阅读说明：本技术 爬升架的滚轮组件及塔机 (Roller assembly of climbing frame and tower crane ) 是由 王黎明 李桂芳 刘圣平 兰加标 于 2020-12-07 设计创作，主要内容包括：本发明涉及工程机械,公开了一种爬升架的滚轮组件及塔机,所述爬升架的滚轮组件包括铰接臂(4)、可转动地安装于所述铰接臂(4)的第一端并能够抵压于标准节的滚轮(3)、螺杆(6),所述铰接臂(4)可转动地铰接于爬升架(2),所述螺杆(6)能够螺接于所述爬升架(2),所述螺杆(6)能够抵压于所述铰接臂(4),并且所述螺杆(6)能够相对于所述爬升架(2)转动,以推动所述铰接臂(4)围绕所述铰接轴(9)转动。通过上述技术方案,通过螺杆来调节铰接臂的位置,可以更为准确地调节滚轮与主弦杆的距离,使得滚轮与主弦杆的距离保持在更为精确的范围内,这种可调节的滚轮结构,可以允许较低的生产精度,降低了生产成本。(The invention relates to engineering machinery and discloses a roller assembly of a climbing frame and a tower crane, wherein the roller assembly of the climbing frame comprises an articulated arm (4), a roller (3) which is rotatably arranged at the first end of the articulated arm (4) and can be pressed against a standard joint, and a screw (6), the articulated arm (4) is rotatably hinged to the climbing frame (2), the screw (6) can be in threaded connection with the climbing frame (2), the screw (6) can be pressed against the articulated arm (4), and the screw (6) can rotate relative to the climbing frame (2) so as to push the articulated arm (4) to rotate around a hinged shaft (9). Through above-mentioned technical scheme, adjust the position of articulated arm through the screw rod, can adjust the distance of gyro wheel and main chord member more accurately for the distance of gyro wheel and main chord member keeps in more accurate within range, and lower production precision has been reduced to this kind of adjustable gyro wheel structure, has reduced manufacturing cost.)

1. The climbing frame roller assembly is characterized by comprising an articulated arm (4), a roller (3) which is rotatably installed at the first end of the articulated arm (4) and can be pressed against a standard joint, and a screw (6), wherein the second end of the articulated arm (4) can be rotatably hinged to a climbing frame (2) through a hinged shaft (9), the screw (6) can be in threaded connection with the climbing frame (2), the first end of the screw (6) can be pressed against the articulated arm (4), and the screw (6) can rotate relative to the climbing frame (2) so as to push the articulated arm (4) to rotate around the hinged shaft (9).

2. The climbing frame roller assembly according to claim 1, characterized in that it comprises a screw socket (7) connectable to the climbing frame (2), the screw (6) passing through the screw socket (7).

3. The climbing frame roller assembly according to claim 2, characterized in that the second end of the screw (6) is provided with a head (12) with a polygonal cross-section.

4. The climbing frame roller assembly according to claim 3, wherein the portion of the screw (6) between the head (12) and the screw seat (7) is screwed with a locknut (5).

5. The climbing frame roller assembly according to claim 1, characterized in that it comprises a connecting seat (8) mountable to the climbing frame (2), the articulated arm (4) being hinged to the connecting seat (8).

6. The climbing frame roller assembly according to claim 5, wherein the central axis of the articulated shaft (9) is parallel to the central axis of the roller (3).

7. The climbing frame roller assembly according to claim 5, wherein the central axis of the screw (6) is perpendicular to the central axis of the articulated shaft (9).

8. A roller assembly of a climbing frame according to claim 1, characterized in that the roller (3) is rotatably mounted to the articulated arm (4) by means of a swivel axle (10), a self-lubricating bushing (11) being provided between the swivel axle (10) and the roller (3).

9. Tower crane, characterized in that it comprises a climbing frame (2), a standard knot and a roller assembly of the climbing frame according to any of claims 1-8, which is mounted to the climbing frame (2) and the roller (3) and the main chord (1) of the standard knot are spaced from each other.

