CN-224201079-U - Heavy load rotary speed reducer

Abstract

The utility model relates to the technical field of planetary reducers, in particular to a heavy-load rotary reducer, wherein a first groove is formed in the top of an upper shell and adjacent to a hole, a full roller bearing is arranged in the first groove, a first sealing ring is arranged at the top of the full roller bearing, a first lubrication channel is further formed in the upper shell and communicated with the bottom area of the full roller bearing, a second sealing ring is arranged at the bottom of the communicated part, the first sealing ring, the full roller bearing, the second sealing ring and the first lubrication channel jointly form an independent first lubrication cavity, a second groove is formed in the bottom of the upper shell and adjacent to the hole, a cylindrical roller bearing is arranged in the second groove, and ventilation caps and oil windows are arranged on the upper shell and the lower shell, so that independent second lubrication cavities are formed by the upper shell and the lower shell and used for accommodating lubricating oil and realizing self-splash lubrication. The utility model has the advantages of improving the lubrication reliability, enhancing the shock resistance, strengthening the sealing and preventing dust.

Inventors

• LI KAIWEI
• WU CHENXIA

Assignees

• 上海合纵重工机械有限公司

Dates

Publication Date

20260505

Application Date

20250620

Claims (5)

1. 1. The utility model provides a heavy load gyration reduction gear, including last casing (19) and lower casing (20), be equipped with multistage planetary gear system in the cavity that goes up casing (19) and lower casing (20) enclose, input shaft (10) pass lower casing (20) and are connected with multistage planetary gear system's high-speed sun gear (12), output shaft (18) pass last casing (19) one end and are connected with multistage planetary gear system's low-speed planet carrier (16), output shaft (18) other end are equipped with output gear, its characterized in that: the upper shell (19) is provided with a hole for the output shaft (18) to pass through; A first groove (26) is formed in the top of the upper shell (19) adjacent to the hole, a full roller bearing (2) is arranged in the first groove (26), a first sealing ring (1) is arranged at the top of the full roller bearing (2), a first lubricating channel (21) is further formed in the upper shell (19), the first lubricating channel (21) is communicated with the bottom area of the full roller bearing (2), a second sealing ring (4) is arranged at the bottom of the communicated position, the first sealing ring (1), the full roller bearing (2), the second sealing ring (4) and the first lubricating channel (21) form an independent first lubricating cavity (25), and an oil filling nozzle (17) and a pressure ventilation cap (3) which are communicated with the first lubricating channel (21) are arranged on the upper shell (19) and are used for filling lubricating grease and discharging air into the first lubricating cavity (25); A second groove (27) is formed in the bottom of the upper shell (19) adjacent to the hole, and a cylindrical roller bearing (7) is arranged in the second groove (27); The upper shell (19) and the lower shell (20) are provided with the ventilation cap (5) and the oil window (6), so that a cavity enclosed by the upper shell (19) and the lower shell (20) forms an independent second lubrication cavity (28) for accommodating lubricating oil and realizing self-splash lubrication.
2. 2. A heavy-duty slewing reducer as claimed in claim 1, characterized in that the top of the upper housing (19) is provided with a connecting flange (22), the connecting flange (22) pressing against the full roller bearing (2) and the first sealing ring (1).
3. 3. A heavy-duty slewing reducer as claimed in claim 1, characterized in that the outside of the upper housing (19) is provided with a filler neck (17) and a plenum cap (3) communicating with the first lubrication channel (21).
4. 4. A heavy load slewing reducer as claimed in claim 1, characterized in that the outer edge of the junction of the low-speed planet carrier (16) and the output shaft (18) is provided with a protruding structure (23), said protruding structure (23) being adapted to support the bottom of the inner ring of the cylindrical roller bearing (7).
5. 5. A heavy-duty slewing reducer as claimed in claim 1, characterized in that the multi-stage planetary gear system comprises a high-speed sun gear (12), a high-speed planet carrier (13), a low-speed sun gear (15) and a low-speed planet carrier (16), the high-speed planet gear (24) is supported by a cylindrical roller bearing (7), the low-speed planet gear (8) is supported by a full needle roller (14), and the high-speed sun gear (12), the low-speed sun gear (15), the high-speed planet carrier (13) and the low-speed planet carrier (16) all adopt floating structures to realize uniform load.

