Three-stage telescopic boom of crane

Abstract

The utility model discloses a three-stage telescopic boom of a crane, which comprises a plurality of sections of telescopic booms and check blocks, the plurality of sections of telescopic booms are sleeved with one another and slide along the axial direction, the inner diameter of the front section of telescopic boom is larger than the outer diameter of the rear section of telescopic boom, each section of telescopic boom is provided with a check block, each check block is provided with a cleaning assembly, and the cleaning assemblies are arranged on the check blocks. The utility model relates to the technical field of telescopic booms of cranes, in particular to a telescopic boom of a crane, a mounting frame and a scraper blade are arranged on a stop block of each telescopic boom, when the telescopic boom stretches out and draws back, the scraper blade on the previous telescopic boom can scrape and clean the surface of the next telescopic boom, dust, sandy soil and other impurities are prevented from being adsorbed on the telescopic boom, and the service life of the telescopic boom is prolonged. The possibility that dust and impurities enter the telescopic arm is reduced, cleanliness of the telescopic arm is guaranteed, normal operation of the telescopic arm is further guaranteed, the mounting frame and the scraper can be detached, and later replacement and maintenance by workers are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of crane telescopic arms, in particular to a three-stage telescopic arm of a crane. Background Art

[0002] The telescopic arm of a crane is an important component of the crane, and is mainly used to realize the lifting and telescopic functions of the crane. The telescopic arm of a crane is generally composed of multiple arms, and each arm section is connected by a pin shaft, which can realize telescopic and folding.

[0003] At present, during the use of the three-stage telescopic arm of the crane, especially in outdoor environments, it will inevitably come into contact with dust, sand and other impurities in the air. These impurities may adhere to the surface of the telescopic arm. When the telescopic arm is extended or retracted, dust and impurities will be brought into the interior of the telescopic arm. These impurities may block the oil path, air holes or sliding surfaces inside the telescopic arm, resulting in poor movement of the telescopic arm or damage to key components. Utility Model Content

[0004] The utility model aims to provide a three-stage telescopic arm of a crane to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a three-stage telescopic arm of a crane, comprising a plurality of telescopic arms and a block, the plurality of telescopic arms are sleeved together and slide axially, the inner diameter of the telescopic arm of the previous section is larger than the outer diameter of the telescopic arm of the next section, each section of the telescopic arm is provided with a block, and the block is provided with a cleaning assembly, the cleaning assembly comprises a first connecting frame, a second connecting frame, a threaded sleeve, a bolt, two brackets and two scrapers, the first connecting frame and the second connecting frame are respectively movably sleeved on the block, and the first connecting frame and the second connecting frame are symmetrically arranged, the first connecting frame and the second connecting frame are both provided with through holes, the second connecting frame is provided with a threaded sleeve, and the position of the through hole corresponds to the position of the threaded sleeve, the bolts are respectively movably penetrated through the through holes of the first connecting frame and the second connecting frame and are connected to the threaded sleeve of the second connecting frame, the two brackets are respectively arranged on the front sides of the first connecting frame and the second connecting frame, and the two scrapers are respectively arranged on the inner walls of the two brackets.

[0006] Preferably, the two brackets form a rectangular frame, and the scraper on the inner wall of the bracket contacts the outer side of the telescopic arm described in the previous section.

[0007] Preferably, the number of the threaded sleeves and the number of the bolts are both two, the two threaded sleeves are respectively located on the upper and lower sides of the second connecting frame, and the two bolts are respectively located on the upper and lower sides of the first connecting frame.

[0008] Compared with the prior art, the utility model has the following beneficial effects: a mounting frame and a scraper are provided on the block of each telescopic arm of the utility model; when the telescopic arm is extending or retracting, the scraper on the previous telescopic arm will scrape and clean the surface of the subsequent telescopic arm to prevent dust, sand and other impurities from being adsorbed on the telescopic arm, and reduce the possibility of dust and impurities entering the interior of the telescopic arm, which not only ensures the cleanliness of the telescopic arm, but also further ensures the normal operation of the telescopic arm; and the mounting frame and the scraper can be disassembled, which is convenient for the staff to replace and maintain at a later time. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the axonometric structure of the utility model;

[0010] Figure 2 It is a schematic diagram of the prior art structure of a three-stage telescopic arm;

[0011] Figure 3 This is a schematic diagram of the axonometric structure of the cleaning component of the utility model in an installed state;

[0012] Figure 4 This is a schematic diagram of the axonometric structure of the cleaning component of the utility model in a disassembled state;

[0013] Figure 5 It is a schematic diagram of the axonometric structure of the first connecting frame of the utility model.

