Single chain hoist

Abstract

The utility model provides a single chain hoist, including the lifting frame, drive arrangement, the closed loop transmission mechanism of single chain composition, car and counterweight box, the chain of closed loop transmission mechanism is set up around in the lifting frame, and is connected with a plurality of sprocket meshes, one of a plurality of sprocket is the driving sprocket, and the rest sprocket is the driven sprocket, the output of drive arrangement is connected with the driving sprocket, is used for driving chain operation, car vertical sliding connection is in the lifting frame, and car and counterweight box are respectively with the both sides of chain fixed connection, and do the opposite direction lifting movement with the operation of chain, the utility model discloses the closed loop transmission mechanism of single chain composition, and the reasonable layout sprocket, car and counterweight box greatly simplify the overall structure of hoist, discard the unnecessary multiple chain complex design of heavy load hoist, make it satisfy the light load working condition demand, realize the balance of economy and practicality.

Description

Technical Field

[0001] This utility model belongs to the field of hoists, specifically relating to a single-chain hoist. Background Technology

[0002] As a type of vertical lifting equipment, hoists are widely used in various fields such as automated warehouses (AS / RS), manufacturing, and construction. Currently, hoist technology is relatively mature, but there are still many shortcomings in practical applications.

[0003] Currently, most hoists on the market adopt a multi-chain structure. For example, the double-sprocket hoist disclosed in Chinese patent CN201621197351.7 includes a lifting frame, a carrying chassis, and a lifting system. The lifting system has a drive device, a drive shaft, a driven shaft, double sprockets, a single sprocket, a first chain, a second chain, and a counterweight. The first and second chains are both set in pairs, resulting in a total of four sets of sprocket and chain mechanisms. While this multi-chain structure has strong load-bearing capacity and is suitable for heavy-duty applications, its large number of parts leads to a complex overall structural layout, requires strict assembly processes, and significantly wastes installation time and costs. Furthermore, placing the power motor at the top of the lifting frame makes routine inspection and maintenance inconvenient.

[0004] For many light-load applications (such as small parts, lightweight material boxes, etc.), the structure of the aforementioned multi-chain hoist appears overly complex and redundant. Its complex transmission system, designed for heavy loads, results in unnecessary resource waste under light-load conditions, including excessively high manufacturing costs, complex installation processes, and unnecessary maintenance expenses. Therefore, there is an urgent need in the field for a hoist solution optimized for light-load conditions, with a simplified structure, reasonable layout, convenient installation, and easy maintenance, to fill the gap in existing technology and meet broader market demands. Utility Model Content

[0005] To address the technical problems existing in the prior art, this utility model provides a single-chain hoist to overcome the shortcomings of existing multi-chain hoists, which have complex structures and are not suitable for light-load applications.

[0006] In this embodiment of the utility model, a single-chain hoist includes a lifting frame, a drive device, a closed-loop transmission mechanism composed of a single chain, a car, and a counterweight box. The chain of the closed-loop transmission mechanism is arranged around the lifting frame and meshes with multiple sprockets, one of which is a driving sprocket and the others are driven sprockets. The output end of the drive device is connected to the driving sprocket to drive the chain. The car is vertically slidably connected inside the lifting frame. The car and the counterweight box are respectively fixed to both sides of the chain and move up and down in opposite directions as the chain rotates.

[0007] Compared with the prior art, the beneficial effects of the superior technical solution of this utility model include:

[0008] 1. This utility model adopts a closed-loop transmission mechanism composed of a single chain, and rationally arranges the sprockets, car, and counterweight box, which greatly simplifies the overall structure of the hoist; moreover, it reduces the number of parts, lowers manufacturing costs and assembly difficulty, and saves installation time. This single-chain hoist abandons the unnecessary complex design of multiple chains in heavy-duty hoists, achieving a balance between economy and practicality while meeting the needs of light-load conditions.

[0009] 2. This utility model places the drive device at the bottom, at or near the ground, so that maintenance personnel can directly and safely approach the drive device to perform daily inspections, maintenance and troubleshooting without having to climb to a high place or use special high-altitude work equipment.

[0010] 3. The drive unit uses a servo motor and a reducer. The servo motor has high controllability and precision, which can achieve precise control of the car position and improve the synchronization of operation to a higher level, resulting in smooth operation.

[0011] 4. A guiding mechanism consisting of a first guide wheel and a first guide rail, as well as a second guide wheel and a second guide rail, is provided to effectively guide and limit the lifting and lowering movements of the car and counterweight box, preventing them from shaking or swaying during operation and improving the safety and stability of the hoist operation.

[0012] 5. This utility model fundamentally enhances the overall structural rigidity and stability of the hoist by rigidly connecting the vertical column and the lifting frame to form an integrated frame structure, effectively suppressing the shaking of the car during operation and improving the smoothness, safety and positioning accuracy of operation. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of a single-chain hoist according to an embodiment.

[0014] Figure 2 yes Figure 1 A magnified view of section A in the image.

[0015] Figure 3 This is a front structural diagram of a single-chain hoist according to an embodiment.

