Novel frame type gear structure for slewing mechanism of pile driver

Abstract

The utility model discloses a novel frame type gear structure for a slewing mechanism of a pile driver, which comprises a slewing bearing arranged on the pile driver, and the slewing bearing comprises a slewing bearing outer ring, a slewing bearing inner ring and a slewing bearing protective shell; a mounting hole is formed in the slewing bearing protection shell, a frame type bearing seat is arranged in the mounting hole, a large bearing and a small bearing are coaxially arranged in the frame type bearing seat, a hydraulic motor is arranged above the frame type bearing seat, a rotating shaft of the hydraulic motor penetrates through the large bearing, and the bottom end of the rotating shaft is arranged in the small bearing; a gear is arranged on the portion, between the large bearing and the small bearing, of the rotating shaft, a gear window is formed in the side wall of the frame type bearing seat, a gear ring is arranged outside the slewing bearing outer ring, the slewing bearing outer ring is connected with the suspension arm, and a rotating disc is arranged between the slewing bearing inner ring and the slewing bearing protection shell. The hydraulic motor output shaft, the pinion and the large and small bearings are all on the same center line, so that the hydraulic motor shaft is effectively prevented from skewing.

Description

Technical Field

[0001] The utility model relates to the technical field of pile drivers, and more particularly to a novel frame-type gear structure for the slewing mechanism of a pile driver. Background Art

[0002] A pile driver is a common heavy construction machinery, mainly used for driving or extracting pile foundations underground to support buildings or other structures, and is widely used in the construction industry, bridge construction, wharf engineering, oilfield development and other fields. In addition, in the construction of highways, pile drivers also play a crucial role in various fields such as the foundation treatment of simple bridges, subgrade treatment, and foundation treatment of retaining walls.

[0003] The slewing mechanism of a pile driver is an essential part of the pile driver. It is driven by a medium-speed hydraulic motor through a reducer, and cooperates with the work of four outrigger cylinders to achieve 360-degree slewing of the pile driver. This design enables the pile driver to rotate flexibly during construction to adapt to construction requirements at different angles.

[0004] A special slewing mechanism for a pile driver disclosed in the patent 201621397298.5 applied by our company earlier sets a slewing bearing on the pile driver and realizes 360° rotation through a hydraulic rotary joint in cooperation with the slewing bearing, so as to realize the arbitrary rotation of the boom. However, in this patent, the hydraulic motor driving installation form drives the boom to rotate through a hydraulic rotary joint. During use, when the hydraulic rotary joint is offset, problems such as gear set meshing jamming and motor shaft skew are likely to occur. During a long-term skewed working process, the motor shaft is likely to break, and a new hydraulic motor needs to be replaced, resulting in a relatively high maintenance cost. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a novel frame-type gear structure for the slewing mechanism of a pile driver, which can avoid the skew of the hydraulic motor shaft, improve the service life of the hydraulic motor, and reduce the maintenance cost.

[0006] To solve the above technical problems, the following technical solutions are adopted by the utility model.

[0007] A novel frame-type gear structure for the slewing mechanism of a pile driver, comprising a slewing bearing arranged on the pile driver. The slewing bearing includes an outer ring of the slewing bearing, an inner ring of the slewing bearing, and a protective shell of the slewing bearing. An installation hole is provided on the protective shell of the slewing bearing, and a frame-type bearing seat is arranged in the installation hole. A large bearing and a small bearing are coaxially arranged at the upper and lower ends inside the frame-type bearing seat. A hydraulic motor is arranged above the frame-type bearing seat through bolts. The rotating shaft of the hydraulic motor passes through the large bearing, and the bottom end of the rotating shaft is arranged inside the small bearing. A gear is arranged on the rotating shaft between the large bearing and the small bearing. A gear window is provided on the side wall of the frame-type bearing seat. A gear ring meshing with the gear is arranged outside the outer ring of the slewing bearing. The outer ring of the slewing bearing is connected to the boom, and a turntable is arranged between the inner ring of the slewing bearing and the protective shell of the slewing bearing through bolts.

[0008] Further optimizing the technical solution, a plurality of threaded holes for installing the frame-type bearing seat are provided beside the installation hole on the protective shell of the slewing bearing. The frame-type bearing seat is arranged on the installation hole of the protective shell of the slewing bearing through bolts passing through the threaded holes.

[0009] Further optimizing the technical solution, a hole retaining ring for restricting the axial movement of the large bearing is arranged in the bearing hole at the upper end of the large bearing.

[0010] Due to the adoption of the above technical solutions, the technical progress obtained by the present utility model is as follows.

[0011] A novel frame-type gear structure for the slewing mechanism of a pile driver provided by the present utility model adopts a frame-type gear structure, and bearings are arranged on both the upper and lower sides of the gear, so that the output shaft of the hydraulic motor, the pinion, and the large and small bearings are all on the same center line, effectively avoiding the skew of the hydraulic motor shaft, improving the service life of the hydraulic motor, and reducing the maintenance cost. Brief Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of the present utility model;

[0013] Figure 2 is an installation schematic diagram of the present utility model;

[0014] Figure 3 is an exploded structural diagram of the present utility model and the boom.