Description

Heavy load rotary speed reducer Technical Field The utility model relates to the technical field of planetary reducers, in particular to a heavy-load rotary reducer. Background The rotary speed reducer is widely applied to heavy load scenes such as engineering machinery, mining equipment and the like, and has the core function of transmitting the power of a hydraulic motor to a rotary support through a gear system and driving equipment to rotate. In the prior art, the speed reducer needs to meet severe working conditions such as instantaneous impact load, high-frequency positive and negative rotation, continuous lubrication and the like. However, conventional designs have drawbacks. When the uniform load design of the planet wheel is imperfect, the uneven load distribution can aggravate the local abrasion and reduce the service life of the equipment. Single lubrication modes such as oil bath lubrication cannot meet the differential requirements. The high-speed end planet wheel needs to adapt to high rotation speed, the low-speed end needs to cope with impact load, partition lubrication is difficult to realize in the traditional design, and the full roller bearing is easy to mix with gear box lubricating oil due to insufficient sealing isolation, so that lubricating grease is diluted or polluted, and the lubricating effect is influenced. The gear and output shaft split design weakens the meshing rigidity, is easy to generate vibration and noise under impact load, reduces transmission precision, and increases fault risk. Therefore, there is a need for a swing reducer design that can simultaneously optimize impact resistance, lubrication reliability, and structural rigidity. Disclosure of utility model The utility model aims to overcome the defects of the prior art and provide a heavy-load rotary speed reducer which is used for synchronously optimizing impact resistance, lubrication reliability and structural rigidity. The heavy-load rotary speed reducer comprises an upper shell and a lower shell, a multistage planetary gear system is arranged in a cavity surrounded by the upper shell and the lower shell, an input shaft penetrates through the lower shell to be connected with a high-speed sun gear of the multistage planetary gear system, an output shaft penetrates through one end of the upper shell to be connected with a low-speed planet carrier of the multistage planetary gear system, an output gear is arranged at the other end of the output shaft, a hole for the output shaft to penetrate through is formed in the upper shell, a first groove is formed in the top of the upper shell and adjacent to the hole, a full roller bearing is mounted in the first groove, a first sealing ring is arranged at the top of the full roller bearing, a first lubricating channel is further formed in the upper shell and communicated with the bottom area of the full roller bearing, a second sealing ring is arranged at the bottom of the communicating position, the first sealing ring, the full roller bearing, the second sealing ring and the first lubricating channel jointly form an independent first lubricating cavity, a nozzle and a pressure oil filling cap which are communicated with the first lubricating channel are arranged on the upper shell, a first lubricating cavity is filled with the first lubricating cavity, a second lubricating cavity is formed adjacent to the upper shell and the second lubricating cavity, a cylindrical oil is filled with the second lubricating cavity is formed in the upper shell and adjacent to the bottom of the first lubricating cavity, and the cylindrical cavity is formed by the second lubricating cavity, and the cylindrical cavity is formed in the upper cavity and the bottom is filled with the hollow cavity. Preferably, the utility model further comprises a connecting flange arranged at the top of the upper shell, and the connecting flange compresses the full roller bearing and the first sealing ring. Preferably, the utility model further comprises a oiling nozzle and a pressure ventilation cap which are arranged on the outer side of the upper shell and communicated with the first lubrication channel. Preferably, the utility model further comprises a protruding structure arranged on the outer edge of the joint of the low-speed planet carrier and the output shaft, wherein the protruding structure is used for supporting the bottom of the inner ring of the cylindrical roller bearing. Preferably, the multistage planetary gear system further comprises a high-speed sun gear, a high-speed planet carrier, a low-speed sun gear and a low-speed planet carrier, wherein the high-speed planet gear is supported by a cylindrical roller bearing, the low-speed planet gear is supported by a full needle roller, and the high-speed sun gear, the low-speed sun gear, the high-speed planet carrier and the low-speed planet carrier all adopt floating structures so as to realize uniform load. Compared with the prior art, the utility