CN216842914U

CN216842914U - High-precision planetary reducer with variable speed ratio

Info

Publication number: CN216842914U
Application number: CN202123425071.0U
Authority: CN
Inventors: 华涛
Original assignee: Changzhou Jike Transmission Equipment Co ltd
Current assignee: Changzhou Jike Transmission Equipment Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-06-28
Anticipated expiration: 2031-12-31

Abstract

The utility model discloses a high accuracy planetary reducer of variable velocity ratio, include: the planetary speed reducer is characterized in that the electromagnetic switch assembly is fixed above the planetary speed reducer, the right end of the electromagnetic switch assembly and the right end of the planetary speed reducer are located on the same plane, and the front cover plate is installed on the right side of the electromagnetic switch assembly and the right side of the planetary speed reducer. This high accuracy planetary reducer of variable velocity ratio for the armature rotational speed descends by a wide margin after reduction planetary mechanism deceleration structure, and has solved the apical tooth of old structure and the problem that the milling tooth became invalid, and reduction planetary mechanism has increased the moment of torsion when reducing the rotational speed, and the part of this speed reducer has reduced the manufacturing process of each part after optimizing simultaneously, greatly reduced manufacturing cost.

Description

High-precision planetary reducer with variable speed ratio

Technical Field

The utility model relates to an air-cooled horizontal bar and parallel bars diesel engine field specifically are a high accuracy planetary reducer of variable velocity ratio.

Background

There are two types of starting products currently used in this air-cooled diesel engine: hand-operated pull-free device and pure electric motor starter.

The hand-operated pull-free device is similar to a clockwork spring mechanism, a spring clockwork spring is pulled by hand-operated torque to store torque force, and then the engine flywheel is driven to rotate by releasing the clockwork spring to achieve the effect of starting the engine, but the defects of the products are obvious, manpower is needed to work, great manpower resources are wasted, and the durability and the consistency of the clockwork spring mechanism are poor.

The pure electric machine starter is simple in structure, a motor armature is fixed in a space formed by an upper end cover, a lower end cover and a machine shell, 4 excitation line groups wound by copper wires or copper-clad aluminum wires are equally fixed on the circumference of the inner wall of a cylindrical machine shell, a commutator at the tail part of the motor armature conducts electrification and commutation work through a carbon brush assembly, and the front section of the motor is in transmission with a flywheel gear ring of an engine through a simple gear part. However, because the single motor driving structure enables the rotating speed of the motor to exceed 10000 r/m, the motor is required to insert the motor gear into the engine gear ring for matching under the condition of high speed, and the problem that the two gears are mutually cut or the gears cannot be jacked into the gear ring is easily caused. In addition, the torque of the pure electric machine structure is too low, and the low torque characteristic of the pure electric machine structure can cause the engine to be not started under the condition that the engine is aged or the ambient temperature is too low.

In view of the above, the present invention has been made in view of the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high accuracy planetary reducer of variable velocity ratio to solve the defect mentioned in the above-mentioned background art.

In order to achieve the above object, there is provided a high precision planetary reducer with a variable speed ratio, comprising: the planetary speed reducer is characterized in that the electromagnetic switch assembly is fixed above the planetary speed reducer, the right end of the electromagnetic switch assembly and the right end of the planetary speed reducer are located on the same plane, and the front cover plate is installed on the right side of the electromagnetic switch assembly and the right side of the planetary speed reducer.

Furthermore, the electromagnetic switch assembly is fixed above the planetary speed reducing mechanism in parallel through a plastic shifting fork, the front cover plate is installed on the right side of the electromagnetic switch assembly and the planetary speed reducing mechanism through screws, and a shifting fork pin shaft is installed on the right side of the plastic shifting fork.

Further, the electromagnetic switch assembly includes: switch and switch core, the switch is fixed in the right side of electromagnetic switch subassembly, switch core of switch left side parallel mount.

