Output shaft assembly for a pedal motor

Abstract

The utility model discloses an output shaft subassembly of pedal motor, including output shaft stem, installation cavity and coaxial butt joint subassembly, output shaft stem is modularized and is provided with multistage, and installation cavity is set at the output shaft stem axle center place. The utility model has the beneficial effects that: in this scheme, the first linkage link, the second linkage link combination constitute the scissor type structure in the coaxial butt joint subassembly, and realize two groups of synchronous linkage through a driving link, in the output shaft stem connection process, driving link action, drive two groups of scissor type structure synchronous operation, can rapidly, accurately adjust two output shaft stems to the same axial position, compared with traditional manual positioning mode, has improved positioning accuracy and efficiency greatly, has guaranteed the coaxial degree of adjacent rod piece when welding, and then has improved the welding quality, has reduced the output shaft performance decline problem that leads to the welding deviation, and, the coaxial butt joint subassembly firm structure itself, can provide strong support for the junction after completing the output shaft stem butt joint.

Description

Technical Field

[0001] This utility model relates to a pedal motor, specifically an output shaft assembly for a pedal motor, and belongs to the field of pedal motor technology. Background Technology

[0002] The pedal motor output shaft is a key mechanical component in the automotive pedal system, connecting the pedal motor with actuators such as the pedal arm and transmission components. Its core function is to transmit the rotational torque generated by the motor to the pedal mechanism, thereby driving the pedal to complete corresponding actions, such as adjusting the opening of the accelerator pedal and assisting in the control of the brake pedal. One end of the output shaft is connected to the rotor or reduction mechanism inside the motor, and the other end is connected to the pedal actuator to ensure the stability and accuracy of power transmission.

[0003] However, most existing pedal motors have various problems. For example, in the pedal motor output shaft and gear assembly disclosed in CN205047783U, although the elastic bushing connection method solves the problems of traditional hot fitting or interference fit, in this technical solution and most current technical solutions, in the field of automotive pedal motor output shaft assembly, in order to adapt to diverse installation conditions, the current output shaft is often designed as a multi-segment modular structure. This structure allows for flexible combination according to actual needs during installation, and adjacent rods are connected by welding. However, this conventional approach has significant drawbacks. For example, in the welding process, in order to ensure the coaxiality of the output shaft as a whole and to ensure the stability and accuracy of torque transmission, the two adjacent rods must be strictly on the same axis. This requires extremely precise positioning of the adjacent rods before welding. This process is not only time-consuming and labor-intensive, but also requires a high level of technical skill and assembly process from the operators. Any slight deviation may affect the final performance of the output shaft. Furthermore, after the welding operation is completed, it is necessary to further measure the coaxial accuracy of the output shaft. This additional inspection process undoubtedly increases production time and labor costs, reduces production efficiency, and if the coaxial accuracy is found to be substandard, the welded parts need to be reworked, such as re-welded or ground, which further exacerbates resource waste, increases scrap rate, and negatively impacts the company's production efficiency. Utility Model Content

[0004] This utility model addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different solution. Specifically, the purpose of this utility model is to overcome the aforementioned shortcomings in existing technologies by proposing an output shaft assembly for a pedal motor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An output shaft assembly for a pedal motor includes an output shaft, a mounting cavity, and a coaxial docking assembly. The output shaft is modularly configured with multiple segments. The mounting cavity is located at the axis of the output shaft. The coaxial docking assembly is located within the mounting cavity and between two adjacent output shafts. The coaxial docking assembly includes a drive rod, a limiting ring, a driven ring, a thread, a first linkage rod, a second linkage rod, and a support plate. The limiting ring is coaxially rotatably connected to one side of the drive rod, and the driven ring is slidably sleeved on the other side of the drive rod. The inner side of the driven ring has a threaded hole structure. The outer wall of the drive rod is provided with a thread, which mates with the threaded hole. The first linkage rod and the second linkage rod are hinged to each other at their centers. One end of the first linkage rod is rotatably connected to the driven ring, and one end of the second linkage rod is rotatably connected to the limiting ring. The other ends of the first linkage rod and the second linkage rod are respectively rotatably connected to both sides of the support plate. The support plate abuts against the inner wall of the mounting cavity. The support plate is provided with an abutment component.

