Electric power steering gear assembly structure and vehicle

Abstract

The utility model provides an electric power steering gear assembly structure and a vehicle, the electric power steering gear assembly structure comprises a shell, and an input shaft, a dust cover and a motor which are connected with the shell, the electric power steering gear assembly structure also comprises a waterproof bearing, an upper bearing and a lower bearing of the input shaft are waterproof bearings, and the waterproof bearings can prevent water and foreign matters from entering the assembly structure through the input shaft; the locking piece compresses and deforms the dust cover, the dust cover is arranged on the shell of the assembly structure in a sealed mode through the locking piece, the motor is connected with the shell in a sealed mode, a completely-closed space is formed in the electric power steering gear assembly structure, and air leakage is prevented; the one-way vent valve exhausts air inside the assembly structure outwards, external foreign matter cannot enter the assembly structure, firstly, water and the foreign matter are prevented from entering the assembly structure from the input shaft, if the water and the foreign matter enter the assembly structure, a waterproof bearing of the motor can also prevent the water and the foreign matter from entering the motor, and normal operation of the motor is guaranteed. And the situation that the motor loses efficacy and does not assist power is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile steering systems, in particular to an electric power steering assembly structure and a vehicle. Background Art

[0002] Steering refers to the driver's intervention in the lateral movement of the vehicle, that is, the driver controls the lateral power of the vehicle. The steering system is an important component of the car. Its functions can be roughly divided into two parts. The first is that the driver controls the direction of the car's movement by controlling the steering wheel's turning angle around the kingpin; the second is to use the reaction force of the steering wheel to feedback the movement force of the whole vehicle and tires to the driver.

[0003] With the continuous development of modern control theory and advanced automobile technology, automobile electric steering systems have been widely used. Off-road vehicles need to be equipped with automobile electric steering systems with better performance due to the requirements of their use environment. The current electric steering system has poor sealing and waterproof performance. When the electric steering system is in normal use, water and foreign objects can easily enter the electric steering system. Even in extreme working conditions, off-road vehicles may cause the dust cover of the electric power steering assembly to be damaged, and water and foreign objects will enter the motor from the worm gear bearing of this motor. After the electric power steering assembly is filled with water and foreign objects, the gear rack will rust, make abnormal noises and get stuck. Further, the motor will fail due to water ingress, resulting in the electric power steering assembly having no power assistance.

[0004] Therefore, it is urgent to design an electric power steering assembly structure and a vehicle to solve the above problems. Utility Model Content

[0005] The purpose of the embodiments of the utility model is to provide an electric power steering assembly structure and a vehicle, which solves the problem that the electric power steering assembly has poor sealing and waterproof performance, the gear rack rusts and makes strange noises and gets stuck after water and foreign objects enter, and further causes the motor to fail due to water ingress, resulting in the electric power steering assembly having no power assistance.

[0006] In order to achieve the above-mentioned object, the embodiment of the utility model provides an electric power steering assembly structure, including a housing and an input shaft, a dust cover and a motor connected to the housing, and also includes:

[0007] Waterproof bearings: the upper and lower bearings of the input shaft are both waterproof bearings, which can prevent water and foreign matter from entering the interior of the assembly structure through the input shaft;

[0008] A locking member, wherein the locking member compresses and deforms the dust cover and seals the dust cover on the housing of the assembly structure, wherein the motor is sealed and connected to the housing, and a completely closed space is formed inside the electric power steering assembly structure to prevent air leakage;

[0009] A one-way vent valve discharges the internal air of the assembly structure to the outside, prevents external foreign matter from entering, balances the internal air pressure of the assembly structure, and prevents water and foreign matter from entering.

[0010] Optionally, the locking member is an inner locking clamp and an outer locking clamp respectively arranged at two ends of the dust cover, and the dust cover is sealed on the shell of the assembly structure through the locking member.

[0011] Optionally, sealant is applied to the connection interface between the motor and the assembly housing and then fastened with bolts to prevent air leakage.

[0012] Optionally, the bearing at the turbine of the motor is configured as a waterproof bearing to prevent water and foreign matter from entering the interior of the motor.

[0013] Optionally, the one-way vent valve is mounted on the shell of the assembly structure.

[0014] Optionally, the electric power steering assembly structure also includes meshing gears and racks.

[0015] Optionally, the electric power steering assembly structure also includes a steering tie rod.

[0016] Optionally, the dust cover is made of rubber material, and two left and right dust covers are provided, one end of the two dust covers is respectively connected to the steering tie rod, and the other end is connected to the shell of the assembly structure.

[0017] A vehicle comprises the above-mentioned electric power steering assembly structure.

[0018] The utility model application has the following advantages or beneficial effects:

[0019] 1. First, prevent water and foreign matter from entering the interior of the assembly structure from the input shaft. If they enter the interior of the assembly structure, the waterproof bearing of the motor can also prevent water and foreign matter from entering the interior of the motor, ensuring the normal operation of the motor and avoiding the situation where the motor fails to assist, thereby increasing the waterproof performance of the entire assembly structure.

