CN220286324U - Rotary speed reducer and working machine - Google Patents
Rotary speed reducer and working machine Download PDFInfo
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- CN220286324U CN220286324U CN202321908790.4U CN202321908790U CN220286324U CN 220286324 U CN220286324 U CN 220286324U CN 202321908790 U CN202321908790 U CN 202321908790U CN 220286324 U CN220286324 U CN 220286324U
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- output shaft
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- speed reducer
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 49
- 230000009467 reduction Effects 0.000 claims abstract description 23
- 238000005096 rolling process Methods 0.000 claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 239000003921 oil Substances 0.000 description 21
- 230000008901 benefit Effects 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- 238000013016 damping Methods 0.000 description 4
- 230000003993 interaction Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000012208 gear oil Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of engineering machinery, and provides a rotary speed reducer and an operation machine, wherein the rotary speed reducer comprises a shell, an output shaft and a bearing assembly, and a planetary speed reducing mechanism is arranged in the shell; the first end of the output shaft extends into the shell and is in transmission connection with the output end of the planetary reduction mechanism, and the second end of the output shaft extends to the outside of the shell; the bearing assembly comprises two aligning bearings, the two aligning bearings are arranged between the output shaft and the shell and distributed at intervals along the axis direction of the output shaft, at least one of the two aligning bearings comprises a first inner ring, a middle ring, a first outer ring and rolling bodies, the first inner ring is relatively fixed with the output shaft, the first outer ring is relatively fixed with the shell, the rolling bodies are arranged between the first inner ring and the middle ring, and the middle ring is matched with the spherical surface of the first outer ring. The problem that the bearing is easy to damage when the rotary speed reducer in the prior art is applied to a large excavator due to the fact that the bearing capacity of the bearing is small is solved.
Description
Technical Field
The utility model relates to the technical field of engineering machinery, in particular to a rotary speed reducer and a working machine.
Background
The slewing mechanism is used as key equipment of engineering machinery such as an excavator, plays a crucial role in the reliability of the whole work, and generally consists of a slewing bearing, a slewing reducer and a hydraulic motor.
In the prior art, two double-row self-aligning roller bearings are generally arranged between an output shaft and a shell, and the two double-row self-aligning roller bearings have relatively small radial bearing capacity although simple in installation structure, and are generally only suitable for occasions with low requirements on using working conditions such as automobile cranes, crawler cranes and the like. For the excavator, especially for the large-scale excavator, the working condition is bad, the load is far higher than the load of the equipment such as the automobile crane, the crawler crane and the like, and the overload operation of the rotary speed reducer leads to the easy occurrence of bearing damage faults of the rotary speed reducer, thereby causing great loss.
Therefore, how to solve the problem that the bearing damage fault easily occurs when the rotary speed reducer is applied to a large excavator due to the small bearing capacity of the bearing in the prior art is an important technical problem to be solved by the person skilled in the art.
Disclosure of Invention
The utility model provides a rotary speed reducer and a working machine, which are used for solving the defect that the rotary speed reducer in the prior art is easy to cause bearing damage faults when being applied to a large excavator due to smaller bearing capacity of a bearing.
The present utility model provides a rotary speed reducer, comprising:
a planetary reduction mechanism is arranged in the shell;
the first end of the output shaft extends into the shell and is in transmission connection with the output end of the planetary reduction mechanism, and the second end of the output shaft extends to the outside of the shell;
the bearing assembly comprises two self-aligning bearings, wherein the two self-aligning bearings are arranged between the output shaft and the shell and are distributed along the axis direction of the output shaft at intervals, at least one of the two self-aligning bearings comprises a first inner ring, a middle ring, a first outer ring and rolling bodies, the first inner ring is relatively fixed with the output shaft, the first outer ring is relatively fixed with the shell, the rolling bodies are arranged between the first inner ring and the middle ring, and the middle ring is in spherical fit with the first outer ring.
According to the rotary speed reducer provided by the utility model, the rolling bodies comprise a plurality of cylindrical rollers, the axes of the cylindrical rollers are parallel to the axis of the first inner ring, and the cylindrical rollers are uniformly distributed along the circumferential direction of the first inner ring.
