Drag chain traction mechanism of crane

Abstract

The utility model relates to the technical field of crane drag chain equipment, and discloses a crane drag chain traction mechanism which comprises a cable guide groove and a moving trolley which are installed on a crane, a cable supporting chain is arranged in the cable guide groove, a traction frame is installed on the moving trolley, a traction head is installed below the traction frame, and the traction head is connected with the cable supporting chain. A floating head is installed on the cable drag chain, at least one traction assembly is installed between the traction head and the floating head, and each traction assembly comprises an upper shaft seat installed below the traction head, a lower shaft seat installed below the floating head and a connecting rod rotationally installed between the upper shaft seat and the lower shaft seat through a pin shaft. The axis direction of the pin shaft is the same as the moving direction of the drag chain, and the connecting rod is perpendicular to the moving direction of the drag chain. Omni-directional adjustment of the floating head is achieved, stable operation precision and efficiency of the drag chain and fault-tolerant capability of installation are improved, and faults of the drag chain are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of crane drag chain equipment, in particular to a crane drag chain traction mechanism. Background Art

[0002] See the appendix Figure 6 , for the mobile trolley 200 on the main structure 100 of the crane, its power cables, control cables and communication cables are all arranged on the cable drag chain. Since the mobile trolley 200 is mobile, one end of the cables on the cable drag chain is connected to the junction box on the crane main body, and the other end is connected to the junction box on the main body of the mobile trolley 200. The middle part of the cables is on the drag chain and is pulled by the drag chain traction head, moving along with the movement of the trolley.

[0003] See the appendix Figure 7 , during the movement of the trolley, due to the unevenness of the two sides of the track and the straightness of the track, as well as the off-center load of the lifting load and the unevenness of the ground where the crane is located, when the trolley travels on the track, there is a horizontal offset in the direction perpendicular to the track. The drag chain guide groove 300 is parallel to the track and fixed on the main structure of the crane, while the drag chain traction head 400 is fixed on the mobile trolley structure. Therefore, when the drag chain traction head 400 pulls the drag chain to move, there is also a horizontal offset in the direction perpendicular to the drag chain guide groove 300. Since the drag chain can only bear the traction force along the moving direction of the drag chain and cannot bear the lateral horizontal force perpendicular to the moving direction of the drag chain, although there are horizontal guide wheels designed on the drag chain traction head to relieve the impact force and frictional resistance caused by the deviation of the drag chain, the horizontal guide wheels and the drag chain traction head are also subject to frequent lateral forces, reducing their service life and further affecting the life of the drag chain.

[0004] To solve the above problems, currently, some traction heads have added linear bearings to eliminate the lateral horizontal deviation, making the traction head a floating traction head.

[0005] See the appendix Figure 8 , 9 , by setting a linear bearing 500 perpendicular to the moving direction of the drag chain between the traction head and the floating head, the displacement generated by the lateral movement of the drag chain can be eliminated, that is, the traction head has a one-way floating function along the axial direction of the linear bearing.

[0006] See the appendix Figure 10 , since the traction frame is connected to the support welded on the mobile trolley structure by flange bolts, if there is an angle between the flange surface of the support and the drag chain guide groove, or there is an error in the manufacture of the inverted U-shaped traction frame, an angle α2 appears between the traction head 400 and the drag chain guide groove 300, causing the drag chain to be in a twisted state and affecting its service life.

[0007] See the appendix Figure 11, Since the drag chain guide bracket 600 is welded to the overall structure of the machine, if the upper surface of the inverted L-shaped drag chain guide bracket is not horizontal, resulting in a deflection angle α1, and if the guide groove is not carefully adjusted during installation, the guide groove will be distorted. During the movement of the drag chain in the travel of the moving trolley, the drag chain will be distorted along with the drag chain guide groove, affecting the service life of the drag chain. Summary of the Invention

[0008] The purpose of the present invention is to solve the above problems, provide a crane drag chain traction mechanism, realize the omnidirectional adjustability of the floating head, improve the stable operation accuracy and efficiency of the drag chain, enhance the installation fault tolerance of the floating head, and reduce drag chain failures.

[0009] The technical solution adopted by the present invention is:

[0010] A crane drag chain traction mechanism includes a cable guide groove and a moving trolley installed on the crane. A cable drag chain is arranged in the cable guide groove. A traction frame is installed on the moving trolley. It is characterized in that a traction head is installed below the traction frame, a floating head is installed on the cable drag chain, and at least one traction component is installed between the traction head and the floating head. The traction component includes an upper shaft seat installed below the traction head, a lower shaft seat installed below the floating head, and a connecting rod rotatably installed between the upper and lower shaft seats through a pin shaft. The axial direction of the pin shaft is the same as the movement direction of the drag chain, and the connecting rod is perpendicular to the movement direction of the drag chain.

