CN211733510U - Progressive safety tongs and guide baffle group, and connecting node structure between slide block and wedge block - Google Patents

Abstract

The guide baffle set of the utility model comprises a front guide baffle and a rear guide baffle and a plurality of roller pins clamped between the two guide baffles in a row; the left side and the right side of each guide separation blade are respectively provided with a guide edge; the front and back end faces of the sliding block and the wedge block are respectively provided with a wedge block guide groove matched with the guide edge of the corresponding side edge of the corresponding guide retaining sheet. Progressive safety tongs have adopted neotype direction stop piece group and slider and the voussoir between connected node structure, can effectively reduce the complete machine volume, and not only helped making up the machining error so that the assembly, can eliminate again spare part because of processing and assembly error cause U type spring from top to bottom open volume inconsistent, have the inclination or about wedge braking face nonparallel scheduling problem between circular bead face and the support spout holding surface about the slider about.

Description

Progressive safety tongs and guide baffle group, and connecting node structure between slide block and wedge block

Technical Field

The utility model belongs to elevator installation device field especially relates to a progressive safety tongs and direction baffle group and connected node structure between U type spring, U type spring and slider connected node structure, slider and the voussoir thereof.

Background

When the elevator falls due to accidents, in order to reduce the damage to the elevator car as much as possible and protect the life and property safety of the passengers, a safety protection device must be arranged on the elevator car, and the core of the safety protection device is safety tongs. The existing safety tongs mainly have two structural forms, one is instantaneous safety tongs, a spring assembly is not arranged, the braking distance of the safety tongs is short, the braking impact force is too large, and the safety tongs are generally not suitable for passenger elevators; the other is a progressive safety gear which is provided with a spring component, and the safety gear has long braking distance and small braking impact force. For example, chinese patent CN2571723Y discloses a progressive safety gear, as shown in fig. 1, which includes a bracket 1 and a U-shaped spring 2, wherein a slide block 3, a needle roller component 4 and a wedge block 5 are respectively installed on left and right sides inside the U-shaped spring 2 from outside to inside, an elevator guide rail is arranged between the two wedge blocks 5 in a penetrating manner, a guide catch 6 is respectively installed on the front and rear end surfaces of each slide block 3, a guide edge 7 of each guide catch 6 is respectively matched with a groove 8 on the front and rear end surfaces of the wedge block 5, a pull rod component 9 is arranged behind the wedge block 5, two positioning screws 10 are respectively installed on the upper and lower end surfaces of the bracket 1, and the positioning screws 10 are respectively retained between the two slide blocks 3; bosses 12 and 13 are respectively arranged at the upper end and the lower end of each sliding block 3, and the positioning screws 10 are respectively blocked on the side surfaces of the bosses 12 and 13 facing the elevator guide rail 11.

The safety tongs have the following problems:

A. when the U-shaped spring provides clamping force, the front extending parts at two sides are outwards opened to form a horn mouth shape, and the output of the clamping force is unstable, so that the braking effect of the safety tongs is seriously influenced;

B. the two side parts of the U-shaped spring, which extend forwards, are respectively provided with only one guide through hole in the middle, one end of the threaded pin shaft penetrates through the guide through hole on the U-shaped spring 2 to be connected with the sliding block 3, and the other end of the threaded pin shaft penetrates through the bracket 1 to be connected with the nut; the structure has the problems that after the safety tongs are assembled, the extending side parts at the two sides of the U-shaped spring are not parallel up and down or the inner side surfaces of the U-shaped spring are not parallel to the braking surface of the wedge block, and the like, so that the test of the clamping force of the spring is influenced, and the braking performance of the safety tongs is also influenced;

C. the slider adopts and is the arc surface towards the side of U type spring protraction lateral part medial surface, and upper and lower arch is the structure of direction, is line contact between arc surface and the U type spring protraction lateral part medial surface, can form certain contained angle when U type spring opens transmission pressure, influences the transmission of U type spring clamping-force, and then influences the braking effect of safety tongs.

D. The wedge block is generally made of rigid materials, destructive damage can be caused to the surface of the guide rail due to high temperature and rapid friction in the braking process, the wedge block cannot be used repeatedly, the braking distance of the safety tongs can be increased along with the increase of the speed, and the safety tongs are time-consuming and labor-consuming to use.

