A fully mechanical speed-changing centrifugal locking assembly

Abstract

The invention discloses a fully mechanical variable speed centrifugal locking assembly, which is characterized in that it includes a rotating member, a transmission speed change member, a turntable, a centrifugal member and a brake component, wherein the rotating member is rotatably connected to the mounting frame, and when the mounting frame moves on the guide rail, the rotating member acts on the guide rail to rotate, and the turntable is rotatably connected to the mounting frame, and the rotating member drives the turntable to rotate through the transmission speed change member, and the centrifugal member is slidably arranged on the turntable, and when the rotation speed of the turntable exceeds the set value, the centrifugal member can slide outward under the action of centrifugal force, thereby contacting the brake component to activate the brake component, and the brake component acts on the guide rail to stop the movement of the mounting frame. It has the advantages of simple and reasonable structure, high reliability and long service life.

Description

Technical Field

[0001] The invention relates to tool equipment, in particular to a lifting device. Background Art

[0002] Lifting equipment is a device that enables people or objects to move back and forth between low and high places. The important indicators of lifting equipment are: 1. Safety; 2. Disassembly and assembly; 3. Crisis relief and escape functions.

[0003] Common lifting mechanisms at present include civil elevators and building elevators. Civil elevators have high requirements for supporting facilities and are generally not suitable for outdoor operations. They use cables for lifting, and a cable breakage can easily cause a fall. In addition, power outages during operation are not conducive to escape. Building elevators are suitable for outdoor use, but they require the erection of steel pipe brackets, which are relatively complex to construct and have high costs. At the same time, building elevators use cables for lifting, and a cable breakage can easily cause a fall, which is not very safe. In addition, if a power outage occurs and the elevator is at a high altitude, it is not conducive to rescue and does not have crisis relief and escape functions.

[0004] Since outdoor work scenarios are different, for example, in the field of power construction, it is necessary to work on high electric towers, which requires the use of lifting and climbing equipment. Due to the limitations of the construction site, the use of existing building elevators is very inconvenient; such as at a fire scene, the normal passage is blocked and there is no effective lifting equipment to assist in rescue work.

[0005] The applicant has designed a variety of lifting devices for this purpose, but the previous designs have certain deficiencies in safety and anti-fall performance, intelligent control functions, etc. Therefore, it is an urgent problem for those skilled in the art to improve the existing lifting equipment to overcome the above problems. Summary of the invention

[0006] The object of the present invention is to provide a lifting device with a fully mechanical variable speed centrifugal locking assembly, which has high safety, wide application range, simple and reasonable structure and high reliability.

[0007] Another object of the present invention is to provide a fully mechanical speed-changing centrifugal locking assembly with a simple and reasonable structure, high reliability and long service life.

[0008] Another object of the present invention is to provide a descent warning component which has a sound reminder function, enables an operator to intuitively feel the descent speed, has a simple and reasonable structure, and is reliable to use.

[0009] In order to achieve the above purpose, the technical solution adopted by the present invention is: a lifting device with a fully mechanical variable speed centrifugal locking assembly, comprising a guide rail, a mounting frame, a carrier, a power assembly and a lifting assembly, wherein the mounting frame is movably arranged on the guide rail, the carrier, the power assembly and the lifting assembly are all arranged on the mounting frame, the power assembly drives the lifting assembly to operate, and the lifting assembly acts on the guide rail to drive the mounting frame to move along the guide rail; the characteristics are:

[0010] It also includes a fully mechanical speed-changing centrifugal locking assembly, which includes a rotating part, a transmission speed-changing part, a turntable, a centrifugal part and a brake component. The rotating part is rotatably connected to the mounting frame. When the mounting frame moves on the guide rail, the rotating part acts on the guide rail to rotate. The turntable is rotatably connected to the mounting frame. The rotating part drives the turntable to rotate through the transmission speed-changing part. The centrifugal part is slidably arranged on the turntable. When the rotation speed of the turntable exceeds the set value, the centrifugal part can slide outward under the action of centrifugal force, thereby contacting the brake component to activate the brake component. The brake component acts on the guide rail to stop the movement of the mounting frame.

