CN112910169A - Electric vehicle motor stall protection device and protection method thereof - Google Patents
Electric vehicle motor stall protection device and protection method thereof Download PDFInfo
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- CN112910169A CN112910169A CN202110249474.XA CN202110249474A CN112910169A CN 112910169 A CN112910169 A CN 112910169A CN 202110249474 A CN202110249474 A CN 202110249474A CN 112910169 A CN112910169 A CN 112910169A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
- H02K7/1021—Magnetically influenced friction brakes
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/093—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against increase beyond, or decrease below, a predetermined level of rotational speed
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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Abstract
The invention discloses a motor stall protection device and a protection method of an electric vehicle, relating to the technical field of motor stall protection; the problem that the subsequent driving safety is influenced due to the fact that the rotating shaft is greatly damaged when the motor is stalled and protected is solved; the electric vehicle motor stall protection device comprises a motor box, wherein the inner wall of one side of the motor box is connected with a driving motor through a bolt; the outer wall of one side of the output shaft of the driving motor is connected with a coupler through a bolt, and the protection method of the electric vehicle motor stall protection device comprises the following steps: and the electromagnetic slot is electrified, the displacement sensor is started, and the driving motor operates. According to the invention, the bearing connecting ring, the hollow base, the telescopic spring, the telescopic connecting rod, the fixed connecting plate, the arc-shaped speed reducing plate and the friction layer are arranged, and the friction layer performs friction speed reduction on the bearing connecting ring on the driving connecting shaft when the driving motor stalls, so that the friction layer on the arc-shaped speed reducing plate is prevented from directly contacting with the driving connecting shaft, and the influence of damage of the driving connecting shaft on subsequent running is avoided.
Description
Technical Field
The invention relates to the technical field of motor stall protection, in particular to a motor stall protection device and a motor stall protection method for an electric vehicle.
Background
Electric vehicles, namely electric drive vehicles, are also known as electric drive vehicles. The electric vehicle is divided into an alternating current electric vehicle and a direct current electric vehicle, the electric vehicle generally uses a battery as an energy source, components such as a controller and a motor convert electric energy into mechanical energy to move, the vehicle changes speed according to the magnitude of control current, in the daily driving process, the electric vehicle easily loses control, generally, motor stall is caused by motor stall, motor stall refers to motor stall, motor stall is the performance that motor speed loses control, at present, in the prior art, the motor stall protection of the electric vehicle generally adopts speed limitation on a rotating shaft, the surface of the rotating shaft is easily abraded, the strength of the rotating shaft is reduced, and subsequent driving safety is influenced, so that an electric vehicle motor stall protection device and a protection method thereof are urgently needed.
Through the retrieval, chinese patent application number is CN 202010274308.0's patent, discloses a stall protection device for electric motor car motor, including motor and shell, the outside swing joint of motor has the pivot, and the outside swing joint of pivot has the connecting block, and the outside swing joint of connecting block has spring one, and the outside swing joint of pivot has the commentaries on classics piece, and the inside fixedly connected with stopper of shell, the inside swing joint of shell have connecting rod one. The stall protection device of electric motor car motor in the above-mentioned patent adopts the countershaft to carry out the speed limit, wears out the countershaft surface easily, reduces the intensity of pivot, influences subsequent driving safety.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a motor stall protection device and a motor stall protection method for an electric vehicle.
In order to achieve the purpose, the invention adopts the following technical scheme:
a motor stall protection device of an electric vehicle comprises a motor box; the inner wall of one side of the motor box is connected with a driving motor through a bolt; the outer wall of one side of the output shaft of the driving motor is connected with a coupling through a bolt; the outer wall of one side of the coupler is connected with a driving connecting shaft through a bolt; a key groove is processed on the outer wall of one side of the driving connecting shaft; a fixed key is arranged on the inner wall of one side of the key groove; the outer wall of the periphery of the driving connecting shaft is fixedly connected with a bearing connecting ring; a key hole is processed on the inner wall of one side of the bearing connecting ring; the outer wall of one side of the motor box is fixedly connected with a motor protection plate through a screw; electromagnetic grooves are processed on the inner walls of the two sides of the motor protection plate; the inner wall of one side of the electromagnetic groove is fixedly connected with a hollow base through a screw; an expansion spring is fixedly connected with the inner wall of one side of the hollow base; the outer wall of one end of the telescopic spring is fixedly connected with a telescopic connecting rod; the peripheral outer wall of the telescopic connecting rod is connected with the inner wall of one side of the hollow base in a sliding manner; the outer wall of one side of the telescopic connecting rod is fixedly connected with a fixed connecting plate through a screw; the outer wall of one side of the fixed connecting plate is fixedly connected with an arc-shaped speed reducing plate through a screw; a friction layer is arranged on the outer wall of one side of the arc-shaped speed reducing plate; a control unit is arranged in the motor box; the electromagnetic groove is electrically connected with the internal control unit.
