Integrated fulcrum high-lever-ratio two-stage anti-overrun pull-type clutch

Abstract

The utility model discloses an integral fulcrum formula high lever ratio two stage anti -over -pull formula pull -type clutch, belongs to the field of clutch, including pressure plate cover, diaphragm spring, pressure plate and transmission piece, the pressure plate cover covers and installs on the pressure plate, and the outer circle between the outer circle of pressure plate cover is connected with a plurality of transmission pieces, and the inner wall of pressure plate cover is equipped with integral convex point fulcrum, and the pressure plate surface is equipped with pressure plate fulcrum, and diaphragm spring is placed between pressure plate and pressure plate cover, so that the diaphragm spring is always contacted on integral convex point fulcrum and pressure plate fulcrum, be equipped with one -level separation finger and two -level separation finger and form two stage separation finger on diaphragm spring, one -level separation finger is used to contact and cooperate the separation gasket of clutch, and the separation effect is realized through the separation gasket and promotes one -level separation finger, and two -level separation finger is used to contact separation gasket when over -push, realizes separation force softness and increases. The utility model increases the lever ratio of clutch, solves the problem of hybrid vehicle type space restraint and separation failure.

Description

Technical Field

[0001] This utility model relates to the field of clutches, specifically to an integrated fulcrum type high leverage ratio two-stage anti-over-push-pull clutch. Background Technology

[0002] Driven by the need for compact layouts in hybrid vehicles, pull clutches have become the preferred solution due to their high leverage ratio, but traditional structures still have significant bottlenecks. Existing products rely on a split support ring as the fulcrum of the diaphragm spring, which not only increases the axial thickness but also causes leverage ratio inaccuracies due to deformation of the fulcrum area under high pressure. Meanwhile, push clutches are limited by their inherent insufficient leverage ratio, making it difficult to meet the high torque requirements of small-sized applications.

[0003] Currently, pull clutches generally face three major challenges: First, the separate design of the independent support ring and pressure plate cover results in a bulky structure, making it difficult to break through the axial space limit; second, the single-angle design of the diaphragm spring causes a sharp decrease in clamping force when the separation stroke exceeds the limit, and the release bearing is frequently pushed and impacted, resulting in abnormal noises; third, the radial riveting method of the transmission plate is prone to connection failure due to centrifugal force, which restricts durability.

[0004] Although attempts have been made to improve compactness, such as thinning the support ring or reducing the radial dimension, the structural redundancy and over-push risk of the split fulcrum have not been completely eliminated. Therefore, there is an urgent need for an innovative pull clutch assembly that integrates a single fulcrum structure (eliminating the split support ring), high leverage ratio optimization (breaking through the limitations of push clutches), and a two-stage anti-over-push mechanism (segment angle or segment height control) to ensure high load reliability and separation safety while maximizing axial dimension compression. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide an integrated fulcrum type high leverage ratio dual-stage anti-push-pull clutch, which is suitable for pull clutch cover assemblies with small size and high torque requirements. Through structural innovation, the leverage ratio is increased by about 30% and the axial dimension is reduced by about 40%, which is especially suitable for the compact space layout of hybrid vehicles.

[0006] The purpose of this utility model is achieved through the following technical solution: This integrated fulcrum type high leverage ratio dual-stage anti-over-push-pull clutch includes a pressure plate cover, a diaphragm spring, a pressure plate, and transmission plates. The pressure plate cover is mounted on the pressure plate, and several transmission plates are connected between the outer circle of the pressure plate and the outer circle of the pressure plate cover. An integrated protruding fulcrum is provided on the inner wall of the pressure plate cover, and a pressure plate fulcrum is provided on the surface of the pressure plate. The diaphragm spring is placed between the pressure plate and the pressure plate cover, so that the diaphragm spring is in constant contact with the integrated protruding fulcrum and the pressure plate fulcrum. The diaphragm spring is provided with a primary separation finger and a secondary separation finger to form a dual-stage separation finger. The primary separation finger is used to contact the separation pad of the clutch, and the separation pad pushes the primary separation finger to achieve the separation effect. The secondary separation finger is used to contact the separation pad during over-push, thereby increasing the separation force more gently.

