Modularized assembly structure of truck-mounted crane slewing mechanism

Abstract

The utility model discloses a modular assembly structure of a truck-mounted crane slewing mechanism, and relates to the technical field of slewing mechanisms. The slewing bearing comprises a base, a slewing bearing body is arranged at the top end of the base and comprises an outer ring and an inner ring, the inner ring is located in the outer ring, a plurality of first mounting holes which are annularly and evenly distributed are formed in the top end of the inner ring and the top end of the outer ring, and a suspension arm mounting base is arranged at the top end of the slewing bearing body. First fixing plates are fixedly mounted on the left side and the right side of the lifting arm mounting seat, L-shaped plates are fixedly mounted on the sides, away from the lifting arm mounting seat, of the first fixing plates, inserting rods slidably penetrate through the middles of the L-shaped plates, and two second fixing plates which are symmetrically distributed are fixedly mounted on the upper surface of the base; according to the utility model, the mounting efficiency of the suspension arm mounting seat and the slewing bearing is improved, and the hole in the suspension arm mounting seat is not required to correspond to the first mounting hole in the outer ring through manual repeated adjustment after the suspension arm mounting seat is attached to the slewing bearing.

Description

Technical Field

[0001] This utility model relates to the field of slewing mechanism technology, specifically a modular assembly structure for a truck-mounted crane slewing mechanism. Background Technology

[0002] In truck-mounted cranes, the slewing mechanism typically consists of a base, a slewing bearing, and a drive unit. The slewing bearing includes an outer ring and an inner ring. When assembling the crane boom with the slewing bearing, the boom is lifted by other lifting mechanisms and then placed on the slewing bearing. However, after the boom base is fitted with the slewing bearing, the mounting holes on the boom base and the mounting holes on the outer ring of the slewing bearing do not align. This requires manual adjustment of the boom base, which is labor-intensive and time-consuming, as it involves constant adjustments to align the mounting holes on the boom base and the outer ring. This significantly reduces installation efficiency. Utility Model Content

[0003] To address the issue that after attaching the boom base to the slewing bearing, manual adjustment of the boom base is still required to ensure alignment between the boom base and the outer ring, this invention aims to provide a modular assembly structure for the slewing mechanism of a truck-mounted crane.

[0004] To solve the above technical problems, the present invention adopts the following technical solution: a modular assembly structure for a truck-mounted crane slewing mechanism, including a base, a slewing bearing at the top of the base, the slewing bearing including an outer ring and an inner ring, the inner ring being located inside the outer ring, the top of the inner ring and the outer ring each having a plurality of annularly evenly distributed first mounting holes, the top of the slewing bearing having a boom mounting seat, the left and right sides of the boom mounting seat each having a first fixing plate fixedly mounted, the side of the first fixing plate away from the boom mounting seat having an L-shaped plate fixedly mounted, the middle of the L-shaped plate having a plug rod fixedly mounted, the upper surface of the base having two symmetrically distributed second fixing plates fixedly mounted, the top of the second fixing plates having a sleeve fixedly mounted, the middle of the sleeve having a slot for cooperating with the plug rod.

[0005] Preferably, the top of the base is provided with a circular buffer plate, the outer diameter of which is the same as the outer diameter of the outer ring. The top of the circular buffer plate is provided with a plurality of annularly evenly distributed second mounting holes, which cooperate with the first mounting holes at the top of the inner ring. The bottom of the circular buffer plate is fixedly installed with a plurality of annularly evenly distributed connecting rods. A hollow rod is slidably sleeved on the outside of the connecting rod. The middle part of the hollow rod is a cavity. The hollow rod is fixedly connected to the base. A limiting plate is fixedly installed at the bottom of the connecting rod. The limiting plate is slidably connected inside the hollow rod. A first spring is fixedly installed at the bottom of the limiting plate. The first spring is fixedly connected to the upper surface of the inner wall of the hollow rod.

[0006] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0007] 1. This application improves the installation efficiency of the boom mounting base and the slewing bearing, eliminating the need for repeated manual adjustments to align the holes on the boom mounting base with the first mounting holes on the outer ring after the boom mounting base and the slewing bearing are in contact.

[0008] 2. This application provides a buffering effect when the slewing bearing is installed on the base, preventing damage to components due to excessive impact and extending the service life of the equipment. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 This is a schematic diagram of the disassembled structure of the slewing bearing and base in this utility model.

[0012] Figure 3 This is a schematic diagram of the connection structure between the insert rod and the sleeve in this utility model.

[0013] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle.

[0014] Figure 5 This is a schematic diagram of the connection structure between the base and the circular groove in this utility model.

[0015] Figure 6 This is a schematic diagram of the internal structure of the hollow rod in this utility model.

