CN204643656U - Support roller device and hoisting crane - Google Patents

Abstract

The utility model relates to a kind of support roller device and hoisting crane, wherein, support roller device comprises running roller, running roller bracket and bearing, and running roller bracket is provided with holder axle, the outer ring sleeve of bearing is contained in the two ends of running roller and fixes with running roller, and the inner ring of bearing is sleeved on holder axle and fixes with holder axle.This support roller device passes through at running roller two ends bearing set and utilizes the holder axle sleeve that bracket is arranged to be contained in bearing, make bearing effectively can avoid running roller and the direct wearing and tearing of holding in the palm axle, improve the life-span of support roller device, and the mode of this suit reduces running roller and running roller bracket gap, avoid running roller to come off when high speed rotating, improve the reliability of support roller device.Further, running roller is preferably nylon running roller, and in luffing assembly pulley installation process, nylon running roller can delivery variable-amplitude steel wire rope well, realizes the smooth dismounting of luffing lifting mechanism.

Description

Roller device and crane

technical field

The utility model relates to the field of construction machinery, in particular to a roller device and a crane.

Background technique

In recent years, with the continuous expansion of the scale of construction projects, the amount of lifting and installation projects has increased, especially the installation of modern large-scale petroleum, chemical, smelting, wind power and high-rise buildings has increased year by year. Therefore, for cranes, especially large cranes demand is increasing. The large-tonnage all-terrain crane has a luffing jib working condition, which can not only increase the lifting height, but also increase the range to realize hoisting in complex working conditions.

The hoisting mechanism of the luffing jib is the key component to realize the safe and fast operation of the luffing jib. It realizes the luffing and lifting of the luffing jib through its luffing wire rope. The quality of its work directly affects the whole machine of the crane. performance. Due to the particularity of the luffing jib, it is often necessary to disassemble the luffing jib, the luffing pulley block and other components during field work. The luffing pulley block needs to be pulled out or pulled back from the luffing hoisting mechanism by the luffing wire rope of the main coil or the auxiliary coil until the disassembly and assembly are completed. during this process. In order to prevent the luffing wire rope and the fixed pulley block from wearing and better guide the luffing wire rope, the idler device is particularly important.

The idler roller is widely used in the crane to guide the luffing wire rope to prevent interference with other parts. It has the characteristics of low friction coefficient, wear resistance, and not easy to wear the luffing wire rope. It is one of the important parts when the crane is working. The idler device for cranes is generally arranged at the position where the luffing wire rope needs to be guided, and is usually fixed directly on the winch support or fixed by setting the idler support. The method of directly fixing on the winch bracket has a simple structure, and is generally only used for hoisting to release or retract the luffing steel wire rope, and cannot satisfy the placement of idler rollers at any position.

For the luffing pulley block, due to its own special structure, it cannot be directly fixed on the winch bracket, but can only be fixed by the idler bracket. The shaft will be damaged due to friction, and the rollers will easily fall off during the rotation process, and the service life and working reliability cannot be guaranteed. Require.

Utility model content

In order to overcome the above technical defects, the technical problem solved by the utility model is to provide an idler device, which can effectively reduce the wear of the rollers and prevent the rollers from falling off, and improve the service life and work reliability.

In order to solve the above technical problems, the utility model provides a roller idler device, which includes a roller, a roller bracket and a bearing, the roller bracket is provided with a supporting shaft, and the outer ring of the bearing is set on the roller. Both ends are fixed with the roller, and the inner ring of the bearing is set on the support shaft and fixed with the support shaft.

Further, the roller bracket is provided with a non-circular hole, the support shaft has a connection structure matched with the non-circular hole, and the support shaft is detachably fixed on the roller bracket through the connection structure and the non-circular hole.

Further, the non-round hole is a square hole, and the connection structure is a cuboid matched with the square hole.

Further, the roller is a nylon roller.

Further, the roller bracket includes a left curved plate and a right curved plate, and the distance between the tops of the left curved plate and the right curved plate is greater than the distance between the bottoms.

Further, the roller bracket also includes a rib plate, and the rib plate is vertically arranged on the inner side of the left curved plate and the right curved plate along the direction from the top to the bottom of the left curved plate and the right curved plate.

Further, the width of the top of the left curved plate and the right curved plate is larger than the diameter of the roller.

