CN212202052U

CN212202052U - Telescopic arm

Info

Publication number: CN212202052U
Application number: CN202020702510.4U
Authority: CN
Inventors: 贾体锋; 赵兴寅; 杜祥虎; 梁凤远; 郭铁坤
Original assignee: Xuzhou XCMG Railway Equipment Co Ltd
Current assignee: Xuzhou XCMG Railway Equipment Co Ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-12-22
Anticipated expiration: 2030-04-30

Abstract

The utility model discloses a telescopic boom, including trailing arm, forearm and flexible hydro-cylinder, the trailing arm is the cavity structure, and the forearm includes supporting part and embedding portion, and the supporting part bottom surface sets up and leaves the space with embedding portion upper surface level, and embedding portion is the cavity structure, and embedding portion cover is located in the trailing arm cavity. The telescopic oil cylinder is arranged in the rear arm cavity, one end of the cylinder body is fixedly connected with the rear arm, and the cylinder rod of the telescopic oil cylinder extends into the front arm cavity and is fixedly connected with the front arm. The structure can conveniently increase the working range of the telescopic arm and reduce the occupied space of the equipment.

Description

Telescopic arm

Technical Field

The utility model relates to a tunnel construction equipment technical field, concretely relates to flexible arm.

Background

In the underground excavation construction of the subway, the process comprises the working procedures of tunneling, deslagging, supporting and the like; wherein, a lower groove and a side groove are required to be opened before the arch frame supporting process, and the tunneling process is required to finish the removal of the upper soil, the core soil, the lower soil and the like in sequence. The excavation surface is an arch surface, excavation is carried out along the arch surface in the depth direction, excavation is carried out from the upper part of the arch surface, namely, upper soil, then excavation is carried out on soil in the middle part, namely, core soil, and finally excavation is carried out on the lowest soil, namely, lower soil. Therefore, most of geology is clay and sandy cobble geology by applying the construction method, and the tunneling and side grooving processes are generally performed by a digging arm with the excavating capacity. At present, the construction of underground excavation of the subway is carried out, in order to meet the construction requirements in narrow and small sections, the length of an excavating arm used by common equipment is short or an excavator is directly used for operation. The excavation operation of the soil above cannot be directly finished due to the short length, the circulating footage is short, and the working efficiency is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a flexible arm, it can realize freely stretching out and drawing back of flexible arm to acquire bigger control range.

In order to achieve the purpose, the telescopic boom comprises a rear boom, a front boom and a telescopic oil cylinder, wherein the rear boom is of a cavity structure, the front boom comprises a supporting part and an embedded part, the bottom surface of the supporting part is horizontally arranged with the upper surface of the embedded part, a gap is reserved between the bottom surface of the supporting part and the upper surface of the embedded part, the embedded part is of a cavity structure, and the embedded part is sleeved in the cavity of the rear boom; the telescopic oil cylinder is arranged in the rear arm cavity, one end of the cylinder body is fixedly connected with the rear arm, and the cylinder rod of the telescopic oil cylinder extends into the front arm cavity and is fixedly connected with the front arm.

Furthermore, the two side faces of one end of the supporting part are provided with sliding blocks, the corresponding positions of the two sides of the rear arm are provided with sliding ways, and the sliding blocks slide on the sliding ways in a reciprocating mode.

Further, the cross section of the rear arm is rectangular, and the cross section of the embedding part is rectangular.

Furthermore, forearm sliding plates are arranged on the upper surface, the lower surface and two side surfaces of the opening end of the forearm.

Furthermore, a first rear arm sliding plate is arranged on the upper surface and the lower surface of the opening end of the rear arm, and second rear arm sliding plates are arranged on the two side surfaces.

Furthermore, the second sliding plate is of a cylindrical structure, an end cover is arranged on the rear arm, the second sliding plate is partially embedded in the end cover, and the sliding plate is fastened on the rear arm through a bolt on the end cover so as to be in contact with the front arm.

Furthermore, a through hole is formed in the middle of the second rear arm sliding plate, and a grease nipple is installed in the middle of the end cover.

Furthermore, first back arm slide is the rectangular plate, and the oil groove has been seted up to the centre and front arm contact surface, has seted up the grease nipple on the back arm that first back arm slide was located.

Further, a gasket is arranged between the end cover and the second rear arm sliding plate; a gasket is arranged between the rear arm and the first rear arm sliding plate.

