CN217234001U

CN217234001U - Stroke mechanical limit switch for hydraulic hoist

Info

Publication number: CN217234001U
Application number: CN202123226840.4U
Authority: CN
Inventors: 王婧; 彭雄斌
Original assignee: Jiangsu Longcheng Honghui Hydraulic Electromechanical Co ltd
Current assignee: Jiangsu Longcheng Honghui Hydraulic Electromechanical Co ltd
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2022-08-19
Anticipated expiration: 2031-12-21

Abstract

The utility model discloses a stroke machinery limit switch for hydraulic hoist, including travel switch body, protection casing, feeler lever and feeler lever. The beneficial effects of the utility model are that: the utility model discloses an at the inside lubricating oil pocket that sets up of both sides lateral wall of protection head, when using, lubricating oil takes out through the surface of lubricated oiling ball and scribbles on the feeler lever, can guarantee the gliding lubricated effect of feeler lever, reduces the trouble that the card went up to appear, thereby can guarantee that this travel switch can normal operating, the utility model discloses a shell surface at the travel switch body is provided with insulating waterproof coating, has improved its safety in utilization performance, and the both sides of normally open contact and normally closed contact extend to the both sides lateral wall of travel switch body to be connected with terminal one and two electricity of terminal respectively, arrange the switch lateral wall in with the terminal, be convenient for wiring when using, improve the installation effectiveness.

Description

Stroke mechanical limit switch for hydraulic hoist

Technical Field

The utility model relates to a travel switch specifically is a travel machinery limit switch for hydraulic hoist belongs to the switch technology field.

Background

The travel limit switch is a control switch which achieves a certain control purpose by utilizing the action of a contact of a mechanical motion part produced by collision to connect or disconnect a control circuit, is commonly used on a hydraulic hoist and realizes the connection and short circuit control of the operation of the hydraulic hoist.

The existing travel limit switch has some problems when in use:

1) the existing travel limit switch has certain disadvantages in use, and after the existing travel limit switch is used for a long time, the contact rod is easy to be blocked, so that the control effect of the existing travel limit switch is influenced, and certain adverse effects are caused;

2) the safety in utilization of current travel limit switch is lower, and the terminal that electrocutes moreover is located inside the switch body, and when using, the protective cover often need be opened, wiring, and it is more troublesome to use.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a stroke machinery limit switch for hydraulic hoist in order to solve above-mentioned problem.

The utility model discloses a following technical scheme realizes above-mentioned purpose: comprises that

The travel switch comprises a travel switch body, wherein one end of the travel switch body is provided with a protective head, the periphery of the protective head is provided with a thread groove, a fixing screw is connected with the thread groove in an internal thread manner, and the protective head is fixedly connected with one end of the travel switch body through the matching action between the thread groove and the fixing screw;

the outer edge of the protective cover is provided with a mounting hole, a fastening bolt is connected in the mounting hole in a threaded manner, and the protective cover is connected with the shell of the travel switch body through the fastening bolt;

the contact rod is arranged in a sliding groove formed in the protective head in a sliding manner, and the lower end of the contact rod extends into the travel switch body;

the travel switch limiting assembly is arranged inside a fixed plate arranged inside the travel switch body, a mounting groove is formed in the fixed plate, and the travel switch limiting assembly is arranged, so that the hydraulic hoist can be controlled to be powered on or powered off conveniently according to actual operation conditions.

As the utility model discloses further scheme again: and a sealing gasket ring is arranged at the joint of the protective cover and the shell of the travel switch body.

As a further aspect of the present invention: travel switch spacing subassembly comprises normally open contact and the normally closed contact of installing on the fixed plate, normally open contact installs establish mounting groove's upside in the fixed plate, and the normally closed contact is installed mounting groove's downside is established in the fixed plate, be provided with the connecting plate between normally open contact and the normally closed contact, and the bilateral symmetry of connecting plate is provided with movable contact, the upper surface central point of connecting plate puts the rigid coupling and has to support the depression bar, and supports the upper end rigid coupling of depression bar and have a support piece, the upside of support piece and the lower extreme contact of feeler lever, the lower surface central point of connecting plate puts fixed mounting and has the stopper, and the lower extreme of stopper has cup jointed compression spring.

