Wet clutch, assembly tool and assembly method

Abstract

The application provides a wet clutch, an assembling tool and an assembling method, the wet clutch comprising a main body, a first shell and a second shell, the first shell being arranged outside the second shell; a plurality of friction plates arranged between the first shell and the second shell in a first direction, an inner side wall of each friction plate being provided with a spline, and the width of the splines of the plurality of friction plates arranged in the first direction gradually increasing; and an output gear connected with the second shell, the output gear being provided with a through hole. The wet clutch improves the width of the splines of the plurality of friction plates, so that the accuracy of assembly can be ensured when the plurality of friction plates are assembled with the second shell, the friction plates are prevented from being wrongly or missed assembled, and the assembly is prevented from being out of place due to blind assembly of the clutch.

Description

Technical Field

[0001] This application relates to the field of clutch technology, and in particular to a wet clutch, assembly tooling and assembly method. Background Technology

[0002] With the rapid development of hybrid vehicle technology, hybrid transmissions, as one of the key components of hybrid vehicles, face new requirements in terms of function, quality, cost, and integrated layout. The location of the wet clutch varies in different hybrid transmission configurations, and the functions it provides also differ. Currently, most hybrid transmission clutches are located inside the transmission and are used for transmitting or disconnecting engine torque, mode switching, and gear shifting, but not for starting. Due to the integration requirements of the transmission and the need to shorten the axial space, the inner and outer housings of the clutch are directly connected to the shaft gears by welding or bolts.

[0003] However, during assembly, issues such as improper assembly of the clutch inner housing or jamming, and misalignment of the friction plates can easily occur. Currently, clutch assembly is done blindly, relying on the assembly worker's experience, as it is impossible to visually determine whether the assembly is complete. Once an abnormality occurs in the clutch assembly, it is only noticed when an abnormality appears in the transmission or the entire vehicle, requiring a return to the factory for inspection. Furthermore, the clutch must be completely disassembled to confirm the cause, resulting in time and financial losses.

[0004] Therefore, it is necessary to design a wet clutch, assembly tooling, and assembly method to solve the above problems. Summary of the Invention

[0005] In view of this, in order to overcome the shortcomings of the prior art, the present invention provides a wet clutch, assembly fixture and assembly method, which effectively solves the problem that the existing clutch assembly is blind assembly. Based on the assembly experience of the assembly workers, it is impossible to identify whether the assembly is completed by visual inspection. Once the clutch assembly is abnormal, it can only be detected when the abnormality occurs in the transmission or the whole vehicle. Moreover, the clutch needs to be completely disassembled to confirm the cause, which will cause time and economic losses.

[0006] According to a first aspect of the present invention, a wet clutch is provided, wherein the wet clutch includes a body, including a first housing and a second housing, the first housing being disposed outside the second housing; a plurality of friction plates disposed between the first housing and the second housing in a first direction, each of the friction plates having a spline on its inner sidewall, the width of the splines of the plurality of friction plates disposed in the first direction gradually increasing; and an output gear connected to the second housing, the output gear having a through hole.

[0007] Preferably, each of the friction pads has an insertion portion on its inner sidewall.

[0008] Preferably, the main body further includes a plurality of first steel sheets, which are arranged alternately with the plurality of friction plates in the first direction between the first housing and the second housing; the main body further includes an end cap and an adjusting ring, the end cap being disposed between the first housing and the second housing, the end face of the end cap in the first direction being aligned with the side face of the first housing in the first direction, and the adjusting ring being disposed between the end cap and the first steel sheets.

[0009] Preferably, the wet clutch further includes a drive piston disposed inside the first housing, the drive piston having its end face in the first direction abutting against the first steel plate disposed in the first direction.

[0010] According to the wet clutch of the present invention, by improving the spline width of multiple friction plates, the assembly accuracy of multiple friction plates can be guaranteed when they are assembled with the second housing, avoiding misassembly or omission of friction plates, and avoiding incomplete assembly due to blind assembly of the clutch.

[0011] According to a second aspect of the present invention, an assembly fixture is provided, wherein the assembly fixture includes an axial measuring component, an axial positioning component, and a clamping disc; the axial measuring component includes a snap-fit ​​portion and a measuring portion; the snap-fit ​​portion has a first groove; the measuring portion has a plurality of second grooves in a first direction, the first groove and the plurality of second grooves being disposed back-to-back; the axial positioning component includes a positioning portion and a connecting portion; the connecting portion has a plurality of third grooves in the first direction; the clamping disc includes a first connecting portion and a second connecting portion; the first connecting portion is disposed corresponding to the second grooves, and the second connecting portion is disposed corresponding to the third grooves.

