Slewing driving device of hydraulic excavator

Abstract

The utility model discloses a rotary driving device of a hydraulic excavator, which belongs to the technical field of rotary driving and is characterized in that a rotating ring is rotatably arranged in a bottom shell, a lower supporting seat matched with a lower locking ring is movably mounted at the bottom of the bottom shell, a plurality of groups of first open grooves are formed in the inner wall of the lower supporting seat, and first balls are mounted in the first open grooves; the outer wall of the lower locking ring is provided with a lower concave ring matched with the first balls, the inner wall of the upper supporting seat is provided with multiple sets of second open grooves, second balls are installed in the second open grooves, and the outer wall of the upper locking ring is provided with an upper concave ring matched with the second balls. A plurality of groups of locking structures are arranged on the top cover, and lock holes matched with the locking structures are formed in the inner wall of the bottom shell. Multiple locking can be performed on the rotating ring through cooperation of the lower supporting seat and the upper supporting seat, friction force during rotation can be greatly reduced through cooperation of the first ball and the second ball, and the bottom shell and the top cover can be quickly disassembled and assembled through the locking structure according to actual requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary drive, in particular to a rotary drive device of a hydraulic excavator. Background Art

[0002] The slewing drive device is also called a slewing reducer, a gear reducer, a turntable reducer, a slewing mechanism, and a slewing drive pair. They all use a slewing bearing as the main support, and the auxiliary drive source uses gears or worms as the active parts to achieve the speed reduction and full-circle rotation function of the reducer type. The composition of the slewing drive mainly includes gears (or worms), slewing bearings, motors, housings, and bases. According to the speed transmission form of the slewing drive, it can be divided into tooth-type slewing drives and worm-wheel slewing drives. These two types of slewing drives can adapt to medium-high speed and low-speed applications respectively. In terms of load-bearing capacity, the worm-wheel type performs better than the tooth type, and when an enveloping worm drive is used, its load-bearing capacity, anti-deformation ability and transmission rigidity are further improved.

[0003] Application number: CN 202321604336.X discloses a large-load anti-overturning inner ring rotary drive with a small space occupation, which includes a housing, a rotating ring is provided for rotation inside the housing, a ball groove is provided on the rotating ring, and cylindrical balls are provided inside the ball groove; a rotating shaft is provided for rotation inside the housing, a worm is fixedly connected to the outside of the rotating shaft, a worm wheel is fixedly connected to the outside of the rotating ring, and the worm wheel is meshed with the worm. The beneficial effect of the utility model is that in actual use, when replacing, the support seat 1 and the support seat 2 can be disassembled from the housing, so that the support seat 1 and the support seat 2 can be replaced without replacing the entire body, thereby reducing the replacement cost.

[0004] The slewing drive device of the above-mentioned comparative document is not easy to disassemble and assemble, lacks a quick locking structure, and the rotating ring has a large friction when rotating, which affects the rotation efficiency. Therefore, a slewing drive device for a hydraulic excavator is designed here to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a slewing drive device for a hydraulic excavator in order to solve the problems that the traditional slewing drive device is difficult to disassemble and assemble, lacks a quick locking structure, and the slewing ring has a large friction force when rotating, thereby affecting the rotation efficiency.

[0006] To achieve the above-mentioned purpose, the technical scheme of the utility model is: a rotary drive device of a hydraulic excavator, comprising a bottom shell and a top cover, a rotating ring is rotatably arranged in the bottom shell, an upper locking ring is arranged above the rotating ring, a lower locking ring is arranged at the bottom of the rotating ring, a lower support seat cooperating with the lower locking ring is movably installed at the bottom of the bottom shell, a plurality of groups of first slots are provided on the inner wall of the lower support seat, a first spring is installed in the first slot, a first ball is installed on the top of the first spring, a lower concave ring cooperating with the first ball is provided on the outer wall of the lower locking ring, an upper support seat cooperating with the upper locking ring is provided at the bottom of the top cover, a plurality of groups of second slots are provided on the inner wall of the upper support seat, a second spring is installed in the second slot, a second ball is installed on the top of the second spring, and an upper concave ring cooperating with the second ball is provided on the outer wall of the upper locking ring; a plurality of groups of locking structures are arranged on the top cover, and a lock hole cooperating with the locking structure is provided on the inner wall of the bottom shell.

[0007] As a further solution of the utility model: the locking structure includes a locking groove opened on the top cover, a locking rod is movably arranged in the locking groove, a locking fan is fixedly arranged at the bottom of the locking rod, and a locking block cooperating with the locking fan is arranged in the lock hole; an adjusting cap is arranged on the top of the locking rod, and a locking spring is also arranged between the adjusting cap and the locking groove.

[0008] As a further solution of the present invention: the locking fan is a cross-shaped structure, and the locking block forms a channel of the locking fan.

