Pneumatic hoist with anti-falling safety structure

Abstract

The utility model discloses a pneumatic hoist with an anti-falling safety structure, which relates to the technical field of pneumatic hoists and comprises a sliding seat part, a pneumatic motor, a hook part and a steel wire rope, the pneumatic motor is mounted on the lower side of the sliding seat part, one end of the steel wire rope is arranged in the pneumatic motor, and the other end of the steel wire rope is mounted on the sliding seat part. Two lower guide wheels which are arranged in a mirror symmetry mode are arranged in the hook piece, a mounting plate is arranged on the upper side of the hook piece, upper guide wheels corresponding to the lower guide wheels are rotationally mounted in the mounting plate, and two movable assemblies and two movable guide wheels are arranged in the mounting plate; the movable assemblies and the movable guide wheels are additionally arranged on the basis of the upper guide wheels and the lower guide wheels, so that the whole stroke forms a movable pulley structure, the movable guide wheels serve as an active sensing structure, and in the state, the arc-shaped movement of the two movable assemblies is used for reinforcing and braking the steel wire rope; and potential safety hazards caused by continuous rotation of the steel wire rope are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic hoists, in particular to a pneumatic hoist with an anti-fall safety structure. Background Art

[0002] Pneumatic hoist is an ideal explosion-proof lifting equipment. Its components include air distribution system, power system, deceleration system and winch system. The air distribution system (pneumatic motor) provides power source and acts on the power system to realize the lifting and lowering operations of lifting heavy objects.

[0003] It should be noted that in daily use, due to wear, looseness or improper maintenance, such as damage to the guide, damage to the buffer, damage to the hoist brake, etc., the common problem of abnormal descent of the hoisted load during the lifting stage may occur. In this process, there may be major safety hazards;

[0004] To this end, this application proposes a solution. Utility Model Content

[0005] The utility model aims to provide a pneumatic hoist with an anti-fall safety structure, which is used to solve the problem that the existing pneumatic hoist may fall abnormally during use and cause great safety hazards.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a pneumatic hoist with an anti-fall safety structure, comprising a sliding seat, a pneumatic motor, a hook member and a wire rope, wherein the pneumatic motor is installed at the lower side of the sliding seat, one end of the wire rope is arranged in the pneumatic motor, and the other end of the wire rope is installed on the sliding seat;

[0007] The hook member is provided with two lower guide wheels arranged in mirror symmetry, and a mounting plate is provided on the upper side of the hook member, an upper guide wheel corresponding to the lower guide wheel is rotatably mounted in the mounting plate, and two groups of movable components and two movable guide wheels are arranged inside the mounting plate, and the steel wire rope passes through the upper guide wheel, the lower guide wheel, the movable guide wheel and the movable component respectively;

[0008] The two movable guide wheels rotate at the outer center point position, and two groups of intermediate spring plates are installed between the two directional sleeves. The two groups of intermediate spring plates are respectively in the shape of an arch that bends upward and downward. The movable component includes a directional plate and three reinforced guide wheels. The outer contour of the directional plate is an equilateral triangle, and the three reinforced guide wheels are rotatably connected at the triangular position of the directional plate.

[0009] It is further configured that: a corresponding directional sleeve straight slide groove is provided on the mounting plate, and the setting direction of the straight slide groove is parallel to the horizontal direction.

[0010] It is further configured that: a fixed pin and a movable pin are fixedly installed on the outer surface of the directional plate, and an arc-shaped sliding groove corresponding to the movable pin is opened on the installation plate.

[0011] It is further configured as follows: the two movable pins are installed at a corner position of the directional plate close to each other, and the two fixed pins are installed at a diagonal position of the directional plate away from each other.

[0012] It is further configured as follows: the steel wire rope passes through the middle position of the corresponding fixed pin and movable pin in the movable component, wherein the two reinforced guide wheels are located on one side of the steel wire rope.

[0013] The utility model has the following beneficial effects:

[0014] 1. The overall structure is based on the basic principle of the current pneumatic hoist, and proposes to add two key parts: a moving guide wheel and a movable component. Among them, a moving pulley structure is formed between the moving guide wheel, the lower guide wheel, and the upper guide wheel. On the basis of the moving pulley structure, the "sensing structure" that senses the overall motion state is realized by limiting the relative distance between the two moving guide wheels. Its essence is: when there is no abnormality, the passive guide wheel of the wire rope is squeezed outward and does not interfere with the overall motion state. However, when an abnormality occurs, the two moving guide wheels are squeezed inward, thereby changing the relative running stroke of the wire rope;

