CN112283257A - Parallel eccentric coupling and electric wheel - Google Patents
Parallel eccentric coupling and electric wheel Download PDFInfo
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- CN112283257A CN112283257A CN202011321693.6A CN202011321693A CN112283257A CN 112283257 A CN112283257 A CN 112283257A CN 202011321693 A CN202011321693 A CN 202011321693A CN 112283257 A CN112283257 A CN 112283257A
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- input
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- connecting rod
- disc
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/02—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions
- F16D3/04—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted to allow radial displacement, e.g. Oldham couplings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention relates to a parallel eccentric coupling, which comprises an input part, an output part and a parallel connecting rod mechanism. The input portion is capable of being in driving connection with a power source. The output part can be in transmission connection with the driven part. The parallel connecting rod mechanism comprises an input parallel connecting rod assembly and an output parallel connecting rod assembly, a near end connecting rod in the input parallel connecting rod assembly rotates synchronously with the input part, a far end connecting rod in the output parallel connecting rod assembly rotates synchronously with the output part, and a far end connecting rod in the input parallel connecting rod assembly is fixedly connected with a near end connecting rod in the output parallel connecting rod assembly. The invention also relates to an electric wheel comprising the parallel eccentric coupling. The parallel connecting rod mechanism in the parallel eccentric coupling has the advantages of stable and compact structure, only needs a motion space which is approximately in a round cake shape in the transmission process, can effectively reduce the axial size of the parallel eccentric coupling, and is suitable for being installed in an electric wheel.
Description
Technical Field
The invention relates to the technical field of power transmission, in particular to a parallel eccentric coupling and an electric wheel.
Background
The coupling is a mechanical part which connects two shafts or a connecting shaft and a rotating part, ensures that the two shafts or the connecting shaft and the rotating part rotate together in the process of transmitting motion and power and is not separated under normal conditions. Taking two-shaft transmission as an example, in the transmission process of two shafts, the input shaft and the output shaft are radially positioned through bearings and the like, so that the axial directions of the input part and the output part are aligned, and stable transmission of the coupler is facilitated. However, in some special cases, such as in electric wheels, radial mutual movement between the motor and the rim occurs during bumpy road conditions; further, the coupling is required to be capable of transmitting torque at a constant speed, and the input portion and the output portion in the coupling are required to have relative displacement in the radial direction. Conventional eccentric couplings generally have a large axial dimension and a small radial dimension. However, in some scenarios where the axial dimension is constrained, for example, in an electric wheel driven by a motor, the arrangement needs to directly place the motor in the wheel, and an eccentric coupling needs to be added between the motor output shaft and the wheel hub, so that the motor can jump up and down relative to the wheel while transmitting torque.
Disclosure of Invention
Accordingly, it is necessary to provide a parallel eccentric coupling with a smaller axial dimension and a corresponding electric wheel, in order to solve the problem that the conventional eccentric coupling has a large dimension and cannot be applied to an electric wheel.
A parallel eccentric coupling, comprising:
the input part can be in transmission connection with a power source;
the output part can be in transmission connection with the driven part;
the parallel connecting rod mechanism comprises an input parallel connecting rod assembly and an output parallel connecting rod assembly, a near end connecting rod in the input parallel connecting rod assembly and the input part rotate synchronously, a far end connecting rod in the output parallel connecting rod assembly and the output part rotate synchronously, and a far end connecting rod in the input parallel connecting rod assembly and a near end connecting rod in the output parallel connecting rod assembly are fixedly connected.
In one embodiment, the links in the input parallel link assembly and the links in the output parallel link assembly are arranged in parallel.
