A speed limiting device for emergency escape from high-rise buildings

Abstract

The present invention relates to the technical field of high-rise emergency escape, and specifically discloses a speed limiting device for high-rise emergency escape, comprising a main transmission gear, a main acceleration gear, a secondary transmission gear coaxially connected to the main acceleration gear, and a secondary acceleration gear. The main transmission gear is meshed with the main acceleration gear, and the secondary transmission gear is meshed with the secondary acceleration gear. A collision wheel is coaxially connected to the side of the secondary transmission gear facing away from the main acceleration gear, and a speed limiting cam that fits with the collision wheel is coaxially connected to one side of the secondary acceleration gear. A plurality of guide wheels are provided for rotating inside the collision wheel to prevent the limit cam from getting stuck. The purpose of the present invention is to solve the problem that in a traditional high-rise escape device, the speed limiting device may lose its braking function after being not used for a long time, thereby affecting the normal use of the high-rise escape device.

Description

Technical Field

[0001] The present application relates to the technical field of high-rise emergency escape, and specifically discloses a speed limiting device for high-rise emergency escape. Background Art

[0002] With the increasing number of high-rise buildings in cities, how to quickly and safely escape from high-rise buildings to the ground in the event of emergencies such as fires and earthquakes has become a global issue. Although firefighters and other professional rescuers can quickly intervene to provide rescue to trapped people, under normal circumstances, it is not always possible to provide timely assistance. Therefore, such disasters always pose a serious threat to the lives of those living in high-rise buildings.

[0003] In case of emergency, escapees need to use high-rise escape devices and handrails installed on the walls of escape stairs to escape quickly. During the escape process, the high-rise escape device will be installed on the handrail that matches the high-rise escape device, and then the high-rise escape device will slide down with the gravity of the escapee. However, due to the high floor and the long handrail, the acceleration time will continue to increase. If the escape device does not limit the speed, the escape device will appear to be too fast, which can easily cause the high-rise escape device to fall off the handrail or cause other secondary injuries to the escapee.

[0004] At present, in order to reduce the risk factor of using high-rise escape devices, some speed limiting devices are often added to high-rise escape devices to ensure that their speed is within a controllable and safe range. However, high-rise escape devices are emergency devices with low usage frequency. After installation, they may not be used for a long time. The current speed limiting devices are often electrical braking methods. After being in standby mode for a long time, if they are not repaired and quality tested for a long time, their braking function may be lost, thereby affecting the normal use of the high-rise escape device. Therefore, in view of this, the inventor provides a speed limiting device for high-rise emergency escape to solve the above-mentioned problem. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem that the speed limiting device of a traditional high-rise escape device may lose its braking function after being not used for a long time, thereby affecting the normal use of the high-rise escape device.

[0006] To achieve the above-mentioned objectives, the basic solution of the present invention provides a speed limiting device for high-rise emergency escape, comprising a main transmission gear, a main acceleration gear, a secondary transmission gear coaxially connected to the main acceleration gear, and a secondary acceleration gear, wherein the main transmission gear meshes with the main acceleration gear, the secondary transmission gear meshes with the secondary acceleration gear, a collision wheel is coaxially connected to the side of the secondary transmission gear facing away from the main acceleration gear, and a speed limiting cam that engages with the collision wheel is coaxially connected to one side of the secondary acceleration gear;

[0007] A number of guide wheels are provided for rotating inside the collision wheel to prevent the limit cam from getting stuck. Transmission rods are provided for sliding on the side walls of the guide wheels. A main extrusion ball is fixedly connected to one end of the transmission rod located inside the guide wheel. A contact is provided on the end of the transmission rod located outside the guide wheel. A top column that fits with the contact is fixed on the collision wheel. Oil chambers are symmetrically provided in the guide wheel. Pistons are provided for sliding in the oil chambers. A number of overflow valves connected to the oil chambers are provided on the guide wheel. A push rod fixed to the piston is provided for sliding on the side wall of the oil chamber. A secondary extrusion ball that fits with the main extrusion ball is fixedly connected to the end of the push rod away from the oil chamber.

[0008] The principles and effects of this basic solution are:

[0009] 1. When the high-rise escape device is in use, it drives the main transmission gear to rotate, and the main transmission gear drives the main acceleration gear meshing with it to rotate. The rotation of the main acceleration gear drives the auxiliary transmission gear coaxially connected with it to rotate, and then the rotation of the auxiliary transmission gear drives the auxiliary acceleration gear meshing with it to rotate. In this process, the speed limiting cam and the collision wheel complete the rotation in opposite directions, and then collide with each other. At the same time, through multiple transmission accelerations of the gears, the speed limiting cam is driven to hit the collision wheel multiple times to consume the motion inertia, thereby realizing the speed limit of the escape device.