[0016] In the diagram: 1. Base; 11. Slewing bearing; 12. Outer ring; 13. Inner ring; 14. First mounting hole; 15. Boom mounting seat; 2. First fixing plate; 20. L-shaped plate; 21. Insert rod; 22. Top plate; 23. Second fixing plate; 24. Sleeve; 25. Slot; 3. Circular buffer plate; 31. Second mounting hole; 32. Connecting rod; 33. Hollow rod; 35. First spring; 4. Circular groove; 5. Positioning plate; 51. Connecting plate; 6. Second spring; 61. Disc; 7. Locking block; 71. Locking groove. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example: Figure 1-6 As shown, this utility model provides a modular assembly structure for a truck-mounted crane slewing mechanism, including a base 1. The top of the base 1 is provided with a slewing bearing 11, which includes an outer ring 12 and an inner ring 13. The inner ring 13 is located inside the outer ring 12. The top of both the inner ring 13 and the outer ring 12 are provided with a plurality of annularly distributed first mounting holes 14. The top of the slewing bearing 11 is provided with a boom mounting seat 15. The left and right sides of the boom mounting seat 15 are fixedly installed with first fixing plates 2. The side of the first fixing plate 2 away from the boom mounting seat 15 is fixedly installed with an L-shaped plate 20. The middle of the L-shaped plate 20 is fixedly installed with a plug rod 21. The upper surface of the base 1 is fixedly installed with two symmetrically distributed second fixing plates 23. The top of the second fixing plate 23 is fixedly installed with a sleeve 24. The middle of the sleeve 24 is provided with a slot 25 for use with the plug rod 21.

[0019] The top of the base 1 is provided with a circular buffer plate 3. The outer diameter of the circular buffer plate 3 is the same as the outer diameter of the outer ring 12. The top of the circular buffer plate 3 is provided with several annularly evenly distributed second mounting holes 31. The second mounting holes 31 are used in conjunction with the first mounting holes 14 at the top of the inner ring 13. Several annularly evenly distributed connecting rods 32 are fixedly installed at the bottom of the circular buffer plate 3. Hollow rods 33 are slidably sleeved on the outside of the connecting rods 32. The middle part of the hollow rods 33 is a cavity. The hollow rods 33 are fixedly connected to the base 1. A limiting plate 34 is fixedly installed at the bottom of the connecting rods 32. The limiting plate 34 is slidably connected inside the hollow rods 33. A first spring 35 is fixedly installed at the bottom of the limiting plate 34. The first spring 35 is fixedly connected to the upper surface of the inner wall of the hollow rods 33.

[0020] Two symmetrically distributed positioning plates 5 are fixedly installed on the top of the base 1. Connecting plates 51 that cooperate with the positioning plates 5 are fixedly installed on both the front and rear sides of the outer ring 12. By setting the positioning plates 5, when the inner ring 13 in the slewing bearing 11 is installed with the annular buffer plate 3, the connecting plates 51 on the outer ring 12 are made to fit with the positioning plates 5, so that the first mounting hole 14 on the outer ring 12 and the hole on the boom mounting seat 15 correspond more accurately, further improving the installation efficiency.

[0021] A circular groove 4 is provided on the upper surface of the base 1. The hollow rod 33 and the circular buffer plate 3 are located in the circular groove 4. By setting the circular groove 4, it is easier to know where the slewing bearing 11 needs to be installed on the base 1, thus improving the installation efficiency.

[0022] The diameter of the limiting plate 34 is larger than the diameter of the connecting rod 32, which prevents the connecting rod 32 from causing the circular buffer plate 3 to move out of the circular groove 4 when the connecting rod 32 rebounds, thus affecting the next installation of the slewing bearing 11.

[0023] A second spring 6 is fixedly installed on the lower surface of the L-shaped plate 20. A disc 61 is fixedly installed at the bottom end of the second spring 6. The disc 61 is slidably sleeved on the outside of the insertion rod 21. By setting the second spring 6, when the insertion rod 21 is inserted into the slot 25, the disc 61 fits against the sleeve 24. As the insertion rod 21 continues to move downward, the second spring 6 contracts. This buffers the downward gravity of the boom mounting base 15 when assembling the boom mounting base 15 and the slewing bearing 11, reduces the risk of damage to the slewing bearing 11 due to excessive impact, and extends the service life of the equipment.

[0024] Both sides of the inner wall of the disc 61 are fixedly installed with locking blocks 7, and both sides of the insertion rod 21 are provided with locking grooves 71 that cooperate with the locking blocks 7. By setting the locking blocks 7 and the locking grooves 71, the disc 61 is limited to prevent the disc 61 from detaching from the insertion rod 21 when the disc 61 and the sleeve 24 are not in contact and the insertion rod 21 is not inserted into the slot 25, thus affecting the insertion of the insertion rod 21 into the slot 25 and the installation of the slewing bearing 11.

