Universal drive

Abstract

The present invention relates to a universal driving device, which includes: a sun gear, which is rotatably arranged; a ring gear, which is arranged on a rotation plane parallel to the rotation plane of the sun gear, and the rotation axis of the ring gear can move relative to the rotation axis of the sun gear; and a gear train, which allows relative movement between the rotation axis of the sun gear and the rotation axis of the ring gear, and forms a continuous power transmission state between the sun gear and the ring gear.

Description

Technical Field

[0001] The present invention relates to a technology related to a driving device that receives power from a rotational power source such as a motor to output a converted rotational force. Background Art

[0002] The driving device of the vehicle drives the vehicle by transmitting power from a rotational power source such as an engine or a motor to wheels.

[0003] Recently, a drive device in the form of an in-wheel motor in which a motor is directly installed in a driving wheel has been proposed. However, the in-wheel motor drive device has problems such as durability of the motor and ride quality problems caused by increased unsprung mass, and therefore has not been widely used.

[0004] The contents described in this background technology section are only used to enhance the understanding of the background of the invention and cannot be regarded as an admission that the contents form the prior art already known to a person skilled in the art.

[0005] Prior art literature

[0006] (Patent Document 1) KR 1020140062538A Summary of the invention

[0007] 1. Technical issues to be resolved

[0008] The present invention aims to provide a universal drive device, which receives power from a rotating power source such as a motor to output a converted rotating force. When the universal drive device is applied to a vehicle, good climbing and acceleration performance can be ensured by appropriately decelerating the input power, and the power source such as a motor can be set separately from the wheels that receive severe impact and vibration, thereby improving the durability of the power source and ensuring a good ride feel by reducing the unsprung mass of the vehicle. Power can be continuously transmitted from the power source in correspondence with the vertical movement of the wheel without using a constant velocity joint, etc., thereby reducing the space between the power source and the wheel, ultimately ensuring good space utilization between the left wheel and the right wheel.

[0009] (II) Technical solution

[0010] The present invention for achieving the above-mentioned purpose provides a universal drive device, characterized in that it includes: a sun gear, which is rotatably arranged; a ring gear, which is arranged on a rotation plane parallel to the rotation plane of the sun gear, and the rotation axis of the ring gear can move relative to the rotation axis of the sun gear; and a gear train, which allows relative movement between the rotation axis of the sun gear and the rotation axis of the ring gear, and forms a continuous power transmission state between the sun gear and the ring gear.

[0011] The gear train may include a plurality of connecting rods, and an angle formed between the plurality of connecting rods connected to each other varies according to a relative movement between a rotation axis of the sun gear and a rotation axis of the ring gear.

[0012] The plurality of connecting rods may include a first connecting rod connected to a rotating shaft of the sun gear and a second connecting rod connected to the first connecting rod, and a joint pinion having the same number of teeth as the sun gear may be provided on a connecting portion of the first connecting rod and the second connecting rod.

[0013] A final pinion gear meshing with the ring gear may be provided on the second connecting rod, and the final pinion gear may have the same number of teeth as the sun gear.

[0014] The final stage pinion may transfer power from the sun gear to the ring gear through a series of gears from the sun gear to the joint pinion and from the joint pinion to the final stage pinion.

[0015] The gear train may be provided in plural numbers.

[0016] The rotation shafts of the plurality of final-stage pinion gears of the gear train may be supported by a planet carrier.

[0017] The plurality of connecting rods may include a first connecting rod connected to a rotating shaft of the sun gear and a second connecting rod connected to the first connecting rod, and the rotating shafts of a series of gears that transmit power from the sun gear to the ring gear may be provided on the first connecting rod and the second connecting rod.

[0018] Gears disposed at even-numbered positions from the sun gear among a series of gears constituting the gear train may have the same number of teeth as the sun gear.

[0019] The gear set at the second position from the sun gear can be a joint pinion set as a coaxial axis with the rotation axis of the first connecting rod and the rotation axis of the second connecting rod, and the gear set at the fourth position from the sun gear can be a final pinion meshing with the ring gear.

[0020] A first intermediate pinion having a rotation shaft provided on the first connecting rod may be meshed with the sun gear and the joint pinion respectively, and a second intermediate pinion having a rotation shaft provided on the second connecting rod may be meshed with the joint pinion and the final pinion respectively.