Furthermore, the electromagnetic switch component adopts rare earth permanent magnetic materials.

Further, the planetary reduction mechanism includes: the gearbox comprises a planet carrier driving shaft, a rotor assembly, an output shaft oil-retaining bearing, isolators, planet box copper liners, planet gears, an inner gear ring, a planet reduction box fixing plate, a box cover, a machine shell assembly, a rear end cover assembly and a screw rod, wherein the planet carrier driving shaft is fixed on the left side, two front cover copper liners are symmetrically arranged on the upper side and the lower side of the front end of the planet carrier driving shaft, two isolators are symmetrically arranged on the upper side and the lower side of the planet carrier driving shaft, the rotor assembly is arranged on the right side of the planet carrier driving shaft, two output shaft oil-retaining bearings are symmetrically fixed on the upper side and the lower side of the top end of the rotor assembly, two planet box copper liners are fixed on the upper side and the lower side of the rotor assembly, one planet gear is fixed on the right side of the planet box copper liners, the inner gear ring is connected below the planet gears, the box cover is arranged on the right side of the inner gear ring, and the planet reduction box fixing plate is positioned on the planet box copper liners, the box cover, The right side of the rotor component is fixedly provided with a casing component, the right side of the casing component is provided with a rear end cover component, and the right side of the rear end cover component is fixedly provided with a screw.

Further, the planet box copper lining is located below the output shaft oil bearing.

Further, the upper end of the planet box copper lining and the upper end of the box cover are located on the same horizontal plane.

Furthermore, the upper side and the lower side of the rotor assembly are symmetrically provided with the planetary gear, the inner gear ring, the box cover, the planetary reduction box fixing plate, the machine shell assembly and the rear end cover assembly.

Further, a front end cover is installed below the planet carrier driving shaft, the front end cover is located below the isolator, and the right side of the front end cover extends upwards into the planet box copper lining.

Furthermore, the planetary reduction mechanism also comprises a planetary ring carrier, the planetary ring carrier is integrated, the gear ring and the gear are designed into a whole, a base of the gear ring is integrally cast by using a steel plate and high-strength nylon, the gear ring and the gear are arranged above a fixed plate of a planetary reduction box body of the gear ring, a shifting fork support is arranged in the middle of the fixed plate, a round hole of a fixed switch is arranged below the fixed plate, and a clamping seat is arranged on the back of the fixed plate of the planetary reduction box body, so that the planetary reduction mechanism is suitable for the application of the speed ratio range of 2-3.

Further, the diameter range of the addendum circle of the gear ring is 42.2mm-44.2mm, the diameter range of the root circle is 47.3mm-49.3mm, and the diameter range of the reference circle is 45.25mm-47.25 mm.

Further, the height from the top surface of the gear ring to the bottom plate is 15mm-24mm, and the outer diameter of the gear ring is as follows: 55.6mm-65.6mm, the distance from the center of the gear ring to the center of the circular hole of the fixed switch is as follows: 55.5mm-66.5 mm.

Furthermore, the length of the shifting fork support is 22mm-26mm, the width of the shifting fork support is 3.1mm-7.1mm, the center thickness of the shifting fork support is 5.3mm-9.3mm, and the height from the top end of the shifting fork support to the bottom plate is 7.4mm-11.4 mm.

Furthermore, the planetary reduction mechanism also comprises a planetary ring carrier, the planetary ring carrier is integrated, a gear ring and a gear are separately designed, a steel plate base is used as a base of the gear ring, a nylon material is poured on the base to form a gear ring seat, an iron-based material is used as the gear ring, the gear ring and the gear are arranged above a fixed plate of the planetary reduction box body of the gear ring, a shifting fork support is arranged in the middle of the fixed plate, a fixed switch round hole is arranged below the fixed plate of the planetary reduction box body, and a clamping seat is arranged on the back of the fixed plate of the planetary reduction box body and is suitable for application of a speed ratio range of 3-7.

