High-stability double-row chain transmission lifting device

Abstract

The utility model relates to a high-stability double-row chain transmission lifting device which comprises a pair of lifting guide rails, a material frame and a lifting machine, and the two lifting guide rails are vertically arranged on the two sides of the material frame and guide the material frame to do lifting motion. The motor is higher than the lifting guide rail, the duplex chain wheel is driven by the motor and rotates in the first horizontal direction, the two chains are matched with the duplex chain wheel, the balancing weight is connected with the same ends of the two chains, and the moving path of the balancing weight and the moving path of the material frame are staggered. The two chains are arranged side by side, and the other ends are connected to the middle of the rack. By adopting the two chains, the tension is halved compared with that of one chain, and the movement is more stable compared with that of the other chain, so that the abrasion can be reduced, and the service life of parts can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting devices, in particular to a high-stability double-row chain transmission lifting device. Background Art

[0002] After carburizing, workpieces need to be quenched to achieve final performance requirements. Since the quenching oil is contained in a sealed vacuum container, a mechanism is required to vertically immerse and remove the workpieces from the quenching oil within the vacuum environment. Traditionally, the workpiece rack was raised and lowered using a single row of chains. The chains engaged a sprocket at the top of the device, which was driven by a motor. One end of the chain was suspended from the top of the rack, and the other end was suspended from a counterweight. The counterweight was close to the weight of the rack, saving power during the rack lift.

[0003] Chinese patent CN118684001A discloses a bag stacking machine for ton bag packaging. Its lifting mechanism uses a conveyor chain to pull up a bridge, the other end of which is connected to a counterweight box. Because this bag stacking machine is relatively large, a conveyor chain is connected to each side of the bridge. Two sprockets on the upper part of the frame respectively cooperate with the two conveyor chains. The counterweight box is a wide plate structure and is relatively large in size. However, such a large device is not required in carburizing applications. However, if the size is only reduced, generally only one conveyor chain is used. However, if the workpiece is heavy, the material frame load is also relatively high. Not only is it more susceptible to wear during lifting and lowering, resulting in a shorter service life, but it also has poor stability, a high failure rate, and is prone to workpiece drops.

[0004] Therefore, it is necessary to improve the structure of the lifting device to solve the above problems. Summary of the Invention

[0005] The main purpose of the utility model is to provide a high-stability double-row chain transmission lifting device, which can improve the stability of material rack lifting and increase the service life of parts.

[0006] The utility model achieves the above-mentioned purpose through the following technical scheme: a highly stable double-row chain drive lifting device, comprising a pair of lifting guide rails, a material rack and an elevator, the two lifting guide rails are vertically arranged on both sides of the material rack and guide the lifting movement of the material rack, the elevator comprises a motor higher than the lifting guide rails, a double-row sprocket driven by the motor and rotating around a first horizontal direction, two chains matching the double-row sprockets and a counterweight block connecting the same end of the two chains, the moving path of the counterweight block is staggered with the moving path of the material rack, the two chains are positioned side by side and the other ends are connected to the middle of the material rack.

[0007] Specifically, each lifting guide rail has a guide groove facing the other lifting guide rail, and a pair of rollers are provided on each side of the material rack. The axes of all rollers are parallel to the first horizontal direction, and the rollers on the same side are in the guide groove.

[0008] Furthermore, a lower stopper is provided at the lower end of the guide groove for stopping the roller from descending to the lowest point.

[0009] Specifically, it also includes several guide cylinders, which are fixed on the outside of one of the lifting guide rails. All the guide cylinders are connected vertically and their centers are collinear. The counterweight block moves in the vertical area restricted by the guide cylinders.

[0010] Furthermore, the counterweight block is a bar structure.

[0011] Furthermore, it also includes a first guide wheel and a second guide wheel. The double-row sprocket, the first guide wheel, the second guide wheel and the guide cylinder are arranged in sequence from top to bottom. The inner side of the first guide wheel is located within the lower projection range of the double-row sprocket, and the outer side of the second guide wheel is flush with the center position of the guide cylinder.

[0012] The beneficial effects of the technical solution of this utility model are:

[0013] This utility model utilizes a fixed pulley system comprised of a double-row sprocket and two chains. A motor drives the double-row sprockets in both forward and reverse rotations, adjusting the height of the material rack. A counterweight naturally hangs down from one of the lifting guide rails, partially offsetting the load on the material rack. This reduces the motor's power input during the lifting process. For the same load, using two chains reduces the pulling force by half compared to a single chain, while also providing more stable movement. This reduces wear and extends component life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A three-dimensional diagram of a high-stability double-row chain drive lifting device according to an embodiment;

[0015] Figure 2 It is a cross-sectional view of a high-stability double-row chain transmission lifting device according to an embodiment.

[0016] The numbers in the figure represent:

[0017] 1-lifting guide rail, 11-guide groove, 12-lower stopper;

[0018] 2-material rack, 21-roller;

[0019] 3-lifter, 31-motor, 32-double-row sprocket, 33-chain, 34-counterweight;

[0020] 4- guide tube;

[0021] 5a-first guide wheel, 5b-second guide wheel. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to specific embodiments.

