A steer-by-wire actuator

Abstract

This utility model discloses an actuator for steer-by-wire, relating to the field of automotive parts. The utility model includes a motor, a moving structure, a telescopic structure, and a fixed structure; the moving structure includes a connecting seat fixedly connected to the motor and a bidirectional threaded screw rotatably connected to the inner surface of the connecting seat. Through the arrangement of a knob, slider, and connecting rod, the position of the mating block and mating hole can be changed by rotating the knob, allowing the mating hole to be moved to the corresponding position on the vehicle. Simultaneously, by releasing the fixing of the connecting rod, the position of the mating block and mating hole can also be changed by telescopically extending the connecting rod. This allows the mechanism to adapt to more different vehicle models, increasing its overall adaptability. Furthermore, from a long-term perspective, it reduces the need for customized steering mechanisms with multiple fixed connecting hole positions, saving manufacturers costs.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts, and in particular relates to an actuator for steer-by-wire. Background Technology

[0002] Steer-by-wire is a new type of automotive steering system that eliminates the mechanical connection between the steering wheel and steering wheels in traditional steering systems. Instead, it uses electronic signals and actuators to perform steering operations. In this system, the driver's steering intention is converted into electrical signals, which are then processed by the electronic control unit, which in turn directs the actuators to complete the steering action. The actuators mainly consist of components such as a motor, a reduction gear, a ball screw and nut pair, a steering tie rod, and a steering knuckle arm.

[0003] In practical applications of automotive steering mechanisms, for niche and uncommon car models, the steering mechanisms often need to be customized specifically for each model due to the uniqueness of their body structure, design philosophy, and technical parameters. However, for common family sedans, since most family sedans are quite similar in terms of body size, shape, and basic steering system working principle, automakers usually choose to produce a batch of relatively universal steering mechanisms to reduce production costs. However, such universal steering mechanisms also have certain limitations. Because they need to accommodate many car models, they cannot be finely customized for a specific model. This results in the connection hole positions in their structure usually remaining unchanged. Although common family sedans are roughly the same in size and basic principle, there may still be slight differences in frame structure and suspension system layout between different brands and car series. This can lead to inconsistencies in the connection hole positions when the steering mechanism is connected to the vehicle. In this case, if the steering mechanism is redeveloped to accommodate these individual differences, it will inevitably increase costs and has certain limitations. Therefore, we provide a steer-by-wire actuator to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a steer-by-wire actuator that can further improve the adaptability of steering actuators.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a steer-by-wire actuator, comprising a motor, a moving structure, a telescopic structure, and a fixed structure. The moving structure includes a connecting seat fixedly connected to the motor, a bidirectional threaded screw rotatably connected to the inner surface of the connecting seat, a knob fixedly connected to the rear end of the bidirectional threaded screw, and two sliders threadedly connected to the outer surface of the bidirectional threaded screw. The telescopic structure includes a limiting block slidably connected to the inner surface of the slider, a connecting rod fixedly connected to the side surface of the limiting block, a mating block fixedly connected to the side surface of the connecting rod, a mating hole formed on the mating block, and a fixed structure disposed on the slider.

[0006] The present invention is further configured such that the fixing structure includes a bearing block fixedly connected to the lower surface of the slider, two connecting shafts rotatably connected to the inner surface of the bearing block, two connecting blocks respectively fixedly connected to the two connecting shafts, two movable blocks respectively fixedly connected to the two connecting blocks, two rubber anti-slip pads respectively fixedly connected to the two movable blocks, two fixing blocks respectively fixedly connected to the upper surface of the two movable blocks, bolts movably connected to the two fixing blocks, and nuts threadedly connected to the outer surface of the bolts. By setting the fixing structure, the position of the moving docking block and the docking hole can be fixed.

[0007] The present invention is further configured such that the side surface of the rubber anti-slip pad contacts the connecting rod, and the bolt passes through the fixing block. Under the action of the rubber anti-slip pad, the friction coefficient between the connecting rod and the fixing structure can be increased, thereby increasing the stability of the mating block and the mating hole after fixing.

[0008] The present invention is further configured such that an anti-detachment block is fixedly connected to the end of the connecting shaft away from the connecting block, which is in contact with the bearing block. The side surface of the connecting block is in contact with the bearing block. Under the action of the anti-detachment block, the connecting shaft can be prevented from detaching from the bearing block.

[0009] The present invention is further configured such that the slider has a storage groove that is slidably connected to the limiting block, and the outer surface of the connecting rod is slidably connected to the slider, so that the connecting rod can move smoothly.

[0010] The present invention is further configured such that the motor is provided with a speed reducer, and the speed reducer is provided with a connecting flange, which enables the device to be connected to other corresponding components.

[0011] The present invention is further configured such that the side surface of the knob is in contact with the connecting seat, and the number of the fixing structures is multiple and distributed in a rectangular array.