Furthermore, the wall thickness of the clamping seat is 3-10mm, the height from the top end to the bottom of the clamping seat is 16-25mm, the clamping seat is provided with 4-8 grooves, and the width of each groove is 2-10 mm.

Further, the thickness of the gear ring is 5-15mm, the height from the top surface of the gear ring to the bottom plate is 15-24 mm, the outer diameter of the gear ring is 55.6-65.6 mm, and the distance from the center of the gear ring to the center of the circular hole of the fixed switch is 55.5-66.5 mm.

Furthermore, the front cover plate is of a concentric structure, namely the intersection of the connecting lines of the centers of the two mounting through holes is superposed with the center of the driving shaft, the angle formed by the centers of the two mounting through holes and the center of the driving shaft is 125-162 degrees, and the diameter range of the outer diameter of the step of the front cover is 63-67 mm.

Furthermore, the front cover plate is of an eccentric structure, namely the distance between the intersection line of the centers of the two mounting through holes and the center of the driving shaft is 2.5-5 mm, the angle formed by the centers of the two mounting through holes and the center of the driving shaft is 125-162 degrees, and the diameter range of the outer diameter of the step of the front cover is 63-67 mm.

Furthermore, the thickness range of the front cover step ears of the front cover plate after the motor is installed is 9mm-15mm, and the size range from the front end surface of the isolator gear to the plane of the front cover step is 11mm-15mm after the motor is installed.

Further, the height from the top end of the front cover plate to the mounting surface is 35mm-55 mm.

Compared with the prior art, the beneficial effects of the utility model are that: make armature rotational speed descend by a wide margin behind the reduction planetary gear mechanism speed reduction structure, and solved the problem that the apical tooth of old structure became invalid with the milling tooth, reduction gear mechanism is when reducing the rotational speed, has increased the moment of torsion, simultaneously, the part of this speed reducer is through optimizing the back, has reduced the manufacturing process of each part, greatly reduced manufacturing cost.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the internal connection of the structure of the present invention;

fig. 3 is a schematic structural view of a planetary gear ring carrier in embodiment 1 of the present invention;

fig. 4 is a front cover plate structure front view of embodiment 1 of the present invention;

fig. 5 is a schematic structural view of a planetary gear ring carrier in embodiment 2 of the present invention;

fig. 6 is a front cover plate structure front view according to embodiment 2 of the present invention.

Reference numbers in the figures: 1. an electromagnetic switch assembly; 11. a switch; 12. a switch core; 2. a planetary reduction mechanism; 21. a planet carrier drive shaft; 22. a rotor assembly; 23. an output shaft oil-retaining bearing; 24. a one-way clutch; 25. a planet box copper liner; 26. a planetary gear; 27. an inner gear ring; 28. a planetary reduction box body fixing plate; 29. a box cover; 210. a housing assembly; 211. a rear end cap assembly; 212. a screw; 213: a front cover copper lining; 214. a front end cover; 215. a planetary carrier; 2151. a ring gear; 2152. a gear; 2153. a base; 2154. a shifting fork support; 2155. fixing a switch round hole; 2156. a card holder; 2157. a groove; 3. a front cover plate; 31. mounting a through hole; 32. a drive shaft; 33. a front cover step; 34. an ear; 4. a plastic shifting fork; 5. a screw; 6. and (4) shifting a pin shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1:

referring to fig. 1-2, the present invention provides a variable-ratio high-precision planetary reducer, comprising: the planetary speed reducer is characterized in that the electromagnetic switch assembly 1 is fixed above the planetary speed reducer 2, the right end of the electromagnetic switch assembly 1 and the right end of the planetary speed reducer 2 are located on the same plane, the front cover plate 3 is installed on the right side of the electromagnetic switch assembly 1 and the planetary speed reducer 2, and the electromagnetic switch assembly 1 and the planetary speed reducer 2 are connected together through the front cover plate 3 from the outside. The electromagnetic switch assembly 1 is parallelly fixed above the planetary reduction mechanism 2 through a plastic shifting fork 4, the front cover plate 3 is installed on the right side of the planetary reduction mechanism 2 through a screw 5, and a shifting fork pin shaft 6 is installed on the right side of the plastic shifting fork 4, so that the electromagnetic switch assembly 1 and the planetary reduction mechanism 2 are connected together.