[0012] Preferably, a first isolation block is provided between every two adjacent second grooves; and a second isolation block is provided between every two adjacent third grooves.

[0013] Preferably, the clamping disc is formed into an arc-shaped structure, the first connecting part is disposed on the side of the second connecting part, and a protruding key is disposed in the middle of the second connecting part.

[0014] According to the assembly fixture of the present invention, by utilizing the cooperation of the axial measuring component, the axial positioning component and the clamping plate, it is possible to quickly determine whether the internal parts of the wet clutch are assembled in place. At the same time, it is also possible to determine the cause of incomplete assembly and errors, which helps users to quickly assemble, ensures the speed and accuracy of assembly, reduces rework inspection, reduces working hours, and improves efficiency and economic benefits.

[0015] According to a third aspect of the present invention, an assembly method is provided, wherein the assembly method uses the assembly fixture described above to assemble the wet clutch, the assembly method comprising: defining the distance between the end faces of the drive piston and the adjusting ring facing each other in the first direction as X1; defining the width of the adjusting ring as X2; positioning the distance between the end face of the adjusting ring facing away from the drive piston and the end face of the end cover in the first direction as X3; defining the distance between the first groove and the adjacent sides of the first second groove formed in the first direction as X4, and X3 being greater than or equal to X4; positioning the width of the second groove in the first direction, the width of the third groove in the first direction, and the thickness of the clamping plate as D; defining the distance between the adjacent sides of two adjacent second grooves in the first direction as ΔX1; defining the length of the positioning portion in the first direction as X5; defining the distance between the adjacent sides of two adjacent third grooves in the first direction as ΔX2; and defining the length of the second housing in the first direction as Y. The axial measuring component is snapped onto the outer side wall of the first housing using the first groove, with the first groove facing the first housing. The clamping disc abuts against the end face of the end cap in the first direction, and the first connecting part snaps into the corresponding second groove. At this time, X3 = X4 + (n1-1) × (D + ΔX1). The multiple second grooves are numbered 1, 2, 3, 4... in the first direction, and n1 is the number. The assembly depth of the second housing of the wet clutch is H = X1 + X2 + X3 = X5 + (n2-1) × (D + ΔX1). 2) The numbering of the plurality of third grooves in the first direction is 1, 2, 3, 4..., n2 is the number, and X1, X2 and X5 are fixed values. Calculate n2; Insert the axial positioning member into the main body through the through hole to a depth of H; If the second connecting part connects with the corresponding numbered third groove, the internal components of the wet clutch are assembled in place; If the second connecting part cannot connect with the corresponding numbered third groove, the internal components of the wet clutch are not assembled in place or the machining dimensions of the second housing do not correspond; Disassemble the assembly fixture.

[0016] Preferably, if the second connecting part connects with the corresponding numbered third groove, the internal components of the wet clutch are assembled in place, the second housing and the output gear are assembled to the main body, and the output gear abuts against the clamping plate at its end face near the main body in the first direction, and then the assembly fixture is disassembled; if the second connecting part cannot connect with the corresponding numbered third groove, if the axial positioning member can continue to be inserted into the wet clutch, then the internal components of the wet clutch are missing during the assembly process; if the axial positioning member cannot continue to be inserted into the wet clutch, compare Y and H to determine whether the second housing is machined incorrectly.

[0017] Preferably, the axial positioning member passes through the through hole and is connected to the insertion portion of each friction piece.

[0018] According to the assembly method of the present invention, multiple friction plates are arranged using assembly tooling, and the clutch can also be judged as to whether it is properly assembled. Users can be aware of problems in the assembly process in a timely manner and resolve them in the transmission or vehicle in time, thereby improving efficiency, saving assembly time, and improving economic benefits.

[0019] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of a wet clutch according to an embodiment of the present invention is shown;

[0022] Figure 2 A partial structural schematic diagram of the friction pad according to an embodiment of the present invention is shown;

[0023] Figure 3 A partial structural schematic diagram of a wet clutch according to an embodiment of the present invention is shown;

[0024] Figure 4 A schematic diagram of the structure of an axial measuring element according to an embodiment of the present invention is shown;

[0025] Figure 5 A schematic diagram of the structure of an axial positioning member according to an embodiment of the present invention is shown;

[0026] Figure 6 A schematic diagram of the clamping disk according to an embodiment of the present invention is shown;

[0027] Figure 7 A schematic diagram showing the structure of a wet clutch and assembly tooling according to an embodiment of the present invention is provided.

