Elevator counterweight device

Abstract

The application discloses an elevator counterweight device, which has a counterweight frame, a counterweight safety clamp and a counterweight wheel, and further has a bearing blocking protection device; the bearing blocking protection device has a wheel shaft baffle, a spring mounting arm, a steel wire rope, a spring upper baffle, a speed limiter steel wire rope baffle, a spring and a spring lower baffle; the wheel shaft baffle plays a positioning role on the wheel shaft; when the counterweight wheel rotates, the wheel shaft and the wheel shaft baffle do not rotate with the counterweight wheel in the normal bearing state, and the wheel shaft and the wheel shaft baffle rotate with the counterweight wheel in the bearing blocking state; the wheel shaft is connected with the spring upper baffle through the steel wire rope; when the wheel shaft and the wheel shaft baffle rotate with the counterweight wheel, the steel wire rope generates horizontal displacement, the spring upper baffle is pulled out of the spring mounting arm, the spring acts upward, and the counterweight safety clamp is lifted.

Description

TECHNICAL FIELD

[0001] The present application relates to the elevator technical field, specifically to a kind of elevator counterweight device with bearing jamming protection device. BACKGROUND

[0002] The elevator counterweight device has a pair of bearing plates for carrying counter sheave, installation hole is opened in bearing plate, the two ends of wheel shaft are respectively inserted in the installation hole of a pair of bearing plates, counter sheave is set on the middle part of wheel shaft by rolling bearing, recess is opened in the circumferential surface of wheel shaft, and clamping plate is fixed in recess by the cooperation of bolt and nut on bearing plate, to realize the positioning of wheel shaft. Steel wire rope is wound in the rope groove of counter sheave, for driving the lifting of elevator car. When rolling bearing is in normal work, the rolling friction of counter sheave is very small, which facilitates the traction movement of steel wire rope in the rope groove of counter sheave, but when rolling bearing is broken and stuck, counter sheave will also be stuck, which will inevitably lead to the serious damage of steel wire rope in the rope groove of counter sheave during the operation of elevator, and even the breakage of clamping plate bolt due to the sudden application of torque, which will cause the repeated wear of wheel shaft in installation hole, and finally lead to the broken axle of counter sheave and the falling of car.

[0003] In order to detect whether counter sheave is jammed, document CN201820574752.2 discloses a technical solution, which sets two protrusions on the outer edge surface of the two sides of counterweight wheel, sets locking snap ring on the rotating shaft of the two sides of counterweight wheel, sets photoelectric sensor and buzzer alarm on each group of locking snap ring, and uses photoelectric sensor to directly face the protrusion, so that the photoelectric sensor can detect whether the protrusion passes through the photoelectric sensor in real time during the rotation of counterweight wheel, which can detect whether the counterweight wheel and the rotating shaft exist relative rotation, and can detect whether the bearing in counterweight wheel is stuck in real time. However, the following problems exist: 1) photoelectric sensor and buzzer alarm are used, and the control system is connected, which needs to arrange cable on the side of counterweight, which is relatively complex. 2) the alarm way is only buzzer alarm, and the monitoring data is only fed back to the control system, which needs to be checked by detection personnel, and the timeliness is not good.

[0004] Document CN201120481117.8 discloses another technical solution, which positions wheel shaft by elastic element, but does not stick wheel shaft, when rolling bearing is broken and invalid, and then bearing is jammed or stuck, if elevator is running at this time, the safety switch is hit by the switch plate fixed on wheel shaft under the traction force of steel wire rope, to send stop running signal, to force elevator to stop running, to avoid the serious wear of steel wire rope or wheel shaft, and even the broken axle of sheave. However, the following problems exist: 1) safety switch is used, and cable needs to be arranged on the side of counterweight, which is relatively complex. SUMMARY

[0005] The technical problem solved by the present application is to provide an elevator counterweight device capable of accurately detecting counterweight blocking of a counter-rope wheel and without the need for additional cable arrangement.

[0006] To solve the above technical problem, the present application provides an elevator counterweight device having a counterweight frame, a counterweight safety gear and a counterweight wheel rotatably fixed to a bearing plate of the counterweight frame via a bearing and an axle, and further having a bearing blocking protection device.

[0007] The bearing blocking protection device has an axle stop plate, a spring mounting arm, a steel wire rope, a spring upper stop plate, a speed governor steel wire rope stop plate, a spring and a spring lower stop plate.

