Counterweight device of elevator

Abstract

The invention discloses a counterweight device of an elevator in the technical field of elevators. The counterweight device comprises a counterweight frame and a plurality of counterweight blocks, a plurality of limiting rods are arranged at the inner bottom of the counterweight frame, first limiting pipes are arranged on the two opposite sides of each limiting rod, and internal threads are arranged in the first limiting pipes; each balancing weight comprises a balancing weight body and a plurality of screws, and a vertical through hole is formed in the center of the balancing weight body; two second limiting pipes are fixed to the balancing weight, and internal threads are arranged in the second limiting pipes. Each balancing weight is provided with two mounting holes, the two mounting holes are located under the two second limiting pipes respectively and communicated with the second limiting pipes, each mounting hole comprises an upper half section and a lower half section, the upper half section of each mounting hole is provided with an internal thread, and the hole diameter of each mounting hole is the same as the inner diameter of the corresponding second limiting pipe; the aperture of the lower half section of the mounting hole is the same as the outer diameter of the second limiting pipe. According to the scheme, the problems that an existing elevator balancing weight is large in mass and large in size, and safety accidents may occur during installation are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and particularly relates to a counterweight device for an elevator. Background Art

[0002] The elevator counterweight device is an important part of the elevator system, and it is mainly composed of a counterweight frame and counterweight blocks. The counterweight frame is usually a metal structure frame for carrying the counterweight blocks. The counterweight blocks are generally made of cast iron or other high-density materials, and their mass is configured according to factors such as the rated load of the elevator and the self-weight of the car. Usually, the overall mass of the counterweight device is between 1900 kg and 2000 kg, and each single counterweight block is mostly in the shape of a cuboid or a cube. Therefore, a lifting device is required for assistance during installation. During installation, the counterweight blocks are hoisted one by one onto the counterweight frame, aligned with the installation position of the counterweight frame and slowly lowered, so that the counterweight blocks are accurately placed on the corresponding slots or brackets. However, for the current elevator counterweight device, the counterweight blocks are large in mass and volume, with a length of 30 - 120 cm and a width of 20 - 40 cm. Therefore, when the lifting rope of the lifting device is too long and sways during the installation process, its inertia is relatively large, and it is difficult for workers to control the sway of the counterweight blocks. If the counterweight blocks hit the hoistway or the installers, damage or safety accidents are likely to occur. Therefore, in order to reduce the risks during the installation process, a new elevator counterweight device is urgently needed. Summary of the Invention

[0003] The present invention aims to provide a counterweight device for an elevator to solve the problem that safety accidents may occur during the installation of the current elevator counterweight blocks due to their large mass and volume.

[0004] To solve the above technical problems, the present invention provides the following technical solution: A counterweight device for an elevator, comprising a counterweight frame and multiple counterweight blocks; a plurality of vertical limiting rods are spaced on the inner bottom of the counterweight frame, and on opposite sides of each limiting rod, there are first limiting tubes fixedly connected to the inner bottom of the counterweight frame, and internal threads are provided inside the first limiting tubes;

[0005] Each of the counterweight blocks includes a counterweight block body and multiple screw rods. A vertical through hole is provided at the center of the counterweight block body for cooperation with the limiting rod; two second limiting tubes identical to the first limiting tubes are fixedly connected to the upper surface of the counterweight block, and the second limiting tubes are located on opposite sides of the through hole, and internal threads are provided inside the second limiting tubes; two mounting holes are provided on each counterweight block, and the two mounting holes are respectively located directly below the two second limiting tubes and communicate with the second limiting tubes. Each mounting hole includes an upper half section and a lower half section. The upper half section of the mounting hole is provided with internal threads, and the hole diameter is the same as the inner diameter of the second limiting tube. The hole diameter of the lower half section of the mounting hole is the same as the outer diameter of the second limiting tube, and the depth of the lower half section of the mounting hole is the same as the length of the second limiting tube;

[0006] After the second limiting tubes on different counterweight blocks are inserted into the lower half of the mounting holes, the screw is screwed in to fix the second limiting tubes in the mounting holes.

[0007] Working principle of the present invention: Calculate the number of counterweight blocks in advance according to the car and load mass. During installation, align the through holes of the counterweight blocks with the limiting rods and sleeved on the limiting rods, then move the counterweight blocks to the bottom of the limiting rods, insert the two first limiting tubes beside the limiting rods into the two mounting holes of the counterweight blocks, then insert the screw into the second limiting tube of the counterweight block and rotate it, so that the screw moves down in the second limiting tube until the bottom end of the screw moves to the bottom end of the first limiting tube, and the top end of the screw is in the upper half of the mounting hole. At this time, the screw installation is completed. Repeat the above operations until a counterweight block is installed on each limiting rod. Then, take the counterweight block and sleeved on the limiting rod and move it downward, insert the two second limiting tubes of the first layer of counterweight blocks into the two mounting holes of the counterweight block, then take the bolt and insert it into the second limiting tube of the second layer of counterweight blocks and rotate it, so that the bottom end of the bolt moves into the second limiting tube of the first layer of counterweight blocks for threaded connection. Repeat this way until all the counterweight blocks are installed.

