Clutch pressing plate structure with limiting elastic element and limiting ball

Abstract

The clutch pressing plate structure comprises a pressing plate, a plurality of installation holes are formed in the side edge of the pressing plate, the limiting elastic elements are arranged at the bottoms of the installation holes, the limiting balls are arranged at the tops of the limiting elastic elements, and the limiting balls are located in the installation holes. The pressing plate is installed in a hub body of the clutch, and a unilateral gap between the inner diameter of the hub body and the outer diameter of the pressing plate is smaller than the diameter of the limiting ball. According to the clutch pressing plate structure, an existing clutch pressing plate structure is improved, the pressing plate is fixed through the limiting elastic element and the limiting ball and prevented from freely moving, and therefore in the clutch combining and disengaging process, impact force generated by reciprocating motion of a friction pair is transmitted to the pressing plate with the large contact area and then to the check ring; therefore, the pressure and impact of the axial force of the friction pair on the annular surface of the retainer ring are greatly reduced, and the deformation and falling probability of the retainer ring is reduced; meanwhile, due to the fact that the pressing plate is fixed, friction between the pressing plate and the hub body is reduced, the gear shifting abnormal sound probability is reduced, and the service life of the hub body is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of clutches, in particular to a clutch pressure plate structure with a limiting elastic element and a limiting ball. Background Art

[0002] The clutch is an important component for transmitting power in the gearbox of engineering machinery. It is usually composed of a hub, shaft, gear, piston, friction pair, pressure plate, retaining ring and return spring. When the pressure oil pushes the piston to move axially, the friction pair and pressure plate between the piston and the retaining ring are pressed tightly, and the gear and the hub body rotate as a whole through the internal and external splines to transmit the output power; when there is no pressure oil, the friction pair and pressure plate between the piston and the retaining ring are loosened, and the gear and the hub body are separated from each other and cannot transmit power. The existing clutch structure often allows the pressure plate and the friction plate to move axially together to the retaining ring limit position. During the above-mentioned clutch engagement and disengagement process, the retaining ring located in the hub body groove is impacted by the reciprocating motion of the friction plate and the pressure plate. Due to the small contact area between the retaining ring and the hub body groove and the strong impact pressure, it is easy to cause the retaining ring to detach from the hub body groove after a long time, thereby causing problems such as clutch decompression or even inability to work. At the same time, since the pressure plate and the friction pair reciprocate together, the outer diameter of the pressure plate will produce friction with the inner diameter of the hub body, thereby producing abnormal noise and reducing the life of the hub body.

[0003] Therefore, it is necessary to develop a new clutch pressure plate structure to reduce the friction between the pressure plate and the hub, reduce the probability of abnormal noise during gear shifting, and extend the life of the hub. Utility Model Content

[0004] Purpose of the utility model: In view of the shortcomings and defects of the prior art, the utility model provides a clutch pressure plate structure with a limiting elastic element and a limiting ball, and improves the existing clutch pressure plate structure. The limiting elastic element and the limiting ball are used to fix the pressure plate and prevent the pressure plate from moving freely, so that during the engagement and disengagement of the clutch, the impact force of the reciprocating motion of the friction pair is first transmitted to the pressure plate with a large contact area and then to the retaining ring, thereby greatly reducing the pressure and impact of the axial force of the friction pair on the annular surface of the retaining ring, and reducing the deformation and falling probability of the retaining ring; at the same time, since the pressure plate is fixed, the friction between the pressure plate and the hub body is reduced, the probability of abnormal noise during gear shifting is reduced, and the life of the hub body is extended.

[0005] Technical solution: The utility model is a clutch pressure plate structure with a limiting elastic element and a limiting ball, which is characterized by: comprising a pressure plate, a plurality of mounting holes are opened on the side of the pressure plate, a limiting elastic element is arranged at the bottom of the mounting hole, a limiting ball is arranged on the top of the limiting elastic element, and the limiting ball is located in the mounting hole; the pressure plate is installed in the hub body of the clutch, and the single-sided gap between the inner diameter of the hub body and the outer diameter of the pressure plate is smaller than the diameter of the limiting ball.

[0006] Wherein, a piston, a friction pair and a gear are coaxially arranged in sequence in the hub body.

[0007] Among them, the pressing plate is located inside the hub body and on the inner side of the retaining ring installation position.

[0008] Among them, the retaining ring is located in the retaining ring groove of the hub body.

[0009] Among them, the limiting elastic element is a limiting spring.

[0010] Among them, the limiting ball is a limiting steel ball.

[0011] Among them, the mounting holes are evenly arranged at equal distances on the side of the pressing plate.

[0012] Beneficial effects: Compared with the prior art, the present utility model has the following remarkable advantages: Under the action of the centrifugal force of the limiting ball and the preloaded limiting elastic element, the pressing plate of the present utility model is axially fixed, greatly reducing the pressure and impact of the axial force of the friction pair on the annular surface of the retaining ring, reducing the probability of deformation and falling off of the retaining ring, reducing the probability of clutch pressure reduction, and prolonging the service life of the retaining ring and the clutch. After the pressing plate is fixed in the relative position, the abnormal noise and impact probability during the shifting process are reduced; the wear at the mating part of the outer diameter of the pressing plate and the inner hole of the hub body is reduced, and the service life of the hub body is prolonged. Due to the presence of the limiting elastic element and the limiting ball, the machining tolerance accuracy at the mating surface of the inner hole and the outer diameter is reduced, the processing cost is reduced, and the economy is improved. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is a schematic side view structural diagram of the present utility model;

[0015] In the figure, 1 is the pressing plate; 2 is the limiting elastic element; 3 is the limiting ball; 4 is the retaining ring; 5 is the hub body; 6 is the friction pair; 7 is the piston; 8 is the gear; 9 is the mounting hole. Detailed Embodiments

[0016] The technical solution of the present utility model will be further described below in conjunction with the drawings and specific embodiments.

