Reinforced base assembly for rotary speed reducer

Abstract

The utility model relates to the technical field of rotary speed reducers, and particularly discloses a reinforced base assembly for a rotary speed reducer, the input end of the base assembly is in transmission connection with the output end of the rotary speed reducer, and the output end of the base assembly is in transmission connection with an inner toothed rail; the base assembly comprises a shell, a plurality of driving shafts are arranged on the shell in an annular array mode, the driving shafts are vertically arranged and penetrate through the shell, and first gears and second gears are arranged at the upper ends and the lower ends of the driving shafts correspondingly. The first gears are in transmission connection with the output end of the rotary speed reducer, a driving pipe is coaxially and rotatably arranged at the lower end of the shell, an inner gear ring is coaxially arranged in an inner cavity of the driving pipe, and the second gears are meshed with the inner gear ring; the driving pipe is sleeved with a driving gear, and the driving gear is meshed with the inner toothed rail. The rotary speed reducer base solves the problems that due to the fact that structural strength of a traditional rotary speed reducer base is not easy enough, teeth and shafts of a gear shaft are broken, and a large bearing falls apart.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary reducers, and in particular to a reinforced base assembly for a rotary reducer. Background Art

[0002] The excavator's rotation system primarily consists of a slewing bearing, a slewing motor, a slewing reducer, and a slewing brake. The slewing bearing is a crucial component connecting the upper and lower bodies, capable of withstanding the excavator's enormous torque during operation. The slewing motor is a key component that generates power to rotate the equipment, converting hydraulic energy into mechanical energy through a hydraulic drive mechanism. The slewing reducer primarily decelerates and amplifies the high-speed rotational torque output by the motor to drive the slewing bearing. Specifically, an internal rack is provided on the lower body, and the slewing reducer is mounted on the upper body via a base. A gear shaft is rotatably mounted on the base. The upper end of the gear shaft is in transmission connection with the output end of the slewing reducer, and the lower end of the gear shaft is provided with a gear that meshes with the internal rack. This gear drives the gear to move within the internal rack, thereby driving the upper body to rotate on the lower body.

[0003] Excavator slewing reducers are a frequently used component of the excavator's rotary working mechanism. As core components, slewing reducers are crucial to the excavator's lifespan. As excavator size increases, the torque the gear shaft must handle increases. This increased torque increases the risk of gear shaft wear and breakage. Furthermore, the large bearings in the base are prone to wear and tear, leading to a high rate of reducer failure. Consequently, improvements to the slewing reducer base are needed to address these issues, including gear shaft breakage, shaft breakage, and large bearing breakage, thereby extending the reducer's lifespan. Utility Model Content

[0004] The purpose of the utility model is to provide a reinforced base assembly for a rotary reducer, which solves the problems of the traditional rotary reducer base which is easy to cause gear shaft tooth breakage, shaft breakage and large bearing disassembly due to insufficient structural strength.

[0005] The utility model is realized by the following technical solutions: a reinforced base assembly for a rotary reducer, the input end of the base assembly is transmission-connected to the output end of the rotary reducer, and the output end of the base assembly is transmission-connected to the internal gear rail;

[0006] The base assembly includes a housing, a plurality of drive shafts are arranged in a circular array on the housing, the drive shafts are vertically arranged and pass through the housing, and a first gear and a second gear are respectively provided at the upper and lower ends of the drive shafts;

[0007] The first gears are in driving connection with the output end of the rotary reducer, a driving tube is coaxially provided at the lower end of the housing, an inner gear ring is coaxially provided in the inner cavity of the driving tube, and the second gears are meshed with the inner gear ring;

[0008] A driving gear is sleeved on the driving tube, and the driving gear is meshed with the inner rack.

[0009] Furthermore, a gear shaft is coaxially provided on the housing, and the upper end of the gear shaft is transmission-connected to the output end of the rotary reducer via a sun gear;

[0010] A first driving gear is sleeved on the gear shaft, and the first driving gear is engaged with a plurality of the first gears.

[0011] Furthermore, the gear shaft passes through the housing, and a second driving gear is sleeved on the gear shaft, and the second driving gear is meshed with a plurality of the second gears.

[0012] Furthermore, a mounting seat is provided at the bottom of the housing, a mounting cavity is defined in the mounting seat, a cover is provided at the opening of the mounting cavity, and a through hole is provided on the cover;

[0013] The driving tube is integrally provided with a raised truncated cone, which is placed in the mounting cavity. The driving tube extends out of the sealing cover through the through hole, and the driving tube is loosely fitted in the through hole.

