High-strength excavator revolving platform structure

Abstract

The utility model provides a high-strength excavator revolving platform structure which comprises a base and a revolving platform, a double-row different-diameter ball type slewing bearing is arranged on the base through a chassis, a supporting cylinder and a stable supporting assembly are arranged between the bottom of the revolving platform and the base, and the supporting cylinder and the stable supporting assembly are arranged between the base and the revolving platform. Secondary supporting of the rotary platform is achieved, the stability of the rotary platform in the operation process is improved, a supporting cylinder at the bottom of the rotary platform is connected with a stable supporting assembly, a limiting disc at the bottom of the supporting cylinder is rotationally connected with a limiting groove in the supporting disc, and the bottom of the supporting cylinder is slidably connected with a plurality of balls evenly arranged on the supporting groove; in the process that the rotary platform rotates along with the outer ring of the double-row different-diameter ball type slewing bearing, the stable supporting assembly supports the rotary platform, the pressure of the double-row different-diameter ball type slewing bearing is shared, and the probability that the double-row different-diameter ball type slewing bearing is damaged is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary platforms, in particular to a high-strength rotary platform structure for excavators. Background Art

[0002] The slewing platform is one of the main load-bearing mechanisms of the excavator. It needs to bear the weight of all equipment on the upper part of the platform, the tension of the boom and wire rope, the weight of the bucket material, etc. The slewing platform is a connecting component between the upper working components and the lower frame and tracks. The upper load is transmitted to the lower frame, tracks and other load-bearing equipment through the slewing platform. The slewing platform not only needs to bear all the dynamic loads when the bucket is working, but also needs to maintain the peace and stability of the excavator itself, that is, it needs to bear the weight of the materials and working components, and also needs to rotate within a certain range while bearing the load, so as to achieve the purpose of horizontal transportation and loading and unloading of materials. The slewing platform and the lower frame are usually connected through a slewing bearing.

[0003] In the prior art, the slewing platform of the excavator has to withstand high-frequency rotation during operation. The slewing platform and the lower frame are connected by a slewing bearing. As one of the key components connecting the slewing platform and the lower frame, the slewing bearing undertakes the important task of bearing and transmitting torque. It not only needs to support the weight of the slewing platform, but also needs to withstand its rotation at high frequency, so that the slewing platform may apply unequal pressures at different positions during rotation, which makes the slewing bearing easy to be damaged, increases the risk of damage to the slewing bearing, and reduces the stability of the slewing platform during operation. Utility Model Content

[0004] The purpose of the utility model is to provide a high-strength excavator slewing platform structure to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A high-strength excavator slewing platform structure comprises a base and a slewing platform, wherein a double-row different-diameter ball slewing bearing is arranged on the base through a chassis, an inner ring of the double-row different-diameter ball slewing bearing is fixedly connected to the chassis, and a rack on the inner ring of the double-row different-diameter ball slewing bearing is meshedly connected with a driving gear arranged at the bottom of the slewing platform, the driving gear is connected and fixed to a driving member arranged on the slewing platform, the slewing platform is connected and fixed to a docking plate integrally arranged on the outer ring of the double-row different-diameter ball slewing bearing by screws, a support cylinder and a stabilizing support assembly are arranged between the bottom of the slewing platform and the base, and the support cylinder and the stabilizing support assembly are used to ensure the high stability of the slewing platform operation.

[0007] Preferably, the stable support assembly includes a support plate, a support groove, balls and a limit groove. Two support plates are provided, and the two support plates are symmetrically arranged on the outer sides of the chassis. A support groove is provided on the inner side of the support plate, and a plurality of balls are evenly arranged on the support groove, and a limit groove is provided on the inner side of the support groove.

[0008] Preferably, the stable support assembly also includes a limit plate integrally arranged on the outer side of the bottom of the support tube, the support tube is fixedly installed on the bottom of the rotating platform, and the bottom of the support tube is slidingly connected to the ball bearings on the support groove, and the limit plate is rotatably connected to the limit groove.

[0009] Preferably, a fixing plate is integrally provided on the outer side of the bottom end of the supporting plate, a third mounting hole is provided on the fixing plate, and the third mounting hole is connected and fixed to a fourth mounting hole provided on the base by screws.