[0011] Further, the connecting rod includes an upper end head, a lower end head and a pipe section. Both the lower end head and the lower end head are flat head bolts. A shaft hole is opened at the flat head end of the flat head bolt for rotatable connection with the upper shaft seat and the lower shaft seat through a pin shaft. Threads are provided at both ends of the pipe section of the connecting rod and are engaged with the bolt ends of the upper end head and the lower end head. The screw directions of the bolt sections of the upper end head and the lower end head are opposite.

[0012] Further, a part or all of the cross-section of the pipe section of the connecting rod is a regular hexagon or a square.

[0013] Further, the connecting rod is arranged in the vertical direction.

[0014] Further, there are multiple traction components, and the connecting rods of the multiple traction components are parallel to each other.

[0015] Further, the multiple traction components are arranged side by side in the movement direction of the drag chain.

[0016] Further, the moving trolley is arranged on the main structure of the crane, the side of the main structure is provided with a cable guide groove bracket through a support frame, and the cable guide groove is installed on the cable guide groove bracket.

[0017] Further, a first power connection box is installed on the side of the cable guide trough bracket, and a second power connection box is installed on the trolley. The cable is led out from the first power connection box and connected to the second power connection box after passing through the cable drag chain.

[0018] Further, the cable on one side of the second power connection box is routed along the traction frame and connected to the second power connection box.

[0019] Further, a cable support is installed on the traction frame, and the cable is fixed on the cable support.

[0020] The beneficial effects of the present utility model are as follows:

[0021] (1) The traction head and the floating head can absorb the displacement of the drag chain guide trough in the left and right directions through the traction assembly, avoiding lateral force on the cable drag chain during movement;

[0022] (2) By multiple sets of independent traction assemblies connecting multiple cable drag chains, the tensile force on the cable drag chains is more evenly distributed;

[0023] (3) The wear of the drag chain caused by lateral force is reduced, the service life is improved, and the possibility of failure is reduced. Description of the Drawings

[0024] Att Figure 1 is the schematic plan view of the present utility model (cable omitted);

[0025] Att Figure 2 is Figure 1 the partial enlarged view of A in the attachment;

[0026] Att Figure 3 is Figure 1 the view in the direction of B of the attachment;

[0027] Att Figure 4 is the schematic plan view of the present utility model (including the cable);

[0028] Att Figure 5 is the structural cross-sectional view of the traction assembly;

[0029] Att Figure 6 is the schematic layout diagram of the trolley on the main structure of the crane;

[0030] Att Figure 7 is the drag chain structure in the prior art without the function of eliminating offset;

[0031] Att Figure 8 、 9 is the drag chain structure in the prior art that eliminates offset through a linear shaft;

[0032] Att Figure 10 is the schematic structural diagram of the deflection angle between the traction head and the drag chain guide trough;

[0033] Attached Figure 11 is a schematic structural view of the deflection angle between the drag chain guide bracket and the drag chain guide.

[0034] The reference numerals in the attached drawings are respectively:

[0035] 1. Main structure; 2. Moving trolley;

[0036] 3. Traction frame; 4. Support frame;

[0037] 5. Cable guide bracket; 6. Cable guide;

[0038] 7. Cable drag chain; 8. First power connection box;

[0039] 9. Second power connection box; 10. Cable;

[0040] 11. Cable support; 12. Traction head;

[0041] 13. Floating head; 14. Traction assembly;

[0042] 15. Upper shaft seat; 16. Lower shaft seat;

[0043] 17. Pin shaft; 18. Connecting rod;

[0044] 19. Upper end head; 20. Lower end head;

[0045] 21. Pipe section; 100. Main structure;

[0046] 200. Moving trolley; 300. Drag chain guide;

[0047] 400. Drag chain traction head; 500. Linear bearing;

[0048] 600. Drag chain guide bracket. Specific embodiments

[0049] The following will make a detailed description of the specific embodiments of the crane drag chain traction mechanism of the present utility model in conjunction with the attached drawings.

[0050] See attached Figures 1-3 , a moving trolley 2 is arranged on the main structure 1 of the crane, the moving trolley 2 moves on the slide rail of the main structure 1 of the crane, and a traction frame 3 is installed on the moving trolley 2. A cable guide bracket 5 is arranged on the side of the main structure 1 through a support frame 4, and the cable guide bracket 5 is used for installing a cable guide 6. The cable guide 6 is parallel to the slide rail of the moving trolley 2, and a cable drag chain 7 is arranged in the cable guide 6.

