CN218520845U - Lifting mechanism, lifting device and elevator - Google Patents

Abstract

The utility model relates to the technical field of elevator equipment, and discloses a lifting mechanism, which comprises a first lifting component and a second lifting component which are arranged on a seat body; the lifting mechanism further comprises a driving piece and a linkage assembly, the driving piece is in transmission connection with the first lifting assembly, and the linkage assembly is in transmission connection with the first lifting assembly and the second lifting assembly; when the driving piece drives the first lifting assembly to rotate, the first lifting assembly is synchronously linked with the second lifting assembly through the linkage assembly. Compared with the prior art, the first lifting assembly and the second lifting assembly are arranged through linkage of the linkage assembly, when the driving piece works, the first lifting assembly and the second lifting assembly can synchronously perform lifting actions, the problem that the safety tongs cannot be lifted by the lifting mechanism in the prior art is solved, and the overall safety of the lifting mechanism is high.

Description

Lifting mechanism, lifting device and elevator

Technical Field

The utility model relates to an elevator equipment technical field especially relates to a carry and draw mechanism, lifting device and elevator.

Background

The traditional elevator is provided with a speed limiter, a safety gear lifting device is connected with a steel wire rope of the speed limiter, and the lifting force provided by the speed limiter lifts the safety gear through the safety lifting device to realize braking of the safety gear. The safety pulling device needs to realize the transmission of the pulling force of the speed limiter and ensure that the safety tongs can smoothly act when the elevator exceeds the speed limit.

The existing safety pulling device is difficult to realize the effect of pulling the left safety tongs and the right safety tongs simultaneously, so that the left safety tongs and the right safety tongs have the problem of asynchronous braking. When the safety lifting device operates, the safety tongs on one side brake before the safety tongs on the other side, namely, one side and the other side of the elevator car can generate relative displacement, when the elevator runs at overspeed, the relative displacement on the two sides can be greatly amplified, so that the safety tongs can seriously incline left and right during braking, the car can be damaged when the safety tongs are serious, the protection to passengers is greatly reduced, and the overall safety is low.

SUMMERY OF THE UTILITY MODEL

Therefore, a lifting mechanism, a lifting device and an elevator are needed to be provided, and the problem that the safety tongs cannot be lifted simultaneously by the lifting mechanism in the prior art is solved.

A lifting mechanism comprises a first lifting component and a second lifting component which are arranged on a seat body;

the lifting mechanism further comprises a driving piece and a linkage assembly, the driving piece is in transmission connection with the first lifting assembly, and the linkage assembly is in transmission connection with the first lifting assembly and the second lifting assembly;

when the driving piece drives the first lifting assembly to rotate, the first lifting assembly is synchronously linked with the second lifting assembly through the linkage assembly.

Compared with the prior art, the first lifting component and the second lifting component are arranged through linkage of the linkage component, when the driving component works, the first lifting component and the second lifting component can synchronously perform lifting actions, when the lifting mechanism is integrally applied to elevator equipment, the first lifting component and the second lifting component are connected with safety tongs on two sides of an elevator, when the elevator has an overspeed problem, the driving component is started, and the first lifting component and the second lifting component are linked through the linkage component to synchronously lift the safety tongs on two sides, so that safety braking is performed on a car, the problem that the lifting mechanism cannot lift the safety tongs simultaneously in the prior art is solved, and the overall safety of the lifting mechanism is high.

In one embodiment, the first pulling assembly comprises a first driven shaft, and a first pulling arm disposed on the first driven shaft;

the second lifting assembly comprises a second driven shaft and a second lifting arm arranged on the second driven shaft;

the first driven shaft and the second driven shaft are rotatably connected with the seat body.

In one embodiment, the linkage assembly includes a rocker arm and a link;

the two rocker arms are respectively arranged on the first driven shaft and the second driven shaft;

and two ends of the connecting rod are respectively connected with the two rocker arms.

In one embodiment, the first lifting assembly and the second lifting assembly are arranged on the seat body in a mirror symmetry manner;

the center point is formed by connecting the axis of the first driven shaft and the axis of the second driven shaft, the two rocker arms take the center point as an original point, and the two rocker arms are symmetrically arranged at the original point;

when the first driven shaft rotates, the second driven shaft is linked through the connecting rod to synchronously rotate, and the rotating directions of the first driven shaft and the second driven shaft are opposite.

