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CN-224226534-U - Movable small-sized crane

CN224226534UCN 224226534 UCN224226534 UCN 224226534UCN-224226534-U

Abstract

The utility model relates to a movable small crane which comprises a cantilever assembly, a lifting rope, a stand column, a driving piece and a base, wherein the base is provided with wheels, the stand column is vertically fixed on the base, the cantilever assembly is installed on the stand column, the lifting rope is arranged on the cantilever assembly, the end part of the lifting rope is provided with a lifting appliance, the driving piece is arranged on the cantilever assembly and is in transmission connection with the lifting rope to drive the lifting appliance to lift, the cantilever assembly comprises a lifting arm, a rotating arm and a connecting arm, the lifting arm is connected with the rotating arm through the connecting arm, the rotating arm is vertical to the stand column and is in rotation connection with the stand column, the stand column can stretch along the axial direction of the stand column to enable the height of the cantilever assembly relative to the base to be changed, and a first bearing is arranged between the connecting arm and the stand column to enable the cantilever assembly to rotate relative to the central axis of the stand column. The movable small crane provided by the utility model has the advantages of smaller overall structure and good flexibility, and can be used in a narrow space.

Inventors

  • LIN CHONG

Assignees

  • 台州百田机械有限公司

Dates

Publication Date
20260512
Application Date
20250627

Claims (10)

  1. 1. A mobile small crane, characterized in that the crane (100) comprises: a base (10) provided with wheels (11); the upright post (20) is vertically fixed on the base (10); The cantilever assembly (30) comprises a lifting arm (33), a rotating arm (31) and a connecting arm (32), wherein the lifting arm (33) is connected with the rotating arm (31) through the connecting arm (32), the rotating arm (31) is perpendicular to the stand column (20) and is rotationally connected with the stand column (20), the stand column (20) can stretch and retract along the axial direction of the cantilever assembly (30) so as to change the height of the cantilever assembly relative to the base (10), and a first bearing (23) is arranged between the connecting arm (32) and the stand column so as to enable the cantilever assembly (30) to rotate relative to the central axis of the stand column (20); the lifting rope (40) is arranged on the cantilever assembly (30), and one end of the lifting rope (40) is provided with a lifting appliance; The driving piece (50) is positioned above the rotating arm (31) and is in transmission connection with the lifting rope (40) so as to drive the lifting appliance to lift.
  2. 2. The mobile small crane as claimed in claim 1, wherein the rotating arm (31) has a connecting portion (311), the connecting portion (311) is sleeved on the upright (20) and slides along the axial direction of the upright (20), the upright (20) is sleeved with a first clamp (21) and a second clamp (22), and the connecting portion (311) is located between the first clamp (21) and the second clamp (22) so that the rotating arm (31) is limited between the first clamp (21) and the second clamp (22); Wherein a preset gap (3111) is formed between the outer wall of the upright post (20) and the inner wall of the connecting portion (311).
  3. 3. The mobile small crane as claimed in claim 2, wherein the upright (20) comprises a fixed rod (24) and a telescopic rod (25) which are connected with each other, one end of the telescopic rod (25) extends into the fixed rod (24) and can slide reciprocally relative to the fixed rod (24) so as to extend or shorten the upright (20), and the relative positions of the telescopic rod (25) and the fixed rod (24) are cooperatively locked by a locking ring (241) and a locking matching ring (251).
  4. 4. The mobile crane as claimed in claim 1, wherein the connecting arm (32) further comprises a connecting pipe (321) and a connecting housing (322) connected to each other, the connecting pipe (321) being connected to the rotating arm (31), the connecting housing (322) being connected to the crane arm (33).
  5. 5. The mobile crane as claimed in claim 4, characterized in that the central axis of the connecting pipe (321) and the central axis of the boom (33) form an angle a, which is 110 ° -130 °.
  6. 6. A mobile crane as claimed in claim 1, characterized in that the drive member (50) is provided as a hand wheel or motor.
  7. 7. A mobile crane as claimed in claim 1, characterized in that said base (10) is provided with a first counterweight (13); And/or, a second weight piece is arranged on the upright (20), and the second weight piece is positioned on one side of the upright, which is opposite to the cantilever assembly.
  8. 8. The mobile small crane as claimed in claim 1, characterized in that the base (10) is further provided with support feet (12), the support feet (12) are connected with the base (10) by connecting rods (121), and the connecting rods (121) can move in the axial direction of the connecting rods themselves to adjust the distance of the support feet (12) from the ground.
  9. 9. A mobile crane as claimed in claim 1, characterized in that the hoisting rope (40) is provided as a roller chain which meshes with a gear (323) in the connecting arm (32), which gear (323) can be rotated by the drive (50) to bring about an extension or shortening of the roller chain relative to the boom (33).
  10. 10. A mobile crane as claimed in claim 9, further comprising a brake (60), said brake (60) being located on said connecting arm (32), and a drive shaft (3231) of said drive member (50) and a drive shaft (323) of said gear (323) being connected to said brake (60) respectively for controlling the speed of movement of said roller chain.