As a further aspect of the present invention: the both sides symmetry of stopper installs the briquetting, and the downside lateral wall and the compression spring rigid coupling of briquetting.

As a further aspect of the present invention: the inside lubricating oil chamber that is provided with of both sides lateral wall of guard head, and the outside of lubricating oil chamber is provided with the sealing plug, the inside of lubricating oil chamber is provided with the cotton piece of oil storage, and the one end of the cotton piece of oil storage is connected with lubricated oiling ball.

As a further aspect of the present invention: and an insulating waterproof coating is arranged on the surface of the shell of the travel switch body.

As a further aspect of the present invention: two sides of the normally open contact and the normally closed contact extend to side walls of two sides of the travel switch body and are respectively and electrically connected with a binding post I and a binding post II.

The utility model has the advantages that:

1) the lubricating oil cavities are arranged in the side walls on the two sides of the protective head, when the travel switch is used, lubricating oil is brought out through the surface of the lubricating oil ball and coated on the contact rod, the sliding lubricating effect of the contact rod can be ensured, and the blocking faults are reduced, so that the travel switch can be ensured to normally operate;

2) the utility model discloses a shell surface at the travel switch body is provided with insulating waterproof coating, has improved its safety in utilization performance, and the both sides of normally open contact and normally closed contact extend to the both sides lateral wall of travel switch body moreover to be connected with terminal one and two electricity of terminal respectively, arrange the switch lateral wall in with the terminal, be convenient for work a telephone switchboard when using, improve the installation effectiveness.

Drawings

Fig. 1 is a schematic view of the travel switch of the present invention;

fig. 2 is a schematic side view of the travel switch of the present invention;

FIG. 3 is a schematic view of the internal connection structure of the travel switch of the present invention;

fig. 4 is an enlarged schematic view of a portion a in fig. 3.

In the figure: 1. travel switch body, 2, protection head, 3, thread groove, 4, set screw, 5, protection cover, 6, fastening bolt, 7, lubrication oil ball, 8, sealing backing ring, 9, feeler lever, 10, terminal I, 11, terminal II, 12, pressing block, 13, pressing rod, 14, fixed plate, 15, normally open contact, 16, normally closed contact, 17, connecting plate, 18, movable contact, 19, stopper, 20, compression spring, 21, pressing block, 22, lubricating oil cavity, 23, sealing plug.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example one

Referring to fig. 1 to 4, a stroke mechanical limit switch for a hydraulic hoist includes

The travel switch comprises a travel switch body 1, wherein a protective head 2 is installed at one end of the travel switch body 1, thread grooves 3 are formed in the periphery of the protective head 2, fixing screws 4 are connected to the thread grooves 3 in an internal thread mode, and the protective head 2 is fixedly connected with one end of the travel switch body 1 through the matching effect between the thread grooves 3 and the fixing screws 4;

the protection cover 5 is provided with a mounting hole at the outer edge, a fastening bolt 6 is connected in the mounting hole in a threaded manner, and the protection cover 5 is connected with the shell of the travel switch body 1 through the fastening bolt 6;

the contact rod 9 is arranged in a sliding groove formed in the protective head 2 in a sliding manner, and the lower end of the contact rod extends into the travel switch body 1;

the limit component of the travel switch is arranged inside a fixing plate 14 arranged inside the travel switch body 1, a mounting groove is formed in the fixing plate 14, and the limit component of the travel switch is arranged, so that the hydraulic hoist can be controlled to be powered on or powered off conveniently according to actual running conditions.

