Mounting bracket structure for speed reducer of crawler crane

Abstract

The utility model discloses a crawler crane speed reducer installation support structure which comprises a rack and a speed reducer support, the speed reducer support comprises a shell and a sealing cover plate, the top end face of the shell and the end of the rack are fixedly installed, the sealing cover plate is installed on the bottom end face of the shell in a sealed mode, and the sealing cover plate is fixedly installed through bolts. A first fixing groove is formed in the bottom end face of the shell, a first sealing groove is formed in the outer edge of the bottom end face of the shell in the circumferential direction, a fixing protrusion matched with the first fixing groove in the circumferential direction is arranged on the top end face of the sealing cover plate, a first sealing ring and a second sealing groove are arranged in the first sealing groove, and a second sealing ring and a third sealing ring are correspondingly arranged in the third sealing groove. The speed reducer has the technical advantages that abrasion between gears of the speed reducer is reduced, lubrication is achieved, cleaning is achieved, bolts at the butt joint installation position of the shell and the sealing cover plate are installed cleanly, blocking wires are prevented from being fixed, and convenience of disassembly and installation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of crawler cranes, and particularly relates to a mounting bracket structure for a reducer of a crawler crane. Background Art

[0002] Crawler cranes have gradually become the main force in engineering construction due to their unique advantages such as large lifting capacity, large working space, ability to travel with load, and small ground bearing pressure. They had a "blowout" development in 2006, with a year-on-year growth of 97.8%; in 2007, they reached a new high with an increase rate of over 90%, and the production and sales volume exceeded 1,000 units, creating a record high; in 2008, the production and sales volume exceeded 1,800 units. Now a series of products with a capacity of 35 - 1000t have been formed, and 1600 and 2000t-class crawler cranes also made their debut at the Shanghai Bauma Exhibition in 2010. It can be predicted that crawler cranes will still maintain rapid development in the future. The key supporting components of crawler cranes - reducers (including hoisting reducers, luffing reducers, slewing reducers, and traveling reducers) have also developed rapidly.

[0003] Publication (Announcement) Number: CN212559159U, which discloses a reducer for slewing of a port crane, relating to the technical field of port cranes, including a reducer body and a carrying mechanism. In this reducer for slewing of a port crane, the top outer surface of the metal collar is welded to the bottom outer surface of the hanging ear, a round opening is provided in the middle of the outer surface of the hanging ear, the top outer surface of the metal hook is welded to the bottom outer surface of the small ring, the top outer surface of the connecting hook is welded to the bottom left side of the outer surface of the bent handle, the middle of the outer surface of the bent handle is sleeved with the inner surface of the rough leather sleeve, the other end of the outer surface of the reducer body is fixedly connected to one side of the outer surface of the second ferry ring, and the bottom left side of the outer surface of the reducer body is fixedly connected to the top of the outer surface of the auxiliary body.

[0004] In the prior art: at the installation position between the reducer installation housing and the sealing cover plate, it is only fixed by bolts. This structure results in poor strength of the sealing installation structure. During the use of the crane, due to complex environments such as large dust and high vibration frequency, the sealing installation at the installation position is required to solve the problems in the prior art, such as the entry of dust, fine particles and other sundries, which causes serious wear of the internal gear disks of the reducer, the turbidity of the lubricating oil in the housing and the dissolution of impurities, as well as the fixing and blocking of the bolts at the installation position between the housing and the sealing cover plate, increasing the disassembly difficulty.

[0005] Therefore, a mounting bracket structure for a reducer of a crawler crane needs to be provided. Content of the Utility Model

[0006] Aiming at the problems existing in the above prior art, the utility model provides a mounting bracket structure for a reducer of a crawler crane, aiming to solve the above-mentioned technical problems.

