Lifting mechanism of double-beam bridge crane

Abstract

The utility model discloses a lifting mechanism of a double-beam bridge crane, which belongs to the technical field of cranes and comprises a first beam bridge body and a second beam bridge body, guide rails are mounted on the upper surfaces of the roots of the first beam bridge body and the second beam bridge body, and the guide rails are connected with the first beam bridge body and the second beam bridge body. A first connecting base is arranged below the center line between the first beam bridge body and the second beam bridge body, a connecting frame is welded to the middle of the upper surface of the first connecting base, the top end of the connecting frame is rotationally connected with a transmission shaft through a bearing, and rolling wheels in rolling connection with the guide rails are installed at the two ends of the transmission shaft correspondingly. According to the lifting mechanism, the problem of the defects of lead screw conveying is effectively solved, and it is guaranteed that the lifting mechanism can normally conduct lifting operation on goods.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, and more specifically to a lifting mechanism of a double-beam bridge crane. Background Art

[0002] Double-girder crane generally refers to double-girder bridge crane. Double-girder crane is generally composed of three major parts: mechanical, electrical and metal structure. The appearance of bridge crane is like a single-span flat bridge supported at both ends on two parallel overhead tracks. Double-girder crane is widely used in indoor and outdoor industrial and mining enterprises, steel and chemical industry, railway transportation, port terminals and logistics turnover departments and places.

[0003] An existing patent is an electric double-beam bridge crane, with patent authorization number CN219217343U, which includes a bridge body one, a crane moving mechanism is installed on the side of the bridge body one, a bridge body two is installed on the other end of the crane moving mechanism, a crane is meshingly installed on the surface of the crane moving mechanism, a buffer mechanism is installed on the side of the crane, an electric hoist is installed at the lower end of the crane, a lifting rope is installed at the lower end of the electric hoist, and a hook is installed at the lower end of the lifting rope, which can improve the stability of the crane during the moving process, thereby ensuring its stability when lifting heavy objects, thereby reducing its safety hazards. In addition, the mechanism is provided with a driving component, which drives the large gear to rotate through the small gear, and can drive the screw rod one and the screw rod two to rotate more effortlessly.

[0004] However, the patent authorization number CN219217343U uses a screw for transmission. During the long-distance transmission process, impact vibration and excessive instantaneous load can easily cause the screw to break, thereby affecting the normal operation of the crane. Therefore, we proposed a double-beam bridge crane lifting mechanism to solve the above problems. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the problems existing in the prior art, the purpose of the utility model is to provide a lifting mechanism of a double-beam bridge crane, which effectively solves the shortcomings of screw transmission to ensure that the lifting mechanism can normally lift and operate the goods.

[0007] 2. Technical solution

[0008] To solve the above problems, the utility model adopts the following technical solutions.

[0009] A double-beam bridge crane lifting mechanism comprises a first beam bridge body and a second beam bridge body, wherein the first beam bridge body and the second beam bridge body are both provided with guide rails on their root upper surfaces;

[0010] A first connecting seat is arranged below the center line between the first beam bridge body and the second beam bridge body, a connecting frame is welded to the middle of the upper surface of the first connecting seat, a transmission shaft is rotatably connected to the top of the connecting frame through a bearing, rollers rollingly connected to the guide rail are installed at both ends of the transmission shaft, and a driven bevel gear is installed on the outer wall of the transmission shaft;

[0011] A reduction motor fixedly connected to the first connection seat is arranged at one side of the root of the connection frame, and a driving bevel gear meshing with the driven bevel gear is installed at the power output end of the reduction motor;

[0012] An electric hoist is installed on the lower surface of the first connecting seat, a lifting rope is installed on the transmission end of the electric hoist, and a lifting hook is connected to the end of the lifting rope.

[0013] Furthermore, the connecting frame is rotatably connected to a shaft rod at a root away from the reduction motor through a bearing;

[0014] A mounting seat is welded at the end of the shaft rod, and a first connecting shaft is fixedly connected to the end of the upper surface of the mounting seat via a bracket;

[0015] A notch is arranged at the end of the lower surface of the mounting seat, and a second connecting shaft is fixedly connected to the inner side of the notch.

[0016] Furthermore, a second connecting seat is rotatably connected to the first connecting shaft, a mounting plate is connected to the top end of the second connecting seat, and a brake pad is installed on the upper surface of the mounting plate.

[0017] Furthermore, a wear-resistant ceramic sheet is installed at a position on the bottom of the first beam bridge body corresponding to the brake pad.

[0018] Furthermore, a third connecting shaft fixedly connected to the first connecting seat via a bracket is provided below the second connecting shaft, and a double-acting cylinder is installed between the third connecting shaft and the second connecting shaft.

[0019] Furthermore, connecting ears are installed at both ends of the double-acting cylinder, and the connecting ears are rotatably connected to the third connecting shaft and the second connecting shaft respectively.

[0020] Furthermore, a damping rubber sleeve is provided on the outer side of the first connecting shaft, and the damping rubber sleeve is in contact with the second connecting seat.

