CN217056174U - Rotary speed reducer and engineering machinery - Google Patents

Abstract

The utility model provides a rotary speed reducer and engineering machine tool, this rotary speed reducer include casing, output shaft, antifriction bearing and damping buffer gear. Wherein, the output shaft extends from the inside of the shell to the outside of the shell; the rolling bearing is arranged between the output shaft and the shell; the vibration reduction buffer mechanism is arranged between the output shaft and the shell and is abutted against two axial ends of the rolling bearing. When the rotary speed reducer is impacted or vibrates, the rolling bearing can be damped and buffered through the damping and buffering mechanism, especially the influence of axial force on the rolling bearing can be reduced, the rolling bearing is effectively prevented from being damaged, and the defect that the rotary speed reducer in the prior art is easy to cause the damage of parts in the rotary speed reducer is overcome.

Description

Rotary speed reducer and engineering machinery

Technical Field

The utility model relates to a speed reducer technical field, concretely relates to gyration speed reducer and engineering machine tool.

Background

In the excavator operation process, the ratio of the rotation motion exceeds more than 50%. Under severe working conditions such as stone ore excavation, nickel ore excavation and the like, the excavator can bear huge load during rotation, and when the excavator rotates to start and stop, the rotation speed reducer is easily influenced by impact load. In addition, during the slewing operation, the slewing gear reducer is also affected by the vibration of the engine, the rotation of the slewing bearing, and the like, and the slewing gear reducer vibrates.

As a result, when the rotary speed reducer is subjected to a large impact or generates a large vibration, a part of the components inside the rotary speed reducer is damaged by a large external force, particularly an axial force, and the service life of the rotary speed reducer is reduced.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the rotary speed reducer among the prior art and easily leading to the impaired defect of self inside part when receiving impact or vibration to a rotary speed reducer and engineering machine tool are provided.

In order to solve the problem, the utility model provides a rotary speed reducer, it includes casing, output shaft, antifriction bearing and damping buffer gear. Wherein, the output shaft extends from the inside of the shell to the outside of the shell; the rolling bearing is arranged between the output shaft and the shell; the vibration reduction buffer mechanism is arranged between the output shaft and the shell and is abutted against two axial ends of the rolling bearing.

Optionally, the inner cavity of the housing is divided into a first oil chamber distal to the protruding end of the output shaft and a second oil chamber proximal to the protruding end of the output shaft, the rolling bearings comprise a first rolling bearing disposed in the first oil chamber and a second rolling bearing disposed in the second oil chamber; the vibration reduction buffer mechanism comprises a first vibration reduction buffer mechanism and a second vibration reduction buffer mechanism, the first vibration reduction buffer mechanism is abutted to the two axial ends of the first rolling bearing, and the second vibration reduction buffer mechanism is abutted to the two axial ends of the second rolling bearing.

Optionally, the first vibration damping buffer mechanism includes a first vibration damping buffer member and a second vibration damping buffer member, the first vibration damping buffer member abuts against an outer ring of one axial end of the first rolling bearing, and the second vibration damping buffer member abuts against an inner ring of the other axial end of the first rolling bearing.

Optionally, the first vibration reduction buffer is arranged as a first plastic ring with an L-shaped cross section, and the first plastic ring is clamped and sleeved at an outer corner of one side of an outer ring of the first rolling bearing; the second vibration reduction buffer piece is arranged as a first elastic ring which is sleeved on the output shaft and is abutted against one side, back to the first plastic ring, of the inner ring of the first rolling bearing.

Optionally, the second vibration damping and cushioning mechanism includes a third vibration damping and cushioning member abutting against an outer ring of one axial end of the second rolling bearing, and a fourth vibration damping and cushioning member abutting against an inner ring of the other axial end of the second rolling bearing.

Optionally, the third vibration reduction buffer is arranged to be a second plastic ring with an L-shaped cross section, and the second plastic ring is clamped and sleeved at an outer corner of one side of an outer ring of the second rolling bearing; the fourth vibration reduction buffer piece is arranged as a second elastic ring which is sleeved on the output shaft and is abutted against one side, back to the second plastic ring, of the inner ring of the second rolling bearing.

Optionally, a second elastic ring is provided between a portion of the output shaft protruding out of the housing and the second rolling bearing, and blocks the second oil chamber from the outside of the housing.