[0007] To achieve the above object, the utility model is realized through the following technical solutions: A structure of a reduction gearbox mounting bracket for a crawler crane, comprising a frame and a reduction gearbox bracket. The reduction gearbox bracket includes a housing and a sealing cover plate. The top end face of the housing is fixedly installed at the end of the frame. The bottom end face of the housing is hermetically installed with a sealing cover plate and fixedly installed by bolts. A first fixing groove is opened on the bottom end face of the housing, and a first sealing groove is circumferentially opened at the outer edge of the bottom end face of the housing. The top end face of the sealing cover plate is circumferentially provided with fixing protrusions matching the first fixing groove. A second sealing groove is circumferentially opened on the outer peripheral surface of the fixing protrusion, and a third sealing groove is circumferentially opened on the inner peripheral surface of the fixing protrusion. A first sealing ring is arranged inside the first sealing groove, and corresponding second and third sealing rings are arranged in the second and third sealing grooves. A fourth sealing groove is circumferentially opened outside the top end face of the sealing cover plate. The fixing protrusion and the top end face of the sealing cover plate jointly form a first screw hole, and a second threaded hole is arranged inside the first fixing groove. When the housing and the sealing cover plate are hermetically installed: the fixing protrusions are inserted into the first fixing groove, the second sealing ring is hermetically installed with the outer side wall of the first fixing groove, the third sealing ring is hermetically installed with the inner side wall of the first fixing groove, the fourth sealing groove is aligned with the first sealing groove, so that the first sealing ring is hermetically installed between the fourth sealing groove and the first sealing groove, and then the first screw hole and the second threaded hole are installed with bolts to hermetically install between the housing and the sealing cover plate.

[0008] Preferably, the grooving diameters of the second sealing groove and the third sealing groove are equal.

[0009] Preferably, the diameters of the second sealing groove and the third sealing groove are both smaller than the dimension between the first sealing ring or the fourth sealing ring.

[0010] Preferably, the top end face of the housing is provided with anti-loosening screws.

[0011] Preferably, the materials of the first sealing ring, the second sealing ring and the third sealing ring are all made of polytetrafluoroethylene.

[0012] In summary, the utility model provides a structure of a reduction gearbox mounting bracket for a crawler crane. When the housing and the sealing cover plate are hermetically installed: the fixing protrusions are inserted into the first fixing groove, the second sealing ring is hermetically installed with the outer side wall of the first fixing groove, the third sealing ring is hermetically installed with the inner side wall of the first fixing groove, the fourth sealing groove is aligned with the first sealing groove, so that the first sealing ring is hermetically installed between the fourth sealing groove and the first sealing groove, and then the first screw hole and the second threaded hole are installed with bolts to hermetically install between the housing and the sealing cover plate, realizing the hermetic installation at the butt joint of the housing and the sealing cover plate, solving the problem that dust particles and other sundries enter the reduction gearbox due to factors such as complex construction site environment and large vibration frequency, solving the reduction of wear between the reduction gearbox gears, and having the technical advantages of clean use of lubrication, as well as clean installation of bolts at the butt joint of the housing and the sealing cover plate, avoiding blockage and fixing, and improving the convenience of disassembly and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural view of the frame and the reducer support of the present utility model;

[0014] Figure 2 is a schematic view of the dissection of the reducer support structure of the present utility model;

[0015] Figure 3 is a schematic structural view of the connection between the housing and the sealing cover plate of the present utility model;

[0016] Figure 4 is a schematic structural view of the installation of the first sealing groove and the first sealing ring of the present utility model;

[0017] In the figure: frame 1, reducer support 2, housing 3, sealing cover plate 4, first fixing groove 5, first sealing groove 6, fixing protrusion 7, second sealing groove 11, third sealing groove 12, first sealing ring 13, second sealing ring 14, third sealing ring 15, fourth sealing groove 16, first screw hole 17, second threaded hole 21, anti-loosening screw 22. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The present utility model will be further described below with reference to the accompanying drawings.

