Dual clutch fixing member, dual clutch, and assembly method of transmission

Abstract

A fixing member for a dual clutch includes a body portion (31) which is extended in a plate shape in a manner matching a portion of an outer circumferential contour of both a clutch assembly (1) and a centering type driven cylinder (2) of the dual clutch, and a plurality of fixing columns (32) for matching with holes (11h) formed in an outer hub (11) of the clutch assembly (1) and fixed to the body portion (31) in a manner protruding from the body portion (31) toward one side, so that an axial dimension of the dual clutch is substantially maintained. In addition, a dual clutch including the fixing member and an assembling method of a transmission including the dual clutch are provided, so that a problem of transmission assembling failure due to a change in the axial dimension of the dual clutch is avoided.

Description

Technical Field

[0001] This invention relates to the field of vehicle clutches, and more particularly to a fastener for a dual-clutch transmission, a dual-clutch transmission including the fastener, and a method for assembling the dual-clutch transmission. Background Technology

[0002] like Figures 1a to 1c As shown, a dual-clutch transmission includes two clutch assemblies 1 and a centering driven cylinder 2. Specifically, each clutch assembly 1 includes an inner hub 12 for fixed mounting to a shaft (e.g., an input shaft) of the transmission, an outer hub 11 located radially outside the inner hub 12, and a clutch unit 13 located between the inner hub 12 and the outer hub 11. The clutch unit 13 includes friction discs and pressure plates alternately arranged axially on the clutch assembly 1, one of which is fixedly mounted to the inner hub 12, and the other is fixedly mounted to the outer hub 11. The centering driven cylinder 2 includes a housing 21 and a piston 22, a bearing 23, and a preload spring 24 mounted on corresponding portions of the housing 21. The assembly state of the dual-clutch transmission is as follows. Figure 1b and Figure 1c As shown, in the assembled state, the driven cylinder 2 is installed between the two clutch assemblies 1, and the preload spring 24 applies a preload spring force to the two clutch assemblies 1 located on both sides.

[0003] Furthermore, in the assembly process of a transmission including the dual-clutch as described above,

[0004] First, the transmission mechanism, including the dual clutch and other gears, needs to be mounted on the shaft of the transmission, and then the shaft is installed in the main body of the transmission housing.

[0005] Then, based on the measured axial dimensions of the transmission mechanism along the shaft and the axial dimensions inside the transmission housing body, appropriate shims are selected and fitted between the transmission mechanism and the transmission housing body.

[0006] Finally, assemble the cover onto the main body of the casing to complete the entire assembly process.

[0007] However, when measuring the axial dimension during the assembly process described above, since the clutch assembly 1 of the dual clutch and the centering driven cylinder 2 are not relatively fixed in the axial direction and the preload spring force generated by the preload spring 24 of the centering driven cylinder 2 on the clutch assemblies 1 on both sides is uncertain, the measurement result of the axial dimension of the transmission mechanism may not be accurate enough, thus making it impossible to select an appropriate shim, which ultimately leads to a failure in the assembly of the transmission. Summary of the Invention

[0008] The present invention is made in view of the deficiencies of the prior art described above. An object of the present invention is to provide a fastener for a dual-clutch transmission and a dual-clutch including the fastener, wherein the fastener enables the components of the dual-clutch to be relatively fixed at least axially. Another object of the present invention is to provide an assembly method for a transmission including the above-described dual-clutch, which avoids the problem of transmission assembly failures caused by the components of the dual-clutch not being relatively fixed.

[0009] To achieve the above-mentioned objectives, the present invention adopts the following technical solution.

[0010] This invention provides a fastener for a dual-clutch transmission, the fastener comprising:

[0011] The body portion, which is formed in a plate shape to match a portion of the outer circumferential contour of both the clutch assembly and the centering driven cylinder of the dual clutch; and

[0012] Multiple fixed parts, which are used to connect to the clutch assembly.

[0013] Preferably, the body portion is in the shape of an arc-shaped plate.

[0014] More preferably, the fastener further includes a retaining portion formed on the body portion for retaining the fastener during installation / removal.

[0015] More preferably, the retaining portion includes at least one component formed on the body portion, the component being at least one of a hole, a post, a hook, and a ring.

