Assembly

Abstract

In an assembly having a power transmission mechanism therein, the inter-stage ratio at the time of shifting can be reduced. The assembly includes an input element, an output element, first to third engagement elements, a first planetary gear mechanism in which first to third rotation elements are sequentially arranged on a collinear diagram, and a second planetary gear mechanism in which fourth to sixth rotation elements are sequentially arranged on the collinear diagram. The input element is connected with the first rotating element, the output element is connected with the second rotating element and the sixth rotating element, one side of the first clamping element is connected with the fifth rotating element, and the other side of the first clamping element is fixed; one side of the second clamping element is connected with the third rotating element and the fourth rotating element, the other side of the second clamping element is fixed, and the third clamping element is connected with two rotating elements which are not connected with each other and selected from the first rotating element to the sixth rotating element.

Description

Technical Field

[0001] The present invention relates to a component having a power transmission mechanism therein. Background Art

[0002] Patent Document 1 discloses an automatic transmission assembly for electric vehicles with two forward speeds. In this assembly, by switching the engagement states of two friction clutches, a first speed and a second speed with a speed ratio (=input speed / output speed) lower than the first speed can be achieved.

[0003] Patent Documents 2 to 4 also disclose similar components.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: German Patent No. 102019107517

[0007] Patent Document 2: German Patent Application Publication No. 102019119947

[0008] Patent Document 3: German Patent Application Publication No. 102019119949

[0009] Patent Document 4: Chinese Utility Model Specification No. 207333597

[0010] Problems to be solved by the invention

[0011] In an automatic transmission assembly for an electric vehicle with two forward gears, the greater the gear ratio of the first gear, the greater the torque amplification effect caused by deceleration, so the greater the gear ratio of the first gear, the smaller the maximum torque of the motor can be, and a smaller motor can be selected. In contrast, the smaller the gear ratio of the second gear, the lower the motor speed at a certain vehicle speed, which is beneficial when cruising at high speed.

[0012] However, if the speed ratios of 1st gear and 2nd gear are set separately based on the above-mentioned design concept, the inter-stage ratio when switching between 1st gear and 2nd gear (=1st gear speed ratio / 2nd gear speed ratio) becomes larger, and the acceleration / deceleration of the output rotation during speed change becomes larger. Summary of the invention

[0013] The present invention has been made in view of such a technical problem, and an object of the present invention is to reduce the step ratio during speed change in a unit having a power transmission mechanism therein.

[0014] According to one aspect of the present invention, the component comprises:

[0015] Input components;

[0016] Output components;

[0017] a first engaging element;

[0018] a second engaging element;

[0019] a third engaging element;

[0020] A first planetary gear mechanism, which has a first rotating element, a second rotating element, and a third rotating element arranged in sequence on a collinear diagram;

[0021] The second planetary gear mechanism has a fourth rotation element, a fifth rotation element, and a sixth rotation element arranged in sequence on the collinear diagram.

[0022] The input element is connected to the first rotating element,

[0023] The output element is connected with the second rotating element and the sixth rotating element,

[0024] One side of the first engaging element is connected to the fifth rotating element,

[0025] The other side of the first engaging element is fixed,

[0026] One side of the second engaging element is connected to the third rotating element and the fourth rotating element.

[0027] The other side of the second engaging element is fixed,

[0028] The third engagement element connects two rotation elements selected from the first to sixth rotation elements that are not connected to each other.

[0029] Effects of the Invention

[0030] According to the above-mentioned mode, by changing the engagement state of the first to third engagement elements, three or more speed stages can be realized. As a result, the inter-stage ratio becomes smaller than that of the forward 2-speed assembly, and the acceleration and deceleration of the output rotation during the speed change can be suppressed to be smaller than that of the forward 2-speed assembly. In addition, a more appropriate speed ratio can be set for each speed stage.

[0031] When the first and second engagement elements are released and the third engagement element is engaged, the speed ratio becomes 1, and all the rotating elements constituting the first and second planetary gear mechanisms rotate at the same speed, thereby reducing power transmission loss caused by the speed difference between the rotating elements. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of components of an embodiment of the present invention.

[0033] Figure 2 It is an engagement table showing the engagement state of each engagement element in each speed stage.

[0034] Figure 3 is a colinear diagram of the components.

[0035] Figure 4 It is a cross-sectional view of a specific structural example of a component.

[0036] Figure 5A This is a schematic diagram of a modified example of the assembly.

[0037] Figure 5B This is a schematic diagram of a modified example of the assembly.

[0038] Figure 5C This is a schematic diagram of a modified example of the assembly.

[0039] Figure 5D This is a schematic diagram of a modified example of the assembly. DETAILED DESCRIPTION

[0040] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the definitions of terms used in this specification are as follows.

