Anti-falling device for climbing tower crane
By designing a fall-proof device for tower crane climbing, the automatic braking is achieved by using the meshing mechanism between the snap teeth and the tooth rails, the problem of easy failure of the existing fall-proof device is solved and the safety is improved.
Patent Information
- Application Number
- CN202421444377.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-21
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-06-21
AI Technical Summary
The existing tower crane climbing and anti-falling device is prone to failure during long-term use and cannot effectively prevent fall accidents.
A fall-proof device including a guide groove, a gear rail, a brake assembly and a traction assembly is designed. The brake assembly meshs with the gear rails to achieve automatic braking. When a fall occurs, the seat belt tightens the gears to closely contact the gear rails to ensure the braking effect.
The device can quickly achieve automatic braking when a fall occurs, reducing the probability of failure and improving the safety of climbing tower cranes.
Smart Images
Figure CN222757835U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of tower crane safety protection, in particular to an anti-falling device for climbing tower cranes. Background Art
[0002] Tower cranes are key mechanical equipment in various engineering fields. During construction, tower crane drivers often need to climb from the ground to the tower crane cab, or climb down from the cab to the ground. The tower crane cab is located at a high position. Without proper safety protection measures, mistakes during the climbing process may lead to high-altitude falls.
[0003] In the prior art, climbers wear safety belts and fall arresters when climbing tower cranes, but the following problems still exist: the extended length of the steel wire rope of the fall arrester may not be enough to cover the entire climbing process, affecting the convenience of use; when the fall arrester fails during the climbing process and needs to be adjusted, for example, the steel wire rope of the fall arrester cannot continue to extend or retract, the climber has difficulty in contacting the fall arrester and cannot adjust it in time, so that subsequent climbers cannot be effectively protected when climbing up and down, causing inconvenience and safety hazards to the climbers; when the climber descends to the ground, the steel wire rope hook of the fall arrester needs to be fixed in a position close to the ground, but the steel wire rope of the fall arrester may accidentally retract, resulting in the inability to use the fall arrester during the next climb; the steel wire rope hook of the fall arrester is fixed to the ground for a long time, causing the fall arrester to be in a taut state for a long time, and the fall arrester is prone to failure, and cannot effectively play a fall prevention role in an emergency. Utility Model Content
[0004] The utility model aims to overcome the shortcomings of the prior art that the fall arrester is in a taut state for a long time during use when climbing a tower crane, is prone to failure, and may not be able to play the fall prevention role, and provides a fall prevention device for climbing a tower crane.
[0005] The utility model provides a falling prevention device for climbing a tower crane, comprising:
[0006] A guide groove, the guide groove is arranged vertically along the tower crane, and the guide groove is provided with an opening area;
[0007] A rack, the rack is connected to the tower crane and is located inside the guide groove;
[0008] A brake assembly, wherein the brake assembly is provided with a connecting rod, the connecting rod is rotatably connected to the brake assembly via a rotating shaft, a first end of the connecting rod is connected to a latching tooth, in an initial state, the latching tooth can be away from the rack under the action of gravity, and rotating the connecting rod can drive the latching tooth to approach the rack until they are engaged with each other, the second end of the connecting rod passes through the opening area of the guide slot and is located outside the guide slot, and the second end of the connecting rod is used to connect the safety belt;
[0009] A traction assembly is connected to the brake assembly, and the traction assembly can move along the rack and thus drive the brake assembly to move.
