Protective device and aerial work equipment

Abstract

The present invention discloses a protective device and aerial work equipment, comprising a bracket and a cover, wherein the upper side of the cover is hinged with the upper side of the bracket, and further comprising a pull-down device, wherein the pull-down device comprises a fixed pulley, a movable pulley, a push rod and a pull rope, wherein the fixed pulley is fixedly connected to the cover, the movable pulley is located above the fixed pulley, the movable pulley is slidably connected to the cover, the fixed end of the pull rope passes through the movable pulley and is connected to the fixed pulley, and the upper end of the push rod is connected to the movable pulley. After the cover is opened from the bracket, the push rod and the movable pulley move downward under the action of gravity, so that the handle end of the pull rope hangs down, thereby facilitating the operator to pull the handle end; when the cover needs to be closed, the handle end is pulled downward, and after the lower end of the push rod abuts against the bracket, the movable pulley moves upward, which drives the handle end of the pull rope to move upward, so as to play the role of storing the pull rope.

Description

Technical Field

[0001] The present invention relates to the field of engineering machinery and equipment, in particular to a protective device, and also to an aerial work equipment comprising the protective device. Background Art

[0002] The power, hydraulic and electrical devices of aerial work equipment are usually installed in a closed protective device to prevent collision and rain. In addition, it can also prevent operators from contacting the above devices and being injured.

[0003] For the convenience of maintenance, the cover of the protective device can usually be opened and closed. For medium and large aerial work equipment, after the cover is opened, the edge of the cover will be at a higher position, and it is difficult for the operator standing on the ground to touch the cover. The operator needs to climb to a higher place with the help of external objects to close the cover, which is not only inconvenient to operate, but also poses certain safety hazards.

[0004] Therefore, how to provide a protective device that is convenient for an operator to close the cover is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] One object of the present invention is to provide a protective device that can effectively solve the problem of the inconvenience of closing the cover, and another object is to provide an aerial work equipment including the above-mentioned protective device.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A protective device comprises a bracket and a cover, the upper side of the cover is hinged to the upper side of the bracket, and also comprises a pull-down device, the pull-down device comprises a fixed pulley, a movable pulley, a push rod and a pull rope, the fixed pulley is fixedly connected to the cover, the movable pulley is located above the fixed pulley, the movable pulley is slidably connected to the cover, the fixed end of the pull rope passes around the movable pulley and is connected to the fixed pulley, the upper end of the push rod is connected to the movable pulley, and under the action of gravity, the push rod and the movable pulley cause the handle end of the pull rope to hang down, and the handle end of the pull rope is pulled downward, the cover moves downward, and after the lower end of the push rod abuts against the bracket, the movable pulley is pushed upward to drive the handle end of the pull rope to move upward.

[0008] Preferably, the pull-down device further comprises a support plate, the support plate is fixedly connected to the cover member, a slide groove is provided on the support plate, the fixed pulley is arranged at the bottom of the support plate, and the movable pulley is slidably connected to the slide groove.

[0009] Preferably, the support plate is fixedly connected to the inner side wall of the cover.

[0010] Preferably, the upper end of the push rod is hinged to the movable pulley.

[0011] Preferably, a limiting portion for abutting against the push rod is provided at the bottom of the bracket.

[0012] Preferably, cushion blocks are respectively provided at the upper portion of the limiting portion and the lower end of the push rod.

[0013] Preferably, it also includes an elastic member, both ends of which are respectively connected to the cover member and the movable pulley, and the movable pulley moves downward under the action of its gravity and the elastic force of the elastic member; the elastic member is compressed and deformed after the push rod and the bracket are against each other.

[0014] Preferably, the elastic member is a spring, the upper end of the spring is connected to the covering member, and the lower end of the spring is connected to the movable pulley.

[0015] Preferably, the pulling device comprises a plurality of the fixed pulleys and a plurality of the movable pulleys, and the pull rope passes around the fixed pulleys and the movable pulleys in sequence.

[0016] A high-altitude working equipment comprises any one of the protective devices described above.

[0017] Compared with the prior art, the above technical solution has the following advantages:

[0018] A protective device and aerial work equipment provided by the present invention include a bracket and a cover, the upper side of the cover is hinged with the upper side of the bracket, and also includes a pull-down device, the pull-down device includes a fixed pulley, a movable pulley, a push rod and a pull rope, the fixed pulley is fixedly connected to the cover, the movable pulley is located above the fixed pulley, the movable pulley is slidably connected to the cover, the fixed end of the pull rope bypasses the movable pulley and is connected to the fixed pulley, and the upper end of the push rod is connected to the movable pulley. After the cover is opened from the bracket, the push rod and the movable pulley move downward under the action of gravity, so that the handle end of the pull rope hangs down, so that it is convenient for the operator to pull the handle end; when the cover needs to be closed, the handle end is pulled downward, the cover moves downward, and when the lower end of the push rod abuts against the bracket, the pulley is pushed upward, which drives the handle end of the pull rope to move upward to play the role of storing the pull rope. In addition, the pull-down device is a purely mechanical structure, and there is no need to use a motor to pull the pull rope, so the structure is simple and easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or 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 some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic structural diagram of a protective device provided by a first specific embodiment of the present invention when in a closed state;

[0021] Figure 2 for Figure 1 A schematic diagram of the structure of the pull-down device in FIG.

