A movable safety protection device

Abstract

A movable safety protection device. The present invention relates to the technical field of high-altitude operation protection devices. A lead screw lifting rod is arranged on a base, a boom is fixedly arranged at the upper end of the lead screw lifting rod, a plurality of safety hanging rings are fixedly arranged on the boom, a support frame is fixedly arranged on a trolley, the base is rotatably arranged on the support frame through a rotating shaft, a counterweight water tank is arranged on the trolley, a variable-speed transmission member is arranged on the support frame, and the variable-speed transmission member is in transmission connection with the rotating shaft of the base. A buffer stress member is arranged on the trolley, and the buffer stress member is in transmission connection with the variable-speed transmission member; based on the liftable boom structure, a pushable trolley structure is provided to support the boom. At the same time, a counterweight structure is arranged on the trolley structure to provide the overall stability of the device. At the same time, a rotatable structure and a deceleration buffer structure are provided for the base structure of the installed boom, so as to be able to quickly reduce the falling speed in case of accidental fall, and at the same time ensure that the falling worker lands smoothly.

Description

Technical Field

[0001] The present invention relates to the technical field of high-altitude operation protection devices, and particularly relates to a movable safety protection device. Background Art

[0002] There is a existing safety device for yard truck unloading, which is mainly used to assist workers in hanging safety belts when they are working on the vehicle hopper. The main structure of this device is a support column with three-claw feet, and a lead screw lifting rod arranged thereon. And a horizontal jib is arranged at the upper end of the lead screw lifting rod, and a safety hanging ring is arranged on the jib. When in use, the jib is lifted by the lead screw lifting rod, and the lead screw lifting rod and the support column are installed and fixed relying on the hanging points of the truck hopper. Workers hang the safety belt on the safety hanging ring, that is, when a worker accidentally falls, the worker is prevented from falling to the ground by being pulled by the safety belt.

[0003] This safety structure has certain disadvantages. The stability support it provides completely depends on the fulcrum of the vehicle structure, and the structure of this device is limited by the vehicle models used, and its applicable range is narrow. Therefore, it is necessary to improve this safety frame structure. Summary of the Invention

[0004] The purpose of the present invention is to provide a movable safety protection device in view of the defects and deficiencies of the prior art. Based on a liftable jib structure, a trolley structure that can be pushed forward is provided to support the jib. At the same time, a counterweight structure is arranged on the trolley structure to provide the overall stability of the device. At the same time, a rotatable structure and a deceleration buffer structure are provided for the base structure for installing the jib, so as to quickly reduce the falling speed in case of an accidental fall, and at the same time ensure that the falling worker lands smoothly. This device is based on the trolley and the counterweight thereon to set up a support structure, so as to facilitate the use of this device to provide safety protection for users in any use environment.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] It includes a base, a lead screw lifting rod, a jib, and safety hanging rings. The lead screw lifting rod is arranged on the base, the jib is fixedly arranged at the upper end of the lead screw lifting rod, and there are several safety hanging rings fixedly arranged on the jib. It further includes:

[0007] A trolley and a support frame, where the support frame is fixedly arranged on the trolley, and the base is rotatably arranged on the support frame through a rotating shaft;

[0008] A counterweight water tank, and the counterweight water tank is arranged on the trolley;

[0009] A variable-speed transmission member, and the variable-speed transmission member is arranged on the support frame and is in transmission connection with the rotating shaft of the base;

[0010] A buffer stress-bearing member, the buffer stress-bearing member is arranged on the trolley, and the buffer stress-bearing member is in transmission connection with the variable-speed transmission member;

[0011] A buffer counterweight member, the buffer counterweight member is arranged on the buffer stress-bearing member;

[0012] During use, workers load and unload goods on the truck. At this time, the trolley is placed on the side of the truck, and the boom is lifted by the screw lifter. The workers hang the safety belts they wear on the safety hanging rings. Then, when the workers fall, they are hung on the boom by the safety belts. At this time, the boom, the screw lifter, and the base are an integral whole. At this time, the base tilts and rotates sideways. The variable-speed transmission member and the buffer stress-bearing member provide deceleration buffering for the rotation of the base. And at this time, the buffer counterweight member provides a reverse thrust for buffering for the buffer stress-bearing member. Then, when the base rotates, it is buffered and decelerated by force, ensuring the safety of the workers when they fall and keeping the workers descending to the ground at a slow speed.