[0006] As a further improvement of this utility model: the coaxial docking assembly is arranged in two sets, one above the other, and the two drive rods are located on the same axis.

[0007] As a further embodiment of this utility model: the abutting assembly includes a support frame, a toothed disc, a connecting rod, and an abutting plate. The support frame is fixed on the support plate, the toothed disc is rotatably connected to the center of the support frame, one end of the connecting rod is fixed to the edge of the toothed disc, and the other end is fixed to the abutting plate. Two abutting plates are symmetrically arranged on both sides of the support plate.

[0008] As a further embodiment of this utility model: the abutting assembly further includes a rack, a guide rod, and a guide cylinder. The rack is slidably connected to the support plate and meshes with the gear plate. The guide cylinder is fixed to the support plate. One end of the guide rod is fixed to the rack, and the other end is slidably engaged in the guide cylinder.

[0009] As a further improvement of this utility model: a spring is provided inside the guide cylinder, and one end of the spring abuts against the guide rod.

[0010] As a further embodiment of this utility model: a transmission rod is coaxially fixed to one end of the drive rod, a polygonal groove is provided at the center of the transmission rod shaft, and a through hole is provided through the center of the output shaft rod, the through hole is connected to the mounting cavity, and the transmission rod is located in the through hole.

[0011] The beneficial effects of this utility model are: This invention significantly improves the adaptability of the output shaft through a multi-segment output shaft structure design. When facing different installation environments and operating conditions, appropriate segments can be flexibly selected and combined, eliminating the need for a custom-designed integral output shaft. This reduces R&D and production costs, shortens product delivery cycles, and provides automakers with a more convenient and efficient option. The hollow design inside the output shaft effectively reduces the overall weight, which aligns with the automotive industry's trend towards lightweighting. This not only helps reduce overall vehicle energy consumption and improve fuel economy or extend the driving range of electric vehicles, but also reduces the inertial force caused by weight, making the pedal response more agile and precise, and enhancing the driving experience. Crucially, this solution utilizes a scissor-like structure formed by the first and second linkage rods in the coaxial docking assembly. A single drive rod enables synchronous linkage between the two sets of linkages. During the output shaft connection process, the drive rod operates, causing the two scissor-like structures to operate synchronously. This allows for rapid and precise adjustment of the two output shafts to the same axial position. Compared to traditional manual positioning methods, this significantly improves positioning accuracy and efficiency, ensuring coaxiality of adjacent rods during welding, thereby enhancing welding quality and reducing performance degradation of the output shafts due to welding deviations. Furthermore, the robust structure of the coaxial docking assembly provides strong support to the connection point after the output shaft docking is completed, significantly enhancing the strength and stability of the connection. This ensures that the connection is less prone to loosening or deformation under long-term, high-intensity operation, greatly extending the output shaft's service life, reducing after-sales maintenance costs, and effectively guaranteeing the reliable operation of the pedal motor system. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the coaxial docking assembly structure of this utility model; Figure 3 This is a schematic diagram of the support plate and its connection structure of the present invention; Figure 4 This is a schematic diagram of the abutment component structure of this utility model.

[0013] In the diagram: 1. Output shaft, 2. Mounting cavity, 3. Coaxial docking assembly, 31. Drive rod, 32. Limiting ring, 33. Driven ring, 34. Thread, 35. First linkage rod, 36. Second linkage rod, 37. Support plate, 4. Abutment assembly, 41. Support frame, 42. Gear plate, 43. Connecting rod, 44. Abutment plate, 45. Rack, 46. Guide rod, 47. Guide cylinder, 5. Transmission rod. Detailed Implementation

