A new energy vehicle power steering device

Abstract

The present invention belongs to the technical field related to new energy vehicles, and specifically relates to a steering assist device for new energy vehicles, which includes a housing, a driven rack, a transmission gear, a power-assisting motor, a transmission disc, a driven disc, a coupling rubber tube, a fixed side plate, and a rotating side plate. In the process of pulling the transmission gear, the pull disc drives the transmission gear to move through a connecting rod, and the transmission gear rotates at this time. Since the rotating side plate and the driven disc are slidably connected through a slider and an annular groove, the self-rotation of the transmission gear does not drive the coupling rubber tube to twist, and the coupling rubber tube is only squeezed by the rotating side plate and the fixed side plate, thereby ensuring the recovery ability of the coupling rubber tube; as the transmission gear rotates, the fixed teeth on the driven disc mesh with the fixed teeth on the transmission disc, and the torsional force of the rotation of the power-assisting motor is transmitted to the transmission gear through the fixed teeth and the moving teeth, without being transmitted through the coupling rubber tube, thereby ensuring the shape characteristics of the coupling rubber tube during the transmission of the power-assisting motor and the transmission gear.

Description

Technical Field

[0001] The present invention belongs to the technical field related to new energy vehicles, and specifically relates to a steering assist device for a new energy vehicle. Background Art

[0002] Car power steering increases external force to resist steering resistance, allowing the driver to complete steering with less force. It is also called power steering. It makes driving simpler and easier, and makes the vehicle more responsive, thus improving safety to a certain extent.

[0003] Traditional electric power steering is achieved through the coordination between gears and racks. However, in actual application, due to the hard contact between the gears and racks, there is no buffer in the rigid connection when encountering bumpy roads, which causes damage to the connection between the motor shaft and the gear, affecting the normal power steering function. Although there are a few that use torsion springs to connect the gears and shafts, during the electric power steering process, the torsion springs must be rotated to the maximum limit before the gears can be driven to rotate. Although the buffer is reduced, the motor drives the rack to move relatively slowly, which increases the action time of the power steering and poses certain safety hazards.

[0004] The applicant has retrieved some prior arts, such as patent publication number CN221316353U, which mainly connects the steering gear and the rotating shaft of the power-assisted motor flexibly through a coupling rubber tube. At the same time, a power-assisted rod is added to the coupling rubber tube. When the power-assisted motor needs to start steering, the magnetic force generated by the coil will pull the transmission plate to force the power-assisted rod to be completely connected to the inside of the coupling rubber tube, thereby increasing the torque of the coupling rubber tube. Considering the smoothness of the motor power-assisted steering process, the steering motor and the gear are often meshed with helical teeth, which results in the above-mentioned scheme that in the process of pulling the gear, the gear will rotate and drive the coupling rubber tube to twist. When the motor and the gear are connected through the coupling rubber tube, the coupling rubber tube is under pressure. At this time, the coupling rubber tube is in a state of torsional compression, so the rubber tube is extremely easy to shear and deform. Summary of the invention

[0005] The purpose of the present invention is to provide a new energy vehicle steering assist device to solve the technical problems in the prior art in view of the deficiencies in the prior art.

[0006] The purpose of the present invention can be achieved by the following technical solutions: a new energy vehicle power steering device, comprising a housing and a driven rack, the driven rack runs through the housing and meshes with a transmission gear, a power-assisting motor is installed inside the housing, the output end of the power-assisting motor is fixedly connected to a transmission plate through a transmission shaft, a driven plate is coaxially fixedly installed on the transmission gear, a coupling rubber cylinder is installed between the driven plate and the transmission plate, two ends of the coupling rubber cylinder are respectively connected to a fixed side plate and a rotating side plate, the rotating side plate is rotationally connected to the driven plate, and the fixed side plate is fixedly connected to the transmission plate;

[0007] The driven plate and the transmission plate are respectively machined with movable teeth and fixed teeth, and when the coupling rubber cylinder is pressurized, the fixed teeth and the movable teeth mesh;

[0008] A connecting rod is slidably installed on the rotating side plate, and the connecting rod passes through the fixed side plate and the transmission plate to be connected with the movable pull plate. A fixed plate is installed on the power-assisting motor, and the fixed plate attracts the pull plate to move through the electromagnetic suction cup.

