Speed reducer
By using friction drive bearings instead of planetary gear meshing in the reducer, the problem of high noise in planetary reducers was solved, achieving both noise reduction and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-28
- Publication Date
- 2026-03-20
AI Technical Summary
Planetary reducers generate significant noise due to the meshing of planetary gears during transmission, resulting in loud vibrations.
Multiple friction drive bearings are installed in the first reducer module of the reducer. The input shaft is connected to the friction drive bearings for power output through friction transmission, thus avoiding the use of planetary gear meshing.
The noise of the reducer was reduced, the structure was simplified, and the cost was lowered.
Smart Images
Figure CN224017638U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of mechanical structures, in particular to a speed reducer. BACKGROUND
[0002] At present, the planetary reducer usually adopts a planetary gear reduction mechanism as a planetary rolling body, and the planetary gear reduction mechanism simultaneously transmits power through gear meshing with the inner and outer rings of the planetary reducer. During the transmission process of the planetary reducer by using the planetary gear meshing, the vibration sound is large when the gears in the planetary reducer mesh due to the excessively fast speed input by the driving part, resulting in a large noise of the planetary reducer during the transmission process. CONTENT OF THE UTILITY MODEL
[0003] To solve the above problems, the purpose of the embodiments of the present application is to provide a speed reducer.
[0004] In a first aspect, the embodiments of the present application provide a speed reducer, comprising: an input shaft, a first speed reducer module and a second speed reducer module;
[0005] One end of the input shaft is located inside the first speed reducer module, and the other end extends to the outside of the first speed reducer module. The first speed reducer module is detachably connected with the second speed reducer module. The output end of the first speed reducer module is in transmission connection with the input end of the second speed reducer module.
[0006] The first speed reducer module is provided with a plurality of friction transmission bearings. The one end of the input shaft located inside the first speed reducer module is in transmission connection with the friction transmission bearings.
[0007] In the scheme provided by the above first aspect of the embodiments of the present application, a plurality of friction transmission bearings are arranged in the first speed reducer module of the speed reducer. The one end of the input shaft located inside the first speed reducer module is in transmission connection with the friction transmission bearings. Compared with the way that the planetary reducer produces a large noise due to the large vibration sound when the planetary reducer transmits power by using the planetary gear meshing in the related art, the power output of the speed reducer is realized by the friction transmission between the input shaft and the friction transmission bearings in the first speed reducer module. Therefore, the planetary gear is not needed in the first speed reducer module of the speed reducer, so that the situation that the planetary reducer produces a large noise due to the large vibration sound when the planetary reducer transmits power by using the planetary gear meshing is avoided. Moreover, the structure of the speed reducer is simplified, and the cost of the speed reducer is reduced.
[0008] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS
[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the accompanying drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.
[0010] Figure 1 A structural schematic diagram of a reducer provided by an embodiment of the present application is shown, which has a first reducer module;
[0011] Figure 2 A left view of the reducer provided by an embodiment of the present application is shown, which has a first reducer module;
[0012] Figure 3 An internal structural schematic diagram of the first reducer module provided by an embodiment of the present application is shown;
[0013] Figure 4 A three-dimensional structural schematic diagram of a second output planet carrier provided by an embodiment of the present application is shown;
[0014] Figure 5 A structural schematic diagram of a reducer provided by an embodiment of the present application is shown, which has a third reducer module;
[0015] Figure 6 A three-dimensional structural schematic diagram of a third output planet carrier provided by an embodiment of the present application is shown;
[0016] Figure 7 A structural schematic diagram of a reducer provided by an embodiment of the present application is shown, which is formed by connecting a third reducer module, a first reducer module and a second reducer module. DETAILED DESCRIPTION
[0017] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0018] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and do not connote or imply any relative importance or any priority. Thus, a feature described as "first" or "second" can implicitly or explicitly include one or more of the features.
[0019] In the present application, unless specifically and particularly defined otherwise, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, they can be fixedly connected, or detachably connected, or integrally connected; they can be mechanically connected, or electrically connected; they can be directly connected, or indirectly connected through an intermediate medium, or the communication between the two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0020] At present, the planetary reducer usually adopts a planetary gear reduction mechanism as a planetary rolling body, and the planetary gear reduction mechanism simultaneously transmits power through gear meshing with the inner and outer rings of the planetary reducer. In the process of transmission by planetary gear meshing, the vibration sound of the planetary reducer is large when the gears mesh inside the planetary reducer due to the too fast speed of the driving part input, which causes the planetary reducer to produce a large noise during transmission.