[0015] 2. In combination with the above content, the active component is used as the action structure of the "sensing structure", which only indirectly affects the movement state of the wire rope passing through the active component when the two moving guide wheels move inward. Its essence is: the active component deflects in the opposite direction with the movement of the moving guide wheels, so that the three reinforced guide wheels cooperate with each other to reinforce and squeeze the wire rope. Its purpose is: in an abnormal situation, the three reinforced guide wheels can limit or stop the transmission of the wire rope to avoid falling problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the structure of the pneumatic hoist with an anti-fall safety structure proposed by the utility model;

[0018] Figure 2 A cross-sectional view of a middle-end component of a pneumatic hoist with an anti-fall safety structure proposed by the utility model;

[0019] Figure 3 The utility model provides a pneumatic hoist with an anti-fall safety structure. Figure 2 A front view of

[0020] Figure 4 This is a disassembled diagram of the middle-end component of the pneumatic hoist with an anti-fall safety structure proposed by the utility model;

[0021] Figure 5 The utility model is a schematic diagram of the structure of the middle spring plate in the pneumatic hoist with an anti-fall safety structure.

[0022] In the figure: 1. sliding seat; 2. pneumatic motor; 3. mounting plate; 301. arc slide; 302. straight slide; 4. hook member; 5. movable assembly; 501. directional plate; 502. fixed pin; 503. movable pin; 504. reinforcement guide wheel; 6. wire rope; 7. upper guide wheel; 8. lower guide wheel; 9. movable guide wheel; 10. middle spring plate; 11. directional sleeve. DETAILED DESCRIPTION

[0023] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1

[0025] Reference Figures 1 to 5 The pneumatic hoist with an anti-fall safety structure in this embodiment includes a slide member 1, a pneumatic motor 2, a hook member 4 and a wire rope 6. The pneumatic motor 2 is installed at the lower side of the slide member 1, one end of the wire rope 6 is arranged in the pneumatic motor 2, and the other end of the wire rope 6 is installed on the slide member 1;

[0026] The hook member 4 is provided with two lower guide wheels 8 which are arranged in mirror symmetry, and a mounting plate 3 is provided on the upper side of the hook member 4, an upper guide wheel 7 corresponding to the lower guide wheel 8 is rotatably mounted on the mounting plate 3, and two groups of movable components 5 and two movable guide wheels 9 are arranged inside the mounting plate 3, and the wire rope 6 passes through the upper guide wheel 7, the lower guide wheel 8, the movable guide wheel 9 and the movable component 5 respectively;

[0027] There is a directional sleeve 11 rotating at the external center point position of the two moving guide wheels 9, and two groups of intermediate spring plates 10 are installed between the two directional sleeves 11. The two groups of intermediate spring plates 10 are respectively in the shape of an arch that is bent upward and downward. The movable component 5 includes a directional plate 501 and three reinforced guide wheels 504. The outer contour of the directional plate 501 is an equilateral triangle, and the three reinforced guide wheels 504 are rotatably connected at the triangular position of the directional plate 501.

[0028] Basic principle: The overall structure is a structure that uses the slide seat 1 as a connection to the slide rail, and the pneumatic motor 2 as a power source. When the pneumatic motor 2 is started, the steel wire rope 6 is wound up in two actions. This part refers to Figure 3 To explain, the overall structure is formed by a movable pulley structure between the upper guide wheel 7 and the lower guide wheel 8, and a movable guide wheel 9 is specially added. The two movable guide wheels 9 will not actively participate in the transmission process of the wire rope, but serve as a "sensing structure" in the overall operating state;

[0029] It should be noted that: in the initial state, the two moving guide wheels 9 are stretched outward by the two sets of middle spring plates 10. When no unexpected situation occurs to the pneumatic motor 2 and the weight of the lifting object is not overweight, the whole device is in a normal state. It should also be noted that: when the lifting object is lifted, the hook member 4 will also be subjected to an upward "pulling force", so that the weight of the lifting object will not directly act on the moving guide wheel 9.

[0030] On the contrary, when an unexpected situation occurs, no matter how the pneumatic motor 2 is started, the lifting object lifted by the hook member is in the process of moving downward, so that the two moving guide wheels 9 are subjected to a greater inner force, causing the two moving guide wheels 9 to approach each other and then the middle spring plate 10 to deform to a greater extent, until the wire rope 6 between the moving guide wheel 9 and the lower guide wheel 8 becomes horizontal. In this state, it is then understood that the overall operating stroke is in an abnormal state.