[0009] As a further solution of the utility model: a convex ring is arranged at the bottom of the bottom shell, and a rotating groove cooperating with the convex ring is opened at the bottom of the rotating ring.

[0010] As a further solution of the utility model: a plurality of locking holes 15 are provided at the bottom of the bottom shell 1 , threaded holes 14 cooperating with the locking holes 15 are provided at the bottom of the lower support seat 4 , and the threaded holes 14 and the locking holes 15 are movably connected by bolts 16 .

[0011] The utility model provides a rotary drive device for a hydraulic excavator through improvement, which has the following improvements and advantages compared with the prior art:

[0012] The utility model can perform multiple locking on the rotating ring through the cooperation of the lower support seat and the upper locking ring, and the upper support seat and the lower locking ring, and can greatly reduce the friction force when the rotating ring rotates through the cooperation of the first ball and the lower concave ring, and the second ball and the upper concave ring, thereby further improving the rotation efficiency. In addition, the locking structure of the utility model can quickly disassemble and assemble the bottom shell and the top cover according to actual needs, which greatly reduces the practicality and stability of the rotary drive device of the hydraulic excavator. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further explained below in conjunction with the accompanying drawings and embodiments:

[0014] Figure 1 It is a three-dimensional structural diagram of the structure of the utility model;

[0015] Figure 2 It is a cross-sectional view of the utility model;

[0016] Figure 3 The utility model Figure 2 A schematic diagram of the structure enlargement at the center A;

[0017] Figure 4 It is a cross-sectional view of the lower support seat in the utility model;

[0018] Figure 5 It is a bottom view of the utility model;

[0019] Figure 6 It is an enlarged schematic diagram of the structure of the rotating ring in the utility model.

[0020] Description of reference numerals:

[0021] 1. Bottom shell; 2. Top cover; 3. Rotating ring; 4. Lower support seat; 5. Upper support seat; 6. Upper locking ring; 7. Lower locking ring; 8. Rotating groove; 9. Lower concave ring; 10. Upper concave ring; 11. First slot; 12. First spring; 13. First ball; 14. Threaded hole; 15. Locking hole; 16. Bolt; 17. Second slot; 18. Second spring; 19. Second ball; 20. Convex ring; 21. Locking structure; 22. Locking groove; 23. Locking rod; 24. Locking fan; 25. Adjusting cap; 26. Locking spring; 27. Locking hole; 28. Locking block. DETAILED DESCRIPTION

[0022] The following will be combined with the attached Figures 1 to 6The utility model is described in detail, and the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of 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] The utility model provides a rotary drive device for a hydraulic excavator through improvement. Figure 1-Figure 6 As shown, a rotary drive device of a hydraulic excavator comprises a bottom shell 1 and a top cover 2, a rotating ring 3 is rotatably arranged in the bottom shell 1, an upper locking ring 6 is arranged above the rotating ring 3, a lower locking ring 7 is arranged at the bottom of the rotating ring 3, a lower support seat 4 cooperating with the lower locking ring 7 is movably arranged at the bottom of the bottom shell 1, a plurality of groups of first slots 11 are arranged on the inner wall of the lower support seat 4, a first spring 12 is arranged in the first slot 11, a first ball 13 is arranged on the top of the first spring 12, and a lower locking ring 7 is arranged on the outer wall of the lower locking ring 7. A lower concave ring 9 is provided which cooperates with the first ball 13, an upper support seat 5 which cooperates with the upper locking ring 6 is provided at the bottom of the top cover 2, a plurality of second slots 17 are provided on the inner wall of the upper support seat 5, a second spring 18 is installed in the second slot 17, a second ball 19 is installed on the top of the second spring 18, an upper concave ring 10 which cooperates with the second ball 19 is provided on the outer wall of the upper locking ring 6; a plurality of locking structures 21 are provided on the top cover 2, and a lock hole 27 which cooperates with the locking structure 21 is provided on the inner wall of the bottom shell 1.

[0024] The utility model can perform multiple locking on the rotating ring 3 through the cooperation of the lower support seat 4 and the upper locking ring 6, the upper support seat 5 and the lower locking ring 7, and can greatly reduce the friction force of the rotating ring 3 when rotating through the cooperation of the first ball 13 and the lower concave ring 9, the second ball 19 and the upper concave ring 10, thereby further improving the rotation efficiency. And the locking structure 21 of the utility model can quickly disassemble and assemble the bottom shell 1 and the top cover 2 according to actual needs, which greatly reduces the practicality and stability of the rotary drive device of the hydraulic excavator.

[0025] See attached Figure 2 -Attached Figure 3 The locking structure 21 includes a locking groove 22 opened on the top cover 2, a locking rod 23 is movably arranged in the locking groove 22, a locking fan 24 is fixedly arranged at the bottom of the locking rod 23, and a locking block 28 cooperating with the locking fan 24 is arranged in the lock hole 27; an adjusting cap 25 is arranged on the top of the locking rod 23, and a locking spring 26 is also arranged between the adjusting cap 25 and the locking groove 22.

