CN219115355U - Balance mechanism - Google Patents

Abstract

The utility model provides a balance mechanism, which comprises a rotating frame part and a rotating part which can rotate relatively, and also comprises a sliding part and an elastic mechanism, wherein the rotating part is fixedly connected with an eccentric part, the eccentric part is eccentrically arranged relative to an axis X, the sliding part props against the eccentric part, the tail part of the surface, which is in contact with a pressing plate of a sliding block of the sliding part and an eccentric pin of the eccentric part, props against the eccentric part is inclined downwards to form a first inclined plane, the front part of the surface is vertical to the moving direction of the sliding block to form a first plane, the first inclined plane forms an obtuse angle with the first plane, the first inclined plane contacts with the eccentric part when a display is closed, and the eccentric part contacts with the first plane when the display is opened. The matching part of the sliding block and the eccentric part of the balance mechanism is processed into an inclined plane, when the display is parallel to the vehicle roof, the eccentric pin overcomes the force of the sliding block to generate a component force on the inclined plane, so that the force required for overcoming the elastic force of the tension spring on the sliding block is increased, and the torsion force of the balance mechanism is maximum and can be used for counteracting the gravity of the display.

Description

Balance mechanism

Technical Field

The utility model relates to the technical field of vehicle-mounted displays, in particular to a balancing mechanism.

Background

In the prior art, a flat panel display is generally mounted on a ceiling in a vehicle, and a liquid crystal display (hereinafter referred to as a display panel) is mounted on a tilting device in order to reduce the space occupied in the vehicle. The turnover device is provided with a mounting frame fixed on the vehicle ceiling, and a pallet arranged on the back of the display panel, and the pallet of the turnover device is turned upwards to be folded at ordinary times, so that the display surface of the display panel is abutted against the ceiling in the vehicle. When in use, the pallet of the turnover device turns downwards to erect the display panel.

In a typical turning device, a rotating frame is provided on both left and right sides of one edge of a pallet. The two rotating frames are respectively pivoted with a transverse short shaft fixedly connected with the corresponding end of the mounting frame. A worm gear speed reducing motor (hereinafter referred to as a speed reducing motor) is fixed on the pallet, and its output shaft is connected with a right short shaft (commonly referred to as a right fixed shaft) on the right rotating frame through a coupling.

At ordinary times, the display panel and the pallet are attached to the vehicle ceiling and are in a horizontal state, the centers of gravity of the display panel and the pallet are far away from the left fixed shaft and the right fixed shaft on the mounting frame, and downward overturning moment generated by the gravity of the display panel and the pallet is needed to be resisted by locking moment of a worm gear in the gear motor, so that the display panel and the pallet are kept approximately horizontal. However, when the display panel and the pallet are subjected to a sudden acceleration shock during running of the vehicle, the shock is superimposed on the gravitational moment of the display panel and the pallet, and the gravitational moment exceeds the locking moment of the worm gear in the gear motor, which may cause damage to the worm gear.

The present utility model relates to a balance mechanism for turning display, which generally comprises a guide rod capable of sliding, a reset spring for resetting against a slide rod, and an eccentric pin for pressing against a guide rod pressing plate, and the specific structure can be seen in the patent with publication number CN209385579U, the utility model name is a display turning device, a gravity balance mechanism thereof and a display device, but the pressing plate and the surface against the eccentric pin are in the same plane, when the display is closed, the gravity moment of the display is maximum, when the display is opened, the gravity moment is minimum, the resistance generated by the balance mechanism is always directed in one direction, and the moment cannot be adjusted to a proper size according to the rotating position of the display only by the action of a tension spring. Therefore, how to solve the problem that the edge of the display can be pushed by using a force of 3.5kg, and the problem that the display cannot fall down due to the excessive deceleration strip when the display receives the roof is a technical problem to be solved.

Disclosure of Invention

In order to solve the above problems, an object of the present utility model is to provide a balancing mechanism, wherein a part of a surface of a pressing plate of a sliding block of the balancing mechanism, which is matched with an eccentric portion, is processed into an inclined surface, when the eccentric portion is matched with a first inclined surface, a component force is generated when the display is opened against the acting force of an elastic mechanism due to the existence of the inclined surface, so that the force required for overcoming the elastic force of a tension spring of the sliding block is increased, the display is further prevented from falling down due to shaking, and when the eccentric portion of the display is opened, the eccentric portion is completely used for overcoming the resistance generated by the balancing mechanism and can easily push the display due to the fact that the component force of the inclined surface is not generated.

The utility model is realized by the following steps: the utility model provides a balance mechanism, includes rotating frame part and the rotation part that can relative rotation, still includes sliding part and elastic mechanism, the rotation part rigid coupling has eccentric part, eccentric part is eccentric to axis X and sets up, the sliding part pushes up the eccentric part, the clamp plate of the slider of sliding part with the eccentric pin of eccentric part pushes up the surface afterbody of contact and inclines down to first inclined plane, the front portion is the first plane with the direction of motion of slider perpendicularly in the contact surface, first inclined plane with first plane forms the obtuse angle, first inclined plane with eccentric part contact when the display is closed, eccentric part with first plane contact when the display is opened.