According to the rotary speed reducer provided by the utility model, the rolling bodies comprise a plurality of rolling pins, the axes of the rolling pins are parallel to the axis of the first inner ring, and the rolling pins are uniformly distributed along the circumferential direction of the first inner ring.
According to the rotary speed reducer provided by the utility model, one of the two self-aligning bearings, which is close to the first end of the output shaft, is a first self-aligning bearing, and the other is a second self-aligning bearing;
the first self-aligning bearing comprises the middle ring, and the second self-aligning bearing is a double-row self-aligning roller bearing.
According to the rotary speed reducer provided by the utility model, the inner wall of the shell is provided with the first limiting step, one end of the first outer ring, which is close to the second aligning bearing, is propped against the first limiting step, and one end of the first inner ring, which is far away from the second aligning bearing, is provided with the limiting check ring.
According to the rotary speed reducer provided by the utility model, the second limiting step is arranged on the inner wall of the shell, the second aligning bearing comprises a second inner ring, a second outer ring and two rows of spherical rollers, one end, close to the first aligning bearing, of the second outer ring is propped against the second limiting step, the output shaft is provided with a third limiting step, and the second inner ring is propped against the third limiting step.
According to the rotary speed reducer provided by the utility model, the vibration reduction plate is arranged on one side, far away from the first aligning bearing, of the second aligning bearing, the vibration reduction plate is sleeved on the output shaft, the fourth limiting step is arranged on the output shaft, the inner edge of the vibration reduction plate is embedded between the second inner ring and the fourth limiting step, and the outer edge of the vibration reduction plate extends to the end face of the shell.
According to the rotary speed reducer provided by the utility model, the framework oil seal is arranged between the shell and the output shaft, the framework oil seal divides the inner cavity of the shell into the first oil cavity and the second oil cavity, and the two aligning bearings are respectively positioned at two sides of the framework oil seal.
According to the rotary speed reducer provided by the utility model, the connecting flange used for being connected with the frame is arranged on the outer side wall of the shell, and the second end of the output shaft is provided with the gear used for meshing transmission with the slewing bearing.
The utility model also provides a working machine comprising the rotary speed reducer.
The utility model provides a rotary speed reducer, which comprises a shell, an output shaft and a bearing assembly, wherein a planetary speed reducing mechanism is arranged in the shell, a first end of the output shaft extends into the shell and is in transmission connection with an output end of the planetary speed reducing mechanism, and a second end of the output shaft extends to the outside of the shell and is in transmission connection with a slewing bearing. The bearing assembly comprises two self-aligning bearings which are arranged between the output shaft and the shell and are distributed at intervals along the axis direction of the output shaft. At least one of the two aligning bearings comprises a first inner ring, a middle ring, a first outer ring and rolling bodies, wherein the first inner ring is relatively fixed with the output shaft, and the first outer ring is relatively fixed with the shell. The rolling body is arranged between the first inner ring and the middle ring, so that the middle ring can rotate relative to the first inner ring, and the friction force between the middle ring and the first inner ring is rolling friction, so that the abrasion to the middle ring and the first inner ring can be reduced. The middle ring is matched with the spherical surface of the first outer ring, the center of the output shaft can be adjusted through the matching of the middle ring and the first outer ring, and the radial load and the axial load transmitted to the output shaft can be borne. So set up, above-mentioned aligning bearing with center ring can realize the relative rotation of first inner circle and first outer lane, can realize the aligning to the output shaft again, for the biserial aligning roller bearing among the prior art, increased the contact area of bearing, bearing capacity is higher, when being applied to large-scale excavator with the gyration speed reducer that installs above-mentioned aligning bearing with center ring, can reduce aligning bearing's damage trouble, have long service life's advantage, solved the problem that the gyration speed reducer appears the bearing easily when being applied to large-scale excavator because of bearing capacity is less among the prior art and damage the trouble.
Further, the work machine according to the present utility model includes the above-described swing speed reducer, and thus has various advantages as described above.
Drawings
In order to more clearly illustrate the utility model or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the internal structure of a swing speed reducer provided by the utility model;
fig. 2 is an enlarged view of I in fig. 1.
