Driving-piece-free clutch with controllable lift force

Abstract

The utility model discloses a transmission-sheet-free clutch with controllable lift force, which relates to the field of automobile clutches and comprises a pressure plate, a clutch cover and the like, a diaphragm spring is coaxially limited on the clutch cover through a stamping groove of the clutch cover and a special-shaped supporting nail by pressing rivets, and the pressure plate is limited on the clutch cover through a plug screw. A pressure spring is arranged between the plug screw and the pressure plate to control the lift force of the pressure plate, and an elastic washer is arranged between the plug screw and the clutch cover to achieve the functions of vibration reduction of the pressure plate and pre-tightening of the plug screw. Under the action of different pressing forces of the diaphragm spring and different types of clutch pressure plates with different masses, the lifting force of the pressure plate can be more accurately provided, and the lifting range can be more controlled so as to achieve the combination and separation accuracy and the service life of the clutch. According to the structure, transmission pieces, rivets and other parts are reduced, and the structure is simpler; and meanwhile, two riveting technological processes are reduced, the labor cost is lower, and the manufacturing cost is lower.

Description

Technical Field

[0001] The utility model relates to the field of automobile clutches, in particular to a clutch with controllable lift force without a transmission plate. Background Art

[0002] The clutch is a mechanical device used to control and adjust the output of transmission power. It connects or separates two shafts so that the drive shaft and the driven shaft can rotate independently or synchronously. Since the clutch plays multiple functions in the transmission system, such as torque transmission, power cut-off, vibration reduction and overload protection, the smoothness of the clutch separation and combination affects the operation of the whole machine, and the lift of the pressure plate plays a decisive role. At the same time, the clutch is widely used in various mechanical equipment, such as automobiles, motorcycles, industrial machinery, etc. It is one of the indispensable components of mechanical equipment and has a strong market demand. To this end, manufacturers need to reduce costs and increase efficiency, and gain a larger market share with lower costs, better designs, and more advanced processes.

[0003] There are currently two types of clutches, one is a spiral clutch and the other is a diaphragm clutch. The spiral clutch is generally used in vehicles with a two-way transmission system. The diaphragm clutch is a traditional conventional clutch and is more common in the market. The traditional conventional clutch is generally composed of a clutch cover, a support ring or support ring, a support pin, a diaphragm spring, a transmission plate, a pressure plate, rivets, etc., and is generally divided into three processes for final assembly. First, the riveting die presses the clutch cover, diaphragm spring and support ring into an assembly under the action of a hydraulic press; secondly, the riveting die rivets the pressure plate cover assembly and the transmission plate into an assembly under the action of a hydraulic press; finally, the riveting die rivets the pressure plate cover assembly and the pressure plate into an assembly under the action of a hydraulic press. This type of clutch assembly has many product parts and many final assembly processes, which makes the manufacturing material cost and labor cost high and the efficiency low.

[0004] At the same time, the traditional conventional clutch generally uses the transmission plate to connect the clutch cover and the pressure plate with a riveting process, and the transmission plate also plays the role of lifting the pressure plate. When the clutch is disengaged, the release bearing pushes the diaphragm spring to move toward the pressure plate surface. The force changes the forming angle of the diaphragm spring through the lever principle, and the pressing force of the diaphragm spring on the pressure plate is reduced. The transmission plate lifts the pressure plate, and the clutch reaches the disengaged state. Since the clutch separation and engagement must be accurate and thorough, when the force of the transmission plate to lift the pressure plate is not enough, it is generally adopted to increase the number of a set of transmission plates or a set of elastic hooks to increase the lift force. However, this method can only increase the lift force exponentially, and cannot accurately control the lift force. It is easy to cause the lift force to be excessive, thereby inhibiting the function of the components, resulting in waste and increased costs. In addition, when riveting the transmission plate, there may be one more or one less piece, causing the performance of the assembly to deviate and cause the product to be scrapped, increasing the manufacturing cost. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the prior art and to provide a clutch with controllable lift force without a transmission plate. This structure removes the transmission plate and adds a pressure spring, thereby reducing the manufacturing cost of each component and simplifying the process. At the same time, it can more accurately provide the lift force of the pressure plate when the clutch is separated and engaged, thereby controlling the lift of the pressure plate and achieving precise separation.