Further, the front arm sliding plate, the first rear arm sliding plate and the second rear arm sliding plate are made of nylon plates or copper plates.

The utility model has the advantages that: the telescopic arm is set as the front arm and the rear arm, wherein the front arm can slide on the rear arm in a reciprocating manner, so that the arm length of the telescopic arm can be extended, and the telescopic arm can be conveniently and freely extended in a narrow limited space.

Drawings

FIG. 1 is a schematic view of the overall structure of a telescopic boom;

FIG. 2 is a horizontal cross-sectional view of the telescoping arm;

FIG. 3 is a vertical cross-sectional view of the telescoping arm;

FIG. 4 is a rear arm elevational view;

FIG. 5 is a top view of the rear arm;

FIG. 6 is a front elevational view of the forearm;

FIG. 7 is a top view of the forearm;

FIG. 8 is a left side view of FIG. 1;

3 FIG. 3 9 3 is 3 a 3 sectional 3 view 3 taken 3 along 3 line 3 A 3- 3 A 3 of 3 FIG. 3 1 3; 3

In the figure, 1-rear arm, 2-front arm, 21-supporting part, 22-embedding part, 3-telescopic oil cylinder, 4-sliding block, 5-slideway, 6-front arm sliding plate, 7-first rear arm sliding plate, 8-second rear arm sliding plate, 9, end cover, 10-grease nipple, 11-cylinder body shaft sleeve and 12-cylinder rod shaft sleeve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in fig. 1 to 9, the telescopic boom of the present embodiment is applied to a subsurface excavation trolley, and includes a rear boom 1, a front boom 2 and a telescopic cylinder 3, where the rear boom 1 is a hollow structure, the front boom 2 includes a support portion 21 and an embedded portion 22, and the support portion 21 is mainly used for supporting a dump bucket cylinder. The front arm 2 is connected with a bucket of the underground excavation trolley. The bottom surface of the supporting part 21 and the upper surface of the embedding part 22 are horizontally arranged and leave a gap, the embedding part 22 is a cavity structure, and the embedding part 22 is sleeved in the cavity of the rear arm 1. As shown in fig. 2-3, the telescopic oil cylinder 3 is arranged in the cavity of the rear arm 1, one end of the cylinder body is fixedly connected with the rear arm 1, and the connection point is arranged at the shaft sleeve 11 of the cylinder body. The cylinder rod extends into the cavity of the front arm 2 and is fixedly connected with the front arm 2, and the connection point of the cylinder rod is arranged at the cylinder rod shaft sleeve 12.

As shown in fig. 1 and 8, the two side surfaces of one end of the supporting part 21 are provided with sliding blocks 4, the corresponding positions of the two sides of the rear arm 1 are provided with sliding ways 5, and the sliding blocks 4 slide on the sliding ways 5 in a reciprocating manner. Both sides of the telescopic arm are provided with a slide block 4 and a slide way 5, and a nylon block is arranged between the slide block and the slide way. The purpose of setting up slider 4 and slide 5 is because the front end of flexible arm needs to be connected with actuating mechanism such as scraper bowl and scraper bowl jar, and the lower surface of supporting part 21 is equipped with the nylon slider, with rear arm upper surface contact, when the scraper bowl excavation operation, the scraper bowl hydro-cylinder provides the power that presses to the rear arm upper surface to the supporting part, and when the scraper bowl was backward supported, the scraper bowl can produce and make the supporting part keep away from the reaction force of rear arm upper surface, and through slider 4 and slide 5 combined action this moment, prevent that supporting part 21 from warping and tearing.

