Power-assisted steering structure of automobile steering wheel

Abstract

The utility model discloses an automobile steering wheel power-assisted steering structure which is characterized in that a steering wheel is arranged on a body, the steering wheel is round, a steering shaft is connected to the center of the circumference of the steering wheel, a power-assisted assembly is arranged in the middle of the steering shaft, and the steering shaft is divided into two sections, namely a connecting section and a transmission section; one end of the connecting section is connected with the center of the steering wheel, the two ends of the transmission section are connected with universal joints, the connecting section is connected with the transmission section through the universal joints, the end, away from the connecting section, of the transmission section is connected with a transmission device, the transmission device is connected with the transmission section of the steering shaft through the same universal joint, and the two ends of the transmission device are connected with steering pull rods. The steering pull rods are connected with wheels, one side of the power assisting assembly is connected with a speed sensor, the speed sensor is used for detecting the vehicle speed, when the vehicle is steered at a high speed, the power assisting assembly provides small assisting power for the steering shaft, and when the vehicle is steered at a low speed, the power assisting assembly provides large assisting power for the steering shaft.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the automobile manufacturing technical field, and particularly relates to an automobile steering wheel steering assistance structure. BACKGROUND

[0002] The automobile steering wheel steering assistance structure is mainly divided into hydraulic power steering and electronic power steering, with the increasingly stringent environmental protection, the hydraulic power steering system is gradually eliminated because of its large power consumption and the problem of hydraulic oil leakage, and therefore does not meet the environmental protection requirements, and therefore most of the existing vehicles adopt the electronic power steering system, so as to ensure the safety of the steering wheel steering assistance under the premise of meeting the environmental protection requirements.

[0003] The existing electronic power steering system mainly recognizes the steering wheel steering angle and steering force through a torque sensor, feeds back the detected data to an electronic control unit, analyzes and processes the data through the electronic control unit, forms a final assistance instruction and sends the instruction to an electric motor, the electric motor drives the steering shaft to rotate according to different instructions, the force of the steering shaft and the force exerted on the steering wheel by the driver are superimposed to form a final combined torsion, and finally the power steering is realized, but since the electronic control unit analyzes the steering wheel rotation angle and steering force, when the vehicle slips at high speed, the novice driver is not familiar with the vehicle driving, and therefore when the vehicle is out of control, the driver will hit the direction, the force of the driver rotating the steering wheel and the force generated by the electronic assistance make the wheel rotation angle too large, and therefore the safety problem of the vehicle rollover is caused. SUMMARY

[0004] The utility model aims at providing an automobile steering wheel steering assistance structure to solve the above problems.

[0005] To achieve the above object, the utility model provides the following technical scheme: an automobile steering wheel steering assistance structure, the body is provided with a steering wheel, the steering wheel is circular, and a steering shaft is connected to the circumferential center position of the steering wheel, a power assistance assembly is arranged at the middle position of the steering shaft, the steering shaft is divided into two sections, and the steering shaft is divided into a connecting section and a transmission section, one end of the connecting section is connected to the center of the steering wheel, the other end of the connecting section is connected with a universal joint, the transmission section is connected with a universal joint at both ends, the connecting section and the transmission section are connected through the universal joint, one end of the transmission section away from the connecting section is connected with a transmission device, the transmission device is connected with the transmission section of the steering shaft through the same universal joint, and the transmission device is connected with a steering drag link at both ends, the steering drag link is connected with a wheel, one side of the power assistance assembly is connected with a speed sensor, the speed sensor is used for detecting the vehicle speed, when the vehicle is steered at high speed, the power assistance assembly provides small assistance to the steering shaft, and when the vehicle is steered at low speed, the power assistance assembly provides large assistance to the steering shaft.

[0006] Preferably, the power-assisted assembly comprises a driving motor, a rotating shaft, a driving gear, a transmission motor, a screw rod, a moving ring, an intermediate gear, a fixed gear and a shell, one side of the shell is fixedly arranged at the steering shaft connecting section, one side of the shell is provided with the driving motor, the output end of the driving motor is provided with the rotating shaft, the rotating shaft penetrates through the shell and is coaxially provided with the driving gear at the middle position of the rotating shaft, the driving gear is provided with the transmission motor away from one side of the shell, the output end of the transmission motor is connected with the screw rod, the screw rod is arranged in the same way as the rotating shaft, and the moving ring is coaxially arranged on the screw rod, one side of the moving ring is connected with the intermediate gear, the intermediate gear is adjacent to the steering shaft, and the coaxial gear is arranged on the steering shaft, and the intermediate gear is engaged with the fixed gear.

