Counterweight assembly for modernizing an old elevator

Abstract

The utility model discloses a kind of counterweight assemblies for old elevator reconstruction, it is related to special equipment field, including counterweight frame and its inside horizontal built-in counterweight block, counterweight frame both sides fixed guide shoe and by girder connection, side mounting angle steel is set to opposite side of girder, and reinforcing angle steel is installed in adhesion on side mounting angle steel.The screw rod of counterweight frame four corners is used to form the pressure hold connection with the angle steel and side mounting angle steel that are additionally hung, installation column is equipped on side mounting angle steel and is penetrated through girder after being locked by nut, so that the counterweight block that is additionally hung can be installed in lateral space in perpendicular mode stably.Reinforcing angle steel can select L type steel or I type steel according to trajectory space, improve bearing capacity and avoid operation interference.The present application significantly improves the range of configurable counterweight under the premise of retaining original counterweight structure by lateral supplement mode, does not change counterweight movement trajectory, realizes the counterweight expansion of low cost, low change, structure is stable and reliable, applicable to the weight modification needs of old elevator.

Description

Technical Field

[0001] This utility model relates to the field of special equipment, and in particular to a counterweight component for the renovation of old elevators. Background Technology

[0002] When retrofitting existing old elevators, especially after bridge car reinforcement or modification, the weight of the elevator car often exceeds the original counterweight design's load-bearing capacity, leading to an imbalance in the weight ratio between the original counterweight and the bridge car. In cases of significant modifications, it is usually necessary to replace the traction chain or counterweight assembly to ensure the safety and stability of elevator operation. However, currently available counterweight assemblies typically cannot be increased beyond their maximum weight limit. Furthermore, in actual retrofitting, replacing the counterweight is not only costly but also complex, impacting the efficiency and economy of retrofitting old elevators. In addition, because the original counterweight assembly structure is fixed, counterweight addition often requires redesigning or modifying the elevator guide rails and movement trajectory, increasing construction difficulty and safety hazards, and limiting the flexibility and applicability of retrofitting old elevators. Utility Model Content

[0003] The purpose of this utility model is to solve the problem that the counterweight is difficult to coordinate with the continued increase in the weight of the elevator car during the traditional elevator renovation process, and to propose a counterweight component for the renovation of old elevators.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a counterweight component for the renovation of old elevators, comprising a counterweight frame and a plurality of built-in counterweight blocks therein, guide shoes are fixed on both sides of the counterweight frame, and two main beams are fixed at both ends of the guide shoes; Side-mounted angle steels are fixed to the opposite sides of the two main beams on the same side, and two reinforcing angle steels are attached and pressed onto the two side-mounted angle steels on the same side. Each of the four corners of the counterweight frame is pierced by a screw rod, and one end of the screw rod is pierced and connected to one end of the side-mounted angle steel. Several external counterweights are installed between the two side-mounted angle steels on the same side.

[0005] As a further description of the above technical solution: a mounting column is fixed on the side-mounted angle steel, and the mounting column passes through one side of the main beam and is then fastened by a nut.

[0006] As a further description of the above technical solution: the two ends of the screw are fixed and pressed against the side-mounted angle steel by the cooperation of the nuts with the end of the angle steel being attached.

[0007] As a further description of the above technical solution: the built-in counterweight is horizontally arranged, and the external counterweight is vertically arranged.

[0008] As a further description of the above technical solution: the position of the reinforcing angle steel on the side-mounted angle steel is set synchronously with the position of the external counterweight.

[0009] As a further description of the above technical solution: the reinforcing angle steel exceeds the thickness of the main beam, and the reinforcing angle steel includes L-shaped steel or I-shaped steel.

[0010] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: This solution involves installing or welding side-mounted angle steel through opening holes in the existing counterweight frame, and filling the gap between the angle steel and the original counterweight frame with external counterweight blocks to effectively supplement the counterweight without replacing the original counterweight or traction chain, thus maintaining the integrity of the original built-in counterweight blocks. Meanwhile, the reinforced angle steel fixed by screws ensures the stable installation of the external counterweight within the movement trajectory. When there is potential interference in the trajectory, the problem can be solved by adjusting the profile of the reinforced angle steel (replacing L-shaped steel with I-shaped steel). This significantly reduces the renovation cost and construction complexity, improves the flexibility and safety of old elevator renovation, and allows for direct use without altering the original lifting trajectory. It achieves simultaneous consideration of counterweight addition and bridge reinforcement, improving renovation efficiency and economy. Attached Figure Description

[0011] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a side view of the cross-sectional diagram of the present invention; Figure 3 This is an exploded view of the present invention; Figure 4 This is a schematic diagram of the conventional counterweight frame of this utility model.

