Elevator with slow descending function

Abstract

The invention relates to an elevator with a slow descending function, and relates to the field of elevators. The device comprises a device bottom frame, the device bottom frame comprises a bending bracket and a shear fork frame base, the shear fork frame base is horizontally arranged on the upper end face of the bending bracket and fixedly connected with the bending bracket, two sets of shear fork connecting rod mechanisms are installed on the two sides of the upper end face of the shear fork frame base, and two connecting ends are arranged at the lower ends of the shear fork connecting rod mechanisms. One connecting end is rotationally connected with the shear fork frame seat, and the other connecting end is in sliding connection with the shear fork frame seat. According to the elevator, the linkage frame and the safe slow descending assembly are installed on a traditional shear fork connecting rod mechanism, so that when the elevator needs to descend for use, synchronous movement can be achieved through cooperation of the linkage frame and the lower end of the shear fork connecting rod mechanism, and then the purpose of assisting transverse stretching is achieved through the safe slow descending assembly installed on the linkage frame; in this way, more stable descending can be achieved in the descending process, and a good slow descending function is achieved.

Description

Technical Field

[0001] This application relates to the technical field of elevators, and in particular to an elevator with a slow-descent function. Background Technology

[0002] In modern industrial production, construction, and logistics warehousing, elevators play an indispensable role as crucial vertical transportation equipment. They can quickly and efficiently lift personnel or goods to different heights, greatly improving work efficiency. Most elevators use scissor lift mechanisms to achieve their lifting function. A scissor lift mechanism mainly consists of multiple cross-hinged links, which are driven by a power unit (such as a hydraulic cylinder) to extend and retract, thereby raising and lowering the work platform.

[0003] However, existing scissor lifts based on scissor linkage mechanisms have several significant shortcomings. Firstly, their stability during descent is poor. Because the scissor linkage mechanism lacks effective auxiliary support and cushioning devices during retraction, the work platform often sways or even descends rapidly. This not only poses a significant safety hazard to operators on the platform but may also damage goods. For example, in some construction scenarios, if the swaying is too violent during descent, building materials on the platform may fall, injuring construction workers below.

[0004] Secondly, the existing scissor lift structure lacks stability. During long-term use, the scissor lift mechanism is susceptible to external impacts and its own weight, leading to problems such as member deformation and loosening of hinge points. This reduces the equipment's lifespan and increases maintenance costs. Furthermore, the lack of effective cushioning measures during descent results in significant impact forces, further exacerbating the risk of damage. Summary of the Invention

[0005] To increase the stability and safety of the elevator, this application provides an elevator with a slow-descent function.

[0006] The elevator with a slow-descent function provided in this application adopts the following technical solution: A lifting platform with a slow-descent function includes a base frame, which comprises a bending bracket and a scissor frame. The scissor frame is horizontally positioned on the upper surface of the bending bracket and is fixedly connected to it. Two sets of scissor linkage mechanisms are installed on both sides of the upper surface of the scissor frame. Each scissor linkage mechanism has two connecting ends at its lower end: one connecting end is rotatably connected to the scissor frame, and the other connecting end is slidably connected to it. Several sets of reinforcing linkages are also provided between the two sets of scissor linkage mechanisms. A buffer assembly is fitted and fixed on the outer surface of each reinforcing linkage. A working platform is also installed on the upper end of the scissor linkage mechanism. A linkage frame is also installed at one end of the scissor frame, which is slidably connected to the scissor frame. Two sets of safety slow-descent components connected to the other end of the scissor frame are also installed on the linkage frame. A hydraulic cylinder for adjusting the height of the scissor linkage mechanism is installed in the middle of the bending bracket.

[0007] By adopting the above technical solution, a base frame is designed for easy installation on mobile equipment, allowing the elevator to be flexibly used in different positions. The base frame is designed with a combination of a bent bracket and a scissor frame seat. During use, the bent bracket provides stable support for the scissor frame seat, which in turn provides the foundation for the installation and movement of the scissor linkage mechanism. The special connection method of the scissor linkage mechanism (rotational connection at one end and sliding connection at the other) enables the elevator to perform lifting functions. Reinforced connecting rods enhance the connection stability between the two sets of scissor linkage mechanisms, and the buffer component reduces the impact force generated during the movement of the scissor linkage mechanism when it is folded, achieving a smooth descent. The work platform provides working space for operators or goods. The linkage frame, in conjunction with the safety slow-descent component, assists in stretching the scissor linkage mechanism during descent and folding, ensuring a slow descent through elastic tension, thus improving safety during descent. The hydraulic cylinder allows for convenient adjustment of the height of the scissor linkage mechanism, enabling the elevator to lift and lower.