[0041] The term "unit" refers to an entire device having a power transmission mechanism such as a gear mechanism or a differential gear mechanism inside, and includes a motor unit having a motor and a power transmission mechanism, an automatic transmission unit, a speed reducer unit, and the like.

[0042] The "speed ratio" is the value obtained by dividing the input rotation speed of the component by the output rotation speed. The "input rotation" includes not only the rotation input to the component from the power source outside the component, but also the rotation input to the component from the power source inside the component.

[0043] The “step ratio” is a value obtained by dividing the larger speed ratio (for low speed) by the smaller speed ratio (for high speed) of two speed ratios achieved by the assembly.

[0044] “Axial direction” refers to the axial direction of the rotating shaft of a component constituting an assembly. The component is a motor, a gear mechanism, a differential gear mechanism, etc. “Radial direction” refers to the radial direction starting from the central axis of the rotating shaft.

[0045] The “housing” refers to a housing that houses the motor, inverter, and power transmission mechanism, and is composed of one or more housings. The housing that houses the motor, the inverter, and the power transmission mechanism are formed in one piece, which is called “3 in 1”.

[0046] The term “electric motor” refers to a rotating electrical machine having a motor function, and may have a generator function in addition to the motor function.

[0047] “Element (factor) A is connected to element (factor) B” means that element A is connected to element B upstream or downstream in a manner that power can be transmitted between element A and element B. The input side of power is upstream, and the output side of power is downstream. Element A is not limited to being connected to element B directly or via other components, and may be connected via a clutch or the like.

[0048] “Element A is fixed to element B” includes both a method in which element A is directly fixed to element B and a method in which element A is fixed to element B via element C other than elements A and B. “Element A is fixed” means that element A is fixed to another element and is in a non-rotatable state.

[0049] “Element A and element B overlap when viewed in a specified direction” means that element A and element B are arranged in a specified direction (axial direction, radial direction, gravity direction, etc.), and when viewed from the specified direction, element A and element B at least partially overlap. It is synonymous with “element A and element B overlap in a specified direction”. When element A and element B overlap when viewed in the axial direction, element A is coaxial with element B. When element A and element B are depicted in a specified direction in the figure, it means that element A and element B overlap when viewed in the specified direction.

[0050] In contrast, “elements A and B do not overlap when viewed in a specified direction” means that elements A and B are not arranged in a specified direction (axial direction, radial direction, gravity direction, vehicle travel direction, etc.), and elements A and B do not have overlapping parts when viewed from the specified direction. This is synonymous with “elements A and B do not overlap in a specified direction.” When elements A and B are depicted as not being arranged in a specified direction in a figure, this means that elements A and B do not overlap when viewed in the specified direction.

[0051] “Element A is located between element B and element C when viewed in a specified direction” means that when viewed from a specified direction (axial direction, radial direction, gravity direction, etc.), element A is observed to be located between element B and element C. For example, when element B, element A, and element C are arranged in this order along the axial direction, element A can be observed to be between element B and element C when viewed in the radial direction, so it can be said that element A is located between element B and element C. Element A does not necessarily overlap with elements B and C when viewed in the axial direction. When element A is depicted as being between element B and element C in the figure, it means that element A is located between element B and element C when viewed in the specified direction.

[0052] “Element A is located radially outside (or inside) element B” means that the radial position of element A is further outside (or inside) than the radial position of element B. In addition to the case where element A and element B have overlapping portions when viewed radially, it also includes the case where element A and element B have different axial positions and element A and element B have no overlapping portions.

[0053] "Closely arranged" refers to a state in which two elements have an overlapping portion when viewed axially or radially, and no other element is clamped between the two elements. For example, "two engaging elements are closely arranged" means that no planetary gear mechanism is arranged between the two engaging elements. If no other element is depicted between element A and element B in the figure, it means that element A and element B are closely arranged.

[0054] "One side of the engaging element" and "the other side of the engaging element" refer to two elements contained in the engaging element, which cannot rotate relative to each other when the engaging element is in the engaged state, but can rotate relative to each other when the engaging element is in the released state. "One side of the engaging element" and "the other side of the engaging element" can be a combination of rotating elements or a combination of rotating elements and non-rotating elements. Usually, the former is called a clutch and the latter is called a brake. In addition, "one side of the engaging element" refers to either "one side of the engaging element" or "the other side of the engaging element".

[0055] Other terms are defined as appropriate in the main text of the specification.

[0056] Figure 1 1 is a schematic diagram showing the basic structure of an assembly 100 according to an embodiment of the present invention. The assembly 100 is a three-speed forward automatic transmission assembly for a hybrid vehicle that changes the speed of the rotation input to the input element In from the electric motor MTR and / or the engine ENG as a power source at a speed ratio corresponding to the speed stage, and transmits the rotation from the output element Out to the driving wheels (not shown). In this example, the input element In is a rotating shaft, and the output element Out is a gear.