[0013] Preferably, the variable-speed transmission member includes:

[0014] A support shaft, the support shaft is rotatably arranged on the support frame through a bearing, and the support shaft is in transmission connection with the rotating shaft of the base through a variable-speed gear set;

[0015] A transmission shaft, the transmission shaft is rotatably arranged on the support frame through a bearing, and the transmission shaft is in transmission connection with the support shaft through a bevel gear set;

[0016] A driving gear, the driving gear is sleeved and fixed at the lower end of the transmission shaft;

[0017] Two threaded rods, and the threaded rods are symmetrically arranged front and back and rotatably arranged on the support frame through bearings. The front threaded rod is provided with a right-handed thread, and the rear threaded rod is provided with a left-handed thread;

[0018] A driven gear, the driven gear is sleeved and fixed at the lower end of the threaded rod, and the driven gear is meshed with the driving gear;

[0019] During use, the base rotates and drives the support shaft to rotate through the variable-speed gear set. The support shaft drives the transmission shaft to rotate through the bevel gear set. The transmission shaft drives the threaded rods to rotate through the meshed driving gear and driven gear. And the rotation speeds and rotation directions of the two threaded rods are the same.

[0020] Preferably, the buffer stress-bearing member includes:

[0021] A load-bearing bracket, the load-bearing bracket is fixedly arranged on the trolley, and slide rail pairs are arranged on both the left and right sides of the load-bearing bracket;

[0022] Two chain transmission mechanisms, which are symmetrically arranged front and back in the load-bearing bracket, and the sprockets of the chain transmission mechanisms are rotatably arranged on the load-bearing bracket through bearings;

[0023] The main load-bearing seat is slidably arranged on the right slide rail pair of the load-bearing bracket, and the main load-bearing seat is fixedly arranged on the right chain of the chain transmission mechanism;

[0024] The threaded sleeve is fixedly arranged on the main load-bearing seat, and the threaded sleeve is screwed onto the threaded rod through a thread;

[0025] The auxiliary load-bearing seat is slidably arranged on the left slide rail pair of the load-bearing bracket, and the auxiliary load-bearing seat is fixedly arranged on the left chain of the chain transmission mechanism;

[0026] During use, the threaded rod rotates. Then, the threaded rod pushes the main load-bearing seat to slide on the slide rail pair of the load-bearing bracket through the threaded sleeve. At this time, the thread groove directions on the front and rear threaded rods are opposite. Then, the front and rear threaded rods rotate, and the moving directions of the front and rear threaded sleeves are opposite, that is, the moving directions of the front and rear main load-bearing seats are opposite. The main load-bearing seat drives the auxiliary load-bearing seat to slide on the left slide rail pair of the load-bearing bracket through the chain transmission mechanism.

[0027] Preferably, the buffer counterweight member includes:

[0028] The storage rack is fixedly arranged on the trolley, and the partition of the storage rack is provided with an opening;

[0029] The fork arm is fixedly arranged on the auxiliary load-bearing seat, and the fork arm is located below the partition of the storage rack and is inserted into the storage rack from the right side of the storage rack;

[0030] The guide rods are several and are fixedly arranged in an array in the storage rack;

[0031] The load-bearing plate is movably sleeved on the guide rods above the partition of the storage rack;

[0032] The jacking seat is fixedly arranged on the fork arm, and the jacking seat passes through the opening on the partition of the storage rack and abuts against the lower surface of the load-bearing plate;

