阅读说明：本技术 一种门机原木抓斗作业专用开闭绳平衡装置 (Special switching rope balancing unit of quick-witted log grab operation of door ) 是由 马先伟 杨明 缑亮亮 柳洪 于 2020-12-04 设计创作，主要内容包括：一种门机原木抓斗作业专用开闭绳平衡装置,包括顶架、中心盘、底架、吊环、中心轴、嵌合件、端盖、第一螺栓和第二螺栓；顶架的两端顶面设有吊耳；中心盘设置于顶架的顶侧中心,中心盘包括第一圆盘和第二圆盘,通过第一螺栓实现中心盘装配固定,通过第二螺栓实现中心盘与顶架装配；底架设置于中心盘的中心；中心轴包括转动段和限位段；底架与中心轴可转动设置,中心盘、顶架与中心轴呈限位固定；端盖设置于顶架的两侧外壁面,固定螺柱贯穿法兰,并配合螺母实现端盖与顶架固定,端盖对中心轴限位。本发明可保持开闭钢丝绳可处于稳定的状态下进行起升,有效的防止钢丝绳缠绕打结,生产具有良好工艺效率；装置自身具有良好的结构强度和使用性能。(A special opening and closing rope balancing device for a gate machine log grab bucket operation comprises a top frame, a central disc, an underframe, a hanging ring, a central shaft, an embedded part, an end cover, a first bolt and a second bolt; lifting lugs are arranged on the top surfaces of the two ends of the top frame; the central disc is arranged in the center of the top side of the top frame and comprises a first disc and a second disc, the central disc is assembled and fixed through a first bolt, and the central disc is assembled with the top frame through a second bolt; the bottom frame is arranged in the center of the central disc; the central shaft comprises a rotating section and a limiting section; the bottom frame and the central shaft are rotatably arranged, and the central disc, the top frame and the central shaft are fixed in a limiting way; the end covers are arranged on the outer wall surfaces of two sides of the top frame, the fixing studs penetrate through the flanges and are matched with nuts to fix the end covers and the top frame, and the end covers limit the central shaft. The invention can keep the opening and closing steel wire rope to be lifted in a stable state, effectively prevents the steel wire rope from being wound and knotted, and has good production process efficiency; the device itself has good structural strength and performance.)

1. A special opening and closing rope balancing device for a gate machine log grab bucket operation is characterized by comprising a top frame (1), a central disc (2), an underframe (3), a hanging ring (4), a central shaft (5), an embedded piece (6), an end cover (7), a first bolt (8) and a second bolt (9);

the centers of two side wall surfaces of the top frame (1) are in a through hole shape to form a top frame through hole (1-1), and two sides of each side of the top frame through hole (1-1) are in a notch shape to form a top frame limiting groove (1-2); the outer side wall surface of each side of the top frame through hole (1-1) is provided with a fixing stud (1-3), and the fixing studs (1-3) are welded and vertically fixed with the wall surface of the top frame (1); the top end of the side wall surface of the top frame (1) is provided with a top frame assembly hole (1-4); two sides of the top surface of the top frame (1) are provided with top frame rotating shafts (1-5), and the top frame rotating shafts (1-5) and the top frame (1) are rotatably arranged; the middle end side wall of the top frame rotating shaft (1-5) is provided with a reset rod (1-6), the reset rod (1-6) is vertically fixed with the top frame rotating shaft (1-5), the side wall surface of the reset rod (1-6) is in a convex structure in the circumferential direction to form a reset ring (1-7), and the reset ring (1-7) is fixedly arranged with the reset rod (1-6); lifting lugs (1-8) are arranged on the top surfaces of two ends of the top frame (1), and the lifting lugs (1-8) are vertically fixed with the top frame (1);

the center plate (2) is arranged in the center of the top side of the top frame (1), the center plate (2) comprises a first disc (2-1) and a second disc (2-2), the centers of the first disc (2-1) and the second disc (2-2) are both in a through hole shape to form a center plate through hole (2-3), two sides of the center plate through hole (2-3) on each side are in a notch shape to form a center plate limiting groove (2-4), center plate assembling holes (2-5) are circumferentially arranged on outer rings of the first disc (2-1) and the second disc (2-2), and center plate sliding holes (2-6) are arranged on the bottom sides of the first disc (2-1) and the second disc (2-2); a first abutting block (2-7) is arranged on one side wall surface of the first disc (2-1), the first abutting block (2-7) and the first disc (2-1) are fixedly arranged, a second abutting block (2-8) is further arranged on one side wall surface of the first disc (2-1), the second abutting block (2-8) and the first disc (2-1) are fixedly arranged, and the central disc assembling hole (2-5) penetrates through the first abutting block (2-7) and the second abutting block (2-8) respectively; the first disc (2-1) and the second disc (2-2) are oppositely arranged, the first abutting block (2-7) and the second abutting block (2-8) abut against the side wall surface of the second disc (2-2), the central disc (2) is assembled and fixed by penetrating through central disc assembling holes (2-5) on two sides of the first disc (2-1) and the second disc (2-2) through a first bolt (8), and the central disc (2) is assembled and fixed by penetrating through the top frame assembling holes (1-4) and the top side central disc assembling holes (2-5) through a second bolt (9);