Preferably: the outer wall of one side of the bearing connecting ring is fixedly connected with a rotating shaft protecting cylinder through a screw; the driving connecting shaft is positioned inside the rotating shaft protecting cylinder.
Preferably: the peripheral outer wall of the rotating shaft protection cylinder is fixedly connected with a supporting disc; the outer wall of one side of the supporting disc is rotatably connected with rotary connecting rods which are uniformly distributed; the outer wall of one side of the rotating connecting rod is fixedly connected with an arc head.
Preferably: the peripheral outer wall of the rotating shaft protection cylinder is connected with a movable disc in a sliding manner; the inner wall of one side of the movable disc is provided with active connecting grooves which are uniformly distributed; the inner wall of one side of the active connecting groove is connected with an active sliding block in a sliding way; the outer wall of one side of the arc head is rotatably connected with the outer wall of one side of the driving sliding block.
Preferably: the peripheral outer wall of the rotating shaft protection cylinder is provided with uniformly distributed driven connecting grooves; the inner wall of one side of the driven connecting groove is connected with a driven sliding block in a sliding manner; a circumferential groove is processed on the inner wall of one side of the driving sliding block; a limiting spring is fixedly connected with the inner wall of one side of the circumferential groove; the outer wall of one side of the limiting spring is fixedly connected with the outer wall of one side of the driven sliding block.
Preferably: the outer wall of the other side of the movable disc is fixedly connected with movable connecting rods which are uniformly distributed through screws; the peripheral outer wall of the rotating shaft protection cylinder is fixedly connected with a fixed disc; the peripheral outer wall of the movable connecting rod is connected with the inner wall of one side of the fixed disc in a sliding manner.
Preferably: the outer wall of one side of the movable connecting rod is fixedly connected with displacement sensors which are uniformly distributed through screws; the displacement sensor is electrically connected with the internal control unit.
Preferably: the outer walls of the two sides of the motor protection plate are connected with a brake cylinder through bolts; the outer wall of one side of the output shaft of the brake cylinder is fixedly connected with an emergency brake rod through a screw; the brake cylinder is electrically connected with the internal control unit.
Preferably: the inner walls of the two sides of the motor protection plate are provided with uniformly distributed braking chutes; the inner wall of one side of the braking chute is connected with a braking slide block in a sliding way; the outer wall of one side of the brake sliding block is rotatably connected with a brake reinforcing bar; the outer wall of one side of the braking reinforcing bar is rotatably connected with the outer wall of one side of the emergency braking bar.
A protection method of an electric vehicle motor stall protection device specifically comprises the following steps:
s1: electrifying the electromagnetic groove, starting the displacement sensor and driving the motor to operate;
s2: comparing the distance of the moving connecting rod measured by the displacement sensor with the rotating speed of the manually controlled driving motor;
s3: if the comparison is normal, repeating S2, if the comparison result shows that the motor stalls, switching to S4, and if the comparison result shows that the motor stalls seriously, switching to S5;
s4: the electromagnetic slot stops electrifying;
s5: and the brake cylinder operates.
The invention has the beneficial effects that:
1. bear the weight of the interlinkage through the setting, the cavity base, expanding spring, telescopic connecting rod, fixed even board, arc speed reduction board and frictional layer, the frictional layer is to the epaxial chain of bearing of drive even when driving motor stall rubs the speed reduction, prevent that the frictional layer on the arc speed reduction board is direct and the even axle contact of drive, avoid the drive even epaxial impaired subsequent travel of influence, in the beginning, the electromagnetism groove circular telegram, expanding spring is in compression state, mention the arc speed reduction board, during driving motor stall, the electromagnetism groove stops the circular telegram, the elastic potential energy that expanding spring stored turns into kinetic energy, make the arc speed reduction board move down and link the speed reduction to the epaxial chain of bearing of drive even, reduce the wearing and tearing that the drive even axle received.
