CN210565732U - Electromagnetic braking assembly for turnover mechanism and display turnover mechanism comprising same - Google Patents

Abstract

The utility model discloses an electromagnetic braking subassembly for tilting mechanism and contain its display tilting mechanism, including the electromagnetism seat that can produce magnetic attraction, be connected with first flange tooth in the electromagnetism seat, one side of first flange tooth is equipped with the second flange tooth that sets up relatively with first flange tooth, second flange tooth can rotate first flange tooth relatively, and second flange tooth is connected with an output shaft, first flange face and second flange face have respectively on first flange tooth and the second flange tooth, be equipped with the arch on one of them flange face of first flange face or second flange face, and be equipped with the recess of stepping down that can supply this protruding embedding on the other flange face, this arch can push up on another flange face and with this recess of stepping down form the state of staggering or correspond this recess of stepping down and embedding formation counterpoint state. The utility model discloses a protruding can prevent that two flange teeth are close to each other and form the meshing in order to prevent that the output shaft from being locked for no matter whether the electromagnetism seat is switched on under the state of staggering the output shaft homoenergetic by the rotation.

Description

Electromagnetic braking assembly for turnover mechanism and display turnover mechanism comprising same

Technical Field

The utility model relates to an on-vehicle display screen technical field, concretely relates to electromagnetic braking subassembly for tilting mechanism and display screen tilting mechanism who contains it.

Background

Chinese document CN204646978U (application date: 2015, 04, 29) discloses a manual turnover mechanism of a display, relating to the display. The electromagnetic brake device is provided with a friction component, an electromagnetic brake component and a fixed frame; the friction assembly is provided with a flange shaft, a base, a lower friction plate, an upper friction plate and an upper cover; the lower friction plate is arranged on the base, the flange shaft and the upper friction plate are sequentially placed in the lower friction plate, the upper cover covers the upper friction plate, through holes are formed in the base and the upper cover, the base and the upper cover are fastened by screws, and the tightness of the screws is adjusted according to required torque force; the electromagnetic braking component is provided with a magnet yoke cover, a coil, a magnet yoke, a pressure spring, flange teeth, a front bearing, a bearing seat, a rear bearing and a flange shaft; the front bearing and the rear bearing are sleeved into the bearing seat, the flange shaft penetrates through the rear bearing and the front bearing, and then the flange teeth are sleeved into the flange shaft; the coil is arranged in the magnet yoke, the magnet yoke cover is covered on the magnet yoke, the pressure spring is placed in a hole formed in the magnet yoke, the rotation stopping hole formed in the flange tooth is aligned to the rotation stopping pin arranged on the magnet yoke and pushed into the magnet yoke, and the magnet yoke is tightly locked on the bearing seat. When the device is opened: the switch is pressed, the coil is powered on, the flange teeth move back to the direction of the flange teeth under the action of magnetic force until being disengaged from the flange teeth and meshed with the flange teeth, the pressure spring is compressed, the flange teeth lose the restraint of the flange teeth at the moment, the displayer falls down due to self weight, the displayer is pulled off with hands, the displayer naturally falls to a required position after the friction force is overcome, the switch is loosened, the coil is powered off, the flange teeth lose the magnetic force, and under the action of the pressure spring, the flange teeth move towards the direction of the flange teeth until being meshed with the flange teeth. When closing: the switch is pressed, the coil is powered on, the flange teeth move towards the direction back to the flange teeth under the action of magnetic force until the flange teeth are disengaged and meshed with the flange teeth, the pressure spring is compressed, the flange teeth lose the restraint of the flange teeth, the display is closed by hands, the display naturally rotates to the roof after the friction force is overcome, at the moment, the switch is loosened, the coil loses power, the flange teeth lose the magnetic force, and the flange teeth move towards the direction of the flange teeth until the flange teeth are meshed with the flange teeth under the action of the pressure spring. However, the european union regulations require that the vehicle-mounted electric flip display can freely rotate along with the external force when the external force 35N is applied, but after the technical scheme is adopted, when the coil loses power, the two flange teeth are meshed under the action of the pressure spring, so that the flange shaft is locked and cannot rotate, and the display screen cannot be rotated even if the thrust exceeding 35N is applied to the display screen, so that the european union regulations are not met.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides an electromagnetic braking subassembly and contain its display screen tilting mechanism for tilting mechanism, it mainly solves be prior art, and during the coil outage, two flange teeth will keep meshing under the effect of pressure spring and lead to the display screen to be died by the lock, can't make the display screen rotate scheduling technical problem through applying certain external force.