[0011] Preferably, the brake component comprises a lock hook, a clamping column, a brake slider and a pulling spring, one end of the lock hook is rotatably connected to the brake slider, the clamping column is fixedly arranged on the mounting frame, the middle section of the lock hook can be buckled on the clamping column, the other end of the lock hook can contact the centrifugal member, the brake slider is slidably arranged on the mounting frame, and the pulling spring is arranged between the brake slider and the mounting frame; when the lifting device is operating normally, the rotating disk has a low rotation speed, at which time the centrifugal member rotates with the rotating disk and does not contact the lock hook, the lock hook is locked on the clamping column, the brake slider does not contact the guide rail, and the pulling spring is in a stretched state; when the lifting device is descending at a high speed, the rotating disk has a high rotation speed, at which time the centrifugal member rotates with the rotating disk and slides outward under the action of centrifugal force until it contacts the lock hook, pushes the lock hook to rotate, and causes the lock hook to detach from the clamping column, and the pulling spring contracts rapidly, pulling the brake slider to slide rapidly until it contacts the guide rail, and under the interaction between the brake slider and the guide rail, the mounting frame stops moving. The brake slider is equivalent to the brake pad of a car and can firmly fix the mounting frame on the guide rail.

[0012] As an improvement, the lock hook and the clamping column are both conductors, and the lock hook and the clamping column are electrically connected with wires to form a switch structure, and the switch structure is connected in series with the power component. When the lock hook is detached from the clamping column, the power component is disconnected. This structure can ensure that when the mounting frame stops moving, the power component can stop working in time to avoid damage to the power component, lifting component and guide rail.

[0013] Preferably, the mounting frame is provided with an inclined slide groove, the brake slider is slidably arranged in the inclined slide groove, the contact surface of the brake slider that can contact the guide rail is always parallel to the guide rail, and when the brake slider moves from one end of the inclined slide groove to the other end, the brake slider gradually approaches or moves away from the guide rail; the contact surface of the brake slider is provided with a latching tooth. The advantage of adopting this structure is that when the entire device slides downward, the brake slider will have a tendency to move upward under the action of friction when it contacts the guide rail, that is, it will have a tendency to continue to approach the guide rail, so that the braking effect of the brake slider is better; in addition, the function of the latching tooth is to "grasp" the guide rail more firmly.

[0014] As an improvement, a reset spring is also provided between the turntable and the centrifugal member; a contact block is threadedly connected to the other end of the lock hook, and the contact block is in contact with the centrifugal member. By rotating the contact block on the lock hook, the distance between the contact block and the centrifugal member can be adjusted. The setting of the reset spring can make the centrifugal member have a tendency to slide inward, playing a reset role; it is also worth mentioning that the centrifugal force acting on the centrifugal member needs to overcome the gravity of the centrifugal member, the friction between the centrifugal member and the turntable, and the elastic force of the reset spring to make the centrifugal member slide outward. The setting of the contact block is used to adjust the distance between the contact block and the centrifugal member, that is, to adjust the rotation speed of the turntable when the centrifugal member can act on the brake component, that is, to set the lowering safety speed.

[0015] As a further improvement, a first one-way gear is further provided between the rotating member and the transmission speed-changing member; when the lifting device descends, the rotating member drives the transmission speed-changing member to move through the first one-way gear, and when the lifting device ascends, the transmission speed-changing member is inactive. This can avoid the ineffective rotation of the transmission speed-changing member and increase the service life of the entire device; it can also avoid the centrifugal member accidentally contacting the lock hook when the lifting device ascends too quickly.

[0016] As an optional solution, the transmission speed change member is a synchronous belt body wheel structure or a reduction box structure or a gear set structure. One function of the transmission speed change member is transmission, and the other function is speed change. By setting the transmission ratio, the rotation speed of the turntable can be adjusted, which is also a way to set the descent safety speed. Generally, the rotation of the turntable needs to be greater than the rotation of the rotating part to ensure that there is enough centrifugal force to make the centrifugal part move. Therefore, the reduction box structure here is actually a reduction box inverted structure, which plays an acceleration role.

[0017] As a further optimization, the lifting device also includes a descent warning component, which includes a power supply, a second one-way gear, a contact cam, a travel switch and a buzzer. The second one-way gear is arranged on the rotating member. When the lifting device descends, the rotating member drives the second one-way gear to rotate. When the lifting device rises, the second one-way gear does not rotate. The contact cam is fixedly arranged on the second one-way gear and rotates synchronously. The travel switch is fixedly arranged on the mounting frame. The power supply, the travel switch and the buzzer are connected in series, and the power supply provides power to the buzzer. When the contact cam rotates, the protrusion of the contact cam intermittently contacts the travel switch, and the power supply and the buzzer can be intermittently connected, so that the buzzer emits intermittent buzzing sounds. Among them, the contact cam and the travel switch are in point contact. The advantage of point contact is that when the lifting device stops, the contact cam and the travel switch can be basically avoided from contacting, that is, the continuous buzzing of the buzzer is avoided. In addition, the buzzer can emit voice reminders, such as "Please pay attention to descent", "Be careful", "Please leave below", etc.