[0008] Optionally, the bending bracket includes a connecting central rod and a bending side plate supporting the scissor frame seat. The bending side plate is fixedly installed at both ends of the connecting central rod. The upper end face of the connecting central rod is provided with a cylinder seat for the hydraulic cylinder to be rotatably installed. The cylinder seat is fixedly connected to the connecting central rod.

[0009] By adopting the above technical solution, the structural design of the connecting rod and the bent side plate of the bending bracket enables the bending bracket to stably support the scissor lift frame. The cylinder base provides a rotating mounting position for the hydraulic cylinder, ensuring the stability and flexibility of the hydraulic cylinder during operation, allowing the hydraulic cylinder to accurately drive the scissor lift linkage mechanism for lifting and lowering movements.

[0010] Optionally, the scissor frame includes a main frame, a lower rotating lug, and a horizontal sliding frame. Two sets of the lower rotating lug and the horizontal sliding frame are provided, and the two sets of lower rotating lug and the two sets of horizontal sliding frames are respectively installed at the four corners of the upper surface of the main frame. The lower rotating lug and the horizontal sliding frame are fixedly connected to the main frame.

[0011] By adopting the above technical solution, the main frame of the scissor lift bracket serves as the main structure, with the lower rotating lug and the transverse sliding frame respectively installed at the four corners of the main frame, providing stable connection points for the lower end connection of the scissor lift linkage mechanism. The lower rotating lug enables the rotational connection of the scissor lift linkage mechanism, while the transverse sliding frame enables the sliding connection of the scissor lift linkage mechanism. This structural design allows the scissor lift linkage mechanism to perform smooth lifting and lowering movements.

[0012] Optionally, a guide groove is provided on one side of the main frame for sliding installation of the linkage frame, and a positioning seat plate is installed on the upper end surface of the main frame. The positioning seat plate is fixedly connected to the main frame, and a buffer strip is also fixedly installed on the side of the positioning seat plate facing the scissor linkage mechanism.

[0013] By adopting the above technical solution, the guide groove on the main frame provides guidance for the sliding of the linkage frame, ensuring the stability and accuracy of the linkage frame during the sliding process. The positioning seat plate can play a certain limiting role for the scissor linkage mechanism, while the buffer belt can reduce the collision between the linkage frame and the positioning seat plate during descent, while ensuring the buffering effect during descent and extending the service life of the equipment.

[0014] Optionally, the scissor lift mechanism consists of several sets of X-shaped supports. Each X-shaped support includes a first metal arm, a second metal arm, a central shaft, and an end shaft. The first and second metal arms are arranged crosswise. The two ends of the central shaft are respectively connected to the center of the first metal arm and the center of the second metal arm. Both the first and second metal arms are rotatably connected to the central shaft. The end shafts are rotatably installed at both ends of the first and second metal arms.

[0015] By adopting the above technical solution, the scissor lift mechanism consists of several sets of X-shaped supports connected from top to bottom, forming a foldable support structure. Metal arm one and metal arm two are connected by a central shaft and end shafts, forming a stable cross structure. This structure enables the scissor lift mechanism to maintain good stability and load-bearing capacity during lifting. Simultaneously, the rotatable connection between the metal arms and the central and end shafts ensures that the scissor lift mechanism can flexibly extend and retract. The two sets of scissor lift mechanisms are connected by reinforcing links to connect the corresponding central shafts at both ends, and also by reinforcing links to connect the corresponding end shafts at both ends. This allows for synchronous lifting and lowering of the two sets of scissor lift mechanisms, ensuring overall stability and safety.

[0016] Optionally, the buffer assembly includes a buffer strip and a connecting ring, wherein the connecting ring is configured in two sets, the buffer strip is evenly arranged between the two sets of connecting rings along the circumferential direction, and the two ends of the buffer strip are fixedly connected to the connecting ring.

[0017] By adopting the above technical solution, the structural design of the buffer strips and connecting rings of the buffer assembly ensures that the buffer assembly can stably wrap around the outer end of the reinforcing link. This prevents direct collision between the reinforcing links during descent and folding; instead, the buffer strips on the buffer assembly stack together, effectively absorbing and dispersing the impact force generated by the scissor linkage mechanism during operation. The buffer strips are evenly distributed circumferentially between the two sets of connecting rings, providing comprehensive cushioning and protecting the scissor linkage mechanism and other components from damage caused by excessive impact forces.

[0018] Optionally, the work platform includes a base plate, lower ear seats, a top sliding frame, and a protective frame. The lower ear seats and the top sliding frame are each set in two groups, and the two groups of lower ear seats and the two groups of top sliding frames are respectively located at the four corners of the lower end face of the base plate. The protective frame is fixedly installed on the upper end face of the base plate.

