A new type of traction belt end connection device

Abstract

The present invention relates to a new type of traction belt end connection device, which includes a support plate fixedly arranged; a rod body passing through the support plate and connected to the traction belt, and a limiting member is arranged at the upper end of the rod body; a support body supported above the support plate and sleeved outside the rod body, and a cavity is formed in the support body; a trigger switch connected to the support body and in contact with the support plate; a first spring sleeved outside the rod body and located between the limiting member and the support body; a second spring located in the cavity of the support body and pressing between the top of the cavity and the support plate, and the elastic force of the second spring is greater than the self-weight of the traction belt. This new type of traction belt end connection device can be free from the influence of the fluctuation of the spring compression amount and avoid false alarms of the pre-bumping signal.

Description

Technical Field

[0001] The invention relates to the technical field of elevators, and in particular to a novel traction belt termination device. Background Art

[0002] Elevator safety is an important issue in elevator applications, and the anti-top collision problem of elevators is an important safety issue in elevator use. In the prior art, an anti-top collision device is set in the elevator to prevent the problem of elevator top collision. Figure 1 The structure shown is an anti-top-collision device commonly used in the prior art, which includes a rod body 100 connected to a rope head assembly, a spring 200 sleeved on the rod body 100, and a trigger switch 300 fixedly connected to the rod body 100 and located at the upper end of the spring 200, wherein the rope head assembly is connected to the counterweight in the elevator. During operation, when the car is about to top-collide, the counterweight will squat to the bottom, and the force on the rope head assembly will be reduced. Correspondingly, under the action of the reset tension of the spring 200, the rod body 100 is driven to move upward, so that the rod body 100 drives the trigger switch 300 to move upward, and the switch signal of the trigger switch 300 changes to transmit the situation of the car pre-collision, thereby controlling the elevator to brake and stop. During the operation of the elevator, the compression of the spring 200 will fluctuate due to vibration. Especially when running at high altitudes, the fluctuation range of the compression of the spring 200 will be greater. Since the position of the trigger switch 300 changes directly with the compression of the spring 200, the trigger switch 300 is prone to be activated due to the change in compression of the spring 200 due to fluctuations during operation, thereby causing a false alarm of the car hitting the roof.

[0003] The Chinese utility model patent "Construction Elevator Pre-roofing Device" with authorization announcement number CN201914800U (application number 201120025906.0) adopts the aforementioned structure. The construction elevator is also prone to false alarms of car roofing during operation. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a new type of traction belt termination device which is not affected by the fluctuation of spring compression and avoids false alarm of pre-punch top signal in view of the above-mentioned prior art.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a new type of traction belt termination device, characterized in that: it includes:

[0006] A support plate, fixedly arranged;

[0007] A rod body is inserted into the support plate and connected to the traction belt, and a limiting member is arranged at the upper end of the rod body;

[0008] The support body is supported above the support plate and sleeved outside the rod body, and there is a cavity inside the support body;

[0009] The trigger switch is connected to the support body and contacts the support plate;

[0010] The first spring is sleeved outside the rod body and is located between the limiting member and the support body;

[0011] The second spring is located inside the cavity of the support body and is pressed between the top of the cavity and the support plate, and the elastic force of the second spring is greater than the self-weight of the traction belt.

[0012] In order to effectively ensure the deformation direction of the second spring, the second spring is sleeved on the rod body.

[0013] For the convenience of installation, the upper end of the traction belt is connected with a connecting body for connecting the rod body and the traction belt, and the elastic force of the second spring is greater than the sum of the weights of the traction belt and the connecting body.

[0014] For the convenience of installation, the trigger switch is connected to the upper end face of the support body through a switch bracket.

[0015] Preferably, the trigger switch bracket is a plate body, the plate body is attached to the upper surface of the support body, and there is a perforation on the plate body for the rod body to pass through, and the first spring is located between the limiting member and the plate body.

[0016] Preferably, a thread is provided on the outer peripheral surface of the upper end of the rod body, and the limiting member is a bolt connected to the upper end of the rod body.

[0017] Compared with the prior art, the advantages of the present invention are as follows: In the novel traction belt end connection device of the present invention, a support body and a second spring are added. When the elevator car is working normally, the second spring is in a compressed state inside the support body. Even if the compression amount of the second spring fluctuates, the position of the support body relative to the support plate always remains unchanged. Since the trigger switch is connected to the support body, the position of the corresponding trigger switch always remains unchanged. In addition, the fluctuation of the first spring cannot affect the position of the trigger switch. When the car is about to overshoot the top and cause the counterweight to bottom out, the reset elastic force of the second spring will drive the support body to move upward, and then drive the trigger switch to move upward. The trigger switch changes from the state of contacting the support plate to the state of not contacting the support plate, thereby realizing the transmission of the switch action signal and facilitating the control of the elevator to brake and stop. This novel traction belt end connection device can avoid false alarms of the trigger switch for car overshoot due to spring fluctuations and improve the accuracy of car overshoot alarms. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of an anti-overrun device in the prior art.

[0019] Figure 2 This is the structural diagram of the novel traction belt end connection device in the embodiment of the present invention. Specific Embodiments

[0020] The present invention will be further described in detail below in conjunction with the embodiments with reference to the drawings.

[0021] As Figure 2 shown, the novel traction belt end connection device in this embodiment is connected to the traction belt 3. The novel traction belt end connection device includes a support plate 1, a rod body 2, a support body 4, a trigger switch 5, a first spring 6, and a second spring 7.

