1. A door collision prevention device is characterized in that: the device comprises a mounting box mounted at the lower end of a door, a telescopic mechanism mounted in the mounting box and a controller mounted in the mounting box, wherein a detector for detecting the moving speed is mounted on the mounting box, the lower end of the telescopic mechanism extends to the lower part of the mounting box, the lower end of the telescopic mechanism is connected with a brake part, and the detector and the telescopic mechanism are respectively and electrically connected with the controller; when the detector detects that the moving speed of the installation box is larger than or equal to a set value or the acceleration of the installation box is larger than or equal to the set value, the controller controls the telescopic mechanism to extend downwards, so that the brake part is in contact with the ground to brake.

2. A door striker preventer as claimed in claim 1, wherein: the telescopic mechanism is a cylinder, and an output shaft of the cylinder is connected with the brake part; an air pump for providing an air source for the air cylinder is further installed in the installation box and electrically connected with the controller.

3. A door striker preventer as claimed in claim 1, wherein: the detector is an infrared ray velocimeter and is arranged at the lower end of the installation box.

4. A door striker preventer as claimed in claim 1, wherein: the brake part is including the mounting box of being connected with telescopic machanism lower extreme and the spherical wheel of being connected with the erection joint, the shaping of installation lower part has the cavity that the opening down corresponds with spherical wheel, the shape of cavity is for being greater than the sphere of half ball, spherical wheel rotates with the cavity to be connected.

5. A door striker preventer as claimed in claim 4, wherein: the spherical wheel is made of rubber.

6. A door striker preventer as claimed in claim 1, wherein: the mounting box is including integrated into one piece's upper wall and lateral wall, and the mounting box is still including the diapire of being connected with the lateral wall lower extreme, is provided with the through-hole that telescopic machanism passes through on the diapire, lateral wall lower extreme periphery is connected with the connection limit, the diapire passes through bolted connection with the connection limit.

Background

The door is not fixed, and when the door can rotate freely, the door is blown quickly when encountering strong wind, so that the door collides with the door frame or the door stopper or the wall violently, and the door, the door frame, the door stopper or the wall is easy to be damaged.

Disclosure of Invention

In view of the above circumstances, an object of the present invention is to provide a door crash preventer for decelerating or even stopping the rotation of a door when the door is rapidly rotated, so that the door can be prevented from violently colliding with a door frame or a door stopper or a wall.

In order to realize the purpose of the invention, the following technical scheme is adopted for realizing the purpose: a door collision prevention device comprises an installation box installed at the lower end of a door, a telescopic mechanism installed in the installation box and a controller installed in the installation box, wherein a detector for detecting the moving speed is installed on the installation box, the lower end of the telescopic mechanism extends to the lower side of the installation box, the lower end of the telescopic mechanism is connected with a brake part, and the detector and the telescopic mechanism are respectively and electrically connected with the controller; when the detector detects that the moving speed of the installation box is greater than or equal to a set value or the acceleration of the installation box is greater than or equal to the set value, the controller controls the telescopic mechanism to extend downwards, so that the brake part is in contact with the ground to brake.

As a preferable scheme: the telescopic mechanism is a cylinder, and an output shaft of the cylinder is connected with the brake part; an air pump for providing an air source for the air cylinder is further installed in the installation box and electrically connected with the controller.

As a preferable scheme: the detector is an infrared ray velocimeter and is arranged at the lower end of the installation box.

As a preferable scheme: the brake part is including the mounting box of being connected with telescopic machanism lower extreme and the spherical wheel of being connected with the erection joint, the shaping of installation lower part has the cavity that the opening down corresponds with spherical wheel, the shape of cavity is for being greater than the sphere of half ball, spherical wheel rotates with the cavity to be connected.

As a preferable scheme: the spherical wheel is made of rubber.

As a preferable scheme: the mounting box is including integrated into one piece's upper wall and lateral wall, and the mounting box is still including the diapire of being connected with the lateral wall lower extreme, is provided with the through-hole that telescopic machanism passes through on the diapire, lateral wall lower extreme periphery is connected with the connection limit, the diapire passes through bolted connection with the connection limit.

Compared with the prior art, the invention has the main beneficial effects that:

1. the invention utilizes the detector to detect the moving speed or acceleration of the installation box, namely the speed or acceleration of the door, when the speed or acceleration of the door is greater than a set value, the controller controls the telescopic mechanism to extend downwards, so that the brake part is contacted with the ground to brake, the door is decelerated even stops rotating, and the door can be prevented from violently colliding with the door frame or the door stopper or the wall, so that the door and the door frame or the door stopper or the wall are not easy to be damaged.

2. The telescopic mechanism adopts the cylinder, so the stroke of the telescopic mechanism extension is convenient to control, and the braking force is easy to control.