Optionally, a mounting flange is arranged on the housing and used for connecting an external structure; the rotary speed reducer further comprises an elastic pad, and the elastic pad is arranged on one side, facing the output shaft, of the mounting flange.

Optionally, the rotary reduction gear further comprises a planetary reduction mechanism. The planetary reduction mechanism is arranged in the shell and is in transmission connection with the output shaft, the planetary reduction mechanism comprises a planetary carrier, a planetary wheel shaft and an elastic pin, and the planetary wheel shaft is fixed on the planetary carrier through the elastic pin.

The utility model also provides an engineering machine tool, it includes as above rotary reducer.

The utility model has the advantages of it is following:

1. through set up damping buffer gear between casing and output shaft to make damping buffer gear and antifriction bearing's axial both ends butt, can carry out damping and buffering to antifriction bearing through damping buffer gear, especially reduce the influence of axial force to antifriction bearing, effectively avoid antifriction bearing impaired.

2. The first rolling bearing installed in the first oil cavity can be damped and buffered through the first damping and buffering mechanism, and the second rolling bearing installed in the second oil cavity can be damped and buffered through the second damping and buffering mechanism.

3. The outer ring and the inner ring of the first rolling bearing can be simultaneously damped and buffered through the first damping buffer part and the second damping buffer part, and the damping buffering effect is better.

4. The outer ring and the inner ring of the second rolling bearing can be simultaneously damped and buffered through the third damping buffer part and the fourth damping buffer part, and the damping buffering effect is better.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 shows an overall cross-sectional structural schematic diagram of a rotary speed reducer provided by an embodiment of the present invention;

fig. 2 shows a schematic cross-sectional structural diagram of a primary planetary reduction mechanism in a rotary speed reducer provided by an embodiment of the present invention;

fig. 3 shows a schematic cross-sectional structure diagram of a two-stage planetary reduction mechanism in a rotary speed reducer provided by the embodiment of the present invention.

Description of the reference numerals:

10. a housing; 11. a first oil chamber; 12. a second oil chamber; 13. a bearing seat; 131. installing a flange; 14. a ring gear; 15. an end cap; 16. a bolt; 20. an output shaft; 21. an outer gear; 22. a shaft shoulder; 30. a rolling bearing; 31. a first rolling bearing; 32. a second rolling bearing; 40. a vibration damping buffer mechanism; 41. a first vibration damping buffer mechanism; 411. a first vibration damping cushion; 412. a second vibration-damping cushion; 42. a second vibration damping buffer mechanism; 421. a third vibration damping cushion; 422. a fourth vibration damping cushion; 50. an elastic pad; 60. a primary sun gear; 70. a primary planetary reduction mechanism; 71. a primary planet carrier; 72. a primary planet wheel shaft; 73. a primary planet wheel; 74. a first elastic pin; 75. a needle bearing; 76. a first gasket; 77. a baffle plate; 80. a secondary sun gear; 90. a secondary planetary reduction mechanism; 91. a secondary planet carrier; 92. a secondary planet wheel shaft; 93. a secondary planet wheel; 94. a second elastic pin; 95. a sliding bearing; 96. a second gasket; 100. a framework oil seal; 110. and a clamp spring.

Detailed Description

The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood 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 efforts all belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1, the present embodiment provides a rotary reduction machine including a housing 10, an output shaft 20, a rolling bearing 30, and a vibration damping buffer mechanism 40. Wherein, the output shaft 20 extends from the inside of the casing 10 to the outside of the casing 10; the rolling bearing 30 is provided between the output shaft 20 and the housing 10; the vibration damping and buffering mechanism 40 is provided between the output shaft 20 and the housing 10, and abuts against both ends of the rolling bearing 30 in the axial direction.

According to the arrangement, when the rotary speed reducer is subjected to large impact or generates large vibration, the vibration reduction and buffering mechanism 40 can be used for reducing vibration and buffering of the rolling bearing 30, particularly reducing the influence of axial force generated by the impact or vibration of the rotary speed reducer on the rolling bearing 30, effectively avoiding the rolling bearing 30 from being damaged and prolonging the service life of the rolling bearing 30.

In this embodiment, the housing 10 includes a bearing housing 13, a ring gear 14, and an end cover 15, which are arranged in this order in the axial direction. The rotary speed reducer is also provided with a bolt 16, and the bearing seat 13, the gear ring 14 and the end cover 15 are fixedly connected through the bolt 16. The end face of the ring gear 14 opposite to the end cover 15 and the end face of the housing 10 opposite to the ring gear 14 are also coated with a sealant, so that O-rings are not required for sealing when the ring gear 14 and the end cover 15 are connected and the housing 10 and the ring gear 14 are connected.