The electromagnetic switch assembly 1 includes: switch 11 and switch core 12, switch 11 is fixed in the right side of electromagnetic switch subassembly 1, switch core 12 of switch 11 left side parallel mount, when the circular telegram, electromagnetic switch subassembly 1 connects the circular telegram and produces electromagnetic attraction under electromagnetic induction's physical action, and this part has adopted tombarthite permanent magnetism material simultaneously, has replaced original copper wire winding. The material cost is saved.

The planetary reduction mechanism 2 includes: the planetary carrier driving shaft 21, the rotor assembly 22, the output shaft oil-retaining bearing 23, the isolator 24, the planetary box copper lining 25, the planetary gear 26, the inner gear ring 27, the planetary reduction box fixing plate 28, the box cover 29, the machine shell assembly 210, the rear end cover assembly 211, the screw 212 and the front cover copper lining 213.

The planet carrier driving shaft 21 is fixed on the left side, two front cover copper liners 213 are symmetrically installed on the upper and lower sides of the front end of the planet carrier driving shaft 21, two isolators 24 are symmetrically installed on the upper and lower sides of the planet carrier driving shaft 21, the rotor assembly 22 is installed on the right side of the planet carrier driving shaft 21, two output shaft oil-containing bearings 23 are symmetrically fixed on the upper and lower sides of the top end of the rotor assembly 22, two planet box copper liners 25 are fixed on the upper and lower sides of the rotor assembly 22, the planet box copper liners 25 are located below the output shaft oil-containing bearings 23, the upper ends of the planet box copper liners 25 and the upper end of the box cover 29 are located on the same horizontal plane, one planet gear 26 is fixed on the right side of the planet box copper liner 25, the inner gear ring 27 is connected below the planet gear 26, and the box cover 29 is installed on the right side of the inner gear ring 27, the planetary reduction box fixing plate 28 is located below the planetary box copper lining 25, the planetary gear 26, the inner gear ring 27 and the box cover 29, the upper end of the planetary box copper lining 25 and the upper end of the box cover 29 are located on the same horizontal plane, the right side of the rotor assembly 22 is fixed with a machine shell assembly 210, the right side of the machine shell assembly 210 is provided with a rear end cover assembly 211, the right side of the rear end cover assembly 211 is fixed with a screw rod 212, and the upper side and the lower side of the rotor assembly 22 are symmetrically provided with the planetary gear 26, the inner gear ring 27, the box cover 29, the planetary reduction box fixing plate 28, the machine shell assembly 210 and the rear end cover assembly 211.

A front end cover 214 is installed below the planet carrier driving shaft 21, the front end cover 214 is located below the isolator 24, and the right side of the front end cover 214 extends upwards into the planet box copper lining 25. After the armature rotating speed passes through the speed reducing structure of the speed reducing planetary mechanism 2, the rotating speed of the isolator 24 is 1500-3500, and the meshing of the full rotating speed solves the failure modes of the top tooth and the milling tooth of the old structure, and simultaneously increases the torque, so that the output force of the speed reducing motor is larger, and the engine can still normally work under the conditions of refrigeration and larger internal resistance of the engine. The structure of the motor is optimized, the structural space is compressed in a size convenient to install, and the manufacturing cost is reduced.