[0057] The assembly 100 is an assembly that accommodates an input element In, first and second planetary gear mechanisms PG1 and PG2, first to fourth engagement elements B1, B2, CL1, and CL2, an output element Out, and a motor MTR in a housing 1. The housing 1 is fixed to the vehicle so as not to rotate. In addition, the assembly 100 may be a three-in-one (3in1) assembly in which the inverter INV is also accommodated in the housing 1.

[0058] One end of the input element In is connected to the output shaft of the motor MTR, and the input element In is rotated by the power input from the motor MTR. The rotation speed of the input element In is the input rotation speed of the assembly 100. The motor MTR is electrically connected to a battery (not shown) outside the assembly 100 via the inverter INV, and receives power supply from the battery to function as a motor. In addition, the motor MTR can also function as a generator.

[0059] The other end of the input element In is connected to the engine ENG outside the assembly 100 via the fourth engagement element CL2. When the fourth engagement element CL2 is engaged, the input element In can be rotated by the input from the engine ENG. The generator GEN is connected to the output shaft of the engine ENG, and the generator GEN can generate electricity using part of the power of the engine ENG.

[0060] The first planetary gear mechanism PG1 is a single pinion planetary gear mechanism, which includes: a first sun gear S1 as a first rotating element, a plurality of first pinions P1, a first planetary gear carrier C1 as a second rotating element that supports the plurality of first pinions P1 and allows them to rotate freely, and a first ring gear R1 as a third rotating element. The first sun gear S1 meshes with the plurality of first pinions P1, and the plurality of first pinions P1 meshes with the first ring gear R1.

[0061] The second planetary gear mechanism PG2 is a single pinion planetary gear mechanism, which has: a second sun gear S2 as a fourth rotation element, a plurality of second pinions P2, a second planetary gear carrier C2 as a fifth rotation element that supports the plurality of second pinions P2 and allows them to rotate freely, and a second ring gear R2 as a sixth rotation element. The second sun gear S2 meshes with the plurality of second pinions P2, and the plurality of second pinions P2 mesh with the second ring gear R2.

[0062] The first sun gear S1 is connected to the input element In. The first planetary gear carrier C1 is connected to the second ring gear R2 and the output element Out. The first ring gear R1 is connected to the second sun gear S2.

[0063] The rotational speed of the output element Out is the output rotational speed of the assembly 100 .

[0064] The first engagement element B1 is a brake. The first engagement element B1 is composed of a selectable one-way clutch that can select a one-way clutch state and an engagement state by an electric actuator. The first engagement element B1 can also be composed of a hydraulic or electric clutch. If the two parts of the first engagement element B1 that engage when the first engagement element B1 is in the engagement state are set to one side and the other side, one side is connected to the second planetary gear carrier C2, and the other side is fixed to the housing 1. Therefore, if the first engagement element B1 is engaged, the second planetary gear carrier C2 can be fixed to the housing 1.

[0065] The second engagement element B2 is a brake. The second engagement element B2 is composed of a hydraulic or electric clutch. If the two parts of the second engagement element B2 that engage when the second engagement element B2 is in the engaged state are set to one side and the other side, one side is connected to the first ring gear R1 and the second sun gear S2, and the other side is fixed to the housing 1. Therefore, if the second engagement element B2 is engaged, the first ring gear R1 and the second sun gear S2 can be fixed to the housing 1.

[0066] The third engagement element CL1 is a clutch. The third engagement element CL1 is composed of a hydraulic or electric clutch. If the two parts of the third engagement element CL1 that are engaged when the third engagement element CL1 is in an engaged state are set as one side and the other side, one side is connected to the input element In and the first sun gear S1, and the other side is connected to the output element Out, the first planetary gear carrier C1, and the second ring gear R2. Therefore, if the third engagement element CL1 is engaged, the input element In and the first sun gear S1 are connected to the output element Out, the first planetary gear carrier C1, and the second ring gear R2.

[0067] Figure 2 : is an engagement table showing the relationship between the engagement states of the first to third engagement elements B1, B2, CL1 and the speed stages realized in the assembly 100. In the table, a black circle indicates an engaged state, and no circle indicates a released state.

[0068] As shown in the engagement table, the first gear is achieved by engaging the first engagement element B1 and releasing the second and third engagement elements B2 and CL1. The second gear is achieved by engaging the second engagement element B2 and releasing the first and third engagement elements B1 and CL1. The third gear is achieved by engaging the third engagement element CL1 and releasing the first and second engagement elements B1 and B2.

[0069] in addition, Figure 3 1 is a co-linear diagram of the assembly 100. In the figure, vertical lines l1 to l4 correspond to the rotating elements of the first and second planetary gear mechanisms PG1 and PG2. With respect to the first planetary gear mechanism PG1, the first sun gear S1, the first planetary gear carrier C1, and the first ring gear R1 are arranged in sequence from the left side of the figure. With respect to the second planetary gear mechanism PG2, the second sun gear S2, the second planetary gear carrier C2, and the second ring gear R2 are arranged in sequence from the right side of the figure.

