CN211945926U - Opening and closing mechanism of mechanical clamp for elevator installation - Google Patents

Abstract

The utility model discloses an elevator installation is with switching mechanism of mechanical clamp, which comprises a housin, the switching pole, two round pin axles and base, switching pole along switching pole circumference equidistance on the switching pole of dead bolt groove below is equipped with four spacing grooves, install a non return piece on the casing in the spacing groove outside, non return piece and spacing groove have constituted the mechanical structure who prevents switching pole reversal, the last spring of plug screw pole forms the support to the non return round pin, make the non return round pin support all the time on switching pole's pole body circumference, and imbed the spacing inslot when the turning point department that the round pin axle is located the cell wall trough, because the blockking of spacing groove right side cell wall, make switching pole can't reverse, then the round pin axle can not retreat and then smooth slip to the exact position yet, guarantee from this that switching pole can only unidirectional rotation, switching mechanism job stabilization nature has been improved.

Description

Opening and closing mechanism of mechanical clamp for elevator installation

Technical Field

The utility model relates to an elevator installation hoisting equipment especially relates to an elevator installation is with switching mechanism of mechanical clamp.

Background

During elevator installation, slab lifting devices are typically used to lift slabs. The slab clamping equipment is mainly divided into two categories according to the working principle: mechanical clips and electrical clips. The mechanical clamp is not driven by any electrical equipment, and the opening and closing of the clamp arms are realized by locking and separating the opening and closing mechanism and the middle beam by means of dead weight during working, so that the clamp at the end part of the clamp arm clamps the plate blank.

The conventional opening and closing mechanism structure is shown in fig. 1 and 2, and comprises a housing 1 ', an opening and closing rod 2', two pin shafts 3 'and a base 4', wherein the upper end of the housing 1 'is fixedly connected with a suspension arm (not shown) of a clamp, the upper end 21' of the opening and closing rod 2 'is vertically and movably inserted into the housing 1', the lower end 22 'of the opening and closing rod is provided with a positioning block (not shown), the upper end 21' of the opening and closing rod 2 'is circumferentially provided with a latch groove 24', the two pin shafts 3 'are symmetrically arranged at two sides of the housing 1', the shaft end of each pin shaft 3 'horizontally penetrates through the housing 1' until touching the groove bottom 241 'of the latch groove 24', the upper groove wall 242 'of the latch groove 24' is contacted with the side surface of the pin shaft 3 'when no external force is applied, and a movable gap exists between the upper end 21' of the opening and; the edges of the upper groove wall 242 'and the lower groove wall 243' of the lock tongue groove 24 'are distributed in four continuous wave bands with the same wave shape along the circumferential direction of the opening and closing rod, the wave bands of the two groove walls are slightly staggered and symmetrical along the horizontal center line of the lock tongue groove, the wave crest of the lower groove wall 243' lags behind the wave trough of the upper groove wall 242 'by one phase, and any vertical distance between the upper groove wall and the lower groove wall is limited by ensuring that the shaft end of the pin shaft 3' can slide from any wave crest 2421 'of the upper groove wall 242' to the wave trough 2431 'of the lower groove wall 243' below the shaft end; the base 4 ' is fixedly arranged on a cross beam (not shown) below the suspension arm, a positioning groove 41 ' is formed in the surface of the base 4 ', the height of the positioning groove 41 ' is larger than the thickness of the positioning block, when no external force acts, the positioning block 23 ' at the lower end of the opening and closing rod 2 ' is embedded in the positioning groove 41 ', and the upper surface of the positioning block 23 ' is clamped in a notch of the positioning groove 41 '. Chinese patent No. 201520810746.9 discloses the operation principle of a conventional opening and closing mechanism, when the clamp is raised, the opening and closing rod is rotated by 90 ° once it is dropped, the head (i.e. the positioning block) is changed from the original horizontal direction to the vertical direction, the automatic opening and closing rod is separated from the cross beam of the clamp, and the plate blank is carried; when the carried slab is placed at a designated place, the opening and closing rod automatically rotates for 90 degrees again to close, and the cross beam is locked. Through switching pole touching constant head tank bottom, the round pin axle forces switching pole rotatory in the spring bolt, is the regular rotation along the angle distribution moreover, makes switching pole and crossbeam automatic disengagement or pin, control clamp circulation work.

