Roller bearing, rope falling prevention device and rotary drilling rig

Abstract

The invention discloses a roller bearing which comprises a shaft, a bearing assembly and a roller. The shaft comprises a main body part as well as a mounting part and a connecting part which are respectively arranged at two ends of the main body part, and the mounting part at each end is connected between the main body part and the connecting part; the number of the bearing assemblies is two, the bearing assemblies are arranged on the mounting parts at the two ends of the main body part respectively, the roller is rotatably arranged on the two bearing assemblies in a sleeving mode, and the connecting parts extend out of the two ends of the roller; an oil cup is arranged on the bearing assembly, and the oil cup is communicated with the bearing assembly so as to inject lubricating grease into the bearing assembly. The invention further discloses a rope falling prevention device and a rotary drilling rig. According to the roller bearing, the anti-rope-falling device and the rotary drilling rig, the anti-rope-falling device can effectively prevent the winding steel wire rope from falling off from the pulley, so that reliable and stable operation of the rotary drilling rig is guaranteed; meanwhile, the oil cup is arranged on the roller bearing, so that the service life of the rope falling prevention device and the winding steel wire rope can be prolonged.

Description

Technical Field

[0001] This invention relates to the field of pile foundation construction equipment technology, and in particular to a roller bearing, an anti-rope slippage device, and a rotary drilling rig. Background Technology

[0002] A rotary drilling rig is a type of machinery used for soil extraction, hole drilling, and pile construction. It is driven by a hydraulic system to power a hydraulic motor, which in turn drives a power head to rotate. The rotating power head drives the drill rod, which in turn drives a rotary drill bucket to rotate and cut the soil and rock. The drill rod and bucket are then lifted out of the hole by a main winch for periodic operation.

[0003] like Figure 1 and Figure 2 As shown, the top of the rotary drilling rig 1 is equipped with a hoisting frame 2, which has two sets of large pulleys and two sets of small pulleys 3. The main winch wire rope is used to lift and lower the drill rod and drill bit via the large pulleys, and the auxiliary winch wire rope 4 is used to carry out hoisting operations on the construction site via the small pulleys 3, in order to assist the rotary drilling rig 1 in construction.

[0004] In the existing technology, the anchor frame 2 only has a roller 5 directly in front of the small pulley 3 in the direction of the auxiliary winch wire rope 4 to limit the auxiliary winch wire rope 4 and prevent it from coming out of the groove of the small pulley 3. However, due to differences in operating habits and the complexity of operating conditions, there are often situations where it is necessary to pull the wire rope at an angle over a long distance in the left and right directions of the main machine (such as...). Figure 1 When the auxiliary winch wire rope 4 is used to lift steel cages, casings, etc., due to the heavy weight of the steel cages, casings, etc., during the oblique pulling process, the auxiliary winch wire rope 4 can easily come off from the small pulley 3 of the anchor frame 2 in the left and right directions, causing construction interruption and causing great trouble to the construction. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a drum bearing, an anti-derailment device, and a rotary drilling rig. The anti-derailment device can effectively prevent the winch wire rope from coming off the pulley, thereby ensuring the reliable and stable operation of the rotary drilling rig. At the same time, the oil cup on the drum bearing can improve the service life of the anti-derailment device and the winch wire rope.

[0006] This invention provides a roller bearing, comprising a shaft, bearing assemblies, and a roller; the shaft includes a main body and mounting portions and connecting portions respectively disposed at both ends of the main body, with the mounting portion at each end connected between the main body and the connecting portion; the bearing assemblies are of two types and are respectively disposed on the mounting portions at both ends of the main body, the roller is rotatably fitted onto the two bearing assemblies, and the connecting portions extend from both ends of the roller; each bearing assembly is provided with an oil cup, the oil cup communicating with the bearing assembly to inject grease into the bearing assembly.

[0007] In one specific embodiment, the bearing assembly includes a bearing, a bearing end cap, a baffle, and a bearing retaining ring; the end of the roller is provided with a flange, and the inner side of the flange is provided with a bearing receiving groove, the bearing being located within the bearing receiving groove; the bearing end cap is fixed to the end face of the flange, and the side of the bearing end cap away from the end face is provided with a baffle receiving groove, the baffle is fixed to the mounting part and located within the baffle receiving groove, the bearing retaining ring being disposed between the bearing and the baffle; the oil cup is fixed to the baffle.

