Multi-stage balance beam trolley traveling mechanism

Abstract

The utility model discloses a multi-stage balance beam trolley traveling mechanism. A first-stage balance beam, a second-stage balance beam, a third-stage balance beam, a wheel frame and wheels are arranged on the two sides of a trolley body of a load trolley respectively. The wheels are connected with the second-stage balance beam through the wheel shafts, then the second-stage balance beam is connected with the first-stage balance beam through the shafts and the locking nuts, finally the first-stage balance beam is connected with the truck body of the load-carrying trolley through the shafts and the locking nuts, the two rows of wheels are symmetrically designed, and the eight wheels are arranged in total. The mechanism designed by the utility model is regulated and controlled through the multi-stage balance beam, and more wheels can be arranged, so that the wheel pressure of a single wheel is reduced, the excessive concentration of the overall stress is avoided, and the use requirements of an inverted triangular section type cargo boom are met.

Description

Technical Field

[0001] The utility model relates to the technical field of a load-carrying trolley traveling mechanism, in particular to a multi-stage balance beam trolley traveling mechanism. Background Art

[0002] With the development of large flat-top tower cranes, the structural forms of the booms are becoming more and more diverse. In order to match the various boom structures, it is a natural requirement to design a load-bearing trolley with better performance and wider applicability. The performance and adaptability of the load-bearing trolley are closely related to the traveling mechanism of the trolley. Therefore, there are still parts that need to be continuously optimized in the design process of the traveling mechanism of the flat-top tower crane load-bearing trolley.

[0003] During the lifting operation of the crane arm, the load-carrying trolley is an important operating device. The traveling mechanism of the load-carrying trolley is generally composed of a balance beam, wheels, wheel axles, bearings, connecting rods and fasteners. The wheels are assembled upward to the track of the lower chord of the crane arm for sliding. The balance beams are connected by shafts. The lowest balance beam is connected to the frame of the load-carrying trolley. The entire traveling mechanism is between the crane arm and the frame, playing an important role in connecting the upper and lower parts. At present, the traditional traveling mechanism of the load-carrying trolley generally adopts the structure of a two-level balance beam. However, since the two-level balance beam structure has fewer wheels, the load-bearing capacity is weak, and it is easy to cause problems such as excessive wheel pressure on a single wheel, the applicable surface is relatively narrow, especially not suitable for crane arms with inverted triangle cross-sections.

[0004] A multi-level balance beam trolley travel mechanism is designed for the inverted triangle cross-section boom. Through the multi-level balance beam regulation, more wheels can be arranged to reduce the wheel pressure of a single wheel and avoid excessive concentration of overall stress, thereby meeting the use requirements of the inverted triangle cross-section boom. Utility Model Content

[0005] The purpose of the utility model is to provide a multi-level balance beam trolley travel mechanism, which changes the traditional two-level balance beam arrangement into a multi-level balance beam structure. The original trolley travel mechanism is to connect the wheel with the second-level balance beam, and then the second-level balance beam is connected to the first-level balance beam, and finally the first-level balance beam is connected to the frame. An additional level of balance beam is arranged between the original first-level balance beam and the frame, and a roller frame is arranged on the newly arranged balance beam, so that one more set of wheels can be arranged.

[0006] In order to realize the above functions, the utility model designs a multi-level balance beam trolley walking mechanism, and a first-level balance beam 1, a second-level balance beam 2, a third-level balance beam 3, a wheel frame 4, and a wheel 5 are respectively arranged on both sides of the body of the load-carrying trolley;

[0007] For one side of the body of the load-carrying trolley, the secondary balance beam 2 and the wheel frame 4 are respectively fixedly connected to the primary balance beam 1 through a pin shaft 8, the tertiary balance beam 3 is fixedly connected to the secondary balance beam 2 through a pin shaft 8, and the wheels 5 are respectively arranged on the inner sides of the tertiary balance beam 3 and the wheel frame 4. The wheels 5 on the same side of the body of the load-carrying trolley are collinear, and the wheels 5 are respectively connected to the tertiary balance beam 3 and the wheel frame 4 through a wheel axle 6 and a matching bearing 17; the wheels 5 on both sides of the body of the load-carrying trolley are symmetrically positioned.