[0016] More preferably, the plurality of fixing parts are formed as a plurality of fixing posts, the plurality of fixing posts protruding from the body portion toward one side, the plurality of fixing posts being located at both ends of the body portion, and at each end of the body portion, the plurality of fixing posts are arranged sequentially in approximately one direction.

[0017] More preferably, the fixing post is connected to the hole of the outer hub in a mating manner, wherein the diameter of the fixing post is smaller than the diameter of the hole of the outer hub.

[0018] The present invention also provides a dual clutch comprising:

[0019] Two clutch assemblies, each clutch assembly including an outer hub, an inner hub, and a clutch unit located between the outer hub and the inner hub;

[0020] A center-driven cylinder, which is axially mounted between the two clutch assemblies of the dual clutch and is used to control the engagement or disengagement of the clutch unit; and

[0021] The fixing member for the dual clutch described in any one of the above technical solutions is detachably mounted on the two clutch assemblies, thereby enabling the two clutch units and the centering driven cylinder to be fixed relative to each other at least in the axial direction of the dual clutch.

[0022] Preferably, the outer periphery of the outer hub is formed with a lubricating oil hole for lubricating oil to enter or exit the clutch assembly, the lubricating oil hole serving as a hole that mates with the fixed portion of the fixing member.

[0023] More preferably, the plurality of fasteners can be installed on the two clutch assemblies in a manner that is evenly distributed in the circumferential direction of the dual clutch.

[0024] More preferably, the holes among the plurality of lubricating oil holes that mate with the fixing post of the fixing member are marked or have a different arrangement and / or cross-sectional shape than the other lubricating oil holes.

[0025] More preferably, the outer periphery of the outer hub is formed with multiple sets of holes specifically for the fixing post of the fixing member to mate with.

[0026] The present invention also provides a method for assembling a dual-clutch transmission comprising any one of the above technical solutions, the assembly method comprising:

[0027] First, the two clutch assemblies and the centering driven cylinder are assembled together by connecting the two clutch assemblies with a dual clutch fastener, such that the two clutch assemblies and the centering driven cylinder located between the two clutch assemblies are fixed relative to each other at least in the axial direction of the shaft, forming a pre-assembled dual clutch assembly.

[0028] Next, the transmission mechanism, including the pre-assembled dual-clutch assembly, is installed into the housing body of the transmission. The axial dimension of the transmission mechanism and the axial spatial dimension of the housing body are measured. Based on the measurement results, a gasket is installed between the housing body of the transmission and the transmission mechanism. Then, the fastener for the dual clutch is removed.

[0029] The present invention also provides a method for assembling a dual-clutch transmission comprising any one of the above technical solutions, the assembly method comprising:

[0030] First, the transmission mechanism including the dual clutch is mounted on the shaft, such that the two clutch assemblies are arranged side by side in the axial direction of the shaft in such a way that they clamp the centering driven cylinder.

[0031] Secondly, the shaft with the transmission mechanism is installed in the housing body of the transmission, and the dual clutch is connected to the clutch assembly by a fixing member, so that the two clutch assemblies and the centering driven cylinder located between the two clutch assemblies are relatively fixed.

[0032] Furthermore, the axial dimensions of the transmission mechanism and the axial spatial dimensions of the housing body are measured. Based on the measurement results, a shim is installed between the housing body of the transmission and the transmission mechanism, and then the fastener for the dual clutch is removed.

[0033] By adopting the above-described technical solution, the present invention provides a fixing member for a dual-clutch and a dual-clutch including the fixing member. The dual-clutch includes two clutch assemblies, a centering driven cylinder located between the two clutch assemblies, and a fixing member detachably mounted to the two clutch assemblies. The fixing member, through its fixing post engaging with a hole in the outer hub of the clutch assembly, achieves relative fixation between the two clutch assemblies and the centering driven cylinder, thereby keeping the axial dimension of the entire dual-clutch substantially constant. It can be understood that multiple fixing members can also achieve circumferential fixation between the clutch assemblies and the centering driven cylinder of the dual-clutch.

