CN219159445U - Planetary gear reducer device - Google Patents

Abstract

The utility model provides a planetary gear reducer device. The planetary gear reducer device includes: a case; a planetary reduction mechanism arranged in the box body; and the shaft and bearing combination is connected with the planetary reduction mechanism and extends out of the box body. According to the scheme, the high-rotation-speed power input by the motor can be output into low-rotation-speed high-torque power through rotation of the planetary gear, coaxiality of the intermediate shaft after installation can be ensured, disassembly and assembly operations can be simplified, and performance of the speed reducer assembly can be ensured.

Description

Planetary gear reducer device

Technical Field

The present utility model relates to a speed reducer, and more particularly, to a planetary gear speed reducer.

Background

The speed reducer device is widely applied to mechanical equipment at present and comprises a gear speed reducer, a worm gear speed reducer and other main types, wherein the planetary gear speed reducer is one of the main types. Planetary gear reducers are generally used for low-speed and high-torque transmission equipment, and mainly output electric motors or other high-speed running power into low-speed and high-torque power. The main principle is that the pinion drives the large gear, and the gear ratio of the large gear and the small gear is the transmission ratio. The existing planetary gear reducer has the defects of multiple parts, little variability and no wide adaptability.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide the planetary gear reducer device, which can output high-rotation-speed power input by a motor into low-rotation-speed and high-torque power through rotation of a planetary gear, can ensure coaxiality of a countershaft shaft system after installation, can simplify disassembly and assembly operations, and can ensure performance of a reducer assembly.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

an embodiment of the present utility model provides a planetary gear reducer device including:

a case;

a planetary reduction mechanism arranged in the box body;

a shaft and bearing assembly connected with the planetary reduction mechanism and extending out of the box body;

the box body is internally provided with two communicated cavities, the shaft and bearing combination is arranged in the first cavity, and the shaft and bearing combination extends out of the first cavity from a first opening on the box body;

the planetary reduction mechanism is arranged in the second cavity, the second cavity is communicated with the outside through a second mounting opening, and an annular gear is fixed on the inner wall of the second cavity;

the planetary reduction mechanism comprises a built-in planetary reduction mechanism and a matched planetary reduction mechanism;

wherein, supporting planetary reduction gears includes:

a mating sun gear coaxial with and extending out of the second mounting opening;

a first, second and third mating planet gears surrounding and meshed with the mating sun gear;

the matched planet carrier is connected with the first matched planet gear, the second matched planet gear and the third matched planet gear;

wherein, the first matched planetary shaft, the second matched planetary shaft and the third matched planetary shaft which are respectively corresponding to the three planetary gears of the matched planetary reduction mechanism are arranged on the matched planetary carrier;

the first matched planetary shaft, the second matched planetary shaft and the third matched planetary shaft are fixedly connected with the corresponding planetary gears through needle bearings;

the first matched planetary shaft, the second matched planetary shaft and the third matched planetary shaft are fixed on the matched planetary frame in an interference fit mode;

wherein, the center of the matched planet carrier is also provided with a mounting hole, and the mounting hole is connected with the built-in planetary reduction mechanism;

wherein, built-in planetary reduction mechanism includes:

a built-in sun gear connected with the mounting hole of the matched planet carrier through a check ring;

a first built-in planetary gear, a second built-in planetary gear and a third built-in planetary gear which surround the built-in sun gear and are meshed with the built-in sun gear;

and the built-in planet carrier is connected with the first built-in planet gear, the second built-in planet gear and the third built-in planet gear.

Optionally, the first opening is coaxial with the second mounting opening, and the speed reducer is in butt joint with an external motor through the second mounting opening.

Optionally, the built-in planet carrier is provided with a first built-in planet shaft, a second built-in planet shaft and a third built-in planet shaft which are respectively corresponding to the planet gears of the built-in planet mechanism;

the first built-in planetary shaft, the second built-in planetary shaft and the third built-in planetary shaft are fixedly connected with the corresponding planetary gears through needle bearings;

the first, second and third inner planet shafts are fixed to the inner planet carrier by interference fit.

Optionally, the shaft and bearing combination includes:

an output shaft friction welded with the center of the built-in planet carrier;

the rolling bearing is arranged at the first opening and is arranged on the inner wall of the box body;

and a framework oil seal positioned outside the rolling bearing and fixed on the inner wall of the box body.