[0018] Preferably, a gear groove is provided on the guide rail, and the lifting assembly is a gear structure that cooperates with the gear groove. The lifting assembly includes a main gear and a sub-gear, and the main gear and the sub-gear are concentrically fixedly arranged, and the contact surfaces of the main gear and the guide rail are higher than the sub-gear; there are two sub-gears, which are arranged on both sides of the main gear, the main gear is made of plastic material, and the sub-gear is made of metal material; the main gear and the sub-gear are concentrically fixed by a transmission shaft, a fixing bolt and a nut seat; a large shaft hole is opened at the center of the main gear, and a connected outer semicircular hole is opened on the circumference of the large shaft hole, and the center of the outer semicircular hole is located at the large shaft hole. The side line of the large shaft hole; a small shaft hole is provided at the center of the secondary gear, and a non-connected circular hole is provided on the outside of the small shaft hole, and the distance from the circular hole to the center of the small shaft hole is equal to the radius of the large shaft hole; the transmission shaft is provided with a large shaft section with the same diameter as the large shaft hole, and a small shaft section with the same diameter as the small shaft hole, and an inner semicircular hole is provided on the circumference of the large shaft section, and the center of the inner semicircular hole is located on the side line of the large shaft section, the main gear is installed on the large shaft section, and the secondary gear is installed on the small shaft section; the fixing bolt can pass through the outer semicircular hole, the inner semicircular hole and the circular hole respectively for circumferential fixation, and the nut seat can be fixed on both ends of the fixing bolt for axial fixation. Under normal circumstances, the main gear contacts the guide rail for travel. When the main gear is suddenly damaged, the secondary gear starts to contact the guide rail for travel. The secondary gear plays a backup role, further improving the safety of the entire device. The main reason why the main gear is made of plastic is that the plastic gear moves on the guide rail with little noise, while the metal gear moves on the guide rail with a lot of noise. However, the strength of plastic is not as good as that of metal and may break. Therefore, after comprehensive consideration, this solution uses a plastic main gear and a metal sub-gear to ensure safety while reducing the noise of the device. It is an optimal solution. Further preferred, the main gear can be made of nylon and the sub-gear can be made of stainless steel. In addition, the main gear is made of plastic, and the precision of hole processing using a lathe is not high, while the lifting component requires very high assembly precision. Therefore, a structure in which the main gear large shaft hole and the outer semicircular hole are connected is designed. This structure can be processed by wire cutting and has very high processing precision, which can meet the assembly requirements of the lifting component.

[0019] As an improvement, an installation rod may be fixedly provided at the upper end of the installation frame, and the length of the installation rod is greater than the length of a section of the guide rail. After the first section of the guide rail is installed, the second section of the guide rail can be hung on the installation rod, and the second section of the guide rail is transported to the top of the first section of the guide rail by the lifting device to complete the installation of the second section of the guide rail. The lifting device then descends to transport the third section of the guide rail, and the process is repeated in sequence until the installation of the entire guide rail is completed. This guide rail installation method is easy to assemble, occupies a small area during assembly, and has high assembly efficiency.

[0020] Compared with the prior art, the advantages of the present invention are: 1. The setting of the full mechanical variable speed centrifugal locking assembly can provide real-time feedback on the descent speed of the entire lifting device. When the lifting assembly is damaged, the guide rail is deformed, the power assembly is out of control, and other accidents occur, causing the entire device to descend at a high speed, the full mechanical variable speed centrifugal locking assembly will immediately react and lock the entire device to prevent the device from causing injuries to personnel and damage to items due to high-speed falling. Moreover, the full mechanical variable speed centrifugal locking assembly is a full mechanical structure, which is more reliable than electronic equipment and can adapt to various harsh environments, such as high cold, high pressure, low pressure, high temperature, high humidity, etc., to meet various use requirements of power equipment. 2. The setting of the descent warning assembly can remind the operator and the personnel below to pay attention to safety when the lifting device descends; it can also detect the interval buzzing frequency of the buzzer, and intuitively feel the descent speed through hearing, that is, the denser the buzzing sound, the faster the descent speed, and vice versa, which plays a good reminder and warning role; compared with electronic equipment, it is also more reliable, more applicable, and has low cost and simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of a three-dimensional structure according to a preferred embodiment of the present invention;