[0019] By adopting the above technical solution, the base plate of the work platform provides a support platform for operators or goods. The lower lug and the top sliding frame are respectively connected to the upper end of the scissor lift mechanism, ensuring a stable connection between the work platform and the scissor lift mechanism. The protective frame is fixedly installed on the upper surface of the base plate, providing safety protection for operators and preventing accidents such as falls during operation.

[0020] Optionally, the linkage frame includes a top frame, a connecting pipe, and a bent slide. The connecting pipe is fixedly installed on one side of the top frame, and the bent slide is arranged on both sides of the lower end face of the top frame. The head of the bent slide is fixedly connected to the top frame, and the bent slide is slidably installed in the guide groove.

[0021] By adopting the above technical solution, the structural design of the top frame of the linkage frame, the connecting pipe, and the bending slide allows the linkage frame to move laterally synchronously with the lower end of the metal boom two via the connecting pipe, enabling the linkage frame to move synchronously with the lower end of the metal boom two of the scissor frame. When the elevator needs to descend, the scissor linkage mechanism can fold synchronously, and then the end shaft on the lower end of the metal boom two can move outward along the transverse slide frame, thereby driving the bending slide to move outward synchronously. The bending slide is slidably installed in the guide groove, ensuring the stability and accuracy of the linkage frame during the sliding process. At the same time, the linkage frame can drive the safety slow-descent component to work, realizing the slow-descent function of the elevator.

[0022] Optionally, the safety descent assembly includes a positioning tube shell, a tension spring assembly, and an adjustment assembly. One end of the positioning tube shell is fixedly installed on the main frame. One end of the tension spring assembly is slidably installed in the positioning tube shell, and the other end of the tension spring assembly is sleeved and fixed on the bending slide. The adjustment assembly is installed on the positioning tube shell and is used to adjust the position of the tension spring assembly in the positioning tube shell.

[0023] By adopting the above technical solution, the positioning tube housing of the safety descent component provides space for the installation and movement of the tension spring assembly and the adjustment assembly. One end of the tension spring assembly is slidably installed in the positioning tube housing, and the other end is connected to the linkage frame. When the elevator descends, the tension spring assembly can generate tension, thus playing a role in slowing down the descent. The adjustment assembly can adjust the position of the tension spring assembly in the positioning tube housing, thereby adjusting the descent force to adapt to different working requirements. Furthermore, after the descent is complete, the tension spring assembly can be moved to the outermost end of the positioning tube housing, thus avoiding fatigue caused by long-term stress on the tension spring when not in use.

[0024] Optionally, the positioning tube shell is fixedly installed with an upper fixing plate and a lower fixing plate connected to the main frame, and a guide slide is integrally formed on the inner side of the positioning tube shell. The tension spring assembly includes a movable block, a slow-descent tension spring, and a connecting shell connected to the bending slide. The movable block and the connecting shell are fixedly installed at both ends of the slow-descent tension spring. A matching groove corresponding to the guide slide is opened on the outer side of the movable block, and a threaded hole is opened at the center of the movable block. The adjustment assembly includes a drive motor and a drive screw that mates with the threaded hole. The drive motor is fixedly installed on the outer side of the positioning tube shell, and a drive gear is fixedly installed at the output end of the drive motor. The drive screw is rotatably installed in the positioning tube shell, and a driven gear that meshes with the drive gear is sleeved and fixed at one end of the drive screw.

[0025] By adopting the above technical solution, the upper and lower fixing plates on the positioning tube shell ensure a firm connection between the positioning tube shell and the main frame. The guide slide bar cooperates with the matching groove on the movable block to ensure the sliding stability of the movable block in the positioning tube shell. The drive motor drives the drive screw to rotate through the drive gear and the driven gear. The drive screw cooperates with the threaded hole on the movable block to achieve precise adjustment of the position of the movable block, thereby accurately controlling the extension length of the tension spring assembly and adjusting the force of the slow descent.

[0026] In summary, this application includes at least one of the following beneficial technical effects: The lifting platform of this application, by installing a linkage frame and a safety deceleration component on a traditional scissor lift mechanism, allows for synchronous movement between the linkage frame and the lower end of the scissor lift mechanism when descent is required. The safety deceleration component installed on the linkage frame then assists in lateral stretching, resulting in a more stable descent and improved safety during descent. Simultaneously, the addition of reinforcing links and buffer components enhances the structural stability and cushioning effect of the lifting platform, reducing the risk of damage during descent. Multiple components work together to achieve effective and safe deceleration. The protective frame of the work platform provides safety for operators, improving their work safety. Furthermore, the adjustability of the safety deceleration component allows the lifting platform to adapt to different work requirements, exhibiting strong versatility and practicality. Attached Figure Description

[0027] Figure 1 This is a perspective view of the overall structure in the embodiments of this application.