the bottom frame (3) is arranged in the center of the central disc (2), the middle end of the bottom frame (3) is embedded between the first disc (2-1) and the second disc (2-2), the bottom end of the bottom frame (3) extends out of the bottom end of the central disc (2), and the top end of the top frame (1) extends out of the top ends of the two sides of the central disc (2) and into the two sides of the top frame (1); the center of the bottom frame (3) is in a through hole shape, and a bottom frame through hole (3-1) is formed; two wall surfaces at the bottom end of the bottom frame (3) are provided with limiting shafts (3-2), each limiting shaft (3-2) is vertically fixed with the bottom frame (3), and the limiting shafts (3-2) extend into the central disc sliding holes (2-6); the top ends of two sides of the bottom frame (3) are of a hollow structure to form a reset sliding cavity (3-3), two ends of the reset sliding cavity (3-3) are of hollow structures to form a reset sliding chute (3-4), the top frame rotating shaft (1-5) penetrates through the reset sliding chute (3-4), the reset rod (1-6) extends into the reset sliding cavity (3-3), and the reset ring (1-7) and the reset sliding cavity (3-3) are arranged in a sliding mode; a reset spring (3-5) is arranged in the reset sliding cavity (3-3), one end of the reset spring (3-5) is abutted against the end face of the reset sliding cavity (3-3), and one end of the reset spring (3-5) is abutted against the end face of the reset ring (1-7); the lifting rings (4) are arranged at two ends of the bottom side of the bottom frame (3);

the central shaft (5) comprises a rotating section (5-1) and a limiting section (5-2), the limiting section (5-2) is arranged on the end faces of two ends of the rotating section (5-1), and the two limiting sections (5-2) and the rotating section (5-1) are coaxially arranged and are in an integrated structure; two side walls of each rotating section (5-1) are of groove-shaped structures to form a central shaft clamping groove (5-3); the central shaft clamping grooves (5-3) of the rotating sections (5-1) at each end are oppositely arranged; the embedded part (6) can be embedded into the central shaft clamping groove (5-3) for fixation; the central shaft (5) is arranged at the bottom end of the bottom frame (3), the rotating section (5-1) is embedded into the bottom frame through hole (3-1), the limiting sections (5-2) at two ends respectively penetrate through the central disc through hole (2-3) and the top frame through hole (1-1) in sequence, the embedded part (6) is embedded into the central disc limiting groove (2-4) and the top frame limiting groove (1-2) respectively, the bottom frame (3) and the central shaft (5) can be rotatably arranged, and the central disc (2) and the top frame (1) are fixed with the central shaft (5) in a limiting manner;

the end covers (7) are arranged on the outer wall surfaces of two sides of the top frame (1), each end cover (7) comprises a sleeving cap (7-1) and a flange (7-2), and each flange (7-2) is arranged on the outer wall surface of one end of each sleeving cap (7-1) and is fixedly arranged with the corresponding sleeving cap (7-1); the center of the sleeve cap is in a groove shape to form a sleeving hole (7-3), the sleeve hole is communicated with the flange (7-2), two side walls of the sleeving hole (7-3) are in a groove shape to form a sleeving groove (7-4), the flange (7-2) is attached to two side wall surfaces of the top frame (1) respectively, the limiting section (5-2) extends into the sleeving hole (7-3), the embedded parts (6) are embedded into the sleeving groove (7-4) respectively, the fixing studs (1-3) penetrate through the flange (7-2) and are matched with nuts to fix the end cover (7) and the top frame (1), and the end cover (7) is limited to the central shaft (5).

2. The special opening and closing rope balancing device for the door crane log grab bucket operation according to claim 1, wherein the cross section of the top frame (1) is in an inverted U-shaped structure, the bottom edges of two sides of the top frame (1) are in a convex structure and are in a circular arc shape, and the top frame through hole (1-1) is formed in the circular arc center of each side of the top frame (1); the top surface both ends of roof-rack (1) are protruding form, roof-rack pivot (1-5) set up in the both ends arch department of roof-rack (1).

3. The opening and closing rope balancing device special for the door crane log grab bucket operation is characterized in that reinforcing pieces (1-9) are arranged on the inner top surface of the top frame (1), the reinforcing pieces (1-9) are arranged in a transverse array, and the reinforcing pieces (1-9) are supported on the inner side wall of the top frame (1) and are welded and fixed with the inner wall surface of the top frame (1).

