CN110712499A - Magnetic speed reduction structure and sunshade curtain - Google Patents

Abstract

The invention discloses a magnetic deceleration structure relating to the technical field of sunshade curtains for vehicles, which solves the problem that the rotational speed of the rotating shaft of the sunshade curtain is difficult to control. Its technical points are: including a fixed casing, a rotating shaft connecting piece, a magnetic piece and a reduction sleeve, the magnetic piece and the fixed casing are clamped in the circumferential direction of the rotating shaft connecting piece, and the outer surface of the reducing sleeve is as a whole with the rotation center of the rotating shaft connecting piece. It is cylindrical with the shaft center, the reduction sleeve is circumferentially clamped with the connecting piece of the rotating shaft, the reducing sleeve is provided with a accommodating cavity, and the accommodating cavity is provided with a magnetic conducting member, and the accommodating cavity is arranged horizontally along the direction of the rotating shaft center of the rotating shaft connecting piece. The cross-sections are all circular with the axis of the reduction sleeve as the center, and the magnetic parts are located on one side of the reduction sleeve in the radial direction. Also disclosed is a sunshade, comprising a sunshade body and the above-mentioned magnetic deceleration structure. The structure is simple, stable and reliable, and while maintaining resistance to the rotation of the rotating shaft, it can also reduce the influence of the wear of the deceleration sleeve on the deceleration effect.

Description

Magnetic deceleration structure and sunshade

technical field

The invention relates to the technical field of vehicle sunshades, in particular to a magnetic deceleration structure and a sunshade.

Background technique

Cars are an important means of transportation for people to travel and provide convenience for people's travel. Since the car is often outdoors, when the sun shines into the cabin through the window, the interior of the car will become hot, and the strong light will also cause inconvenience to the driver.

In order to block the sunlight shining into the car cabin through the car window, people make car sunshade roller blinds. When the sunshade roller blinds are not in use, the blinds are rotated and rolled up by the rotating shaft. When it is necessary to block the sunlight, the curtain is pulled, and the curtain drives the rotating shaft to rotate, and the curtain is unfolded from the reel; when it is not necessary to block the sunlight, the rotating shaft is driven to rewind the curtain, so that the curtain cannot block the car window, which is convenient for people to drive. vehicle.

Due to the limited space in the car, excessively unfolding the curtains will occupy too much space, causing inconvenience in use. When the rotation speed of the shaft is too fast, the speed of rolling and unfolding of the curtains will also be too fast, which will cause problems in control. In addition, when the rotation of the driving shaft is stopped, the shaft is easy to maintain the rotating state under the action of inertia and continue to rotate by a large angle, so that the curtain is excessively rolled and unfolded. In the process of winding the curtain with the rotating shaft, if the rotating speed of the rotating shaft is too fast, the curtain will shake greatly, which will easily cause the curtain to collide with other objects, and will affect the service life. Therefore, there is a problem in the prior art that the rotational speed of the rotating shaft of the sunshade is difficult to control.

SUMMARY OF THE INVENTION

In order to overcome the above shortcomings of the prior art, the purpose of the present invention is to provide a magnetic deceleration structure and a sunshade, which have the advantage of being able to reduce the rotational speed of the rotating shaft and facilitate control.

The technical scheme adopted by the present invention to solve its technical problems is:

A magnetic deceleration structure includes a fixed casing, a rotating shaft connecting piece, a magnetic piece and a reduction sleeve, the magnetic piece and the fixed casing are clamped in the circumferential direction of the rotating shaft connecting piece, and the outer surface of the reducing sleeve is in the shape of a rotating shaft as a whole. The rotation center of the connecting piece is the cylindrical shape of the shaft center, the speed reduction sleeve is circumferentially clamped with the rotating shaft connecting piece, the speed reduction sleeve is provided with an accommodating cavity, the accommodating cavity is provided with a magnetic conducting member, and the accommodating cavity Any cross-section along the rotational axis direction of the rotating shaft connector is in the form of a circle with the axis of the reduction sleeve as the center, and the magnetic member is located on one side of the reduction sleeve in the radial direction.

As a further improvement of the present invention: the magnetic member is located below the speed reduction sleeve.

As a further improvement of the present invention: the magnetic conductive member is iron sand or iron beads.