[0022] Figure 2 is a schematic diagram of a partial explosion state according to a preferred embodiment of the present invention;

[0023] Figure 3 is a schematic diagram of the assembly relationship between the lifting assembly and the guide rail according to a preferred embodiment of the present invention;

[0024] Figure 4 is a schematic diagram of an explosion state of a lifting assembly according to a preferred embodiment of the present invention;

[0025] Figure 5 is an axial view of a transmission shaft according to a preferred embodiment of the present invention;

[0026] Figure 6 is an axial view of a main gear according to a preferred embodiment of the present invention;

[0027] Figure 7 is an axial view of a pinion gear according to a preferred embodiment of the present invention;

[0028] Figure 8 It is a schematic diagram of the planar structure of a fully mechanical variable speed centrifugal locking assembly according to a preferred embodiment of the present invention;

[0029] Fig. 9 It is a schematic diagram of the three-dimensional structure of a fully mechanical speed-changing centrifugal locking assembly according to a preferred embodiment of the present invention;

[0030] Fig.10 is a schematic diagram of the three-dimensional structure of a descent warning component according to a preferred embodiment of the present invention;

[0031] Fig.11 is a schematic diagram of the planar structure of a descent warning component according to a preferred embodiment of the present invention;

[0032] Fig.12 It is a structural schematic diagram of a transmission speed change component in a preferred embodiment of the present invention when it is a reduction box structure;

[0033] Fig.13 It is a structural schematic diagram of a transmission speed change component in a preferred embodiment of the present invention when the transmission speed change component is a gear set structure;

[0034] Fig.14 It is a schematic structural diagram of a brake slider according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0035] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0036] like Figures 1 to 14 As shown, embodiment 1 of the present invention includes a guide rail 1, a mounting frame 2, a carrier 3, a power assembly 4, a lifting assembly 5 and a fully mechanical variable speed centrifugal locking assembly 6. The mounting frame 2 is movably arranged on the guide rail 1, and the carrier 3, the power assembly 4, the lifting assembly 5 and the fully mechanical variable speed centrifugal locking assembly 6 are all arranged on the mounting frame 2. The power assembly 4 drives the lifting assembly 5 to operate, and the lifting assembly 5 acts on the guide rail 1 to drive the mounting frame 2 to move along the guide rail.

[0037] A key point of the present embodiment is the setting of the full-mechanical speed-changing centrifugal locking assembly 6, specifically: the full-mechanical speed-changing centrifugal locking assembly 6 includes a rotating member 61, a transmission speed-changing member 62 (62', 62"), a turntable 63, a centrifugal member 64 and a brake component. The rotating member 61 is rotatably connected to the mounting frame 2. When the mounting frame 2 moves on the guide rail 1, the rotating member 61 acts on the guide rail 1 to rotate, and the turntable 63 is rotatably connected to the mounting frame 2. The rotating member 61 drives the turntable 63 to rotate through the transmission speed-changing member 62 (62', 62"), and the centrifugal member 64 is slidably set on the turntable 63. When the rotation speed of the turntable 63 exceeds the set value, the centrifugal member 64 can slide outward under the action of centrifugal force, thereby contacting the brake component to activate the brake component, and the brake component acts on the guide rail 1 to stop the movement of the mounting frame 2.

[0038] The brake components in this embodiment include a lock hook 66, a clamping column 67, a brake slider 68 and a pulling spring 69. One end of the lock hook 66 is rotatably connected to the brake slider 68, the clamping column 67 is fixedly set on the mounting frame 2, the middle section of the lock hook 66 can be buckled on the clamping column 67, the other end of the lock hook 66 can contact the centrifugal member 64, the brake slider 68 is slidably set on the mounting frame 2, and the pulling spring 69 is set between the brake slider 68 and the mounting frame 2; when the lifting device is operating normally, the speed of the turntable 63 is relatively low. At this time, the centrifugal member 64 rotates with the turntable 63 and does not contact the lock hook 66. The lock hook 66 is buckled on the clamping column 67, the brake slider 68 does not contact the guide rail, and the pulling spring 69 is in a stretched state. Its working principle is: when the lifting device descends at high speed, the rotation speed of the turntable 63 is relatively high. At this time, the centrifugal member 64 rotates with the turntable 63 and slides outward under the action of centrifugal force until it contacts the lock hook 66, pushing the lock hook 66 to rotate, so that the lock hook 66 is separated from the clamping column 67, pulling the spring 69 to shrink quickly, pulling the brake slider 68 to slide quickly until it contacts the guide rail 1, and under the interaction between the brake slider 68 and the guide rail 1, the mounting frame 2 stops moving.