As shown in fig. 3, in the present embodiment, the planetary reduction mechanism 2 further includes a planetary carrier 215, the planetary carrier 215 is an integral structure, the ring gear 2151 and the gear 2152 are designed as an integral structure, the base 2153 of the ring gear 2151 is made of a steel plate, the ring gear 2151 is integrally cast by high-strength nylon, the ring gear 2151 and the gear 2152 are disposed above the ring gear planetary reduction box fixing plate 28, the fork support 2154 is disposed in the middle, the fixed switch round hole 2155 is disposed below the ring gear planetary reduction box fixing plate 28, and the back of the planetary reduction box fixing plate 28 is provided with a clamping seat 2156, which is suitable for applications with a speed ratio range of 2-3. The diameter scope of the addendum circle of the gear ring 2151 is 43.2mm, the diameter scope of the dedendum circle is 48.3mm, the diameter scope of the reference circle is 46.25mm, the height from the top surface to the bottom plate of the gear ring 2151 is 19mm, and the outer diameter of the gear ring 2151 is as follows: 60.6mm, the distance of ring gear 2151 center to fixed switch round hole 2155 center is 60.5mm, the bottom to the bottom plate that the shift fork supported 2154 is 24mm, and the width is 5.1mm, and central thickness is 7.3mm, the height that the shift fork supported 2154 top to the bottom plate is 9.4 mm.

As shown in fig. 4, in the present embodiment, the front cover plate 3 is of a concentric structure, that is, the intersection of the connecting lines between the centers of the two mounting through holes 31 coincides with the center of the driving shaft 32, the angle formed by the centers of the two mounting through holes 31 and the center of the driving shaft 32 is 158 °, the diameter range of the outer diameter of the front cover step 33 is 65mm, the thickness range of the ear 34 of the front cover step 33 after the motor is mounted on the front cover plate 3 is 11mm, and the range of the plane size from the front end face of the gear of the one-way clutch 25 to the front cover step 33 after the motor is mounted on the front cover plate is 13 mm.

Example 2:

The planet carrier driving shaft 21 is fixed on the left side, two front cover copper linings 213 are symmetrically arranged on the upper and lower sides of the front end of the planet carrier driving shaft 21, two isolators 24 are symmetrically arranged on the upper and lower sides of the planet carrier driving shaft 21, the rotor assembly 22 is arranged on the right side of the planet carrier driving shaft 21, two output shaft oil-retaining bearings 23 are symmetrically fixed on the upper and lower sides of the top end of the rotor assembly 22, two planet carrier copper linings 25 are fixed on the upper and lower sides of the rotor assembly 22, the planet carrier copper linings 25 are positioned below the output shaft oil-retaining bearings 23, the upper ends of the planet carrier copper linings 25 and the upper end of the box cover 29 are positioned on the same horizontal plane, the planet gear 26 is fixed on the right side of the planet carrier copper linings 25, the inner gear ring 27 is connected below the planet gear 26, and the box cover 29 is arranged on the right side of the inner gear ring 27, the planetary reduction box fixing plate 28 is located below the planetary box copper lining 25, the planetary gear 26, the inner gear ring 27 and the box cover 29, the upper end of the planetary box copper lining 25 and the upper end of the box cover 29 are located on the same horizontal plane, the right side of the rotor assembly 22 is fixed with a machine shell assembly 210, the right side of the machine shell assembly 210 is provided with a rear end cover assembly 211, the right side of the rear end cover assembly 211 is fixed with a screw rod 212, and the upper side and the lower side of the rotor assembly 22 are symmetrically provided with the planetary gear 26, the inner gear ring 27, the box cover 29, the planetary reduction box fixing plate 28, the machine shell assembly 210 and the rear end cover assembly 211.

A front end cover 214 is installed below the planet carrier driving shaft 21, the front end cover 214 is located below the isolator 24, and the right side of the front end cover 214 extends upwards into the planet box copper lining 25. After the armature rotating speed passes through the speed reducing structure of the speed reducing planetary mechanism 2, the rotating speed of the one-way device 24 is 1500-3500, and the meshing of the full rotating speed solves the failure mode of the top teeth and the milling teeth of the old structure, and simultaneously increases the torque, so that the output power of the speed reducing motor is larger, and the engine can still normally work under the conditions of refrigeration and larger internal resistance of the engine. The structure of the motor is optimized, the structural space is compressed in a size convenient to install, and the manufacturing cost is reduced.

