CN214401687U

CN214401687U - Screw hoist crosses spacing protection device

Info

Publication number: CN214401687U
Application number: CN202022495148.0U
Authority: CN
Inventors: 刘波
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-31
Filing date: 2020-10-31
Publication date: 2021-10-15
Anticipated expiration: 2030-10-31

Abstract

The application discloses an over-limit protection device of a screw hoist, which comprises an upper shell, a lower shell and a connecting piece connected between the upper shell and the lower shell, wherein the upper shell is fixedly connected on a shell of the screw hoist, and the threaded rod on the threaded rod hoist sequentially passes through the upper shell, the movable shell and the lower shell, two limiting plates are fixedly connected on the surface of the threaded rod, the two limiting plates are respectively lapped with one of the mounting plates, the two mounting plates are respectively fixedly connected on the inner wall of the movable shell, the top and the bottom of removal shell respectively with the inner wall sliding connection of last shell and lower shell, two limiting plates are located two mounting panel opposite sides respectively, and one side of two mounting panels all is provided with two and connects the electric subassembly, all is provided with in last shell and the lower shell inner chamber and connects the electric subassembly, connects among the electric subassembly to connect the power supply circuit of electric shell fragment series connection access screw headstock gear. The application provides a screw hoist that reliability is high crosses limit protection device.

Description

Screw hoist crosses spacing protection device

Technical Field

The application relates to an over-limit protection device, in particular to an over-limit protection device for a screw hoist.

Background

The screw hoist is a machine which uses a threaded rod to connect with a gate leaf directly or through a guide slide block and a connecting rod, and the screw moves up and down to hoist the gate. With the wide development of water conservancy and hydropower engineering, a large number of gates and hoist machines are adopted for engineering projects such as reservoir irrigation area river dams, hydropower stations and the like. And the knowledge of the installation and debugging technology and the use and maintenance thereof also needs to be widely popularized. Aiming at building installation units and use management departments, the technology and knowledge should be popularized to ensure the engineering quality and give play to the engineering benefits.

The opening force of the screw hoist is usually larger than the closing force, and the capacity of the motor is selected according to the opening and closing load, so that if the gate is blocked or the stroke limiting device fails when the gate runs to the bottom sill position in the closing process, the downward pressure of the hoist can greatly exceed the preset closing load, and the screw is unstably bent or the performance of the whole hoist is damaged due to the upward lifting force. Therefore, the over-limit protection device of the screw hoist is provided for solving the problems.

Disclosure of Invention

An over-limit protection device of a screw hoist comprises an upper shell, a lower shell and a connecting piece connected between the upper shell and the lower shell, wherein the upper shell is fixedly connected on a shell of the screw hoist, and the threaded rod on the threaded rod hoist sequentially passes through the upper shell, the movable shell and the lower shell, two limiting plates are fixedly connected on the surface of the threaded rod, the two limiting plates are respectively lapped with one of the mounting plates, the two mounting plates are respectively fixedly connected on the inner wall of the movable shell, the top and the bottom of removal shell respectively with the inner wall sliding connection of last shell and lower shell, two limiting plates are located two mounting panel opposite sides respectively, and one side of two mounting panels all is provided with two and connects the electric subassembly, all is provided with in last shell and the lower shell inner chamber and connects the electric subassembly, connects among the electric subassembly to connect the power supply circuit of electric shell fragment series connection access screw headstock gear.

Further, be located two of mounting panel one side connect the electric subassembly to use the threaded rod to set up as symmetry axis symmetry, connect the electric subassembly to include the mounting bracket, connect electric shell fragment, telescopic link and spring, the mounting bracket rigid coupling is on last shell or lower shell inside wall, the symmetry is provided with two telescopic links on the mounting bracket, and the rigid coupling has the electric shell fragment that connects that closely laminates each other on the tip of two telescopic links, the spring has been cup jointed on the telescopic link.

Furthermore, the telescopic link is made by insulating hard material, the telescopic link comprises two pipe bodys that slide each other and cup joint, the both ends of spring rigid coupling respectively is on two pipe bodys, connect the electric shell fragment and make by copper metal material, and connect one side that the electric shell fragment is close to the mounting panel and be the structure of buckling, and two connect the junction one side of electric shell fragment to be provided with insulating plugboard.

Furthermore, the insulating insertion plate is made of an insulating hard material and fixedly connected to the mounting plate, and the joint of the insulating insertion plate, which is close to the electric connection elastic sheet, is of a pointed structure.

Furthermore, the joints of the upper shell, the lower shell and the movable shell are provided with sealing rubber strips, the sealing rubber strips are fixedly connected to the inner side walls of the upper shell and the lower shell, and the sealing rubber strips are tightly attached to the outer side walls of the movable shell.

Furthermore, the distance between the insulating insertion plate and the connection part between the two electric connection elastic sheets is equal to the single-stroke distance of the screw hoist.