[0028] Figure 8 An embodiment of the invention is shown. Figure 7 A partial structural diagram;

[0029] Figure 9 An embodiment of the invention is shown. Figure 7 Another part of the structural diagram.

[0030] Reference numerals: 101-First housing; 102-Second housing; 103-End cover; 104-Adjusting retaining ring; 2-Friction plate; 201-Spline; 3-Output gear; 301-Through hole; 401-First steel plate; 402-Second steel plate; 5-Drive piston; 6-Axial measuring component; 601-Snap-fit ​​part; 602-Measuring part; 603-First groove; 604-Second groove; 605-First isolation block; 7-Axial positioning component; 701-Positioning part; 702-Connecting part; 703-Third groove; 704-Second isolation block; 8-Clamping plate; 801-First connecting part; 802-Second connecting part; 803-Protruding key; 9-Input shaft tooth; 10-Sleeve; S1-First direction. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0032] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] According to a first aspect of the present invention, a wet clutch is provided, such as Figures 1 to 3 As shown, this wet clutch improves the internal structure through some structural improvements, making the assembly easier and improving the accuracy of the assembly. The wet clutch includes a main body, multiple friction plates 2 and an output gear 3.

[0036] In the following description, reference will be made to Figures 1 to 3 The detailed structure of the wet clutch body, the plurality of friction plates 2, and the output gear 3 is described in detail. Furthermore, the description of the embodiment refers to a first direction S1, which can be the axial direction of the wet clutch.

[0037] like Figure 1As shown, in this embodiment, the main body is fitted onto the input shaft gear 9. The main body may include a first housing 101 and a second housing 102. The first housing 101 is disposed on the outer side of the second housing 102. Here, the outer side can be, for example, the outer peripheral side, that is, the first housing 101 is fitted onto the outer peripheral side of the second housing 102. The first housing 101 can be understood as the outer shell of the clutch main body, and the second housing 102 can be understood as the inner shell of the clutch main body. The first housing 101 is fixedly connected to the input shaft gear 9, and the second housing 102 is fixedly connected to the output gear 3. The fixed connection can be, for example, welding or bolting; welding is used in this embodiment.

[0038] Preferably, such as Figure 1 As shown, in the embodiment, the output gear 3 may also have a through hole 301. The through hole 301 facilitates the insertion of the axial positioning part 7 of the assembly tooling, thereby enabling the determination of whether the components inside the main body are assembled in place.

[0039] Multiple friction plates 2 are disposed between the first housing 101 and the second housing 102 in the first direction S1. For example, the second housing 102 may be provided with a spline groove on the outer side wall, and each friction plate 2 may be provided with a spline 201 on the inner side wall, and spline engagement may be achieved through the spline groove and the spline 201.

[0040] Preferably, such as Figures 1 to 3 As shown, in this embodiment, the width of the splines 201 of the plurality of friction pads 2 disposed in the first direction S1 gradually increases; the width of the splines 201 can be, for example, [missing information]. Figure 2 The width W1 indicated is defined as the width difference ΔW1 between adjacent splines 201 in the first direction S1. That is, the width of the splines 201 of the friction plates 2 arranged in the first direction S1 increases by ΔW1 sequentially. Correspondingly, the widths of the multiple spline grooves opened on the outer wall of the second housing 102 in the first direction S1 correspond one-to-one with the widths of the splines 201 of the multiple friction plates 2. By setting splines 201 of friction plates 2 with different widths, it is convenient to accurately position and install friction plates 2 at different positions. Secondly, if one friction plate 2 is not properly assembled, the other friction plates 2 cannot be assembled into the corresponding spline groove, enabling rapid and accurate assembly of multiple friction plates 2. Furthermore, the specific width of the spline 201 can be specifically selected according to different specifications and models of wet clutches, for example, three to ten millimeters, with adjacent widths increasing by one millimeter sequentially.

[0041] Preferably, in this embodiment, each friction plate 2 has an insertion portion on its inner sidewall. The inner sidewall of the friction plate 2 has a plurality of splines 201 arranged around its circumference. To facilitate the insertion and adjustment of the axial positioning member 7 of the assembly fixture described below, one of the splines 201 around its circumference is removed, creating a notch, i.e., the insertion portion. Furthermore, the width of the axial positioning member 7 corresponds to the spline 201 with the smallest width. Thus, when the axial positioning member 7 passes through multiple friction plates 2, the multiple friction plates 2 can be assembled and adjusted, ensuring that the axial positioning member 7 passes through the insertion portion of each friction plate 2. The neatly arranged multiple friction plates 2 facilitate the assembly of the second housing 102 and the output gear 3.