[0022] Figure 3 It is a structural schematic diagram when the first protection device is in the open state;

[0023] Figure 4 for Figure 3 A schematic diagram of the structure of the pull-down device in FIG.

[0024] Figure 5 It is a structural schematic diagram of a protective device having a plurality of fixed pulleys and movable pulleys in a closed state;

[0025] Figure 6 for Figure 5 A schematic diagram of the structure of the pull-down device in FIG.

[0026] Figure 7 It is a structural schematic diagram of a protective device having a plurality of fixed pulleys and movable pulleys in an open state;

[0027] Figure 8 for Figure 7 A schematic diagram of the structure of the pull-down device in FIG.

[0028] Fig. 9 A schematic structural diagram of a protective device provided in a second specific embodiment of the present invention when in a closed state;

[0029] Fig.10 for Fig. 9 A schematic diagram of the structure of the pull-down device in FIG.

[0030] Fig.11 is a schematic diagram of the structure when the second protection device is in the open state;

[0031] Fig.12 for Fig.11 A schematic diagram of the structure of the pull-down device in FIG.

[0032] Fig.13 is a schematic structural diagram of a second protection device having a plurality of fixed pulleys and movable pulleys in a closed state;

[0033] Fig.14 for Fig.13 A schematic diagram of the structure of the pull-down device in FIG.

[0034] Fig.15 is a schematic structural diagram of a second protection device having a plurality of fixed pulleys and movable pulleys in an open state;

[0035] Fig.16 for Fig.15 Schematic diagram of the structure of the pull-down device.

[0036] The reference numerals are as follows:

[0037] 1 is a bracket, 101 is a limiting part, 2 is a covering member, 3 is a rotating hinge, 4 is a pull-down device, 401 is a pull rope, 402 is a handle end, 403 is a fixed pulley, 404 is a movable pulley, 405 is a support plate, 406 is a slide groove, 407 is a push rod, and 408 is a spring. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0039] In the following description, specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in a variety of other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0040] Please refer to Figure 1 to Figure 4 , Figure 1 A schematic structural diagram of a protective device provided by a first specific embodiment of the present invention when in a closed state; Figure 2 for Figure 1 A schematic diagram of the structure of the pull-down device in FIG. Figure 3 It is a structural schematic diagram when the first protection device is in the open state; Figure 4 for Figure 3 Schematic diagram of the structure of the pull-down device.

[0041] A specific embodiment of the present invention provides a protective device, including a bracket 1 and a cover 2, the upper side of the cover 2 and the upper side of the bracket 1 can be hinged by a rotating hinge 3, and also includes a pull-down device 4, the pull-down device 4 includes a fixed pulley 403, a movable pulley 404, a push rod 407 and a pull rope 401, the fixed pulley 403 is fixedly connected to the cover 2, the movable pulley 404 is located above the fixed pulley 403, the movable pulley 404 is slidably connected to the cover 2, the fixed end of the pull rope 401 bypasses the movable pulley 404 and is connected to the fixed pulley 403, and the upper end of the push rod 407 is connected to the movable pulley 404. After the cover 2 is opened from the bracket 1, the push rod 407 and the movable pulley 404 move downward under the action of gravity, so that the handle end 402 of the pull rope 401 hangs down, so that it is convenient for the operator to pull the handle end 402; when the cover 2 needs to be closed, the handle end 402 is pulled downward, and the cover 2 moves downward. When the lower end of the push rod 407 abuts against the bracket 1, the pulley 404 is pushed upward, which drives the handle end 402 of the pull rope 401 to move upward to store the pull rope 401. In addition, the pull-down device 4 is a purely mechanical structure, and there is no need to use a motor to pull the pull rope 401, so the structure is simple and easy to maintain.

[0042] Further, the pull-down device 4 further comprises a support plate 405, wherein the support plate 405 is preferably located on the inner side of the cover 2, so after the cover 2 is closed, the pull-down device 4 can be located in the protective device to protect the pull-down device 4. In addition, the support plate 405 is fixedly connected to the inner side wall of the cover 2, for example, it can be connected by welding or fasteners, and a slide groove 406 is provided on the support plate 405, the fixed pulley 403 is arranged at the bottom of the support plate 405, and the movable pulley 404 is slidably connected to the slide groove 406, wherein the support plate 405 is preferably vertically arranged on the strip inside the cover 2, and the slide groove 406 extends along the length direction of the strip accordingly.

[0043] In order to facilitate the push rod 407 to drive the movable pulley 404 to move downward and the lower end of the push rod 407 to contact the bracket 1, the upper end of the push rod 407 is hinged to the movable pulley 404, that is, the push rod 407 can always be in a vertical state after the cover 2 is opened.