[0028] Figure 2 yes Figure 1 Front view of the device shown.

[0029] Figure 3 This is a perspective view of the equipment base frame in an embodiment of this application.

[0030] Figure 4 yes Figure 3 Top view of the device shown.

[0031] Figure 5 This is a perspective view of the buffer component in the embodiments of this application.

[0032] Figure 6 This is a perspective view of the linkage frame in the embodiments of this application.

[0033] Figure 7 yes Figure 6 Front view of the device shown.

[0034] Figure 8 This is a perspective view of the scissor linkage mechanism, reinforcing link, and buffer assembly in the embodiments of this application.

[0035] Figure 9 yes Figure 8 Side view of the device shown.

[0036] Figure 10 This is a perspective view of the safety descent component in the embodiments of this application.

[0037] Figure 11 yes Figure 10A schematic diagram of the exploded structure of the device shown.

[0038] Figure 12 This is a perspective view of the safety descent component and adjustment component working together in the embodiments of this application.

[0039] Figure 13 This is a perspective view of the tension spring assembly in the embodiments of this application.

[0040] Explanation of reference numerals in the attached drawings: 1. Equipment base frame; 10. Hydraulic cylinder; 11. Bending bracket; 111. Connecting central rod; 112. Bending side plate; 113. Cylinder seat; 12. Scissor frame seat; 121. Main frame; 122. Lower rotating ear; 123. Transverse sliding frame; 124. Guide groove; 125. Positioning seat plate; 126. Buffer strip; 2. Scissor linkage mechanism; 21. Metal arm one; 22. Metal arm two; 23. Central shaft; 24. End shaft; 3. Reinforcing connecting rod; 4. Buffer assembly; 41. Buffer strip; 42. Connecting ring; 5. Working platform; 51. Base plate; 52. Lower ear seat; 53. Top slide frame; 54. Protective frame; 6. Linkage frame; 61. Top frame; 62. Connecting pipe; 63. Bending slide frame; 7. Safety slow descent assembly; 71. Positioning tube shell; 711. Upper fixing plate; 712. Lower fixing plate; 713. Guide slide bar; 72. Tension spring assembly; 721. Movable block; 722. Slow descent tension spring; 723. Connecting shell; 724. Matching slide groove; 725. Threaded hole; 73. Adjustment assembly; 731. Drive motor; 732. Drive screw. Detailed Implementation

[0041] The present application will be further described in detail below with reference to the accompanying drawings.

[0042] This application discloses an elevator with a slow-descent function. (Refer to...) Figure 1 , Figure 2 , Figure 3 and Figure 4A lifting platform with a slow-descent function includes a base frame 1. The base frame 1 includes a bending bracket 11 and a scissor frame seat 12. The scissor frame seat 12 is horizontally disposed on the upper end face of the bending bracket 11 and is fixedly connected to the bending bracket 11. Two sets of scissor linkage mechanisms 2 are installed on both sides of the upper end face of the scissor frame seat 12. The lower end of the scissor linkage mechanism 2 is provided with two connecting ends. One connecting end is rotatably connected to the scissor frame seat 12, and the other connecting end is slidably connected to the scissor frame seat 12. Several sets of reinforcing links 3 are also provided between the two sets of scissor lift linkage mechanisms 2. A buffer assembly 4 is fixedly fitted onto the outer surface of the reinforcing link 3. A working platform 5 is also installed at the upper end of the scissor lift linkage mechanism 2. A linkage frame 6 is also installed at one end of the scissor lift frame 12. The linkage frame 6 is slidably connected to the scissor lift frame 12, and two sets of safety slow-descent components 7 connected to the other end of the scissor lift frame 12 are also installed on the linkage frame 6. A hydraulic cylinder 10 for adjusting the height of the scissor lift linkage mechanism 2 is installed in the middle of the bending bracket 11. The equipment base frame 1 is designed for easy fixed installation on the mobile device, allowing the lifting machine to be used flexibly in different positions by driving the mobile device. Furthermore, by designing the equipment base frame 1 as a structure where the bending bracket 11 and the scissor lift frame 12 cooperate, the bending bracket 11 provides stable support for the scissor lift frame 12 during use, and the scissor lift frame 12 provides the foundation for the installation and movement of the scissor lift linkage mechanism 2. The special connection method of the scissor lift mechanism 2 (rotatable connection at one end and sliding connection at the other end) enables the lift to achieve lifting function. The reinforcing link 3 enhances the connection stability between the two sets of scissor lift mechanisms 2, and the buffer component 4 reduces the impact force generated during the movement of the scissor lift mechanism 2 when it is folded, ensuring a smooth descent. The work platform 5 provides working space for operators or goods. The linkage frame 6, in conjunction with the safety slow-descent component 7, can assist in stretching the scissor lift mechanism 2 during its folding and descent, ensuring a slow descent through elastic tension, thus improving safety during the descent process. The hydraulic cylinder 10 allows for convenient adjustment of the height of the scissor lift mechanism 2, enabling the lifting operation of the lift.