[0021] Based on this, the embodiment provides a reducer, a plurality of friction transmission bearings are arranged in the first reducer module of the reducer, one end of the input shaft located in the first reducer module is in transmission connection with the friction transmission bearings, and the power output of the reducer is realized by the friction transmission between the input shaft and the friction transmission bearings in the first reducer module. The planetary gear is not used in the first reducer module of the reducer, so that the condition that the planetary reducer produces a large noise due to the large vibration sound when the planetary reducer transmits power by planetary gear meshing is avoided.
[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and embodiments.
[0023] Embodiment
[0024] Referring to Figure 1 The embodiment provides a reducer, which has a first reducer module and a second reducer module. The reducer comprises an input shaft 100, a first reducer module 200 and a second reducer module 300.
[0025] One end of the input shaft 100 is located inside the first reducer module 200, and the other end extends outside the first reducer module 200, and the first reducer module 200 is detachably connected with the second reducer module 300, and the output end of the first reducer module 200 is in driving connection with the input end of the second reducer module 300.
[0026] The first reducer module 200 is provided with a plurality of friction transmission bearings 240, and the one end of the input shaft 100 located inside the first reducer module 200 is in driving connection with the friction transmission bearings 240.
[0027] Specifically, referring to Figure 2 the left view of the reducer with the first reducer module shown, the first reducer module 200 comprises a first output planet carrier 210, a first bearing 220 and a first reducer module outer ring 230.
[0028] The first reducer module outer ring 230 is sleeved on the first output planet carrier 210.
[0029] The first bearing 220 is fixedly connected with the first output planet carrier 210; and the first output planet carrier 210 is in rotary connection with the first reducer module outer ring 230 through the first bearing 220.
[0030] The first reducer module outer ring 230 is also in driving connection with the friction transmission bearings 240.
[0031] The friction transmission bearings 240 are arranged in an interference fit manner between the input shaft 100 and the first reducer module outer ring 230.
[0032] The first reducer module outer ring 230 is detachably connected with the second reducer module 300.
[0033] Optionally, the first reducer module outer ring 230 is detachably connected with the second reducer module 300 through bolts.
[0034] Referring to Figure 3 the internal structure diagram of the first reducer module shown, specifically, the first output planet carrier 210 comprises a first output planet carrier body 212, a first output planet carrier output shaft 213 and a plurality of friction transmission bearing fixing rods 211.
[0035] The first bearing 220 is fixedly connected with the circumference of the first output planet carrier body 212.
[0036] A plurality of friction transmission bearing fixing rods 211 are fixed on the end face of the first output planet carrier body 212 facing the input shaft 100, and a friction transmission bearing 240 is fixedly connected to each of the plurality of friction transmission bearing fixing rods 211; so that the friction transmission bearing 240 is in transmission connection with the input shaft 100 and the first reducer module outer ring 230.
[0037] A first output planet carrier output shaft 213 is fixedly arranged on the end face of the first output planet carrier body 212 away from the input shaft 100; and the first output planet carrier output shaft 213 is in transmission connection with the input end of the second reducer module 300.
[0038] Optionally, the first reducer module 200 further comprises a first locking ring 250.
[0039] The first locking ring 250 is fixedly sleeved on the first output planet carrier output shaft 213 to limit the first bearing 220.
[0040] As shown in Figure 3 The friction transmission bearing 240 comprises a first inner bearing seat ring 241, first balls 242, and a first outer bearing seat ring 243, the first outer bearing seat ring 243 is sleeved on the first inner bearing seat ring 241, and a gap exists between the first inner bearing seat ring 241 and the first outer bearing seat ring 243.
[0041] The first balls 242 are evenly arranged in the gap between the first inner bearing seat ring 241 and the first outer bearing seat ring 243 and can roll between the first inner bearing seat ring 241 and the first outer bearing seat ring 243.
[0042] The inner circumferential surface of the first inner bearing seat ring 241 is fixedly connected with the friction transmission bearing fixing rod 211.
[0043] Optionally, the outer surface of the first outer bearing seat ring 243 is sleeved with a rubber ring.
[0044] Optionally, the first outer bearing seat ring 243 is made of an elastic material.
[0045] The friction transmission bearing 240 has a certain clearance, so that the deformation of the first inner bearing seat ring 241 and the first outer bearing seat ring 243 of the friction transmission bearing 240 has a certain space during operation, reducing the extrusion on the first balls 242 and prolonging the service life of the friction transmission bearing 240.
