Automobile electric footboard motor shaft transmission mechanism

Abstract

The application discloses a kind of automobile electric foot pedal motor shaft transmission mechanism, belong to automobile pedal technical field.It includes: pedal;Driving link mechanism, it includes sequentially hinged connecting rod support, connecting plate assembly and chassis, pedal is installed on chassis;Transmission shaft, it is inserted in connecting plate assembly and is linked with connecting plate assembly;Motor, it has motor output shaft, motor output shaft is inserted into transmission shaft and gap cooperation with transmission shaft and leaves installation gap;Transmission bushing, it is inserted into installation gap, transmission bushing is linked with motor output shaft and transmission shaft;Locking nut, end portion is detachably connected with transmission bushing, locking nut is threadedly connected with motor output shaft end portion.When motor cannot control pedal to extend, retract, twist locking nut and drive transmission bushing from installation gap and move outward, transmission bushing, motor are sequentially disassembled, driving link mechanism can be freely moved, whereby it can manually control pedal to extend, retract.

Description

Technical Field

[0001] This invention belongs to the field of automotive pedal technology, specifically relating to a motor shaft transmission mechanism for an automotive electric pedal. Background Technology

[0002] The operation of electric car pedals is mainly driven by a motor. When the car's electric pedals are powered down, or when the controller or motor fails, the motor may stop working. Due to the motor stalling, the pedal will remain in its current state, and it will be impossible to extend, retract, or enter the service mode by opening or closing the car door or using the car key. This can lead to the following problems:

[0003] 1. When the pedals are extended or not fully retracted, the vehicle's ground clearance will be reduced, affecting the vehicle's passability;

[0004] 2. When the pedal is extended, the outer edge of the pedal will extend beyond the width of the vehicle body, affecting the vehicle's passability;

[0005] 3. In some vehicles, the extended pedal may obstruct the vehicle's lifting point, rendering the onboard jack unusable and affecting operations such as changing the spare tire while the vehicle is in motion.

[0006] To solve the above problems, it is necessary to control the connection between the motor output shaft and the connecting rod. When the motor is not working properly, disconnect the connection between the motor output shaft and the pedal connecting rod, then manually retract the pedal, and then lock the connecting rod and the motor output shaft to achieve the purpose of manually retracting the pedal.

[0007] However, in most automotive electric pedals currently on the market, the transmission connection between the motor output shaft and the pedal linkage bracket is mainly achieved by locking the motor output shaft to the pedal linkage with a single bolt or a combination of a bolt and a wedge block. This structure is generally located inside or on the back of the linkage, and is not visible when the vehicle is parked on the side of the road. It is difficult for the driver to disconnect the motor shaft from the linkage bracket by removing the bolt. Furthermore, after manually pushing the pedal back, the removed bolt cannot be used to fix the pedal in place. In addition, the bolt is usually an M6 or M8 hex head bolt or socket head cap bolt, and removing the bolt requires the corresponding tool, which is generally not provided in the vehicle, making it difficult to manually retract the pedal. Summary of the Invention

[0008] This invention addresses the aforementioned problems in the prior art by proposing a shaft transmission mechanism for an automotive electric pedal motor.

[0009] This invention can be achieved through the following technical solutions:

[0010] A motor shaft drive mechanism for an electric automotive pedal includes:

[0011] pedal;

[0012] An active linkage mechanism includes a linkage bracket, a connecting plate assembly, and a base frame. The pedal is mounted on the base frame. The base frame, the connecting plate assembly, and the linkage bracket are sequentially hinged to form a multi-link mechanism. The linkage bracket is used to connect to the vehicle body.

[0013] A drive shaft is inserted into the connecting plate assembly and is linked to the connecting plate assembly.

[0014] An electric motor having an output shaft, wherein the output shaft is inserted into the drive shaft and is clearance-fitted with the drive shaft with an installation gap between them;

[0015] A transmission bushing is fitted onto the motor output shaft and inserted into the installation gap. The inner and outer end faces of the transmission bushing are respectively linked to the motor output shaft and the transmission shaft.