[0042] Preferably, such as Figures 1 to 3 As shown, in this embodiment, the main body may further include a plurality of first steel plates 401. The plurality of first steel plates 401 and a plurality of friction plates 2 are alternately arranged between the first housing 101 and the second housing 102 in the first direction S1. The plurality of first steel plates 401 can be keyed to the first housing 101. The keying method can be that each of the plurality of first steel plates 401 has a connecting key on its outer periphery, and the inner periphery of the first housing 101 has a keyway corresponding to the connecting key. The number of the plurality of first steel plates 401 corresponds to the number of the plurality of friction plates 2, and in this embodiment, both can be four.

[0043] Preferably, such as Figures 1 to 3 As shown, in the embodiment, the main body may also include a second steel sheet 402, which is disposed close to the output gear 3 in the first direction S1.

[0044] Preferably, such as Figure 1 and Figure 3 As shown, in this embodiment, the main body may further include an end cap 103 and an adjusting ring 104. The end cap 103 is disposed between the first housing 101 and the second housing 102. The end face of the end cap 103 in the first direction S1 is aligned with the side face of the first housing 101 in the first direction S1. The adjusting ring 104 is disposed between the end cap 103 and the first steel sheet 401. The adjusting ring 104 can adjust the assembly spacing inside the main body.

[0045] Thus, the assembly method of the wet clutch body, multiple first steel plates 401, multiple friction plates 2, and second steel plates 402 is as follows: First, the first housing 101 is fitted onto the input shaft gear 9 and welded to it. Then, a first steel plate 401 is installed inside the first housing 101, followed by a friction plate 2, and so on, until all the same number of first steel plates 401 and friction plates 2 are installed. Finally, a second steel plate 402 is installed, which supports and presses against the clutch engagement pressure. Next, the adjusting ring 104 and end cover 103 are installed. Finally, the second housing 102 and the output gear 3 welded to it are pushed into the assembly gap.

[0046] It should also be noted that the clutch body also includes other parts, such as seals, return springs, and balance pistons. These parts, their assembly processes, and assembly connection methods are all existing technologies and are known to those skilled in the art, so they will not be described in detail here.

[0047] Preferably, such as Figure 1 and Figure 3 As shown, in this embodiment, the wet clutch may further include a drive piston 5, which is disposed inside the first housing 101. The end face of the drive piston 5 in the first direction S1 abuts against the first steel plate 401 disposed in the first direction S1. The drive piston 5 can be used to transmit driving force.

[0048] This wet clutch improves the spline width of multiple friction plates, ensuring accurate assembly when multiple friction plates are assembled with the second housing, avoiding incorrect or missing friction plates, and preventing incomplete assembly due to blind assembly of the clutch.

[0049] In addition, such as Figures 4 to 6 As shown, according to a second aspect of the present invention, an assembly fixture is provided that can be applied to the aforementioned wet clutch and assists the user in determining whether the internal parts of the wet clutch are properly assembled. Below, in conjunction with... Figures 4 to 6 Provide a detailed description of each component in this assembly fixture.

[0050] like Figures 4 to 6 As shown, in this embodiment, the assembly fixture includes an axial measuring element 6, an axial positioning element 7, and a clamping plate 8.

[0051] Specifically, as shown in 4, the axial measuring component 6 includes a snap-fit ​​part 601 and a measuring part 602 connected along the first direction S1. The snap-fit ​​part 601 and the measuring part 602 can be integrally formed components.

[0052] The snap-fit ​​part 601 is used to snap the axial measuring element 6 to the first housing 101 of the wet clutch, and the measuring part 602 is used to measure, for example, Figure 3The distance X3 shown is the distance between the end face of the adjusting ring 104 facing away from the drive piston 5 and the end face of the end cover 103 in the first direction S1.

[0053] Furthermore, it should be noted that the dimensions and optimal assembly distance of the aforementioned wet clutch are fixed values ​​before production and processing (during design), i.e., as shown... Figure 3 The values ​​of X1 and X2 are constants. In addition, the sum of the values ​​of X1, X2 and X3 should be the assembly depth of the second housing 102. However, due to the production process and the setting of tolerance allowances, the values ​​may deviate. At this time, the value at X3 is determined by the axial measuring component 6, so that the axial positioning component 7 can calculate the assembly depth of the second housing 102.

