Driving assembly of electronic rear dialing device and electronic rear dialing device

Abstract

The utility model discloses a driving assembly of an electronic rear shifting device and the electronic rear shifting device. The electronic rear shifting device comprises a base, a movable assembly, an outer connecting rod and a driving assembly, wherein the base is constructed into a parallelogram connecting rod mechanism; the base is fixedly installed on a frame, one end of the outer connecting rod and one end of the driving assembly are both pivoted to the base, and the other end of the outer connecting rod and the other end of the driving assembly are both pivoted to one side of the movable assembly. The movable assembly is configured as an output end; a motor and a gear set are arranged in the driving assembly; the gear set comprises a first-stage gear, a second-stage gear, a third-stage gear and an output gear which are sequentially connected, and the tooth diameters of the gears are sequentially increased. An output shaft of the motor is in transmission connection with the primary gear, and an output gear is pivoted to the base; a sensor used for detecting the rotation angle of the second-stage gear is correspondingly arranged in the axial direction of the second-stage gear. According to the utility model, the rotation angle of the secondary gear is detected through the sensor, the rotatable angle of the secondary gear is large, and the device has the advantages of small reading error and high fine adjustment precision.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle accessories, in particular to a driving component of an electronic rear derailleur device and an electronic rear derailleur device. Background Art

[0002] For human-powered vehicles with speed-changing functions, such as mountain bikes, the speed change is mainly achieved by controlling the electronic rear derailleur through an electronic shifter to move the chain between multiple sprockets of different diameters on the speed gear plate, thereby achieving the purpose of gear shifting.

[0003] The movement of the electronic rear derailleur is driven by the drive assembly, which is a component in the electronic rear derailleur. The drive assembly is usually driven by a transmission method that cooperates with a motor and a gear set. The rotation angle of the gear set needs to be detected during each gear shift to ensure the accuracy of each gear shift. Utility Model Content

[0004] The utility model aims to provide a driving assembly of an electronic rear derailleur and an electronic rear derailleur, aiming to solve the problem that the detection accuracy of the rotational movement of the existing electronic rear derailleur is low during the process of rotating the rotational movement to achieve gear shifting.

[0005] In order to solve the above technical problems, the purpose of the utility model is achieved through the following technical solutions: to provide a driving assembly of an electronic rear derailleur device, the electronic rear derailleur device comprising: a base constructed as a parallelogram linkage mechanism, a movable assembly, an outer connecting rod and a driving assembly; the base is fixedly mounted on the frame, one end of the outer connecting rod and the driving assembly are both pivotally connected to the base, and the other ends of the outer connecting rod and the driving assembly are both pivotally connected to one side of the movable assembly; the movable assembly is constructed as the output end of the parallelogram linkage mechanism; a motor and a gear set are arranged in the driving assembly; the gear set comprises a primary gear, a secondary gear, a tertiary gear and an output gear which are connected in sequence and whose tooth diameters increase in sequence; the output shaft of the motor is transmission-connected to the primary gear, and the output gear is pivotally connected to the base; wherein a sensor for detecting the rotation angle of the secondary gear is correspondingly arranged on the axial direction of the secondary gear.

[0006] Furthermore, the rotatable angle of the secondary gear is not less than 3 turns; the rotatable angle of the secondary gear is at least 30 times greater than the rotatable angle of the output gear.

[0007] Furthermore, the output shaft of the motor is provided with a gear and is meshedly connected with the large gear end of the primary gear, the small gear end of the primary gear is meshedly connected with the large gear end of the secondary gear, the small gear end of the secondary gear is meshedly connected with the large gear end of the tertiary gear, and the small gear end of the tertiary gear is meshedly connected with the output gear.

[0008] Furthermore, a control board located at the bottom of the gear set is configured in the driving component, and the sensor includes an encoder chip arranged on the control board; a magnet is installed in the axial direction of the secondary gear, and the magnet corresponds to the encoder chip in the axial direction of the secondary gear.

