CN110966359A - Inverted rotary speed reducer - Google Patents

Inverted rotary speed reducer Download PDF

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Publication number
CN110966359A
CN110966359A CN201811048663.5A CN201811048663A CN110966359A CN 110966359 A CN110966359 A CN 110966359A CN 201811048663 A CN201811048663 A CN 201811048663A CN 110966359 A CN110966359 A CN 110966359A
Authority
CN
China
Prior art keywords
brake
gear
shaft
connecting shaft
bearing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN201811048663.5A
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Chinese (zh)
Inventor
龚宝巨
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taixing Jin'ao Machinery Manufacturing Co ltd
Original Assignee
Taixing Jin'ao Machinery Manufacturing Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Taixing Jin'ao Machinery Manufacturing Co ltd filed Critical Taixing Jin'ao Machinery Manufacturing Co ltd
Priority to CN201811048663.5A priority Critical patent/CN110966359A/en
Publication of CN110966359A publication Critical patent/CN110966359A/en
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/36—Toothed gearings for conveying rotary motion with gears having orbital motion with two central gears coupled by intermeshing orbital gears
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/029—Gearboxes; Mounting gearing therein characterised by means for sealing the gearboxes, e.g. to improve airtightness

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

The invention discloses a rotary speed reducer, and belongs to the technical field of speed reducers. The power source is arranged at the lower end of the whole machine, the upper part of the power source is connected with the brake, the upper part of the brake is connected with the speed change mechanism, and the upper part of the speed change mechanism is connected with the power output mechanism; the lower end of the brake connecting shaft is provided with a bearing, and the upper end of the brake connecting shaft is hermetically provided with a framework oil seal for isolating the inner cavity of the brake from the inner cavity of the gear ring; and a dustproof cover is fixed at the upper end of the bearing seat and is in sealing connection with the output gear shaft. The invention has the beneficial effects that: the inverted working mode of the power input system of the rotary speed reducer below and the power output system above can be realized, and the operation is stable and reliable. The framework oil seal can isolate the inner cavity of the brake from the inner cavity of the gear ring, so that ablation of the friction plate is prevented. The dustproof cover and the dustproof oil seal can prevent external silt from entering, and the service life of the speed reducer is effectively prolonged.

