Double-screw elevator

Abstract

The utility model relates to the technical field of lifters, in particular to a double-screw lifter which comprises a base, two scissor arm assemblies are oppositely arranged at the top of the base, each scissor arm assembly is composed of a first scissor single arm and a second scissor single arm, the bottom of each scissor arm assembly is hinged to the base, and the top of each scissor arm assembly is connected with a jacking platform through a hinge seat. A driving assembly is arranged between the two scissor arm assemblies and comprises a driving frame body, a first lead screw, a second lead screw and a driving motor arranged in parallel. The first lead screw and the second lead screw are each provided with a driving base and connected with a jacking arm assembly, each jacking arm assembly is composed of a first jacking single arm and a second jacking single arm, one end of each jacking arm assembly is hinged to the corresponding driving base, and the other end of each jacking arm assembly is connected with a hinge long shaft on the corresponding scissor arm assembly. The driving motor drives the lead screw to rotate through transmission of the gear set, and stable lifting of the jacking platform is achieved. The bearing capacity and the operation stability are improved, meanwhile, the structural design is simplified, and the operation convenience and reliability are improved.

Description

Technical Field

[0001] This application relates to the field of lifting machine technology, and in particular to a twin screw lift. Background Technology

[0002] Lifting platforms, as multi-functional lifting and loading / unloading machinery, are widely used in industrial, commercial, and domestic fields for the vertical transport of goods or personnel. These devices use power sources such as electricity, hydraulics, or pneumatics to lift or lower loads, greatly improving work efficiency and ease of use. In recent years, with technological advancements and growing market demand, various types of lifting platforms have emerged, significantly promoting the development of related industries and improving production efficiency and service quality. Among existing lifting platform technologies, common types mainly include screw-type and chain-type. Chain-type lifting platforms typically use high-strength steel chains as the main load-bearing component, achieving platform lifting through the stretching and contraction of the chain. This design provides high load-bearing capacity and good stability, suitable for applications requiring large loads and high stability. However, chain-type lifting platforms have a relatively complex structure, higher installation and maintenance costs, and are prone to wear and tear and malfunctions after prolonged use, resulting in a large maintenance workload. In contrast, screw-type lifting platforms use threaded screws as the main driving component, converting the rotational motion of the screw into linear motion to achieve platform lifting. Screw-type lifting platforms have advantages such as simple structure, small footprint, and easy maintenance, making them suitable for various application scenarios. However, in practical applications, traditional single-screw lifting platforms suffer from poor stability due to having only one screw for support, especially under heavy loads or high lifting heights, making them prone to tilting or swaying, affecting safety and reliability.

[0003] To address the aforementioned issues, existing single-screw lifting platforms suffer from significant shortcomings in stability and load-bearing capacity. Especially after prolonged use, they are prone to instability, posing safety hazards to users. Therefore, improving the stability and load-bearing capacity of screw lifting platforms has become an urgent technical problem to be solved. Utility Model Content

[0004] To overcome the aforementioned technical problems, this application provides a double screw jack.

[0005] This application provides a double screw jack, which adopts the following technical solution:

[0006] A dual-screw jack includes a base with two opposing scissor arm assemblies on its top. Each scissor arm assembly includes a first scissor arm and a second scissor arm hinged in a scissor-like configuration. The bottoms of both the first and second scissor arms are hinged to the base via hinge seats. A lifting platform is hinged to the tops of both scissor arms via hinge seats. A drive assembly is positioned between the two scissor arm assemblies. The drive assembly includes a drive frame, on which a first screw, a second screw, and a drive motor are rotatably mounted. By adopting this technical solution, the dual-screw jack achieves a significant improvement in stability and load-bearing capacity. The two opposing scissor arm assemblies on the top of the base provide excellent support, ensuring the stability of the entire device during operation. Simultaneously, the first and second screws allow the lifting platform to rise and fall smoothly under the action of the drive motor, further improving load-bearing capacity and operating efficiency. This design not only solves the instability shortcomings of traditional single-screw jacking platforms but also maintains the advantages of compact structure and ease of maintenance. In addition, the dual lead screw configuration can improve the stability of the elevator and provide a certain margin of error. When one lead screw fails, the other lead screw can still support the normal operation of the equipment.

