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 third 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, the other side of the first clamping element is fixed, and the other side of the second clamping element is connected with the fifth rotating element. One side of the second clamping element is connected with the first rotating element and the fourth rotating element, the other side of the second clamping element is fixed, and the third clamping element connects two rotating elements which are selected from the first to sixth rotating elements and are not connected with each other.

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 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 and 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 has:

[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 third 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 first 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 4A This is a schematic diagram of a modified example of the assembly.

[0036] Figure 4B This is a schematic diagram of a modified example of the assembly.

[0037] Figure 4C This is a schematic diagram of a modified example of the assembly.

[0038] Figure 4D This is a schematic diagram of a modified example of the assembly.

[0039] Figure 4E 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. It 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, it 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 forward three-speed automatic transmission assembly for an electric vehicle that changes the speed of the rotation input to the input element IN from the electric motor (not shown) 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, both the input element IN and the output element OUT are rotating shafts.

[0057] The assembly 100 is a so-called three-in-one assembly that accommodates an input element IN, first and second planetary gear mechanisms PG1 and PG2, first to third engagement elements B1, B2, and CL, an output element OUT, and an unillustrated motor and inverter in a housing 1. The housing 1 is fixed to the vehicle so as not to rotate.

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

[0059] 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 (not shown), a first planetary gear carrier C1 as a second rotating element that supports the plurality of first pinions 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, and the plurality of first pinions mesh with the first ring gear R1.

[0060] The second planetary gear mechanism PG2 is a single pinion planetary gear mechanism, which includes: a second sun gear S2 as a fourth rotation element, a plurality of second pinions (not shown), a second planetary gear carrier C2 as a fifth rotation element that supports the plurality of second pinions 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, and the plurality of second pinions mesh with the second ring gear R2.

[0061] The first sun gear S1 is connected to the second sun gear S2. The first planetary carrier C1 is connected to the output element OUT and the second ring gear R2 via the inner circumference of the first sun gear S1 and the second sun gear S2 through the member M disposed on the inner circumference of the first sun gear S1 and the second sun gear S2. The first ring gear R1 is connected to the input element IN.

[0062] The rotation speed of the output element OUT is the output rotation speed of the assembly 100 .

[0063] The first engagement element B1 is a brake. The first engagement element B1 is 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 engaged state are set as 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.

[0064] 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 as one side and the other side, one side is connected to the first sun gear S1 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 sun gear S1 and the second sun gear S2 can be fixed to the housing 1.

[0065] The third engagement element CL is a clutch. The third engagement element CL is composed of an electric multi-plate clutch.

[0066] The third engagement element CL includes a hub 11 , inner friction plates 12 and outer friction plates 13 arranged alternately with each other, a roller 14 , and an electric actuator 15 .

[0067] The inner friction plate 12 is splined to the outer periphery of the hub 11 and is relatively displaceable in the axial direction but non-rotatable relative to the hub 11. The hub 11 is splined to the outer periphery of the first ring gear R1 and is non-rotatably connected to the first ring gear R1 and the input element IN.

[0068] The outer friction plate 13 is spline-fitted on the inner circumference of the roller 14. The outer friction plate 13 is relatively displaceable but non-rotatable with respect to the roller 14. The roller 14 is connected to the first sun gear S1, the second sun gear S2, and one side of the second engagement element B2.

[0069] The electric actuator 15 is an actuator that drives the third engagement element CL. When the electric motor built into the electric actuator 15 is driven, the piston 15p is pushed out in the axial direction, the inner friction plate 12 and the outer friction plate 13 are pressed so as not to rotate relative to each other, and the third engagement element CL is in an engagement state. The electric actuator 15 mechanically applies a force to the piston 15p and receives a reaction force from the piston 15p, so the electric actuator 15 is fixed to the housing 1.

[0070] Furthermore, when the electric motor built in the electric actuator 15 is driven in the reverse direction, the piston 15p moves backward, the inner friction plates 12 and the outer friction plates 13 are separated, and the third engagement element CL is brought into a released state.

[0071] In addition, a hydraulic actuator that pushes out the piston 15p by oil pressure may be used instead of the electric actuator 15. The oil supply to the hydraulic actuator may be performed by a hydraulic supply assembly mounted on the housing 1 or the like, or by a control valve assembly composed of a valve column, a solenoid valve, etc.

[0072] When the two parts of the third engaging element CL that are engaged when the third engaging element CL is in the engaged state are respectively set to one side (hub 11) and the other side (drum 14), one side is connected to the input element IN and the first ring gear R1, and the other side is connected to the first sun gear S1, the second sun gear S2, and one side of the second engaging element B2. Thus, when the third engaging element CL is engaged, the input element IN and the first ring gear R1 are connected to the first sun gear S1, the second sun gear S2, and one side of the second engaging element B2.