In one embodiment, the drive member comprises an electrically powered trigger device;

the electric trigger equipment comprises a control arm, the control arm is connected with the first driven shaft, and the electric trigger equipment drives the first driven shaft to rotate through the control arm.

In one embodiment, the driving member comprises a resilient member;

the elastic piece is in a compressed state, and the elastic force of the elastic piece drives the connecting rod to link the first driven shaft and the second driven shaft to rotate.

In one embodiment, the seat body is provided with a mounting part for mounting and fixing the elastic part, the connecting rod penetrates through the mounting part, and one side of the mounting part is connected with the elastic part;

the connecting rod comprises a threaded section, the threaded section is in threaded connection with a bolt adjusting seat, and the end part of the elastic piece is tightly pressed on the bolt adjusting seat.

In one embodiment, an auxiliary supporting seat is arranged on the seat body, and the auxiliary supporting seat is positioned on one side of the mounting part, which faces away from the elastic part;

and the auxiliary supporting seat is connected with a supporting bolt through threads, and the stud end of the supporting bolt is abutted to the mounting piece.

In one embodiment, the lifting mechanism further comprises a limiting component for limiting the rotation angle of the first driven shaft, and the limiting component is arranged on the seat body.

In one embodiment, the limiting assembly comprises a rotating member and a limiting member;

the rotating part is arranged on the first driven shaft and synchronously rotates along with the first driven shaft;

the locating part is provided with two, two the locating part all is in on the rotation stroke of rotating the piece, two the locating part restriction the rotation range of rotating the piece.

In one embodiment, when the lifting mechanism is in an initial state, the first lifting arm is in a relaxed state, the rotating member abuts against one of the limiting members, and the first lifting arm forms a first included angle with a horizontal plane;

when the lifting mechanism is in a lifting state, the first lifting arm is driven by the first driven shaft to lift upwards, the rotating piece is abutted against the other limiting piece, and a second included angle is formed between the first lifting arm and the horizontal plane;

the angle value of the first included angle is equal to the angle value of the second included angle.

The utility model also provides a lifting device, which comprises the lifting mechanism, and the lifting device also comprises a lifting rod and a safety gear;

one end of the lifting rod is connected with the lifting mechanism, and the other end of the lifting rod is connected with the safety tongs.

Compared with the prior art, when elevator equipment needs to be safely braked, the safety tongs can be synchronously pulled through the matching arrangement of the linkage assembly, the problem that the safety tongs cannot be pulled by the pulling mechanism in the prior art is solved, and the safety tongs have high safety and stability.

In one embodiment, the top of the safety gear is provided with a stopper, the stopper covers the jaw of the safety gear, and one side of the stopper is provided with a sliding groove attached to the guide rail.

In one embodiment, the outer side of the blocking piece comprises an abutting surface attached to the guide rail and a guide surface inclined from top to bottom in the direction away from the chute, and the guide surface guides sundries to roll away from the jaw.

The utility model also provides an elevator, including above-mentioned scheme draw gear.

Other beneficial effects are as follows:

1. the two rocker arms are arranged in an origin point symmetry mode, the linkage assembly integrally presents a Z-shaped origin point symmetry structure, when the driving piece drives the first driven shaft to rotate, the linkage assembly can not only simultaneously link the second driven shaft, but also enable the rotation speed of the second driven shaft and the first driven shaft to realize a higher synchronization effect, and the stability of the overall structure of the linkage assembly is improved;

2. in order to further improve the driving stability of the driving part, the driving part further comprises an elastic part, when the car is subjected to an overspeed condition and needs to be braked, the electric trigger equipment releases the locking state of the first driven shaft, and under the normal condition, the electric trigger equipment drives the first driven shaft and the second driven shaft to realize the lifting action of the safety gear. However, when the driving force of the electric trigger device is insufficient, the elastic part in a compressed state pushes the whole connecting rod to move under the action of the elastic force of the elastic part, and the connecting rod is linked with the first driven shaft and the second driven shaft to synchronously rotate, so that the effect of synchronously lifting the safety tongs by the first lifting arm and the second lifting arm is finally realized;

3. the relative position of the seat on the connecting rod can be adjusted through the adjusting bolt, so that the compression amount of the spring can be adjusted, the elastic piece can adjust the compression amount according to the actually required lifting force of the safety tongs, the arrangement of the elastic piece can be more flexible, and the overall practicability is higher;

