CN207658889U - A kind of electromagnetic type triggering safety tongs - Google Patents

Abstract

The utility model discloses an electromagnetic trigger safety gear, which comprises a safety gear and an electromagnetic trigger device. The electromagnetic trigger device includes a mounting plate and an electromagnetic trigger mechanism. The safety gear includes a shell, a linkage plate, and two symmetrically arranged The caliper body and the brake mechanism located between the 2 caliper bodies. The electromagnetic trigger mechanism includes an electromagnet, a swing rod and a threaded pin shaft. The utility model has a simple structure and a reasonable design. By controlling the power on and off of the electromagnet, the The position and state of the swing rod, and then control the brake mechanism of the elevator safety gear. The brake mechanism adopts the reset type roller caliper. The dynamic effect is obvious and reliable, which greatly improves the emergency braking effect of the elevator out of control, and improves the safety of the elevator.

Description

An electromagnetic trigger safety gear

technical field

The utility model relates to the field of elevator safety, in particular to an electromagnetic trigger safety gear.

Background technique

Safety gear has been widely used in the elevator field. The elevator safety gear device is controlled by the speed limiter. When the elevator speed exceeds the limit speed set by the elevator speed limiter, or when the suspension rope breaks and relaxes, it will A safety device in which the car stops in an emergency and is clamped on the guide rail. Most of the existing safety gears are activated by mechanical triggering (the mechanical triggering mechanism is mostly composed of a safety gear lever, a speed limiter wire rope, a tensioning wheel, a speed limiter, and a rope clamp, and the overall structure is relatively large), while the mechanical trigger The shortcomings of large size and cumbersome use are common, and the response is not fast enough, which seriously affects the braking of the elevator when it is overspeed, and the wear and failure rate are generally high, which is not conducive to the improvement of elevator safety.

Utility model content

In view of the above problems, the utility model discloses an electromagnetic trigger safety gear.

For solving above technical problem, the technical scheme that the utility model provides is:

An electromagnetic trigger safety gear, comprising a safety gear and an electromagnetic trigger device, characterized in that the electromagnetic trigger device includes a mounting plate and an electromagnetic trigger mechanism, and the electromagnetic trigger mechanism is fixed on one side of the safety gear through the mounting plate;

The safety tongs include a housing, a linkage plate, two tong bodies symmetrically arranged on the housing, and a braking mechanism between the two tong bodies. The tong bodies are in the shape of a right-angled trapezoid, and the two tong bodies are opposite One side is a guide slope, and the braking mechanism is composed of two sets of symmetrically arranged braking units. The braking unit includes a pull rod, a roller clamp and a roller frame for protecting the roller clamp. The pull rod is composed of a connecting rod and an elastic rod. , the connecting rod and the elastic rod are of an integrated structure, the lower end of the connecting rod is fixedly connected with the central axis of the roller pliers, the elastic rod is bent in a 7-shape, the lower end is connected with the upper end of the connecting rod, and the upper end is connected with the linkage plate One end is fixedly connected, the roller pliers are arranged close to the guide slope, and the roller frame is fixedly connected to the housing; the safety pliers are used for emergency braking of the elevator, and the roller pliers are symmetrically arranged on both sides of the elevator guide rail;

The mounting plate is an L-shaped folding plate, including a first fixing plate for connecting the safety gear and a second fixing plate for fixing the electromagnetic trigger mechanism, and the electromagnetic trigger mechanism includes an electromagnet, a swing rod and a threaded pin , the electromagnet and the threaded pin shaft are respectively arranged on the horizontal sides of the second fixed plate, and one side of the electromagnet is fixedly provided with a connecting plate, and the connecting plate is fixedly connected with the second fixed plate by bolts, thereby realizing the connection between the electromagnet and the second fixed plate. Fixed connection of the mounting plate;

The upper end of the electromagnet is a contact, the swing rod is placed horizontally, one end of which is connected with the threaded pin shaft, and is connected with the threaded pin shaft in rotation, and the other end is fixedly connected with the linkage plate, and the lower end surface of the swing rod is connected with the upper surface of the contactor. end contact.

