Power-assisted upper shaft for vehicle steering

Abstract

The utility model discloses a steering power-assisted upper shaft for a vehicle, which belongs to the field of automobile production and comprises a power-assisted upper shaft body, and the power-assisted upper shaft body is sequentially divided into a steering gear mounting part, a bearing assembling part, a steering wheel connecting part and a steering wheel locking part. Compared with the prior art, the power-assisted upper shaft has the advantages that the filling foam is arranged in the cavity of the power-assisted upper shaft body, the energy absorption function of the power-assisted upper shaft body is increased, the possibility of fracture of the power-assisted upper shaft body is further reduced, the high-elasticity plastic rod is arranged in the filling foam, and it is guaranteed that when the power-assisted upper shaft body is fractured, the power-assisted upper shaft body cannot be damaged. And the deviation of fracture of the power-assisted upper shaft body can be limited, so that a driver is prevented from being hurt by the fractured power-assisted upper shaft body.

Description

Technical Field

[0001] The utility model relates to the field of automobile production, in particular to a power-assisted upper shaft for vehicle steering. Background Art

[0002] In the existing automobile production process, in order to ensure that the steering wheel can smoothly transmit the rotation control angle to the front wheels and reduce the impact of wheel vibration on the steering wheel, a power-assisted system needs to be installed between the steering wheel and the wheels. The power-assisted upper shaft in the power-assisted system is an important component that transmits the steering torque applied by the driver to the steering wheel to the steering gear.

[0003] The existing power-assisted upper shaft of a vehicle steering system is composed of a steering gear mounting portion, a bearing assembly portion, a steering wheel connection portion, and a steering wheel locking portion. In order to facilitate the installation and arrangement of other components, the shaft is usually designed as a hollow part.

[0004] In addition to reducing the overall weight, the power-assisted upper shaft body in a hollow state also has a certain energy-absorbing effect, thereby ensuring that it can prevent injuries in the event of an accidental collision. However, when the power-assisted upper shaft body in a hollow state encounters a larger collision force, the power-assisted upper shaft body will be prone to fracture due to the hollow structure. When the power-assisted upper shaft body fractures, the fracture position can easily injure the driver under the action of elastic force. Utility Model Content

[0005] The technical problem to be solved by the utility model is that when the existing power steering upper shaft for vehicles breaks, there is no corresponding protection mechanism, so that the hollow shaft body at the fracture position bounces into the cab and injures people when it breaks.

[0006] In order to solve the above technical problems, the technical solution provided by the utility model is: a power-assisted upper shaft for vehicle steering, including a power-assisted upper shaft body, which is divided into a steering gear mounting part, a bearing assembly part, a steering wheel connection part and a steering wheel locking part in sequence. The power-assisted upper shaft body is a hollow structure, and a high-elastic plastic rod is provided inside the cavity of the power-assisted upper shaft body. A filling foam for filling the cavity is provided between the inside of the cavity of the power-assisted upper shaft body and the high-elastic plastic rod.

[0007] As an improvement, the interior of the steering gear mounting portion is provided with an internal spline for connecting to the steering gear, and the outer wall end of the steering wheel connecting portion is provided with an external spline connected to the steering wheel.

[0008] As an improvement, the outer wall of the steering wheel locking portion is provided with threads.

[0009] As an improvement, a baffle for limiting the position of the highly elastic plastic rod is provided on one side of the bottom surface of the internal spline, and a closed sleeve for sealing the highly elastic plastic rod is provided in the through hole of the steering wheel locking portion.

[0010] As an improvement, the closed sleeve is connected to the central through hole of the steering wheel locking portion by welding.

[0011] As an improvement, the baffle is connected to the bottom surface of the highly elastic plastic rod through a bolt structure.

[0012] The advantages of the present invention over the prior art are that the device is equipped with filling foam inside the mold cavity of the power-assisting upper shaft body to increase its energy absorption function and further reduce the possibility of the power-assisting upper shaft body breaking, and a high-elasticity plastic rod is installed in the filling foam to ensure that when the power-assisting upper shaft body breaks, the deviation of the broken power-assisting upper shaft body can be limited, thereby preventing the broken power-assisting upper shaft body from injuring the driver. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a general structural diagram of a power-assisted upper shaft for vehicle steering.

[0014] Figure 2 The utility model is a structural diagram of the inner spline of a power-assisted upper shaft of a vehicle steering.

[0015] Figure 3 The utility model is a structural diagram of an external spline of a power-assisted upper shaft of a vehicle steering.

[0016] Figure 4 The utility model is a cross-sectional view of the overall structure of a power-assisted upper shaft for vehicle steering.

[0017] As shown in the figure: 1. Power-assisted upper shaft body; 11. Steering gear mounting part; 111. Internal spline; 12. Bearing assembly part; 13. Steering wheel connection part; 131. External spline; 14. Steering wheel locking part; 2. High-elastic plastic rod; 21. Baffle; 22. Closed shaft sleeve; 3. Filling foam. DETAILED DESCRIPTION

[0018] The present invention will be described in further detail below with reference to the accompanying drawings.

