Lifting mechanism, lifting device and elevator

Abstract

The present invention relates to the technical field of elevator equipment, and discloses a lifting mechanism comprising a first lifting assembly and a second lifting assembly arranged on a seat body; the lifting mechanism further comprises a driving member and a linkage assembly, the driving member being transmission-connected to the first lifting assembly, and the linkage assembly being transmission-connected to the first lifting assembly and the second lifting assembly; when the driving member drives the first lifting assembly to rotate, the first lifting assembly is synchronously linked to the second lifting assembly via the linkage assembly. Compared with the prior art, the first lifting assembly and the second lifting assembly are linked via the linkage assembly, so that when the driving member is operating, the first lifting assembly and the second lifting assembly can perform a lifting action synchronously, thereby solving the problem in the prior art that the lifting mechanism cannot simultaneously lift the safety clamp, and the overall safety of the lifting mechanism is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator equipment, and in particular to a lifting mechanism, a lifting device and an elevator. Background Art

[0002] Traditional elevators are equipped with an overspeed governor. The safety gear pull-up device is connected to the overspeed governor's wire rope. The overspeed governor's pulling force is used to pull the safety gear through the safety pull-up device, thus braking the safety gear. This safety pull-up device must transmit the overspeed governor's pulling force to ensure the safety gear operates smoothly when the elevator exceeds speed.

[0003] Existing safety-lifting devices struggle to simultaneously pull both safety tongs, resulting in asynchronous braking. When the safety-lifting device operates, one safety tong may brake before the other. This creates relative displacement between one side of the elevator car and the other. This relative displacement is greatly amplified when the elevator is overspeeding, causing the safety tongs to tilt significantly when braking. In severe cases, this can lead to damage to the car, significantly compromising passenger protection and reducing overall safety. Summary of the Invention

[0004] Based on this, it is necessary to provide a lifting mechanism, a lifting device and an elevator, aiming to solve the problem in the prior art that the lifting mechanism cannot simultaneously lift the safety clamp.

[0005] A lifting mechanism includes a first lifting component and a second lifting component provided on a base;

[0006] The lifting mechanism further includes a driving member and a linkage assembly, wherein the driving member 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;

[0007] When the driving member drives the first lifting assembly to rotate, the first lifting assembly is synchronously linked to the second lifting assembly through the linkage assembly.

[0008] Compared with the existing technology, the first lifting component and the second lifting component are linked by the linkage component, so that when the driving part is working, the first lifting component and the second lifting component can synchronously perform lifting actions. When the lifting mechanism is applied to the elevator equipment as a whole, the first lifting component and the second lifting component are connected to the safety clamps on both sides of the elevator. When the elevator has an overspeed problem, the driving part will start and link the first lifting component and the second lifting component through the linkage component to synchronously lift the safety clamps on both sides, thereby safely braking the car, solving the problem in the existing technology that the lifting mechanism cannot lift the safety clamps at the same time, and the overall safety of the lifting mechanism is higher.

[0009] In one embodiment, the first lifting assembly includes a first driven shaft, and a first lifting arm disposed on the first driven shaft;

[0010] The second lifting assembly includes a second driven shaft, and a second lifting arm provided on the second driven shaft;

[0011] The first driven shaft and the second driven shaft are both rotatably connected to the base.

[0012] In one embodiment, the linkage assembly includes a rocker arm and a connecting rod;

[0013] There are two rocker arms, which are respectively arranged on the first driven shaft and the second driven shaft;

[0014] The two ends of the connecting rod are respectively connected to the two rocker arms.

[0015] In one embodiment, the first lifting component and the second lifting component are arranged on the base in a mirror-symmetrical manner;

[0016] The midpoint formed by the line connecting the axis center of the first driven shaft and the axis center of the second driven shaft, the two rocker arms take the midpoint as the origin, and the two rocker arms are symmetrically arranged about the origin;

[0017] When the first driven shaft rotates, the second driven shaft is linked to rotate synchronously via the connecting rod, and the first driven shaft and the second driven shaft rotate in opposite directions.

[0018] In one embodiment, the driving member includes an electric trigger device;

[0019] The electric triggering device includes a control arm connected to the first driven shaft. The electric triggering device drives the first driven shaft to rotate through the control arm.