[0009] Furthermore, a mounting plate is arranged in the driving assembly, the motor is mounted on the top of the mounting plate via a motor mounting seat, the gear set is rotatably mounted on the top of the mounting plate via a rotating shaft; and the control board is mounted on the bottom of the mounting plate.

[0010] Furthermore, the rotating shaft of the secondary gear passes through the bottom of the mounting plate and is provided with a magnet seat, and the magnet is fixedly mounted in the magnet seat.

[0011] Furthermore, the output shaft of the motor is arranged perpendicularly to the rotating shaft of the primary gear, and the gear on the output shaft of the motor is a screw gear; and the large gear end of the primary gear is a helical gear.

[0012] Furthermore, the housing of the driving assembly comprises an upper housing and a lower housing which are connected to each other and cover each other; the mounting plate is fixed to the upper housing by screws.

[0013] Furthermore, the upper shell is constructed as a metal part; and the lower shell is constructed as a plastic part.

[0014] The embodiment of the utility model further provides an electronic rear derailleur device, comprising the driving assembly of the electronic rear derailleur device as described above.

[0015] The embodiment of the utility model provides a driving assembly of an electronic rear derailleur device, which includes: a base, a movable assembly, an outer connecting rod and a driving assembly constructed as a parallelogram linkage mechanism; the base is fixedly mounted on a vehicle frame, one end of the outer connecting rod and the driving assembly are both pivotally connected to the base, and the other end of the outer connecting rod and the driving assembly are both pivotally connected to one side of the movable assembly; the movable assembly is constructed as the output end of the parallelogram linkage mechanism; a motor and a gear set are arranged in the driving assembly; the gear set includes a primary gear, a secondary gear, a tertiary gear and an output gear which are connected in sequence and have tooth diameters that increase in sequence; the output shaft of the motor is connected to the primary gear in a transmission manner, and the output gear is pivotally connected to the base; wherein a sensor for detecting the rotation angle of the secondary gear is correspondingly arranged on the axial direction of the secondary gear. The utility model detects the rotation angle of the secondary gear through a sensor, and at each shift, the rotatable angle of the secondary gear is larger, the angle error read during actual rotation will be smaller, and the larger the rotatable angle, the higher the accuracy when fine-tuning the rotation angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the overall structure of the electronic rear derailleur device provided by an embodiment of the utility model;

[0018] Figure 2 A schematic diagram of the partial structure of an electronic rear derailleur device provided by an embodiment of the utility model;

[0019] Figure 3 A schematic diagram of the exploded structure of the drive assembly provided in an embodiment of the utility model;

[0020] Figure 4 The embodiment of the utility model provides Figure 3 Schematic diagram of the local structure in;

[0021] Figure 5 The embodiment of the utility model provides Figure 4 Schematic diagram of the structure behind the hidden motor mounting base.

[0022] Description of the symbols in the figure:

[0023] 1. Base;

[0024] 2. Active components;

[0025] 3. External connecting rod;

[0026] 4. Drive assembly; 41. Upper shell; 42. Lower shell; 43. Mounting plate; 44. Motor; 441. Motor mounting seat; 442. Screw gear; 45. Gear set; 451. Primary gear; 452. Secondary gear; 4521. Magnet seat; 4522. Magnet; 453. Third gear; 454. Output gear; 46. Control board; 461. Encoder chip;

[0027] 5. Chain guide;

[0028] 6. Electronic control components. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0031] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0032] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0033] Combination Figure 1-2 The embodiment of the utility model provides a driving assembly 4 of an electronic rear derailleur device, and the electronic rear derailleur device comprises: a base 1, a movable assembly 2, an outer connecting rod 3 and a driving assembly 4 which are constructed as a parallelogram linkage mechanism; the base 1 is fixedly mounted on the frame, one end of the outer connecting rod 3 and the driving assembly 4 are both pivotally connected to the base 1, and the other ends of the outer connecting rod 3 and the driving assembly 4 are both pivotally connected to one side of the movable assembly 2; the movable assembly 2 is constructed as the output end of the parallelogram linkage mechanism;

[0034] Combination Figure 3-5 The driving assembly 4 is provided with a motor 44 and a gear set 45; the gear set 45 includes a primary gear 451, a secondary gear 452, a tertiary gear 453 and an output gear 454 which are connected in sequence and whose tooth diameters increase in sequence; the output shaft of the motor 44 is transmission-connected with the primary gear 451, and the output gear 454 is pivotally connected to the base 1; wherein, a sensor for detecting the rotation angle of the secondary gear 452 is correspondingly arranged on the axial direction of the secondary gear 452.