As a further improvement of the present invention, the outer surface of the magnetic conductive member is provided with a plastic layer.

As a further improvement of the present invention, the deceleration sleeve is fixedly connected with a support sleeve, the deceleration sleeve is coaxial with the support sleeve, and the total volume of the magnetic conducting member does not exceed half of the volume of the accommodating cavity.

As a further improvement of the present invention, the magnetic conductive member is a discus, and the discus is provided with an arc-shaped surface that fits with the inner wall of the deceleration sleeve.

As a further improvement of the present invention, the deceleration sleeve is provided with a through hole communicating with the accommodating cavity, the width of the through hole is larger than the width of the magnetic conductive member, and the deceleration sleeve is provided with a sealing member to block the through hole.

As a further improvement of the present invention: the sealing member is a screw plug threadedly connected with the reduction sleeve.

As a further improvement of the present invention, the fixed housing is provided with a clamping slot matched with the magnetic piece, and the extension direction of the clamping slot is parallel to the rotation axis of the reduction sleeve.

A sunshade includes a sunshade main body and the above-mentioned magnetic deceleration structure, wherein the magnetic deceleration structure is installed on the sunshade main body.

Compared with the prior art, the beneficial effects of the present invention are:

The magnetic member has a tendency to move toward the direction close to the magnetic member through the action of the magnetic force. When the deceleration sleeve rotates, the magnetic conductive element is kept at a position close to the magnetic element under the action of the magnetic element, so that the magnetic conductive element and the inner wall of the deceleration sleeve generate frictional force. The frictional force provides resistance to the rotation of the deceleration sleeve, thereby reducing the rotation speed of the rotating shaft, achieving the advantage of convenient control of the rotating speed of the rotating shaft, preventing the excessive unfolding and rolling of the curtain, and facilitating the use of the sunshade.

After a period of use, even if the inner wall of the deceleration sleeve is worn to a certain extent, the magnetic part can still make the magnetic conductive part abut against the inner wall of the deceleration sleeve and generate frictional force, so that the deceleration structure can continue to provide the function of reducing the speed of the rotating shaft, which is convenient for control. shaft speed, and has high reliability.

Since the maximum static friction force on the surface of the rotating shaft is greater than the sliding friction force, the driving shaft needs to overcome a larger maximum static friction force during the process from stationary to rotating, and due to the inertia of the rotating shaft, it needs to be larger when the driving shaft changes from stationary to rotating. driving force. In the deceleration structure, when the rotating shaft and the deceleration sleeve are stationary, the magnetic conductive member does not hinder the rotation of the deceleration sleeve, so the driving force required for driving the rotating shaft to rotate from stationary to rotating can be reduced, and the effect of labor saving is achieved.

The deceleration structure has a simple structure, is stable and reliable, can maintain resistance to the rotation of the rotating shaft, and can reduce the influence of the wear of the deceleration sleeve on the deceleration effect.

Description of drawings

Fig. 1 is the structural representation of embodiment 1;

Fig. 2 is the structural representation at A-A place in Fig. 1;

Fig. 3 is the structural representation of embodiment 2;

Fig. 4 is the structural representation of embodiment 3;

FIG. 5 is a schematic structural diagram of Embodiment 4. FIG.

Reference numerals: 11, fixed housing; 12, shaft connecting piece; 13, magnetic piece; 14, card slot; 21, speed reduction sleeve; 22, accommodating cavity; 23, magnetic conductive piece; 24, arc surface; 25, Plastic layer; 26, support sleeve; 27, through hole; 28, seal; 31, sunshade main body.

Detailed ways

The present invention will now be further described in conjunction with the accompanying drawings and examples:

Example 1:

A magnetic deceleration structure, as shown in Figures 1 and 2, includes a fixed casing 11, a rotating shaft connector 12, a magnetic member 13 and a deceleration sleeve 21. The magnetic member 13 is a magnet, and the magnetic member 13 and the fixed casing 11 are along the rotating shaft. The connecting piece 12 is clamped in the circumferential direction of rotation. The rotating shaft connecting piece 12 is connected to the rotating shaft of the sunshade. The speed reduction sleeve 21 is installed on the rotating shaft connecting piece 12. Cylindrical, the reduction sleeve 21 is circumferentially clamped with the shaft connecting piece 12 , the reduction sleeve 21 is provided with a accommodating cavity 22 , and the accommodating cavity 22 is provided with a magnetic conductive member 23 , and the accommodating cavity 22 is arranged along the axis of the rotating shaft connecting piece 12 . Any cross section is in the form of a circle with the axis of the reduction sleeve 21 as the center, and the magnetic member 13 is located on one side of the reduction sleeve 21 in the radial direction.

