An AMT clutch cover and diaphragm spring assembly riveting die

Abstract

The application discloses an AMT clutch cover and diaphragm spring assembly riveting die, which comprises a lower die plate, a lower backing plate, a lower fixed plate, a lower rivet, a middle positioning column, a cover positioning pin, a diaphragm positioning pin, an upper die plate, an upper backing plate, an upper fixed plate, an upper rivet, an upper rivet backing plate, a bending rivet, a middle fixed ring, a pressing block, a pre-pressing nitrogen spring, a bending nitrogen spring, a pressing nitrogen spring, a middle pull rod, a middle pull rod washer, a pre-pressing plate, a pre-pressing block, a bending rivet pull rod and a bending pull rod washer. The AMT clutch cover and diaphragm spring assembly riveting die is provided with three groups of different nitrogen springs, so that each part, such as the cover, the diaphragm spring, the disc spring and the supporting plate, can be riveted in a close state, then the tongue of the supporting plate is bent at an angle through the bending rivet, and finally the tongue of the supporting plate is bent by less than or equal to 90 degrees through the upper rivet, so that the AMT clutch cover and diaphragm spring assembly riveting assembly is completed, and the problems of needing two sets of riveting dies and two processes for riveting and low production efficiency in the current clutch industry for producing the AMT clutch are solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of riveting tooling for automobile clutch cover assembly, and particularly relates to a riveting die for an AMT clutch cover and diaphragm spring assembly. BACKGROUND

[0002] With the rapid development of the automobile industry and the demand for vehicle driving comfort, the AMT clutch is widely used in foreign passenger cars and commercial vehicles at present. In recent years, the domestic AMT clutch has also been rapidly developed and applied in commercial vehicles. Domestic clutch manufacturers have put forward more requirements for the production of AMT clutches in terms of process equipment and production efficiency; various riveting dies are needed for the assembly of each part of the AMT clutch cover assembly. At present, two sets of dies and two processes are needed to complete the assembly of the AMT clutch cover and diaphragm spring assembly in the domestic clutch industry.

[0003] In the research on clutch cover assembly riveting tooling, people have made a lot of achievements. For example, Chinese patent application No. CN201810574061.7 discloses a clutch cover assembly riveting die structure, which comprises a lower die and an upper die. The lower die comprises a lower bottom plate, a lower die pad plate, a lower die fixed plate and a lower pre-pressing plate supporting the pressure plate in the clutch cover assembly from bottom to top. The lower die fixed plate is provided with a strong glue block supporting the lower pre-pressing plate, a first lower die support column and a second lower die support column. The upper die comprises an upper bottom plate, an upper die pad plate and an upper pre-pressing plate from top to bottom. The upper pre-pressing plate is elastically connected to the lower surface of the upper die pad plate. The upper pre-pressing plate is annularly fixed with a pre-pressing block pressing the outer circumferential edge of the upper surface of the clutch cover. The lower surface of the upper die pad plate is fixedly connected through an upper die pad block with a first upper pressing die rod cooperating with the first lower die support column for riveting, and a second upper pressing die rod cooperating with the second lower die support column for riveting. This patent technology can complete the riveting of the clutch cover assembly at one time, has high riveting efficiency and stable riveting quality, and reduces labor intensity.