[0009] As a further optimization or improvement of this solution, a connecting ball sleeve is installed on the rotating side plate, a connecting ball head is installed on the connecting rod, the connecting ball head cooperates with the connecting ball sleeve, and the rotating side plate is rotatably connected to the driven disk through an oil injection assembly.

[0010] As a further optimization or improvement of the present solution, the oil injection assembly includes a slider and an annular groove. The slider is installed on the rotating side plate, and an annular groove is opened inside the driven disk. The slider slides in the annular groove.

[0011] As a further optimization or improvement of this solution, the oil injection assembly further includes an oil storage bag, an oil bag groove is provided on the driven disc, an oil storage bag is installed inside the oil bag groove, the oil storage bag is connected to the oil supply pump, a nozzle of the oil storage bag faces the transmission gear, and the slider squeezes the oil storage bag, a setting air hole is provided on the rotating side plate, and a dynamic air hole is provided on the driven disc;

[0012] When the electromagnetic suction cup pulls the rotating side plate and the driven plate through the pulling plate, the coupling rubber cylinder is compressed, and the fixed air hole and the dynamic air hole gradually overlap; when the dynamic teeth and the fixed teeth are engaged, the fixed air hole and the dynamic air hole are staggered.

[0013] As a further optimization or improvement of this solution, the transmission gear includes a sliding area and a transmission area, and the nozzle of the oil storage bag faces the sliding area; in the process of the electromagnetic suction cup pulling the rotating side plate and the transmission gear through the pulling plate, the driven rack gradually engages with the transmission area.

[0014] As a further optimization or improvement of this solution, the coupling rubber cylinder is hollow and made of polyurethane rubber.

[0015] As a further optimization or improvement of this solution, the pull plate is connected to the transmission plate via a return spring.

[0016] Beneficial effects of the present invention:

[0017] (1) When steering is required, the electromagnetic suction cup on the fixed plate attracts the pulling plate, causing the pulling plate to move in the direction of the electromagnetic suction cup. At the same time, the pulling plate drives the rotating side plate and the transmission gear to move synchronously through the connecting rod. At this time, the driven plate and the rotating side plate gradually press the coupling rubber tube. During this process, the helical teeth between the driven rack and the transmission gear are engaged, and the transmission gear rotates while moving. Since the rotating side plate and the driven plate are slidably connected by the slider and the ring groove, the self-rotation of the transmission gear will not cause the coupling rubber tube to twist. The coupling rubber tube is only squeezed by the rotating side plate and the fixed side plate, which ensures the recovery ability of the coupling rubber tube and improves the service life of the coupling rubber tube.

[0018] In the process of pulling the transmission gear, as the transmission gear rotates, the fixed teeth on the driven plate mesh with the fixed teeth on the transmission plate. At this time, the electromagnetic suction cup contacts the pulling plate, and the torsional force during the rotation of the power-assist motor is transmitted to the transmission gear through the fixed teeth on the transmission plate and the movable teeth on the driven plate, without the need to be transmitted through the coupling rubber tube, thereby ensuring the shape characteristics of the coupling rubber tube during the transmission of the power-assist motor and the transmission gear and avoiding shear deformation of the cross section of the coupling rubber tube caused by connecting the power-assist motor and the transmission gear through the coupling rubber tube, thereby damaging the coupling rubber tube.

[0019] (2) When steering is required, the electromagnetic suction cup on the fixed plate attracts the pulling plate, causing the pulling plate to move toward the electromagnetic suction cup. At the same time, the pulling plate drives the rotating side plate and the transmission gear to move synchronously through the connecting rod. During this process, the transmission gear rotates. At this time, the slider on the rotating side plate will slide along the annular groove in the driven plate and squeeze the oil storage bag, so that the oil inside the oil storage bag is sprayed onto the sliding area. As the rotating side plate and the transmission gear move toward the electromagnetic suction cup, the coupling rubber cylinder is gradually squeezed. At the same time, as the transmission gear rotates, the fixed air hole and the dynamic air hole gradually overlap. At this time, the gas inside the coupling rubber cylinder is blown toward the sliding area through the fixed air hole and the fixed air hole, blowing the oil sprayed on the sliding area to the transmission area. During this process, an oil film is formed on the sliding area. The oil film on the sliding area can effectively reduce the friction between the sliding area and the driven rack tooth surface during the pulling process of the transmission gear. When the power-assisted motor drives the transmission gear to rotate, the oil on the transmission area can effectively reduce the wear of the transmission gear and the driven rack.