In the aforementioned electromagnetic trigger safety gear, the included angle between the guide slope and the horizontal direction is α, and the α is 78°-83°.

In the aforementioned electromagnetic trigger safety gear, the outer diameter of the roller tongs is the closest distance to the outer side of the elevator guide rail, and the distance L=5mm is the distance that the safety gear needs to be lifted during the braking process of the safety gear. is H, the H, L, and α satisfy tagα=H/L, H=Ltagα, wherein, L=5mm, 78°<α<83°, and the H is between 23.525mm and 40.72mm, that is H _max =40.72mm, H _min =23.525mm, the length of the swing rod parallel to the axial direction of the roller clamp is L ₁ , the L ₁ is 420mm, the linkage plate is parallel to the axial direction of the roller clamp The length is L ₂ , and the L ₂ is 180 mm. During the braking process of the brake caliper, when the swing rod is lifted to the limit position, the angle between the swing rod and the horizontal direction is β, and the distance between the linkage plate and the threaded pin The lifting distance of the farthest end of the shaft is H ₁ , where, tagβ=H ₁ /(L ₁ + L ₂ ), H ₁ =(L ₁ + L ₂ )tagβ, the pull rod contains the elastic rod, during the braking process , the elastic rod will produce elastic deformation, wherein, H ₁ <H, (L ₁ + L ₂ ) tagβ<H, (L ₁ + L ₂ ) tagβ< H _min , β<artg H _min /(L ₁ + L ₂ ), β<artg0.04705=0.047°.

In the aforementioned electromagnetic trigger safety gear, a controller is connected to the electromagnet.

In the aforementioned electromagnetic trigger safety gear, a bayonet pin is provided at the rotational connection between the swing rod and the threaded pin shaft to limit the position of the swing rod.

The above-mentioned electromagnetic trigger safety gear, the working method of the electromagnetic trigger safety gear is as follows: when the elevator goes down out of control, the elevator safety system detects that the elevator is out of control, and then controls the controller to energize the electromagnet, and the electromagnet turns on After power on, the contact lifts up, and then controls the end of the pendulum rod fixedly connected with the linkage plate to lift up, thereby controlling the upward movement of the pull rod, which drives the roller pliers to move along the guide slope, and then the distance between the two roller pliers decreases. , the two roller clamps perform two-way clamping and braking on the guide rails between the two, so that the elevator stops on the guide rails; when the elevator is out of control and is released, the controller stops energizing the electromagnet, the contact drops, and the roller clamps are in the elasticity of the pull rod Reset under action, and drive the pendulum to reset.

In the aforementioned electromagnetic trigger safety gear, the braking force F of the safety gear is determined according to the following expression:

F=(K ₁ S+K ₂ T)a+(K ₃ S+K ₄ T)g

Among them, a is the acceleration of the elevator when it is running, g is the acceleration of gravity, S is the mass of the elevator car when it is empty, T is the rated passenger mass, and the values of K ₁ , K ₂ , K ₃ , and K ₄ are as follows: when the elevator goes up , K ₁ =2, K ₂ =0.6, K ₃ =0, K ₄ =0.6; when the elevator goes down, K ₁ =1, K ₂ =1, K ₃ =1, K ₄ =1.

The beneficial effects of the utility model are:

The utility model discloses an electromagnetic trigger safety gear, which comprises a safety gear and an electromagnetic trigger device. The electromagnetic trigger device includes a mounting plate and an electromagnetic trigger mechanism. The safety gear includes a shell, a linkage plate, and two symmetrically arranged The caliper body and the brake mechanism located between the 2 caliper bodies. The electromagnetic trigger mechanism includes an electromagnet, a swing rod and a threaded pin shaft. The utility model has a simple structure and a reasonable design. By controlling the power on and off of the electromagnet, the The position and state of the swing rod, and then control the brake mechanism of the elevator safety gear. The brake mechanism adopts the reset type roller caliper. The dynamic effect is obvious and reliable, which greatly improves the emergency braking effect of the elevator out of control, and improves the safety of the elevator.