In one embodiment, the parallel linkage comprises an intermediate lever, two input levers and two output levers; the near ends of the two input rods are respectively hinged with the input part, the near ends of the two output rods are respectively hinged with the far ends of the two input rods, and the far ends of the two output rods are respectively hinged with the output part; the output rods extend out of the holding ends from the far ends of the output rods to the direction far away from the near ends, and the two ends of the middle rod are respectively hinged with the holding ends of the two output rods; the input portion is connected with two input rods to form a near-end connecting rod of the input parallel connecting rod assembly, a connecting line of the far ends of the input rods forms a far-end connecting rod of the input parallel connecting rod assembly, the far-end connecting rod of the input parallel connecting rod assembly is overlapped with the near-end connecting rod of the output parallel connecting rod assembly, and the output portion is connected with two output rods to form a far-end connecting rod of the output parallel connecting rod assembly.
In one embodiment, the parallel linkage comprises an intermediate lever, two input levers and two output levers; the near ends of the two input rods are respectively hinged with the input part, the near ends of the two output rods are respectively hinged with the far ends of the two input rods, and the far ends of the two output rods are respectively hinged with the output part; two ends of the middle rod are respectively hinged with the far ends of the two input rods; the input portion is connected with two input rods, the input portion is formed by a near-end connecting rod of the input parallel connecting rod assembly, the intermediate rod is formed by a far-end connecting rod of the input parallel connecting rod assembly, the far-end connecting rod of the input parallel connecting rod assembly is overlapped with the near-end connecting rod of the output parallel connecting rod assembly, and the output portion is connected with two output rods, the output portion is formed by a far-end connecting rod of the output parallel connecting rod assembly.
In one embodiment, the parallel eccentric coupling comprises two sets of the parallel link mechanisms, and corresponding links of the two sets of the parallel link mechanisms are arranged in parallel.
In one embodiment, the two sets of parallel link mechanisms are arranged in a central symmetry manner by taking the rotating shaft of the input part as a center.
In one embodiment, the input portion comprises an input disc, a central portion of the input disc is in transmission connection with a power source, a partial edge of the input disc is fixedly connected with the proximal link in the input parallel link assembly, or a partial edge of the input disc forms the proximal link in the input parallel link assembly; the output part comprises an output disc, the output disc can be in transmission connection with a driven piece, part of the end face of the output disc is fixedly connected with a far-end connecting rod in the output parallel connecting rod assembly, or part of the end face of the output disc forms a far-end connecting rod in the output parallel connecting rod assembly.
In one embodiment, an output groove is formed in one side face of the output disc, the input disc and the parallel link mechanism are at least partially accommodated in the output groove, and the input disc and the parallel link mechanism are arranged in a staggered stacking mode along the axial direction of the parallel eccentric coupling.
In one embodiment, the inner edge of the output groove is provided with two bosses which respectively protrude towards the direction of the axis, and the two bosses are arranged in a central symmetry manner by taking the rotating shaft of the output disc as the center; the two bosses are respectively connected with the two groups of output parallel connecting rod assemblies to form a far-end connecting rod corresponding to the output parallel connecting rod assemblies.
In one embodiment, the input disc is in a quadrilateral shape, two adjacent corners of the input disc are used as the proximal links in one set of the input parallel link assemblies, and the other two adjacent corners of the input disc are used as the proximal links in the other set of the input parallel link assemblies.
In one embodiment, the input disc is disposed on one side of the output disc; the input part also comprises an input shaft, the input shaft is arranged on one side of the input disc far away from the output disc, the input shaft is arranged on the rotating shaft center of the input disc, and the input shaft can be fixedly connected with a power source; the edge of the output disc can be fixedly connected with the driven piece.
An electric wheel comprising a wheel and the parallel eccentric coupling of any of the above embodiments, wherein the output of the parallel eccentric coupling is in driving connection with the wheel.
In one embodiment, the electric wheel further comprises an electric motor, and an output shaft of the electric motor is in transmission connection with the input part in the parallel eccentric coupling.
