CN102032280A - Damping coupling - Google Patents

Abstract

The invention discloses a damping coupling which comprises a flange plate, a driven piece, a disk hub, a damping disk and damping springs, wherein the flange plate is connected with the driven piece through a first rivet; the disk hub consists of a disk hub web plate and a disk hub core plate; a disk hub core at the left side of the disk hub web plate is sleeved with a first damping washer; a disk hub core at the right side of the disk hub web plate is sequentially sleeved with a second damping washer, a positioning washer, a butterfly-shaped spring and a damping disk from left to right; the driven piece, the disk hub web plate and the damping disk are provided with elongated holes in corresponding positions in the circumferential direction; the damping springs are arranged in the elongated holes; the driven piece, the disk hub and the damping disk are connected through a second rivet; and the disk hub can rotate an angle alpha relative to the driven piece and the damping disk. The invention can effectively cut down the gear shift impact of a transmission, reduce adverse effects of the vibration of a transmission system on an electromotor and improve the reliability and the service life of the electromotor and parts of the transmission system.

Description

Vibration coupling

technical field

The invention relates to the technical field of automobiles, in particular to a vibration-damping coupling used in electric automobiles, which is used for coupling between electric motors and transmissions.

Background technique

The connection between the electric motor and the transmission of an electric vehicle generally adopts a rigid coupling, because it does not need to shift gears, there is no impact vibration caused by shifting, and the vibration of the transmission system has less obvious influence on the motor. With the increasingly rich theory of electric vehicles, the transmission is replaced by a two-speed or multi-speed transmission with automatic shifting, and the shifting inevitably produces shocks, and the rigid coupling cannot absorb the vibration generated during work between the electric motor and the transmission Impact; moreover, the vibration of the transmission system itself will also have an adverse effect on the motor, and will also reduce the reliability and life of the motor and transmission system components. Due to the compact structure of electric vehicles, various types of ordinary elastic couplings cannot be directly selected due to problems such as reliability and axial and radial dimensions. Therefore, it is necessary to redesign a coupling with a damping function to effectively improve the impact between the connected two shafts and transmit motion and torque.

Contents of the invention

The purpose of the present invention is to provide a compact vibration damping coupling, which can effectively reduce the shifting impact of the transmission, reduce the adverse effect of transmission system vibration on the motor, and improve the reliability and life of the motor and transmission system components.

In order to solve the above technical problems, the present invention provides a vibration damping coupling, a vibration damping coupling, including a flange (1), a driven piece (2), a hub (3), a vibration damping disc ( 4) and damping spring (5), the key is: the right end of the flange (1) extends outwards to form an opening (1a), and the outer edge of the opening (1a) has a ) the outer flange (1b) perpendicular to the axis, the outer flange (1b) of the flange (1) is connected with the driven plate (2) through the first rivets (9) evenly distributed on the circumference; the The hub (3) is composed of a hub web (3a) and a hub core (3b), the hub core (3b) on the left side of the hub web (3a) is fitted with a first damping washer (6) , the first damping washer (6) is T-shaped and the outer diameter of the left end is smaller than the outer diameter of the right end, the driven piece (2) is sleeved on the outer circumference of the left end of the first damping washer (6) and the driven piece The right end face of (2) is pressed on the step of the first damping washer (6); the hub core (3b) on the right side of the hub web (3a) is sequentially fitted with the second damping washer ( 7), positioning washer (10), butterfly spring (8) and damping disc (4); the driven piece (2), hub web (3a) and damping disc (4) are in the circumferential direction There are elongated holes corresponding to the position, the damping spring (5) is installed in the elongated hole, and the driven plate (2), disc hub (3) and damping disc (4) are connected by second rivets (11) evenly distributed on the circumference, and the hub (3) can be rotated by an angle α relative to the driven plate (2) and the damping disc (4), and -14°≤α≤14° .

With the above technical solution, the flange is set on the output shaft of the drive motor, the disc hub is set on the input shaft of the transmission, and the motor and the transmission are connected together through the present invention. When the motor is running, the output shaft of the motor drives the flange to rotate synchronously, and the flange drives the driven plate that is riveted together with it to rotate together. Since the hub can rotate at a certain angle relative to the driven plate and the damping plate, the driven The plate compresses the damping spring, so that the damping spring pushes the disc hub to rotate, transmits the power to the disc hub, and finally transmits the power to the transmission. The impact load of the fast rotation of the driven plate is absorbed by the shock absorbing spring, which plays a role in buffering the rotating impact and avoiding resonance caused by torsional vibration; the positioning washer set on the right side of the disc hub plate compresses and positions the damping washer, and the butterfly The spring can adjust the damping value of the damping washer, so that the damping of the product is uniform and stable.

