A belt tensioning mechanism for an electric power steering system

Abstract

The utility model relates to the technical field of automobile electric power steering system, specifically disclose a kind of for electric power steering system's belt tensioning mechanism, the belt tensioning mechanism for electric power steering system includes mounting bracket, belt tensioning assembly and dismounting structure. Since mounting bracket can be moved along horizontal direction, belt tensioning structure can be moved to preset position along horizontal direction in this way, at this moment, the position of belt tensioning structure and dismounting structure can be adjusted, so that belt tensioning structure can be inserted with motor cooperation, while dismounting structure dismounts motor, subsequently belt tensioning structure drives motor to move, to realize the purpose of adjusting the tension of belt by adjusting the position of motor. The utility model adjusts the motor position by belt tensioning structure, to reach the purpose of adjusting the tension of belt, effectively solve the problem that belt tensioning mechanism in the prior art cannot adjust the motor position of horizontal positioning attitude.

Description

Technical Field

[0001] This utility model relates to the field of automotive electric power steering system technology, and in particular to a belt tensioning mechanism for an electric power steering system. Background Technology

[0002] Currently, based on the location of the motor, automotive electric power steering (EPS) systems can be divided into three main categories: column-assisted EPS (C-EPS), pinion-assisted EPS (P-EPS), and rack-assisted EPS (R-EPS). Among them, R-EPS electric power steering systems can meet the chassis layout requirements of different vehicle models. The motor assists directly to the rack through a ball screw structure, resulting in a short response time and fast, accurate power assistance, improving the driver's control over the steering system. Most R-EPS systems are belt-driven, meaning the motor and ball screw are connected by a belt. Due to the high output power of the motor, the belt tension needs to be strictly controlled.

[0003] In related technologies, grippers are typically used to clamp the outer contour of the motor to move it and thus tension the belt. However, this method requires the belt tensioning mechanism to be positioned vertically. Furthermore, due to varying relative positions of the motor within the equipment, when the motor is horizontally positioned, the belt tensioning mechanism in this method will interfere with the positioning fixture during arrangement, making it impossible to adjust the motor's position in a horizontally positioned state. Therefore, it is necessary to design a belt tensioning mechanism that can adjust the position of the motor in a horizontally positioned state. Utility Model Content

[0004] The purpose of this invention is to provide a belt tensioning mechanism for an electric steering system, so as to solve the problem that the existing belt tensioning mechanism cannot adjust the motor position in a horizontal positioning posture.

[0005] To address the aforementioned problems, this utility model provides a belt tensioning mechanism for an electric power steering system. The belt tensioning mechanism includes: a mounting bracket movable in a horizontal direction; a belt tensioning assembly including a connecting frame and a belt tensioning structure, wherein the connecting frame is rotatably mounted on the mounting bracket, the belt tensioning structure is mounted on the connecting frame, the belt tensioning structure can be plugged into and cooperated with a motor, and the belt tensioning structure is movably mounted to adjust the belt tension by adjusting the position of the motor; and a disassembly / removal structure mounted on the mounting bracket, which can fix or disassemble the motor.

[0006] As an optional technical solution for the belt tensioning mechanism of an electric power steering system, the belt tensioning structure includes a first driving member, a transmission structure, and an adjusting member. The first driving member is mounted on the connecting frame, and the adjusting member is movably disposed on the connecting frame. The first driving member is connected to the adjusting member through the transmission structure to drive the adjusting member to move. The adjusting member can be plugged into and cooperate with the motor.

[0007] As an optional technical solution for the belt tensioning mechanism of an electric power steering system, the transmission structure includes a transmission gear and a transmission rack. The transmission gear is connected to the output end of the first drive member, the transmission rack is connected to the adjusting member, and the transmission gear and the transmission rack mesh.

[0008] As an optional technical solution for the belt tensioning mechanism of an electric steering system, the motor has an adjustment slot, the adjustment component includes an adjustment seat and an adjustment block connected to the adjustment seat, the first drive component is connected to the adjustment seat through the transmission structure, the adjustment seat is movably mounted on the connecting frame, and the adjustment block can be inserted into the adjustment slot.

[0009] As an optional technical solution for the belt tensioning mechanism in an electric power steering system, the first driving component is a servo motor.

[0010] As an optional technical solution for the belt tensioning mechanism of the electric power steering system, the belt tensioning mechanism for the electric power steering system further includes a rotating structure disposed on the mounting bracket, the connecting frame being disposed on the rotating structure, and the rotating structure being rotatably disposed to drive the connecting frame to rotate.