[0010] The utility model provides an anti-fall device for climbing tower cranes, wherein a guide groove and a rack can limit the brake assembly and the traction assembly to move only longitudinally along the guide groove. In the initial state, the safety belt connected to the second end of the connecting rod is in an untensioned state, and the latch connected to the first end of the connecting rod can maintain the tendency of the connecting rod to rotate counterclockwise around the rotating axis due to its own gravity, thereby maintaining the latch not in contact with the rack, ensuring that the brake assembly is in an unbraked state, and the anti-fall device can move up and down along the guide groove. When a fall occurs, the safety belt will apply a vertical pulling force to the second end of the connecting rod, and this vertical pulling force can generate a force arm that causes the connecting rod to rotate clockwise around the rotating axis. When the connecting rod rotates clockwise, it will drive the latch to translate upward and approach the rack, and at the same time, because the latch can engage with the rack, relative displacement cannot occur between the latch and the rack, thereby achieving a braking effect. The braking principle is simple, automatic braking can be completed when a fall occurs, and the probability of failure in long-term use is low, thereby improving the safety of the anti-fall device.
[0011] Preferably, the brake assembly is provided with an elastic component, which can be used to drive the latching teeth to reset. When no braking occurs, the elastic component can keep the latching teeth and the rack apart, avoiding unnecessary braking and affecting the normal use of the anti-fall device.
[0012] Preferably, the connecting rod and the latching tooth are connected by a four-bar linkage. The four-bar linkage is a parallelogram movable mechanism, and the latching tooth and the braking device are respectively located on two parallel opposite sides of the parallelogram movable mechanism. This method can better limit the latching tooth to only translate but not rotate, so that in the braking state, the latching tooth can better contact with the rack, thereby improving the braking effect.
[0013] Preferably, the anti-falling device further comprises a guide wheel set, and the guide wheel set rolls along the inner wall of the guide groove. The guide wheel set can facilitate the movement of the brake assembly inside the guide groove, avoid jamming, and improve the convenience of use.
[0014] Preferably, the guide wheel group includes: a first rail wheel, which is arranged on a side close to the guide slot opening area; a second rail wheel, which is arranged on a side of the tower crane close to the guide slot; and a third rail wheel, which is arranged between the first rail wheel and the second rail wheel.
[0015] Preferably, the traction assembly moves along the rack rail via a traction wheel, and the traction assembly has a traction controller. The traction controller controls the rise, fall and stop of the traction assembly. The traction assembly can drive the brake assembly to move up and down along the rack rail, thereby achieving the effect that the anti-fall device can follow, so that the anti-fall device can be contacted at any time. When the anti-fall device fails and needs to be adjusted, it can be adjusted in time, which increases the convenience and safety of the anti-fall device and reduces safety hazards.
[0016] Preferably, an upper limiter is provided at the upper end of the rack rail, and a lower limiter is provided at the lower end of the rack rail.
[0017] Preferably, the elastic component is a spring.
[0018] Preferably, the guide groove is two angle steels arranged opposite to each other and welded to the tower crane.
[0019] Preferably, the second end of the connecting rod is provided with a through hole, and the through hole is used for connecting a safety belt.
[0020] Compared with the prior art, the utility model has the following beneficial effects:
[0021] 1. The utility model provides a fall prevention device for climbing tower cranes. When a fall occurs, the connecting rod of the brake assembly rotates to drive the clamping teeth and the rack rail to mesh tightly, ensuring that there is no relative displacement between the fall prevention device and the rack rail, thereby achieving a braking effect. The braking principle is simple and not prone to failure, thereby improving the safety of the fall prevention device. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 The diagram is a schematic elevation view of a fall prevention device for climbing a tower crane.
[0023] Figure 2 for Figure 1 Cross-sectional view of section AA in FIG.
[0024] Figure 3 It is a partial enlarged view of a brake assembly of a fall prevention device for a climbing tower crane.
[0025] Figure 4 The present invention is a schematic diagram of a braking assembly of a fall prevention device for a climbing tower crane when the braking assembly is in a braking state.
[0026] Markings in the figure:
[0027] 1- Tower crane,
[0028] 2- rack rail,
[0029] 3- Brake assembly,
[0030] 31-Catching teeth,
[0031] 32-Connecting rod,
[0032] 321-rotating shaft, 322-four-link, 323-through hole
[0033] 33- elastic member,
[0034] 4- Traction assembly,
[0035] 41- traction wheel, 42- traction controller,
[0036] 5-Guide wheel set,
[0037] 51-first rail wheel, 52-second rail wheel, 53-third rail wheel,
[0038] 6-Guide groove,
[0039] 7- Seat belts,
[0040] 8-Upper limiter,
[0041] 9-Lower limit stop. DETAILED DESCRIPTION
[0042] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.
