Clutch shock absorber cover assembly

Abstract

The present invention discloses a clutch shock-absorbing cover assembly, a large-angle shock-absorbing pressure plate is added to the clutch cover assembly, the large-angle shock-absorbing pressure plate comprises a main pressure plate and a secondary pressure plate, the main pressure plate comprises a large-angle shock-absorbing component and a secondary pressure plate connecting assembly, the secondary pressure plate is connected to the secondary pressure plate connecting assembly, the main pressure plate is riveted to the transmission belt through a three-piece connection, the secondary pressure plate is flexibly combined with the driven plate, the diaphragm spring transmits the clamping force through the supporting mountain of the main pressure plate, and then transmits the clamping force through the secondary pressure plate connecting assembly, exerts pressure on the friction plate on the driven plate, and drives the driven plate to rotate. The advantages of the present invention are that by changing the structure of the traditional pressure plate, the pressure plate is given a shock-absorbing function, the shock-absorbing property of the transmission system is effectively enhanced, and the sliding friction work is reduced.

Description

Technical Field

[0001] The invention relates to the field of core parts of an automobile clutch, and in particular to a clutch shock-absorbing cover assembly. Background Art

[0002] The clutch is a key component that connects the engine and the gearbox in the car, and plays the role of clutch torque. The pressure plate is the core part of the clutch. The diaphragm spring contacts and deforms with the support mountain on the pressure plate to provide the clamping force. The large cross-section of the pressure plate evenly applies the clamping force to the friction plate of the driven plate. The traditional clutch pressure plate rotates with the cover assembly. At the moment of engagement, the pressure plate and the friction plate generate friction torque, and the pull on the transmission belt is step-like. Due to the large speed difference, there is relative slippage, resulting in high heat generation. The pressure plate is a huge cast iron part, generally made of gray iron. It is riveted to the part cover through the transmission belt, and it rotates with the flywheel during engine operation.

[0003] The transmission belt will be subjected to a large impact during the clutch process. This is because during the engagement process, the pressure plate and the friction plate contact to generate torque, which will stretch the transmission belt. When fully engaged, due to the fluctuation of the engine speed, reverse torque will appear, thereby compressing the transmission belt. Especially with the continuous improvement of environmental protection requirements, engines are gradually developing in the direction of small displacement, such as three-cylinder engines, cylinder deactivation and other technologies. Although these technologies help improve fuel economy, they increase the instability and vibration of the speed, which is also a huge challenge for the clutch transmission belt.

[0004] In addition, the friction work is considered at the beginning of the clutch design. The friction work is the heat generated by the friction between the pressure plate and the friction plate during the engagement process. There is a key parameter, the friction time. The longer the friction time, the greater the heat generated. In order to ensure that the temperature of the clutch is not too high during operation, the mass of the pressure plate is generally increased to absorb and release the friction heat. As a result, the size of the pressure plate is large on some high-power power platforms.

[0005] In the traditional power transmission process, the damping mechanism is only arranged on the flywheel and the clutch driven plate, such as Figure 1 shown.

[0006] The above are the areas that need to be improved in this application. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a clutch damping cover assembly to improve the damping effect of the engine transmission system, protect the clutch transmission belt, and reduce sliding friction work.

[0008] In order to solve the above technical problems, the present invention provides a clutch shock absorber cover assembly, a large-angle shock-absorbing pressure plate is added to the clutch cover assembly, the large-angle shock-absorbing pressure plate includes a main pressure plate and a secondary pressure plate, the main pressure plate includes a large-angle shock-absorbing component and a secondary pressure plate connecting assembly, the secondary pressure plate is connected to the secondary pressure plate connecting assembly, the main pressure plate is riveted to the transmission belt through three-way joints, the secondary pressure plate is flexibly combined with the driven plate, the diaphragm spring transmits the clamping force through the supporting mountain of the main pressure plate, and then transmits the clamping force through the secondary pressure plate connecting assembly, exerts pressure on the friction plate on the driven plate, and drives the driven plate to rotate.

[0009] The large-angle shock-absorbing component is distributed in the inner cavity of the main pressure plate, including a single-section elastic component, or multiple-section elastic components, and damping sliders at both ends of each elastic component. One end of the large-angle shock-absorbing component is in contact with the secondary pressure plate connecting assembly, and the other end is in contact with the outer shell of the main pressure plate. When there is a speed difference between the secondary pressure plate and the main pressure plate, the large-angle shock-absorbing component starts the shock-absorbing function.

