A screw lifting device of a track conveyor

Abstract

The utility model discloses a screw rod lifting device of track conveying vehicle, include: the screw rod lifting mechanism (1) of upper platform (9) installation, track conveying vehicle is installed below the upper platform, the screw rod lifting mechanism includes the reversing mechanism, screw rod lifting machine (1) and install low pressure direct current servo motor (8) on the motor base. Can ensure that track conveying vehicle transfers and loads steady and reliable, the characteristics that good synchronism.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle equipment technology, and in particular relates to a screw lifting device for a rail transport vehicle. Background Technology

[0002] For most small and lightweight products, cross-station transfer is flexible and can be achieved using robotic arms, gantry cranes, etc. However, lifting devices are frequently needed. Existing lifting devices are generally scissor-type, using hydraulic cylinders as transmission components to lift the platform in a scissor-like manner. This type of lifting device experiences significant stress on the scissor forks during the lifting process, posing a risk of oil leakage, contaminating the entire working environment, and disrupting the smooth operation of the production line, resulting in substantial production losses. Furthermore, for large and heavy parts, there are significant limitations. Industrial robots typically have heavy load capacities, around 1 ton, and even robots with specific heavy loads often lack the reach to meet production needs, preventing many companies with large product specifications from implementing automated transfer. Therefore, it is necessary to develop a lifting mechanism for loading and unloading large, heavy-duty products. Utility model content:

[0003] The present invention aims to overcome the defects of the prior art and provide a screw lifting device for a rail transport vehicle. It has the characteristics of simple structure, reasonable design, and can ensure smooth and reliable transfer of rail transport vehicles with good synchronization.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] A screw lifting device for a rail transport vehicle includes: a screw lifting mechanism 1 installed on an upper platform, and a rail transport vehicle installed below the upper platform. The screw lifting mechanism includes a reversing mechanism, a screw lift 1, and a low-voltage DC servo motor 8 installed on a motor base.

[0006] Preferably, the lower part of the screw jack is fixedly connected to the upper platform. A commutation mechanism is installed at the front end of the low-voltage DC servo motor 8. The commutation mechanism includes a first commutator 6 and a second commutator 4 with identical structures. The output shaft of the low-voltage DC servo motor 8 is detachably connected to the transmission input shaft of the first commutator 6 through a coupling. A short transmission output shaft 7 is installed on both sides of the first commutator 6. The short transmission output shaft 7 is connected to a second commutator 4. A long transmission output shaft 2 is installed on both sides of the second commutator 4. The second commutator 4 is connected to the screw jack 1 through the long transmission output shaft 2. Each second commutator 4 transmits power to the two screw jacks 1 on both sides of the second commutator 4.

[0007] Preferably, the first commutator mechanism 6 and the second commutator 4 are both fixedly installed on the upper platform by fasteners. The first commutator 6 includes a housing, a transmission input shaft, two transmission output short shafts 7, an input bevel gear, an output bevel gear, and bearings. The transmission input shaft and the transmission output shaft are T-shaped and are driven by the meshing of the bevel gears to achieve the purpose of reversing. At the same time, by adjusting the size of the input gear and the output gear, the purpose of deceleration or acceleration can be achieved.

[0008] Preferably, the four screw jacks are arranged in a grid pattern on the upper platform; the lower parts of the four screw jacks are fixedly connected to the four corners of the bottom surface of the upper platform using fasteners.

[0009] Preferably, the low-voltage DC servo motor 8 is located at the center of the four screw jacks.

[0010] Preferably, the motor mount is fixed to the bottom surface of the upper platform of the rail transport vehicle.

[0011] Preferably, one end of the transmission output long shaft 2 is connected to a first coupling 3 installed on the second commutator 4, and one end of the transmission output short shaft 7 is connected to a second coupling 5 installed on the second commutator 4.

[0012] Preferably, the screw jack includes a worm gear reducer and a lifting screw 11 passing through the upper platform. The worm gear reducer's worm wheel is connected to a second commutator 4 via a transmission output shaft 2. The second commutator 4 drives the transmission output shaft 2 to rotate, which in turn drives the worm wheel to rotate. The lifting screw passes through and is connected to the worm wheel. The rotation of the worm wheel drives the lifting screw to move up and down. Its speed reduction component is a worm gear drive, which uses the worm to drive the worm wheel to achieve speed reduction. The worm wheel and the matching lifting screw are rotatably connected, driving the lifting screw to move up and down.

