Concentric shaft positive and negative rotation transmission device
By setting the inner and outer shafts concentricly, combined with pulley and bearing design, the problems of large space and noise of traditional concentric shaft forward and reverse transmission devices are solved, and the transmission effect with a smaller space and higher concentric shaft degree is achieved.
Patent Information
- Application Number
- CN202422151866.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-09-03
AI Technical Summary
The traditional concentric shaft forward and reverse transmission device occupies a large space, and the concentric shaft degree is difficult to guarantee, and the noise is high.
The inner shaft and the outer shaft are arranged concentrically, and connected to the transmission belt through the first and second pulleys, the inner shaft and the outer shaft are reversely rotated, and the concentric shaft degree and load bearing are improved in combination with radial and flat bearings.
The equipment takes up space, improves the concentric axis, and is smoother in transmission and less noise.
Smart Images
Figure CN223215704U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of transmission equipment, in particular to a coaxial forward and reverse rotation transmission device. Background Art
[0002] For mechanisms like counter-rotating blowers, two concentric shafts with opposite rotational directions are required to simultaneously drive them. Traditional concentric shaft forward and reverse drive systems typically consist of two independent power transmissions, one at each end of the rotating workpiece, each independently driven. This type of concentric shaft forward and reverse drive system occupies a large amount of axial space, making concentricity difficult to ensure. Utility Model Content
[0003] The purpose of the utility model is to provide a concentric shaft forward and reverse rotation transmission device to solve the problems existing in the prior art, with low noise, reduced occupied space and improved transmission concentricity.
[0004] To achieve the above purpose, the present invention provides the following solutions:
[0005] The utility model provides a concentric shaft forward and reverse transmission device, including an inner shaft, an outer shaft, a first pulley and a second pulley, the inner shaft is sleeved in the outer shaft and is rotatably connected to the outer shaft, the inner shaft and the outer shaft are coaxially arranged, the first pulley is fixedly connected to the inner shaft, the second pulley is fixedly connected to the outer shaft, the first pulley and the second pulley are both used to be connected to a transmission belt, and the transmission belt can drive the inner shaft and the outer shaft to rotate in opposite directions around the axis of the inner shaft through the first pulley and the second pulley respectively.
[0006] Preferably, it further includes a first radial bearing and a first plane bearing, there are at least two first radial bearings, and there is at least one first plane bearing, and each of the first radial bearings and each of the first plane bearings are arranged between the outer side wall of the inner shaft and the inner side wall of the outer shaft.
[0007] Preferably, a first radial bearing is provided at each end of the outer shaft, a first plane bearing is provided at the end of the outer shaft close to the second pulley, and the ends of the outer shaft and the inner shaft away from the second pulley are used to connect with the transmission member.
[0008] Preferably, it further comprises a box body, wherein the box body has a mounting portion, and the box body is sleeved outside the outer shaft and is rotatably connected to the outer shaft.
[0009] Preferably, it also includes a second radial bearing and a second plane bearing, there are at least two second radial bearings, and at least one second plane bearing, and each second radial bearing and each second plane bearing are arranged between the outer side wall of the outer shaft and the inner side wall of the box body.
[0010] Preferably, a second radial bearing is provided at each of the two ends of the box body, and a second plane bearing is provided at one end of the box body close to the second pulley.
[0011] Preferably, both ends of the inner shaft extend out of the outer shaft, and both ends of the outer shaft extend out of the box body. Both ends of the inner shaft and both ends of the outer shaft are provided with shaft extensions.
[0012] Preferably, the first radial bearing and the second radial bearing are both rolling bearings, and the first plane bearing and the second plane bearing are both thrust bearings.
[0013] Preferably, two first end covers are further included, and one first end cover is connected to each end of the outer shaft.
[0014] Preferably, two second end covers are further included, and one second end cover is connected to each end of the box body.
