Auxiliary turning device for new energy automobile

Abstract

The utility model relates to a new energy automobile auxiliary turning device which comprises a steering transmission rod, the lower end of the steering transmission rod is connected with a steering angular velocity sensor, the lower end of the steering angular velocity sensor is provided with a gear shaft, the gear shaft is connected with a rack rod in a meshed mode, and the outer side of the gear shaft and the outer side of the steering angular velocity sensor are wrapped with a protective shell. The right side of the rack rod is fixedly connected with a screw, the screw is movably connected with a ball screw transmission mechanism, one side of the ball screw transmission mechanism is connected with a driving motor, the left side of the driving motor is connected with a heat dissipation connecting cavity, the left side of the heat dissipation connecting cavity is connected with an air pipe, and the left side of the air pipe is connected with a protective shell; the overall steering precision is improved through a ball screw transmission mechanism, the rear end of the motor is connected with a heat dissipation cavity, and air flow brought out by a heat dissipation fan of the motor is used for transmitting wind power to a gear shaft and a rack rod in a protection shell through an air pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of steering devices for new energy vehicles, in particular to an auxiliary turning device for new energy vehicles. Background Art

[0002] With the continuous improvement of environmental awareness, new energy vehicles have developed rapidly. At present, new energy vehicles mainly rely on improvements based on traditional fuel vehicles, for example, changing traditional oil drive to electric drive; however, the existing suspension structure still uses a single-arm suspension. Although the single-arm suspension is small in size, its ability to absorb the lateral force of the tire is limited, which reduces the stability when cornering, and makes the space structure at both ends of the electric drive part not fully utilized. At the same time, the existing hydraulic auxiliary steering mechanism has a large volume structure and a slow response speed, which affects the driver's sense of control when steering.

[0003] Patent No. CN201620177109.7 discloses a vehicle turning assist device, which includes a slide rail, a slide rail lifting device and a slide rail lateral shift driving device; the slide rail includes: an upper rail and a lower rail adapted to the upper rail, the upper rail and the lower rail have the freedom to slide along the track direction relative to each other; the lower rail is tightly connected to the slide rail lifting device; the slide rail lateral shift driving device for driving the upper rail to slide relative to the lower rail is tightly connected to the upper rail and the lower rail. By providing a vehicle turning assist device for a truck with a long body, the technical problem in the prior art that a truck with a long body is difficult to adjust the body angle when passing through a narrow curve is effectively solved, but the device has the following problems: first, the steering stability is poor and the steering accuracy is poor; second, the steering mechanism cannot be cooled and dusted during the steering process. Utility Model Content

[0004] The purpose of the utility model is to improve the overall steering accuracy through a ball screw transmission mechanism to solve the technical problems in the prior art, such as low steering accuracy, poor motor heat dissipation effect, and inability of the steering mechanism to dissipate heat and dust, by using the airflow brought out by the cooling fan of the motor to transmit the wind force to the gear shaft and rack rod in the protective shell through the air duct, so as to solve the technical problems in the prior art, such as low steering accuracy, poor motor heat dissipation effect, and inability of the steering mechanism to dissipate heat and dust.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An auxiliary turning device for a new energy vehicle comprises a steering transmission rod, the lower end of which is connected to a steering angular velocity sensor, the lower end of which is provided with a gear shaft, the gear shaft is meshedly connected to a rack rod, and the outer sides of the gear shaft and the steering angular velocity sensor are wrapped with a protective shell;

[0007] A rack rod, the right side of the rack rod is fixedly connected to a screw rod, the screw rod is movably connected to a ball screw transmission mechanism, one side of the ball screw transmission mechanism is connected to a drive motor, the left side of the drive motor is connected to a heat dissipation connection cavity, the left side of the heat dissipation connection cavity is connected to an air duct, and the left side of the air duct is connected to a protective shell.

[0008] As a preferred embodiment, the left end of the rack rod is fixedly connected to a round hole groove block, a round hole groove is provided at the left center position of the round hole groove block, and the left side of the round hole groove block is movably connected to a ball connecting rod block, the right end of the round ball connecting rod block is wrapped with a rubber protective cover on the outside, and the left side of the round ball connecting rod block is fixedly connected to a connecting rod, a round connecting hole is provided at the left end of the connecting rod, and a traction steering rod is connected in the round connecting hole.

[0009] As a preferred embodiment, the right end of the screw is fixedly connected to a No. 2 circular groove block, the right side of the No. 2 circular groove block is movably connected to a No. 2 ball connecting rod block, the outer side of the left end of the No. 2 ball connecting rod block is wrapped with a No. 2 rubber protective sleeve, and the right side of the No. 2 ball connecting rod block is fixedly connected to a No. 2 connecting rod, and a No. 2 circular connecting hole is provided at the right end of the No. 2 connecting rod, and a No. 2 traction steering rod is connected in the No. 2 circular connecting hole.