[0070] Since the first planetary gear carrier C1 and the second ring gear R2 are connected to each other, they correspond to the same vertical line l2. Similarly, since the first ring gear R1 and the second sun gear S2 are also connected to each other, they correspond to the same vertical line l4. When the interval between the vertical line l1 and the vertical line l2 is set to 1, the interval α1 between the vertical line l2 and the vertical line l4 is the value obtained by dividing the number of teeth of the first sun gear S1 by the number of teeth of the first ring gear R1. When the interval between the vertical line l3 and the vertical line l4 is set to 1, the interval α2 between the vertical line l2 and the vertical line l3 is the value obtained by dividing the number of teeth of the second sun gear S2 by the number of teeth of the second ring gear R2.

[0071] Straight lines L1 to L3 corresponding to the respective speed stages are plotted in the collinear diagram. The rotation speed of each rotating element is represented by the ordinate of the intersection of the straight lines L1 to L3 corresponding to the respective speed stages and the vertical lines l1 to l4.

[0072] In the first gear, the second planetary gear carrier C2 is fixed to the housing 1 by engaging the first engagement element B1, and the rotation speed of the second planetary gear carrier C2 is zero. Therefore, the straight line L1 corresponding to the first gear is a straight line passing through the point X1.

[0073] When the rotational speed of the first sun gear S1 is set to r1 and the rotational speeds of the first planetary gear carrier C1 and the second ring gear R2 are set to r4, the input rotational speed rin of the component 100 is equal to the rotational speed r1 of the first sun gear S1, and the output rotational speed rout is equal to the rotational speed r4 of the first planetary gear carrier C1 and the second ring gear R2, so the speed ratio in the first gear becomes rin / rout = r1 / r4.

[0074] In the 2nd gear, the first ring gear R1 and the second sun gear S2 are fixed to the housing 1 by engaging the second engagement element B2, and the rotation speeds of the first ring gear R1 and the second sun gear S2 are zero. Therefore, the straight line L2 corresponding to the 2nd gear passes through the point X2.

[0075] When the rotation speed of the first sun gear S1 is set to r2, and the rotation speeds of the first planetary gear carrier C1 and the second ring gear R2 are set to r4, the input rotation speed rin of the assembly 100 is equal to the rotation speed r2 of the first sun gear S1, and the output rotation speed rout is equal to the rotation speed r4 of the first planetary gear carrier C1 and the second ring gear R2, so the speed ratio in the second gear becomes rin / rout = r2 / r4. Since r2 is smaller than r1, the speed ratio of the second gear is smaller than the speed ratio of the first gear.

[0076] In the 3rd gear, the third engagement element CL1 is engaged, so that the input element In and the first sun gear S1 are connected to the output element Out, the first planetary gear carrier C1 and the second ring gear R2, so that the rotation speeds of the various rotating elements are all equal to r3. As a result, the input rotation speed rin and the output rotation speed rout are also equal, and the speed ratio in the 3rd gear becomes 1, which is smaller than that of the 2nd gear.

[0077] Therefore, in the assembly 100, three speed stages including the third stage with a speed ratio of 1 can be realized, so that the step ratio becomes smaller than that of the assembly with two forward stages, and the acceleration and deceleration of the output rotation during the speed change can be suppressed to be smaller than that of the assembly with two forward stages. In addition, since the first to third stages can be used for low speed, medium speed, and high speed, respectively, an appropriate speed ratio can be set according to the speed range.

[0078] In addition, the speed ratio is 1 in the third gear. That is, since all the rotating elements constituting the first and second planetary gear mechanisms PG1 and PG2 rotate at the same speed, the power transmission loss caused by the speed difference between the rotating elements can be reduced. On this basis, the input element In and the output element Out are connected, and the power transmission path from the input element In to the output element Out becomes the shortest, which can further reduce the power transmission loss.

[0079] Figure 4 Indicates that it corresponds to Figure 1 The schematic diagram is a cross-section of a specific configuration example of a component. The same reference numerals are given to components that have already been described.

[0080] The connection relationship between the rotation elements, input element In and output element Out of the first and second planetary gear mechanisms PG1 and PG2 is as follows: Figure 1 The schematic diagram is the same as that of FIG. Figure 1 The following description will focus on the specific structures of the first to third engaging elements B1, B2, and CL1 which are not shown in the schematic diagram.

