Electromagnetic brake structure and electric wheelchair

Abstract

This application relates to the field of braking equipment technology, and in particular to an electromagnetic braking structure. The braking structure includes a first electromagnetic drive module, a control rod, an elastic element, and a locking element. The braking structure uses the first electromagnetic drive module to energize and drive the control rod away from the brake pads, causing the pressure plate at the bottom of the control rod to separate from the brake pads and release the brake. The locking element includes a locking rod and a latch. One end of the locking rod is connected to the locking portion of the control rod, and the other end of the locking rod is locked and fixed by the latch to maintain the control rod in a locked state. In this locked state, the first electromagnetic drive module can be de-energized to maintain the released state of the electromagnetic braking structure, effectively saving power consumption of the first electromagnetic drive module. When the locked state is released, the latch releases the locked rod, and the control rod and its bottom pressure plate abut against the brake pads under the elastic force applied by the elastic element, achieving braking of the electromagnetic braking structure.

Description

Technical Field

[0001] This application relates to the field of braking equipment technology, and in particular to an electromagnetic braking structure. Background Technology

[0002] Electric wheelchairs, also known as electric wheelchair scooters, are mobility aids for special groups such as the disabled, the elderly, and patients undergoing clinical rehabilitation. During use, wheelchairs often require braking, which is typically achieved using brake pads or electromagnetic brakes. Existing electromagnetic brakes usually use an electromagnetic drive module's iron core to drive a pressure plate against the brake pads. While this achieves braking of the wheelchair motor, the electromagnetic drive module must remain continuously energized to ensure the pressure plate is constantly pressed against the brake pads, resulting in high power consumption and a relatively reduced range for the electric wheelchair. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides an electromagnetic braking structure and an electric wheelchair, avoiding the problem of high power consumption caused by the need for continuous power supply in existing electromagnetic braking structures in the background art.

[0004] The technical solution provided by this invention is as follows:

[0005] An electromagnetic braking structure includes:

[0006] A control lever with a pressure plate corresponding to the brake pads at one end;

[0007] A first electromagnetic drive module for driving the control lever to move so that the pressure plate separates from the brake pad;

[0008] An elastic element acting on the control lever causes the pressure plate to have a tendency to move closer to the brake pad;

[0009] One end can cooperate with the locking part on the control lever, and has a locking state that prevents the pressure plate from contacting the brake pad and a locking member that releases the locking state.

[0010] The locking element includes a locking rod and a latch; the latch is arranged at one end of the locking rod to limit the movement of the locking rod; the other end of the locking rod is connected to the locking part of the control rod.

[0011] In this application, the locked state refers to the state in which the movement of the control lever is constrained by the locking element, thereby overcoming the elastic force of the elastic element and preventing the pressure plate from contacting the brake pad.

[0012] Furthermore, one end of the locking member can cooperate with the locking part on the control rod, specifically: one end of the locking rod is provided with a cam block structure, the control rod is provided with a mounting groove that matches the cam block structure, and the cam block structure of the locking rod is installed in the mounting groove of the control rod.

[0013] Furthermore, one end of the locking member can cooperate with the locking part on the control rod, specifically: one end of the locking rod is hinged to the control rod.

[0014] Furthermore, one end of the locking member can cooperate with the locking part on the control rod, specifically: the control rod is provided with a groove, and one end of the locking rod is inserted into the groove of the control rod.

[0015] Furthermore, the elastic element is a spring, which is sleeved on the control rod.

[0016] Furthermore, the locking rod is arranged to the side of the control rod, and one end of the locking rod is laterally connected to the locking part of the control rod.

[0017] Furthermore, the latch is rotatably arranged at one end of the locking rod, and a first torsion spring is arranged on the pivot of the latch; the first torsion spring applies torque to the latch to cause the latch to turn and move closer to the locking rod; the latch has a slot that defines the engagement of the end of the locking rod.

[0018] Furthermore, an inclined surface is provided above the slot on the side of the latch slot.

[0019] Furthermore, the electromagnetic brake structure of this application includes a second electromagnetic drive module. The output end of the second drive module is connected to the latch to drive the latch to overcome the torque of the first torsion spring and rotate away from the locking rod, so as to release the locking rod locked by the latch.