[0010] As a preferred embodiment, the ball screw transmission mechanism includes a screw nut, a steel ball is provided inside the screw nut, and the screw nut is movably connected to the screw rod, the outer side of the screw nut is connected to a transmission belt, the other side of the transmission belt is connected to a motor output shaft, the motor output shaft is connected to a drive motor, and the outer side of the motor output shaft is wrapped with a fixed protective cover, and the fixed protective cover is fixedly connected to the drive motor.

[0011] Preferably, the heat dissipation connection cavity includes a wrapping cavity, the wrapping cavity is fixedly connected to the drive motor, and a heat dissipation connection hole and a connection hole groove are provided on the left side of the wrapping cavity, the heat dissipation connection hole is connected to the air duct on the left side, and a heat dissipation fan is provided in the heat dissipation connection hole.

[0012] As another preferred embodiment, the air duct is made of elastic rubber material, and the other end of the air duct is connected to a protective shell, a through hole is provided at the lower end of the protective shell where the gear shaft is wrapped, a supporting dust dispersion hole is provided at the lower end of the protective shell, the supporting dust dispersion hole is filled with a dust dispersion block, a shock-absorbing pad is provided at the upper end of the dust dispersion block, and a rack rod is provided at the upper end of the shock-absorbing pad.

[0013] Beneficial effects of the utility model:

[0014] (1) In the utility model, a ball screw transmission mechanism is provided, and the driving motor is used to drive the motor output shaft to rotate, and the motor output shaft drives the transmission belt, and then the transmission belt drives the screw nut to drive the screw to run smoothly left and right. A spiral groove is provided in the screw nut, and a spiral groove is also provided on the screw. The spiral groove in the screw nut matches the spiral groove on the screw to form a cylindrical spiral groove. The spiral groove is filled with steel balls. Because the screw nut is fixed on the fixed protective cover, when the screw nut rotates, it will be squeezed by the steel ball in the middle to drive the screw to move left and right. Then a return cavity is provided inside the screw nut, and the steel ball rolls cyclically through the return cavity. The use of this circulating ball transmission can improve the transmission accuracy and transmission efficiency.

[0015] (2) In the utility model, a heat dissipation connection cavity is provided to dissipate heat for the driving motor. A heat dissipation connection hole is provided on the wrapping cavity. A heat dissipation connection hole is placed in the heat dissipation connection hole. The heat dissipation fan drives wind into the air duct. The air duct blows the wind into the position of the gear shaft and the rack rod, and blows away excess heat and dust generated at the contact position of the gear shaft and the rack rod. The heat dissipation and dust dispersion effects are significant, thereby improving the overall steering accuracy and extending the service life of the entire motor-driven steering structure.

[0016] In summary, the equipment has the advantages of high steering accuracy, good heat dissipation effect, long service life and outstanding dust dispersion ability, and is particularly suitable for the technical field of steering devices for new energy vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 It is a structural schematic diagram of the gear shaft in the utility model.

[0020] Figure 3 It is a structural schematic diagram of the screw in the utility model.

[0021] Figure 4 It is a schematic diagram of the structure of the dust dissipation hole supported in the utility model. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present utility model are clearly and completely described below in conjunction with the accompanying drawings.

[0023] Embodiment 1

[0024] like Figures 1 to 4 As shown, the utility model provides a new energy vehicle auxiliary turning device, including a steering transmission rod 1, the lower end of the steering transmission rod 1 is connected to a steering angular velocity sensor 2, the lower end of the steering angular velocity sensor 2 is provided with a gear shaft 3, the gear shaft 3 is meshed and connected to a rack rod 4, and the outer sides of the gear shaft 3 and the steering angular velocity sensor 2 are wrapped with a protective shell 5;

[0025] A rack rod 4, wherein the right side of the rack rod 4 is fixedly connected to a screw rod 6, wherein the screw rod 6 is movably connected to a ball screw transmission mechanism 7, wherein one side of the ball screw transmission mechanism 7 is connected to a drive motor 8, wherein the left side of the drive motor 8 is connected to a heat dissipation connection cavity 9, wherein the left side of the heat dissipation connection cavity 9 is connected to an air duct 10, and the left side of the air duct 10 is connected to a protective shell 5.