[0021] The gear train may be provided in plural numbers, and each final pinion of the gear train may be supported by a planet carrier so that the relative positions between the final pinions are kept constant and only the final pinions are allowed to rotate on their own.

[0022] The gear train may include at least four pinion gears that are continuously meshed, and rotation shafts of the pinion gears may be rotatably supported by the plurality of connecting rods that are continuously connected, respectively.

[0023] The gear train may be configured such that a relative phase between the sun gear and the ring gear is kept constant with respect to relative movement of a rotation axis of the sun gear and a rotation axis of the ring gear in an up-and-down direction.

[0024] A pinion among the pinions meshing with the ring gear, ie, a final pinion, may be supported by a planet carrier to restrict the final pinion from revolving orbitally relative to the sun gear and to allow only the final pinion to rotate on its own.

[0025] The gear train may be provided in plurality, and the plurality of gear trains may be symmetrically arranged along the circumferential direction of the sun gear.

[0026] The gear train may be arranged in plurality, and the plurality of gear trains may be arranged asymmetrically along the circumferential direction of the sun gear.

[0027] A power source may be connected to the sun gear, a load may be connected to the ring gear, and the power of the power source may be reduced in speed and transmitted to the load.

[0028] A power source may be connected to the ring gear, a load may be connected to the sun gear, and power of the power source may be accelerated and transmitted to the load.

[0029] A rotating shaft of a motor may be connected to the sun gear, and a wheel may be connected to the ring gear.

[0030] (III) Beneficial effects

[0031] In the case of application to a vehicle, the present invention can ensure good climbing and acceleration performance by appropriately decelerating the input power, and can also separate the power source such as a motor from the wheel that receives severe impact and vibration, thereby improving the durability of the power source and ensuring a good ride feel by reducing the unsprung mass of the vehicle. The present invention can also continuously transmit power from the power source in correspondence with the vertical movement of the wheel without using a constant velocity joint, etc., thereby reducing the space between the power source and the wheel, and ultimately ensuring good space utilization between the left wheel and the right wheel.

[0032] Furthermore, the present invention, as a device for decelerating or accelerating a rotational force outside a vehicle, can form a continuous power transmission state while absorbing the free relative displacement between the rotational axis of the power source and the rotational axis of the load. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 2 are views illustrating a first embodiment of a universal driving device according to the present invention.

[0034] Figure 2 2 are views illustrating a second embodiment of the universal driving device according to the present invention.

[0035] Figure 3 is to compare the ring gear with respect to Figure 2 The second embodiment is shown in a lowered state.

[0036] Figure 4 is to compare the ring gear with respect to Figure 2 The second embodiment is shown in a raised state.

[0037] Figure 5 It is shown Figure 2 The second embodiment shown is an example of application to a vehicle, and is a view comparing the lifting and lowering of a wheel relative to a sun gear.

[0038] Figure 6 It is shown Figure 2 1 is a modified example of the second embodiment shown, and is a view showing a state in which the final stage pinion gear is meshed with the outer side of the ring gear.

[0039] Figure 7 1 is a diagram describing a third embodiment of the universal driving device according to the present invention, and is a diagram comparing a state in which a ring gear is raised and lowered relative to a sun gear.

[0040] Figure 8 2 is a view describing an example in which the universal driving device according to the present invention is applied to a vehicle.

[0041] Description of Reference Numerals

[0042] 1: Gear train 3: First connecting rod

[0043] 5: Second connecting rod 7: Joint pinion

[0044] 9: Final pinion 11: First intermediate pinion

[0045] 13: Second intermediate pinion S: Sun gear

[0046] C: Planet carrier R: Ring gear

[0047] M: Motor W: Wheel

[0048] U: Universal drive DETAILED DESCRIPTION

[0049] The specific structural description or functional description of the embodiments of the present invention disclosed in this specification or application is merely exemplified for the purpose of illustrating the embodiments according to the present invention, which can be implemented in various ways and should not be construed as limiting the embodiments described in this specification or application.

[0050] The embodiments of the present invention may be modified in various ways and may have various forms, therefore, specific embodiments will be shown in the drawings and the present specification or application will be described in detail. However, this is not intended to limit the embodiments of the concepts according to the present invention to specific disclosed forms, but should be understood to include all changes, equivalents and substitutes included in the technical ideas and technical scope of the present invention.