[0016] A locking nut is provided, the end of which is detachably connected to the transmission bushing. The locking nut is threadedly connected to the end of the motor output shaft. As the locking nut is turned, the transmission bushing is inserted into or moved out of the installation gap.

[0017] As a further improvement of the present invention, the connecting plate assembly includes an outer connecting plate and an inner connecting plate. The two ends of the outer connecting plate are respectively hinged to the connecting rod bracket and the base frame, and the two ends of the inner connecting plate are respectively hinged to the connecting rod bracket and the base frame.

[0018] As a further improvement of the present invention, when the motor is not installed on the linkage bracket, the linkage bracket, the outer connecting plate, the base frame and the inner connecting plate form a freely movable four-bar linkage mechanism.

[0019] As a further improvement of the present invention, the motor output shaft is arranged in a stepped shape and has a large diameter portion, a medium diameter portion and a small diameter portion, wherein the small diameter portion passes through the transmission shaft and extends outward.

[0020] As a further improvement of the present invention, the large-diameter portion is clearance-fitted with the drive shaft, the medium-diameter portion forms the mounting gap with the drive shaft, and the small-diameter portion is used for threaded connection with the lock nut.

[0021] As a further improvement of the present invention, when the transmission bushing is inserted into the installation gap, the motor output shaft transmits torque to the transmission shaft through the transmission bushing. The transmission shaft is interference-fitted with the inner connecting plate and hinged to the connecting rod bracket.

[0022] As a further improvement of the present invention, the motor output shaft and the transmission bushing, and the transmission bushing and the transmission shaft can be fitted together by splines, gears, or polygonal surfaces.

[0023] As a further improvement of the present invention, the end of the transmission bushing is provided with an outwardly protruding snap-fit ​​portion, and the end of the locking nut is provided with a snap-fit ​​groove, and the snap-fit ​​portion is engaged with the snap-fit ​​groove.

[0024] As a further improvement of the present invention, it also includes a motor housing, wherein the motor is disposed within the motor housing and connected to the connecting rod bracket through the motor housing.

[0025] As a further improvement of the present invention, it also includes a driven linkage mechanism, which is configured as a freely movable multi-link mechanism. One end of the driven linkage mechanism is used to install the pedal and the other end is used to connect to the vehicle body. The driven linkage mechanism and the driving linkage mechanism are located on the same side of the pedal.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. By tightening the lock nut, the transmission bushing is moved axially along the motor output shaft. When the transmission bushing is inserted into the installation gap, it can transmit the torque of the motor output shaft to the drive shaft, thereby driving the active linkage mechanism to move. When the motor fails, the transmission bushing can be quickly pulled out from the installation gap by loosening the lock nut, thereby disengaging the drive shaft and the motor output shaft. After the motor is disassembled, the active linkage mechanism can be manually adjusted, thereby achieving the purpose of adjusting the pedal position.

[0028] 2. After the pedal is manually adjusted to the desired position, remove the transmission bushing from the lock nut, and then fix the lock nut in reverse on the motor output shaft. At this time, one end of the lock nut will press against the transmission shaft, thereby locking the transmission shaft and the motor output shaft. This allows the pedal to remain locked in the current position so that the driver can perform subsequent operations.

[0029] 3. The structure of the locking nut, transmission bushing and motor output shaft is simple and compact, and the connection is stable and reliable. The locking nut and motor are located on the left and right sides of the linkage mechanism and exposed, which facilitates disassembly and installation.

[0030] 4. The tool for removing the lock nut is the hexagonal socket provided with the vehicle for changing wheels, which is more convenient as no additional tools are required. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the pedal, the active linkage mechanism, and the driven linkage mechanism of the present invention after they are connected.

[0032] Figure 2 This is a schematic diagram of the active linkage mechanism of the present invention;

[0033] Figure 3 This is a cross-sectional view of the active linkage mechanism of the present invention after the transmission bushing is inserted into the installation gap;

[0034] Figure 4 This is a cross-sectional view of the active linkage mechanism of the present invention after the transmission bushing has been moved out of the installation gap;

[0035] Figure 5 This is a cross-sectional view of the locking nut of the present invention installed in reverse and locking the active linkage mechanism;

[0036] Figure 6 This is a cross-sectional view of the motor output shaft, transmission bushing, and transmission shaft after they are connected together according to the present invention.