The right end surface of the above-mentioned positioning washer (10) is provided with four protrusions (10a) uniformly distributed on the circumference, and the protrusions (10a) extend along the axis of the positioning washer (10), and the protrusions (10a) pass through the butterfly The inner hole of the shaped spring (8) and stretches out from the damping disc (4).

The outer long side of the elongated hole of the driven piece (2) is flanged outwards in the direction opposite to the disc hub web (3a) to form the first limiting wall (2a), and the vibration damping disc (4) is long The outer long side of the bar hole is also turned outwards in the direction opposite to the hub web (3a) to form a second limiting wall (4a), the first limiting wall (2a) and the second limiting wall (4a) form the "eight" shape.

In order to facilitate processing and manufacturing, there is an arc-shaped long notch (3c) on the outer circumference of the above-mentioned hub web (3a) for the second rivet (11) to pass through. There is a circular hole for the passage of the second rivet (11).

The inner hole of the flange (1) is a flat key hole, and the inner hole of the disc hub (3) is a spline hole. The flange is set on the output shaft of the driving motor through the flat key hole, and the disc hub is set on the input shaft of the transmission through the spline hole.

Beneficial effects of the present invention:

1) The disc hub is designed into two parts, the disc hub plate and the disc hub core, which increases the design space of the damping spring, and can install a damping spring with high stiffness and toughness to make the product start more smoothly during use and avoid Damping compression deformation, fracture damage phenomenon, in order to prolong the service life of the damping spring.

2) The damping washer increases the friction area and the wear coefficient is stable. The vibration damping plate uses the deformation principle of the butterfly spring to compensate the wear gap of the axial parts, ensuring more stable damping and superior performance. .

In summary, the present invention utilizes the working principle of the clutch to carry out ingenious conception, and its structure is simple and reliable, which can effectively absorb the vibration energy generated during the operation between the motor and the transmission, and reduce the starting, braking, rapid acceleration, and rapid deceleration of electric vehicles. The vibration in other working conditions can avoid the adverse impact on the transmission system and the motor due to the impact, and the vibration damping performance is excellent, which improves the comfort of the vehicle.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Fig. 2 is A-A sectional view among Fig. 1.

In the figure: 1 is the flange, 2 is the driven plate, 3 is the hub, 4 is the damping plate, 5 is the damping spring, 6 is the first damping washer, 7 is the second damping washer, 8 is the butterfly Spring, 9 are the first rivets, 10 are positioning washers, 11 are the second rivets, 12 are motor output shafts, 13 are flat keys, and 14 are transmission input shafts.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

A damping coupling as shown in Figures 1 and 2 consists of a flange 1, a driven plate 2, a hub 3, a damping disc 4 and a damping spring 5. The flange plate 1, the driven plate 2, the disc hub 3 and the damping plate 4 are all disc structures and coaxially installed. The inner hole of the flange 1 is a flat key hole, and the flange 1 is set on the motor output shaft 12 through the flat key 13; the right end of the flange 1 extends outward to form an opening 1a, and the outer edge of the opening 1a has a The outer flange 1b perpendicular to the axis of the disc 1 is connected to the driven piece 2 by first rivets 9, and the first rivets 9 are evenly distributed on the circumference. The hub 3 is composed of a hub web 3a and a hub core 3b. The inner hole of the hub core 3b is a spline hole. The hub core 3b is set on the transmission input shaft 14, and the two are connected by a spline. The first damping washer 6 is set on the hub core 3b on the left side of the hub web 3a. The first damping washer 6 is T-shaped and the outer diameter of the left end is smaller than the outer diameter of the right end. The driven plate 2 is set on the left end of the first damping washer 6. On the outer circumference and the right end face of the driven piece 2 is pressed on the step of the first damping washer 6; the hub core 3b on the right side of the hub web 3a is sequentially fitted with the second damping washer 7, positioning Washer 10, Belleville spring 8 and damping disc 4. The driven piece 2, the hub web 3a and the damping disc 4 are provided with four elongated holes corresponding to the positions on the disc body, and the four elongated holes are located between the driven piece 2, the hub web 3a and the damping disc. 4 are evenly distributed in the circumferential direction, and its center is on the axis of the three discs. The damping spring 5 is installed in the elongated hole, and the driven plate 2 , the disc hub web 3 a and the damping disc 4 are elastically connected by the damping spring 5 . The damping spring 5 is located on the outer circumference of the first damping washer 6 , the second damping washer 7 , the positioning washer 10 and the disc spring 8 .