4. The opening and closing rope balancing device special for the door machine log grab bucket operation is characterized in that the first abutting blocks (2-7) are arranged at the top ends of the side walls of the first circular disc (2-1), the first abutting blocks (2-7) are of circular arc structures, and the shapes of the first abutting blocks (2-7) are matched with the shapes of the first circular disc (2-1).

5. The opening and closing rope balancing device special for the door machine log grab bucket operation is characterized in that the number of the second abutting blocks (2-8) is two, the second abutting blocks are respectively arranged at two sides of the bottom end of the side wall of the first disc (2-1) and are symmetrically arranged; the second abutting blocks (2-8) on each side are of fan-shaped structures.

6. The special opening and closing rope balancing device for the door machine log grab bucket operation according to claim 1, wherein the central disc sliding hole (2-6) is of a kidney-shaped hole structure and is of an arc shape; the diameter of the limiting shaft (3-2) is matched with the inner diameter of the central disc sliding hole (2-6), and the limiting shaft (3-2) is arranged in the central disc sliding hole (2-6) in a sliding manner; the end part of the limiting shaft (3-2) is provided with a shaft end block (3-6), the shaft end block (3-6) is fixedly arranged with the limiting shaft (3-2) on each side, the diameter of the shaft end block (3-6) is larger than that of the limiting shaft (3-2), and the shaft end block (3-6) is attached to the outer side wall surface of the central disc (2).

7. The special opening and closing rope balancing device for the door machine log grab bucket operation is characterized in that the cross section of the bottom frame (3) is of an I-shaped structure, and the thickness of the bottom end of the bottom frame (3) is larger than the thickness of the center of the bottom frame (3); the top ends of two sides of the bottom frame (3) are of an L-shaped structure and are obliquely arranged, and the thickness of the top ends of the two sides of the bottom frame (3) is larger than the thickness of the center of the bottom frame (3) and is matched with the width of two side wall surfaces of the top frame (1).

8. The special opening and closing rope balancing device for the door machine log grab bucket operation is characterized in that the diameter and the width of the rotating section (5-1) are adapted to the inner diameter and the depth of the underframe through hole (3-1); the diameter of the limiting section (5-2) is matched with the inner diameters of the central disc through hole (2-3) and the top frame through hole (1-1), and the end face of the limiting section (5-2) extends out of the outer wall face of the top frame (1).

9. The opening and closing rope balancing device special for the door machine log grab bucket operation is characterized in that each side of the central shaft clamping groove (5-3) is of a waist-shaped groove structure, the embedded part (6) is of a waist-shaped block structure, the shape and the size of the embedded part (6) are matched with those of the central shaft clamping groove (5-3), and the thickness of the embedded part (6) is larger than the groove depth of the central shaft clamping groove (5-3).

10. The opening and closing rope balancing device special for the door machine log grab bucket operation is characterized in that the length of the wall surface of the top frame (1) extending into the sleeve hole (7-3) is larger than that of the wall surface of the limiting section (5-2), and the inner diameter of the sleeve hole (7-3) is matched with the outer diameter of the limiting section (5-2).

Technical Field

The invention relates to the field of hoisting technical devices, in particular to a special opening and closing rope balancing device for a gate machine log grab bucket operation.

Background

The gantry crane and the hanger are connected by adopting an anti-rotation sleeve or shackle direct connection, the gantry crane often has a steel wire rope winding phenomenon in the operation process, and a plurality of potential safety hazards are left, for example, the steel wire rope winding and lifting are easy to cause the phenomena of winding drum steel wire rope jumping, steel wire rope jumping at the position of a trunk bridge pulley, aggravation of steel wire rope abrasion, wire breakage, strand breakage and the like. In the operation process of a door operator, the door operator needs to drop, place and open and close for multiple times for avoiding the winding of the steel wire rope, so that the single goods taking and placing time is increased, the production efficiency is influenced, and the operation risk and the maintenance cost are increased. The switching rope department of now need setting up by the gimbal structure, the gimbal has good intensity, and this gimbal structure can effectively adjust the balanced atress of switching rope, reduces the impaired condition of switching rope among the operation process.

Disclosure of Invention

In order to solve the existing problems, the invention discloses a special opening and closing rope balancing device for a log grab bucket of a gantry crane, which has the following specific technical scheme: a special opening and closing rope balancing device for a gate machine log grab bucket operation comprises a top frame, a central disc, an underframe, a hanging ring, a central shaft, an embedded part, an end cover, a first bolt and a second bolt;

the centers of two side wall surfaces of the top frame are in a through hole shape to form a top frame through hole, and two sides of each side of the top frame through hole are in a notch shape to form a top frame limiting groove; the outer side wall surface of each side of the top frame through hole is provided with a fixing stud, and the fixing studs are welded and vertically fixed with the wall surface of the top frame; the top end of the side wall surface of the top frame is provided with a top frame assembling hole; the two sides of the top surface of the top frame are provided with top frame rotating shafts, and the top frame rotating shafts and the top frame are arranged in a rotatable mode; a reset rod is arranged on the side wall of the middle end of the top frame rotating shaft, the reset rod is vertically fixed with the top frame rotating shaft, the circumferential direction of the side wall surface of the reset rod is of a convex structure to form a reset ring, and the reset ring is fixedly arranged with the reset rod; lifting lugs are arranged on the top surfaces of two ends of the top frame and are vertically fixed with the top frame;