[0012] The present invention is further configured such that the connecting seat has a sliding groove for sliding connection with the slider, and the telescopic structure is multiple and distributed in a rectangular array, so that the slider can move smoothly under the action of the sliding groove.

[0013] This utility model has the following beneficial effects: 1. This utility model, through the design of a knob, slider, and connecting rod, allows the position of the mating block and mating hole to be changed by rotating the knob. This enables the mating hole to be moved to the position of the corresponding connecting hole on the vehicle. Furthermore, after releasing the fixing of the connecting rod, the position of the mating block and mating hole can also be changed by extending the connecting rod. This allows the mechanism to adapt to more different vehicle models, thereby increasing the overall adaptability of the mechanism. In the long run, it also reduces the need for customized steering mechanisms with multiple fixed connecting hole positions, thus saving costs for manufacturers.

[0014] 2. By setting up a rubber anti-slip pad structure, this utility model can increase the friction between the connecting rod and the fixed structure under the action of the rubber anti-slip pad after the telescopic connecting rod adjusts the position of the connecting block and the connecting hole and fixes the position of the connecting block and the connecting hole. This can further improve the stability of the connecting block and the connecting hole after they are fixed.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of a steering-by-wire actuator.

[0018] Figure 2 This is a schematic diagram of the connecting seat portion in a steering-by-wire actuator; Figure 3 This is a schematic diagram of the cross-sectional portion of the connecting seat in a steering-by-wire actuator; Figure 4 This is a schematic diagram of the slider part in a steering-by-wire actuator; Figure 5 This is a schematic diagram of the cross-sectional portion of the slider in a steering-by-wire actuator. Figure 6 This is a schematic diagram of the cross-sectional portion of a load-bearing block in a steering-by-wire actuator; Figure 7 This is a schematic diagram of the cross-sectional portion of the connecting rod in a steering-by-wire actuator; Figure 8 This is a schematic diagram of the fixed block portion in a steer-by-wire actuator.

[0019] The attached diagram lists the components represented by each number as follows: 1. Motor; 2. Reducer; 3. Connecting seat; 4. Double-ended threaded screw; 5. Knob; 6. Slider; 7. Limit block; 8. Connecting rod; 9. Connecting block; 10. Connecting hole; 11. Bearing block; 12. Connecting shaft; 13. Connecting block; 14. Movable block; 15. Rubber anti-slip pad; 16. Fixing block; 17. Bolt; 18. Nut; 19. Storage groove; 20. Anti-detachment block; 21. Connecting flange; 22. Slide groove. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Specific Implementation

[0021] Please see Figures 1-8 This utility model is an actuator for steer-by-wire, including a motor 1, a moving structure, a telescopic structure and a fixed structure.

[0022] Please see Figures 1-5 The movable structure includes a connecting seat 3 fixedly connected to the motor 1, a bidirectional threaded screw 4 rotatably connected to the inner surface of the connecting seat 3, a knob 5 fixedly connected to the rear end of the bidirectional threaded screw 4, and two sliders 6 threadedly connected to the outer surface of the bidirectional threaded screw 4. The motor 1 is equipped with a reducer 2, and the reducer 2 is equipped with a connecting flange 21. The side surface of the knob 5 is in contact with the connecting seat 3.

[0023] In this embodiment, by rotating the knob 5, the bidirectional threaded screw 4 can be rotated, thereby causing the rotating bidirectional threaded screw 4 to drive the two sliders 6 to move closer or further apart under the action of the slide groove 22. When the knob 5 is rotated in the forward and reverse directions, the two sliders 6 move closer to each other, and when the knob 5 is rotated in the reverse direction, the two sliders 6 move further apart. The moving sliders 6 can drive other structures on the sliders 6 to move, thereby realizing the change of position of the mating block 9 and the mating hole 10. Specific Implementation

[0024] Please see Figures 1-8Based on the first specific embodiment, the telescopic structure includes a limiting block 7 slidably connected to the inner surface of the slider 6, a connecting rod 8 fixedly connected to the side surface of the limiting block 7, a docking block 9 fixedly connected to the side surface of the connecting rod 8, a docking hole 10 formed on the docking block 9, and a fixing structure provided on the slider 6. The fixing structure includes a bearing block 11 fixedly connected to the lower surface of the slider 6, two connecting shafts 12 rotatably connected to the inner surface of the bearing block 11, two connecting blocks 13 respectively fixedly connected to the two connecting shafts 12, two movable blocks 14 respectively fixedly connected to the two connecting blocks 13, two rubber anti-slip pads 15 respectively fixedly connected to the two movable blocks 14, and two rubber anti-slip pads 15 respectively fixedly connected to the two movable blocks 14. The upper surface of block 14 has a fixed block 16, a bolt 17 movably connected to the two fixed blocks 16, and a nut 18 threadedly connected to the outer surface of the bolt 17. The side surface of the rubber anti-slip pad 15 is in contact with the connecting rod 8. The bolt 17 passes through the fixed block 16. The end of the connecting shaft 12 away from the connecting block 13 is fixedly connected to an anti-detachment block 20 that is in contact with the bearing block 11. The side surface of the connecting block 13 is in contact with the bearing block 11. The slider 6 has a storage groove 19 that is slidably connected to the limiting block 7. The outer surface of the connecting rod 8 is slidably connected to the slider 6. The connecting seat 3 has a sliding groove 22 that is slidably connected to the slider 6. The telescopic structure is multiple and distributed in a rectangular array. The fixed structure is multiple and distributed in a rectangular array.