[0020] Specifically, the present invention controls the amount of oil in the sliding area and the transmission area on the transmission gear by squeezing liquid from the oil storage bag and blowing liquid from the coupling rubber tube, so that an oil film is formed in the sliding area and liquid accumulates on the surface of the transmission area. The oil film on the sliding area reduces the friction between the sliding area and the tooth surface of the driven rack during the pulling of the transmission gear. The liquid accumulation on the surface of the transmission area can effectively reduce the wear of the transmission gear and the driven rack and avoid oil waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 Schematic diagram of the internal structure of the box.

[0024] Figure 3 It is a schematic diagram of the coupling rubber cylinder structure.

[0025] Figure 4 It is an exploded view of the overall structure of the present invention.

[0026] Figure 5 This is the front view of the driven plate and the coupling rubber tube.

[0027] Figure 6 This is the side matching diagram of the driven plate and the coupling rubber tube.

[0028] Figure 7 This is a cross-sectional view of the driven plate and coupling rubber tube structure.

[0029] Figure 8 It is a cross-sectional view of the overall structure of the present invention.

[0030] Fig. 9 It is a schematic diagram of the structure of the sliding area and the transmission area.

[0031] The following are marked in the figure: 1. Box body; 2. Driven rack; 3. Power-assisting motor; 4. Transmission gear; 401. Sliding area; 402. Transmission area; 5. Driven plate; 6. Transmission plate; 7. Transmission shaft; 8. Coupling rubber cylinder; 9. Oil injection assembly; 901. Sliding block; 902. Fixed air hole; 903. Moving air hole; 904. Oil bag groove; 905. Ring groove; 906. Oil storage bag; 10. Pull plate; 11. Fixed plate; 12. Connecting rod; 13. Connecting ball sleeve; 14. Reset spring; 15. Fixed teeth; 16. Moving teeth; 17. Fixed side plate; 18. Rotating side plate; 19. Electromagnetic suction cup; 20. Connecting ball head. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-Figure 7A new energy vehicle power steering device comprises a housing 1 and a driven rack 2, the driven rack 2 penetrates the housing 1 and meshes with a transmission gear 4, a power motor 3 is installed inside the housing 1, the output end of the power motor 3 is fixedly connected to a transmission plate 6 through a transmission shaft 7, a driven plate 5 is coaxially fixedly installed on the transmission gear 4, a coupling rubber cylinder 8 is installed between the driven plate 5 and the transmission plate 6, two ends of the coupling rubber cylinder 8 are respectively connected to a fixed side plate 17 and a rotating side plate 18, the rotating side plate 18 is rotatably connected to the driven plate 5, and the fixed side plate 17 is fixedly connected to the transmission plate 6;

[0034] The driven plate 5 and the transmission plate 6 are respectively machined with movable teeth 16 and fixed teeth 15, and when the coupling rubber tube 8 is pressurized, the fixed teeth 15 and the movable teeth 16 are meshed;

[0035] The connecting rod 12 is slidably mounted on the rotating side plate 18 , and the connecting rod 12 passes through the fixed side plate 17 and the transmission plate 6 to be connected to the movable pull plate 10 . The power assist motor 3 is mounted with a fixed plate 11 , and the fixed plate 11 attracts the pull plate 10 to move via an electromagnetic suction cup 19 .

[0036] Specifically, the coupling rubber tube 8 is hollow and is made of polyurethane rubber.