[0034] Thus, in the assembly method of the transmission including the above-described dual-clutch, the problem of transmission assembly failure caused by changes in the axial dimensions of the dual clutch, as described in the prior art, is avoided. Furthermore, the fastener according to the invention is removed during the transmission assembly method; that is, the fastener according to the invention is removed after the transmission is assembled, thereby allowing the fastener to be repeatedly applied to the same type of dual clutch, thus saving costs. Attached Figure Description

[0035] Figure 1a This shows a schematic diagram of the disassembled structure of a dual clutch; Figure 1b It shows Figure 1a A schematic diagram of the assembly state of the dual clutch; Figure 1c It shows Figure 1a A partial cross-sectional view of the dual clutch in its assembled state.

[0036] Figure 2a This is a three-dimensional structural schematic diagram of a fixing member for a dual clutch according to an embodiment of the present invention; Figure 2b It shows including Figure 2a A schematic diagram of the assembly state of a dual clutch using a fixing component.

[0037] Explanation of reference numerals in the attached figures

[0038] 1. Clutch assembly 11. Outer hub 11. H-hole 12. Inner hub 13. Clutch unit

[0039] 2 pairs of driven cylinders: 21 housing, 22 piston, 23 bearing, 24 preloaded spring

[0040] 3. Fixing component 31. Body part 32. Fixing post 33. Holding part. Detailed Implementation

[0041] Exemplary embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are for teaching those skilled in the art how to implement the present invention, and are not intended to exhaustively describe all possible ways of the invention, nor to limit the scope of the invention.

[0042] In this invention, unless otherwise stated, axial, radial, and circumferential refer to the axial, radial, and circumferential directions of the dual clutch according to the invention, respectively. The structure of a fastener for a dual clutch according to an embodiment of the invention is described below with reference to the accompanying drawings.

[0043] (Structure of a fixing member for a dual clutch according to an embodiment of the present invention)

[0044] like Figure 2a and Figure 2b As shown, the fastener 3 for a dual clutch according to the present invention includes a body portion 31, a plurality of (six in this embodiment) fixing posts 32 and a plurality of (two in this embodiment) retaining portions 33. The fastener 3 is used at least to achieve that the components of the dual clutch mentioned in the background art are substantially fixed relative to each other in the axial direction.

[0045] Specifically, in this embodiment, the main body 31 is integrally formed into an arcuate plate shape extending along a first direction and a second direction that intersect each other. In such a way... Figure 2b When the fixing member 3 is installed on the two clutch assemblies 1 of the dual clutch, the first direction is aligned with the axial direction of the dual clutch, and the second direction is aligned with the circumferential direction of the dual clutch. Thus, the body portion 31 extends into an arc-shaped plate to match a portion of the outer circumferential contour of both the two clutch assemblies 1 and the centering driven cylinder 2 of the dual clutch. This allows the fixing member 3 to fit snugly against the outer contours of both clutch assemblies 1 and the centering driven cylinder 2 when the fixing member 3 is installed on the two clutch assemblies 1 of the dual clutch, thereby improving the fixing effect of the fixing member 3.

[0046] In this embodiment, all six fixing posts 32 are formed in a cylindrical shape to match the holes 11h of the outer hub 11 of the clutch assembly 1, thereby allowing the fixing member 3 to be installed on the clutch assembly 1 through the engagement of the fixing posts 32 with the holes 11h. The six fixing posts 32 are fixed to the body portion 31 in such a way that they protrude from one surface of the body portion 31 toward the same side. In the first direction, the six fixing posts 32 are located at both ends of the body portion 31 and on both sides of the two retaining portions 33, and three fixing posts 32 are respectively provided at each end of the body portion 31, arranged approximately along the second direction. In addition, in order to facilitate the insertion of the fixing posts 32 into the corresponding holes 11h of the outer hub 11 of the clutch assembly 1, the diameter of the fixing posts 32 can be slightly smaller than the diameter of the holes 11h.

[0047] In this embodiment, a retaining portion 33 is formed in the body portion 31, and the retaining portion 33 is used to retain the fastener 3 during installation / removal. The retaining portion 33 includes two through holes formed in the body portion 31 at approximately the center in a first direction and arranged along a second direction. The size and shape of the through holes can be determined according to the size and shape of the tool used to retain the fastener 3.