[0021] 3. Beneficial effects

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] (1) This scheme uses a hook set at the bottom of the lifting rope to hang the cargo, and then uses an electric hoist to reel in the lifting rope to lift the cargo. The power output end of the reduction motor drives the active bevel gear to rotate, and the active bevel gear meshes with the driven bevel gear, thereby driving the transmission shaft to rotate in coordination with the connecting frame, and then the rollers roll in coordination with the guide rails to translate the lifted cargo, effectively solving the shortcomings of the screw transmission to ensure that the lifting mechanism can normally lift the cargo.

[0024] (2) In this solution, a double-acting cylinder is connected to an external pneumatic control device, and the pneumatic control device is used to control the extension and retraction of the movable end of the double-acting cylinder. After the cargo is hoisted and moved to the specified position, the movable end of the double-acting cylinder is contracted to rotate the shaft rod in coordination with the connecting frame, and the mounting plate moves upward. At the same time, the second connecting seat is rotated in coordination with the first connecting shaft, so that the brake pad abuts against the wear-resistant ceramic plate, thereby braking the first connecting seat to prevent the first connecting seat from continuing to move under the action of inertia, which is conducive to placing the cargo at the specified position. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the first connecting seat of the utility model;

[0027] Figure 3 It is a front view schematic diagram of the mounting base of the utility model;

[0028] Figure 4 It is a schematic cross-sectional view of the AA portion of the mounting base of the utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the wear-resistant ceramic sheet of the utility model.

[0030] Description of the numbers in the figure:

[0031] 1. The first beam bridge body; 2. The second beam bridge body; 3. Guide rails; 4. The first connecting seat; 5. The connecting frame; 6. The transmission shaft; 7. The roller; 8. The driven bevel gear; 9. The reduction motor; 10. The driving bevel gear; 11. The electric hoist; 12. The lifting rope; 13. The lifting hook; 14. The mounting seat; 15. The first connecting shaft; 16. The damping rubber sleeve; 17. The mounting plate; 18. The second connecting seat; 19. The brake pad; 20. The second connecting shaft; 21. The double-acting cylinder; 22. The shaft; 23. The third connecting shaft; 24. The wear-resistant ceramic plate. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0033] Example:

[0034] See also Figure 1-5 A double-beam bridge crane lifting mechanism comprises a first beam bridge body 1 and a second beam bridge body 2, wherein the first beam bridge body 1 and the second beam bridge body 2 are both provided with guide rails 3 on their root upper surfaces;

[0035] A first connecting seat 4 is arranged below the center line between the first beam bridge body 1 and the second beam bridge body 2, a connecting frame 5 is welded to the middle of the upper surface of the first connecting seat 4, a transmission shaft 6 is rotatably connected to the top of the connecting frame 5 through a bearing, rollers 7 rollingly connected to the guide rail 3 are installed at both ends of the transmission shaft 6, and a driven bevel gear 8 is installed on the outer wall of the transmission shaft 6;

[0036] A reduction motor 9 fixedly connected to the first connection seat 4 is arranged at one side of the root of the connection frame 5, and a driving bevel gear 10 meshing with the driven bevel gear 8 is installed at the power output end of the reduction motor 9;

[0037] An electric hoist 11 is installed on the lower surface of the first connecting seat 4, a lifting rope 12 is installed on the transmission end of the electric hoist 11, and a lifting hook 13 is connected to the end of the lifting rope 12;

[0038] It should be noted that when the double-beam bridge crane lifting mechanism is in use, the control device is connected to the reduction motor 9, and the control device is used to set the forward and reverse rotation program for the output end of the reduction motor 9;

[0039] The goods are hung by using the hook 13 arranged at the bottom of the lifting rope 12, and then the lifting rope 12 is rolled up by the electric hoist 11 to lift the goods. The driving bevel gear 10 is driven to rotate by the power output end of the reduction motor 9, and the driving bevel gear 10 is meshed with the driven bevel gear 8, thereby driving the transmission shaft 6 to rotate in coordination with the connecting frame 5, and then the roller 7 rolls in coordination with the guide rail 3 to translate the lifted goods, which effectively solves the shortcomings of the screw transmission to ensure that the lifting mechanism can normally lift the goods.

[0040] Furthermore, the connecting frame 5 is rotatably connected to a shaft 22 at the root away from the reduction motor 9 through a bearing, and a mounting seat 14 is welded to the end of the shaft 22. The upper surface end of the mounting seat 14 is fixedly connected to a first connecting shaft 15 through a bracket, and a notch is provided at the end of the lower surface of the mounting seat 14, and a second connecting shaft 20 is fixedly connected to the inner side of the notch;

[0041] The first connecting shaft 15 is rotatably connected to a second connecting seat 18, a top end of the second connecting seat 18 is connected to a mounting plate 17, and a brake pad 19 is mounted on the upper surface of the mounting plate 17;

[0042] A wear-resistant ceramic sheet 24 is installed at the bottom of the first bridge body 1 corresponding to the brake pad 19;

[0043] A third connecting shaft 23 fixedly connected to the first connecting seat 4 through a bracket is provided below the second connecting shaft 20, and a double-acting cylinder 21 is installed between the third connecting shaft 23 and the second connecting shaft 20;

