CN-224201078-U - Heavy-load wheel planetary reducer

CN224201078UCN 224201078 UCN224201078 UCN 224201078UCN-224201078-U

Abstract

The utility model relates to a heavy-load wheel planetary reducer which comprises an input flange, a fixed flange, a connecting flange, a first double-row full roller bearing, a connecting flange, a flange gear ring and a rotary shell, wherein the input flange is connected with the fixed flange, the input shaft is arranged in the fixed flange, the connecting flange is connected with the fixed flange, the first double-row full roller bearing is arranged between the fixed flange and the connecting flange, the flange gear ring and the rotary shell are fixedly connected, a high-speed shaft is arranged on a central shaft in the rotary shell, one end, close to the fixed flange, of the high-speed shaft is in transmission connection with the input shaft, a planetary gear train is arranged on the high-speed shaft, the inner wall of the flange gear ring is provided with the gear ring which is in meshed transmission with the planetary gear train, a second double-row full roller bearing is arranged between the planetary gear train and the rotary shell so that the planetary gear train forms a support under rolling friction, and a plurality of deep groove ball bearings are arranged between the planetary gear train and the input shaft and the high-speed shaft. The utility model has the advantages of effectively improving the radial load bearing capacity, reducing heat and improving the transmission efficiency, and being suitable for the wheel side deceleration requirement under the heavy load working condition.

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 (8)

1. The heavy-load wheel-side planetary reducer comprises an input flange, a fixed flange and an input shaft, wherein the fixed flange is coaxially sleeved on a flange neck of the input flange, the input shaft is arranged on a central axis of a central hole of the fixed flange, the heavy-load wheel-side planetary reducer is characterized by further comprising a connecting flange, a flange gear ring and a rotary shell, the connecting flange is coaxially sleeved on the flange neck of the fixed flange, an inner ring and an outer ring of a first double-row full roller bearing are respectively arranged on the outer wall of the flange neck of the fixed flange and the inner wall of the connecting flange, so that the fixed flange forms a bearing under rolling friction on the connecting flange, the flange gear ring is coaxially sleeved on the flange neck of the connecting flange, the rotary shell is coaxially arranged on the end face, far away from the connecting flange, of the connecting flange, the flange gear ring and the rotary shell are fixedly connected through a first screw, one end, close to the fixed flange, of the high-speed shaft is in transmission connection with the input shaft, a planetary gear train is arranged on the high-speed shaft, the inner wall of the flange gear ring is provided with the planetary gear ring, the planetary gear ring is in meshed transmission with the planetary gear ring, a second double-row full roller bearing is arranged between the planetary gear train and the rotary shell, so that the bearing is formed under rolling friction on the connecting gear train, and the planetary gear train is in a deep ball bearing.
2. A heavy duty wheel side planetary reducer as claimed in claim 1 wherein the input shaft is driven in splined engagement with the high speed shaft; the planetary gear train includes: the high-speed shaft gear ring is arranged at one end, far away from the input shaft, of the high-speed shaft; a high-speed shaft gear ring is arranged on the gear, one end of the high-speed shaft far away from the input shaft, so that the first planet carrier forms a rolling friction bearing for the rotary shell through the second double-row full roller bearing.
3. The heavy-duty wheel-side planetary reducer according to claim 2, further comprising a fourth deep groove ball bearing arranged in a gap between the high-speed shaft gear ring and the second sun gear, wherein an inner ring of the fourth deep groove ball bearing is sleeved on the high-speed shaft, two side end surfaces of the inner ring are respectively abutted against the high-speed shaft gear ring and the second sun gear, and an outer ring of the fourth deep groove ball bearing is arranged on the inner wall of the third planet carrier so that the high-speed shaft forms rolling friction support for the third planet carrier through the fourth deep groove ball bearing; the first deep groove ball bearing is arranged between the input shaft and the fixed flange, the second deep groove ball bearing is arranged between the fixed flange and the first sun gear, the flange neck inner wall of the fixed flange and one end of the first sun gear close to the fixed flange are provided with oppositely arranged step mechanisms, the inner ring and the outer ring of the second deep groove ball bearing are respectively arranged in the step structure of the first sun gear and the step structure of the fixed flange, so that the fixed flange forms a rolling friction support for the first sun gear, the first deep groove ball bearing is arranged between the input shaft and the fixed flange, the first deep groove ball bearing and the outer ring of the first deep groove ball bearing are respectively arranged on the inner ring and the inner wall of the fixed flange, so that the fixing flange forms a rolling friction bearing for the input shaft.
4. The heavy duty wheel side planetary reducer of claim 1, further comprising a first rotary lip seal disposed on an end face of the first double row full roller bearing adjacent to the fixed flange and disposed between the connecting flange and the fixed flange, an inner seal ring of the first rotary lip seal disposed on an outer wall of the flange neck of the fixed flange, an outer seal ring of the first rotary lip seal disposed on an inner wall of the connecting flange, a second rotary lip seal disposed on an end face of the input shaft adjacent to the input flange and disposed between the input flange and the fixed flange, an inner seal ring of the second rotary lip seal disposed on an outer wall of the input shaft, and an outer seal ring of the second rotary lip seal disposed on an inner wall of the flange neck of the input flange.
5. The heavy-duty wheel-side planetary reducer according to claim 1, wherein an annular protruding structure is arranged on the inner wall of the end face of the rotary shell, which is close to one side of the high-speed shaft, and the diameter of an inner hole of the annular protruding structure is larger than that of the high-speed shaft.
6. The heavy-duty wheel-side planetary reducer according to claim 1 or 5, wherein the rotary housing has a detachable structure, and comprises a rotary housing body and an end cover, the end surface of the rotary housing, which is far away from the fixed flange, has an open structure, the end surface of one side of the rotary housing, which is close to the high-speed shaft, has an end cover, and the end cover is fixedly arranged at the open structure through screws to realize compression sealing.
7. A heavy duty wheel side planetary reducer as claimed in claim 2, characterized in that the inner wall of the rotary housing is provided with a number of gear rings, which are in engagement with the gear rings of the second and third planetary gears.
8. The heavy-duty wheel-side planetary reducer according to claim 1, wherein a piston is arranged between the fixed flange and the input flange, two ends of the piston are respectively provided with a belleville spring abutted against the input flange and a friction plate abutted against the fixed flange, a piston oil cavity is arranged between the piston and the fixed flange, the input flange and the fixed flange are provided with a pressure oil circuit, the pressure oil circuit is communicated with the piston oil cavity of the piston and used for injecting pressure oil to drive the piston to move, and the friction plates comprise a friction static plate arranged on the fixed flange and a friction dynamic plate fixedly arranged on the input shaft.