[0037] It should be noted that, considering the smoothness of the steering equipment during operation, its internal transmission structure mostly adopts helical gear meshing. When the coupling rubber tube 8 is subjected to pressure, its internal stress distribution is relatively uniform, and the coupling rubber tube 8 has a strong recovery ability; when the coupling rubber tube 8 is subjected to torsional force, its internal stress distribution presents an obvious gradient feature, and the internal stress distribution of the coupling rubber tube 8 is uneven. Torsional force will cause shear deformation of the cross section of the coupling rubber tube 8, making the coupling rubber tube 8 more prone to local stress concentration when subjected to torsional load, resulting in a greatly reduced recovery ability of the coupling rubber tube 8 and a reduced service life.

[0038] When in use, under normal conditions, the transmission gear 4 and the transmission shaft 7 are connected by a coupling rubber tube 8 for buffering, ensuring that the transmission gear 4 and the transmission shaft 7 have a certain buffering capacity; when steering is required, the electromagnetic suction cup 19 on the fixed disk 11 attracts the pull disk 10, causing the pull disk 10 to move in the direction of the electromagnetic suction cup 19, and at the same time, the pull disk 10 drives the rotating side plate 18 and the transmission gear 4 to move synchronously through the connecting rod 12. At this time, the driven disk 5 and the rotating side plate 18 gradually press the coupling rubber tube 8. In this process, the helical teeth between the driven rack 2 and the transmission gear 4 are meshed, and the transmission gear 4 rotates while moving. Since the rotating side plate 18 and the driven disk 5 are slidably connected by the slider 901 and the annular groove 905, the self-rotation of the transmission gear 4 will not drive the coupling rubber tube 8 to twist, and the coupling rubber tube 8 is only squeezed by the rotating side plate 18 and the fixed side plate 17, ensuring the recovery ability of the coupling rubber tube 8 and improving the service life of the coupling rubber tube 8;

[0039] In the process of pulling the transmission gear 4, as the transmission gear 4 rotates, the fixed teeth 15 on the driven disk 5 mesh with the fixed teeth 15 on the transmission disk 6. At this time, the electromagnetic suction cup 19 contacts the pulling disk 10, and the torsional force during the rotation of the power-assisting motor 3 is transmitted to the transmission gear 4 through the fixed teeth 15 on the transmission disk 6 and the movable teeth 16 on the driven disk 5, without the need to be transmitted through the coupling rubber tube 8, thereby ensuring the shape characteristics of the coupling rubber tube 8 during the transmission process of the power-assisting motor 3 and the transmission gear 4, and avoiding the shear deformation of the cross section of the coupling rubber tube 8 caused by connecting the power-assisting motor 3 and the transmission gear 4 through the coupling rubber tube 8, thereby damaging the coupling rubber tube 8.

[0040] See also Figure 8 The rotating side plate 18 is provided with a connecting ball sleeve 13, and the connecting rod 12 is provided with a connecting ball head 20, the connecting ball head 20 cooperates with the connecting ball sleeve 13, and the rotating side plate 18 is rotatably connected with the driven disc 5 through the oil injection assembly 9.

[0041] It should be noted that, under normal conditions, when the transmission gear 4 vibrates due to passing over a bumpy road, the coupling rubber tube 8 can effectively buffer the connection between the transmission gear 4 and the power-assisted motor 3. When the degree of bumps is large or the automobile shock absorption system is damaged, the transmission gear 4 will shake, causing the coupling rubber tube 8 to twist severely. In order to prevent the coupling rubber tube 8 from being damaged due to the shaking of the transmission gear 4, the rotating side plate 18 and the pull plate 10 in the present invention are connected through the matching of the connecting ball sleeve 13 and the connecting ball head 20. When the coupling rubber tube 8 twists and deforms, the connecting rod 12 flexibly cooperates with the twisting of the coupling rubber tube 8 and provides supporting strength for the coupling rubber tube 8.

[0042] See also Figure 5-Figure 8 The oil injection assembly 9 also includes an oil storage bag 906, an oil bag groove 904 is provided on the driven plate 5, an oil storage bag 906 is installed inside the oil bag groove 904, the oil storage bag 906 is connected to the oil supply pump, the nozzle of the oil storage bag 906 faces the transmission gear 4, and the slider 901 squeezes the oil storage bag 906, the rotating side plate 18 is provided with a set air hole 902, and the driven plate 5 is provided with a dynamic air hole 903;

[0043] When the electromagnetic suction cup 19 pulls the rotating side plate 18 and the driven plate 5 through the pulling plate 10, the coupling rubber tube 8 is compressed, and the fixed air hole 902 and the dynamic air hole 903 gradually overlap; when the dynamic teeth 16 and the fixed teeth 15 are engaged, the fixed air hole 902 and the dynamic air hole 903 are staggered.