The magnetic member 13 is located below the deceleration sleeve 21 .

The deceleration sleeve 21 is fixedly connected with a support sleeve 26 , the deceleration sleeve 21 is coaxial with the support sleeve 26 , and the total volume of the magnetic conducting member 23 is half of the volume of the accommodating cavity 22 .

The magnetic conductive member 23 is iron sand.

The deceleration sleeve 21 is provided with a through hole 27 communicating with the accommodating cavity 22 . The width of the through hole 27 is greater than the width of the magnetic conducting member 23 , and the deceleration sleeve 21 is provided with a sealing member 28 for blocking the through hole 27 .

The sealing member 28 is a screw plug threadedly connected with the reduction sleeve 21 .

The fixed housing 11 is provided with a clamping slot 14 which is matched with the magnetic member 13 , and the extension direction of the clamping slot 14 is parallel to the rotation axis of the reduction sleeve 21 .

Compared with the prior art, the beneficial effects of the present invention are:

The shaft connector 12 is used to connect the shaft on the sunshade. When the shaft rotates, the shaft connector 12 drives the deceleration sleeve 21 to rotate. When the deceleration sleeve 21 is resisted, the deceleration sleeve 21 provides resistance to the rotation of the shaft through the shaft connector 12 and reduce the rotation speed of the shaft.

The magnetic member 13 has a tendency to move toward the direction close to the magnetic member 13 by the magnetic force. When the deceleration sleeve 21 rotates, the magnetic conductive member 23 remains at a position close to the magnetic member 13 under the action of the magnetic member 13 , so that the magnetic conductive member 23 and the inner wall of the deceleration sleeve 21 generate frictional force. The frictional force provides resistance to the rotation of the deceleration sleeve 21, thereby reducing the rotation speed of the rotating shaft, achieving the advantage of convenient control of the rotating shaft speed, preventing the curtain from being excessively unfolded and rolled, and facilitating the use of the sunshade.

After a period of use, even if the inner wall of the deceleration sleeve 21 is worn to a certain extent, the magnetic member 13 can still make the magnetic conductive member 23 abut against the inner wall of the deceleration sleeve 21 and generate frictional force, so that the deceleration structure can continue to provide the speed reduction mechanism for reducing the rotational speed of the rotating shaft. function with high reliability.

Since the maximum static friction force on the surface of the rotating shaft is greater than the sliding friction force, the driving rotating shaft needs to overcome the larger maximum static friction force during the process from rest to rotating. When turning, a larger driving force is required to overcome the inertial effect. In this deceleration structure, when the rotating shaft and the deceleration sleeve 21 are stationary, there is no tendency of relative movement between the magnetic conductive member 23 and the deceleration sleeve, so that the magnetic conductive member 23 does not hinder the rotation of the deceleration sleeve 21 at this time, so the rotation of the driving shaft can be reduced. The driving force required in the process from stillness to rotation has a labor-saving effect and is convenient for the use of the sunshade.

The deceleration structure has a simple structure, is stable and reliable, can maintain resistance to the rotation of the rotating shaft, and can reduce the influence of the wear of the deceleration sleeve 21 on the deceleration effect.

The magnetic conductive member 23 has a downward tendency to move under the action of gravity. The magnetic member 13 is located under the deceleration sleeve 21, and can drive the magnetic conductive member 23 to move in the direction close to the magnetic member 13 through the superposition of gravity and magnetic force. The friction force between the magnetic member 13 and the deceleration sleeve 21 is improved, thereby improving the effect of hindering the rotation of the rotating shaft and facilitating the control of the rotating speed of the rotating shaft.