[0006] The purpose of the utility model is achieved through the following technical solutions: A clutch with controllable lift force without transmission plate, comprising a clutch cover, a diaphragm spring, an elastic washer, a plug screw, a pressure plate and a pressure spring, wherein the diaphragm spring is limited on the clutch cover by riveting, a group of concentric holes are provided on the pressure plate for fixing and adjusting the lift, the pressure plate is installed in the concentric holes by plug screws and limited on the clutch cover, a pressure spring is provided between the plug screw and the pressure plate for controlling the lift force of the pressure plate, and an elastic washer is provided between the pressure plate and the clutch cover to achieve the effect of pressure plate vibration reduction and plug screw pre-tightening.

[0007] As a further technical solution, the diaphragm spring is positioned on the clutch cover by means of a clutch cover stamping groove and a special-shaped supporting pin through riveting, and the clutch cover is provided with a supporting pin fixing hole that cooperates with the special-shaped supporting pin.

[0008] As a further technical solution, the pressure plate has three ears evenly distributed around the circumference, and a group of concentric holes are provided in the ears; the clutch cover is provided with a limiting forming groove matching with the ears, and the bottom of the limiting forming groove is provided with a threaded hole matching with the plug screw.

[0009] As a further technical solution, the concentric holes include a small-diameter clearance hole and a pressure plate lift clearance hole, and the plug screw passes through the pressure plate lift clearance hole, the small-diameter clearance hole and the threaded hole for connection; the pressure spring is mounted on the plug screw, one end of the pressure spring abuts against the bottom wall of the pressure plate lift clearance hole, and the other end of the pressure spring abuts against the screw head of the plug screw, the diameter of the screw head matches the clearance of the pressure plate lift clearance hole, and the outer side of the pressure plate lift clearance hole has a 45° chamfer for self-positioning assembly of the plug screw.

[0010] As a further technical solution, the pressure spring adopts a design with both ends pressed together, and the spiral direction adopts a left-handed method. The stiffness and total height of the pressure spring are controlled by fixed values ​​for precise control of the lift force and lift.

[0011] As a further technical solution, the elastic gasket is mounted on the plug screw and placed between the pressure plate and the clutch cover, is in a constant force state, and isolates the clutch cover from direct contact with the pressure plate.

[0012] The beneficial effects of the utility model are:

[0013] 1. The structure and components of the clutch assembly are simplified, the number of transmission plates and rivets is reduced, and the difficulty and cost of assembly are reduced.

[0014] 2. The assembly of conventional clutches requires three riveting processes: riveting of the clutch cover and diaphragm spring, riveting of the transmission plate and pressure plate, and riveting of the clutch cover and transmission plate in the final assembly. Now only one riveting process is required: riveting of the clutch cover and diaphragm spring. This solution reduces the difficulty of assembly and shortens the assembly time, which can greatly improve production efficiency and save labor costs.

[0015] 3. By changing the stiffness of the pressure spring and the diameter and height of the concentric hole of the pressure plate, the lift force and lift of the clutch assembly on the pressure plate can be accurately controlled, thus achieving the effect of precise clutch separation.

[0016] 4. Changing the force-bearing space size of the clutch cover can strengthen the strength of the clutch, making it less likely to deform and more durable.

[0017] 5. The ear size of the pressure plate is optimized, which can reduce the cost of blank casting and increase versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a top view of the structure of the utility model.

[0019] Figure 2 for Figure 1 PP cross-sectional view (working state of the clutch).

[0020] Figure 3 for Figure 2 A partial enlarged schematic diagram of area A in the middle.