[0008] Beneficial effects of the present invention:

[0009] 1. In this solution, the elevator counterweight blocks are split into small-sized counterweight blocks. In this way, even without using lifting equipment during the installation process, workers can manually lift the counterweight blocks to install the elevator counterweight device, avoiding safety accidents where large-mass counterweight blocks hit the hoistway or workers when the lifting rope of the lifting device is too long and shakes.

[0010] 2. In this solution, the counterweight blocks are sleeved on the limiting rods through the through holes, which can prevent the counterweight blocks from moving horizontally. At the same time, by inserting two first limiting tubes or two second limiting tubes into the mounting holes of the counterweight blocks, the rotation of the counterweight blocks around the limiting rods is avoided, ensuring the stability of the counterweight blocks. At the same time, the screw is used to fix multiple counterweight blocks and the counterweight frame, making them fastened into a whole, which also ensures the stability of the counterweight blocks during vertical movement and will not cause vertical movement. This stable way of multi-structure cooperation ensures that the counterweight device will not cause the position deviation of the counterweight blocks due to shaking or vibration during the operation of the elevator, thus ensuring the smoothness and safety of the elevator operation, extending the service life of the elevator, and reducing the later maintenance cost.

[0011] 3. The cooperation between the limiting rod and the through hole enables the counterweight block to be quickly positioned during installation without the need for repeated position adjustment. In addition, the upper half of the installation hole is provided with internal threads and the hole diameter is the same as the inner diameter of the second limiting tube, while the lower half of the hole diameter is the same as the outer diameter of the second limiting tube and the depth is the same as the length of the second limiting tube. Such a design makes the connection between different counterweight blocks very simple. During the installation process, only need to insert the second limiting tube into the lower half of the installation hole and then screw in the screw to complete the connection. Compared with the traditional method of hoisting the counterweight block onto the counterweight frame and aligning it with the card slot or bracket and slowly lowering it, this method not only simplifies the operation steps but also reduces the dependence on lifting equipment, significantly improving the installation efficiency.

[0012] 4. By adopting this solution, the number of counterweight blocks on each floor can be adjusted according to the situation of the elevator shaft, thereby reducing the width of the counterweight device.

[0013] Furthermore, the number of the limiting rods is three. One limiting rod is fixed at the middle position of the counterweight frame, and the other two limiting rods are symmetrically fixed on both sides of the limiting rod at the middle position. And the distance between the limiting rods on both sides and the limiting rod at the middle position is twice the distance between the limiting rods on both sides and the counterweight frame. The purpose is that through this kind of setting, it can be ensured that three counterweight blocks can be evenly placed on each layer of the counterweight frame, and the installed counterweight blocks are symmetrical and have uniform mass.

[0014] Furthermore, a flat countersunk groove is provided at the top end of the screw. The purpose is that through this kind of setting, it is convenient to use an electric drill and a flat screwdriver to install the screw.

[0015] Furthermore, the counterweight block is made of cast iron.

[0016] Furthermore, the length of the counterweight block is 15 cm, the width is 12 cm, and the height is 5 cm. The purpose is that the mass of the counterweight block under this kind of volume is about 6.5 kg, which enables workers to easily pick it up for assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a counterweight device of an elevator according to the present invention;

[0018] Figure 2 is Figure 1 a schematic structural diagram of the counterweight block in

[0019] Figure 3 is Figure 2 a cross-sectional view of the front view. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following is further detailed through specific embodiments:

[0021] The reference numerals in the drawings of the specification include: counterweight frame 1, second limiting tube 2, screw 3, counterweight 4, limiting rod 5, first limiting tube 6, through hole 7, upper half section 8, lower half section 9.

[0022] The embodiment is basically as shown in the appended Figure 1 , the appended Figure 2 and the appended Figure 3 as follows:

[0023] A counterweight device for an elevator, comprising a counterweight frame 1 and multiple counterweights 4 made of cast iron. The length of the counterweight 4 is 15 cm, the width is 12 cm, and the height is 5 cm. Three vertical limiting rods 5 are spaced on the inner bottom of the counterweight frame 1. One of the limiting rods 5 is fixed in the middle position of the counterweight frame 1, and the other two limiting rods 5 are symmetrically fixed on both sides of the limiting rod 5 in the middle position. The distance between the limiting rods 5 on both sides and the limiting rod 5 in the middle position is twice the distance between the limiting rods 5 on both sides and the counterweight frame 1. First limiting tubes 6 are provided on both opposite sides of each limiting rod 5. The first limiting tubes 6 are fixedly connected to the inner bottom of the counterweight frame 1, and internal threads are provided inside the first limiting tubes 6.