[0043] In the description of the specific embodiments of the present invention, unless otherwise specified, the terms indicating the orientation or position relationship such as "upper", "lower", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product / equipment / device of the utility model is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the utility model or simplifying the description in the specific embodiments, so that technicians can quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.
[0044] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the solution of the utility model.
[0045] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.
[0046] In addition, in the description of the embodiments of the present invention, "several", "multiple" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.
[0047] In addition, in the description of the technical solution of the utility model, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication of two components.
[0048] Example 1
[0049] like Figure 1-Figure 3 As shown, a fall prevention device for a climbing tower crane comprises: a guide groove 6, a rack rail 2, a brake assembly 3, and a traction assembly 4.
[0050] The guide groove 6 and the rack rail 2 are both arranged vertically along the tower crane 1 and are welded to the tower crane 1. The guide groove 6 is provided with an opening area, and the opening area is located on a side away from the tower crane 1. The rack rail 2 is located inside the guide groove 6.
[0051] In an optional embodiment, the guide groove 6 can be two angle steels arranged opposite to each other and welded to the tower crane 1. The cross-sectional size of the angle steel can be 90mm*56mm. Figure 2 As shown, the long sides of the two angle steels are welded to the tower crane 1, and the rack rail 2 is located between the two angle steels.
[0052] In an optional embodiment, the rack rail 2 can be a rack steel of 30mm*30mm.
[0053] The brake assembly 3 is located between the guide groove 6 and the rack 2. The brake assembly 3 is provided with a connecting rod 32. The connecting rod 32 is rotatably connected to the brake assembly 3 via a rotating shaft 321. The first end of the connecting rod 32 is connected to a latching tooth 31. In the initial state, the latching tooth 31 can be away from the rack 2 under the action of gravity. Rotating the connecting rod 32 can drive the latching tooth 31 to approach the rack 2 until they are engaged with each other. The second end of the connecting rod 32 passes through the opening area of the guide groove 6 and is located outside the guide groove 6. The second end of the connecting rod 32 is used to connect the safety belt 7. Figure 2 As shown, the cross-sectional shape of the brake assembly 3 can be H-shaped, and the cross-sectional shape of the brake assembly 3 has an upper opening area and a lower opening area, the upper opening area faces the opening area side of the guide groove 6, and the lower opening area faces one side of the tower crane and surrounds the rack 2.
[0054] The working mode of the brake assembly 3 is that the hook of the safety belt 7 is hung on the second end of the connecting rod 32. At this time, the brake assembly 3 is in the initial state, and the safety belt 7 at the second end of the connecting rod 32 is in an untensioned state. The latch 31 connected to the first end of the connecting rod 32 can provide a tendency for the connecting rod 32 to rotate counterclockwise around the rotating shaft 321 due to its own gravity, thereby keeping the latch 31 from contacting the rack 2, ensuring that the brake assembly 3 is in an unbraked state, and the anti-fall device can move up and down along the guide groove 6. In the initial state, there is a gap of 0.5-1.5cm between the latch 31 and the rack 2, and the specific gap can be 1cm. Figure 4 As shown, when a fall occurs, the hook of the safety belt 7 will apply a downward pulling force to the second end of the connecting rod 32, so that the connecting rod 32 will rotate clockwise around the rotating shaft 321. When the connecting rod 32 rotates clockwise, it will drive the latch tooth 31 to translate upward and approach the rack 2. Because the latch tooth 31 can engage with the rack 2, when the two are in contact, relative displacement cannot occur between the latch tooth 31 and the rack 2, thereby achieving a braking effect to prevent the occurrence of a fall accident.