Further, referring to fig. 1, the inner cavity of the housing 10 is partitioned into a first oil chamber 11 distant from the protruding end of the output shaft 20 and a second oil chamber 12 near the protruding end of the output shaft 20. In the present embodiment, the rotary reduction machine further includes a skeleton oil seal 100, and the skeleton oil seal 100 is provided between the housing 10 and the output shaft 20 to divide an inner cavity of the housing 10 into the first oil chamber 11 and the second oil chamber 12.

The rolling bearing 30 includes a first rolling bearing 31 and a second rolling bearing 32, the first rolling bearing 31 being disposed in the first oil chamber 11, the second rolling bearing 32 being disposed in the second oil chamber 12. Accordingly, the vibration damping and cushioning mechanism 40 includes a first vibration damping and cushioning mechanism 41 and a second vibration damping and cushioning mechanism 42. The first vibration reduction and buffering mechanism 41 is abutted against two axial ends of the first rolling bearing 31 so as to reduce vibration and buffer the first rolling bearing 31; the second vibration damping and buffering mechanism 42 abuts against both ends of the second rolling bearing 32 in the axial direction to damp and buffer the second rolling bearing 32.

In the present embodiment, both the first rolling bearing 31 and the second rolling bearing 32 are mounted in the bearing housing 13, and both are double-row self-aligning roller bearings. Taking the first rolling bearing 31 as an example, it includes an outer ring having a spherical raceway, an inner ring, and a drum roller with a cage.

Next, the arrangement of the first vibration damping and damping mechanism 41 and the second vibration damping and damping mechanism 42 will be further described.

As shown in fig. 1, the first vibration damper mechanism 41 includes a first vibration damper 411 and a second vibration damper 412. The first damper cushion 411 abuts against the outer ring of one axial end of the first rolling bearing 31, and the second damper cushion 412 abuts against the inner ring of the other axial end of the first rolling bearing 31. Therefore, the outer ring and the inner ring of the first rolling bearing 31 can be simultaneously damped and buffered, and the damping and buffering effects are better.

Further, the first damping cushion 411 is provided as a first plastic ring having an L-shaped cross section, and the first plastic ring is fitted around an outer corner of the first rolling bearing 31 on the outer ring side. At this time, the first plastic ring can support the first rolling bearing 31 more firmly, and absorb a certain amount of energy, thereby playing a role of vibration damping and buffering. The second vibration damper 412 is configured as a first elastic ring, which is fitted around the output shaft 20 and abuts against the side of the inner ring of the first rolling bearing 31 facing away from the first plastic ring. At this time, the first elastic ring can provide larger elastic force, and plays better roles in damping and buffering. In this embodiment, the first elastic ring is a damping ring.

Preferably, referring to fig. 1, the first vibration damper 411 is fitted around an outer corner of a lower end of the outer ring of the first rolling bearing 31. Still be provided with first L shape inslot in casing 10, first damping bolster 411 joint is in first L shape inslot, and the structure is firm and compact. The second shock absorbing member 412 abuts against an upper end of the inner ring of the first rolling bearing 31.

In consideration of the problem of installation and fixation of the second vibration damper 412, referring to fig. 1 again, a clamp spring 110 is further disposed in the slewing speed reducer, and the clamp spring 110 is sleeved on the output shaft 20 and disposed on a side of the second vibration damper 412 facing away from the first rolling bearing 31 to limit the second vibration damper 412. In this embodiment, a clamp spring groove is further provided on the output shaft 20, and the clamp spring 110 is installed in the clamp spring groove.

In terms of specific materials, both the first damping bumper 411 and the second damping bumper 412 may be made of engineering plastics. The engineering plastic can be phenolic resin, high-temperature resistant nylon or polyarylsulfone and other high-temperature resistant engineering plastics with viscoelastic characteristics, and has certain elasticity and enough hardness, the working temperature can reach more than 120 ℃, and the compressive strength can reach more than 130 MPa.

As shown in fig. 1, the second vibration damper mechanism 42 includes a third vibration damper 421 and a fourth vibration damper 422. The third vibration damper 421 abuts against the outer ring of one axial end of the second rolling bearing 32, and the fourth vibration damper 422 abuts against the inner ring of the other axial end of the second rolling bearing 32. Therefore, the outer ring and the inner ring of the second rolling bearing 32 can be simultaneously damped and buffered, and the damping and buffering effects are better.