[0008] The axle stop plate plays a positioning role on the axle, when the counterweight wheel rotates and the bearing is normal, the axle and the axle stop plate do not rotate with the counterweight wheel, and when the bearing is blocked, the axle and the axle stop plate rotate with the counterweight wheel.

[0009] The spring mounting arm is fixed to the counterweight frame on the side close to the speed governor steel wire rope, and a plurality of holes are formed in the spring mounting arm, and the spring upper stop plate, the speed governor steel wire rope stop plate, the spring and the spring lower stop plate are arranged from top to bottom, and the speed governor steel wire rope stop plate is fixed to the speed governor steel wire rope.

[0010] The axle is connected to the spring upper stop plate via the steel wire rope, when the axle and the axle stop plate rotate with the counterweight wheel, the steel wire rope is horizontally displaced to pull the spring upper stop plate out of the spring mounting arm, and the spring acts upward to pull the counterweight safety gear.

[0011] Preferably, the distance between the spring upper stop plate and the spring lower stop plate is adjustable to adjust the pulling force generated when the spring is released.

[0012] Preferably, the bearing blocking protection device further has a left spring, a right spring and a fixing member, the fixing member is fixedly connected to the bearing plate, and the left spring and the right spring are arranged between the axle stop plate and the fixing member.

[0013] Preferably, the bearing blocking protection device further has a plurality of guide wheels for guiding the steel wire rope.

[0014] Preferably, the elevator counterweight device further has a counterweight safety gear action detection system, which includes a safety control unit, a current acquisition unit and a calculation unit, when the elevator starts to operate, the current acquisition unit detects the motor current and calculates the value via the calculation unit, when the calculated value is greater than a threshold value, the safety control unit determines that the counterweight safety gear is braked and enters a fault state, and outputs an execution protection measure instruction.

[0015] Compared with the prior art, the present application has the following technical effects:

[0016] 1) By using the counterweight safety clamp to transmit the bearing jamming information to the elevator system, there is no need to install sensors and cables on the counterweight side.

[0017] 2) After the bearing jams, the counterweight wheel bearing jamming detection mechanism will immediately trigger the counterweight side safety clamp brake when the counterweight is descending. The counterweight safety clamp action detection system detects the change in traction machine parameters and immediately stops the elevator. Attached Figure Description

[0018] The accompanying drawings are intended to illustrate the general characteristics of the methods, structures, and / or materials used in specific exemplary embodiments of the invention, supplementing the description in the specification. However, the drawings are schematic diagrams not drawn to scale and may not accurately reflect the precise structural or performance characteristics of any of the given embodiments. The drawings should not be construed as limiting or restricting the range of numerical values ​​or properties covered by exemplary embodiments of the invention. The invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:

[0019] Figure 1 This is a schematic diagram of the elevator counterweight device in Example 1. Detailed Implementation

[0020] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can fully understand other advantages and technical effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through different specific embodiments, and the details in this specification can also be applied based on different viewpoints, with various modifications or changes made without departing from the overall design concept of the invention. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other. The following exemplary embodiments of the present invention can be implemented in many different forms and should not be construed as being limited to the specific embodiments set forth herein. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the technical solutions of these exemplary embodiments to those skilled in the art.

[0021] Example 1

[0022] like Figure 1 As shown, this embodiment provides an elevator counterweight device, which has a counterweight frame, a counterweight safety clamp and a counterweight wheel 6. The counterweight wheel 6 is rotatably fixed on the bearing plate 2 of the counterweight frame through a bearing 7 and a wheel axle 1. The elevator counterweight device also has a bearing jamming protection device.

[0023] The bearing jamming protection device includes a wheel axle baffle 5, a spring mounting arm 11, a steel wire rope 8, an upper spring baffle 12, a speed limiter steel wire rope baffle 13, a spring 14, and a lower spring baffle 15.

[0024] The wheel axle baffle 5 plays a positioning role on the wheel axle 1. When the counterweight wheel rotates and the bearing is normal, the wheel axle and the wheel axle baffle do not rotate with the counterweight wheel. When the bearing is blocked, the wheel axle and the wheel axle baffle rotate with the counterweight wheel.