[0046] In this way, during the operation of the reducer with the first reducer module 200, the input shaft 100 rotates to drive the rotation of each friction transmission bearing 240, and each friction transmission bearing 240 rotates to drive the rotation of the 210.
[0047] When the input shaft 100 rotates, the first outer bearing race 243 rotates around the input shaft 100 under the action of friction due to the interference fit between the first outer bearing race 243 and the first reducer module outer ring 230, that is, the friction transmission bearing 240 rotates around the input shaft 100, but the rotation of the friction transmission bearing 240 is slower than the rotation of the input shaft 100, achieving the purpose of speed reduction, and reducing the noise generated by the reducer at the same time.
[0048] In the reducer proposed in the embodiment, as shown in Figure 1 The second reducer module 300 includes a sun gear 310, an inner ring gear 330, a second output planet carrier 340, a second reducer module outer ring 350, and a second bearing 360.
[0049] The sun gear 310 is coaxial with and drivingly connected to the first output planet carrier output shaft 213.
[0050] The circumferential surface of the inner ring gear 330 is fixedly connected to the inner circumferential surface of the second reducer module outer ring 350.
[0051] The planet gears 320 are connected to the second output planet carrier 340, and after being connected to the second output planet carrier 340, the planet gears 320 are arranged between the sun gear 310 and the inner ring gear 330, and the planet gears 320 are respectively meshed with the sun gear 310 and the inner ring gear 330.
[0052] The second reducer module outer ring 350 is sleeved on the second output planet carrier 340, and the second output planet carrier 340 is rotatably connected to the second reducer module outer ring 350 through the second bearing 360.
[0053] The second reducer module outer ring 350 is also detachably connected to the first reducer module outer ring 230.
[0054] Referring to the perspective structural schematic view of the second output planet carrier shown in Figure 4 The second output planet carrier 340 includes a second output planet carrier body 342, a second output planet carrier output shaft 343, and a plurality of planet gear fixing rods 341.
[0055] The second bearing 360 is fixedly connected to the circumferential surface of the second output planet carrier body 342.
[0056] Each of the plurality of planet gear fixing rods 341 is arranged on the end surface of the second output planet carrier body 342 facing the input shaft 100.
[0057] Each of the plurality of planet gear fixing rods 341 is arranged on the end surface of the second output planet carrier body 342 facing the input shaft 100.
[0058] The output shaft 343 of the second output planetary carrier is fixedly installed at the other end of the second output planetary carrier body 342 away from the input shaft 100.
[0059] The end of the output shaft 343 of the second output planetary carrier, that is, the end away from the input shaft 100, extends to the outside of the outer ring 350 of the second reducer module. Furthermore, the second reducer module 300 also includes a second locking ring 370.
[0060] The second locking ring 370 is fitted onto the output shaft 343 of the second output planetary carrier to limit and fix the second bearing 360.
[0061] Furthermore, the first bearing 220 and the second bearing 360 can be, but are not limited to, four-point contact ball bearings, deep groove ball bearings, and angular contact bearings, so that the first bearing 220 and the second bearing 360 can withstand axial and radial forces.
[0062] The outer rings of the first bearing 220 and the second bearing 360 can be integrated with the outer rings of the first reducer module 230 and the second reducer module 350, respectively. The inner rings of the first bearing 220 and the second bearing 360 can be integrated with the first output planetary carrier 210 and the second output planetary carrier 340, respectively.
[0063] Furthermore, the sun gear 310 can be integrated with the first output planetary carrier 210.
[0064] Furthermore, the cross-sections of the friction drive bearing fixing rod 211 and the planetary gear fixing rod 341 are elliptical, which facilitates the interference fit connection between the friction drive bearing fixing rod 211 and the friction drive bearing 240, and the planetary gear fixing rod 341 and the bearings on it.
[0065] Furthermore, the internal gear ring 330 can be integrated with the outer ring 350 of the second reducer module.
[0066] The reducer proposed in this embodiment also includes a third reducer module 400, which can replace the first reducer module 200 described above.
[0067] See Figure 5 The schematic diagram of the reducer with a third reducer module shown is shown in the figure, and see also... Figure 6 The schematic diagram of the three-dimensional structure of the third output planetary carrier shown shows the third reducer module 400, which includes: a second inner bearing housing 410, a second outer bearing housing 420, a third output planetary carrier 430, a third output planetary carrier output shaft 432, a second ball bearing 440, and an outer ring 450 of the third reducer module.
