CN218236056U - Positioning assembly and slewing mechanism - Google Patents
Positioning assembly and slewing mechanism Download PDFInfo
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- CN218236056U CN218236056U CN202221155610.5U CN202221155610U CN218236056U CN 218236056 U CN218236056 U CN 218236056U CN 202221155610 U CN202221155610 U CN 202221155610U CN 218236056 U CN218236056 U CN 218236056U
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- main shaft
- positioning assembly
- slewing bearing
- brake
- output gear
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Abstract
The application discloses locating component includes: an outer housing; the main shaft is rotatably arranged on the outer shell; the output gear is connected to the output end of the main shaft; the brake is arranged in the outer shell and used for limiting the rotation of the main shaft; and the rotary encoder is connected to the input end of the main shaft and used for monitoring the rotary speed of the main shaft, and when the speed of the main shaft reaches a preset value, the brake brakes the main shaft so as to limit the rotation of the main shaft and the output gear. By adopting the method and the device, the positioning precision of the slewing mechanism is improved, the shaking amount caused in the braking process is reduced, and the safety and the stability of the equipment are enhanced.
Description
Technical Field
The application relates to the technical field of engineering machinery, in particular to a positioning assembly and a rotating mechanism.
Background
The slewing mechanism is a mechanism for driving mechanical equipment to perform slewing motion in the field of engineering machinery. The slewing mechanism generally comprises a motor, a speed reducer and a slewing bearing, wherein the motor drives the speed reducer to rotate, so that a gear at the output end of the speed reducer drives the slewing bearing to rotate, and the slewing action of equipment is realized.
According to the requirements of the rotation speed and the rotation resistance moment of equipment, the speed reducer generally adopts multi-stage speed reduction, certain gaps exist among gears at all stages of the speed reducer, lateral gaps exist between the gear at the output end of the speed reducer and a rotary support, the accumulation of the sizes of the gaps causes the positioning precision of the rotation mechanism during rotation positioning to be greatly reduced, and meanwhile, the rotation mechanism is limited by the sizes of the gears, and the influence of the rigidity problem of the gears in the braking process can also cause larger shaking amount.
SUMMERY OF THE UTILITY MODEL
In order to enhance the positioning accuracy of the slewing mechanism and reduce the shaking amount in the braking process, the application provides a positioning assembly and the slewing mechanism, and the following technical scheme is adopted:
in a first aspect, the present application provides a positioning assembly comprising:
an outer housing;
the main shaft is rotatably arranged on the outer shell;
the output gear is connected to the output end of the main shaft;
the brake is arranged in the outer shell and used for limiting the rotation of the main shaft; and
and the rotary encoder is connected to the input end of the main shaft and is used for monitoring the rotary speed of the main shaft, and when the speed of the main shaft reaches a preset value, the brake brakes the main shaft so as to limit the rotation of the main shaft and the output gear.
Optionally, a positioning hole is formed in the outer shell, an axis of the positioning hole is parallel to an axis of the spindle, and a first connecting piece penetrates through the positioning hole.
Optionally, the first connecting piece is a first bolt.
Optionally, the brake is connected to an input end of the spindle.
Optionally, a second connecting piece is arranged on the rotary encoder, and the rotary encoder is connected with the outer shell through the second connecting piece.
Optionally, the second connector is a second bolt.
In a second aspect, the present application provides a swing mechanism, comprising:
a slewing bearing;
the output end of the speed reducer is meshed with the slewing bearing;
the driver is connected with the input end of the speed reducer and used for driving the slewing bearing to act; and
in the positioning assembly of any of the first aspect, the output gear is engaged with the slewing bearing, and the slewing bearing rotates to drive the output gear to rotate.
Optionally, the number of the positioning components is one or more.
As described above, when the turning mechanism starts to operate, the brake receives a signal from the control system, the brake is opened, and the turning mechanism starts to operate. When the driving motor and the speed reducer stop working, the slewing bearing slowly decelerates, so that the speed of the main shaft is gradually reduced, when the slewing encoder monitors that the slewing speed of the main shaft is reduced to a preset value, a speed signal is converted into an electric signal and fed back to the control system, the control system outputs a braking signal to the brake, and the brake acts to limit the rotation of the main shaft and further limit the rotation of the slewing bearing.