[0012] Legend: 1. Counterweight frame; 2. Guide shoe; 3. Main beam; 4. Side-mounted angle steel; 5. External counterweight block; 6. Reinforcing angle steel; 7. Screw; 8. Mounting column; 9. Internal counterweight block. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] like Figure 1 - Figure 4As shown, the present invention provides a counterweight assembly for retrofitting old elevators, comprising a counterweight frame 1 and a plurality of built-in counterweight blocks 9 disposed therein, wherein guide shoes 2 are fixed on both sides of the counterweight frame 1, and two main beams 3 are fixed at both ends of the guide shoes 2. Two side-mounted angle steels 4 are fixed on opposite sides of the two main beams 3 on the same side, and two reinforcing angle steels 6 are attached and pressed on the two side-mounted angle steels 4 on the same side. Each of the four corners of the counterweight frame 1 is pierced by a screw rod 7, and one end of the screw rod 7 is pierced and connected to one end of the side-mounted angle steel 4. Several external counterweights 5 are installed between the two side-mounted angle steels 4 on the same side.

[0015] This method significantly increases counterweight capacity through lateral additions without replacing the original counterweight components, thus solving the problem of insufficient counterweight in older elevators after car reinforcement or modification. By adding side-mounted angle steel 4 to the outside of the counterweight frame 1, and utilizing through bolts 7, mounting columns 8, and reinforcing angle steel 6 to form a stable clamping structure, the external counterweight 5 can be safely arranged within the vertical trajectory range corresponding to the main beam 3. This eliminates the need to dismantle or modify the original guide rail arrangement, movement trajectory, or counterweight frame, reducing construction risks and ensuring continuous lifting operation. The vertical arrangement of the external counterweight 5 maximizes the use of lateral space and forms a bidirectional force-bearing system with the retained horizontal internal counterweight 9, significantly increasing the adjustable counterweight range while maintaining structural stability. The reinforcing angle steel 6 can be selected in L-shape or I-shape depending on the trajectory space, ensuring it avoids interference and provides sufficient load-bearing rigidity in different installation environments, further enhancing the adaptability of counterweight additions. This solution achieves scalability of counterweight capacity with the lowest cost structure, and significantly improves construction simplicity, counterweight stability, retrofit compatibility and safety. It provides an efficient, reliable technical approach for retrofitting old elevators without affecting the original operating conditions.

[0016] Specifically, such as Figure 2 As shown, a mounting column 8 is fixed on the side-mounted angle steel 4, and the mounting column 8 passes through one side of the main beam 3 and is then fastened with a nut.

[0017] A mounting column 8 is fixedly installed on the side-mounted angle steel 4. The mounting column 8 penetrates one side of the main beam 3 along its axial direction and is then fastened and locked to the outside of the main beam 3 with nuts, so that the side-mounted angle steel 4 can be stably positioned on the side of the main beam 3 with the mounting column 8 as the connecting medium. After fastening, this structure can form a reliable surface support, so that the side-mounted angle steel 4 maintains a stable stress state when bearing the external counterweight 5. The through connection of the mounting column 8 enhances the overall bonding strength between the side-mounted angle steel 4 and the main beam 3, thereby effectively improving the structural rigidity and safety of the counterweight component during operation and providing a stable installation foundation for the arrangement of the external counterweight 5.

[0018] Specifically, such as Figure 1 As shown, the two ends of the screw 7 are fixed to the end with the angle steel attached by the nuts and press the side-mounted angle steel 4.

[0019] After the screw 7 passes through the four corners of the counterweight frame 1, its two ends are respectively engaged with the end of the angle steel to be hung by nuts. Under the axial locking force of the screw 7, the angle steel is stably pressed and held, thus reliably fixing the side-mounted angle steel 4 to the outer structure of the original counterweight frame 1. Through this end-pressing method of screw 7 and nuts, the side-mounted angle steel 4 can obtain a continuous and uniform clamping force after the external counterweight block 5 is installed, avoiding loosening caused by vibration or force changes during elevator lifting and lowering, improving the overall load-bearing stability of the external counterweight block 5, and ensuring the connection rigidity between the side-mounted angle steel 4 and the counterweight frame 1, providing reliable support for the vertical arrangement of the external counterweight block 5.

[0020] Specifically, such as Figure 3 As shown, the built-in counterweight 9 is horizontally positioned, while the external counterweight 5 is vertically positioned.

[0021] The built-in counterweight 9 is placed horizontally inside the counterweight frame 1, forming a basic counterweight structure through its uniform distribution of center of gravity. The external counterweight 5 is arranged vertically along the side-mounted angle steel 4, allowing for maximum counterweight addition even with limited lateral space. This combination of horizontal and vertical counterweights makes efficient use of the internal and lateral spaces of the original counterweight frame 1. It not only ensures the original stable structure of the built-in counterweight 9 but also provides the external counterweight 5 with higher stress stability in its vertical arrangement. This expands the counterweight capacity without altering the overall movement trajectory of the counterweight components, offering greater flexibility and reliability for the retrofitting of older elevators.