[0043] Reference Figure 3 and Figure 4The bending bracket 11 includes a connecting central rod 111 and bending side plates 112 supporting the scissor frame seat 12. The bending side plates 112 are fixedly installed at both ends of the connecting central rod 111. The upper end face of the connecting central rod 111 is provided with a cylinder seat 113 for the hydraulic cylinder 10 to be rotatably mounted. The cylinder seat 113 is fixedly connected to the connecting central rod 111. The structural design of the connecting central rod 111 and the bending side plates 112 of the bending bracket 11 enables the bending bracket 11 to stably support the scissor frame seat 12. The setting of the cylinder seat 113 provides a rotatable mounting position for the hydraulic cylinder 10, ensuring the stability and flexibility of the hydraulic cylinder 10 during operation, so that the hydraulic cylinder 10 can accurately drive the scissor linkage mechanism 2 to perform lifting and lowering movements. The scissor lift frame 12 includes a main frame 121, lower rotating ears 122, and a transverse sliding frame 123. Two sets of lower rotating ears 122 and two sets of transverse sliding frames 123 are provided, and are respectively installed at the four corners of the upper surface of the main frame 121. Both the lower rotating ears 122 and the transverse sliding frames 123 are fixedly connected to the main frame 121. The main frame 121 of the scissor lift frame 12 serves as the main structure, with the lower rotating ears 122 and transverse sliding frames 123 respectively installed at the four corners, providing stable connection points for the lower end connection of the scissor lift linkage mechanism 2. The lower rotating ears 122 enable the rotational connection of the scissor lift linkage mechanism 2, and the transverse sliding frames 123 enable the sliding connection of the scissor lift linkage mechanism 2. This structural design allows the scissor lift linkage mechanism 2 to perform smooth lifting and lowering movements. A guide groove 124 is provided on one side of the main frame 121 for the sliding installation of the linkage frame 6. A positioning seat plate 125 is installed on the upper end face of the main frame 121. The positioning seat plate 125 is fixedly connected to the main frame 121, and a buffer belt 126 is also fixedly installed on the side of the positioning seat plate 125 facing the scissor linkage mechanism 2. The guide groove 124 on the main frame 121 provides guidance for the sliding of the linkage frame 6, ensuring the stability and accuracy of the linkage frame 6 during the sliding process. The positioning seat plate 125 can limit the movement of the scissor linkage mechanism 2, while the buffer belt 126 can reduce the collision between the linkage frame 6 and the positioning seat plate 125 during descent, while ensuring the cushioning effect during descent and extending the service life of the equipment.

[0044] Reference Figure 8 and Figure 9The scissor lift mechanism 2 consists of several sets of X-shaped supports. Each X-shaped support includes a first metal arm 21, a second metal arm 22, a central shaft 23, and an end shaft 24. The first metal arm 21 and the second metal arm 22 are arranged crosswise. The two ends of the central shaft 23 are connected to the centers of the first metal arm 21 and the second metal arm 22, respectively, and are rotatably connected to both the first metal arm 21 and the second metal arm 22. The end shaft 24 is rotatably mounted at both ends of the first metal arm 21 and the second metal arm 22. The scissor lift mechanism 2, composed of several sets of X-shaped supports interconnected from top to bottom, forms a foldable support structure. The first metal arm 21 and the second metal arm 22 are connected via the central shaft 23 and the end shaft 24, forming a stable cross structure. This structure enables the scissor lift mechanism 2 to maintain good stability and load-bearing capacity during lifting. At the same time, the rotatable connection between the metal arm and the central shaft 23 and the end shaft 24 ensures that the scissor lift mechanism 2 can be flexibly extended and retracted. The two sets of scissor lift mechanisms 2 are connected by a reinforcing link 3 to connect the corresponding central shafts 23 at both ends, and the reinforcing link 3 also connects the corresponding end shafts 24 at both ends. In this way, the two sets of scissor lift mechanisms 2 can be lifted and lowered synchronously, ensuring the overall stability and safety of use.