[0007] As a further technical solution, several pressure plate protrusions are evenly distributed along the circumference of the outer circle of the pressure plate, and the transmission plate is fixed to the pressure plate protrusions by pressure plate rivets.

[0008] As a further technical solution, the outer circumference of the pressure plate cover is evenly distributed with several transmission plate mounting holes, and the transmission plate mounting holes correspond one-to-one with the protruding ears of the pressure plate. The transmission plates are placed on the pressure plate cover and fixed to the transmission plate mounting holes by rivets.

[0009] As a further technical solution, the end of the transmission plate connected to the pressure plate is provided with a forming height H relative to the end connected to the pressure plate cover, which is used to increase the lifting force of the pressure plate when the clutch is disengaged.

[0010] The beneficial effects of this utility model are as follows: 1. The distance from the contact point of the clutch release plate and diaphragm spring to the integrated protrusion support point of the pressure plate cover is called the leverage ratio, i.e., the clutch leverage ratio is X / Y. Compared with the existing technology, this structural design increases the clutch leverage ratio, which can meet the requirements of small-specification high-torque clutches. At the same time, the simplification of parts greatly reduces manufacturing costs. The overall design largely solves the problems of space constraints and separation failure in hybrid vehicles. 2. Adding an integrated protruding support point to the pressure plate cover to replace the support ring of the conventional clutch can reduce the number of parts, simplify the assembly components, and reduce costs. 3. The diaphragm spring dual-stage separation finger structure can gently prevent over-push separation failure. When the separation pad is over-pushed, it will contact the secondary separation finger, and the separation force will increase instantly to prevent over-push by gently increasing the separation force. 4. The pressure plate adopts a protruding ear design to reduce the axial space occupied by the pressure plate, and at the same time, the transmission plate can be placed on the pressure plate cover to reduce the risk of transmission plate interference. 5. Using molded transmission plates with reverse riveting can increase the lifting force of the pressure plate when the clutch is disengaged, so as to achieve complete clutch disengagement. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 for Figure 1 PP sectional view.

[0013] Figure 3 for Figure 1 The M-axis rotated view.

[0014] Figure 4 This is a schematic diagram of the structure of the pressure plate in this utility model.

[0015] Figure 5 for Figure 4 A QQ cross-sectional view.

[0016] Figure 6 This is a schematic diagram of the structure of the pressure plate cover of this utility model.

[0017] Figure 7 for Figure 6 RR section view.

[0018] Figure 8 for Figure 7 A magnified view of a portion of region I.

[0019] Figure 9 This is a schematic diagram of the diaphragm spring in this utility model.

[0020] Figure 10 for Figure 9 SS sectional view.

[0021] Figure 11 This is a top view of the transmission plate in this utility model.

[0022] Figure 12 This is a schematic diagram of the main structure of the transmission plate in this utility model.

[0023] Figure 13 This is the separation characteristic curve of the clutch in the normal disengagement state in this utility model.

[0024] Figure 14 This is the separation characteristic curve of the clutch in the over-disengagement state in this utility model.

[0025] Explanation of reference numerals in the attached drawings: 1. Pressure plate cover; 2. Diaphragm spring; 3. Pressure plate; 4. Rivet; 5. Transmission plate; 6. Pressure plate rivet; 7. Integrated protruding support point; 8. First-stage separation finger; 9. Second-stage separation finger; 10. Pressure plate protruding ear; 11. Pressure plate support point; 12. Transmission plate mounting hole. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings: Example: As attached Figures 1-14 As shown, this integrated fulcrum type high leverage ratio dual-stage anti-push-pull clutch includes a pressure plate cover 1, a diaphragm spring 2, a pressure plate 3, a rivet 4, a transmission plate 5, a pressure plate rivet 6, an integrated protruding fulcrum 7, a first-stage separation finger 8, a second-stage separation finger 9, a pressure plate protruding ear 10, a pressure plate fulcrum 11, and a transmission plate mounting hole 12.