[0037] In the diagram, 100 is the pedal; 200 is the active linkage mechanism; 210 is the linkage bracket; 220 is the connecting plate assembly; 221 is the outer connecting plate; 222 is the inner connecting plate; 230 is the base frame; 240 is the drive shaft; 250 is the motor; 251 is the motor output shaft; 252 is the motor housing; 260 is the transmission bushing; 261 is the snap-fit ​​part; 270 is the lock nut; 271 is the snap-fit ​​groove; 280 is the rotating shaft; and 300 is the driven linkage mechanism. Detailed Implementation

[0038] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical methods of the present invention. However, the present invention is not limited to these embodiments.

[0039] like Figure 1-6 As shown, the present invention provides a shaft transmission mechanism for an automotive electric pedal motor, comprising:

[0040] The pedal 100 is located on both sides of the vehicle body for people to step on when getting on and off the vehicle. As an electric pedal 100, under normal operating conditions, the pedal 100 is extended or retracted by the motor 250. However, when the vehicle power is off, the controller fails, or the motor 250 fails, the motor 250 cannot work properly. Due to the stall of the motor 250, the pedal 100 cannot be retracted properly. Therefore, in this embodiment, the transmission mechanism of the pedal 100 is improved to achieve the purpose of manually retracting and locking the pedal 100.

[0041] The active linkage mechanism 200 includes a linkage bracket 210, a connecting plate assembly 220, and a base frame 230. The pedal 100 is mounted on the base frame 230. The base frame 230, the connecting plate assembly 220, and the linkage bracket 210 are sequentially hinged to form a freely movable multi-link mechanism. The linkage bracket 210 is used to connect with the vehicle body. That is to say, when the active linkage mechanism 200 is not locked, the movement of the multi-link mechanism can drive the base frame 230 to extend or retract, thereby driving the pedal 100 to extend or retract.

[0042] The drive shaft 240 is inserted into the connecting plate assembly 220 and linked to the connecting plate assembly 220. When the drive shaft 240 rotates, it can drive the connecting plate assembly 220 to rotate, thereby driving the entire active linkage mechanism 200 to move.

[0043] The motor 250 has a motor output shaft 251, which is inserted into the transmission shaft 240 and has a clearance fit with the transmission shaft 240. That is to say, the rotation of the motor output shaft 251 cannot directly drive the transmission shaft 240 to rotate. In addition, there is an installation gap between the end of the transmission shaft 240 and the motor output shaft 251.

[0044] The transmission bushing 260 is sleeved on the motor output shaft 251 and inserted into the installation gap along the axial direction of the motor output shaft 251. At this time, the transmission bushing 260 is linked to the transmission shaft 240 and the output shaft of the motor 250 respectively. That is to say, the transmission bushing 260 can transmit the torque output by the motor output shaft 251 to the transmission shaft 240, thereby causing the connecting plate assembly 220, the base frame 230, and the pedal 100 to rotate, so as to realize the purpose of the motor 250 controlling the pedal 100 to extend and retract.

[0045] The locking nut 270 is detachably connected to the transmission bushing 260 at its end. The locking nut 270 is threadedly connected to the output shaft end of the motor 250. As the locking nut 270 is turned, the transmission bushing 260 is inserted into or moved out of the installation gap.

[0046] Specifically, since the locking nut 270 and the transmission bushing 260 are detachably connected, when the transmission bushing 260 is fitted onto the motor output shaft 251, as the locking nut 270 is turned inward, the transmission bushing 260 can be moved synchronously until it is inserted into the installation gap. At this time, the motor 250 can work normally and drive the pedal 100 to extend and retract.