4. the auxiliary supporting seat plays a role in secondary protection as a whole, when the bolt of the mounting part loosens and falls off, the mounting part is separated from the connecting rod under the action of the elastic force of the elastic part, at the moment, the auxiliary supporting seat is positioned on the moving path of the mounting part, and the auxiliary supporting seat can play an auxiliary supporting role on the elastic part to limit the mounting part to continuously move on the connecting rod;

5. the supporting bolt can be in direct contact with the mounting part by adjusting the supporting bolt, and when the mounting part is separated from the base body due to loosening and falling of the bolt, the supporting bolt can assist in supporting the mounting part in time, so that the overall mounting stability of the driving part can be greatly improved;

6. the limiting component replaces the electric trigger equipment to limit the rotation angle of the first driven shaft, when the driving force of the electric trigger equipment is insufficient, the elastic part in a compressed state pushes the whole connecting rod to move under the action of the elastic force of the elastic part, and finally the first lifting arm and the second lifting arm are driven to synchronously lift the safety tongs, but the elastic part cannot limit the rotation angle and the rotation stroke of the first driven shaft, and at the moment, the limiting component replaces the electric trigger equipment to limit the rotation angle of the first driven shaft, so that the lifting actions of the first lifting arm and the second lifting arm still have higher stability;

7. and setting a first included angle and a second included angle to further improve the motion synchronization degree of the first lifting arm and the second lifting arm, wherein the angle value of the first included angle is equal to that of the second included angle.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a lifting mechanism in an embodiment of the present invention;

FIG. 2 is a schematic view of a specific structure of the stop assembly shown in FIG. 2;

fig. 3 is a schematic structural diagram of a linkage assembly according to an embodiment of the present invention;

FIG. 4 is a schematic view of the first pulling assembly and the second pulling assembly in the embodiment of the present invention;

FIG. 5 is a schematic view of a stopper according to an embodiment of the present invention;

fig. 6 is a side view of a stopper in an embodiment of the invention.

Description of the reference numerals:

10. a base body; 20. a first lifting assembly; 201. a first driven shaft; 202. a first lifting arm; 30. a second pulling assembly; 301. a second driven shaft; 302. a second lifting arm; 40. a rocker arm; 41. a connecting rod; 42. A threaded segment; 43. a bolt adjusting seat; 50. an electrically powered triggering device; 501. a control arm; 51. an elastic member; 60. a mounting member; 601. mounting a plate; 70. an auxiliary support seat; 701. a movable hole; 702. a support bolt; 80. A mounting seat; 801. a limiting member; A. a first included angle; B. a second included angle; 90. lifting a pull rod; 91. safety tongs; 92. a stopper; 921. a chute; 922. a guide surface; 93. a guide rail.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

Present safe pulling apparatus is difficult to realize about the effect that safety tongs carried simultaneously, leads to about the safety tongs to have the asynchronous problem of braking, when the elevator was in the overspeed operation, the relative displacement of both sides can be enlarged a lot, and the horizontal tilt is serious when leading to the safety tongs braking, based on this, the utility model provides a pulling mechanism, pulling apparatus and elevator aims at solving among the prior art problem that pulling mechanism can't carry out the pulling to safety tongs simultaneously, and its concrete scheme is as follows:

referring to fig. 1 and 2, a lifting mechanism includes a first lifting assembly 20 and a second lifting assembly 30 disposed on a base 10. The lifting mechanism further comprises a driving member and a linkage assembly, the driving member is in transmission connection with the first lifting assembly 20, and the linkage assembly is in transmission connection with the first lifting assembly 20 and the second lifting assembly 30. When the driving member drives the first pulling assembly 20 to rotate, the first pulling assembly 20 is linked with the second pulling assembly 30 through the linkage assembly, and the driving member drives the first pulling assembly 20 and the second pulling assembly 30 to pull synchronously.

Specifically, the first lifting component 20 and the second lifting component 30 are arranged through linkage of the linkage component, when the driving component works, the first lifting component 20 and the second lifting component 30 can synchronously perform lifting actions, when the lifting mechanism is integrally applied to elevator equipment, the first lifting component 20 and the second lifting component 30 are connected with safety tongs 91 on two sides of an elevator, when the elevator has an overspeed problem, the driving component is started, and the first lifting component 20 and the second lifting component 30 are linked through the linkage component to synchronously lift the safety tongs 91 on two sides, so that safety braking is performed on a car, the problem that the lifting mechanism cannot simultaneously lift the safety tongs 91 in the prior art is solved, and the overall safety of the lifting mechanism is high.