The scheme of the utility model at least comprises the following beneficial effects:

the planetary gear reducer device according to the above aspect of the present utility model includes: a case; a planetary reduction mechanism arranged in the box body; a shaft and bearing assembly connected with the planetary reduction mechanism and extending out of the box body; the planetary reduction mechanism rotates, and the input high-rotation-speed force is output as low-rotation-speed high-torque force; the planetary reduction mechanism has different combination modes and can be widely applied to the actual use process.

Drawings

FIG. 1 is a cross-sectional view of a planetary gear reducer apparatus provided by an embodiment of the present utility model;

fig. 2 is a perspective view of a planetary gear reducer device provided by an embodiment of the present utility model;

FIG. 3 is a right side view of a planetary gear reducer arrangement provided by an embodiment of the utility model;

fig. 4 is a schematic view of a planet carrier of a planetary gear reducer device provided by an embodiment of the present utility model.

Reference numerals illustrate:

1. a case; 11. a first opening; 12. a second mounting opening; 13. an inner gear ring; 211. a mating sun gear; 2121. a first mating planetary gear; 2122. a second mating planetary gear; 2123. a third mating planetary gear; 213. a matched planet carrier; 2131. a first mating planetary shaft; 2132. a second mating planetary shaft; 2133. a third mating planetary shaft; 2134. a mounting hole; 221. a built-in sun gear; 2221. a first built-in planetary gear; 2222. a second built-in planetary gear; 223. a planet carrier is arranged in the planet carrier; 2232. a second built-in planetary shaft; 31. an output shaft; 32. a rolling bearing; 33. and (5) a framework oil seal.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

As shown in fig. 1 and 2, an embodiment of the present utility model proposes a planetary gear reducer device including:

a case 1;

a planetary reduction mechanism arranged in the box body 1;

a shaft and bearing assembly connected with the planetary reduction mechanism and extending out of the box body;

in the embodiment of the utility model, the planetary reduction mechanism is a main body for realizing reduction of the rotating speed, and the low-rotating-speed and high-torque force is output through the shaft and bearing combination; the speed reducing performance of the speed reducer can be applied to products such as a stirrer and the like;

the embodiment of the utility model can ensure the coaxiality of the speed reducer device and the motor shaft, has excellent performance and low energy consumption, and has the speed reducer efficiency of more than 95 percent; the manufacturing is combined with the standard technical requirements, so that the space is saved, and the device is reliable and durable; the serial and modularized design is adopted, so that the method has wider adaptability.

As shown in fig. 1, in an alternative embodiment of the present utility model, the housing 1 includes two communicating cavities, and the shaft and bearing assembly is installed in the first cavity, and the shaft and bearing assembly extends out of the first cavity from the first opening 11 on the housing 1;

the planetary reduction mechanism is arranged in a second cavity, the second cavity is communicated with the outside through a second mounting opening 12, and an inner gear ring 13 is fixed on the inner wall of the second cavity; the inner gear ring 13 is made of structural steel, is installed in the box body 1 in an interference fit mode after heat treatment, and is matched with the planetary reduction mechanism for use, so that the effect of reducing the rotating speed again is achieved;

the box body 1 bears acting force from an external motor and counter force generated when the planetary reduction mechanism rotates, adopts a cast iron box form, has enough rigidity, can bear the action of force and moment, prevents deformation and ensures transmission quality; the cast iron box has the characteristics of good vibration damping performance and easy cutting processing; the box body 1 is in a form conforming to the rule of power transmission and is convenient to check and maintain.

In an alternative embodiment of the present utility model, the first opening 11 is coaxial with the second mounting opening 12, and the speed reducer is in butt joint with an external motor through the second mounting opening 12; in the actual implementation process, the input shaft of the external motor is in butt joint with the planetary reduction mechanism, and meanwhile, the box body of the external motor is in butt joint with the box body 1, so that the high-rotation-speed force input process is completed.

In an alternative embodiment of the present utility model, the planetary reduction mechanism includes a built-in planetary reduction mechanism and a mating planetary reduction mechanism; the embodiment of the utility model is a secondary planetary gear reducer device, the matched planetary reduction mechanism is abutted against an input shaft of an external motor to complete first speed reduction, then the matched planetary reduction mechanism transmits force to a built-in planetary reduction mechanism, and the built-in planetary reduction mechanism is used for completing second speed reduction;

the built-in planetary reduction mechanism is preloaded in the device, and the matched planetary reduction mechanism can be subjected to gear replacement through the second mounting opening 12 so as to realize different reduction effects; the matched planetary reduction mechanism can realize 15 speed ratios.