[0054] Preferably, such as Figure 3 and Figure 4 In this embodiment, the snap-fit ​​portion 601 has a first groove 603, and the measuring portion 602 has a plurality of second grooves 604 in the first direction S1. The first groove 603 and the plurality of second grooves 604 are arranged back to back. The width of the first groove 603 in the first direction S1 corresponds to the width of the snap ring stamping table (not shown) of the first housing 101. The first groove 603 can snap onto the snap ring stamping table to fix the axial measuring component 6. The width of the plurality of second grooves 604 in the first direction S1 corresponds to the width of the clamping plate 8, so that the clamping plate 8 can snap onto the second grooves 604.

[0055] Preferably, such as Figure 4 As shown, in the embodiment, a first isolation block 605 is provided between every two adjacent second grooves 604, and the first isolation block 605 is used to separate two adjacent second grooves 604.

[0056] like Figure 4 As shown, in this embodiment, X4 is the distance between the adjacent sides of the first groove 603 and the first second groove 604 opened in the first direction S1; D is the width of the second groove 604 in the first direction S1 (which is also the thickness of the clamping plate 8); ΔX1 is the distance between the adjacent sides of two adjacent second grooves 604 in the first direction S1. Furthermore, it should be noted that since the first housing 101 and end cap 103 are designed first, and the axial measuring element 6 is designed later, the width of X4 should be less than or equal to X3 for ease of measurement.

[0057] like Figure 5As shown, in this embodiment, the axial positioning member 7 includes a positioning part 701 and a connecting part 702. The positioning part 701 and the connecting part 702 are connected in the first direction S1, and the positioning part 701 and the connecting part 702 can be integrally formed components. The positioning part 701 is used to extend into the interior of the main body and can cooperate with multiple friction plates 2 to assist in aligning the friction plates 2, positioning the second housing 102 to the required insertion depth, and determining whether the second housing 102 can be assembled in place. The connecting part 702 is used to connect to the clamping plate 8 and determine the assembly depth of the second housing 102 at this time.

[0058] Preferably, such as Figure 5 As shown, in the embodiment, the connecting part 702 has a plurality of third grooves 703 in the first direction S1. The width of the third groove 703 in the first direction S1 corresponds to the thickness of the clamping disk 8. The clamping disk 8 can be snapped into the third groove 703.

[0059] Preferably, such as Figure 5 As shown, in the embodiment, a second isolation block 704 is provided between every two adjacent third grooves 703.

[0060] like Figure 5 As shown, in the embodiment, X5 is the length of the positioning part 701 in the first direction S1; D is the width of the third groove 703 in the first direction S1; ΔX2 is the distance between the close sides of two adjacent third grooves 703 in the first direction S1.

[0061] like Figure 6 As shown, in the embodiment, the clamping disk 8 may include a first connecting part 801 and a second connecting part 802. The first connecting part 801 is disposed corresponding to the second groove 604, and the second connecting part 802 is disposed corresponding to the third groove 703.

[0062] Preferably, such as Figure 6 As shown, in the embodiment, the clamping disk 8 can be formed into an arc-shaped structure, the first connecting part 801 is disposed on the side of the second connecting part 802, and the second connecting part 802 is provided with a protruding key 803 in the middle, which is engaged with the third groove 703.

[0063] like Figure 7 As shown, the method of using this assembly fixture is as follows: First, the axial measuring component 6 is snapped into the retaining ring stamping table of the first housing 101 through the first groove 603 of the axial measuring component 6. The clamping plate 8 is then abutted against the end face of the first housing 101 (that is, against the end face of the end cover 103). The first connecting part 801 of the clamping plate 8 is snapped into the second groove 604 of the axial measuring component 6. At this time, X3 = X4 + (n1 - 1) × (D + ΔX1). The multiple second grooves 604 are numbered 1, 2, 3, 4... in the first direction S1, and n1 is the number, as shown in the figure. Figure 8 and Figure 9 As shown, the first connecting part 801 is engaged with the second groove 604 numbered 1, so n1 is 1, that is, X3 = X4, and so on. The value of X3 can be obtained by the axial measuring part 6. Next, calculate the distance that the axial positioning part 7 should be inserted (i.e., the assembly depth of the second housing 102), the assembly depth is H, and the length of the second housing 102 in the first direction S1 after production and processing is Y, H = X1 + X2 + X3 = X5 + (n2 - 1) × (D + ΔX2), the multiple third grooves 703 are numbered 1, 2, 3, 4... in the first direction S1, n2 is the number, since X1, X 2、 X3, D, ΔX2, and X5 are constants, so the value of n2 can be calculated, which means we know which third groove 703 the second connecting part 802 of the clamping disk 8 should mate with. For example, if n2 is 3, then the second connecting part 802 of the clamping disk 8 should engage with the third third groove 703. The positioning part 701 of the axial positioning member 7 is inserted into the main body through the through hole 301. The axial positioning member 7 can be understood as one of the splines of the friction plates 2, and it mates with the insertion parts of multiple friction plates 2. When the axial positioning member 7 is inserted into the main body, the positioning part 701 of the axial positioning member 7 can neatly arrange the multiple friction plates 2, facilitating the subsequent insertion of the second housing 102 and its engagement with the splines 201 of the multiple friction plates 2. If the second connecting part 802 of the clamping disk 8 cannot mate with the third groove 703 numbered n2, then there is an assembly problem or a problem with the manufacturing of the second housing 102.