[0081] The first engaging element B1 is a selectable one-way clutch in this structural example. The first engaging element B1 is composed of a pair of ratchet mechanisms that can switch the operating state by an electric actuator (not shown) and limit the rotation direction in different directions. A receiving portion 41 is provided on the outer edge of the second planetary gear carrier C2, and a plurality of recessed portions for receiving the claws of the pair of latch mechanisms of the first engaging element B1 are arranged in the circumferential direction on the outer periphery of the receiving portion 41.

[0082] When only one of the ratchet mechanisms is actuated, the first engaging element B1 becomes a one-way clutch state, and the second planetary gear carrier C2 can only rotate in one direction. In addition, when both ratchet mechanisms are actuated, the first engaging element B1 becomes an engaged state, and the second planetary gear carrier C2 is fixed to the housing 1 via the first engaging element B1.

[0083] The first engagement element B1 is an engagement element that is engaged when the first gear is realized, that is, an engagement element that requires less control of the engagement capacity (also referred to as "torque capacity" in the sense of the torque that can be transmitted, the same below), so even if the first engagement element B1 is composed of a one-way clutch, smooth starting performance can be ensured. In addition, compared with the case of using a multi-plate clutch, the structure of the assembly 100 can be simplified.

[0084] Furthermore, by configuring the first engagement element B1 to be selectable not only in the one-way clutch state but also in the engaged state, the first gear can be used as a reverse gear when the motor MTR is reversed to cause the vehicle to travel reversely.

[0085] In addition, the first engagement element B1 may be configured to be able to select a release state. In addition, the first engagement element B1 may be configured by a hydraulic or electric multi-plate clutch like other engagement elements.

[0086] The second engagement element B2 is a hydraulic multi-plate clutch in this configuration example and includes a hub 21 , a plurality of inner friction plates 22 and outer friction plates 23 arranged alternately, a roller 24 , a return spring 25 , and a hydraulic actuator 26 .

[0087] The hub 21 is a bottomed cylindrical shape consisting of a base 21a and a cylindrical portion 21b extending axially from the outer edge of the base 21a. An inner friction plate 22 is splined to the outer periphery of the cylindrical portion 21b. The inner friction plate 22 is relatively displaceable in the axial direction and cannot rotate relative to the cylindrical portion 21b. The inner periphery of the base 21a is splined to the connecting portion 51 extending axially from the second sun gear S2, so that the hub 21 and the second sun gear S2 cannot rotate relative to each other.

[0088] The roller 24 is cylindrical and includes a cylindrical portion 24a. The outer friction plate 23 is spline-fitted to the inner periphery of the cylindrical portion 24a so as to be movable in the axial direction. The outer friction plate 23 is relatively displaceable in the axial direction but non-rotatable relative to the cylindrical portion 24a.

[0089] One end of the drum 24 is fixed to the intermediate wall 2 as a wall portion extending inward from the housing 1. In this example, the drum 24 and the intermediate wall 2 are formed integrally.

[0090] The intermediate wall 2 has a portion located between the first engaging element B1 and the second engaging element B2 in radial view. By fixing the roller 24 of the second engaging element B2 to such an intermediate wall 2, the second engaging element B2 can be easily fixed to the housing 1 while utilizing the free space in the housing 1. In addition, the intermediate wall 2 has openings on the inner circumference side through which the input element In, the connecting portion 34c of the roller 34 of the third engaging element CL1 described later, the intermediate member 52, and the connecting portion 51 of the second sun gear S2 are inserted.

[0091] The hydraulic actuator 26 is an actuator for driving the second engagement element B2. The hydraulic actuator 26 is connected to an electric hydraulic supply unit (not shown) via a flexible pipe 61. The hydraulic supply unit is mounted on the outer periphery of the housing 1. When oil is supplied from the hydraulic supply unit to the oil chamber 261, the piston 262 is pushed out in the axial direction, the inner friction plate 22 and the outer friction plate 23 are pressed and cannot rotate relative to each other, and the second engagement element B2 becomes engaged.

[0092] A return spring 25 is disposed between the piston 262 and the intermediate wall 2. When oil is not supplied to the oil chamber 261, the piston 262 is pushed back by the spring force of the return spring 25, the inner friction plate 22 and the outer friction plate 23 are separated, and the second engagement element B2 is released.

[0093] The third engagement element CL1 is a hydraulic multi-plate clutch in this configuration example and includes a hub 31 , a plurality of inner friction plates 32 and outer friction plates 33 arranged alternately, a roller 34 , a return spring 35 , and a hydraulic actuator 36 .

[0094] The hub 31 is a bottomed cylindrical shape consisting of a base 31a and a cylindrical portion 31b extending axially from the outer edge of the base 31a. An inner friction plate 32 is splined to the outer periphery of the cylindrical portion 31b. The inner friction plate 32 is relatively displaceable in the axial direction and cannot rotate relative to the cylindrical portion 31b. The inner periphery of the base 31a is splined to the input element In, so that the hub 31 and the input element In cannot rotate relative to each other.