[0014] In the figure: 1, telescopic arm; 2, stopper; 3, cleaning assembly; 31, first connecting frame; 32, second connecting frame; 33, threaded sleeve; 34, bolt; 35, bracket; 36, scraper. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1-5The utility model provides a three-stage telescopic arm of a crane, including a multi-section telescopic arm 1 and a stopper 2. The multi-section telescopic arms 1 are connected with each other and slide along the axial direction. The inner diameter of the previous telescopic arm 1 is larger than the outer diameter of the next telescopic arm 1. Each telescopic arm 1 is provided with a stopper 2. This is the internal structure of the telescopic arm 1 in the prior art, and no further introduction is made here. A cleaning assembly 3 is provided on the stopper 2. The cleaning assembly 3 includes a first connecting frame 31, a second connecting frame 32, a threaded sleeve 33, a bolt 34, two brackets 35 and two scrapers 36. The first connecting frame 31 and the second connecting frame 32 are respectively The first connecting frame 31 and the second connecting frame 32 are movably mounted on the stopper 2, and the first connecting frame 31 and the second connecting frame 32 are symmetrically arranged. Through holes are provided on the first connecting frame 31 and the second connecting frame 32, and a threaded sleeve 33 is provided on the second connecting frame 32, and the position of the through hole corresponds to the position of the threaded sleeve 33. The bolts 34 are movably inserted through the through holes of the first connecting frame 31 and the second connecting frame 32 and connected to the threaded sleeve 33 of the second connecting frame 32. The two brackets 35 are respectively arranged on the front sides of the first connecting frame 31 and the second connecting frame 32, and the two scrapers 36 are respectively arranged on the inner walls of the two brackets 35.

[0017] The first connecting frame 31 and the second connecting frame 32 are fixed to the block 2 by bolts 34 and threaded sleeves 33. When the telescopic arm 1 is extending or retracting, the scraper 36 on the front telescopic arm 1 will scrape and clean the surface of the rear telescopic arm 1 to prevent dust and impurities from being adsorbed on the telescopic arm 1.

[0018] Specifically, the two brackets 35 form a rectangular frame, and the scraper 36 on the inner wall of the bracket 35 contacts the outer side of the previous telescopic arm 1.

[0019] Specifically, there are two threaded sleeves 33 and two bolts 34. The two threaded sleeves 33 are respectively located on the upper and lower sides of the second connecting frame 32, and the two bolts 34 are respectively located on the upper and lower sides of the first connecting frame 31, further enhancing the connection strength between the first connecting frame 31 and the second connecting frame 32.

[0020] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-stage telescopic arm for a crane, comprising a plurality of telescopic arms (1) and a stopper (2), wherein the plurality of telescopic arms (1) are connected to each other and slide along the axial direction, the inner diameter of the preceding telescopic arm (1) is greater than the outer diameter of the succeeding telescopic arm (1), and each telescopic arm (1) is provided with a stopper (2), characterized in that: The stopper (2) is provided with a cleaning assembly (3), the cleaning assembly (3) comprising a first connecting frame (31), a second connecting frame (32), a threaded sleeve (33), a bolt (34), two brackets (35) and two scrapers (36), the first connecting frame (31) and the second connecting frame (32) are respectively movably mounted on the stopper (2), and the first connecting frame (31) and the second connecting frame (32) are symmetrically arranged, and the first connecting frame (31) and the second connecting frame (32) are both provided with a through hole. The second connecting frame (32) is provided with a threaded sleeve (33), and the position of the through hole corresponds to the position of the threaded sleeve (33). The bolt (34) is movably inserted through the through holes of the first connecting frame (31) and the second connecting frame (32) and then connected to the threaded sleeve (33) of the second connecting frame (32). The two brackets (35) are respectively arranged on the front sides of the first connecting frame (31) and the second connecting frame (32), and the two scrapers (36) are respectively arranged on the inner walls of the two brackets (35).

2. The three-stage telescopic arm of a crane according to claim 1, characterized in that: The two brackets (35) form a rectangular frame, and the scraper (36) on the inner wall of the bracket (35) contacts the outer side of the telescopic arm (1) described in the previous section.

3. The three-stage telescopic arm of a crane according to claim 1, characterized in that: The number of the threaded sleeves (33) and the number of the bolts (34) are both two. The two threaded sleeves (33) are respectively located on the upper and lower sides of the second connecting frame (32), and the two bolts (34) are respectively located on the upper and lower sides of the first connecting frame (31).

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