Further, the bottoms of the left curved plate and the right curved plate are provided with oblong holes for fixing and adjusting the roller brackets.

The utility model also provides a crane, which has the above-mentioned idler roller device.

Further, the crane includes a luffing lifting mechanism, and the luffing lifting mechanism is provided with a luffing fixed pulley block and a luffing fixed pulley block support, the idler device is fixed on the luffing fixed pulley block support, and the roller is located between the luffing fixed pulley block support , and the length of the roller is greater than the width of the luffing block bracket.

Therefore, based on the above-mentioned technical solution, the utility model provides a roller idler device, which can effectively prevent the bearing from The direct wear of the roller and the support shaft improves the service life of the roller device, and this way of fitting reduces the gap between the roller and the roller bracket, avoids the fall of the roller when it rotates at high speed, and also avoids deformation. The amplitude steel wire rope is stuck in the gap and cannot guide the luffing steel wire rope, which improves the reliability of the idler device. Further, the rollers are preferably nylon rollers. During the installation process of the luffing pulley block, the nylon rollers can well guide the luffing steel wire rope and realize the smooth disassembly and assembly of the luffing lifting mechanism. The crane provided by the utility model also correspondingly has the above-mentioned beneficial technical effects.

Description of drawings

The drawings described here are used to provide a further understanding of the utility model and constitute a part of the application. The schematic embodiments of the utility model and their descriptions are only used to explain the utility model and do not constitute an improper limitation of the utility model . In the attached picture:

Fig. 1 is a schematic structural view of an embodiment of the utility model idler device;

Fig. 2 is the structural representation of the roller bracket of the utility model roller device;

Fig. 3 is a structural schematic diagram of the luffing mechanism of the crane of the present invention.

Detailed ways

The technical solutions of the present utility model will be further described in detail through the drawings and embodiments below. The specific implementation of the utility model is to facilitate further description of the concept of the utility model, the technical problems to be solved, the technical features constituting the technical solution and the technical effects brought about. It should be noted that the description of these embodiments does not constitute a limitation of the present utility model. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

In describing the present invention, it should be understood that the terms "central", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal" , "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating Or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the protection scope of the present utility model.

Considering the special structure of the luffing pulley block itself, the roller can only be fixed by the idler bracket. However, due to the high speed of the roller during the luffing wire rope transmission process, the roller rubs against the shaft supported by it and damages it. The roller is also prone to fall off during the rotation process, and the service life and working reliability cannot be guaranteed. Therefore, the utility model designs a roller device. The roller device is equipped with bearings at both ends of the roller and uses a bracket The support shaft set on the upper part is set in the bearing, so that the bearing can effectively avoid the direct wear of the roller and the support shaft, and improve the service life of the roller device, and this way of setting reduces the gap between the roller and the roller bracket. It avoids the falling off of the rollers when rotating at high speed, and improves the reliability of the idler device.

In a schematic embodiment, as shown in Figure 1, the idler device includes a roller 1, a roller bracket 2 and a bearing 3, the roller bracket 2 is provided with a supporting shaft 4, and the outer ring of the bearing 3 is set on Both ends of the roller 1 are fixed with the roller 1, and the inner ring of the bearing 3 is sleeved on the support shaft 4 and fixed with the support shaft 4.