Adopt the bookAccording to the technical scheme, as the multi-stage gear does not exist between the output gear of the positioning assembly and the brake, the slewing bearing is braked through the brake, and only the lateral clearance y between the output gear and the slewing bearing 2 The positioning precision can be influenced, and compared with the traditional mode, the positioning precision of the slewing mechanism is greatly improved.
In addition, the output gear of the positioning assembly is connected with the brake through the main shaft, compared with various gears of the speed reducer, the rigidity of the main shaft is high, and the size of the main shaft can be properly increased according to load requirements in actual operation.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for a person skilled in the art to obtain other drawings based on these drawings without exceeding the protection scope of the present application.
FIG. 1 is a schematic view of a positioning assembly according to an embodiment of the present application;
FIG. 2 is a perspective view of FIG. 1;
FIG. 3 is a schematic view showing the internal structure of the positioning assembly;
fig. 4 is a schematic diagram of a swing mechanism and a mounting position of the swing mechanism on a device according to an embodiment of the present application.
In the drawings, reference numerals refer to the following:
1. a positioning assembly; 11. an outer housing; 111. a first connecting member; 12. a main shaft; 13. an output gear; 14. a brake; 15. a rotary encoder; 151. a second connecting member;
2. a slewing bearing;
3. a speed reducer;
4. a driver;
100. a fixed portion;
200. a rotating part.
Detailed Description
The technical solutions of the present application are described below clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, not all, of the embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In order to facilitate understanding of the technical solution of the present application, first, a brief description is made of the problems of the conventional swing mechanism. The operation of a slewing bearing in the existing slewing mechanism is generally realized by a driving motor and a speed reducer, however, because a plurality of stages of transmission gears exist in the speed reducer, gaps exist among all stages of transmission gears, and a lateral gap also exists between a gear at the output end of the speed reducer and the slewing bearing, so that after the driving motor stops working, the input end of the speed reducer is braked, and the slewing bearing cannot stop rotating immediately under the influence of the gaps among the plurality of stages of gears and the gaps between the output end of the speed reducer and the slewing bearing, thereby greatly reducing the positioning accuracy of the slewing mechanism.
On the other hand, in order to control the overall size of the swing mechanism and to consider the problems of the reduction ratio, etc., the size of the gear must be within a certain range, and during the braking process of the swing mechanism, the gear is affected by the clearance, so that a large amount of sloshing exists in the whole swing mechanism due to the problem of the transmission rigidity of the gear, and the stability and the safety of the equipment are affected.
Referring to fig. 1, 2 and 3, a positioning assembly disclosed for an embodiment of the present application includes an outer housing 11, a main shaft 12, an output gear 13, a brake 14 and a rotary encoder 15.
The outer housing 11 is a mounting carrier for other components and protects the internal components.
The main shaft 12 is rotatably connected to the outer shell 11, the axis of the main shaft 12 coincides with the axis of the outer shell 11, and the output end of the main shaft 12 penetrates through the outer shell 11.
The output gear 13 can be connected to the output end of the main shaft 12 by a key connection or the like, but in practical applications, the output gear 13 can also be integrally formed with the main shaft 12, and the output gear 13 is used for meshing with a slewing bearing of a slewing mechanism.
The stopper 14 is located in the outer housing 11, and is fixedly mounted on the inner wall of the outer housing 11, and the rotation of the main shaft 12 is limited by the stopper 14.
The rotary encoder 15 is connected to the input end of the main shaft 12, and the rotary encoder 15 is electrically connected to the brake 14, and is used for monitoring the rotary speed of the main shaft 12 in real time, that is, converting an angular speed signal of the main shaft 12 into an electric signal and feeding the electric signal back to the control system.