However, in the actual use process of the opening and closing mechanism of the mechanical clamp for installing the elevator, at the end of the service life, due to the abrasion of the profile surface of the lock tongue groove, particularly, the trough part of the upper groove wall gradually becomes dull, the curvature radius of the trough is increased, and even the trough part is locally linear, after the pin shaft is abutted against a certain trough of the upper groove wall, the pin shaft returns to the initial position along the profile surface abraded by the trough if being vibrated, so that the opening and closing rod is reversed, and the clamp cannot be normally opened or closed. Therefore, there is a need for an improved opening and closing mechanism for mechanical pliers.

Disclosure of Invention

An object of the utility model is to provide a prevent switching mechanism of mechanical clamp for elevator installation that switching pole reversed.

Realize the utility model discloses the technical scheme of purpose is: the opening and closing mechanism of the mechanical clamp for installing the elevator comprises a shell, an opening and closing rod, two pin shafts and a base, wherein the opening of the shell faces downwards, the inner cavity of the shell is a cylindrical cavity, the opening and closing rod is cylindrical, the upper end of the shell is fixedly connected with a suspension arm of the clamp, the upper end part of the opening and closing rod vertically and movably penetrates through the shell, the lower end part of the opening and closing rod is connected with a positioning block, a lock tongue groove is formed in the upper end part of the opening and closing rod along the circumferential direction of the opening and closing rod, the two pin shafts are symmetrically arranged on two sides of the shell, the shaft end of each pin shaft horizontally penetrates through the shell and extends into the lock tongue groove, the upper groove wall of the lock tongue groove is contacted; the edges of the upper groove wall and the lower groove wall of the lock tongue groove are distributed in four continuous wave bands with the same wave form along the circumferential direction of the opening and closing rod, the wave bands of the two groove walls are slightly staggered and symmetrical along the horizontal central line of the lock tongue groove, the wave crest of the lower groove wall lags behind the wave trough of the upper groove wall by one phase, and any vertical distance between the upper groove wall and the lower groove wall is limited by ensuring that the shaft end of the pin shaft can slide from any wave crest of the upper groove wall to the wave trough of the lower groove wall below the shaft end; the base is fixedly arranged on the cross beam below the suspension arm, a positioning groove is formed in the surface of the base, and the height of the positioning groove is larger than the thickness of the positioning block; four limit grooves are arranged on the opening and closing rod below the lock tongue groove at equal intervals along the circumferential direction of the opening and closing rod, the groove body of each limit groove is formed by enclosing a bottom wall, an upper wall, a right wall and a lower wall, the bottom wall is perpendicular to the right wall, the extension line of the center line of the right wall passes through the circle center of the circumference where the bottom wall and the right wall are located, and each right wall is opposite to the left side of the inflection point of the wave trough of one upper groove wall; install a non return spare on the casing in the spacing groove outside, the non return spare includes plug screw and the non return round pin that the level order set up, and the plug screw is installed a spring in the pole body between head end to the plug screw nut of non return round pin, and the free end of non return round pin is worn to establish the casing and supports the pole body of switching pole inwards the level, and the reduction length of spring is limited with the diapire ability contact of guaranteeing non return round pin and the spacing groove of switching pole, the nut and the casing fixed connection of plug screw.

The utility model discloses constitute the mechanical structure who prevents switching pole and reverse by non return spare and spacing groove, the last spring of plug screw pole forms the support to the non return round pin, make the non return round pin press all the time on switching pole's pole body circumference, and imbed the spacing inslot when the turning point department of selling the position of the last cell wall trough, because the blockking of the cell wall of spacing groove right side, make switching pole can't reverse, then the round pin axle can not retreat and then smooth slip to correct position yet, guarantee from this that switching pole can only unidirectional rotation, the stability of switching mechanism work has been improved.