[0020] In one embodiment, the driving member includes an elastic member;

[0021] The elastic member is in a compressed state, and the elastic force of the elastic member drives the connecting rod to rotate in conjunction with the first driven shaft and the second driven shaft.

[0022] In one embodiment, a mounting piece for fixing the elastic piece is provided on the base body, the connecting rod passes through the mounting piece, and one side of the mounting piece is connected to the elastic piece;

[0023] The connecting rod includes a threaded section, the threaded section is threadedly connected to a bolt adjustment seat, and the end of the elastic member is tightly pressed on the bolt adjustment seat.

[0024] In one embodiment, an auxiliary support seat is provided on the seat body, and the auxiliary support seat is located on a side of the mounting member facing away from the elastic member;

[0025] A support bolt is threadedly connected to the auxiliary support seat, and the stud end of the support bolt abuts against the mounting piece.

[0026] In one embodiment, the lifting mechanism further includes a limiting component for limiting the rotation angle of the first driven shaft, and the limiting component is disposed on the base.

[0027] In one embodiment, the limiting assembly includes a rotating member and a limiting member;

[0028] The rotating member is provided on the first driven shaft, and the rotating member rotates synchronously with the first driven shaft;

[0029] There are two limit members, both of which are located on the rotation stroke of the rotating member, and the two limit members limit the rotation range of the rotating member.

[0030] 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 angle with a horizontal plane;

[0031] When the lifting mechanism is in the lifting state, the first lifting arm is pulled upward by the first driven shaft, the rotating member abuts against the other limiting member, and the first lifting arm forms a second angle with the horizontal plane;

[0032] The angle value of the first angle is equal to the angle value of the second angle.

[0033] The present invention further provides a lifting device, comprising the lifting mechanism described in the above solution, wherein the lifting device further comprises a lifting rod and a safety clamp;

[0034] One end of the lifting rod is connected to the lifting member, and the other end is connected to the safety clamp.

[0035] Compared with the existing technology, when the elevator equipment needs to perform safety braking, the safety clamp can be lifted synchronously through the coordinated setting of the linkage components, which solves the problem that the lifting mechanism in the existing technology cannot lift the safety clamp at the same time, and has higher overall safety and stability.

[0036] In one embodiment, a stopper is provided on the top of the safety clamp, the stopper covers the jaws of the safety clamp, and a sliding groove is provided on one side of the stopper to fit with the guide rail.

[0037] In one embodiment, the outer side of the stopper includes a fitting surface that fits with the guide rail and a guide surface that tilts from top to bottom away from the slide groove, and the guide surface guides the debris to roll away from the jaws.

[0038] The present invention also provides an elevator, comprising the lifting device described in the above solution.

[0039] Other beneficial effects:

[0040] 1. The two rocker arms are symmetrically arranged at the origin, and the linkage assembly as a whole presents a Z-shaped origin-symmetrical structure. When the driving member drives the first driven shaft to rotate, the linkage assembly can not only simultaneously drive the second driven shaft, but also achieve a high synchronization effect on the rotation rate of the second driven shaft and the first driven shaft, thereby improving the overall structural stability of the linkage assembly;

[0041] 2. To further improve the driving stability of the driving member, the driving member also includes an elastic member. When the car overspeeds and needs to be braked, the electric trigger device releases the lock state of the first driven shaft. Under normal circumstances, the electric trigger device drives the first and second driven shafts to lift the safety clamp. However, when the driving force of the electric trigger device is insufficient, the compressed elastic member pushes the connecting rod as a whole under the action of its own elastic force, and the connecting rod links the first and second driven shafts to rotate synchronously, ultimately achieving the effect of the first lifting arm and the second lifting arm synchronously lifting the safety clamp.

[0042] 3. By adjusting the relative position of the bolt adjustment seat on the connecting rod, the compression of the spring can be adjusted, so that the compression of the elastic member can be adjusted according to the actual pulling force required by the safety gear, making the setting of the elastic member more flexible and the overall practicality higher;

[0043] 4. The auxiliary support seat as a whole plays a secondary protection role. When the bolts of the mounting part are loose or fall off, the mounting part will be separated along the connecting rod under the elastic force of the elastic part. At this time, the auxiliary support seat is in the moving path of the mounting part. The auxiliary support seat can provide auxiliary support for the elastic part and limit the mounting part from moving further on the connecting rod.