[0044] Both ends of the double-acting cylinder 21 are provided with connecting ears, and the connecting ears are rotatably connected to the third connecting shaft 23 and the second connecting shaft 20 respectively;

[0045] It should be noted that, by connecting the double-acting cylinder 21 to an external pneumatic control device, the pneumatic control device is used to control the extension and retraction of the movable end of the double-acting cylinder 21. After the cargo is hoisted and moved to the specified position, the movable end of the double-acting cylinder 21 is contracted to make the shaft rod 22 rotate in coordination with the connecting frame 5, and the mounting plate 17 moves upward. At the same time, the second connecting seat 18 rotates in coordination with the first connecting shaft 15, so that the brake pad 19 abuts against the wear-resistant ceramic plate 24, thereby braking the first connecting seat 4 to prevent the first connecting seat 4 from continuing to move under the action of inertia, which is conducive to placing the cargo at the specified position.

[0046] like Figure 4 As shown, a damping rubber sleeve 16 is sleeved on the outer side of the first connecting shaft 15, and the damping rubber sleeve 16 abuts against the second connecting seat 18;

[0047] It should be noted that the friction between the second connecting seat 18 and the first connecting shaft 15 is increased by using the damping rubber sleeve 16 , thereby reducing the swing amplitude of the mounting plate 17 , which is beneficial for the brake pad 19 to fit with the wear-resistant ceramic sheet 24 .

[0048] When in use: the control device is connected to the reduction motor 9, and the control device is used to set the forward and reverse rotation program for the output end of the reduction motor 9;

[0049] The goods are hung by using the hook 13 arranged at the bottom of the lifting rope 12, and then the lifting rope 12 is rolled up by the electric hoist 11 to lift the goods. The driving bevel gear 10 is driven to rotate by the power output end of the reduction motor 9, and the driving bevel gear 10 is engaged with the driven bevel gear 8, thereby driving the transmission shaft 6 to rotate in coordination with the connecting frame 5, and then the roller 7 rolls in coordination with the guide rail 3 to translate the lifted goods.

[0050] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A double-beam bridge crane lifting mechanism, comprising a first beam bridge body (1) and a second beam bridge body (2), characterized in that: Guide rails (3) are installed on the upper surfaces of the roots of the first beam bridge body (1) and the second beam bridge body (2); A first connecting seat (4) is arranged below the center line between the first beam bridge body (1) and the second beam bridge body (2); a connecting frame (5) is welded to the middle of the upper surface of the first connecting seat (4); a transmission shaft (6) is rotatably connected to the top of the connecting frame (5) via a bearing; rollers (7) rollingly connected to the guide rail (3) are mounted at both ends of the transmission shaft (6); and a driven bevel gear (8) is mounted on the outer wall of the transmission shaft (6); A reduction motor (9) fixedly connected to the first connection seat (4) is provided on one side of the root of the connection frame (5); a driving bevel gear (10) meshing with the driven bevel gear (8) is installed at the power output end of the reduction motor (9); An electric hoist (11) is installed on the lower surface of the first connecting seat (4), a lifting rope (12) is installed on the transmission end of the electric hoist (11), and a lifting hook (13) is connected to the end of the lifting rope (12).

2. A double-beam bridge crane lifting mechanism according to claim 1, characterized in that: The connecting frame (5) is rotatably connected to a shaft (22) at a root portion away from the reduction motor (9) via a bearing; A mounting seat (14) is welded to the end of the shaft rod (22), and a first connecting shaft (15) is fixedly connected to the end of the upper surface of the mounting seat (14) via a bracket; A notch is provided at the end of the lower surface of the mounting seat (14), and a second connecting shaft (20) is fixedly connected to the inner side of the notch.

3. A double-beam bridge crane lifting mechanism according to claim 2, characterized in that: The first connecting shaft (15) is rotatably connected to a second connecting seat (18), the top end of the second connecting seat (18) is connected to a mounting plate (17), and a brake pad (19) is mounted on the upper surface of the mounting plate (17).

4. A double-beam bridge crane lifting mechanism according to claim 3, characterized in that: A wear-resistant ceramic sheet (24) is installed at a position on the bottom of the first beam bridge body (1) corresponding to the brake pad (19).

5. The double-beam bridge crane lifting mechanism according to claim 3, characterized in that: A third connecting shaft (23) is arranged below the second connecting shaft (20) and is fixedly connected to the first connecting seat (4) via a bracket, and a double-acting cylinder (21) is installed between the third connecting shaft (23) and the second connecting shaft (20).

6. A double-beam bridge crane lifting mechanism according to claim 5, characterized in that: Both ends of the double-acting cylinder (21) are provided with connecting ears, and the connecting ears are rotatably connected to the third connecting shaft (23) and the second connecting shaft (20) respectively.

7. A double-beam bridge crane lifting mechanism according to claim 3, characterized in that: A damping rubber sleeve (16) is sleeved on the outer side of the first connecting shaft (15), and the damping rubber sleeve (16) is in abutment with the second connecting seat (18).

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