[0015] Compared with the prior art, the utility model has achieved the following technical effects:
[0016] The utility model provides a concentric shaft forward and reverse transmission device, comprising an inner shaft, an outer shaft, a first pulley, and a second pulley. The inner shaft is sleeved within the outer shaft and is rotatably connected to the outer shaft. The inner shaft and the outer shaft are arranged concentrically. The first pulley is fixedly connected to the inner shaft, and the second pulley is fixedly connected to the outer shaft. The first pulley and the second pulley are both used to be connected to a transmission belt. The transmission belt can drive the inner shaft and the outer shaft to rotate in opposite directions around the axis of the inner shaft through the first pulley and the second pulley, respectively. By driving the first pulley and the second pulley to rotate through the belt, the inner shaft and the outer shaft are driven to rotate respectively, and the inner shaft and the outer shaft can achieve concentric bidirectional transmission. The concentric arrangement of the inner shaft and the outer shaft can reduce the occupied space and improve the concentricity of the transmission. At the same time, since the first pulley and the second pulley are used for power transmission, the transmission between the first pulley and the second pulley and the transmission belt is smoother and less noisy. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0018] Figure 1 This is a structural diagram of the concentric shaft forward and reverse rotation transmission device provided by the utility model;
[0019] In the figure: 100, concentric shaft forward and reverse transmission device; 1, inner shaft; 2, outer shaft; 3, first pulley; 4, second pulley; 5, first radial bearing; 6, first plane bearing; 7, housing; 701, mounting portion; 8, second radial bearing; 9, second plane bearing; 10, shaft extension; 11, first end cover; 12, second end cover. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0021] The purpose of the utility model is to provide a concentric shaft forward and reverse rotation transmission device to solve the problems existing in the prior art, with low noise, reduced occupied space and improved transmission concentricity.
[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.
[0023] like Figure 1 As shown, the present invention provides a concentric shaft forward and reverse transmission device 100, comprising an inner shaft 1, an outer shaft 2, a first pulley 3, and a second pulley 4. The inner shaft 1 is sleeved within the outer shaft 2 and rotatably connected thereto. The inner shaft 1 and outer shaft 2 are arranged concentrically. The first pulley 3 is fixedly connected to the inner shaft 1, and the second pulley 4 is fixedly connected to the outer shaft 2. The first pulley 3 and the second pulley 4 are both connected to a transmission belt. The transmission belt, via the first pulley 3 and the second pulley 4, can respectively drive the inner shaft 1 and the outer shaft 2 to rotate in opposite directions about the axis of the inner shaft 1. The belts drive the first pulley 3 and the second pulley 4 to rotate, thereby respectively driving the inner shaft 1 and the outer shaft 2 to rotate, thereby achieving concentric bidirectional transmission between the inner shaft 1 and the outer shaft 2. The concentric arrangement of the inner shaft 1 and the outer shaft 2 can reduce space usage and improve transmission concentricity. Furthermore, because the first pulley 3 and the second pulley 4 are used for power transmission, the transmission between the first pulley 3 and the second pulley 4 and the transmission belt is smoother and quieter.
[0024] This embodiment further includes a first radial bearing 5 and a first planar bearing 6. There are at least two first radial bearings 5 and at least one first planar bearing 6, each of which is disposed between the outer sidewall of the inner shaft 1 and the inner sidewall of the outer shaft 2. The first radial bearings 5 can withstand radial loads from the inner shaft 1 and the outer shaft 2, thereby improving the concentricity of the two shafts. The first planar bearings 6 can withstand axial loads from the inner shaft 1 and the outer shaft 2, thereby improving the load-bearing capacity of the concentric shaft forward and reverse transmission device 100 and extending its service life.
[0025] In this embodiment, a first radial bearing 5 is provided at each end of the outer shaft 2. A first planar bearing 6 is provided at the end of the outer shaft 2 proximate to the second pulley 4. The ends of the outer shaft 2 and the inner shaft 1 distal to the second pulley 4 are used to connect to the transmission member. Because the load-bearing capacity of the end distal to the transmission member is greater than that of the end proximate to the transmission member, positioning the first planar bearing 6 at the end distal to the cyclone device's transmission member further increases the load-bearing capacity of the concentric shaft forward and reverse transmission device 100.
[0026] This embodiment further includes a box body 7 having a mounting portion 701. The box body 7 is sleeved outside the outer shaft 2 and rotatably connected to the outer shaft 2. The mounting portion 701 is used to achieve fixed installation with external components, and the mounting portion 701 is preferably a flange.
[0027] This embodiment further includes a second radial bearing 8 and a second planar bearing 9. There are at least two second radial bearings 8 and at least one second planar bearing 9, each of which is disposed between the outer sidewall of the outer shaft 2 and the inner sidewall of the housing 7. The second radial bearings 8 are capable of bearing radial loads from the housing 7 and the outer shaft 2, thereby improving the concentricity of the housing 7 and the outer shaft 2 and ensuring installation accuracy. The second planar bearings 9 are capable of bearing axial loads from the housing 7 and the outer shaft 2, thereby improving the load-bearing capacity of the concentric shaft forward and reverse transmission device 100 and extending its service life.