[0021] Figure 4 for Figure 1 PP cross-sectional view (clutch free state).

[0022] Figure 5 for Figure 4 A partial enlarged schematic diagram of area B in the middle.

[0023] Figure 6 It is a three-dimensional structural schematic diagram of the utility model.

[0024] Figure 7 It is a three-dimensional structural schematic diagram of the clutch cover in the utility model.

[0025] Figure 8 It is a three-dimensional structural schematic diagram of the middle pressure plate of the utility model.

[0026] Fig. 9 It is the load characteristic curve and separation characteristic curve of the clutch.

[0027] Explanation of the reference numerals in the accompanying drawings: clutch cover 1, diaphragm spring 2, special-shaped supporting pin 3, elastic washer 4, plug screw 5, pressure plate 6, pressure spring 7, ear 8, concentric hole 9, threaded hole 10, screw head 11, pressure plate lift clearance hole 12, limiting forming groove 13, clutch cover stamping groove 14, supporting pin fixing hole 15. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0029] like Figure 1-Figure 9 As shown in FIG. 1 , a clutch with controllable lift force without a transmission plate comprises a clutch cover 1, a diaphragm spring 2, an elastic washer 4, a plug screw 5, a pressure plate 6 and a pressure spring 7. Figure 2 , 7 The diaphragm spring 2 is positioned on the clutch cover 1 by means of a clutch cover stamping groove 14 and a special-shaped support pin 3 through riveting. The clutch cover 1 is provided with a support pin fixing hole 15 that cooperates with the special-shaped support pin 3.

[0030] A pressure spring 7 is provided between the plug screw 5 and the pressure plate 6 to control the lift force of the pressure plate 6. The pressure spring 7 is designed with two ends pressed together, the spiral direction is left-handed, and the material is VDCrSi and shot peened. The stiffness and total height of the pressure spring 7 are controlled by fixed values ​​for precise control of the lift force and lift, and the stiffness of the pressure spring can be changed with changes in the demand for lift force.

[0031] An elastic washer 4 is provided between the pressure plate 6 and the clutch cover 1 to achieve the effect of pressure plate vibration reduction and plug screw pre-tightening. The elastic washer 4 is sleeved on the plug screw 5 and placed between the pressure plate 6 and the clutch cover 1, is in a constant force state, and isolates the clutch cover 1 from direct contact with the pressure plate 6.

[0032] like Figure 6 , 7 As shown in Figures 1 and 8, the pressure plate 6 has three ears 8 evenly distributed around the circumference, and the ears 8 have a group of concentric holes 9 for fixing and adjusting the lift; the clutch cover 1 is provided with a limit forming groove 13 for avoiding and limiting the ears 8, and the limit forming groove 13 constitutes a controlled forming space at the limit position to enhance the anti-deformation ability of the clutch cover 1. The bottom center of the limit forming groove 13 is provided with a threaded hole 10 that cooperates with the plug screw 5. The pressure plate 6 is installed in the concentric hole 9 through the plug screw 5 and is limited on the clutch cover 1. When the plug screw is fastened to the clutch cover, the matching position of the plug screw end is lower than the total height of the clutch cover.

[0033] like Figure 3 , Figure 5As shown, the concentric hole 9 includes a small-diameter clearance hole and a pressure plate lift clearance hole 12, the plug screw 5 passes through the pressure plate lift clearance hole 12, the small-diameter clearance hole is matched and connected with the threaded hole 10; the pressure spring 7 is mounted on the plug screw 5, one end of the pressure spring 7 abuts against the bottom wall of the pressure plate lift clearance hole 12, the other end of the pressure spring 7 abuts against the screw head 11 of the plug screw 5, the diameter of the screw head 11 is matched with the clearance of the pressure plate lift clearance hole 12, and the outer side of the pressure plate lift clearance hole 12 has a 45° chamfer for self-positioning assembly of the plug screw 5.