[0004] For example, Chinese Patent Application No. CN201822232045.8 discloses a clutch riveting forming tool. The tongue-turning die is transitionally matched with the positioning protrusion of the center shaft through the center hole. The tongue-turning die has a pin hole and a threaded hole. The tongue-turning die is positioned and fastened with the center shaft pin through the pin hole and the threaded hole. The tongue-turning die has a tongue-turning pressure head. The tongue-turning space is formed outside the tongue-turning pressure head. The tongue-turning die clamp sleeve is gap-fitted and installed between the tongue-turning dies. The tongue-turning die clamp sleeve is installed on the outer sleeve through the positioning pin and the fastening bolt. The outer sleeve is inserted on the guide column of the upper die. The pressure device is installed on the upper die. The pressure plug of the pressure device is fixedly connected with the outer sleeve. The pressure ring is installed below the tongue-turning die clamp sleeve. The position of the pressure ring corresponds to the outer edge of the diaphragm spring on the clutch cover assembly. The lower die forms the accommodation slot through the annular support table. The patent technology has simple structure and reasonable design. The tongue-turning process is completed at one time, thereby achieving high production efficiency, greatly saving personnel, equipment, and tooling. Since the tongue-turning is completed at one time, the product qualification rate is increased.

[0005] The above two patent technologies basically achieve the technical effect of improving production efficiency; however, they are not suitable for riveting and pressing of AMT clutch cover, diaphragm spring, and other parts. Because of the complexity of the structure of the AMT clutch cover assembly, i.e., the addition of the disc spring, and the need to overcome the disc spring force before riveting and pressing, the clutch cover assembly production industry still urgently needs a riveting and pressing tool suitable for AMT clutch cover, diaphragm spring, and other parts. SUMMARY

[0006] The present application aims to solve the problems in the prior art, such as the need for two sets of molds and two processes to complete the assembly of the AMT clutch cover and the diaphragm spring assembly, low production efficiency, and the like, and provides a riveting and pressing mold for the AMT clutch cover and the diaphragm spring assembly. The riveting and pressing mold of the present application achieves different functions through three different nitrogen gas springs. The pre-pressing nitrogen gas spring presses the parts tightly together. The diaphragm spring is riveted and pressed in the flattened state through the cooperation of the pressing nitrogen gas spring and the intermediate limiting column. The bending nitrogen gas spring bends the support plate by an angle, which is convenient for the final riveting of the upper riveting head. The mold is suitable for riveting and pressing of AMT clutch cover, diaphragm spring, and other parts. Only one set of mold and one process are needed to complete the riveting and pressing, which effectively reduces the labor intensity of workers, improves production efficiency, and contributes to energy saving and emission reduction.

[0007] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0008] An AMT clutch cover and diaphragm spring assembly riveting die, comprising a lower die plate, a lower base plate, a lower fixed plate, a lower rivet, a middle positioning column, a cover positioning pin, a limiting column, a diaphragm positioning pin, an upper die plate, an upper base plate, an upper fixed plate, an upper rivet, an upper rivet base plate, a guide device; the lower die plate, the lower base plate, the lower fixed plate, the lower rivet, the middle positioning column, the cover positioning pin, the limiting column and the diaphragm positioning pin are coaxially assembled; the cover positioning pin and the diaphragm positioning pin are assembled on the lower base plate and require interference fit; the middle limiting column is assembled on the center of the lower base plate by means of a screw III; the lower base plate is assembled on the lower die plate by means of a screw II; the lower rivet is assembled on the lower fixed plate, and then the two are fixed on the lower base plate by means of a screw I and a cylindrical pin; wherein:

[0009] It also comprises a bending rivet, a middle fixed ring, a pressing block, a pre-pressing nitrogen spring, a bending nitrogen spring, a pressing nitrogen spring, a middle pull rod, a middle pull rod washer, a pre-pressing plate, a pre-pressing block, a bending rivet pull rod and a bending pull rod washer;

[0010] One end of the middle fixed ring is embedded in the upper fixed plate and is fixed on the upper fixed plate by means of a screw VIII;

[0011] The bending rivet is assembled on the outer ring of the middle fixed ring; the bending nitrogen spring is assembled between the bending rivet and the upper base plate, and one end of the bending nitrogen spring is embedded in the bending rivet and is fixed by means of a screw IX; the bending rivet pull rod passes through the bending rivet, the upper base plate, the upper fixed plate and the bending pull rod washer, and finally they are fixed by means of a screw VI;