[0024] Each counterweight 4 includes a counterweight 4 body and multiple screws 3. A flat countersunk groove is provided at the top end of the screw 3. A vertical through hole 7 is provided at the center of the counterweight 4 body, and the through hole 7 is used for cooperation with the limiting rod 5. Two second limiting tubes 2 identical to the first limiting tubes 6 are fixedly connected to the upper surface of the counterweight 4. The second limiting tubes 2 are located on both sides opposite to the through hole 7, and internal threads are provided in the second limiting tubes 2. Two mounting holes are provided on each counterweight 4. The two mounting holes are respectively located directly below the two second limiting tubes 2 and communicate with the second limiting tubes 2. The mounting holes include an upper half section 8 and a lower half section 9. Internal threads are provided in the upper half section 8 of the mounting hole, and the hole diameter is the same as the inner diameter of the second limiting tube 2. The hole diameter of the lower half section 9 of the mounting hole is the same as the outer diameter of the second limiting tube 2, and the depth of the lower half section 9 of the mounting hole is the same as the length of the second limiting tube 2.

[0025] The screw 3 is used to fix the second limiting tube 2 in the mounting hole by screwing the screw 3 after the second limiting tube 2 on different counterweights 4 is inserted into the lower half section 9 of the mounting hole.

[0026] The specific implementation process is as follows:

[0027] Calculate the number of counterweights 4 in advance according to the car and the load mass. During installation, align the through holes 7 of the counterweights 4 with the limit rods 5 and slip them onto the limit rods 5. Then move the counterweights 4 to the bottom of the limit rods 5, insert the two first limit tubes 6 beside the limit rods 5 into the two installation holes of the counterweights 4. Then insert the screw 3 into the second limit tube 2 of the counterweight 4 and rotate it, so that the screw 3 moves downward in the second limit tube 2 until the bottom end of the screw 3 moves to the bottom end of the first limit tube 6, and the top end of the screw 3 is in the upper half 8 of the installation hole. At this time, the installation of the screw 3 is completed. Repeat the above operations until a counterweight 4 is installed on each limit rod 5. Then take a counterweight 4, slip it onto the limit rod 5 and move it downward, insert the two second limit tubes 2 of the first layer of counterweights 4 into the lower half 9 of the two installation holes of this counterweight 4. Then take a bolt, insert it into the second limit tube 2 of the second layer of counterweights 4 and rotate it, so that the bottom end of the bolt moves into the second limit tube 2 of the first layer of counterweights 4 for threaded connection. Repeat this way until all the counterweights 4 are installed.

Claims

1. A counterweight device for an elevator, characterized in that: It comprises a counterweight frame and a plurality of counterweight blocks; a plurality of vertical limit rods are arranged at intervals on the inner bottom of the counterweight frame, and a first limit tube is arranged on opposite sides of each limit rod, the first limit tube is fixedly connected to the inner bottom of the counterweight frame, and an internal thread is arranged in the first limit tube; Each of the balancing weight blocks comprises a balancing weight block body and a plurality of screw rods, a vertical through hole is provided at the center of the balancing weight block body, and the through hole is used in conjunction with a limiting rod; two second limiting tubes identical to the first limiting tubes are fixedly connected to the upper surface of the balancing weight block, the second limiting tubes are located on opposite sides of the through hole, and the second limiting tubes are provided with internal threads; two mounting holes are provided on the balancing weight block, the two mounting holes are respectively located directly below the two second limiting tubes and are connected to the second limiting tubes, the mounting hole comprises an upper half and a lower half, the upper half of the mounting hole is provided with an internal thread, and the aperture is the same as the inner diameter of the second limiting tube, the aperture of the lower half of the mounting hole is the same as the outer diameter of the second limiting tube, and the depth of the lower half of the mounting hole is the same as the length of the second limiting tube; The screw rod is used for fixing the second position limiting tube on different counterweight blocks in the mounting hole after the second position limiting tube is inserted into the lower half of the mounting hole.

2. The counterweight device of an elevator according to claim 1, characterized in that: There are three limit rods, one of which is fixed at the middle position of the counterweight frame, and the other two limit rods are symmetrically fixed on both sides of the limit rod in the middle position, and the distance between the limit rods on both sides and the limit rod in the middle is twice the distance between the limit rods on both sides and the counterweight frame.

3. The counterweight device of an elevator according to claim 2, characterized in that: The top end of the screw rod is provided with a straight groove.

4. The counterweight device of an elevator according to claim 3, characterized in that: The counterweight block is a counterweight block made of cast iron.

5. The counterweight device of an elevator according to claim 4, characterized in that: The counterweight block has a length of 15 cm, a width of 12 cm and a height of 5 cm.

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