[0011] As an optional technical solution for the belt tensioning mechanism of an electric power steering system, the rotating structure includes a rotating drive, a turntable, and a support. The rotating drive and the support are both mounted on the mounting bracket. The turntable is mounted on the support. The rotating drive and the turntable are driven together to drive the turntable to rotate. The connecting frame is mounted on the turntable.

[0012] As an optional technical solution for the belt tensioning mechanism of an electric power steering system, the disassembly and assembly structure includes multiple screw guns, which are spaced apart on the mounting bracket. The screw guns are capable of tightening or removing the fixing screws of the motor.

[0013] As an optional technical solution for the belt tensioning mechanism of an electric power steering system, the belt tensioning mechanism for an electric power steering system further includes a slider, a slide rail, and a base plate. The slide rail is disposed on the base plate, the slider is disposed at the bottom of the mounting bracket, the slide rail extends horizontally, and the slider is mounted on the slide rail and slides in cooperation with the slide rail.

[0014] As an optional technical solution for the belt tensioning mechanism of an electric power steering system, the belt tensioning mechanism for an electric power steering system further includes a tension measuring instrument, which is mounted on the mounting bracket and is capable of measuring the belt tension.

[0015] The beneficial effects of this utility model are as follows:

[0016] This invention provides a belt tensioning mechanism for an electric power steering system. The belt tensioning mechanism includes a mounting bracket, a belt tensioning assembly, and a disassembly / removal structure. The belt tensioning assembly includes a connecting frame and a belt tensioning structure. Using this belt tensioning mechanism, the belt tensioning structure is mounted on the connecting frame, which is rotatably mounted on the mounting bracket. Since the mounting bracket can move horizontally, the belt tensioning structure can move horizontally to a preset position. At this point, the positions of the belt tensioning structure and the disassembly / removal structure can be adjusted so that the belt tensioning structure can be inserted and engaged with the motor. Simultaneously, the disassembly / removal structure disassembles the motor. Subsequently, the belt tensioning structure drives the motor to move, thereby adjusting the belt tension by adjusting the motor's position. Once the belt reaches the preset tension, the disassembly / removal structure fixes the motor, thus completing the belt tension adjustment operation. The belt tensioning mechanism for electric steering systems of this invention can adjust the position of the motor in the horizontal positioning posture to adjust the belt tension, effectively solving the problem that the existing belt tensioning mechanism cannot adjust the position of the motor in the horizontal positioning posture. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the belt tensioning mechanism used in the electric steering system in an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the belt tensioning mechanism for the electric steering system in an embodiment of this utility model;

[0019] Figure 3 This is a schematic diagram of the belt tensioning mechanism for the electric steering system and its cooperation with the electric steering system in an embodiment of this utility model.

[0020] Figure 4 This is a schematic diagram of the motor structure in an embodiment of this utility model.

[0021] In the picture:

[0022] 1. Install the bracket;

[0023] 2. Belt tensioning assembly; 21. Connecting frame; 22. Belt tensioning structure; 221. First driving component; 222. Transmission structure; 2221. Transmission gear; 2222. Transmission rack; 223. Adjusting component; 2231. Adjusting seat; 2232. Adjusting block;

[0024] 3. Disassembly and assembly structure; 31. Screwdriver;

[0025] 4. Motor; 41. Adjustment slot;

[0026] 5. Rotating structure; 51. Rotating drive component; 52. Turntable; 53. Support component;

[0027] 61. Slider; 62. Slide rail; 63. Base plate. Detailed Implementation

[0028] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0032] like Figures 1 to 4 As shown, this embodiment provides a belt tensioning mechanism for an electric power steering system. The belt tensioning mechanism includes a mounting bracket 1, a belt tensioning assembly 2, and a disassembly / removal structure 3. The mounting bracket 1 is movable horizontally. The belt tensioning assembly 2 includes a connecting frame 21 and a belt tensioning structure 22. The connecting frame 21 is rotatably mounted on the mounting bracket 1, and the belt tensioning structure 22 is mounted on the connecting frame 21. The belt tensioning structure 22 can be inserted into and cooperate with a motor 4. The belt tensioning structure 22 is movably mounted to adjust the belt tension by adjusting the position of the motor 4. The disassembly / removal structure 3 is mounted on the mounting bracket 1 and can fix or disassemble the motor 4.