The beneficial effect of this application is: the application provides a screw hoist that reliability is high crosses limit protection device.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic overall structure diagram of an embodiment of the present application;

FIG. 2 is a schematic diagram of the internal structure of the upper housing, the lower housing and the movable housing according to an embodiment of the present application;

fig. 3 is a schematic view of a portion a of fig. 2 according to an embodiment of the present disclosure.

In the figure: 1. go up shell, 2, lower shell, 3, remove the shell, 4, connecting piece, 5, threaded rod, 6, mounting panel, 7, insulating plugboard, 8, mounting bracket, 9, connect electric shell fragment, 10, telescopic link, 11, spring, 12, joint strip, 13, screw rod headstock gear, 14, limiting plate.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1-3, a screw hoist over-limit protection device includes an upper casing 1, a lower casing 2 and a connecting member 4 connected between the upper casing 1 and the lower casing 2, the upper casing 1 is fixedly connected to a casing of a screw hoist 13, a threaded rod 5 on the screw hoist 13 sequentially passes through the upper casing 1, a movable casing 3 and the lower casing 2, the threaded rod 5 is fixedly connected to two limit plates 14 on the surface, the two limit plates 14 are respectively overlapped with one of the mounting plates 6, the two mounting plates 6 are respectively fixedly connected to an inner wall of the movable casing 3, a top end and a bottom end of the movable casing 3 are respectively connected to inner walls of the upper casing 1 and the lower casing 2 in a sliding manner, the two limit plates 14 are respectively located at opposite sides of the two mounting plates 6, two electrical connection assemblies are respectively arranged at one side of the two mounting plates 6, electrical connection assemblies are respectively arranged in inner cavities of the upper casing 1 and the lower casing 2, the electric connection elastic sheet 9 in the electric connection assembly is connected in series into a power supply circuit of the screw hoist 13.

Lie in two of 6 one sides of mounting panel connect the electric subassembly to use threaded rod 5 to set up as symmetry axis symmetry, connect the electric subassembly to include mounting bracket 8, connect electric shell fragment 9, telescopic link 10 and

spring

11, 8 rigid couplings of mounting bracket are on

last shell

1 or 2 inside walls of lower shell, the symmetry is provided with two telescopic links 10 on the mounting bracket 8, and the rigid coupling has the electric shell fragment 9 that connects of closely laminating each other on the tip of two telescopic links 10, spring 11 has been cup jointed on the telescopic link 10.

The telescopic rod 10 is made of an insulating hard material, the telescopic rod 10 is composed of two pipe bodies which are sleeved in a sliding mode, the two ends of the spring 11 are fixedly connected to the two pipe bodies respectively, the electric connection elastic piece 9 is made of a copper metal material, one side, close to the mounting plate 6, of the electric connection elastic piece 9 is of a bending structure, and an insulating plug board 7 is arranged on one side of the connection position of the two electric connection elastic pieces 9.

The insulating insertion plate 7 is made of an insulating hard material, the insulating insertion plate 7 is fixedly connected to the mounting plate 6, and the connecting part, close to the electric connection elastic sheet 9, of the insulating insertion plate 7 is of a pointed structure.

Go up shell 1 and lower shell 2 and remove shell 3 junction and all be provided with joint strip 12, joint strip 12 rigid coupling is on

last shell

1 and 2 inside walls of lower shell, and joint strip 12 closely laminates with the lateral wall that removes shell 3.

The distance between the connecting part of the insulating insertion plate 7 and the two electric connection elastic pieces 9 is equal to the single-stroke distance of the screw hoist 13, namely, the distance between the connecting part of the insulating insertion plate 7 and the two electric connection elastic pieces 9 on one side is equal to the limit distance of the single-stroke movement of the screw hoist 13 in the state that the screw hoist 13 does not work normally.

When the screw rod hoist is used, the electrical elements in the screw rod hoist are externally connected and communicated with a power supply and a control switch when in use, and after the screw rod hoist 13 is started, the threaded rod 5 on the screw hoist 13 moves up and down to hoist the gate, the threaded rod 5 drives the two limit plates 14 to move synchronously in the moving process, when the threaded rod 5 moves upwards, the limiting plate 14 is driven to move upwards, the limiting plate 14 at the bottom drives the movable shell 3 to move, thereby driving the insulating plug board 7 on the mounting board 6 at the top to move towards one side of the electric connection component inside the upper shell 1, when the threaded rod 5 exceeds the travel limit in the upward moving process, the insulating insertion plate is inserted between the two electric connection elastic sheets 9, the telescopic rod 10 contracts, and the two electric connection elastic sheets 9 which are mutually attached are separated by the insulating insertion plate, so that a power supply circuit of the screw hoist 13 is disconnected, and the screw hoist 13 is forced to stop.