[0039] In addition, in order to increase safety, the lock hook 66 and the card column 67 are both conductors, and the lock hook 66 and the card column 67 are electrically connected with a wire 60 to form a switch structure, and the switch structure and the power component 4 are connected in series. When the lock hook 66 is detached from the card column 67, the power component 4 is disconnected.

[0040] Moreover, the mounting frame 2 is provided with an inclined slide groove 21, and the brake slider 68 is slidably arranged in the inclined slide groove 21. The contact surface of the brake slider 68 that can contact the guide rail 1 is always parallel to the guide rail 1. When the brake slider 68 moves from one end of the inclined slide groove 21 to the other end, the brake slider 68 gradually approaches or moves away from the guide rail 1. In addition, a latching tooth 681 is arranged on the contact surface of the brake slider 68. A return spring 65 is also arranged between the rotating disk 63 and the centrifugal member 64; the other end of the lock hook 66 is threadedly connected with a contact block 661, and the contact block 661 contacts the centrifugal member 64. By rotating the contact block 661 on the lock hook 66, the distance between the contact block 661 and the centrifugal member 64 can be adjusted. A first one-way gear 621 is also arranged between the rotating member 61 and the transmission speed change member 62; when the lifting device descends, the rotating member 61 drives the transmission speed change member 62 to move through the first one-way gear 621, and when the lifting device rises, the transmission speed change member 62 is inactive.

[0041] In this embodiment, the transmission speed change member 62 (62', 62") can be a synchronous belt wheel structure 62 (such as Figure 1 , 2 , 8, 9, 10) or a reduction box structure 62' (as shown Fig.12 as shown) or gear set structure 62" (as shown Fig.13 shown).

[0042] Another key point of this embodiment is the setting of the descent warning component 7. Specifically, the descent warning component 7 includes a power supply 71, a second one-way gear 72, a contact cam 73, a travel switch 74 and a buzzer 75. The second one-way gear 72 is set on the rotating member 61. When the lifting device descends, the rotating member 61 drives the second one-way gear 72 to rotate. When the lifting device rises, the second one-way gear 72 does not rotate. The contact cam 73 is fixedly set on the second one-way gear 72 and rotates synchronously. The travel switch 74 is fixedly set on the mounting frame 2. The power supply 71, the travel switch 74 and the buzzer 75 are connected in series, and the power supply 71 provides power to the buzzer 75. Its working principle is: when the contact cam 73 rotates, the protrusion of the contact cam 73 intermittently contacts the travel switch 74, and the power supply 71 and the buzzer 75 can be intermittently connected, so that the buzzer 75 emits intermittent buzzing sounds. Among them, the contact cam 73 and the travel switch 74 are point-to-point contact. As another optional setting, the buzzer 75 can emit voice reminders, such as "Please pay attention when descending", "Be careful", "Please leave if you are below", etc.

[0043] Another key point of this embodiment is the arrangement of the lifting assembly 5. Specifically, the guide rail 1 is provided with a gear groove 11, and the lifting assembly 5 is a gear structure matched with the gear groove 11. The lifting assembly 5 includes a main gear 51 and a sub-gear 52. The main gear 51 and the sub-gear 52 are fixedly arranged concentrically, and the contact surface between the main gear 51 and the guide rail 1 is higher than the sub-gear 52. There are two sub-gears 52, which are arranged on both sides of the main gear 51. The main gear 51 is made of plastic material, and the sub-gear 52 is made of metal material. The main gear 51 and the sub-gear 52 are fixed concentrically by the transmission shaft 53, the fixing bolts 54 and the nut seat 55; the main gear 51 is provided with a large shaft hole 511 at the center, and the outer semicircular holes 512 connected to each other are provided on the periphery of the large shaft hole 511, and the center of the outer semicircular holes 512 is located on the edge line of the large shaft hole 511; the sub-gear 52 is provided with a small shaft hole 521 at the center, and a non-connected circular hole 522 is provided on the outer side of the small shaft hole 521, and the distance from the circular hole 522 to the center of the small shaft hole 521 is equal to the radius of the large shaft hole 511; the transmission shaft 53 is provided with a A large shaft section 531 having the same diameter as the large shaft hole 511 and a small shaft section 532 having the same diameter as the small shaft hole 521 are provided. An inner semicircular hole 533 is provided on the circumference of the large shaft section 531. The center of the inner semicircular hole 533 is located on the edge line of the large shaft section 531. The main gear 51 is mounted on the large shaft section 531, and the sub-gear 52 is mounted on the small shaft section 532. The fixing bolts 54 can respectively pass through the outer semicircular hole 512, the inner semicircular hole 533 and the circular hole 522 for circumferential fixation, and the nut seats 55 can be fixed on both ends of the fixing bolts 54 for axial fixation.