[0033] The buffer spring is sleeved on the guide rod, and the lower end of the buffer spring is movably abutted against the upper surface of the load-bearing plate;

[0034] During use, the auxiliary load-bearing seat drives the fork arm to move. Then, as the moving directions of the two auxiliary load-bearing seats are opposite, the rising auxiliary load-bearing seat drives the fork arm to rise. The fork arm drives the jacking seat to rise. The jacking seat pushes the load-bearing plate upward. Then, the load-bearing plate pushes the buffer spring to compress the buffer spring. And as the buffer spring is compressed, the buffer spring provides an increasing downward reaction force for the load-bearing plate. Then, this reaction force is transmitted to the rotating shaft of the base, providing a resistance buffer for the rotation of the base.

[0035] Preferably, a side edge support plate is fixedly arranged on the trolley, and the counterweight water tank is inserted into the side edge support plate;

[0036] Preferably, a support plate is fixedly arranged on the wall of the counterweight water tank facing the storage rack, and the support plate is inserted into the storage rack from the left side of the storage rack above the partition of the storage rack. The support plate is movably sleeved on the guide rod, and the upper end of the buffer spring is movably abutted against the lower surface of the support plate.

[0037] Preferably, a positioning seat is fixedly arranged on the lower side wall of the base far from the rotation shaft connecting the base and the support frame. A positioning pin is movably inserted through the positioning seat, and the positioning pin is inserted into the support frame after passing through the positioning seat.

[0038] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0039] 1. The device is provided with a telescopic screw lifting rod, and based on this, a boom and a safety hanging ring are arranged, so that when in use, the boom is lifted for workers to hang the safety belt, and then when a worker accidentally falls, the boom pulls the safety belt to prevent the worker from falling to the ground;

[0040] 2. The base for installing the screw lifting rod is rotatably arranged on the support frame through a rotating shaft. Then, through the transmission of the support shaft, the transmission shaft, the threaded rod and the threaded sleeve, and through the mutual cooperation of the main load-bearing seat and the secondary load-bearing seat, and the cooperation of the fork arm and the jacking seat, and at the same time, a buffer spring is arranged. Then, through the reverse thrust after the buffer spring is compressed, a buffer resistance is provided for the rotation of the base. When the worker falls, the base rotates under buffering to ensure the safe landing of the worker;

[0041] 3. The safety protection device described in this application is different from the existing protection device described in the above background technology. This device has a rotatable buffer structure. Thus, in the existing technology device, when a worker falls, the worker is suspended in the air by pulling the worker with the safety belt, which is likely to cause tissue contusion to the worker due to the safety belt strangling the worker. However, this device can make the falling worker land slowly and smoothly, and can effectively provide protection and ensure the safety of the human body at the same time. Brief Description of the Drawings

[0042] Figure 1 is a schematic structural diagram of the present invention.

[0043] Figure 2 is Figure 1 the front view of

[0044] Figure 3 is a schematic structural diagram of the variable speed transmission part in the present invention.

[0045] Figure 4 is a schematic structural diagram of the buffer stress part in the present invention.

[0046] Figure 5 It is a schematic structural diagram of the buffer counterweight in the present invention.

[0047] Figure 6 It is a schematic structural diagram of the transmission shaft, chain transmission mechanism, fork arm, and load-bearing plate in the present invention.

[0048] Figure 7 is Figure 6 An enlarged view of part A in

[0049] Figure 8 It is a schematic structural diagram of the support frame, load-bearing support, and storage rack in the present invention.