When the threaded rod 5 moves downwards, the limiting plate 14 positioned at the top drives the movable shell 3 to move, so that the insulating plug board 7 positioned on the mounting board 6 at the bottom is driven to move towards one side of the electric connection assembly positioned inside the lower shell 2, when the threaded rod 5 exceeds the stroke limit in the downward moving process, the insulating plug board is inserted between the two electric connection elastic sheets 9, the telescopic rod 10 contracts, the two electric connection elastic sheets 9 which are mutually attached are separated by the insulating plug board, so that a power supply circuit of the screw hoist 13 is disconnected, and the screw hoist 13 is forced to stop.

When screw hoist 13's stroke was too big, can install upper casing 1 and lower shell 2 respectively fixedly on top and the bottom, it is inconvenient with 2 inner structure of lower shell to go up shell 1, will remove shell 3 and become two, two remove shell 3 respectively with upper casing 1 with lower shell 2 cooperation use, spacing at the surface of threaded rod 5 with mounting panel 6 through limiting plate 14, realize the outage.

The application has the advantages that:

1. the power supply circuit of the screw hoist is controlled to be disconnected by the insulating insertion plate which can move up and down synchronously along with the threaded rod, namely when the threaded rod exceeds a limit stroke in the moving process, the power of the screw hoist can be directly cut off, and the over-limit protection of the screw hoist is realized;

2. this application is rational in infrastructure, and top and bottom are provided with the electric subassembly that connects of two sets of symmetries respectively, and single connects the insulating plugboard that the electric subassembly cooperation corresponds, can play the double insurance, avoids appearing when the threaded rod surpasss the condition that the screw hoist was not cut off the power supply after the extreme stroke at the in-process that removes, has improved protection device's reliability, can realize the spacing protection of crossing of two directions of motion of threaded rod simultaneously.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The utility model provides a screw rod headstock gear crosses spacing protection device which characterized in that: including last shell (1) and lower shell (2) and connect connecting piece (4) between last shell (1) and lower shell (2), go up shell (1) rigid coupling on the casing of screw hoist (13), and threaded rod (5) on screw hoist (13) pass shell (1), removal shell (3) and lower shell (2) in proper order, threaded rod (5) rigid coupling has two limiting plates (14) on the surface, two limiting plates (14) overlap joint with one of them mounting panel (6) respectively, two mounting panel (6) rigid coupling respectively on the inner wall of removal shell (3), the top and the bottom of removal shell (3) respectively with the inner wall sliding connection of last shell (1) and lower shell (2), two limiting plates (14) are located two mounting panels (6) one side in opposite directions respectively, one side of two mounting panels (6) all is provided with two and connects the electric assembly, the inner cavities of the upper shell (1) and the lower shell (2) are respectively provided with an electricity connection assembly, and an electricity connection elastic sheet (9) in the electricity connection assembly is connected in series into a power supply circuit of the screw hoist (13).

2. The over-limit protection device of the screw hoist according to claim 1, characterized in that: lie in two of mounting panel (6) one side connect the electric subassembly to use threaded rod (5) to set up as symmetry axis symmetry, connect the electric subassembly to include mounting bracket (8), connect electric shell fragment (9), telescopic link (10) and spring (11), mounting bracket (8) rigid coupling is on last shell (1) or lower shell (2) inside wall, the symmetry is provided with two telescopic links (10) on mounting bracket (8), and the rigid coupling has electric shell fragment (9) of connecting that closely laminates each other on the tip of two telescopic links (10), spring (11) have been cup jointed on telescopic link (10).

3. The over-limit protection device of the screw hoist according to claim 2, characterized in that: the telescopic link (10) is made by insulating hard material, telescopic link (10) comprises two pipe bodys that slide each other and cup joint, the both ends of spring (11) rigid coupling respectively is on two pipe bodys, connect electric shell fragment (9) to be made by copper metal material, and connect electric shell fragment (9) one side near mounting panel (6) and be the bending structure, and two connect electric shell fragment (9) junction one side and be provided with insulating plugboard (7).

4. The over-limit protection device of the screw hoist according to claim 3, characterized in that: the insulating plug board (7) is made of an insulating hard material, the insulating plug board (7) is fixedly connected to the mounting plate (6), and the joint of the insulating plug board (7) close to the electric connection elastic sheet (9) is of a tip structure.

5. The over-limit protection device of the screw hoist according to claim 1, characterized in that: go up shell (1) and lower shell (2) and remove shell (3) junction and all be provided with joint strip (12), joint strip (12) rigid coupling is on last shell (1) and lower shell (2) inside wall, and joint strip (12) and the lateral wall of removing shell (3) closely laminate.

6. The over-limit protection device of the screw hoist according to claim 3, characterized in that: the distance between the connecting part of the insulating insertion plate (7) and the two electric contact spring pieces (9) is equal to the single-stroke distance of the screw hoist (13).