The parallel eccentric shaft coupling and the corresponding electric wheel drive the input part to move through the parallel connecting rod mechanism. The input parallel connecting rod assembly and the output parallel connecting rod assembly cooperate to allow the eccentric distance in the linear direction (such as the vertical direction in a use state) to be generated between the input part and the output part, the eccentric distance between the input part and the output part is adjustable within a certain range, and meanwhile, the parallel connecting rod mechanism can also ensure that the input part can transmit torque to the output part at the same speed at any eccentric position, so that the stability of a transmission process is ensured. The parallel connecting rod mechanism in the parallel eccentric coupling has the advantages of stable and compact structure and small eccentric dynamic load, only needs a motion space which is approximately in a round cake shape in the transmission process, can effectively reduce the axial size of the parallel eccentric coupling, and is suitable for being installed in an electric wheel.
Drawings
Fig. 1 is a schematic perspective view of a parallel eccentric coupling according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a parallel eccentric coupling in a centered state according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a parallel eccentric coupling according to an embodiment of the present invention in an eccentric state.
Wherein: 100. a parallel eccentric coupling; 110. an input section; 111. an input disc; 112. an input shaft; 120. an output section; 121. an output groove; 122. a boss; 130. a parallel linkage mechanism; 131. inputting a parallel connecting rod assembly; 132. an output parallel link assembly; 133. an intermediate lever; 134. an input lever; 135. and an output rod.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
As shown in fig. 1-3, one embodiment of the present invention provides a parallel eccentric coupling 100 for transmitting motion and torque between a power source and a driven member. Specifically, the parallel eccentric coupling 100 includes an input portion 110, an output portion 120, and a parallel linkage 130. The input 110 can be drivingly connected to the power source. The output 120 can be in driving connection with a driven member. The parallel link mechanism 130 includes an input parallel link assembly 131 and an output parallel link assembly 132, a proximal link in the input parallel link assembly 131 rotates in synchronization with the input portion 110, a distal link in the output parallel link assembly 132 rotates in synchronization with the output portion 120, and the distal link in the input parallel link assembly 131 and the proximal link in the output parallel link assembly 132 are fixedly connected. It should be noted that the proximal end and the distal end in this embodiment are not simply concepts of physical directions, but rather concepts of transmission directions of motion and torque transmitted from the input end to the output end, that is, along the transmission path of motion and torque, the proximal end is relatively closer to the input portion 110, and the distal end is relatively closer to the output portion 120; when the transmission of motion and torque disappears, there is no so-called proximal concept or distal concept.
In the parallel eccentric coupling 100, the input portion 110 drives the output portion 120 to move through the parallel link mechanism 130. The input parallel link assembly 131 and the output parallel link assembly 132 cooperate to allow an eccentricity in a linear direction (for example, a vertical direction in a use state) between the input portion 110 and the output portion 120 to be generated, the eccentricity between the input portion 110 and the output portion 120 is adjustable within a certain range, and the parallel link mechanism 130 can ensure that the input portion 110 can transmit torque to the output portion 120 at a constant speed at any eccentric position, so that the stability of a transmission process is ensured. The parallel link mechanism 130 in the parallel eccentric coupling 100 has the advantages of stable and compact structure, only needs a motion space in a substantially round cake shape in the transmission process, can effectively reduce the axial size of the parallel eccentric coupling 100, and is suitable for being installed in an electric wheel.
The parallel link mechanism 130 is one of the key structures in the parallel eccentric coupling 100, and two links in the input parallel link assembly 131 can be kept in parallel and the same motion state at the moment during the motion, and two links in the output parallel link assembly 132 can also be kept in parallel and the same motion state at the moment during the motion. Optionally, the distal end link of the input parallel link assembly 131 and the proximal end link of the output parallel link assembly 132 are parallel or arranged at a set angle, which can meet the transmission requirement of the parallel eccentric coupling 100. As shown in fig. 1-3, the following embodiments are described using only the example of the distal link in the input parallel linkage assembly 131 being parallel to the proximal link in the output parallel linkage assembly 132. Further, due to the variety of the link mechanism variations, it is possible that one of the links in the parallel link mechanism 130 does not have a rod-like structure, but it should be understood that the link in the present invention may have an actual rod-like structure or may have another structure functioning as a link. The following two parallel link mechanisms 130 with the same principle but slightly different specific configurations are exemplified, and those skilled in the art can derive other parallel link mechanisms 130 according to the present invention by reasonable modification based on the principle.