[0026] Furthermore, the left end of the rack rod 4 is fixedly connected to the round hole groove block 41, a round hole groove is provided at the left center position of the round hole groove block 41, and the left side of the round hole groove block 41 is movably connected to the ball connecting rod block 42, the right end of the ball connecting rod block 42 is wrapped with a rubber protective cover 43 on the outside, and the left side of the ball connecting rod block 42 is fixedly connected to the connecting rod 44, and the left end of the connecting rod 44 is provided with a round connecting hole 45, and the traction steering rod 46 is connected in the round connecting hole 45. The round hole groove block 41 and the round hole groove are for convenient connection of the ball connecting rod block 42, the ball connecting block 42 is for convenient connection of the connecting rod 44 and the traction steering rod 46, and the traction steering rod 46 is for connecting the tire, so that when the rack rod 4 moves left and right, the traction steering rod 46 can be used to drive the tire to steer. The structural principle is simple, and the rubber protective cover 43 is provided to facilitate the protection of the position of the round hole groove block 41 to prevent excess dust from entering the round hole groove and affecting the steering of the tire.

[0027] Furthermore, the right end of the screw rod 6 is fixedly connected to a No. 2 circular groove block 61, and the right side of the No. 2 circular groove block 61 is movably connected to a No. 2 ball connecting rod block 62, the outer side of the left end of the No. 2 ball connecting rod block 62 is wrapped with a No. 2 rubber protective cover 63, and the right side of the No. 2 ball connecting rod block 62 is fixedly connected to a No. 2 connecting rod 64, and a No. 2 circular connecting hole 65 is provided at the right end of the No. 2 connecting rod 64, and a No. 2 traction steering rod 66 is connected in the No. 2 circular connecting hole 65. The No. 2 circular groove block 61 is for facilitating the steering control of the tire on the other side.

[0028] Further, the ball screw transmission mechanism 7 includes a screw nut 71, a steel ball is arranged inside the screw nut 71, and the screw nut 71 is movably connected to the screw rod 6, the outer side of the screw nut 71 is connected to a transmission belt 72, and the other side of the transmission belt 72 is connected to a motor output shaft 81, the motor output shaft 81 is connected to the drive motor 8, and the outer side of the motor output shaft 81 is wrapped with a fixed protective cover 82, and the fixed protective cover 82 is fixedly connected to the drive motor 8. When the drive motor 8 starts to work, it drives the transmission belt 72 to rotate, and the transmission belt 72 drives the screw nut 71 to rotate. A spiral groove is arranged inside the screw nut, and a spiral groove is also arranged on the screw rod 6. The spiral groove in the screw nut 71 matches the spiral groove of the screw rod to form a cylindrical spiral groove, and the spiral groove is filled with steel balls. When the screw nut 71 rotates, the screw rod 6 is driven to move left and right through the squeezing of the steel ball in the middle, and a return pipe is arranged inside the screw nut 71, and the steel ball rolls cyclically through the return pipe. The use of this circulating ball transmission ensures high transmission accuracy and high transmission efficiency, simple structural principle, and strong practicality.

[0029] Furthermore, the heat dissipation connection cavity 9 includes a wrapping cavity 91, which is fixedly connected to the drive motor 8, and a heat dissipation connection hole 92 and a connection hole groove 93 are provided on the left side of the wrapping cavity 91, and the heat dissipation connection hole 92 is connected to the air duct 10 on the left side, and a heat dissipation fan is provided in the heat dissipation connection hole 92. The heat dissipation connection hole 92 is mainly for the convenience of heat dissipation of the drive motor 8. Then a heat dissipation fan is placed in the heat dissipation connection hole 92, which can not only be used to dissipate heat for the drive motor 8, but also can drive the airflow into the air duct 10, so that the airflow in the air duct 10 enters the protective shell 5, and enters the contact connection position of the gear shaft 3 and the rack rod 4 through the protective shell 5, so that the connection position of the gear shaft 3 and the rack rod 4 is more convenient to clean, reduce the influence of dust on the connection and meshing between the two, improve the rotation accuracy, and extend the service life.

[0030] Furthermore, the air duct 10 is made of elastic rubber material, and the other end of the air duct 10 is connected to the protective shell 5. The lower end of the protective shell 5 is provided with a through hole 11 at the position wrapping the gear shaft 3. The lower end of the protective shell 5 is provided with a supporting dust-collecting hole 12. The supporting dust-collecting hole 12 is filled with a dust-collecting block 13. The upper end of the dust-collecting block 13 is provided with a shock-absorbing pad, and the upper end of the shock-absorbing pad is provided with a rack rod 4. The elastic rubber material of the air duct can ensure higher flexibility during placement, and the dust-collecting block 13 is for facilitating dust collection at the connection position of the gear shaft 3 and the rack rod 4 to ensure higher precision.