SUMMERY OF THE UTILITY MODEL

The applicant has carried out the improvement of corresponding part, connected node structure to above-mentioned problem, the utility model discloses the protection wherein the connected node structure and corresponding progressive safety tongs between guide flap group, slider and voussoir specifically do:

a guide baffle group is used for progressive safety tongs and is characterized by comprising a front guide baffle plate, a rear guide baffle plate and a plurality of rolling needles clamped between the two guide baffle plates in a row, wherein two ends of a needle shaft of a plurality of rolling needles in proper positions are fixedly connected with the front guide baffle plate and the rear guide baffle plate through fasteners, so that the rolling needles and the two guide baffle plates are integrated; the left side and the right side of each guide blocking piece are respectively provided with a guide edge.

The progressive safety gear comprises a bracket and is characterized in that a guide baffle group is arranged between the sliding block and the wedge block;

the guide baffle group comprises a front guide baffle plate and a rear guide baffle plate and a plurality of rolling pins clamped between the two guide baffle plates in a row, and the two ends of a needle shaft of the plurality of rolling pins at proper positions are fixedly connected with the front guide baffle plate and the rear guide baffle plate through fasteners, so that the rolling pins and the two guide baffle plates are integrated; the left side and the right side of each guide separation blade are respectively provided with a guide edge;

the front end surface and the rear end surface of the wedge block are provided with wedge block guide grooves matched with the guide edges of the corresponding side edges of the corresponding guide retaining pieces;

the front end face and the rear end face of the sliding block are also provided with sliding block guide grooves matched with the guide edges of the corresponding side edges of the corresponding guide retaining pieces.

Preferably, the groove clearance of the slide block guide groove and the wedge block guide groove is larger than the thickness of the guide retaining piece, namely the guide retaining piece is in clearance fit with the slide block guide groove and the wedge block guide groove.

Preferably, the guide baffle of the guide baffle group is also provided with an avoidance opening at the lower part.

The utility model also provides a progressive safety tongs that adopts the connected node structure between foretell direction baffle group, slider and voussoir.

The utility model discloses a progressive safety tongs adopts as above direction baffle group and slider and voussoir within a definite time connected node structure, can effectively reduce the complete machine volume, and had both helped remedying machining error so that the assembly, can eliminate again that spare part has the inclination or controls voussoir braking surface nonparallel scheduling problem about or between circular bead face and the support spout holding surface about opening volume inconsistent, slider about because of processing and assembly error caused U type spring.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic view of a progressive safety gear of the prior art;

fig. 2 is a schematic front view of the progressive safety gear of the present invention;

fig. 3 is a schematic perspective view of the progressive safety gear of the present invention;

fig. 4a and 4b are a schematic top view and a schematic perspective view of an embodiment of a U-shaped spring 200 according to the present invention;

FIG. 4c is a schematic top view of another embodiment of the U-shaped spring 200;

fig. 5 is a schematic perspective view of the progressive safety gear of the present invention with the left slider 300 hidden so as to show the assembling structure of the spherical washer 400;

fig. 6 is a perspective view of the slider 300;

fig. 7 is a perspective view of a spherical washer 400;

fig. 8 is a perspective view of a guide vane set 600;

FIG. 9 is a perspective view of an assembly structure of the drawbar unit and the wedge and the guide stop set on one side;

fig. 10a and 10b are perspective views of the wedge body and the brake plate 506 fitted thereto, respectively.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 2 and fig. 3, the progressive safety gear of the present invention includes a bracket 100 and a U-shaped spring 200, wherein a slide block 300, a guide baffle set 600 and a wedge 500 are respectively installed on the left and right sides of the U-shaped spring 200 from outside to inside, and an elevator guide rail is inserted between the two wedges 500;

as shown in fig. 4a and 4b, the present invention provides a new structure of U-shaped spring 200, which is also called C-shaped spring by the applicant, i.e. in an unstressed state, the two side forward extending side portions 210 extend forward in a direction gradually approaching each other from the tail portion to the front end; preferably, as shown in fig. 4a, the included angle α between the inner side surfaces 211 of the two side forward extending side portions 210 is 8 to 10 degrees, and more preferably, the included angle α is 9 degrees.

When the U-shaped spring with the structure is used for providing clamping force during braking of the safety tongs, the two sides of the spring extend forwards, the side parts are opened outwards, the inclination angle, namely the included angle between the two sides is gradually reduced and approaches to zero, and the force transmission efficiency and stability are greatly enhanced; and when the inner side surface 211 of the safety gear is matched with the sliding block with the common structure, the inner side surface 211 can be in surface contact with the corresponding side surface of the sliding block for a long time, and an improved scheme which is simpler and has low cost and can enhance the braking effect of the conventional safety gear is provided.