[0017] The clutch pressing plate structure with a limiting elastic element and a limiting ball of the present utility model includes a pressing plate 1. A plurality of mounting holes 9 are provided on the side of the pressing plate 1, and the mounting holes 9 are evenly arranged at equal distances on the side of the pressing plate 1. A limiting elastic element 2 is provided at the bottom of the mounting hole 9, and a limiting ball 3 is freely arranged at the top of the limiting elastic element 2. The limiting ball 3 is located in the mounting hole 9; the pressing plate 1 is installed in the hub body 5 of the clutch, and the unilateral gap between the inner diameter of the hub body 5 and the outer diameter of the pressing plate 1 is smaller than the diameter of the limiting ball 3, so as to prevent the limiting ball 3 from slipping out.

[0018] Among them, a piston 7, a friction pair 6 and a gear 8 are coaxially arranged in sequence inside a hub body 5. A pressure plate 1 is located inside the hub body 5 and on the inner side of the installation position of a snap ring 4. The snap ring 4 is located in the snap ring groove of the hub body 5. The limiting elastic element 2 can adopt a limiting spring. The limiting ball 3 can adopt a limiting steel ball.

[0019] During installation, a number of installation holes 9 are drilled in the pressure plate 1 of the clutch. A number of limiting elastic elements 2 and limiting balls 3 are sequentially installed in the installation holes 9 to ensure that the limiting balls 3 slightly leak out of the installation holes 9 when the limiting elastic elements 2 are in a free state. The piston 7, the friction pair 6 and the gear 8 are coaxially installed inside the hub body 5 of the clutch in sequence. The clutch pressure plate 1 assembled with the limiting elastic elements 2 and the limiting balls 3 is pressed into the hub body 5 of the clutch and located on the inner side of the installation position of the snap ring 4. The snap ring 4 is press-fitted into the snap ring groove of the hub body 5; the installation is completed.

[0020] During use, in the process of assembling the clutch, due to the pre-tightening force of the limiting elastic element 2, the limiting ball 3 is closely attached to the inner wall of the hub body 5; during the rotation and working process of the clutch, the limiting ball 3 is also closely attached to the inner wall of the hub body 5 due to the action of centrifugal force, thereby ensuring the axial fixation of the clutch pressure plate 1 after assembly.

[0021] When the clutch is engaged, the pressure oil pushes the piston 7 to move axially to compress the friction pair 6. The friction pair 6 is compressed due to the thrust of the piston and the limitation of the pressure plate 1 and the snap ring 4. The gear 8 and the hub body 5 are combined through the internal and external spline fit, thereby realizing power transmission. In this process, the impact force of the movement of the friction pair 6 is first transmitted to the pressure plate 1 and then to the snap ring 4. Since the stress area of the pressure plate 1 is relatively large, the impact of the axial force of the friction pair on the snap ring is reduced, and the risk of deformation of the snap ring is reduced. At the same time, due to the fixation of the pressure plate, the friction between the pressure plate and the hub body is reduced, the probability of abnormal noise during gear shifting is reduced, and the service life of the hub body is extended.

[0022] The utility model improves the existing clutch pressure plate structure. The pressure plate is fixed by the limiting elastic element and the limiting ball to prevent the pressure plate from moving freely. During the engagement and disengagement processes of the clutch, the impact force of the reciprocating movement of the friction pair is first transmitted to the pressure plate with a large contact area and then to the snap ring, thereby greatly reducing the pressure and impact of the axial force of the friction pair on the annular surface of the snap ring, reducing the probability of deformation and shedding of the snap ring; at the same time, due to the fixation of the pressure plate, the friction between the pressure plate and the hub body is reduced, the probability of abnormal noise during gear shifting is reduced, and the service life of the hub body is extended. The pressure plate structure is simple in assembly and complete in function, and is especially suitable for construction machinery components such as transmission clutches.

Claims

1. A clutch pressure plate structure with a limiting elastic element and a limiting ball, characterized in that: The invention comprises a pressure plate (1), a plurality of mounting holes (9) are opened on the side of the pressure plate (1), a limiting elastic element (2) is arranged at the bottom of the mounting hole (9), a limiting ball (3) is arranged on the top of the limiting elastic element (2), and the limiting ball (3) is located in the mounting hole (9); the pressure plate (1) is installed in the hub body (5) of the clutch, and the single-sided gap between the inner diameter of the hub body (5) and the outer diameter of the pressure plate (1) is smaller than the diameter of the limiting ball (3).

2. The clutch pressure plate structure with a limiting elastic element and a limiting ball according to claim 1, characterized in that: A piston (7), a friction pair (6) and a gear (8) are coaxially arranged in sequence in the hub body (5).

3. The clutch pressure plate structure with a limiting elastic element and a limiting ball according to claim 1, characterized in that: The pressure plate (1) is located inside the hub body (5), and is located inside the mounting position of the retaining ring (4).

4. The clutch pressure plate structure with limiting elastic element and limiting ball according to claim 3, characterized in that: The retaining ring (4) is located in the retaining ring groove of the hub body (5).

5. The clutch pressure plate structure with limiting elastic element and limiting ball according to claim 1, characterized in that: The limiting elastic element (2) is a limiting spring.

6. The clutch pressure plate structure with limiting elastic element and limiting ball according to claim 1, characterized in that: The limiting ball (3) is a limiting steel ball.

7. The clutch pressure plate structure with a limiting elastic element and a limiting ball according to claim 1, characterized in that: The mounting holes (9) are evenly and equidistantly arranged on the side of the pressing plate (1).

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