[0048] The following description includes the structure of the dual clutch with fastener 3.

[0049] (The structure of the dual clutch according to the present invention)

[0050] like Figure 2b As shown, the dual clutch according to the present invention includes two clutch assemblies 1, a centering driven cylinder 2, and three dual clutch fixing members 3.

[0051] and Figures 1a to 1c The clutch assembly 1 shown is similar in structure. According to the present invention, the dual-clutch clutch assembly 1 includes an outer hub 11, an inner hub 12, and a clutch unit 13 located between the outer hub 11 and the inner hub 12. The clutch unit 13 includes friction discs and pressure plates disposed alternately on the outer hub 11 and the inner hub 12. The outer periphery of the outer hub 11 has a plurality of lubricating oil holes for lubricating oil to enter / exit the clutch unit 13 of the clutch assembly 1. The plurality of lubricating oil holes are arranged substantially circumferentially along the dual-clutch. In this embodiment, some of the lubricating oil holes serve as holes 11h that mate with the fixing post 32 of the fixing member 3.

[0052] and Figures 1a to 1c The structure of the centering driven cylinder 2 shown is similar. According to the invention, the centering driven cylinder 2 of the dual clutch is located axially between the two clutch assemblies 1 and is used to control the engagement / disengagement of the clutch unit 13 of the two clutch assemblies 1. Its structure will not be described in detail here.

[0053] Three fasteners 3 are evenly distributed in the circumferential direction of the dual clutch. The fixing post 32 of each dual clutch fastener 3 is inserted into the hole 11h of the outer hub 11 of the two clutch assemblies 1 respectively, and the body part 31 of each dual clutch fastener 3 is in close contact with the outer contour of the corresponding part of the dual clutch. This allows the three dual clutch fasteners 3 to be detachably installed on the two clutch assemblies 1 of the dual clutch, thereby enabling the two clutch assemblies 1 of the dual clutch and the centering driven cylinder 2 located between the two clutch assemblies 1 to be fixed relative to each other at least in the axial direction of the dual clutch.

[0054] The following description includes the assembly method of this dual-clutch transmission.

[0055] (Assembly method of the transmission according to the present invention)

[0056] The present invention also provides a method for assembling a transmission including the above-described dual clutch, the method comprising the following steps.

[0057] First, two clutch assemblies and a centering driven cylinder are assembled together using a dual-clutch fixing component, such that the two clutch assemblies and the centering driven cylinder located between the two clutch assemblies are fixed relative to each other at least in the axial direction of the shaft, forming a pre-assembled dual-clutch assembly.

[0058] Next, the transmission mechanism, including the pre-assembled dual-clutch assembly, is installed into the housing body of the transmission. The axial dimension of the transmission mechanism and the axial spatial dimension of the housing body are measured. Based on the measurement results, a gasket is installed between the housing body of the transmission and the transmission mechanism. Then, the fastener for the dual clutch is removed.

[0059] Alternatively, the assembly method may also include the following steps:

[0060] First, the transmission mechanism, including the dual clutch, is mounted on the shaft of the transmission (not shown in the figure), such that the two clutch assemblies 1 are arranged side by side axially on the shaft in such a way that they sandwich the center-type driven cylinder 2 (e.g., Figure 2b (As shown).

[0061] Next, the shaft housing the transmission mechanism is mounted on the main body of the transmission housing (not shown in the figure). The entire dual clutch is pressurized, and the fixing post 32 of the dual clutch fixing member 3 is inserted into the hole 11h of the outer hub 11 of the clutch assembly 1, using the preload spring 24 in the centering driven cylinder 1 (e.g., ...) Figure 1c As shown, this locks the two clutch assemblies 1 and the centering driven cylinder 2 together at least axially (i.e., relatively fixed) in the dual clutch. Alternatively, other tooling can be used instead of the transmission shaft to lock the two clutch assemblies 1 and the centering driven cylinder 2 using the dual clutch retainer 3.

[0062] Furthermore, measure the axial dimensions of the transmission mechanism and the axial spatial dimensions of the transmission housing body. Based on this, select appropriate gaskets and assemble them between the transmission housing body and the transmission mechanism. Then, remove all dual-clutch fasteners 3.