[0045] Reference Figure 5 and Figure 8 The buffer assembly 4 includes buffer strips 41 and connecting rings 42. Two sets of connecting rings 42 are provided, and the buffer strips 41 are evenly distributed circumferentially between the two sets of connecting rings 42, with both ends of the buffer strips 41 fixedly connected to the connecting rings 42. The structural design of the buffer strips 41 and connecting rings 42 in the buffer assembly 4 ensures that the buffer assembly 4 stably wraps around the outer end of the reinforcing link 3. This prevents direct collision between the reinforcing link 3 during descent and folding; instead, the buffer strips 41 on the buffer assembly 4 stack together, effectively absorbing and dispersing the impact force generated by the scissor linkage mechanism 2 during movement. The buffer strips 41, evenly distributed circumferentially between the two sets of connecting rings 42, provide comprehensive cushioning, protecting the scissor linkage mechanism 2 and other components from damage caused by excessive impact. The buffer strips 41 are made of rubber, possessing good elasticity and cushioning performance, effectively absorbing and dispersing impact force.

[0046] Reference Figure 1 and Figure 2The working platform 5 includes a base plate 51, lower lugs 52, a top sliding frame 53, and a protective frame 54. Two sets of lower lugs 52 and two sets of top sliding frames 53 are each located at the four corners of the lower end face of the base plate 51. The protective frame 54 is fixedly installed on the upper end face of the base plate 51. The base plate 51 of the working platform 5 provides a support platform for operators or goods. The lower lugs 52 and top sliding frames 53 are respectively connected to the upper end of the scissor lift mechanism 2, ensuring a stable connection between the working platform 5 and the scissor lift mechanism 2. The protective frame 54, fixedly installed on the upper end face of the base plate 51, provides safety protection for operators, preventing accidents such as falls during operation.

[0047] Reference Figure 6 and Figure 7 The linkage frame 6 includes a top frame 61, a connecting pipe 62, and a bent slide 63. The connecting pipe 62 is fixedly installed on one side of the top frame 61, and the bent slide 63 is located on both sides of the lower end face of the top frame 61. The head of the bent slide 63 is fixedly connected to the top frame 61, and the bent slide 63 is slidably installed in the guide groove 124. The structural design of the top frame 61, connecting pipe 62, and bent slide 63 of the linkage frame 6 allows the linkage frame 6 to move laterally synchronously with the lower end of the metal arm 22 22 via the connecting pipe 62. When the elevator needs to descend, the scissor linkage mechanism 2 can fold synchronously, and then the end shaft 24 on the lower end of the metal arm 22 can move outward along the transverse slide frame 123, thereby driving the bent slide 63 to move outward synchronously. The bending slide 63 is slidably installed in the guide groove 124, which ensures the stability and accuracy of the linkage frame 6 during the sliding process. At the same time, the linkage frame 6 can drive the safety slow descent component 7 to work, so as to realize the slow descent function of the elevator.

[0048] Reference Figure 10 , Figure 11 , Figure 12 and Figure 13The safety descent assembly 7 includes a positioning tube housing 71, a tension spring assembly 72, and an adjusting assembly 73. One end of the positioning tube housing 71 is fixedly mounted on the main frame 121. One end of the tension spring assembly 72 is slidably mounted in the positioning tube housing 71, and the other end of the tension spring assembly 72 is sleeved and fixed on the bent slide 63. The adjusting assembly 73 is mounted on the positioning tube housing 71 and is used to adjust the position of the tension spring assembly 72 in the positioning tube housing 71. The positioning tube housing 71 of the safety descent assembly 7 provides space for the installation and movement of the tension spring assembly 72 and the adjusting assembly 73. One end of the tension spring assembly 72 is slidably mounted in the positioning tube housing 71, and the other end is connected to the linkage frame 6. When the elevator descends, the tension spring assembly 72 can generate tension, thus playing a role in slowing down the descent. The adjustment component 73 can adjust the position of the tension spring assembly 72 in the positioning tube housing 71, thereby adjusting the descent force to adapt to different working requirements. After the descent is complete, the tension spring assembly 72 can be moved to the outermost end of the positioning tube housing 71, thus avoiding fatigue caused by long-term stress on the tension spring when not in use. An upper fixed plate 711 and a lower fixed plate 712 connected to the main frame 121 are fixedly installed on the positioning tube housing 71. A guide slide 713 is integrally formed on the inner side of the positioning tube housing 71. The tension spring assembly 72 includes a movable block 721, a descent tension spring 722, and a connecting shell 723 connected to the bending slide 63. The movable block 721 and the connecting shell 723 are fixedly installed at both ends of the descent tension spring 722. An opening opposite to the guide slide 713 is formed on the outer side of the movable block 721. The movable block 721 has a threaded hole 725 at its center, and the adjusting assembly 73 includes a drive motor 731 and a drive screw 732 that mates with the threaded hole 725. The drive motor 731 is fixedly mounted on the outer surface of the positioning tube housing 71, and a drive gear is fixedly mounted on the output end of the drive motor 731. The drive screw 732 is rotatably mounted in the positioning tube housing 71, and a driven gear that meshes with the drive gear is sleeved and fixed at one end of the drive screw 732. The upper fixing plate 711 and the lower fixing plate 712 on the positioning tube housing 71 ensure a firm connection between the positioning tube housing 71 and the main frame 121. The guide slide 713 mates with the sliding groove 724 on the movable block 721, ensuring the sliding stability of the movable block 721 in the positioning tube housing 71. The drive motor 731 drives the drive screw 732 to rotate through the drive gear and the driven gear. The drive screw 732 cooperates with the threaded hole 725 on the movable block 721 to achieve precise adjustment of the position of the movable block 721, thereby accurately controlling the extension length of the tension spring assembly 72 and adjusting the force of the slow descent.