[0016] The reference numerals in the accompanying drawings include: chain 1, sprocket 2, sprocket seat 3, car 4, counterweight box 5, fixed seat 6, reducer 7, servo motor 8, first guide wheel 9, first guide rail 10, second guide wheel 11, second guide rail 12, lifting frame 13, vertical warehouse column 14, first baffle 15, second baffle 16, and third baffle 17. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0018] This embodiment provides a single-chain hoist, such as Figures 1-3 As shown, in a preferred embodiment, the hoist includes a lifting frame 13, a drive unit, a closed-loop transmission mechanism consisting of a single chain 1, a car 4, and a counterweight box 5. The chain 1 of the closed-loop transmission mechanism is wound around the lifting frame 13 and meshes with multiple sprockets 2. The multiple sprockets 2 tension the chain 1 for power transmission. One of the multiple sprockets 2 is the driving sprocket 2, and the others are driven sprockets 2. The output end of the drive unit is connected to the driving sprocket 2 to drive the chain 1. The lifting frame 13 has four hoist columns distributed at the four apex corners of a rectangle. The car 4 is located in the space enclosed by the four hoist columns and is vertically slidably connected within the lifting frame 13. The car 4 and the counterweight box 5 are fixed to both sides of the chain 1 and move in opposite directions as the chain 1 rotates.

[0019] In a preferred embodiment, the drive unit is located at the bottom of the lifting frame 13, for example, on the right side of the bottom of the lifting frame 13, for easy maintenance. The drive unit is mounted on the ground or the lifting frame 13 via a fixed base 6, facilitating overall installation and disassembly. Specifically, the drive unit includes a servo motor 8 and a reducer 7 connected to the output shaft of the servo motor 8. The output shaft of the reducer 7 is coaxially and fixedly connected to the drive sprocket 2. The output shaft of the reducer 7 extends in the front-to-back direction, driving the drive sprocket 2 to rotate vertically, thereby causing the chain 1 to run. Both the servo motor 8 and the reducer 7 are mounted on the ground or the lifting frame 13 via the fixed base 6. The output shaft of the reducer 7 is rotatably connected to the fixed base 6, and a rotating bearing is provided at the connection point to reduce friction.

[0020] In this invention, a controller is used to control the servo motor 8, thereby achieving automation and intelligence in the operation of the hoist, and the hoisting speed and position can be precisely controlled as needed.

[0021] In this invention, the chain 1 is arranged in a vertical rectangle, with at least one sprocket 2 at each of the four corners of the rectangular chain 1 to support the chain 1 and ensure its operation. Specifically, the chain 1 includes an upper horizontal section at the top of the lifting frame 13, a lower horizontal section at the bottom of the lifting frame 13, and two parallel vertical sections. The upper end of the vertical section of the chain 1 is connected to the upper horizontal section, and the lower end of the vertical section of the chain 1 is connected to the lower horizontal section. The lower horizontal section of the chain 1 is located below the car 4 so that the chain 1 wraps around the outside of the car 4. The car 4 and the counterweight box 5 are fixedly connected to the two vertical sections respectively. For example, the car 4 is fixedly connected to the vertical section on the left side of the chain 1, and the counterweight box 5 is fixedly connected to the vertical section on the right side of the chain 1.

[0022] The chain 1 in the above scheme is a rectangular closed-loop structure that surrounds the outside of the car 4, which makes the transmission path regular and the force clear, making full use of the internal space of the lifting frame 13 and achieving a compact overall layout. Fixing the car 4 and the counterweight box 5 on the vertical sections on both sides of the chain 1 makes the transmission relationship the most direct and efficient. The movement of the chain 1 can be converted into the opposite linear movement of the car 4 and the counterweight box 5 without delay, effectively avoiding the lag or energy loss that may exist in the intermediate transmission links, and improving the synchronization and response efficiency of the transmission.

[0023] In this embodiment, the sprocket 2 connected to the output shaft of the reducer 7 is the driving sprocket 2, located at the lower right corner of the rectangular chain 1. The sprockets 2 at the lower left, upper left, and upper right corners of the rectangular chain 1 are driven sprockets 2. The driven sprockets 2 are rotatably mounted on the fixedly installed sprocket seats 3. The sprocket seats 3 are fixedly installed at the corresponding positions of the lifting frame 13. For example, the sprocket seats 3 at the upper left and upper right corners are fixedly connected to the mounting plate at the top of the lifting frame 13, and the sprocket seat 3 at the lower left corner is fixedly connected to the lifting frame 13 or the ground through a bracket.

[0024] like Figure 1 As shown, in another preferred embodiment, the hoist further includes a fixedly installed vertically extending first guide rail 10, which is fixedly mounted on the lifting frame 13. The counterweight box 5 is provided with first guide wheels 9 that cooperate with the first guide rail 10. The first guide wheels 9 are embedded in the first guide rail 10 and roll along it. Preferably, four first guide wheels 9 are installed on the counterweight box 5, for example, at the four corners of its rectangle. The four first guide wheels 9 are embedded in pairs on two parallel first guide rails 10. The guiding mechanism composed of the first guide rails 10 and the first guide wheels 9 provides vertical constraint for the lifting movement of the counterweight box 5, ensuring that it always runs smoothly along a predetermined trajectory and effectively eliminating any swaying or rotation that may occur during operation.

