CN212744898U - Walking motor speed reducer - Google Patents

Abstract

The utility model relates to a walking motor speed reducer belongs to engineering machine tool technical field. The device comprises an inner gear ring, a steel wire retainer ring, a planetary reduction mechanism, a motor transmission shaft, a buffer spacer bush and an end cover; the structure design is reasonable, the simplicity and compactness, the impact is little, the transmission efficiency is high, the processing is convenient, the single-chip floating oil seal and the sealing ring complex seal structure that adopts, big bearing inner race raceway of speed reducer and ring gear integral type structure, big bearing of speed reducer passes through retaining ring fixed knot and constructs, spacer buffer structure between planetary reduction mechanism and the end cover, end cover steel wire retaining ring fixed knot constructs, when having solved effectively and reducing walking motor speed reducer size space, oil blanket seal structure, the problem that bearing structure is difficult to realize the installation, the one-level planetary reduction mechanism that has solved present walking motor speed reducer generally adopts effectively damages, the problem that the locking nut structure easily becomes flexible and leads to the gear reducer to damage has effectively been solved, thereby the stability of walking motor speed reducer work has been guaranteed, and the.

Description

Walking motor speed reducer

Technical Field

The utility model relates to a walking motor speed reducer belongs to engineering machine tool technical field.

Background

At present, a walking motor reducer commonly used by engineering machinery such as an excavator and the like mostly comprises main parts such as a motor transmission shaft, a sun gear, a primary planetary reduction mechanism, a secondary planetary reduction mechanism, a bearing, a locking nut, a floating oil seal, an inner gear ring, a baffle, an end cover and the like, and the structure has the advantages of low speed and large torque. However, in the micro traveling motor reducer having a reduced space size, it is difficult to realize a common floating oil seal structure, a planetary reduction mechanism, a bearing support structure, and the like because of a small size and a compact size. The technical problems that a common floating oil seal sealing structure, a planetary speed reducing mechanism, a bearing structure and the like are difficult to realize in a small space due to small size and space requirements of the walking motor speed reducer are solved, and the technical problems that a one-level planetary speed reducing mechanism commonly adopted by the walking motor speed reducer is easy to damage and a locking nut structure is easy to loosen to cause the damage of a speed reducer are solved.

Disclosure of Invention

The utility model aims to solve the problem that the sealing structure of the floating oil seal, the planetary reduction gear, the bearing structure and the like in the common speed reducer structure of the walking motor are difficult to realize in a small space; the walking motor reducer generally adopts a primary planetary reducing mechanism which is easy to damage, and a locking nut structure is easy to loosen to cause the technical problem of the damage of the reducer.

In order to solve the above problems, the technical solution of the present invention is to provide a traveling motor reducer, which comprises an inner gear ring, a steel wire retainer ring, a planetary reduction gear, a motor transmission shaft, a buffer spacer and an end cover; the motor speed reducer is provided with a motor transmission shaft, the tail end of the motor transmission shaft is provided with an end cover, and the periphery of the motor transmission shaft is provided with an inner gear ring; the inner cavity of the inner gear ring is provided with a planetary speed reducing mechanism; the motor transmission shaft is connected with an inner gear ring arranged on the periphery of the motor transmission shaft through a planetary reduction mechanism; a steel wire check ring is arranged between the inner gear ring and the end cover; one end of the planetary speed reducing mechanism is connected with a motor transmission shaft, and the other end of the planetary speed reducing mechanism is connected with the end cover through a buffering spacer bush.

Preferably, the planetary reduction mechanism includes a primary planetary reduction mechanism and a secondary planetary reduction mechanism; the primary planet wheel arranged on the primary planet speed reducing mechanism is respectively in external meshing connection with a primary sun wheel gear arranged on the motor transmission shaft and in internal meshing connection with the inner gear ring gear; the primary sun gear and the motor transmission shaft are arranged into an integral connecting structure; the primary planetary reduction mechanism is also connected with a secondary sun gear sleeved on the periphery of the motor transmission shaft; a motor seat is arranged in the inner gear ring, and a secondary planetary reduction mechanism is sleeved on the motor seat; and the secondary planet wheel arranged on the secondary planet speed reducing mechanism is respectively connected with the secondary sun wheel gear in an external meshing way and connected with the inner gear ring gear in an internal meshing way.