Further, the third vibration damper 421 is provided as a second plastic ring having an L-shaped cross section, and the second plastic ring is fitted around an outer corner of the second rolling bearing 32 on the outer ring side. At this time, the second plastic ring can support the second rolling bearing 32 more firmly, and absorb a certain amount of energy, thereby playing a role of vibration damping and buffering. The fourth vibration damper 422 is configured as a second elastic ring which is sleeved on the output shaft 20 and abuts against a side of the inner ring of the second rolling bearing 32 facing away from the second plastic ring. At this time, the second elastic ring can provide larger elastic force, and plays better roles of vibration reduction and buffering.

Preferably, referring to fig. 1, the third shock absorbing bumper 421 is fitted around an outer corner of an upper end of an outer ring of the second rolling bearing 32. A second L-shaped groove is further formed in the housing 10, and the third vibration damping cushion 421 is clamped in the second L-shaped groove, so that the structure is stable and compact. The fourth damper cushion 422 abuts against the lower end of the inner ring of the second rolling bearing 32.

Further, a fourth vibration damper 422 is provided between the portion of the output shaft 20 protruding out of the housing 10 and the second rolling bearing 32, and blocks the second oil chamber 12 from the outside of the housing 10. With this arrangement, it is possible to prevent both the grease inside the second oil chamber 12 from running off and to prevent foreign matters such as dust from entering the second oil chamber 12 from the outside, thereby ensuring the cleanliness inside the second oil chamber 12.

In the present embodiment, referring to fig. 1, a lower opening in the second oil chamber 12 is provided, and a second rolling bearing 32 is mounted at this opening. In the radial direction of the second rolling bearing 32, the fourth vibration damper 422 extends from the inner ring of the second rolling bearing 32 to be in close contact with the housing 10 to completely cover this opening, isolating the second oil chamber 12 from the outside of the housing 10.

Referring to fig. 1, the portion of the output shaft 20 extending out of the housing 10 includes an external gear 21 and a shoulder 22 disposed from the outside to the inside. The external gear 21 is used for being meshed with a rotary support of the engineering machinery to which the rotary speed reducer belongs to achieve power transmission. The shoulder 22 is then used to cooperate with the inner ring of the second rolling bearing 32 to fix the fourth shock absorber 422.

In the present embodiment, a step structure is further formed at the shoulder 22, and the step structure includes, for example, a first step surface located relatively above and a second step surface located relatively below, a portion of the lower end surface of the inner ring of the second rolling bearing 32 abuts against the first step surface, and both sides of the fourth vibration damping cushion 422 abut against the second step surface and another portion of the lower end surface of the inner ring of the second rolling bearing 32, respectively, in the direction shown in fig. 1. When the output shaft 20 rotates, the fourth damper bumper 422 rotates with the rotation of the output shaft 20.

In terms of specific materials, the core of the fourth vibration-damping cushion 422 is a steel plate, so as to facilitate shaping; the surface of the steel plate is covered with rubber to ensure the sealing effect, and the thickness of the rubber is 0.5 +/-0.3 mm.

Next, other important arrangements in the slewing gear reducer will be described.

As shown in fig. 1, a mounting flange 131 is provided on the bearing housing 13, and the mounting flange 131 is used for connecting to an external structure. The rotary reduction gear further includes an elastic pad 50, and the elastic pad 50 is disposed on a side of the mounting flange 131 facing the output shaft 20. Therefore, when the rotary speed reducer is connected with an external structure through the mounting flange 131, the elastic pad 50 can be used for damping and buffering the whole rotary speed reducer, especially, the influence of external axial force can be reduced, and internal parts of the rotary speed reducer can be better protected.

In this embodiment, the elastic pad 50 is a circular ring-shaped elastic rubber pad made of a sticky elastic material such as nitrile rubber. The resilient pads 50 are also provided with through holes that are sized and sized to correspond to the mounting holes in the mounting flange 131 and the reference circle to facilitate mounting of the flange fasteners.

As shown in fig. 1, the rotary reduction gear further includes a planetary reduction mechanism disposed within the ring gear 14 and drivingly connected to the output shaft 20. The planetary reduction mechanism comprises a planetary carrier, a planetary wheel shaft and an elastic pin, and the planetary wheel shaft is fixed on the planetary carrier through the elastic pin. Therefore, the bearing capacity of the elastic pin is larger, so that the vibration reduction and impact resistance of the planetary speed reducing mechanism can be improved compared with the traditional design that a common split pin is used.