[0064] Preferably, the calculated n2 is set to 3. If the second connecting part 802 of the clamping disk 8 can only cooperate with the third groove 703 of the axial positioning part 7 with a number less than 3, compare H and Y. If H = Y (it should be noted that due to the setting of machining error and tolerance allowance, these two values ​​can be approximated, and the specific values ​​can be known by those skilled in the art), then the machining and production of the second housing 102 is correct, but the parts inside the main body are assembled incorrectly or are over-assembled; if H ≠ Y (the difference between these two values ​​is too large), then the machining of the second housing 102 is incorrect.

[0065] Preferably, the calculated n2 is set to 3. If the second connecting part 802 of the clamping disk 8 can only cooperate with the third groove 703 of the axial positioning part 7 with a number greater than 3, then the parts inside the main body are assembled incorrectly or incompletely.

[0066] Preferably, the calculated n2 is set to 3. If the second connecting part 802 of the clamping disc 8 is exactly engaged with the third groove 703 of the axial positioning member 7 numbered 3, the clutch is assembled in place. At this time, since the multiple friction plates 2 are neatly arranged by the axial positioning member 7, it is only necessary to push the second housing 102 into the gap of the clutch body to achieve assembly. When the input shaft tooth 9 welded to the second housing 102 abuts against the clamping disc 8, the assembly is in place.

[0067] Preferably, such as Figure 7 As shown, in this embodiment, the assembly fixture may also include a sleeve 10, which can be fitted around the outer periphery of the input shaft tooth 9. The sleeve 10 allows the input shaft tooth 9 to be vertically positioned on the assembly table, facilitating the assembly of the axial measuring component 6, the axial positioning component 7, and the clamping plate 8.

[0068] This assembly fixture utilizes the cooperation of axial measuring components, axial positioning components, and clamping discs to quickly determine whether the internal parts of the wet clutch are properly assembled. It can also identify the causes of incomplete or incorrect assembly, helping users to quickly assemble the parts and ensuring speed and accuracy. This reduces rework, reduces labor time, and improves efficiency and economic benefits.

[0069] Furthermore, according to a third aspect of the present invention, an assembly method is provided, wherein the assembly method uses the aforementioned assembly fixture to assemble the aforementioned wet clutch. The assembly method includes:

[0070] First step, such as Figures 3 to 5 As shown, the distance between the facing end faces of the drive piston 5 and the adjusting ring 104 in the first direction S1 is defined as X1; the width of the adjusting ring 104 is defined as X2; the distance between the end face of the adjusting ring 104 facing away from the drive piston 5 and the end face of the end cap 103 in the first direction S1 is defined as X3; the distance between the adjacent sides of the first groove 603 and the first second groove 604 opened in the first direction S1 is defined as X4, and X3 is greater than or equal to X4; the width of the second groove 604 in the first direction S1, the width of the third groove 703 in the first direction S1, and the thickness of the clamping plate 8 are defined as D; the distance between the adjacent sides of two adjacent second grooves 604 in the first direction S1 is defined as ΔX1; the length of the positioning part 701 in the first direction S1 is defined as X5; the distance between the adjacent sides of two adjacent third grooves 703 in the first direction S1 is defined as ΔX2; and the length of the second housing 102 in the first direction S1 is defined as Y.

[0071] In the second step, the axial measuring component 6 is snapped onto the outer wall of the first housing 101 using the first groove 603, with the first groove 603 facing the first housing 101. The clamping disc 8 is used to abut against the end face of the end cap 103 in the first direction S1. The first connecting part 801 is snapped onto the corresponding second groove 604. At this time, X3 = X4 + (n1-1) × (D + ΔX1). The multiple second grooves 604 are numbered 1, 2, 3, 4... in the first direction S1, and n1 is the number.