Preferably, a sealing ring is arranged at one end part of the inner cavity of the inner gear ring, which is far away from the end cover, a gear is arranged on the inner wall of the inner cavity of the inner gear ring, which is close to the other end of the end cover, and the gear is in inner meshing connection with planet gears arranged on the primary planetary reduction mechanism and the secondary planetary reduction mechanism respectively; and an annular bearing outer ring raceway is arranged on the inner wall of the middle section of the inner cavity of the inner gear ring, and two angular contact bearings which are arranged back to back are arranged in the raceway.

Preferably, the primary planetary reduction mechanism is provided with a planet carrier, the planet carrier is provided with a planet wheel shaft, and the planet wheel shaft is fixedly connected with the planet carrier through an elastic pin; the first-stage planetary gear is connected with the planetary gear shaft through the first needle bearing; the planet wheel shaft is provided with a first gasket for limiting the movement of the planet gear, one side of the first gasket is connected with the planet carrier, and the other side of the first gasket is fixedly connected with a second check ring arranged on the planet wheel shaft.

Preferably, the secondary planetary reduction mechanism is provided with a secondary planetary gear, the secondary planetary gear is sleeved with a second needle bearing, the second needle bearing is connected with a cylindrical boss arranged on the motor base through a shaft sleeve, one end of the end face of the secondary planetary gear is connected with the motor base through a second gasket, and the other end of the end face of the secondary planetary gear is fixedly connected with a third check ring arranged on the motor base through a baffle plate.

Preferably, the second-stage sun gear is spline-connected to the carrier of the first-stage planetary reduction mechanism.

Preferably, the end cover is provided with an inner hole, and a buffer spacer bush is arranged on the inner hole.

Preferably, a single-chip floating oil seal is arranged between the sealing ring and the inner cavity of the groove formed in the motor base.

Preferably, a first O-shaped sealing ring is arranged between the sealing ring and the inner gear ring, and a second O-shaped sealing ring is arranged between the inner gear ring and the end cover.

Preferably, a first retainer ring is arranged between the angular contact bearing and the motor seat.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model has the advantages of reasonable structure, simplicity, compactness, small impact, high stability, high transmission efficiency, low cost and convenient processing, the sealing structure of the single floating oil seal and the sealing ring is adopted, the outer ring raceway and the inner ring of the reducer bearing are designed into an integral structure, the reducer bearing passes through a retaining ring fixing structure, the planet reduction adopts a needle bearing structure, the integral structure of a first-level sun wheel and a motor transmission shaft, a spacer buffer structure between the planet reduction mechanism and an end cover, and an end cover steel wire retaining ring fixing structure, thereby effectively solving the problem that the floating oil seal sealing structure, the planet reduction mechanism and the bearing structure are difficult to realize because the requirement on the size space of the traveling motor reducer is small, and solving the problems that the one-level planet reduction mechanism commonly adopted by the traveling motor reducer is easy to damage, and the reducer is damaged because, thereby ensuring the normal work and stability of the walking motor reducer and having high cost performance.

Drawings

Fig. 1 is a schematic structural view of a walking motor reducer of the present invention;

fig. 2 is a schematic structural view of the one-level planetary reduction mechanism of the present invention.

Fig. 3 is a schematic structural view of the second-stage planetary reduction mechanism of the present invention.