[0035] In this embodiment, the base 1 is fixedly mounted on the frame along the mounting axis A (i.e., substantially parallel to the horizontal direction), so that the entire electronic rear derailleur device is fixedly attached to the frame, and the base 1, the movable assembly 2, the outer link 3 and the driving assembly 4 are pivotally connected by four pivot pins, thereby forming a parallelogram linkage mechanism to ensure the mobility of the parallelogram linkage mechanism; and the movable assembly 2 is pivotally connected to the chain guide 5 which is transmission-connected to the speed gear plate (not shown in the figure) of the frame; gear shifting can be achieved by driving the chain guide 5 on different sprockets of the speed gear plate through the movement of the quadrilateral linkage mechanism.

[0036] In this embodiment, the motor 44 and the gear set 45 are used to rotate the drive assembly 4. Starting from the output shaft of the motor 44, the torque force is sequentially transmitted to the primary gear 451, the secondary gear 452, the tertiary gear 453 and the output gear 454, and the final output gear 454 is used as the output to realize the rotation around the corresponding pivot pin. In this process, because the tooth diameters of the primary gear 451, the secondary gear 452, the tertiary gear 453 and the output gear 454 are sequentially increased, when each gear rotates, the rotatable angle of each gear increases sequentially, so the sensor for detecting the rotation angle can be set on the axial direction of the primary gear 451 or the secondary gear 452; in this embodiment, it is preferably set on the axial direction of the secondary gear 452. Therefore, at each shift, the rotatable angle of the secondary gear 452 is larger, the angle error read during actual rotation will be smaller, and the larger the rotatable angle, the higher the accuracy when fine-tuning the rotation angle.

[0037] To facilitate understanding of the effect of this embodiment, a comparison is made by setting the sensor on the secondary gear 452 and the tertiary gear 453; if the sensor is set on the tertiary gear 453, the angle accuracy read relative to the final output gear 454 is equal to the transmission ratio of the third stage, and if the sensor is set on the secondary gear 452, the angle accuracy read relative to the final output gear 454 is equal to the product of the transmission ratio of the secondary gear 452 and the transmission ratio of the tertiary gear 453; therefore, after the sensor is set on the secondary gear 452 in this embodiment, the rotation angle detected at each gear shift is more accurate, and the accuracy of the rotation angle fine-tuning is also higher, thereby ensuring the accuracy of each gear shift.

[0038] Combination Figure 4 and Figure 5 In some specific embodiments, the rotatable angle of the secondary gear 452 is not less than 3 turns; the rotatable angle of the secondary gear 452 is at least 30 times greater than the rotatable angle of the output gear 454. That is, the rotatable angle of the secondary gear 452 is not less than 720 degrees, and the rotatable angle of the output gear 454 is not less than 24 degrees; it should be understood that the transmission ratio (ratio of the rotatable angle) from the secondary gear 452 to the output gear 454 has a large torque force and can provide a stable driving force. Preferably, the rotatable angle of the secondary gear 452 can be set to 3 turns; the rotatable angle of the output gear 454 can be set to 24 degrees.

[0039] In some more specific embodiments, the output shaft of the motor 44 is perpendicularly arranged to the rotating shaft of the first-stage gear 451 , and the gear on the output shaft of the motor 44 is a screw gear 442 ; the large gear end of the first-stage gear 451 is a helical gear.