As shown in Figure 2, the right end surface of the positioning washer 10 is provided with four protrusions 10a evenly distributed on the circumference, the protrusions 10a extend along the axis of the positioning washer 10, the inner diameter of the butterfly spring 8 is greater than the outer diameter of the positioning washer 10, The protrusion 10 a of the positioning washer 10 passes through the inner hole of the butterfly spring 8 and protrudes from the damping disk 4 . The outer long side of the long strip hole of the driven plate 2 is turned outward toward the direction opposite to the disc hub web 3a to form the first limiting wall 2a, and the outer long side of the long strip hole of the damping disc 4 is also facing toward the opposite direction to the disc hub web 3a. The hub plate 3a is turned outward in the opposite direction to form the second limiting wall 4a. The first limiting wall 2a and the second limiting wall 4a have the same shape and opposite directions, forming a "eight" shape to carry out the shock absorbing spring 5 limit.

As shown in Figures 1 and 2, the driven piece 2, the disc hub 3 and the damping disc 4 are connected by second rivets 11, and there are four second rivets 11 evenly distributed on the circumference. There is an arc-shaped long notch 3c on the outer circumference of the hub web 3a for the passage of the second rivet 11, so as to let the second rivet 11 go and enable the hub 3 to rotate by an angle α relative to the driven piece 2 and the damping disc 4, -14°≤α≤14°. The driven plate 2 and the damping disc 4 are provided with round holes for the passage of the second rivet 11 , and the driven plate 2 and the damping disc 4 are fixedly connected by the second rivet 11 . It is also possible to open an arc-shaped elongated hole on the outer circumference of the hub web 3 a corresponding to the installation position of the second rivet 11 to give way to the second rivet 11 while ensuring the same rotation angle α.

When the transmission changes gears automatically, the electric motor stops working and cuts off the power, so that the gears can be changed smoothly. When the gear shifting is completed, the electric motor will immediately power up and work. At this time, because the power loaded by the electric motor may not match the vehicle load, a certain mechanical shock will be generated in the transmission system. Due to the constant change of the vehicle load, the transmission will shift gears frequently to adapt to the working conditions, resulting in a high impact frequency. This impact is effectively reduced due to the existence of this coupling, which reduces its adverse effects on the transmission system and the motor, and improves the efficiency of the transmission system. Component reliability and life.

Claims (5)

1. A damping coupling, including a flange (1), a driven plate (2), a hub (3), a damping disc (4) and a damping spring (5), characterized in that: The right end of the flange (1) extends outwards to form an opening (1a), and the outer edge of the opening (1a) has an outer flange (1b) perpendicular to the axis of the flange (1). The flange (1b) of the blue plate (1) is connected with the driven plate (2) through the first rivets (9) uniformly distributed on the circumference; the hub (3) is composed of hub webs (3a) and The hub core (3b) is formed, the hub core (3b) on the left side of the hub web (3a) is fitted with a first damping washer (6), and the first damping washer (6) is T-shaped and The outer diameter of the left end is smaller than the outer diameter of the right end, the driven piece (2) is set on the outer circumference of the left end of the first damping washer (6) and the right end surface of the driven piece (2) is pressed against the first damping washer (6) ) on the step; the hub core (3b) on the right side of the hub web (3a) is fitted with the second damping washer (7), positioning washer (10), butterfly spring (8 ) and the damping disc (4); the driven plate (2), the disc hub web (3a) and the damping disc (4) have elongated holes corresponding to the position in the circumferential direction, and the damping spring (5) Installed in the long hole, the driven piece (2), the disc hub (3) and the damping disc (4) are connected by second rivets (11) evenly distributed on the circumference , the disc hub (3) can rotate an angle α relative to the driven plate (2) and the damping disc (4), and -14°≤α≤14°. 2. The damping coupling according to claim 1, characterized in that: the right end surface of the positioning washer (10) is provided with four protrusions (10a) uniformly distributed on the circumference, and the protrusions (10a) ) extends along the axis of the positioning washer (10), and the protrusion (10a) passes through the inner hole of the butterfly spring (8) and protrudes from the damping disc (4). 3. The vibration-damping coupling according to claim 1, characterized in that: the outer long side of the elongated hole of the driven piece (2) is turned outwards in the direction opposite to the hub web (3a) The edge forms the first limiting wall (2a), and the outer long side of the long hole of the damping disc (4) is also turned outwards in the direction opposite to the hub web (3a) to form the second limiting wall (4a), the first limiting wall (2a) and the second limiting wall (4a) form a "eight" shape. 4. The vibration-damping coupling according to claim 1, characterized in that: there is an arc-shaped long gap (3c) on the outer circumference of the hub web (3a) for the passage of the second rivet (11), A circular hole for the second rivet (11) to pass through is opened on the driven plate (2) and the damping disc (4). 5. The damping coupling according to claim 1, characterized in that: the inner hole of the flange (1) is a flat key hole, and the inner hole of the hub (3) is a spline hole.

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