[0073] Since the other side of the third engagement element CL is connected to one side of the second engagement element B2, they can be made into a common component (integrated component). Therefore, the number of components of the assembly 100 can be reduced.

[0074] In addition, by connecting the first sun gear S1 and the first ring gear R1 using the third engaging element CL, it is not necessary to arrange the third engaging element CL between the first planetary gear mechanism PG1 and the second planetary gear mechanism PG2, and the first engaging element B1, the second engaging element B2 and the third engaging element CL can be concentrated in one place. As a result, the radial outer space of the first planetary gear mechanism PG1 and the second planetary gear mechanism PG2 can be effectively utilized to arrange the first engaging element B1, the second engaging element B2 and the third engaging element CL close to each other. Furthermore, in Figure 1 In the illustrated arrangement, the third engagement element CL is overlapped with the first planetary gear mechanism PG1 when viewed in the radial direction, whereby the axial dimension of the assembly 100 can be reduced.

[0075] In addition, the actuators that can be used for the third engagement element CL include: an actuator that is easily restricted by layout (an electric actuator that needs to be fixed to the housing 1 or the like due to the reaction force, a hydraulic actuator that needs to install a hydraulic pressure supply assembly on the housing 1 or the like, etc.), and an actuator that is not easily restricted by layout (a hydraulic actuator that supplies hydraulic pressure from a control valve assembly, etc.). When the former actuator is used, if the third engagement element CL needs to be arranged between the first planetary gear mechanism PG1 and the second planetary gear mechanism PG2, the difficulty of layout design increases.

[0076] Regarding this, if Figure 1 The configuration shown in FIG. 1 can arrange the third engagement element CL radially outside the first planetary gear mechanism PG1 and the second planetary gear mechanism PG2, and can also easily fix the third engagement element CL to the housing 1, so that the layout design is easy regardless of the type of actuator. Figure 1 The above-described arrangement can improve the degree of freedom in selecting the actuator that drives the third engagement element CL.

[0077] In addition, by connecting the first planetary gear carrier C1 to the second ring gear R2 via the inner circumferential side of the first sun gear S1 and the second sun gear S2, the connection between the first planetary gear carrier C1 and the second ring gear R2 becomes easier than when connected via the radial outer sides of the first planetary gear mechanism PG1 and the second planetary gear mechanism PG2, and the layout design becomes easier.

[0078] Figure 2 : is an engagement table showing the relationship between the engagement states of the first to third engagement elements B1, B2, CL 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.

[0079] 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 CL. The second gear is achieved by engaging the second engagement element B2 and releasing the first and third engagement elements B1 and CL. The third gear is achieved by engaging the third engagement element CL and releasing the first and second engagement elements B1 and B2.

[0080] 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 left side of the figure.

[0081] Since the first sun gear S1 and the second sun gear S2 are connected to each other, they correspond to the same vertical line l1. Similarly, since the first planetary gear carrier C1 and the second ring gear R2 are also connected to each other, they correspond to the same vertical line l3. When the interval between the vertical line l1 and the vertical line l3 is set to 1, the interval α1 between the vertical line l3 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. In addition, when the interval between the vertical line l1 and the vertical line l2 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.

[0082] 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.

[0083] In the first gear, the second carrier C2 is fixed to the housing 1 by engaging the first engagement element B1, and the rotation speed of the second carrier C2 becomes zero. Therefore, the straight line L1 corresponding to the first gear is a straight line passing through the point X1.

[0084] When the rotational speed of the first ring gear R1 is set to r4 and the rotational speeds of the first planetary gear carrier C1 and the second ring gear R2 are set to r1, the input rotational speed rin of the component 100 is equal to the rotational speed r4 of the first ring gear R1, and the output rotational speed rout is equal to the rotational speed r1 of the first planetary gear carrier C1 and the second ring gear R2, so the speed ratio in the first gear becomes rin / rout=r4 / r1.

[0085] In the 2nd gear, the first sun gear S1 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 sun gear S1 and the second sun gear S2 become zero. Therefore, the straight line L2 corresponding to the 2nd gear is a straight line passing through the point X2.

[0086] When the rotation speed of the first ring gear R1 is set to r4, and the rotation speeds of the first planetary gear carrier C1 and the second ring gear R2 are set to r2, the input rotation speed rin of the assembly 100 is equal to the rotation speed r4 of the first ring gear R1, and the output rotation speed rout is equal to the rotation speed r2 of the first planetary gear carrier C1 and the second ring gear R2, so the speed ratio in the second gear becomes rin / rout=r4 / r2. Since r2 is larger than r1, the speed ratio of the second gear becomes smaller than the speed ratio of the first gear.