The support sleeve 26 can provide a supporting force for the speed reduction sleeve 21 and improve the structural stability of the speed reduction sleeve 21 . The deceleration sleeve 21 is coaxial with the support sleeve 26 , so that the position of the support sleeve 26 does not change when the deceleration sleeve 21 drives the support sleeve 26 to rotate, preventing the magnetic conducting member 23 from hindering the rotation of the support sleeve 26 . The total volume of the magnetic conductive member 23 is half of the volume of the accommodating cavity 22, so that the height of the magnetic conductive member 23 does not exceed the center height of the deceleration sleeve 21 when standing still, preventing the support sleeve 26 from providing upward support force to the magnetic conductive member 23, ensuring that The magnetic conductive member 23 can provide sufficient resistance to the deceleration sleeve 21 .

The magnetic conductive member 23 is put into the deceleration sleeve 21 through the through hole 27 , so as to facilitate the placement of the magnetic conductive member 23 into the accommodating cavity 22 . By blocking the through hole 27 with the sealing member 28 , the magnetic conductive member 23 can be prevented from accidentally sliding out of the accommodating cavity 22 through the through hole 27 .

Tighten the screw plug, and fix the screw plug on the reduction sleeve 21 through the self-locking of the screw plug. By blocking the through hole 27 with the screw plug, the magnetic conductive member 23 can be prevented from sliding out of the accommodating cavity 22 .

During the rotation of the deceleration sleeve 21, the iron sand can roll in the accommodating cavity 22, so that the friction between the magnetic conductive member 23 and the deceleration sleeve 21 is transformed into rolling friction with less friction, so that the magnetic conductive member 23 is easier to approach. The direction of the magnetic member 13 moves. It is prevented that the frictional force between the magnetic conductive member 23 and the deceleration sleeve 21 is too large to cause the magnetic conductive member 23 to rotate circularly with the deceleration sleeve 21 , thereby improving reliability and stability.

The extension direction of the card slot 14 is parallel to the rotation axis of the deceleration sleeve 21. The fixed housing 11 can provide the magnetic member 13 in the card slot 14 with a circumferential support force for the rotation of the deceleration sleeve 21 to prevent the magnetic member 13 from being in contact with the magnetic conductivity. The movement occurs under the interaction of the piece 23.

In the direction of the rotation axis of the rotating shaft connector 12 , the cross section of the accommodating cavity 22 is circular with the axis of the reduction sleeve 21 as the center, so that the center of the cross section of the accommodating cavity 22 is located on the rotation axis of the reduction sleeve 21 . When the deceleration sleeve 21 rotates, the distance between the end of the accommodating cavity 22 close to the magnetic member 13 and the magnetic member 13 is the same, so the magnetic force between the magnetic member 13 and the magnetic conductive member 23 can be maintained to prevent the magnetic conductive member 23 from being affected by The large change in the magnetic force results in a large change in the resistance received by the reduction sleeve 21 and the rotating shaft, so as to ensure the stability of the rotation of the rotating shaft.

Example 2:

A magnetic deceleration structure, as shown in FIG. 3 , differs from Embodiment 1 in that: the magnetic conductive member 23 is a discus, and the discus is provided with an arc surface 24 that fits with the inner wall of the deceleration sleeve 21 .

This embodiment has the following advantages:

Through the setting of the arc surface 24, the relative sliding of the discus and the deceleration sleeve 21 is made more stable, and the vibration and noise are reduced. Provide stable resistance to the rotating shaft, and it is convenient to control the rotating speed of the rotating shaft.

Example 3:

A magnetic deceleration structure, which is different from Embodiment 1 in that the magnetic conductive member 23 is an iron ball.

This embodiment has the following advantages:

During the rotation of the deceleration sleeve 21, the iron balls can roll in the accommodating cavity 22, so that the friction between the magnetic conductive member 23 and the deceleration sleeve 21 can be converted into rolling friction with less friction, so that the magnetic conductive member 23 can be more easily moved to the surface. Move in the direction close to the magnetic member 13 . It is prevented that the frictional force between the magnetic conductive member 23 and the deceleration sleeve 21 is too large to cause the magnetic conductive member 23 to rotate circularly with the deceleration sleeve 21 , thereby improving reliability and stability. Provide stable resistance to the rotating shaft, and it is convenient to control the rotating speed of the rotating shaft.