In order to achieve the purpose, the utility model is realized by the following technical proposal:

an electromagnetic brake assembly for a turnover mechanism comprises an electromagnetic base capable of generating magnetic attraction, wherein a first flange tooth which only can move left and right relative to the electromagnetic base in the axial direction is connected in the electromagnetic base, an elastic piece with the elastic force direction opposite to the magnetic attraction direction generated by the electromagnetic base is arranged between the electromagnetic base and the first flange tooth, one side of the first flange tooth is provided with a second flange tooth which is arranged opposite to the first flange tooth, the second flange tooth can rotate relative to the first flange tooth, the second flange tooth is connected with an output shaft, the first flange tooth and the second flange tooth are respectively provided with a first flange surface and a second flange surface, one flange surface of the first flange surface or the second flange surface is provided with a bulge, the other flange surface is provided with a yielding groove which can be embedded with the bulge, the bulge can be abutted against the other flange surface and is staggered with the yielding groove or is embedded with the yielding groove to form an alignment state, when this arch and this groove of stepping down formed the counterpoint state, two flange teeth can be close to each other and form the meshing with the locking output shaft and prevent to rotate, and when this arch and this groove of stepping down formed the stagger state, can prevent through this arch that two flange teeth are close to each other and form the meshing with preventing that the output shaft is died by the lock for no matter whether the electromagnetism seat is switched on under the stagger state the output shaft homoenergetic is rotated.

Furthermore, the electromagnetic brake assembly for the turnover mechanism further comprises a first bearing seat, the first bearing seat and the electromagnetic seat are oppositely arranged left and right, an output shaft is rotatably connected in the first bearing seat, second flange teeth which are oppositely arranged with the first flange teeth are connected to the output shaft, and the second flange teeth can rotate along with the output shaft relative to the first flange teeth.

Furthermore, be equipped with the arch on the first flange face, be equipped with on the second flange face and can let the position recess with protruding matched with.

furthermore, the yielding groove has a certain yielding length, and when the electromagnetic seat is electrified to enable the first flange tooth and the second flange tooth to be disengaged and rotate within 0- α degrees relative to the second flange tooth, the protrusion can always correspond to the yielding groove so as to form an alignment state.

further, the range of the angle value of α is 5 ° to 15 °.

The utility model also provides a display tilting mechanism, including motor, clutch and foretell electromagnetic braking subassembly, the primary shaft bearing and the electromagnetism seat of motor and electromagnetic braking subassembly are all fixed on the screen body one end, and the one end of output shaft and roof mounting bracket one side rigid connection, and the output shaft other end passes primary shaft bearing and electromagnetism seat in proper order and is connected with the drive end of motor through the clutch, and the other end of the screen body rotates with roof mounting bracket opposite side to be connected.

Furthermore, an accommodating cavity is formed in the electromagnetic seat, the clutch is arranged in the accommodating cavity and provided with a first connecting end and a second connecting end, one end of the output shaft is rigidly connected with one side of the roof mounting frame, the other end of the output shaft sequentially penetrates through the first bearing seat and the electromagnetic seat and is connected with the second connecting end of the clutch, and the first connecting end of the clutch is connected with the driving end of the motor.

Furthermore, one end of the screen body, which is far away from the electromagnetic braking assembly, is fixedly connected with a second bearing seat, a connecting shaft is rotatably connected in the second bearing seat, and the outer end of the connecting shaft is rigidly connected with one side of the roof mounting frame.

Further, the motor is a speed reducing motor, and the clutch is a friction clutch.

The utility model also provides a display tilting mechanism, including motor, clutch, connecting axle and foretell electromagnetic braking subassembly, motor and the one end fixed connection of the screen body, and the drive end of motor is connected with the connecting axle through the clutch, connecting axle and roof mounting bracket one side rigid connection, electromagnetic braking subassembly and the other end fixed connection of the screen body, and output shaft and roof mounting bracket opposite side rigid connection.