[0072] The third step is to assemble the second housing 102 of the wet clutch with a depth of H = X1 + X2 + X3 = X5 + (n2 - 1) × (D + ΔX2). The multiple third grooves 703 are numbered 1, 2, 3, 4 ... in the first direction S1. n2 is the number, and X1, X2, X3, D, ΔX2 and X5 are fixed values. Calculate n2.

[0073] Fourth step, insert the axial positioning component 7 into the main body through the through hole 301, with an insertion depth of H;

[0074] Fifth step: If the second connecting part 802 connects with the corresponding numbered third groove 703, the internal components of the wet clutch are assembled in place; if the second connecting part 802 cannot connect with the corresponding numbered third groove 703, the internal components of the wet clutch are not assembled in place or the machining dimensions of the second housing 102 do not correspond.

[0075] Step 6: Disassemble and assemble the tooling.

[0076] Preferably, if the second connecting part 802 is connected to the corresponding numbered third groove 703, the internal components of the wet clutch are assembled in place, the second housing 102 and the output gear 3 are assembled to the main body, the end face of the output gear 3 near the main body in the first direction S1 abuts against the clamping plate 8, and the assembly is completed. Then the assembly tooling is disassembled.

[0077] If the second connecting part 802 cannot be connected to the corresponding numbered third groove 703, if the axial positioning member 7 can continue to be inserted into the wet clutch, then the internal components of the wet clutch are missing during the assembly process; if the axial positioning member 7 cannot continue to be inserted into the wet clutch, compare Y and H to determine whether the second housing 102 is machined incorrectly.

[0078] Specifically, three judgment processes are given as examples: First, assuming the calculated n2 is 3, if the second connecting part 802 of the clamping disc 8 can only mate with the third groove 703 of the axial positioning part 7 with a number less than 3, compare H and Y. If H = Y (it should be noted that due to machining errors and tolerance allowance settings, these two values ​​can be approximated; the specific values ​​are known to those skilled in the art), then the machining of the second housing 102 is correct, but the internal parts of the main body are incorrectly assembled or there are too many parts; if H ≠ Y (the difference between these two values ​​is too large), then the machining of the second housing 102 is incorrect. Second, assuming the calculated n2 is 3, if the second connecting part 802 of the clamping disc 8 can only mate with the third groove 703 of the axial positioning part 7 with a number greater than 3, then the internal parts of the main body are incorrectly assembled or there are too few parts. Third, assuming the calculated n2 is 3, if the second connecting part 802 of the clamping disc 8 exactly mates with the third groove 703 of the axial positioning part 7 with a number of 3, the clutch is properly assembled.

[0079] Preferably, the axial positioning member 7 passes through the through hole 301 and is connected to the insertion portion of each friction piece 2. Since the insertion portion is formed as a notch, the axial positioning member 7 can pass through the notch of each friction piece 2, thereby arranging the multiple friction pieces 2 neatly and preventing the friction pieces 2 from being distorted.

[0080] This assembly method can use assembly fixtures to arrange multiple friction plates, and can also judge whether the clutch is properly assembled. Users can know the problems in the assembly process in time and solve them in time before the transmission or the whole vehicle, improving efficiency, saving assembly time, and improving economic benefits.

[0081] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A wet clutch, characterized in that, The wet clutch includes: The main body includes a first housing and a second housing, wherein the first housing is disposed outside the second housing; Multiple friction plates are disposed between the first housing and the second housing in a first direction. Each friction plate has a spline on its inner sidewall, and the width of the spline of the multiple friction plates disposed in the first direction gradually increases. An output gear is connected to the second housing, and the output gear has a through hole; The second housing is provided with grooves that correspond one-to-one with the spline width of the multiple friction plates.

2. The wet clutch according to claim 1, characterized in that, Each of the friction pads has an insertion portion on its inner sidewall.

3. The wet clutch according to claim 2, characterized in that, The main body also includes a plurality of first steel sheets, which are arranged alternately with the plurality of friction sheets between the first housing and the second housing in the first direction; The main body also includes an end cap and an adjusting ring. The end cap is disposed between the first housing and the second housing. The end face of the end cap in the first direction is aligned with the side face of the first housing in the first direction. The adjusting ring is disposed between the end cap and the first steel sheet.

4. The wet clutch according to claim 3, characterized in that, The wet clutch further includes a drive piston, which is disposed inside the first housing, and the end face of the drive piston in the first direction abuts against the first steel plate disposed in the first direction.