Drawings

Fig. 1 is a schematic view of a partial perspective structure of an opening and closing mechanism of a mechanical clamp for installing an elevator in the background art of the present invention;

fig. 2 is a schematic plan view of a lock tongue groove according to the background art of the present invention;

fig. 3 is a schematic front view of the opening and closing mechanism according to the embodiment of the present invention in the initial state;

FIG. 4 is a sectional view taken along line A-A of FIG. 3;

fig. 5 is a schematic top view of the opening and closing mechanism of the mechanical clamp for installing an elevator according to the embodiment of the present invention;

FIG. 6 is a sectional view taken along line B-B of FIG. 5;

fig. 7 is a perspective view of the opening and closing mechanism of the embodiment of the present invention in an initial state without the housing;

fig. 8 is a schematic structural view of the embodiment of the present invention, in which the check pin is embedded into the limit groove after the casing is hidden.

Wherein the arrow represents the rotation direction of the opening and closing lever.

Detailed Description

The following description of the preferred embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in fig. 3 to 7, an opening and closing mechanism of a mechanical clamp for elevator installation comprises a housing 1, an opening and closing rod 2, two pin shafts 3 and a base 4, wherein the opening of the housing 1 faces downward, the inner cavity of the housing 1 is a cylindrical cavity, the opening and closing rod 2 is a cylinder, the upper end of the housing 1 is fixedly connected with a suspension arm (not shown) of the clamp, an upper end 21 of the opening and closing rod 2 vertically and movably penetrates through the housing 1, a lower end 22 of the opening and closing rod is connected with a positioning block 23, a latch groove 24 is formed in the upper end 21 of the opening and closing rod 2 along the circumferential direction of the opening and closing rod, the two pin shafts 3 are symmetrically installed on two sides of the housing 1, the shaft end of each pin shaft 3 horizontally penetrates through the housing 1 and extends into the latch groove 24, when no external force acts, an upper groove wall 242 of the latch groove 24 is in contact with the side surface of the; the edges of the upper groove wall 242 and the lower groove wall 243 of the lock tongue groove 24 are distributed in four continuous wave bands with the same wave shape along the circumferential direction of the opening and closing rod, the wave bands of the two groove walls are slightly staggered and symmetrical along the horizontal center line of the lock tongue groove, the wave crest of the lower groove wall lags behind the wave trough of the upper groove wall by one phase, and any vertical distance between the upper groove wall and the lower groove wall is limited by ensuring that the shaft end of the pin shaft 3 can slide from any wave crest 2421 of the upper groove wall 242 to the wave trough 2431 of the lower groove wall 243 below the shaft end; the base 4 is fixedly arranged on a cross beam (not shown) below the suspension arm, a positioning groove 41 is formed in the surface of the base 4, and the height H of the positioning groove 41 is greater than the thickness H of the positioning block; four limiting grooves 25 are arranged on the opening and closing rod 2 below the bolt groove 24 at equal intervals along the circumferential direction of the opening and closing rod 2, the groove body of each limiting groove 25 is formed by enclosing a bottom wall 251, an upper wall 252, a right wall 253 and a lower wall 254, the bottom wall 251 and the right wall 253 are vertically arranged, the extension line of the center line of the right wall 253 passes through the circle center of the circumference where the bottom wall 251 and the right wall 253 are arranged, and each right wall 253 is opposite to the left side of the inflection point a of the wave trough 2431 of one upper groove wall; install a non return piece 5 on the casing 1 outside the spacing groove 25, non return piece 5 includes plug screw 52 and the non return pin 51 that the level order set up, a spring 53 is installed on plug screw 52 in the pole body between head end 511 of non return pin 51 to the nut 521 of plug screw 52, the free end of non return pin 51 is worn to establish casing 1 and is supported the pole body of opening and closing rod 2 inwards horizontally, the reduction length of spring 53 is limited in order to guarantee that the contact of bottom wall 251 of stop pin 51 and the spacing groove 25 of opening and closing rod can, the nut 521 and the casing 1 fixed connection of plug screw 52.