[0008] In one specific embodiment, it further includes a fixing nut and a fixing washer. The mounting part is provided with a thread at one end near the connecting part. The fixing nut is fixed on the thread, and the fixing washer is located between the baffle and the fixing nut.

[0009] In one specific embodiment, the connecting portion is provided with a limiting structure.

[0010] In one specific embodiment, the baffle and the shaft are provided with oil passages, and the two ends of the oil passages are respectively connected to the oil cup and the bearing receiving groove.

[0011] The present invention also provides an anti-derailment device for preventing the winch wire rope from coming off the pulley, comprising a first fixed seat, a second fixed seat, and a plurality of the aforementioned roller bearings, wherein both ends of each roller bearing are fixed to the first fixed seat and the second fixed seat respectively; the first fixed seat and the second fixed seat are used to fix the roller bearings to the underside of the pulley, and the plurality of roller bearings are spaced apart to form a channel through which the winch wire rope passes, wherein the winch wire rope is led out from the pulley and passes through the channel.

[0012] In one specific embodiment, the number of roller bearings is two, and the two roller bearings are arranged side by side with the same tilt direction.

[0013] In one specific embodiment, the pulley is fixed on the pulley mounting base; the first mounting base includes a connecting plate and a fixing plate, the fixing plate being detachably connected to the connecting plate; both the connecting plate and the second mounting base are fixed on the pulley mounting base; the two connecting parts of the roller bearing are respectively fixed on the fixing plate and the second mounting base.

[0014] In one specific embodiment, the connecting part is provided with a limiting structure, the fixing plate is provided with a first limiting hole that cooperates with the limiting structure, and the second fixing seat is provided with a second limiting hole that cooperates with the limiting structure.

[0015] The present invention also provides a rotary drilling rig, including the above-mentioned anti-rope slippage device.

[0016] The roller bearing, anti-rope slippage device, and rotary drilling rig provided by this invention have the following beneficial effects: 1. Adding an anti-rope slippage device to the rotary drilling rig effectively solves the problem that the winch wire rope on the anchor frame is prone to slipping off the pulley when pulling the load diagonally to the left or right.

[0017] 2. The drum bearing of the anti-derailment device is equipped with a bearing assembly inside, which allows grease to be injected from the oil cups located at both ends of the drum bearing. This reduces the frictional resistance between the winch wire rope and the anti-derailment device, and improves the service life of both the anti-derailment device and the winch wire rope.

[0018] 3. The anti-rope slippage device and pulley mounting base (anchor bracket) are detachable assembly structures, which improves the convenience of subsequent maintenance and repair. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural schematic diagram of a conventional rotary drilling rig.

[0021] Figure 2 This is a schematic diagram of the anchor frame structure of a conventional rotary drilling rig.

[0022] Figure 3 This is a schematic diagram of the anchor frame structure of the rotary drilling rig according to an embodiment of the present invention. Figure 1 .

[0023] Figure 4 This is a schematic diagram of the anchor frame structure of the rotary drilling rig according to an embodiment of the present invention. Figure 2 .

[0024] Figure 5 This is a schematic diagram of the structure of a roller bearing according to an embodiment of the present invention.

[0025] Figure 6 For along Figure 5 A cross-sectional view of the CC line.

[0026] Figure 7 for Figure 6 A magnified structural diagram of region D in the middle.

[0027] Figure 8 This is a partial structural diagram of the anchor frame of the rotary drilling rig according to an embodiment of the present invention. Detailed Implementation

[0028] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. Based on the description of the present invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.

[0029] In the description of this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0030] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0031] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0032] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0033] Please refer to Figure 3 and Figure 4 The anti-derailment device is used to prevent the winch wire rope 10 from slipping off the pulley 20 (for easier viewing). Figure 1 The hoisting wire rope 10 shown in the illustration is located outside the drum bearing 30 and pulley mounting base 21 (in reality, the hoisting wire rope 10 passes through the pulley mounting base 21 and the drum bearing 30). The anti-derailment device includes a first fixing base 110, a second fixing base 120, and multiple drum bearings 30. Both ends of each drum bearing 30 are fixed to the first fixing base 110 and the second fixing base 120, respectively. The first fixing base 110 and the second fixing base 120 are used to fix the drum bearings 30 to the bottom of the pulley 20. The multiple drum bearings 30 are spaced apart to form a channel 300 through which the hoisting wire rope 10 passes. After being led out of the pulley 20, the hoisting wire rope 10 passes through the channel 300.