[0087] In the 3rd gear, the first ring gear R1 is connected to the first sun gear S1 and the second sun gear S2 by engaging the third engagement element CL, so that the rotation speeds of the respective 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 3rd gear speed ratio is 1, which is smaller than the 2nd gear.

[0088] 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.

[0089] In the third gear, the speed ratio is 1. That is, since all the rotating elements constituting the first and second planetary gear mechanisms PG1 and PG2 rotate at the same rotation speed, it is possible to reduce power transmission loss caused by the rotation speed difference between the rotating elements.

[0090] Next, a modification of the assembly 100 will be described.

[0091] Figure 4A to Figure 4E is a schematic diagram of a modified example of the assembly 100. The position of the third engaging element CL 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.

[0092] Since the third engagement element CL only needs to be able to achieve the speed ratio 1 by engagement, the position of the third engagement element CL may be Figure 1 Locations other than those shown.

[0093] Specifically, in order to Figure 3In 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.

[0094] In other words, from all combinations of selecting two rotating elements 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 combination (the first sun gear S1 and the second sun gear S2, the first planetary gear carrier C1 and the second ring gear R2), and connect the two rotating elements.

[0095] exist Figure 4A In the illustrated modification, the third engaging element CL is arranged at a position capable of connecting the output element OUT, the first planetary gear carrier C1, and the second ring gear R2 to the first sun gear S1 and the second sun gear S2. Specifically, one side (hub 11) of the third engaging element CL is connected to the first sun gear S1, the second sun gear S2, and one side of the second engaging element B2, and the other side (drum 14) is connected to the output element OUT, the first planetary gear carrier C1, and the second ring gear R2.

[0096] In this arrangement, since the third engagement element CL is arranged radially inside the member connecting the first planetary gear carrier C1 and the output element OUT, the hydraulic actuator 16 that supplies hydraulic pressure from the control valve assembly with few layout restrictions is preferably used as an actuator for driving the third engagement element CL.

[0097] In addition, by connecting the first planetary gear carrier C1 to the second ring gear R2 via the inner circumferential side of the first sun gear S1 and the second sun gear S2, the connection between the first planetary gear carrier C1 and the second ring gear R2 becomes easier than when connected via the radial outer sides of the first planetary gear mechanism PG1 and the second planetary gear mechanism PG2, and the layout design becomes easier.

[0098] The third engagement element CL is arranged coaxially with the first and second planetary gear mechanisms PG1 and PG2 and has a portion overlapping with the first planetary gear mechanism PG1 and a portion overlapping with the second planetary gear mechanism PG2 when viewed in the axial direction.

[0099] In addition, since one side (hub 11) of the third engagement element CL is connected to one side of the second engagement element B2, they can be made into a common component (integrated component). Therefore, the number of components of the assembly 100 can be reduced.

[0100] exist Figure 4BIn the modified example shown, the third engaging element CL is arranged at a position capable of connecting the input element IN and the first ring gear R1 to the first planetary gear carrier C1, the second ring gear R2 and the output element OUT. Specifically, one side (hub 11) of the third engaging element CL is connected to the first planetary gear carrier C1, the second ring gear R2 and the output element OUT, and the other side (drum 14) is connected to the input element IN and the first ring gear R1.

[0101] In this configuration, since the third engaging element CL is arranged between the component connecting the input element IN and the first ring gear R1 and the component connecting the first planetary gear carrier C1 and the output element OUT, it is preferred to use a hydraulic actuator 16 that supplies oil pressure from a control valve assembly with fewer layout constraints as an actuator for driving the third engaging element CL.

[0102] In addition, by connecting the first planetary gear carrier C1 to the second ring gear R2 via the inner circumferential side of the first sun gear S1 and the second sun gear S2, the connection between the first planetary gear carrier C1 and the second ring gear R2 becomes easier than when connected via the radial outer sides of the first planetary gear mechanism PG1 and the second planetary gear mechanism PG2, and the layout design becomes easier.

[0103] The third engagement element CL is arranged coaxially with the first and second planetary gear mechanisms PG1 and PG2 and has a portion overlapping with the first planetary gear mechanism PG1 and a portion overlapping with the second planetary gear mechanism PG2 when viewed in the axial direction.

[0104] Furthermore, when the third engagement element CL is engaged, the input element IN and the output element OUT can be connected in addition to achieving the speed ratio 1. Therefore, 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.