Description

Heavy-load wheel planetary reducer Technical Field The utility model relates to the technical field of planetary reducers, in particular to a heavy-load wheel-side planetary reducer. Background Wheel reducers are important transmission components, and in practical applications, the wheel reducers are usually required to bear large radial loads. At present, the rotating support of the hub reduction gear mostly adopts a double tapered roller bearing cantilever support structure, but because the axial layout size of the two bearings is shorter, the radial load bearing capacity of the hub reduction gear is limited, and the requirement of a large radial load working condition is difficult to meet. In addition, the axial fixation of the sun gear in the existing hub reduction gear usually adopts an end surface fixation mode, the circular motion of the sun gear is realized by sliding friction, and the structure is easy to generate more heat and has lower transmission efficiency. Meanwhile, the hub reduction gear needs to be started and stopped frequently in actual use and is subjected to severe impact load, and the arrangement mode of the traditional planet gears is insufficient in reliability when coping with the impact, so that there is room for improvement. Therefore, there is a need to design a hub reduction gear that reduces frictional heating, resists shock loads, and changes the conventional planet arrangement. Disclosure of utility model The utility model aims to overcome the defects of the prior art and provide a heavy-load wheel-side planetary reducer which is used for reducing friction heat generation and impact load and changing the arrangement mode of the traditional planetary gears. The heavy-load wheel-side planetary reducer comprises an input flange, a fixed flange and an input shaft, wherein the fixed flange is coaxially sleeved on a flange neck of the input flange, the input shaft is arranged on a central axis of a central hole of the fixed flange, the heavy-load wheel-side planetary reducer further comprises a connecting flange, a flange gear ring and a rotary shell, the connecting flange is coaxially sleeved on the flange neck of the fixed flange, an inner ring and an outer ring of a first double-row full roller bearing are respectively arranged on the outer wall of the flange neck of the fixed flange and the inner wall of the connecting flange so that the fixed flange forms a support under rolling friction to the connecting flange, the flange gear ring is coaxially sleeved on the flange neck of the connecting flange, the rotary shell is coaxially arranged on the end face, away from the connecting flange, of the flange gear ring, the connecting flange gear ring and the rotary shell are fixedly connected through a first screw, a high-speed shaft is arranged on a central shaft in the rotary shell, one end, close to the fixed flange, of the high-speed shaft is in transmission connection with the input shaft, the inner wall of the flange gear ring is provided with a planetary gear, a second double-row full roller bearing is arranged between the planetary gear train and the rotary shell so that the inner wall of the planetary gear ring forms a support under rolling friction to the connecting gear train, and the planetary gear train is in a deep groove for supporting the planetary gear. Preferably, the utility model further comprises that the input shaft and the high-speed shaft are driven by spline fit; the planetary gear train includes: the high-speed shaft gear ring is arranged at one end, far away from the input shaft, of the high-speed shaft; a high-speed shaft gear ring is arranged on the gear, one end of the high-speed shaft far away from the input shaft. The inner ring of the fourth deep groove ball bearing is sleeved on the high-speed shaft, the two side end surfaces of the inner ring are respectively abutted against the high-speed shaft gear ring and the second sun gear, and the outer ring of the fourth deep groove ball bearing is arranged on the inner wall of the third planet carrier, so that the high-speed shaft forms a rolling friction support for the third planet carrier through the fourth deep groove ball bearing; the inner ring of the third deep groove ball bearing is clamped in the step structure of the second sun wheel, the end faces of the two sides of the inner ring of the third deep groove ball bearing are respectively abutted against the second sun wheel and the first sun wheel, and the outer ring of the third deep groove ball bearing is arranged on the inner wall of the second planet carrier so that the second sun wheel forms a rolling friction support for the second planet carrier; the first deep groove ball bearing is arranged between the input shaft and the fixed flange, and the inner ring and the outer ring of the first deep groove ball bearing are respectively arranged on the outer wall of the input shaft and the inner wall of the fixed flange so as to enable the fixed flan