[0007] Preferably, one side of the moving ring is provided with a connecting rod, the connecting rod is connected with a rotating ring away from one side of the moving ring, and the intermediate gear is rotatably connected with the rotating ring.

[0008] Preferably, the transmission device comprises an output shaft, a rotating screw rod, a transmission cover and a transmission gear, the output shaft is connected with the transmission section, and the output shaft and the transmission section are connected through a universal joint, the output shaft is coaxially provided with the transmission gear at one end away from the transmission section, and the transmission gear is provided below the rotating screw rod, the two sections of the rotating screw rod are respectively connected with the rotating pull rod, and the rotating screw rod is engaged with the transmission gear, the transmission cover is arranged above the rotating screw rod, and the length of the transmission cover is greater than the length of the rotating screw rod.

[0009] Preferably, a dust cover is arranged at the connecting position of the rotating pull rod and the rotating screw rod, and the dust cover is used to prevent dust and gravel on the road from entering the connecting position of the rotating pull rod and the rotating screw rod during vehicle driving.

[0010] Preferably, the intermediate gear is divided into a large gear and a small gear, and the large gear and the small gear are coaxially arranged, and the transmission ratio of the large gear and the small gear is 1:2.

[0011] The technical effect and advantages of the utility model: in the use process, when the driver turns in the high-speed driving state, the power-assisted assembly will first drive the rotating shaft to rotate, so as to drive the driving gear to rotate through the rotating shaft, since the driving gear is engaged with the intermediate gear, when driving at high speed, the driving gear will drive the small gear to rotate, and the small gear will drive the fixed gear to rotate, at this time, the rotating amplitude of the steering shaft is small, so that the force generated by the resistance assembly and the force of the driver rotating the steering wheel will reduce the rotating amplitude of the vehicle, thereby avoiding sudden direction change

[0012] When the vehicle rollover phenomenon occurs, when the driver drives at low speed, the power assisting assembly first drives the rotating shaft to rotate, thereby driving the driving gear to rotate through the rotating shaft, since the driving gear is engaged with the intermediate gear, when driving at low speed, the driving gear drives the large gear to rotate, the large gear drives the fixed gear to rotate, at this time, the rotating shaft has a large rotating amplitude, thereby the force generated by the resistance assembly and the force of the driver rotating the steering wheel, so that the rotating amplitude of the vehicle is reduced, thereby the steering at low speed is more labor-saving. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structure schematic view of the utility model;

[0014] Figure 2 It is a whole structure sectional view of the utility model;

[0015] Figure 3 It is a structure schematic view of the utility model; Figure 2 It is a local enlarged view of A part;

[0016] Figure 4 It is a local sectional view of the power assisting assembly of the utility model;

[0017] Figure 5 It is a whole structure schematic view of the power assisting assembly of the utility model.

[0018] In the drawing:

[0019] 1, the body; 2, the steering wheel; 3, the steering shaft; 3a, the connecting section; 3b, the transmission section; 4, the power assisting assembly; 41, the driving motor; 42, the rotating shaft; 43, the driving gear; 44, the transmission motor; 45, the screw rod; 46, the moving ring; 461, the connecting rod; 462, the rotating ring; 47, the intermediate gear; 471, the large gear; 472, the pinion; 48, the fixed gear; 49, the shell; 5, the universal joint; 6, the transmission device; 61, the output shaft; 62, the rotating screw; 63, the transmission cover; 64, the transmission gear; 7, the steering pull rod; 71, the dust cover; 8, the wheel; DETAILED DESCRIPTION

[0020] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0021] The utility model provides a kind of automobile steering wheel steering assist structure as shown in the figure, body 1 is provided with steering wheel 2, steering wheel 2 is circular, and steering wheel 2 circumferential center position is connected with steering shaft 3, steering shaft 3 middle position is provided with assist component 4, steering shaft 3 is divided into two sections, and steering shaft 3 is divided into connecting section 3a and transmission section 3b, connecting section 3a one end is connected with the center of steering wheel 2, and connecting section 3a other end is connected with universal joint 5, transmission section 3b both ends are connected with universal joint 5, connecting section 3a is connected with transmission section 3b by universal joint 5, transmission section 3b is connected with transmission device 6 in the end away from connecting section 3a, transmission device 6 is connected with the transmission section 3b of steering shaft 3 by identical universal joint 5, and transmission device 6 both ends are connected with steering drag link 7, steering drag link 7 is connected with wheel 8, assist component 4 one side is connected with speed sensor, speed sensor is used to detect vehicle speed, when vehicle speed is fast to steer, assist component 4 provides smaller assist to steering shaft 3, when vehicle speed is slow to steer, assist component 4 provides larger assist to steering shaft 3.