[0105] exist Figure 4C In the modified example shown, the third engaging element CL is arranged at a position capable of connecting the second planetary gear carrier C2 with the second ring gear R2, the first planetary gear carrier C1 and the output element OUT. Specifically, one side (hub 11) of the third engaging element CL is connected to the second planetary gear carrier C2 and one side of the first engaging element B1, and the other side (roller 14) is connected to the second ring gear R2, the first planetary gear carrier C1, and the output element OUT.

[0106] In this configuration, since the third engagement element CL is arranged radially inside the member connecting the second ring gear R2 and the output element OUT, it is preferable to use a hydraulic actuator 16 that supplies hydraulic pressure from a control valve assembly with few layout constraints as an actuator for driving the third engagement element CL.

[0107] In addition, by connecting the first planetary gear carrier C1 to the second ring gear R2 via the inner circumferential side of the first sun gear S1 and the second sun gear S2, the connection between the first planetary gear carrier C1 and the second ring gear R2 becomes easier than when connected via the radial outer sides of the first planetary gear mechanism PG1 and the second planetary gear mechanism PG2, and the layout design becomes easier.

[0108] The third engagement element CL is arranged coaxially with the first and second planetary gear mechanisms PG1 and PG2 and has a portion overlapping with the first planetary gear mechanism PG1 and a portion overlapping with the second planetary gear mechanism PG2 when viewed in the axial direction.

[0109] Furthermore, since one side (hub 11) of the third engagement element CL is connected to one side of the first engagement element B1, they can be made into a common component (integrated component). Thus, the number of components of the assembly 100 can be reduced.

[0110] exist Figure 4D In the modified example shown, the third engaging element CL is arranged at a position capable of connecting the first sun gear S1 and the second sun gear S2 to the second ring gear R2, the first planetary gear carrier C1 and the output element OUT. Specifically, one side (hub 11) of the third engaging element CL is connected to the first sun gear S1, the second sun gear S2 and one side of the second engaging element B2, and the other side (drum 14) is connected to the second ring gear R2, the first planetary gear carrier C1 and the output element OUT.

[0111] In this configuration, since the third engagement element CL is arranged radially inside the member connecting the second ring gear R2 and the output element OUT, it is preferable to use a hydraulic actuator 16 that supplies hydraulic pressure from a control valve assembly with few layout constraints as an actuator for driving the third engagement element CL.

[0112] In addition, by connecting the first planetary gear carrier C1 to the second ring gear R2 via the inner circumferential side of the first sun gear S1 and the second sun gear S2, the connection between the first planetary gear carrier C1 and the second ring gear R2 becomes easier than when connected via the radial outer sides of the first planetary gear mechanism PG1 and the second planetary gear mechanism PG2, and the layout design becomes easier.

[0113] The third engagement element CL is arranged coaxially with the first and second planetary gear mechanisms PG1 and PG2 and has a portion overlapping with the first planetary gear mechanism PG1 and a portion overlapping with the second planetary gear mechanism PG2 when viewed in the axial direction.

[0114] In addition, since one side (hub 11) of the third engagement element CL is connected to 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.

[0115] exist Figure 4E In the modified example shown, the third engaging element CL is arranged at a position that enables the first sun gear S1 and the second sun gear S2 to be connected to the second planetary gear carrier C2. Specifically, one side (hub 11) of the third engaging element CL is connected to the first sun gear S1, the second sun gear S2 and one side of the second engaging element B2, and the other side (roller 14) is connected to the second planetary gear carrier C2 and one side of the first engaging element B1.

[0116] In this configuration, since the third engagement element CL is arranged radially inside the member connecting the second ring gear R2 and the output element OUT, it is preferable to use a hydraulic actuator 16 that supplies hydraulic pressure from a control valve assembly with few layout constraints as an actuator for driving the third engagement element CL.

[0117] In addition, by connecting the first planetary gear carrier C1 to the second ring gear R2 via the inner circumferential side of the first sun gear S1 and the second sun gear S2, the connection between the first planetary gear carrier C1 and the second ring gear R2 becomes easier than when connected via the radial outer sides of the first planetary gear mechanism PG1 and the second planetary gear mechanism PG2, and the layout design becomes easier.

[0118] The third engagement element CL is arranged coaxially with the first and second planetary gear mechanisms PG1 and PG2 and has a portion overlapping with the first planetary gear mechanism PG1 and a portion overlapping with the second planetary gear mechanism PG2 when viewed in the axial direction.

[0119] In addition, since one side (hub 11) of the third engaging element CL is connected to one side of the second engaging element B2, and the other side (roller 14) is connected to one side of the first engaging element B1, they can be used as a common component (integral component).