[0014] Furthermore, the driving tube is provided with a first bearing and a second bearing, and the first bearing and the second bearing are respectively located at the upper and lower ends of the truncated table.

[0015] Furthermore, a first mounting flange is provided at the upper end of the shell.

[0016] Furthermore, a second mounting flange is provided at the lower end of the shell.

[0017] The technical solution of the utility model has at least the following advantages and beneficial effects:

[0018] The reinforced base assembly for this slewing reducer has a compact overall structure and high reliability. It disperses low-speed high torque to multiple drive shafts and then converges them on larger and stronger drive tubes and drive gears. The larger the drive gear, the more teeth mesh with the internal rack, making it less likely to cause problems such as broken teeth, broken shafts, and large bearings falling apart. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a front view of the structure of a reinforced base assembly for a rotary reducer provided by the utility model;

[0021] Figure 2 A top view of the structure of a reinforced base assembly for a rotary reducer provided by the utility model;

[0022] Figure 3 A bottom view of the structure of a reinforced base assembly for a rotary reducer provided by the utility model;

[0023] Figure 4 for Figure 1 Schematic diagram of the structure of the cross section at AA;

[0024] Icons: 1. Housing, 2. Drive shaft, 21. First gear, 22. Second gear, 3. Drive tube, 31. Internal ring gear, 32. Drive gear, 33. Cone, 4. Gear shaft, 41. First driving gear, 42. Second driving gear, 5. Mounting seat, 51. Mounting cavity, 52. Cover, 521, Through hole, 53. First bearing, 54. Second bearing, 6. First mounting flange, 7. Second mounting flange. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0027] Reference Figures 1 to 4 As shown, this embodiment provides a reinforced base assembly for a rotary reducer, which is arranged on the upper body of the excavator. The input end of the base assembly is transmission-connected to the output end of the rotary reducer, and the output end of the base assembly is transmission-connected to the internal rack on the lower body.

[0028] like Figure 1-3As shown, the base assembly includes a shell 1, and a plurality of drive shafts 2 are arranged in a ring array on the shell 1. The drive shaft 2 is vertically arranged and passes through the shell 1. The drive shaft 2 is rotatably connected to the shell 1 through two spherical roller bearings. A skeleton oil seal is provided on the drive shaft 2 between the two spherical roller bearings. The skeleton oil seal prevents the lubricating oil in the rotary reducer from leaking from the drive shaft 2 and the shell 1. The upper and lower ends of the drive shaft 2 are respectively provided with a first gear 21 and a second gear 22.

[0029] More specifically, Figure 1-4 As shown, several first gears 21 are transmission-connected to the output end of the rotary reducer, a driving tube 3 is coaxially provided at the lower end of the housing 1, an inner gear ring 31 is coaxially provided in the inner cavity of the driving tube 3, and several second gears 22 are meshed with the inner gear ring 31; a driving gear 32 is sleeved on the driving tube 3, and the driving gear 32 is meshed with the inner rack.

[0030] During specific implementation, the output end of the rotary reducer drives multiple drive shafts 2 to rotate respectively, and the lower end of the drive shaft 2 is connected to the drive tube 3 through the second gear 22, thereby driving the drive tube 3 to rotate, and then connected to the internal rack through the drive gear 32 on the drive tube 3, and then the upper body is driven to rotate on the lower body by rolling the drive gear 32 on the internal rack. The torque is transmitted by multiple drive shafts 2, which can enhance the total value of the torque transmitted by the entire base assembly. Compared with the torque transmission capacity of the traditional single drive shaft, there is a huge improvement, thereby avoiding problems such as broken teeth, broken shafts and large bearing disintegration.

[0031] More specifically, Figure 1-4 As shown, a gear shaft 4 is coaxially provided on the housing 1, and the upper end of the gear shaft 4 is transmission-connected to the output end of the rotary reducer through the sun gear; at the same time, a first driving gear 41 is sleeved on the gear shaft 4, and the first driving gear 41 is engaged with the plurality of first gears 21; the gear shaft 4 passes through the housing 1, and a second driving gear 42 is further sleeved on the gear shaft 4, and the second driving gear 42 is engaged with the plurality of second gears 22.