[0044] As an extension of this embodiment, a mounting rod 8 may be fixedly provided on the upper end of the mounting frame 2. The length of the mounting rod 8 is greater than the length of a section of the guide rail 1. The mounting rod 8 is used to sequentially mount the guide rail 1.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A fully mechanical speed-changing centrifugal locking assembly, characterized in that: It includes a rotating member, a transmission speed-changing member, a turntable, a centrifugal member and a brake member, wherein the rotating member is rotatably connected to the mounting frame, and when the mounting frame moves on the guide rail, the rotating member acts on the guide rail to rotate, and the turntable is rotatably connected to the mounting frame, and the rotating member drives the turntable to rotate through the transmission speed-changing member, and the centrifugal member is slidably arranged on the turntable, and when the rotation speed of the turntable exceeds the set value, the centrifugal member can slide outward under the action of centrifugal force, thereby contacting the brake member to activate the brake member, and the brake member acts on the guide rail to stop the movement of the mounting frame; a gear groove is arranged on the guide rail; The brake component comprises a lock hook, a clamping column, a brake slider and a pulling spring, one end of the lock hook is rotatably connected to the brake slider, the clamping column is fixedly arranged on the mounting frame, the middle section of the lock hook can be buckled on the clamping column, the other end of the lock hook can contact the centrifugal member, the brake slider is slidably arranged on the mounting frame, and the pulling spring is arranged between the brake slider and the mounting frame; when the lifting device is operating normally, the rotating disk has a low rotation speed, at which time the centrifugal member rotates with the rotating disk and does not contact the lock hook, the lock hook is locked on the clamping column, the brake slider does not contact the guide rail, and the pulling spring is in a stretched state; when the lifting device is descending at a high speed, the rotating disk has a high rotation speed, at which time the centrifugal member rotates with the rotating disk and slides outward under the action of centrifugal force until it contacts the lock hook, pushes the lock hook to rotate, and causes the lock hook to detach from the clamping column, the pulling spring contracts rapidly, pulls the brake slider to slide rapidly until it contacts the guide rail, and under the interaction between the brake slider and the guide rail, the mounting frame stops moving; The lock hook and the clamping column are both conductors, and the lock hook and the clamping column are electrically connected with wires to form a switch structure, and the switch structure and the power component are connected in series. When the lock hook is detached from the clamping column, the power component is disconnected.

2. A fully mechanical speed-changing centrifugal locking assembly according to claim 1, characterized in that: The mounting frame is provided with an inclined slide groove, and the brake slider is slidably arranged in the inclined slide groove. The contact surface of the brake slider that can contact the guide rail is always parallel to the guide rail. When the brake slider moves from one end of the inclined slide groove to the other end, the brake slider gradually approaches or moves away from the guide rail; the contact surface of the brake slider is provided with a latching tooth.

3. A fully mechanical speed-changing centrifugal locking assembly according to claim 2, characterized in that: A return spring is also arranged between the turntable and the centrifugal member; a contact block is threadedly connected to the other end of the lock hook, and the contact block is in contact with the centrifugal member. The distance between the contact block and the centrifugal member can be adjusted by rotating the contact block on the lock hook.

4. A fully mechanical speed-changing centrifugal locking assembly according to claim 3, characterized in that: A first one-way gear is also provided between the rotating member and the transmission speed-changing member; when the lifting device descends, the rotating member drives the transmission speed-changing member to move through the first one-way gear, and when the lifting device ascends, the transmission speed-changing member is inactive.

5. A fully mechanical speed-changing centrifugal locking assembly according to claim 4, characterized in that: The transmission speed-changing member is a synchronous belt wheel structure, a reduction box structure or a gear set structure.

Images