When the opening and closing rod 2 moves downwards along with the suspension arm (not shown) and touches the bottom of the positioning groove 41, the shell 1 continues to move upwards under the pressure of the suspension arm, so that the pin shaft 3 slides from the peak of the upper groove wall 242 to the peak of the lower groove wall 243 along the lock tongue groove 24 and touches the peak of the lower groove wall 243, the pin shaft 3 is forced to push the opening and closing rod to rotate anticlockwise by 45 degrees under the friction force of the lower groove wall 242 in the moving process, a limiting groove 25 rotates to the position of the check pin 51 along with the opening and closing rod 2, at the moment, the check pin 51 is embedded into the limiting groove 25, then the suspension arm lifts the shell 1 so that the opening and closing rod 2 is gradually separated from the bottom of the positioning groove 41 and; as shown in fig. 8, when the pin shaft 3 slides from the peak of the lower groove wall 243 to the left side of the inflection point a of the trough of the upper groove wall 242, the check pin 51 is embedded into the limit groove 25, and due to the blocking of the right wall 253 of the limit groove 25, the opening and closing rod 2 cannot be reversed at this time, the pin shaft 3 cannot retreat, and the pin shaft slides into the peak on the left side of the initial position and forcibly pushes the opening and closing rod to continue rotating counterclockwise by 45 °, so that the positioning block of the opening and closing rod 2 smoothly comes out from the notch of the positioning groove 41.

The fixed connection mode of the head end of the screw plug rod and the shell can be welding or interference fit, and the spring on the screw plug rod supports the non-return pin, so that the non-return pin is pressed on the circumference of the rod body of the opening and closing rod all the time; the wave form of two cell walls of lock tongue groove is decided by the pipe diameter size, as long as satisfy along the circumference distribution of switching pole have four continuous the same wave bands of shape can guarantee that the round pin axle rotates 90 from the crest of an last cell wall through the trough of lower cell wall when the left side crest department of the crest of cell wall on the initial position again.

The above only be the embodiment of the utility model discloses a not consequently restriction the patent scope of the utility model, all utilize the equivalent flow transform that the content of the specification was made, or direct or indirect application is in other relevant technical field, all including on the same reason the utility model discloses a patent protection within range.

Claims (1)

1. The opening and closing mechanism of the mechanical clamp for installing the elevator comprises a shell, an opening and closing rod, two pin shafts and a base, wherein the opening of the shell faces downwards, the inner cavity of the shell is a cylindrical cavity, the opening and closing rod is cylindrical, the upper end of the shell is fixedly connected with a suspension arm of the clamp, the upper end part of the opening and closing rod vertically and movably penetrates through the shell, the lower end part of the opening and closing rod is connected with a positioning block, a lock tongue groove is formed in the upper end part of the opening and closing rod along the circumferential direction of the opening and closing rod, the two pin shafts are symmetrically arranged on two sides of the shell, the shaft end of each pin shaft horizontally penetrates through the shell and extends into the lock tongue groove, the upper groove wall of the lock tongue groove is contacted; the edges of the upper groove wall and the lower groove wall of the lock tongue groove are distributed in four continuous wave bands with the same wave form along the circumferential direction of the opening and closing rod, the wave bands of the two groove walls are slightly staggered and symmetrical along the horizontal central line of the lock tongue groove, the wave crest of the lower groove wall lags behind the wave trough of the upper groove wall by one phase, and any vertical distance between the upper groove wall and the lower groove wall is limited by ensuring that the shaft end of the pin shaft can slide from any wave crest of the upper groove wall to the wave trough of the lower groove wall below the shaft end; base fixed mounting has seted up a constant head tank on the crossbeam of davit below, the surface of base, the thickness that highly is greater than the locating piece of constant head tank, its characterized in that: four limit grooves are arranged on the opening and closing rod below the lock tongue groove at equal intervals along the circumferential direction of the opening and closing rod, the groove body of each limit groove is formed by enclosing a bottom wall, an upper wall, a right wall and a lower wall, the bottom wall is perpendicular to the right wall, the extension line of the center line of the right wall passes through the circle center of the circumference where the bottom wall and the right wall are located, and each right wall is opposite to the left side of the inflection point of the wave trough of one upper groove wall; install a non return spare on the casing in the spacing groove outside, the non return spare includes plug screw and the non return round pin that the level order set up, and the plug screw is installed a spring in the pole body between the head end of non return round pin to the nut of plug screw, and the free end of non return round pin is worn to establish the casing and supports the pole body of switching pole inwards the level, and the reduction length of spring is limited with the diapire ability contact of guaranteeing non return round pin and the spacing groove of switching pole, the nut and the casing fixed connection of plug screw.

Images