[0031] Embodiment 2

[0032] This example is to explain the active components in Example 1:

[0033] A straight slide groove 302 corresponding to the directional sleeve 11 is provided on the mounting plate 3, and the setting direction of the straight slide groove 302 is parallel to the horizontal direction. A fixed pin 502 and a movable pin 503 are fixedly installed on the outer surface of the directional plate 501, and an arc-shaped slide groove 301 corresponding to the movable pin 503 is provided on the mounting plate 3. The two movable pins 503 are installed at a corner position of the directional plate 501 close to each other, and the two fixed pins 502 are installed at a diagonal position of the directional plate 501 away from each other. The wire rope 6 passes through the middle position of the corresponding fixed pin 502 and the movable pin 503 in the movable component 5, and the two reinforced guide wheels 504 are located on one side of the wire rope 6.

[0034] Solution description: As shown in the first embodiment, when an abnormal state occurs, because the shape of the wire rope 6 between the movable guide wheel 9 and the lower guide wheel 8 changes, the shape of the wire rope 6 between the movable guide wheel 9 and the movable component 5 will also change. In this process, refer to Figure 4 It is explained that: with the fixed pin 502 as the "starting point", the two movable components 5 are deflected;

[0035] by Figure 3 The positional relationship shown in the figure is used to illustrate: the movable component 5 on the left side can only be deflected to the right, while the movable component 5 on the right side can only be deflected to the left. Its essence is to directly interfere with the shape of the wire rope 6 between the movable guide wheel 9 and the movable component 5. Specifically, the wire rope 6 is reinforced with three reinforced guide wheels 504 to avoid the problem of the wire rope falling due to continuous transmission in unexpected situations.

[0036] To sum up: based on the upper guide wheel and the lower guide wheel, active components and dynamic guide wheels are added to make the overall stroke form a dynamic pulley structure, and the dynamic guide wheel is used as an active "sensing structure". In this state, the arc motion of the two active components is used to reinforce the braking effect on the wire rope to prevent the wire rope from continuing to rotate and causing safety hazards.

[0037] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is only limited by the claims and their full scope and equivalents.

Claims

1. A pneumatic hoist with an anti-fall safety structure, comprising a sliding seat (1), a pneumatic motor (2), a hook (4) and a steel wire rope (6), characterized in that: The pneumatic motor (2) is mounted on the lower side of the slide member (1), one end of the steel wire rope (6) is arranged in the pneumatic motor (2), and the other end of the steel wire rope (6) is mounted on the slide member (1); The hook member (4) is provided with two lower guide wheels (8) arranged in a mirror-symmetrical manner, and a mounting plate (3) is provided on the upper side of the hook member (4), an upper guide wheel (7) corresponding to the lower guide wheel (8) is rotatably mounted on the mounting plate (3), and two groups of movable components (5) and two movable guide wheels (9) are arranged inside the mounting plate (3), and the steel wire rope (6) passes through the upper guide wheel (7), the lower guide wheel (8), the movable guide wheel (9) and the movable component (5) respectively; The two movable guide wheels (9) are provided with a directional sleeve (11) which rotates at the outer center point position, and two groups of intermediate spring plates (10) are installed between the two directional sleeves (11). The two groups of intermediate spring plates (10) are respectively in the shape of an arch that bends upward and downward. The movable component (5) includes a directional plate (501) and three reinforced guide wheels (504). The outer contour of the directional plate (501) is an equilateral triangle, and the three reinforced guide wheels (504) are rotatably connected at the triangular position of the directional plate (501).

2. The pneumatic hoist with an anti-fall safety structure according to claim 1, characterized in that: The mounting plate (3) is provided with a straight slide groove (302) corresponding to the directional sleeve (11), and the setting direction of the straight slide groove (302) is parallel to the horizontal direction.

3. The pneumatic hoist with an anti-fall safety structure according to claim 2, characterized in that: A fixed pin (502) and a movable pin (503) are fixedly mounted on the outer surface of the directional plate (501), and an arc-shaped sliding groove (301) corresponding to the movable pin (503) is provided on the mounting plate (3).

4. The pneumatic hoist with an anti-fall safety structure according to claim 3, characterized in that: The two movable pins (503) are installed at a corner position of the directional plate (501) close to each other, and the two fixed pins (502) are installed at a diagonal position of the directional plate (501) far away from each other.

5. The pneumatic hoist with an anti-fall safety structure according to claim 4, characterized in that: The steel wire rope (6) passes through the middle position of the corresponding fixed pin (502) and the movable pin (503) in the movable component (5), and the two reinforced guide wheels (504) are located on one side of the steel wire rope (6).

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