Lead screw guide rail type four-column elevator

Abstract

The utility model relates to the technical field of conveying mechanisms, aims to solve the technical problems of large occupied space and poor transmission stability of an existing synchronous belt transmission mode, and discloses a lead screw guide rail type four-column elevator which comprises a frame type structure composed of four stand columns. Each stand column is connected with a bracket through a lead screw driving mechanism, and each bracket is provided with a lifting positioning pin assembly. The lead screw driving mechanism comprises a transmission seat, a bearing seat and a servo motor, the transmission seat and the bearing seat are fixedly connected to the stand column, a ball screw is arranged between the transmission seat and the bearing seat, the servo motor is connected with the ball screw through a coupler, linear guide rails are arranged on the two sides of the ball screw respectively, and the linear guide rails are fixedly connected to the stand column. The lifting mode of a synchronous belt and a synchronous pulley is replaced by ascending and descending actions achieved through rotation of the ball screw, the space utilization rate is increased, transportation is stable, and the load capacity is improved.

Description

Technical Field

[0001] This utility model relates to the field of conveying mechanism technology, and in particular to a screw guide rail type four-column lifting machine. Background Technology

[0002] In the lifting and transportation of automotive parts in body-in-white, synchronous belt drives are widely used due to their mature technology and high market acceptance. However, this transmission method has significant limitations, especially given the increasing demands for compact equipment and ease of maintenance in modern industry. Synchronous belt drive structures typically require considerable space for installation, particularly when lifting heights or carrying heavy loads, placing high demands on the overall site and equipment layout. Furthermore, synchronous belts are prone to loosening and aging over long-term use, leading to decreased transmission efficiency and further exacerbating operational instability.

[0003] Meanwhile, during the lifting and transmission process, the timing belt is prone to tooth skipping due to the meshing of the teeth and pulleys. Once tooth skipping occurs, it can not only cause the lifting platform to malfunction and disrupt transmission, but also generate significant vibration and noise, affecting the equipment's operational stability and safety. More seriously, tooth skipping can cause transported parts to fall off the platform, posing a potential threat to the continuity of the production line and the safety of operators. Furthermore, if the timing belt breaks, extensive disassembly and replacement of related components are required. This not only increases the complexity of maintenance but also requires a considerable amount of repair time, making it difficult to quickly restore normal operation and thus adversely affecting production efficiency.

[0004] In summary, existing synchronous belt drives suffer from problems such as large space requirements, poor transmission stability, complex maintenance, and safety hazards. These issues severely restrict the practical application of lifting equipment in industry. Therefore, there is an urgent need for a lifting device that is easy to maintain, compact in structure, operates smoothly, and is safe and reliable to solve the aforementioned technical challenges. Utility Model Content

[0005] The purpose of this utility model is to provide a screw-guided four-column lifting machine to solve the technical problems of large space occupation and poor transmission stability of the existing synchronous belt drive method.

[0006] To achieve the above objectives, this utility model provides a screw-guided four-column lifting platform, comprising a frame structure consisting of four columns. Each column is connected to a bracket via a screw drive mechanism, and the bracket is equipped with a lifting positioning pin assembly. The screw drive mechanism includes a transmission seat and a bearing seat fixedly connected to the column, as well as a servo motor. A ball screw is disposed between the transmission seat and the bearing seat. The servo motor is connected to the ball screw via a coupling. Linear guide rails are disposed on both sides of the ball screw, and the linear guide rails are fixedly connected to the column. The bracket design is optimized to accommodate the lifting of heavy objects. The lifting positioning pin assembly is used to fix and position the lifting position, thereby improving the safety and repeatability of the lifting action. The servo motor drives the ball screw to rotate, converting the rotational motion into linear lifting of the bracket. The slider system provides high-precision guidance, and the entire lifting process achieves low-friction operation under the action of an automatic lubrication system.

[0007] Furthermore, the tops of the four columns are fixedly connected by crossbeams, at least two side beams are fixedly connected between two closely spaced columns, and base plate assemblies are fixedly connected to the bottom of the columns.

[0008] Furthermore, the ball screw is provided with two nut fixing seats, one upper and one lower, and multiple sliders are installed on the linear guide. A cover is provided that is fixedly connected to the nut fixing seats and the sliders respectively, and a bracket is fixedly connected to the cover.

[0009] Furthermore, each nut holder corresponds to four sliders, and each cover is fixedly connected to one nut holder and four sliders respectively. Two covers are formed on each column, one upper and one lower, connected by a flexible accordion cover. The accordion cover is used to prevent dust and foreign objects from damaging the ball screw and the linear guide.

[0010] Furthermore, an upper baffle is provided between the servo motor and the coupling, and a buffer block is installed below the transmission seat. The buffer block is used to absorb impact loads under extreme conditions and protect the lead screw drive mechanism from damage.