[0095] The roller 34 is a stepped cylindrical shape consisting of a base 34a, a cylindrical portion 34b extending axially from the outer edge of the base 34a, and a connecting portion 34c extending from the inner edge of the base 34a in the opposite direction to the cylindrical portion 34b. The outer friction plate 33 is spline-fitted to the inner periphery of the cylindrical portion 34b so as to be movable in the axial direction. The outer friction plate 33 is relatively displaceable in the axial direction but cannot be relatively rotated relative to the cylindrical portion 34b.

[0096] The connecting portion 34c is spline-engaged with one end of an intermediate member 52 disposed between the input assembly In and the second sun gear S2 so as to be non-rotatable relative to each other, and the other end of the intermediate member 52 is spline-engaged with a connecting portion 53 extending axially from the first planetary gear carrier C1 so as to be non-rotatable relative to each other. Thus, the drum 34 and the first planetary gear carrier C1 are non-rotatable relative to each other.

[0097] The hydraulic actuator 36 is an actuator for driving the third engagement element CL1. The hydraulic actuator 36 is connected to an electric hydraulic supply unit (not shown) via a flexible pipe 62. The hydraulic supply unit is mounted on the outer periphery of the housing 1. When oil is supplied from the hydraulic supply unit to the oil chamber 361, the piston 362 is pushed out in the axial direction, the inner friction plate 32 and the outer friction plate 33 are pressed so as not to rotate relative to each other, and the third engagement element CL1 is in an engagement state.

[0098] A return spring 35 is disposed between the piston 362 and the hub 31. When oil is not supplied to the oil chamber 361, the piston 362 is pushed back by the spring force of the return spring 35, the inner friction plate 32 and the outer friction plate 33 are separated, and the third engagement element CL1 is released.

[0099] In addition, Figure 4 In the example shown, the oil supply to the oil chambers 261 and 361 is controlled by an electric oil pressure supply unit, but a control valve unit composed of a valve column, a solenoid valve, etc. may be provided to control the oil chambers 261 and 361 by the control valve unit.

[0100] Alternatively, an electric actuator that drives a piston with an electric motor may be provided instead of the hydraulic actuators 26 and 36. In this case, the electric actuator mechanically applies force to the piston, and thus receives a reaction force equal to the force from the piston. Therefore, when the electric actuator is used, the electric actuator is fixed to a position such as the housing 1 that can withstand the reaction force.

[0101] In addition, the relative positional relationship among the first to third engagement elements B1, B2, and CL1 is as follows.

[0102] The first engagement element B1 is arranged radially outside when viewed from the second planetary gear mechanism PG2 and has a portion overlapping with the second planetary gear mechanism PG2 when viewed radially. Thus, the axial dimension of the assembly 100 can be reduced.

[0103] Furthermore, the second engagement element B2 is arranged radially outside the third engagement element CL1 and has a portion overlapping with the third engagement element CL1 when viewed in the radial direction. Thus, the axial dimension of the assembly 100 can be reduced.

[0104] The hydraulic actuator 26 of the second engagement element B2 is arranged radially outside the third engagement element CL1 when viewed from the hydraulic actuator 36 and has a radially overlapping portion with the hydraulic actuator 36. This can reduce the axial dimension of the assembly 100.

[0105] In addition, according to this arrangement, the second engagement element B2, the third engagement element CL1, and the hydraulic actuators 26 and 36 are concentrated in one place and arranged close to each other, so that the first planetary gear mechanism PG1 and the second planetary gear mechanism PG2 can be laid out efficiently. That is, it is possible to avoid an inefficient layout in which the first planetary gear mechanism PG1 and the second planetary gear mechanism PG2 are arranged close to each other and other elements such as engagement elements and actuators are arranged between them.

[0106] Next, a modification of the assembly 100 will be described.

[0107] Figures 5A to 5D is a schematic diagram of a modified example of the assembly 100. The position of the third engagement element CL1 is Figure 1 The schematic diagram shown is different. Figure 1 In the schematic diagrams shown, the same components are denoted by the same reference numerals.

[0108] Since the third engagement element CL1 only needs to be able to achieve the speed ratio 1 by engagement, the position of the third engagement element CL1 may be Figure 1 Locations other than those shown.

[0109] Specifically, in order to Figure 3 In the co-linear diagram shown, to achieve a speed ratio of 1, the straight line L3 corresponding to the 3rd gear can be horizontal, so any two vertical lines are selected from the four vertical lines, and the rotating elements corresponding to the selected two lines are connected to each other.

[0110] In other words, from all combinations of two rotating elements selected from the six rotating elements S1, C1, R1, S2, C2, R2 of the first and second planetary gear mechanisms PG1 and PG2, select a combination of two rotating elements that are not connected to each other after removing the already connected combinations (the first planetary gear carrier C1 and the second ring gear R2, the first ring gear R1 and the second sun gear S2), and connect the two rotating elements.