[0020] Furthermore, the electromagnetic brake structure of this application includes a balancing component, which includes a base. The base is provided with a mounting slot, and the two opposite sidewalls of the mounting slot are provided with through holes. A pin is inserted into the through hole, and a second torsion spring is provided on the pin. The second torsion spring is used to lock the locking rod.

[0021] Furthermore, the electromagnetic braking structure of this application includes a clamping bolt arranged on the side near the latch above the locking rod. Depending on the tightening depth of the clamping bolt, the bottom end of the clamping bolt abuts against the locking rod, so that the locking rod moves to the latch.

[0022] Furthermore, the electromagnetic braking structure of this application also includes an energy storage element, which is connected to the first electromagnetic drive module and is used to supply power to the first electromagnetic drive module in the event of a power outage.

[0023] This application also provides an electric wheelchair, including the electromagnetic braking structure described above.

[0024] Beneficial effects:

[0025] In the electromagnetic braking structure of this application, the first electromagnetic drive module is energized to drive the control rod away from the brake pad, so that the pressure plate at the bottom of the control rod separates from the brake pad and releases the brake. The locking member includes a locking rod and a locking buckle. One end of the locking rod is connected to the locking part of the control rod, and the other end of the locking rod is locked and fixed by the locking buckle to maintain the locking state of the control rod. In this locked state, the first electromagnetic drive module can be de-energized to maintain the released state of the electromagnetic braking structure, effectively saving the power consumption of the first electromagnetic drive module. When the locked state is released, the locking buckle releases the locking rod, and the control rod and the pressure plate at its bottom abut against the brake pad under the elastic force applied by the elastic member, realizing the braking of the electromagnetic braking structure. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a cross-sectional structural diagram of an electromagnetic brake structure assembled on a motor according to this application.

[0028] Figure 2 This is a schematic diagram of an electromagnetic brake structure assembled into a motor according to this application;

[0029] Figure 3 This is a schematic diagram of the electromagnetic braking structure in the de-braking state according to this application;

[0030] Figure 4 This is a schematic diagram of the electromagnetic braking structure in the braking state according to this application;

[0031] Figure 5 This is a cross-sectional structural schematic diagram of an electromagnetic braking structure in the braking state according to this application;

[0032] Figure 6 yes Figure 2 A schematic diagram of the central locking mechanism.

[0033] Among them, 1. First electromagnetic drive module, 2. Control rod, 3. Pressure plate, 4. Cam block, 5. Locking rod, 6. Elastic element, 7. Lock, 7.1. Slot, 7.2. Inclined surface, 8. First torsion spring, 9. Second torsion spring, 10. Brake pad, 11. Second drive module, 12. Push plate strip, 13. Base plate, 14. Base base, 15. Motor, 15.1. Rear end cover, 16. Reducer. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0036] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0038] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0039] like Figure 1-6As shown, this application provides an electromagnetic brake structure, including: a control rod 2 with a pressure plate 3 corresponding to a brake pad at one end; a first electromagnetic drive module 1 for driving the control rod to move so that the pressure plate 3 separates from the brake pad 10; an elastic member 6 acting on the control rod 2 to make the pressure plate 3 tend to approach the brake pad 10; a locking member at one end that can cooperate with a locking part on the control rod, having a locked state that prevents the pressure plate from contacting the brake pad and an unlocked state; the locking member includes a locking rod 5 and a latch 7; the latch is arranged at one end of the locking rod to limit the movement of the locking rod; the other end of the locking rod is connected to the locking part of the control rod.

[0040] In the above scheme, the first electromagnetic drive module is energized to drive the control lever away from the brake pad, so that the pressure plate at the bottom of the control lever separates from the brake pad and releases the brake. The locking component includes a locking rod and a latch. One end of the locking rod is connected to the locking part of the control lever, and the other end of the locking rod is locked and fixed by the latch to maintain the locking state of the control lever. In this locked state, the first electromagnetic drive module can be de-energized to maintain the released state of the electromagnetic brake structure, effectively saving the power consumption of the first electromagnetic drive module. When the locked state is released, the latch releases the locked rod, and the control lever and the pressure plate at its bottom abut against the brake pad under the elastic force applied by the elastic element, realizing the braking of the electromagnetic brake structure. The locked state in this application refers to: the movement of the control lever is constrained by the action of the locking component, thereby overcoming the elastic force of the elastic element and preventing the pressure plate from contacting the brake pad.