The rear arm 1 is rectangular in cross section and the insert portion 22 is rectangular in cross section. Of course, the cross-section of the rear arm and the cross-section of the insertion portion may be circular. The upper and lower surfaces and two side surfaces at the opening end of the front arm are provided with front arm sliding plates 6. This makes the contact movement of the open end of the front arm 2 with the inner wall of the rear arm smoother. The upper and lower surfaces of the opening end of the rear arm 1 are provided with a first rear arm sliding plate 7, and the two side surfaces are provided with a second rear arm sliding plate 8. The arm body of the rear arm is provided with a rectangular opening which is the same as the first rear arm 7 in size, screw holes are formed in the periphery of the rectangular opening, the first rear arm sliding plate 7 is placed in the rectangular opening, an upper fixing plate is placed on the rectangular opening, and then the fixing plate is connected with the screw holes in the rear arm through bolts. The second rear arm sliding plate 8 is of a cylindrical structure, an end cover 9 is arranged on the rear arm 1, the second rear arm sliding plate 8 is partially embedded in the end cover 9, and the second rear arm sliding plate 8 is fastened on the rear arm through a bolt on the end cover 9 to be in contact with the outer surface of the front arm 2. A gasket is arranged between the end cover 9 and the second rear arm sliding plate 8; a spacer is provided between the rear arm 1 and the first rear arm slide 7. The pad can be adjusted to make the sliding plate contact with the forearm more tightly. The front arm sliding plate is arranged at the opening end of the front arm 2, the fixing mode is that a fixing plate is combined with a bolt, and a gasket can be added. The above structure facilitates replacement of the first rear arm slide 7 and the second rear arm slide 8. The first rear arm sliding plate 7 is a rectangular plate, an oil groove is arranged on the contact surface of the middle and the front arm 2, and a grease nipple 10 (not shown) is arranged on the rear arm where the first rear arm sliding plate 7 is located. A through hole is arranged in the middle of the second rear arm sliding plate 8, and a grease nipple 10 is arranged in the middle of the end cover. Preferably, the first rear arm slide 7, the second rear arm slide 8 and the front arm slide 6 are made of nylon or rubber.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes that can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those skilled in the art can be made within the scope of the claims of the present invention.

Claims

1. A telescopic boom, characterized in that: the telescopic oil cylinder is characterized by comprising a rear arm (1), a front arm (2) and a telescopic oil cylinder (3), wherein the rear arm (1) is of a cavity structure, the front arm (2) comprises a supporting part (21) and an embedded part (22), the bottom surface of the supporting part (21) is horizontally arranged with the upper surface of the embedded part (22) and a gap is reserved between the bottom surface of the supporting part and the upper surface of the embedded part (22), the embedded part (22) is of a cavity structure, and the embedded part (22) is sleeved in the cavity of the rear arm (1); the telescopic oil cylinder (3) is arranged in the cavity of the rear arm (1), one end of the cylinder body is fixedly connected with the rear arm (1), and the cylinder rod extends into the cavity of the front arm (2) and is fixedly connected with the front arm (2).

2. A telescopic arm according to claim 1, characterized in that: the supporting part is characterized in that sliding blocks (4) are arranged on two side faces of one end of the supporting part (21), sliding ways (5) are arranged at corresponding positions of two sides of the rear arm (1), and the sliding blocks (4) slide on the sliding ways (5) in a reciprocating mode.

3. A telescopic arm according to claim 1, characterized in that: the cross section of the rear arm (1) is rectangular, and the cross section of the embedding part (22) is rectangular.

4. A telescopic arm according to claim 3, characterized in that: the upper and lower surfaces and two side surfaces of the opening end of the front arm (2) are provided with front arm sliding plates (6).

5. A telescopic arm according to claim 4, characterized in that: a first rear arm sliding plate (7) is arranged on the upper surface and the lower surface of the opening end of the rear arm (1), and second rear arm sliding plates (8) are arranged on the two side surfaces; rectangular holes are formed in the upper surface and the lower surface of the opening end of the rear arm (1), and the first rear arm sliding plate (7) is placed and fixed in the rectangular holes.

6. A telescopic arm according to claim 5, characterized in that: first back arm slide (7) are the rectangular plate, and the oil groove has been seted up to the centre and forearm (2) contact surface, has seted up grease nipple (10) on the back arm that first back arm slide (7) were located.

7. A telescopic arm according to claim 5, characterized in that: rear arm (1) open end both sides face is equipped with second rear arm slide (8), is equipped with end cover (9) on rear arm (1), second rear arm slide (8) part embedding is in end cover (9), through the bolt-up on end cover (9) make second rear arm slide (8) with forearm (2) surface contact on the rear arm.

8. A telescopic arm according to claim 7, characterized in that: a through hole is formed in the middle of the second rear arm sliding plate (8), and a grease nipple (10) is installed in the middle of the end cover (9).

9. A telescopic arm according to claim 7, characterized in that: a gasket is arranged between the end cover (9) and the second rear arm sliding plate (8); a gasket is arranged between the rear arm (1) and the first rear arm sliding plate (7).

10. A telescopic arm according to claim 5, characterized in that: the front arm sliding plate (6), the first rear arm sliding plate (7) and the second rear arm sliding plate (8) are made of nylon plates or copper plates.