Reference numerals: 1. the floating oil seal comprises a floating oil seal 2, a seal ring 3, a first O-shaped seal ring 4, an angular contact bearing 5, an annular gear 6, a retainer ring I7, a secondary planetary reduction mechanism 8, a secondary sun gear 9, a primary planetary reduction mechanism 10, a second O-shaped seal ring 11, a steel wire retainer ring 12, an end cover 13, a spacer bush 14, a primary sun gear 15, a motor base 16, a motor transmission shaft 7-1, a secondary planet gear 7.2, a needle bearing II 7-3, a shaft sleeve 7-4, a cylindrical boss 7-5, a gasket II 7-6, a baffle plate 7-7, a retainer ring III 9-1, a planet carrier 9-2, a planet gear shaft 9-3, an elastic pin 9-4, a needle bearing I9-5, a primary planet gear 9-6, a gasket I9-7 and a retainer;

Detailed Description

In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings:

as shown in fig. 1-3, the utility model provides a walking motor reducer, which comprises an inner gear ring 5, a steel wire retainer ring 11, a planetary reduction gear, a motor transmission shaft 16, a buffer spacer 13 and an end cover 12; the motor speed reducer is provided with a motor transmission shaft 16, the tail end of the motor transmission shaft 16 is provided with an end cover 12, and the periphery of the motor transmission shaft is provided with an inner gear ring 5; the inner cavity of the inner gear ring 5 is provided with a planetary speed reducing mechanism; the motor transmission shaft 16 is connected with an inner gear ring 5 arranged on the periphery of the motor transmission shaft 16 through a planetary reduction mechanism; a steel wire retainer ring 11 is arranged between the inner gear ring 5 and the end cover 12; one end of the planetary reduction mechanism is connected with a motor transmission shaft 16, and the other end of the planetary reduction mechanism is connected with the end cover 12 through a buffering spacer 13. The planetary reduction mechanism comprises a primary planetary reduction mechanism 9 and a secondary planetary reduction mechanism 7; the primary planet gears 9-5 arranged on the primary planet speed reducing mechanism 9 are respectively in external meshing connection with a primary sun gear 14 arranged on a motor transmission shaft 16 and in internal meshing connection with a gear of the inner gear ring 5; the primary sun gear 14 and the motor transmission shaft 16 are in an integral connection structure; the primary planetary reduction mechanism 9 is also connected with a secondary sun gear 8 sleeved on the periphery of the motor transmission shaft 16; a motor seat 15 is arranged in the inner gear ring 5, and the motor seat 15 is sleeved with a secondary planetary reduction mechanism 7; and a secondary planet wheel 7-1 arranged on the secondary planet speed reducing mechanism 7 is respectively in external meshing connection with a secondary sun wheel gear 8 and in internal meshing connection with an inner gear ring 5. A sealing ring 2 is arranged at one end part of the inner cavity of the inner gear ring 5 far away from the end cover, a gear is arranged on the inner wall of the inner cavity of the inner gear ring near the other end of the end cover 12, and the gear is respectively in inner meshing connection with planet gears arranged on the primary planet speed reducing mechanism 9 and the secondary planet speed reducing mechanism 7; an annular bearing outer ring raceway is arranged on the inner wall of the middle section of the inner cavity of the inner gear ring, and two angular contact bearings 4 which are arranged back to back are arranged in the raceway. The primary planetary reduction mechanism 9 is provided with a planet carrier 9-1, the planet carrier 9-1 is provided with a planet wheel shaft 9-2, and the planet wheel shaft 9-2 is fixedly connected with the planet carrier 9-1 through an elastic pin 9-3; a needle bearing I9-4 is sleeved on the planet wheel shaft 9-2, and the primary planet gear 9-5 is connected with the planet wheel shaft 9-2 through the needle bearing I9-4; the planet wheel shaft 9-2 is provided with a first gasket 9-6 for limiting the movement of the planet gear, one side of the first gasket 9-6 is connected with the planet carrier 9-1, and the other side is fixedly connected with a second check ring 9-7 arranged on the planet wheel shaft 9-2. The secondary planetary reduction mechanism 7 is provided with a secondary planetary gear 7-1, a second needle bearing 7-2 is sleeved on the secondary planetary gear 7-1, the second needle bearing 7-2 is connected with a cylindrical boss 7-4 arranged on the motor base 15 through a shaft sleeve 7-3, one end of the end face of the secondary planetary gear 7-1 is connected with the motor base 15 through a second gasket 7-5, and the other end of the end face of the secondary planetary gear 7-1 is fixedly connected with a third check ring 7-7 arranged on the motor base through a baffle 7-6. The secondary sun gear 8 is in spline connection with a planet carrier 9-1 of the primary planetary reduction mechanism. The end cover 12 is provided with an inner hole, and the inner hole is provided with a buffer spacer 13. A single-chip floating oil seal 1 is arranged between the sealing ring 2 and the groove inner cavity arranged on the motor seat 15. A first O-shaped sealing ring 3 is arranged between the sealing ring 2 and the inner gear ring 5, and a second O-shaped sealing ring 10 is arranged between the inner gear ring 5 and the end cover 12. A first retainer ring 6 is arranged between the angular contact bearing 4 and the motor seat 15.