[0041] As an optional embodiment, the elastic element is a spring, which is sleeved on the control rod to apply elastic force to make the control rod and its bottom pressure plate approach the brake pad for braking; the first electromagnetic drive module has a through hole in the middle, and the control rod is inserted into the through hole. The bottom of the control rod is connected to the pressure plate, and the control rod is sleeved with a spring. When the first electromagnetic drive module is energized, it drives the control rod and the pressure plate to overcome the elastic force applied by the spring, so that the pressure plate separates from the brake pad to release the brake.

[0042] As a preferred embodiment of the locking member, one end of the locking member can cooperate with the locking part on the control rod. Specifically, one end of the locking rod 5 is provided with a cam block structure 4, and the control rod is provided with a mounting groove that matches the cam block structure. The cam block structure of the locking rod is installed in the mounting groove of the control rod.

[0043] The locking rod moves in a first direction, and the cam block structure, through its engagement with the mounting groove, drives the control rod to move in a second direction. The locking rod moves in the second direction, and the cam block structure, through its engagement with the mounting groove, drives the control rod to move in the first direction, which is opposite to the second direction. A latch is arranged along the movement path of the locking rod. Locking the locking rod with the latch restricts the movement of the control rod, keeping the pressure plate at the bottom of the control rod separated from the brake pad. When the latch releases the locked rod, in the absence of driving force from the first electromagnetic drive module, the control rod, under the elastic force of the spring, drives the control rod and its bottom pressure plate to abut against the brake pad, thus braking. In this embodiment, the movement path is the trajectory of the locking rod's up-and-down movement. The control rod is preferably made of iron core material, and the first electromagnetic drive module, when energized, can drive the iron core material control rod to move against the elastic force of the spring. In this embodiment, the locking rod moves in either a first direction or a second direction. In the diagram, the brake structure and motor are vertically connected. When the locking rod moves downwards, the cam block structure, through its engagement with the mounting groove, drives the control rod upwards. Conversely, when the locking rod moves upwards, the cam block structure, through its engagement with the mounting groove, drives the control rod downwards. Alternatively, when the brake structure and motor are horizontally connected, the locking rod moves to the left, and the cam block structure, through its engagement with the mounting groove, drives the control rod to the right. Finally, when the locking rod moves to the right, the cam block structure, through its engagement with the mounting groove, drives the control rod to the left.

[0044] When the first electromagnetic drive module is energized, it drives the control lever to move away from the brake pads, causing the pressure plate at the bottom of the control lever to separate from the brake pads and release the brake. The upper part of the control lever is provided with a mounting groove, and the cam block structure at one end of the locking lever is arranged in the mounting groove. It works with the latch at the other end of the locking lever to limit the movement of the locking lever. The control lever is also limited in its movement, maintaining the separation of the control lever and its bottom pressure plate from the brake pads. At the same time, the first electromagnetic drive module can be de-energized, saving power consumption. When braking, the latch releases the locked locking lever, and the control lever and its bottom pressure plate abut against the brake pads under the action of the spring elastic force, thus achieving braking.

[0045] As a feasible embodiment of the locking component, one end of the locking component can cooperate with the locking part on the control rod. Specifically, one end of the locking rod is hinged to the control rod; the other end of the locking rod is provided with a latch. Under the drive of the first electromagnetic drive module, the control rod moves the locking rod closer to the latch and locks it to maintain the separation of the control rod and its bottom pressure plate from the brake pad. At this time, the first electromagnetic drive module can be de-energized to save power consumption.

[0046] As a feasible embodiment of the locking component, one end of the locking component can cooperate with the locking part on the control rod. Specifically, the control rod has a groove, and one end of the locking rod is inserted into the groove of the control rod to limit the movement of the control rod; thereby maintaining the control rod and its bottom pressure plate and brake pad in a separated state, the latch limits the locking of the locking rod, and at this time the first electromagnetic drive module can be de-energized to save power consumption. The locking rod is fitted with a return spring. When the latch releases the locked locking rod, the return spring drives the locking rod to retract, so that the end of the locking rod exits the groove inserted into the control rod.