In the embodiment, the elastic pin is an elastic rolling pin, and the bearing capacity of the elastic pin can be improved by about 20% compared with that of a common split pin. In other aspects, the opening of the resilient rolled pin is flush with the axis when assembled.

Further, referring to fig. 1 to 3, a primary sun gear 60 and a secondary sun gear 80 are provided in the rotary reduction gear, and the planetary reduction mechanism includes a primary planetary reduction mechanism 70 and a secondary planetary reduction mechanism 90. The elastic pins include a first elastic pin 74 and a second elastic pin 94, which are used in the primary planetary reduction mechanism 70 and the secondary planetary reduction mechanism 90, respectively.

In particular, as shown in fig. 1, the primary planetary reduction mechanism 70 includes a primary carrier 71, a primary planetary gear shaft 72, a primary planetary gear 73, a first elastic pin 74, a needle bearing 75, a first spacer 76, and a baffle plate 77. The primary planet shaft 72 is mounted on the primary planet carrier 71, and the primary planet wheel 73 is connected with the primary planet shaft 72 through a needle bearing 75. First spacers 76 are provided between both axial sides of the primary planet gear 73 and the primary planet carrier 71. A baffle plate 77 is provided in the upper region of the splines in the primary planet carrier 71 for wear of the primary sun gear 60.

The secondary planetary reduction mechanism 90 includes a secondary planet carrier 91, a secondary planet shaft 92, a secondary planet 93, a second elastic pin 94, a sliding bearing 95, and a second spacer 96. The secondary planet wheel shaft 92 is mounted on the secondary planet carrier 91, and the secondary planet wheel 93 is connected with the secondary planet wheel shaft 92 through a sliding bearing 95. A second spacer 96 is provided between the secondary planet carrier 91 and the lower side of the secondary planet wheel 93.

The integral connection is arranged, the primary planet wheel 73 is in external gear meshing connection with the primary sun wheel 60, and the primary planet wheel 73 is also in internal gear meshing connection with the gear ring 14; the primary planet carrier 71 is meshed with the secondary sun gear 80, the secondary planet gear 93 is meshed with the gear ring 14, and the secondary planet carrier 91 is in splined connection with the output shaft 20.

The whole transmission process of the rotary speed reducer is as follows: the power source of the rotary speed reducer drives the primary sun gear 60 to rotate, and further drives the primary planet gear 73 to rotate; the primary planet gear 73 drives the primary planet carrier 71 to revolve around the central axis of the rotary speed reducer in addition to rotating around the primary planet gear shaft 72; the primary planet carrier 71 drives the secondary sun gear 80 to rotate, and the secondary sun gear 80 drives the secondary planet gear 93 to rotate; the secondary planet gears 93 rotate around the secondary planet gear shafts 92 and drive the secondary planet carrier 91 to revolve around the central axis of the rotary speed reducer; the secondary planet carrier 91 drives the output shaft 20 to rotate, so that power output is realized.

In other aspects, the lubrication of the rotary speed reducer is provided as follows: the first oil chamber 11 is a gear oil chamber, and gear oil is contained therein, and can lubricate the primary sun gear 60, the primary planetary reduction mechanism 70, the secondary sun gear 80, the secondary planetary reduction mechanism 90, the gear ring 14, the first rolling bearing 31 and the like; the second oil chamber 12 is a grease chamber, and 80% of grease needs to be initially injected therein, and more than 50% of grease needs to be injected into the remaining space inside the second rolling bearing 32, and the added grease is extreme pressure type lithium-based grease or other extreme pressure type grease.

The embodiment also provides the engineering machinery, which comprises the rotary speed reducer. Specifically, the construction machine may be a micro-excavator, a crane, a pump truck, or the like.

According to the above description, the present application has the following advantages:

1. through the arrangement of the first vibration reduction buffer mechanism 41, the second vibration reduction buffer mechanism 42 and the elastic pad 50, when the rotary speed reducer is subjected to large impact or generates large vibration, vibration reduction and buffering of internal parts of the rotary speed reducer can be realized, especially, the influence of axial force on the internal parts is reduced, and the service life of the internal parts is prolonged.