[0019] As the instruction manual Figure 1 、 2 As shown in Figures 3 and 4, the power-assist upper shaft body 1 includes a power-assist upper shaft body 1, which is divided into a steering gear mounting portion 11, a bearing assembly portion 12, a steering wheel connecting portion 13 and a steering wheel locking portion 14 in sequence. The power-assist upper shaft body 1 is a hollow structure. Through the hollow structure of the power-assist upper shaft body 1, the overall weight is reduced while the power-assist upper shaft body 1 has a certain energy-absorbing effect.

[0020] The interior of the steering gear mounting portion 11 is provided with an internal spline 111 for connecting to the steering gear, the outer wall end of the steering wheel connecting portion 13 is provided with an external spline 131 connected to the steering wheel, and the outer wall of the steering wheel locking portion 14 has a thread. When connecting the steering gear, the internal spline 111 is put on the external spline of the steering gear for fixation. Similarly, the external spline 131 connected to the steering wheel is inserted into the internal spline on the bottom surface of the steering wheel for connection. Use the corresponding nut to screw it on the thread on the outer wall of the steering wheel locking portion 14 to fix the position of the steering wheel.

[0021] A high elastic plastic rod 2 is provided inside the cavity of the power-assisted upper shaft body 1, and a filling foam 3 for filling the cavity is provided between the cavity of the power-assisted upper shaft body 1 and the high elastic plastic rod 2. A baffle 21 for limiting the position of the high elastic plastic rod 2 is provided on one side of the bottom surface of the internal spline 111, and a closed sleeve 22 for sealing the high elastic plastic rod 2 is provided in the through hole of the steering wheel locking part 14. The closed sleeve 22 is connected to the central through hole of the steering wheel locking part 14 by welding, and the baffle 21 is connected to the bottom surface of the high elastic plastic rod 2 by a bolt structure. The screw holes on the bottom surface of the highly elastic plastic rod 2 are aligned with the screw holes on the bottom surface of the baffle 21, and the screws are screwed in to fix them. The filling foam 3 is put into the cavity of the power-assisted upper shaft body 1 through the central through-hole of the steering wheel locking part 14 to enhance the energy absorption effect while preventing the highly elastic plastic rod 2 from vibrating at high frequencies due to collision. The column at the top end of the highly elastic plastic rod 2 is sleeved on the inner hole of the closed shaft sleeve 22, and then the outer wall of the closed shaft sleeve 22 is inserted into the through-hole at the top end of the steering wheel locking part 14 for sealing. Finally, an electric welder is used to weld the two together to prevent the filling foam 3 from falling off.

[0022] In the specific implementation of the present invention, when connecting the steering gear, the internal spline 111 is mounted on the external spline of the steering gear for fixing, and various assembly parts are installed on the shaft of the bearing assembly portion 12 through various fastening devices. Similarly, the external spline 131 connected to the steering wheel is inserted into the internal spline on the bottom surface of the steering wheel for connection, and the corresponding nut is screwed on the thread on the outer wall of the steering wheel locking portion 14 to fix the position of the steering wheel.

[0023] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. A power-assisted upper shaft for vehicle steering, comprising a power-assisted upper shaft body (1), wherein the power-assisted upper shaft body (1) is sequentially divided into a steering gear mounting portion (11), a bearing assembly portion (12), a steering wheel connecting portion (13), and a steering wheel locking portion (14), wherein the power-assisted upper shaft body (1) is a hollow structure, and is characterized in that: A high-elasticity plastic rod (2) is provided inside the cavity of the power-assist upper shaft body (1), and a filling foam (3) for filling the cavity is provided between the cavity of the power-assist upper shaft body (1) and the high-elasticity plastic rod (2).

2. The power-assisted upper shaft of a vehicle steering according to claim 1, characterized in that: An internal spline (111) for connecting to the steering gear is provided inside the steering gear mounting portion (11), and an external spline (131) connected to the steering wheel is provided at the outer wall end of the steering wheel connecting portion (13).

3. The power-assisted upper shaft of a vehicle steering according to claim 1, characterized in that: The outer wall of the steering wheel locking portion (14) is provided with threads.

4. The power-assisted upper shaft of a vehicle steering system according to claim 2, characterized in that: A baffle (21) for limiting the position of the high-elasticity plastic rod (2) is provided on one side of the bottom surface of the internal spline (111), and a closed shaft sleeve (22) for sealing the high-elasticity plastic rod (2) is provided in the through hole of the steering wheel locking portion (14).

5. The power-assisted upper shaft of a vehicle steering system according to claim 4, characterized in that: The closed shaft sleeve (22) is connected to the central through hole of the steering wheel locking portion (14) by welding.

6. The power-assisted upper shaft of a vehicle steering system according to claim 4, characterized in that: The baffle (21) is connected to the bottom surface of the high-elasticity plastic rod (2) via a bolt structure.

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