Reference numerals:
1. a housing; 2. a planetary reduction mechanism; 3. an output shaft; 4. a first inner ring; 5. a middle ring; 6. a first outer race; 7. a rolling element; 8. a first aligning bearing; 9. a second aligning bearing; 10. a limit retainer ring; 11. a vibration damping plate; 12. a framework oil seal; 13. a first oil chamber; 14. a second oil chamber; 15. a connecting flange; 16. a gear.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The slewing gear reducer of the present utility model is described below with reference to fig. 1 to 2.
As shown in fig. 1 to 2, the rotary speed reducer provided by the embodiment of the utility model comprises a housing 1, an output shaft 3 and a bearing assembly.
Specifically, a planetary reduction mechanism 2 is disposed inside the casing 1, a first end of an output shaft 3 extends into the casing 1 and is in driving connection with an output end of the planetary reduction mechanism 2, and a second end of the output shaft 3 extends to the outside of the casing 1 for driving connection with a slewing bearing.
The bearing assembly comprises two self-aligning bearings which are arranged between the output shaft 3 and the shell 1 and are distributed at intervals along the axis direction of the output shaft 3.
At least one of the two self-aligning bearings comprises a first inner ring 4, a middle ring 5, a first outer ring 6 and rolling bodies 7, wherein the first inner ring 4 is relatively fixed with the output shaft 3, and the first outer ring 6 is relatively fixed with the housing 1.
The rolling elements 7 are disposed between the first inner ring 4 and the intermediate ring 5, so that the intermediate ring 5 can rotate relative to the first inner ring 4, and friction between the intermediate ring 5 and the first inner ring 4 is rolling friction, so that abrasion to the intermediate ring 5 and the first inner ring 4 can be reduced.
The middle ring 5 is in spherical fit with the first outer ring 6, and the center of the output shaft 3 can be adjusted through the fit of the middle ring 5 and the first outer ring 6, and radial load and axial load transmitted to the output shaft 3 can be borne.
So set up, above-mentioned aligning bearing with center ring 5 can realize the relative rotation of first inner circle 4 and first outer lane 6, can realize again that the aligning to output shaft 3, for the biserial aligning roller bearing among the prior art, increased the contact bearing area, bearing capacity is higher, when being applied to large-scale excavator with the gyration speed reducer that installs above-mentioned aligning bearing with center ring 5, can reduce aligning bearing's damage trouble, have long service life's advantage, solved the problem that the bearing damages the trouble easily to appear when being applied to large-scale excavator of gyration speed reducer among the prior art because of bearing's bearing capacity is less causes.
In this embodiment, a connecting flange 15 is provided on the outer side wall of the housing 1, and the housing 1 and the vehicle frame can be connected together by using connecting bolts. When the housing 1 of the swing speed reducer is connected to the vehicle frame, an elastic pad may be provided between the connection flange 15 and the vehicle frame to alleviate vibration shock. A gear 16 is arranged at the second end of the output shaft 3 and is used for meshed transmission with the slewing bearing to realize power transmission.
In some embodiments, the rolling bodies 7 include a plurality of cylindrical rollers, the axis of each cylindrical roller is parallel to the axis of the first inner ring 4, and each cylindrical roller is uniformly distributed along the circumferential direction of the first inner ring 4. Each cylindrical roller is mounted between the first inner ring 4 and the intermediate ring 5 through a cage, and the cylindrical rollers can bear not only radial load but also a certain axial load.
In other embodiments, the rolling bodies 7 comprise a plurality of needles, the axis of each needle being parallel to the axis of the first inner ring 4, and each needle being uniformly distributed along the circumference of the first inner ring 4. The smaller diameter of the needle is beneficial to reducing the size of the self-aligning bearing, and the number of the needle allowed to be arranged between the first inner ring 4 and the middle ring 5 is larger, and the bearing capacity of the self-aligning bearing is improved.
Both self-aligning bearings can be provided as the self-aligning bearing with the intermediate ring 5 in the form of a structure described above; one of the two self-aligning bearings may also be provided as a self-aligning bearing of the above-described design with a center ring 5, and the other as a double-row self-aligning roller bearing.
In the present embodiment, one of the two aligning bearings, which is close to the first end of the output shaft 3, is provided as the aligning bearing having the above-described structural form of the center ring 5, which is referred to as a first aligning bearing 8; one of the two self-aligning bearings, which is remote from the first end of the output shaft 3, is provided as a double row self-aligning roller bearing, referred to as a second self-aligning bearing 9, see fig. 1.