3. The detector adopts an infrared velocimeter, is common, and can also measure accurately in a dark environment.

4. The brake part is mounting box and spherical wheel, and spherical wheel can lie in the cavity arbitrary direction and rotate, is equivalent to the universal wheel, but the structure is simpler, can utilize the rolling friction brake along with the arbitrary direction rotation of door, so can not die with ground and contradict, reduces the wearing and tearing to ground, and is difficult for sending the noise of thorn ear.

5. The spherical wheel is made of rubber, so that the spherical wheel is not easy to be abraded and damaged, the ground is not easy to be scratched, and the service life of the spherical wheel is prolonged.

6. The mounting box is including integrated into one piece's upper wall and lateral wall, and the mounting box is still including the diapire of being connected with the lateral wall lower extreme, diapire and lateral wall screwed connection, can open the mounting box like this and install corresponding part (controller and telescopic machanism etc.), also be convenient for unpack apart the maintenance.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

fig. 2 is a cross-sectional view of the present invention.

Reference numerals: 1. installing a box; 11. a connecting edge; 12. a bottom cover; 121. a dust-proof sleeve; 122. a detector; 2. a cylinder; 21. an output rod; 22. mounting a box; 221. a spherical wheel; 3. a controller; 4. an air pump.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1-2 in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention relates to a door collision prevention device, which is shown in figures 1 and 2: the door comprises a mounting box 1 arranged at the lower end of a door, a telescopic mechanism arranged in the mounting box 1 and a controller 3 arranged in the mounting box 1. Install bin 1 is including integrated into one piece's upper wall and lateral wall, install bin 1 still including the diapire of being connected with the lateral wall lower extreme. Be provided with the through-hole that telescopic machanism passes through on the diapire, lateral wall lower extreme periphery is connected with connection limit 11, the diapire passes through the screw connection with connection limit 11. Install the detector 122 that detects translation rate on install bin 1, detector 122 is the infrared ray tachymeter (also can adopt the gyroscope sensor, installs in install bin 1) to install at 1 diapire lower extreme of install bin. Telescopic machanism is cylinder 2, and the output shaft lower extreme of cylinder 2 extends to installation box 1 below through the through-hole of diapire, and the output shaft lower extreme of cylinder 2 connects the brake portion. The dust cover 121 is connected at the through-hole periphery to diapire upper end, and the dust cover overlaps on the cylinder output shaft, so makes the difficult gap entering between through-hole and the output shaft of following of dust etc.. The cylinder 2 and the infrared velocimeter are respectively electrically connected with the controller 3.

Further: still be installed in the install bin 1 and provide the air pump 4 of air supply for cylinder 2, air pump 4 and 3 electric connection of controller can set up a plurality of ventilative pores on the diapire, guarantee that air pump 4 can take out gas, cylinder 2 can exhaust gas.

Further: the brake part comprises a mounting box 22 connected with the lower end of an output shaft of the cylinder 2 and a spherical wheel 221 connected with the mounting box, a cavity with a downward opening and corresponding to the spherical wheel 221 is formed in the lower mounting part, the cavity is spherical with a shape larger than a half ball, and the spherical wheel 221 is rotatably connected with the cavity. The spherical wheel 221 is made of rubber, so that the spherical wheel 221 is not easy to wear and scratch the ground.

Further: the invention can also be provided with a pressure sensor which is arranged between the mounting box and the output shaft of the cylinder or in the cavity of the mounting box and is contacted with the upper end of the spherical wheel, thus measuring the pressure between the ground and the spherical wheel, thus setting the pressure according to the moving speed of the door, namely increasing the friction force and ensuring the door to stop before the door hits the door frame, the wall or the door stopper. For example, when the moving speed of the installation box is 1m/s, the pressure generated by the fact that the air cylinder drives the brake part to move downwards and abut against the ground is 10N; for example, when the moving speed of the installation box is 1.5m/s, the pressure generated by the fact that the air cylinder drives the brake part to move downwards and collide with the ground is 15N.

The invention can be externally connected with a power supply which is connected with a controller, and also can be provided with an accumulator in the mounting box, and the accumulator is connected with the controller. The invention is arranged at the position of the lower end of the door far away from the hinge (the position is far away from the hinge as far as possible, so that the resistance arm can be enlarged, the door can be easily stopped), or a groove is dug at the position, the mounting box of the invention is upward, the bottom wall is downward embedded, the bottom wall is positioned outside the groove, or the mounting box is fixed on the door by using screws. When the detector detects that the speed of the movement of the installation box (namely the movement of the position corresponding to the installation box on the door) is greater than or equal to a set value (can be set to be 0.8 m/s), or the acceleration of the installation box is greater than or equal to a set value (can be set to be 0.5m/s2), the controller controls the output shaft of the air cylinder to extend downwards, so that the spherical wheel of the braking part is in contact with the ground to brake, the door is prevented from colliding with a door frame, a door stopper or a wall, and when the speed or the acceleration is lower than the set value or is equal to 0, the air cylinder retracts again, and the braking part does not work any more.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and those skilled in the art should make general changes and substitutions within the technical scope of the present invention to be included in the protection scope of the present invention.