[0013] This utility model also provides a rail conveyor vehicle, including: a rail conveyor vehicle body, a drive wheel 10 mounted on the rail conveyor vehicle body, the drive wheel 10 having a rim that rolls on the rail, an electrical control cabinet on both sides of the bottom of the rail conveyor vehicle frame, and a battery for power supply in the electrical control cabinet; the rail conveyor vehicle body is equipped with a screw lifting device as described above.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This utility model utilizes a synchronous screw jack as the lifting mechanism, enabling stable and low-speed lifting of the platform. This ensures stable and reliable transfer of rail transport vehicles. A low-voltage DC servo motor provides power, offering good synchronization and practicality. The trapezoidal screw has a static load self-locking function, maintaining its self-locking state even without a braking device. Slippage is prevented, ensuring high safety and low cost. Low speed: Suitable for high-load, low-speed applications and infrequent operation. Modular structure: The product has a compact and modular structure, allowing for easy connection to various auxiliary accessories and drive sources. Environmentally friendly and low-noise: The product operates with low noise and uses grease lubrication, eliminating leakage. Versatile installation structure: Supports various installation structures, including horizontal, longitudinal, and angled installations. Intelligent: The product can achieve automated intelligent control by installing various components and drive control systems. Long service life: The core internal component, the worm gear, uses highly wear-resistant materials such as aluminum bronze, extending the product's lifespan. High load-bearing capacity: The worm gear mechanism has a large transmission ratio, converting small torque input into large torque output. Ball screws (or trapezoidal screws) efficiently convert rotary motion into linear motion and can withstand very large axial loads. The combination of these two properties allows the structure to provide extremely high thrust and tension, making it suitable for heavy-duty lifting applications.

[0016] Precise positioning and repeatability: Ball screws offer extremely high transmission and repeatability, reaching ±0.05mm or even higher. Trapezoidal screws also meet many industrial requirements. Zero backlash design: High-quality worm gear and screw-nut pairs allow for preload to eliminate backlash, ensuring smooth transmission, precise positioning, and no backlash. Synchronous control: Multiple lifting units achieve precise synchronous movement through rigid linkage shafts, synchronous belts, or electronic control systems (such as servo motors and controllers), ensuring the parallelism and positional consistency of the lifting platform. This is crucial for large platforms or applications requiring strict leveling. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the screw lifting device of the rail transport vehicle of this utility model;

[0018] Figure 2 This is a side view of the screw lifting device of the rail transport vehicle of this utility model.

[0019] Figure 3 This is a top view schematic diagram of the screw lifting device of the rail transport vehicle of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the rail transport vehicle before lifting, which is a screw lifting device for the rail transport vehicle of this utility model.

[0021] Figure 5This is a schematic diagram of the structure of the rail transport vehicle after the screw lifting device of the rail transport vehicle of this utility model is lifted.

[0022] In the diagram: ①-Screw jack; ②-Long shaft; ③-First coupling; ④-Second commutator; ⑤-Second coupling; ⑥-First commutator; ⑦-Short shaft; ⑧-Low-voltage DC servo motor; Detailed Implementation

[0023] To better illustrate this utility model, a detailed description is provided below in conjunction with the accompanying drawings.

[0024] Example 1

[0025] This utility model provides a screw lifting device for a rail transport vehicle, such as... Figure 1 , Figure 2 As shown, it includes: a screw lifting mechanism 1 installed on the upper platform 9, and a rail conveyor car installed below the upper platform. The screw lifting mechanism includes a reversing mechanism, a screw lift 1, and a low-voltage DC servo motor 8 installed on a motor base.

[0026] Preferably, the lower part of the screw jack is fixedly connected to the upper platform. A commutation mechanism is installed at the front end of the low-voltage DC servo motor 8. The commutation mechanism includes a first commutator 6 and a second commutator 4 with identical structures. The output shaft of the low-voltage DC servo motor 8 is detachably connected to the transmission input shaft of the first commutator 6 through a coupling. A short transmission output shaft 7 is installed on both sides of the first commutator 6. Each short transmission output shaft 7 is connected to a second commutator 4. A long transmission output shaft 2 is installed on both sides of the second commutator 4. Each second commutator 4 is connected to the screw jack 1 through a long transmission output shaft 2. Each second commutator 4 transmits power to the two screw jacks 1 on both sides of the second commutator 4.