In an achievable manner, the parallel link mechanism 130 includes an intermediate lever 133, two input levers 134, and two output levers 135. The proximal ends of the two input rods 134 are respectively hinged with the input part 110, the proximal ends of the two output rods 135 are respectively hinged with the distal ends of the two input rods 134, and the distal ends of the two output rods 135 are respectively hinged with the output part 120. Both ends of the intermediate lever 133 are hinged to distal ends of the two input levers 134, respectively. The portion of the input portion 110 connecting the two input rods 134 forms a proximal link of the input parallel linkage assembly 131, the intermediate rod 133 forms a distal link of the input parallel linkage assembly 131, the distal link of the input parallel linkage assembly 131 coincides with the proximal link of the output parallel linkage assembly 132, and the portion of the output portion 120 connecting the two output rods 135 forms a distal link of the output parallel linkage assembly 132. The parallel link mechanism 130 in this embodiment has the advantages of simple and stable structure.
1-3, the parallel linkage 130 includes an intermediate lever 133, two input levers 134, and two output levers 135. The proximal ends of the two input rods 134 are respectively hinged with the input part 110, the proximal ends of the two output rods 135 are respectively hinged with the distal ends of the two input rods 134, and the distal ends of the two output rods 135 are respectively hinged with the output part 120. The output rods 135 extend from the distal ends thereof to holding ends in the direction away from the proximal ends, and the two ends of the intermediate rod 133 are respectively hinged to the holding ends of the two output rods 135. The portion of the input portion 110 connecting the two input rods 134 forms a proximal link of the input parallel link assembly 131, the line connecting the distal ends of the input rods 134 forms a distal link of the input parallel link assembly 131, the distal link of the input parallel link assembly 131 coincides with the proximal link of the output parallel link assembly 132, and the portion of the output portion 120 connecting the two output rods 135 forms a distal link of the output parallel link assembly 132. The provision of the intermediate lever 133 at the opposite-extending end of the output lever 135 not only ensures the basic functions of the input parallel link assembly 131 and the output parallel link assembly 132, but also enables the intermediate lever 133 (the distal end link of the input parallel link assembly 131 or the proximal end link of the output parallel link assembly 132) to be distanced from the input portion 110, effectively avoiding interference between the intermediate lever 133 and the input portion 110, and also enables inertial force balance to be performed, thereby reducing or eliminating dynamic pressure acting on the output portion 120.
In the above embodiment, the parallel eccentric coupling 100 allows the input portion 110 to move relative to the output portion 120 in the direction of the perpendicular bisector of the proximal and distal links. When the parallel eccentric coupling 100 is applied to an electric wheel, the proximal link and the distal link may be arranged in the horizontal direction in the use state, so as to allow the input portion 110 to be vertically eccentric with respect to the output portion 120, thereby ensuring that the vehicle can still realize stable transmission of motion and torque when jolting up and down.
Optionally, in each of the above embodiments, the parallel eccentric coupling 100 includes one or two sets of parallel link mechanisms 130, which can meet the requirements of motion and power transmission. As one way of achieving this, as shown in fig. 1-3, the parallel eccentric coupling 100 includes two sets of parallel linkage mechanisms 130, and corresponding links of the two sets of parallel linkage mechanisms 130 are arranged in parallel, i.e., corresponding proximal links and distal links of the two sets of parallel linkage mechanisms 130 are respectively parallel. The use of two sets of parallel linkage 130 can result in a slight reduction in the strength of the parallel links compared to the use of only one set of parallel linkage 130, thereby allowing the use of links of smaller diameter. Meanwhile, two sets of parallel link mechanisms 130 can form a plurality of power and torque transmission positions between the input part 110 and the output part 120, and the transmission stability of the parallel eccentric coupling 100 is effectively enhanced. Further, the two sets of parallel link mechanisms 130 are arranged in a central symmetry manner with the rotating shaft of the input part 110 as the center, so that only interaction torque exists between the input part 110 and the output part 120, and the transmission stability of the parallel eccentric coupling 100 is further enhanced.