In one embodiment, the first pull assembly 20 and the second pull assembly 30 are further refined. The first pulling assembly 20 includes a first driven shaft 201 and a first pulling arm 202 disposed on the first driven shaft 201. The second pulling assembly 30 includes a second driven shaft 301, and a second pulling arm 302 disposed on the second driven shaft 301. The first driven shaft 201 and the second driven shaft 301 are both rotatably connected with the seat body 10.

It should be noted that, the first lifting arm 202 and the second lifting arm 302 are motion output components, the driving member is in transmission connection with the first driven shaft 201, when the driving member works, the driving member drives the first driven shaft 201, and synchronously links the second driven shaft 301 to rotate through the linkage assembly, the first driven shaft 201 and the second driven shaft 301 synchronously drive the corresponding first lifting arm 202 and the corresponding second lifting arm 302 to rotate, and finally, a lifting motion is performed.

In one embodiment, the linkage assembly is further refined. The linkage assembly comprises two rocker arms 40 and two connecting rods 41, wherein the two rocker arms 40 are respectively arranged on the first driven shaft 201 and the second driven shaft 301, and two ends of each connecting rod 41 are respectively connected with the two rocker arms 40.

Specifically, in this embodiment, the rocker arm 40 corresponding to the first driven shaft 201 has one end hinged to the first driven shaft 201 and the other end hinged to the connecting rod 41; one end of the rocker arm 40 corresponding to the second driven shaft 301 is hinged to the second driven shaft 301, and the other end is hinged to the connecting rod 41. Meanwhile, the swing arms 40 are hinged in the same axial direction, and the whole body has two structural layouts of a quadrangle or a reverse quadrangle (a transverse Z shape).

It should be noted that, two layout manners can both realize the synchronous linkage of the first driven shaft 201 and the second driven shaft 301, and the specific layout manner is related to the layout directions of the first lifting arm 202 and the second lifting arm 302, and the two layout manners are further described below:

the linkage assembly is integrally arranged in a quadrilateral structure, at the moment, the two rocker arms 40 are both arranged on the same side, according to the motion relationship of the quadrilateral structure, when the driving part drives the first driven shaft 201 to rotate, the second driven shaft 301 is synchronously linked through the rocker arms 40 and the connecting rod 41, at the moment, the rotation direction of the second driven shaft 301 is the same as that of the first driven shaft 201, in order to drive the first lifting arm 202 and the second lifting arm 302 to synchronously rotate upwards, the first lifting arm 202 and the second lifting arm 302 need to be arranged on the same side, for example, the first lifting arm 202 needs to be arranged on the left side of the first driven shaft 201, and the second lifting arm 302 also needs to be arranged on the left side of the second driven shaft 301.

Referring to fig. 3, the linkage assembly is integrally configured in an inverted quadrilateral (transverse zigzag) structure, in which the two rocker arms 40 are arranged in an inverted manner as shown in fig. 3, when the driving element drives the first driven shaft 201 to rotate, the rocker arms 40 and the connecting rod 41 are used to synchronously link the second driven shaft 301, in which the rotation direction of the second driven shaft 301 is opposite to the rotation direction of the first driven shaft 201, and in order to drive the first lifting arm 202 and the second lifting arm 302 to rotate upward synchronously, the first lifting arm 202 and the second lifting arm 302 need to be arranged on opposite sides, for example, the first lifting arm 202 needs to be arranged on the left side of the first driven shaft 201, and the second lifting arm 302 needs to be arranged on the right side of the second driven shaft 301.

When the lifting mechanism is applied to an elevator apparatus, since the guide rails 93 of the elevator apparatus are generally disposed on both sides of the car, in this embodiment, the first lifting assembly 20 and the second lifting assembly 30 are disposed on the base 10 in mirror symmetry, the two swing arms 40 are disposed in opposite directions, and the linkage and rotation directions of the first driven shaft 201 and the second driven shaft 301 are opposite.

Preferably, in this embodiment, the arrangement of the two rocker arms 40 is further refined in order to further optimize the structural layout of the linkage assembly. The connecting line of the axis of the first driven shaft 201 and the axis of the second driven shaft 301 has a midpoint, the two rocker arms 40 use the midpoint as an origin, and the two rocker arms 40 are symmetrically arranged at the origin. Through such structural setting, the whole original point symmetrical type structure that demonstrates the zigzag of linkage subassembly, when driving piece drive first driven shaft 201 rotated, the linkage subassembly not only can link second driven shaft 301 simultaneously, can also let the rotation rate of second driven shaft 301 and first driven shaft 201 can realize higher synchronous effect, improves the overall structure stability of linkage subassembly.

