protection tube are respectively connected to a first wire barrel on a first pressure plate and a second wire barrel on a second pressure plate, and the first pressure plate is fixed to a swivel joint, whereby a high-voltage wire harness connected with the swivel joint can enter the protection tube through the first wire barrel, and then pass through the second wire barrel and the second pressure plate and be connected to a rectifier unit, thereby preventing the high-voltage wire harness from leaking out, protecting the high-voltage wire harness, avoiding wear of the high-voltage wire harness, and ensuring the integrity of the high-voltage wire harness itself, thereby avoiding the occurrence of leakage accidents.

[0019] The utility model discloses a high-voltage cable protection structure for an electric excavator, wherein the first pressure plate is fixed to the top of the rotary joint, and the collector ring is fixed to the bottom of the rotary joint, thereby preventing rainwater from entering the collector ring through the rotary joint and preventing the collector ring from being corroded.

[0020] In the utility model of the electric excavator high-voltage cable protection structure, both ends of the protection tube are fastened by clamps. When the protection tube is damaged, the clamp can be removed so as to replace a new protection tube in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0022] Figure 1 It is a schematic diagram of a high-voltage cable protection structure of an electric excavator according to one or more embodiments of the utility model;

[0023] Figure 2 It is a schematic diagram of the cooperation between the first pressing plate and the first wire-passing barrel according to one or more embodiments of the utility model;

[0024] Figure 3 It is a schematic diagram of the cooperation between the second pressing plate and the second wire-passing barrel according to one or more embodiments of the present invention;

[0025] Figure 4 It is a schematic diagram of the arrangement of a rubber sheath on a wire-passing drum according to one or more embodiments of the utility model;

[0026] In the figure: 1. first pressure plate, 2. second pressure plate, 3. protective tube, 4. clamp, 5. swivel joint, 6. first wire barrel, 7. second wire barrel, 8. platform bottom plate, 9. platform main beam, 10. rubber sheath, 11. clamp, 12. limit plate.

[0027] In order to show the positions of various parts, the distances or sizes between them are exaggerated and the schematic diagram is for reference only. DETAILED DESCRIPTION

[0028] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0029] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or their combinations;

[0030] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0031] Terminology explanation section: If the terms "install", "connect", "connect", "fixed" and so on appear in the present invention, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0032] In a typical implementation of the present invention, Figure 1 As shown, a high-voltage cable protection structure for an electric excavator is proposed, which includes a first pressing plate 1, a second pressing plate 2, a protective tube 3, a clamp 4, etc. The protective tube 3 is connected between the first pressing plate 1 and the second pressing plate 2, and both ends of the protective tube 3 are fastened by the clamp 4.

[0033] Among them, the first pressure plate 1 is fixed to the top of the swivel joint 5, the swivel joint 5 is fixed to the platform bottom plate 8 of the electric excavator complete machine platform, and the platform main beam 9 is fixedly arranged on the side of the platform bottom plate 8. The platform bottom plate and the platform main beam are existing known structures of the electric excavator complete machine platform.

[0034] The second pressure plate 2 is fixed to the side of the platform main beam 9 , and the second pressure plate 2 can be fixedly connected to the side wall of the platform main beam 9 by bolts and other connecting parts.

[0035] The first pressing plate 1 is arranged horizontally, and the first wire passing barrel 6 is fixedly arranged on the top of the first pressing plate 1; the second pressing plate 2 is arranged vertically, and the second wire passing barrel 7 is fixedly arranged on the side of the second pressing plate 2; the first wire passing barrel 6 is connected to one end of the protective tube 3, and the other end of the protective tube 3 is connected to the second wire passing barrel 7.

[0036] Clamps 4 are fixedly arranged outside both ends of the protection tube 3 to fix the protection tube 3 and the first wire barrel 6 and the second wire barrel 7. If the protection tube is damaged, the clamps can be removed so that a new protection tube can be replaced at any time.

[0037] The first pressing plate 1 is a planar plate-shaped structure, and the first pressing plate 1 is fixed to the top surface of the swivel joint 5 .

[0038] The first pressing plate 1 has a hole in the middle, and a first wire barrel 6 is fixed at the hole in the middle of the first pressing plate 1 , so that the high-voltage wire harness connected to the rotary joint 5 can pass through the first wire barrel 6 and enter the protective tube 3 .

[0039] The second pressing plate 2 is a planar plate-like structure with a hole in the middle of the second pressing plate 2. The second wire barrel 7 is fixed at the hole in the middle of the second pressing plate 2 to allow the high-voltage wire harness to pass through the second wire barrel 7 and the second pressing plate 2. After passing through, the high-voltage wire harness is connected to the rectifier unit on the corresponding electric excavator platform.

[0040] In an optional embodiment, the protective tube 3 is a corrugated tube which is wrapped around the outside of the high-voltage wire harness.