[0047] In the above-described embodiments of the locking member, preferably the locking rod of the locking member is arranged on the side of the control rod, and one end of the locking rod is laterally connected to the locking part of the control rod; more preferably, the locking rod and the control rod are arranged perpendicular to each other.

[0048] In a preferred embodiment, the latch 7 is rotatably arranged at one end of the locking rod 5, and a first torsion spring 8 is arranged on the pivot of the latch; the first torsion spring applies torque to the latch to cause the latch to turn and move closer to the locking rod; the latch 7 has a slot 7.1, which defines the end of the locking rod to engage, thereby limiting the movement of the locking rod 5. An inclined surface 7.2 is provided above the slot on the latch side, which facilitates the sliding of the locking rod into the latch slot; more preferably, the angle between the inclined surface and the vertical surface on the latch side of the latch is in the range of 30-60 degrees.

[0049] In this embodiment, a base plate 13 is provided on the first electromagnetic drive module, and the upper part of the control rod is set through the base plate. The latch is rotatably connected to the base plate through a rotating shaft. With the rotating shaft as the boundary, the upper part of the latch has a slot. A first torsion spring is provided on the rotating shaft. The first torsion spring applies torque to the latch so that the latch turns closer to the locking rod and locks the locking rod.

[0050] The electromagnetic brake structure of this application includes a second electromagnetic drive module. The output end of the second drive module is connected to the latch, which drives the latch to overcome the torque of the first torsion spring and rotate away from the locking rod to release the locking rod locked by the latch. Preferably, in this embodiment, the iron core outlet end of the second electromagnetic drive module is connected to the lower part of the latch to drive the latch to rotate. More preferably, the second electromagnetic drive module 11 is connected to the latch 7 through a push plate 12. The middle part of the push plate is rotatably pinned to the bottom of the base plate. One end of the push plate abuts against the lower part of the latch, and the other end of the push plate corresponds to the iron core outlet end of the second electromagnetic drive module. The energized iron core of the second electromagnetic drive module pushes the push plate to drive the latch to rotate and release the latch. By adding a rotatable push plate structure, the layout of the second electromagnetic drive module can be optimized, ensuring that the overall braking structure is compact while saving space.

[0051] In a preferred embodiment, the electromagnetic brake structure of this application includes a balancing component, which includes a base 14. The base has a mounting slot and is mounted on a base plate. Two opposite sidewalls of the mounting slot have through holes, through which a pin is inserted. A second torsion spring 9 is mounted on the pin, and the second torsion spring is used to engage the locking rod. More preferably, the pin passes through the locking rod, and the end of the pin has the second torsion spring. The second torsion spring engages the locking rod, applying a downward tendency force. This, in turn, through the cooperation of the cam block structure and the mounting slot, applies an upward tendency force to the control rod, thus counterbalancing the elastic force exerted by the spring on the control rod's downward movement. This helps maintain the balance and stability of the locking rod and reduces the driving force required by the first electromagnetic drive module. The elastic force exerted by the second torsion spring is less than the overall elastic force exerted by the elastic element-spring, but since the locking rod and control rod act as lever arms, they can maintain balance using the lever principle.

[0052] As one feasible embodiment, the electromagnetic brake structure of this application further includes a clamping bolt arranged near the latch side above the locking rod. Depending on the tightening depth of the clamping bolt, the bottom end of the clamping bolt abuts against the locking rod, causing the locking rod to move to the latch, thus enabling manual unlocking of the brake structure. Preferably, the brake structure of this application also includes a protective cover, which is a cylindrical structure with one end closed and the other open. The protective cover is installed on the rear end cover of the motor. The first electromagnetic drive module, control rod, spring, and locking component are all located within the protective cover. The protective cover has a countersunk threaded hole for tightening the clamping bolt; the clamping bolt is installed in the countersunk threaded hole.

[0053] In a preferred embodiment, the electromagnetic braking structure of this application further includes an energy storage element connected to the first electromagnetic drive module. The energy storage element supplies power to the first electromagnetic drive module in the event of a power outage, thereby enabling the electromagnetic braking structure to release. Simultaneously, the energy storage element is also connected to the second electromagnetic drive module, supplying power to the second electromagnetic drive module in the event of a power outage. The energy storage element includes, but is not limited to, a capacitor.