[0044] 5. By adjusting the support bolts, the support bolts can be in direct contact with the mounting parts. When the mounting parts are separated from the base due to loosening or falling off of the bolts, the support bolts can provide auxiliary support to the mounting parts in time, so that the overall installation stability of the driving parts can be greatly improved;

[0045] 6. The limit assembly replaces the electric trigger device to limit the rotation angle of the first driven shaft. When the driving force of the electric trigger device is insufficient, the compressed elastic member will push the connecting rod as a whole under the action of its own elastic force, ultimately driving the first lifting arm and the second lifting arm to synchronously lift the safety clamp. However, the elastic member cannot limit the rotation angle and rotation stroke of the first driven shaft. At this time, the limit assembly replaces the electric trigger device to limit the rotation angle of the first driven shaft, so that the lifting action of the first lifting arm and the second lifting arm can still maintain a high degree of stability.

[0046] 7. Set the first angle and the second angle to further improve the synchronization of the movements of the first lifting arm and the second lifting arm, wherein the angle value of the first angle is equal to the angle value of the second angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0049] Figure 1 Schematic diagram of the specific structure of the pulling mechanism in an embodiment of the present invention;

[0050] Figure 2 yes Figure 2 Schematic diagram of the specific structure of the middle limit assembly;

[0051] Figure 3 is a schematic diagram of the specific structure of the linkage component in an embodiment of the present invention;

[0052] Figure 4 1 is a schematic diagram of the rotation angles of the first lifting assembly and the second lifting assembly in an embodiment of the present invention;

[0053] Figure 5 Schematic diagram of the specific structure of the blocking member in an embodiment of the present invention;

[0054] Figure 6 2 is a side view of a stopper in an embodiment of the present invention.

[0055] Description of reference numerals:

[0056] 10. Base body; 20. First lifting assembly; 201. First driven shaft; 202. First lifting arm; 30. Second lifting assembly; 301. Second driven shaft; 302. Second lifting arm; 40. Rocker arm; 41. Connecting rod; 42. Threaded section; 43. Bolt adjustment seat; 50. Electric trigger device; 501. Control arm; 51. Elastic member; 60. Mounting member; 601. Mounting plate; 70. Auxiliary support seat; 701. Movable hole; 702. Support bolt; 80. Mounting seat; 801. Limiting member; A. First angle; B. Second angle; 90. Lifting rod; 91. Safety clamp; 92. Stopper; 921. Slide groove; 922. Guide surface; 93. Guide rail. DETAILED DESCRIPTION

[0057] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0058] Existing safety lifting devices have difficulty achieving the effect of simultaneously lifting the left and right safety clamps, resulting in the problem of asynchronous braking of the left and right safety clamps. When the elevator is overspeeding, the relative displacement of the two sides will be greatly magnified, causing the safety clamps to tilt severely to the left and right when braking. Based on this, the present invention provides a lifting mechanism, a lifting device, and an elevator, aiming to solve the problem that the lifting mechanism in the prior art cannot lift the safety clamps simultaneously. The specific solution is as follows:

[0059] Reference Figure 1 As shown in FIG2 , a lifting mechanism includes a first lifting assembly 20 and a second lifting assembly 30 disposed on a base 10. The lifting mechanism further includes 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 lifting assembly 20 to rotate, the first lifting assembly 20 is linked to the second lifting assembly 30 via the linkage assembly, and the driving member drives the first lifting assembly 20 and the second lifting assembly 30 to lift synchronously.

[0060] Specifically, the first lifting component 20 and the second lifting component 30 are linked by the linkage component, so that when the driving part is working, the first lifting component 20 and the second lifting component 30 can synchronously perform lifting actions. When the lifting mechanism is applied to the elevator equipment as a whole, the first lifting component 20 and the second lifting component 30 are connected to the safety clamps 91 on both sides of the elevator. When the elevator has an overspeed problem, the driving part will start and link the first lifting component 20 and the second lifting component 30 through the linkage component to synchronously lift the safety clamps 91 on both sides, thereby safely braking the car, which solves the problem in the prior art that the lifting mechanism cannot lift the safety clamps 91 at the same time, and the overall safety of the lifting mechanism is higher.