[0049] The implementation principle of a lifting platform with a slow-descent function in this application embodiment is as follows: When it is necessary to raise the lifting platform, the hydraulic cylinder 10 is activated, the piston rod of the hydraulic cylinder 10 extends, and pushes the scissor linkage mechanism 2 to unfold, thereby raising the working platform 5. Simultaneously, the drive motor 731 is activated to drive the movable block 721 to move into the positioning tube shell 71, and then the slow-descent tension spring 722 assists in dragging the linkage frame 6 to move laterally, ensuring that the X-shaped bracket on the scissor linkage mechanism 2 can be raised more easily during the lifting process. After rising to a suitable height, the hydraulic cylinder 10 is stopped, and the drive motor 731 continues to drive the movable block 721 to move, ensuring that the slow-descent tension spring 722 is in a suitable tension state. In this way, even if the hydraulic cylinder 10 fails and loses support to the scissor linkage mechanism 2, the working platform 5 will not fall directly, but will descend slowly under the tension of the slow-descent tension spring 722, increasing the safety of equipment use.

[0050] When the lift needs to be lowered, the piston rod of the hydraulic cylinder 10 retracts, the scissor linkage mechanism 2 contracts, and the working platform 5 descends. During the descent, the tension of the tension spring assembly 72 acts as a slowing force, allowing the lift to descend slowly and improving safety. After fully descending, the drive motor 731 is started, which drives the drive screw 732 to rotate. The drive screw 732, through its engagement with the threaded hole 725 on the movable block 721, adjusts the position of the tension spring assembly 72 within the positioning tube housing 71, thereby releasing the corresponding tension from the tension spring assembly 72.

[0051] 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 lift with a slow-descent function, comprising a base frame (1), characterized in that: The equipment base frame (1) includes a bending bracket (11) and a scissor frame seat (12). The scissor frame seat (12) is horizontally arranged on the upper surface of the bending bracket (11) and is fixedly connected to the bending bracket (11). Two sets of scissor linkage mechanisms (2) are installed on both sides of the upper surface of the scissor frame seat (12). The lower end of the scissor linkage mechanism (2) is provided with two connecting ends. One connecting end is rotatably connected to the scissor frame seat (12), and the other connecting end is slidably connected to the scissor frame seat (12). A connection is also provided between the two sets of scissor linkage mechanisms (2). Several sets of reinforcing links (3) are provided. A buffer assembly (4) is fitted and fixed on the outer surface of the reinforcing link (3). A working platform (5) is also installed on the upper end of the scissor link mechanism (2). A linkage frame (6) is also installed on one end of the scissor frame seat (12). The linkage frame (6) is slidably connected to the scissor frame seat (12). Two sets of safety slow-descent components (7) connected to the other end of the scissor frame seat (12) are also installed on the linkage frame (6). A hydraulic cylinder (10) for adjusting the height of the scissor link mechanism (2) is installed in the middle of the bending bracket (11).

2. The elevator with a slow-descent function according to claim 1, characterized in that: The bending bracket (11) includes a connecting rod (111) and a bending side plate (112) supporting the scissor frame seat (12). The bending side plate (112) is fixedly installed at both ends of the connecting rod (111). The upper end face of the connecting rod (111) is provided with a cylinder seat (113) for the hydraulic cylinder (10) to be rotatably installed. The cylinder seat (113) is fixedly connected to the connecting rod (111).