As shown in fig. 4a, an included angle β may also exist between the outer side surfaces 212 of the U-shaped spring 200 opposite to the front extending side portions 210, and the included angle β is the same as the included angle α between the inner side surfaces 211;

FIG. 4c shows another construction of the U-shaped spring 200, in which the opposing outer sides 212' of the two forward side portions 210 are parallel, such that the forward side portion 210 of each side increases in thickness from the rear to the front;

as shown in fig. 4b, two guiding through holes 212 respectively located at the upper and lower parts are respectively formed on the front extending side portion 210 of each side, and as shown in fig. 2, 3 and 4, each guiding through hole 212 is correspondingly matched with one threaded pin 110, the outer end of each threaded pin 110 is fixed on a bracket side plate through a nut, and the inner end passes through the guiding through hole 212 of the front extending side portion 210 of the U-shaped spring 200 and extends into a guiding blind hole 310 correspondingly formed on the slider 300; referring to fig. 6, the upper end and the lower end of the slider 300 are respectively provided with a guide protrusion (321, 322), the bracket 100 is correspondingly provided with a guide groove (122 in fig. 5), and the guide protrusion of the slider 300 can slide left and right along the guide groove;

as shown in fig. 5 and 7, a plurality of spherical washers 400 are further interposed between each slider 300 and the corresponding side portion 210 of the U-shaped spring 200, each spherical washer 400 having a top end face 402 in the form of a spherical crown face, a bottom end face 401 in the form of a plane, and a through hole 403 passing through the centers of the top end face 402 and the bottom end face 401; referring to fig. 6, the guiding blind hole 310 of each slider 300 is correspondingly matched with a spherical washer 400, a spherical cap groove 311 matched with a top end surface 402 of the spherical washer 400 is formed at the hole opening of the guiding blind hole 310, a bottom end surface 401 of each spherical washer 400 abuts against an inner side surface of the front extending side portion 210 of the U-shaped spring 200, and the top end surface 402 of the spherical washer 400 abuts against the spherical cap groove 311; when the slider 300 on each side is stressed to horizontally push the front extending side part 210 of the U-shaped spring 200 outwards, the spherical washer 400 rotates along with the two ends of the spring, the planar bottom end surface 401 is always attached to the inner side surface of the front extending side part 210 of the U-shaped spring 200, and the top end surface 402 of the spherical crown surface is always attached to the spherical crown groove 311 of the slider, so that the U-shaped spring is always in surface contact with the slider instead of line contact through the spherical washer 400, and the stability of force transmission is enhanced;

the utility model also provides a guide baffle group 600, as shown in fig. 8, each guide baffle group 600 comprises a front guide baffle 610 and a rear guide baffle 610 and a plurality of rolling needles 620 clamped between the two guide baffles in a row, and the two ends of the needle shaft of the rolling needles 620 at proper positions (such as three positions 621 shown in the figure) are fixedly connected with the front guide baffle 610 and the rear guide baffle 610 through fasteners 621, so that the rolling needles 620 and the two guide baffles 610 form a whole; the left side and the right side of each guide baffle piece 610 are respectively provided with a guide edge 611;

correspondingly, as shown in fig. 10a and 10b, the front and rear end faces of the wedge 500 are provided with wedge guide grooves 508 which are matched with the guide edges 611 corresponding to the side edges of the guide catches 610;

as shown in fig. 6, each sliding block 300 of the present invention is not fixed to the guiding block piece by using the prior art, but the front and rear end faces of each sliding block 300 are also provided with a sliding block guiding groove 308 matching with the guiding edge 611 corresponding to the corresponding side edge of the guiding block piece 610; namely, one side of the guide baffle group 600 and the wedge 500 can relatively slide through the matching of the guide baffle 610 and the wedge guide groove 508, and the other side of the guide baffle group 600 and the slide block can also relatively slide through the matching of the guide baffle 610 and the slide block guide groove 308; and the groove clearance of the slider guide groove 308 and the wedge guide groove 508 is greater than the thickness of the guide fence 610, i.e., the guide fence 610 is in clearance fit with the slider guide groove 308 and the wedge guide groove 508;

the guide baffle group 600, the sliding connection structure between the guide baffle group and the sliding block and the wedge block, and the clearance fit are beneficial to compensating machining errors so as to facilitate assembly, and the problems that the vertical opening amount of a U-shaped spring is inconsistent, the upper and lower shoulder surfaces of the sliding block and the supporting surface of the sliding chute of the bracket are inclined or the braking surfaces of the left and right wedge blocks are not parallel and the like caused by machining and assembly errors of parts such as the U-shaped spring, the sliding block, the guide baffle group and a rolling needle or wedge block thereof can be eliminated; and the guide baffle group 600 integrates the guide baffle and the roller pin, so that the volume of the whole machine can be effectively reduced.