In one embodiment, the driving member comprises an electric trigger device 50, the electric trigger device 50 comprises a control arm 501, the control arm 501 is connected with the first driven shaft 201, and the electric trigger device 50 drives the first driven shaft 201 to rotate through the control arm 501. Specifically, after the electric trigger device 50 receives the action signal, the control arm 501 is driven to swing, and the swing of the control arm 501 drives the first driven shaft 201 to rotate, so as to finally achieve the effect of driving the first driven shaft 201 and the second driven shaft 301 to rotate synchronously.

In order to further improve the driving stability of the driving member, the driving member further comprises an elastic member 51. The elastic member 51 is compressed, and the elastic force of the elastic member 51 drives the connecting rod 41 to rotate in conjunction with the first driven shaft 201 and the second driven shaft 301. Specifically, the fixed installed part 60 that supplies the spring mounting fixed that is provided with on the pedestal 10, installed part 60 is including the mounting panel 601 that hangs out the setting, and the mounting panel 601 is worn to establish by connecting rod 41, and one side and the spring butt of mounting panel 601. The elastic member 51 includes a spring wound around the outside of the link 41.

Illustratively, when the lifting mechanism is applied to an elevator device, in a normal use condition, the first lifting arm 202 and the second lifting arm 302 are both at the lowest height, at this time, the electric trigger device 50 locks the first driven shaft 201, when the car has an overspeed condition and needs to be braked, the electric trigger device 50 releases the locking state of the first driven shaft 201, and in a normal condition, at this time, the electric trigger device 50 drives the first driven shaft 201 and the second driven shaft 301 to realize the lifting action of the safety tongs 91. However, if the driving force of the electric trigger device 50 is insufficient, the safety gear 91 of the elevator cannot perform the pulling operation, which is a fatal risk for the operation of the elevator.

The elastic member 51 is structurally arranged to provide a plurality of lifting driving modes for the lifting mechanism, and when the elevator is in an overspeed condition and braking is needed, but the driving force of the electric trigger device 50 is insufficient, the electric trigger device 50 releases the locking state of the first driven shaft 201, but the electric trigger device 50 cannot drive the first driven shaft 201 to rotate. At this time, the elastic member 51 in a compressed state pushes the whole connecting rod 41 to move under the action of its own elastic force, and the connecting rod 41 is linked with the first driven shaft 201 and the second driven shaft 301 to synchronously rotate, so that the effect of synchronously lifting the safety gear 91 by the first lifting arm 202 and the second lifting arm 302 is finally realized.

In addition, in one embodiment, the elastic member 51 is a main driving part for pushing the link 41 to move, and the electric trigger device 50 is a position limiting part. When the elevator normally runs, the first lifting arm 202 and the second lifting arm 302 are both at the lowest height, at this time, the electric trigger device 50 drives the control arm 501, so that the control arm 501 generates a thrust force larger than the elastic member 51, and the direction of the thrust force is opposite to the direction of the elastic member 51, and the thrust force overcomes the elastic force of the elastic member 51 to keep the relative positions of the first lifting arm 202 and the second lifting arm 302, thereby realizing the effect of limiting the movement of the connecting rod 41 under the action of the elastic member 51. When the car has an overspeed condition and needs braking, the electric trigger device 50 releases the application of force to the control arm 501, so as to release the locked state of the first driven shaft 201, at this time, the elastic piece 51 is no longer limited by the thrust of the control arm 501, the elastic piece 51 pushes the connecting rod 41 to drive the first lifting arm 202 and the second lifting arm 302 to lift, and finally, the braking and deceleration effects are achieved.

Preferably, in this embodiment, the linkage 41 includes a threaded section 42, the threaded section 42 is threadedly connected to a bolt adjustment seat 43, and the end of the spring is compressed against the bolt adjustment seat 43.

Specifically, one end of the spring is fixed relative to the seat body 10, and the other end is pressed against the bolt adjusting seat 43. Therefore, the relative position of the seat 43 on the connecting rod 41 can be adjusted by adjusting the bolt, and the compression amount of the spring can be adjusted by adjusting the relative position of the seat 51 on the connecting rod 41, so that the elastic piece 51 can be adjusted according to the actual required lifting force of the safety gear 91, the arrangement of the elastic piece 51 can be more flexible, and the overall practicability is higher.