The input part 110 and the output part 120 are respectively connected with a power source and a driven part in a transmission manner, and the above embodiment is not limited to a specific structural form thereof as long as the function of transmitting motion and torque can be realized. Alternatively, the input portion 110 and the output portion 120 may be shaft-like parts, disc-like parts, or circular ring-like parts. As shown in fig. 1 to 3, the input portion 110 includes an input disc 111, a central portion of the input disc 111 can be drivingly connected to the power source, a portion of an edge of the input disc 111 is fixedly connected to the proximal link in the input parallel link assembly 131, or a portion of an edge of the input disc 111 forms the proximal link in the input parallel link assembly 131. The output portion 120 includes an output disc that is drivingly connectable to the driven member, a portion of an end surface of the output disc being fixedly connected to the distal link in the output parallel link assembly 132, or a portion of an end surface of the output disc forming the distal link in the output parallel link assembly 132. The input part 110 and the output part 120 in the form of disks have the characteristics of large radial dimension and small axial dimension, and can further reduce the axial dimension of the parallel eccentric coupling 100, thereby providing more installation space for other structures in the electric wheel.
Further, as shown in fig. 1 to 3, the input disc 111 is disposed on one side in the axial direction of the output disc. The input portion 110 further includes an input shaft 112, the input shaft 112 is disposed on a side of the input disc 111 away from the output disc, the input shaft 112 is disposed on a rotation axis of the input disc 111, and the input shaft 112 can be fixedly connected to a power source (e.g., a rotor of a motor or an output shaft of a motor). The rim of the output disc can be fixedly connected to a driven member, such as a spokeless rim. The input shaft 112 is arranged to facilitate synchronous rotation of the input disc 111 and the power source, the edge of the output disc is fixedly connected with the driven element, the driven element can be driven at a position far away from the axis, and rapid driving of the driven element is achieved. In other embodiments, the input disc 111 may be directly connected to the power source through screws or keys, and an output shaft may be disposed on a side of the output disc away from the input disc 111, and further connected to the axle center of the wheel.
In an embodiment of the present invention, as shown in fig. 1 to 3, an output groove 121 is formed on one side surface of the output disc, the input disc 111 and the parallel link mechanism 130 are at least partially accommodated in the output groove 121, and the input disc 111 and the parallel link mechanism 130 are arranged in a staggered and stacked manner along the axial direction of the parallel eccentric coupling 100, so that the axial dimension of the parallel eccentric coupling 100 can be significantly reduced. Or a through hole can be directly formed in the end face of the output disc, so that the overall mass and the axial size of the parallel eccentric coupling 100 are further reduced, and the structure is simple and compact. Alternatively, in the above embodiment, the distal end of the output rod 135 is hinged to the end surface of the output tray, or the distal end of the output rod 135 is hinged to the bottom surface of the output groove 121 on the output tray. As another way of realizing this, the inner edge of the output groove 121 has two bosses 122, the two bosses 122 protrude toward the axial center direction, and the two bosses 122 are arranged in a central symmetry with the rotation axis of the output disc as the center. The two bosses 122 are connected to the two sets of output parallel link assemblies 132, respectively, to form distal links in the corresponding output parallel link assemblies 132. The two bosses 122 also facilitate the parallel link assembly not to extend beyond the outer edge of the output disc during movement.