[0040] In this specific embodiment, the first gear 451, the second gear 452 and the third gear 453 are all reduction gears integrally provided with a large gear end and a small gear end; it should be understood that the screw gear 442 of the output shaft of the motor 44 is meshedly connected with the large gear end of the first gear 451, the small gear end of the first gear 451 is meshedly connected with the large gear end of the second gear 452, the small gear end of the second gear 452 is meshedly connected with the large gear end of the third gear 453, and the small gear end of the third gear 453 is meshedly connected with the output gear 454. Thus, a reduction mechanism is formed; the entire transmission ratio from the output shaft of the motor 44 to the output gear 454 is at least 1 / 340, thereby achieving stable rotation drive.

[0041] Combination Figure 4 and Figure 5 In one embodiment, a control board 46 located at the bottom of the gear set 45 is configured in the driving component 4, and the sensor includes an encoder chip 461 arranged on the control board 46; a magnet 4522 is installed in the axial direction of the secondary gear 452, and the magnet 4522 corresponds to the encoder chip 461 in the axial direction of the secondary gear 452.

[0042] In this embodiment, the magnet 4522 is assembled on the axial direction of the secondary gear 452, and can rotate synchronously with the secondary gear 452. Correspondingly, the control board 46 is set at the bottom of the gear group 45, and the encoder chip 461 corresponding to the magnet 4522 is set on the control board 46. In this way, when the magnet 4522 rotates synchronously with the secondary gear 452, the encoder chip 461 can be used to accurately detect the rotation angle.

[0043] In one embodiment, a mounting plate 43 is disposed in the driving assembly 4, a motor 44 is mounted on the top of the mounting plate 43 through a motor mounting seat 441, a gear set 45 is rotatably mounted on the top of the mounting plate 43 through a rotating shaft; and a control board 46 is mounted on the bottom of the mounting plate 43.

[0044] In this embodiment, the mounting plate 43 is arranged to divide the internal space of the driving component 4 into upper and lower spaces, the motor 44 and the gear set 45 are mounted on the top surface of the mounting plate 43, and the control board 46 is mounted on the bottom surface of the mounting plate 43, thereby forming a whole, which is convenient for installation inside the driving component 4.

[0045] Combination Figure 4 and Figure 5In one embodiment, the shaft of the secondary gear 452 passes through the bottom of the mounting plate 43 and is provided with a magnet seat 4521, in which the magnet 4522 is fixedly mounted. A magnet seat 4521 having a circular groove may be provided on one end of the shaft of the secondary gear 452 that passes through the bottom of the mounting plate 43, and the shape of the magnet 4522 is adapted to the circular groove and can be fixedly embedded in the circular groove by gluing. It should be understood that the center of the circular groove is coaxially arranged with the shaft of the secondary gear 452, so as to avoid eccentric rotation of the magnet 4522 and ensure the detection accuracy of the rotation angle.

[0046] Combination Figure 3 In one embodiment, the housing of the driving assembly 4 includes an upper shell 41 and a lower shell 42 that are covered and connected to each other; the mounting plate 43 is fixed to the upper shell 41 by screws; the upper shell 41 is constructed as a metal part; and the lower shell 42 is constructed as a plastic part.

[0047] In this embodiment, a plurality of threaded holes can be provided on the outer edge of the upper shell 41, and correspondingly, a plurality of corresponding mounting through holes can be provided on the outer edge of the lower shell 42, and screws are passed through the mounting through holes and then threadedly fixed in the corresponding threaded holes, so as to cover and connect the upper shell 41 and the lower shell 42. The outer shell of the driving component 4 is constructed to function as the inner connecting rod of the parallelogram linkage mechanism. When the outer shell of the driving component 4 replaces the inner connecting rod for movement, it is necessary to ensure sufficient strength. Therefore, the upper shell 41 is constructed of metal materials as a metal part to ensure strength, and the lower shell 42 is constructed of plastic materials as a plastic part to facilitate the installation of internal components and reserve wire ports for wiring with the outside.