3. The elevator with a slow-descent function according to claim 2, characterized in that: The scissor frame base (12) includes a main frame (121), a lower rotating ear (122), and a horizontal sliding frame (123). The lower rotating ear (122) and the horizontal sliding frame (123) are provided in two sets, and the two sets of lower rotating ears (122) and the two sets of horizontal sliding frames (123) are respectively installed at the four corners of the upper surface of the main frame (121). The lower rotating ear (122) and the horizontal sliding frame (123) are fixedly connected to the main frame (121).

4. The elevator with a slow-descent function according to claim 3, characterized in that: The main frame (121) has a guide groove (124) on one side for sliding installation of the linkage frame (6), and a positioning seat plate (125) is installed on the upper end face of the main frame (121). The positioning seat plate (125) is fixedly connected to the main frame (121), and a buffer belt (126) is also fixedly installed on the side of the positioning seat plate (125) facing the scissor linkage mechanism (2).

5. The elevator with a slow-descent function according to claim 4, characterized in that: The scissor linkage mechanism (2) is composed of several sets of X-shaped brackets. The X-shaped brackets include a metal arm one (21), a metal arm two (22), a central shaft (23), and an end shaft (24). The metal arm one (21) and the metal arm two (22) are arranged crosswise. The two ends of the central shaft (23) are respectively connected to the center of the metal arm one (21) and the center of the metal arm two (22). The metal arm one (21) and the metal arm two (22) are rotatably connected to the central shaft (23). The end shaft (24) is rotatably installed at both ends of the metal arm one (21) and the metal arm two (22).

6. The elevator with a slow-descent function according to claim 5, characterized in that: The buffer assembly (4) includes a buffer strip (41) and a connecting ring (42). The connecting ring (42) is set in two sets. The buffer strip (41) is evenly arranged between the two sets of connecting rings (42) along the circumferential direction, and the two ends of the buffer strip (41) are fixedly connected to the connecting ring (42).

7. A lift with a slow-descent function according to claim 6, characterized in that: The working platform (5) includes a base plate (51), a lower ear seat (52), a top sliding frame (53), and a protective frame (54). The lower ear seat (52) and the top sliding frame (53) are each set in two groups, and the two groups of lower ear seats (52) and the two groups of top sliding frames (53) are respectively located at the four corners of the lower end face of the base plate (51). The protective frame (54) is fixedly installed on the upper end face of the base plate (51).

8. The elevator with a slow-descent function according to claim 4, characterized in that: The linkage frame (6) includes a top frame (61), a connecting pipe (62), and a bending slide (63). The connecting pipe (62) is fixedly installed on one side of the top frame (61), and the bending slide (63) is arranged on both sides of the lower end face of the top frame (61). The head of the bending slide (63) is fixedly connected to the top frame (61), and the bending slide (63) is slidably installed in the guide groove (124).

9. A lift with a slow-descent function according to claim 8, characterized in that: The safety descent assembly (7) includes a positioning tube shell (71), a tension spring assembly (72), and an adjustment assembly (73). One end of the positioning tube shell (71) is fixedly installed on the main frame (121). One end of the tension spring assembly (72) is slidably installed in the positioning tube shell (71), and the other end of the tension spring assembly (72) is sleeved and fixed on the bending slide (63). The adjustment assembly (73) is installed on the positioning tube shell (71), and the adjustment assembly (73) is used to adjust the position of the tension spring assembly (72) in the positioning tube shell (71).

10. A lift with a slow-descent function according to claim 9, characterized in that: The positioning tube shell (71) is fixedly mounted with an upper fixing plate (711) and a lower fixing plate (712) connected to the main frame (121). A guide rail (713) is integrally formed on the inner side of the positioning tube shell (71). The tension spring assembly (72) includes a movable block (721), a slow-descent tension spring (722), and a connecting shell (723) connected to the bending slide (63). The movable block (721) and the connecting shell (723) are fixedly mounted at both ends of the slow-descent tension spring (722). The outer surface of the movable block (721) is provided with a guide rail (713). 3) A corresponding sliding groove (724) is provided, and a threaded hole (725) is provided at the center of the movable block (721). The adjustment component (73) includes a drive motor (731) and a drive screw (732) that cooperates with the threaded hole (725). The drive motor (731) is fixedly installed on the outer side of the positioning tube shell (71), and a drive gear is fixedly installed at the output end of the drive motor (731). The drive screw (732) is rotatably installed in the positioning tube shell (71), and a driven gear that meshes with the drive gear is sleeved and fixed at one end of the drive screw (732).

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