Description of drawings

Fig. 1 schematic diagram of the utility model.

Figure 2 is the top view of the utility model.

Figure 3 Side view of the safety gear.

Detailed ways

An electromagnetic trigger safety gear as shown in the figure includes a safety gear 1 and an electromagnetic trigger device, wherein the electromagnetic trigger device includes a mounting plate 2 and an electromagnetic trigger mechanism, and the electromagnetic trigger mechanism is fixed by the mounting plate 2 set on one side of the safety gear 1;

The safety gear 1 includes a housing 3, a linkage plate 4, two pliers 5 symmetrically arranged on the housing 3, and a braking mechanism 6 between the two pliers 5, the caliper 5 is a right-angle ladder The opposite side of the two caliper bodies 5 is a guide slope 7, and the braking mechanism 6 is composed of two sets of symmetrically arranged braking units 61. The braking unit 61 includes a pull rod 8, a roller clamp 9 and a protective roller The roller frame 10 of the pliers 9, the pull rod 8 is composed of a connecting rod 81 and an elastic rod 82, the connecting rod 81 and the elastic rod 82 are of an integrated structure, and the lower end of the connecting rod 81 is fixed to the central axis of the roller pliers 9 connection, the elastic rod 82 is bent in a 7-shape, its lower end is connected with the upper end of the connecting rod 81, and its upper end is fixedly connected with one end of the linkage plate 4, the roller clamp 9 is set close to the guide slope 7, and the roller frame 10 and The housing 3 is fixedly connected; the safety pliers are used for emergency braking of the elevator, and the roller pliers are symmetrically arranged on both sides of the elevator guide rail;

The mounting plate 2 is an L-shaped folding plate, including a first fixing plate 21 for connecting the safety gear 1 and a second fixing plate 22 for fixing an electromagnetic trigger mechanism, and the electromagnetic trigger mechanism includes an electromagnet 11, a pendulum Rod 12 and threaded pin shaft 13, described electromagnet 11 and threaded pin shaft 13 are respectively arranged on the horizontal both sides of the second fixed plate 22, and one side of electromagnet 11 is fixedly provided with connecting plate 14, and described connecting plate 14 is passed through bolt It is fixedly connected with the second fixed plate 22, thereby realizing the fixed connection between the electromagnet 11 and the mounting plate 2;

The upper end of the electromagnet 11 is a contact 15, the swing rod 12 is placed horizontally, one end is connected with the threaded pin shaft 13, and is connected in rotation with the threaded pin shaft 13, and the other end is fixedly connected with the linkage plate 4, the swing rod 12 The lower end surface of the contactor 15 is in contact with the upper end surface.

The aforementioned electromagnetic trigger safety gear, wherein, the included angle between the guide slope 7 and the horizontal direction is α, and the α is 78°-83°.

The aforementioned electromagnetic trigger safety gear is characterized in that the outer diameter of the roller tongs is the shortest distance from the outside of the elevator guide rail to the outside of the elevator guide rail, and the L=5mm. During the braking process of the safety gear, the safety gear The distance to be lifted is H, and the distance between H, L, and α satisfies tagα=H/L, H=Ltagα, wherein, L=5mm, 78°<α<83°, and the H is between 23.525mm and 40.72mm between, that is, H _max =40.72mm, H _min =23.525mm, the length of the swing rod and the axial parallel direction of the roller pliers is L ₁ , the L ₁ is 420mm, the linkage plate and the roller pliers The length in the parallel direction of the axial direction is L ₂ , and the L ₂ is 180 mm. During the braking process of the brake caliper, when the swing rod is lifted to the limit position, the angle between the swing rod and the horizontal direction is β, and the distance between the linkage plate The lifting distance of the farthest end of the threaded pin shaft is H ₁ , wherein, tagβ=H ₁ /(L ₁ + L ₂ ), H ₁ =(L ₁ + L ₂ )tagβ, the pull rod includes the elastic rod, During the braking process, the elastic rod will produce elastic deformation, wherein, H ₁ <H, (L ₁ + L ₂ ) tagβ<H, (L ₁ +L ₂ ) tagβ< H _min , β<artg H _min /(L ₁ + L ₂ ), β<artg0.04705=0.047°.

