Construction hoist and its buffer connection device

Abstract

The application belongs to the technical field of engineering construction equipment, and particularly relates to a construction hoist and a buffer connecting device thereof. The buffer connecting device comprises a cage end connecting piece and a driving end connecting piece connected with each other, and a damping material piece is arranged between the cage end connecting piece and the driving end connecting piece. The lifting driving device is movably connected with the guide rail frame device of the construction hoist and drives the cage system to synchronously lift through the buffer connecting device. Since the lifting driving device needs to interact with the guide rail frame device to obtain driving force, the lifting driving device will generate great vibration in the lifting process, and the generated vibration will be transmitted to the cage system through the buffer connecting device and affect the stability of the cage system. In the application, the damping material piece is arranged between the driving end connecting piece and the cage end connecting piece to reduce the vibration transmitted from the lifting driving device to the cage system, so that the stability of the cage system in the lifting process is improved.

Description

Technical Field

[0001] This application belongs to the technical field of engineering construction equipment, and specifically relates to a construction hoist and its buffer connection device. Background Technology

[0002] Construction hoists are essential specialized equipment for transporting personnel and materials to higher levels on construction sites. A construction hoist consists of a guide rail section, a drive section, and a cage section. The stability of the cage section during lifting affects the performance parameters of the construction hoist. In existing technologies, the lifting section generates significant vibrations as it moves along the cage section, causing substantial vibrations in the cage section and thus affecting its stability during lifting. Utility Model Content

[0003] The purpose of this application is to provide a construction hoist and its buffer connection device, which aims to improve the stability of the cage during the hoisting process.

[0004] To achieve the above objectives, this application provides a buffer connection device for a construction hoist, including a cage end connector and a drive end connector connected to each other. A shock-absorbing material is provided between the cage end connector and the drive end connector. The drive end connector is used to connect to the lifting drive device of the construction hoist, and the cage end connector is used to connect to the cage system of the construction hoist.

[0005] In some embodiments, the drive end connector includes a drive end connecting plate and a drive end ear plate disposed on the drive end connecting plate, the cage end connector includes a cage end connecting plate and a cage end ear plate disposed on the cage end connecting plate, the cage end connecting plate and the drive end connecting plate are parallel to each other, and the shock-absorbing material component includes a shock-absorbing rubber pad sandwiched between the cage end connecting plate and the drive end connecting plate.

[0006] In some embodiments, the buffer connection device further includes a buffer connection screw and a buffer connection nut. The buffer connection screw passes through the drive end connection plate, the shock-absorbing rubber pad, and the cage end connection plate. The buffer connection nut is threaded onto the buffer connection screw and engages with the drive end connection plate. The head of the buffer connection screw also engages with the cage end connection plate.

[0007] In some embodiments, the buffer connection device further includes an upper buffer connection disc spring and a lower buffer connection disc spring. The upper buffer connection disc spring is sleeved on the buffer connection screw and located between the upper buffer connection nut and the drive end connection plate. The lower buffer connection disc spring is sleeved on the buffer connection screw and located between the head of the buffer connection screw and the cage end connection plate.

[0008] In some embodiments, the buffer connection device further includes a buffer connection buckle that locks onto the buffer connection screw, the buffer connection buckle being located outside the buffer connection nut and engaging with the buffer connection nut for limiting.

[0009] In some embodiments, a snap-fit ​​groove is formed on the buffer connecting screw, and the buffer connecting buckle snaps into the snap-fit ​​groove.

[0010] In some embodiments, the drive end connector includes a drive end connecting pipe, and the cage end connector includes a buffer connecting headless screw, a cage end connecting plate, a cage end ear plate, and a buffer connecting nut. The buffer connecting headless screw and the cage end ear plate are respectively disposed on both sides of the cage end connecting plate. One end of the buffer connecting headless screw is connected to the cage end connecting plate, and the other end passes through the drive end connecting pipe. The buffer connecting nut is threaded onto the other end of the buffer connecting headless screw and engages with the drive end connecting pipe for limiting. The shock-absorbing material component includes an upper buffer connecting disc spring and a lower buffer connecting disc spring sleeved on the buffer connecting screw. The upper buffer connecting disc spring is located between the drive end connecting pipe and the buffer connecting nut, and the lower buffer connecting disc spring is located between the drive end connecting pipe and the cage end connecting plate.