[0008] As a preferred technical solution of the utility model: the secondary balance beam 2 is a single-layer plate in an inverted triangle shape, the upper corner of which is connected to the third-level balance beam 3, and the lower corner is connected to the primary balance beam 1.

[0009] As a preferred technical solution of the utility model: the two upper corners of the secondary balance beam 2 are respectively connected to the two tertiary balance beams 3.

[0010] As a preferred technical solution of the utility model: the three-level balance beam 3 is a double-layer plate in an inverted triangle shape with a preset interval, the upper corner of the secondary balance beam 2 is located in the interval of the double-layer plate at the lower corner of the three-level balance beam 3, fixedly connected by a pin 8, and its top end is fastened by a pin locking nut 9; a tie rod 12 is fixedly arranged in the interval of the double-layer plate of the three-level balance beam 3, and the two upper corners of the three-level balance beam 3 are respectively axially connected to two wheels 5.

[0011] As a preferred technical solution of the utility model: the first-level balance beam 1 is a double-layer plate in an inverted triangle shape with a preset interval; the lower corner of the secondary balance beam 2 is located in the interval of the double-layer plate at the upper corner of the first-level balance beam 1, fixedly connected by a pin 8, and its top end is fastened by a pin locking nut 9; the lower corner of the first-level balance beam 1 is fixedly connected to the body of the load-carrying trolley by the pin 8; the pipe sleeve 15 is sleeved on the outside of the pin 8 at the lower corner of the first-level balance beam 1 to protect the pin 8, and a closed sealing plate 14 is welded inside the interval of the double-layer plate of the first-level balance beam 1.

[0012] As a preferred technical solution of the utility model: the primary balance beam 1 is made of high-strength steel plate.

[0013] As a preferred technical solution of the utility model: the wheel frame 4 is a single-layer plate in an inverted triangle shape, the lower corner of which is located in the double-layer plate interval of the primary balance beam 1, fixedly connected by a pin 8, and the two upper corners are respectively connected to the two wheels 5.

[0014] As a preferred technical solution of the utility model: each of the three-level balance beam 3 and the inner side of the wheel frame 4 has two wheels 5, and a partition plate 13 is fixedly arranged between the two wheels 5.

[0015] As a preferred technical solution of the utility model: each wheel 5 is connected to the three-level balance beam 3 and the wheel frame 4 respectively through a wheel axle 6, the wheel axle 6 has an external thread, the inner wall of the wheel axle locking nut 7 has an internal thread matching the external thread of the wheel axle 6, and is fastened to the top of the wheel axle 6, and the wheel axle 6 is connected to the oil cup 16 for supplying oil to the wheel axle 6 for lubrication.

[0016] As a preferred technical solution of the utility model: the secondary balance beam 2 and the wheel frame 4 on both sides of the body of the load-carrying trolley are fixedly connected by a connecting rod 10, the top of which has an external thread, and the inner wall of the connecting rod nut 11 has an internal thread matching the external thread of the connecting rod 10, which is fastened to the top of the connecting rod 10.

[0017] Beneficial effects: Compared with the prior art, the advantages of the utility model include:

[0018] In view of the following defects existing in the prior art:

[0019] 1. Too few wheels are arranged, resulting in a weak total load-bearing capacity, and the force on a single wheel is too large, and the wheel pressure is too large, which has a negative impact on the service life of the wheel itself and the boom track;

[0020] 2. The structure is fixed and can only be applied to a small range of working conditions. It is not adjustable and adaptable.

[0021] The utility model proposes a multi-stage balance beam trolley travel mechanism, which changes the traditional two-stage balance beam travel mechanism structure, adds a first-stage balance beam, and can arrange a roller frame on the balance beam, thereby increasing the number of wheels, increasing the load-bearing capacity, reducing the pressure on a single wheel, and improving the overall rigidity, and can be applied to a variety of working conditions including inverted triangle cross-section crane arms. The use of the multi-stage balance beam trolley travel mechanism well solves the problems of low load-bearing, excessive wheel pressure, narrow use surface, poor adaptability and versatility of traditional mechanisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an axonometric diagram of a conventional load-carrying trolley travel mechanism provided according to an embodiment of the utility model;