2. By using the first elastic pin 74 in the primary planetary reduction mechanism 70 and the second elastic pin 94 in the secondary planetary reduction mechanism 90, the influence of shearing force can be effectively reduced, and the vibration-damping and impact-resisting performance of the planetary reduction mechanism can be improved.

3. Both can carry out the damping buffering to the second bearing through fourth damping bolster 422, can seal up casing 10 again, avoid the inside lubricating grease of casing 10 to run off, or avoid impurity such as outside dust to get into in casing 10, guarantee the inside cleanliness of casing 10.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (10)

1. A slewing reducer is characterized by comprising:

a housing (10);

an output shaft (20) extending from the inside of the housing (10) to the outside of the housing (10);

a rolling bearing (30) provided between the output shaft (20) and the housing (10);

and a vibration-damping buffer mechanism (40) which is provided between the output shaft (20) and the housing (10) and which abuts against both axial ends of the rolling bearing (30).

2. The rotary reduction machine according to claim 1, wherein an inner cavity of the housing (10) is partitioned into a first oil chamber (11) distant from an extended end of the output shaft (20) and a second oil chamber (12) close to the extended end of the output shaft (20), the rolling bearing (30) includes a first rolling bearing (31) and a second rolling bearing (32), the first rolling bearing (31) is disposed within the first oil chamber (11), the second rolling bearing (32) is disposed within the second oil chamber (12);

the vibration reduction buffering mechanism (40) comprises a first vibration reduction buffering mechanism (41) and a second vibration reduction buffering mechanism (42), the first vibration reduction buffering mechanism (41) is abutted to the two axial ends of the first rolling bearing (31), and the second vibration reduction buffering mechanism (42) is abutted to the two axial ends of the second rolling bearing (32).

3. The reduction gear according to claim 2, wherein the first damper cushion mechanism (41) includes a first damper cushion member (411) and a second damper cushion member (412), the first damper cushion member (411) being in abutment with an outer ring of one axial end of the first rolling bearing (31), and the second damper cushion member (412) being in abutment with an inner ring of the other axial end of the first rolling bearing (31).

4. A slewing reducer according to claim 3, characterised in that the first shock-absorbing bumper (411) is provided as a first plastic ring with an L-shaped cross-section, which is snapped onto an outer corner of the first rolling bearing (31) on the side of the outer ring;

the second vibration-damping and buffering piece (412) is arranged to be a first elastic ring, the first elastic ring is sleeved on the output shaft (20) and is abutted against one side, back to the first plastic ring, of the inner ring of the first rolling bearing (31).

5. The slewing reducer according to claim 2, wherein the second vibration damping and buffering mechanism (42) includes a third vibration damping and buffering member (421) and a fourth vibration damping and buffering member (422), the third vibration damping and buffering member (421) abuts against an outer ring of one axial end of the second rolling bearing (32), and the fourth vibration damping and buffering member (422) abuts against an inner ring of the other axial end of the second rolling bearing (32).

6. The slewing reducer according to claim 5, characterized in that the third shock absorbing bumper (421) is provided as a second plastic ring having an L-shaped cross section, which is fitted around an outer corner of the second rolling bearing (32) on the outer ring side;

the fourth vibration reduction buffer piece (422) is arranged to be a second elastic ring, the second elastic ring is sleeved on the output shaft (20) and is abutted to one side, back to the second plastic ring, of the inner ring of the second rolling bearing (32).

7. The rotary reduction machine according to claim 6, characterized in that the second elastic ring is provided between the portion of the output shaft (20) protruding out of the housing (10) and the second rolling bearing (32), and blocks the second oil chamber (12) from the outside of the housing (10).

8. The rotary reducer according to any one of claims 1-7, wherein a mounting flange (131) is arranged on the housing (10), and the mounting flange (131) is used for connecting an external structure;

the rotary speed reducer further comprises an elastic pad (50), wherein the elastic pad (50) is arranged on one side, facing the output shaft (20), of the mounting flange (131).

9. The rotary reduction machine according to any one of claims 1 to 7, further comprising:

the planetary speed reducing mechanism is arranged in the shell (10) and is in transmission connection with the output shaft (20), the planetary speed reducing mechanism comprises a planetary carrier, a planetary wheel shaft and an elastic pin, and the planetary wheel shaft is fixed on the planetary carrier through the elastic pin.

10. A construction machine comprising a slewing reducer as defined in any one of claims 1-9.

Images