[0027] Preferably, the first commutator mechanism 6 and the second commutator 4 are both fixedly installed on the upper platform by fasteners. The first commutator 6 includes a housing, a transmission input shaft and two transmission output short shafts 7, an input bevel gear, an output bevel gear, and bearings. The transmission input shaft and the transmission output shaft are T-shaped and intersected. The shaft transmission is reversed by the meshing of the bevel gears. At the same time, the speed can be reduced or increased by adjusting the size of the input gear and the output gear.

[0028] Preferably, the four screw jacks are arranged in a grid pattern on the upper platform; the lower parts of the four screw jacks are fixedly connected to the four corners of the bottom surface of the upper platform using fasteners.

[0029] Preferably, the low-voltage DC servo motor 8 is located at the center of the four screw jacks.

[0030] Preferably, the motor mount is fixed to the bottom surface of the upper platform of the rail transport vehicle.

[0031] Preferred, such as Figure 3 As shown, the screw jack includes a worm gear reducer and a lifting screw 11 passing through the upper platform. The worm gear reducer's worm wheel is connected to a second commutator 4 via a transmission output shaft 2. The second commutator 4 drives the transmission output shaft 2 to rotate, which in turn drives the worm gear to rotate. The lifting screw passes through and is connected to the worm gear. The rotation of the worm gear drives the lifting screw to move up and down. Its speed reduction component is a worm gear drive, which uses the worm to drive the worm gear to achieve speed reduction. The worm gear and the matching lifting screw are rotatably connected, driving the lifting screw to move up and down.

[0032] A screw jack, also known as a screw drive mechanism, is mainly used to convert rotary motion into linear motion or vice versa. A screw jack consists of a worm gear reducer and a screw. Its reduction component is a worm gear drive, which uses the worm to drive the worm wheel to achieve speed reduction. The worm wheel acts as the nut for the lifting screw, and the worm wheel and lifting screw are matched. The screw jack utilizes existing technology, such as trapezoidal screw jacks and ball screw jacks. One servo motor simultaneously drives four screw jacks to rise or fall synchronously, ensuring the smooth operation of the upper platform.

[0033] Preferably, one end of the transmission output long shaft 2 is connected to a first coupling 3 installed on the second commutator 4, and one end of the transmission output short shaft 7 is connected to a second coupling 5 installed on the second commutator 4.

[0034] Preferably, a top plate is provided at the top of the lead screw, and a tooling is placed on the top plate 1.

[0035] Preferably, both the short transmission output shaft 7 and the long transmission output shaft 2 are made of 40Cr alloy steel, which are transmission shafts capable of withstanding large loads and high-speed rotation, and have high strength and hardness.

[0036] First coupling 3 and second coupling 5: also known as couplings, are mechanical components used to firmly connect the driving shaft and driven shaft in different mechanisms to rotate together and transmit motion and torque.

[0037] Preferably, the upper platform is a rectangular frame made of welded steel to ensure a flat and stable structure; the screw jack can accurately control and adjust the lifting or lowering distance.

[0038] Example 2

[0039] like Figure 4 , 5As shown, when this utility model is in use, the low-voltage DC servo motor 8 starts to operate when the material on the upper platform is lifted and transferred. Its output shaft drives the first commutator 6 to rotate through the coupling. The two ends of the first commutator 6 are connected to the second coupling 5, which simultaneously drives the left and right side transmission output short shafts 7 to rotate. The rotation of the transmission output short shafts 7 is then connected to the second commutator 4 through the second coupling 5. The output shafts at both ends of the second commutator 4 are connected to the first coupling 3, which simultaneously drives the left and right side transmission output long shafts 2 to rotate. The transmission output long shafts 2 are then connected to the first coupling 3. The first coupling 3 transmits the rotational power to the four screw jacks 1 simultaneously through the transmission gear mechanism. The four screw jacks 1 operate synchronously to lift the upper platform. When the appropriate position is reached, the material is removed by other transfer equipment. The low-voltage DC servo motor 8 then moves in the opposite direction, and the upper platform descends to wait for the next material to be lifted and transferred.