[0111] exist Figure 5A In the illustrated modification, the third engagement element CL1 is arranged at a position capable of connecting the input element In and the first sun gear S1 to the first ring gear R1 and the second sun gear S2.

[0112] exist Figure 5BIn the illustrated modification, the third engagement element CL1 is arranged at a position capable of connecting the second carrier C2 to the output element Out, the first carrier C1, and the second ring gear R2.

[0113] exist Figure 5C In the illustrated modification, the third engagement element CL1 is disposed at a position capable of connecting the first ring gear R1 and the second sun gear S2 to the output element Out, the first carrier C1 and the second ring gear R2.

[0114] exist Figure 5D In the illustrated modification, the third engagement element CL1 is arranged at a position capable of connecting the first ring gear R1 and the second sun gear S2 to the second carrier C2.

[0115] According to these arrangements, since one side of the third engagement element CL1 is connected to one side of the first engagement element B1 or one side of the second engagement element B2, they can be made into a common component (integrated component). Thus, the number of components of the assembly 100 can be reduced.

[0116] Figure 5A to Figure 5C The matching table and collinear diagram of the modified example shown are Figure 2 , Figure 3 shown Figure 1 The schematic diagram is the same.

[0117] Next, the effects of the embodiment of the present invention will be described.

[0118] (1) The assembly 100 according to an embodiment of the present invention comprises:

[0119] Input element In;

[0120] Output element Out;

[0121] A first engaging element B1;

[0122] A second engaging element B2;

[0123] A third engaging element CL1;

[0124] A first planetary gear mechanism PG1, which includes a first sun gear S1, a first planetary gear carrier C1, and a first ring gear R1 arranged in sequence on a collinear diagram;

[0125] The second planetary gear mechanism PG2 includes a second sun gear S2, a second planetary gear carrier C2, and a second ring gear R2 arranged in sequence on the collinear diagram.

[0126] The input element In is connected to the first sun gear S1.

[0127] The output element Out is connected to the first planetary gear carrier C1 and the second ring gear R2.

[0128] One side of the first engagement element B1 is connected to the second planetary gear carrier C2.

[0129] The other side of the first engaging element B1 is fixed.

[0130] One side of the second engagement element B2 is connected to the first ring gear R1 and the second sun gear S2.

[0131] The other side of the second engaging element B2 is fixed.

[0132] The third meshing element CL1 connects two rotation elements selected from the first sun gear S1, the first planet carrier C1, the first ring gear R1, the second sun gear S2, the second planet carrier C2, and the second ring gear R2, which are not connected to each other.

[0133] According to this structure, by changing the engagement state of the first to third engagement elements B1, B2, CL1, three or more speed stages can be realized. As a result, the step ratio becomes smaller than that of the forward 2-speed assembly, and the acceleration and deceleration of the output rotation during the speed change can be suppressed to be smaller than that of the forward 2-speed assembly. In addition, a more appropriate speed ratio can be set for each speed stage.

[0134] When the first and second engagement elements B1 and B2 are released and the third engagement element CL1 is engaged, the speed ratio becomes 1, and all the rotating elements constituting the first and second planetary gear mechanisms PG1 and PG2 rotate at the same speed, thereby reducing power transmission loss caused by the speed difference between the rotating elements.

[0135] (2) In addition, Figure 1 In the example shown, the third engagement element CL1 connects the input element In and the output element Out.

[0136] According to this configuration, when the third engagement element CL1 is engaged, the input element In and the output element Out are connected, so that the power transmission path from the input element In to the output element Out becomes the shortest, and the power transmission loss can be further reduced.

[0137] (3) In addition, Figure 4 In the example shown, the first engagement element B1 is configured to be able to select between a one-way clutch state and an engagement state.

[0138] The second engagement element B2 is composed of a multi-plate clutch.

[0139] The third engagement element CL1 is composed of a multi-plate clutch.

[0140] Since the first engagement element B1 is engaged when the first gear is realized, that is, an engagement element that rarely requires control of the engagement capacity, if the first engagement element B1 is formed by a one-way clutch, the structure of the assembly 100 can be simplified while ensuring smooth starting performance.

[0141] Furthermore, by configuring the second and third engagement elements B2 and CL1 whose engagement capacity is required to be controlled during the shifting operation as multi-disc clutches capable of controlling the engagement capacity, the acceleration and deceleration of the output rotation during the shifting operation to the second and third gears can be suppressed to be small.

[0142] Furthermore, by configuring the first engagement element B1 to be selectable not only in the one-way clutch state but also in the engaged state, the first gear can be used as a reverse gear when the motor MTR is reversed to cause the vehicle to travel reversely.

[0143] (4) In addition, Figure 4 In the example shown, the second engaging element B2 has a portion overlapping with the third engaging element CL1 when viewed in the radial direction.