[0012] The pressing block is assembled in the inner ring of the middle fixed ring; the pressing nitrogen spring is assembled between the pressing block and the upper fixed plate, and one end of the pressing nitrogen spring is embedded in the pressing block and is fixed by means of a screw X; the middle pull rod passes through the pressing block, the upper fixed plate and the middle pull rod washer, and finally they are fixed by means of a screw XI;

[0013] The pre-pressing plate is assembled on the outer ring of the bending rivet; the pre-pressing block is assembled on the pre-pressing plate; the pre-pressing nitrogen spring is assembled between the pre-pressing plate and the upper fixed plate, and one end of the pre-pressing nitrogen spring is embedded in the upper fixed plate and is fixed by means of a screw V;

[0014] The upper die plate, the upper base plate, the upper fixed plate, the upper rivet base plate, the upper rivet, the bending rivet, the middle fixed ring, the pressing block and the pre-pressing plate are coaxially assembled.

[0015] The application of three groups of different nitrogen springs realizes different functions, the pre-pressing nitrogen spring tightly presses each part together, the diaphragm spring is riveted in the flattened state through the cooperation of the pressing nitrogen spring and the middle limiting column, the bending nitrogen spring bends the support plate by an angle, which is convenient for the final riveting of the upper rivet, and the original problem of completing the assembly by using two sets of molds and two processes is effectively solved.

[0016] As a further preferred improvement of the present application, the bottom outer edge of the bending rivet head is provided with a conical inclined surface with an alpha angle.

[0017] As a further preferred improvement of the present application, the upper rivet head is provided with an upper rivet head tongue, and the pre-pressing plate is provided with a pre-pressing plate accommodation slot, and the upper rivet head tongue is embedded in the pre-pressing plate accommodation slot.

[0018] As a further preferred improvement of the present application, the guide device and the limiting column are respectively installed on both sides between the lower die plate and the upper die plate.

[0019] Compared with the prior art, the present application has the beneficial effects that:

[0020] The present application has the advantages of reasonable design, simple structure, high production efficiency, and high device processing qualification rate. In view of the technical problems that two sets of molds and two processes are required for assembling the cover assembly, three different nitrogen gas springs are additionally provided to realize different functions, the pre-pressing nitrogen gas spring presses the parts together, the middle limiting column cooperates with the pressing nitrogen gas spring to rivet the diaphragm spring in the flattened state, and the bending nitrogen gas spring bends the support plate by an angle, thereby facilitating the final riveting of the upper rivet head and solving the problem of assembling by using two sets of molds and two processes. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic diagram of an embodiment of the present application.

[0022] Figure 2 is a structural schematic diagram of a mold for assembling and riveting the cover and the diaphragm spring according to an embodiment of the present application.

[0023] Figure 3 is a structural schematic diagram of the assembly of the clutch cover and the diaphragm spring.

[0024] Figure 4 is a side view of Figure 3 .

[0025] Figure 5 is a structural schematic diagram of a mold bending rivet head part.

[0026] Figure 6 is a structural schematic diagram of a mold pre-pressing plate part.

[0027] Figure 7 is a structural schematic diagram of a mold upper rivet head part.

[0028] Figure 8 is a structural schematic diagram of a mold upper rivet head tongue part.