the center plate is arranged in the center of the top side of the top frame and comprises a first disc and a second disc, the centers of the first disc and the second disc are both in a through hole shape to form a center plate through hole, two sides of the center plate through hole on each side are in a notch shape to form a center plate limiting groove, center plate assembly holes are circumferentially arranged on the outer rings of the first disc and the second disc, and center plate sliding holes are formed in the bottom sides of the first disc and the second disc; a first abutting block is arranged on one side wall surface of the first disc, the first abutting block and the first disc are fixedly arranged, a second abutting block is further arranged on one side wall surface of the first disc, the second abutting block and the first disc are fixedly arranged, and the central disc assembly hole penetrates through the first abutting block and the second abutting block respectively; the first disc and the second disc are oppositely arranged, the first abutting block and the second abutting block abut against the side wall surface of the second disc, the central disc is assembled and fixed by penetrating through the central disc assembling holes on two sides of the first disc and the second disc through the first bolt, and the central disc is assembled with the top frame by penetrating through the top frame assembling holes and the top side central disc assembling holes through the second bolt;

the bottom frame is arranged in the center of the central disc, the middle end of the bottom frame is embedded between the first disc and the second disc, the bottom end of the bottom frame extends out of the bottom end of the central disc, and the top end of the top frame extends out of the top ends of the two sides of the central disc and extends into the two sides of the top frame; the center of the bottom frame is in a through hole shape, and a bottom frame through hole is formed; the two wall surfaces at the bottom end of the bottom frame are provided with limiting shafts, the limiting shaft at each side is vertically fixed with the bottom frame, and the limiting shafts extend into the central disc sliding holes; the top ends of two sides of the bottom frame are of hollow structures to form a reset sliding cavity, two ends of the reset sliding cavity are of hollow structures to form a reset sliding groove, the rotating shaft of the top frame penetrates through the reset sliding groove, the reset rod extends into the reset sliding cavity, and the reset ring and the reset sliding cavity are arranged in a sliding mode; a reset spring is arranged in the reset sliding cavity, one end of the reset spring is abutted against the end face of the reset sliding cavity, and one end of the reset spring is abutted against the end face of the reset ring; the lifting rings are arranged at two ends of the bottom side of the underframe;

the central shaft comprises a rotating section and a limiting section, the limiting section is arranged on the end faces of two ends of the rotating section, and the two limiting sections and the rotating section are coaxially arranged and are of an integrated structure; two side walls of each rotating section are of groove-shaped structures to form a central shaft clamping groove; the central shaft clamping grooves of the rotating sections at each end are oppositely arranged; the embedded part can be embedded into the central shaft clamping groove for fixing; the central shaft is arranged at the bottom end of the underframe, the rotating section is embedded into the underframe through hole, the limiting sections at two ends respectively penetrate through the central disc through hole and the top frame through hole in sequence, the embedded parts are respectively embedded into the central disc limiting groove and the top frame limiting groove, so that the underframe and the central shaft can be rotatably arranged, and the central disc, the top frame and the central shaft are fixed in a limiting manner;

the end covers are arranged on the outer wall surfaces of two sides of the top frame and comprise a sleeving cap and a flange, and the flange is arranged on the outer wall surface of one end of the sleeving cap and is fixedly arranged with the sleeving cap; the center of the sleeve cap is in a groove shape to form a sleeving hole, the sleeve hole is communicated with the flange, two side walls of the sleeving hole are in the groove shape to form a sleeving groove, the flange is attached to two side wall surfaces of the top frame respectively, the limiting section extends into the sleeving hole, the embedded parts are embedded into the sleeving groove respectively, the fixing stud penetrates through the flange and is matched with a nut to realize that the end cover is fixed with the top frame, and the end cover is limited to the central shaft.

Furthermore, the cross section of the top frame is of an inverted U-shaped structure, the bottom edges of two sides of the top frame are of a convex structure and are of an arc shape, and the through holes of the top frame are arranged in the arc center of each side of the top frame; the top surface both ends of roof-rack are protruding form, the roof-rack pivot set up in the both ends arch department of roof-rack.

Furthermore, the inner top surface of the top frame is provided with reinforcing pieces which are arranged in a transverse array mode, and the reinforcing pieces are supported on the inner side wall of the top frame and are fixedly welded with the inner wall surface of the top frame.

Furthermore, the first abutting block is arranged at the top end of the side wall of the first disc, the first abutting block is of an arc-shaped structure, and the appearance of the first abutting block is matched with that of the first disc.