[0033] The belt tensioning mechanism for an electric power steering system of this invention involves mounting a belt tensioning structure 22 on a connecting frame 21, which is rotatably mounted on a mounting bracket 1. Since the mounting bracket 1 can move horizontally, the belt tensioning structure 22 can move horizontally to a preset position. At this point, the positions of the belt tensioning structure 22 and the disassembly / assembly structure 3 can be adjusted so that the belt tensioning structure 22 can be inserted and engaged with the motor 4. Simultaneously, the disassembly / assembly structure 3 disassembles the motor 4. Subsequently, the belt tensioning structure 22 drives the motor 4 to move, thereby adjusting the belt tension by adjusting the position of the motor 4. Once the belt reaches the preset tension, the disassembly / assembly structure 3 fixes the motor 4, completing the belt tension adjustment operation. Using the belt tensioning mechanism for an electric power steering system of this invention, the belt tensioning structure 22 can adjust the position of the motor 4 in a horizontally positioned state to achieve the purpose of adjusting the belt tension, effectively solving the problem in existing belt tensioning mechanisms that cannot adjust the position of the motor in a horizontally positioned state.

[0034] In some embodiments, the belt tensioning structure 22 includes a first driving member 221, a transmission structure 222, and an adjusting member 223. The first driving member 221 is mounted on a connecting frame 21, and the adjusting member 223 is movably disposed on the connecting frame 21. The first driving member 221 is connected to the adjusting member 223 via the transmission structure 222, thereby driving the adjusting member 223 to move. Since the adjusting member 223 can be plugged into and cooperate with the motor 4, the adjusting member 223 can drive the motor 4 to move, thus achieving the purpose of adjusting the belt tension. The transmission structure 222 includes, but is not limited to, a cam transmission mechanism, a screw transmission mechanism, or a rack and pinion transmission mechanism.

[0035] In this embodiment, the transmission structure 222 includes a transmission gear 2221 and a transmission rack 2222. The transmission gear 2221 is connected to the output end of the first drive member 221, and the transmission rack 2222 is connected to the adjusting member 223, with the transmission gear 2221 and the transmission rack 2222 meshing. This configuration converts the rotation of the transmission gear 2221 into linear motion of the transmission rack 2222, thereby driving the adjusting member 223 to move via the transmission rack 2222. Using the transmission method of the transmission gear 2221 and the transmission rack 2222 reduces the size of the belt tensioning mechanism used in the electric steering system, meeting equipment space requirements.

[0036] In some embodiments, such as Figure 2 and Figure 4 As shown, the motor 4 has an adjustment slot 41, and the adjustment component 223 includes an adjustment seat 2231 and an adjustment block 2232 connected to the adjustment seat 2231. The first driving component 221 is connected to the adjustment seat 2231 through a transmission structure 222. The adjustment seat 2231 is movably mounted on the connecting frame 21. In this way, the first driving component 221 can drive the adjustment seat 2231 to move on the connecting frame 21, so that the adjustment block 2232 can be inserted into the adjustment slot 41, thereby driving the motor 4 to move.

[0037] Optionally, the adjusting seat 2231 has an adjusting slider, the connecting bracket 21 has an adjusting slide rail, the adjusting slider is mounted on the adjusting slide rail, and the adjusting slider and the adjusting slide rail are in sliding engagement.

[0038] Specifically, the first driving component 221 includes, but is not limited to, a servo motor. Servo motors have the advantages of high precision control, strong stability, and fast dynamic response.

[0039] In some embodiments, the belt tensioning mechanism for the electric steering system further includes a rotating structure 5 disposed on the mounting bracket 1. A connecting frame 21 is disposed on the rotating structure 5, which is rotatably mounted, allowing the connecting frame 21 to rotate and thus adjusting the position of the belt tensioning structure 22.

[0040] Furthermore, the rotating structure 5 includes a rotating drive component 51, a turntable 52, and a support component 53. Both the rotating drive component 51 and the support component 53 are mounted on the mounting bracket 1, and the turntable 52 is mounted on the support component 53. Thus, the support component 53 ensures the rotation of the turntable 52 and simultaneously provides a limiting function in the radial and axial directions of the turntable 52. The rotating drive component 51 and the turntable 52 are connected, thereby driving the turntable 52 to rotate. The connecting bracket 21 is mounted on the turntable 52.

[0041] Optionally, the rotation drive 51 includes a rotation motor and a rotation gear. The outer periphery of the turntable 52 has meshing teeth. The rotation motor is mounted on the mounting bracket 1. The rotation gear is connected to the output end of the rotation motor. The rotation gear meshes with the meshing teeth to drive the turntable 52 to rotate.

[0042] In this embodiment, the disassembly and assembly structure 3 includes multiple screwdrivers 31. These screwdrivers 31 are spaced apart on the mounting bracket 1. The screwdrivers 31 can be used to tighten or loosen the fixing screws of the motor 4, thereby achieving the purpose of moving the position of the motor 4.

[0043] The screw gun 31 is rotatably mounted to drive the fixing screw of the motor 4 to rotate, thereby achieving the purpose of tightening or removing the motor 4.