[0061] In one embodiment, the first lifting assembly 20 and the second lifting assembly 30 are further refined. The first lifting assembly 20 includes a first driven shaft 201 and a first lifting arm 202 disposed on the first driven shaft 201. The second lifting assembly 30 includes a second driven shaft 301 and a second lifting arm 302 disposed on the second driven shaft 301. Both the first driven shaft 201 and the second driven shaft 301 are rotatably connected to the base 10.

[0062] It should be noted that the first lifting arm 202 and the second lifting arm 302 are action output components, and the driving member is connected to the first driven shaft 201. When the driving member is working, it will drive the first driven shaft 201 and synchronously link the second driven shaft 301 to rotate through the linkage component. The first driven shaft 201 and the second driven shaft 301 synchronously drive the corresponding first lifting arm 202 and the second lifting arm 302 to rotate, and finally perform a lifting action.

[0063] In one embodiment, the linkage assembly is further refined and includes a rocker arm 40 and a connecting rod 41 , wherein two rocker arms 40 are provided, respectively disposed on the first driven shaft 201 and the second driven shaft 301 , and both ends of the connecting rod 41 are connected to the two rocker arms 40 .

[0064] Specifically, in this embodiment, the rocker arm 40 corresponding to the first driven shaft 201 is hinged to the first driven shaft 201 at one end and to the connecting rod 41 at the other end. The rocker arm 40 corresponding to the second driven shaft 301 is hinged to the second driven shaft 301 at one end and to the connecting rod 41 at the other end. The rocker arms 40 are hinged about the same axis of rotation, and the overall structure can be either a quadrilateral or an inverted quadrilateral (transverse Z-shaped) configuration.

[0065] It should be noted that both layouts can achieve synchronous linkage of the first driven shaft 201 and the second driven shaft 301. The specific layout is related to the layout direction of the first lifting arm 202 and the second lifting arm 302. The two layouts are further described below:

[0066] The linkage assembly is arranged in a quadrilateral structure as a whole. At this time, the two rocker arms 40 are on the same side. According to the motion relationship of the quadrilateral structure, when the driving member drives the first driven shaft 201 to rotate, the second driven shaft 301 will be synchronously linked through the rocker arm 40 and the connecting rod 41. At this time, the rotation direction of the second driven shaft 301 is the same as the rotation direction of the first driven shaft 201. 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 the same side. For example, the first lifting arm 202 needs to be set on the left side of the first driven shaft 201, and the second lifting arm 302 also needs to be set on the left side of the second driven shaft 301.

[0067] Reference Figure 3 As shown, the linkage assembly is arranged in an inverted quadrilateral (transverse Z-shaped) structure. At this time, the two rocker arms 40 are as shown in FIG. Figure 3 As shown, it is set up in reverse. When the driving member drives the first driven shaft 201 to rotate, the second driven shaft 301 will be synchronously linked through the rocker arm 40 and the connecting rod 41. At this time, the rotation direction of the second driven shaft 301 is opposite to the rotation direction of the first driven shaft 201. 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 set on the left side of the first driven shaft 201, and the second lifting arm 302 also needs to be set on the right side of the second driven shaft 301.

[0068] It should be noted that when this lifting mechanism is applied to elevator equipment, since the guide rails 93 of the elevator equipment are generally arranged on both sides of the car, in this embodiment, the first lifting component 20 and the second lifting component 30 are arranged on the base body 10 in a mirror-symmetrical manner, and the two rocker arms 40 are arranged in opposite directions, and the linkage and rotation directions of the first driven shaft 201 and the second driven shaft 301 are opposite.