[0051] The terms first and / or second etc. can be used to describe various constituent elements, but the terms should not limit the constituent elements. The terms are only used to distinguish one constituent element from another constituent element. For example, without departing from the scope of rights of the concept according to the present invention, the first constituent element can be referred to as the second constituent element. Similarly, the second constituent element can also be referred to as the first constituent element.

[0052] When it is mentioned that a constituent element is "connected to" or "coupled to" different constituent elements, it should be understood that the constituent element can be directly connected to or coupled to different constituent elements, and other constituent elements may exist in between. On the other hand, when it is mentioned that a constituent element is "directly connected to" or "directly coupled to" different constituent elements, it should be understood that no other constituent elements exist in between. Other expressions describing the relationship between constituent elements, such as "between" and "directly between" or "adjacent to" and "directly adjacent to" should also be interpreted in the same way.

[0053] The terms used in this specification are only used to describe specific embodiments and are not intended to limit the present invention. Unless clearly indicated in the context, singular expressions include plural expressions. It should be understood that in this specification, the terms "including", "having", etc. are intended to specify the existence of the described features, numbers, steps, operations, constituent elements, parts or combinations thereof, without excluding the existence or possibility of adding one or more other features, numbers, steps, operations, constituent elements or combinations thereof in advance.

[0054] Unless otherwise defined, all terms used in this specification, including technical or scientific terms, have the same meaning as those commonly understood by ordinary technicians in the field to which the present invention belongs. Terms such as those defined in general dictionaries should be interpreted as having the same meaning as in the context of the relevant technology, and should not be interpreted as having an ideal or overly formal meaning unless otherwise clearly defined in this specification.

[0055] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to describe the present invention in detail. The same reference numerals shown in the various drawings represent the same components.

[0056] Figures 1 to 7 All the embodiments of the universal drive device of the present invention shown in common include: a sun gear S, which is rotatably arranged; a ring gear R, which is arranged on a rotation plane parallel to the rotation plane of the sun gear S, and the rotation axis of the ring gear R is capable of relative movement relative to the rotation axis of the sun gear S; a gear train 1, which is constructed to allow relative movement between the rotation axis of the sun gear S and the rotation axis of the ring gear R, and to form a continuous power transmission state between the sun gear S and the ring gear R.

[0057] That is, the present invention is configured such that the rotation axis of the sun gear S and the rotation axis of the ring gear R remain parallel to each other and allow relative displacement, and despite the relative displacement between the sun gear S and the ring gear R, the gear system 1 continues to maintain a state in which power can be transmitted between the sun gear S and the ring gear R.

[0058] The gear train 1 includes a plurality of connecting rods, and an angle formed between the plurality of connecting rods connected to each other varies according to a relative movement between a rotation axis of the sun gear S and a rotation axis of the ring gear R.

[0059] The plurality of connecting rods may include a first connecting rod 3 connected to the rotation shaft of the sun gear S and a second connecting rod 5 connected to the first connecting rod 3. The first connecting rod 3 and the second connecting rod 5 are provided with rotation shafts of a series of gears that transmit power from the sun gear S to the ring gear R. A joint pinion 7 having the same number of teeth as the sun gear S is provided at the connection portion of the first connecting rod 3 and the second connecting rod 5.

[0060] The second connecting rod 5 is provided with a final pinion 9 meshing with the ring gear R, and the final pinion 9 has the same number of teeth as the sun gear S.

[0061] Therefore, the final pinion 9 can transmit power from the sun gear S to the ring gear R through a series of gears from the sun gear S to the joint pinion 7 and from the joint pinion 7 to the final pinion 9. The sun gear S, the joint pinion 7 and the final pinion 9 may have the same number of teeth.

[0062] As described above, only when the sun gear S, the connecting pinion 7 and the final pinion 9, which are gears arranged at even positions away from the sun gear S in a series of gears constituting the gear train 1, have the same number of teeth, when the gear train 1 is set in multiple positions, the ring gear R can move relative to the sun gear S and maintain a continuous power transmission state between the sun gear S and the ring gear R.

[0063] The first intermediate pinion 11 having a rotation axis provided on the first connecting rod 3 meshes with the sun gear S and the joint pinion 7. The second intermediate pinion 13 having a rotation axis provided on the second connecting rod 5 meshes with the joint pinion 7 and the final pinion 9.

[0064] Therefore, the power from the sun gear S can be transmitted to the ring gear R through the first intermediate pinion 11, the joint pinion 7, the second intermediate pinion 13 and the final pinion 9 in sequence.