As shown in fig. 1, the planetary reduction gear comprises an inner gear ring 5, a planetary reduction mechanism is arranged in the inner gear ring 5, the planetary reduction mechanism comprises a primary sun gear 14, a secondary sun gear 8, a primary planetary reduction mechanism 9 and a secondary planetary reduction mechanism 7, a motor transmission shaft and the primary sun gear 14 are of an integral structure, the primary planetary reduction mechanism 9 is respectively externally meshed with the primary sun gear 14 through primary planet gears 9-5 and internally meshed with the inner gear ring 5, the secondary sun gear 8 is in spline connection with a planet carrier of the primary planetary reduction mechanism 9, the secondary planetary reduction mechanism 7 is respectively externally meshed with the secondary sun gear 8 through a secondary planet gear 7-1 and internally meshed with the inner gear ring 5, and a baffle 7-6 of the secondary planetary reduction mechanism 7 is connected with a motor seat 15 through a retainer ring three 7-; one end of the inner cavity of the inner gear ring 5 is provided with a sealing ring 2, the sealing ring 2 is connected with the inner cavity of the groove of the motor seat 15 through a floating oil seal 1, and a first O-shaped sealing ring 3 is arranged between the sealing ring 2 and the inner gear ring 5; two angular contact bearings 4 are arranged in the middle section of the inner cavity of the inner gear ring 5, one angular contact bearing 4 is connected with a bearing shoulder of the motor seat 15, and the other angular contact bearing 4 is connected with the motor seat 15 through a first retainer ring 6; the other end of the inner gear ring 5 is fixedly connected with an end cover 12 through a steel wire retainer ring 11, and a second O-shaped sealing ring 10 is arranged between the inner gear ring 5 and the end cover 12; a spacer bush 13 is arranged in an inner hole of the end cover 12; the primary planet speed reducing mechanism 9 is provided with a planet carrier 9-1, a planet wheel shaft 9-2 is arranged on the planet carrier 9-1, the planet wheel shaft 9-2 is fixedly connected with the planet carrier 9-1 through an elastic pin 9-3, a needle bearing I9-4 is arranged on the planet wheel shaft 9-2, a primary planet wheel 9-5 is connected with the needle bearing I9-4, gaskets I9-6 are arranged at two ends of the primary planet wheel 9-5, a gasket I9-6 at one end is connected with the planet carrier 9-1, and a gasket I9-6 at the other end is fixedly connected with a check ring II 9-7; the secondary planet speed reducing mechanism 7 is provided with a secondary planet wheel 7-1, the secondary planet wheel 7-1 is connected with a needle bearing II 7-2, and the needle bearing II 7-2 is connected with a cylindrical boss 7-4 of the motor base 15 through a shaft sleeve 7-3; one end of the secondary planet wheel 7-1 is connected with the motor seat 15 through a second gasket 7-5, the other end of the secondary planet wheel is connected with a baffle 7-6, and the baffle 7-6 is fixed through a third check ring 7-7.

When the traveling motor speed reducer provided by the utility model works, the rotating motion of the hydraulic motor transmission shaft is transmitted to the primary sun gear 14, the primary planet speed reducing mechanism 9 planet gears 9-5 are in external meshing transmission with the primary sun gear 14, and then the inner gear ring 5 is driven to rotate through the internal meshing with the inner gear ring 5, so that the primary speed reduction of the traveling motor speed reducer of the utility model is realized; one-level planet reduction gears 9 rotates and conveys second grade sun gear 8 through one-level planet carrier spline coupling, and the planet wheel 7-1 and the 8 external gearing transmission of second grade sun gear of second grade planet reduction gears 7, the rethread drives ring gear 5 with the internal gearing of ring gear 5 and rotates, realizes the utility model discloses the second grade of walking motor speed reducer slows down.