[0041] Since the boom cylinder and traveling hydraulic pipelines are also arranged on the platform of the electric excavator, the hydraulic pipelines generally adopt hydraulic hard pipes, which may collide with the high-voltage wire harness after installation and arrangement. In this embodiment, the collision and wear of the high-voltage wire harness by the hydraulic hard pipe can be avoided by adding a protective pipe.

[0042] In a preferred embodiment, rubber sheaths 10 are provided at the ends of the first wire barrel 6 and the second wire barrel 7, which can protect the high-voltage wire harness and avoid wear of the high-voltage wire harness when the high-voltage wire harness is passed through the two wire barrels.

[0043] Furthermore, a card plate 11 is provided on the top of the swivel joint 5, and the card plate 11 is fixed on the top of the first pressure plate 1. The card plate 11 is arranged horizontally, and the card plate 11 is extended outward from the connection with the first pressure plate 1, and the extended end of the card plate 11 is fixedly connected to the limit plate 12, and the limit plate 12 is arranged vertically, and the bottom of the limit plate 12 is fixed to the upper surface of the platform bottom plate 8. In the specific setting, a card slot is provided on the top of the limit plate, and the extended end of the card plate is inserted into the card slot, and the two will not move relative to each other; the lower part of the swivel joint is placed under the platform bottom plate, and the lower part of the swivel joint will rotate. Due to the cooperation of the card plate and the limit plate, and the limit plate is fixed to the platform bottom plate, the upper part of the swivel joint will not rotate, thereby avoiding the high-voltage wire harness from being entangled due to rotation. The upper and lower parts of the swivel joint are rotatably connected, which is a prior art and will not be described here.

[0044] The clamping plate 11 is configured as a Y-shaped structure, which is connected to the first pressing plate 1 to provide an escape space for the first wire barrel 6 and the protective tube, and reserve an operating space for the installation and removal of the clamp.

[0045] The clamping plate 11 is provided with a plurality of connection holes, and the first pressing plate 1 is provided with the same number of connection holes. Bolts and other fasteners are passed through the connection holes of the clamping plate 11 and the first pressing plate 1 to achieve a fastened connection between the clamping plate 11 and the first pressing plate 1 .

[0046] The protective structure of the utility model is applied to the whole machine platform of the electric excavator. The swivel joint 5 passes through the mounting hole of the platform bottom plate 8. The bottom of the swivel joint 5 is connected to the collector ring. The top of the swivel joint 5 is connected to the rectifier unit through the high-voltage wire harness. The high-voltage wire harness is passed through the protective tube 3. The protective tube can protect the high-voltage wire harness from wear. At the same time, the first pressure plate is fixed to the top of the swivel joint to prevent rainwater from entering the collector ring through the swivel joint.

[0047] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A high-voltage cable protection structure for an electric excavator, characterized in that: It includes a first pressing plate fixedly connected to a swivel joint, a first wire passing cylinder is fixedly arranged on the top of the first pressing plate, the first wire passing cylinder is fixedly connected to one end of a protective tube, the other end of the protective tube is fixedly connected to a second wire passing cylinder, the second wire passing cylinder is fixed to the side of the second pressing plate, and both ends of the protective tube are fastened by clamps.

2. The electric excavator high voltage cable protection structure according to claim 1, characterized in that: The first pressure plate is fixed to the top of the swivel joint, the swivel joint is fixed to the platform bottom plate, the platform main beam is fixedly arranged on the side of the platform bottom plate, and the second pressure plate is fixed to the side of the platform main beam.

3. The electric excavator high voltage cable protection structure according to claim 2, characterized in that: A clamping plate is arranged on the top of the swivel joint, the clamping plate is fixed on the top of the first pressing plate, the clamping plate is extended outward from the connection with the first pressing plate, and the extended end of the clamping plate is fixedly connected with the limiting plate.

4. The electric excavator high voltage cable protection structure according to claim 3, characterized in that: The clamping plate is arranged in a Y-shaped structure, the clamping plate is arranged horizontally, the limiting plate is arranged vertically, and the bottom of the limiting plate is fixed to the upper surface of the platform bottom plate.

5. The electric excavator high voltage cable protection structure according to claim 1, characterized in that: The ends of the first wire-passing barrel and the second wire-passing barrel are both provided with rubber sheaths.

6. The electric excavator high voltage cable protection structure according to claim 1, characterized in that: The first pressing plate is arranged horizontally, and the second pressing plate is arranged vertically.

7. The electric excavator high voltage cable protection structure according to claim 1, characterized in that: The first pressing plate and the second pressing plate are both planar plate-shaped structures.

8. The electric excavator high voltage cable protection structure according to claim 1, characterized in that: The first pressing plate has a hole in the middle, and the first wire passing barrel is fixed at the hole in the middle of the first pressing plate.

9. The electric excavator high voltage cable protection structure according to claim 1, characterized in that: The second pressing plate has a hole in the middle, and the second wire passing barrel is fixed at the hole in the middle of the second pressing plate.

10. The electric excavator high voltage cable protection structure according to claim 1, characterized in that: The protective tube is a corrugated tube.

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