[0010] Preferably, a positioning groove is provided on the inner side of the bottom end of the support tube, and the positioning groove is slidably connected to the ball.

[0011] Preferably, an oil inlet is provided at the center of the support plate, and the oil inlet is communicated with the support groove and the limiting groove.

[0012] Preferably, the docking plate and the rotating platform are provided with a first mounting hole and a second mounting hole respectively, and the first mounting hole is connected and fixed to the second mounting hole by screws.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. By arranging a support cylinder and a stable support assembly between the base and the slewing platform, secondary support of the slewing platform is realized, the supporting pressure of the double-row different-diameter ball slewing bearing is reduced, and the stability of the slewing platform during operation is improved. The support cylinder at the bottom of the slewing platform is connected with the stable support assembly, so that the limit plate at the bottom of the support cylinder is rotatably connected with the limit groove on the support plate, and the bottom of the support cylinder is slidably connected with a plurality of ball bearings evenly arranged on the support groove, so that when the slewing platform rotates with the outer ring of the double-row different-diameter ball slewing bearing, the support cylinder rotates with the slewing platform in the support groove and the limit groove. At this time, the bottom of the support cylinder is slidably connected with the ball bearings, which effectively reduces the friction between the support cylinder and the support disk during rotation. The stable support assembly supports the slewing platform, shares the pressure of the double-row different-diameter ball slewing bearing, and reduces the probability of damage to the double-row different-diameter ball slewing bearing.

[0015] 2. By setting an oil inlet on the support plate, the lubricating oil is transported through the oil inlet to the contact structure between the support plate and the support cylinder. The lubricating oil enables fluid friction between the support cylinder and the support plate, thereby reducing the friction coefficient between the support cylinder and the support plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the split structure of the rotary platform and the base of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the stable support assembly of the utility model;

[0019] Figure 4 For the utility model Figure 2 The middle part is an enlarged structural diagram;

[0020] Figure 5 For the utility model Figure 3 The middle part is an enlarged structural diagram.

[0021] In the figure: 1. base; 2. slewing platform; 3. chassis; 4. double-row different-diameter ball slewing bearing; 5. driving gear; 6. support tube; 7. docking plate; 8. first mounting hole; 9. second mounting hole; 10. stable support assembly; 101. support plate; 102. support groove; 103. ball; 104. limit groove; 105. limit plate; 11. positioning groove; 12. fixing plate; 13. third mounting hole; 14. fourth mounting hole; 15. oil inlet. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-5 , the utility model provides a technical solution:

[0024] Embodiment 1:

[0025] A high-strength excavator slewing platform structure comprises a base 1 and a slewing platform 2. The slewing platform 2 is made of high-strength material to ensure high-strength support of the slewing platform 2. A double-row different-diameter ball slewing bearing 4 is arranged on the base 1 through a chassis 3. The double-row different-diameter ball slewing bearing 4 is arranged to achieve meshing connection with a driving gear 5 on a driving member, thereby realizing the rotation of the slewing platform 2. The double-row different-diameter ball slewing bearing 4 can bear large radial loads, axial loads and tipping loads during the rotation process, thereby ensuring high stability of the slewing platform 2 during operation. The inner ring of the double-row different-diameter ball slewing bearing 4 is fixedly connected to the chassis 3, and the rack on the inner ring of the double-row different-diameter ball slewing bearing 4 is connected to the rack arranged on the bottom of the slewing platform 2. The driving gear 5 of the rotating platform 2 is meshed and connected, and the driving gear 5 is connected and fixed to the driving member arranged on the rotating platform 2. The rotating platform 2 is connected and fixed to the docking plate 7 integrally arranged on the outer ring of the double-row different-diameter ball slewing bearing 4 by screws. The docking plate 7 and the rotating platform 2 are correspondingly provided with a first mounting hole 8 and a second mounting hole 9. The first mounting hole 8 is connected and fixed to the second mounting hole 9 by screws, so that the rotating platform 2 is fixedly connected to the outer ring of the double-row different-diameter ball slewing bearing 4, and the outer ring of the double-row different-diameter ball slewing bearing 4 drives the rotating platform 2 to rotate. A support tube 6 and a stable support assembly 10 are arranged between the bottom of the rotating platform 2 and the base 1. The support tube 6 and the stable support assembly 10 are used to ensure the high stability of the operation of the rotating platform 2.