In one embodiment of the present invention, as shown in fig. 1-3, the input disc 111 is quadrilateral, with two adjacent corners of the input disc 111 being proximal links in one set of input parallel linkage assemblies 131, and two other adjacent corners of the input disc 111 being proximal links in another set of input parallel linkage assemblies 131. The quadrangular input disc 111 not only further reduces the overall mass of the parallel eccentric coupling 100, but also the space between two corners on the input disc 111 effectively avoids the parallel linkage assembly. In other embodiments of the present invention, the input disc 111 is in the shape of a pie, and the proximal links between the input parallel link assemblies 131 are fixed to the edge of the input disc 111; or the edge of the input disc 111 is hinged to the proximal ends of the two input rods 134, and the edge of the input disc 111 serves as a proximal link in the input parallel linkage assembly 131. In the above embodiments, the hinge connection of the rod members may be implemented by pins, etc., and as a practical implementation, the hinge parts in the parallel link mechanism 130 are implemented by pins, which is not only simple in structure but also easy to replace. And the edge of the output disc may also be connected to the spotless rim by pins.
An embodiment of the present invention further provides an electric wheel, which includes a wheel and the parallel eccentric coupling 100 of any one of the above embodiments, wherein the output part 120 of the parallel eccentric coupling 100 is in transmission connection with the wheel, for example, the outer edge of the output disc is fixedly connected with a rim through a plurality of screws. Further, the electric wheel further includes a motor, and an output shaft of the motor is in transmission connection with the input portion 110 of the parallel eccentric coupling 100.
In the electric wheel, the input part 110 drives the output part 120 to move through the parallel link mechanism 130. The input parallel link assembly 131 and the output parallel link assembly 132 cooperate to allow an eccentricity in a linear direction (for example, a vertical direction in a use state) between the input portion 110 and the output portion 120 to be generated, the eccentricity between the input portion 110 and the output portion 120 is adjustable within a certain range, and the parallel link mechanism 130 can ensure that the input portion 110 can transmit torque to the output portion 120 at a constant speed at any eccentric position, so that the stability of a transmission process is ensured. The parallel link mechanism 130 in the parallel eccentric coupling 100 has the advantages of stable and compact structure, only needs a motion space in a substantially round cake shape in the transmission process, can effectively reduce the axial size of the parallel eccentric coupling 100, and is suitable for being installed in an electric wheel.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A parallel eccentric coupling, characterized in that it comprises:
the input part can be in transmission connection with a power source;
the output part can be in transmission connection with the driven part;
the parallel connecting rod mechanism comprises an input parallel connecting rod assembly and an output parallel connecting rod assembly, a near end connecting rod in the input parallel connecting rod assembly and the input part rotate synchronously, a far end connecting rod in the output parallel connecting rod assembly and the output part rotate synchronously, and a far end connecting rod in the input parallel connecting rod assembly and a near end connecting rod in the output parallel connecting rod assembly are fixedly connected.
2. The parallel eccentric coupling of claim 1, wherein the links in the input parallel linkage assembly and the links in the output parallel linkage assembly are arranged in parallel.
3. The parallel eccentric coupling of claim 2, wherein the parallel linkage mechanism comprises an intermediate rod, two input rods, and two output rods; the near ends of the two input rods are respectively hinged with the input part, the near ends of the two output rods are respectively hinged with the far ends of the two input rods, and the far ends of the two output rods are respectively hinged with the output part; the output rods extend out of the holding ends from the far ends of the output rods to the direction far away from the near ends, and the two ends of the middle rod are respectively hinged with the holding ends of the two output rods; the input portion is connected with two input rods to form a near-end connecting rod of the input parallel connecting rod assembly, a connecting line of the far ends of the input rods forms a far-end connecting rod of the input parallel connecting rod assembly, the far-end connecting rod of the input parallel connecting rod assembly is overlapped with the near-end connecting rod of the output parallel connecting rod assembly, and the output portion is connected with two output rods to form a far-end connecting rod of the output parallel connecting rod assembly.