2. Through setting up pivot protection section of thick bamboo, rotating connecting rod, removal disc, initiative linking groove, circular arc head and initiative slider, when the electric motor car normally traveles, driving motor operation area drive link and bear the weight of the interlinkage and rotate, rotating connecting rod begins the slope under the effect of centrifugal force, rotating connecting rod is at the in-process initiative slider of slope and is removed along initiative linking groove, removes the disc and removes along pivot protection section of thick bamboo, and driven slider removes along driven linking groove simultaneously.
3. Through setting up driven even groove, driven slider, circumference groove and spacing spring, spacing spring and the driven slider in the inside circumference groove of initiative slider are connected, remain vertical relation between them throughout, guarantee that the initiative slider has the trend of downstream for the device can reset when driving motor stall, guarantees that the device has traceability, improves the device flexibility.
4. Through setting up displacement sensor, removal connecting rod and fixed disc, when removing the disc and removing, the removal connecting rod on the removal disc passes from fixed disc, detects the distance that removes the connecting rod and remove through displacement sensor, and whether the rotational speed of motor accords with control range through the distance inspection that removes the connecting rod, if do not accord with, trigger motor stall protection mechanism.
5. Through setting up brake cylinder, the braking spout, the braking adds the muscle pole, brake slider and urgent brake lever, detect driving motor stall when comparatively serious when displacement sensor, brake cylinder operation makes urgent brake lever remove, and finally make urgent brake lever remove between two rotating connecting rods, prevent rotating connecting rod's rotation, the rotation of the even axle of emergency braking drive promptly, brake slider through on the motor protection shield board, the braking adds muscle pole and braking spout and supports the consolidation to urgent brake lever, prevent that it from breaking when emergency braking, can't accomplish emergency braking's function.
Drawings
Fig. 1 is a schematic view of a subjective structure of a motor stall protection device for an electric vehicle according to the present invention;
fig. 2 is a schematic side view of a motor stall protection device for an electric vehicle according to the present invention;
FIG. 3 is a schematic view of a load-bearing interlink structure of a motor stall protection device for an electric vehicle according to the present invention;
FIG. 4 is a schematic cross-sectional view of a load-bearing link of the motor stall protection device of an electric vehicle according to the present invention;
FIG. 5 is a schematic cross-sectional view of a hollow base of a motor stall protection device for an electric vehicle according to the present invention;
FIG. 6 is a schematic structural view of a brake cylinder of the electric vehicle motor stall protection device according to the present invention;
fig. 7 is a schematic structural view of a driving rotating shaft of a motor stall protection device of an electric vehicle according to the present invention;
fig. 8 is a schematic circuit flow diagram of a motor stall protection device for an electric vehicle according to the present invention;
fig. 9 is a flowchart of a protection method for a motor stall protection device of an electric vehicle according to the present invention.