Furthermore, the number of the second abutting blocks is two, and the second abutting blocks are respectively arranged on two sides of the bottom end of the side wall of the first disc and are symmetrically arranged; the second abutting block on each side is of a fan-shaped structure.

Furthermore, the central disc sliding hole is of a waist-shaped hole structure and is in an arc shape; the diameter of the limiting shaft is matched with the inner diameter of the central disc sliding hole, and the limiting shaft is arranged in the central disc sliding hole in a sliding manner; the end part of the limiting shaft is provided with a shaft end block, the shaft end block is fixedly arranged with the limiting shaft on each side, the diameter of the shaft end block is larger than that of the limiting shaft, and the shaft end block is attached to the outer side wall surface of the central disc.

Furthermore, the cross section of the bottom frame is of an I-shaped structure, and the thickness of the bottom end of the bottom frame is greater than the thickness of the center of the bottom frame; the top ends of the two sides of the bottom frame are of L-shaped structures and are obliquely arranged, and the thickness of the top ends of the two sides of the bottom frame is larger than the thickness of the center of the bottom frame and is matched with the width of the two side wall surfaces of the top frame.

Furthermore, the diameter and the width of the rotating section are adapted to the inner diameter and the depth of the through hole of the underframe; the diameter of the limiting section is matched with the inner diameters of the central disc through hole and the top frame through hole, and the end face of the limiting section extends out of the outer wall face of the top frame.

Furthermore, each side of the central shaft clamping groove is of a waist-shaped groove structure, the embedded piece is of a waist-shaped block structure, the shape and the size of the embedded piece are matched with those of the central shaft clamping groove, and the thickness of the embedded piece is larger than the groove depth of the central shaft clamping groove.

Furthermore, the length of the wall surface of the nesting hole extending out of the top frame is larger than that of the wall surface of the limiting section extending out of the top frame, and the inner diameter of the nesting hole is matched with the outer diameter of the limiting section.

The invention has the beneficial effects that:

the invention designs a balance frame structure aiming at the opening and closing steel wire rope between a gantry crane and a lifting appliance, the balance frame structure realizes the pressure regulation of the steel wire ropes on the two sides of the balance frame through the assembly of a plurality of components including a top frame, a bottom frame and a central disc, the balance frame can rotate in a self-adaptive manner to regulate the stress after the steel wire ropes are stressed unevenly, the opening and closing steel wire ropes are always kept in a stress balanced state, the opening and closing steel wire ropes can be kept to be lifted in a stable state, the opening and closing steel wire ropes are effectively prevented from being wound and knotted, the smooth operation of the lifting process is kept, meanwhile, the repeated falling, opening and closing operations are avoided, the production efficiency is improved, and the device has good stability and process efficiency.

The balance frame is arranged aiming at the structure of the balance frame, the top frame and the bottom frame of the balance frame are designed to be in a flexible structure mode with a return spring in an abutting mode, and the stability of the adjusting process when the bottom frame rotates under stress is guaranteed; meanwhile, the rotation angle of the bottom frame is limited by designing a central disc structure, the phenomenon that the bottom frame is stressed to deflect at an overlarge angle is avoided, and the whole device has good structural strength and usability.

Drawings

Fig. 1 is a schematic overall appearance of the present invention.

Fig. 2 is a schematic structural view of the head frame of the present invention.

Fig. 3 is a schematic structural view of the chassis of the present invention.

Fig. 4 is a schematic cross-sectional view of the reset lever portion at the junction of the top frame and the bottom frame of the present invention.

Figure 5 is a schematic view of the assembly of the center disk of the present invention.

FIG. 6 is a schematic view of the assembly of the mandrel with the end cap of the present invention.

List of reference numerals:

a top frame 1;

the device comprises a top frame through hole 1-1, a top frame limiting groove 1-2, a fixing stud 1-3, a top frame assembling hole 1-4, a top frame rotating shaft 1-5, a reset rod 1-6, a reset ring 1-7, a lifting lug 1-8 and a reinforcing sheet 1-9;

a central disc 2;

the device comprises a first disc 2-1, a second disc 2-2, a central disc through hole 2-3, a central disc limiting groove 2-4, a central disc assembling hole 2-5, a central disc sliding hole 2-6, a first abutting block 2-7 and a second abutting block 2-8;

a chassis 3;

3-1 of a through hole of the chassis, 3-2 of a limiting shaft, 3-3 of a reset sliding cavity, 3-4 of a reset chute, 3-5 of a reset spring and 3-6 of a shaft end block;

a hoisting ring 4;

a central shaft 5;

a rotating section 5-1, a limiting section 5-2 and a central shaft clamping groove 5-3;

an engaging member 6;

an end cap 7;

the sleeve cap 7-1, the flange 7-2, the sleeve hole 7-3 and the sleeve groove 7-4;

a first bolt 8;

a second bolt 9.