[0050] Explanation of reference numerals:

[0051] Base 1, screw lift rod 2, boom 3, safety hanging ring 4, trolley 5, support frame 6, counterweight water tank 7, variable speed transmission member 8, support shaft 8-1, transmission shaft 8-2, driving gear 8-3, threaded rod 8-4, driven gear 8-5, buffer stress member 9, load-bearing support 9-1, slide rail pair 9-2, chain transmission mechanism 9-3, main load-bearing seat 9-4, threaded sleeve 9-5, secondary load-bearing seat 9-6, buffer counterweight 10, storage rack 10-1, fork arm 10-2, guide rod 10-3, load-bearing plate 10-4, jacking seat 10-5, buffer spring 10-6, side edge support plate 11, support plate 12, positioning seat 13, positioning pin 14. Detailed implementation manners

[0052] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the drawings. Taking the preferred embodiments described as examples, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0053] Embodiment:

[0054] As Figure 1-8 shown, this embodiment includes a base 1, a screw lift rod 2, a boom 3, and a safety hanging ring 4. The screw lift rod 2 is arranged on the base 1, the boom 3 is fixedly arranged at the upper end of the screw lift rod 2, and there are several safety hanging rings 4 fixedly arranged on the boom 3. It further includes:

[0055] A trolley 5 and a support frame 6, where the support frame 6 is fixedly arranged on the trolley 5, and the base 1 is rotatably arranged on the support frame 6 through a rotating shaft;

[0056] Two positioning seats 13, which are symmetrically fixedly arranged on the lower side wall of the base 1 front and back;

[0057] A positioning pin 14, which is movably inserted into the positioning seat 13 and is movably inserted into the support frame 6;

[0058] A positioning pin 14 is provided on the base 1 for connection with the support frame 6. Further, when using this device, the positioning seat 13 and the support frame 6 are locked by the positioning pin 14 so that the base 1 cannot rotate, or the positioning pin 14 is pulled out so that the base 1 can rotate;

[0059] A counterweight water tank 7, and the counterweight water tank 7 is arranged on the trolley 5;

[0060] A side edge support plate 11, and the side edge support plate 11 is fixedly arranged on the trolley 5, and the counterweight water tank 7 is inserted into the side edge support plate 11;

[0061] The side edge support plate 11 is provided, and further, when the counterweight water tank 7 is placed on the trolley 5, it provides limit support for the counterweight water tank 7;

[0062] A variable speed transmission member 8, and the variable speed transmission member 8 is arranged on the support frame 6, and the variable speed transmission member 8 is in transmission connection with the rotating shaft of the base 1;

[0063] A buffer stress member 9, and the buffer stress member 9 is arranged on the trolley 5, and the buffer stress member 9 is in transmission connection with the variable speed transmission member 8;

[0064] A buffer counterweight member 10, and the buffer counterweight member 10 is arranged on the buffer stress member 9;

[0065] The variable speed transmission member 8 includes:

[0066] A support shaft 8-1, and the support shaft 8-1 is rotatably arranged on the support frame 6 through a bearing, and the support shaft 8-1 and the rotating shaft of the base 1 are in transmission connection through a variable speed gear set;

[0067] A transmission shaft 8-2, and the transmission shaft 8-2 is rotatably arranged on the support frame 6 through a bearing, and the transmission shaft 8-2 and the support shaft 8-1 are in transmission connection through a bevel gear set;

[0068] A driving gear 8-3, and the driving gear 8-3 is sleeved and fixed at the lower end of the transmission shaft 8-2;

[0069] There are two threaded rods 8-4, and the threaded rods 8-4 are symmetrically arranged front and back and are rotatably arranged on the support frame 6 through bearings. The front threaded rod 8-4 is provided with a right-handed thread, and the rear threaded rod 8-4 is provided with a left-handed thread;

[0070] A driven gear 8-5, and the driven gear 8-5 is sleeved and fixed at the lower end of the threaded rod 8-4, and the driven gear 8-5 is meshed with the driving gear 8-3;

[0071] The buffer stress member 9 includes:

[0072] Load-bearing bracket 9-1, the load-bearing bracket 9-1 is fixedly arranged on the trolley 5, and slide rail pairs 9-2 are arranged on both the left and right sides of the load-bearing bracket 9-1;