10. The tower crane according to claim 9, characterized in that the standard knot comprises four main chords (1) located at four corners, respectively, each main chord (1) comprising two sides corresponding to the corners of the standard knot, the climbing frame (2) being provided with two roller assemblies corresponding to the two sides of each main chord (1), respectively.

Technical Field

The invention relates to engineering machinery, in particular to a roller assembly of a climbing frame and a tower crane.

Background

The roller type of the existing tower crane climbing frame has two types of fixed rollers and adjustable rollers. Proper roller clearance needs to be kept between the climbing frame roller and the standard knot.

The roller clearance influences the safety of the climbing frame in the jacking process, and is extremely important to the control of the roller clearance. The fixed roller type has extremely high requirements on manufacturing precision, once the gap does not reach the standard, the adjustment and the control cannot be realized, and the adjustment and the modification are time-consuming and labor-consuming; the existing adjustable roller type has complex structure and high manufacturing cost, is less used on a climbing frame of a medium and small tower, and is not easy to disassemble and assemble after the roller frame is damaged.

Disclosure of Invention

The invention aims to provide a roller assembly of a climbing frame, which aims to solve the problem that the distance between a roller and a main chord cannot be accurately adjusted.

In order to achieve the above object, the present invention provides a roller assembly of a climbing frame, wherein the roller assembly of the climbing frame comprises an articulated arm, a roller rotatably mounted at a first end of the articulated arm and capable of abutting against a standard joint, and a screw rod, a second end of the articulated arm is rotatably hinged to the climbing frame through an articulated shaft, the screw rod is capable of being screwed to the climbing frame, a first end of the screw rod is capable of abutting against the articulated arm, and the screw rod is capable of rotating relative to the climbing frame to push the articulated arm to rotate around the articulated shaft.

Optionally, the roller assembly of the climbing frame comprises a screw seat capable of being connected to the climbing frame, and the screw rod passes through the screw seat.

Optionally, the second end of the screw is provided with a head having a polygonal cross-section.

Optionally, a locknut is screwed on a part of the screw rod between the head and the screw seat.

Optionally, the roller assembly of the climbing frame comprises a connecting seat capable of being mounted on the climbing frame, and the hinge arm is hinged to the connecting seat.

Alternatively, the central axis of the hinge shaft is parallel to the central axis of the roller.

Optionally, the central axis of the screw is perpendicular to the central axis of the hinge shaft.

Optionally, the roller is rotatably mounted on the hinge arm through a rotating shaft, and a self-lubricating sleeve is arranged between the rotating shaft and the roller.

In addition, the invention also provides a tower crane, wherein the tower crane comprises a climbing frame, a standard knot and the roller assembly of the climbing frame in the scheme, the roller assembly is installed on the climbing frame, and the roller and the main chord of the standard knot are spaced from each other.

Optionally, the standard knot comprises four main chords respectively located at four corners, each main chord comprises two sides corresponding to the corners of the standard knot, and the climbing frame is provided with two roller assemblies respectively corresponding to the two sides of each main chord.

Through above-mentioned technical scheme, adjust the position of articulated arm through the screw rod, can adjust the distance of gyro wheel and main chord member more accurately for the distance of gyro wheel and main chord member keeps in more accurate within range, and lower production precision has been reduced to this kind of adjustable gyro wheel structure, has reduced manufacturing cost.

Drawings

Fig. 1 is a view of a tower crane according to an embodiment of the present invention, as viewed in a horizontal direction;

fig. 2 is a view seen in the direction a in fig. 1;

fig. 3 is a view seen in the direction B in fig. 1.