In an embodiment of the present utility model, the pressing block is provided with an arc surface transition between the first inclined plane and the first plane.

In an embodiment of the utility model, the claw at the lower end of the sliding block is bent and extended backwards, one end of the tension spring of the elastic mechanism is connected to the spring seat of the rotating frame part, and the other end of the tension spring is connected to the claw, so that an acute angle is formed between the axis of the tension spring and the running track of the sliding block.

In one embodiment of the utility model, the eccentric pin is sleeved with a copper sleeve.

The utility model has the beneficial effects that: compared with the prior art, the utility model provides a balance mechanism which has at least the following technical effects: the matching position of the sliding block and the eccentric part of the balance mechanism is processed into an inclined plane, so that the torsion of the display can be increased. When the display is in the retracted position, i.e. when the display is parallel to the vehicle roof, the eccentric pin then generates a force component on the inclined plane against the force of the slide, which results in an increase in the force required to overcome the spring force of the tension spring on the slide. The torque force of the balancing mechanism is at a maximum at this point and this torque force acts to counteract the weight of the display. When the display is opened downwards, the copper bush of the eccentric part moves to the first plane when the sliding block moves for a small distance, the copper bush overcomes the defect that the elasticity of the tension spring on the sliding block is reduced, and at the moment, the torsion of the balance mechanism is reduced. Therefore, when the display is arranged on the roof, namely the torsion of the balance mechanism is maximum when the display is parallel to the roof, the torsion of the balance mechanism is reduced when the display is separated from the roof for a distance, the display can be well prevented from being turned down due to shaking of the vehicle, and the requirement that the display can be pushed by 3.5kg of force can be met. The arc surface transition is arranged between the first inclined surface and the first plane, so that the display can be turned smoothly, and the clamping at the corner between the first inclined surface and the first plane is avoided.

Drawings

Fig. 1 is a schematic structural view of a balancing mechanism according to the present utility model.

Fig. 2 is a schematic diagram of a slider structure of a balancing mechanism according to the present utility model.

Fig. 3 is a schematic view of a balance mechanism according to another aspect of the present utility model.

Fig. 4 is a schematic view of a balance mechanism of the present utility model mounted on a display.

Fig. 5 is a schematic diagram showing a sliding portion of a balance mechanism according to the present utility model, in which the sliding portion abuts against a first inclined surface and a first flat surface of an eccentric portion.

Reference numerals illustrate: the device comprises a 1-sliding block, a 2-guide block, a 3-copper sleeve, a 4-eccentric disc, a 5-motor, a 6-clutch, a 7-right rotating frame, an 8-mounting frame, a 9-right rotating frame, a 10-screen frame, an 11-first inclined plane, a 12-arc surface, a 13-first plane, a 14-tension spring, a 15-claw and a 16-eccentric pin.

Detailed Description

The utility model will be further described with reference to the drawings and specific examples.

Referring to fig. 1 to 5, a balancing mechanism includes a rotating frame portion and a rotating portion capable of rotating relatively, and further includes a sliding portion and an elastic mechanism, wherein the rotating portion is fixedly connected with an eccentric portion, the eccentric portion is eccentrically disposed relative to an axis X, the sliding portion abuts against the eccentric portion, a surface tail portion of a pressing plate of a sliding block 1 of the sliding portion, which abuts against an eccentric pin 16 of the eccentric portion, is inclined downward to form a first inclined plane 11, a first plane 13 is perpendicular to a movement direction of the sliding block 1 at a front portion of the contact surface, the first inclined plane 11 and the first plane 13 form an obtuse angle a, preferably an included angle a=120 ° -160 °, when the display is closed, the first inclined plane 11 contacts the eccentric portion, and when the display is opened, the eccentric portion contacts the first plane 13. When the eccentric part is matched with the first inclined plane 11, the existence of the inclined plane overcomes the acting force of the elastic mechanism, so that a component force is generated when the display is opened, the force required by overcoming the elastic force of the tension spring of the sliding block 1 is increased, the display can be effectively prevented from falling down due to shaking, and when the eccentric part of the display is opened, the eccentric part is completely used for overcoming the resistance generated by the balance mechanism, so that the display can be pushed more easily due to the fact that the component force of the inclined plane is not generated after the eccentric part of the display passes over the inclined plane.

Referring to fig. 1 to 2, in an embodiment of the present utility model, the pressing block is provided with an arc surface 12 between the first inclined surface 11 and the first plane 13. By arranging the arc surface 12 for transition, the display can be opened and closed more smoothly and quietly.

Referring to fig. 1 to 2, in an embodiment of the present utility model, a claw 15 at the lower end of the slider 1 is bent and extended backward, one end of a tension spring 14 of the elastic mechanism is connected to a spring seat of the rotating frame portion, and the other end of the tension spring is connected to the claw 15, so that an acute angle B, preferably an angle b=5° -15 °, is formed between the axis of the tension spring 14 and the running track of the slider 1. For eliminating abnormal sounds which may be generated when the copper sheathing is moved from the first inclined surface 11 to the first flat surface 13.