In the figure: 1 motor box, 2 motor protecting plates, 3 arc speed reducing plates, 4 braking cylinders, 5 moving disks, 6 fixing disks, 7 driving rotating shafts, 8 moving connecting rods, 9 supporting disks, 10 bearing connecting rings, 11 driving motors, 12 couplers, 13 rotating connecting rods, 14 displacement sensors, 15 rotating shaft protecting cylinders, 16 driven connecting grooves, 17 arc heads, 18 driving sliding blocks, 19 driving connecting grooves, 20 limiting springs, 21 circumferential grooves, 22 key holes, 23 driven sliding blocks, 24 hollow bases, 25 telescopic springs, 26 telescopic connecting rods, 27 fixing connecting plates, 28 friction layers, 29 electromagnetic grooves, 30 emergency braking rods, 31 braking sliding blocks, 32 braking reinforcing rods, 33 braking sliding grooves, 34 fixing keys and 35 key grooves.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
The first embodiment is as follows:
an electric vehicle motor stall protection device, as shown in fig. 1-8, comprises a motor case 1; the inner wall of one side of the motor box 1 is connected with a driving motor 11 through a bolt; the outer wall of one side of an output shaft of the driving motor 11 is connected with a coupling 12 through a bolt; the outer wall of one side of the coupler 12 is connected with a driving connecting shaft 7 through a bolt; a key groove 35 is processed on the outer wall of one side of the driving connecting shaft 7; a fixed key 34 is arranged on the inner wall of one side of the key groove 35; the outer wall of the periphery of the driving connecting shaft 7 is fixedly connected with a bearing connecting ring 10; a key hole 22 is processed on the inner wall of one side of the bearing connecting ring 10; the outer wall of one side of the motor box 1 is fixedly connected with a motor protection plate 2 through a screw; electromagnetic grooves 29 are processed on the inner walls of the two sides of the motor protection plate 2; the inner wall of one side of the electromagnetic groove 29 is fixedly connected with a hollow base 24 through a screw; an expansion spring 25 is fixedly connected with the inner wall of one side of the hollow base 24; the outer wall of one end of the telescopic spring 25 is fixedly connected with a telescopic connecting rod 26; the peripheral outer wall of the telescopic connecting rod 26 is connected with the inner wall of one side of the hollow base 24 in a sliding way; the outer wall of one side of the telescopic connecting rod 26 is fixedly connected with a fixed connecting plate 27 through a screw; the outer wall of one side of the fixed connecting plate 27 is fixedly connected with an arc-shaped speed reducing plate 3 through a screw; a friction layer 28 is arranged on the outer wall of one side of the arc-shaped speed reducing plate 3; a control unit is arranged in the motor box 1; the electromagnetic slot 29 is electrically connected with the internal control unit; the motor protection plate 2 and the electromagnetic groove 29 on the motor protection plate 2 are arranged on one side of the motor box 1, the hollow base 24, the expansion spring 25, the expansion connecting rod 26, the fixed connecting plate 27 and the friction layer 28 are used for performing friction speed reduction on the bearing connecting ring 10 on the driving connecting shaft 7 when the driving motor 11 stalls, the friction layer 28 on the arc-shaped speed reduction plate 3 is prevented from directly contacting with the driving connecting shaft 7, the driving connecting shaft 7 is prevented from being damaged and influencing subsequent running, initially, the electromagnetic groove 29 is electrified, the expansion spring 25 is in a compression state, the arc-shaped speed reduction plate 3 is lifted, when the driving motor 11 stalls, the electromagnetic groove 29 stops being electrified, the elastic energy stored by the expansion spring 25 is converted into kinetic energy, the arc-shaped speed reduction plate 3 moves downwards to decelerate the bearing connecting ring 10 on the driving connecting shaft 7, and abrasion on the driving connecting shaft 7.
In order to detect the stall of the driving motor 11 conveniently, as shown in fig. 1 to 8, a rotating shaft protection cylinder 15 is fixedly connected to the outer wall of one side of the bearing link 10 through a screw; the driving connecting shaft 7 is positioned inside the rotating shaft protection cylinder 15; the peripheral outer wall of the rotating shaft protection cylinder 15 is fixedly connected with a supporting disc 9; the outer wall of one side of the supporting disc 9 is rotatably connected with rotary connecting rods 13 which are uniformly distributed; the outer wall of one side of the rotating connecting rod 13 is fixedly connected with an arc head 17; the peripheral outer wall of the rotating shaft protection cylinder 15 is connected with a movable disc 5 in a sliding way; the inner wall of one side of the movable disc 5 is provided with evenly distributed active connecting grooves 19; the inner wall of one side of the active connecting groove 19 is connected with an active sliding block 18 in a sliding way; the outer wall of one side of the arc head 17 is rotationally connected with the outer wall of one side of the driving slide block 18; the peripheral outer wall of the rotating shaft protection cylinder 15 is provided with driven connecting grooves 16 which are uniformly distributed; a driven sliding block 23 is connected to the inner wall of one side of the driven connecting groove 16 in a sliding manner; a circumferential groove 21 is processed on the inner wall of one side of the driving slide block 18; the inner wall of one side of the circumferential groove 21 is fixedly connected with a limiting spring 20; the outer wall of one side of the limiting spring 20 is fixedly connected with the outer wall of one side of the driven sliding block 23; the outer wall of the other side of the movable disc 5 is fixedly connected with movable connecting rods 8 which are uniformly distributed through screws; the peripheral outer wall of the rotating shaft protection cylinder 15 is fixedly connected with a fixed disc 6; the peripheral outer wall of the movable connecting rod 8 is connected with the inner wall of one side of the fixed disc 6 in a sliding way; the outer wall of one side of the movable connecting rod 