[0069] More preferably, in this embodiment, in order to further optimize the structural layout of the linkage assembly, the arrangement of the two rocker arms 40 is further refined. The axis of the first driven shaft 201 and the axis of the second driven shaft 301 have a midpoint, and the two rocker arms 40 are symmetrically arranged with the midpoint as the origin. Through such a structural arrangement, the linkage assembly as a whole presents a Z-shaped origin-symmetrical structure. When the driving member drives the first driven shaft 201 to rotate, the linkage assembly can not only simultaneously link the second driven shaft 301, but also achieve a high synchronization effect in the rotation rate of the second driven shaft 301 and the first driven shaft 201, thereby improving the overall structural stability of the linkage assembly.

[0070] In one embodiment, the driving member includes an electric trigger device 50, which includes a control arm 501. The control arm 501 is connected to the first driven shaft 201. The electric trigger device 50 drives the first driven shaft 201 to rotate via the control arm 501. Specifically, after receiving an action signal, the electric trigger device 50 drives the control arm 501 to swing. The swinging of the control arm 501 drives the first driven shaft 201 to rotate, ultimately achieving the effect of driving the first driven shaft 201 to rotate synchronously with the second driven shaft 301.

[0071] To further enhance the driving stability of the driver, the driver also includes an elastic member 51. The elastic member 51 is compressed, and its elastic force drives the connecting rod 41 to rotate in conjunction with the first driven shaft 201 and the second driven shaft 301. Specifically, a mounting member 60 for mounting a spring is fixed to the base 10. The mounting member 60 includes a cantilevered mounting plate 601. The connecting rod 41 passes through the mounting plate 601, and one side of the mounting plate 601 abuts against the spring. The elastic member 51 includes a spring, which is wound around the outside of the connecting rod 41.

[0072] For example, when the lifting mechanism is used in an elevator, under normal use, the first lifting arm 202 and the second lifting arm 302 are both at their lowest positions. At this time, the electric trigger device 50 locks the first driven shaft 201. When the car overspeeds and requires braking, the electric trigger device 50 releases the lock on the first driven shaft 201. Under normal circumstances, the electric trigger device 50 drives the first driven shaft 201 and the second driven shaft 301 to lift the safety gear 91. However, if the driving force of the electric trigger device 50 is insufficient, the elevator's safety gear 91 will be unable to lift, posing a fatal risk to the operation of the elevator.

[0073] The elastic member 51 provides an additional driving method for the lifting mechanism. When the elevator overspeeds and requires braking, but the electric trigger device 50 lacks sufficient driving force, the electric trigger device 50 releases the lock on the first driven shaft 201. However, the electric trigger device 50 is unable to rotate the first driven shaft 201. The compressed elastic member 51, under its own elastic force, pushes the connecting rod 41 to move as a whole. The connecting rod 41 then synchronizes the rotation of the first and second driven shafts 201 and 301, ultimately achieving the effect of synchronously lifting the safety clamp 91 by the first and second lifting arms 202 and 302.

[0074] Furthermore, in one embodiment, the elastic member 51 is the primary driving component for moving the connecting rod 41, while the electric trigger device 50 is the position limiting component. During normal elevator operation, the first lifting arm 202 and the second lifting arm 302 are both at their lowest point. At this point, the electric trigger device 50 drives the control arm 501, causing it to generate a thrust greater than that of the elastic member 51. This thrust is directed in the opposite direction of the elastic force of the elastic member 51. This thrust overcomes the elastic force of the elastic member 51, maintaining the relative positions of the first lifting arm 202 and the second lifting arm 302, and thereby limiting the movement of the connecting rod 41 under the elastic force of the elastic member 51. When the car is overspeeding and needs to be braked, the electric trigger device 50 releases the force on the control arm 501, thereby releasing the locking state of the first driven shaft 201. At this time, the elastic member 51 is no longer restricted by the thrust of the control arm 501. The elastic member 51 will push the connecting rod 41 to transmit the first lifting arm 202 and the second lifting arm 302 to lift, ultimately achieving the effect of braking and deceleration.

[0075] More preferably, in this embodiment, the connecting rod 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 tightly pressed against the bolt adjustment seat 43 .