[0025] The spring mounting arm 11 is fixed on the counterweight frame on one side of the speed limiter steel wire rope 10. A plurality of holes are formed in the spring mounting arm 11. From top to bottom, the spring upper baffle 12, the speed limiter steel wire rope baffle 13, the spring 14, and the spring lower baffle 15 are arranged. The speed limiter steel wire rope baffle 13 is fixedly connected with the speed limiter steel wire rope 10.

[0026] The wheel axle 1 is connected with the spring upper baffle 12 through the steel wire rope 8. When the wheel axle 1 and the wheel axle baffle 5 rotate with the counterweight wheel 6, the steel wire rope 8 is horizontally displaced, the spring upper baffle 12 is pulled out of the spring mounting arm 11, the spring 14 acts upward, and the counterweight safety clamp is lifted. When the counterweight descends, braking is generated.

[0027] The distance between the spring upper baffle 12 and the spring lower baffle 15 can be adjusted to adjust the lifting force generated when the spring is released.

[0028] The bearing blocking protection device further has a left spring, a right spring, and a fixing member 3. The fixing member 3 is fixedly connected with the bearing plate 2. The left spring and the right spring are arranged between the wheel axle baffle 5 and the fixing member 3. The bearing blocking protection device further has a plurality of guide wheels 9 for guiding the steel wire rope.

[0029] Embodiment 2

[0030] On the basis of Embodiment 1, the counterweight device of the elevator further has a counterweight safety clamp action detection system. The counterweight safety clamp action detection system includes a safety control unit, a current acquisition unit, and a calculation unit.

[0031] When the elevator starts to operate, the current acquisition unit detects the motor current, and the calculation unit calculates. When the calculation value is greater than a threshold value, the safety control unit determines that the counterweight safety clamp brakes, enters a fault state, and outputs an execution protection measure instruction.

[0032] The above describes the present application in detail through specific embodiments and examples, but these do not constitute a limitation on the present application. Those skilled in the art can also make many modifications and improvements without departing from the principles of the present application, and these should also be considered as the protection scope of the present application.

Claims

1. An elevator counterweight device having a counterweight frame, a counterweight safety gear, and a counterweight wheel rotatably fixed to a load plate of the counterweight frame by a bearing and an axle, characterized by, The elevator counterweight device also has a bearing blocking protection device; The bearing blocking protection device has an axle block, a spring mounting arm, a steel wire rope, a spring upper block, a speed limiter steel wire rope block, a spring and a spring lower block; The axle block plays a positioning role on the axle, when the counterweight wheel rotates, the axle and the axle block do not rotate with the counterweight wheel when the bearing is normal, and the axle and the axle block rotate with the counterweight wheel when the bearing is blocked; The spring mounting arm is fixed on the counterweight frame near the speed limiter steel wire rope, a plurality of holes are arranged on the spring mounting arm, and the spring upper block, the speed limiter steel wire rope block, the spring and the spring lower block are arranged from top to bottom, and the speed limiter steel wire rope block is fixedly connected with the speed limiter steel wire rope; The axle is connected with the spring upper block through the steel wire rope, when the axle and the axle block rotate with the counterweight wheel, the steel wire rope generates horizontal displacement, the spring upper block is pulled out of the spring mounting arm, the spring acts upward, and the counterweight safety hook is lifted.

2. The elevator counterweight arrangement according to claim 1, characterized in that The distance between the spring upper block and the spring lower block can be adjusted to adjust the lifting force generated when the spring is released.

3. The elevator counterweight arrangement according to claim 1, characterized in that The bearing blocking protection device also has a left spring, a right spring and a fixing member; the fixing member is fixedly connected with the bearing plate, and the left spring and the right spring are arranged between the axle block and the fixing member.

4. The elevator counterweight arrangement according to claim 1, characterized in that The bearing blocking protection device also has a plurality of guide wheels for guiding the steel wire rope.

5. The elevator counterweight arrangement according to claim 1, characterized in that The elevator counterweight device also has a counterweight safety hook action detection system, and the counterweight safety hook action detection system comprises a safety control unit, a current acquisition unit and a calculation unit; When the elevator starts to run, the current acquisition unit detects the motor current, and the calculation unit calculates, when the calculation value is greater than a threshold value, the safety control unit determines that the counterweight safety hook is braked, enters a fault state, and outputs an execution protection measure instruction.

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