[0144] According to this structure, the axial dimension of the assembly 100 can be reduced.

[0145] (5) In addition, Figure 4 In the illustrated example, the hydraulic actuator 26 that drives the second engagement element B2 has a portion that overlaps with the hydraulic actuator 36 that drives the third engagement element CL1 when viewed in the radial direction.

[0146] According to this structure, the axial dimension of the assembly 100 can be reduced.

[0147] In addition, by having both the structures of (4) and (5), the second engagement element B2, the third engagement element CL1, and the hydraulic actuators 26 and 36 can be arranged in one place, and the first planetary gear mechanism PG1 and the second planetary gear mechanism PG2 can be efficiently laid out. In other words, it is possible to avoid an inefficient layout in which the first planetary gear mechanism PG1 and the second planetary gear mechanism PG2 are arranged close to each other and the components of the engagement elements are arranged between them.

[0148] (6) In addition, Figure 4 In the example shown, the first engagement element B1 has a portion overlapping the second planetary gear mechanism PG2 when viewed in the radial direction.

[0149] According to this structure, the axial dimension of the assembly 100 can be reduced.

[0150] (7) In addition, Figure 4In the example shown, the other side of the second engaging element B2 is fixed to the intermediate wall 2, and the intermediate wall 2 has a portion located between the first engaging element B1 and the second engaging element B2.

[0151] According to this structure, the second engagement element B2 can be easily fixed to the housing 1 while effectively utilizing the free space in the housing 1 .

[0152] As mentioned above, although the embodiment of the present invention has been described, the above embodiment is only an application example of the present invention, and the technical scope of the present invention is not limited to the specific structure of the above embodiment.

[0153] For example, Figure 1 , Figure 5A to Figure 5C The schematic diagram shown is a part of the application example of the present invention, and the schematic diagram of the components to which the present invention is applied is not limited thereto.

[0154] Furthermore, in the above-described embodiment, the assembly 100 is described as being for a hybrid vehicle, but it may also be used for an electric vehicle without an engine ENG.

[0155] Furthermore, although the first planetary gear mechanism PG1 and the second planetary gear mechanism PG2 are each configured as a single pinion planetary gear mechanism, they may be configured as a double pinion planetary gear mechanism.

[0156] Explanation of symbols

[0157] 1: Shell

[0158] 2: Middle wall (wall)

[0159] 26: Hydraulic actuator (actuator)

[0160] 36: Hydraulic actuator (actuator)

[0161] 100: Components

[0162] B1: First engagement element

[0163] B2: Second engagement element

[0164] CL1: Third engagement element

[0165] CL2: Fourth engagement element

[0166] S1: First sun gear (first rotating element)

[0167] C1: First planetary gear carrier (second rotating element)

[0168] R1: First ring gear (third rotating element)

[0169] S2: Second sun gear (fourth rotating element)

[0170] C2: Second planetary gear carrier (fifth rotating element)

[0171] R2: Second ring gear (sixth rotating element)

[0172] In: Input element

[0173] Out: Output element

[0174] PG1: First planetary gear mechanism

[0175] PG2: Second planetary gear mechanism

Claims

1. A component having: Input components; Output components; a first engaging element; a second engaging element; a third engaging element; A first planetary gear mechanism, which has a first rotating element, a second rotating element, and a third rotating element arranged in sequence on a collinear diagram; A second planetary gear mechanism includes a fourth rotating element, a fifth rotating element, and a sixth rotating element arranged in sequence on the collinear diagram, The input element is connected to the first rotating element, The output element is connected with the second rotating element and the sixth rotating element, One side of the first engaging element is connected to the fifth rotating element, The other side of the first engaging element is fixed, One side of the second engaging element is connected to the third rotating element and the fourth rotating element. The other side of the second engaging element is fixed, The third engagement element connects two rotation elements selected from the first to sixth rotation elements that are not connected to each other.

2. The assembly of claim 1, wherein: The third engaging element connects the input element and the output element.

3. The assembly of claim 1, wherein: The first engagement element is configured to be able to select a one-way clutch state and an engagement state. The second engagement element is composed of a multi-plate clutch, The third engagement element is formed by a multi-plate clutch.

4. The assembly of claim 1, wherein: The second engaging element has a portion overlapping with the third engaging element when viewed in the radial direction.

5. The assembly of claim 4, wherein: When viewed in the radial direction, the actuator driving the second engagement element has a portion overlapping with the actuator driving the third engagement element.

6. The assembly of claim 1, wherein: The first engaging element has a portion overlapping with the second planetary gear mechanism when viewed in the radial direction.

7. The assembly of claim 1, wherein: The other side of the second engaging element is fixed to the wall portion, The wall portion has a portion located between the first engaging element and the second engaging element.

Images