[0029] Reference numerals: 1-Lower template; 2-Lower pad; 3-Screw I; 4-Screw II; 5-Intermediate limiting post; 6-Screw III; 7-Diaphragm positioning pin; 8-Lower fixing plate; 9-Internal threaded cylindrical pin; 10-Cover positioning pin; 11-Lower rivet head; 12-Pressure block; 13-Pre-pressure block; 14-Pre-pressure plate; 14-1-Pre-pressure plate clearance groove; 15-Screw IV; 16-Pre-pressure nitrogen spring; 17-Upper fixing plate; 18-Screw V; 19-Upper template; 20-Upper pad; 21-Bending rivet head tie rod; 22-Screw VI; 23-Bending rivet head tie rod; 24-Bent tie rod washer; 25-Intermediate fixing ring; 26-Intermediate tie rod washer; 27-Cylindrical pin; 28-Screw VII; 29-Upper rivet head pad; 30-Upper rivet head; 30-1-Upper rivet head tongue; 31-Bent nitrogen spring; 32-Compressing nitrogen spring; 33-Bent rivet head; 33-1-Bent rivet head conical slope; 34-Guide device; 35-Limiting post; 36-Clutch cover and diaphragm spring assembly; 36-1-Cover; 36-2-Diaphragm spring; 36-3-Support plate; 36-4-Disc spring. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments to help those skilled in the art to have a more complete, accurate and in-depth understanding of the present invention.

[0031] Example 1:

[0032] like Figure 1 As shown, an AMT clutch cover and diaphragm spring assembly riveting mold includes a lower template 1, a lower pad 2, a lower fixing plate 8, a lower riveting head 11, a central positioning post 5, a cover positioning pin 10, a limiting post 35, a diaphragm positioning pin 7, an upper template 19, an upper pad 20, an upper fixing plate 17, an upper riveting head 30, an upper riveting head pad 29, and a guide device 34. The lower template 1, lower pad 2, lower fixing plate 8, lower riveting head 11, central positioning post 5, cover positioning pin 10, limiting post 35, and diaphragm positioning pin 7 are coaxially assembled. The cover positioning pin 10 and diaphragm positioning pin 7 are mounted on the lower pad 2 with an interference fit. The central limiting post 5 is mounted at the center of the lower pad 2 with screw III 6. The lower pad 2 is assembled on the lower template 1 by screw II 4. The lower riveting head 11 is mounted on the lower fixing plate 8, and then both are fixed to the lower pad 2 by screw I 3 and cylindrical pin 9.

[0033] in:

[0034] It also includes a bending rivet head 33, an intermediate fixing ring 24, a clamping block 12, a pre-compression nitrogen spring 16, a bending nitrogen spring 31, a clamping nitrogen spring 32, an intermediate tie rod 26, an intermediate tie rod washer 25, a pre-compression plate 14, a pre-compression block 13, a bending rivet head tie rod 21, and a bending tie rod washer 23;

[0035] The intermediate fixed ring 24 is inlaid in the upper fixed plate 17 at one end, and is fixed on the upper fixed plate 17 by the screw VIII;

[0036] The bending rivet head 33 is installed on the outer ring of the intermediate fixed ring 24; the bending nitrogen gas spring 31 is installed between the bending rivet head 33 and the upper pad plate 20, and one end of the bending nitrogen gas spring 31 is inlaid in the bending rivet head 33 and is fixed by the screw IX; the bending rivet head pull rod 21 passes through the bending rivet head 33, the upper pad plate 20, the upper fixed plate 17 and the bending pull rod gasket 23, and finally is fixed by the screw VI 22;

[0037] The pressing block 12 is installed in the inner ring of the intermediate fixed ring 24; the pressing nitrogen gas spring 32 is installed between the pressing block 12 and the upper fixed plate 17, and one end of the pressing nitrogen gas spring 32 is inlaid in the pressing block 12 and is fixed by the screw X; the intermediate pull rod 26 passes through the pressing block 12, the upper fixed plate 17, the intermediate pull rod gasket 25, and finally is fixed by the screw XI;

[0038] The pre-pressing plate 14 is installed on the outer ring of the bending rivet head 33; the pre-pressing block 13 is installed on the pre-pressing plate 14; the pre-pressing nitrogen gas spring 16 is installed between the pre-pressing plate 14 and the upper fixed plate 17, and one end of the pre-pressing nitrogen gas spring 16 is inlaid in the upper fixed plate 17 and is fixed by the screw V;

[0039] The upper die plate 19, the upper pad plate 20, the upper fixed plate 17, the upper rivet head pad plate 29, the upper rivet head 30, the bending rivet head 33, the intermediate fixed ring 24, the pressing block 12, and the pre-pressing plate 14 are coaxially assembled.