8 is fixedly connected with displacement sensors 14 which are uniformly distributed through screws; the displacement sensor 14 is electrically connected with the internal control unit; when the electric vehicle normally runs, the driving motor 11 drives the driving connecting shaft 7 and the bearing connecting ring 10 to rotate, the rotating connecting rod 13 begins to incline under the action of centrifugal force, the driving slide block 18 moves along the driving connecting groove 19 in the inclining process of the rotating connecting rod 13, the movable disc 5 moves along the rotating shaft protection barrel 15, the driven slide block 23 moves along the driven connecting groove 16, the limiting spring 20 in the circumferential groove 21 inside the driving slide block 18 is connected with the driven slide block 23, the vertical relation between the limiting spring and the driven slide block 23 is always kept, the driving slide block 18 is ensured to have the trend of moving downwards, the device can be reset when the driving motor 11 stops rotating, the movable connecting rod 8 on the movable disc 5 passes through the fixed disc 6 while the movable disc 5 moves, the moving distance of the movable connecting rod 8 is detected through the displacement sensor 14, and whether the rotating speed of the motor meets the control range is detected through the moving distance of the movable connecting, and if not, triggering a motor stall protection mechanism.
In order to trigger emergency braking when the stall of the driving motor 11 is serious, as shown in fig. 1-8, the outer walls of two sides of the motor protection plate 2 are connected with braking cylinders 4 through bolts; the outer wall of one side of the output shaft of the brake cylinder 4 is fixedly connected with an emergency brake rod 30 through a screw; the inner walls of the two sides of the motor protection plate 2 are provided with brake sliding grooves 33 which are uniformly distributed; the inner wall of one side of the brake chute 33 is connected with a brake slide block 31 in a sliding way; the outer wall of one side of the brake sliding block 31 is rotatably connected with a brake reinforcing bar 32; the outer wall of one side of the brake reinforcing bar 32 is rotationally connected with the outer wall of one side of the emergency brake bar 30; the brake cylinder 4 is electrically connected with the internal control unit; when the displacement sensor 14 detects that the stall of the driving motor 11 is serious, the brake cylinder 4 operates to move the emergency brake lever 30, and finally the emergency brake lever 30 moves between the two rotary connecting rods 13, so that the rotation of the rotary connecting rods 13 is prevented, namely the emergency brake drives the connecting shaft 7 to rotate, the emergency brake lever 30 is supported and consolidated through the brake slider 31, the brake reinforcing rod 32 and the brake sliding groove 33 on the motor protection plate 2, and the emergency brake lever is prevented from being broken during emergency braking and cannot complete the emergency braking function.
The working principle is as follows: when the electric vehicle is used, power supplies of various electric equipment are turned on, one side of the motor box 1 is provided with the motor protection plate 2, the electromagnetic groove 29 on the motor protection plate 2, the hollow base 24, the telescopic spring 25, the telescopic connecting rod 26, the fixed connecting plate 27 and the friction layer 28 to perform friction speed reduction on the bearing connecting ring 10 on the driving connecting shaft 7 when the driving motor 11 stalls, the friction layer 28 on the arc-shaped speed reducing plate 3 is prevented from directly contacting with the driving connecting shaft 7, the driving connecting shaft 7 is prevented from being damaged and influencing subsequent running, the electromagnetic groove 29 is electrified initially, the telescopic spring 25 is in a compressed state, the arc-shaped speed reducing plate 3 is lifted, when the driving motor 11 stalls, the electromagnetic groove 29 stops being electrified, elastic potential energy stored by the telescopic spring 25 is converted into kinetic energy, the arc-shaped speed reducing plate 3 moves downwards to decelerate the bearing connecting ring 10 on the driving connecting shaft 7, abrasion on the driving connecting shaft 7, the driving motor 11 runs to drive the connecting shaft 7 and the bearing connecting ring 10 to rotate, the rotating connecting rod 13 begins to incline under the action of centrifugal force, the driving slide block 18 moves along the driving connecting groove 19 in the inclining process of the rotating connecting rod 13, the movable disc 5 moves along the rotating shaft protection barrel 15, meanwhile, the driven slide block 23 moves along the driven connecting groove 16, the limiting spring 20 in the circumferential groove 21 in the driving slide block 18 is connected with the driven slide block 23, the vertical relation between the limiting spring and the driven slide block is always kept, the driving slide block 18 is ensured to have the trend of moving downwards, the device can be reset when the driving motor 11 stops rotating, the movable connecting rod 8 on the movable disc 5 passes through the fixed disc 6 while the movable disc 5 moves, the moving distance of the movable connecting rod 8 is detected through the displacement sensor 14, and whether the rotating speed of the motor meets the control range is detected through the moving distance of the movable connecting, if the motor stall is not met, a motor stall protection mechanism is triggered, when the displacement sensor 14 detects that the stall of the driving motor 11 is serious, the brake cylinder 4 operates to move the emergency brake rod 30, and finally the emergency brake rod 30 moves between the two rotary connecting rods 13, so that the rotation of the rotary connecting rods 13, namely the rotation of the emergency brake driving connecting shaft 7 is prevented, the emergency brake rod 30 is supported and consolidated through the brake slider 31, the brake reinforcing rod 32 and the brake sliding groove 33 on the motor protection plate 2, and the emergency brake rod is prevented from being broken during emergency braking, and the emergency brake function cannot be completed.