[0023] Figure 2 It is a three-view diagram of a conventional load-carrying trolley travel mechanism provided according to an embodiment of the utility model;

[0024] Figure 3 It is a partial schematic diagram of the wheels of a conventional load-carrying trolley travel mechanism provided according to an embodiment of the utility model;

[0025] Figure 1-Figure 3 Middle: 1. Primary balance beam; 2. Secondary balance beam; 3. Wheel axle; 4. Wheel; 5. Pin; 6. Pin locking nut; 7. Connecting rod; 8. Connecting rod nut;

[0026] Figure 4 It is an axonometric diagram of a multi-stage balance beam trolley travel mechanism provided according to an embodiment of the utility model;

[0027] Figure 5 It is a front view of a multi-stage balance beam trolley travel mechanism provided according to an embodiment of the utility model;

[0028] Figure 6 It is a top view of a multi-stage balance beam trolley travel mechanism provided according to an embodiment of the utility model;

[0029] Figure 7 It is a left view of a multi-stage balance beam trolley travel mechanism provided according to an embodiment of the utility model;

[0030] Figure 8 It is a partial schematic diagram of a wheel of a multi-stage balance beam trolley traveling mechanism provided according to an embodiment of the utility model;

[0031] Figure 4-Figure 8 In: 1. Primary balance beam; 2. Secondary balance beam; 3. Tertiary balance beam; 4. Wheel frame; 5. Wheel; 6. Wheel axle; 7. Wheel axle locking nut; 8. Pin; 9. Pin locking nut; 10. Connecting rod; 11. Connecting rod nut; 12. Tie rod; 13. Partition plate; 14. Closing plate; 15. Pipe sleeve; 16. Oil cup; 17. Bearing. DETAILED DESCRIPTION

[0032] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0033] The terms involved in this utility model are explained as follows:

[0034] Load trolley: Tower crane load trolley is a small vehicle used to transport heavy objects during tower crane construction. During lifting operations, the tower crane fixes the boom in a certain position, and the load trolley travels along the boom to load, unload and transport goods. The load trolley is small in size and can carry a large amount of cargo. It is an indispensable and important part of the tower crane.

[0035] Balance beam: The balance beam is an important component of the load-carrying trolley. It can be used to ensure the balance of various parts of the equipment during lifting operations, reduce the horizontal pressure on the equipment during lifting, avoid damage to the equipment, and through the regulating function of the balance beam, the load in various parts of the mechanism can be reasonably distributed.

[0036] Axonometric drawing reference of traditional load-carrying trolley travel mechanism Figure 1 , three-view reference Figure 2 ,in Figure 2 (a)- Figure 2 (c) are the front view, top view and left view of the conventional trolley travel mechanism; the partial schematic diagram of the wheels of the conventional trolley travel mechanism is shown in FIG. Figure 3 . Figure 1 The middle wheel 4 is connected to the secondary balance beam 2 through the wheel shaft 3, and then the secondary balance beam 2 is connected to the primary balance beam 1 through the pin 5 and the pin locking nut 6. The last balance beam 1 is connected to the frame of the load-carrying trolley through the pin 5 and the pin locking nut 6, and the two rows of wheels 4 are designed symmetrically. A total of 8 wheels are arranged in this structure, which are connected in the middle by connecting rods 7 and connecting rod nuts 8. This structure can only arrange a maximum of 4 wheels on one side.

[0037] The utility model provides a multi-stage balance beam trolley travel mechanism, referring to Figure 4 , Figure 5 A primary balance beam 1, a secondary balance beam 2, a tertiary balance beam 3, a wheel frame 4, and a wheel 5 are respectively arranged on both sides of the body of the load-carrying trolley;

[0038] For one side of the body of the load-carrying trolley, the secondary balance beam 2 and the wheel frame 4 are respectively fixedly connected to the primary balance beam 1 through the pin 8, and the tertiary balance beam 3 is fixedly connected to the secondary balance beam 2 through the pin 8. Figure 6 , Figure 7 The wheels 5 are respectively arranged on the inner side of the three-level balance beam 3 and the wheel frame 4, the wheels 5 on the same side of the body of the load-carrying trolley are collinear, and the wheels 5 are respectively connected to the three-level balance beam 3 and the wheel frame 4 through the wheel axle 6; the wheels 5 on both sides of the body of the load-carrying trolley are symmetrically positioned.