[0040] The bottom outer edge of the bending rivet head 33 is provided with a conical inclined surface 33-1 with an α angle.

[0041] The upper rivet head 30 is provided with an upper rivet head tongue 30-1; the pre-pressing plate 14 is provided with a pre-pressing plate accommodation slot 14-1, and the upper rivet head tongue 30-1 is inlaid in the pre-pressing plate accommodation slot 14-1.

[0042] The guide device 34 and the limiting column 35 are respectively installed on both sides between the lower die plate 1 and the upper die plate 19.

[0043] As Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, in operation, the clutch cover and diaphragm spring assembly 36 composed of various parts is placed on the lower rivet head 11, the clutch cover and diaphragm spring assembly 36 is positioned by two symmetrical pin holes of the cover 36-1 and two symmetrical slots of the diaphragm spring 36-2 respectively, the mold is lowered along with the hydraulic machine, the pre-pressing block 13 first presses the disc spring 36-4, the disc spring 36-4 and the cover 36-1 are pressed and adhered together by the spring force of the pre-pressing nitrogen spring 16, the disc spring 36-4 is pressed flat under the action of the spring force, i.e. the pre-pressing is completed. Then, the mold continues to be lowered along with the hydraulic machine, the pressing block 12 presses the diaphragm spring 36-2 downward to the upper end surface of the intermediate limiting column 5, and the pressing block 12 is in contact and adhered with the intermediate limiting column 5, at this time the pressing block 12 is limited by the intermediate limiting column 5 and cannot be lowered any more. Then, the mold continues to be lowered along with the hydraulic machine, the conical inclined surface 33-1 of the bending rivet head 33 bends each tongue of the support plate 36-3 outward until the lower end surface of the bending rivet head 33 is in contact and adhered with the pressing block 12, the bending rivet head 33 is limited by the pressing block 12, i.e. the bending rivet head 33 cannot be lowered any more, at this time each tongue of the support plate 36-3 is bent outward by an angle α by the conical inclined surface 33-1 of the bending rivet head 33; at the same time, the pre-pressing block 13 and the pressing block 12 remain in the original state, and the pre-pressing nitrogen spring 16 and the pressing nitrogen spring 32 continue to be compressed. Finally, the mold continues to be lowered along with the hydraulic machine, the upper rivet head 30 re-rivets each tongue of the support plate 36-3 bent at an angle α, the mold is limited by the upper end surface of the limiting column 35 when the hydraulic machine reaches the upper end surface, each tongue of the support plate 36-3 is bent to ≤90°, at this time the pre-pressing nitrogen spring 16, the pressing nitrogen spring 32 and the bending nitrogen spring 31 continue to be compressed; the mold is raised along with the hydraulic machine, and the clutch cover diaphragm spring assembly 36 riveted is returned to the material under the reaction force of the pre-pressing nitrogen spring 16, the pressing nitrogen spring 32 and the bending nitrogen spring 31, so that the clutch cover diaphragm spring assembly 36 is completed.

[0044] The mold of the embodiment uses three groups of different nitrogen springs and different limiting device heights, and the AMT clutch cover and diaphragm spring assembly riveting is completed by first bending and then riveting, thereby solving the problems of needing two sets of molds for the AMT clutch cover and diaphragm spring assembly riveting assembly, riveting twice and low production efficiency.