[0073] Chain drive mechanism 9-3, there are two chain drive mechanisms 9-3 which are symmetrically arranged front and back in the load-bearing bracket 9-1, and the sprockets of the chain drive mechanism 9-3 are rotatably arranged on the load-bearing bracket 9-1 through bearings;

[0074] Main load-bearing seat 9-4, the main load-bearing seat 9-4 is slidably arranged on the right slide rail pair 9-2 of the load-bearing bracket 9-1, and the main load-bearing seat 9-4 is fixedly arranged on the right chain of the chain drive mechanism 9-3;

[0075] Threaded sleeve 9-5, the threaded sleeve 9-5 is fixedly arranged on the main load-bearing seat 9-4, and the threaded sleeve 9-5 is screwed and sleeved on the threaded rod 8-4;

[0076] Auxiliary load-bearing seat 9-6, the auxiliary load-bearing seat 9-6 is slidably arranged on the left slide rail pair 9-2 of the load-bearing bracket 9-1, and the auxiliary load-bearing seat 9-6 is fixedly arranged on the left chain of the chain drive mechanism 9-3;

[0077] The buffer counterweight member 10 includes:

[0078] Storage rack 10-1, the storage rack 10-1 is fixedly arranged on the trolley 5, and the partition of the storage rack 10-1 is provided with an opening;

[0079] Fork arm 10-2, the fork arm 10-2 is fixedly arranged on the auxiliary load-bearing seat 9-6, and the fork arm 10-2 is located below the partition of the storage rack 10-1 and is inserted into the storage rack 10-1 from the right side of the storage rack 10-1;

[0080] Guide rods 10-3, there are several guide rods 10-3 which are fixedly arranged in an array in the storage rack 10-1;

[0081] Load-bearing plate 10-4, the load-bearing plate 10-4 is movably sleeved on the guide rods 10-3 above the partition of the storage rack;

[0082] Lifting seat 10-5, the lifting seat 10-5 is fixedly arranged on the fork arm 10-2, and the lifting seat 10-5 passes through the opening on the partition of the storage rack 10-1 and abuts against the lower surface of the load-bearing plate 10-4;

[0083] Support plate 12, the support plate 12 is fixedly arranged on the wall of the water tank facing the storage rack 10-1, and the support plate 12 is inserted into the storage rack 10-1, the support plate 12 is sleeved on the guide rods 10-3, and the support plate 12 is arranged above the load-bearing plate 10-4;

[0084] A buffer spring 10-6 is sleeved on a guide rod 10-3. The lower end of the buffer spring 10-6 is movably abutted against the upper surface of a load-bearing plate 10-4, and the upper end of the buffer spring 10-6 is abutted against the lower surface of a support plate 12.

[0085] When no water is added to the counterweight water tank 7 for counterweight, the buffer spring 10-6 abuts against both the load-bearing plate 10-4 and the support plate 12 at the same time, and then the load-bearing plate 10-4 is abutted against the partition of the storage rack 10-1, and the support plate 12 is abutted against the upper inner wall of the storage rack 10-1. After water is added to the counterweight water tank 7, the counterweight water tank 7 drives the support plate 12 to press downward, and then the support plate 12 presses the buffer spring 10-6 downward, so that the buffer spring 10-6 has initial compression energy storage. That is, when the jacking seat 10-5 pushes the load-bearing plate 10-4 upward to deform the buffer spring 10-6, the jacking seat 10-5 needs to provide a greater initial thrust.

[0086] After adopting the technical scheme disclosed by the present invention, the following can be achieved:

[0087] When using this device, move the trolley 5 and place it beside the unloading truck. Then raise the boom 3 through the screw lifter 2. Then the worker unloading the goods on the truck hangs the safety belt on the safety hanging ring 4. When the worker accidentally falls during high-altitude operation, the worker is pulled by the boom 3 and the safety belt worn by the worker to ensure the safety of the worker. And during this process, as the worker falls, the worker hangs on the boom 3 through the safety belt, and then drives the screw lifter 2 and the base 1 to rotate through the boom 3. Then, through the mutual cooperation of the speed-changing transmission member 8, the buffer force-receiving member 9, and the buffer counterweight member 10, the buffer during the lateral tilting rotation of the base 1 is realized, and the reaction thrust of the buffer increases as the rotation angle of the base 1 increases, so that the worker hanging on the boom 3 slowly descends, so as to buffer the downward movement of the worker when falling.