[0048] In one embodiment, an electric control component 6 is disposed inside the base 1 ; the electric control component 6 is electrically connected to the control board 46 , and the electric control component 6 is used to output a gear shift control signal to the control board 46 .

[0049] In this embodiment, one end of the driving component 4 is pivotally connected to the inner side of the base 1, and the electric control component 6 is arranged on the inner side of the base 1, so that the electric control component 6 and the driving component 4 are relatively close, and the wiring is simpler. A wireless module can be arranged in the electric control component 6, and after receiving the speed control signal through the wireless module, it is output to the control board 46, and then the control board 46 controls the electric control gear to perform motion control, thereby realizing speed change and gear shifting.

[0050] The embodiment of the utility model further provides an electronic rear derailleur device, comprising the driving assembly of the electronic rear derailleur device as described above.

[0051] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A driving assembly of an electronic rear derailleur, the electronic rear derailleur comprising: A base, a movable assembly, an outer connecting rod and a driving assembly constructed as a parallelogram linkage mechanism; The base is fixedly mounted on the vehicle frame, one end of the outer connecting rod and the driving assembly are both pivotally connected to the base, and the other ends of the outer connecting rod and the driving assembly are both pivotally connected to one side of the movable assembly; the movable assembly is constructed as the output end of a parallelogram linkage mechanism; it is characterized in that: The drive assembly is provided with a motor and a gear set; the gear set comprises a primary gear, a secondary gear, a tertiary gear and an output gear which are connected in sequence and whose tooth diameters increase in sequence; the output shaft of the motor is transmission-connected to the primary gear, and the output gear is pivotally connected to the base; wherein a sensor for detecting the rotation angle of the secondary gear is correspondingly arranged on the axial direction of the secondary gear.

2. The driving assembly of the electronic rear derailleur device according to claim 1, characterized in that: The rotatable angle of the secondary gear is not less than 3 turns; the rotatable angle of the secondary gear is at least 30 times greater than the rotatable angle of the output gear.

3. The driving assembly of the electronic rear derailleur device according to claim 1, characterized in that: The output shaft of the motor is provided with a gear and is meshed and connected with the large gear end of the primary gear, the small gear end of the primary gear is meshed and connected with the large gear end of the secondary gear, the small gear end of the secondary gear is meshed and connected with the large gear end of the tertiary gear, and the small gear end of the tertiary gear is meshed and connected with the output gear.

4. The driving assembly of the electronic rear derailleur device according to claim 1, characterized in that: A control board located at the bottom of the gear set is configured in the driving component, and the sensor includes an encoder chip arranged on the control board; a magnet is installed on the axial direction of the secondary gear, and the magnet corresponds to the encoder chip on the axial direction of the secondary gear.

5. The driving assembly of the electronic rear derailleur device according to claim 4, characterized in that: The drive assembly is provided with a mounting plate, the motor is mounted on the top of the mounting plate via a motor mounting seat, the gear set is rotatably mounted on the top of the mounting plate via a rotating shaft; and the control board is mounted on the bottom of the mounting plate.

6. The driving assembly of the electronic rear derailleur device according to claim 5, characterized in that: The rotating shaft of the secondary gear passes through the bottom of the mounting plate and is provided with a magnet seat, in which the magnet is fixedly mounted.

7. The driving assembly of the electronic rear derailleur device according to claim 2, characterized in that: The output shaft of the motor is arranged perpendicularly to the rotating shaft of the primary gear, the gear on the output shaft of the motor is a screw gear; and the large gear end of the primary gear is a helical gear.

8. The driving assembly of the electronic rear derailleur device according to claim 5, characterized in that: The housing of the driving assembly comprises an upper housing and a lower housing which are connected to each other and cover each other; the mounting plate is fixed to the upper housing by screws.

9. The driving assembly of the electronic rear derailleur device according to claim 8, characterized in that: The upper shell is constructed as a metal part; the lower shell is constructed as a plastic part.

10. An electronic rear derailleur device, characterized in that: The invention comprises a driving assembly of the electronic rear derailleur device as claimed in any one of claims 1 to 9.

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