[0022] Specifically, assist component 4 includes driving motor 41, rotating shaft 42, driving gear 43, transmission motor 44, screw rod 45, moving ring 46, intermediate gear 47, fixed gear 48 and shell 49, shell 49 one side is fixedly arranged in steering shaft 3 connecting section 3a, shell 49 one side is provided with driving motor 41, driving motor 41 output end is provided with rotating shaft 42, rotating shaft 42 is arranged through shell 49, and rotating shaft 42 middle position is coaxially provided with driving gear 43, driving gear 43 is provided with transmission motor 44 away from shell 49 one side, transmission motor 44 output end is connected with screw rod 45, screw rod 45 is arranged in the same way with rotating shaft 42, and moving ring 46 is coaxially arranged on screw rod 45, moving ring 46 one side is connected with intermediate gear 47, intermediate gear 47 is adjacent to steering shaft 3, and coaxial gear is arranged on steering shaft 3, intermediate gear 47 is engaged with fixed gear 48.

[0023] Specifically, moving ring 46 one side is provided with connecting rod 461, connecting rod 461 is connected with rotating ring 462 away from moving ring 46 one side, and intermediate gear 47 is rotatably connected with rotating ring 462.

[0024] Specifically, transmission device 6 includes output shaft 61, rotating lead screw 62, transmission cover 63 and transmission gear 64, output shaft 61 is connected with transmission section 3b, and output shaft 61 is connected with transmission section 3b through universal joint 5, output shaft 61 is coaxially provided with transmission gear 64 in the end away from transmission section 3b, and transmission gear 64 is provided with rotating lead screw 62 below, rotating lead screw 62 both ends are respectively connected with rotating drag link, and rotating lead screw 62 is engaged with transmission gear 64, transmission cover 63 is arranged above rotating lead screw 62, and the length of transmission cover 63 is greater than the length of rotating lead screw 62.

[0025] Specifically, a dust cover 71 is arranged at the connection position of the rotating pull rod and the rotating screw rod 62, which is used to prevent dust and gravel on the road from entering the connection position of the rotating pull rod and the rotating screw rod 62 during the driving of the vehicle.

[0026] Specifically, the intermediate gear 47 is divided into a large gear 471 and a small gear 472, and the large gear 471 and the small gear 472 are coaxially arranged, and the transmission ratio of the large gear 471 and the small gear 472 is 1:2.

[0027] Working principle: when the driver needs to turn the vehicle, the speed sensor detects the speed of the vehicle, and when the speed of the vehicle is higher than the limit value, the driving motor 41 rotates to drive the rotating shaft 42 to rotate, the rotating shaft 42 is engaged with the driving gear 43, and the rotating shaft 42 drives the driving gear 43 to rotate. Since the speed of the vehicle is higher than the limit value, the transmission motor 44 drives the screw rod 45 to rotate, the screw rod 45 drives the moving ring 46 to move on the screw rod 45, the moving ring 46 drives the connecting rod 461 to make the small gear 472 engage with the driving gear 43 and the fixed gear 48. Since the large gear 471 and the small gear 472 are connected on the rotating ring 462, the driving gear 43 drives the small gear 472 to rotate, the small gear 472 drives the fixed gear 48 to rotate, and the fixed gear 48 drives the steering shaft 3 to rotate. The steering shaft 3 drives the output shaft 61 to rotate through the universal joint 5, the output shaft 61 drives the transmission gear 64 to rotate, the transmission gear 64 is engaged with the rotating screw rod 62, and the rotating screw rod 62 moves left and right, so that the steering pull rod 7 on both sides of the rotating screw rod 62 drives the wheel 8 to turn. Since the transmission ratio of the large gear 471 and the small gear 472 is 1:2, when the vehicle speed is high, the driving gear 43 drives the small gear 472 to rotate, and the driving gear 43 drives the large gear 471 to rotate. The driver needs more force to turn, so as to avoid the problem that when the vehicle speed is high, the driver turns the steering wheel 2 with the same force, which causes the vehicle to turn at a large angle and the vehicle to deviate greatly, thereby greatly increasing the risk of vehicle rollover. When the vehicle speed is slow, the driver only needs to turn the steering wheel 2 slightly, the transmission motor 44 drives the large gear 471 to engage with the driving gear 43, the driving gear 43 drives the large gear 471 to make the fixed gear 48 drive the steering shaft 3 to rotate, so that the wheel 8 rotates at the same amplitude, thereby saving the driver's effort to turn the steering wheel 2 and improving the driving comfort.

