Insulation boom truck small crane slewing mechanism with slewing bearing

Abstract

The utility model discloses a swing mechanism with a swing bearing for a small crane of an insulated boom truck. The swing mechanism comprises a movable end component, a fixed end component, a supporting seat, a pin shaft for fixing, the swing bearing, a power source, a small gear ring and a balance valve, wherein the supporting seat and the pin shaft for fixing are arranged at a fixed end; the swing bearing is arranged on the supporting seat, and the power source and the small gear ring are arranged at a movable end; and the slewing bearing is meshed with the small gear ring for power transmission. The slewing bearing and the small gear ring are in meshing transmission, the transmission form is simple, the size and the weight are small, and the fault occurrence possibility is low; the fixed end component and the movable end component are respectively and tightly installed on the slewing bearing, when a small crane is suspended, the slewing bearing can effectively counteract radial force generated when the movable end component bears unbalance loading force, the phenomenon of oil leakage caused by the fact that the radial force is transmitted to a power source shaft head is avoided, and the reliability of the structure can be better improved.

Description

Technical Field

[0001] This utility model relates to the field of insulated bucket truck boom slewing mechanism, and more particularly to an insulated bucket truck small crane slewing mechanism with a slewing bearing. Background Technology

[0002] Currently, most insulated bucket truck boom slewing systems use either an integrated slewing reducer structure or a large and small gear ring meshing structure. Firstly, the integrated slewing reducer structure suffers from large size and weight, and the limited space in the middle makes it prone to wear when passing through pipelines. Secondly, when lifting small loads, the load on the fixed end components is eccentric, leading to structural deformation. The large and small gear ring meshing structure easily generates radial forces, which are transmitted to the power source. In this structure, the relatively softer seals can deform due to the radial forces, causing oil leakage from the power source.

[0003] Therefore, it is necessary to develop a new type of insulated bucket truck small crane slewing mechanism to achieve the goal of lightweighting and improve product reliability. Utility Model Content

[0004] Purpose of the utility model: To address the shortcomings and defects of the existing technology, this utility model provides a slewing mechanism for an insulated bucket truck with a slewing bearing. It adopts a slewing bearing and a small gear ring meshing transmission, which is simple in transmission form, small in size and weight, and has a low probability of failure. The fixed end component and the movable end component are respectively tightly installed on the slewing bearing. When the small crane is lifting, the slewing bearing can effectively offset the radial force generated by the eccentric load on the movable end component, avoiding the radial force from being transmitted to the power source shaft and causing oil leakage, thus improving the reliability of the structure.

[0005] Technical solution: The present invention relates to a slewing mechanism for an insulated bucket truck with a slewing bearing, characterized in that it includes a movable end component, a fixed end component, a support base and a fixing pin mounted on the fixed end, a slewing bearing mounted on the support base, a power source and a small gear ring mounted on the movable end, and a balance valve for locking; the slewing bearing meshes with the small gear ring to transmit power.

[0006] The slewing bearing is fixed to the support base by the outer ring.

[0007] The support base is fixed to the fixed end component by a pin.

[0008] The movable end component has a welded flange at its bottom fixed to the inner ring of the slewing bearing.

[0009] The power source drives the small gear ring to rotate, which in turn drives the movable end component to rotate.

[0010] The movable end component and the fixed end component are fixed by the slewing bearing.

[0011] The movable end component, fixed end component, and slewing bearing are located on the slewing mechanism of the insulated bucket truck's small crane.

[0012] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: The present invention adopts a slewing bearing and a small gear ring meshing transmission, which is simple in transmission form, small in size and weight, and has a low probability of failure; the fixed end component and the movable end component are respectively tightly installed on the slewing bearing. When the small crane is lifting, the slewing bearing can effectively offset the radial force generated by the eccentric load on the movable end component, avoid the radial force being transmitted to the power source shaft head and causing oil leakage, and can better improve the reliability of the structure. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the right-side structure of this utility model;

[0016] In the figure, 1 is the movable end component; 2 is the fixed end component; 3 is the support base; 4 is the slewing bearing; 5 is the small gear ring; 6 is the power source; 7 is the balance valve; and 8 is the pin. Detailed Implementation

[0017] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] The present invention relates to an insulated bucket truck small crane slewing mechanism with a slewing bearing, comprising a movable end component 1, a fixed end component 2, a support base 3 and a fixing pin 8 mounted on the fixed end, a slewing bearing 4 mounted on the support base 3, a power source 6 and a small gear ring 5 mounted on the movable end, and a balance valve 7 for locking; the slewing bearing 4 meshes with the small gear ring 5 to transmit power.

[0019] The slewing bearing 4 of this invention is fixed to the support base 3 via its outer ring. The support base 3 is fixed to the fixed end component 2 via a pin 8. The bottom flange of the movable end component 1 is welded and fixed to the inner ring of the slewing bearing 4. The power source 6 drives the small gear ring 5 to rotate, thereby causing the movable end component 1 to rotate. The movable end component 1 and the fixed end component 2 are fixed by the slewing bearing 4. The movable end component 1, the fixed end component 2, and the slewing bearing 4 are located on the slewing mechanism of the insulated bucket truck's small crane.