[0011] In some embodiments, the buffer connection device further includes a buffer connection latch that locks onto the buffer connection headless screw, the buffer connection latch being located outside the buffer connection nut and engaging with the buffer connection nut for limiting.

[0012] In some embodiments, a snap-fit ​​groove is formed on the headless threaded rod of the buffer connection, and the buffer connection snap-fit ​​is engaged in the snap-fit ​​groove.

[0013] This application also provides a construction hoist, including the buffer connection device of the construction hoist as described above.

[0014] The construction hoist and its buffer connection device provided in this application have the following beneficial effects through the above technical solution: The lifting drive device is connected to the drive end connector, and the cage system is connected to the cage end connector. The lifting drive device will generate a large vibration during the movement along the guide rail frame. The vibration transmitted from the lifting drive device to the cage system is reduced by the shock-absorbing material between the drive end connector and the cage end connector, thereby improving the stability of the cage system during the lifting process.

[0015] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings: Figure 1 This is a schematic diagram of the structure of the buffer connection device according to the first embodiment of this application; Figure 2 This is a partial exploded view of the buffer connection device according to the first embodiment of this application; Figure 3 This is a schematic diagram of the structure of the buffer connection device according to the second embodiment of this application; Figure 4 This is a schematic diagram showing the connection between the lifting drive device and the buffer connection device according to a specific embodiment of this application; Figure 5 This is a schematic diagram of the safety hook and cage lugs on the cage system according to a specific embodiment of this application; Figure 6 This is an assembly diagram of the lifting drive device and the cage system according to a specific embodiment of this application; Figure 7 for Figure 3 An enlarged schematic diagram of part A in the middle.

[0017] Explanation of reference numerals in the attached figures 400. Lifting drive device; 422. Safety mounting plate; 4221. Mounting plate hole; 423. Lifting drive connecting pin; 4231. Lifting drive ear plate; 424. Weighing sensor pin; 421. Buffer connection device; 4211. Drive end ear plate; 4212. Buffer connection screw; 4213. Buffer connection buckle; 4214. Buffer connection nut; 4215. Buffer connection headless screw; 4216. Shock-absorbing rubber pad; 4217. Cage end ear plate; 4218. Drive end connecting plate; 4219. Cage end connecting plate; 42110. Snap-fit ​​groove; 42111. Drive end connecting pipe; 42112. Lower buffer connection disc spring; 42113. Upper buffer connection disc spring; 500. Cage system; 538. Safety hook; 5381. Horizontal hook; 5382. Vertical hook; 539. Cage ear plate. Detailed Implementation

[0018] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0019] The terminology of the construction hoist and its buffer connection device according to this application is described below with reference to the accompanying drawings.

[0020] like Figure 1 As shown in the illustration, a specific embodiment of this application provides a buffer connection device 421, including a cage-end connector and a drive-end connector connected to each other. A shock-absorbing material is provided between the cage-end connector and the drive-end connector. The drive-end connector is used to connect to the lifting drive device 400 of a construction hoist, and the cage-end connector is used to connect to the cage system 500 of the construction hoist. By providing a shock-absorbing material between the drive-end connector and the cage-end connector, the vibration transmitted from the lifting drive device 400 to the cage system 500 is reduced, thereby improving the stability of the cage system 500 during the lifting process.