Furthermore, the clutch is provided with a first connecting end and a second connecting end, one end, far away from the electromagnetic braking assembly, of the screen body is fixedly connected with a second bearing seat, the connecting shaft is rotatably connected into the second bearing seat, the driving end of the motor is connected with the first connecting end of the clutch, the second connecting end of the clutch is connected with one end of the connecting shaft, and the other end of the connecting shaft is rigidly connected with one side of the roof mounting frame.

A tilting mechanism uses electromagnetic braking subassembly and contains its display screen tilting mechanism, have following advantage:

1. when the electromagnetic seat is electrified, the electromagnetic seat can generate magnetic attraction to enable the first flange tooth to move towards the direction far away from the second flange tooth so as to enable the first flange tooth and the second flange tooth to be disengaged, the bulge between the first flange face and the second flange face is enabled to withdraw from the abdicating groove, then, under the action of external force, the output shaft can drive the second flange tooth to synchronously rotate and enable the bulge and the abdicating groove to form a staggered state, at the moment, the two flange teeth can be prevented from approaching each other to form meshing through the bulge to prevent the output shaft from being locked, so that the output shaft can be rotated under the action of external force, and in the process that the output shaft drives the second flange tooth to rotate, as long as the bulge does not correspond to the abdicating groove and is embedded to form an alignment state, but is in the staggered state, due to the isolation effect of the bulge, the first flange tooth and the second flange tooth can not approach each other to form meshing, the output shaft can rotate freely under the action of external force.

2. when the rotation angle of the screen body is larger than α degrees, the electromagnetic seat can be powered off, at the moment, the bulge on the first flange surface and the abdicating groove on the second flange surface are staggered to form a staggered state, the bulge can be abutted against the second flange surface to form an isolation effect on the first flange tooth and the second flange tooth, so that the first flange tooth and the second flange tooth cannot approach each other to form meshing, then the motor continues to act to drive the screen body to rotate to a preset angle to form a screen body opening state, then the power of the motor can be cut off, compared with the prior art, the defect that the electromagnetic seat needs to be powered on when a display screen is turned over, the technical scheme of the power consumption can solve the defect that the electromagnetic seat ring can be powered on until the screen body rotates to a preset angle to form a screen body opening state, and then the motor can be powered off when the first flange tooth and the second flange tooth are pushed to form a first connection end, and the power of the screen can be pushed to slip for a long time.

Drawings

Fig. 1 is an assembly schematic diagram of a display screen turnover mechanism and a screen body according to a first embodiment of the present invention.

Fig. 2 is an exploded schematic view of a part of a display screen turnover mechanism according to a first embodiment of the present invention.

Fig. 3 is a schematic view of a display screen turnover mechanism according to a first embodiment of the present invention.

Fig. 4 is another exploded schematic view of a part of the structure of the first embodiment of the present invention.

Fig. 5 is a schematic structural view of a first flange tooth according to a first embodiment of the present invention.

Fig. 6 is a schematic structural view of a second flange tooth according to a first embodiment of the present invention.

Fig. 7 is a structural sectional view of the first flange tooth and the second flange tooth engaged with each other according to the first embodiment of the present invention.

Fig. 8 is a sectional view B-B in fig. 7.

Fig. 9 is a schematic perspective view of a clutch according to a first embodiment of the present invention.

Fig. 10 is a schematic perspective view of another angle of the clutch according to the first embodiment of the present invention.

Fig. 11 is an assembly schematic diagram of the display screen turnover mechanism and the screen body according to the second embodiment of the present invention.

Fig. 12 is an exploded perspective view of an electromagnetic brake assembly according to a second embodiment of the present invention.