[0076] Specifically, one end of the spring is fixed relative to the seat body 10, and the other end is tightly pressed against the bolt adjustment seat 43. Therefore, by adjusting the relative position of the bolt adjustment seat 43 on the connecting rod 41, the compression of the spring can be adjusted. With this structural arrangement, the compression of the elastic member 51 can be adjusted according to the actual pulling force required by the safety gear 91, making the arrangement of the elastic member 51 more flexible and improving overall practicality.

[0077] More preferably, in this embodiment, an auxiliary support seat 70 is fixedly provided on the seat body 10, and the auxiliary support seat 70 is located on the side of the mounting member 60 facing away from the spring. A movable hole 701 for the connecting rod 41 to pass through is provided on the auxiliary support seat 70, and the auxiliary support seat 70 is arranged close to the mounting member 60.

[0078] The auxiliary support seat 70 as a whole serves as a secondary protection. When the bolts of the mounting member 60 become loose or fall off, the mounting member 60 will detach along the connecting rod 41 under the elastic force of the elastic member 51. At this time, the auxiliary support seat 70 is in the movement path of the mounting member 60. The auxiliary support seat 70 can provide auxiliary support for the elastic member 51, limiting the mounting member 60 from continuing to move on the connecting rod 41. Furthermore, in this embodiment, a support bolt 702 is threadedly connected to the auxiliary support seat 70, and the stud end of the support bolt 702 abuts against the mounting member 60. By adjusting the support bolt 702, the support bolt 702 can be directly contacted with the mounting member 60. When the mounting member 60 detaches from the base body 10 due to loosening or falling off of the bolts, the support bolt 702 can promptly provide auxiliary support for the mounting member 60, thereby greatly improving the overall installation stability of the driver.

[0079] Preferably, in this embodiment, the lifting mechanism further includes a limiter assembly for limiting the rotation angle of the first driven shaft 201. The limiter assembly is disposed on the base 10, and the limiter assembly is capable of limiting the rotation angle of the first driven shaft 201. The lifting stroke of the first lifting arm 202 is related to the rotation angle of the first driven shaft 201. Under normal circumstances, the rotation angle of the first driven shaft 201 is determined by the driving stroke of the driver. By presetting the driving stroke of the driver, the lifting stroke of the first lifting arm 202 can be set.

[0080] However, in actual work, if the driving force of the electric trigger device 50 is insufficient, the elastic member 51 in a compressed state will push the connecting rod 41 to move as a whole under the action of its own elastic force, and finally drive the first lifting arm 202 and the second lifting arm 302 to synchronously lift the safety clamp 91, but the elastic member 51 cannot limit the rotation angle and rotation stroke of the first driven shaft 201. At this time, the limit assembly replaces the electric trigger device 50 to limit the rotation angle of the first driven shaft 201, so that the lifting action of the first lifting arm 202 and the second lifting arm 302 can still have a high stability.

[0081] In this embodiment, the limiter assembly is further refined. It includes a mounting base 80, a rotating member, and a limiter 801. To optimize the overall structure, in this embodiment, the rotating member is a rocker arm 40 mounted on the first driven shaft 201, and two limiters 801 limit the rotational range of the rocker arm 40. Two limiters 801 are provided on the mounting base 80, both located within the rotational range of the rocker arm 40, limiting the rotational range of the rocker arm 40.

[0082] Reference Figure 4As shown, it should be noted that when the lifting mechanism is in the initial state, the first lifting arm 202 is tilted downward, and the rocker arm 40 abuts against the limit piece 801 on the right. At this time, the first lifting arm 202 forms a first angle A with the horizontal plane; when the lifting mechanism is in the lifting state, the first lifting arm 202 rotates upward driven by the first driven shaft 201, and the first lifting arm 202 is tilted upward, and the rocker arm 40 abuts against the limit piece 801 on the left. At this time, the first lifting arm 202 forms a second angle B with the horizontal plane.

[0083] Preferably, to further ensure synchronization between the movements of the first lifting arm 202 and the second lifting arm 302, in this embodiment, the first angle A and the second angle B are equal. Furthermore, because the first lifting arm 202 moves synchronously with the rotation of the first driven shaft 201, the effective travel of the first driven shaft 201 in driving the first lifting arm 202 is 180 degrees. Therefore, the value of the first angle A is limited to 90 degrees or less. In this embodiment, the value of the first angle A is 45 degrees.