[0040] This utility model also provides a rail conveyor vehicle, comprising: a rail conveyor vehicle body, on which drive wheels 10 are mounted, the drive wheels 10 having rims that roll on the rail to effectively achieve driving movement; electrical control cabinets are provided on both sides of the bottom of the rail conveyor vehicle frame, the electrical control cabinets containing batteries or power supplies for power supply; a screw lifting device as described above is installed on the rail conveyor vehicle body, and a tooling 12 is placed above the screw lifting mechanism 1. The electrical control cabinet is installed at the bottom of the rail conveyor vehicle body and is used for powering the conveyor vehicle's movement and the lifting device.

[0041] Although the present invention has been described in detail above with general descriptions, specific embodiments, and experiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A screw lifting device for a rail transport vehicle, comprising: A screw lifting mechanism (1) is installed on the upper platform (9), and a rail conveyor is installed below the upper platform; characterized in that the screw lifting mechanism includes a reversing mechanism, a screw lift (1) and a low-voltage DC servo motor (8) installed on a motor base.

2. The screw lifting device for a rail conveyor vehicle according to claim 1, characterized in that, The lower part of the screw jack (1) is fixedly connected to the upper platform (9). A commutation mechanism is installed at the front end of the low-voltage DC servo motor (8). The commutation mechanism includes a first commutator (6) and a second commutator (4) with the same structure. The output shaft of the low-voltage DC servo motor (8) is detachably connected to the transmission input shaft of the first commutator (6) through a coupling. A short transmission output shaft (7) is installed on both sides of the first commutator (6). The short transmission output shaft (7) is connected to a second commutator (4). A long transmission output shaft (2) is installed on both sides of the second commutator (4). The second commutator (4) is connected to the screw jack (1) through the long transmission output shaft (2). Each second commutator (4) transmits power to the two screw jacks (1) on both sides of the second commutator (4).

3. The screw lifting device for a rail conveyor vehicle according to claim 2, characterized in that, The first commutator mechanism (6) and the second commutator (4) are both fixedly installed on the upper platform by fasteners. The first commutator (6) includes a housing, a transmission input shaft and two transmission output short shafts (7), an input bevel gear, an output bevel gear, and a bearing. The transmission input shaft and the transmission output shaft are distributed in a T-shape.

4. The screw lifting device for a rail transport vehicle according to claim 2, characterized in that, Four screw jacks (1) are arranged in a grid pattern on the upper platform (9); the lower part of the four screw jacks and the four corners of the bottom surface of the upper platform are fixedly connected with fasteners.

5. The screw lifting device for a rail transport vehicle according to claim 4, characterized in that, The low-voltage DC servo motor (8) is located at the center of the four screw jacks.

6. The screw lifting device for a rail conveyor vehicle according to claim 1, characterized in that, The motor mount is fixed to the bottom surface of the upper platform of the rail transport vehicle.

7. The screw lifting device for a rail transport vehicle according to claim 2, characterized in that, One end of the transmission output long shaft (2) is connected to a first coupling (3) installed on the second commutator (4), and one end of the transmission output short shaft (7) is connected to a second coupling (5) installed on the second commutator (4).

8. The screw lifting device for a rail conveyor vehicle according to claim 2, characterized in that, The screw jack includes a worm gear reducer and a lifting screw (11) passing through the upper platform. The worm gear of the worm gear reducer is connected to the second commutator (4) through the transmission output long shaft (2). The second commutator (4) drives the transmission output long shaft to rotate, and the transmission output long shaft drives the worm gear to rotate. The lifting screw passes through and is connected to the worm gear. The rotation of the worm gear drives the lifting screw to move up and down.

9. A rail transport vehicle, characterized in that, The system includes a rail conveyor body, which is equipped with drive wheels (10), the drive wheels (10) having rims that roll on the rail, and electrical control cabinets on both sides of the bottom of the rail conveyor frame; the rail conveyor body is equipped with a screw lifting device as described in any one of claims 1-8.

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