[0025] Working principle: In actual use, when installing the slewing bearing 11, the inner ring 13 is first placed on the annular buffer plate 3, so that the first mounting hole 14 on the inner ring 13 corresponds to the second mounting hole 31 on the annular buffer plate 3. Then, the inner ring 13 is installed on the annular buffer plate 3 with bolts. When the inner ring 13 is placed on the annular buffer plate 3, the weight of the slewing bearing 11 causes the annular buffer plate 3 to move down. As the annular buffer plate 3 moves down, the connecting rod 32 moves down in the hollow rod 33. The connecting rod 32 causes the limiting plate 34 to move down, and the first spring 35 contracts, thereby buffering the weight of the slewing bearing 11 and protecting the slewing bearing 11, thus avoiding damage to the internal components of the slewing bearing 11.

[0026] When assembling the boom mounting base 15 with the outer ring 12 on the slewing bearing 11, manual assistance is required from the hoisting mechanism to align the insertion rod 21 with the slot 25 and insert the insertion rod 21 into the slot 25. During this process, the disc 61 initially contacts the sleeve 24. As the insertion rod 21 continues to press down, the second spring 6 gradually contracts. When the insertion rod 21 is fully inserted into the slot 25, the boom mounting base 15 and the slewing bearing 11 are perfectly aligned. At the same time, the first mounting hole 14 on the outer ring 12 corresponds to the hole on the boom mounting base 15, thus eliminating the need for repeated manual adjustments after alignment.

[0027] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A modular assembly structure for a truck-mounted crane slewing mechanism, comprising a base (1), characterized in that: The top of the base (1) is provided with a slewing bearing (11), which includes an outer ring (12) and an inner ring (13). The inner ring (13) is located inside the outer ring (12). The top of the inner ring (13) and the outer ring (12) are provided with several annularly distributed first mounting holes (14). The top of the slewing bearing (11) is provided with a boom mounting seat (15). The left and right sides of the boom mounting seat (15) are fixedly installed with first fixing plates (2). The side of the first fixing plate (2) away from the boom mounting seat (15) is fixedly installed with an L-shaped plate (20). The middle part of the L-shaped plate (20) is fixedly installed with a plug rod (21). The upper surface of the base (1) is fixedly installed with two symmetrically distributed second fixing plates (23). The top of the second fixing plate (23) is fixedly installed with a sleeve (24). The middle part of the sleeve (24) is provided with a slot (25) for use with the plug rod (21).

2. The modular assembly structure of the slewing mechanism of a truck-mounted crane as described in claim 1, characterized in that, The base (1) has a circular buffer plate (3) at its top. The outer diameter of the circular buffer plate (3) is the same as the outer diameter of the outer ring (12). The top of the circular buffer plate (3) has several annularly distributed second mounting holes (31). The second mounting holes (31) are used in conjunction with the first mounting holes (14) at the top of the inner ring (13). The bottom of the circular buffer plate (3) is fixedly installed with several annularly distributed connecting rods (32). The outer side of the connecting rods (32) is fitted with hollow rods (33). The middle part of the hollow rods (33) is a cavity. The hollow rods (33) are fixedly connected to the base (1). The bottom of the connecting rods (32) is fixedly installed with a limiting plate (34). The limiting plate (34) is slidably connected inside the hollow rods (33). The bottom of the limiting plate (34) is fixedly installed with a first spring (35). The first spring (35) is fixedly connected to the upper surface of the inner wall of the hollow rods (33).

3. The modular assembly structure of the slewing mechanism of a truck-mounted crane as described in claim 1, characterized in that, The top of the base (1) is fixedly equipped with two symmetrically distributed positioning plates (5), and the front and rear sides of the outer ring (12) are fixedly equipped with connecting plates (51) that cooperate with the positioning plates (5).

4. The modular assembly structure of the slewing mechanism of a truck-mounted crane as described in claim 2, characterized in that, The upper surface of the base (1) is provided with a circular groove (4), and the hollow rod (33) and the circular buffer plate (3) are located in the circular groove (4).

5. The modular assembly structure of the slewing mechanism of a truck-mounted crane as described in claim 2, characterized in that, The diameter of the limiting plate (34) is larger than the diameter of the connecting rod (32).

6. The modular assembly structure of the slewing mechanism of a truck-mounted crane as described in claim 1, characterized in that, A second spring (6) is fixedly installed on the lower surface of the L-shaped plate (20), and a disc (61) is fixedly installed at the bottom end of the second spring (6). The disc (61) is slidably sleeved on the outside of the insert rod (21).

7. The modular assembly structure of the slewing mechanism of a truck-mounted crane as described in claim 6, characterized in that, Both sides of the inner wall of the disc (61) are fixedly installed with a locking block (7), and both sides of the insert rod (21) are provided with a slot (71) that cooperates with the locking block (7).

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