In this exemplary embodiment, the outer ring of the bearing 3 is fitted and fixed on both ends of the roller 1, the inner ring of the bearing 3 is fitted and fixed on the support shaft 4 provided on the roller bracket 2, and the roller 1 When rotating at high speed, the bearing 3 can effectively avoid the wear caused by the direct contact between the roller 1 and the supporting shaft 4, which greatly reduces the wear compared with the existing way of directly installing the roller and its supporting shaft, making the use of the supporting roller device The service life is significantly improved, and the set of the roller 1 and the bearing 3, and the set of the bearing 3 and the supporting shaft 4 can well reduce the installation gap between the roller bracket 2 and the roller 1, and avoid the roller 1 in the Falling off during high-speed rotation also prevents the luffing steel wire rope from being stuck in the gap and cannot guide the luffing steel wire rope, which improves the reliability of the idler device, and this connection method is also easy to disassemble to replace the roller 1, which is practical better. Wherein, the support shaft 4 can be directly welded on the roller bracket 2, and can also be detachably arranged on the roller bracket 2, as shown in Figures 1 and 2, in a preferred exemplary embodiment, the roller The wheel bracket 2 is provided with a non-circular hole 23, and the supporting shaft 4 has a connection structure that cooperates with the non-circular hole 23. The supporting shaft 4 is detachably fixed on the roller bracket 2 through the connection structure and the non-circular hole 23. The cooperative installation of the structure and the non-round hole 23 can prevent the support shaft 4 from rotating relative to the roller bracket 2, and the connection structure of the support shaft 4 can be easily disassembled from the non-circular hole 23 of the roller bracket 2, so that The supporting shafts 4 at both ends of the roller 1 are interchangeable and easy to install. The non-circular hole 23 can be a hexagonal hole or a triangular hole, and the corresponding connecting structure is a structure matched with the hexagonal hole and the triangular hole. Preferably, the non-circular hole 23 is a square hole. At this time, the connection structure is a cuboid matching the square hole. The square hole and the cuboid are easy to process and have a simple structure, which is convenient for installation and use.

As a preference for the above preferred exemplary embodiment, the roller 1 is preferably a nylon roller. Nylon rollers have the advantages of low friction coefficient, wear resistance, and not easy to damage the belt. They have excellent self-lubricating properties. During the installation process of the luffing pulley block, the nylon rollers can well guide the luffing steel wire rope and quickly realize luffing lifting The smooth disassembly and assembly of the mechanism. Moreover, the nylon roller can operate under harsh environmental conditions without oil injection, is not easy to get stuck, and can withstand repeated shocks and vibrations. The nylon roller itself is light in weight, only one-third of the metal parts, easy to install, low in maintenance rate, low in noise, stable in operation, energy-saving, and can increase the service life. The nylon roller further improves the service life of the roller device.

Specifically, in a preferred or optional exemplary embodiment, as shown in FIG. 1 and FIG. 2 , the roller bracket 2 includes a left curved plate 21 and a right curved plate 22, and the left curved plate 21 and the right curved plate 22 The main frame structure as the roller bracket 2 is arranged at both ends of the roller 1, and the left curved plate 21 and the right curved plate 22 are preferably processed by hot-rolled thick steel plates. Since the luffing steel wire rope has a certain space width requirement in the process of hoisting and receiving the rope by the luffing winch, the roller 1 must meet the minimum length requirement to ensure that the luffing steel wire rope can freely travel within the length range of the roller 1. Inner guide, so the length of the roller 1 is greater than the width of the luffing pulley bracket fixing the idler bracket 2, that is, the distance between the top of the left curved plate 21 and the right curved plate 22 is greater than the distance between the bottom, thus forming The structural characteristics of the roller bracket 2 "wide at the top and narrow at the bottom" are realized. Preferably, as shown in Figures 1 and 2, the idler device also includes bolts 5, nuts 6, upper gaskets 7 and lower gaskets 8, and the bottoms of the left curved plate 21 and the right curved plate 22 are provided for fixing and adjusting the rollers. The oblong hole 25 of the wheel bracket 2, the bolt 5 passes through the upper gasket 7, the oblong hole 25 and the lower gasket 8 and is threaded with the nut 6 to fix the left curved plate 21 and the right curved plate 22. The oblong hole 26 can facilitate Adjust the installation position of the roller bracket 2 to meet the installation needs and improve the applicability of the roller device. Setting the upper gasket 7 and the lower gasket 8 on the inner and outer sides of the bottom of the left curved plate 21 and the right curved plate 22 can ensure that the roller The installation stability of the wheel bracket 2 avoids falling off due to vibration in the working process, and further improves the working stability of the idler device.

In order to prevent the luffing wire rope from falling off the roller 1, in a preferred exemplary embodiment, as shown in Figure 1, the width of the top of the left curved plate 21 and the right curved plate 22 is greater than the diameter of the roller 1, and the left curved plate 21 and the The part of the top of the right curved plate 22 that is wider than the roller 1 can be used as a protective structure to prevent the luffing wire rope from falling off the roller 1, thereby improving the working reliability of the idler bracket.