[0028] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, the made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A car steering wheel power steering structure, comprising a body (1), characterized in that: The body (1) is provided with a steering wheel (2), the steering wheel (2) is circular, and a steering shaft (3) is connected to the center of the circumference of the steering wheel (2), and a power assist assembly (4) is provided at the middle of the steering shaft (3). The steering shaft (3) is divided into two sections, and the steering shaft (3) is divided into a connecting section (3a) and a transmission section (3b). One end of the connecting section (3a) is connected to the center of the steering wheel (2), and the other end of the connecting section (3a) is connected to a universal joint (5). Both ends of the transmission section (3b) are connected to universal joints (5). The connecting section (3a) and the transmission section (3b) are connected via the universal joint (5). The transmission section (3b) is connected to a transmission device (6) at one end away from the connection section (3a). The transmission device (6) is connected to the transmission section (3b) of the steering shaft (3) through the same universal joint (5). Steering rods (7) are connected to both ends of the transmission device (6). The steering rods (7) are both connected to wheels (8). A speed sensor is connected to one side of the power assist assembly (4). The speed sensor is used to detect the vehicle speed. When the vehicle is turning at a faster speed, the power assist assembly (4) provides a smaller power assist to the steering shaft (3). When the vehicle is turning at a slower speed, the power assist assembly (4) provides a larger power assist to the steering shaft (3).

2. The automobile steering wheel power steering structure according to claim 1, characterized in that: The power assist assembly (4) comprises a driving motor (41), a rotating shaft (42), a driving gear (43), a transmission motor (44), a screw rod (45), a moving ring (46), an intermediate gear (47), a fixed gear (48) and a housing (49). One side of the housing (49) is fixedly arranged on the connecting section (3a) of the steering shaft (3). One side of the housing (49) is provided with a driving motor (41). The output end of the driving motor (41) is provided with a rotating shaft (42). The rotating shaft (42) is provided through the housing (49) and the middle position of the rotating shaft (42) is coaxially arranged. A driving gear (43) is provided. A transmission motor (44) is provided on the side of the driving gear (43) away from the housing (49). The output end of the transmission motor (44) is connected to a screw rod (45). The screw rod (45) is provided in the same manner as the rotating shaft (42). A moving ring (46) is coaxially provided on the screw rod (45). One side of the moving ring (46) is connected to an intermediate gear (47). The intermediate gear (47) is adjacent to the steering shaft (3). A coaxial gear is provided on the steering shaft (3). The intermediate gear (47) is meshed with a fixed gear (48).

3. The automobile steering wheel power steering structure according to claim 2, characterized in that: A connecting rod (461) is provided on one side of the moving ring (46), and the connecting rod (461) is connected to a rotating ring (462) on a side away from the moving ring (46), and the intermediate gear (47) is rotatably connected to the rotating ring (462).

4. The automobile steering wheel power steering structure according to claim 1, characterized in that: The transmission device (6) comprises an output shaft (61), a rotating screw rod (62), a transmission cover (63) and a transmission gear (64); the output shaft (61) is connected to the transmission section (3b), and the output shaft (61) and the transmission section (3b) are connected via a universal joint (5); a transmission gear (64) is coaxially arranged at one end of the output shaft (61) away from the transmission section (3b), and a rotating screw rod (62) is arranged below the transmission gear (64); two sections of the rotating screw rod (62) are respectively connected to the rotating pull rod, and the rotating screw rod (62) is meshed with the transmission gear (64); the transmission cover (63) is arranged above the rotating screw rod (62), and the length of the transmission cover (63) is greater than the length of the rotating screw rod (62).

5. The automobile steering wheel power steering structure according to claim 1, characterized in that: A dust cover (71) is provided at the connection between the rotating pull rod and the rotating screw rod (62). The dust cover (71) is used to prevent dust and gravel on the road from entering the connection between the rotating pull rod and the rotating screw rod (62) during the vehicle's driving.

6. The automobile steering wheel power steering structure according to claim 1, characterized in that: The intermediate gear (47) is divided into a large gear (471) and a small gear (472), and the large gear (471) and the small gear (472) are coaxially arranged, and the transmission ratio of the large gear (471) to the small gear (472) is 1:2.

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