[0010] The secondary pressure plate refers to a driven plate force surface that contacts the friction surface of the driven plate, the maximum outer diameter of the driven plate force surface is 1-2mm larger than the maximum outer diameter of the driven plate friction plate, and the inner diameter is 1-2mm smaller than the inner diameter of the driven plate friction plate. The secondary pressure plate is also provided with rivet holes for riveting to the force transmission plate, and the rivet holes are evenly distributed on the inner circle of the secondary pressure plate.

[0011] The secondary pressure plate connection assembly includes a force transfer plate, rivets, butterfly springs, Z-shaped rings and rollers. The force transfer plate is used to transfer torque and clamping force, and only moves between two surfaces at a certain distance perpendicular to the transmission shaft. The force transfer plate is riveted to the secondary pressure plate by rivets, the force-bearing surface of the damping slider of the force transfer plate contacts the damping slider in the large-angle shock-absorbing component, and the thrust bearing support surface of the force transfer plate contacts the roller. One end of the butterfly spring contacts the Z-shaped ring, and the other end contacts the force transfer plate, which plays a role in supporting the force transfer plate. One end of the Z-shaped ring contacts the main pressure plate cover, and the other end contacts the butterfly spring, which plays a role in limiting the position of the butterfly spring.

[0012] The superior effects of the present invention are:

[0013] 1) The present invention changes the structure of the traditional pressure plate, divides the pressure plate into a main pressure plate and a secondary pressure plate, and gives the pressure plate a shock-absorbing function, so that the shock-absorbing mechanism of the transmission system has more layout options, and effectively enhances the shock-absorbing performance of the transmission system;

[0014] 2) It can replace the dual-mass flywheel and reduce vehicle manufacturing costs;

[0015] 3) It plays a role in protecting the transmission belt;

[0016] 4) The pressure plate of the present invention can be flexibly combined with the driven plate, and the force applied to the transmission belt is parabolic. The secondary pressure plate is quickly combined with the driven plate, which shortens the combination time and thus reduces the sliding friction work. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 It is a schematic diagram of the layout of the shock absorbing mechanism of the traditional power system;

[0019] Figure 2 It is a structural schematic diagram of the clutch shock absorbing cover assembly of the present invention;

[0020] Figure 3a and Figure 3b This is a schematic diagram of the main pressure plate housing of the present invention;

[0021] Figure 4a and Figure 4b It is a schematic diagram of the secondary pressure plate of the present invention;

[0022] Figure 5a and Figure 5b It is a schematic diagram of the force transmission plate of the present invention;

[0023] Figure 6 It is a schematic diagram of the arrangement of the shock absorbing mechanism of the power system of the present invention;

[0024] Description of the numbers in the figure:

[0025] 1—Main pressure plate outer shell;

[0026] 101—Supporting mountain; 102—Three-pole;

[0027] 103—thrust bearing support surface;

[0028] 2—force transmission plate;

[0029] 201—Thrust bearing support surface; 202—Damping slider force surface

[0030] 3—Main pressure plate cover; 4—Z-shaped ring;

[0031] 5—disc spring; 6—rivet;

[0032] 7—roller; 8—shock-absorbing spring;

[0033] 9—Secondary pressure plate;

[0034] 901—Rivet hole 902—Force bearing surface of driven plate. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0036] Figure 2 FIG. 2 shows a schematic structural diagram of a clutch damping cover assembly according to an embodiment of the present invention. Figure 2-Figure 6 As shown, the present invention provides a clutch shock-absorbing cover assembly, and a large-angle shock-absorbing pressure plate is added to the clutch cover assembly, and the large-angle shock-absorbing pressure plate includes a main pressure plate and a secondary pressure plate 9, the main pressure plate includes a large-angle shock-absorbing component and a secondary pressure plate connecting assembly, the secondary pressure plate 9 is connected to the secondary pressure plate connecting assembly, the main pressure plate is riveted to the transmission belt through a three-piece 102, the secondary pressure plate 9 is flexibly combined with the driven plate, the disc spring 5 transmits the clamping force through the supporting mountain 101 of the main pressure plate, and then transmits the clamping force through the secondary pressure plate connecting assembly, exerts pressure on the friction plate on the driven plate, and drives the driven plate to rotate.

[0037] The large-angle shock absorbing component is distributed in the inner cavity of the main pressure plate, including a single-section elastic component, or multiple-section elastic components, and damping sliders at both ends of each elastic component. In this embodiment, the large-angle shock absorbing component is a single long spring. One end of the shock absorbing spring 8 is in contact with the secondary pressure plate connecting assembly, and the other end is in contact with the main pressure plate outer shell 1. When there is a speed difference between the secondary pressure plate 9 and the main pressure plate, the force transmission plate 2 is subjected to the force of the damping slider in the main pressure plate, and / or the force of the force transmission plate 2 is applied to the damping slider in the main pressure plate, so that the large-angle shock absorbing spring 8 starts to work.