[0039] The secondary balance beam 2 is a single-layer plate in an inverted triangle shape, the upper corner of which is connected to the third-level balance beam 3 and the lower corner is connected to the primary balance beam 1 .

[0040] The two upper corners of the secondary balance beam 2 are respectively connected to the two tertiary balance beams 3 .

[0041] The three-level balance beam 3 is a double-layer plate in an inverted triangle shape with a preset interval. The upper corner of the secondary balance beam 2 is located in the double-layer plate interval at the lower corner of the three-level balance beam 3, fixedly connected by a pin 8, and its top end is fastened by a pin locking nut 9; a tie rod 12 is fixedly arranged in the interval of the double-layer plate of the three-level balance beam 3, and the two upper corners of the three-level balance beam 3 are respectively axially connected to two wheels 5.

[0042] The primary balance beam 1 is a double-layer plate in an inverted triangle shape with a preset interval. The lower corner of the secondary balance beam 2 is located in the double-layer plate interval at the upper corner of the primary balance beam 1, fixedly connected by a pin 8, and its top is fastened by a pin locking nut 7; the lower corner of the primary balance beam 1 is fixedly connected to the body of the load-carrying trolley by the pin 8; the pipe sleeve 15 is sleeved on the outer side of the pin 8 at the lower corner of the primary balance beam 1 to protect the pin 8, and a closed sealing plate 14 is welded in the interval of the double-layer plate of the primary balance beam 1. The primary balance beam 1 is made of high-strength steel plate.

[0043] The wheel frame 4 is a single-layer plate in an inverted triangle shape, the lower corner of which is located in the double-layer plate interval of the primary balance beam 1 and is fixedly connected by a pin 8, and the two upper corners are respectively connected to two wheels 5.

[0044] Each of the three-level balance beams 3 and the wheel frame 4 has two wheels 5 inside, and a partition plate 13 is fixedly arranged between the two wheels 5 .

[0045] Reference Figure 8 Each wheel 5 is connected to the three-level balance beam 3 and the wheel frame 4 respectively through the wheel axle 6 and the matching bearing 17. The wheel axle 6 has an external thread. The inner wall of the wheel axle locking nut 7 has an internal thread matching the external thread of the wheel axle 6 and is fastened to the top of the wheel axle 6. The wheel axle 6 is connected to the oil cup 16 for supplying oil to the wheel axle 6 for lubrication.

[0046] The secondary balance beam 2 and the wheel frame 4 on both sides of the body of the load-carrying trolley are fixedly connected by a connecting rod 10, the top of which has an external thread. The inner wall of the connecting rod nut 11 has an internal thread that matches the external thread of the connecting rod 10 and is fastened to the top of the connecting rod 10.

[0047] The utility model designs a multi-stage balance beam trolley traveling mechanism which adds a first-stage balance beam on the basis of a traditional two-stage balance beam traveling mechanism. The existing trolley traveling mechanism connects the wheel with the second-stage balance beam, and then the second-stage balance beam is connected with the first-stage balance beam, and finally the first-stage balance beam is connected with the frame. An additional stage of balance beam is arranged between the existing first-stage balance beam and the frame, and a roller frame is arranged on the newly arranged balance beam, so that one more set of wheels can be arranged.

[0048] The newly arranged first-level balance beam uses high-strength steel plates on both sides and has internally welded closed plates, which improves its own rigidity and ensures that the center of gravity of the first-level balance beam itself and the overall center of gravity of the traveling mechanism are on the same central axis, ensuring the stability and high rigidity of the traveling mechanism.

[0049] By arranging more primary balance beams and roller frames and ensuring the consistency of the center of gravity of the overall structure, not only the number of wheel arrangements can be increased, but also the rigidity and stability of the overall mechanism can be increased, greatly improving the mechanical performance, universality and versatility of the walking mechanism. In addition, this mechanism also has design adjustability. According to different usage requirements, more wheels can be arranged by changing the length and other dimensions of the primary balance beam, which has great flexibility.