Description of reference numerals:

1. the clutch comprises a first bearing seat, a second bearing seat, a first flange tooth, a second flange tooth, a motor, a clutch, a second bearing seat, a second flange tooth, a first flange face, a second flange face, a connecting shaft, a first connecting end, a second connecting end, a protrusion 511, a yielding groove, a screen body and a second connecting end, wherein the first bearing seat is 2, the electromagnetic seat is 3, the first flange tooth is 4, the output shaft is 5, the second flange tooth is 6, the motor is.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Example one

Referring to fig. 1 to 8, in this embodiment, an electromagnetic brake assembly for a turnover mechanism includes an electromagnetic base 2 capable of generating a magnetic attraction force, a first flange tooth 3 connected to the electromagnetic base 2 and capable of moving only in a left-right direction with respect to an axial direction of the electromagnetic base 2, an elastic member having an elastic force in a direction opposite to the magnetic attraction force generated by the electromagnetic base 2 and disposed between the electromagnetic base 2 and the first flange tooth 3, a second flange tooth 5 disposed on one side of the first flange tooth 3 and opposite to the first flange tooth 3, the second flange tooth 5 capable of rotating with respect to the first flange tooth 3, the second flange tooth 5 connected to an output shaft 4, the first flange tooth 3 and the second flange tooth 5 respectively having a first flange surface 31 and a second flange surface 51, one of the first flange surface 31 or the second flange surface 51 having a protrusion thereon, and the other flange surface having a recess for the protrusion to be inserted therein, this arch can push up on another flange face and with should stepping down the recess and form stagger state or should step down the recess and the embedding formation counterpoint state of correspondence, when this arch and should stepping down the recess and form counterpoint state, two flange teeth can be close to each other and form the meshing with locking output shaft 4 and prevent rotating, and when this arch and should stepping down the recess and form stagger state, can prevent through this arch that two flange teeth are close to each other and form the meshing and prevent output shaft 4 from being locked, make no matter whether the output shaft 4 homoenergetic that switches on of electromagnetism seat 2 can be rotated under the stagger state.

In this embodiment, when the electromagnetic base 2 is powered on, the electromagnetic base 2 can generate magnetic attraction to move the first flange teeth 3 in a direction away from the second flange teeth 5, so as to disengage the first flange teeth 3 from the second flange teeth 5, so as to enable the protrusions between the first flange surface 31 and the second flange surface 51 to exit from the abdicating grooves, and then, under the action of external force, the output shaft 4 can drive the second flange teeth 5 to rotate synchronously and enable the protrusions and the abdicating grooves to form a staggered state, at this time, no matter whether the electromagnetic base 2 is powered on, the protrusions can prevent the two flange teeth from approaching each other to form a mesh to prevent the output shaft 4 from being locked, so that the output shaft 4 can be rotated under the action of external force, and when the output shaft drives the second flange teeth 5 to rotate, as long as the protrusions do not correspond to the abdicating grooves and are embedded to form an alignment state, but are in the staggered state, due to the isolation of the protrusions, the first flange teeth 3 and the second flange teeth 5 cannot approach each other to form engagement, and the output shaft 4 can rotate freely under the external force. After the electromagnetic brake assembly of the embodiment is installed on the screen body A, the screen body A can be rotated when a certain external force is applied to the screen body A, so that the requirement of European Union regulations is met. In addition, the electromagnetic brake assembly in this embodiment is an improvement on the structure of the electromagnetic brake assembly disclosed in CN204646978U, so the remaining parts of the electromagnetic brake assembly that are not described above are the same as the structure of the electromagnetic brake assembly that has been disclosed above, and the specific structure thereof is not described herein again, and can be designed by referring to the prior art.

Referring to fig. 5 to 8, in the embodiment, the electromagnetic braking assembly for the turnover mechanism further includes a first bearing seat 1, the first bearing seat 1 and the electromagnetic seat 2 are arranged opposite to each other in a left-right direction, an output shaft 4 is rotatably connected to the first bearing seat 1, second flange teeth 5 arranged opposite to the first flange teeth 3 are connected to the output shaft 4, and the second flange teeth 5 can rotate along with the output shaft 4 relative to the first flange teeth 3. In the present embodiment, the second flange teeth 5 are preferably arranged coaxially opposite to the first flange teeth 3.

referring to fig. 5 to 8, in the present embodiment, the first flange surface 31 is provided with a protrusion 311, and the second flange surface 51 is provided with a relief groove 511 capable of cooperating with the protrusion 311, however, it should be understood by those skilled in the art that the positions of the protrusion 311 and the relief groove 511 can be interchanged, that is, the protrusion is provided on the second flange surface, and the relief groove 511 capable of cooperating with the protrusion is provided on the first flange surface.