Description

Inverted rotary speed reducer
Technical Field
The invention relates to a rotary speed reducer, and belongs to the technical field of speed reducers.
Background
The main parts of the rotary speed reducer for the existing engineering machinery are sequentially from top to bottom: the brake system mainly comprises four parts, namely a power input system (such as a hydraulic motor or a motor), a brake system, a transmission system, an output system (such as an output gear) and the like. The installation mode is mainly that the power input system is arranged on the upper part, the power output system is arranged on the lower part, and the power input system is meshed with the rotary support through an output gear on the rotary speed reducer. However, in some cases, due to the structural space limitation of the main engine or other requirements, the slewing reducer must be installed upside down (such as a slewing system of a concrete pump truck), and the existing slewing reducer is difficult to meet the requirements. When the existing speed reducer is inverted, because the internal transmission part is installed in a floating way, the existing speed reducer is bound to cause axial slippage under the action of self gravity and abut against a hydraulic motor to cause interference; meanwhile, when the rotary speed reducer is inverted, abrasion particles and other impurities abraded by long-term work of the transmission system easily enter a space between the friction moving plate and the friction fixed plate, so that the friction plate is ablated to cause braking failure.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a rotary speed reducer, which can realize the inversion working mode that a power input system is arranged at the bottom and a power output system is arranged at the top, and effectively solve the technical problem caused by inversion by additionally arranging a bearing, a framework oil seal and a dust cover.
The invention is realized by the following technical scheme: a slewing gear-reduction apparatus, comprising: the power source is arranged at the lower end of the whole machine, the upper part of the power source is connected with the brake, the upper part of the brake is connected with the speed change mechanism, and the upper part of the speed change mechanism is connected with the power output mechanism; the connecting flange, the brake shell, the gear ring and the bearing seat are rigidly connected into an integral casing from bottom to top, a transmission system in the casing comprises the brake connecting shaft, the lower end of the brake connecting shaft is in key connection with a power output shaft of the power source, the upper end of the brake connecting shaft is in splined connection with a central gear of a first-stage planetary gear, a planet carrier of each stage of planetary gear is in splined connection with a central gear of a next-stage planetary gear on the upper part of the planet carrier, the planet carrier of the last-stage planetary gear is in splined connection with an output gear shaft, and the upper end of the output gear shaft is connected with the output gear;
the lower end of the brake connecting shaft is provided with a bearing, the inner ring of the bearing is connected with the brake connecting shaft, and the outer ring of the bearing is connected with the connecting flange;
the upper end of the brake connecting shaft is provided with a framework oil seal for isolating the inner cavity of the brake from the inner cavity of the gear ring;
and a dustproof cover is fixed at the upper end of the bearing seat and is in sealing connection with the output gear shaft.
And a dustproof oil seal is arranged between the dustproof cover and the output gear shaft.
The bearing seat is provided with a plurality of mounting screw holes distributed around the circumference of a symmetrical center line, and a certain eccentric distance is reserved between the symmetrical center line between the mounting screw holes and the central axis of the output gear shaft.
The eccentricity is 1.5 mm.
The brake shell is provided with a brake oil inlet and a brake oil outlet which are communicated with the inner cavity of the friction stator plate and the inner cavity of the friction rotor plate.
And an oil cup is arranged on the bearing seat.
The invention has the beneficial effects that: 1. the inverted working mode of the power input system of the rotary speed reducer below and the power output system above can be realized, and the operation is stable and reliable.
2. The bearing is arranged at the lower end of the brake connecting shaft, so that the brake connecting shaft is prevented from axially moving, and the coaxiality of input and output of the whole speed reducer can be ensured.
3. The framework oil seal for isolating the inner cavity of the brake from the inner cavity of the gear ring is hermetically arranged at the upper end of the brake connecting shaft, so that the two cavities can be isolated, and abrasion particles and other impurities generated by long-term fatigue abrasion of a transmission system are prevented from entering the brake system to cause ablation of a friction plate.
4. The upper end of the bearing seat is provided with the dustproof cover and the dustproof oil seal, so that external silt can be prevented from entering, internal gear oil can be prevented from leaking, and the service life of the speed reducer is effectively prolonged.
5. A certain eccentric distance is arranged between the symmetrical center line between the mounting screw holes and the central axis of the output gear shaft, and the center distance between the output gear of the rotary speed reducer and the rotary supporting gear is adjusted by adjusting the positions of the mounting screw holes, so that the effect of adjusting the meshing gap is achieved, and the adverse effect on the working performance caused by the abrasion of the output gear is reduced.
Drawings
The invention is further illustrated below with reference to the figures and examples.
In fig. 1, a power source, 2, a bearing, 3, a connecting flange, 4, a brake oil discharge port, 5, a piston, 6, an adjusting washer, 7, a friction stator, 8, a friction rotor, 9, a limit retainer ring, 10, a transmission system oil discharge port, 11, a primary sun gear, 12, a primary planet carrier, 13, a gear ring, 14, a secondary planet carrier, 15, a planet wheel bearing i, 16, a secondary planet wheel, 17, a bearing seat, 17-1, a mounting screw hole, 18, an oil level port, 19, a dust cover, 20, a dust-proof oil seal, 21, an output gear, 22, an output gear shaft, 23, a secondary sun gear, 24, a primary planet wheel, 25, a planet wheel bearing ii, 26, a brake housing, 27, a framework oil seal, 28, a brake oil inlet, 29, a spring, 30, a brake connecting shaft, 31 and an oil cup.
Detailed Description
A slewing gear reduction apparatus as shown in the accompanying drawings, comprising: power source 1, brake, speed change mechanism and power take-off mechanism. The power source 1 is arranged at the lower end of the whole machine, the upper part of the power source 1 is connected with the brake, the upper part of the brake is connected with the speed change mechanism, and the upper part of the speed change mechanism is connected with the power output mechanism. The connecting flange 3, the brake shell 26, the gear ring 13 and the bearing seat 17 are rigidly connected into an integral casing from bottom to top.