[0022] Specifically, such as Figure 2 As shown, the reinforcing angle steel 6 is positioned on the side-mounted angle steel 4 and the position of the external counterweight 5 is synchronously set.

[0023] The reinforcing angle steel 6 is installed on the side-mounted angle steel 4, and its position corresponds to the arrangement area of ​​the external counterweight 5 on the side-mounted angle steel 4. This ensures that the reinforcing angle steel 6 can provide effective support and clamping within the same stress range as the external counterweight 5. This synchronous installation allows the external counterweight 5 to directly rely on the reinforcing angle steel 6 for stable lateral restraint after installation, preventing swaying or displacement of the counterweight during elevator movement. It also ensures that the additional load generated by the external counterweight 5 is evenly transmitted along the stress path of the side-mounted angle steel 4 and the counterweight frame 1, further enhancing the rigidity, reliability, and deformation resistance of the entire counterweight assembly during operation, providing stable structural support for the weight-bearing retrofit of older elevators.

[0024] Specifically, such as Figure 1 As shown, the reinforcing angle steel 6 extends beyond the thickness of the main beam 3, and the reinforcing angle steel 6 includes L-shaped steel or I-shaped steel.

[0025] The reinforcing angle steel 6 is set on the side-mounted angle steel 4. After the external counterweight 5 is installed, it improves the overall structural stability and load-bearing capacity of the modified counterweight component. The reinforcing angle steel 6 can be L-shaped steel or I-shaped steel. The L-shaped steel fixes the side-mounted angle steel 4 under the pressure of the screw 7 through its angular support and disperses the pressure generated by the external counterweight 5. The I-shaped steel provides an optional method in the case of possible interference of movement trajectory, meeting the needs of use with a slight sacrifice of strength.

[0026] In the traditional renovation of old elevators, it is often necessary to reinforce the elevator car, making its weight exceed the original weight ratio between the car and the counterweight. When the renovation is significant, it is often necessary to replace the traction chain and the counterweight. Currently, the counterweight can only be increased to its maximum weight, making the replacement of the counterweight components unnecessary during the renovation of old elevators. Based on this, this solution provides a low-cost solution by drilling holes in the original counterweight frame 1 and installing or directly welding side-mounted angle steel 4, and directly filling the gap between the angle steel and the original counterweight frame 1 with external counterweight blocks 5. This method can control the thickness of the external counterweight blocks 5 within the corresponding vertical trajectory range of the main beam 3. The original counterweight lifting trajectory does not need to be checked before it can be put into use. Furthermore, if there is interference in the movement trajectory of the reinforcing angle steel 6 fixed by the screw 7, the L-shaped steel of the reinforcing angle steel 6 can be replaced with I-shaped steel to meet the requirements. This method achieves stable installation and configuration of external counterweights 5 on both sides while retaining the original built-in counterweight 9, thus preserving the original counterweight and greatly reducing the cost of modification.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A counterweight assembly for retrofitting old elevators, comprising a counterweight frame (1) and a plurality of built-in counterweight blocks (9) disposed therein, characterized in that: The counterweight frame (1) is fixed with guide shoes (2) on both sides, and two main beams (3) are fixed at both ends of the guide shoes (2). Two side-mounted angle steels (4) are fixed on opposite sides of the two main beams (3) on the same side, and two reinforcing angle steels (6) are attached and pressed on the two side-mounted angle steels (4) on the same side. Each of the four corners of the counterweight frame (1) is connected by a screw (7), and one end of the screw (7) is connected to one end of the side-mounted angle steel (4). Several external counterweights (5) are installed between the two side-mounted angle steels (4) on the same side.

2. The counterweight component for retrofitting old elevators according to claim 1, characterized in that, The side-mounted angle steel (4) is fixed with an installation column (8), which is installed by fastening with a nut after passing through one side of the main beam (3).

3. The counterweight component for retrofitting old elevators according to claim 1, characterized in that, The two ends of the screw (7) are fixed to the end with the angle steel attached by the nuts and press the side-mounted angle steel (4).

4. The counterweight component for retrofitting old elevators according to claim 1, characterized in that, The built-in counterweight (9) is set horizontally, and the external counterweight (5) is set vertically.

5. A counterweight component for retrofitting old elevators according to claim 1, characterized in that, The reinforcing angle steel (6) is positioned on the side-mounted angle steel (4) and the position of the external counterweight (5) is set synchronously.

6. A counterweight component for retrofitting old elevators according to claim 1, characterized in that, The reinforcing angle steel (6) extends beyond the thickness of the main beam (3), and the reinforcing angle steel (6) includes L-shaped steel or I-shaped steel.

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