5. An assembly fixture, based on the wet clutch as described in claim 4; characterized in that, The assembly fixture includes an axial measuring component, an axial positioning component, and a clamping plate. The axial measuring component includes a snap-fit ​​part and a measuring part. The snap-fit ​​part has a first groove, and the measuring part has a plurality of second grooves in a first direction. The first groove and the plurality of second grooves are arranged back to back. The snap-fit ​​part is used to snap the axial measuring element into the first housing of the wet clutch, and the measuring part is used to measure the distance between the end face of the adjusting ring facing away from the drive piston and the end face of the end cover in the first direction. The width of the first groove in the first direction corresponds to the width of the retaining ring stamping table of the first housing, so that the first groove is engaged with the retaining ring stamping table for fixing the axial measuring component; the width of the plurality of second grooves in the first direction corresponds to the width of the clamping plate, so that the clamping plate is engaged with the second grooves. The axial positioning component includes a positioning part and a connecting part, and the connecting part has a plurality of third grooves in the first direction; the clamping plate includes a first connecting part and a second connecting part, the first connecting part being disposed corresponding to the second groove, and the second connecting part being disposed corresponding to the third groove; The positioning part is used to extend into the interior of the main body and cooperate with multiple friction plates to align the friction plates, position the depth to which the second housing needs to be inserted, and determine whether the second housing can be assembled in place. The connecting part is used to connect the clamping plate and determine the assembly depth of the second housing.

6. The assembly fixture according to claim 5, characterized in that, A first isolation block is provided between every two adjacent second grooves; a second isolation block is provided between every two adjacent third grooves.

7. The assembly fixture according to claim 6, characterized in that, The clamping disc is formed into an arc-shaped structure, the first connecting part is disposed on the side of the second connecting part, and a protruding key is disposed in the middle of the second connecting part.

8. An assembly method, characterized in that, The assembly method uses the assembly fixture of any one of claims 5 to 7 to assemble the wet clutch of claim 4, and the assembly method includes: The distance between the facing end faces of the drive piston and the adjusting ring in the first direction is defined as X1; the width of the adjusting ring is defined as X2; the distance between the end face of the adjusting ring facing away from the drive piston and the end face of the end cap in the first direction is defined as X3; the distance between the first groove and the adjacent sides of the first second groove in the first direction is defined as X4, and X3 is greater than or equal to X4; the width of the second groove in the first direction, the width of the third groove in the first direction, and the thickness of the clamping plate are defined as D; the distance between the adjacent sides of two adjacent second grooves in the first direction is defined as... X1; the length of the positioning part in the first direction is defined as X5; the distance between the adjacent sides of two third grooves in the first direction is defined as... X2; Define the length of the second housing in the first direction as Y; The axial measuring element is snapped onto the outer side wall of the first housing using the first groove, with the first groove facing the first housing. The clamping disc abuts against the end face of the end cap in the first direction, and the first connecting part is snapped into the corresponding second groove. At this time, X3 = X4 + (n1-1) × (D + ... X1), the multiple second grooves are numbered 1, 2, 3, 4... in the first direction, and n1 is the number; The assembly depth of the second housing of the wet clutch is H = X1 + X2 + X3 = X5 + (n2 - 1) × (D + ... X2), the multiple third grooves are numbered 1, 2, 3, 4... in the first direction, n2 is the number, X1, X2 and X5 are determined values, and n2 is calculated; The axial positioning member is inserted into the main body through the through hole to a depth of H. If the second connecting part connects with the corresponding numbered third groove, the internal components of the wet clutch are assembled in place; if the second connecting part cannot connect with the corresponding numbered third groove, the internal components of the wet clutch are not assembled in place or the machining dimensions of the second housing are not corresponding. Disassemble the assembly fixture.

9. The assembly method according to claim 8, characterized in that, If the second connecting part is connected to the corresponding numbered third groove, the internal components of the wet clutch are assembled in place, the second housing and the output gear are assembled to the main body, the output gear abuts against the clamping plate on the end face of the main body in the first direction, and then the assembly fixture is disassembled. If the second connecting part cannot be connected to the corresponding numbered third groove, and if the axial positioning member can continue to be inserted into the wet clutch, then the internal components of the wet clutch are missing during the assembly process; if the axial positioning member cannot continue to be inserted into the wet clutch, compare Y and H to determine whether the second housing is machined incorrectly.

10. The assembly method according to claim 8, characterized in that, The axial positioning member is inserted through the through hole and connected to the insertion part of each friction piece.

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