[0050] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A multi-stage balance beam trolley travel mechanism, characterized in that: A primary balance beam (1), a secondary balance beam (2), a tertiary balance beam (3), a wheel frame (4), and a wheel (5) are respectively arranged on both sides of the body of the load-carrying trolley; For one side of the body of the load-carrying trolley, the secondary balance beam (2) and the wheel frame (4) are respectively fixedly connected to the primary balance beam (1) via a pin shaft (8), the tertiary balance beam (3) is fixedly connected to the secondary balance beam (2) via a pin shaft (8), the wheels (5) are respectively arranged on the inner side of the tertiary balance beam (3) and the wheel frame (4), the wheels (5) located on the same side of the body of the load-carrying trolley are collinear, and the wheels (5) are respectively connected to the tertiary balance beam (3) and the wheel frame (4) via a wheel axle (6); the wheels (5) on both sides of the body of the load-carrying trolley are symmetrically positioned.

2. A multi-stage balance beam trolley travel mechanism according to claim 1, characterized in that: The secondary balance beam (2) is a single-layer plate in an inverted triangle shape, the upper corner of which is connected to the third-level balance beam (3), and the lower corner of which is connected to the primary balance beam (1).

3. A multi-stage balance beam trolley travel mechanism according to claim 2, characterized in that: The two upper corners of the secondary balance beam (2) are respectively connected to the two tertiary balance beams (3).

4. The multi-stage balance beam trolley travel mechanism according to claim 2, characterized in that: The three-stage balance beam (3) is a double-layer plate in an inverted triangle shape with a preset interval. The upper corner of the secondary balance beam (2) is located in the double-layer plate interval at the lower corner of the three-stage balance beam (3), fixedly connected by a pin shaft (8), and its top end is fastened by a pin shaft locking nut (9); a tie rod (12) is fixedly arranged in the interval of the double-layer plate of the three-stage balance beam (3), and the two upper corners of the three-stage balance beam (3) are respectively axially connected to two wheels (5).

5. The multi-stage balance beam trolley travel mechanism according to claim 2, characterized in that: The first-level balance beam (1) is a double-layer plate in an inverted triangle shape with a preset interval. The lower corner of the second-level balance beam (2) is located in the interval of the double-layer plate at the upper corner of the first-level balance beam (1) and is fixedly connected by a pin shaft (8). The top end is fastened by a pin shaft locking nut (9). The lower corner of the first-level balance beam (1) is fixedly connected to the body of the load-carrying trolley by the pin shaft (8). The pipe sleeve (15) is sleeved on the outside of the pin shaft (8) at the lower corner of the first-level balance beam (1) to protect the pin shaft (8). A closed sealing plate (14) is welded inside the interval of the double-layer plate of the first-level balance beam (1).

6. The multi-stage balance beam trolley travel mechanism according to claim 1, characterized in that: The primary balance beam (1) is made of high-strength steel plate.

7. The multi-stage balance beam trolley travel mechanism according to claim 2, characterized in that: The wheel frame (4) is a single-layer plate in an inverted triangle shape, the lower corner of which is located in the double-layer plate interval of the primary balance beam (1) and is fixedly connected via a pin (8), and the two upper corners are respectively axially connected to the two wheels (5).

8. The multi-stage balance beam trolley travel mechanism according to claim 1, characterized in that: Each of the three-level balance beams (3) and the wheel frame (4) has two wheels (5) inside, and a partition plate (13) is fixedly arranged between the two wheels (5).

9. The multi-stage balance beam trolley travel mechanism according to claim 1, characterized in that: Each wheel (5) is connected to the three-level balance beam (3) and the wheel frame (4) respectively through a wheel shaft (6) and a matching bearing (17); the wheel shaft (6) has an external thread; the inner wall of the wheel shaft locking nut (7) has an internal thread matching the external thread of the wheel shaft (6) and is fastened to the top of the wheel shaft (6); the wheel shaft (6) is connected to an oil cup (16) for supplying oil to the wheel shaft (6) for lubrication.

10. The multi-stage balance beam trolley travel mechanism according to claim 1, characterized in that: The secondary balance beam (2) and the wheel frame (4) on both sides of the body of the load-carrying trolley are fixedly connected via a connecting rod (10), the top end of which has an external thread, and the inner wall of the connecting rod nut (11) has an internal thread matching the external thread of the connecting rod (10) and is fastened to the top end of the connecting rod (10).

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