[0015] Wherein: 1. Hydraulic motor, 2. Hole retaining ring, 3. Large bearing, 4. Gear, 5. Small bearing, 6. Frame-type bearing seat, 7. Slewing bearing, 71. Outer ring of the slewing bearing, 72. Inner ring of the slewing bearing, 73. Protective shell of the slewing bearing, 8. Installation hole, 9. Gear window, 10. Boom, 11. Turntable. Detailed Description of the Embodiment

[0016] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] A novel frame-type gear structure for the slewing mechanism of a pile driver, in combination with Figure 1 As shown, it includes a slewing bearing 7 arranged on the pile driver. The slewing bearing 7 includes a slewing bearing outer ring 71, a slewing bearing inner ring 72, and a slewing bearing protective housing 73. An installation hole 8 is opened on the slewing bearing protective housing 73. A frame-type bearing seat 6 is arranged in the installation hole 8. A large bearing 3 and a small bearing 5 are respectively arranged at the upper and lower ends inside the frame-type bearing seat 6, and the large bearing 3 and the small bearing 5 are coaxially arranged.

[0018] Above the frame-type bearing seat 6, a hydraulic motor 1 is arranged through bolts. The rotating shaft of the hydraulic motor 1 passes through the large bearing 3, and the bottom end of the rotating shaft is arranged inside the small bearing 5. A gear 4 is arranged on the rotating shaft between the large bearing 3 and the small bearing 5. A gear window 9 is opened on the side wall of the frame-type bearing seat 6, and the gear extends out from the gear window 9..

[0019] A gear ring is arranged outside the slewing bearing outer ring 71. The gear ring meshes with the gear 4. The slewing bearing outer ring 71 is connected to the boom 10 through bolts. A turntable 11 is arranged between the slewing bearing inner ring 72 and the slewing support protective housing 73 through bolts. The turntable 11 is installed on the pile driver. The gear extends out from the gearbox and meshes with the gear ring on the slewing bearing outer ring. The hydraulic motor drives the gear to rotate, driving the slewing bearing outer ring to rotate, thereby driving the boom to rotate.

[0020] In order to facilitate the disassembly of the frame-type bearing seat 6, a plurality of threaded holes are opened beside the installation hole of the slewing bearing protective housing 73. The frame-type bearing seat 6 is arranged in the installation hole of the slewing bearing protective housing 73 through bolts passing through the threaded holes.

[0021] A hole retaining ring 2 is arranged in the bearing hole inside the upper end of the large bearing 3 to prevent the large bearing 3 from axially moving.

[0022] The installation structure schematic diagram of the present utility model and the boom is as shown in Figure 2 and 3 As shown, the hydraulic motor drives the gear to rotate through the bearing, driving the slewing bearing outer ring inside the slewing bearing to rotate. Since both the slewing bearing inner ring and the slewing bearing protective housing are fixed on the pile driver through the turntable, the slewing bearing outer ring rotates to drive the boom to rotate. Since both sides of the gear are fixed by bearings, the rotating shaft of the hydraulic motor, the gear, the large bearing, and the small bearing are all on the same center line, and the gear will not tilt when meshing with the gear ring inside the slewing bearing, thus avoiding the skew of the rotating shaft of the hydraulic motor and extending the service life of the hydraulic motor and its matching parts.

Claims

1. A novel frame-type gear structure for the slewing mechanism of a pile driver, comprising a slewing bearing (7) provided on the pile driver, the slewing bearing (7) including a slewing bearing outer ring (71), a slewing bearing inner ring (72) and a slewing bearing protective housing (73); characterized in that: The slewing bearing protective housing (73) is provided with mounting holes (8), and a frame-type bearing seat (6) is arranged in the mounting holes (8). A large bearing (3) and a small bearing (5) are coaxially arranged at the upper and lower ends inside the frame-type bearing seat (6). A hydraulic motor (1) is arranged above the frame-type bearing seat (6) through bolts. The rotating shaft of the hydraulic motor (1) passes through the large bearing (3), and the bottom end of the rotating shaft is arranged inside the small bearing (5). A gear (4) is arranged on the rotating shaft between the large bearing (3) and the small bearing (5). A gear window (9) is opened on the side wall of the frame-type bearing seat (6). An external gear ring that meshes with the gear (4) is arranged outside the slewing bearing outer ring (71). The slewing bearing outer ring (71) is connected to the boom (10). A turntable (11) is arranged between the slewing bearing inner ring (72) and the slewing bearing protective housing (73) through bolts.

2. The novel frame-type gear structure for the slewing mechanism of a pile driver according to claim 1, wherein: A plurality of threaded holes for mounting the frame-type bearing seat are opened beside the mounting holes (8) on the slewing bearing protective housing (73). The frame-type bearing seat (6) is arranged on the mounting holes of the slewing bearing protective housing (73) through bolts passing through the threaded holes.

3. A novel frame-type gear structure for the slewing mechanism of a pile driver according to claim 1, characterized in that: A hole retaining ring (2) for restricting the axial movement of the large bearing (3) is arranged in the bearing hole at the upper end of the large bearing (3).

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