[0026] The stable support assembly 10 includes a support plate 101, a support groove 102, a ball 103 and a limit groove 104. Two support plates 101 are provided, and the two support plates 101 are symmetrically arranged on the outer side of the chassis 3. A support groove 102 is provided on the inner side of the support plate 101. A plurality of ball 103 are evenly arranged on the support groove 102, and a limit groove 104 is provided on the inner side of the support groove 102. The stable support assembly 10 also includes a limit plate 105 integrally arranged on the outer side of the bottom of the support cylinder 6. The support cylinder 6 is fixedly installed on the bottom of the rotating platform 2, and the bottom of the support cylinder 6 is slidingly connected to the ball 103 on the support groove 102, and the limit plate 105 is rotatably connected to the limit groove 104.

[0027] A positioning groove 11 is provided on the inner side of the bottom end of the support tube 6, and the positioning groove 11 is slidably connected to the ball 103. By providing the positioning groove 11 on the inner side of the bottom end of the support tube 6, the ball 103 is slidably connected in the positioning groove 11 and the inner side thereof, thereby realizing the positioning sliding function.

[0028] By arranging a support cylinder 6 and a stable support assembly 10 between the base 1 and the slewing platform 2, the stability of the slewing platform 2 during rotation is enhanced during the process of the slewing platform 2 and the double-row different-diameter ball slewing bearing 4 being connected and rotated, and the problem that the double-row different-diameter ball slewing bearing is easily damaged is effectively avoided, thereby realizing the secondary support of the slewing platform 2, reducing the supporting pressure of the double-row different-diameter ball slewing bearing 4, and improving the stability of the slewing platform 2 during operation. The support cylinder 6 at the bottom of the slewing platform 2 is connected with the stable support assembly 10, so that the limit plate 105 at the bottom of the support cylinder 6 and the limit groove on the support plate 101 are connected. 104 is rotatably connected, and the bottom of the support cylinder 6 is slidably connected with multiple balls 103 evenly arranged on the support groove 102, so that when the rotating platform 2 rotates with the outer ring of the double-row different-diameter ball slewing bearing 4, the support cylinder 6 rotates with the rotating platform 2 in the support groove 102 and the limit groove 104. At this time, the bottom of the support cylinder 6 is slidably connected with the balls 103, which effectively reduces the friction between the support cylinder 6 and the support plate 101 during rotation, stabilizes the support assembly 10 to support the rotating platform 2, shares the pressure of the double-row different-diameter ball slewing bearing 4, and reduces the probability of damage to the double-row different-diameter ball slewing bearing 4.

[0029] A fixing plate 12 is integrally provided on the outer side of the bottom end of the support plate 101, and a third mounting hole 13 is provided on the fixing plate 12. The third mounting hole 13 is connected and fixed to a fourth mounting hole 14 provided on the base 1 by screws. By providing the fixing plate 12 on the outer side of the bottom end of the support plate 101, the two groups of stable support assemblies 10 are docked, installed and fixed, making disassembly and assembly more convenient, and facilitating the maintenance of the double-row different-diameter ball slewing bearing 4.

[0030] An oil inlet 15 is provided at the center of the support plate 101, and the oil inlet 15 is connected to the support groove 102 and the limit groove 104. By arranging the oil inlet 15 on the support plate 101, the lubricating oil can be transported to the contact structure between the support plate 101 and the support cylinder 6 through the oil inlet 15. The lubricating oil enables fluid friction between the support cylinder 6 and the support plate 101, thereby reducing the friction coefficient between the support cylinder 6 and the support plate 101.