[0021] like Figure 1 As shown, in the first embodiment of this application, the drive-end connector includes a drive-end connecting plate 4218 and a drive-end ear plate 4211 disposed on the drive-end connecting plate 4218. The cage-end connector includes a cage-end connecting plate 4219 and a cage-end ear plate 4217 disposed on the cage-end connecting plate 4219. The cage-end connecting plate 4219 and the drive-end connecting plate 4218 are parallel to each other. The shock-absorbing material component includes a shock-absorbing rubber pad 4216 sandwiched between the cage-end connecting plate 4219 and the drive-end connecting plate 4218. By providing the drive-end connecting plate 4218, the cage-end connecting plate 4219, and the shock-absorbing rubber pad 4216, the contact area between the drive-end connector and the shock-absorbing material component, and between the cage-end connector and the shock-absorbing material component, is increased, thereby enhancing the shock absorption effect.

[0022] In some embodiments, the buffer connection device 421 further includes a buffer connection screw 4212 and a buffer connection nut 4214. The buffer connection screw 4212 passes through the drive end connection plate 4218, the shock-absorbing rubber pad 4216, and the cage end connection plate 4219. The buffer connection nut 4214 is threaded onto the buffer connection screw 4212 and engages with the drive end connection plate 4218. The head of the buffer connection screw 4212 engages with the cage end connection plate 4219, so that the drive end connection plate 4218 and the cage end connection plate 4219 clamp the shock-absorbing rubber pad 4216, thereby enhancing the shock absorption effect.

[0023] Furthermore, the buffer connection device 421 also includes an upper buffer connection disc spring 42113 and a lower buffer connection disc spring 42112. The upper buffer connection disc spring 42113 is sleeved on the buffer connection screw 4212 and located between the buffer connection nut 4214 and the drive end connection plate 4218. The lower buffer connection disc spring 42112 is sleeved on the buffer connection screw 4212 and located between the head of the buffer connection screw 4212 and the cage end connection plate 4219. The vibration transmitted from the lifting drive device 400 to the buffer connection device 421 is reduced by the self-compression of the added upper buffer connection disc spring 42113 and lower buffer connection disc spring 42112, thereby further reducing the vibration transmitted to the cage system 500. At the same time, the heads of the buffer connection nut 4214 and the buffer connection screw 4212 are used to prevent the upper buffer connection disc spring 42113 and lower buffer connection disc spring 42112 from loosening, thereby ensuring the shock absorption effect of the upper buffer connection disc spring 42113 and lower buffer connection disc spring 42112.

[0024] like Figure 2 As shown, in some embodiments, the buffer connection device 421 further includes a buffer connection buckle 4213 locked on the buffer connection screw 4212. The buffer connection buckle 4213 is located outside the buffer connection nut 4214 and engages with the buffer connection nut 4214 for limiting.

[0025] Specifically, the buffer connection buckle 4213 is engaged on the side of the buffer connection nut 4214 away from the head of the buffer connection screw 4212, so as to prevent the buffer connection nut 4214 from being loosened in the direction away from the head of the buffer connection screw 4212 due to the long-term action of the upper buffer connection disc spring 42113, thereby ensuring the shock absorption effect of the upper buffer connection disc spring 42113 and the lower buffer connection disc spring 42112.

[0026] Furthermore, a snap-fit ​​groove 42110 is formed on the buffer connecting screw 4212, and the buffer connecting buckle 4213 snaps into the snap-fit ​​groove 42110. The locking effect of the buffer connecting buckle 4213 on the buffer connecting nut 4214 is further strengthened by the limiting cooperation between the groove wall of the snap-fit ​​groove 42110 and the buffer connecting buckle 4213 along the axial direction of the buffer connecting screw 4212, thereby preventing the buffer connecting nut 4214 from loosening in the direction away from the head of the buffer connecting screw 4212.