[0019] As Figures 1 to 4 shown:

[0020] The utility model relates to a mounting bracket structure for a speed reducer of a crawler crane, which comprises a frame 1 and a speed reducer bracket 2. The speed reducer bracket 2 includes a housing 3 and a sealing cover plate 4. The top end face of the housing 3 is fixedly installed at the end of the frame 1. The bottom end face of the housing 3 is hermetically installed with a sealing cover plate 4 and is fixedly installed by bolts. A first fixing groove 5 is formed in the bottom end face of the housing 3, and a first sealing groove 6 is circumferentially formed at the outer edge of the bottom end face of the housing 3. A fixing protrusion 7 is circumferentially and correspondingly arranged on the top end face of the sealing cover plate 4 to match the first fixing groove 5. A second sealing groove 11 is circumferentially formed on the outer peripheral surface of the fixing protrusion 7, and a third sealing groove 12 is circumferentially formed on the inner peripheral surface of the fixing protrusion 7. A first sealing ring 13 is arranged inside the first sealing groove 6, and corresponding second sealing rings 14 and third sealing rings 15 are arranged in the second sealing groove 11 and the third sealing groove 12 respectively. A fourth sealing groove 16 is circumferentially formed outside the top end face of the sealing cover plate 4. A first screw hole 17 is formed jointly by the fixing protrusion 7 and the top end face of the sealing cover plate 4, and a second threaded hole 21 is arranged inside the first fixing groove 5. When the housing 3 and the sealing cover plate 4 are hermetically installed: the fixing protrusion 7 is inserted into the first fixing groove 5, the second sealing ring 14 is hermetically installed with the outer side wall of the first fixing groove 5, the third sealing ring 15 is hermetically installed with the inner side wall of the first fixing groove 5, the fourth sealing groove 16 is installed in alignment with the first sealing groove 6 so that the first sealing ring 13 is hermetically installed between the fourth sealing groove 16 and the first sealing groove 6, and then the first screw hole 17 and the second threaded hole 21 are installed with bolts to hermetically install the housing 3 and the sealing cover plate 4.

[0021] To solve the problems of poor sealing effect at the docking installation of the housing 3 and the sealing cover plate 4 in the prior art, reduce the internal wear of the speed reducer, and facilitate disassembly, the structure adopted in this patent is as follows: Reducer brackets 2 are distributed on both sides of the frame 1, and a speed reducer is arranged inside the reducer bracket 2 to drive the crawler. The reducer bracket 2 includes a housing 3 and a sealing cover plate 4. A fixing protrusion 7 is circumferentially and fixedly arranged in a matching fixing groove 5 on the top end face of the sealing cover plate 4. A second sealing groove 11 is circumferentially opened on the outer peripheral surface of the fixing protrusion 7, and a third sealing groove 12 is circumferentially opened on the inner peripheral surface of the fixing protrusion 7. A second sealing ring 14 and a third sealing ring 15 are correspondingly arranged in the second sealing groove 11 and the third sealing groove 12. A fourth sealing groove 16 is circumferentially opened outside the top end face of the sealing cover plate 4. The sealing cover plate 4 is hermetically installed on the bottom end face of the housing 3 and fixedly installed by bolts. A fixing groove 5 is opened on the bottom end face of the housing 3, and a first sealing groove 6 is circumferentially opened at the outer edge of the bottom end face of the housing 3. A first sealing ring 13 is arranged inside the first sealing groove 6. When the housing 3 and the sealing cover plate 4 are hermetically installed: The fixing protrusion 7 is inserted and installed in the fixing groove 5, the second sealing ring 14 is hermetically installed with the outer side wall of the fixing groove 5, the third sealing ring 15 is hermetically installed with the inner side wall of the fixing groove 5, the fourth sealing groove 16 and the first sealing groove 6 are installed in alignment, so that the first sealing ring 13 is hermetically installed between the fourth sealing groove 16 and the first sealing groove 6. Then, a first bolt installation hole 17 and a second threaded hole 21 are installed through bolts to hermetically install the housing 3 and the sealing cover plate 4, realizing the hermetic installation at the docking installation of the housing 3 and the sealing cover plate 4, solving the problem that dust particles and other sundries enter the speed reducer housing due to factors such as complex construction site environment and large vibration frequency, solving the technical advantages of reducing the wear between the speed reducer gears and having clean lubrication, and the bolts at the docking installation of the housing 3 and the sealing cover plate 4 are cleanly installed, avoiding blockage and fixing, and improving the convenience of disassembly and installation.

[0022] In at least one embodiment, in order to achieve the sealing effect when the fixing protrusion 7 is inserted and installed in the fixing groove 5, the opening diameters of the second sealing groove 11 and the third sealing groove 12 are made equal, and the second sealing ring 14 and the third sealing ring 15 are correspondingly and hermetically installed inside the fixing groove 5 to achieve the hermetic installation of the fixing protrusion 7.