Description of the reference numerals

1 main chord 2 climbing frame

3 roller 4 articulated arm

5 locknut 6 screw

7 screw connecting seat 8 connecting seat

9 articulated shaft and 10 rotating shafts

11 self-lubricating shaft sleeve 12 head

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

The invention provides a roller assembly of a climbing frame, wherein the roller assembly of the climbing frame comprises an articulated arm 4, a roller 3 which is rotatably arranged at the first end of the articulated arm 4 and can be pressed against a standard joint, and a screw rod 6, the second end of the articulated arm 4 can be rotatably hinged to the climbing frame 2 through an articulated shaft 9, the screw rod 6 can be screwed on the climbing frame 2, the first end of the screw rod 6 can be pressed against the articulated arm 4, and the screw rod 6 can rotate relative to the climbing frame 2 to push the articulated arm 4 to rotate around the articulated shaft 9.

The position of the rollers 3 on the articulated arm 4 changes when the articulated arm 4 is rotated about the articulation axis 9, and when the articulated arm 4 is mounted on the climbing frame 2, the rotation of the articulated arm 4 causes the position of the rollers 3 with respect to the climbing frame 2 to change, in particular with respect to the distance of the standard knot in which the climbing frame 2 is located.

In the scheme, the screw 6 can be moved towards the main chord of the standard knot along the length direction of the screw 6 by rotating the screw 6, so that the second end of the hinged arm 4 is driven to rotate towards the main chord 1 of the standard knot, and the distance between the roller 3 and the main chord 1 is reduced; turning the screw 6 in reflection may allow the articulated arm 4 to turn in reverse to allow the roller 3 to move away from the main chord 1, which movement away from the main chord 1 may be achieved by manually turning the articulated arm 4 (pressing on the end of the screw 6).

The position of the articulated arm 4 is adjusted through the screw rod 6, the distance between the roller 3 and the main chord 1 can be adjusted more accurately, so that the distance between the roller 3 and the main chord 1 is kept in a more accurate range, the adjustable roller structure can allow lower production precision, the production cost is reduced, the roller assembly structure of the scheme is simpler, the installation and the disassembly are convenient, and the installation and the maintenance difficulty are reduced.

In addition, the roller assembly of the climbing frame comprises a screw joint seat 7 which can be connected to the climbing frame 2, and the screw 6 passes through the screw joint seat 7. Fig. 1 is a view seen in a horizontal direction, in which an articulated arm 4 extends from above downwards, the upper end of which is hinged to a climbing frame 2, a screw socket 7 is connected to the underside of the cross beam of the climbing frame 2, a screw 6 passes horizontally through the screw socket 7, the first end of which is pressed against the lower end of the articulated arm 4, and the lower end of the articulated arm 4 is provided with a roller 3. The screw connection seat 7 can provide an installation foundation for the screw 6, the situation that the size of the cross beam of the climbing frame 2 in the vertical direction is insufficient is avoided, and the screw connection seat 7 is of a solid structure and is convenient to be in threaded connection with the screw 6. The screw-on seat 7 may be welded to the climbing frame 2, in which a threaded hole is formed to cooperate with the screw 6.

In addition, a second end of the screw 6 is provided with a head 12 having a polygonal cross-section. As shown in fig. 1 and 3, the second end of the screw 6 is provided with a head 12, and the cross section of the head 12 may be triangular, quadrangular, hexagonal, etc., preferably hexagonal, so as to rotate the screw 6 by clamping the head 12. The screw 6 and the head 12 may be integrally connected.

In addition, a locknut 5 is screwed on the part of the screw 6 between the head 12 and the screw seat 7. As shown in fig. 1 and 3, the screw 6 is screwed with the locknut 5, the locknut 5 is located between the head 12 and the screw seat 7, and after the screw 6 is adjusted to a target position, the locknut 5 is rotated and moved to a position attached to the screw seat 7, so that the screw 6 is prevented from rotating relative to the screw seat 7, and the screw 6 is stably limited to the articulated arm 4.