The power source 1 adopts a hydraulic motor or an electric motor.
The brake mainly comprises a connecting flange 3, a piston 5, an adjusting washer 6, a limiting retainer ring 9, a brake shell 26, a spring 29, a brake connecting shaft 30, a friction stator plate 7 and a friction rotor plate 8, wherein the friction stator plate is provided with an external spline and is connected with the spline in the brake shell 26; when parking braking is needed, high-pressure oil is removed, the piston moves upwards under the action of spring force, the friction moving plate and the friction fixed plate are tightly attached together, and the brake is closed to play a role in parking braking. In order to prevent the friction plate from being ablated under severe conditions of high speed, high temperature, large torque, frequent braking and the like, the brake system adopts wet friction, a brake oil inlet 28 and a brake oil outlet 4 are respectively arranged on the upper part and the lower part of a brake shell 26 and are communicated with inner cavities of a friction stator plate 7 and a friction rotor plate 8, so that the brake system can be normally maintained.
The speed change mechanism is a two-stage planetary gear speed change mechanism, and comprises: the gear ring 13 and the gear ring 13 are provided with a transmission system oil outlet 10; a first-stage planetary gear transmission consisting of a first-stage sun gear 11, a first-stage planet carrier 12 and a first-stage planet gear 24, wherein a planet gear bearing II 25 is arranged between the first-stage planet carrier 12 and the first-stage planet gear 24; and a secondary planet gear transmission consisting of a secondary sun gear 23, a secondary planet carrier 14 and a secondary planet wheel 16 is adopted, and a planet wheel bearing I15 is arranged between the secondary planet carrier 14 and the secondary planet wheel 16.
The power output mechanism comprises a bearing seat 17, an output gear shaft 22 and an output gear 21. The bearing seat 17 is provided with an oil level port 18 and an oil cup 31, so that the oil can be conveniently filled, observed and balanced in and out air pressure.
The transmission system comprises a brake connecting shaft 30, the lower end of the brake connecting shaft 30 is connected with a power output shaft of a power source 1 through a flat key, the upper end of the brake connecting shaft 30 is in splined connection with a primary central gear 11, a primary planet carrier 12 is in splined connection with a secondary central gear 23 on the upper portion of the primary planet carrier, a secondary planet carrier 14 is in splined connection with an output gear shaft 22, and the upper end of the output gear shaft 22 is connected with the output gear 21 through an involute spline.
The power transmission principle of the invention is as follows: the hydraulic motor drives the brake connecting shaft 30 to rotate, the brake connecting shaft 30 drives the primary central gear to synchronously rotate, the primary central gear drives the primary planet gear to rotate, and the gear ring and the host are fixed, so that the primary planet gear rotates around the axis of the primary planet gear and also drives the primary planet carrier to rotate around the central line of the gear ring, namely the axis of the speed reducer, and the primary planet carrier is rigidly connected with the secondary central gear through an involute spline, so that the secondary central gear and the primary planet carrier synchronously rotate around the axis of the speed reducer, the speed is the speed after the primary speed reduction, and the torque is the torque after the primary torque increase; in a similar way, the second grade sun gear drives the rotation of second grade planet wheel, second grade planet wheel is still taking the second grade planet carrier to rotate around the axis of speed reducer except rotating around self axis, the second grade planet carrier carries out rigid connection through involute spline and output gear axle, the rotational speed that finally transmits output gear is the speed after the two-stage speed reduction, the moment of torsion is the moment of torsion after the two-stage increases the turn round, thereby realize by the high-speed low-torque input to the big function of moment of torsion output of low-speed.
Because the primary planet carrier 12 and the secondary central gear 23 are rigidly connected into a whole through an involute spline, the whole is arranged below the output gear shaft and above the primary central gear in a floating way; the first-stage central gear 11 and the brake connecting shaft 30 are rigidly connected into a whole through an involute spline, the whole is arranged below the second-stage central gear in a floating mode, a clearance of 1.5-2 mm is reserved above a motor front cover theoretically, however, in the actual assembly process, because the two whole bodies are not fixed in the axial direction of the speed reducer and are subjected to the action of self gravity, the brake connecting shaft 30 is pushed against the motor front cover to cause interference, the bearing 2 is arranged at the lower end of the brake connecting shaft 30, the bearing 2 is a deep groove ball bearing, the inner ring of the bearing 2 is connected with the brake connecting shaft 30, and the outer ring of the bearing 2 is connected with the connecting flange 3 to prevent the brake connecting shaft 30 from axially shifting and ensure the coaxiality of the input and output connecting shafts of the whole speed reducer.
The framework oil seal 27 for isolating the inner cavity of the brake from the inner cavity of the gear ring is hermetically arranged at the upper end of the brake connecting shaft 30, so that the two cavities can be isolated, and abrasion particles and other impurities generated by long-term fatigue abrasion of a transmission system are prevented from entering the brake system to cause ablation of a friction plate.
And a dust cover 19 is fixed at the upper end of the bearing seat 17, and the dust cover 19 is hermetically connected with the output gear shaft 22. And a dustproof oil seal 20 is arranged between the dustproof cover 19 and the output gear shaft 22. The speed reducer can prevent the invasion of external silt and the leakage of internal gear oil, and effectively prolongs the service life of the speed reducer.
Because of the influence of various accumulated errors in the actual manufacturing and assembling process, the meshing clearance between the output gear and the rotary support during the assembling process can not guarantee the enterprise standard of each host factory, and the meshing clearance can be increased due to the long-term working abrasion of the output gear of the rotary speed reducer and the large gear of the rotary support in the actual use process of a user, so that the rotary working performance of the host is influenced. In order to compensate the problem, a plurality of mounting screw holes 17-1 are formed on the bearing seat 17 and distributed circumferentially around a symmetrical center line, and a certain eccentricity is formed between the symmetrical center line between the mounting screw holes 17-1 and the central axis of the output gear shaft 22. The center distance between the output gear of the rotary speed reducer and the rotary supporting gear is adjusted by adjusting the position of the mounting screw hole, so that the effect of adjusting the meshing gap is achieved. The eccentricity can be set to 1.5 mm.