[0068] The third reducer module outer ring 450 is sleeved on the second outer bearing seat ring 420, the second outer bearing seat ring 420 is sleeved on the outside of the second inner bearing seat ring 410, and a gap is formed between the second outer bearing seat ring 420 and the second inner bearing seat ring 410.
[0069] One end of the third output planet carrier 430 is a circular ring structure, the circular ring structure end of the third output planet carrier 430 is arranged in the gap between the second inner bearing seat ring 410 and the second outer bearing seat ring 420, and the other end of the third output planet carrier 430 is fixedly connected with the third output planet carrier output shaft 432.
[0070] The circular ring structure end of the third output planet carrier 430 is provided with a ball accommodating groove 431; the ball accommodating groove 431 is provided with a second ball 440; and the second ball 440 can roll in the ball accommodating groove 431.
[0071] One end of the input shaft 100 extends into the second inner bearing seat ring 410 and is fixedly connected with the second inner bearing seat ring 410, and the other end of the input shaft 100 extends to the outside of the third reducer module 400.
[0072] The third output planet carrier output shaft 432 is coaxially arranged with the sun gear 310 and is in transmission connection with the sun gear 310.
[0073] The third reducer module outer ring 450 is detachably connected with the second reducer module outer ring 350.
[0074] Optionally, the third reducer module outer ring 450 is detachably connected with the second reducer module outer ring 350 through bolts.
[0075] In this way, during the operation of the reducer with the third reducer module 400, the input shaft 100 rotates to drive the second inner bearing seat ring 410 to rotate.
[0076] When the second inner bearing seat ring 410 rotates, the second ball 440 in the second inner bearing seat ring 410 rotates around the second inner bearing seat ring 410, and the third output planet carrier 430 also rotates under the action of the revolution of the second ball 440, but the third output planet carrier 430 rotates slower than the second inner bearing seat ring 410, so that the purpose of speed reduction is achieved, and the noise generated by the reducer is reduced at the same time.
[0077] Optionally, the third reducer module 400 further comprises a third locking ring 460.
[0078] The third locking ring 460 is fixed on the third reducer module outer ring 450 away from the second reducer module outer ring 350 by bolts, so as to limit and fix the bearing formed by the second inner bearing seat ring 410, the second outer bearing seat ring 420, the third output planet carrier 430 and the second ball 440.
[0079] Referring to Figure 7 The third reducer module, the first reducer module and the second reducer module are connected to form a reducer, and each of the third reducer module, the first reducer module and the second reducer module is an independent reducer individual, which can be combined according to requirements, such as Figure 7 The input shaft 100 is in transmission connection with the input end of the third reducer module 400, the output end of the third reducer module 400 is in transmission connection with the input end of the first reducer module 200, and the output end of the first reducer module 200 is in transmission connection with the input end of the second reducer module 300.
[0080] Further, as shown in the reducer, Figure 7 The second reducer module 300 is not combined as the first-stage reducer, so that the noise of the reducer is reduced, and the reducer can output good torque and power.
[0081] The reducer has the following characteristics:
[0082] 1. The design of the first bearing and the second bearing in the reducer can prevent the first output planet carrier and the second output planet carrier from swinging during rotation, and limit the radial and axial positions of the first output planet carrier and the second output planet carrier.
[0083] 2. The friction transmission bearing in the reducer has a certain clearance, so that the first inner bearing seat ring and the first outer bearing seat ring of the friction transmission bearing have a certain deformation space during operation. During deformation, the certain clearance can reduce the extrusion on the first ball, thereby prolonging the service life of the friction transmission bearing.
[0084] In summary, the embodiment provides a kind of reducer, by being provided with multiple friction transmission bearings in the first reducer module of reducer, one end of input shaft in the first reducer module is connected with friction transmission bearing, compared with the way that the vibration sound of planetary gear engagement transmission in related art planetary reducer is large, the power output of reducer is carried out by the friction transmission of input shaft and the friction transmission bearing in the first reducer module, without using planetary gear in the first reducer module of reducer, to avoid the case that the vibration sound of planetary gear engagement transmission in planetary reducer is large, the noise of planetary reducer is large, and the structure of reducer is simplified, the cost of reducer is reduced.
[0085] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A speed reducer, characterized in that, include: Input shaft, first reducer module and second reducer module; One end of the input shaft is located inside the first reducer module, and the other end extends to the outside of the first reducer module. The first reducer module and the second reducer module are detachably connected, and the output end of the first reducer module is connected to the input end of the second reducer module. The first reducer module is equipped with multiple friction drive bearings, and the input shaft is connected to the friction drive bearings at one end within the first reducer module.