As shown in fig. 5, in this embodiment, the planetary reduction mechanism 2 further includes a planetary carrier 215, the planetary carrier 215 is an integral type, the ring gear 2151 and the gear 2152 are separately designed, the base 2153 of the ring gear 2151 is made of a steel plate base and nylon material is poured on the base to form a ring gear seat, the ring gear 2151 is made of iron-based material, the ring gear 2151 and the gear 2152 are arranged above the ring gear planetary reduction box fixing plate 28, a fork support 2154 is arranged in the middle, a fixed switch round hole 2155 is arranged below the ring gear planetary reduction box fixing plate, and a clamping seat 2156 is arranged on the back of the planetary reduction box fixing plate 28, which is suitable for applications with a speed ratio range of 3-7.

The wall thickness of the clamping seat 2156 is 3-10mm, the height from the top end to the bottom of the clamping seat 2156 is 16-25mm, the clamping seat 2156 is provided with 4-8 grooves 2157, and the width of each groove 2157 is 2-10 mm. The diameter scope of the addendum circle of the gear ring 2151 is 43.2mm, the diameter scope of the dedendum circle is 48.3mm, the diameter scope of the reference circle is 46.25mm, the thickness of the gear ring 2151 is 9.5mm, the height from the top surface of the gear ring 2151 to the bottom plate is 19mm, the outer diameter of the gear ring 2151 is 60.6mm, and the distance from the center of the gear ring 2151 to the center of the fixed switch round hole 2156 is 60.5 mm. The bottom of shift fork support 2154 is 24mm to the height of bottom plate, and the width is 5.1mm, and central thickness is 7.3mm, the height of shift fork support 2154 top to the bottom plate is 9.4 mm.

As shown in fig. 6, in the present embodiment, the front cover plate 3 has an eccentric structure, the distance between the intersection of the connecting lines of the centers of the two mounting through holes 31 and the center of the driving shaft 32 is 3.35mm, the angle formed by the centers of the two mounting through holes 31 and the center of the driving shaft 32 is 158 °, the diameter range of the outer diameter of the front cover step 33 is 65mm, the thickness range of the ear 34 of the front cover step 33 after the motor is mounted on the front cover plate is 11mm, and the size range from the front end face of the gear of the one-way clutch 25 to the plane of the front cover step 33 after the motor is mounted on the front cover plate is 13 mm.

The working principle is as follows: when the electromagnetic switch assembly 1 is powered on, the electromagnetic switch 11 is powered on at the moment of power on and generates electromagnetic attraction under the physical action of electromagnetic induction, so that the switch iron core 12 is attracted towards the electromagnetic switch 11. The pull-up of the switch iron core 12 triggers the lever component consisting of the shifting fork pin shaft 6 and the plastic shifting fork 4 to work, the gear of the isolator 24 is pushed out in the direction opposite to the movement direction of the switch iron core 12, meanwhile, the armature of the rotor assembly 22 is switched on to start rotating, the armature of the rotor assembly 22 rotates, the planetary gear 26 runs simultaneously, the planetary gear drives the inner gear ring 27 and the planet carrier driving shaft 21, and the isolator 24 also starts rotating simultaneously; the whole process of the variable-speed-ratio high-precision planetary reducer is the whole process of working.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A variable ratio high precision planetary reducer comprising: electromagnetic switch subassembly (1), planet reduction gears (2) and front shroud (3), its characterized in that, electromagnetic switch subassembly (1) is fixed in the top of planet reduction gears (2), the right-hand member of electromagnetic switch subassembly (1) with the right-hand member of planet reduction gears (2) is located the coplanar, front shroud (3) install in electromagnetic switch subassembly (1) with the right side of planet reduction gears (2).