In the embodiment of the present invention, the limit component of the travel switch is composed of a normally open contact 15 and a normally closed contact 16 which are installed on a fixing plate 14, the normally open contact 15 is installed on the upper side of an installation groove in the fixing plate 14, the normally closed contact 16 is installed on the lower side of the installation groove in the fixing plate 14, a connecting plate 17 is arranged between the normally open contact 15 and the normally closed contact 16, and movable contacts 18 are symmetrically arranged on both sides of the connecting plate 17, a pressing rod 13 is fixedly connected to the center of the upper surface of the connecting plate 17, a pressing block 12 is fixedly connected to the upper end of the pressing rod 13, the upper side of the pressing block 12 contacts with the lower end of a contact rod 9, a limit block 19 is fixedly installed to the center of the lower surface of the connecting plate 17, a compression spring 20 is sleeved on the lower end of the limit block 19, when the machine is not in place during use, the movable contact 18 contacts with the normally open contact 15, the hydraulic hoist is electrified to run stably, after the hydraulic hoist runs to a certain position, the contact rod 9 is extruded by the hydraulic hoist, the abutting block 12 is extruded inwards by the contact rod 9, the abutting block 12 then extrudes the abutting rod 13, the connecting plate 17 then extrudes the compression spring 20, the movable contact 18 on the lower side of the connecting plate 17 is contacted with the normally closed contact 16, and power failure is achieved so that the hydraulic hoist is controlled to stop running.

In the embodiment of the utility model, briquetting 21 is installed to stopper 19's bilateral symmetry, and briquetting 21's downside lateral wall and compression spring 20 rigid coupling, is convenient for realize this travel switch's break-make through compression spring 20's spring action.

The embodiment of the utility model provides an in, inside lubricating oil chamber 22 that is provided with of both sides lateral wall of protection head 2, and lubricating oil chamber 22's the outside is provided with sealing plug 23, lubricating oil chamber 22's inside is provided with the cotton piece of oil storage, and the one end of the cotton piece of oil storage is connected with lubricated oiling ball 7, and lubricating oil is taken out through the surface of lubricated oiling ball 7 and is smeared on feeler lever 9, can guarantee the gliding lubricated effect of feeler lever 9, reduces the trouble that the card went to appear.

Example two

Referring to fig. 1 to 4, a stroke mechanical limit switch for a hydraulic hoist comprises

the travel switch limiting assembly is arranged inside a fixing plate 14 installed inside the travel switch body 1, a mounting groove is formed in the fixing plate 14, and the travel switch limiting assembly is arranged, so that the hydraulic hoist can be controlled to be powered on or powered off conveniently according to actual running conditions.

The embodiment of the utility model provides an in, the junction of protection casing 5 and travel switch body 1's casing is provided with sealing gasket ring 8, is convenient for improve the leakproofness of connecting between the two, avoids when using, and the switch is inside to be dampened and takes place the short circuit.

The embodiment of the utility model provides an in, this travel switch body 1's housing face is provided with insulating waterproof coating, is convenient for improve its safety in utilization performance.

In the embodiment of the utility model, the both sides of normally open contact 15 and normally closed contact 16 extend to the both sides lateral wall of travel switch body 1 to the difference electricity is connected with terminal one 10 and terminal two 11, and convenient to use person connects convenient operation.

The working principle is as follows: when the stroke mechanical limit switch for the hydraulic hoist is used, the stroke switch is firstly installed, then the switch is electrically connected with the hydraulic hoist through the first binding post 10 and the second binding post 11, when the machine is not operated in place, the movable contact 18 is contacted with the normally open contact 15, so that the hydraulic hoist is electrified and stably operated, when the machine is operated to a certain position, the hydraulic hoist extrudes the contact rod 9, so that the contact rod 9 extrudes the abutting block 12 inwards, the abutting block 12 then extrudes the abutting rod 13, so that the connecting plate 17 further extrudes the compression spring 20, so that the movable contact 18 on the lower side of the connecting plate 17 is contacted with the normally closed contact 16, the power failure is realized, and the hydraulic hoist is controlled to stop operation, in the use process, the lubricating oil in the lubricating oil cavity 22 is taken out through the surface of the lubricating oil injection ball 7 and smeared on the contact rod 9, and the sliding lubricating effect of the contact rod 9 can be ensured, the fault that the card went on is reduced to guarantee that travel switch can the steady operation, be provided with insulating waterproof coating on the casing surface of this travel switch body 1 moreover, improved its safety in utilization performance.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A stroke machinery limit switch for hydraulic hoist, characterized by, include