The aforementioned electromagnetic trigger safety gear, wherein the electromagnet 11 is connected with a controller 16 .

In the aforementioned electromagnetic trigger safety gear, a bayonet pin 17 is provided at the rotational connection between the swing rod 12 and the threaded pin shaft 13 to limit the position of the swing rod 12 .

The above-mentioned electromagnetic trigger safety gear 1 has the following working method: when the elevator goes down out of control, the elevator safety system detects that the elevator is out of control, and then controls the controller to energize the electromagnet 11. After the electromagnet 11 is energized, the contact 15 lifts , and then control the lifting of one end of the swing rod 12 fixedly connected with the linkage plate 4 (the other end of the swing rod 12 is connected with the threaded pin shaft 13 in rotation), thereby controlling the upward movement of the pull rod 8, which drives the roller pliers 9 along the The guide slope 7 moves, and then the distance between the two roller clamps 9 decreases, and the two roller clamps 9 perform two-way clamping and braking on the guide rail 18 between the two, so that the elevator stops at the guide rail 18; when the elevator is out of control and is released, The controller stops energizing the electromagnet 11, and the contact 15 descends, and the roller clamp 9 resets under the elastic action of the pull rod 8 simultaneously, and drives the fork 12 to reset.

In the aforementioned electromagnetic trigger safety gear, the braking force F of the safety gear is determined according to the following expression:

F=(K ₁ S+K ₂ T)a+(K ₃ S+K ₄ T)g

Among them, a is the acceleration of the elevator when it is running, g is the acceleration of gravity, S is the mass of the elevator car when it is empty, T is the rated passenger mass, and the values of K ₁ , K ₂ , K ₃ , and K ₄ are as follows: when the elevator goes up , K ₁ =2, K ₂ =0.6, K ₃ =0, K ₄ =0.6; when the elevator goes down, K ₁ =1, K ₂ =1, K ₃ =1, K ₄ =1.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of Any changes or replacements should fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (7)