[0010] 2. When the speed limiting cam collides with the collision wheel, it will drive the guide wheel to rotate. The rotation of the guide wheel can effectively ensure that the speed limiting cam will not be stuck on the collision wheel. At the same time, the sliding contact on the guide wheel will collide and squeeze with the support on the collision wheel, and then cause the transmission rod to move into the guide wheel. The inward displacement of the transmission rod causes the main extrusion ball to squeeze the auxiliary extrusion ball, causing the push rod to drive the piston to squeeze the oil chamber, and the lubricating oil pressure in the oil chamber increases. When the pressure value set by the relief valve is reached, the lubricating oil is ejected from the oil chamber to the connection between the guide wheel and the collision wheel, effectively reducing the possibility of the guide wheel being stuck due to long-term non-use, improving the collision smoothness of the speed limiting cam and the collision wheel, and ensuring the stable operation of the entire speed limiting device.

[0011] Compared with the existing technology, the speed limiting device of this high-rise escape device uses a mechanical structure to replace the existing electrical braking method to limit the speed, effectively solving the problem that the braking function of the speed limiting device may be lost after not being used for a long time. At the same time, it solves the problem that the guide wheel collides with the speed limiting cam when not used for a long time. It has high stability in use and is easy to promote and use on a large scale.

[0012] Furthermore, a positioning ring is fixedly connected to the inner wall of the guide wheel, and the transmission rod is slidably arranged in the positioning ring. The guide wheel has an opening larger than the contact, and then a positioning ring is provided on the guide wheel to ensure that the transmission rod does not deviate.

[0013] Furthermore, a safety pin is inserted into the transmission rod, which is attached to the side wall of the transmission rod and inserted into the transmission rod, effectively preventing the guide wheel from accidentally rotating during transportation, causing the lubricating oil in the oil chamber to be accidentally sprayed out.

[0014] Furthermore, the invention also includes a support plate for mounting the main transmission gear, the main acceleration gear, the auxiliary transmission gear, and the auxiliary acceleration gear. The support plate is fixedly connected to an oil tank, and an oil drain hole is formed in the side wall of the oil tank. A sealing rod that fits in the oil drain hole is rotatably connected to the side wall of the oil tank. The sealing rod is provided with an auxiliary spring fixed to the oil tank. A pressure rod that can move the sealing rod is coaxially connected to one side of the main transmission gear. After long periods of non-use, various gears may rust. An oil tank is provided on the support plate for adding lubricating oil to these gears to improve their transmission efficiency. The main transmission gear rotates, driving the pressure rod to make a circular motion. Each time the pressure rod makes a circular motion, it can press one end of the sealing rod downward. According to the principle of leverage, the other end of the sealing rod will be lifted, and the oil drain hole will open, allowing the lubricating oil in the oil tank to flow out and fall on a certain gear due to gravity. Then, each gear transmits the lubricating oil to each gear.

[0015] Furthermore, a sealing film is provided on the oil drain hole, and a cutting blade is provided on the sealing rod to cut the sealing film. When the oil tank is not used for a long time, the sealing film can prevent the lubricating oil in the oil tank from leaking out of the oil drain hole. When the sealing cover is tilted for the first time after use, the sealing film can be cut, and the lubricating oil can flow out of the oil drain hole normally.

[0016] Furthermore, a return spring is fixedly connected between the auxiliary squeezing ball and the oil chamber, and the return spring can increase the return force of the piston and the push rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of the front structure of a speed limiting device for emergency escape in a high-rise building proposed in an embodiment of the present application is shown;

[0019] Figure 2 A schematic diagram of the rear structure of a speed limiting device for emergency escape in a high-rise building proposed in an embodiment of the present application is shown;

[0020] Figure 3 A partial cross-sectional view of a guide wheel in a high-rise emergency escape speed limiting device proposed in an embodiment of the present application is shown;

[0021] Figure 4 A front view of a speed limiting device for high-rise emergency escape proposed in an embodiment of the present application is shown;

[0022] Figure 5 A cross-sectional view of a middle collision wheel of a speed limiting device for high-rise emergency escape proposed in an embodiment of the present application is shown;