Detailed Description

In order to make the technical scheme of the invention clearer and clearer, the invention is further described with reference to the accompanying drawings, and any scheme obtained by carrying out equivalent replacement and conventional reasoning on the technical characteristics of the technical scheme of the invention falls into the protection scope of the invention. The fixed connection, the fixed arrangement and the fixed structure mentioned in the embodiment are known technologies known to those skilled in the art, such as gluing, welding, screwing, bolt-nut connection, riveting and the like.

The figures are combined, so that the special opening and closing rope balancing device for the log grab bucket operation of the gantry crane comprises a top frame 1, a central disc 2, an underframe 3, a hanging ring 4, a central shaft 5, an embedded part 6, an end cover 7, a first bolt 8 and a second bolt 9;

the centers of two side wall surfaces of the top frame 1 are in a through hole shape to form a top frame through hole 1-1, and two sides of each side of the top frame through hole 1-1 are in a notch shape to form a top frame limiting groove 1-2; the outer side wall surface of each side of the top frame through hole 1-1 is provided with a fixing stud 1-3, and the fixing stud 1-3 is welded and vertically fixed with the wall surface of the top frame 1; the top end of the side wall surface of the top frame 1 is provided with a top frame assembly hole 1-4; two sides of the top surface of the top frame 1 are provided with top frame rotating shafts 1-5, and the top frame rotating shafts 1-5 and the top frame 1 are rotatably arranged; the side wall of the middle end of the top frame rotating shaft 1-5 is provided with a reset rod 1-6, the reset rod 1-6 is vertically fixed with the top frame rotating shaft 1-5, the side wall surface of the reset rod 1-6 is in a convex structure in the circumferential direction to form a reset ring 1-7, and the reset ring 1-7 is fixedly arranged with the reset rod 1-6; lifting lugs 1-8 are arranged on the top surfaces of two ends of the top frame 1, and the lifting lugs 1-8 are vertically fixed with the top frame 1;

the central disc 2 is arranged in the center of the top side of the top frame 1, the central disc 2 comprises a first disc 2-1 and a second disc 2-2, the centers of the first disc 2-1 and the second disc 2-2 are both in a through hole shape to form a central disc through hole 2-3, two sides of the central disc through hole 2-3 on each side are in a notch shape to form a central disc limiting groove 2-4, central disc assembling holes 2-5 are circumferentially arranged on outer rings of the first disc 2-1 and the second disc 2-2, and central disc sliding holes 2-6 are arranged on the bottom sides of the first disc 2-1 and the second disc 2-2; a first abutting block 2-7 is arranged on one side wall surface of the first disc 2-1, the first abutting block 2-7 is fixedly arranged with the first disc 2-1, a second abutting block 2-8 is further arranged on one side wall surface of the first disc 2-1, the second abutting block 2-8 is fixedly arranged with the first disc 2-1, and the central disc assembly hole 2-5 penetrates through the first abutting block 2-7 and the second abutting block 2-8 respectively; the first disc 2-1 and the second disc 2-2 are oppositely arranged, the first abutting block 2-7 and the second abutting block 2-8 abut against the side wall surface of the second disc 2-2, the central disc 2 is assembled and fixed by penetrating through the central disc assembling holes 2-5 at two sides of the first disc 2-1 and the second disc 2-2 through the first bolt 8, and the central disc 2 is assembled and fixed by penetrating through the top frame assembling holes 1-4 and the top side central disc assembling holes 2-5 through the second bolt 9;

the bottom frame 3 is arranged in the center of the central disc 2, the middle end of the bottom frame 3 is embedded between the first disc 2-1 and the second disc 2-2, the bottom end of the bottom frame 3 extends out of the bottom end of the central disc 2, and the top end of the top frame 1 extends out of the top ends of the two sides of the central disc 2 and into the two sides of the top frame 1; the center of the bottom frame 3 is in a through hole shape, and a bottom frame through hole 3-1 is formed; two wall surfaces at the bottom end of the bottom frame 3 are provided with limiting shafts 3-2, the limiting shaft 3-2 at each side is vertically fixed with the bottom frame 3, and the limiting shafts 3-2 extend into the central disc sliding holes 2-6; the top ends of two sides of the bottom frame 3 are of a hollow structure to form a reset sliding cavity 3-3, two ends of the reset sliding cavity 3-3 are of a hollow structure to form a reset sliding groove 3-4, the top frame rotating shaft 1-5 penetrates through the reset sliding groove 3-4, the reset rod 1-6 extends into the reset sliding cavity 3-3, and the reset ring 1-7 and the reset sliding cavity 3-3 are arranged in a sliding mode; a reset spring 3-5 is arranged in the reset sliding cavity 3-3, one end of the reset spring 3-5 is abutted against the end face of the reset sliding cavity 3-3, and one end of the reset spring 3-5 is abutted against the end face of the reset ring 1-7; the hanging rings 4 are arranged at two ends of the bottom side of the underframe 3;