[0020] 2. The dust cover is sealed on the housing of the assembly structure through a locking piece. After applying sealant on the connection interface between the motor and the assembly housing, it is fastened with bolts. The assembly structure forms a completely enclosed space to prevent air leakage.

[0021] 3. The one-way vent valve discharges the internal air of the assembly structure to the outside, preventing external foreign matter from entering, balancing the internal air pressure of the assembly structure, and ensuring the cleanliness and pressure balance of the internal space. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of an electric power steering assembly structure provided by an embodiment of the utility model;

[0023] Figure 2 A cross-sectional view of an input shaft of an electric power steering assembly structure provided by an embodiment of the utility model;

[0024] Figure 3 A schematic structural diagram of a dust cover of an electric power steering assembly structure provided by an embodiment of the utility model;

[0025] Figure 4 A schematic diagram of the connection between a motor and a housing of an electric power steering assembly structure provided by an embodiment of the utility model;

[0026] Figure 5 A schematic diagram of a one-way vent valve of an electric power steering assembly structure provided by an embodiment of the utility model;

[0027] Figure 6 A cross-sectional view of a motor of an electric power steering assembly structure provided in an embodiment of the utility model.

[0028] Among them: 1. Housing; 2. Input shaft; 3. Dust cover, 4. Motor; 5. Waterproof bearing; 6. Locking piece; 7. One-way vent valve; 8. Inner locking clamp; 9. Outer locking clamp; 10. Bolt; 11. Steering tie rod. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Nowadays, most cars are equipped with power steering systems to control the steering of the car. There are two types of power steering systems, hydraulic and electric. The hydraulic type assists the driver's steering operation by applying hydraulic pressure to the steering gear; the electric type does not need to use the power of the engine, which is more fuel-efficient. Therefore, in recent years, many cars have adopted electric power steering systems. Many models are equipped with electric power steering systems, including off-road vehicles. Because of the requirements of their use environment, off-road vehicles often drive in places with large amounts of water or a lot of mud and sand. They need to be equipped with better-performing automobile electric steering systems, such as higher requirements for the stability and waterproof performance of automobile electric steering systems. The current electric steering system has poor sealing and waterproof performance. When the electric steering system is in normal use, water and foreign objects can easily enter the electric steering system. Even in extreme working conditions, off-road vehicles will cause the dust cover of the electric power steering assembly to be damaged, and water and foreign objects will enter the motor 4 from the worm gear bearing of this motor. After the electric power steering assembly is filled with water and foreign objects, the gear rack rusts, makes abnormal noises and gets stuck, and further the motor 4 fails to enter the water, resulting in no power assistance to the electric power steering assembly.

[0031] Therefore, it is urgent to design an electric power steering assembly structure and a vehicle to solve the above problems.

[0032] As attached Figure 1 -Attached Figure 6 As shown, the embodiment of the utility model provides an electric power steering assembly structure and a vehicle, which can solve the problem that the existing electric power steering assembly has poor sealing and waterproof performance, and the gear rack rusts and makes abnormal noises and gets stuck after water and foreign objects enter, which further causes the motor 4 to fail due to water ingress, resulting in the electric power steering assembly having no power assistance. The electric power steering assembly structure includes a shell 1 and an input shaft 2, a dust cover 3 and a motor 4 interconnected with the shell 1. Other unmentioned components are not directly related to the parts claimed for protection in this application and will not be repeated here. The conventional structures of these components are common knowledge.

[0033] The electric power steering assembly structure also includes: a waterproof bearing 5, the upper and lower bearings of the input shaft 2 are both waterproof bearings 5, as shown in the attached Figure 2 As shown, the waterproof bearing 5 can prevent water and foreign matter from entering the interior of the assembly structure through the input shaft 2; similarly, the bearing at the turbine of the motor 4 is set as a waterproof bearing 5. The waterproof bearings 5 ​​used in this application are all bearing structures with waterproof function in the prior art, which will not be repeated here. First, water and foreign matter are prevented from entering the interior of the assembly structure through the input shaft 2. If they enter the interior of the assembly structure, the waterproof bearing 5 of the motor 4 can also prevent water and foreign matter from entering the interior of the motor 4, thereby ensuring the normal operation of the motor 4, avoiding the situation where the motor 4 fails to assist, and increasing the waterproof performance of the entire assembly structure.

[0034] In case of extremely rare off-road conditions, the rubber dust cover 3 of the electric power steering assembly is damaged, and water and foreign matter enter the interior of the electric power steering assembly. At this time, the waterproof bearing of the turbine of the motor 4 works to prevent water and foreign matter from entering the interior of the motor 4, and prevent the problem of the electric power steering assembly not assisting. The schematic diagram of the waterproof bearing 5 of the turbine of the motor 4 is attached. Figure 6 However, the gear rack of the electric power steering assembly will rust and make abnormal noises due to water immersion. In addition, foreign objects entering the electric power steering assembly will also cause abnormal noises, thereby reminding the driver that the electric power steering assembly is faulty and requiring timely repair.

