A wheel hub motor control device

Abstract

This utility model discloses a control release device for a hub motor, including a main shaft pivotally mounted on a hub shell. The inner end of the main shaft has a groove and a coil groove surrounding the groove. An electromagnetic coil is disposed in the coil groove, and a pressure sleeve is disposed in the groove. A channel for an unlocking bolt to pass through is provided at the axial center of the main shaft, and the channel communicates with the groove. The pressure sleeve is connected to the unlocking bolt and an armature plate. The armature plate is electromagnetically braked by the electromagnetic coil. A tactile switch electrically connected to a controller is disposed in the groove. In electric unlocking mode, the electromagnetic coil attracts the armature plate, causing the pressure sleeve to move axially outward, and the pressure sleeve does not contact the tactile switch. In manual unlocking mode, rotating the unlocking bolt pushes the pressure sleeve outward, causing the pressure sleeve to contact the tactile switch. The tactile switch sends a signal to the controller to prevent the electric wheelchair from being accidentally started in manual unlocking mode.

Description

Technical Field

[0001] This utility model belongs to the field of hub motors and relates to a decontrol device for hub motors. Background Technology

[0002] In the field of electric wheelchairs, the performance of the hub motor is crucial to the user experience. CN108270318B discloses an electric wheelchair hub motor equipped with a built-in electromagnetic braking device, a design that significantly improves the safety and reliability of the wheelchair. Under normal operating conditions, the electromagnetic braking device relies on the electromagnetic attraction generated by the electromagnetic coil to achieve the braking function, effectively ensuring the user's safety when stopping the vehicle.

[0003] However, when the electromagnetic attraction of the electromagnetic coil fails, such as in the event of damage or loss of control, a method can be used to reduce the pushing resistance of the electric wheelchair. This involves unscrewing the unlocking bolt outwards, causing the pressure sleeve to move outwards against the force of the first spring, thus reducing the friction between the two friction discs and lowering the rotational resistance of the output shaft. However, this method has significant drawbacks. Forcibly unlocking the bolt will cause the hub motor to lose its braking ability. If the user forgets to restore it during use, subsequent riding will face significant safety hazards. Utility Model Content

[0004] The purpose of this invention is to provide a control release device for a hub motor, which enables the hub motor to be powered off in manual unlocking mode, thereby preventing the electric wheelchair from being accidentally started in unlocking mode.

[0005] The objective of this utility model is achieved through the following technical solution: A hub motor release device includes a main shaft pivotally mounted on a hub housing. The main shaft has a groove at its inner end and a coil groove surrounding the groove. An electromagnetic coil is disposed within the coil groove. A pressure sleeve is disposed within the groove. A channel for an unlocking bolt to pass through is located at the axial center of the main shaft, and the channel communicates with the groove. The pressure sleeve is connected to the unlocking bolt and an armature plate. The armature plate is electromagnetically braked by the electromagnetic coil. A tactile switch electrically connected to a controller is disposed within the groove. In electric unlocking mode, the electromagnetic coil attracts the armature plate, causing the pressure sleeve to move axially outward, and the pressure sleeve does not contact the tactile switch. In manual unlocking mode, rotating the unlocking bolt pushes the pressure sleeve outward, causing it to contact the tactile switch, and the tactile switch sends a signal to the controller.

[0006] Based on the movement of the pressure sleeve when the electromagnetic coil attracts the armature plate, and the movement of the pressure sleeve when the unlocking bolt moves the pressure sleeve, the distance between the pressure sleeve and the bottom of the groove is different in the two modes. Adjusting the position of the pressure sleeve deeper by using the unlocking bolt brings it closer to the bottom of the groove, resulting in a gap difference of 0.3~0.5 mm. Based on this gap difference, a tactile switch is installed inside the groove. Whether the tactile switch is triggered determines whether the hub motor is in electric or manual unlocking mode. The controller uses the received tactile switch signal to determine whether to supply power to the hub motor, preventing the electric wheelchair from accidentally starting in manual unlocking mode.

[0007] As a further improvement of one embodiment of the present invention, the large shaft is provided with a wiring channel for the tactile switch pins, and the wiring channel is connected to the wiring channel of the electromagnetic coil.

[0008] As a further improvement of one embodiment of the present invention, the tactile switch is disposed at the bottom of the groove or in the slot of the side plate of the groove, and the pressure sleeve has a support leg extending into the slot.

[0009] As a further improvement of one embodiment of this utility model, the tactile switch is a normally closed switch.

[0010] The above technical solution has the following beneficial effects: by setting a tactile switch in the groove, the controller can determine the status of the hub motor according to the on / off state of the tactile switch. In the electric unlocking mode, the hub motor is powered normally, and in the manual unlocking mode, the power supply to the hub motor is stopped, thus preventing the electric wheelchair from being started unexpectedly. Attached Figure Description

[0011] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0012] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0013] Figure 1 A schematic diagram of the first state structure provided by this utility model.

[0014] Figure 2 for Figure 1 An enlarged schematic diagram of region A in the middle.

[0015] Figure 3 This is a schematic diagram showing the second possible placement of a tactile switch.

[0016] In the picture: 1. Wheel hub shell; 2. Main shaft; 21. Groove; 3. Unlock the bolts; 4. The first spring; 5. Pressure sleeve; 6. Armature plate; 7. Electromagnetic coil; 8. Touch switch; 9. Support legs. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0019] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model. Example

[0020] See Figures 1-3 As shown, a hub motor release device includes a large shaft 2 pivotally mounted on a hub housing 1. The inner end of the large shaft 2 has a groove 21 and a coil groove surrounding the groove 21. An electromagnetic coil 7 is disposed in the coil groove. A pressure sleeve 5 is disposed in the groove 21. A bolt hole for an unlocking bolt 3 to pass through is located at the axial center of the large shaft 2, communicating with the groove 21. The pressure sleeve 5 is connected to the unlocking bolt 3 and an armature plate 6. The armature plate 6 is electromagnetically braked by the electromagnetic coil 7. A first spring 4 is disposed in the groove 21, with one end abutting against the pressure sleeve 5 and the other end abutting against the bottom of the groove 21. This is based on existing technology (see patent CN108270318B).