4. The parallel eccentric coupling of claim 2, wherein the parallel linkage mechanism comprises an intermediate rod, two input rods, and two output rods; the near ends of the two input rods are respectively hinged with the input part, the near ends of the two output rods are respectively hinged with the far ends of the two input rods, and the far ends of the two output rods are respectively hinged with the output part; two ends of the middle rod are respectively hinged with the far ends of the two input rods; the input portion is connected with two input rods, the input portion is formed by a near-end connecting rod of the input parallel connecting rod assembly, the intermediate rod is formed by a far-end connecting rod of the input parallel connecting rod assembly, the far-end connecting rod of the input parallel connecting rod assembly is overlapped with the near-end connecting rod of the output parallel connecting rod assembly, and the output portion is connected with two output rods, the output portion is formed by a far-end connecting rod of the output parallel connecting rod assembly.
5. The parallel eccentric coupling according to any one of claims 1 to 4, characterized in that the parallel eccentric coupling comprises two sets of the parallel link mechanisms, corresponding links of the two sets of the parallel link mechanisms are arranged in parallel, and the two sets of the parallel link mechanisms are arranged in central symmetry centering on a rotation axis of the input part.
6. The parallel eccentric coupling of claim 5, wherein the input portion comprises an input disc, a central portion of the input disc being drivingly connectable to a power source, a portion of an edge of the input disc being fixedly connected to a proximal link in the input parallel linkage assembly, or a portion of an edge of the input disc forming a proximal link in the input parallel linkage assembly; the output part comprises an output disc, the output disc can be in transmission connection with a driven piece, part of the end face of the output disc is fixedly connected with a far-end connecting rod in the output parallel connecting rod assembly, or part of the end face of the output disc forms a far-end connecting rod in the output parallel connecting rod assembly.
7. The parallel eccentric coupling according to claim 6, wherein an output groove is formed in one side surface of the output disc, the input disc and the parallel linkage mechanism are at least partially accommodated in the output groove, and the input disc and the parallel linkage mechanism are arranged in a staggered and stacked manner along the axial direction of the parallel eccentric coupling.
8. The parallel eccentric coupling according to claim 7, wherein the inner edge of said output groove has two bosses protruding toward the axial center, said two bosses being arranged in a central symmetry about the rotation axis of said output disc; the two bosses are respectively connected with the two groups of output parallel connecting rod assemblies to form a far-end connecting rod corresponding to the output parallel connecting rod assemblies.
9. The parallel eccentric coupling of claim 6, wherein the input disc is quadrilateral, two adjacent corners on the input disc being proximal links in one set of the input parallel linkage assemblies, and two other adjacent corners on the input disc being proximal links in another set of the input parallel linkage assemblies; the input disc is arranged on one side of the output disc; the input part also comprises an input shaft, the input shaft is arranged on one side of the input disc far away from the output disc, the input shaft is arranged on the rotating shaft center of the input disc, and the input shaft can be fixedly connected with a power source; the edge of the output disc can be fixedly connected with the driven piece.
10. An electric wheel comprising a wheel and a parallel eccentric coupling according to any of claims 1 to 9, wherein the output of the parallel eccentric coupling is in driving connection with the wheel; the electric wheel further comprises a motor, and an output shaft of the motor is in transmission connection with the input part in the parallel eccentric coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011321693.6A CN112283257A (en) | 2020-11-23 | 2020-11-23 | Parallel eccentric coupling and electric wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011321693.6A CN112283257A (en) | 2020-11-23 | 2020-11-23 | Parallel eccentric coupling and electric wheel |
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| Publication Number | Publication Date |
|---|---|
| CN112283257A true CN112283257A (en) | 2021-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011321693.6A Pending CN112283257A (en) | 2020-11-23 | 2020-11-23 | Parallel eccentric coupling and electric wheel |
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| Country | Link |
|---|---|
| CN (1) | CN112283257A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115076245A (en) * | 2022-07-19 | 2022-09-20 | 清华大学 | Flexible eccentric coupling, electric wheel and electric automobile |
-
2020
- 2020-11-23 CN CN202011321693.6A patent/CN112283257A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115076245A (en) * | 2022-07-19 | 2022-09-20 | 清华大学 | Flexible eccentric coupling, electric wheel and electric automobile |
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