Example two:
a method for protecting a motor stall protection device of an electric vehicle, as shown in fig. 7, comprises the following steps:
s1: the electromagnetic slot 29 is electrified, the displacement sensor 14 is started, and the driving motor 11 runs;
s2: comparing the distance of the movement of the movable connecting rod 8 measured by the displacement sensor 14 with the rotating speed of the manually controlled driving motor 11;
s3: if the comparison is normal, repeating S2, if the comparison result shows that the motor stalls, switching to S4, and if the comparison result shows that the motor stalls seriously, switching to S5;
s4: the electromagnetic slot 29 stops energizing;
s5: the brake cylinder 4 is operated.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. An electric vehicle motor stall protection device comprises a motor box (1); the device is characterized in that the inner wall of one side of the motor box (1) is connected with a driving motor (11) through a bolt; the outer wall of one side of an output shaft of the driving motor (11) is connected with a coupling (12) through a bolt; the outer wall of one side of the coupler (12) is connected with a driving connecting shaft (7) through a bolt; a key groove (35) is processed on the outer wall of one side of the driving connecting shaft (7); a fixed key (34) is arranged on the inner wall of one side of the key groove (35); the outer wall of the periphery of the driving connecting shaft (7) is fixedly connected with a bearing connecting ring (10); a key hole (22) is processed on the inner wall of one side of the bearing connecting ring (10); the outer wall of one side of the motor box (1) is fixedly connected with a motor protection plate (2) through a screw; electromagnetic grooves (29) are processed on the inner walls of the two sides of the motor protection plate (2); the inner wall of one side of the electromagnetic groove (29) is fixedly connected with a hollow base (24) through a screw; an expansion spring (25) is fixedly connected with the inner wall of one side of the hollow base (24); the outer wall of one end of the telescopic spring (25) is fixedly connected with a telescopic connecting rod (26); the peripheral outer wall of the telescopic connecting rod (26) is connected with the inner wall of one side of the hollow base (24) in a sliding way; the outer wall of one side of the telescopic connecting rod (26) is fixedly connected with a fixed connecting plate (27) through a screw; the outer wall of one side of the fixed connecting plate (27) is fixedly connected with an arc-shaped speed reducing plate (3) through a screw; a friction layer (28) is arranged on the outer wall of one side of the arc-shaped speed reducing plate (3); a control unit is arranged in the motor box (1); the electromagnetic groove (29) is electrically connected with the internal control unit.
2. The electric vehicle motor stall protection device as claimed in claim 1, wherein a rotating shaft protection barrel (15) is fixedly connected to the outer wall of one side of the bearing connecting ring (10) through a screw; the driving connecting shaft (7) is positioned inside the rotating shaft protecting cylinder (15).
3. The electric vehicle motor stall protection device as claimed in claim 2, wherein the peripheral outer wall of the rotating shaft protection cylinder (15) is fixedly connected with a support disc (9); the outer wall of one side of the supporting disc (9) is rotationally connected with rotary connecting rods (13) which are uniformly distributed; the outer wall of one side of the rotating connecting rod (13) is fixedly connected with an arc head (17).