The inside of shell 1 has the cavity, is provided with first spacing step on the inner wall of shell 1, and the one end that first outer lane 6 of first aligning bearing 8 is close to second aligning bearing 9 supports on first spacing step, is provided with spacing retaining ring 10 in the one end that first inner lane 4 of first aligning bearing 8 kept away from second aligning bearing 9. Through the interaction of the first outer ring 6 and the first limiting step and the interaction of the first inner ring 4 and the limiting retainer ring 10, the limiting installation of the first self-aligning bearing 8 can be realized, and the stability of the first self-aligning bearing 8 is ensured.
The second self-aligning bearing 9 comprises a second inner ring, a second outer ring and two rows of spherical rollers, wherein the two rows of spherical rollers are arranged between the second inner ring and the second outer ring through a protection frame.
A second limiting step is arranged on the inner wall of the shell 1, and one end, close to the first aligning bearing 8, of a second outer ring of the second aligning bearing 9 is abutted against the second limiting step. A third limiting step is arranged on the output shaft 3, and the second inner ring is propped against the third limiting step. Through the interaction of the second outer ring and the second limiting step and the interaction of the second inner ring and the third limiting step, the limiting installation of the second self-aligning bearing 9 can be realized, and the stability of the second self-aligning bearing 9 is ensured.
In this embodiment, a vibration damping plate 11 is disposed on a side of the second aligning bearing 9 away from the first aligning bearing 8, and the vibration damping plate 11 is in a ring structure and is sleeved outside the output shaft 3. A fourth limiting step is arranged on the output shaft 3, the inner edge of the vibration reduction plate 11 is embedded between the second inner ring and the fourth limiting step, and the vibration reduction plate 11 can rotate relative to the shell 1 along with the output shaft 3; the outer edge of the damper plate 11 extends to the end face of the housing 1, and can seal the gap between the output shaft 3 and the end of the housing 1.
The vibration damping plate 11 can be a steel plate with a rubber layer coated outside, which is beneficial to shaping and can relieve impact.
The inner cavity of the shell 1 is divided into a first oil cavity 13 and a second oil cavity 14, a framework oil seal 12 is arranged between the shell 1 and the output shaft 3, the framework oil seal 12 separates the first oil cavity 13 from the second oil cavity 14, and two aligning bearings are respectively positioned on two sides of the framework oil seal 12.
A fifth limiting step is arranged on the inner wall of the shell 1, one side, far away from the first aligning bearing 8, of the framework oil seal 12 is propped against the fifth limiting step, and limiting installation of the framework oil seal 12 is achieved through the fifth limiting step.
The first oil chamber 13 is filled with gear oil, and can lubricate each gear in the planetary reduction mechanism 2 and the first aligning bearing 8. The second oil chamber 14 is filled with grease for lubricating the second self-aligning bearing 9.
The specific assembly steps of the rotary speed reducer provided in this embodiment are as follows:
the vibration reduction plate 11 is arranged on the output shaft 3, so that the vibration reduction plate 11 is propped against a fourth limit step of the output shaft 3;
the second aligning bearing 9 is arranged on the output shaft 3, so that a second inner ring of the second aligning bearing 9 is propped against a third limiting step and the vibration reduction plate 11;
the shell 1 is sleeved outside the second aligning bearing 9 and the output shaft 3, so that a second limiting step is propped against a second outer ring of the second aligning bearing 9;
sleeving the framework oil seal 12 on the output shaft 3, and enabling the framework oil seal 12 to prop against a fifth limiting step;
the first aligning bearing 8 is arranged on the output shaft 3, so that the first outer ring 6 of the first aligning bearing 8 is propped against the first limiting step;
the limiting check ring 10 is arranged on the output shaft 3, so that the limiting check ring 10 is propped against the first inner ring 4 of the first aligning bearing 8;
the planetary reduction mechanism 2 is mounted to the output shaft 3 and the housing 1.
In the rotary speed reducer provided by the embodiment, the installation structure of the two aligning bearings is simple, and the rotary speed reducer has the advantage of convenient assembly.