[0034] The present invention provides an anti-derailment device with a roller bearing 30 at the end of the winch wire rope 10 leading out from the pulley 20. The winch wire rope 10 passes through the channel 300 of the anti-derailment device. When the winch wire rope 10 is pulled obliquely in the left and right direction of the pulley 20, the anti-derailment device restricts the position of the winch wire rope 10 leading out from the pulley 20, effectively preventing the winch wire rope 10 from coming off the pulley 20.

[0035] In this embodiment, there are two roller bearings 30, which are arranged side by side with the same inclination direction, and the channel 300 is located between the two roller bearings 30. The inclination of the two roller bearings 30 allows the hoisting wire rope 10 to have a larger working space after extending within the effective range of the roller bearings 30.

[0036] Specifically, please refer to Figures 5 to 7 The roller bearing 30 includes a shaft 310, a bearing assembly 320, and a roller 330.

[0037] The shaft 310 includes a main body 311 and mounting portions 312 and connecting portions 313 respectively provided at both ends of the main body 311. The mounting portion 312 at each end is connected between the main body 311 and the connecting portion 313. That is, there are two mounting portions 312 and two connecting portions 313, and each end of the main body 311 is provided with a main body 311 and a connecting portion 313.

[0038] Two bearing assemblies 320 are respectively mounted on mounting portions 312 at both ends of the main body 311; the roller 330 is rotatably fitted onto the two bearing assemblies 320; connecting portions 313 extend from both ends of the roller 330; each bearing assembly 320 is provided with an oil cup 340, which communicates with the bearing assembly 320 to inject grease into the bearing assembly 320. By injecting grease into the bearing assembly 320 through the oil cup 340, the rotational resistance of the roller 330 can be reduced, the service life of the roller bearing 30 can be increased, and thus the service life of the anti-derailment device can be increased.

[0039] The end of the drum 330 is provided with a flange 331. The outer diameter of the flange 331 is larger than the outer diameter of the middle part of the drum 330, so that the cross section of the drum 330 is "I" shaped. When the hoisting wire rope 10 abuts against the drum bearing 30, the flange 331 can restrict the position of the hoisting wire rope 10 to the outer surface of the middle part of the drum, preventing the hoisting wire rope 10 from detaching from the drum bearing 30.

[0040] Preferably, the bearing assembly 320 includes a bearing 321, a bearing end cap 322, a baffle 323, and a bearing retaining ring 324. A bearing receiving groove 3310 is provided on the inner side of the flange 331, and the bearing 321 is located within the bearing receiving groove 3310. The bearing end cap 322 is fixed to the end face 331a of the flange 331 (i.e., the end faces of both ends of the roller 330) by multiple bolt assemblies 325. A baffle receiving groove 3220 is provided on the side of the bearing end cap 322 away from the end face 331a. The baffle 323 is fixed to the mounting part 312 by a key 326 and is partially located within the baffle receiving groove 3220. The bearing retaining ring 324 is located between the bearing 321 and the baffle 323, and is also located on the inner side of the bearing end cap 322.

[0041] The oil cup 340 is fixed on the baffle 323, specifically on the surface of the baffle 323 away from the bearing end cover 322. In this embodiment, the baffle 323 and the shaft 310 are provided with oil passages (not shown in the figure), and the two ends of the oil passages are respectively connected to the oil cup 340 and the bearing receiving groove 3310.

[0042] Furthermore, the roller bearing 30 also includes a retaining nut 351 and a retaining washer 352. The mounting portion 312 has a thread 312a near the connecting portion 313, the retaining nut 351 is fixed to the thread 312a, and the retaining washer 352 is located between the baffle 323 and the retaining nut 351. The retaining nut 351 is used to secure the bearing assembly 320 to the mounting portion 312. Simultaneously, the retaining nut 351 can be removed from the shaft 310, facilitating maintenance or repair of the bearing assembly 320.

