CN102561447B - High-low voltage power collector for electric forklift - Google Patents

Abstract

The invention discloses a high-voltage and low-voltage current collecting device for an electric forklift, which solves the technical problems in the prior art that the current collecting ring assembly is easy to wear locally, has poor conduction and large-area ablation. It includes the electric forklift tower, the central pivot of the electric forklift, the slip ring cabinet (1) and the slip ring assembly (2), and the upper rolling bearing seat (21) is arranged on the top plate of the slip ring cabinet (1) , the middle sliding bearing outer ring (4) is arranged on the intermediate partition, and the lower sliding bearing is arranged on the bottom plate; the brush holder installation assembly is arranged in the collector ring cabinet (1), and the collector ring assembly (2) The lower end of the collector ring assembly is fixedly provided with the lower rotating pin (6), and the mounting hole for the lower rotating pin (6) of the collector ring assembly is provided on the top end surface of the central pivot of the electric forklift. The collector ring cabinet (1 ) are fixed on the tower of the electric forklift. It is especially suitable for large-tonnage forklifts with a tonnage of more than 20 cubic meters.

Description

Electric forklift high and low voltage current collectors

technical field

The invention relates to a power collecting device, in particular to a high-voltage and low-voltage power collecting device used on a large-scale electric forklift. The device is used for high-voltage power transmission of the upper tower control room of the electric forklift, power supply of the lower traveling motor and control circuit power supply.

Background technique

On a large electric forklift, the power and control center of the collector box is directly connected to the tower of the electric forklift, and a brush holder and a collector ring assembly are arranged in the collector box, and the collector ring assembly is connected to the The central pivot on the electric forklift is directly connected together, the brush holder and the frame of the collector box are fixedly connected together, the brush holder and the collector box rotate with the rotation of the tower of the forklift, and the brush holder is always It is electrically connected with the collector ring assembly to complete the task of providing power for the forklift. During the walking or working process of the electric forklift, due to the bumping, impact or other reasons of the car body, there will often be swings, misalignments, etc. between the central pivot of the electric forklift and the tower of the electric forklift, resulting in Partial wear of slip ring components, poor electrical conductivity, and even large-area ablation, especially for large-tonnage forklifts, this phenomenon is more serious.

Contents of the invention

The invention provides a high-voltage and low-voltage current collecting device for an electric forklift, which solves the technical problems in the prior art that the current collector ring assembly is easy to wear locally, has poor electrical conduction, and has a large area of ablation.

The present invention solves the above technical problems through the following technical solutions:

A high-voltage and low-voltage power collection device for an electric forklift, including a tower for an electric forklift, a central pivot for an electric forklift, a collector ring cabinet and a collector ring assembly, and a low-voltage chamber is arranged on the upper part of the collector ring cabinet. A high-voltage chamber is arranged at the lower part of the collector ring cabinet, and an upper rolling bearing seat is fixedly arranged at the center of the top plate of the collector ring cabinet to hoist the collector ring assembly on the collector ring cabinet. The middle part of the outer ring of the sliding bearing is fixed at the center of the partition between the low-voltage chamber and the high-voltage chamber of the cabinet, and the lower outer ring of the sliding bearing is fixed at the center of the bottom plate of the collector ring cabinet; The upper rolling bearing is fixedly arranged at the top, the middle sliding bearing inner ring is fixedly arranged at the middle part of the central shaft of the collector ring assembly, and the lower sliding bearing inner ring is fixedly arranged at the bottom end of the central shaft of the collector ring assembly. Low-voltage collector rings are arranged at intervals between the upper rolling bearing and the inner ring of the middle sliding bearing, and high-voltage collector rings are arranged at intervals between the inner ring of the middle sliding bearing and the inner ring of the lower sliding bearing of the central shaft, and the collector ring assembly is movable Set in the upper rolling bearing seat, the middle sliding bearing outer ring and the lower sliding bearing outer ring, and the upper rolling bearing is set in the upper rolling bearing seat, the middle sliding bearing inner ring is set in the middle sliding bearing outer ring, and the lower sliding bearing inner ring is set in In the outer ring of the lower sliding bearing; the low-pressure chamber brush holder installation assembly is arranged in the low-voltage chamber, the high-voltage chamber brush holder installation assembly is arranged in the high-voltage chamber, and the lower part of the collector ring assembly is fixed at the bottom of the collector ring assembly. Pin, on the top end surface of the central pivot of the electric forklift, there is a mounting hole for the rotating pin of the lower part of the collector ring assembly, and the rotating pin of the lower part of the collector ring The electric ring assembly rotates with the rotation of the central pivot of the electric forklift. A cabinet fixing plate is fixed at the lower end of the collector ring cabinet. The cabinet fixing bolts connect the collector ring cabinet through the screw holes on the cabinet fixing plate. It is fixed on the tower of the electric forklift.