Referring to fig. 1 to 10, in the present embodiment, a display turnover mechanism includes a motor 6, a clutch 7, and the electromagnetic brake assembly, where the motor 6 and a first bearing seat 1 and an electromagnetic seat 2 of the electromagnetic brake assembly are both fixed on one end of a screen body a, one end of an output shaft 4 is rigidly connected to one side of a roof mounting bracket, the other end of the output shaft 4 sequentially passes through the first bearing seat 1 and the electromagnetic seat 2 and is connected to a driving end of the motor 6 through the clutch 7, and the other end of the screen body a is rotatably connected to the other side of the roof mounting bracket.

Referring to fig. 1 to 10, in the present embodiment, preferably, an accommodating cavity 21 is formed on the electromagnetic base 2, the clutch 7 is disposed in the accommodating cavity 21, the clutch 7 has a first connecting end 71 and a second connecting end 72, when a torque difference applied to the first connecting end 71 and the second connecting end 72 is greater than a maximum rated torque, the first connecting end 71 and the second connecting end 72 slip, one end of the output shaft 4 is rigidly connected to one side of the roof mount, the other end of the output shaft 4 sequentially passes through the first bearing block 1 and the electromagnetic base 2 and is connected to the second connecting end 72 of the clutch 7, and the first connecting end 71 of the clutch 7 is connected to the driving end of the motor 6. Preferably, one end of the screen body a far away from the electromagnetic brake assembly is fixedly connected with a second bearing seat 8, a connecting shaft 9 is rotatably connected in the second bearing seat 8, and the outer end of the connecting shaft 9 is rigidly connected with one side of the roof mounting frame.

Referring to fig. 1 to 4, 9 and 10, in the present embodiment, the motor 6 is preferably a reduction motor, and the clutch 7 is a friction clutch, preferably a multi-plate friction clutch. In the embodiment, the maximum torque of the clutch 7 is 35N, and when the torque difference applied to the first connection end 71 and the second connection end 72 is greater than 35N, the first connection end 71 and the second connection end 72 will slip, however, it should be understood by those skilled in the art that the maximum torque of the clutch 7 is not limited to 35N and can be adjusted accordingly according to the regulations. Further, the clutch 7 in the present embodiment is not limited to the multi-plate friction clutch disclosed above, and may be designed by referring to or selecting a friction pack in the related art CN204646978U or a coupling in CN 201115170Y.

when a screen body A of a display screen needs to be opened, firstly, an electromagnetic seat 2 of an electromagnetic brake assembly is electrified, so that a first flange tooth 3 and a second flange tooth 5 are disengaged, an output shaft 4 is unlocked and can rotate freely, then, a motor 6 is electrified, a driving end of the motor drives the output shaft 4 to rotate through a clutch 7, but the output shaft 4 cannot rotate due to rigid connection between the output shaft 4 and a roof mounting rack, the motor 6 can drive the screen body A to rotate under the action of a reaction force, when a rotation angle of the screen body A is larger than α degrees (in the embodiment, α is 10 degrees), the electromagnetic seat 2 can be powered off, at the moment, a protrusion 311 on a first flange surface 31 and a abdicating groove 511 on a second flange surface 51 are staggered to form a staggered state, the protrusion 311 can be abutted against the second flange surface 51 to form an isolation effect on the first flange tooth 3 and the second flange tooth 5, so that the first flange tooth 3 and the second flange tooth 5 cannot approach to form a meshing state, and then the screen body A can be opened to further meet the requirement of a power consumption requirement of a high-off-electricity when the screen seat is pushed to form a high-slip connection end of the electromagnetic screen seat, and the screen can be pushed to meet the requirement of the existing screen seat when the screen body A, and the power-on the screen seat, the screen can be pushed to meet the power-off technology, and the power-on display screen body A, and the screen can be pushed to meet the power-off technology, and the power-off technology, and.