Claims (6)

1. A slewing gear-reduction apparatus, comprising: power supply (1), mainly by flange (3), piston (5), stopper casing (26), spring (29), braking connecting axle (30), friction stator (7) and the stopper that friction rotor (8) are constituteed, the speed change mechanism who mainly comprises ring gear (13) and multistage planetary gear, and mainly by bearing frame (17), the power take off mechanism that output gear axle (22) and output gear (21) are constituteed, its characterized in that: the power source (1) is arranged at the lower end of the whole machine, the upper part of the power source (1) is connected with the brake, the upper part of the brake is connected with the speed change mechanism, and the upper part of the speed change mechanism is connected with the power output mechanism; the connecting flange (3), the brake shell (26), the gear ring (13) and the bearing seat (17) are rigidly connected into an integral casing from bottom to top, a transmission system in the casing comprises the brake connecting shaft (30), the lower end of the brake connecting shaft (30) is connected with a power output shaft of the power source (1) in a key mode, the upper end of the brake connecting shaft (30) is connected with a central gear of a first-stage planetary gear in a spline mode, a planet carrier of each stage of planetary gear is connected with a central gear of a next-stage planetary gear on the upper portion of the planet carrier in a spline mode, a planet carrier of the last-stage planetary gear is connected with the output gear shaft (22) in a spline mode, and the upper end of the output gear shaft;
the lower end of the brake connecting shaft (30) is provided with a bearing (2), the inner ring of the bearing (2) is connected with the brake connecting shaft (30), and the outer ring of the bearing (2) is connected with the connecting flange (3);
the upper end of the brake connecting shaft (30) is provided with a framework oil seal (27) for isolating the inner cavity of the brake from the inner cavity of the gear ring;
and a dustproof cover (19) is fixed at the upper end of the bearing seat (17), and the dustproof cover (19) is connected with the output gear shaft (22) in a sealing way.
2. The inverted slewing reducer according to claim 1, wherein: and a dustproof oil seal (20) is arranged between the dustproof cover (19) and the output gear shaft (22).
3. The inverted slewing reducer according to claim 1, wherein: the bearing seat (17) is provided with a plurality of mounting screw holes (17-1) distributed around the circumference of a symmetrical center line, and a certain eccentric distance is reserved between the symmetrical center line between the mounting screw holes (17-1) and the central axis of the output gear shaft (22).
4. The inverted slewing reducer according to claim 3, wherein: the eccentricity is 1.5 mm.
5. The inverted slewing reducer according to claim 1, wherein: the brake shell (26) is provided with a brake oil inlet (28) and a brake oil outlet (4) which are communicated with the inner cavities of the friction stator plate (7) and the friction rotor plate (8).
6. The inverted slewing reducer according to claim 1, wherein: an oil cup (31) is arranged on the bearing seat (17).
CN201811048663.5A 2018-09-10 2018-09-10 Inverted rotary speed reducer Withdrawn CN110966359A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811048663.5A CN110966359A (en) 2018-09-10 2018-09-10 Inverted rotary speed reducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811048663.5A CN110966359A (en) 2018-09-10 2018-09-10 Inverted rotary speed reducer

Publications (1)

Publication Number Publication Date
CN110966359A true CN110966359A (en) 2020-04-07

Family

ID=70026481

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811048663.5A Withdrawn CN110966359A (en) 2018-09-10 2018-09-10 Inverted rotary speed reducer

Country Status (1)

Country Link
CN (1) CN110966359A (en)

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Application publication date: 20200407

WW01 Invention patent application withdrawn after publication