[0047] When problems such as vehicle power failure, controller malfunction, or motor 250 failure occur, motor 250 cannot control the extension and retraction of pedal 100. In this case, simply loosen the locking nut 270 outward, thereby moving the transmission bushing 260 outward from the installation gap. After removing the transmission bushing 260, disassemble motor 250. At this point, all hinge points of the entire active linkage mechanism 200 can move freely, allowing manual control of pedal 100's extension and retraction. Once pedal 100 is manually moved to the appropriate position, remove transmission bushing 260 from locking nut 270, and then fix locking nut 270 in reverse on motor output shaft 251 (e.g., Figure 5 As shown), at this time, one end of the locking nut 270 will press against the drive shaft 240, thereby locking the drive shaft 240 and the motor output shaft 251, and thus enabling the pedal 100 to remain locked in the current position so that the driver can perform subsequent operations.

[0048] It is worth mentioning that, for the connection structure between the motor output shaft 251 and the linkage mechanism, the transmission bushing 260 and the locking nut 270 are used to lock the motor output shaft 251 and the linkage mechanism. This structure is simple, compact, and the connection is stable and reliable. In addition, the locking nut 270 and the motor 250 are located on the left and right sides of the linkage mechanism and are exposed, which facilitates disassembly and installation.

[0049] In addition, the tool for removing the lock nut 270 is the hexagonal socket provided with the vehicle for changing wheels, which is more convenient as no additional tools are required.

[0050] Preferably, the connecting plate assembly 220 includes an outer connecting plate 221 and an inner connecting plate 222. The two ends of the outer connecting plate 221 are respectively hinged to the connecting rod bracket 210 and the base frame 230, and the two ends of the inner connecting plate 222 are respectively hinged to the connecting rod bracket 210 and the base frame 230. Both hinge points are connected by a rotating shaft 280.

[0051] Preferably, when the motor 250 is not installed on the linkage bracket 210, the linkage bracket 210, the outer connecting plate 221, the base frame 230 and the inner connecting plate 222 form a freely movable four-bar linkage mechanism. At this time, the rotation of the four-bar linkage mechanism can be manually controlled, thereby controlling the extension or retraction of the pedal 100.

[0052] Preferably, the motor output shaft 251 is arranged in a stepped shape and has a large diameter portion, a medium diameter portion and a small diameter portion, wherein the small diameter portion passes through the drive shaft 240 and extends outward.

[0053] Preferably, the large-diameter portion is clearance-fitted with the drive shaft 240, the medium-diameter portion forms an installation gap with the drive shaft 240, and the small-diameter portion is used for threaded connection with the lock nut 270.

[0054] Preferably, after the transmission bushing 260 is inserted into the installation gap, the motor output shaft 251 transmits torque to the transmission shaft 240 through the transmission bushing 260. The transmission shaft 240 is interference-fitted with the inner connecting plate 222 and hinged to the connecting rod bracket 210. When the motor 250 is working, the motor output shaft 251 rotates, which in turn drives the transmission bushing 260, the transmission shaft 240, and the inner connecting plate 222 to rotate, thereby driving the entire active linkage mechanism 200 to work, and finally controlling the extension and retraction of the pedal 100.

[0055] Preferably, the motor output shaft 251 and the transmission bushing 260, and the transmission bushing 260 and the transmission shaft 240 can be fitted together by splines, gears, polygonal surfaces, etc.

[0056] Preferably, the end of the transmission bushing 260 is provided with an outwardly protruding snap-fit ​​portion 261, and the end of the locking nut 270 is provided with a snap-fit ​​groove 271. The snap-fit ​​portion 261 and the snap-fit ​​groove 271 are engaged and connected to ensure that the locking nut 270 can drive the transmission bushing 260 to move axially along the motor output shaft 251, and the locking nut 270 and the transmission bushing 260 are detachably connected.

[0057] Preferably, it also includes a motor housing 252, and the motor 250 is disposed inside the motor housing 252 and connected to the connecting rod bracket 210 through the motor housing 252.