Preferably, in this embodiment, the auxiliary support 70 is fixedly disposed on the seat body 10, the auxiliary support 70 is located on a side of the mounting member 60 opposite to the spring, a movable hole 701 for the connecting rod 41 to pass through is disposed on the auxiliary support 70, and the auxiliary support 70 is disposed adjacent to the mounting member 60.

The whole auxiliary support seat 70 plays a role in secondary protection, when the bolt of the mounting part 60 is loosened and falls off, the mounting part 60 is separated from the elastic part 51 along the connecting rod 41 under the action of the elastic force, at the moment, the auxiliary support seat 70 is positioned on the moving path of the mounting part 60, the auxiliary support seat 70 can play an auxiliary supporting role on the elastic part 51, and the mounting part 60 is limited to continuously move on the connecting rod 41. Further, in this embodiment, a support bolt 702 is threadedly connected to the auxiliary support base 70, and a stud end of the support bolt 702 abuts against the mounting member 60. Through adjusting supporting bolt 702, can make supporting bolt 702 can with installed part 60 direct contact, when installed part 60 breaks away from pedestal 10 because of the bolt is not hard up, drops, supporting bolt 702 can carry out the auxiliary stay to installed part 60 in time, makes the holistic installation stability of driving piece can obtain great improvement.

Preferably, in this embodiment, the lifting mechanism further includes a limiting component for limiting a rotation angle of the first driven shaft 201, the limiting component is disposed on the seat body 10, and the limiting component is disposed to limit the rotation angle of the first driven shaft 201. The pulling stroke of the first pulling arm 202 is related to the rotation angle of the first driven shaft 201, and in a normal case, the rotation angle of the first driven shaft 201 is determined by the driving stroke of the driving member, and the pulling stroke of the first pulling arm 202 can be set by presetting the driving stroke of the driving member.

However, in actual operation, if the driving force of the electric trigger device 50 is insufficient, the elastic element 51 in the compressed state pushes the whole connecting rod 41 to move under the action of its own elastic force, and finally drives the first lifting arm 202 and the second lifting arm 302 to lift the safety tongs 91 synchronously, but the elastic element 51 cannot limit the rotation angle and the rotation stroke of the first driven shaft 201, and at this time, the limiting component limits the rotation angle of the first driven shaft 201 instead of the electric trigger device 50, so that the lifting operation of the first lifting arm 202 and the second lifting arm 302 can still have high stability.

In this embodiment, the spacing assembly is further refined. The limiting assembly includes a mounting seat 80, a rotating element and two limiting elements 801, wherein, in order to optimize the overall structure, in this embodiment, the rotating element is the rocker arm 40 disposed on the first driven shaft 201, and the two limiting elements 801 limit the rotating range of the rocker arm 40. The limiting members 801 are arranged on the mounting base 80, the number of the limiting members 801 is two, the two limiting members 801 are both located on the rotation stroke of the rocker arm 40, and the two limiting members 801 limit the rotation range of the rocker arm 40.

Referring to fig. 4, it should be noted that when the lifting mechanism is in the initial state, the first lifting arm 202 is in a downward inclined state, the rocker arm 40 abuts against the right limiting member 801, and at this time, the first lifting arm 202 forms a first included angle a with the horizontal plane; when the lifting mechanism is in a lifting state, the first lifting arm 202 is driven by the first driven shaft 201 to rotate upwards, the first lifting arm 202 is in an upwards inclined state, the rocker arm 40 abuts against the left limiting part 801, and at this time, the first lifting arm 202 and the horizontal plane form a second included angle B.

Preferably, in order to further ensure the synchronization of the actions of the first lifting arm 202 and the second lifting arm 302, the angle value of the first included angle a is equal to the angle value of the second included angle B in this embodiment. Meanwhile, since the first pull-up arm 202 is driven by the rotation of the first driven shaft 201 to move synchronously, the effective stroke of the first driven shaft 201 for the transmission of the first pull-up arm 202 is 180 degrees, so that the angle value of the first included angle a is limited, the angle value of the first included angle a is less than or equal to 90 degrees, and in this embodiment, the angle value of the first included angle a is 45 degrees.