[0044] Specifically, the oil injection assembly 9 includes a slider 901 and an annular groove 905 . The slider 901 is installed on the rotating side plate 18 . The annular groove 905 is provided inside the driven plate 5 . The slider 901 slides in the annular groove 905 .

[0045] It should be noted that a baffle is installed at one end of the transmission gear 4 close to the transmission area 402 .

[0046] In actual use, when the transmission gear 4 is pulled, the tooth surface wear on the transmission gear 4 and the driven rack 2 is aggravated, which easily causes the teeth of the transmission gear 4 to be worn flat. Therefore, it is necessary to add an oil spray nozzle in the steering device. The existing oil spray nozzle mainly sprays oil to the transmission gear 4 according to the operation of the power motor 3, and the oil spray amount is fixed. Since the sliding area 401 and the transmission area 402 on the transmission gear 4 have different working purposes, the meshing transmission between the sliding area 401 and the driven rack 2 only occurs when the transmission gear 4 moves, and the transmission between the driven rack 2 and the transmission gear 4 mainly depends on the meshing of the driven rack 2 and the transmission area 402. Therefore, the amount of oil used in the sliding area 401 is less, and the amount of oil in the transmission area 402 is more. The oil spray nozzle of the prior art cannot realize the control of the oil spray amount of the sliding area 401 and the transmission area 402.

[0047] In order to solve the above problem, when steering is required, the electromagnetic suction cup 19 on the fixed plate 11 attracts the pulling plate 10, so that the pulling plate 10 moves toward the direction of the electromagnetic suction cup 19, and at the same time, the pulling plate 10 drives the rotating side plate 18 and the transmission gear 4 to move synchronously through the connecting rod 12. In this process, due to the helical meshing between the driven rack 2 and the transmission gear 4, the transmission gear 4 rotates while moving. At this time, the slider 901 on the rotating side plate 18 slides along the annular groove 905 in the driven plate 5 and squeezes the oil storage bag 906, so that the oil in the oil storage bag 906 is sprayed onto the sliding area 401. As the rotating side plate 18 and the transmission gear 4 move toward the direction of the electromagnetic suction cup 19, the coupling rubber cylinder 8 is gradually squeezed. The moving gear 4 rotates, and the fixed air hole 902 and the moving air hole 903 gradually overlap. At this time, the gas inside the coupling rubber tube 8 is blown to the sliding area 401 through the fixed air hole 902 and the fixed air hole 903, and the oil sprayed on the sliding area 401 is blown to the transmission area 402. In this process, an oil film is formed on the sliding area 401. The oil film on the sliding area 401 can effectively reduce the friction between the tooth surfaces of the sliding area 401 and the driven rack 2 in the process of pulling the transmission gear 4. The oil blown onto the transmission area 402 is blocked by the baffle on the transmission gear 4 to prevent the oil from being blown out of the transmission gear 4. When the power-assisted motor 3 drives the transmission gear 4 to rotate, the oil on the transmission area 402 can effectively reduce the wear of the transmission gear 4 and the driven rack 2.

[0048] The present invention controls the amount of oil in the sliding area 401 and the transmission area 402 on the transmission gear 4 by squeezing liquid from the oil storage bag 906 and blowing liquid from the coupling rubber tube 8, so that an oil film is formed in the sliding area 401 and liquid accumulates on the surface of the transmission area 402. The oil film on the sliding area 401 reduces the friction between the tooth surfaces of the sliding area 401 and the driven rack 2 during the pulling process of the transmission gear 4. The liquid accumulation on the surface of the transmission area 402 can effectively reduce the wear of the transmission gear 4 and the driven rack 2 and avoid oil waste.