[0065] When multiple gear trains 1 are arranged as described above, the final pinions 9 of the multiple gear trains 1 are rotatably supported by the planet carrier C so that the relative positions between the final pinions 9 of the multiple gear trains 1 remain constant and only the final pinions 9 are allowed to rotate.

[0066] Even if Figure 1 In the structure shown, the final pinion 9 meshing with the ring gear R is also supported by the planet carrier C to restrict the final pinion 9 from revolving relative to the sun gear S and only allow the final pinion to rotate on its own.

[0067] On the other hand, Figure 2 As shown, the final pinion 9 may be configured to mesh with the inner side of the ring gear R. Figure 6 In the illustrated variation, the final stage pinion 9 may also be configured to mesh with the outer side of the ring gear R.

[0068] Reference Figure 2 and Figure 3 When the ring gear R rises or falls relative to the sun gear S, the angle between the first connecting rod 3 and the second connecting rod 5 of each gear system 1 changes, the first intermediate pinion 11 continues to be meshed with the sun gear S, and the final pinion 9 continues to be meshed with the ring gear R, thereby achieving continuous power transmission between the sun gear S and the ring gear R.

[0069] The gear train 1 is configured such that the relative phase between the sun gear S and the ring gear R is kept constant with respect to relative movement of the rotation axis of the sun gear S and the rotation axis of the ring gear R in the up-down direction.

[0070] Here, if Figure 2 and Figure 3 As shown, the relative phase between the sun gear S and the ring gear R remains constant relative to the relative movement between the sun gear S and the ring gear R, which can be represented by the rotational direction phase of the points PS and PR marked at the 0 degree position of the sun gear S and the ring gear R being constantly maintained at the 0 degree position even when the ring gear R rises or falls relative to the sun gear S.

[0071] That is, as shown in the present invention, in the case where the sun gear S and the ring gear R are connected through a plurality of gear trains 1, the gear trains 1 need to be constructed so that the relative phase between the sun gear S and the ring gear R is kept constant when the ring gear R is raised and lowered relative to the sun gear S. In addition, the gear trains 1 need to be constructed so that the sun gear S, the joint pinion 7, and the final pinion 9, which are gears disposed at even-numbered positions from the sun gear S as described above, have the same number of teeth.

[0072] like Figures 2 to 7 In the illustrated embodiment, a plurality of the gear trains 1 may be provided, and the plurality of gear trains 1 may be symmetrical along the circumferential direction of the sun gear S.

[0073] In addition, the plurality of gear trains 1 may be asymmetric along the circumferential direction of the sun gear S.

[0074] For reference, in Figure 7In the third embodiment shown, four gear trains 1 are provided, and the first intermediate pinion gears 11 and the second intermediate pinion gears 13 have different sizes and different numbers of teeth.

[0075] That is, it is only necessary for the joint pinion 7 and the final stage pinion 9 to have the same number of teeth as the sun gear S, while the first intermediate pinion 11 and the second intermediate pinion 13 may have a different number of teeth from the sun gear S or may be different from each other.

[0076] It may be configured that a power source is connected to the sun gear S, and a load is connected to the ring gear R, so that power from the power source is decelerated and transmitted to the load.

[0077] Furthermore, it may be configured that a power source is connected to the ring gear R, and a load is connected to the sun gear S, so that power from the power source is accelerated and transmitted to the load.

[0078] In addition, the rotating shaft of the motor M is connected to the sun gear S, and the wheel W is connected to the ring gear R, so that Figure 8 As shown, the universal driving device U of the present invention can be used as a driving device of a vehicle.

[0079] In this case, since it can be configured so that the power input to the sun gear S can be appropriately decelerated to the ring gear R, good hill climbing and acceleration performance of the vehicle can be ensured.

[0080] Furthermore, since the motor M can be separately disposed outside the wheel W that receives severe shock and vibration, rather than being disposed inside the wheel W, the durability of the motor M can be improved and a good ride can be ensured by reducing the unsprung mass of the vehicle.

[0081] Furthermore, the ring gear R connected to the wheel W as described above can be raised and lowered relative to the sun gear S connected to the power source, and constant power transmission can be performed, thereby enabling continuous power transmission from the power source corresponding to the vertical movement of the wheel W without using a constant velocity joint or the like in the prior art. Therefore, the space between the power source and the wheel W can be reduced, ultimately ensuring good space utilization between the left wheel W and the right wheel W.