Taking the first pull-up arm 202 as an example, when the first pull-up arm 202 is in the initial state, the whole body is inclined downward, and the rotating member abuts against the right-side limiting member 801, so that a first included angle a is formed. When the first pulling arm 202 rotates to the middle of the whole movement, the first pulling arm 202 is horizontal, and when the first pulling arm 202 completes the whole pulling movement, the pulling mechanism is in a pulling state, and at this time, the rotating member abuts against the left side limiting member 801.

Preferably, in this embodiment, the limiting member 801 includes a limiting bolt, and the limiting bolt is in threaded connection with the mounting seat 80. The limit bolt has adjustability, and an operator can adjust the position of the limit bolt according to the required lifting stroke of the safety tongs 91, rotate the limit bolt, and adjust the distance between the two limit bolts.

The utility model discloses still provide a lifting device, shown with reference to fig. 1, fig. 2, including the mechanism of lifting mentioned in the above-mentioned scheme, lifting device still includes lifting rod 90 and safety tongs 91. Wherein, one end of the lifting rod 90 is connected with the lifting mechanism, and the other end is connected with the safety gear 91.

In this embodiment, the lifting device is applied to an elevator apparatus as a whole, wherein the base 10 is two beams on the top of the car in the elevator apparatus, and the safety braking of the elevator apparatus is realized by lifting the safety tongs 91. In this embodiment, the safety gear 91 is connected to two guide rails 93 of the elevator installation in a corresponding manner, and the two safety gears 91 are connected to two lifting assemblies via the lifting rods 90. When elevator equipment need carry out safety braking, carry the driving piece among the mechanism of drawing and will start, the first driven shaft 201 of driving piece drive rotates, finally realizes carrying out the drawing to safety tongs 91 in step, has solved among the prior art and has carried the mechanism and can't carry the problem of drawing to safety tongs 91 simultaneously, wholly possesses higher security and stability.

Referring to fig. 5 and 6, in this embodiment, it is more preferable that a stopper 92 is disposed on the top of the safety gear 91, the stopper 92 covers the jaw of the safety gear 91, and a sliding slot 921 attached to the guide rail 93 is formed on one side of the stopper 92. The stopper 92 functions to block foreign matter such as sand, and prevents the foreign matter from falling from above into the jaw of the safety gear 91, thereby improving the braking stability of the safety gear 91. In addition, in this embodiment, the outer side of the stopper 92 includes an abutting surface abutting against the guide rail 93 and a guide surface 922 inclined from top to bottom in a direction away from the chute, and the guide surface 922 guides the sundries to roll away from the jaws. Specifically, in this embodiment, 3 guiding surfaces 922 are provided, and 3 guiding surfaces 922 and the abutting surface are combined to form 4 outer side surfaces of the stopper 92.

In addition, in order to facilitate the operator to mount the blocking member 92 on the lifting rod 90, in this embodiment, the blocking member 92 is integrally split into two halves from the middle portion of the sliding slot 921, when the blocking member 92 is mounted, the blocking member 92 split into two halves is combined, and the lifting rod 90 is clamped in the middle portion, which needs to correspond to the jaw of the safety tongs 91 during the mounting process, and after the blocking member 92 is integrally mounted in place, the blocking member 92 can be fixed integrally by means of bolt connection.

The utility model also provides an elevator, including above-mentioned draw gear. When the elevator has an overspeed problem, a driving part of the lifting mechanism is started, and the first lifting component 20 and the second lifting component 30 are linked through the linkage component to synchronously lift the safety tongs 91 on two sides, so that the car is safely braked, the problem that the lifting mechanism cannot lift the safety tongs 91 simultaneously in the prior art is solved, and the overall safety of the lifting mechanism is high.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims (15)

1. A lifting mechanism is characterized by comprising a first lifting component (20) and a second lifting component (30) which are arranged on a seat body (10);

the lifting mechanism further comprises a driving piece and a linkage assembly, the driving piece is in transmission connection with the first lifting assembly (20), and the linkage assembly is in transmission connection with the first lifting assembly (20) and the second lifting assembly (30);

when the driving piece drives the first lifting assembly (20) to rotate, the first lifting assembly (20) is synchronously linked with the second lifting assembly (30) through the linkage assembly.

2. The lift mechanism of claim 1, wherein:

the first lifting assembly (20) comprises a first driven shaft (201) and a first lifting arm (202) arranged on the first driven shaft (201);

the second lifting assembly (30) comprises a second driven shaft (301) and a second lifting arm (302) arranged on the second driven shaft (301);

the first driven shaft (201) and the second driven shaft (301) are rotatably connected with the seat body (10).