The walking motor speed reducer designed by the utility model adopts the matching sealing of the single floating oil seal 1 and the sealing ring 2, when in work, the sealing ring 2 is connected with the inner gear ring 5 to rotate into a movable ring, the floating oil seal 1 is connected with the groove of the inner cavity of the motor seat 15 to form a static ring, and the two rings form a mechanical end face seal for preventing leakage through the matching surfaces of precision grinding; an O-shaped ring of the floating oil seal 1 is matched with a groove of an inner cavity of a motor seat 15, and a first O-shaped sealing ring 3 is arranged between a sealing ring 2 and an inner gear ring 5, so that oil is effectively prevented from leaking from the groove of the inner cavity of the motor seat 15 and the wall of the inner cavity of the inner gear ring 5, and external soil and sand are effectively prevented from entering the motor and the inside of a speed reducer to cause damage and oil leakage; the sealing ring 2 is made of copper alloy material, so that the heat dissipation performance is good, the structural size is obviously reduced, and the weight is lighter. The single-chip floating oil seal 1 and the sealing ring 2 are matched for use, so that the size space and the weight of the speed reducer are effectively reduced.

The two angular contact bearings 4 of the walking motor speed reducer designed by the utility model are arranged back to back, the axial clearance is adjusted and fixed through the first retainer ring 6, the commonly used structure that the axial clearance of the bearing is adjusted by the commonly used locking nut is cancelled, and the bearing capacity is effectively prevented from being reduced until the bearing is damaged due to the loosening of the locking nut; the outer ring raceway of the two angular contact bearings 4 and the inner gear ring 5 are of an integrated structure, so that the size space of the speed reducer is remarkably reduced, and the bearing capacity of the inner gear ring 5 is enhanced; the structure is more compact, the parts are simple, the processing and the installation operation are easy, and the firm and stable structural performance is ensured.

The primary planetary reduction mechanism 9 and the secondary planetary reduction mechanism 7 designed by the utility model are connected by adopting the planetary gear to be matched with the needle bearing, and the needle bearing is connected with the planetary gear shaft 9-2 and the shaft sleeve 7-3 in a matching way; the planet gear shaft 9-2 of the primary planet speed reducing mechanism 9 is matched and connected with the planet carrier 9-1, and is fixed with the structure of the planet gear shaft 9-2 through the elastic pin 9-3, the primary planet gear 9-5 is fixed through the gasket I9-6 and the retainer ring II 9-7 in the axial direction, and the baffle plate 7-6 of the secondary planet speed reducing mechanism 7 is fixed through the retainer ring III 7-7, so that the common elastic pin baffle plate structure of the planet speed reducing mechanism is cancelled, and the damage of the elastic pin, the baffle plate and the needle bearing caused by axial movement is effectively prevented; the planetary reduction mechanism is easy to install and operate, and the structural performance is firm and stable; the spacer 13 between the primary planetary reduction mechanism 9 and the end cover 12 plays a role in buffering, and axial movement and axial impact of the planetary reduction mechanism are effectively reduced.

The utility model discloses a walking motor reducer's end cover 12 adopts steel wire retaining ring 11 fixed, has cancelled the bolt fastening structure commonly used, has reduced speed reducer size space effectively.

The foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the present invention in any way and in any way, and it should be understood that modifications and additions may be made by those skilled in the art without departing from the scope of the present invention. Those skilled in the art can make various changes, modifications and evolutions equivalent to those made by the above-disclosed technical content without departing from the spirit and scope of the present invention, and all such changes, modifications and evolutions are equivalent embodiments of the present invention; meanwhile, any changes, modifications and evolutions of equivalent changes to the above embodiments according to the actual technology of the present invention are also within the scope of the technical solution of the present invention.