[0027] like Figure 3As shown, in the second embodiment of this application, the drive end connector includes a drive end connecting pipe 42111, and the cage end connector includes a buffer connecting headless screw 4215, a cage end connecting plate 4219, a cage end ear plate 4217, and a buffer connecting nut 4214. The buffer connecting headless screw 4215 and the cage end ear plate 4217 are respectively disposed on both sides of the cage end connecting plate 4219. One end of the buffer connecting headless screw 4215 is connected to the cage end connecting plate 4219, and the other end passes through the drive end connecting pipe 42111. The buffer connecting nut... 4214 is threaded onto the other end of the headless bolt 4215 of the buffer connection and is limited to the drive end connecting pipe 42111; the shock-absorbing material components include an upper buffer connecting disc spring 42113 and a lower buffer connecting disc spring 42112, which are sleeved on the headless bolt 4215 of the buffer connection. The upper buffer connecting disc spring 42113 is located between the drive end connecting pipe 42111 and the buffer connecting nut 4214, and the lower buffer connecting disc spring 42112 is located between the drive end connecting pipe 42111 and the cage end connecting plate 4219. The vibration transmitted from the lifting drive device 400 to the buffer connection device 421 is reduced by the self-compression of the upper buffer connection disc spring 42113 and the lower buffer connection disc spring 42112, thereby further reducing the vibration transmitted to the cage system 500. At the same time, the upper buffer connection disc spring 42113 and the lower buffer connection disc spring 42112 are prevented from loosening by the buffer connection nut 4214, thus ensuring the shock absorption effect of the upper buffer connection disc spring 42113 and the lower buffer connection disc spring 42112.

[0028] In some embodiments, the buffer connection device 421 further includes a buffer connection latch 4213 that is locked onto the buffer connection headless screw 4215. The buffer connection latch 4213 is located outside the buffer connection nut 4214 and engages with the buffer connection nut 4214 for limiting.

[0029] Specifically, the buffer connection buckle 4213 is engaged on the side of the buffer connection nut 4214 away from the cage end connecting plate 4219, so as to prevent the buffer connection nut 4214 from being loosened in the direction away from the cage end connecting plate 4219 due to the long-term action of the upper buffer connection disc spring 42113, thereby ensuring the shock absorption effect of the upper buffer connection disc spring 42113 and the lower buffer connection disc spring 42112.

[0030] Furthermore, a snap-fit ​​groove 42110 is formed on the headless screw 4215 of the buffer connection, and the buffer connection buckle 4213 is snapped into the snap-fit ​​groove 42110. The locking effect of the buffer connection buckle 4213 on the buffer connection nut 4214 is further strengthened by the limiting cooperation between the groove wall of the snap-fit ​​groove 42110 and the buffer connection buckle 4213 along the axial direction of the headless screw 4215 of the buffer connection, thereby preventing the buffer connection nut 4214 from loosening in the direction away from the connecting plate 4219 at the end of the cage.

[0031] The first and second embodiments of this application provide two buffer connection devices 421, and the two buffer connection devices 421 are arranged symmetrically, thereby increasing the number of connection points between the lifting drive device 400 and the cage system 500, and thus enhancing the shock absorption effect.

[0032] like Figures 4 to 6 As shown, a specific embodiment of this application provides a connection system for a construction hoist, including a buffer connection device 421, a safety mounting plate 422, and a safety hook 538. The buffer connection device 421 is used to vertically connect the lifting drive device 400 and the cage system 500 of the construction hoist. The safety mounting plate 422 has a mounting hole 4221, and the safety hook 538 is inserted into the safety mounting plate 422 longitudinally. One of the safety mounting plate 422 and the safety hook 538 is used to be installed on the lifting drive device 400, and the other is used to be installed on the cage system 500. Because the connection system employs all the above embodiments of the buffer connection device, it possesses the beneficial effects of all the above embodiments.

[0033] The buffer connection device 421 is the main part connecting the lifting drive device 400 and the cage system 500. The safety hook 538 and the safety hanging plate 422 are auxiliary parts. In other words, when the buffer connection device 421 is damaged, the safety hook 538 will be hooked on the safety hanging plate 422 to connect the cage system 500 and the lifting drive device 400, so as to avoid the cage system 500 and the lifting drive device 400 from separating and causing a safety accident. This improves the connection reliability between the cage system 500 and the lifting drive device 400, and thus improves the safety of the construction hoist.