[0035] In addition, the electric power steering assembly structure also includes a locking member 6, which compresses and deforms the dust cover 3 and seals it on the housing 1 of the assembly structure. Figure 3 As shown, the motor 4 is sealed and connected to the housing 1 of the assembly, and a completely closed space is formed inside the electric power steering assembly structure to prevent air leakage; the locking member 6 is an inner locking clamp 8 and an outer locking clamp 9 respectively arranged at both ends of the dust cover 3, which are easy to install and disassemble, and the dust cover 3 is sealed on the housing 1 of the assembly structure through the locking member. The connection interface between the motor 4 and the housing 1 of the assembly is coated with sealant and fastened with bolts 10 to prevent air leakage. The electric power steering assembly forms a completely closed space through the above measures.

[0036] A one-way vent valve 7 is also provided. The one-way vent valve 7 discharges the internal air of the assembly structure to the outside, and foreign matter from the outside cannot enter. The internal air pressure of the assembly structure is balanced to prevent water and foreign matter from entering. Because the electric power steering assembly forms a completely closed space through the above measures, when the electric power steering assembly is steering, the internal air pressure increases. In order to ensure that the internal and external air pressures are consistent, a one-way vent valve 7 is added for ventilation. The schematic diagram of the one-way vent valve 7 is shown in the attached figure. Figure 5 This one-way vent valve 7 can only discharge the internal air to the outside, and external foreign matter cannot enter, thereby ensuring the cleanliness and pressure balance of the internal space.

[0037] In the utility model application, the dust cover 3 is sealed on the shell 1 of the assembly structure through a locking piece, and the connection interface between the motor 4 and the shell 1 of the assembly is coated with sealant and then fastened with bolts 10. The assembly structure forms a completely closed space to prevent air leakage. The one-way vent valve 7 discharges the internal air of the assembly structure to the outside, and external foreign matter cannot enter. The internal air pressure of the assembly structure is balanced to ensure that the assembly structure can be used normally, and the cleanliness and pressure balance of the internal space are ensured to prevent water and foreign matter from entering the interior of the assembly structure from the input shaft 2. If water and foreign matter enter the interior of the assembly structure, the waterproof bearing 5 of the motor 4 can also prevent water and foreign matter from entering the interior of the motor 4, thereby ensuring the normal operation of the motor 4 and avoiding the situation where the motor 4 fails to assist, thereby increasing the waterproof performance of the entire assembly structure.

[0038] A vehicle comprises the above-mentioned electric power steering assembly structure.

[0039] The vehicle is provided with an electric power steering assembly structure to prevent water and foreign matter from entering the interior of the assembly structure through the input shaft 2, and to prevent water and foreign matter from entering the interior of the motor 4, thereby ensuring the normal operation of the motor 4 and avoiding the situation where the motor 4 fails to provide power. The entire electric power steering assembly structure forms a completely enclosed space, and the internal air is discharged to the outside through the one-way vent valve 7, so that external foreign matter cannot enter, and the vehicle has good waterproof and foreign matter prevention properties.

[0040] The above are only specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An electric power steering assembly structure, comprising a housing, an input shaft connected to the housing, a dust cover and a motor, characterized in that: Also includes: Waterproof bearings: the upper and lower bearings of the input shaft are both waterproof bearings, and the waterproof bearings prevent water and foreign matter from entering the interior of the assembly structure through the input shaft; A locking member, wherein the locking member compresses and deforms the dust cover and seals the dust cover on the housing of the assembly structure, wherein the motor is sealed and connected to the housing, and a completely closed space is formed inside the electric power steering assembly structure to prevent air leakage; A one-way vent valve discharges the internal air of the assembly structure to the outside, prevents external foreign matter from entering, balances the internal air pressure of the assembly structure, and prevents water and foreign matter from entering.

2. The electric power steering assembly structure according to claim 1, characterized in that: The locking member is an inner locking clamp and an outer locking clamp respectively arranged at two ends of the dust cover, and the dust cover is sealed on the housing of the assembly structure through the locking member.

3. The electric power steering assembly structure according to claim 2 is characterized in that: The connection surfaces between the motor and the housing are coated with sealant and then fastened with bolts to achieve a sealed connection and prevent air leakage.

4. The electric power steering assembly structure according to claim 1, characterized in that: The bearing at the turbine of the motor is configured as a waterproof bearing to prevent water and foreign matter from entering the interior of the motor.

5. The electric power steering assembly structure according to claim 4, characterized in that: The one-way vent valve is installed on the shell of the assembly structure.

6. The electric power steering assembly structure according to claim 1, characterized in that: The electric power steering gear assembly structure also includes a gear and a rack that are meshed with each other.

7. The electric power steering assembly structure according to claim 1, characterized in that: The electric power steering gear assembly structure also includes a steering tie rod.

8. The electric power steering assembly structure according to claim 7, characterized in that: The dust cover is made of rubber material and is provided with two left and right ones. One end of the two dust covers is respectively connected to the steering tie rod, and the other end is connected to the shell of the assembly structure.

9. A vehicle, characterized in that: The invention comprises the electric power steering assembly structure as described in any one of claims 1 to 8.

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