As shown in fig. 8 in combination with fig. 5, in order to save space, the guide plate 610 of the guide plate set 600 is further provided with an avoiding opening 612 at the lower part of the carrier table 120 corresponding to the guide groove 122 at the lower end of the carrier frame;

referring to fig. 9, 10a and 10b, the drawbar unit 900 of the present invention includes a drawbar 910 and a drawbar plate 920, the drawbar 910 and the drawbar plate 920 are welded and fixed, two long holes 921 are formed on the drawbar plate 920, each wedge 500 is correspondingly formed with a through hole 501, the pin 510 passes through the through hole 501 and the corresponding long hole 921, and the pin is limited by a flat washer 520 and a locator pin 511; the pull rod 910 is pulled to drive the wedges 500 on the two sides to move upwards and under the guiding action of the guide baffle group 600, the distance between the wedges on the two sides is reduced to be attached to the elevator guide rail, the wedges 500 move upwards under the action of traction force continuously and open the U-shaped spring 200, and the wedges 500 clamp the elevator guide rail under the action of the elastic force of the U-shaped spring 200, so that the overspeed elevator is stopped and kept in a static state.

In addition, as shown in fig. 10a and 10b, in order to solve the problem D, a brake plate 520 made of a composite friction material is bonded to the brake side surface of the wedge 500, and the brake plate 520 has the characteristics of stable friction coefficient, wear resistance, high temperature resistance and the like, and in order to ensure that the brake plate and the wedge are firmly installed and positioned, a limiting stop shoulder 521 is further arranged on the periphery of the brake side surface of the wedge 500, which is located around the brake plate; in the safety tongs braking process, the U-shaped spring provides pressure to the center, compresses tightly the combined material braking plate on elevator guide rail surface, rubs the speed reduction braking and stops, and combined material braking plate and guide rail surface are sliding friction, can not produce the damage to the guide rail, repeatedly usable, and coefficient of friction stabilizes and makes whole speed reduction process stable level and smooth, increases the comfort of speed reduction process.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. A guide baffle group is used for progressive safety tongs and is characterized by comprising a front guide baffle plate, a rear guide baffle plate and a plurality of rolling needles clamped between the two guide baffle plates in a row, wherein two ends of a needle shaft of a plurality of rolling needles in proper positions are fixedly connected with the front guide baffle plate and the rear guide baffle plate through fasteners, so that the rolling needles and the two guide baffle plates are integrated; the left side and the right side of each guide blocking piece are respectively provided with a guide edge.

2. The progressive safety gear comprises a bracket and is characterized in that a guide baffle group is arranged between the sliding block and the wedge block;

the guide baffle group comprises a front guide baffle plate and a rear guide baffle plate and a plurality of rolling pins clamped between the two guide baffle plates in a row, and the two ends of a needle shaft of the plurality of rolling pins at proper positions are fixedly connected with the front guide baffle plate and the rear guide baffle plate through fasteners, so that the rolling pins and the two guide baffle plates are integrated; the left side and the right side of each guide separation blade are respectively provided with a guide edge;

the front end surface and the rear end surface of the wedge block are provided with wedge block guide grooves matched with the guide edges of the corresponding side edges of the corresponding guide retaining pieces;

the front end face and the rear end face of the sliding block are also provided with sliding block guide grooves matched with the guide edges of the corresponding side edges of the corresponding guide retaining pieces.

3. The structure of a connection node between a slide block and a wedge block as set forth in claim 2, wherein the clearance between the slide block guide groove and the wedge block guide groove is greater than the thickness of the guide fence, i.e., the guide fence is in clearance fit with the slide block guide groove and the wedge block guide groove.

4. The structure of a connecting joint between a slide block and a wedge block according to claim 2, wherein the guide plate of the guide plate group is further provided with an avoidance port at a lower portion thereof.

5. Progressive safety gear, characterized in that it comprises a set of guide flaps according to claim 1.

6. Progressive safety gear, characterized in that it comprises a structure of connection nodes between the slide and the wedge according to claim 2.

Images