[0011] Furthermore, the linear guide is arranged along the length of the column and fixed in parallel with the ball screw, while the slider provides smooth linear guidance through sliding contact.

[0012] The screw-guide rail type four-column lifting machine provided by this utility model has the following advantages:

[0013] This utility model provides a ball screw guide rail type four-column lifting platform. Through the combination of a ball screw and a linear guide rail, it not only achieves high-precision lifting of the bracket but also significantly improves space utilization, meeting the requirements of modern industry for compact equipment structure. The ball screw transmission avoids the risk of tooth skipping associated with synchronous belts, resulting in smooth lifting motion and low operating noise, further enhancing the operational stability and safety of the equipment. Simultaneously, the linear guide rail system provides efficient linear guidance, ensuring that the bracket does not tilt or sway during lifting, thus effectively solving the risk of parts falling during transport. This utility model uses the rotation of the ball screw to achieve lifting and lowering movements, replacing the lifting methods of synchronous belts and pulleys, improving space utilization, ensuring smooth transport, and increasing load capacity. Attached Figure Description

[0014] Figure 1 A three-dimensional view of the screw-guide rail type four-column lifting machine provided by this utility model;

[0015] Figure 2 The present utility model provides a solution for... Figure 1 Enlarged view of point A in the middle;

[0016] Figure 3 The present utility model provides a solution for... Figure 1 Enlarged view of point B in the middle;

[0017] Figure 4 The main view of the single column and its auxiliary structural components provided by this utility model.

[0018] In the diagram: 30. Elevator; 31. Crossbeam; 32. Column; 33. Connecting beam; 34. Bracket; 35. Cover; 301. Bellows guard; 302. Upper cover plate; 303. Coupling; 304. Buffer block; 305. First silicone protective coil; 306. Pointer; 307. Linear guide rail; 308. Lower baffle; 309. Lower cover plate; 310. Second silicone protective coil; 311. Servo motor; 312. Upper baffle; 31 3. Transmission seat; 314. Ball screw; 315. Nut fixing seat; 316. Knurled pin shaft; 317. Bracket; 318. First sensor; 319. Third silicone coil protector; 320. Bearing seat; 321. Manual pin assembly; 322. Second sensor; 323. Limit switch assembly; 324. Positioning pin assembly; 325. Third sensor; 326. Foot plate assembly; 341. Lifting positioning pin assembly; 342. Sensing block. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0020] See Figures 1 to 4 This utility model provides an improved screw-guided four-column lifting platform. The lifting platform 30 includes four columns 32, and its core structure is a frame structure composed of the four columns 32. The tops of two columns 32 that are far apart are fixedly connected by a crossbeam 31 to ensure the rigidity and stability of the overall structure. At least two side beams 33 are fixedly connected between two columns 32 that are close together to enhance the lateral support strength of the frame. The bottom of each column 32 is fixedly connected to a base plate assembly 326, providing a stable installation foundation and effectively distributing the load.

[0021] Bracket and positioning components:

[0022] Each column 32 is connected to a bracket 34 via a lead screw drive mechanism, and the bracket 34 is equipped with a lifting positioning pin assembly 341. The main function of the bracket 34 is to support the object being lifted and maintain stability and positioning accuracy during the lifting process. The lifting positioning pin assembly 341 is used to fix and position the lifting position, ensuring the safety and repeatability of the lifting action.

[0023] Screw drive mechanism:

[0024] Each column 32 is equipped with a screw drive mechanism for the lifting and lowering movement of the bracket 34. The main components of the screw drive mechanism include a transmission seat 313 and a bearing seat 320 fixedly connected to the column 32, and a servo motor 311. A ball screw 314 is provided between the transmission seat 313 and the bearing seat 320. The servo motor 311 is connected to the ball screw 314 through a coupling 303. Linear guide rails 307 are provided on both sides of the ball screw 314, and the linear guide rails 307 are fixedly connected to the column 32.

[0025] The transmission base 313 is fixedly mounted on the column 32 to support one end of the ball screw 314; the bearing housing 320 is fixed to the other end of the column for supporting the rotation of the ball screw. A servo motor is fixedly mounted on the transmission base 313 and connected to the ball screw 314 via a coupling 303, enabling precise control of the ball screw's rotation and thus achieving precise lifting and lowering of the bracket. The ball screw is positioned between the transmission base 313 and the bearing housing 320, with linear guide rails 307 mounted on both sides to provide precise guidance for the lifting motion. The axial positioning and rotary connection at both ends of the ball screw are optimized to ensure operational reliability.