[0007] Preferably, the first lead screw and the second lead screw are arranged in parallel.

[0008] By adopting the above technical solution, the parallel arrangement of the two lead screws ensures the stability of the elevator during lifting or lowering, avoiding instability caused by lead screw tilting and improving the safety and reliability of the equipment. At the same time, the parallel arrangement of the two lead screws can distribute the load more evenly, reducing the stress on individual lead screws and extending their service life.

[0009] Preferably, a connecting shaft is provided between the first scissor arm and the second scissor arm. The connecting shaft includes a hinge end and a fixed end, and the first scissor arm and the second scissor arm are hinged together through the hinge end.

[0010] By adopting the above technical solution, this dual-screw scissor lift enhances the overall rigidity and stability of the scissor arm assembly by setting a connecting shaft between the first and second scissor arms, avoiding the shaking and instability that occur in traditional single-screw scissor lift platforms during long-term use. The design of the connecting shaft makes the scissor arm assembly move more coordinatedly during operation, improving the reliability and safety of the lifting platform.

[0011] Preferably, the drive frame is fixedly connected to the fixed end.

[0012] By adopting the above technical solution, the drive frame is fixedly connected to the fixed end, making the drive components more stable and reliable. This avoids equipment instability caused by loose connections, improving the overall stability and safety of the lifting platform. At the same time, this connection method simplifies the installation and maintenance process, reducing maintenance costs.

[0013] Preferably, each of the first lead screw and the second lead screw is provided with a drive seat, and each of the two drive seats is connected to a set of lifting arm assemblies. Both sets of lifting arm assemblies include a first lifting arm and a second lifting arm arranged in a scissor shape.

[0014] By adopting the above technical solution, a drive seat is installed on each of the first and second lead screws. The two drive seats are respectively connected to a set of lifting arm assemblies. Each set of lifting arm assemblies includes a first lifting arm and a second lifting arm arranged in a scissor shape. This design makes the lifting platform more stable during lifting, avoiding the swaying problem caused by a single force point in traditional single-screw lifting platforms, thus improving work safety. At the same time, the multi-point support design also enhances the load-bearing capacity of the entire system, enabling it to adapt to heavier load requirements.

[0015] Preferably, the ends of the first and second lifting arms away from the scissor arm assembly are hinged to the drive seat.

[0016] By adopting the above technical solution, the ends of the first and second lifting arms away from the scissor arm assembly are hinged to the drive seat, which can ensure the stability and reliability of the lifting process, avoid instability caused by single-point force, and improve the overall working efficiency and safety of the lifting platform.

[0017] Preferably, a first hinged long shaft is fixedly provided at one end of each of the two first scissor arms near the drive seat, and a second hinged long shaft is fixedly provided at one end of each of the two second scissor arms near the drive seat. The ends of the first and second lifting arms away from the drive seat are hinged to the first and second hinged long shafts.

[0018] By adopting the above technical solution, the dual screw jack is equipped with a first hinged long shaft and a second hinged long shaft at the ends of the first and second scissor arms near the drive seat, respectively. The ends of the first and second lifting arms away from the drive seat are hinged to these hinged long shafts, which effectively improves the overall stability and reliability of the jack. Specifically, this design makes the connection between the scissor arm assembly and the lifting arm assembly more secure, reducing instability caused by loose components and improving the safety and service life of the equipment. At the same time, this connection method simplifies the installation and maintenance process and reduces maintenance costs.

[0019] Preferably, the drive motor is connected to the first lead screw and the second lead screw via a gear set.

[0020] By adopting the above technical solution, the transmission between the drive motor and the first and second lead screws is more stable and reliable, ensuring the smoothness and safety of the lifting platform during operation. At the same time, the gear transmission method improves transmission efficiency, reduces energy loss, and extends the service life of the equipment.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. By setting up a double screw structure, the stability of the lifting platform is significantly enhanced, avoiding the tilting or swaying phenomenon that is prone to occur in traditional single screw lifting platforms when the load is large or the lifting height is high, thus improving the safety and reliability of use.