[0034] The working process of this utility model: refer to the attached Fig. 9 Through actual testing, the load characteristic curve, separation characteristic curve, and pressure plate lift curve of the utility model are obtained. With the adjustment of the stiffness of the pressure spring and the thickness and diameter of the concentric holes of the pressure plate ears, the optimal lift force required by the product can be achieved, thereby obtaining the final required pressure plate lift, thereby achieving the effect of precise clutch separation.

[0035] Experiments have proved that the clutch with controllable lift force without transmission plate provided by the utility model can accurately control the lift force and lift required by the pressure plate in the separation state to achieve separation for clutches with different working points and pressure plates of different models, and at the same time provide a better way to design and control the lift of the pressure plate. This design increases the lift controllable method while ensuring the performance of the product, simplifies the types of parts, optimizes the production process, and reduces the production cost. At the same time, this technical solution fills the gap in the industry and has broad market prospects.

[0036] It is understandable that, for those skilled in the art, any equivalent replacement or change to the technical solution and the concept of the utility model should fall within the protection scope of the claims attached to the utility model.

Claims

1. A clutch with controllable lift force without a transmission plate, characterized in that: The invention comprises a clutch cover (1), a diaphragm spring (2), an elastic washer (4), a plug screw (5), a pressure plate (6) and a pressure spring (7); the diaphragm spring (2) is limited on the clutch cover (1) by riveting; the pressure plate (6) is provided with a group of concentric holes (9) for fixing and adjusting the lift; the pressure plate (6) is installed in the concentric holes (9) by the plug screw (5) and limited on the clutch cover (1); a pressure spring (7) is provided between the plug screw (5) and the pressure plate (6) for controlling the lift force of the pressure plate (6); an elastic washer (4) is provided between the pressure plate (6) and the clutch cover (1) to achieve the effect of reducing the vibration of the pressure plate and pre-tightening the plug screw.

2. The clutch with controllable lift force without transmission plate according to claim 1, characterized in that: The diaphragm spring (2) is positioned on the clutch cover (1) by means of a clutch cover stamping groove (14) and a special-shaped support pin (3) through riveting, and the clutch cover (1) is provided with a support pin fixing hole (15) that matches the special-shaped support pin (3).

3. The clutch with controllable lift force without transmission plate according to claim 2, characterized in that: The pressure plate (6) has three ears (8) evenly distributed around the circumference, and a group of concentric holes (9) are arranged in the ears (8); the clutch cover (1) is provided with a limiting forming groove (13) matching with the ears (8), and the bottom of the limiting forming groove (13) is provided with a threaded hole (10) matching with the plug screw (5).

4. The clutch with controllable lift force without transmission plate according to claim 3, characterized in that: The concentric hole (9) includes a small-diameter clearance hole and a pressure plate lift clearance hole (12); the plug screw (5) passes through the pressure plate lift clearance hole (12), and the small-diameter clearance hole is matched with the threaded hole (10); the pressure spring (7) is mounted on the plug screw (5), one end of the pressure spring (7) abuts against the bottom wall of the pressure plate lift clearance hole (12), and the other end of the pressure spring (7) abuts against the screw head (11) of the plug screw (5), the diameter of the screw head (11) is matched with the clearance of the pressure plate lift clearance hole (12), and the outer side of the pressure plate lift clearance hole (12) has a 45° chamfer for self-positioning assembly of the plug screw (5).

5. The clutch with controllable lift force without transmission plate according to claim 4, characterized in that: The pressure spring (7) is designed with two ends pressed together, and the spiral direction is left-handed. The stiffness and total height of the pressure spring (7) are controlled by fixed values ​​for precise control of the lift force and lift.

6. The clutch with controllable lift force without transmission plate according to claim 5, characterized in that: The elastic gasket (4) is sleeved on the plug screw (5) and placed between the pressure plate (6) and the clutch cover (1), is in a constant force state, and isolates the clutch cover (1) from direct contact with the pressure plate (6).

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