[0038] The secondary pressure plate 9 has a driven plate force surface 902 in contact with the driven plate friction surface, the maximum outer diameter of the driven plate force surface 902 is 1-2 mm larger than the maximum outer diameter of the driven plate friction plate, and the inner diameter is 1-2 mm smaller than the inner diameter of the driven plate friction plate. The secondary pressure plate 9 is also provided with rivet holes 901 riveted to the force transmission plate 2, and the rivet holes 901 are evenly distributed on the inner circle of the secondary pressure plate 9.

[0039] The secondary pressure plate connection assembly includes a force transmission plate 2, a rivet 6, a butterfly spring 5, a Z-shaped ring 4 and a roller 7. The force transmission plate 2 only moves between two surfaces at a certain distance perpendicular to the transmission shaft. The force transmission plate is used to transmit torque and clamping force, wherein the clamping force transmission is realized by a limit device or a thrust bearing mechanism. In this embodiment, a thrust self-aligning bearing is selected, wherein 201 is equivalent to the inner ring of the thrust bearing, and 103 is equivalent to the outer ring of the thrust bearing. The force transmission plate 2 is riveted together with the secondary pressure plate 9 by rivets 6, and the force bearing surface 202 of the damping slider of the force transmission plate 2 contacts the damping slider in the large-angle shock-absorbing component, and the thrust bearing support surface of the force transmission plate 2 contacts the roller 7. One end of the butterfly spring 5 contacts the Z-shaped ring 4, and the other end contacts the force transmission plate 2, which plays a role in supporting the force transmission plate 2. One end of the Z-shaped ring 4 contacts the main pressure plate cover plate 3, and the other end contacts the butterfly spring 5, which plays a role in limiting the position of the butterfly spring 5.

[0040] During the engagement process of the clutch shock-absorbing cover assembly of the present invention, the butterfly spring 5 applies pressure to the main pressure plate, and the pressure is then applied to the force transmission plate 2 through the roller 7, so that the force surface 902 of the secondary pressure plate driven plate is pressed against the driven plate friction plate. Compared with the traditional pressure plate, the clutch cover assembly of the present invention adds a large-angle shock-absorbing component, so the engagement process is flexible, which reduces the sliding friction time and thus reduces the sliding friction work. At the same time, the force change of the transmission belt is also smoother, which protects the transmission belt. The large-angle shock-absorbing component located in the inner cavity of the main pressure plate and the shock-absorbing spring 8 utilize the inner cavity space to arrange a single-section shock-absorbing spring or a multi-section shock-absorbing spring, thereby improving the shock-absorbing effect.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A clutch damping cover assembly, characterized in that: The clutch cover assembly includes a large-angle shock-absorbing pressure plate, which includes a main pressure plate and a secondary pressure plate, the main pressure plate includes a large-angle shock-absorbing component and a secondary pressure plate connecting assembly, the secondary pressure plate is connected to the secondary pressure plate connecting assembly, the main pressure plate is riveted to the transmission belt, the secondary pressure plate is flexibly combined with the driven plate, the diaphragm spring transmits the clamping force through the supporting mountain of the main pressure plate, and then transmits the clamping force through the secondary pressure plate connecting assembly, exerts pressure on the friction plate on the driven plate, and drives the driven plate to rotate; The large-angle shock-absorbing component is distributed in the inner cavity of the main pressure plate, including a single-section elastic component or a multi-section elastic component, and damping sliders at both ends of each section of the elastic component; one end of the large-angle shock-absorbing component is in contact with the secondary pressure plate connecting assembly, and the other end is in contact with the outer shell of the main pressure plate. When there is a speed difference between the secondary pressure plate and the main pressure plate, the large-angle shock-absorbing component starts the shock-absorbing function; The secondary pressure plate connection assembly includes a force transmission plate for transmitting torque, a diaphragm spring and a roller, and the force transmission plate moves only between two surfaces perpendicular to the transmission shaft at a certain distance.

2. The clutch damping cover assembly according to claim 1 is characterized in that: The secondary pressure plate refers to a driven plate force surface that contacts the driven plate friction surface. The maximum outer diameter of the driven plate force surface is 1-2mm larger than the maximum outer diameter of the driven plate friction plate, and the inner diameter is 1-2mm smaller than the inner diameter of the driven plate friction plate.

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