[0044] In addition, in order to facilitate the contact between the push rod 407 and the bracket 1, the bottom of the bracket 1 is provided with a limiter 101 for abutting against the push rod 407. Secondly, in order to improve the supporting capacity of the limiter 101 to the push rod 407, the upper part of the limiter 101 and the lower end of the push rod 407 are respectively provided with pads.

[0045] Please refer to Figures 9 to 12, and also includes an elastic member, the two ends of which are connected to the cover 2 and the movable pulley 404 respectively. When the cover 2 is opened, the movable pulley 404 moves downward under the combined action of its gravity and the elastic force of the elastic member to ensure that the handle end 402 of the pull rope 401 hangs down; when the cover 2 needs to be closed, the pull rope 401 is pulled downward, the cover 2 moves downward, and the elastic member is compressed and deformed after the push rod 407 and the bracket 1 are abutted, so that when the cover 2 is opened again, the elastic force of the elastic member pushes the movable pulley 404 and the push rod 407 downward. Among them, the elastic member is preferably a spring 408, the upper end of the spring 408 is connected to the cover 2, and the lower end of the spring 408 is connected to the movable pulley 404.

[0046] Please refer to Figures 5 to 8 as well as Figure 13 to Figure 16 In this embodiment, the pulling device 4 includes a plurality of fixed pulleys 403 and a plurality of movable pulleys 404, and the pull rope 401 passes around the movable pulleys 404 and the fixed pulleys 403 in sequence. The plurality of fixed pulleys 403 and the plurality of movable pulleys 404 can increase the ratio of the length of the pull rope 401 to the rising height of the push rod 407. For example, when there is one fixed pulley 403 and one movable pulley 404, the ratio of the length of the pull rope 401 to the rising height of the push rod 407 is 2:1. For example, when there are two fixed pulleys 403 and two movable pulleys 404, the ratio of the length of the pull rope 401 to the rising height of the push rod 407 is 4:1.

[0047] An embodiment of the present invention further provides an aerial work equipment, including the protective device provided by any of the above embodiments, and the bracket 1 can be a turntable side panel and a turntable tray. The beneficial effects of the aerial work equipment can be referred to the above protective device and will not be repeated here.

[0048] It should also be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0049] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A protective device, comprising a support (1) and a cover (2), wherein the upper side of the cover (2) is hinged to the upper side of the support (1), characterized in that: The invention also comprises a pull-down device (4), the pull-down device (4) comprising a fixed pulley (403), a movable pulley (404), a push rod (407) and a pull rope (401), the fixed pulley (403) being fixedly connected to the cover member (2), the movable pulley (404) being located above the fixed pulley (403), the movable pulley (404) being slidably connected to the cover member (2), the fixed end of the pull rope (401) passing around the movable pulley (404) and being connected to the fixed pulley (403), and the The upper end of the push rod (407) is connected to the movable pulley (404). Under the action of gravity, the push rod (407) and the movable pulley (404) cause the handle end (402) of the pull rope (401) to hang down. The handle end (402) of the pull rope (401) is pulled downward, and the cover (2) moves downward. After the lower end of the push rod (407) abuts against the bracket (1), the movable pulley (404) is pushed upward, thereby driving the handle end (402) of the pull rope (401) to move upward.

2. The protective device according to claim 1, characterized in that: The pull-down device (4) further comprises a support plate (405), the support plate (405) being fixedly connected to the cover member (2), a slide groove (406) being provided on the support plate (405), the fixed pulley (403) being arranged at the bottom of the support plate (405), and the movable pulley (404) being slidably connected to the slide groove (406).

3. The protective device according to claim 2, characterized in that: The support plate (405) is fixedly connected to the inner side wall of the cover (2).

4. The protection device according to claim 1, characterized in that: The upper end of the push rod (407) is hinged to the movable pulley (404).

5. The protection device according to claim 1, characterized in that: The bottom of the bracket (1) is provided with a limiting portion (101) for abutting against the push rod (407).

6. The protection device according to claim 5, characterized in that: Cushion blocks are respectively provided at the upper portion of the limiting portion (101) and the lower end of the push rod (407).

7. The protection device according to claim 1, characterized in that: It also includes an elastic member, both ends of which are connected to the cover member and the movable pulley respectively. The movable pulley moves downward under the action of its gravity and the elastic force of the elastic member. The elastic member is compressed and deformed after the push rod and the bracket are against each other.

8. The protection device according to claim 7, characterized in that: The elastic member is a spring, the upper end of the spring is connected to the covering member, and the lower end of the spring is connected to the movable pulley.

9. The protection device according to any one of claims 1 to 8, characterized in that: The pull-down device (4) comprises a plurality of fixed pulleys (403) and a plurality of movable pulleys (404), and the pull rope (401) passes around the fixed pulleys (403) and the movable pulleys (404) in sequence.

10. A high-altitude working equipment, characterized in that: A protective device comprising any one of claims 1 to 9.

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