[0025] In this embodiment, after unscrewing the nut 18 from the bolt 17 and removing the bolt 17 from the fixing block 16, the fixation of the movable block 14 can be released. Then, the movable block 14 is flipped, allowing the connecting block 13, the movable block 14, the rubber anti-slip pad 15, and the fixing block 16 to rotate around the connecting shaft 12 inside the bearing block 11. The anti-detachment block 20 prevents the connecting shaft 12 from detaching from the bearing block 11. Once the rotated rubber anti-slip pad 15 is no longer in contact with the connecting rod 8, the fixation of the connecting rod 8 is released. Then, pulling or pushing the connecting rod 8 changes the position of the mating block 9 and the mating hole 10. After the position of the mating hole 10 is adjusted to a suitable position, the movable block 14 is flipped in the opposite direction, allowing the movable block 14 and the rubber anti-slip pad 15 to rotate around the connecting shaft 12 inside the bearing block 11. The sliding pad 15 and the fixing block 16 are flipped in opposite directions around the connecting shaft 12. After the flipped rubber anti-slip pad 15 comes into contact with the connecting rod 8 again, the bolt 17 is put back into the fixing block 16, and then the nut 18 is screwed back onto the bolt 17. This fixes the connecting rod 8, making the limit block 7, connecting rod 8, docking block 9, and docking hole 10 unable to move. Although adding these structures will increase the cost to some extent, this solution can be adapted to docking holes on more different models, greatly enhancing its versatility. Manufacturers can use the same adjustable steering mechanism to adapt to more different brands and models, reducing the need for customized steering mechanisms for various fixed connecting hole positions. When the production scale is large enough, the unit cost will decrease due to economies of scale.

[0026] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0027] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A steer-by-wire actuator, characterized in that, include: Motor (1); The movable structure includes a connecting seat (3) fixedly connected to the motor (1), a bidirectional threaded screw (4) rotatably connected to the inner surface of the connecting seat (3), a knob (5) fixedly connected to the rear end of the bidirectional threaded screw (4), and two sliders (6) both threadedly connected to the outer surface of the bidirectional threaded screw (4). The telescopic structure includes a limiting block (7) slidably connected to the inner surface of the slider (6), a connecting rod (8) fixedly connected to the side surface of the limiting block (7), a docking block (9) fixedly connected to the side surface of the connecting rod (8), a docking hole (10) opened on the docking block (9), and a fixing structure provided on the slider (6).

2. The actuator for steer-by-wire according to claim 1, characterized in that, The fixed structure includes a bearing block (11) fixedly connected to the lower surface of the slider (6), two connecting shafts (12) rotatably connected to the inner surface of the bearing block (11), two connecting blocks (13) fixedly connected to the two connecting shafts (12), two movable blocks (14) fixedly connected to the two connecting blocks (13), two rubber anti-slip pads (15) fixedly connected to the two movable blocks (14), two fixed blocks (16) fixedly connected to the upper surface of the two movable blocks (14), bolts (17) movably connected to the two fixed blocks (16), and nuts (18) threadedly connected to the outer surface of the bolts (17).

3. The actuator for steer-by-wire according to claim 2, characterized in that, The side surface of the rubber anti-slip pad (15) is in contact with the connecting rod (8), and the bolt (17) passes through the fixing block (16).

4. The actuator for steer-by-wire according to claim 2, characterized in that, The end of the connecting shaft (12) away from the connecting block (13) is fixedly connected to an anti-detachment block (20) that is in contact with the bearing block (11), and the side surface of the connecting block (13) is in contact with the bearing block (11).

5. The actuator for steer-by-wire according to claim 1, characterized in that, The slider (6) has a storage groove (19) that is slidably connected to the limiting block (7), and the outer surface of the connecting rod (8) is slidably connected to the slider (6).

6. The actuator for steer-by-wire according to claim 1, characterized in that, The motor (1) is equipped with a speed reducer (2), and the speed reducer (2) is equipped with a connecting flange (21).

7. The actuator for steer-by-wire according to claim 1, characterized in that, The side surface of the knob (5) is in contact with the connecting seat (3), and the number of the fixing structures is multiple and distributed in a rectangular array.

8. The actuator for steer-by-wire according to claim 1, characterized in that, The connecting seat (3) has a sliding groove (22) that is slidably connected to the slider (6), and the telescopic structure is multiple and distributed in a rectangular array.

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