[0049] See also Figure 7-Figure 9 The transmission gear 4 includes a sliding area 401 and a transmission area 402, and the nozzle of the oil storage bag 906 faces the sliding area 401; when the electromagnetic suction cup 19 pulls the rotating side plate 18 and the transmission gear 4 through the pulling plate 10, the driven rack 2 gradually engages with the transmission area 402.

[0050] It should be noted that the transmission gear 4 rotates when moving. At this time, the slider 901 on the rotating side plate 18 will slide along the annular groove 905 in the driven disk 5 and squeeze the oil storage bag 906, so that the oil inside the oil storage bag 906 is sprayed onto the sliding area 401. As the rotating side plate 18 and the transmission gear 4 move toward the electromagnetic suction cup 19, the coupling rubber tube 8 is gradually squeezed. At the same time, as the transmission gear 4 rotates, the fixed air hole 902 and the dynamic air hole 903 gradually overlap. At this time, the internal gas of the coupling rubber tube 8 is blown toward the sliding area 401 through the fixed air hole 902 and the fixed air hole 902, and the oil sprayed on the sliding area 401 is blown to the transmission area 402.

[0051] See also Figure 8 , the pull plate 10 is connected to the transmission plate 6 through the return spring 14. It should be noted that when the booster motor 3 finishes working, the electromagnetic suction cup 19 is closed, and the pull plate 10 is reset under the action of the return spring 14.

[0052] The implementation principle of the present invention is:

[0053] Under normal conditions, the transmission gear 4 and the transmission shaft 7 are connected by a coupling rubber tube 8 for buffering, ensuring that the transmission gear 4 and the transmission shaft 7 have a certain buffering capacity; when steering is required, the electromagnetic suction cup 19 on the fixed plate 11 attracts the pull plate 10, causing the pull plate 10 to move in the direction of the electromagnetic suction cup 19, and at the same time, the pull plate 10 drives the rotating side plate 18 and the transmission gear 4 to move synchronously through the connecting rod 12. At this time, the driven plate 5 and the rotating side plate 18 gradually press the coupling rubber tube 8. In this process, the helical teeth between the driven rack 2 and the transmission gear 4 are meshed, and the transmission gear 4 rotates while moving. At this time, the slider 901 on the rotating side plate 18 slides along the annular groove 905 in the driven plate 5 and squeezes the oil storage bag 906, so that the oil inside the oil storage bag 906 is sprayed onto the sliding area 401. As the rotating side plate 18 and the transmission gear The wheel 4 moves toward the electromagnetic suction cup 19, and the coupling rubber cylinder 8 is gradually squeezed. At the same time, as the transmission gear 4 rotates, the fixed air hole 902 and the dynamic air hole 903 gradually overlap. At this time, the gas inside the coupling rubber cylinder 8 is blown to the sliding area 401 through the fixed air hole 902 and the fixed air hole 903, and the oil sprayed on the sliding area 401 is blown to the transmission area 402. In this process, an oil film is formed on the sliding area 401. The oil film on the sliding area 401 can effectively reduce the friction between the tooth surfaces of the sliding area 401 and the driven rack 2 in the process of pulling the transmission gear 4. The oil blown onto the transmission area 402 is blocked by the baffle on the transmission gear 4 to prevent the oil from being blown out of the transmission gear 4. When the power-assisted motor 3 drives the transmission gear 4 to rotate, the oil on the transmission area 402 can effectively reduce the wear of the transmission gear 4 and the driven rack 2.

[0054] During the self-rotation of the transmission gear 4, since the rotating side plate 18 and the driven disk 5 are slidably connected through the slider 901 and the annular groove 905, the self-rotation of the transmission gear 4 will not cause the coupling rubber tube 8 to twist. The coupling rubber tube 8 is only squeezed by the rotating side plate 18 and the fixed side plate 17, thereby ensuring the recovery ability of the coupling rubber tube 8 and improving the service life of the coupling rubber tube 8; during the pulling process of the transmission gear 4, as the transmission gear 4 rotates, the fixed teeth 15 on the driven disk 5 mesh with the fixed teeth 15 on the transmission disk 6. At this time, the electromagnetic suction cup 19 contacts the pulling disk 10. The torsional force during the rotation of the power-assisting motor 3 is transmitted to the transmission gear 4 through the fixed teeth 15 on the transmission disk 6 and the movable teeth 16 on the driven disk 5, without being transmitted through the coupling rubber tube 8, thereby ensuring the shape characteristics of the coupling rubber tube 8 during the transmission process of the power-assisting motor 3 and the transmission gear 4, and avoiding the shear deformation of the cross section of the coupling rubber tube 8 caused by connecting the power-assisting motor 3 and the transmission gear 4 through the coupling rubber tube 8, thereby damaging the coupling rubber tube 8.