[0023] In at least one embodiment, in order to improve the sealing effect at the docking installation of the housing 3 and the sealing cover plate 4, the following is adopted: The diameters of the second sealing groove 11 and the third sealing groove 12 are both smaller than the dimension between the first sealing ring 13 or the fourth sealing ring, so that the internal gap uses a sealing ring with a smaller diameter dimension, and a sealing ring with a larger diameter dimension is used for sealing protection on the outside, realizing the sealing effect of internal and external cooperation.

[0024] In at least one embodiment, in order to quickly and conveniently install the housing 3 and the frame 1, anti-loosening screws 22 are pre-set on the top end face of the housing 3, improving the installation efficiency.

[0025] In at least one embodiment, in order to improve the high temperature resistance and corrosion resistance for sealing use, material selection is adopted: the materials of the first sealing ring 13, the second sealing ring 14, and the third sealing ring 15 are all made of polytetrafluoroethylene.

[0026] The embodiments in the present utility model are only used to illustrate the present utility model and do not constitute a limitation on the scope of the claims. Other substantially equivalent alternatives that can be conceived by those skilled in the art are all within the protection scope of the present utility model.

Claims

1. A structure of a reduction gearbox installation bracket for a crawler crane, characterized in that, It includes a frame (1) and a speed reducer support (2). The speed reducer support (2) includes a housing (3) and a sealing cover plate (4). The top end face of the housing (3) is fixedly installed at the end of the frame (1). The bottom end face of the housing (3) is hermetically installed with the sealing cover plate (4) and is fixedly installed by bolts. A first fixing groove (5) is opened on the bottom end face of the housing (3), and a first sealing groove (6) is circumferentially opened at the outer edge of the bottom end face of the housing (3). A fixing protrusion (7) is circumferentially and correspondingly arranged on the top end face of the sealing cover plate (4) to match the first fixing groove (5). A second sealing groove (11) is circumferentially opened on the outer peripheral surface of the fixing protrusion (7), and a third sealing groove (12) is circumferentially opened on the inner peripheral surface of the fixing protrusion (7). A first sealing ring (13) is arranged inside the first sealing groove (6), and corresponding second sealing rings (14) and third sealing rings (15) are arranged for the second sealing groove (11) and the third sealing groove (12). A fourth sealing groove (16) is circumferentially opened on the outer periphery of the top end face of the sealing cover plate (4). A first screw hole (17) is jointly opened on the fixing protrusion (7) and the top end face of the sealing cover plate (4). A second threaded hole (21) is arranged inside the first fixing groove (5). When the housing (3) and the sealing cover plate (4) are hermetically installed: the fixing protrusion (7) is inserted and installed in the first fixing groove (5), the second sealing ring (14) is hermetically installed with the outer side wall of the first fixing groove (5), the third sealing ring (15) is hermetically installed with the inner side wall of the first fixing groove (5), the fourth sealing groove (16) and the first sealing groove (6) are installed in alignment so that the first sealing ring (13) is hermetically installed between the fourth sealing groove (16) and the first sealing groove (6), and then the first screw hole (17) and the second threaded hole (21) are installed with bolts to seal and install between the housing (3) and the sealing cover plate (4).

2. The installation bracket structure of a crawler crane reducer according to claim 1, characterized in that, The grooving diameters of the second sealing groove (11) and the third sealing groove (12) are equal.

3. A structure of a reduction gearbox mounting bracket for a crawler crane according to claim 1, characterized in that, The diameter sizes of the second sealing groove (11) and the third sealing groove (12) are both smaller than the dimension between the first sealing ring (13) or the fourth sealing ring.

4. A structure of a reduction gearbox mounting bracket for a crawler crane according to claim 1, characterized in that, A locknut (22) is arranged on the top end face of the housing (3).

5. The structure of a reduction gearbox mounting bracket for a crawler crane according to claim 1, wherein, The materials of the first sealing ring (13), the second sealing ring (14), and the third sealing ring (15) are all made of polytetrafluoroethylene.

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