[0063] In this way, by using the above assembly method, the problem of transmission assembly failure that may be caused by changes in the axial dimensions of the dual clutch, as described in the background art, can be avoided.

[0064] It should be understood that the above embodiments are merely exemplary and not intended to limit the present invention. Those skilled in the art can make various modifications and changes to the above embodiments under the guidance of the present invention without departing from the scope of the invention. Furthermore, the following supplementary descriptions are provided.

[0065] (i) It should be understood that in the assembly method of the transmission, the fastener 3 for the dual clutch according to the invention is eventually removed, so the removed fastener 3 can be reused in the assembly of transmissions including dual clutches of the same type.

[0066] (ii) Although not explicitly stated in the above specific embodiments, it should be understood that the fastener 3 for the dual clutch according to the present invention can be directly applied to Figures 1a to 1c The dual clutch shown in the figure does not require any changes to the structure of the dual clutch, thus saving development time.

[0067] (iii) Although the specific embodiments described above show that the retaining part 33 includes two holes formed in the body part 31 and the fixing post 32 consists of six cylinders fixed to the body part 31, the present invention is not limited thereto. The retaining part 33 can be formed into other structures depending on the retaining tool used, and the number of retaining parts 33 can be set arbitrarily as needed. For example, in one example, the retaining part 33 can be manifested as a protruding post or tab protruding radially outward (i.e., in the direction opposite to the protrusion direction of the fixing post 32). In another example, the retaining part 33 can be manifested as a hook or ring protruding radially outward (i.e., in the direction opposite to the protrusion direction of the fixing post 32). Of course, the retaining part 33 can also be a combination of various structures, such as a combination of at least two of the holes, protruding posts, tabs, rings, and hooks described above.

[0068] The fixed post 32 can also be replaced with a desired shape that matches other structures of the dual clutch, such as a claw or "L" shape, which engages with one side of the clutch assembly 1 and can clamp one side of the two clutch assemblies 1 by the claw or "L" shape on both sides under the action of the preloaded spring 24, thereby holding the two clutch assemblies 1 and the centering driven cylinder 2 located between the two clutch assemblies 1 together at a predetermined axial distance.

[0069] When the holes 11h on the outer periphery of the outer hub 11 of the clutch assembly 1 are located at the same axial position on the outer hub 11 (i.e., the axial positions of multiple holes 11h are the same), it is not necessary to specifically select the hole 11h into which the fixing post 32 of the fixing member 3 is inserted to ensure that the distance between the two clutch assemblies 1 is the design distance, that is, the preload spring 24 is compressed as required by design. When the holes 11h on the outer periphery of the outer hub 11 of the clutch assembly 1 are arranged in an S-shape, or when multiple holes 11h are arranged in other regular patterns, corresponding indicator marks can be given in the predetermined holes 11h or areas of the outer hub 11 to guide the fixing post 32 of the fixing member 3 to be inserted into the predetermined holes 11h, ensuring that the distance between the two clutch assemblies 1 is the design distance, that is, the preload spring 24 is compressed as required by design.

[0070] Additionally, holes can be provided on the outer hub 11 of the clutch assembly 1 specifically for inserting the retaining post 32 of the retaining member 3. These holes can be specially marked, or they can have a different arrangement or cross-sectional shape than other holes, such as those for lubricating oil inlet and outlet. The holes for mating with the retaining post 32 of the retaining member 3 can be formed not only as through holes but also as blind holes.

[0071] (iv) Marks may be designed on the fixing member 3 to indicate its installation direction, so that one end of the fixing member 3 and the corresponding fixing post 32 correspond to one of the clutch assemblies 1, and the other end of the fixing member 3 and the corresponding fixing post 32 correspond to another clutch assembly 1; or at least two of the multiple fixing posts 32 have different shapes and / or sizes, and a hole is formed on the outer hub 11 of the clutch assembly 1 to mate with them, thereby enabling the fixing member 3 to be installed and mated to the corresponding clutch assembly 1 in a predetermined manner in the mating structure.