[0023] 2. The articulated structure design of the scissor arm assembly and the lifting platform makes the platform more stable during the lifting process, reduces vibration and impact, and improves operational comfort and safety. Attached Figure Description

[0024] Figure 1 This is a front view of an embodiment of this application;

[0025] Figure 2 This is a right view of an embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the specific structure of the scissor arm assembly and the lifting arm assembly.

[0027] Explanation of reference numerals in the attached drawings: 1. Lifting platform; 2. Base; 31. First scissor arm; 32. Second scissor arm; 4. Connecting shaft; 41. Fixed end; 42. Hinge end; 51. First lifting arm; 52. Second lifting arm; 61. First hinged long shaft; 62. Second hinged long shaft; 7. Drive motor; 71. First lead screw; 72. Second lead screw; 73. Drive frame; 74. Drive seat; 8. Gear set; 9. Hinge seat. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0029] The inventors of this application discovered that although there are many types of lifting platforms on the market, traditional single-screw lifting platforms have obvious shortcomings in stability. Therefore, this application mainly adopts a double-screw design, which significantly improves the stability and load-bearing capacity of the lifting platform. The following is a further detailed description of this application.

[0030] This application discloses a double screw jack, including a base 2. Two sets of scissor arm assemblies are oppositely arranged on the top of the base 2. Each set of scissor arm assemblies includes a first scissor arm 31 and a second scissor arm 32 hinged in a scissor shape. The bottoms of the first scissor arm 31 and the second scissor arm 32 are hinged to the base 2 via hinge seats 9. The tops of the first scissor arm 31 and the second scissor arm 32 are hinged to a lifting platform 1 via hinge seats 9. The scissor arm assemblies utilize their scissor-shaped structure to lift the lifting platform 1. A drive assembly is provided between the scissor arm components. The drive assembly includes a drive frame 73, on which a first lead screw 71, a second lead screw 72, and a drive motor 7 are rotatably mounted. The drive motor 7 is connected to the first lead screw 71 and the second lead screw 72 via a gear set 8. The gear set 8 is conventional, enabling the drive motor 7 to simultaneously drive both lead screws to rotate. This double-lead screw design significantly improves the stability and load-bearing capacity of the lifting platform, solving the stability problem inherent in traditional single-lead screw lifting platforms. To ensure synchronous operation of the two lead screws and prevent platform tilting due to asynchrony, the first lead screw 71 and the second lead screw 72 are arranged in parallel. The diameters of the first lead screw 71 and the second lead screw 72 can be selected according to load-bearing requirements.

[0031] A connecting shaft 4 is provided between the first scissor arm 31 and the second scissor arm 32. The connecting shaft 4 includes a hinged end 42 and a fixed end 41. The first scissor arm 31 and the second scissor arm 32 are hinged together through the hinged end 42. The drive frame 73 is fixedly connected to the fixed end 41. The connection shaft 4 enables the drive frame 73 to move up and down in sync with the movement of the first scissor arm 31 and the second scissor arm 32. Each of the first lead screw 71 and the second lead screw 72 is provided with a drive seat 74. The drive seat 74 is threadedly connected to the first lead screw 71 and the second lead screw 72 through a threaded block. Each of the two drive seats 74 is connected to a set of lifting arm assemblies. Both sets of lifting arm assemblies include a first lifting arm 51 and a second lifting arm 52 arranged in a scissor shape. The ends of the first lifting arm 51 and the second lifting arm 52 away from the scissor arm assembly are hinged to the drive seat 74. The two sets of lifting arm assemblies, drive base 74, first lead screw 71, second lead screw 72, and drive motor 7 can all move up and down in tandem with the movement of the first scissor arm 31 and the second scissor arm 32. A first hinge shaft 61 is fixedly mounted on one end of each of the two first scissor arms 31 near the drive base 74, and a second hinge shaft 62 is fixedly mounted on one end of each of the two second scissor arms 32 near the drive base 74. The ends of the first lifting arm 51 and the second lifting arm 52 away from the drive base 74 are hinged to the first hinge shaft 61 and the second hinge shaft 62. The arrangement of the first hinge shaft 61 and the second hinge shaft 62 connects the first lifting arm 51 and the second lifting arm 52 with the first scissor arm 31 and the second scissor arm 32 into a single unit, allowing them to move synchronously to complete the lifting motion.

