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CN-224229197-U - Planetary gear box with double-wall type planet carrier structure

CN224229197UCN 224229197 UCN224229197 UCN 224229197UCN-224229197-U

Abstract

The application relates to a planetary gear box with a planet carrier double-wall structure, which comprises a planet carrier assembly, a connecting sleeve arranged on one side of the planet carrier assembly, a bearing seat assembly arranged on the other side of the planet carrier assembly, and a gear ring sleeved on the outer side of the planet carrier assembly, wherein one end of the gear ring is connected with the connecting sleeve, and the other end of the gear ring is connected with the bearing seat assembly. According to the method provided by the embodiment of the application, the gear ring is respectively connected with the connecting sleeve and the bearing seat assembly, so that the overall stability of the gear ring is improved, and the overall meshing rigidity of the epicyclic gear train is effectively improved. Meanwhile, mounting holes are correspondingly formed in the first planet carrier and the second planet carrier respectively, two ends of the pin shaft penetrate into the mounting holes of the first planet carrier and the second planet carrier respectively, the perpendicularity of the pin shaft relative to the first planet carrier and the second planet carrier is effectively improved, the stability of the pin shaft is improved, the reject ratio of a planet carrier assembly is effectively reduced, and the stability requirement under long-term working is met.

Inventors

  • SUN ZHIPENG

Assignees

  • 苏州伟创医疗设备技术有限公司

Dates

Publication Date
20260512
Application Date
20250611

Claims (10)

  1. 1. The planetary gear box with the planet carrier double-wall structure is characterized by comprising a planet carrier assembly, a connecting sleeve arranged on one side of the planet carrier assembly, a bearing seat assembly arranged on the other side of the planet carrier assembly and a gear ring sleeved on the outer side of the planet carrier assembly, wherein one end of the gear ring is connected with the connecting sleeve, and the other end of the gear ring is connected with the bearing seat assembly.
  2. 2. The planetary gearbox with the double-walled structure of the planet carrier according to claim 1, wherein the gear ring is connected with the connecting sleeve in a threaded manner, and the other end of the gear ring is connected with the bearing seat assembly in a threaded manner.
  3. 3. The planetary gear box with the double-walled structure of the planet carrier according to claim 1, wherein the planet carrier assembly comprises a first planet carrier, a second planet carrier and a pin shaft, a plurality of mounting holes are respectively and uniformly formed in the first planet carrier and the second planet carrier corresponding to the pin shaft, one end of the pin shaft penetrates into the mounting hole of the first planet carrier, the other end of the pin shaft penetrates into the mounting hole of the second planet carrier, and two ends of the pin shaft do not exceed the end faces of the first planet carrier and the second planet carrier respectively.
  4. 4. A planetary gearbox with a double-walled structure according to claim 3 wherein the first planet carrier is provided with an output shaft, the output shaft being arranged on a side of the first planet carrier remote from the second planet carrier.
  5. 5. A planetary gearbox with a double-walled planet carrier structure according to claim 3, wherein a plurality of planet wheels are arranged between the first planet carrier and the second planet carrier, the pin shafts pass through holes in the centers of the planet wheels, and the planet wheels are meshed with the gear ring.
  6. 6. A planetary gearbox according to claim 5 characterised in that a sun gear is provided between the first and second planet carriers, the sun gear and planet gears being in mesh respectively.
  7. 7. A planetary gearbox according to claim 4 in which a plurality of sets of said planet carrier assemblies are connected to form a multi-stage planet carrier assembly, the output shaft of the first planet carrier of the upper stage of said planet carrier assemblies being the input to the next stage of planet carrier assemblies.
  8. 8. The planetary gear box with a double-wall structure of a planet carrier as claimed in claim 4, wherein a plurality of bearing seat inner holes are formed in the bearing seat assembly, bearings are respectively embedded in the bearing seat inner holes, and the bearings are respectively sleeved on the output shafts on the first planet carrier.
  9. 9. A planetary gearbox with a double-walled planet carrier according to claim 5 wherein the planet wheels are made of plastic material.
  10. 10. A planetary gearbox according to claim 1, characterised in that the side of the bearing housing assembly remote from the planet carrier assembly is provided with a front end cap which is connected to the bearing housing assembly.

Description

Planetary gear box with double-wall type planet carrier structure Technical Field The application relates to the technical field of power equipment, in particular to a planetary gear box with a planetary carrier double-wall type structure. Background At present, gearboxes with small volume and high rotating speed are increasingly widely applied, such as robots, medical instruments and the like. The gearbox and the miniature motor are combined, and the miniature motor can be used as a prime motor to be applied to various use occasions with strict space requirements. In the prior art, the planet carrier generally adopts a single-wall structure. On one hand, the perpendicularity of the pin shaft on the planet carrier cannot be guaranteed, so that the assembly is difficult, on the other hand, the structure rigidity of the planet carrier is low, elastic deformation is easy to occur in the running process, and the problems of high overall heating value, high noise and the like of the gear box are caused. Disclosure of Invention The application provides a planetary gear box with a double-wall type planetary carrier structure, which aims to solve the technical problem that in the prior art, the perpendicularity of a pin shaft on a planetary carrier is difficult to guarantee, so that the assembly is difficult. In a first aspect, the application provides a planetary gear box with a planetary carrier double-wall structure, which comprises a planetary carrier assembly, a connecting sleeve arranged on one side of the planetary carrier assembly, a bearing seat assembly arranged on the other side of the planetary carrier assembly, and a gear ring sleeved on the outer side of the planetary carrier assembly, wherein one end of the gear ring is connected with the connecting sleeve, and the other end of the gear ring is connected with the bearing seat assembly. Further, the gear ring is connected with the connecting sleeve in a threaded manner, and the other end of the gear ring is connected with the bearing seat assembly in a threaded manner. Further, the planet carrier assembly comprises a first planet carrier, a second planet carrier and a pin shaft, wherein a plurality of mounting holes are respectively and uniformly formed in the first planet carrier and the second planet carrier corresponding to the pin shafts, one end of each pin shaft penetrates into the mounting hole of the first planet carrier, the other end of each pin shaft penetrates into the mounting hole of the second planet carrier, and two ends of each pin shaft do not exceed the end faces of the first planet carrier and the second planet carrier. Further, an output shaft is arranged on the first planet carrier, and the output shaft is arranged on one side, far away from the second planet carrier, of the first planet carrier. Further, a plurality of planet gears are arranged between the first planet carrier and the second planet carrier, the pin shafts penetrate through holes in the centers of the planet gears, and the planet gears are meshed with the gear rings. Further, a sun gear is arranged between the first planet carrier and the second planet carrier, and the sun gear and the planet gears are respectively meshed. Further, the plurality of sets of the planet carrier assemblies are connected to form a multi-stage planet carrier assembly, and an output shaft of a first planet carrier of a previous stage of the planet carrier assemblies serves as an input end of a next stage of the planet carrier assemblies. Further, a plurality of bearing seat inner holes are formed in the bearing seat assembly, bearings are respectively embedded in the bearing seat inner holes, and the bearings are respectively sleeved on the output shafts on the first planet carriers. Further, the planet wheel is made of plastic materials. Further, a front end cover is arranged on one side, far away from the planet carrier assembly, of the bearing seat assembly, and the front end cover is connected with the bearing seat assembly. Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages: The method provided by the embodiment of the application can effectively improve the perpendicularity of the pin shaft in the planet carrier assembly, on one hand, the reject ratio of the planet carrier assembly is greatly reduced, and on the other hand, the integral meshing rigidity of the gear ring is increased, and the performance of the gear box is greatly improved. Drawings The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, an