[0055] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A power steering device for a new energy vehicle, characterized in that: The invention comprises a housing (1) and a driven rack (2), wherein the driven rack (2) penetrates the housing (1) and meshes with a transmission gear (4), a booster motor (3) is installed inside the housing (1), an output end of the booster motor (3) is fixedly connected to a transmission disc (6) via a transmission shaft (7), a driven disc (5) is coaxially fixedly installed on the transmission gear (4), a coupling rubber cylinder (8) is installed between the driven disc (5) and the transmission disc (6), two ends of the coupling rubber cylinder (8) are respectively connected to a fixed side plate (17) and a rotating side plate (18), the rotating side plate (18) is rotationally connected to the driven disc (5), and the fixed side plate (17) is fixedly connected to the transmission disc (6); The driven plate (5) and the transmission plate (6) are respectively machined with movable teeth (16) and fixed teeth (15), and when the coupling rubber cylinder (8) is pressurized, the fixed teeth (15) and the movable teeth (16) mesh; A connecting rod (12) is slidably mounted on the rotating side plate (18), and the connecting rod (12) passes through the fixed side plate (17) and the transmission plate (6) to be connected to the movable pull plate (10). A fixed plate (11) is mounted on the power assist motor (3), and the fixed plate (11) attracts the pull plate (10) to move via an electromagnetic suction cup (19).

2. A new energy vehicle power steering device according to claim 1, characterized in that: A connecting ball sleeve (13) is installed on the rotating side plate (18), a connecting ball head (20) is installed on the connecting rod (12), the connecting ball head (20) cooperates with the connecting ball sleeve (13), and the rotating side plate (18) is rotatably connected to the driven disk (5) via an oil injection assembly (9).

3. A new energy vehicle power steering device according to claim 2, characterized in that: The oil injection assembly (9) comprises a slider (901) and an annular groove (905). The slider (901) is mounted on the rotating side plate (18). The annular groove (905) is provided inside the driven disk (5). The slider (901) slides in the annular groove (905).

4. A new energy vehicle power steering device according to claim 3, characterized in that: The oil injection assembly (9) further comprises an oil storage bag (906), an oil bag groove (904) is provided on the driven disk (5), an oil storage bag (906) is installed inside the oil bag groove (904), the oil storage bag (906) is connected to the oil supply pump, a nozzle of the oil storage bag (906) faces the transmission gear (4), and the slider (901) squeezes the oil storage bag (906), a set air hole (902) is provided on the rotating side plate (18), and a dynamic air hole (903) is provided on the driven disk (5); When the electromagnetic suction cup (19) pulls the rotating side plate (18) and the driven plate (5) through the pulling plate (10), the coupling rubber cylinder (8) is compressed, and the fixed air hole (902) and the dynamic air hole (903) gradually overlap; when the dynamic teeth (16) and the fixed teeth (15) are meshed, the fixed air hole (902) and the dynamic air hole (903) are staggered.

5. A new energy vehicle power steering device according to claim 4, characterized in that: The transmission gear (4) comprises a sliding area (401) and a transmission area (402), and the nozzle of the oil storage bag (906) faces the sliding area (401); when the electromagnetic suction cup (19) pulls the rotating side plate (18) and the transmission gear (4) through the pulling plate (10), the driven rack (2) gradually meshes with the transmission area (402).

6. A new energy vehicle power steering device according to claim 5, characterized in that: The coupling rubber cylinder (8) is hollow and is made of polyurethane rubber.

7. A new energy vehicle power steering device according to claim 1, characterized in that: The pull plate (10) is connected to the transmission plate (6) via a return spring (14).

Images