2. The reducer according to claim 1, characterized in that, The first reducer module includes: a first output planetary carrier, a first bearing, and an outer ring of the first reducer module; The outer ring of the first reducer module is fitted onto the first output planetary carrier; The first bearing is fixedly connected to the first output planetary carrier; the first output planetary carrier is rotatably connected to the outer ring of the first reducer module through the first bearing. The outer ring of the first reducer module is also connected to the friction drive bearing. The friction drive bearing is installed between the input shaft and the outer ring of the first reducer module with an interference fit. The outer ring of the first reducer module is detachably connected to the second reducer module.
3. The reducer according to claim 2, characterized in that, The first output planetary carrier includes: the first output planetary carrier body, the first output planetary carrier output shaft, and multiple friction drive bearing fixing rods; The first bearing is circumferentially fixedly connected to the body of the first output planetary carrier; Multiple friction drive bearing fixing rods are fixed to the end face of the first output planetary carrier body facing the input shaft, and friction drive bearings are fixedly connected to them respectively; the friction drive bearings are respectively connected to the input shaft and the outer ring of the first reducer module. The first output planetary carrier output shaft is fixedly installed on the end face of the first output planetary carrier body away from the input shaft; The output shaft of the first output planetary carrier is connected to the input end of the second reducer module.
4. The reducer according to claim 3, characterized in that, The first reducer module also includes: a first locking ring; The first locking ring is fixedly fitted on the output shaft of the first output planetary carrier to limit the position of the first bearing.
5. The reducer according to claim 3, characterized in that, The friction drive bearing includes: a first inner bearing race, a first ball, and a first outer bearing race; The first outer bearing housing ring is fitted onto the first inner bearing housing ring, with a gap between them; The first ball bearing is evenly distributed within the gap and can roll; The inner circumferential surface of the first inner bearing seat ring is fixedly connected to the friction drive bearing fixing rod.
6. The reducer according to claim 3, characterized in that, The second reducer module includes: a sun gear, an internal gear ring, a second output planetary carrier, an outer ring of the second reducer module, and a second bearing; The sun gear is coaxial with and connected to the output shaft of the first output planetary carrier; The circumferential surface of the internal gear ring is fixedly connected to the inner circumferential surface of the outer ring of the second reducer module; The planetary gears are connected to the second output planetary carrier and mesh with the sun gear and the internal gear ring, respectively. The outer ring of the second reducer module is fitted onto the second output planetary carrier, and the second output planetary carrier is rotatably connected to the outer ring of the second reducer module through the second bearing; The outer ring of the second reducer module is detachably connected to the outer ring of the first reducer module.
7. The reducer according to claim 6, characterized in that, The second output planetary carrier includes: the second output planetary carrier body, the second output planetary carrier output shaft, and multiple planetary gear fixing rods; The second bearing is circumferentially fixedly connected to the body of the second output planetary carrier; Each planetary gear fixing rod is fixed at intervals on the end face of the second output planetary carrier body and is connected to the planetary gear respectively; The other end of the second output planetary carrier body is fixedly provided with a second output planetary carrier output shaft, and the end of the second output planetary carrier output shaft extends to the outer side of the outer ring of the second reducer module.
8. The reducer according to claim 7, characterized in that, The second reducer module also includes: a second locking ring; The second locking ring is sleeved on the output shaft of the second output planetary carrier and is used to limit and fix the second bearing.
9. The reducer according to claim 7, characterized in that, Also includes: Third reducer module; The third reducer module includes: a second inner bearing race, a second outer bearing race, a third output planetary carrier, a second ball bearing, and an outer ring of the third reducer module; The outer ring of the third reducer module is fitted onto the second outer bearing housing, which is fitted onto the second inner bearing housing, with a gap between them. One end of the third output planetary carrier is configured as an annular structure to accommodate the rolling balls within the gap, and the other end is fixedly connected to the output shaft of the third output planetary carrier. One end of the input shaft is fixed to the second inner bearing race, and the other end extends out of the third reducer module; The output shaft of the third output planetary carrier is coaxial with the sun gear and is connected for transmission. The outer ring of the third reducer module is detachably connected to the outer ring of the second reducer module.
10. The reducer according to claim 9, characterized in that, The third reducer module also includes: a third locking ring; The third locking ring is fixed to the end of the outer ring of the third reducer that is away from the outer ring of the second reducer module by bolts.