[0021] This invention makes key improvements based on the above. A tactile switch 8 electrically connected to the controller is provided in the groove 21. By determining whether the tactile switch 8 is triggered, it is determined whether the hub motor is in electric unlocking mode or manual unlocking mode, so that the controller of the electric wheelchair can provide targeted power supply control to the hub motor to ensure the riding safety of the consumer.

[0022] Specifically, in the electric unlocking mode, the electromagnetic coil 7 generates electromagnetic attraction to the armature plate 6, which in turn drives the pressure sleeve 5 to move axially outward. At this time, the pressure sleeve 5 is not in contact with the tactile switch 8. However, when entering the manual unlocking mode, by rotating the unlocking bolt 3, the unlocking bolt 3 pushes the pressure sleeve 5 outward, causing the pressure sleeve 5 to contact the tactile switch 8. The tactile switch 8 then sends a signal to the random controller.

[0023] From a mechanical perspective, the position of the pressure sleeve 5 when the electromagnetic coil 7 attracts the armature disk 6 differs from the position when the unlocking bolt 3 moves the pressure sleeve 5. Specifically, the distance between the pressure sleeve 5 and the bottom of the groove 21 differs in the two modes. The unlocking bolt 3 adjusts the pressure sleeve 5 deeper, bringing it closer to the bottom of the groove 21. There is a gap difference of 0.3-0.5mm between the two modes. It is based on this gap difference that the tactile switch 8, appropriately positioned at the bottom of the groove, can identify the two modes.

[0024] In practical applications, this design has several equivalent implementation methods. For example, the installation method of the tactile switch 8 is not limited to being directly fixed to the bottom of the groove. It can also be installed on the side wall of the groove. A slot is cut in the side wall of the groove, the tactile switch 8 is placed in it, and then a support leg 9 is fixed on the pressure sleeve 5. The tactile switch 8 is triggered by the support leg 9. As long as it can be accurately triggered when the pressure sleeve 5 reaches the corresponding position, it is acceptable.

[0025] The controller determines the mode of the hub motor by whether the touch switch 8 is triggered. After receiving the signal, the controller determines whether to supply power to the hub motor, which effectively prevents the electric wheelchair from being accidentally started in manual unlocking mode, greatly improving the safety of using the electric wheelchair and providing consumers with more reliable protection.

[0026] In the control device of the hub motor, a special design was implemented on the main shaft 2 to ensure the normal operation of the tactile switch 8 and a reasonable wiring layout. The main shaft 2 has a wiring channel for the pins of the tactile switch 8. This wiring channel is not independent but connected to the wiring channel of the electromagnetic coil 7. This design makes the overall wiring layout of the hub motor more compact and concise, reduces unnecessary exposed wiring, lowers the risk of wiring damage, and improves the reliability and stability of the device.

[0027] In this embodiment, the tactile switch 8 is a normally closed switch. In the electric unlocking mode, the pressure sleeve 5 does not contact the tactile switch 8, the normally closed switch is closed, and the original state of the circuit is not affected; when entering the manual unlocking mode, the pressure sleeve 5 contacts the tactile switch 8, the normally closed switch is opened and sends a signal to the controller so that the controller can make corresponding power supply control to ensure the safety of using the electric wheelchair.

[0028] This invention cleverly incorporates a tactile switch within the groove 21, providing precise information for determining the status of the hub motor. The controller receives the on / off status signal from the tactile switch in real time. In electric unlocking mode, the tactile switch is not triggered, indicating that the controller determines the hub motor is in a normal operating state and supplies it with power to ensure normal operation of the electric wheelchair. In manual unlocking mode, the pressure sleeve activates the tactile switch, changing its status. Upon recognition, the controller immediately stops supplying power to the hub motor, improving the safety of riding the electric wheelchair.

[0029] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0030] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A control release device for a hub motor, comprising a main shaft pivotally mounted on a hub housing, the inner end of the main shaft having a groove and a coil groove surrounding the groove, an electromagnetic coil disposed in the coil groove, a pressure sleeve disposed in the groove, a channel for an unlocking bolt to pass through being provided at the axial center of the main shaft, the channel communicating with the groove, the pressure sleeve being connected to the unlocking bolt, the pressure sleeve being connected to an armature plate, and the armature plate being electromagnetically braked by the electromagnetic coil; characterized in that... A tactile switch electrically connected to the controller is provided in the groove; in the electric unlocking mode, the electromagnetic coil attracts the armature plate, causing the pressure sleeve to move axially outward, and the pressure sleeve does not contact the tactile switch; in the manual unlocking mode, the pressure sleeve is pushed outward by rotating the unlocking bolt, so that the pressure sleeve contacts the tactile switch, and the tactile switch sends a signal to the controller.

2. The de-control device according to claim 1, characterized in that, The main shaft is provided with a wiring channel for the tactile switch pins, and the wiring channel is connected to the wiring channel of the electromagnetic coil.

3. The de-control device according to claim 2, characterized in that, The tactile switch is located at the bottom of the groove or in the slot of the side plate of the groove, and the pressure sleeve has a support leg extending into the slot.

4. The de-control device according to claim 1, characterized in that, The tactile switch is a normally closed switch.

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