[0034] In a specific embodiment of this application, the safety hook 538 is installed on the cage system 500, the safety hanging plate 422 is installed on the lifting drive device 400, and the working condition of the buffer connection device 421 connecting the lifting drive device 400 and the cage system 500 is the normal working condition. The working condition of the safety hook 538 and the safety hanging plate 422 connecting the lifting drive device 400 and the cage system 500 is the special working condition.

[0035] like Figure 6 and Figure 7As shown, in some embodiments, the safety hook 538 includes a horizontal hook portion 5381 and a vertical hook portion 5382 connected to each other. The horizontal hook portion 5381 extends longitudinally, with one end connected to the vertical hook portion 5382 and the other end connected to the cage system 500. The horizontal hook portion 5381 is inserted into the safety hanging plate 422 longitudinally, and the vertical hook portion 5382 is longitudinally limited to the safety hanging plate 422. By setting the horizontal hook portion 5381, the safety hook 538 and the safety hanging plate 422 are limited vertically under special working conditions. At the same time, by setting the vertical hook portion 5382, the safety hook 538 and the safety hanging plate 422 are prevented from separating longitudinally under normal working conditions, thus preventing the safety hook 538 and the safety hanging plate 422 from failing to perform their connection function under special working conditions, thereby improving the reliability of the connection system.

[0036] Furthermore, the vertical hole wall of the hanging plate hole 4221 and the horizontal hook part 5381 are arranged vertically at intervals. In other words, under normal working conditions, the safety hook 538 and the safety hanging plate 422 do not serve as a connection, so as to avoid the safety hook 538 and the safety hanging plate 422 being worn or damaged under normal working conditions, thereby improving the reliability of the safety hook 538 and the safety hanging plate 422.

[0037] In some embodiments, there are two safety hooks 538 arranged laterally at intervals, and two safety mounting plates 422 arranged opposite to the two safety hooks 538, in order to enhance the load-bearing capacity of the connection system under special working conditions, thereby improving the safety of the connection system.

[0038] Specifically, the number of buffer connecting devices 421 is one, arranged between the two safety hooks 538; or, the number of buffer connecting devices 421 is two, with each buffer connecting device 421 located outside the two safety hooks 538. The choice between these two configurations depends on actual load-bearing requirements and production costs.

[0039] In some embodiments, the connection system includes a cage lug plate 539 and a weighing sensor pin 424. The cage lug plate 539 is fixedly connected to the cage system 500, and the weighing sensor pin 424 passes through the cage lug plate 539 and the buffer connection device 421. The weighing sensor pin 424 is used to detect the weight of the cage system 500 and is communicatively connected to the lifting drive device 400. Detecting the weight of the cage system 500 using the weighing sensor pin 424 ensures that the weight within the cage system 500 does not exceed the maximum load-bearing capacity of the connection system, thereby guaranteeing the reliability of the connection system.

[0040] In some embodiments, the connection system further includes a lifting drive ear plate 4231 and a lifting drive connecting pin 423. The lifting drive ear plate 4231 is used to be fixedly connected to the lifting drive device 400. The lifting drive connecting pin 423 passes through the lifting drive ear plate 4231 and the buffer connecting device 421. The lifting drive connecting pin 423 and the weighing sensor pin 424 are perpendicular to each other to form a cross structure, thereby reducing the influence of torque.

[0041] In some embodiments, there are multiple cage ear plates 539 and the multiple cage ear plates 539 are parallel to each other to enhance the connection strength between the buffer connection device 421 and the cage system 500.

[0042] In some embodiments, there are multiple lifting drive ear plates 4231 and the multiple lifting drive ear plates 4231 are parallel to each other to enhance the connection strength between the buffer connection device 421 and the lifting drive device 400.

[0043] A specific embodiment of this application also provides a construction hoist, including a buffer connection device 421. Since the construction hoist employs all embodiments of the aforementioned buffer connection device 421, it possesses all the beneficial effects brought about by these embodiments.

[0044] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0046] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0047] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A buffer connection device for a construction hoist, characterized in that, It includes a cage end connector and a drive end connector that are connected to each other. A shock-absorbing material is provided between the cage end connector and the drive end connector. The drive end connector is used to connect to the lifting drive device (400) of the construction hoist, and the cage end connector is used to connect to the cage system (500) of the construction hoist.