[0088] The base 1 rotates, and then drives the support shaft 8-1 to rotate through the speed-changing gear set. The support shaft 8-1 drives the transmission shaft 8-2 to rotate through the bevel gear set. The transmission shaft 8-2 drives the driving gear 8-3 to rotate. Then the driving gear 8-3 drives the driven gear 8-5 to rotate, that is, drives the front and rear two threaded rods 8-4 to rotate, and the front and rear two threaded rods 8-4 rotate at the same speed and in the same direction.

[0089] The threaded sleeve 9-5 is fixed on the main load-bearing seat 9-4, and the threaded sleeve 9-5 is screwed onto the threaded rod 8-4. The main load-bearing seat 9-4 is slidably mounted on the slide rail pair 9-2 on the load-bearing bracket 9-1 for guiding. Thus, when the threaded rod 8-4 rotates, the main load-bearing seat 9-4 is pushed to slide through the threaded sleeve 9-5. Since the threaded rod 8-4 at the front side has a right-handed thread and the threaded rod 8-4 at the rear side has a left-handed thread, as the threaded rod 8-4 rotates, one main load-bearing seat 9-4 moves upward and the other main load-bearing seat 9-4 moves downward. Moreover, as the base 1 rotates forward or backward, the rotation direction of the threaded rod 8-4 is different. At this time, it is certain that one main load-bearing seat 9-4 moves upward and the other main load-bearing seat 9-4 moves downward;

[0090] The main load-bearing seat 9-4 moves and drives the auxiliary load-bearing seat 9-6 to slide and guide on the slide rail pair 9-2 on the load-bearing bracket 9-1 through the chain drive mechanism 9-3. The auxiliary load-bearing seat 9-6 drives the fork arm 10-2 to move. Then, the main load-bearing seat 9-4 moves downward and drives the corresponding auxiliary load-bearing seat 9-6 connected to it to rise through the chain drive mechanism 9-3 connected to the main load-bearing seat 9-4. At this time, the other auxiliary load-bearing seat 9-6 moves downward. The auxiliary load-bearing seat 9-6 rises and pushes the fork arm 10-2 to rise. Then, the fork arm 10-2 drives the jacking seat 10-5 to rise. The jacking seat 10-5 passes through the opening on the partition of the storage rack 10-1 and abuts against the load-bearing plate 10-4 and pushes the load-bearing plate 10-4 upward. At this time, the load-bearing plate 10-4 cooperates with the support plate 12 to compress the buffer spring 10-6. Thus, a downward buffer thrust is applied to the load-bearing plate 10-4 through the buffer spring 10-6. Then, it is feedback to the base 1 through the jacking seat 10-5, fork arm 10-2, auxiliary load-bearing seat 9-6, main load-bearing seat 9-4, threaded rod 8-4, and transmission shaft 8-2. Moreover, when the base 1 rotates and tilts laterally, it is subject to a buffer resistance;

[0091] Moreover, when the fallen worker hangs on the boom 3 and drives the base 1 to rotate, and the worker descends slowly. As the rotation and tilt angle of the base 1 increases, the deformation stroke of the buffer spring 10-6 compressed by the jacking seat 10-5 increases, that is, the reaction force provided by the buffer spring 10-6 increases. This reaction force is feedback to the base 1, so as to buffer the rotation speed of the base 1, that is, buffer the falling speed of the worker;