4. The electric vehicle motor stall protection device as claimed in claim 3, wherein the peripheral outer wall of the rotating shaft protection cylinder (15) is connected with a movable disc (5) in a sliding manner; the inner wall of one side of the movable disc (5) is provided with active connecting grooves (19) which are uniformly distributed; the inner wall of one side of the active connecting groove (19) is connected with an active sliding block (18) in a sliding way; the outer wall of one side of the arc head (17) is rotationally connected with the outer wall of one side of the driving sliding block (18).
5. The electric vehicle motor stall protection device according to claim 4, wherein the peripheral outer wall of the rotating shaft protection cylinder (15) is provided with uniformly distributed driven connecting grooves (16); a driven sliding block (23) is connected to the inner wall of one side of the driven connecting groove (16) in a sliding manner; a circumferential groove (21) is processed on the inner wall of one side of the driving slide block (18); a limiting spring (20) is fixedly connected to the inner wall of one side of the circumferential groove (21); the outer wall of one side of the limiting spring (20) is fixedly connected with the outer wall of one side of the driven sliding block (23).
6. The electric vehicle motor stall protection device as claimed in claim 5, wherein the other side outer wall of the moving disc (5) is fixedly connected with moving connecting rods (8) which are uniformly distributed through screws; the outer wall of the periphery of the rotating shaft protection cylinder (15) is fixedly connected with a fixed disc (6); the peripheral outer wall of the movable connecting rod (8) is connected with the inner wall of one side of the fixed disc (6) in a sliding way.
7. The electric vehicle motor stall protection device according to claim 6, characterized in that the outer wall of one side of the movable connecting rod (8) is fixedly connected with displacement sensors (14) which are uniformly distributed through screws; the displacement sensor (14) is electrically connected with the internal control unit.
8. The electric vehicle motor stall protection device as claimed in claim 7, wherein the outer walls of both sides of the motor protection plate (2) are connected with a brake cylinder (4) through bolts; an emergency brake rod (30) is fixedly connected to the outer wall of one side of the output shaft of the brake cylinder (4) through a screw; the brake cylinder (4) is electrically connected with the internal control unit.
9. The electric vehicle motor stall protection device as claimed in claim 8, wherein the inner walls of the two sides of the motor protection plate (2) are provided with uniformly distributed braking chutes (33); a braking slide block (31) is connected with the inner wall of one side of the braking chute (33) in a sliding way; the outer wall of one side of the brake sliding block (31) is rotatably connected with a brake reinforcing bar (32); the outer wall of one side of the brake reinforcing bar (32) is rotationally connected with the outer wall of one side of the emergency brake bar (30).
10. A method of protecting an electric vehicle motor stall protection device according to any one of claims 1 to 9, comprising the steps of:
s1: the electromagnetic groove (29) is electrified, the displacement sensor (14) is started, and the driving motor (11) operates;
s2: the distance of the movement of the movable connecting rod (8) measured by the displacement sensor (14) is compared with the rotating speed of the manually controlled driving motor (11);
s3: if the comparison is normal, repeating S2, if the comparison result shows that the motor stalls, switching to S4, and if the comparison result shows that the motor stalls seriously, switching to S5;
s4: the electromagnetic slot (29) stops electrifying;
s5: the brake cylinder (4) operates.
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| CN114123642A (en) * | 2021-11-08 | 2022-03-01 | 嘉兴学院 | Servo motor with speed reduction adjusting device |
| CN116040307A (en) * | 2023-01-10 | 2023-05-02 | 上海狄兹精密机械股份有限公司 | ZR module |
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| CN104868686A (en) * | 2015-05-25 | 2015-08-26 | 湖州鸿远电机有限公司 | Rapid direct-current brushless motor structure |
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| CN112910169B (en) | 2022-02-18 |
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Effective date of registration: 20220125 Address after: 213000 Yujia Village, Zou District Town, Zhonglou District, Changzhou City, Jiangsu Province Applicant after: CHANGZHOU CITY WUJIN JINSHUN ELECTROMECHANICAL Co.,Ltd. Address before: No.113 Minsheng Road, Lanhe Town, Nansha District, Guangzhou, Guangdong 511480 Applicant before: Liu Yan |
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