2. The buffer connection device according to claim 1, characterized in that, The drive end connector includes a drive end connecting plate (4218) and a drive end ear plate (4211) disposed on the drive end connecting plate (4218). The cage end connector includes a cage end connecting plate (4219) and a cage end ear plate (4217) disposed on the cage end connecting plate (4219). The cage end connecting plate (4219) and the drive end connecting plate (4218) are parallel to each other. The shock-absorbing material component includes a shock-absorbing rubber pad (4216) sandwiched between the cage end connecting plate (4219) and the drive end connecting plate (4218).

3. The buffer connection device according to claim 2, characterized in that, The buffer connection device (421) further includes a buffer connection screw (4212) and a buffer connection nut (4214). The buffer connection screw (4212) passes through the drive end connection plate (4218), the shock-absorbing rubber pad (4216), and the cage end connection plate (4219). The buffer connection nut (4214) is threaded on the buffer connection screw (4212) and is in a limiting fit with the drive end connection plate (4218). The head of the buffer connection screw (4212) is in a limiting fit with the cage end connection plate (4219).

4. The buffer connection device according to claim 3, characterized in that, The buffer connection device (421) further includes an upper buffer connection disc spring (42113) and a lower buffer connection disc spring (42112). The upper buffer connection disc spring (42113) is sleeved on the buffer connection screw (4212) and located between the buffer connection nut (4214) and the drive end connection plate (4218). The lower buffer connection disc spring (42112) is sleeved on the buffer connection screw (4212) and located between the head of the buffer connection screw (4212) and the cage end connection plate (4219).

5. The buffer connection device according to claim 3, characterized in that, The buffer connection device (421) further includes a buffer connection buckle (4213) locked on the buffer connection screw (4212). The buffer connection buckle (4213) is located outside the buffer connection nut (4214) and is limited to the buffer connection nut (4214).

6. The buffer connection device according to claim 5, characterized in that, A snap-fit ​​groove (42110) is formed on the buffer connecting screw (4212), and the buffer connecting buckle (4213) snaps into the snap-fit ​​groove (42110).

7. The buffer connection device according to claim 1, characterized in that, The drive end connector includes a drive end connecting pipe (42111), and the cage end connector includes a buffer connecting headless screw (4215), a cage end connecting plate (4219), a cage end ear plate (4217), and a buffer connecting nut (4214). The buffer connecting headless screw (4215) and the cage end ear plate (4217) are respectively disposed on both sides of the cage end connecting plate (4219). One end of the buffer connecting headless screw (4215) is connected to the cage end connecting plate (4219), and the other end passes through the drive end connecting pipe (42111). The buffer connecting nut (4214) is threaded onto the other end of the buffer connecting headless screw (4215) and is in a limiting fit with the drive end connecting pipe (42111). The shock-absorbing material component includes an upper buffer connecting disc spring (42113) and a lower buffer connecting disc spring (42112) sleeved on the buffer connecting headless screw (4215). The upper buffer connecting disc spring (42113) is located between the drive end connecting pipe (42111) and the buffer connecting nut (4214), and the lower buffer connecting disc spring (42112) is located between the drive end connecting pipe (42111) and the cage end connecting plate (4219).

8. The buffer connection device according to claim 7, characterized in that, The buffer connection device (421) further includes a buffer connection buckle (4213) that is locked on the buffer connection headless screw (4215). The buffer connection buckle (4213) is located outside the buffer connection nut (4214) and is in a limiting engagement with the buffer connection nut (4214).

9. The buffer connection device according to claim 8, characterized in that, The headless screw (4215) of the buffer connection has a snap-fit ​​groove (42110) formed therein, and the buffer connection buckle (4213) snaps into the snap-fit ​​groove (42110).

10. A construction hoist, characterized in that, Includes a buffer connection device (421) for a construction hoist according to any one of claims 1 to 9.

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