[0032] In specific implementation, the slewing reducer is mainly a multi-stage planetary reduction mechanism, the end of which is connected to the sun gear transmission, and then drives the gear shaft 4 to rotate through the sun gear. The gear shaft 4 drives several drive shafts 2 around it to rotate through the first driving gear 41 and the second driving gear 42, and finally drives the drive tube 3 and the drive gear 32 to rotate. The overall structure is compact and reliable. The low-speed high torque is dispersed to multiple drive shafts 2, and then converged to the larger and stronger drive tube 3 and drive gear 32. The larger the drive gear 32, the more teeth meshing with the internal rack, and it is less likely to cause problems such as broken teeth, broken shafts, and large bearings falling apart.

[0033] More specifically, Figure 1 、 3As shown in Figure 4, a mounting seat 5 is provided at the bottom of the housing 1, and a mounting cavity 51 is opened in the mounting seat 5. A cover 52 is provided at the cavity opening of the mounting cavity 51, and a through hole 521 is provided on the cover 52; a raised frustum 33 is integrally provided on the driving tube 3, and the frustum 33 is placed in the mounting cavity 51. The driving tube 3 extends out of the cover 52 through the through hole 521, and the driving tube 3 is clearance-matched with the through hole 521.

[0034] In specific implementation, the driving tube 3 is provided with a first bearing 53 and a second bearing 54, and the first bearing 53 and the second bearing 54 are respectively located at the upper and lower ends of the truncated cone 33, thereby ensuring the stability of the driving tube 3 in its rotation under the outer shell 1, thereby providing a stable operating basis for the rotation of the driving gear 32.

[0035] At the same time, if Figure 1-3 As shown, a first mounting flange 6 is provided at the upper end of the housing 1, which is connected to the rotary reducer through the first mounting flange 6, and a second mounting flange 7 is provided at the lower end of the housing 1, which is used to mount the housing 1 on the upper vehicle body.

[0036] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A reinforced base assembly for a rotary reducer, wherein the input end of the base assembly is drivingly connected to the output end of the rotary reducer, and the output end of the base assembly is drivingly connected to an internal rack; Its characteristics are: The base assembly comprises a housing (1), a plurality of drive shafts (2) are arranged in a circular array on the housing (1), the drive shafts (2) are arranged vertically and pass through the housing (1), and a first gear (21) and a second gear (22) are respectively arranged at the upper and lower ends of the drive shafts (2); A plurality of the first gears (21) are in transmission connection with the output end of the rotary reducer; a drive tube (3) is coaxially provided at the lower end of the housing (1); an inner gear ring (31) is coaxially provided in the inner cavity of the drive tube (3); and a plurality of the second gears (22) are meshed with the inner gear ring (31); The driving tube (3) is sleeved with a driving gear (32), and the driving gear (32) is meshed with the internal gear rail.

2. The reinforced base assembly for a rotary reducer according to claim 1, characterized in that: A gear shaft (4) is coaxially arranged on the housing (1), and the upper end of the gear shaft (4) is transmission-connected to the output end of the rotary reducer via a sun gear; A first driving gear (41) is sleeved on the gear shaft (4), and the first driving gear (41) is meshed with a plurality of the first gears (21).

3. The reinforced base assembly for a rotary reducer according to claim 2, characterized in that: The gear shaft (4) passes through the housing (1), and a second driving gear (42) is sleeved on the gear shaft (4). The second driving gear (42) is meshed with a plurality of the second gears (22).

4. A reinforced base assembly for a rotary reducer according to any one of claims 1 to 3, characterized in that: A mounting seat (5) is provided at the bottom of the housing (1), a mounting cavity (51) is provided in the mounting seat (5), a cover (52) is provided at the opening of the mounting cavity (51), and a through hole (521) is provided on the cover (52); A raised truncated cone (33) is integrally provided on the driving tube (3), and the truncated cone (33) is placed in the mounting cavity (51). The driving tube (3) extends out of the sealing cover (52) through the through hole (521), and the driving tube (3) is clearance-matched with the through hole (521).

5. The reinforced base assembly for a rotary reducer according to claim 4, characterized in that: The driving tube (3) is sleeved with a first bearing (53) and a second bearing (54), and the first bearing (53) and the second bearing (54) are respectively located at the upper and lower ends of the truncated table (33).

6. The reinforced base assembly for a rotary reducer according to claim 5, characterized in that: A first mounting flange (6) is provided at the upper end of the housing (1).

7. The reinforced base assembly for a rotary reducer according to claim 6, characterized in that: A second mounting flange (7) is provided at the lower end of the housing (1).

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