[0058] Preferably, it also includes a driven linkage mechanism 300, which is configured as a freely movable multi-link mechanism. One end of the driven linkage mechanism 300 is used to mount the pedal 100 and the other end is used to connect to the vehicle body. The driven linkage mechanism 300 and the active linkage mechanism 200 are located on the same side of the pedal 100.

[0059] The technical means disclosed in this invention are not limited to those described above, but also include technical solutions composed of any combination of the above technical features. The above are specific embodiments of this invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

[0060] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0061] Furthermore, in this invention, descriptions involving terms such as "first," "second," and "a" are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0062] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0063] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Claims

1. A shaft transmission mechanism for an automotive electric pedal motor, characterized in that, include: pedal; An active linkage mechanism includes a linkage bracket, a connecting plate assembly, and a base frame. The pedal is mounted on the base frame. The base frame, the connecting plate assembly, and the linkage bracket are sequentially hinged to form a multi-link mechanism. The linkage bracket is used to connect to the vehicle body. A drive shaft is inserted into the connecting plate assembly and is linked to the connecting plate assembly. An electric motor having an output shaft, wherein the output shaft is inserted into the drive shaft and is clearance-fitted with the drive shaft with an installation gap between them; A transmission bushing is fitted onto the motor output shaft and inserted into the installation gap. The inner and outer end faces of the transmission bushing are respectively linked to the motor output shaft and the transmission shaft. A locking nut is provided, the end of which is detachably connected to the transmission bushing. The locking nut is threadedly connected to the end of the motor output shaft. As the locking nut is turned, the transmission bushing is inserted into or moved out of the installation gap.

2. The automotive electric pedal motor shaft transmission mechanism according to claim 1, characterized in that, The connecting plate assembly includes an outer connecting plate and an inner connecting plate. The two ends of the outer connecting plate are respectively hinged to the connecting rod bracket and the base frame, and the two ends of the inner connecting plate are respectively hinged to the connecting rod bracket and the base frame.

3. The automotive electric pedal motor shaft transmission mechanism according to claim 2, characterized in that, When the motor is not installed on the linkage bracket, the linkage bracket, the outer connecting plate, the base frame, and the inner connecting plate form a freely movable four-bar linkage mechanism.

4. The automotive electric pedal motor shaft transmission mechanism according to claim 2, characterized in that, The motor output shaft is arranged in a stepped shape and has a large diameter section, a medium diameter section and a small diameter section, wherein the small diameter section passes through the drive shaft and extends outward.

5. The automotive electric pedal motor shaft transmission mechanism according to claim 4, characterized in that, The large-diameter portion is clearance-fitted with the drive shaft, the medium-diameter portion forms the installation gap with the drive shaft, and the small-diameter portion is used for threaded connection with the lock nut.

6. The automotive electric pedal motor shaft transmission mechanism according to claim 5, characterized in that, When the transmission bushing is inserted into the installation gap, the motor output shaft transmits torque to the transmission shaft through the transmission bushing. The transmission shaft is interference-fitted with the inner connecting plate and hinged to the connecting rod bracket.

7. The automotive electric pedal motor shaft transmission mechanism according to claim 1, characterized in that, The motor output shaft and the transmission bushing, as well as the transmission bushing and the transmission shaft, can be fitted using splines, gears, or polygonal surfaces.

8. The automotive electric pedal motor shaft transmission mechanism according to claim 1, characterized in that, The end of the transmission bushing is provided with an outwardly protruding snap-fit ​​part, and the end of the locking nut is provided with a snap-fit ​​groove, and the snap-fit ​​part is engaged with the snap-fit ​​groove.

9. The automotive electric pedal motor shaft transmission mechanism according to claim 1, characterized in that, It also includes a motor housing, the motor being disposed inside the motor housing and connected to the connecting rod bracket through the motor housing.

10. The automotive electric pedal motor shaft transmission mechanism according to claim 1, characterized in that, It also includes a driven linkage mechanism, which is configured as a freely movable multi-link mechanism. One end of the driven linkage mechanism is used to install the pedal and the other end is used to connect to the vehicle body. The driven linkage mechanism and the active linkage mechanism are located on the same side of the pedal.

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