[0082] While the present invention has been illustrated and described with respect to specific embodiments, it will be apparent to those skilled in the art that various modifications and changes may be made to the present invention without departing from the technical concept of the invention as defined in the appended claims.

Claims

1. A universal driving device, characterized in that: include: a sun gear rotatably disposed; a ring gear, wherein the ring gear shaft is movable relative to the sun gear shaft; as well as a gear train that meshes the sun gear with the ring gear and allows relative movement between the sun gear shaft and the ring gear shaft and forms a continuous power transmission state between the sun gear and the ring gear, wherein the gear train includes a plurality of connecting rods, the connection angles of the plurality of connecting rods vary according to the relative movement between the sun gear shaft and the ring gear shaft, and The multiple connecting rods include: a first connecting rod, whose first end is connected to the rotating shaft of the sun gear; and a second connecting rod, whose first end is connected to the second end of the first connecting rod, and a connecting pinion with the same number of teeth as the sun gear is provided at the connecting part between the second end of the first connecting rod and the first end of the second connecting rod.

2. The universal driving device according to claim 1, characterized in that: A final pinion gear meshing with the ring gear is provided on the second end of the second connecting rod. The final stage pinion gear has the same number of teeth as the sun gear.

3. The universal driving device according to claim 2, characterized in that: The gear train further comprises a series of gears, The final pinion transmits power to the ring gear through the series of gears connecting from the sun gear to the joint pinion.

4. The universal driving device according to claim 2, characterized in that: The gear train is provided in plural numbers.

5. The universal driving device according to claim 4, characterized in that: The rotation shafts of the final-stage pinion gears of the plurality of gear trains are supported by a planet carrier.

6. The universal driving device according to claim 1, characterized in that: The gear train further comprises a series of gears, A rotating shaft for transmitting power from the sun gear to the series of gears of the ring gear is provided on the first connecting rod and the second connecting rod.

7. The universal driving device according to claim 6, characterized in that: Gears disposed at even-numbered positions from the sun gear among a series of gears constituting the gear train have the same number of teeth as the sun gear.

8. The universal driving device according to claim 7, characterized in that: The gear disposed at a second position from the sun gear is a joint pinion disposed coaxially with the rotation axis of the first connecting rod and the rotation axis of the second connecting rod, The gear disposed at the fourth position from the sun gear is a final pinion gear meshing with the ring gear.

9. The universal driving device according to claim 8, characterized in that: A first intermediate pinion having a rotation axis provided on the first connecting rod meshes with the sun gear and the joint pinion, A second intermediate pinion having a rotation axis provided on the second connecting rod meshes with the joint pinion and the final stage pinion.

10. The universal driving device according to claim 8, characterized in that: The gear train is provided in a plurality of Each final pinion of the gear train is supported by a planet carrier so that the relative positions between the final pinions are kept constant and only the final pinions are allowed to rotate on their own.

11. The universal driving device according to claim 1, characterized in that: The gear train includes at least four pinion gears meshing in series, The rotating shafts of the pinion gears are rotatably supported by the plurality of connecting rods connected in series, respectively.

12. The universal driving device according to claim 11, characterized in that: The gear train is configured such that a relative phase between the sun gear and the ring gear is kept constant with respect to relative movement of a rotation axis of the sun gear and a rotation axis of the ring gear in an up-and-down direction.

13. The universal driving device according to claim 11, characterized in that: A pinion gear meshing with the ring gear, namely a final pinion gear, among the pinion gears is supported by a planet carrier so as to restrict the final pinion gear from revolving orbitally relative to the sun gear and only allow the final pinion gear to rotate on its own.

14. The universal driving device according to claim 1, characterized in that: The gear train is provided in a plurality of The plurality of gear trains are symmetrically arranged along the circumferential direction of the sun gear.

15. The universal driving device according to claim 1, characterized in that: The gear train is provided in a plurality of The plurality of gear trains are asymmetrically arranged along the circumferential direction of the sun gear.

16. The universal driving device according to claim 1, characterized in that: A power source is connected to the sun gear, A load is connected to the ring gear, and the power of the power source is decelerated and transmitted to the load.

17. The universal driving device according to claim 1, characterized in that: A power source is connected to the ring gear, A load is connected to the sun gear, and the power of the power source is accelerated and transmitted to the load.

18. The universal driving device according to claim 1, characterized in that: The rotating shaft of the motor is connected to the sun gear, Wheels are connected to the ring gear.

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