A flexible damping sleeve is provided in the installation hole of the lower rotating pin of the collector ring assembly provided on the top end surface of the central pivot of the electric forklift. The inner diameter of the flexible damping sleeve is 2 times larger than the diameter of the lower rotating pin of the collector ring assembly. -5 mm.

When installing the current collector, ensure that the center of the lower rotating pin is consistent with the center of the mounting hole of the lower rotating pin of the collector ring assembly provided on the top end surface of the central pivot, and that the top end surface of the central pivot of the electric forklift is in line with the current collector. The end surface of the lower part of the ring assembly is guaranteed to have a gap of 15-25mm, which is used to eliminate or accommodate the influence of inclination, misalignment, etc. when the electric shovel is walking or working, so as not to cause rigid collision between the two parts and damage the collector ring device.

The upper rolling bearing is connected with the upper rolling bearing lubricating system, the middle sliding bearing outer ring is provided with the middle sliding bearing lubrication system, the lower sliding bearing outer ring is provided with the lower sliding bearing lubrication system; the upper rolling bearing seats are respectively provided with rolling bearing lower seals Ring and rolling bearing fastening nuts.

The invention isolates the current collecting device of the high-voltage chamber from the current collecting device of the low-voltage chamber to ensure the safety of the equipment; the rigid hard connection between the collector ring assembly and the central pivot of the electric forklift is changed into a flexible drive, which overcomes the problem of current collection It is especially suitable for large-tonnage forklifts with a tonnage of more than 20 cubic meters.

Description of drawings

Fig. 1 is a structural representation of the present invention;

FIG. 2 is a schematic structural view of the slip ring assembly 2 of the present invention.

Detailed ways

A high-voltage and low-voltage power collection device for an electric forklift, including a tower frame for an electric forklift, a central pivot for an electric forklift, a collector ring cabinet 1 and a collector ring assembly 2, and the upper part of the collector ring cabinet 1 is provided with The low-voltage chamber 15 is provided with a high-voltage chamber 14 at the lower part of the collector ring cabinet body 1, and an upper rolling bearing seat 21 is fixedly arranged at the center of the top plate of the collector ring cabinet body 1, and the collector ring assembly 2 is installed on the upper rolling bearing seat 21 The upper rolling bearing 5 is hoisted on the top plate of the slip ring cabinet 1. A middle sliding bearing outer ring 4 is fixed at the center of the partition between the low-voltage chamber 15 and the high-voltage chamber 14 of the collector ring cabinet 1, and the lower sliding bearing outer ring 3 is fixed at the center of the bottom plate of the collector ring cabinet 1. The top of the central shaft 22 of the slip ring assembly 2 is fixedly provided with an upper rolling bearing 5, and the middle part of the central shaft 22 of the slip ring assembly 2 is fixedly provided with a middle sliding bearing inner ring 17, and in the middle of the slip ring assembly 2 The bottom end of the shaft 22 is fixedly provided with a lower sliding bearing inner ring 16, and a low-voltage collector ring 19 is arranged at intervals between the upper rolling bearing 5 of the central shaft 22 and the middle sliding bearing inner ring 17, and the middle sliding bearing of the central shaft 22 A high-voltage collector ring 18 is arranged at intervals between the inner ring 17 and the lower sliding bearing inner ring 16, and the collector ring assembly 2 is movably arranged in the upper rolling bearing seat 21, the middle sliding bearing outer ring 4 and the lower sliding bearing outer ring 3, And the upper rolling bearing 5 is arranged in the upper rolling bearing housing 21, the middle sliding bearing inner ring 17 is arranged in the middle sliding bearing outer ring 4, and the lower sliding bearing inner ring 16 is arranged in the lower sliding bearing outer ring 3, so that the slip ring assembly 2 Relative to the collector ring cabinet body 1, it can move up and down; a low-voltage chamber brush holder installation assembly 8 is arranged in the low-voltage chamber 15, a high-voltage chamber brush holder installation assembly 9 is arranged in the high-voltage chamber 14, and the bottom end of the collector ring assembly 2 The lower rotating pin 6 of the collector ring assembly is fixedly arranged, and the mounting hole for the lower rotating pin 6 of the collector ring assembly is provided on the top end surface of the central pivot of the electric forklift, and the lower rotating pin 6 of the collector ring assembly is movably arranged on the collector In the installation hole of the rotating pin 6 at the lower part of the ring assembly, the collector ring assembly 2 is rotated following the rotation of the central pivot of the electric forklift, and a cabinet fixing plate 7 is fixedly arranged on the lower end of the collector ring cabinet body 1, and the cabinet body is fixed. Bolts pass through the screw holes 13 on the cabinet fixing plate 7 to fix the collector ring cabinet 1 on the tower of the electric forklift.