[0014] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0015] like Figures 1 to 4 As shown, an output shaft assembly for a pedal motor includes an output shaft 1, a mounting cavity 2, and a coaxial docking assembly 3. The output shaft 1 is modularly configured with multiple segments. The mounting cavity 2 is located at the axis of the output shaft 1. The coaxial docking assembly 3 is located inside the mounting cavity 2 and between two adjacent output shafts 1. The coaxial docking assembly 3 includes a drive rod 31, a limiting ring 32, a driven ring 33, a thread 34, a first linkage rod 35, a second linkage rod 36, and a support plate 37. The limiting ring 32 is coaxially rotatably connected to one side of the drive rod 31, and the driven ring 33 is slidably sleeved on the other side of the drive rod 31. The inner side of the driven ring 33 has a threaded hole structure. The outer wall of the drive rod 31 is provided with a thread 34, which mates with the threaded hole. The first linkage rod 35 and the second linkage rod 36 are hinged to each other at their centers. One end of the first linkage rod 35 is rotatably connected to the driven ring 33, and one end of the second linkage rod 36 is rotatably connected to the limiting ring 32. The other ends of the first linkage rod 35 and the second linkage rod 36 are rotatably connected to the two sides of the support plate 37, respectively. The support plate 37 abuts against the inner wall of the mounting cavity 2. Two sets of coaxial docking assemblies 3 are arranged side by side, and the two drive rods 31 are located on the same axis. The support plate 37 is provided with an abutment component 4, which includes a support frame 41, a toothed disc 42, a connecting rod 43 and an abutment plate 44. The support frame 41 is fixed on the support plate 37, the toothed disc 42 is rotatably connected to the center of the support frame 41, one end of the connecting rod 43 is fixed to the edge of the toothed disc 42 and the other end is fixed to the abutment plate 44. Two abutment plates 44 are symmetrically arranged on both sides of the support plate 37. The abutment assembly 4 also includes a rack 45, a guide rod 46 and a guide cylinder 47. The rack 45 is slidably connected to the support plate 37 and meshes with the gear disc 42. The guide cylinder 47 is fixed to the support plate 37. One end of the guide rod 46 is fixed to the rack 45, and the other end is slidably engaged in the guide cylinder 47.

[0016] This invention significantly improves the adaptability of the output shaft through its multi-segment output shaft structure design. When facing different installation environments and operating conditions, appropriate segments can be flexibly selected and combined, eliminating the need for a custom-designed integral output shaft. This reduces R&D and production costs, shortens product delivery cycles, and provides automakers with a more convenient and efficient option. The hollow design inside the output shaft 1 effectively reduces the overall weight, which aligns with the lightweight development trend in the automotive industry. This not only helps to reduce the energy consumption of the whole vehicle, improve fuel economy or extend the driving range of electric vehicles, but also reduces the inertial force caused by weight, making the pedal response more agile and precise, and improving the driving control experience. Crucially, in this solution, the first linkage rod 35 and the second linkage rod 36 in the coaxial docking assembly 3 form a scissor structure, and a single drive rod 31 enables synchronous linkage between the two sets. During the connection of the output shaft rod 1, the drive rod 31 moves, causing the two sets of scissor structures to operate synchronously. This allows for rapid and precise adjustment of the two output shaft rods 1 to the same axial position, significantly improving positioning accuracy and efficiency compared to traditional manual positioning methods. This ensures the coaxiality of adjacent rods during welding, thereby improving welding quality and reducing the performance degradation of the output shaft caused by welding deviations. Furthermore, the coaxial docking assembly 3 itself has a robust structure, providing strong support for the connection after the output shaft rods 1 are docked, significantly enhancing the strength and stability of the connection. This ensures that the connection is less prone to loosening or deformation under long-term, high-intensity operation, greatly extending the service life of the output shaft, reducing after-sales maintenance costs, and effectively guaranteeing the reliable operation of the pedal motor system. Example 2

[0017] like Figures 1 to 4 As shown, in addition to all the technical features included in Embodiment 1, this embodiment also includes: A spring is installed inside the guide cylinder 47, and one end of the spring abuts against the guide rod 46. The spring force enables one end of the rack 45 to abut against the inner wall of the mounting cavity 2, providing stable support for the rotation of the drive rod 31.

[0018] One end of the drive rod 31 is coaxially fixed with a transmission rod 5. A polygonal slot is provided at the center of the transmission rod 5, and a through hole is provided through the center of the output shaft rod 1. The through hole communicates with the mounting cavity 2. The transmission rod 5 is located in the through hole. Through the setting of the transmission rod 5 and the polygonal slot, the operator can quickly connect with the transmission rod 5 using external tools and drive the drive rod 31 to rotate.