Claims (10)

1. A walking motor speed reducer which is characterized in that: the device comprises an inner gear ring, a steel wire retainer ring, a planetary reduction mechanism, a motor transmission shaft, a buffer spacer bush and an end cover; the motor speed reducer is provided with a motor transmission shaft, the tail end of the motor transmission shaft is provided with an end cover, and the periphery of the motor transmission shaft is provided with an inner gear ring; the inner cavity of the inner gear ring is provided with a planetary speed reducing mechanism; the motor transmission shaft is connected with an inner gear ring arranged on the periphery of the motor transmission shaft through a planetary reduction mechanism; a steel wire check ring is arranged between the inner gear ring and the end cover; one end of the planetary speed reducing mechanism is connected with a motor transmission shaft, and the other end of the planetary speed reducing mechanism is connected with the end cover through a buffer spacer bush; and the inner gear ring is provided with an inner gear ring gear.

2. A travel motor reducer as defined in claim 1, wherein: the planetary reduction mechanism comprises a primary planetary reduction mechanism and a secondary planetary reduction mechanism; the primary planet wheel arranged on the primary planet speed reducing mechanism is respectively in external meshing connection with a primary sun wheel gear arranged on the motor transmission shaft and in internal meshing connection with the inner gear ring gear; the primary sun gear and the motor transmission shaft are arranged into an integral connecting structure; the primary planetary reduction mechanism is also connected with a secondary sun gear sleeved on the periphery of the motor transmission shaft; a motor seat is arranged in the inner gear ring, and a secondary planetary reduction mechanism is sleeved on the motor seat; and the secondary planet wheel arranged on the secondary planet speed reducing mechanism is respectively connected with the secondary sun wheel gear in an external meshing way and connected with the inner gear ring gear in an internal meshing way.

3. A travel motor reducer as defined in claim 2, wherein: a sealing ring is arranged at one end part of the inner cavity of the inner gear ring, which is far away from the end cover, a gear is arranged on the inner wall of the inner cavity of the inner gear ring, which is close to the other end of the end cover, and the gear is respectively in inner meshing connection with planet wheels arranged on the primary planet speed reducing mechanism and the secondary planet speed reducing mechanism; and an annular bearing outer ring raceway is arranged on the inner wall of the middle section of the inner cavity of the inner gear ring, and two angular contact bearings which are arranged back to back are arranged in the raceway.

4. A travel motor reducer as defined in claim 3 in which: the primary planetary reduction mechanism is provided with a planetary carrier, a planetary wheel shaft is arranged on the planetary carrier, and the planetary wheel shaft is fixedly connected with the planetary carrier through an elastic pin; the first-stage planetary gear is connected with the planetary gear shaft through the first needle bearing; the planet wheel shaft is provided with a first gasket for limiting the movement of the planet gear, one side of the first gasket is connected with the planet carrier, and the other side of the first gasket is fixedly connected with a second check ring arranged on the planet wheel shaft.

5. A travel motor reducer as defined in claim 4 in which: the secondary planetary reduction mechanism is provided with a secondary planetary gear, a second-stage planetary gear sleeve is provided with a second needle bearing, the second needle bearing is connected with a cylindrical boss arranged on the motor base through a shaft sleeve, one end of the end face of the second-stage planetary gear is connected with the motor base through a second gasket, and the other end of the end face of the second-stage planetary gear is fixedly connected with a third check ring arranged on the motor base through a baffle.

6. A travel motor reducer as defined in claim 5, wherein: and the secondary sun gear is in spline connection with a planet carrier of the primary planetary reduction mechanism.

7. A travel motor reducer as defined in claim 6, wherein: the end cover is provided with an inner hole, and a buffering spacer bush is arranged on the inner hole.

8. A travel motor reducer as defined in claim 7 in which: and a single-chip floating oil seal is arranged between the sealing ring and the inner cavity of the groove formed in the motor seat.

9. A travel motor reducer as defined in claim 8, wherein: a first O-shaped sealing ring is arranged between the sealing ring and the inner gear ring, and a second O-shaped sealing ring is arranged between the inner gear ring and the end cover.

10. A travel motor reducer as defined in claim 8, wherein: a first retainer ring is arranged between the angular contact bearing and the motor seat.

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