[0032] The implementation principle of this application embodiment is as follows: When operating this product in actual use, when it is necessary to lift the lifting platform 1, the drive motor 7 is started, the drive motor 7 rotates, and the gear set 8 transmits the rotational force of the drive motor 7 evenly to the first lead screw 71 and the second lead screw 72. The first lead screw 71 and the second lead screw 72 transmit evenly, moving the drive seat 74 from a position away from the drive motor 7 to a position closer to the drive motor 7. The first lifting arm 51 and the second lifting arm 52, which are wide and flat, move with the drive seat 74 and gradually become narrow and tall, thereby achieving the technical effect of increasing the height. During the lifting process, the first lifting arm 51 and the second lifting arm 52 lift the first scissor arm 31 and the second scissor arm 32 through the first hinge long shaft 61 and the second hinge long shaft 62, so that the first scissor arm 31 and the second scissor arm 32 lift synchronously. The first scissor arm 31 and the second scissor arm 32 then lift the lifting platform 1, thereby completing the lifting effect of the lifting platform 1. Conversely, the drive motor 7 rotates in the opposite direction to drive the lifting platform 1 to slowly descend. In the cooperation between the first lead screw 71 and the second lead screw 72 and the drive seat 74, the drive seat 74 can only be moved by rotating the first lead screw 71 and the second lead screw 72. Conversely, the drive seat 74 cannot drive the first lead screw 71 and the second lead screw 72 to rotate. Therefore, the reverse locking function can be realized, so that the lifting platform 1 can stop at any time during the lifting process and keep the position of the lifting platform 1 from falling.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A twin-rail elevator characterized by: The utility model provides a kind of lifting platform, including base (2), the top of the base (2) is provided with two groups of scissors arm assemblies oppositely, two groups of the scissors arm assemblies include first scissors single arm (31) and second scissors single arm (32) being hingedly arranged in scissors, the bottom of the first scissors single arm (31) and second scissors single arm (32) is hingedly connected with the base (2) by hinged seat (9), the top of the first scissors single arm (31) and second scissors single arm (32) is hingedly arranged with jacking platform (1) by hinged seat (9), driving assembly is arranged between two groups of the scissors arm assemblies, and the driving assembly includes driving frame body (73), first screw rod (71), second screw rod (72) and driving motor (7) are rotationally arranged on the driving frame body (73).

2. A dual rod elevator as claimed in claim 1, characterized in that: The first screw rod (71) and the second screw rod (72) are arranged in parallel.

3. A dual rod elevator as in claim 1, wherein: Connecting shaft (4) is arranged between the first scissors single arm (31) and the second scissors single arm (32), and the connecting shaft (4) includes hinged end (42) and fixed end (41), and the first scissors single arm (31) and the second scissors single arm (32) are hingedly connected by the hinged end (42).

4. A dual rod elevator as claimed in claim 3, wherein: The driving frame body (73) is fixedly connected with the fixed end (41).

5. A twin rod elevator as claimed in claim 4, wherein: A driving seat (74) is arranged on the first screw rod (71) and the second screw rod (72), and one group of jacking arm assemblies is connected to the driving seat (74).

6. A twin rod elevator as claimed in claim 5, wherein: The first jacking single arm (51) and the second jacking single arm (52) are hingedly connected to the driving seat (74) away from the scissors arm assemblies.

7. A dual rod elevator as in claim 5, wherein: First hinged long shaft (61) is fixedly arranged on the end of the first scissors single arm (31) close to the driving seat (74), second hinged long shaft (62) is fixedly arranged on the end of the second scissors single arm (32) close to the driving seat (74), and the first jacking single arm (51) and the second jacking single arm (52) are hingedly connected to the first hinged long shaft (61) and the second hinged long shaft (62) away from the driving seat (74).

8. A dual rod elevator as in claim 1, wherein: The driving motor (7) is driven by gear set (8) between the first screw rod (71) and the second screw rod (72).

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