[0054] This application also provides an electric wheelchair, including the aforementioned electromagnetic braking structure. A motor 15 is connected to the wheel axle of the electric wheelchair, providing the wheelchair's propulsion power. The electromagnetic braking structure is located on the rear end cover 15.1 of the motor. The rear end cover is detachably connected to the motor body (including the motor rotor). A brake pad 10, which rotates with the motor shaft, is provided on the motor shaft located on the rear end cover. The pressure plate at the bottom of the control lever in the electromagnetic braking structure corresponds to the brake pad. This electromagnetic braking structure can be directly installed on the rear end cover of the motor, braking the motor's power shaft without altering the structure of the motor 15. The output end of the power shaft in the motor can also be connected to a reducer 16 for speed reduction, without affecting the existing motor's usage requirements and performance. Furthermore, it leverages the existing market application foundation of motors, indicating good development prospects.

[0055] The beneficial effects of the electric wheelchair in this application correspond to the electromagnetic braking structure in this application, and will not be repeated here.

[0056] It should be noted that any parts of the above technical solutions not described in detail are existing technologies.

[0057] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electromagnetic braking structure, characterized in that, include: A control lever with a pressure plate corresponding to the brake pads at one end; A first electromagnetic drive module for driving the control lever to move so that the pressure plate separates from the brake pad; An elastic element acting on the control lever causes the pressure plate to have a tendency to move closer to the brake pad; One end can cooperate with the locking part on the control lever, and has a locking state that prevents the pressure plate from contacting the brake pad and a locking member that releases the locking state; The first electromagnetic drive module is equipped with a base plate, and the upper part of the control rod is set through the base plate. The locking element includes a locking rod and a latch; the latch is arranged at one end of the locking rod to limit the movement of the locking rod; the other end of the locking rod is connected to the locking part of the control rod. The locking rod has a cam block structure at one end, and the control rod has a mounting groove that matches the cam block structure. The cam block structure of the locking rod is installed in the mounting groove of the control rod. The balancing assembly includes a base, which has a mounting slot. The mounting slot has through holes on its two opposite sidewalls. A pin is inserted into the through holes, and a second torsion spring is mounted on the pin. The second torsion spring is used to hold the locking rod. The second torsion spring applies a downward tendency force to the locking rod, which in turn provides an upward tendency force to the control rod through the cooperation of the cam block structure and the mounting groove.

2. The electromagnetic braking structure according to claim 1, characterized in that, One end of the locking member can cooperate with the locking part on the control lever, specifically: One end of the locking rod is hinged to the control rod.

3. The electromagnetic braking structure according to claim 1, characterized in that, One end of the locking member can cooperate with the locking part on the control lever, specifically: The control rod has a groove, and one end of the locking rod is inserted into the groove of the control rod.

4. The electromagnetic braking structure according to any one of claims 1-3, characterized in that, The elastic element is a spring, which is sleeved on the control rod.

5. The electromagnetic braking structure according to claim 4, characterized in that, The locking rod is arranged on the side of the control rod, and one end of the locking rod is laterally connected to the locking part of the control rod.

6. The electromagnetic braking structure according to claim 5, characterized in that, The latch is rotatably arranged at one end of the locking rod, and a first... one A torsion spring; a first torsion spring applies torque to the latch to turn the latch toward the locking bar; the latch has a slot that defines an engagement end of the locking bar.

7. The electromagnetic braking structure according to claim 6, characterized in that, An inclined surface is provided above the slot on the side of the latch slot.

8. The electromagnetic braking structure according to claim 6, characterized in that, It includes a second electromagnetic drive module, the output end of which is connected to the latch to drive the latch to overcome the torque of the first torsion spring and rotate away from the locking bar, so as to release the locking bar locked by the latch.

9. The electromagnetic braking structure according to any one of claims 1-3 and 5-8, characterized in that, It includes a clamping bolt located above the locking rod on the side near the latch. Depending on the tightening depth of the clamping bolt, the bottom end of the clamping bolt abuts against the locking rod, so that the locking rod moves to the latch.

10. The electromagnetic braking structure according to claim 9, characterized in that, It also includes an energy storage element, which is connected to the first electromagnetic drive module and is used to supply power to the first electromagnetic drive module in the event of a power outage.

11. An electric wheelchair, characterized in that, Including the electromagnetic braking structure as described in any one of claims 1-10.

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