[0092] When the device is in use, water is injected into the counterweight water tank 7 to increase the overall counterweight of the trolley 5, thereby balancing the load of the falling worker hanging on the boom 3 through this counterweight, and the weight of the counterweight is controlled by changing the water injection volume in the counterweight water tank 7. When water is injected into the counterweight water tank 7, the counterweight water tank 7 is guided by the side edge support plate 11. Thus, when the water injection in the counterweight water tank 7 increases, the counterweight water tank 7 descends. The counterweight water tank 7 abuts against the upper end of the buffer spring 10-6 through the support plate 12. Then, when the base 1 is in a vertical state, the position states of the two lifting seats 10-5 remain flush. At this time, the position of the load-bearing plate 10-4 is at the lowest point of the movement track of the load-bearing plate 10-4. At this time, as the counterweight water tank 7 descends and presses down the buffer spring 10-6 through the support plate 12, an initial deformation is applied to the buffer spring 10-6, so that an initial reaction force is applied by the buffer spring 10-6 when the load-bearing plate 10-4 moves upward.

[0093] Adopting the above technical solutions, the achievable technical advantages are as follows:

[0094] 1. The device is provided with a telescopic screw lifting rod 2, and based on this, a boom 3 and a safety hanging ring 4 are set up, so that the boom 3 can be erected for workers to hang the safety belt during use, and then when the worker accidentally falls, the safety belt can be pulled by the boom 3 to prevent the worker from falling to the ground;

[0095] 2. The base 1 for installing the screw lifting rod 2 is rotatably arranged on the support frame 6 through a rotating shaft. Then, after transmission through the support shaft 8-1, the transmission shaft 8-2, the threaded rod 8-4, and the threaded sleeve 9-5, through the mutual cooperation of the main load-bearing seat 9-4 and the secondary load-bearing seat 9-6, and the cooperation of the fork arm 10-2 and the lifting seat 10-5, and at the same time, a buffer spring 10-6 is set. Then, through the reverse thrust after the buffer spring 10-6 is compressed, a buffer resistance is provided for the rotation of the base 1. Thus, when the worker falls, the base 1 rotates under buffering to ensure the safe landing of the worker.

[0096] For those skilled in the art, they can modify the technical solutions recorded in the foregoing embodiments and make equivalent replacements for some technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A movable safety protection device, which comprises a base (1), a screw rod lifting rod (2), a boom (3), and safety hanging rings (4). The screw rod lifting rod (2) is arranged on the base (1), the boom (3) is fixedly arranged at the upper end of the screw rod lifting rod (2), and there are several safety hanging rings (4) fixedly arranged on the boom (3); characterized in that, It also includes: A trolley (5) and a support frame (6), wherein the support frame (6) is fixedly arranged on the trolley (5), and the base (1) is rotatably arranged on the support frame (6) through a rotating shaft; A counterweight water tank (7), and the counterweight water tank (7) is arranged on the trolley (5); A variable speed transmission member (8), and the variable speed transmission member (8) is arranged on the support frame (6), and the variable speed transmission member (8) is in transmission connection with the rotating shaft of the base (1); A buffer stress member (9), and the buffer stress member (9) is arranged on the trolley (5), and the buffer stress member (9) is in transmission connection with the variable speed transmission member (8); A buffer counterweight member (10), and the buffer counterweight member (10) is arranged on the buffer stress member (9); The variable speed transmission member (8) includes: A support shaft (8-1), and the support shaft (8-1) is rotatably arranged on the support frame (6) through a bearing, and a variable speed gear set is arranged for transmission between the support shaft (8-1) and the rotating shaft of the base (1); A transmission shaft (8-2), and the transmission shaft (8-2) is rotatably arranged on the support frame (6) through a bearing, and a bevel gear set is arranged for transmission between the transmission shaft (8-2) and the support shaft (8-1); A driving gear (8-3), and the driving gear (8-3) is sleeved and fixed at the lower end of the transmission shaft (8-2); Two threaded rods (8-4), and the threaded rods (8-4) are symmetrically arranged front and back and rotatably arranged on the support frame (6) through bearings. The front threaded rod (8-4) is provided with a right-handed thread, and the rear threaded rod (8-4) is provided with a left-handed thread; A driven gear (8-5), and the driven gear (8-5) is sleeved and fixed at the lower end of the threaded rod (8-4), and the driven gear (8-5) is meshed with the driving gear (8-3); The buffer stress member (9) includes: A load-bearing bracket (9-1), and the load-bearing bracket (9-1) is fixedly arranged on the trolley (5), and slide rail pairs (9-2) are arranged on both the left and right sides of the load-bearing bracket (9-1); Two chain transmission mechanisms (9-3), and the chain transmission mechanisms (9-3) are symmetrically arranged front and back in the load-bearing bracket (9-1), and the sprockets of the chain transmission mechanisms (9-3) are rotatably arranged on the load-bearing bracket (9-1) through bearings; A main load-bearing seat (9-4), and the main load-bearing seat (9-4) is slidably arranged on the right slide rail pair (9-2) of the load-bearing bracket (9-1), and the main load-bearing seat (9-4) is fixedly arranged on the right chain of the chain transmission mechanism (9-3); A threaded sleeve (9-5), and the threaded sleeve (9-5) is fixedly arranged on the main load-bearing seat (9-4), and the threaded sleeve (9-5) is threadedly sleeved on the threaded rod (8-4); A secondary load-bearing seat (9-6), and the secondary load-bearing seat (9-6) is slidably arranged on the left slide rail pair (9-2) of the load-bearing bracket (9-1), and the secondary load-bearing seat (9-6) is fixedly arranged on the left chain of the chain transmission mechanism (9-3).