Description

Movable small-sized crane Technical Field The utility model relates to the technical field of hoisting equipment, in particular to a movable small crane. Background The crane, also called crane or hoist, is used for vertically lifting and horizontally carrying heavy objects in a certain range, and is widely applied to various fields. The existing crane is large in size, the crane is inconvenient to move and carry when being used in different occasions, and in some occasions with narrow spaces, such as workshops or warehouses, the crane is difficult to spread due to structural limitation, and the flexibility is poor. Disclosure of Invention The utility model aims to solve the problems in the background art and provides a movable small crane. In order to achieve the above purpose, the technical scheme of the utility model is as follows: a mobile small crane, the crane comprising: a base provided with wheels; the upright post is vertically fixed on the base; The cantilever assembly comprises a lifting arm, a rotating arm and a connecting arm, wherein the lifting arm is connected with the rotating arm through the connecting arm, the rotating arm is perpendicular to the upright post and is rotationally connected with the upright post, and the upright post can stretch along the axial direction of the upright post so as to change the height of the cantilever assembly relative to the base; the lifting rope is arranged on the cantilever assembly, and one end of the lifting rope is provided with a lifting appliance; The driving piece is positioned above the rotating arm and is in transmission connection with the lifting rope so as to drive the lifting appliance to lift. It can be understood that the cantilever assembly of hoist can rotate and cantilever assembly's height-adjustable around the stand 360, and the hoist can hang the heavy object in the radius scope that uses the stand as the centre of a circle, through the reasonable structural setting of cantilever assembly, the position of rotor arm can reduce relatively, more be convenient for operating personnel to adjust, and the overall structure of hoist is compact light, and convenient transportation removes, and operating personnel can bring the hoist into the narrow and small space that ordinary crane can not get into or be inapplicable, and the hoist can operate in narrow space, and the flexibility is strong. In one embodiment, the rotating arm is provided with a connecting part, the connecting part is sleeved on the upright post and slides along the axial direction of the upright post, a first clamp and a second clamp are sleeved on the upright post, and the connecting part is positioned between the first clamp and the second clamp, so that the rotating arm is limited between the first clamp and the second clamp; wherein, the outer wall of stand with be formed with the clearance that presets between the inner wall of connecting portion. It can be appreciated that the preset gap is set, so that the contact area between the connecting part and the upright post is reduced, and the connecting part can rotate relative to the upright post. In one embodiment, the upright post comprises a fixing rod and a telescopic rod which are connected with each other, one end of the telescopic rod stretches into the fixing rod and can slide back and forth relative to the fixing rod, so that the upright post stretches or shortens, and the relative position of the telescopic rod and the fixing rod is locked through a locking ring and a locking matching ring. In one embodiment, the connecting arm further comprises a connecting pipe and a connecting shell which are connected with each other, the connecting pipe is connected with the rotating arm, and the connecting shell is connected with the lifting arm. It is understood that the connecting arm is separately arranged into the connecting pipe and the connecting shell, so that the processing and the assembly are convenient. In one embodiment, an included angle A is formed between the central axis of the connecting pipe and the central axis of the lifting arm, and the included angle A is 110 degrees less than or equal to A less than or equal to 130 degrees. It can be appreciated that when the included angle A meets the condition, the crane is not easy to overturn during hoisting. In one embodiment, the drive is provided as a hand wheel or motor. In one embodiment, the base is provided with a first weight; And/or, a second weight piece is arranged on the upright post, and the second weight piece is positioned on one side of the upright post opposite to the cantilever assembly. It can be understood that setting up second weight spare and/or first weight spare is favorable to improving the overall stability of hoist, can also replace the weight spare of different masses according to the demand, adjusts the focus position of hoist. In one embodiment, the base is further provided with supporting feet, the supporting feet are connected wit