Example two

The present embodiment is different from the first embodiment only in that: in the first embodiment, the motor 6 and the electromagnetic braking component are integrally arranged on the screen body a, while in the second embodiment, the motor 6 and the electromagnetic braking component are separately arranged on the screen body a. Referring to fig. 11 and 12, in the present embodiment, a display turnover mechanism includes a motor 6, a clutch 7, a connecting shaft 9 and the electromagnetic braking assembly, the motor 6 is fixedly connected to one end of a screen a, a driving end of the motor 6 is connected to the connecting shaft 9 through the clutch 7, the connecting shaft 9 is rigidly connected to one side of a roof mounting bracket, the electromagnetic braking assembly is fixedly connected to the other end of the screen a, and an output shaft 4 is rigidly connected to the other side of the roof mounting bracket.

Referring to fig. 9 to 12, in the present embodiment, the clutch 7 has a first connection end 71 and a second connection end 72, a second bearing seat 8 is fixedly connected to an end of the screen body a away from the electromagnetic brake assembly, the connection shaft 9 is rotatably connected to the second bearing seat 8, the driving end of the motor 6 is connected to the first connection end 71 of the clutch 7, the second connection end 72 of the clutch 7 is connected to one end of the connection shaft 9, and the other end of the connection shaft 9 is rigidly connected to one side of the roof mounting bracket.

when a screen body A of a display screen needs to be opened, firstly, an electromagnetic seat 2 of an electromagnetic brake assembly is electrified, so that a first flange tooth 3 and a second flange tooth 5 are disengaged, an output shaft 4 is unlocked and can rotate freely, then, a motor 6 is electrified, a driving end of the motor drives a connecting shaft 9 to rotate through a clutch 7, but the connecting shaft 9 cannot rotate due to rigid connection between the connecting shaft 9 and a roof mounting rack, the motor 6 can drive the screen body A to rotate under the action of a reaction force, when a rotation angle of the screen body A is larger than α degrees (in the embodiment, α is 10 degrees), the electromagnetic seat 2 can be powered off, at the moment, a protrusion 311 on a first flange surface 31 and a abdicating groove 511 on a second flange surface 51 are staggered to form a staggered state, the protrusion 311 can be abutted against the second flange surface 51 to form an isolation effect on the first flange tooth 3 and the second flange tooth 5, so that the first flange tooth 3 and the second flange tooth 5 cannot approach to form a meshing state, and then the screen body A can be opened to further meet the requirement of a power consumption requirement of a high-off power display screen when the screen seat A is pushed to be opened, and the screen seat is in the conventional power-off technology, and the screen can be pushed to meet the requirement when the power-on the screen body A, the screen is pushed to be opened, and the power-on the screen body A, and the screen body A, the screen seat, and the screen can be pushed to be in the screen body A, the screen can be in the power-off state, and the power.

The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; these modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention, and therefore, all other embodiments obtained by those skilled in the art without any creative effort fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides an electromagnetic braking subassembly for tilting mechanism, including electromagnetism seat (2) that can produce magnetic attraction, be connected with first flange tooth (3) of only relative electromagnetism seat (2) axial side-to-side motion in electromagnetism seat (2), and be equipped with the elastic component that elasticity direction and electromagnetism seat (2) produced magnetic attraction opposite direction between electromagnetism seat (2) and first flange tooth (3), one side of first flange tooth (3) is equipped with second flange tooth (5) that set up relatively with first flange tooth (3), second flange tooth (5) can rotate first flange tooth (3) relatively, and second flange tooth (5) are connected with an output shaft (4), its characterized in that: the first flange teeth (3) and the second flange teeth (5) are respectively provided with a first flange surface (31) and a second flange surface (51), one flange surface of the first flange surface (31) or the second flange surface (51) is provided with a bulge, the other flange surface is provided with a yielding groove for the bulge to be embedded, the protrusion can be pressed against the other flange surface to form a staggered state with the receding groove or a corresponding receding groove and embedded to form an alignment state, when the protrusion and the abdication groove form a contraposition state, the two flange teeth can approach each other to form meshing so as to lock the output shaft (4) to prevent rotation, when the bulge and the abdicating groove form a staggered state, the bulge can prevent the two flange teeth from approaching each other to form meshing so as to prevent the output shaft (4) from being locked, so that the output shaft (4) can be rotated in the staggered state regardless of whether the electromagnetic base (2) is energized or not.