2. The movable safety protection device according to claim 1, characterized in that: The buffer counterweight member (10) includes: Storage rack (10-1), the storage rack (10-1) is fixedly arranged on the trolley (5), and the partition board of the storage rack (10-1) is provided with an opening; Fork arm (10-2), the fork arm (10-2) is fixedly arranged on the auxiliary load-bearing seat (9-6), and the fork arm (10-2) is located below the partition board of the storage rack (10-1) and is inserted into the storage rack (10-1) from the right side of the storage rack (10-1); Guide rod (10-3), several guide rods (10-3) are fixedly arranged in the storage rack (10-1) in an array; Load-bearing plate (10-4), the load-bearing plate (10-4) is movably sleeved on the guide rod (10-3) above the partition board of the storage rack (10-1); Lifting seat (10-5), the lifting seat (10-5) is fixedly arranged on the fork arm (10-2), and the lifting seat (10-5) passes through the opening on the partition board of the storage rack (10-1) and abuts against the lower surface of the load-bearing plate (10-4); Buffer spring (10-6), the buffer spring (10-6) is sleeved on the guide rod (10-3), and the lower end of the buffer spring (10-6) is movably abutted against the upper surface of the load-bearing plate (10-4).

3. The movable safety protection device according to claim 2, wherein: A side edge support plate (11) is fixedly arranged on the trolley (5), and the counterweight water tank (7) is inserted into the side edge support plate (11).

4. The movable safety protection device according to claim 3, characterized in that: A support plate (12) is fixedly arranged on the wall of the counterweight water tank (7) facing the storage rack (10-1) side, and the support plate (12) is inserted into the storage rack (10-1) from the left side of the storage rack (10-1) above the partition board of the storage rack (10-1), the support plate (12) is movably sleeved on the guide rod (10-3), and the upper end of the buffer spring (10-6) is movably abutted against the lower surface of the support plate (12).

5. The movable safety protection device according to claim 4, characterized in that: A positioning seat (13) is fixedly arranged on the lower side wall of the base (1) far from the rotation axis of the base (1) and the support frame (6), a positioning pin (14) is movably inserted through the positioning seat (13), and the positioning pin (14) is inserted into the support frame (6) after passing through the positioning seat (13).

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