[0027] Reference Appendix Figure 1 , 2 The pressure plate cover 1 is installed on the pressure plate 3, such as... Figure 2 , 5 As shown in Figures 7 and 8, an integrated protruding support point 7 (which can serve as a fulcrum for the diaphragm spring 2) is provided on the inner wall of the pressure plate cover 1. A pressure plate support point 11 is provided on the surface of the pressure plate 3. The diaphragm spring 2 is placed between the pressure plate 3 and the pressure plate cover 1, so that the diaphragm spring 2 is constantly in contact with the integrated protruding support point 7 and the pressure plate support point 11. By adding the integrated protruding support point 7 on the pressure plate cover 1 to replace the support ring of the conventional clutch, the number of parts can be reduced, the assembly parts can be simplified, and the cost can be reduced.

[0028] like Figure 2 , 9 As shown in Figure 10, the diaphragm spring 2 is equipped with a primary separation finger 8 and a secondary separation finger 9, forming a double-stage separation mechanism to gently prevent over-push separation failure. The primary separation finger 8 contacts and engages with the clutch release plate. When the clutch needs to disengage, the release plate pushes the primary separation finger 8 to achieve the separation effect. The clutch's separation characteristic curve under normal disengagement conditions is shown in Figure 10. Figure 13 As shown. When the release plate is over-push, it will contact the secondary release finger 9. At this time, the release force will increase instantaneously to prevent over-push by gently increasing the release force. The release characteristic curve of the clutch in the over-push state is shown in the figure. Figure 14 As shown.

[0029] Reference Appendix Figure 6 , 7 The pressure plate cover 1 has three equally spaced transmission plate mounting holes 12, which are used to fix the transmission plate 5. The transmission plate 5 is connected between the outer circle of the pressure plate 3 and the outer circle of the pressure plate cover 1. Preferably, as shown in the figure... Figure 3 , 4As shown in Figure 5, three pressure plate protrusions 10 are evenly distributed along the circumference of the outer circle of the pressure plate 3 (corresponding to the number of transmission plate mounting holes 12). The transmission plate 5 is fixed to the pressure plate protrusions 10 by pressure plate rivets 6, and the transmission plate 5 is fixed to the transmission plate mounting holes 12 by rivets 4. The pressure plate protrusions 10, in conjunction with the transmission plate mounting holes 12 on the pressure plate cover 1, allow the transmission plate 5 to be placed on the pressure plate cover 1. The use of pressure plate protrusions 10 on the pressure plate 1 reduces the axial space occupied by the pressure plate, and at the same time, it allows the transmission plate 5 to be placed on the pressure plate cover 1, reducing the risk of interference to the transmission plate 5.

[0030] like Figure 11 , 12 As shown, the end of the transmission plate 5 connected to the pressure plate 3 has a forming height H relative to the end connected to the pressure plate cover 1, which can increase the lifting force of the pressure plate 3 when the clutch is disengaged. By using the formed transmission plate to be riveted in the opposite direction, the lifting force of the pressure plate 3 when the clutch is disengaged can be increased to achieve complete clutch disengagement.

[0031] Reference Appendix Figure 2 The ratio of the distance X from the contact point of the clutch release plate and diaphragm spring 2 to the integrated protrusion fulcrum 7 on the pressure plate cover to the distance Y from the pressure plate fulcrum 11 to the integrated protrusion fulcrum 7 is called the leverage ratio, i.e., the clutch leverage ratio is X / Y. Regardless of whether it's a pull-type or push-type clutch, this structural design increases the clutch leverage ratio, enabling the fulfillment of the clutch requirement for small-sized, high-torque components, while simultaneously simplifying parts and significantly reducing manufacturing costs. The overall design largely solves the space constraints and disengagement failure problems in hybrid vehicles. Figure 2 In the diagram, the contact diameter of the separation pad is D.