[0023] Example:

[0024] like Figure 1 and Figure 2 As shown, the high-stability double-row chain transmission lifting device of the present invention includes a pair of lifting guide rails 1, a material rack 2, an elevator 3, a plurality of guide cylinders 4, a first guide wheel 5a and a second guide wheel 5b.

[0025] like Figure 1 and Figure 2 As shown, two lifting guide rails 1 are vertically arranged on either side of a material rack 2 and guide the lifting and lowering movement of the material rack 2. Each lifting guide rail has a guide groove 11 facing the other lifting guide rail. A pair of rollers 21 are provided on each side of the material rack 2. The axes of all rollers 21 are parallel to the first horizontal direction. The rollers 21 on the same side are located within the guide groove 11. The lower end of the guide groove 11 is provided with a lower stopper 12 to prevent the rollers 21 from reaching their lowest point.

[0026] Lifting guide rail 1 limits the movement of rack 2. Rack 2 contacts the bottom of guide groove 11 via rollers 21. With two contact points on either side, rack 2's center of gravity remains in a vertical plane. As rack 2 is raised or lowered, rollers 21 roll, reducing friction and ensuring smoother movement and more stable direction.

[0027] like Figure 1 and Figure 2 As shown, the elevator 3 includes a motor 31 that is higher than the lifting guide rail 1, a double-row sprocket 32 ​​driven by the motor 31 and rotating around a first horizontal direction, two chains 33 that cooperate with the double-row sprocket 32, and a counterweight block 34 connecting the same end of the two chains 33. The moving path of the counterweight block 34 is staggered from the moving path of the material rack 2. The two chains 33 are positioned side by side and the other ends are connected to the middle of the material rack 2.

[0028] A double-row sprocket 32 ​​and two chains 33 form a fixed pulley system. A motor 31 drives the double-row sprocket 32 ​​in forward and reverse rotation, thereby changing the height of the material rack 2. A counterweight 34 naturally hangs down from one of the lifting guide rails 1, offsetting some of the load on the material rack 2. This reduces the power input to the motor 31 when the material rack 2 is lifted. For the same load, using two chains 33 reduces the tension by half compared to a single chain, while also providing more stable movement. This reduces wear and extends the service life of components.

[0029] like Figure 1 and Figure 2 As shown, the guide cylinder 4 is fixed to the outside of one of the lifting guide rails 1, and the double-row sprocket 32, the first guide wheel 5a, the second guide wheel 5b and the guide cylinder 4 are arranged in sequence from top to bottom. The inner side of the first guide wheel 5a is located within the lower projection range of the double-row sprocket 32, and the outer side of the second guide wheel 5b is flush with the center position of the guide cylinder 4. All guide cylinders 4 are connected from top to bottom and the center positions are collinear. The counterweight block 34 is a strip structure and moves within the vertical area restricted by the guide cylinder 4.

[0030] The guide tube 4 is designed to allow the counterweight 34 to move within a smaller vertical range, preventing the counterweight 34 from swinging significantly when the chain 33 is moving, which could cause instability in the material rack 2. The guide tube 4 is actually formed by multiple short, segmented tubes, and the counterweight 34 is relatively slender, which prevents any jamming between the two. The first guide wheel 5a and the second guide wheel 5b control the position of a section of the chain 33 that holds the counterweight 34, allowing the counterweight 34 to droop outward without being restricted by the size of the double-row sprocket 32. The double-row sprocket 32, the first guide wheel 5a, and the second guide wheel 5b form a three-fixed pulley system, which also reduces the instability of the chain 33 during movement.

[0031] The above descriptions are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A highly stable double-row chain drive lifting device, characterized by: It includes a pair of lifting guide rails, a material rack and an elevator. The two lifting guide rails are vertically arranged on both sides of the material rack and guide the lifting movement of the material rack. The elevator includes a motor higher than the lifting guide rails, a double-row sprocket driven by the motor and rotating around a first horizontal direction, two chains matching the double-row sprockets and a counterweight block connecting the same end of the two chains. The moving path of the counterweight block is staggered with the moving path of the material rack. The two chains are positioned side by side and the other ends are connected to the middle of the material rack.

2. The high-stability double-row chain transmission lifting device according to claim 1 is characterized in that: Each lifting guide rail has a guide groove facing the other lifting guide rail. A pair of rollers are provided on each side of the material rack. The axes of all rollers are parallel to the first horizontal direction, and the rollers on the same side are located in the guide groove.

3. The high-stability double-row chain transmission lifting device according to claim 2, characterized in that: A lower stopper is provided at the lower end of the guide groove for stopping the roller from reaching its lowest point.

4. The high-stability double-row chain transmission lifting device according to claim 1 is characterized in that: It also includes a plurality of guide cylinders, which are fixed on the outside of one of the lifting guide rails. All the guide cylinders are connected vertically and their centers are collinear. The counterweight moves in the vertical area restricted by the guide cylinders.

5. The high-stability double-row chain transmission lifting device according to claim 4 is characterized in that: The counterweight block is a bar structure.

6. The high-stability double-row chain transmission lifting device according to claim 4, characterized in that: It also includes a first guide wheel and a second guide wheel. The double-row sprocket, the first guide wheel, the second guide wheel and the guide cylinder are arranged in sequence from top to bottom. The inner side of the first guide wheel is located within the lower projection range of the double-row sprocket, and the outer side of the second guide wheel is flush with the center position of the guide cylinder.

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