On the other hand, the embodiment of the utility model also provides a working machine, which comprises the rotary speed reducer provided by any embodiment. The rotary speed reducer has the advantages of high bearing capacity, capability of reducing damage faults when being installed on a large excavator and long service life. Therefore, the working machine in the embodiment has the advantages of high bearing capacity, high reliability and low failure rate. The development process of the beneficial effects of the working machine in the embodiment of the present utility model is substantially similar to that of the above-described swing speed reducer, and therefore will not be repeated here.
In the embodiment of the present utility model, the type of the working machine is not limited, and for example, the working machine may be an excavator, a crane, a rotary drilling machine, or the like. In other words, the work machine may use the swing speed reducer according to the embodiment of the present utility model.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. A swing speed reducer, comprising:
a planetary reduction mechanism is arranged in the shell;
the first end of the output shaft extends into the shell and is in transmission connection with the output end of the planetary reduction mechanism, and the second end of the output shaft extends to the outside of the shell;
the bearing assembly comprises two self-aligning bearings, wherein the two self-aligning bearings are arranged between the output shaft and the shell and are distributed along the axis direction of the output shaft at intervals, at least one of the two self-aligning bearings comprises a first inner ring, a middle ring, a first outer ring and rolling bodies, the first inner ring is relatively fixed with the output shaft, the first outer ring is relatively fixed with the shell, the rolling bodies are arranged between the first inner ring and the middle ring, and the middle ring is in spherical fit with the first outer ring.
2. The rotary speed reducer according to claim 1, wherein the rolling bodies include a plurality of cylindrical rollers, an axis of the cylindrical rollers being parallel to an axis of the first inner race, each of the cylindrical rollers being uniformly distributed along a circumferential direction of the first inner race.
3. The rotary speed reducer according to claim 1, wherein the rolling bodies include a plurality of needle rollers, an axis of the needle rollers being parallel to an axis of the first inner race, each of the needle rollers being uniformly distributed along a circumferential direction of the first inner race.
4. The rotary speed reducer of claim 1, wherein one of the two self-aligning bearings, which is adjacent to the first end of the output shaft, is a first self-aligning bearing, and the other is a second self-aligning bearing;
the first self-aligning bearing comprises the middle ring, and the second self-aligning bearing is a double-row self-aligning roller bearing.
5. The rotary speed reducer of claim 4, wherein a first limiting step is arranged on the inner wall of the housing, one end of the first outer ring, which is close to the second aligning bearing, is abutted against the first limiting step, and a limiting retainer ring is arranged at one end of the first inner ring, which is far away from the second aligning bearing.
6. The rotary speed reducer of claim 4, wherein a second limiting step is arranged on the inner wall of the housing, the second aligning bearing comprises a second inner ring, a second outer ring and two rows of spherical rollers, one end of the second outer ring, which is close to the first aligning bearing, abuts against the second limiting step, a third limiting step is arranged on the output shaft, and the second inner ring abuts against the third limiting step.
7. The rotary speed reducer of claim 6, wherein a vibration reduction plate is arranged on one side of the second aligning bearing away from the first aligning bearing, the vibration reduction plate is sleeved on the output shaft, a fourth limiting step is arranged on the output shaft, the inner edge of the vibration reduction plate is embedded between the second inner ring and the fourth limiting step, and the outer edge of the vibration reduction plate extends to the end face of the shell.
8. The rotary speed reducer according to any one of claims 1 to 7, wherein a skeleton oil seal is provided between the housing and the output shaft, the skeleton oil seal dividing an internal cavity of the housing into a first oil chamber and a second oil chamber, and the two aligning bearings are respectively located on both sides of the skeleton oil seal.
9. The swing speed reducer according to claim 1, wherein a connecting flange for connecting with a vehicle frame is provided on an outer side wall of the housing, and a gear for meshing transmission with the slewing bearing is provided at a second end of the output shaft.
10. A work machine comprising the swing speed reducer according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321908790.4U CN220286324U (en) | 2023-07-19 | 2023-07-19 | Rotary speed reducer and working machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321908790.4U CN220286324U (en) | 2023-07-19 | 2023-07-19 | Rotary speed reducer and working machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220286324U true CN220286324U (en) | 2024-01-02 |
Family
ID=89326174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321908790.4U Active CN220286324U (en) | 2023-07-19 | 2023-07-19 | Rotary speed reducer and working machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220286324U (en) |
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2023
- 2023-07-19 CN CN202321908790.4U patent/CN220286324U/en active Active
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