[0031] Working principle: First, during installation and fixing, the second mounting hole 9 on the slewing platform 2 is aligned with the first mounting hole 8 on the docking plate 7 on the double-row different-diameter ball slewing bearing 4 on the upper part of the chassis 3, and the slewing platform 2 and the docking plate 7 are connected and fixed by mounting screws, and the driving gear 5 is meshed with the rack inside the double-row different-diameter ball slewing bearing 4, and then two sets of stable support components 10 are installed, and the third mounting hole 13 on the fixed plate 12 at the bottom end of the support plate 101 is aligned with the fourth mounting hole 14 on the base 1, and the support plate 101 is fixed to the base 1 by mounting screws, and when the support plate 101 is installed, the limiting groove 104 on the support plate 101 is installed from the side corresponding to the limiting plate 105, so that the limiting plate 105 is inserted into the limiting groove 104, and at the same time, the positioning groove 11 on the inner side of the bottom end of the support tube 6 is in contact with the ball 103 The limit plate 105 is touched to rotate in the limit groove 104, and the ball 103 slides between the positioning groove 11 during the rolling process, and the slewing platform 2 is supported twice by the stable support assembly 10, which distributes the pressure of the double-row different-diameter ball slewing bearing 4 and reduces the probability of damage to the double-row different-diameter ball slewing bearing 4. The driving gear 5 is driven to rotate by the driving member, so that the driving gear 5 is meshed with the rack inside the double-row different-diameter ball slewing bearing 4, and the outer ring and inner ring of the double-row different-diameter ball slewing bearing 4 rotate through the double-row different-diameter balls, so that the outer ring of the double-row different-diameter ball slewing bearing 4 drives the slewing platform 2 to rotate. During the rotation, the support tube 6 at the bottom of the slewing platform 2 rotates in the stable support assembly 10 to realize secondary rotation support, thereby ensuring the high stability of the slewing platform 2 during operation.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-strength excavator slewing platform structure, comprising a base (1) and a slewing platform (2), characterized in that: A double-row different-diameter ball slewing bearing (4) is arranged on the base (1) through the chassis (3); the inner ring of the double-row different-diameter ball slewing bearing (4) is fixedly connected to the chassis (3); and the rack on the inner ring of the double-row different-diameter ball slewing bearing (4) is meshingly connected to a driving gear (5) arranged at the bottom of the slewing platform (2); the driving gear (5) is connected and fixed to a driving member arranged on the slewing platform (2); the slewing platform (2) is connected and fixed to a docking plate (7) integrally arranged on the outer ring of the double-row different-diameter ball slewing bearing (4) through screws; a support cylinder (6) and a stabilizing support assembly (10) are arranged between the bottom of the slewing platform (2) and the base (1); the support cylinder (6) and the stabilizing support assembly (10) are used to ensure high stability of the operation of the slewing platform (2); The stable support assembly (10) comprises a support plate (101), a support groove (102), a ball bearing (103) and a limiting groove (104); two support plates (101) are provided, and the two support plates (101) are symmetrically arranged on the outside of the chassis (3); a support groove (102) is provided on the inside of the support plate (101); a plurality of ball bearings (103) are evenly arranged on the support groove (102); and a limiting groove (104) is provided on the inside of the support groove (102); The stable support assembly (10) further comprises a limit plate (105) integrally arranged on the outer side of the bottom of the support cylinder (6); the support cylinder (6) is fixedly mounted on the bottom of the rotary platform (2); the bottom of the support cylinder (6) is slidably connected to the ball bearing (103) on the support groove (102); and the limit plate (105) is rotatably connected to the limit groove (104).

2. The high-strength excavator rotary platform structure according to claim 1, characterized in that: A fixing plate (12) is integrally provided on the outer side of the bottom end of the support plate (101), a third mounting hole (13) is provided on the fixing plate (12), and the third mounting hole (13) is connected and fixed to a fourth mounting hole (14) provided on the base (1) by means of screws.

3. The high-strength excavator rotary platform structure according to claim 2, characterized in that: A positioning groove (11) is provided on the inner side of the bottom end of the support tube (6), and the positioning groove (11) is slidably connected to the ball (103).

4. The high-strength excavator rotary platform structure according to claim 2, characterized in that: An oil inlet (15) is provided at the center of the support plate (101), and the oil inlet (15) is connected to the support groove (102) and the limit groove (104).

5. The high-strength excavator rotary platform structure according to claim 1, characterized in that: The docking plate (7) and the rotary platform (2) are provided with a first mounting hole (8) and a second mounting hole (9) correspondingly, and the first mounting hole (8) is connected and fixed to the second mounting hole (9) by means of screws.

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