[0020] like Figure 1 , Figure 2 , Figure 3The slewing mechanism of the insulated bucket truck with slewing bearing of this utility model includes: a movable end component 1, which can be redesigned according to the installation requirements of the components to be slewing; the structure shown in the figure is for illustrative purposes only; a fixed end component 2; a support base 3, used to fix the slewing bearing on the fixed end component; a slewing bearing 4, used to realize the relative movement between the fixed end component and the movable end component; a small gear ring 5, used to transmit power; a power source 6, which can be a slewing motor or a hydraulic motor, used to generate power; a balance valve 7, used to lock the slewing mechanism; and a pin 8, used to fix the support base on the fixed end component.

[0021] When the power source outputs power, it drives the small gear ring to rotate. The small gear ring meshes with the slewing bearing, thereby driving the movable end component to rotate. When the movable end component is under load, it will generate a large eccentric load. This eccentric load is transmitted to the slewing bearing. Due to its structural characteristics, the slewing bearing will not experience significant structural deformation, and the center distance between it and the small gear ring will not change. Therefore, it will not generate radial force on the power source, effectively protecting the power source's sealing structure, preventing oil leakage during rotation, and improving structural reliability.

[0022] The start-stop process of the power source rotation is locked by a balance valve. The power source does not need to have its own rotation function. The locking process of the balance valve is independent of the required flow rate. Therefore, problems such as abnormal noise or uneven rotation caused by the power source's own locking function failing to open due to low rotation flow will not occur. The reduction ratio can be adjusted by adjusting the number of teeth on the slewing bearing and the pinion gear to meet different speed and force transmission requirements.

[0023] This utility model uses a slewing bearing to fix the movable end and the fixed end components, which can be firmly fixed. When the movable end component is subjected to radial force, the inner and outer rings of the slewing bearing will not produce obvious stress deformation, and the ability to withstand radial force is better.

[0024] This invention does not require a lock-up power source, allowing for the selection of a lower-cost power source. Combined with the balance valve, the overall cost is even lower. Furthermore, for a power source without lock-up, the flow rate requirement is lower, making it easier to control.

[0025] The tooth ratio between the slewing bearing and the small gear ring of this utility model is used to adjust the reduction ratio of the slewing mechanism. The power source can be an electric motor or a hydraulic motor, and it may not have a locking function. The small gear ring is fixed to the power source by a keyway and bolts. The movable end component can be any component that needs to be installed on it to meet the rotation conditions.

[0026] This utility model features a simple and rationally designed slewing mechanism that is easy to install. The slewing bearing almost completely eliminates the radial force generated by eccentric loads on the structure. For compact structures subjected to large eccentric loads, it offers better economic benefits and higher reliability. This utility model employs a slewing bearing and a small gear ring meshing transmission, resulting in a simple transmission method, small size and weight, and a low probability of failure. The fixed-end and movable-end components are tightly mounted on the slewing bearing. When a small load is lifted, the slewing bearing effectively counteracts the radial force generated by the eccentric load on the movable-end component, preventing the radial force from being transmitted to the power source shaft and causing oil leakage, thus further improving the reliability of the structure.

Claims

1. An insulated boom truck with a slewing bearing, characterized by: The application relates to a rotary mechanism for a small crane of an insulated boom truck, which comprises a movable end component (1), a fixed end component (2), a supporting seat (3) fixed to the fixed end and a fixing pin shaft (8), a rotary bearing (4) fixed to the supporting seat (3), a power source (6) and a pinion (5) fixed to the movable end, and a balance valve (7) for locking.

2. The slewing bearing-equipped insulated boom truck small crane slewing mechanism according to claim 1, characterized by: The rotary bearing (4) is fixed to the supporting seat (3) through an outer ring.

3. The slewing bearing-equipped insulated boom truck small crane slewing mechanism according to claim 1, characterized by: The supporting seat (3) is fixed to the fixed end component (2) through the pin shaft (8).

4. The slewing bearing-equipped insulated boom truck small crane slewing mechanism according to claim 1, characterized by: The bottom of the movable end component (1) is welded with a flange plate and fixed to an inner ring of the rotary bearing (4).

5. The slewing bearing-equipped insulated boom truck small crane slewing mechanism according to claim 1, characterized by: The power source (6) drives the pinion (5) to rotate and drives the movable end component (1) to rotate.

6. The slewing bearing-equipped insulated boom truck mini-crane slewing mechanism according to claim 1, characterized by: The movable end component (1) and the fixed end component (2) are fixed through the rotary bearing (4).

7. The slewing bearing-equipped insulated boom truck small crane slewing mechanism according to claim 1, characterized by: The movable end component (1), the fixed end component (2) and the rotary bearing (4) are located on the small crane rotary mechanism of the insulated boom truck.

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