[0055] In an optional embodiment, the brake assembly 3 may be provided with an elastic component 33, and the elastic component 33 can be used to drive the latch 31 to reset. The two ends of the elastic component 33 can be connected to the brake assembly 3 and the first end of the connecting rod 32 respectively, and the elastic component 33 can apply a force to the first end of the connecting rod 32 away from the rack 2. Because vibration may occur during the up and down movement of the brake assembly 3, the latch 31 will come into contact with the rack 2, resulting in unnecessary braking. Therefore, when no braking occurs, the elastic component 33 can maintain the spacing between the latch 31 and the rack 2, avoiding unnecessary braking and affecting the normal use of the anti-fall device. It should be noted that when a fall occurs, the vertical downward pulling force generated by the hook of the safety belt 7 on the second end of the connecting rod 32 is much greater than the pulling force that the elastic component 33 can provide, so as to ensure that the brake assembly 3 can play a braking role when a fall occurs.
[0056] In an optional embodiment, the elastic component 33 may be a spring or an elastic band.
[0057] In an optional embodiment, the connecting rod 32 and the latching tooth 31 can be connected by a four-link 322. The four-link 322 is a parallelogram movable mechanism, and the latching tooth 31 and the brake device 3 are respectively located on two parallel opposite sides of the parallelogram movable mechanism. This structure can better limit the latching tooth 31 to only translate relative to the brake device 3 and the rack 2 without rotating, so that in the braking state, the latching tooth 31 can better contact with the rack 2, thereby improving the braking effect.
[0058] In an optional embodiment, the anti-fall device may include a guide wheel set 5, and the guide wheel set 5 rolls along the inner wall of the guide groove 6. There may be multiple guide wheel sets 5, and they are arranged longitudinally along the guide groove 6. Specifically, there may be two sets of guide wheel sets 5 connected to the upper and lower parts of the brake assembly 3, respectively. The guide wheel set 5 is located between the brake assembly 3 and the guide groove 6, and the guide wheel set 5 can roll along the inner wall of the guide groove 6. The guide wheel set 5 can play a role in positioning the brake assembly 3, and at the same time, enable the brake assembly 3 to move smoothly inside the guide groove 6.
[0059] In one or several embodiments, the guide wheel assembly 5 may include: a first rail wheel 51 , a second rail wheel 52 , and a third rail wheel 53 .
[0060] The first track wheel 51 is arranged at one side of the opening area close to the guide groove 6;
[0061] The second rail wheel 52 is arranged on one side of the tower crane 1 close to the guide groove 6;
[0062] The third rail wheel 53 is disposed between the first rail wheel 51 and the second rail wheel 52 .
[0063] The traction assembly 4 is connected to the upper part of the brake assembly 3, and the traction assembly 4 can move along the rack rail 2 and drive the brake assembly 3 to move. By controlling the traction assembly 4, the entire anti-falling device can play a following role.
[0064] In an optional embodiment, the traction assembly 4 can move along the rack 2 through a traction wheel 41, and the traction wheel 41 has a gear shape and can engage with the rack 2. Two traction wheels 41 can be arranged up and down along the traction assembly 4 to increase the stability of the traction assembly. The traction assembly 4 can have a traction controller 42, and the traction controller 42 controls the movement or stop of the traction assembly 4, and the specific movement mode can be rising and falling. The traction controller 42 is connected to the traction assembly 4 through a data line, and the traction controller 42 moves up and down with the traction assembly 4 so as to be controlled at any time. According to the speed of the up and down movement, the traction controller 42 can control the traction assembly 4 to rise or fall at a constant speed at a certain gear. When reaching the tower crane cab or the ground, or when a temporary rest or adjustment is required in the middle, the traction controller 42 can be used to control the traction assembly 4 to stop moving. When the traction assembly 4 is in a stopped state, the traction wheel 41 can be automatically locked to prevent the anti-fall device from slipping.