[0120] Figure 4A to Figure 4E 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.

[0121] Next, the effects of the embodiment of the present invention will be described.

[0122] (1) The assembly 100 according to the embodiment of the present invention comprises:

[0123] Input element IN;

[0124] Output element OUT;

[0125] A first engaging element B1;

[0126] A second engaging element B2;

[0127] A third engaging element CL;

[0128] 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;

[0129] 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.

[0130] The input element IN is connected to the first ring gear R1.

[0131] The output element OUT is connected to the first planetary gear carrier C1 and the second ring gear R2.

[0132] One side of the first engagement element B1 is connected to the second planetary gear carrier C2.

[0133] The other side of the first engaging element B1 is fixed.

[0134] One side of the second engaging member B2 is connected to the first sun gear S1 and the second sun gear S2.

[0135] The other side of the second engaging element B2 is fixed.

[0136] The third engaging element CL connects two rotating elements selected from the first sun gear S1 , the first carrier C1 , the first ring gear R1 , the second sun gear S2 , the second carrier C2 , and the second ring gear R2 , which are not connected to each other.

[0137] According to this structure, by changing the engagement state of the first to third engagement elements B1, B2, CL, 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.

[0138] When the first and second engagement elements B1 and B2 are released and the third engagement element CL 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 the power transmission loss caused by the speed difference between the rotating elements.

[0139] (2) In addition, Figure 1 In the example shown, the first planetary gear mechanism PG1 and the second planetary gear mechanism PG2 are single pinion planetary gear mechanisms, and the third engaging element CL connects the first sun gear S1 and the first ring gear R1 .

[0140] According to this structure, it is not necessary to arrange the third engagement element CL between the first planetary gear mechanism PG1 and the second planetary gear mechanism PG2, and the first engagement element B1, the second engagement element B2, and the third engagement element CL can be gathered in one place. Thus, the space outside the radial direction of the first planetary gear mechanism PG1 and the second planetary gear mechanism PG2 can be effectively utilized to arrange the first engagement element B1, the second engagement element B2, and the third engagement element CL close to each other.

[0141] In addition, the third engagement element CL can be arranged radially outside the first planetary gear mechanism PG1 and the second planetary gear mechanism PG2, and the third engagement element CL can be easily fixed to the housing 1, so that the layout design is easy regardless of the type of actuator. Therefore, according to this structure, the freedom of selection of the actuator that drives the third engagement element CL can be increased.

[0142] (3) In addition, Figure 1 , Figure 4A , Figure 4C to Figure 4E In the example shown, one side of the third engaging element CL (the hub 11 or the drum 14) is connected to one side of the first engaging element B1 or one side of the second engaging element B2.

[0143] According to this configuration, one side of the third engagement element CL and one side of the first engagement element B1 or one side of the second engagement element B2 can be made into a common component (integral component), thereby reducing the number of components of the assembly 100 .

[0144] (4) In addition, Figure 1 , Figure 4A to Figure 4E In the example shown, the first planetary gear carrier C1 is connected to the second ring gear R2 via the inner circumferences of the first sun gear S1 and the second sun gear S2.

[0145] According to this configuration, the first carrier C1 and the second ring gear R2 can be easily connected to each other, and the layout design can be easily performed, compared with the case where the first planetary gear mechanism PG1 and the second planetary gear mechanism PG2 are connected via the radially outer sides.

[0146] 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.

[0147] For example, Figure 1 , Figure 4A to Figure 4EThe 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.

[0148] 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.

[0149] Explanation of symbols

[0150] 1: Shell

[0151] 100: Components

[0152] B1: First engagement element

[0153] B2: Second engagement element

[0154] CL: Third engagement element

[0155] S1: First sun gear (first rotating element)

[0156] C1: First planetary gear carrier (second rotating element)

[0157] R1: First ring gear (third rotating element)

[0158] S2: Second sun gear (fourth rotating element)

[0159] C2: Second planetary gear carrier (fifth rotating element)

[0160] R2: Second ring gear (sixth rotating element)

[0161] IN: Input element

[0162] OUT: Output element

[0163] PG1: First planetary gear mechanism

[0164] 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 third 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 first 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 first planetary gear mechanism and the second planetary gear mechanism are single pinion planetary gear mechanisms, The third engaging element connects the first rotating element and the third rotating element.

3. The assembly of claim 1, wherein: One side of the third engaging element is connected to one side of the first engaging element or one side of the second engaging element.

4. The assembly according to any one of claims 1 to 3, wherein: The second rotation element is connected to the sixth rotation element via inner circumferential sides of the first rotation element and the second rotation element.

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