[0023] Figure 6 A partially enlarged view of the oil tank in a speed limiting device for high-rise emergency escape proposed in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0025] The following is a further detailed description through specific implementation methods:

[0026] The figure marks in the drawings of the specification include: positioning shaft 1, main transmission gear 2, main acceleration gear 3, auxiliary transmission gear 4, auxiliary acceleration gear 5, speed limiting cam 6, guide wheel 7, collision wheel 8, top column 9, contact 10, transmission rod 11, positioning ring 12, main squeezing ball 13, auxiliary squeezing ball 14, return spring 15, push rod 16, piston 17, lubricating oil 18, overflow valve 19, oil chamber 20, support plate 21, oil tank 22, pressure rod 23, sealing rod 24, auxiliary spring 25.

[0027] A speed limiting device for high-rise emergency escape, for example Figure 1 and Figure 2 As shown, the main transmission gear 2 is meshed with the main acceleration gear 3, the auxiliary transmission gear 4 is meshed with the auxiliary acceleration gear 5, and the auxiliary transmission gear 4 is coaxially connected with the main acceleration gear 3, as shown in FIG. Figure 4 As shown, the positioning shaft 1 for mounting the main transmission gear 2, the main acceleration gear 3, the auxiliary transmission gear 4 and the auxiliary acceleration gear 5 is mounted on the support plate 21, and an oil tank 22 is welded on the front of the support. Figure 6 As shown, an oil drain hole is machined at the lower right corner of the front of the oil tank 22. A sealing rod 24 for sealing the oil drain hole is rotatably connected to the lower right corner of the oil tank 22. The left end of the sealing rod 24 is connected to an auxiliary spring 25 fixedly connected to the oil tank 22. A sealing film is pasted on the oil drain hole, and an unsealing blade that can cut the sealing film is welded to the sealing rod 24. Figure 4 As shown, a pressure rod 23 capable of moving a sealing rod 24 is coaxially connected to one side of the main transmission gear 2.

[0028] like Figure 2 and Figure 4 As shown, a collision wheel 8 is coaxially connected to the side of the auxiliary transmission gear 4 away from the main acceleration gear 3, and a speed limiting cam 6 that fits with the collision wheel 8 is coaxially connected to the side of the auxiliary acceleration gear 5. Four guide wheels 7 are rotatably installed in the collision wheel 8, as shown in FIG. Figure 3 As shown, a positioning ring 12 is welded to the inner wall of the guide wheel 7, and a transmission rod 11 is slidably set in the positioning ring 12. A safety pin is inserted into the transmission rod 11. The main extrusion ball 13 is welded to one end of the movable rod located inside the guide wheel 7, and a contact 10 is welded to one end of the transmission rod 11 located outside the guide wheel 7. Figure 5 As shown, four top posts 9 are welded on the collision wheel 8 to fit with the contacts 10. Figure 3 A group of oil chambers 20 are symmetrically installed in the guide wheel 7 shown. Lubricating oil 18 is placed in the oil chamber 20 and the oil tank 22. A piston 17 is slidably arranged in the oil chamber 20. Several overflow valves 19 connected to the oil chamber 20 are inlaid on both sides of the guide wheel 7. A push rod 16 fixedly connected to the piston 17 is slidably arranged on the side wall of the oil chamber 20. A secondary squeezing ball 14 that fits with the main squeezing ball 13 is welded to the end of the push rod 16 away from the oil chamber 20, and a return spring 15 is arranged between the secondary squeezing ball 14 and the oil chamber 20.

[0029] When in use, install the support plate 21 at the designated position of the high-rise escape device, then coaxially connect the roller of the high-rise escape device with the main transmission gear 2, and then move the high-rise escape device to the use position, unplug the safety pin, and it is ready for use.

[0030] When a fire or other dangerous situation occurs in a high-rise building, the escapees can use the high-rise escape device and the track that matches the high-rise escape device to escape. When in use, the high-rise escape device drives the main transmission gear 2 to rotate, and the main transmission gear 2 drives the main acceleration gear 3 engaged with it to rotate. The main acceleration gear 3 rotates and drives the auxiliary transmission gear 4 coaxially connected with it to rotate, and then the auxiliary transmission gear rotates and drives the auxiliary acceleration gear 5 engaged with it to rotate. In this process, the speed limiting cam 6 and the collision wheel 8 complete rotation in opposite directions, and then collide with each other. At the same time, through multiple transmission accelerations of the gears, the speed limiting cam 6 is finally driven to hit the collision wheel 8 multiple times to consume the motion inertia, thereby realizing the speed limit of the escape device.