Example 4:

A magnetic deceleration structure, as shown in FIG. 4 , differs from Embodiment 1 in that the outer surface of the magnetic conductive member 23 is provided with a plastic layer 25 .

This embodiment has the following advantages:

The plastic layer 25 has better elasticity, can absorb shock and can increase friction, thereby increasing the resistance exerted by the magnetic conductive member 23 on the speed reduction sleeve 21, which is convenient for controlling the rotation speed of the rotating shaft, and can achieve the effect of shock absorption and noise reduction.

Example 5:

A sunshade, as shown in FIG. 5 , differs from Embodiment 1 in that it includes a sunshade main body 31 and the magnetic deceleration structure described in Embodiment 1, and the magnetic deceleration structure is installed on the sunshade main body 31 .

This embodiment has the following advantages:

By installing the magnetic deceleration structure on the sunshade main body 31, resistance can be provided to the rotating shaft on the sunshade, and the rotation speed of the rotating shaft can be controlled to achieve the effect of convenient use.

To sum up, after reading the present document, those of ordinary skill in the art can make other corresponding transformation schemes without creative mental work according to the technical solutions and technical ideas of the present invention, which all belong to the protection scope of the present invention.

Claims (10)

1. A magnetic deceleration structure, characterized in that it comprises a fixed casing (11), a rotating shaft connecting piece (12), a magnetic piece (13) and a reduction sleeve (21), the magnetic piece (13) being connected to the fixed casing (11) Circumferential snap connection along the rotation of the shaft connecting piece (12), the outer surface of the reduction sleeve (21) as a whole is cylindrical with the rotation center of the shaft connecting piece (12) as the axis, and the reduction sleeve ( 21) Circumferentially snap-connected to the rotating shaft connecting piece (12), the deceleration sleeve (21) is provided with an accommodating cavity (22), and the accommodating cavity (22) is provided with a magnetic conducting member (23), the accommodating cavity (22) Any cross-section of the cavity (22) along the rotation axis of the shaft connecting piece (12) is in the form of a circle with the axis of the reduction sleeve (21) as the center, and the magnetic member (13) is located in the reduction sleeve (21) radial side. 2 . The magnetic deceleration structure according to claim 1 , wherein the magnetic member ( 13 ) is located below the deceleration sleeve ( 21 ). 3 . 3 . The magnetic deceleration structure according to claim 1 , wherein the magnetic conductive member ( 23 ) is iron sand or iron beads. 4 . 4 . The magnetic deceleration structure according to claim 3 , wherein a plastic layer ( 25 ) is provided on the outer surface of the magnetic conductive member ( 23 ). 5 . 5 . The magnetic deceleration structure according to claim 1 , wherein the deceleration sleeve ( 21 ) is fixedly connected with a support sleeve ( 26 ), and the deceleration sleeve ( 21 ) is coaxial with the support sleeve ( 26 ). 6 . , the total volume of the magnetic conductive member (23) does not exceed half of the volume of the accommodating cavity (22). 6. A magnetic deceleration structure according to claim 5, characterized in that: the magnetic conductive member (23) is a discus, and the discus is provided with an arc surface (24) that fits with the inner wall of the deceleration sleeve (21). ). 7 . The magnetic deceleration structure according to claim 1 , wherein the deceleration sleeve ( 21 ) is provided with a through hole ( 27 ) that communicates with the accommodating cavity ( 22 ). The width is greater than the width of the magnetic conducting member (23), and the speed reduction sleeve (21) is provided with a sealing member (28) for blocking the through hole (27). 8 . The magnetic deceleration structure according to claim 7 , wherein the sealing member ( 28 ) is a screw plug threadedly connected with the deceleration sleeve ( 21 ). 9 . 9 . The magnetic deceleration structure according to claim 1 , wherein the fixed housing ( 11 ) is provided with a card slot ( 14 ) matched with the magnetic member ( 13 ), and the card slot ( 14 ) The direction of extension is parallel to the rotation axis of the reduction sleeve (21). 10. A sunshade, characterized by comprising a sunshade main body (31) and the magnetic deceleration structure according to any one of claims 1 to 9, wherein the magnetic deceleration structure is mounted on the sunshade main body (31).

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