[0084] Taking the first lifting arm 202 as an example, when the first lifting arm 202 is in its initial state, it is tilted downward as a whole, and the rotating member abuts the right limit member 801, forming a first angle A. When the first lifting arm 202 rotates to the middle of its entire movement, the first lifting arm 202 is horizontal. When the first lifting arm 202 completes the entire lifting movement, the lifting mechanism is in the lifting state, at which point the rotating member abuts the left limit member 801.

[0085] More preferably, in this embodiment, the limiting member 801 includes a limiting bolt that is threadedly connected to the mounting base 80. The limiting bolt is adjustable, and the operator can adjust the position of the limiting bolt according to the required lifting stroke of the safety gear 91 by rotating the limiting bolt to adjust the distance between the two limiting bolts.

[0086] Reference Figure 1 、 Figure 2 The present invention further provides a lifting device, comprising the lifting mechanism mentioned in the above scheme, and the lifting device further comprises a lifting rod 90 and a safety clamp 91. Among them, one end of the lifting rod 90 is connected to the lifting member, and the other end is connected to the safety clamp 91.

[0087] In this embodiment, the lifting device is used as an example for an elevator. The base 10 is the two horizontal beams on the top of the elevator car. Safety braking of the elevator is achieved by lifting the safety clamps 91. In this embodiment, the safety clamps 91 are connected to the two guide rails 93 of the elevator, and the two safety clamps 91 are connected to the two lifting assemblies via lifting rods 90. When the elevator needs to brake safely, the driver in the lifting mechanism is activated, driving the first driven shaft 201 to rotate, ultimately achieving synchronous lifting of the safety clamps 91. This solves the problem of the lifting mechanism in the prior art that the safety clamps 91 cannot be lifted simultaneously, and the overall system has higher safety and stability.

[0088] Reference Figure 5 as well as Figure 6 As shown, it is more preferable that, in this embodiment, a stopper 92 is provided on the top of the safety clamp 91, and the stopper 92 covers the jaws of the safety clamp 91. A chute 921 that fits with the guide rail 93 is provided on one side of the stopper 92. The stopper 92 serves to block foreign matter such as sand and gravel, preventing foreign matter from falling from above into the jaws of the safety clamp 91, thereby improving the braking stability of the safety clamp 91. In addition, in this embodiment, the outer side of the stopper 92 includes a fitting surface that fits with the guide rail 93 and a guide surface 922 that is inclined from top to bottom in a direction away from the chute. The guide surface 922 guides debris to roll away from the jaws. Specifically, in this embodiment, three guide surfaces 922 are provided, and the three guide surfaces 922 and the fitting surface form the four outer side surfaces of the stopper 92.

[0089] In addition, in order to facilitate the operator to install the block 92 onto the lifting rod 90, in this embodiment, the block 92 is split into two halves from the middle of the slide groove 921. When installing the block 92, the block 92 split into two halves is merged, and the lifting rod 90 is clamped in the middle. During the installation process, it is necessary to correspond to the jaws of the safety clamp 91. After the block 92 is installed in place as a whole, the block 92 can be fixed as a whole by bolt connection.

[0090] The present invention also provides an elevator including the aforementioned lifting device. When the elevator overspeeds, the driving element of the lifting mechanism activates and, through a linkage assembly, the first lifting assembly 20 and the second lifting assembly 30 to simultaneously lift the safety clamps 91 on both sides, thereby safely braking the car. This solves the problem of the lifting mechanism in the prior art being unable to simultaneously lift the safety clamps 91, and provides a higher level of overall safety.