In an alternative embodiment of the present utility model, as shown in fig. 3, the planetary reduction mechanism includes:

a mating sun gear 211 coaxial with the second mounting opening 12 and extending out of the second mounting opening 12; under the action of the force of the input shaft of the external motor, the matched sun gear 211 rotates by taking the input shaft as the axis;

first, second and third mating planet gears 2121, 2122 and 2123 surrounding the mating sun gear 211 and meshing with the mating sun gear 211; the first, second and third mating planetary gears 2121, 2122 and 2123 rotate and revolve around the mating sun gear 211 under the force of the mating sun gear 211;

a mating carrier 213 connected to the planetary gear set; the supporting planetary carrier 213 is driven by the first supporting planetary gear 2121, the second supporting planetary gear 2122 and the third supporting planetary gear 2123 to rotate coaxially with the input shaft.

As shown in fig. 4, in an alternative embodiment of the present utility model, the first, second and third mating planetary shafts 2131, 2132 and 2133 corresponding to the three planetary gears of the mating planetary mechanism are mounted on the mating planetary carrier 213;

the first auxiliary planetary shaft 2131, the second auxiliary planetary shaft 2132 and the third auxiliary planetary shaft 2133 are fixedly connected with the corresponding planetary gears through needle bearings; the planetary gear rotates around the planetary shaft;

the planet shafts are secured to the mating planet carrier 213 by an interference fit.

In an alternative embodiment of the present utility model, the center of the supporting planet carrier 213 is further provided with a mounting hole 2134, and the mounting hole 2134 is connected with the built-in planetary mechanism; the matched planet carrier 213 drives the built-in planetary mechanism to rotate;

in an alternative embodiment of the present utility model, as shown in fig. 1, the built-in planetary mechanism includes:

a built-in sun gear 221 connected to the mounting hole 2134 of the mating carrier 213 via a retainer ring; the supporting planet carrier 213 transmits force to the built-in sun gear 221 when rotating, and the built-in sun gear 221 rotates by taking an input shaft as an axle center under the driving of the supporting planet carrier 213;

a first built-in planetary gear 2221, a second built-in planetary gear 2222, and a third built-in planetary gear (not shown in the drawings) which are wound around the built-in sun gear 221 and mesh with the built-in sun gear 221; the planetary gears rotate and revolve around the built-in sun gear 221 under the force of the built-in sun gear 221;

a built-in carrier 223 connected to the planetary gear combination; the built-in planet carrier 223 rotates coaxially with the input shaft under the drive of the planet gear.

In an alternative embodiment of the present utility model, the inner planet carrier 223 is provided with a first inner planet shaft (not shown in the figure), a second inner planet shaft 2232 and a third inner planet shaft (not shown in the figure) corresponding to the planetary gears of the inner planetary mechanism, respectively;

the planetary shafts are fixedly connected with the corresponding planetary gears through needle bearings; the planetary gear rotates around the planetary shaft;

the planet axle is secured to the inner planet carrier 223 by an interference fit.

In an alternative embodiment of the utility model, the shaft and bearing combination comprises:

an output shaft 31 friction-welded to the center of the inner carrier 223; the output shaft 31 coincides with the axis of the input shaft when the inner carrier 223 rotates; the built-in planet carrier 223 drives the output shaft 31 to rotate around the axis, and after being transmitted by the planetary reduction mechanism, the low-rotation-speed and high-torque force is output through the output shaft 31;

the output shaft 31 is made of duplex stainless steel, and in order to reduce stress concentration, a transition fillet and a spline at a shoulder on the shaft are subjected to necessary treatment to increase the fatigue strength of the shaft;

a rolling bearing 32 mounted on the inner wall of the case 1 at the first opening 11; the rolling bearing 32 fixedly supports the output shaft 31, and the static friction moment and the dynamic friction moment of the rolling bearing can still keep small values when the load and the speed change within a wide range;

a framework oil seal 33 positioned outside the rolling bearing 32 and fixed on the inner wall of the box body 1; the skeleton oil seal 33 can enhance mechanical sealing performance and prevent contaminated gear oil from entering the bearing, so that the bearing fails.