the central shaft 5 comprises a rotating section 5-1 and a limiting section 5-2, the limiting section 5-2 is arranged on the end faces of two ends of the rotating section 5-1, and the two limiting sections 5-2 and the rotating section 5-1 are coaxially arranged and are in an integrated structure; two side walls of each rotating section 5-1 are in a groove-shaped structure to form a central shaft clamping groove 5-3; the central shaft clamping grooves 5-3 of the rotating sections 5-1 at each end are oppositely arranged; the embedded part 6 can be embedded into the central shaft clamping groove 5-3 for fixation; the central shaft 5 is arranged at the bottom end of the bottom frame 3, the rotating section 5-1 is embedded into the bottom frame through hole 3-1, the limiting sections 5-2 at two ends respectively penetrate through the central disc through hole 2-3 and the top frame through hole 1-1 in sequence, the embedded part 6 is respectively embedded into the central disc limiting groove 2-4 and the top frame limiting groove 1-2, the rotatable arrangement of the bottom frame 3 and the central shaft 5 is realized, and the central disc 2, the top frame 1 and the central shaft 5 are fixed in a limiting manner;

the end covers 7 are arranged on the outer wall surfaces of two sides of the top frame 1, each end cover 7 comprises a sleeving cap 7-1 and a flange 7-2, and each flange 7-2 is arranged on the outer wall surface of one end of each sleeving cap 7-1 and is fixedly arranged with the corresponding sleeving cap 7-1; the center of the sleeve cap is in a groove shape to form a sleeve hole 7-3, the sleeve hole is communicated with the flange 7-2, two side walls of the sleeve hole 7-3 are in a groove shape to form a sleeve groove 7-4, the flange 7-2 is attached to two side wall surfaces of the top frame 1 respectively, the limiting section 5-2 extends into the sleeve hole 7-3, the embedded parts 6 are embedded into the sleeve grooves 7-4 respectively, the fixing studs 1-3 penetrate through the flange 7-2 and are matched with nuts to fix the end cover 7 and the top frame 1, and the end cover 7 limits the central shaft 5.

Furthermore, the cross section of the top frame 1 is of an inverted U-shaped structure, the bottom edges of two sides of the top frame 1 are of a convex structure and are of an arc shape, and the top frame through hole 1-1 is arranged in the arc center of each side of the top frame 1; the two ends of the top surface of the top frame 1 are convex, and the top frame rotating shafts 1-5 are arranged at the convex parts at the two ends of the top frame 1.

Furthermore, reinforcing sheets 1-9 are arranged on the inner top surface of the top frame 1, the reinforcing sheets 1-9 are arranged in a transverse array, and the plurality of reinforcing sheets 1-9 are supported on the inner side wall of the top frame 1 and are welded and fixed with the inner wall surface of the top frame 1.

Further, the first abutting block 2-7 is arranged at the top end of the side wall of the first disc 2-1, the first abutting block 2-7 is of an arc-shaped structure, and the shape of the first abutting block 2-7 is matched with the shape of the first disc 2-1.

Furthermore, the number of the second abutting blocks 2-8 is two, and the second abutting blocks are respectively arranged on two sides of the bottom end of the side wall of the first disc 2-1 and are symmetrically arranged; the second abutting blocks 2-8 on each side are of fan-shaped structures.

Further, the central disc sliding hole 2-6 is of a waist-shaped hole structure and is in an arc shape; the diameter of the limiting shaft 3-2 is matched with the inner diameter of the central disc sliding hole 2-6, and the limiting shaft 3-2 is arranged in the central disc sliding hole 2-6 in a sliding manner; the end part of the limiting shaft 3-2 is provided with a shaft end block 3-6, the shaft end block 3-6 is fixedly arranged with the limiting shaft 3-2 at each side, the diameter of the shaft end block 3-6 is larger than that of the limiting shaft 3-2, and the shaft end block 3-6 is attached to the outer side wall surface of the central disc 2.

Further, the cross section of the bottom frame 3 is of an I-shaped structure, and the thickness of the bottom end of the bottom frame 3 is larger than the thickness of the center of the bottom frame 3; the top ends of two sides of the bottom frame 3 are in an L-shaped structure and are obliquely arranged, and the thickness of the top ends of the two sides of the bottom frame 3 is larger than the thickness of the center of the bottom frame 3 and is matched with the width of the side wall surfaces of the top frame 1.

Furthermore, the diameter and the width of the rotating section 5-1 are adapted to the inner diameter and the depth of the through hole 3-1 of the underframe; the diameter of the limiting section 5-2 is matched with the inner diameters of the central disc through hole 2-3 and the top frame through hole 1-1, and the end face of the limiting section 5-2 extends out of the outer wall face of the top frame 1.