[0031] Working process: First, the steering transmission rod 1 is connected to the steering wheel of the car. The steering transmission rod 1, the rotation angle is controlled by the steering angular velocity sensor 2 for angle speed control and signal transmission, and then the gear shaft 3 is driven to rotate, the gear shaft 3 is meshed with the rack rod 4, the gear shaft 3 drives the rack rod 4 to move left and right, and then the motor 8 is driven to work during the left and right movement of the rack rod 4, which can drive the ball screw transmission mechanism 7 to have higher transmission distance accuracy and higher transmission efficiency;

[0032] It is worth mentioning that a large amount of heat will be generated during the operation of the driving motor 8, and the heat dissipation connection cavity 9 is used for heat dissipation. When the cooling fan is powered on and starts working, a large amount of heat will be taken away. During the operation of the cooling fan, the airflow enters the protective shell 5 through the air duct 10, and enters the through hole 11 through the protective shell 5. Then, a supporting dust dispersion hole 12 is set at the lower end of the through hole 11. The dust dispersion block 13 can not only support the rack rod 4, but also facilitate the dust to be blown off from the protective shell 5, thereby ensuring that the connection between the gear shaft 3 and the rack rod 4 is tighter and the transmission accuracy is higher.

[0033] In the description of the present invention, it should be understood that the terms "front and back", "left and right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the equipment or components referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the utility model.

[0034] Of course, in the present technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0035] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art under the technical guidance of the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A new energy vehicle auxiliary turning device, characterized in that: include A steering transmission rod (1), wherein the lower end of the steering transmission rod (1) is connected to a steering angular velocity sensor (2), a gear shaft (3) is provided at the lower end of the steering angular velocity sensor (2), the gear shaft (3) is meshingly connected to a rack rod (4), and the outer sides of the gear shaft (3) and the steering angular velocity sensor (2) are wrapped with a protective shell (5); A rack rod (4), the right side of the rack rod (4) is fixedly connected to a screw rod (6), the screw rod (6) is movably connected to a ball screw transmission mechanism (7), one side of the ball screw transmission mechanism (7) is connected to a drive motor (8), the left side of the drive motor (8) is connected to a heat dissipation connection cavity (9), the left side of the heat dissipation connection cavity (9) is connected to an air duct (10), and the left side of the air duct (10) is connected to a protective shell (5).

2. The new energy vehicle auxiliary turning device according to claim 1, characterized in that: The left end of the rack rod (4) is fixedly connected to a round hole groove block (41), a round hole groove is provided at the left center of the round hole groove block (41), and the left side of the round hole groove block (41) is movably connected to a round ball connecting rod block (42), the right end of the round ball connecting rod block (42) is wrapped with a rubber protective sleeve (43), and the left side of the round ball connecting rod block (42) is fixedly connected to a connecting rod (44), a round connecting hole (45) is provided at the left end of the connecting rod (44), and a traction steering rod (46) is connected inside the round connecting hole (45).

3. The new energy vehicle auxiliary turning device according to claim 1, characterized in that: The right end of the screw rod (6) is fixedly connected to a No. 2 circular groove block (61), the right side of the No. 2 circular groove block (61) is movably connected to a No. 2 ball connecting rod block (62), the left end of the No. 2 ball connecting rod block (62) is wrapped and connected to a No. 2 rubber protective sleeve (63), and the right side of the No. 2 ball connecting rod block (62) is fixedly connected to a No. 2 connecting rod (64), the right end of the No. 2 connecting rod (64) is provided with a No. 2 circular connecting hole (65), and the No. 2 circular connecting hole (65) is connected to a No. 2 traction steering rod (66).

4. The new energy vehicle auxiliary turning device according to claim 1, characterized in that: The ball screw transmission mechanism (7) comprises a screw nut (71), a steel ball is arranged inside the screw nut (71), and the screw nut (71) is movably connected to the screw rod (6), the outer side of the screw nut (71) is connected to a transmission belt (72), the other side of the transmission belt (72) is connected to a motor output shaft (81), the motor output shaft (81) is connected to a drive motor (8), and the outer side of the motor output shaft (81) is wrapped with a fixed protective cover (82), and the fixed protective cover (82) is fixedly connected to the drive motor (8).

5. The new energy vehicle auxiliary turning device according to claim 1, characterized in that: The heat dissipation connection cavity (9) comprises a wrapping cavity (91), the wrapping cavity (91) is fixedly connected to the drive motor (8), and a heat dissipation connection hole (92) and a connection hole groove (93) are provided on the left side of the wrapping cavity (91), the heat dissipation connection hole (92) is connected to the air duct (10) on the left side, and a heat dissipation fan is provided in the heat dissipation connection hole (92).

6. The new energy vehicle auxiliary turning device according to claim 1, characterized in that: The air duct (10) is made of elastic rubber material, and the other end of the air duct (10) is connected to the protective shell (5). The lower end of the protective shell (5) is provided with a through hole (11) at a position where the gear shaft (3) is wrapped. The lower end of the protective shell (5) is provided with a supporting dust-dispersing hole (12). The supporting dust-dispersing hole (12) is filled with a dust-dispersing block (13). The upper end of the dust-dispersing block (13) is provided with a shock-absorbing pad, and the upper end of the shock-absorbing pad is provided with a rack rod (4).

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