[0026] In this embodiment, in order to facilitate the quick locking of the bottom shell 1, a locking structure 21 is provided on the top cover 2. A locking spring 26 is provided between the adjusting cap 25 and the locking groove 22. Under the action of the locking spring 26, the locking fan 24 is pressed against the inner wall of the top cover 2. When the adjusting cap 25 is rotated downward and pressed, the locking rod 23 and the locking fan 24 move toward the locking hole 27. When the locking fan 24 passes through the locking block 28, and then the adjusting cap 25 is rotated, the locking fan 24 is just at the back of the locking block 28 and is locked under the action of the locking spring 26.

[0027] See attached Figure 2 -Attached Figure 3 The locking fan 24 is a cross-shaped structure, and the locking block 28 forms a channel for the locking fan 24.

[0028] In the present embodiment, in order to quickly lock the bottom shell 1, the locking fan 24 is designed as a cross-shaped structure. After the locking fan 24 passes through the locking block 28, the locking fan 24 is rotated again, and the locking fan 24 is locked to the back of the locking block 28 at this time.

[0029] See attached Figure 2 and attached Figure 6 A convex ring 20 is provided at the bottom of the bottom shell 1, and a rotating groove 8 matching with the convex ring 20 is opened at the bottom of the rotating ring 3.

[0030] In this embodiment, in order to further improve the stability of the rotating ring 3 during rotation, a rotating groove 8 cooperating with the convex ring 20 is opened at the bottom of the rotating ring 3 .

[0031] See attached Figure 4 -Attached Figure 5 The bottom of the bottom shell 1 is provided with a plurality of locking holes 15 , and the bottom of the lower support seat 4 is provided with threaded holes 14 matching with the locking holes 15 , and the threaded holes 14 and the locking holes 15 are movably connected by bolts 16 .

[0032] In this embodiment: in order to improve the stability of the lower support seat 4 and facilitate its quick disassembly and assembly, a threaded hole 14 cooperating with the locking hole 15 is opened at the bottom of the lower support seat 4, and the threaded hole 14 and the locking hole 15 are movably connected by a bolt 16.

[0033] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rotary drive device for a hydraulic excavator, characterized in that: The invention comprises a bottom shell (1) and a top cover (2), wherein a rotating ring (3) is rotatably arranged in the bottom shell (1), an upper locking ring (6) is arranged above the rotating ring (3), a lower locking ring (7) is arranged at the bottom of the rotating ring (3), a lower support seat (4) cooperating with the lower locking ring (7) is also movably arranged at the bottom of the bottom shell (1), a plurality of groups of first slots (11) are arranged on the inner wall of the lower support seat (4), a first spring (12) is arranged in the first slot (11), a first ball (13) is arranged on the top of the first spring (12), and a lower locking ring (6) is arranged on the outer wall of the lower locking ring (7) cooperating with the first ball (13) 3) a lower concave ring (9) cooperating with the upper locking ring (6), the bottom of the top cover (2) is provided with an upper support seat (5) cooperating with the upper locking ring (6), the inner wall of the upper support seat (5) is provided with multiple groups of second slots (17), a second spring (18) is installed in the second slot (17), a second ball (19) is installed on the top of the second spring (18), and an upper concave ring (10) cooperating with the second ball (19) is provided on the outer wall of the upper locking ring (6); multiple groups of locking structures (21) are provided on the top cover (2), and a lock hole (27) cooperating with the locking structure (21) is provided on the inner wall of the bottom shell (1).

2. A rotary drive device for a hydraulic excavator according to claim 1, characterized in that: The locking structure (21) comprises a locking groove (22) provided on the top cover (2), a locking rod (23) being movably arranged in the locking groove (22), a locking fan (24) being fixedly arranged at the bottom of the locking rod (23), and a locking block (28) cooperating with the locking fan (24) being arranged in the locking hole (27); an adjusting cap (25) being arranged at the top of the locking rod (23), and a locking spring (26) being arranged between the adjusting cap (25) and the locking groove (22).

3. A rotary drive device for a hydraulic excavator according to claim 2, characterized in that: The locking fan (24) is a cross-shaped structure, and the locking block (28) forms a channel of the locking fan (24).

4. The rotary drive device for a hydraulic excavator according to claim 1, characterized in that: The bottom of the bottom shell (1) is provided with a convex ring (20), and the bottom of the rotating ring (3) is provided with a rotating groove (8) that matches the convex ring (20).

5. The rotary drive device for a hydraulic excavator according to claim 1, characterized in that: The bottom of the bottom shell (1) is provided with a plurality of locking holes (15), the bottom of the lower support seat (4) is provided with threaded holes (14) matching the locking holes (15), and the threaded holes (14) and the locking holes (15) are movably connected via bolts (16).

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