In order to further strengthen the mechanical strength of the roller bracket 2, as shown in FIGS. The bottom direction is vertically set on the inside of the left curved plate 21 and the right curved plate 22 . The rib plate 24 can effectively ensure the structural strength of the roller bracket 2 and greatly improve the stability and reliability of the idler device during work.

The utility model also provides a crane. As shown in FIG. 3 , the crane has the above-mentioned roller device 104 . Because the idler device of the utility model can effectively reduce the wear of the rollers and prevent the rollers from falling off, and improve the service life and work reliability, correspondingly, the crane of the utility model also has the above-mentioned beneficial technical effects, which will not be repeated here.

In a specific or preferred exemplary embodiment of the utility model crane, as shown in FIG. , luffing fixed pulley bracket 102 and luffing winch 105, the idler device 104 is fixed on the luffing fixed pulley bracket 102, the roller 1 is located on the luffing fixed pulley bracket 102, and the length of the roller 1 is greater than the luffing Determine the width of the block pulley bracket 102. The roller 1 is located above the luffing fixed pulley block 103 and can smoothly guide the luffing steel wire rope, preventing it from interfering with mechanisms such as the luffing fixed pulley block 103 . When the luffing movable pulley block 101 is disassembled, the luffing steel wire rope is retracted or released from the luffing winch 105, and the luffing steel wire rope is guided to the luffing movable pulley block 101 through the idler device 104, and finally forms a pulley block system with the luffing fixed pulley block 103 , and then realize the luffing and lifting of the luffing jib. The idler device 104 makes full use of its own mechanism characteristics and has a reasonable layout, which can effectively reduce the wear of the rollers and prevent the rollers from falling off, so as to achieve the purpose of durable and reliable guiding of the luffing steel wire rope.

The above combined embodiments are described in detail for the implementation of the utility model, but the utility model is not limited to the described implementation. For example, the roller 1 can also be made of other conventional materials such as steel. For those skilled in the art, without departing from the principle and spirit of the utility model, various changes, modifications, equivalent replacements and modifications to these embodiments still fall within the protection scope of the utility model Inside.

Claims (10)

1. a roller device, is characterized in that, comprises roller (1), roller bracket (2) and bearing (3), and described roller bracket (2) is provided with supporting shaft (4), so The outer ring of the bearing (3) is fitted on both ends of the roller (1) and fixed with the roller (1), the inner ring of the bearing (3) is fitted on the support shaft (4) and It is fixed with the supporting shaft (4). 2. The idler device according to claim 1, characterized in that, the roller bracket (2) is provided with a non-circular hole (23), and the supporting shaft (4) has a shape corresponding to the non-circular hole ( 23) A matching connection structure, the support shaft (4) is detachably fixed on the roller bracket (2) through the connection structure and the non-circular hole (23). 3. The idler device according to claim 2, characterized in that, the non-round hole (23) is a square hole, and the connection structure is a cuboid matching the square hole. 4. The idler device according to claim 1, characterized in that, the roller (1) is a nylon roller. 5. The idler device according to any one of claims 1-4, characterized in that, the roller bracket (2) includes a left curved plate (21) and a right curved plate (22), and the left curved plate The distance between the plate (21) and the top of said right curved plate (22) is greater than the distance between the bottom. 6. The idler device according to claim 5, characterized in that, the roller bracket (2) further comprises a rib plate (24), and the rib plate (24) is along the left curved plate (21) and the right curved plate (22) are vertically arranged on the inside of the left curved plate (21) and the right curved plate (22) from top to bottom. 7. The idler device according to claim 5, characterized in that, the width of the tops of the left curved plate (21) and the right curved plate (22) is larger than the diameter of the roller (1). 8. The idler device according to claim 5, characterized in that, the bottoms of the left curved plate (21) and the right curved plate (22) are provided with brackets (2) for fixing and adjusting the rollers oblong holes (25). 9. A crane, characterized in that it has the idler device (104) according to any one of claims 1-8. 10. The crane according to claim 9, characterized in that it comprises a luffing hoisting mechanism (100), and the luffing hoisting mechanism (100) is provided with a luffing fixed pulley block (103) and a luffing fixed pulley block bracket (102), the roller device (104) is fixed on the luffing fixed pulley bracket (102), the roller (1) is located on the luffing fixed pulley bracket (102), and the The length of the roller (1) is greater than the width of the luffing block bracket (102).