[0019] Working principle: When using this pedal motor, first place the coaxial docking assembly 3 in the mounting cavity 2 of the two adjacent output shafts 1. At this time, under the action of the spring force, one end of the rack 45 abuts against the inner wall of the mounting cavity 2, providing stable support for the rotation of the drive rod 31. Connect one end of the two output shafts 1 to each other, and connect them to the transmission rod 5 through an external tool. Drive the transmission rod 5 and the drive rod 31 to rotate through the external tool. At this time, the driven ring 33 engages with the thread 34 and is displaced on the drive rod 31, which synchronously drives the first linkage rod 35 and the second linkage rod 36 to cross-link, so that the support plate 37 abuts against the mounting cavity 2. At the same time as abutting, the rack 45 is pushed to slide, so that the gear plate 42 meshes and links. The gear plate 42 drives the abutment plate 44 to flip through the connecting rod 43 and abut against the inner wall of the mounting cavity 2, thereby increasing the contact area.

[0020] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0021] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An output shaft assembly for a pedal motor, comprising an output shaft (1), a mounting cavity (2), and a coaxial docking assembly (3), characterized in that, The output shaft (1) is modularly configured with multiple segments. The mounting cavity (2) is located at the axis of the output shaft (1). The coaxial docking assembly (3) is located inside the mounting cavity (2) and between two adjacent output shafts (1). The coaxial docking assembly (3) includes a drive rod (31), a limiting ring (32), a driven ring (33), a thread (34), a first linkage rod (35), a second linkage rod (36), and a support plate (37). The limiting ring (32) is coaxially rotatably connected to one side of the drive rod (31), and the driven ring (33) is slidably sleeved on the other side of the drive rod (31). The inner side of the driven ring (33) has a threaded hole structure, and the outer wall of the drive rod (31) is provided with a thread (34). The thread (34) is engaged with the threaded hole. The first linkage rod (35) and the second linkage rod (36) are hinged to each other at their center. One end of the first linkage rod (35) is rotatably connected to the driven ring (33), and one end of the second linkage rod (36) is rotatably connected to the limiting ring (32). The other ends of the first linkage rod (35) and the second linkage rod (36) are rotatably connected to the two sides of the support plate (37), and the support plate (37) abuts against the inner wall of the mounting cavity (2). The support plate (37) is provided with an abutment component (4).

2. The output shaft assembly of a pedal motor according to claim 1, characterized in that: The coaxial docking assembly (3) is arranged in two sets, one above the other, and the two drive rods (31) are located on the same axis.

3. The output shaft assembly of a pedal motor according to claim 1, characterized in that: The abutment assembly (4) includes a support frame (41), a toothed disc (42), a connecting rod (43), and an abutment plate (44). The support frame (41) is fixed on the support plate (37). The toothed disc (42) is rotatably connected to the center of the support frame (41). One end of the connecting rod (43) is fixed to the edge of the toothed disc (42), and the other end is fixed to the abutment plate (44). Two abutment plates (44) are symmetrically arranged on both sides of the support plate (37).

4. The output shaft assembly of a pedal motor according to claim 3, characterized in that: The abutment assembly (4) further includes a rack (45), a guide rod (46) and a guide cylinder (47). The rack (45) is slidably connected to the support plate (37) and meshes with the gear disc (42). The guide cylinder (47) is fixed on the support plate (37). One end of the guide rod (46) is fixed on the rack (45), and the other end is slidably engaged in the guide cylinder (47).

5. The output shaft assembly of a pedal motor according to claim 4, characterized in that: A spring is provided inside the guide cylinder (47), and one end of the spring abuts against the guide rod (46).

6. The output shaft assembly of a pedal motor according to claim 1, characterized in that: One end of the drive rod (31) is coaxially fixed with a transmission rod (5). The transmission rod (5) has a polygonal slot at its axis and a through hole at the center of the output shaft (1). The through hole is connected to the mounting cavity (2), and the transmission rod (5) is located inside the through hole.

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