[0044] In some embodiments, the belt tensioning mechanism for the electric steering system further includes a slider 61, a slide rail 62, and a base plate 63. The slide rail 62 is disposed on the base plate 63, and the slider 61 is disposed at the bottom of the mounting bracket 1. The slide rail 62 extends horizontally, and the slider 61 is mounted on the slide rail 62 and slidably engages with it. This configuration allows the mounting bracket 1 to move horizontally.

[0045] In this embodiment, the belt tensioning mechanism for the electric steering system also includes a tension measuring instrument. The tension measuring instrument is mounted on the mounting bracket 1. It measures the belt tension, indicating whether it is within the required range, and thus determining whether the belt tension adjustment operation has been completed.

[0046] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A belt tensioning mechanism for an electric power steering system, characterized in that, include: Mounting bracket (1) can be moved horizontally; The belt tensioning assembly (2) includes a connecting frame (21) and a belt tensioning structure (22). The connecting frame (21) is rotatably mounted on the mounting bracket (1), and the belt tensioning structure (22) is mounted on the connecting frame (21). The belt tensioning structure (22) can be plugged into a motor (4). The belt tensioning structure (22) is movable to adjust the belt tension by adjusting the position of the motor (4). The disassembly and assembly structure (3) is provided on the mounting bracket (1), and the disassembly and assembly structure (3) can fix or disassemble the motor (4).

2. The belt tensioning mechanism for an electric power steering system according to claim 1, characterized in that, The belt tensioning structure (22) includes a first driving member (221), a transmission structure (222), and an adjusting member (223). The first driving member (221) is mounted on the connecting frame (21), and the adjusting member (223) is movably disposed on the connecting frame (21). The first driving member (221) is connected to the adjusting member (223) through the transmission structure (222) to drive the adjusting member (223) to move. The adjusting member (223) can be plugged into the motor (4).

3. The belt tensioning mechanism for an electric power steering system according to claim 2, characterized in that, The transmission structure (222) includes a transmission gear (2221) and a transmission rack (2222). The transmission gear (2221) is connected to the output end of the first driving member (221), and the transmission rack (2222) is connected to the adjusting member (223). The transmission gear (2221) and the transmission rack (2222) mesh.

4. The belt tensioning mechanism for an electric power steering system according to claim 2, characterized in that, The motor (4) has an adjustment slot (41), and the adjustment member (223) includes an adjustment seat (2231) and an adjustment block (2232) connected to the adjustment seat (2231). The first driving member (221) is connected to the adjustment seat (2231) through the transmission structure (222). The adjustment seat (2231) is movably disposed on the connecting frame (21), and the adjustment block (2232) can be inserted into the adjustment slot (41).

5. The belt tensioning mechanism for an electric power steering system according to claim 2, characterized in that, The first driving component (221) is a servo motor.

6. The belt tensioning mechanism for an electric power steering system according to claim 1, characterized in that, The belt tensioning mechanism for the electric steering system further includes a rotating structure (5) disposed on the mounting bracket (1), and the connecting frame (21) is disposed on the rotating structure (5). The rotating structure (5) is rotatably disposed to drive the connecting frame (21) to rotate.

7. The belt tensioning mechanism for an electric power steering system according to claim 6, characterized in that, The rotating structure (5) includes a rotating drive (51), a turntable (52) and a support (53). The rotating drive (51) and the support (53) are both mounted on the mounting bracket (1). The turntable (52) is mounted on the support (53). The rotating drive (51) and the turntable (52) are connected to drive the turntable (52) to rotate. The connecting frame (21) is mounted on the turntable (52).

8. The belt tensioning mechanism for an electric power steering system according to claim 1, characterized in that, The disassembly and assembly structure (3) includes multiple screw guns (31), which are spaced apart on the mounting bracket (1). The screw guns (31) can tighten or loosen the fixing screws of the motor (4).

9. The belt tensioning mechanism for an electric power steering system according to any one of claims 1-8, characterized in that, The belt tensioning mechanism for the electric steering system further includes a slider (61), a slide rail (62), and a base plate (63). The slide rail (62) is disposed on the base plate (63), and the slider (61) is disposed at the bottom of the mounting bracket (1). The slide rail (62) extends horizontally, and the slider (61) is mounted on the slide rail (62) and slides in cooperation with the slide rail (62).

10. The belt tensioning mechanism for an electric power steering system according to any one of claims 1-8, characterized in that, The belt tensioning mechanism for the electric steering system also includes a tension measuring instrument, which is mounted on the mounting bracket (1) and is capable of measuring the belt tension.

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