It should be understood that, when the slewing mechanism only relies on the speed reducer for braking, the clearance between the gears of each stage is marked as x according to different stages of the speed reducer 1 、x 2 \8230, the lateral gap between the output end of the speed reducer and the rotary support is marked as y1, and the gap between the speed reducer and the rotary support = x 1 +x 2 +……y 1 。
In the embodiment of the application, when the rotating mechanism performs the rotating motion, the positioning assembly is arranged on the equipment, so that the output gear 13 of the positioning assembly is meshed with the rotating support. For convenience, the lateral clearance between the output gear 13 and the slewing bearing is denoted as y in the embodiment of the present application 2 。
When the swing mechanism starts to operate, the brake 14 receives a signal from the control system, the brake 14 is opened, and the swing mechanism starts to operate. When the driving motor and the speed reducer stop working, the slewing bearing slowly decelerates, so the speed of the main shaft 12 also gradually decreases, when the slewing encoder 15 monitors that the slewing speed of the main shaft 12 decreases to a preset value, a speed signal is converted into an electric signal and fed back to the control system, the control system outputs a braking signal to the brake 14, and the brake 14 acts to limit the rotation of the main shaft 12 and further limit the rotation of the slewing bearing.
By adopting the technical scheme of the application, because no multi-stage gear exists between the output gear 13 of the positioning assembly and the brake 14, the brake 14 brakes the slewing bearing, only the lateral clearance y2 between the output gear 13 and the slewing bearing influences the positioning precision, and compared with the traditional mode, the positioning precision of the slewing mechanism is greatly improved.
In addition, the output gear 13 of the positioning assembly is connected with the brake 14 through the main shaft 12, compared with various gears of the speed reducer, the rigidity of the main shaft 12 is higher, and the size of the main shaft 12 can be properly increased according to load requirements in actual operation, so that the transmission rigidity in the rotation process is enhanced, the shaking amount brought in the braking process is reduced, and the safety and the stability of the equipment are enhanced.
As an alternative solution to the embodiment of the present application, the brake 14 is connected to the input end of the main shaft 12.
Referring to fig. 1 and fig. 2, as an optional technical solution of this application embodiment, the outer wall of the outer shell 11 is fixedly provided with a convex edge along a circumferential direction, the convex edge is circumferentially and uniformly provided with positioning holes, specifically, the axes of the positioning holes are parallel to the axis of the main shaft 12, the first connecting member 111 is penetrated in the positioning holes, the outer shell 11 can be detachably connected to the equipment main body through the first connecting member 111, and the positioning assembly is conveniently replaced.
Optionally, the first connecting member 111 employs a first bolt. Connect through first bolt, it is more convenient to install and dismantle.
Referring to fig. 1 and fig. 2, as an optional technical solution of the embodiment of the present application, a second connecting member 151 is disposed on the rotary encoder 15, an installation form of the second connecting member 151 is similar to an installation form of the first connecting member 111 on the outer housing 11, and the rotary encoder 15 can be detachably connected to the outer housing 11 through the second connecting member 151, so that the rotary encoder 15 is conveniently replaced.
Optionally, the second connecting member 151 employs a second bolt. Connect through the second bolt, it is more convenient to install and dismantle.
Referring to fig. 4, the present embodiment further discloses a slewing mechanism, which includes a slewing bearing 2, a speed reducer 3, a driver 4, and the positioning assembly 1 in any of the above embodiments. The swing mechanism is installed between the fixed portion 100 and the rotating portion 200, the fixed portion 100 corresponds to an apparatus body for carrying the swing mechanism and the rotating portion 200, and the rotating portion 200 is installed on the swing mechanism, which drives the rotating portion 200 to swing.
The slewing bearing 2 is an existing mechanical component, which generally includes an inner ring, an outer ring and rolling bodies arranged between the inner ring and the outer ring, of course, depending on actual working conditions, the inner ring can be fixed with the fixed part 100 to play a supporting role, the outer ring rotates, and the rotating part 200 is fixed with the outer ring; alternatively, the outer ring may be fixed to the fixed portion 100, the inner ring may rotate, and the rotating portion 200 may be fixed to the inner ring.