In addition, the roller assembly of the climbing frame comprises a connecting seat 8 which can be arranged on the climbing frame 2, and the hinged arm 4 is hinged on the connecting seat 8. As shown in FIG. 1, the connecting base 8 is mounted on the side of the cross beam of the climbing frame 2 facing the main chord 1, the connecting base 8 provides a mounting base for the articulated arm 4, so that the articulated arm 4 is mounted on the climbing frame 2 in a proper relative position, and the mounting of the articulated arm 4 does not substantially damage the climbing frame 2, ensuring that the climbing frame 2 has sufficient strength. The connecting base 8 can be connected to the cross beam of the climbing frame 2 by welding.

Wherein the central axis of the hinge shaft 9 is parallel to the central axis of the roller 3. When the articulated arm 4 is hinged on the climbing frame 2, the distance between the peripheral surface of the roller 3 and the main chord 1 of the standard knot can be changed when the articulated arm 4 rotates around the central axis of the hinged shaft 9, particularly, the central axis of the roller 3 extends along the horizontal direction and is approximately perpendicular to the extending direction of the main chord 1, namely, the vertical direction, when the roller 3 is attached to the main chord 1, the roller rotates around the horizontal central axis along with the vertical movement of the climbing frame 2, the sliding friction between the climbing frame 2 and the main chord 1 is replaced by the rolling friction, and the rolling direction of the roller 3 is suitable for the relative movement of the climbing frame 2 and the main chord 1 along the vertical direction. Of course,

wherein the central axis of the screw 6 is perpendicular to the central axis of the hinge shaft 9. The screw 6 is rotated about its central axis to move along the central axis, so that the hinge arm 4 can be urged to rotate about the central axis of the hinge shaft 9.

In addition, the roller 3 is rotatably mounted to the hinge arm 4 by a rotation shaft 10, and a self-lubricating bushing 11 is disposed between the rotation shaft 10 and the roller 3. As shown in fig. 3, the rotation shaft 10 is partially installed on the hinge arm 4, and another part passes through the roller 3 to allow the roller 3 to rotate around the rotation shaft 10, and a self-lubricating sleeve 11 is sleeved on the rotation shaft 10, and the roller 3 is sleeved on the self-lubricating sleeve 11, wherein the rotation shaft 10 can be kept fixed relative to the hinge arm 4, and the self-lubricating sleeve 11 rotates around the rotation shaft 10 synchronously with the roller 3. The self-lubricating shaft sleeve 11 has a self-lubricating function, and maintenance frequency can be reduced.

In addition, the invention also provides a tower crane, wherein the tower crane comprises a climbing frame 2, a standard knot and the roller assembly of the climbing frame in the scheme, the roller assembly is installed on the climbing frame 2, and the roller 3 and the main chord 1 of the standard knot are spaced from each other. The outer peripheral surface of the roller 3 can be pressed against the side surface of the main chord 1, so that when the climbing frame 2 moves up and down relative to the standard knot, sliding friction between the climbing frame 2 and the standard knot can be avoided. The rollers 3 may be spaced from the main chord 1 when the center of gravity of the climbing frame 2 is not deflected, and when the center of gravity of the climbing frame 2 is deflected (for example, the center of gravity is deflected by a loaded boom), a part of the rollers 3 on the climbing frame 2 come into contact with the main chord 1, so as to avoid sliding friction between the climbing frame 2 and the main chord 1.

Further, the standard knot comprises four main chords 1 respectively located at four corners, each main chord 1 comprises two side faces corresponding to the corners of the standard knot, and the climbing frame 2 is provided with two roller assemblies respectively corresponding to the two side faces of each main chord 1. The standard knot comprises four main chords 1 positioned at four corners, each main chord 1 is of a quadrilateral section and comprises 4 side faces, wherein two adjacent side faces form the corners of the standard knot, or two side faces of each main chord 1 correspond to two side faces of the whole standard knot; the two side surfaces forming the standard pitch part are respectively provided with the roller assemblies, so that 8 roller assemblies can be arranged at the same height position of the climbing frame 2, namely two roller assemblies are arranged corresponding to each main chord 1.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the specific features in any suitable way, and the invention will not be further described in relation to the various possible combinations in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.