A flexible damping bushing is arranged in the installation hole of the lower rotating pin 6 of the collector ring assembly provided on the top end face of the central pivot of the electric forklift, and the inner diameter of the flexible damping bushing is smaller than the diameter of the lower rotating pin 6 of the collector ring assembly. 2-5 mm larger. In this way, the connection between the collector ring assembly and the central pivot of the electric forklift has great flexibility, thereby offsetting the swing between the central pivot of the electric forklift and the tower and the difference between the collector ring assembly and the brush holder. The effect of cooperation avoids the large area ablation of the collector ring. There should be a clearance of not less than 15 mm between the bottom end of the slip ring assembly and the top end of the center pivot.

The upper rolling bearing 5 is connected with the upper rolling bearing lubrication system 12, the middle sliding bearing outer ring 4 is provided with the middle sliding bearing lubrication system 11, the lower sliding bearing outer ring 3 is provided with the lower sliding bearing lubrication system 10; the upper rolling bearing housing 21 The lower sealing ring 20 of the rolling bearing and the fastening nut 23 of the rolling bearing are respectively arranged on the top. These lubricating systems improve the friction performance during relative motion between the collector ring assembly and the collector ring cabinet, prolonging the service life of the collector device.

Claims (3)

1. A high-voltage and low-voltage power collection device for an electric forklift, including a tower for an electric forklift, a central pivot for an electric forklift, a collector ring cabinet (1) and a collector ring assembly (2). The upper part of the body (1) is provided with a low-voltage chamber (15), and the lower part of the collector ring cabinet (1) is provided with a high-voltage chamber (14), which is characterized in that at the center of the top plate of the collector ring cabinet (1) The upper rolling bearing seat (21) is fixedly installed, and the middle sliding bearing outer ring (4) is fixedly installed at the center of the partition between the low-voltage chamber (15) and the high-voltage chamber (14) of the collector ring cabinet (1). The lower sliding bearing outer ring (3) is fixedly arranged at the center of the bottom plate of the electric ring cabinet body (1); the upper rolling bearing (5) is fixedly arranged on the top of the center shaft (22) of the collector ring assembly (2), The middle part of the center shaft (22) of the electric ring assembly (2) is fixedly provided with a middle sliding bearing inner ring (17), and the bottom end of the center shaft (22) of the collector ring assembly (2) is fixedly provided with a lower sliding bearing inner ring. Ring (16), low-voltage collector rings (19) are arranged at intervals between the upper rolling bearing (5) of the central shaft (22) and the inner ring (17) of the middle sliding bearing, and the middle sliding bearing of the central shaft (22) High-voltage collector rings (18) are arranged at intervals between the inner ring (17) and the inner ring of the lower sliding bearing (16), and the collector ring assembly (2) is movably arranged on the upper rolling bearing housing (21) and the outer ring of the middle sliding bearing. (4) and the lower sliding bearing outer ring (3), and the upper rolling bearing (5) is set in the upper rolling bearing seat (21), and the middle sliding bearing inner ring (17) is set in the middle sliding bearing outer ring (4), The lower sliding bearing inner ring (16) is arranged in the lower sliding bearing outer ring (3); the low-pressure chamber brush holder installation assembly (8) is arranged in the low-pressure chamber (15), and the high-pressure chamber is arranged in the high-pressure chamber (14) The brush holder installation assembly (9) is fixed with the lower rotating pin (6) of the collector ring assembly (6) at the bottom of the collector ring assembly (2), and the collector ring assembly is arranged on the top end surface of the central pivot of the electric forklift The installation hole of the lower rotating pin (6), the lower rotating pin (6) of the collector ring assembly is movably set in the installation hole of the lower rotating pin (6) of the collector ring assembly, so that the collector ring assembly (2) follows the electric forklift The rotation of the central pivot rotates, and the lower end of the collector ring cabinet (1) is fixed with a cabinet fixing plate (7), and the cabinet fixing bolts pass through the screw holes (13) on the cabinet fixing plate (7). The collector ring cabinet (1) is fixedly arranged on the tower of the electric forklift. 2. A high-voltage and low-voltage power collection device for an electric forklift according to claim 1, characterized in that the installation of the rotating pin (6) at the lower part of the collector ring assembly provided on the top end surface of the central pivot of the electric forklift A flexible damping bushing is arranged in the hole, and the inner diameter of the flexible damping bushing is 2-5 millimeters larger than the diameter of the rotating pin (6) at the bottom of the collector ring assembly. 3. A high-voltage and low-voltage power collection device for electric forklift according to claim 1 or 2, characterized in that the upper rolling bearing (5) is connected with an upper rolling bearing lubrication system (12), and the outer ring of the sliding bearing in the middle (4 ) is provided with a middle sliding bearing lubrication system (11), the lower sliding bearing outer ring (3) is provided with a lower sliding bearing lubrication system (10); the upper rolling bearing seat (21) is respectively provided with a rolling bearing lower sealing ring ( 20) and the rolling bearing fastening nut (23).

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