The planetary gear reducer has the following specific working process:

the matched planetary gear mechanism rotates firstly after being acted by the input shaft force; the input shaft firstly transmits force to the matched sun gear 211, the planetary gears are driven to rotate after the matched sun gear 211 rotates, and the rotation of the planetary gears causes the rotation of the matched planet carrier 213; because the number of teeth of the matched sun gear 211 is smaller than that of the planetary gears, the rotation speed of the matched planet carrier 213 is smaller than that of the input shaft, which is the primary speed reduction completed by the matched planetary gear mechanism; the supporting planet carrier 213 rotates to drive the built-in sun gear 221 of the built-in planet gear mechanism to rotate, the built-in sun gear 221 drives the planet gears meshed with the built-in sun gear 221 to rotate, and the planet gears drive the built-in planet carrier 223 to rotate; the output shaft is connected with the built-in planet carrier 223 to output force; the number of teeth of the built-in sun gear 221 is smaller than that of the planetary gears meshed therewith, so that the rotation speed output from the output shaft 31 is smaller than that of the built-in sun gear 221; this is a two-stage deceleration accomplished by the built-in planetary gear mechanism;

according to the embodiment of the utility model, as the gears of the matched planetary gear mechanism can be replaced, different tooth number and modulus combination forms are formed, so that the speed reducing mechanism of the embodiment can have different transmission ratios, and the application range of the speed reducer is greatly expanded; the transmission of speed reducer power is more reasonable, and required spare part is fewer, and the design of whole device is more retrencied.

While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the present utility model.

Claims (4)

1. A planetary gear reducer device, characterized by comprising:

a case (1);

a planetary reduction mechanism arranged in the box body (1);

a shaft and bearing assembly connected with the planetary reduction mechanism and extending out of the box body;

the box body (1) is internally provided with two communicated cavities, the shaft and bearing combination is arranged in the first cavity, and the shaft and bearing combination extends out of the first cavity from a first opening (11) in the box body (1);

the planetary reduction mechanism is arranged in a second cavity, the second cavity is communicated with the outside through a second mounting opening (12), and an annular gear (13) is fixed on the inner wall of the second cavity;

the planetary reduction mechanism comprises a built-in planetary reduction mechanism and a matched planetary reduction mechanism;

wherein, supporting planetary reduction gears includes:

a mating sun gear (211) coaxial with the second mounting opening (12) and extending out of the second mounting opening (12);

a first (2121), a second (2122) and a third (2123) mating planetary gears surrounding the mating sun gear (211) and meshed with the mating sun gear (211);

a mating carrier (213) connected to the first mating planetary gear (2121), the second mating planetary gear (2122) and the third mating planetary gear (2123);

wherein, the matched planet carrier (213) is provided with a first matched planet shaft (2131), a second matched planet shaft (2132) and a third matched planet shaft (2133) which are respectively corresponding to the three planetary gears of the matched planetary reduction mechanism;

the first matched planetary shaft (2131), the second matched planetary shaft (2132) and the third matched planetary shaft (2133) are fixedly connected with the corresponding planetary gears through needle bearings;

the first (2131), second (2132) and third (2133) mating planet shafts are fixed to the mating planet carrier (213) by interference fit;

wherein, the center of the matched planet carrier (213) is also provided with a mounting hole (2134), and the mounting hole (2134) is connected with the built-in planetary reduction mechanism;

wherein, built-in planetary reduction mechanism includes:

a built-in sun gear (221) connected with a mounting hole (2134) of the matched planet carrier (213) through a check ring;

a first built-in planetary gear (2221), a second built-in planetary gear (2222) and a third built-in planetary gear which surround the built-in sun gear (221) and mesh with the built-in sun gear (221);

and a built-in planetary carrier (223) connected to the first built-in planetary gear (2221), the second built-in planetary gear (2222), and the third built-in planetary gear.

2. A planetary gear reducer arrangement according to claim 1, characterized in that the first opening (11) is coaxial with the second mounting opening (12), and the reducer interfaces with an external motor through the second mounting opening (12).

3. The planetary gear reducer device according to claim 1, wherein the built-in carrier (223) is mounted with a first built-in planetary shaft, a second built-in planetary shaft (2232) and a third built-in planetary shaft corresponding to planetary gears of the built-in planetary reduction mechanism, respectively;

the first built-in planetary shaft, the second built-in planetary shaft (2232) and the third built-in planetary shaft are fixedly connected with the corresponding planetary gears through needle bearings;

the first, second (2232) and third inner planet shafts are fixed to the inner planet carrier (223) by means of an interference fit.

4. The planetary gear reducer apparatus of claim 1, wherein the shaft and bearing combination comprises:

an output shaft (31) friction-welded to the center of the inner carrier (223);

a rolling bearing (32) arranged on the inner wall of the box body (1) at the first opening (11);

and a framework oil seal (33) positioned outside the rolling bearing (32) and fixed on the inner wall of the box body (1).

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