[0043] Please participate together Figure 3 , Figure 4 and Figure 8 The pulley 20 is fixed on the pulley mounting base 21, which is set on the anchor frame 40 of the rotary drilling rig. Of course, the pulley mounting base 21 can also be set on any other engineering machinery that requires the installation of pulley 20 and winch wire rope 10.

[0044] The first fixed base 110 includes a connecting plate 111 and a fixed plate 112. The fixed plate 112 is detachably connected to the connecting plate 111. In this embodiment, the connecting plate 111 and the fixed plate 112 are provided with threaded holes, and the fixed plate 112 and the connecting plate 111 are detachably connected together by a bolt assembly 1121. The connecting plate 111 and the second fixed base 120 are both fixed to the pulley mounting base 21, for example, welded to the pulley mounting base 21.

[0045] The two connecting parts 313 of the roller bearing 30 are respectively fixed to the fixing plate 112 and the second fixing seat 120. When installing the roller bearing 30, one end of the roller bearing 30 can be first installed to the second fixing seat 120, then the fixing plate 112 is connected to the other end of the roller bearing 30, and then the fixing plate 112 is installed onto the connecting plate 111. In other embodiments, they can also be connected and fixed by welding. The connecting plate 111 and the fixing plate 112 can also be an integrally formed structure. In this embodiment, the fixing plate 112 is designed to be detachable. By disassembling the fixing plate 112, the roller bearing 30 can be removed from the pulley mounting seat 21, making maintenance and repair of the roller bearing 30 more convenient. In other embodiments, the roller bearing 30 can also be directly welded to the first fixing seat 110 and the second fixing seat 120.

[0046] Furthermore, a limiting structure 313a is provided on the connecting part 313. The roller bearing 30 is connected to the first fixed seat 110 and the second fixed seat 120 through the connecting part 313, and is axially limited by the limiting structure 313a. Specifically, the limiting structure 313a is a stop (two milled planes symmetrically arranged in this embodiment) provided on the connecting part 313. The fixing plate 112 is provided with a first limiting hole 112a that cooperates with the limiting structure 313a, and the second fixed seat 120 is provided with a second limiting hole 120a that cooperates with the limiting structure 313a. The first limiting hole 112a and the second limiting hole 120a have inner contours that match the outer contour of the limiting structure 313a. When the limiting structure 313a is inserted into the first limiting hole 112a and the second limiting hole 120a, it can restrict the shaft 310 from rotating along its axial direction.

[0047] The installation steps of the anti-rope slippage device in this embodiment include: filling the assembled roller bearings 30 with grease from the oil cups 340 at both ends; inserting the shafts at one end of the two roller bearings 30 into the second limiting holes 120a on the first fixed seat 110; inserting the other ends of the two roller bearings 30 into the first limiting holes 112a of the fixed plate 112; connecting the fixed plate 112 and the connecting plate 111 with bolt assembly 1121; and finally, passing the winch wire rope 10 through the channel 300 between the two roller bearings 30.

[0048] The anti-derailment principle of the anti-derailment device: When the winch wire rope 10 is pulled diagonally in the left and right directions, the two roller bearings 30 limit the winch wire rope 10, preventing it from detaching from the pulley 20 on the anchor frame; as the lifting action proceeds, the winch wire rope 10 extends and retracts along the roller 330 of the roller bearing 30, and the roller 330 rotates around the axis of the shaft 310 through the bearing assembly 320; due to the presence of the bearing assembly 320 and the lubricant, the frictional resistance of the winch wire rope 10 is greatly reduced, and the service life of the roller bearing 30 (anti-derailment device) and the winch wire rope 10 is improved.

[0049] The present invention also relates to a rotary drilling rig, including the above-mentioned anti-rope slippage device. Other structures of the rotary drilling rig are well known in the art and will not be described in detail here.

[0050] The roller bearing, anti-rope slippage device, and rotary drilling rig of the present invention have the following beneficial effects: 1. Adding an anti-rope slippage device to the rotary drilling rig effectively solves the problem that the winch wire rope on the anchor frame is prone to slipping off the pulley when pulling the load diagonally to the left or right.