The travel switch comprises a travel switch body (1), wherein a protective head (2) is mounted at one end of the travel switch body, thread grooves (3) are formed in the periphery of the protective head (2), fixing screws (4) are connected to the thread grooves (3) in an internal thread mode, and the protective head (2) is fixedly connected with one end of the travel switch body (1) through the matching effect between the thread grooves (3) and the fixing screws (4);

the outer edge of the protective cover (5) is provided with a mounting hole, a fastening bolt (6) is connected in the mounting hole in a threaded manner, and the protective cover (5) is connected with the shell of the travel switch body (1) through the fastening bolt (6);

the contact rod (9) is arranged in a sliding groove formed in the protective head (2) in a sliding mode, and the lower end of the contact rod extends into the travel switch body (1);

the limit assembly of the travel switch is arranged inside a fixed plate (14) installed inside the travel switch body (1), a mounting groove is formed in the fixed plate (14), and the limit assembly of the travel switch is arranged, so that the hydraulic hoist can be controlled to be powered on or powered off conveniently according to actual running conditions.

2. The mechanical limit switch of stroke for hydraulic hoist of claim 1, characterized in that: and a sealing gasket ring (8) is arranged at the joint of the protective cover (5) and the shell of the travel switch body (1).

3. The mechanical limit switch of stroke for hydraulic hoist of claim 1, characterized in that: the limit component of the travel switch is composed of a normally open contact (15) and a normally closed contact (16) which are arranged on a fixed plate (14), the normally open contact (15) is arranged on the upper side of the mounting groove arranged in the fixing plate (14), and the normally closed contact (16) is arranged at the lower side of the mounting groove arranged in the fixed plate (14), a connecting plate (17) is arranged between the normally open contact (15) and the normally closed contact (16), and movable contacts (18) are symmetrically arranged at two sides of the connecting plate (17), a pressing rod (13) is fixedly connected at the center of the upper surface of the connecting plate (17), the upper end of the pressing rod (13) is fixedly connected with a pressing block (12), the upper side of the pressing block (12) is contacted with the lower end of the feeler lever (9), the lower surface central point of connecting plate (17) puts fixed mounting has stopper (19), and the lower extreme of stopper (19) has cup jointed compression spring (20).

4. The mechanical limit switch of stroke for hydraulic hoist of claim 3, characterized in that: the two sides of the limiting block (19) are symmetrically provided with pressing blocks (21), and the side wall of the lower side of each pressing block (21) is fixedly connected with a compression spring (20).

5. The mechanical limit switch of stroke for hydraulic hoist of claim 1, characterized in that: the inside lubricating oil chamber (22) that is provided with of both sides lateral wall of guard head (2), and the outside of lubricating oil chamber (22) is provided with sealing plug (23), the inside of lubricating oil chamber (22) is provided with the cotton piece of oil storage, and the one end of the cotton piece of oil storage is connected with lubricated oiling ball (7).

6. The mechanical limit switch of stroke for hydraulic hoist of claim 1, characterized in that: the surface of the shell of the travel switch body (1) is provided with an insulating waterproof coating.

7. The mechanical limit switch of the stroke for the hydraulic hoist according to claim 3, characterized in that: the two sides of the normally open contact (15) and the normally closed contact (16) extend to the side walls of the two sides of the travel switch body (1) and are respectively and electrically connected with a first binding post (10) and a second binding post (11).