3. The lift mechanism of claim 2 wherein the linkage assembly includes a rocker arm (40) and a link (41);

two rocker arms (40) are arranged and are respectively arranged on the first driven shaft (201) and the second driven shaft (301);

two ends of the connecting rod (41) are respectively connected with the two rocker arms (40).

4. The lifting mechanism of claim 3, wherein the first lifting assembly (20) and the second lifting assembly (30) are arranged on the base body (10) in mirror symmetry;

a connecting line of the axis of the first driven shaft (201) and the axis of the second driven shaft (301) is provided with a midpoint, the two rocker arms (40) take the midpoint as an origin, and the two rocker arms (40) are symmetrically arranged at the origin;

when the first driven shaft (201) rotates, the second driven shaft (301) is linked to rotate synchronously through the connecting rod (41), and the rotating directions of the first driven shaft (201) and the second driven shaft (301) are opposite.

5. The pulling mechanism of claim 3, wherein the drive member includes an electrically powered trigger device (50);

the electric trigger device (50) comprises a control arm (501), the control arm (501) is connected with the first driven shaft (201), and the electric trigger device (50) drives the first driven shaft (201) to rotate through the control arm (501).

6. The pulling mechanism according to claim 3 or 5, wherein the driving member comprises an elastic member (51);

the elastic piece (51) is in a compressed state, and the elastic force of the elastic piece (51) drives the connecting rod (41) to be linked with the first driven shaft (201) and the second driven shaft (301) to rotate.

7. The lifting mechanism according to claim 6, wherein a mounting part (60) for mounting and fixing the elastic member (51) is disposed on the base body (10), the connecting rod (41) is inserted into the mounting part (60), and one side of the mounting part (60) is connected to the elastic member (51);

the connecting rod (41) comprises a threaded section (42), the threaded section (42) is in threaded connection with a bolt adjusting seat (43), and the end part of the elastic piece (51) is tightly pressed on the bolt adjusting seat (43).

8. The lifting mechanism according to claim 7, wherein an auxiliary support seat (70) is disposed on the seat body (10), and the auxiliary support seat (70) is located on a side of the mounting part (60) facing away from the elastic member (51);

and a supporting bolt (702) is connected to the auxiliary supporting seat (70) in a threaded manner, and the stud end of the supporting bolt (702) is abutted to the mounting piece (60).

9. The lifting mechanism according to claim 2 or 3, further comprising a limiting component for limiting the rotation angle of the first driven shaft (201), wherein the limiting component is arranged on the seat body (10).

10. The pulling mechanism of claim 9, wherein the limiting assembly comprises a rotating member and a limiting member (801);

the rotating part is arranged on the first driven shaft (201) and synchronously rotates along with the first driven shaft (201);

the number of the limiting parts (801) is two, the two limiting parts (801) are located on the rotation stroke of the rotation part, and the two limiting parts (801) limit the rotation range of the rotation part.

11. The lift mechanism of claim 10, wherein:

when the lifting mechanism is in an initial state, the first lifting arm (202) is in a relaxed state, the rotating piece abuts against one limiting piece (801), and a first included angle (A) is formed between the first lifting arm (202) and a horizontal plane;

when the lifting mechanism is in a lifting state, the first lifting arm (202) is driven by the first driven shaft (201) to lift upwards, the rotating piece is abutted against the other limiting piece (801), and a second included angle (B) is formed between the first lifting arm (202) and the horizontal plane;

the angle value of the first included angle (A) is equal to the angle value of the second included angle (B).

12. A pulling device, characterized by comprising the pulling mechanism of any one of claims 1 to 11, and further comprising a pulling rod (90) and a safety gear (91);

one end of the lifting rod (90) is connected with the lifting mechanism, and the other end of the lifting rod is connected with the safety tongs (91).

13. The lifting device according to claim 12, wherein a stopper (92) is arranged at the top of the safety gear (91), the stopper (92) covers the jaw of the safety gear (91), and a sliding groove (921) which is attached to the guide rail (93) is formed at one side of the stopper (92).

14. The lifting device according to claim 13, characterized in that the outer side of the stopper (92) comprises an abutment surface abutting against a guide rail (93) and a guide surface (922) inclined from top to bottom in a direction away from the chute, the guide surface (922) guiding the impurities to roll off away from the jaws.

15. An elevator characterized by comprising the pulling-up device as set forth in any one of claims 12 to 14.

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