2. A variable ratio high precision planetary reducer according to claim 1, characterized in that: the electromagnetic switch assembly is characterized in that the electromagnetic switch assembly (1) is parallelly fixed above the planetary speed reducing mechanism (2) through a plastic shifting fork (4), the front cover plate (3) is installed on the right side of the planetary speed reducing mechanism (2) of the electromagnetic switch assembly (1) through a screw (5), and a shifting fork pin shaft (6) is installed on the right side of the plastic shifting fork (4).

3. A variable ratio high precision planetary reducer according to claim 1, characterized in that: the electromagnetic switch assembly (1) comprises: switch (11) and switch core (12), switch (11) are fixed in the right side of electromagnetic switch subassembly (1), switch core (12) of switch (11) left side parallel mount.

4. A variable ratio high precision planetary reducer according to claim 1, characterized in that: the planetary reduction mechanism (2) includes: the gearbox comprises a planet carrier driving shaft (21), a rotor assembly (22), output shaft oil-retaining bearings (23), isolators (24), planet carrier copper linings (25), a planetary gear (26), an inner gear ring (27), a planetary reduction box fixing plate (28), a box cover (29), a machine shell assembly (210), a rear end cover assembly (211), a screw rod (212) and front cover copper linings (213), wherein the planet carrier driving shaft (21) is fixed on the left side, the two front cover copper linings (213) are symmetrically arranged on the upper side and the lower side of the front end of the planet carrier driving shaft (21), the two isolators (24) are symmetrically arranged on the upper side and the lower side of the planet carrier driving shaft (21), the rotor assembly (22) is arranged on the right side of the planet carrier driving shaft (21), the two output shaft oil-retaining bearings (23) are symmetrically fixed on the upper side and the lower side of the top end of the rotor assembly (22), the two planet carrier copper linings (25) are fixed on the upper side and the lower side of the rotor assembly (22), the right side of the planet box copper lining (25) is fixedly provided with the planet gear (26), the lower part of the planet gear (26) is connected with the inner gear ring (27), the right side of the inner gear ring (27) is provided with the box cover (29), the planet reduction box fixing plate (28) is positioned below the planet box copper lining (25), the planet gear (26), the inner gear ring (27) and the box cover (29), the right side of the rotor assembly (22) is fixedly provided with the machine shell assembly (210), the right side of the machine shell assembly (210) is provided with the rear end cover assembly (211), and the right side of the rear end cover assembly (211) is fixedly provided with the screw (212).

5. A variable ratio high precision planetary reducer according to claim 4, characterized in that: the planet box copper lining (25) is positioned below the output shaft oil-containing bearing (23).

6. A variable ratio high precision planetary reducer according to claim 4, characterized in that: the upper end of the planet box copper lining (25) and the upper end of the box cover (29) are positioned on the same horizontal plane.

7. A variable ratio high precision planetary reducer according to claim 4, characterized in that: the upper side and the lower side of the rotor assembly (22) are symmetrically provided with the planetary gear (26), the inner gear ring (27), the box cover (29), the planetary reduction box fixing plate (28), the machine shell assembly (210) and the rear end cover assembly (211).

8. A variable ratio high precision planetary reducer according to claim 4, characterized in that: a front end cover (214) is installed below the planet carrier driving shaft (21), the front end cover (214) is located below the isolator (24), and the right side of the front end cover (214) extends upwards to the planet box copper lining (25).

9. A variable ratio high precision planetary reducer according to claim 4, characterized in that: the electromagnetic switch assembly (1) is parallelly fixed above the planetary speed reducing mechanism (2) through a plastic shifting fork (4), and the front cover plate (3) is installed on the right side of the electromagnetic switch assembly (1) and the planetary speed reducing mechanism (2) through a screw (5).