[0045] Obviously, the above embodiments are only examples for clearly illustrating the present application, and are not intended to limit the implementation of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art; here, all the embodiments do not need to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. An AMT clutch cover and diaphragm spring assembly riveting die, comprising a lower die plate (1), a lower base plate (2), a lower fixed plate (8), a lower rivet head (11), an intermediate limiting column (5), a cover positioning pin (10), a limiting column (35), a diaphragm positioning pin (7), an upper die plate (19), an upper base plate (20), an upper fixed plate (17), an upper rivet head (30), an upper rivet head base plate (29), a guide device (34); The lower die plate (1), the lower base plate (2), the lower fixed plate (8), the lower rivet head (11), the intermediate limiting column (5), the cover positioning pin (10), the limiting column (35), and the diaphragm positioning pin (7) are coaxially assembled; the cover positioning pin (10) and the diaphragm positioning pin (7) are assembled on the lower base plate (2) and require interference fit; the intermediate limiting column (5) is assembled on the center of the lower base plate (2) by a screw III (6); the lower base plate (2) is assembled on the lower die plate (1) by a screw II (4); the lower rivet head (11) is assembled on the lower fixed plate (8), and then the two are fixed on the lower base plate (2) by a screw I (3) and a cylindrical pin (9); Characterized in that: It further comprises a bending rivet head (33), an intermediate fixed ring (24), a pressing block (12), a pre-pressing nitrogen gas spring (16), a bending nitrogen gas spring (31), a pressing nitrogen gas spring (32), an intermediate pull rod (26), an intermediate pull rod washer (25), a pre-pressing plate (14), a pre-pressing block (13), a bending rivet head pull rod (21), and a bending pull rod washer (23); One end of the intermediate fixed ring (24) is embedded in the upper fixed plate (17) and is fixed on the upper fixed plate (17) by a screw VIII; The bending rivet head (33) is assembled on the outer ring of the intermediate fixed ring (24); the bending nitrogen gas spring (31) is assembled between the bending rivet head (33) and the upper base plate (20), and one end of the bending nitrogen gas spring (31) is embedded in the bending rivet head (33) and is fixed by a screw IX; the bending rivet head pull rod (21) passes through the bending rivet head (33), the upper base plate (20), the upper fixed plate (17), and the bending pull rod washer (23), and finally they are fixed by a screw VI (22); The pressing block (12) is assembled in the inner ring of the intermediate fixed ring (24) and is used to press the diaphragm spring in the diaphragm spring assembly downward to the upper end surface of the intermediate limiting column (5); the pressing nitrogen gas spring (32) is assembled between the pressing block (12) and the upper fixed plate (17), and one end of the pressing nitrogen gas spring (32) is embedded in the pressing block (12) and is fixed by a screw X; the intermediate pull rod (26) passes through the pressing block (12), the upper fixed plate (17), and the intermediate pull rod washer (25), and finally they are fixed by a screw XI; The pre-pressing plate (14) is assembled on the outer ring of the bending rivet head (33); the pre-pressing block (13) is assembled on the pre-pressing plate (14) and is used to press the disc spring in the diaphragm spring assembly; the pre-pressing nitrogen gas spring (16) is assembled between the pre-pressing plate (14) and the upper fixed plate (17), and one end of the pre-pressing nitrogen gas spring (16) is embedded in the upper fixed plate (17) and is fixed by a screw V; The upper die plate (19), the upper gasket (20), the upper fixed plate (17), the upper rivet head gasket (29), the upper rivet head (30), the bending rivet head (33), the intermediate fixed ring (24), the pressing block (12) and the pre-pressing plate (14) are coaxially assembled; The bottom outer edge of the bending rivet head (33) is provided with a conical inclined surface (33-1) with an α angle. The guide device (34) and the limiting column (35) are respectively installed on both sides between the lower die plate (1) and the upper die plate (19).

2. The AMT clutch cover and diaphragm spring assembly swage die of claim 1, wherein: The upper rivet head (30) is provided with an upper rivet head tongue (30-1), and the pre-pressing plate (14) is provided with a pre-pressing plate accommodation groove (14-1), and the upper rivet head tongue (30-1) is embedded in the pre-pressing plate accommodation groove (14-1).

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