[0031] When the speed limiting cam 6 collides with the collision wheel 8, it will drive the guide wheel 7 to rotate. The rotation of the guide wheel 7 can effectively ensure that the speed limiting cam 6 will not be stuck on the collision wheel 8. At the same time, the contact 10 slidingly arranged on the guide wheel 7 will collide and squeeze with the support on the collision wheel 8, and then cause the transmission rod 11 to move into the guide wheel 7. The transmission rod 11 moves inward, thereby causing the main squeezing ball 13 to squeeze the secondary squeezing ball 14, causing the push rod 16 to drive the piston 17 to squeeze the oil chamber 20, and the pressure of the lubricating oil 18 in the oil chamber 20 increases. When the pressure value set by the relief valve 19 is reached, the lubricating oil 18 is ejected from the oil chamber 20 to reach the connection between the guide wheel 7 and the collision wheel 8, effectively reducing the situation where the guide wheel 7 is stuck due to long-term non-use, improving the collision smoothness of the speed limiting cam 6 and the collision wheel 8, and ensuring the stable operation of the entire speed limiting device.

[0032] If the various gears are rusted and the transmission is not smooth, the main transmission gear 2 rotates, driving the pressure rod 23 to make a circular motion. Then, each time the pressure rod 23 makes a circular motion, it can press one end of the sealing rod 24 downward. According to the principle of lever, the other end of the sealing rod 24 will be lifted. At this time, the oil drain hole opens, and the lubricating oil 18 in the oil tank 22 can flow out and fall on a certain gear by gravity at any time. Then, each gear transmits to each other, and the lubricating oil 18 is leaked on each gear.

[0033] The speed limiting device of the high-rise escape device uses a mechanical structure to replace the existing electrical braking speed limiting method, which effectively solves the problem that the braking function of the speed limiting device may be lost after not being used for a long time. At the same time, it solves the problem that the guide wheel 7 collides with the speed limiting cam 6 when not used for a long time. It has high stability in use and is easy to promote and use on a large scale.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A speed limiting device for high-rise emergency escape, characterized in that: It includes a main transmission gear connected to the escape device, a main acceleration gear, a sub-transmission gear coaxially connected to the main acceleration gear, and a sub-acceleration gear, the main transmission gear meshes with the main acceleration gear, the sub-transmission gear meshes with the sub-acceleration gear, the sub-transmission gear is coaxially connected to a collision wheel on the side away from the main acceleration gear, and the sub-acceleration gear is coaxially connected to a speed limiting cam that fits with the collision wheel on one side; A plurality of guide wheels are provided for rotating inside the collision wheel to prevent the limit cam from getting stuck. Transmission rods are provided for sliding on the side walls of the guide wheels. A main extrusion ball is fixedly connected to one end of the transmission rod located inside the guide wheel. A contact is provided on the one end of the transmission rod located outside the guide wheel. A top column that fits with the contact is fixed on the collision wheel. Oil chambers are symmetrically provided in the guide wheel. Pistons are provided for sliding in the oil chambers. A plurality of relief valves communicating with the oil chambers are provided on the guide wheel. A push rod fixed to the piston is provided for sliding on the side wall of the oil chamber. A secondary extrusion ball that fits with the main extrusion ball is fixed on the end of the push rod away from the oil chamber. A positioning ring is fixedly connected to the inner wall of the guide wheel, and the transmission rod is slidably arranged in the positioning ring; A return spring is fixedly connected between the auxiliary squeezing ball and the oil chamber.

2. A high-rise emergency escape speed limiting device according to claim 1, characterized in that: A safety latch is inserted on the transmission rod.

3. A high-rise emergency escape speed limiting device according to claim 1, characterized in that: It also includes a support plate for installing the main transmission gear, main acceleration gear, auxiliary transmission gear and auxiliary acceleration gear. The support plate is fixedly connected to the oil tank. The side wall of the oil tank is provided with an oil drain hole. The side wall of the oil tank is rotatably connected to a sealing rod that fits with the oil drain hole. The sealing rod is provided with an auxiliary spring fixed to the oil tank. A pressure rod that can move the sealing rod is coaxially connected to one side of the main transmission gear.

4. A high-rise emergency escape speed limiting device according to claim 3, characterized in that: A sealing film is provided on the oil drain hole, and a sealing rod is provided with an unsealing blade capable of cutting the sealing film.

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