Referring to fig. 1 to 5, in an embodiment of the present utility model, the eccentric pin 16 is sleeved with a copper sleeve 3. Ensure smooth and quiet rotation of the eccentric part.

The utility model has the following working principle:

when the display is positioned on the roof, the gravity center of the display is farthest from the installation position, the gravity moment is largest, and when the display is to be opened, the motor 5 drives the clutch 6, and the downward overturning force of the right rotating frame 7, the installation frame 8 and the left rotating frame 9 is transmitted to the screen frame 10 to drive the display to overturn downwards. In the process, the display rotating frame 9 drives the eccentric disc of the eccentric part 4 of the balance mechanism and the copper bush 3 to rotate, and the elastic force of the tension spring on the sliding block is overcome to drive the sliding block 1 to move along the guide rail in the rotating process of the copper bush 3. When the display is positioned on the roof, the matching part of the sliding block 1 of the balance mechanism and the copper bush 3 of the eccentric disc 4 is a first inclined plane, and at the moment, the copper bush 3 overcomes the force component generated on the inclined plane by the resistance of the sliding block due to the tension spring, so that the force required by overcoming the elasticity of the tension spring connected with the sliding block 1 is increased. When the slide block 1 moves for a small distance under the guidance of the guide block 2 of the rotating frame, the eccentric disc 4 drives the copper sleeve 3 to move to the first plane, and the copper sleeve 3 has no component force action of the inclined plane and can be used for overcoming the elasticity of the tension spring on the slide block 1. The force change is just reversed when the display is turned upwards; therefore, when the display is positioned on the roof, the torsion force of the balance mechanism is also maximum, and the torsion force is just used for counteracting the gravity force, and the balance force distance, the clutch force distance and the gravity force distance are required to be smaller than the force distance generated by the fact that 3.5kg force acts on the display edge. When the display is turned down to a certain angle, the gravity distance and the balance force distance are required to be smaller than the force distance generated by the fact that 3.5kg of force acts on the display edge. When the display is turned up, the motor 5 drives the clutch 6 to move upwards, and drives the right rotating frame 7, the mounting frame 8, the left rotating frame 9, the eccentric disc 4, the eccentric pin 16, the copper bush 3 and the sliding block 1 to move. In the process of movement of the display, the gravity center is farther from the installation position, and the gravity distance is larger. At this time, the gravity distance and the balance force distance should satisfy the force distance generated by applying a force of less than 3.5kg to the display edge, and simultaneously satisfy the gravity distance and the balance force distance < clutch moment. When the display moves to the roof, the gravity center of the display is farthest from the installation position, the gravity distance is largest, at the moment, the eccentric pin and the copper bush of the balance mechanism move to the first inclined plane of the sliding block, and the balance force distance is largest. Therefore, when the display is positioned on the vehicle roof, the larger the balance force distance is, the smaller the balance force distance is when the display is positioned at a certain position of the vehicle roof, and the purpose can be achieved by processing an inclined plane on the copper sleeve matching surface of the slide block pressing plate on the eccentric pin.

The points to be described are: first, in the description of the present application, it should be noted that, unless otherwise specified and defined, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be mechanical or electrical, or may be a direct connection between two elements, and "upper," "lower," "left," "right," etc. are merely used to indicate relative positional relationships, which may be changed when the absolute position of the object being described is changed.

Secondly: in the drawings of the disclosed embodiments, only the structures related to the embodiments of the present disclosure are referred to, and other structures may refer to the general design, so that the same embodiment and different embodiments of the present disclosure may be combined with each other without conflict.

Finally, the above description is only a preferred embodiment of the present utility model, and the scope of the present utility model is not limited to the above examples, but all technical solutions belonging to the concept of the present utility model are within the scope of the present utility model.

It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (4)

1. The utility model provides a balance mechanism, includes rotating frame part and the rotation part that can relative rotation, still includes sliding part and elastic mechanism, the rotation part rigid coupling has eccentric part, eccentric part sets up eccentrically with respect to axis X, sliding part pushes against eccentric part, its characterized in that: the pressing plate of the sliding block of the sliding part is propped against the eccentric pin of the eccentric part to be contacted with the surface tail part of the eccentric pin to be inclined downwards to form a first inclined plane, the middle front part of the surface is perpendicular to the moving direction of the sliding block to form a first plane, the first inclined plane and the first plane form an obtuse angle, the first inclined plane is contacted with the eccentric part when the display is closed, and the eccentric part is contacted with the first plane when the display is opened.

2. A balancing mechanism according to claim 1, wherein: the pressing plate is provided with an arc surface transition between the first inclined surface and the first plane.

3. A balancing mechanism according to claim 1, wherein: the jack catch of slider lower extreme is buckled backward and is extended, elastic mechanism's extension spring one end is connected on the spring holder of swivel mount part, and the other end is connected at the jack catch for the axis of extension spring with the moving trajectory of slider forms acute angle contained angle.

4. A balancing mechanism according to claim 1, wherein: and the eccentric pin is sleeved with a copper sleeve.

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