2. The electromagnetic brake assembly for a turnover mechanism of claim 1, wherein: the electromagnetic brake assembly for the turnover mechanism further comprises a first bearing seat (1), the first bearing seat (1) and the electromagnetic seat (2) are oppositely arranged left and right, an output shaft (4) is connected in the first bearing seat (1) in a rotating mode, second flange teeth (5) which are oppositely arranged with the first flange teeth (3) are connected to the output shaft (4), and the second flange teeth (5) can rotate along with the output shaft (4) relative to the first flange teeth (3).

3. The electromagnetic brake assembly for a turnover mechanism of claim 2, wherein: be equipped with arch (311) on first flange face (31), be equipped with on second flange face (51) and can give way recess (511) with arch (311) matched with.

4. the electromagnetic brake assembly for the turnover mechanism of claim 3, wherein the abdicating groove (511) has an abdicating length, when the electromagnetic seat (2) is energized to disengage the first flange tooth (3) from the second flange tooth (5) and rotate within 0-alpha degrees relative to the second flange tooth (5), the protrusion (311) can always correspond to the abdicating groove (511) to form an alignment state.

5. the electromagnetic brake assembly for the turnover mechanism as recited in claim 4, wherein the range of the angle α is 5 ° to 15 °.

6. A display turnover mechanism is characterized in that: the electromagnetic brake assembly comprises a motor (6), a clutch (7) and the electromagnetic brake assembly as claimed in any one of claims 1 to 5, wherein a first bearing seat (1) and an electromagnetic seat (2) of the motor (6) and the electromagnetic brake assembly are fixed on one end of a screen body (A), one end of an output shaft (4) is rigidly connected with one side of a roof mounting rack, the other end of the output shaft (4) sequentially penetrates through the first bearing seat (1) and the electromagnetic seat (2) and is connected with a driving end of the motor (6) through the clutch (7), and the other end of the screen body (A) is rotatably connected with the other side of the roof mounting rack.

7. The display tilting mechanism of claim 6, characterized in that: the automobile roof mounting structure is characterized in that an accommodating cavity (21) is formed in the electromagnetic seat (2), the clutch (7) is arranged in the accommodating cavity (21), the clutch (7) is provided with a first connecting end (71) and a second connecting end (72), one end of the output shaft (4) is rigidly connected with one side of the roof mounting frame, the other end of the output shaft (4) sequentially penetrates through the first bearing seat (1) and the electromagnetic seat (2) and is connected with the second connecting end (72) of the clutch (7), and the first connecting end (71) of the clutch (7) is connected with the driving end of the motor (6).

8. The display tilting mechanism of claim 6, characterized in that: one end of the screen body (A) far away from the electromagnetic braking assembly is fixedly connected with a second bearing seat (8), a connecting shaft (9) is rotatably connected in the second bearing seat (8), and the outer end of the connecting shaft (9) is rigidly connected with one side of the roof mounting frame.

9. A display turnover mechanism is characterized in that: including motor (6), clutch (7), connecting axle (9) and any one of claims 1 to 5 the electromagnetic braking subassembly, motor (6) and screen body (A) one end fixed connection, and the drive end of motor (6) is connected with connecting axle (9) through clutch (7), connecting axle (9) and roof mounting bracket one side rigid connection, the electromagnetic braking subassembly and the other end fixed connection of screen body (A), and output shaft (4) and roof mounting bracket opposite side rigid connection.

10. The display tilting mechanism of claim 9, characterized in that: the clutch (7) is provided with a first connecting end (71) and a second connecting end (72), one end, far away from the electromagnetic brake assembly, of the screen body (A) is fixedly connected with a second bearing seat (8), the connecting shaft (9) is rotatably connected into the second bearing seat (8), the driving end of the motor (6) is connected with the first connecting end (71) of the clutch (7), the second connecting end (72) of the clutch (7) is connected with one end of the connecting shaft (9), and the other end of the connecting shaft (9) is rigidly connected with one side of the roof mounting frame.

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