[0051] 2. The drum bearing of the anti-derailment device is equipped with a bearing assembly inside, which allows grease to be injected from the oil cups located at both ends of the drum bearing. This reduces the frictional resistance between the winch wire rope and the anti-derailment device, and improves the service life of both the anti-derailment device and the winch wire rope.

[0052] 3. The anti-rope slippage device and pulley mounting base (anchor bracket) are detachable assembly structures, which improves the convenience of subsequent maintenance and repair.

[0053] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0054] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A roller bearing, characterized by, The shaft (310) comprises a main body part (311) and a mounting part (312) and a connecting part (313) respectively arranged at both ends of the main body part (311), the mounting part (312) at each end is connected between the main body part (311) and the connecting part (313); the number of the bearing assembly (320) is two and is arranged on the mounting part (312) at both ends of the main body part (311), the roller (330) is rotatably sleeved on the two bearing assemblies (320), the connecting part (313) extends from both ends of the roller (330); the oil cup (340) is arranged on the bearing assembly (320), and the oil cup (340) penetrates the bearing assembly (320) to inject the lubricating grease into the bearing assembly (320).

2. The drum bearing of claim 1, wherein, The bearing assembly (320) comprises a bearing (321), a bearing end cover (322), a baffle (323) and a bearing baffle ring (324); the end of the roller (330) is provided with a flange (331), the inner side of the flange (331) is provided with a bearing accommodating groove (3310), and the bearing (321) is located in the bearing accommodating groove (3310); the bearing end cover (322) is fixed on the end face (331a) of the flange (331), the side, away from the end face (331a), of the bearing end cover (322) is provided with a baffle accommodating groove (3220), the baffle (323) is fixed on the mounting part (312) and located in the baffle accommodating groove (3220), and the bearing baffle ring (324) is arranged between the bearing (321) and the baffle (323); the oil cup (340) is fixed on the baffle (323).

3. The drum bearing of claim 2, wherein, The mounting part (312) is provided with a thread (312a) at one end close to the connecting part (313), the fixed nut (351) is fixed on the thread (312a), and the fixed washer (352) is located between the baffle (323) and the fixed nut (351).

4. The drum bearing of claim 2, wherein, The connecting part (313) is provided with a limiting structure (313a).

5. The drum bearing of claim 2, wherein, The baffle (323) and the shaft (310) are provided with oil channels, and both ends of the oil channels penetrate the oil cup (340) and the bearing accommodating groove (3310) respectively.

6. A rope guard for preventing a hoisting rope (10) from coming off a sheave (20), characterized in that The device comprises a first fixing base (110), a second fixing base (120) and a plurality of drum bearings (30) as claimed in any one of claims 1-5, two ends of each of the drum bearings (30) are fixed on the first fixing base (110) and the second fixing base (120) respectively; the first fixing base (110) and the second fixing base (120) are used for fixing the drum bearings (30) below the pulley (20), a plurality of the drum bearings (30) are arranged at intervals and form a channel (300) for the hoisting wire rope (10) to pass through, the hoisting wire rope (10) is arranged in the channel (300) after being led out from the pulley (20).

7. The thread retention device of claim 6, wherein the at least one retention element is a loop. The number of the drum bearings (30) is two, and the two drum bearings (30) are arranged side by side in the same inclined direction.

8. The thread retention device of claim 6, wherein the at least one retention element is a loop. The pulley (20) is fixed on a pulley mounting base (21); the first fixing base (110) comprises a connecting plate (111) and a fixing plate (112), the fixing plate (112) is detachably connected to the connecting plate (111); the connecting plate (111) and the second fixing base (120) are both fixed on the pulley mounting base (21); the two connecting parts (313) of the drum bearings (30) are fixed on the fixing plate (112) and the second fixing base (120) respectively.

9. The thread retention device of claim 8, wherein the at least one retention element is a loop. The connecting part (313) is provided with a limiting structure (313a), the fixing plate (112) is provided with a first limiting hole (112a) matched with the limiting structure (313a), and the second fixing base (120) is provided with a second limiting hole (120a) matched with the limiting structure (313a).

10. A rotary drilling rig, characterized by The device comprises the anti-escape rope device as claimed in any one of claims 6-9. The device comprises the anti-escape rope device as claimed in any one of claims 6-9.

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