[0032] The working principle of this utility model: During normal operation, the clutch pressure plate 3 is constantly compressed against the friction plates of the driven plate by the rebound force of the diaphragm spring 2 on the pressure plate fulcrum 11, thereby transmitting the engine torque. When the clutch needs to disengage, the release plate moves towards the pressure plate cover 1, compressing the first-stage release finger 8 of the diaphragm spring 2. The pressure plate 3 is then separated from the friction plates of the driven plate by the pulling force of the transmission plate 5. The clutch disengagement characteristic curve under normal disengagement conditions is shown in the figure. Figure 13 As shown. When over-push occurs, the release pad continues to move towards the pressure plate cover 1, compressing to the secondary release finger 9. At this point, the separation force increases, and the release pad experiences increased force, slowing its movement or stopping it. This gently increases the separation force to prevent over-push, protecting the clutch and extending its lifespan. The clutch's separation characteristic curve under over-push conditions is shown in the figure. Figure 14 As shown.

[0033] Compared to existing technologies, this utility model is applicable to pull-type clutch cover assemblies with small size and high torque requirements. Through structural innovation, it achieves a lever ratio increase of about 30% and an axial dimension reduction of about 40%, making it particularly suitable for compact space layouts in hybrid vehicles.

[0034] It is understood that, for those skilled in the art, any equivalent substitutions or modifications to the technical solutions and inventive concepts of this utility model should fall within the protection scope of the appended claims.

Claims

1. A one-piece fulcrum type high leverage ratio two-stage anti-push-pull clutch, characterized in that: The device includes a pressure plate cover (1), a diaphragm spring (2), a pressure plate (3), and transmission plates (5). The pressure plate cover (1) is mounted on the pressure plate (3). Several transmission plates (5) are connected between the outer circle of the pressure plate (3) and the outer circle of the pressure plate cover (1). An integral protrusion support (7) is provided on the inner wall of the pressure plate cover (1). A pressure plate support (11) is provided on the surface of the pressure plate (3). The diaphragm spring (2) is placed between the pressure plate (3) and the pressure plate cover (1), so that the diaphragm spring (2) is in constant contact with the integral protrusion support (7) and the pressure plate support (11). The diaphragm spring (2) is provided with a first-stage separation finger (8) and a second-stage separation finger (9) to form a double-stage separation finger. The first-stage separation finger (8) is used to contact the separation pad of the clutch. The separation pad pushes the first-stage separation finger (8) to achieve the separation effect. The second-stage separation finger (9) is used to contact the separation pad when over-push, so as to achieve a soft increase in separation force.

2. The integrated fulcrum type high leverage ratio two-stage anti-push-pull clutch according to claim 1, characterized in that: The pressure plate (3) has several pressure plate protrusions (10) evenly distributed along the circumference of its outer circle. The transmission plate (5) is fixed to the pressure plate protrusions (10) by pressure plate rivets (6).

3. The integrated fulcrum type high leverage ratio two-stage anti-push-pull clutch according to claim 2, characterized in that: The outer circumference of the pressure plate cover (1) is evenly distributed with a number of transmission plate mounting holes (12), and the transmission plate mounting holes (12) correspond one-to-one with the pressure plate protrusion (10). The transmission plate (5) is placed on the pressure plate cover (1) and fixed to the transmission plate mounting holes (12) by rivets (4).

4. The integrated fulcrum type high leverage ratio two-stage anti-push-pull clutch according to claim 1, characterized in that: The transmission plate (5) has a forming height H at one end connected to the pressure plate (3) and the other end connected to the pressure plate cover (1), which is used to increase the lifting force of the pressure plate (3) when the clutch is disengaged.

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