[0028] In this embodiment, a second radial bearing 8 is provided at each end of the housing 7, and a second planar bearing 9 is provided at the end of the housing 7 closest to the second pulley 4. Because the load-bearing capacity at the end farther from the transmission member is greater than that at the end closer to the transmission member, positioning the second planar bearing 9 at the end farther from the transmission member of the cyclone device further increases the load-bearing capacity of the concentric shaft forward and reverse transmission device 100.
[0029] In this embodiment, both ends of the inner shaft 1 extend outside the outer shaft 2, and both ends of the outer shaft 2 extend outside the housing 7. Both ends of the inner shaft 1 and the outer shaft 2 are provided with shaft extensions 10. The ends of the inner shaft 1 are respectively connected to the first pulley 3 and the member to be transmitted, while the ends of the outer shaft 2 are respectively connected to the second pulley 4 and the member to be transmitted.
[0030] As a preferred embodiment, the first radial bearing 5 and the second radial bearing 8 are rolling bearings, the first plane bearing 6 and the second plane bearing 9 are thrust bearings, and more preferably, the first plane bearing 6 and the second plane bearing 9 are one-way thrust bearings.
[0031] In this embodiment, two first end covers 11 are further included, and one first end cover 11 is connected to each end of the outer shaft 2. The first end cover 11 can protect the first radial bearing 5 and the first plane bearing 6.
[0032] In this embodiment, two second end covers 12 are further included, and one second end cover 12 is connected to each end of the box body 7. The second end cover 12 can protect the second radial bearing 8 and the second plane bearing 9.
[0033] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.
Claims
1. A concentric shaft forward and reverse transmission device, characterized in that: The invention comprises an inner shaft, an outer shaft, a first pulley and a second pulley, wherein the inner shaft is sleeved in the outer shaft and is rotatably connected to the outer shaft, the inner shaft and the outer shaft are coaxially arranged, the first pulley is fixedly connected to the inner shaft, the second pulley is fixedly connected to the outer shaft, the first pulley and the second pulley are both used to be connected to a transmission belt, and the transmission belt can drive the inner shaft and the outer shaft to rotate in opposite directions around the axis of the inner shaft through the first pulley and the second pulley respectively; It also includes a first radial bearing and a first plane bearing, there are at least two first radial bearings and at least one first plane bearing, each of the first radial bearings and each of the first plane bearings are arranged between the outer side wall of the inner shaft and the inner side wall of the outer shaft.
2. The concentric shaft forward and reverse transmission device according to claim 1, characterized in that: The two ends of the outer shaft are respectively provided with a first radial bearing, the end of the outer shaft close to the second pulley is provided with a first plane bearing, and the ends of the outer shaft and the inner shaft away from the second pulley are used to connect with the transmission member.
3. The concentric shaft forward and reverse transmission device according to claim 1 or 2, characterized in that: It also includes a box body, which has a mounting portion. The box body is sleeved outside the outer shaft and is rotatably connected to the outer shaft.
4. The concentric shaft forward and reverse transmission device according to claim 3, characterized in that: It also includes a second radial bearing and a second plane bearing, there are at least two second radial bearings and at least one second plane bearing, and each of the second radial bearings and each of the second plane bearings are arranged between the outer side wall of the outer shaft and the inner side wall of the box body.
5. The concentric shaft forward and reverse transmission device according to claim 4, characterized in that: A second radial bearing is respectively provided at both ends of the box body, and a second plane bearing is provided at one end of the box body close to the second pulley.
6. The concentric shaft forward and reverse transmission device according to claim 3, characterized in that: Both ends of the inner shaft extend out of the outer shaft, and both ends of the outer shaft extend out of the box body. Both ends of the inner shaft and the outer shaft are provided with shaft extensions.
7. The concentric shaft forward and reverse transmission device according to claim 4, characterized in that: The first radial bearing and the second radial bearing are both rolling bearings, and the first plane bearing and the second plane bearing are both thrust bearings.
8. The concentric shaft forward and reverse transmission device according to any one of claims 1-2, characterized in that: It also includes two first end covers, and each end of the outer shaft is connected to a first end cover.
9. The concentric shaft forward and reverse transmission device according to claim 3, characterized in that: It also includes two second end covers, and one second end cover is connected to each end of the box body.