Claims

1. A dual clutch comprising: two clutch assemblies (1), each of the clutch assemblies (1) including an outer hub (11), an inner hub (12), and a clutch unit (13) between the outer hub (11) and the inner hub (12); a centering slave cylinder (2) for being mounted between the two clutch assemblies (1) in an axial direction of the dual clutch and for controlling engagement or disengagement of the clutch units (13); and a fixing member (3) for the dual clutch, the fixing member (3) including: a body portion (31) formed in a plate shape in a manner matching a portion of an outer circumferential profile of both of the clutch assemblies (1) and the centering slave cylinder (2) of the dual clutch; and a plurality of fixing portions for connecting with the clutch assemblies (1), the fixing member (3) being detachably mountable to the two clutch assemblies (1) so as to relatively fix the two clutch units (13) and the centering slave cylinder (2) at least in the axial direction of the dual clutch. The body portion (31) is an arc-shaped plate. The fixing member (3) further includes a holding portion (33) formed in the body portion (31) for holding the fixing member (3) when mounting / dismounting the fixing member (3).

2. The dual clutch of claim 1, wherein, The holding portion (33) includes at least one component formed in the body portion (31), the component being at least one of a hole, a post, a hook, and a ring.

3. The dual clutch of claim 1, wherein, 5. The dual clutch according to claim 1, wherein 4. The dual clutch of claim 3, wherein, the plurality of fixing portions are formed as a plurality of fixing posts (32) protruding from the body portion (31) toward one side, the plurality of fixing posts (32) being located at both end portions of the body portion (31), and at each end portion of the body portion (31), a plurality of the fixing posts (32) are sequentially arranged in one direction. The fixing posts (32) are connected in cooperation with holes of the outer hubs (11), wherein a diameter of the fixing posts (32) is smaller than a diameter of the holes of the outer hubs (11). An outer peripheral portion of the outer hub (11) is formed with lubricating oil holes for entry or exit of lubricating oil into or out of the clutch assemblies (1), the lubricating oil holes serving as the holes (11h) that cooperate with the fixing portions of the fixing member (3).

6. The dual clutch of claim 5, wherein, A plurality of the fixing members (3) are mountable to the two clutch assemblies (1) in a manner evenly distributed in a circumferential direction of the dual clutch.

7. A dual clutch according to claim 5 or 6, characterized in that Holes (11h) of the plurality of lubricating oil holes for cooperating with the fixing posts (32) of the fixing member (3) are marked or have different arrangements and / or cross-sectional shapes from other lubricating oil holes.

8. The dual clutch of claim 1 or 2, wherein, The outer peripheral portion of the outer hub (11) is formed with a plurality of sets of holes exclusively for cooperating with the fixing posts (32) of the fixing member (3).

9. The dual clutch of claim 7, wherein, 11. An assembling method of a transmission including the dual clutch according to any one of claims 1 to 10, the assembling method including:

10. The dual clutch of claim 5 or 6, wherein, ​ ​ First, the two clutch assemblies and the centering driven cylinder are assembled together by connecting the two clutch assemblies with the double clutch fixing member, so that the two clutch assemblies and the centering driven cylinder located between the two clutch assemblies are relatively fixed at least in the axial direction of the shaft of the transmission, forming a pre-assembled double clutch assembly; Second, the transmission mechanism including the pre-assembled double clutch assembly is installed into the housing body of the transmission, the axial dimension of the transmission mechanism and the axial space dimension of the housing body are measured, and based on the measurement results, a gasket is assembled between the housing body of the transmission and the transmission mechanism, and then the double clutch fixing member is disassembled.

12. An assembling method of a transmission including the double clutch according to any one of claims 1 to 10, the assembling method comprising: First, the transmission mechanism including the double clutch is sleeved on the shaft, so that the two clutch assemblies (1) are arranged side by side in the axial direction of the shaft in a manner of sandwiching the centering driven cylinder (2); Second, the shaft on which the transmission mechanism is sleeved is installed into the housing body of the transmission, the double clutch fixing member (3) is connected to the clutch assemblies (1), so that the two clutch assemblies (1) and the centering driven cylinder (2) located between the two clutch assemblies (1) are relatively fixed; Third, the axial dimension of the transmission mechanism and the axial space dimension of the housing body are measured, and based on the measurement results, a gasket is assembled between the housing body of the transmission and the transmission mechanism, and then the double clutch fixing member (3) is disassembled.

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