[0022] One end of the traction belt 3 in the elevator is connected to the car of the elevator, and the other end is connected to a counterweight. The traction belt 3 is wound around a pulley set to realize the lifting and pulling of the car.

[0023] The support plate 1 is fixedly arranged on the wall at the top of the elevator installation space, and the support plate 1 plays a supporting role for the entire novel traction belt end connection device.

[0024] The rod body 2 is passed through the support plate 1 and connected to the traction belt 3. In this embodiment, the rod body 2 and the traction belt 3 are connected by a connecting piece, and the rod body 2 is connected to the end of the traction belt 3 close to the counterweight. Specifically, the connecting piece has a core for the end of the traction belt 3 to be wound around, and the end of the traction belt 3 is fixed by a rope head clamp. The lower end of the rod body 2 can be connected to the connecting piece by a threaded connection.

[0025] A limiting member 21 is arranged at the upper end of the rod body 2. In this embodiment, for convenient assembly, a thread is provided on the outer peripheral surface of the upper end of the rod body 2, and the limiting member 21 is a bolt threadedly connected to the upper end of the rod body 2.

[0026] The support body 4 is supported above the support plate 1 and sleeved outside the rod body 2. The support body 4 has a cavity, and the cavity opens downward.

[0027] The trigger switch 5 is connected to the upper end surface of the support body 4 through a switch bracket 9, and the trigger switch 5 can contact the support plate 1. The trigger switch 5 is electrically connected to the control system of the elevator. Thus, the control system of the elevator can control the operation of the elevator by obtaining the switch signal of the trigger switch 5. The switch bracket 9 is a plate body, which is fixedly attached to the upper surface of the support body 4, and the plate body has a perforation for the rod body 2 to pass through.

[0028] The first spring 6 is sleeved outside the rod body 2 and located between the limiting member 21 and the plate body on the upper surface of the support body 4;

[0029] The second spring 7 is located in the cavity of the support body 4 and sleeved on the rod body 2, so that the deformation direction of the second spring 7 can be effectively guaranteed. The second spring 7 is pressed between the top of the cavity and the support plate 1, and the elastic force of the second spring 7 is greater than the sum of the self-weight of the traction belt 3 and the weight of the connecting body 8. During the normal operation of the elevator car, the second spring 7 is in a compressed state.

[0030] In the novel traction belt end connection device of the present invention, a support body 4 and a second spring 7 are added. When the elevator car is operating normally, the second spring 7 in a compressed state is inside the support body 4. Even if the compression amount of the second spring 7 fluctuates, the position of the support body 4 relative to the support plate 1 always remains unchanged. Since the trigger switch 5 is connected to the support body 4, the position of the corresponding trigger switch 5 always remains unchanged. In addition, the fluctuation of the first spring 6 also cannot affect the position of the trigger switch 5. When the car is about to overrun the top and cause the counterweight to bottom out, the reset elastic force of the second spring 7 will drive the support body 4 to move upward, and then drive the trigger switch 5 to move upward. The trigger switch 5 changes from the state of contacting the support plate 1 to the state of not contacting the support plate 1, thereby realizing the transmission of the switch action signal and facilitating the control of the elevator to brake and stop. This novel traction belt end connection device can avoid false alarms of the trigger switch 5 for car overrunning the top caused by spring fluctuations and improve the accuracy of car overrunning the top alarm.

Claims

1. A novel traction belt end connection device, characterized in that: including a support plate (1), fixedly arranged; a rod body (2), passing through the support plate (1) and connected to a traction belt (3), and a limiting member (21) is arranged at the upper end of the rod body (2); a support body (4), supported above the support plate (1) and sleeved outside the rod body (2), and a cavity is formed inside the support body (4); a trigger switch (5), connected to the support body (4) and in contact with the support plate (1); a first spring (6), sleeved outside the rod body (2) and located between the limiting member (21) and the support body (4); a second spring (7), sleeved on the rod body (2), the second spring (7) is located inside the cavity of the support body (4) and is pressed between the top of the cavity and the support plate (1); the upper end of the traction belt (3) is connected with a connecting body (8) for connecting the rod body (2) and the traction belt (3), and the elastic force of the second spring (7) is greater than the sum of the weights of the traction belt (3) and the connecting body (8); when the elevator car is working normally, the second spring (7) is in a compressed state and inside the support body (4), and the position of the support body (4) relative to the support plate (1) always remains unchanged; when the car is about to overshoot the top and cause the counterweight to bottom out, the reset elastic force of the second spring (7) will drive the support body (4) to move upward, and then drive the trigger switch (5) to move upward, and the trigger switch (5) changes from the state of contacting the support plate (1) to the state of not contacting the support plate (1), thereby realizing the transmission of the switch action signal.

2. The novel traction belt end connection device according to claim 1, characterized in that: The trigger switch (5) is connected to the upper end surface of the support body (4) through a switch bracket (9).

3. The novel traction belt end connection device according to claim 2, wherein: The trigger switch bracket (9) is a plate body, the plate body is attached to the upper surface of the support body (4), and a through hole for the rod body (2) to pass through is formed on the plate body, and the first spring (6) is located between the limiting member (21) and the plate body.

4. The novel traction belt end connection device according to claim 1, characterized in that: Threads are provided on the outer peripheral surface of the upper end of the rod body (2), and the limiting member (21) is a bolt connected to the upper end of the rod body (2).

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