1. An electromagnetic trigger safety gear, comprising a safety gear and an electromagnetic trigger device, characterized in that, the electromagnetic trigger device comprises a mounting plate and an electromagnetic trigger mechanism, and the electromagnetic trigger mechanism is fixedly arranged on one side of the safety gear through the mounting plate side; The safety tongs include a housing, a linkage plate, two tong bodies symmetrically arranged on the housing, and a braking mechanism between the two tong bodies. The tong bodies are in the shape of a right-angled trapezoid, and the two tong bodies are opposite One side is a guide slope, and the braking mechanism is composed of two sets of symmetrically arranged braking units. The braking unit includes a pull rod, a roller clamp and a roller frame for protecting the roller clamp. The pull rod is composed of a connecting rod and an elastic rod. , the connecting rod and the elastic rod are of an integrated structure, the lower end of the connecting rod is fixedly connected with the central axis of the roller pliers, the elastic rod is bent in a 7-shape, the lower end is connected with the upper end of the connecting rod, and the upper end is connected with the linkage plate One end is fixedly connected, the roller pliers are arranged close to the guide slope, and the roller frame is fixedly connected to the housing; the safety pliers are used for emergency braking of the elevator, and the roller pliers are symmetrically arranged on both sides of the elevator guide rail; The mounting plate is an L-shaped folding plate, including a first fixing plate for connecting the safety gear and a second fixing plate for fixing the electromagnetic trigger mechanism, and the electromagnetic trigger mechanism includes an electromagnet, a swing rod and a threaded pin , the electromagnet and the threaded pin shaft are respectively arranged on the horizontal sides of the second fixed plate, and one side of the electromagnet is fixedly provided with a connecting plate, and the connecting plate is fixedly connected with the second fixed plate by bolts, thereby realizing the connection between the electromagnet and the second fixed plate. Fixed connection of the mounting plate; The upper end of the electromagnet is a contact, the swing rod is placed horizontally, one end of which is connected with the threaded pin shaft, and is connected with the threaded pin shaft in rotation, and the other end is fixedly connected with the linkage plate, and the lower end surface of the swing rod is connected with the upper surface of the contactor. end contact. 2 . The electromagnetic trigger safety gear according to claim 1 , wherein the included angle between the guide slope and the horizontal direction is α, and the α is 78°-83°. 3. An electromagnetic trigger safety gear as claimed in claim 2, characterized in that the outer diameter of the roller tongs is the shortest distance from the outer side of the elevator guide rail to the outer side of the elevator guide rail, and the L=5mm, and the safety gear brakes In the process, the distance that the safety gear needs to be lifted is H, and the distance between H, L, and α satisfies tagα=H/L, H=Ltagα, wherein, L=5mm, 78°<α<83°, the H is between 23.525mm and 40.72mm, that is, H _max =40.72mm, H _min =23.525mm, the length of the swing rod in parallel with the axial direction of the roller clamp is L ₁ , and the L ₁ is 420mm, the The length of the linkage plate parallel to the axial direction of the roller clamp is _L2 , and the _L2 is 180 mm. During the braking process of the safety gear, when the swing lever is lifted to the limit position, the angle between the swing lever and the horizontal direction is β , the lifting distance between the linkage plate and the farthest end of the threaded pin shaft is H ₁ , wherein, tagβ=H ₁ /(L ₁ + L ₂ ), H ₁ =(L ₁ + L ₂ )tagβ, the pull rod Including the elastic rod, during the braking process, the elastic rod will produce elastic deformation, wherein, H ₁ <H, (L ₁ + L ₂ ) tagβ<H, (L ₁ + L ₂ ) tagβ< H _min , β<artg H _min /(L ₁ + L ₂ ), β<artg0.04705=0.047°. 4. An electromagnetic trigger safety gear according to claim 1, characterized in that a controller is connected to the electromagnet. 5 . The electromagnetic trigger safety gear according to claim 1 , wherein a bayonet pin is provided at the rotational connection between the swing rod and the threaded pin shaft to limit the position of the swing rod. 6 . 6. A kind of electromagnetic trigger safety gear as claimed in claim 1, characterized in that, the working method of the electromagnetic trigger safety gear is as follows: when the elevator goes down out of control, the elevator safety system detects that the elevator is out of control, Then control the controller to energize the electromagnet. After the electromagnet is energized, the contact is lifted, and then the end of the pendulum that is fixedly connected with the linkage plate is controlled to be raised, thereby controlling the upward movement of the pull rod, which drives the roller clamp to move along the guide slope. , and then the distance between the two roller clamps is reduced, and the two roller clamps perform two-way clamping and braking on the guide rail between the two, so that the elevator stops at the guide rail; when the elevator out of control is released, the controller stops energizing the electromagnet, The contact drops, and at the same time, the roller pliers reset under the elastic action of the pull rod, and drive the swing rod to reset. 7. A kind of electromagnetic trigger safety gear as claimed in claim 1, is characterized in that, the braking force F of described safety gear is determined according to the following expression: F=(K ₁ S+K ₂ T)a+(K ₃ S+K ₄ T)g Among them, a is the acceleration of the elevator when it is running, g is the acceleration of gravity, S is the mass of the elevator car when it is empty, T is the rated passenger mass, and the values of K ₁ , K ₂ , K ₃ , and K ₄ are as follows: when the elevator goes up , K ₁ =2, K ₂ =0.6, K ₃ =0, K ₄ =0.6; when the elevator goes down, K ₁ =1, K ₂ =1, K ₃ =1, K ₄ =1.