Furthermore, each side of the central shaft clamping groove 5-3 is of a waist-shaped groove structure, the embedded piece 6 is of a waist-shaped block structure, the shape and size of the embedded piece 6 are matched with those of the central shaft clamping groove 5-3, and the thickness of the embedded piece 6 is larger than the groove depth of the central shaft clamping groove 5-3.

Furthermore, the length of the sleeve hole 7-3 extending into the wall surface of the top frame 1 is larger than the length of the limiting section 5-2 extending out of the wall surface of the top frame, and the inner diameter of the sleeve hole 7-3 is matched with the outer diameter of the limiting section 5-2.

The assembly principle of the invention is as follows:

1) the central disc, the central shaft and the underframe are assembled; the underframe is embedded in one side wall surface of the first disc, embedding pieces are embedded at two ends of the central shaft, the central shaft penetrates through the central disc through hole and the underframe through hole, the rotating section is embedded in the underframe through hole, the limiting section is embedded in the central disc through hole for limiting, and the limiting shaft extends into the central disc sliding hole; then, welding and fixing the shaft end block and the limiting shaft; penetrating a first bolt through assembling holes of the central discs on the two sides, and clamping and limiting the central discs to the underframe by matching nuts;

2) the bottom frame is assembled with the top frame rotating shaft; embedding a reset spring into the reset sliding cavity, penetrating the rotating shaft of the top frame through the reset sliding chute, embedding a reset rod and a reset ring into the reset sliding cavity, and abutting the reset ring against the reset spring;

3) assembling the bottom frame, the central disc and the top frame; attaching the top frame to two side wall surfaces of the central disc, wherein two side limiting sections of the central shaft respectively penetrate through holes of the top frame, embedding the embedded parts into limiting grooves of the top frame for fixation, simultaneously extending the limiting shafts into two side top ends of the top frames at two sides, welding and fixing the top frames at two sides to form an integral form, simultaneously welding reinforcing sheets on the side wall surfaces of the top frames, and limiting the top frames, the central disc and the bottom frame; penetrating a second bolt through the top frame assembling holes on the two sides and the top side central disc assembling hole, and matching with a nut to further position and fix the top frame and the central disc;

4) the top frame is limited and fixed with the center; the two end covers are respectively attached to two side wall surfaces of the top frame, the fixing stud penetrates through the flange, the flange is attached to the wall surface of the top frame, the limiting section and the embedded part respectively extend into the nesting hole and the nesting groove, and the end covers are fixed to the top frame through nuts, so that the end parts of the end covers to the central shaft are fixed.

The use principle of the invention is as follows:

when the device is not loaded, the underframe rotates with the outer side of the central shaft, and the underframe is in a horizontal state under the action of gravity of the underframe;

when the device is loaded, two ends of the top frame are connected with the steel wire rope through the lifting lugs, the bottom end of the bottom frame is connected with the steel wire rope through the lifting rings, after one end of the bottom frame is stressed unevenly, one end of the bottom frame descends, the bottom frame rotates on the outer side of the central shaft to automatically adjust the position of the steel wire rope, the limiting shaft slides in the sliding hole of the central disc, a rotating shaft of the top frame on one side of the top frame rotates, the reset ring abuts against the reset spring to be compressed, and the tilting end of the bottom frame is in a damping; when the rotation angle of the bottom frame is too large, the two sides of the bottom frame are limited by the first abutting block and the second abutting block, so that the bottom frame is prevented from being stressed and deflected too much; when the stress is balanced, the chassis is quickly adjusted to be in a horizontal state under the action of self gravity and the elastic force of the return spring.

The invention has the beneficial effects that:

the invention designs a balance frame structure aiming at the opening and closing steel wire rope between a gantry crane and a lifting appliance, the balance frame structure realizes the pressure regulation of the steel wire ropes on the two sides of the balance frame through the assembly of a plurality of components including a top frame, a bottom frame and a central disc, the balance frame can rotate in a self-adaptive manner to regulate the stress after the steel wire ropes are stressed unevenly, the opening and closing steel wire ropes are always kept in a stress balanced state, the opening and closing steel wire ropes can be kept to be lifted in a stable state, the opening and closing steel wire ropes are effectively prevented from being wound and knotted, the smooth operation of the lifting process is kept, meanwhile, the repeated falling, opening and closing operations are avoided, the production efficiency is improved, and the device has good stability and process efficiency.

The balance frame is arranged aiming at the structure of the balance frame, the top frame and the bottom frame of the balance frame are designed to be in a flexible structure mode with a return spring in an abutting mode, and the stability of the adjusting process when the bottom frame rotates under stress is guaranteed; meanwhile, the rotation angle of the bottom frame is limited by designing a central disc structure, the phenomenon that the bottom frame is stressed to deflect at an overlarge angle is avoided, and the whole device has good structural strength and usability.