[0051] See attached Figure 4, a first power connection box 8 is installed on the side of the cable duct bracket 5, and a second power connection box 9 is installed on the moving trolley 2. The cable 10 is led out from the first power connection box 8, passes through the cable drag chain 7, and then is connected to the second power connection box 9. The cable 10 on one side of the second power connection box 9 is routed along the traction frame 3 and connected to the second power connection box 9. A cable support 11 is installed on the traction frame 3, and the cable 10 is fixed on the cable support 11.

[0052] A traction head 12 is installed below the traction frame 3 of the moving trolley 2, and a floating head 13 is installed on the cable drag chain 7. At least one traction assembly 14 is installed between the traction head 12 and the floating head 13. The traction assembly 14 includes an upper shaft seat 15 installed below the traction head 12, a lower shaft seat 16 installed below the floating head 13, and a connecting rod 18 rotatably installed between the upper and lower shaft seats 15 and 16 through a pin shaft 17. The axial direction of the pin shaft 17 is the same as the movement direction of the cable drag chain 7, and the connecting rod 18 is perpendicular to the movement direction of the cable drag chain 7. The position of the connecting rod 18 can be set obliquely or vertically.

[0053] When there are multiple traction assemblies 14, the connecting rods 18 of the multiple traction assemblies 14 are parallel to each other. If the connecting rod 18 is inclined, then multiple connecting rods 18 are inclined simultaneously. The multiple traction assemblies 14 are arranged side by side in the movement direction of the cable drag chain 7.

[0054] See the appendix Figure 5 , the connecting rod 18 includes an upper end head 19, a lower end head 20, and a pipe section 21. Both the upper end head 19 and the lower end head 20 are flat head bolts. The flat head end of the flat head bolt is provided with a shaft hole for rotatably connecting with the upper shaft seat 15 and the lower shaft seat 16 through the pin shaft 17. Threads are provided at both ends of the pipe section 21 of the connecting rod 18 and are engaged with the bolt ends of the upper end head 19 and the lower end head 20. The screw directions of the bolt sections of the upper end head 19 and the lower end head 20 are opposite. A part or all of the cross-section of the pipe section 21 of the connecting rod 18 is a regular hexagon or a square, which is used to rotate the pipe section 21 of the connecting rod 18 through a wrench to adjust the length of the connecting rod 18.

[0055] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A crane drag chain traction mechanism, comprising a cable guide trough and a moving trolley installed on the crane, wherein a cable drag chain is arranged in the cable guide trough, and a traction frame is installed on the moving trolley, characterized in that: A traction head is installed below the traction frame, a floating head is installed on the cable drag chain, and at least one traction assembly is installed between the traction head and the floating head. The traction assembly includes an upper shaft seat installed below the traction head, a lower shaft seat installed below the floating head, and a connecting rod rotatably installed between the upper and lower shaft seats through a pin shaft, the axial direction of the pin shaft is the same as the movement direction of the drag chain, and the connecting rod is perpendicular to the movement direction of the drag chain.

2. The crane drag chain traction mechanism according to claim 1, characterized in that: The connecting rod includes an upper end, a lower end and a pipe section, the lower end and the lower end are flat head bolts, the flat head end of the flat head bolt is provided with an axial hole, which is used to be rotatably connected with the upper shaft seat and the lower shaft seat through a pin shaft, and both ends of the pipe section of the connecting rod are provided with threads, which are engaged with the bolt ends of the upper end and the lower end, and the bolt sections of the upper end and the lower end have opposite rotation directions.

3. The crane drag chain traction mechanism according to claim 2, characterized in that: A part or all of the cross-section of the pipe section of the connecting rod is a regular hexagon or a square.

4. The crane drag chain traction mechanism according to any one of claims 1 to 3, characterized in that: The connecting rod is arranged in a vertical direction.

5. The crane drag chain traction mechanism according to any one of claims 1 to 3, characterized in that: There are multiple traction assemblies, and the connecting rods of the multiple traction assemblies are parallel to each other.

6. The crane drag chain traction mechanism according to claim 5, characterized in that: A plurality of traction components are arranged side by side in the moving direction of the drag chain.

7. The crane tow chain traction mechanism according to any one of claims 1 to 3, characterized in that: The moving trolley is arranged on the main structure of the crane, a cable guide groove bracket is arranged on the side of the main structure through a supporting frame, and the cable guide groove is installed on the cable guide groove bracket.

8. The crane drag chain traction mechanism according to claim 7, characterized in that: A first connection box is installed on the side of the cable guide bracket, and a second connection box is installed on the mobile trolley. The cable is connected from the first connection box and connected to the second connection box after passing through the cable drag chain.

9. The crane drag chain traction mechanism according to claim 8, characterized in that: The cables on one side of the second connection box are laid along the traction frame and connected to the second connection box.

10. The crane drag chain traction mechanism according to claim 9, characterized in that: A cable support is installed on the traction frame, and the cable is fixed on the cable support.

Images