[0091] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

[0093] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0094] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. 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, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0095] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0096] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0097] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

Claims

1. A lifting mechanism, characterized in that: It comprises a first lifting component (20) and a second lifting component (30) arranged on a base body (10); The lifting mechanism further comprises a driving member and a linkage assembly, wherein 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), 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); When the driving member drives the first lifting component (20) to rotate, the first lifting component (20) is synchronously linked to the second lifting component (30) through the linkage component; a limiting assembly, the limiting assembly being arranged on the seat body (10) to limit the rotation angle of the first driven shaft (201), the limiting assembly comprising a rotating member and a limiting member (801), the rotating member being a rocker arm (40) arranged on the first driven shaft (201); When the lifting mechanism is in an initial state, the first lifting arm (202) is in a relaxed state, the rotating member abuts against one of the limiting members (801), and the first lifting arm (202) forms a first angle (A) with the horizontal plane; When the lifting mechanism is in the lifting state, the first lifting arm (202) is lifted upwards driven by the first driven shaft (201), the rotating member abuts against the other limiting member (801), and the first lifting arm (202) forms a second angle (B) with the horizontal plane; The first angle (A) is equal to the second angle (B).

2. The lifting mechanism according to claim 1, characterized in that: The first driven shaft (201) and the second driven shaft (301) are both rotatably connected to the base body (10).

3. The lifting mechanism according to claim 2, characterized in that: The linkage assembly includes a rocker arm (40) and a connecting rod (41); Two rocker arms (40) are provided, and are respectively provided on the first driven shaft (201) and the second driven shaft (301); Both ends of the connecting rod (41) are respectively connected to the two rocker arms (40).

4. The lifting mechanism according to claim 3, characterized in that: The first lifting component (20) and the second lifting component (30) are arranged on the base (10) in a mirror-symmetrical manner; The axis of the first driven shaft (201) and the axis of the second driven shaft (301) have a midpoint, and the two rocker arms (40) are symmetrically arranged with the midpoint as the origin; When the first driven shaft (201) rotates, the second driven shaft (301) is linked to rotate synchronously via the connecting rod (41), and the rotation directions of the first driven shaft (201) and the second driven shaft (301) are opposite.

5. The lifting mechanism according to claim 3, characterized in that: The driving member includes an electric triggering device (50); The electric triggering device (50) comprises a control arm (501), the control arm (501) is connected to the first driven shaft (201), and the electric triggering device (50) drives the first driven shaft (201) to rotate via the control arm (501).

6. The lifting mechanism according to claim 3 or 5, characterized in that: The driving member includes an elastic member (51); The elastic member (51) is in a compressed state, 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).

7. The lifting mechanism according to claim 6, characterized in that: The seat body (10) is provided with a mounting member (60) for mounting and fixing the elastic member (51), the connecting rod (41) is passed through the mounting member (60), and one side of the mounting member (60) is connected to the elastic member (51); The connecting rod (41) comprises a threaded section (42), the threaded section (42) is threadedly connected to a bolt adjustment seat (43), and the end of the elastic member (51) is tightly pressed on the bolt adjustment seat (43).

8. The lifting mechanism according to claim 7, characterized in that: An auxiliary support seat (70) is provided on the seat body (10), and the auxiliary support seat (70) is located on a side of the mounting member (60) facing away from the elastic member (51); A support bolt (702) is threadedly connected to the auxiliary support seat (70), and the stud end of the support bolt (702) abuts against the mounting member (60).

9. The lifting mechanism according to claim 1, wherein the rotating member is provided on the first driven shaft (201), and the rotating member rotates synchronously with the first driven shaft (201); Two limiting members (801) are provided, and both limiting members (801) are located on the rotation stroke of the rotating member. The two limiting members (801) limit the rotation range of the rotating member.

10. A lifting device, characterized in that: The lifting device comprises the lifting mechanism according to any one of claims 1 to 9, wherein the lifting device further comprises a lifting rod (90) and a safety clamp (91); One end of the lifting rod (90) is connected to the lifting mechanism, and the other end is connected to the safety clamp (91).

11. The lifting device according to claim 10, characterized in that: A stopper (92) is provided on the top of the safety clamp (91), and the stopper (92) covers the jaws of the safety clamp (91). A sliding groove (921) is provided on one side of the stopper (92) and is fitted with a guide rail (93).

12. The lifting device according to claim 11, characterized in that: The outer side of the stopper (92) includes a fitting surface fitted with the guide rail (93) and a guide surface (922) inclined from top to bottom in a direction away from the slide groove, and the guide surface (922) guides debris to roll away from the jaws.

13. An elevator, characterized in that: The invention comprises the pulling device described in any one of claims 10-11.

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