[0026] Linear guide and slider system:

[0027] The ball screw 314 is provided with two nut fixing seats 315, and multiple sliders are installed on the linear guide 307. A cover 35 is provided that is fixedly connected to the nut fixing seat 315 and the slider respectively. A bracket 34 is fixedly connected to the cover 35.

[0028] Specifically, each nut fixing seat 315 corresponds to four sliders, and each cover 35 corresponds to one nut fixing seat 315 and four sliders respectively. Two covers 35 are formed on each column 32.

[0029] Linear guide 307 is arranged along the length of column 32 and fixed parallel to ball screw 314. Multiple sliders are mounted on the linear guide; the function of the sliders is to provide smooth linear guidance through sliding contact.

[0030] First, the slider is connected to the nut fixing seat 315 of the ball screw, so that the movement of the slider and the rotation of the screw are synchronized.

[0031] Second, each nut fixing seat 315 is fixed with two covers 35, one above the other. The covers 35 are connected to the slider, thereby fixing the bracket 34 on the slider system and ensuring that the bracket will not tilt or shake during the lifting process.

[0032] An upper baffle 312 is provided between the servo motor 311 and the coupling 303, and a buffer block 304 is installed below the transmission seat 313.

[0033] Protective structure:

[0034] To prevent dust, foreign objects, and other contaminants from affecting equipment operation, a flexible bellows cover 301 is installed between the upper and lower covers 35 of each column 32. The cover not only effectively protects the ball screw 314 and linear guide 307, but also extends the equipment's service life and reduces maintenance frequency.

[0035] Other auxiliary components:

[0036] Buffer block 304: A buffer block 304 is installed below the transmission seat 313 to absorb impact loads under extreme conditions and protect the lead screw drive mechanism from damage.

[0037] Upper baffle 312: An upper baffle 312 is provided between the servo motor 311 and the coupling 303 to prevent external objects from contacting the coupling and avoid damaging the equipment or affecting operational safety.

[0038] Working principle:

[0039] When the servo motor 311 drives the ball screw 314 to rotate, the nut fixing seat 315 moves along the thread of the ball screw, simultaneously driving the cover 35 and the bracket 34 to move linearly up and down via the connected slider. The slider system of the linear guide rail 307 provides stable support and high-precision guidance for the movement of the bracket. The entire lifting process achieves low-friction operation with the help of the automatic lubrication system, reducing energy consumption and wear.

[0040] The screw-guide rail type four-column lifting machine provided by this utility model has the following advantages:

[0041] High precision: The combination of ball screw and linear guide ensures high precision and stability of lifting motion; strong load capacity: The optimized bracket design can adapt to the lifting of heavy objects; stable operation: The flexible protective cover and buffer block protection structure enhance the reliability of the equipment.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A screw-guided four-column lifting platform, comprising a frame structure consisting of four columns (32), characterized in that, Each of the columns (32) is connected to a bracket (34) via a screw drive mechanism, and the bracket (34) is provided with a lifting and positioning pin assembly (341); The lead screw drive mechanism includes a transmission seat (313) and a bearing seat (320) fixedly connected to the column (32), and a servo motor (311). A ball screw (314) is provided between the transmission seat (313) and the bearing seat (320). The servo motor (311) is connected to the ball screw (314) through a coupling (303). Linear guide rails (307) are respectively provided on both sides of the ball screw (314), and the linear guide rails (307) are fixedly connected to the column (32).

2. The screw-guide rail type four-column lifting machine according to claim 1, characterized in that, The tops of the four columns (32) are fixedly connected by crossbeams (31), and at least two side beams (33) are fixedly connected between two closely spaced columns (32). The bottom of the columns (32) is fixedly connected to a base plate assembly (326).

3. The screw-guide rail type four-column lifting machine according to claim 2, characterized in that, The ball screw (314) is provided with two upper and lower nut fixing seats (315), the linear guide (307) is equipped with multiple sliders, and a cover (35) is provided that is fixedly connected to the nut fixing seat (315) and the slider respectively. The bracket (34) is fixedly connected to the cover (35).

4. The screw-guide rail type four-column lifting platform according to claim 3, characterized in that, Each of the nut fixing seats (315) corresponds to four of the sliders. Each of the cover bodies (35) is fixedly connected to one of the nut fixing seats (315) and four of the sliders. Two cover bodies (35) are formed on each of the columns (32), and a flexible bellows cover (301) is connected between the cover bodies (35).

5. The screw-guide rail type four-column lifting machine according to claim 4, characterized in that, An upper baffle (312) is provided between the servo motor (311) and the coupling (303), and a buffer block (304) is installed below the transmission seat (313).

6. The screw-guide rail type four-column lifting machine according to claim 5, characterized in that, The linear guide (307) is arranged along the length of the column (32) and fixed in parallel with the ball screw (314). The slider provides smooth linear guidance through sliding contact.

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