The speed reducer 3 can select two-stage transmission or even multi-stage transmission according to requirements. The output end of the speed reducer 3 is meshed with the inner ring or the outer ring of the slewing bearing 2.
In one implementation form of the present application, the outer ring portion of the slewing bearing 2 is fixed, the rotating portion 200 is installed on the inner ring portion of the slewing bearing 2, the driver 4 is connected with the input end of the speed reducer 3, the speed reducer 3 is installed on the rotating portion 200, the output end of the speed reducer 3 is meshed with the outer ring of the slewing bearing 2, when the driver 4 is started, the speed reducer 3 is driven to rotate, and the speed reducer 3 drives the rotating portion 200 to perform slewing motion.
The outer shell 11 of the positioning assembly 1 can be mounted on the rotating part 200, the output gear 13 is meshed with the outer ring of the slewing bearing 2, and when the slewing bearing 2 performs slewing motion, the output gear 13 and the main shaft 12 are driven to perform follow-up slewing motion. After the driver 4 stops working, the slewing bearing 2 gradually decelerates, when the slewing encoder 15 monitors that the slewing speeds of the main shaft 12 and the output gear 13 are reduced to the preset values, the brake 14 acts to limit the rotation of the main shaft 12 and the output gear 13, and further limit the rotation of the slewing bearing 2.
As a technical solution of the slewing mechanism provided in the embodiment of the present application, one or more positioning assemblies 1 may be disposed along the circumferential direction of the slewing bearing 2, so as to further improve the positioning accuracy.
The embodiments of the present application are described in detail above. The principle and the implementation of the present application are explained herein by applying specific examples, and the above description of the embodiments is only used to help understand the technical solutions and the core ideas of the present application. Therefore, the person skilled in the art should, according to the idea of the present application, change or modify the embodiments and applications of the present application based on the scope of protection of the present application. In view of the above, the description should not be taken as limiting the application.
Claims (8)
1. A positioning assembly, comprising:
an outer housing;
the main shaft is rotatably arranged on the outer shell;
the output gear is connected to the output end of the main shaft;
the brake is arranged in the outer shell and used for limiting the rotation of the main shaft; and
and the rotary encoder is connected to the input end of the main shaft and used for monitoring the rotary speed of the main shaft, and when the speed of the main shaft reaches a preset value, the brake brakes the main shaft so as to limit the rotation of the main shaft and the output gear.
2. The positioning assembly according to claim 1, wherein the outer housing is provided with a positioning hole, an axis of the positioning hole is parallel to an axis of the main shaft, and a first connecting piece is arranged in the positioning hole in a penetrating manner.
3. The positioning assembly of claim 2, wherein the first connector is a first bolt.
4. The positioning assembly of claim 1, wherein the brake is coupled to an input end of the spindle.
5. The positioning assembly of claim 1, wherein the rotary encoder has a second connector disposed thereon, the rotary encoder being connected to the outer housing by the second connector.
6. The positioning assembly of claim 5, wherein the second connector is a second bolt.
7. A swing mechanism, comprising:
a slewing bearing;
the output end of the speed reducer is meshed with the slewing bearing;
the driver is connected with the input end of the speed reducer and used for driving the slewing bearing to act; and
the positioning assembly of any of claims 1-6, said output gear being in meshing engagement with said slewing bearing, said slewing bearing rotating to rotate said output gear.
8. The swing mechanism as claimed in claim 7, wherein the number of the positioning assemblies is one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221155610.5U CN218236056U (en) | 2022-05-13 | 2022-05-13 | Positioning assembly and slewing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221155610.5U CN218236056U (en) | 2022-05-13 | 2022-05-13 | Positioning assembly and slewing mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218236056U true CN218236056U (en) | 2023-01-06 |
Family
ID=84671635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221155610.5U Active CN218236056U (en) | 2022-05-13 | 2022-05-13 | Positioning assembly and slewing mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218236056U (en) |
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2022
- 2022-05-13 CN CN202221155610.5U patent/CN218236056U/en active Active
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