[0025] like Figure 2 and Figure 3As shown, in another preferred embodiment, the hoist also includes a vertically extending second guide rail 12 fixedly mounted on the lifting frame 13. The car 4 is equipped with second guide wheels 11 that cooperate with the second guide rail 12, with the second guide wheels 11 embedded in and rolling along the second guide rail 12. Preferably, a set of second guide wheels 11 is installed on each of the left and right sides of the car 4, with the two sets of second guide wheels respectively embedded in the second guide rails 12 on the left and right sides of the car 4. The guiding mechanism composed of the second guide rail 12 and the second guide wheels 11 provides vertical constraint for the lifting movement of the car 4, ensuring that it always runs smoothly along a predetermined trajectory and effectively eliminating any possible swaying or rotation of the car 4 during operation.

[0026] like Figure 1 and Figure 3 As shown, in another preferred embodiment of this utility model, the lifting frame 13 and the vertical storage column 14 are fixedly connected by multiple connecting plates to form an integrated frame structure. The connecting plates include multiple first baffles 15 extending laterally at intervals along the height direction, multiple sets of second baffles 16 extending obliquely upward at intervals along the height direction, and multiple sets of third baffles 17 extending obliquely downward at intervals along the height direction. The second baffles 16 and the first baffles 15 have opposite inclination directions. The first baffles 15, second baffles 16, and third baffles 17 are all simultaneously fixedly connected to the vertical storage column 14 and the lifting frame 13's hoisting column, for example, by welding or bolting.

[0027] When the hoist is running, if the car 4 needs to be raised or lowered, the servo motor 8 receives a signal and starts working. The servo motor 8 drives the reducer 7 to rotate the drive sprocket 2. The drive sprocket 2 drives the chain 1, which meshes with it, to circulate along a rectangular closed-loop path. Since the car 4 and the counterweight box 5 are fixed on the left and right sides of the chain 1 respectively, the movement of the chain 1 is directly converted into their opposite lifting and lowering movements. For example, when the chain 1 rotates clockwise, the car 4 rises, and the counterweight box 5 falls synchronously; and vice versa. Throughout the entire movement, the cooperation between the first guide wheel 9 and the second guide rail 12, as well as between the second guide wheel 11 and the second guide rail 12, ensures the straightness and stability of the operation.

[0028] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A single-chain elevator, characterized in that, It includes a lifting frame, a drive unit, a closed-loop transmission mechanism consisting of a single chain, a car, and a counterweight box; The chain of the closed-loop transmission mechanism is arranged around the lifting frame and meshes with multiple sprockets. One of the multiple sprockets is the driving sprocket, and the rest are driven sprockets. The output end of the drive device is connected to the drive sprocket and is used to drive the chain to rotate; The car is vertically slidably connected inside the lifting frame. The car and the counterweight box are respectively fixed to both sides of the chain and move up and down in opposite directions as the chain rotates.

2. The single-chain elevator according to claim 1, characterized in that, The drive unit is located at the bottom of the lifting frame.

3. A single-chain elevator according to claim 2, characterized in that, The drive unit is mounted on the ground or on the lifting frame via a fixed base.

4. A single-chain elevator according to claim 2, characterized in that, The drive device includes a servo motor and a reducer connected to the output shaft of the servo motor. The output shaft of the reducer is coaxially and fixedly connected to the drive sprocket.

5. A single-chain elevator according to claim 1, characterized in that, The chain is arranged in a vertical rectangle, with at least one sprocket at each of the four corners of the rectangular chain; And / or the chain includes an upper horizontal section, a lower horizontal section, and two parallel vertical sections, with the car and counterweight box respectively fixedly connected to the two vertical sections.

6. A single-chain elevator according to claim 1, characterized in that, The driven sprocket is rotatably mounted on a fixedly installed sprocket seat, which is fixedly installed at the corresponding position of the lifting frame.

7. A single-chain elevator according to claim 1, characterized in that, It also includes a fixedly installed vertically extending first guide rail, and the counterweight box is provided with a first guide wheel that cooperates with the first guide rail. The first guide wheel is embedded in the first guide rail and rolls along it.

8. A single-chain elevator according to claim 1, characterized in that, It also includes a fixedly installed vertically extending second guide rail, and the car is provided with a second guide wheel that cooperates with the second guide rail. The second guide wheel is embedded in the second guide rail and rolls along it.

9. A single-chain elevator according to any one of claims 1-8, characterized in that, The lifting frame and the vertical warehouse columns are fixedly connected by multiple connecting plates to form an integrated frame structure.

10. A single-chain elevator according to claim 9, characterized in that, The connecting plate includes multiple first baffles that extend laterally at intervals along the height direction, multiple sets of second baffles that extend obliquely upward at intervals along the height direction, and multiple sets of third baffles that extend obliquely downward at intervals along the height direction.

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