[0065] In an optional embodiment, the upper end of the rack 2 may be provided with an upper limiter 8, and the lower end of the rack 2 may be provided with a lower limiter 9. When the anti-fall device rises to the top of the rack 2, the traction assembly 4 can contact the upper limiter 8 to prevent the anti-fall device from derailing. When the anti-fall device descends to the bottom of the rack 2, the brake assembly 3 can contact the lower limiter 9 to prevent the anti-fall device from derailing. The upper limiter 8 and the lower limiter 9 may be provided with a buffer device, which contacts the anti-fall device when limiting occurs, thereby protecting the anti-fall device.
[0066] In an optional embodiment, the second end of the connecting rod 32 may be provided with a through hole 323, which is used to connect the safety belt 7 and serve as a hook fixing point of the safety belt 7. The through hole 323 can ensure that the hook fixing point of the safety belt 7 is in the correct position, thereby improving the safety factor.
[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A falling prevention device for climbing a tower crane, characterized in that: include: A guide groove (6), the guide groove (6) being arranged vertically along the tower crane (1), and the guide groove (6) being provided with an opening area; A rack rail (2), the rack rail (2) being connected to the tower crane (1), and the rack rail (2) being located inside the guide groove (6); A brake assembly (3), wherein the brake assembly (3) is provided with a connecting rod (32), wherein the connecting rod (32) is rotatably connected to the brake assembly (3) via a rotating shaft (321), wherein a first end of the connecting rod (32) is connected to a latching tooth (31), wherein in an initial state, the latching tooth (31) can be moved away from the rack (2) under the action of gravity, and rotating the connecting rod (32) can drive the latching tooth (31) to approach the rack (2) until the two teeth are engaged with each other, wherein the second end of the connecting rod (32) passes through an opening area of the guide groove (6) and is located outside the guide groove (6), and wherein the second end of the connecting rod (32) is used for connecting to a safety belt (7); A traction assembly (4), wherein the traction assembly (4) is connected to the brake assembly (3), and the traction assembly (4) can move along the rack rail (2) and thereby drive the brake assembly (3) to move.
2. The anti-falling device for climbing tower crane according to claim 1, characterized in that: The brake assembly (3) is provided with an elastic component (33), and the elastic component (33) can be used to drive the latching tooth (31) to reset.
3. The anti-falling device for climbing tower crane according to claim 2, characterized in that: The connecting rod (32) and the latching tooth (31) are connected via a four-link rod (322).
4. The anti-falling device for climbing tower crane according to claim 3, characterized in that: It also comprises a guide wheel set (5), wherein the guide wheel set (5) rolls along the inner wall of the guide groove (6).
5. The anti-falling device for climbing tower crane according to claim 4, characterized in that: The guide rail wheel set (5) comprises: A first track wheel (51), the first track wheel (51) being arranged on a side close to an opening area of the guide groove (6); A second rail wheel (52), the second rail wheel (52) being arranged on a side of the tower crane (1) close to the guide groove (6); A third rail wheel (53), wherein the third rail wheel (53) is arranged between the first rail wheel (51) and the second rail wheel (52).
6. The anti-falling device for climbing tower crane according to claim 1, characterized in that: The traction assembly (4) moves along the rack rail (2) via a traction wheel (41), and the traction assembly (4) has a traction controller (42).
7. A falling prevention device for climbing a tower crane according to any one of claims 1 to 6, characterized in that: An upper limiter (8) is provided at the upper end of the rack rail (2), and a lower limiter (9) is provided at the lower end of the rack rail (2).
8. A falling prevention device for climbing a tower crane according to any one of claims 2 to 5, characterized in that: The elastic component (33) is a spring.
9. The anti-falling device for climbing tower crane according to claim 7, characterized in that: The guide groove (6) is composed of two angle steels arranged opposite to each other and welded to the tower crane (1).
10. The anti-falling device for climbing tower crane according to claim 7, characterized in that: The second end of the connecting rod (32) is provided with a through hole (323), and the through hole (323) is used for connecting the safety belt (7).