A high weight capacity lift chair

Abstract

This application belongs to the field of height-adjustable chair technology and discloses a high-load-bearing height-adjustable chair, including a seat plate, a top plate fixedly installed at one end of the bottom of the seat plate, a power box fixedly installed at the bottom of the top plate, a motor pad fixedly installed on one side of the inner wall of the power box, and a motor installed on the upper surface of the motor pad. In this application, by setting components such as worm gears and cylindrical racks, the worm gear drives the power box and the seat plate above to move up and down under the action of the worm. The worm gear transmission has a unique self-locking characteristic. When the worm stops rotating, the worm wheel can lock immediately to prevent the seat plate from accidentally sliding down due to external forces, which greatly improves the safety of the height-adjustable chair during use. At the same time, the meshing transmission process of the worm and worm wheel is smooth and has low noise. Compared with other transmission methods, it can effectively reduce the vibration transmitted to the seat plate, providing users with a quiet and stable riding experience and avoiding jamming or shaking.

Description

Technical Field

[0001] This utility model relates to the field of lifting chair technology, and in particular to a high load-bearing lifting chair. Background Technology

[0002] A height-adjustable chair mainly consists of a seat, backrest, frame, frame rocker arm, height adjustment and positioning device, and chair legs. The frame and chair legs are hinged together by the frame rocker arm; rocking the rocker arm raises and lowers the frame, thus raising and lowering the seat. A height adjustment and positioning device is also installed between the frame and chair legs. Depending on the type of height adjustment device used, height-adjustable chairs are divided into pneumatic height-adjustable chairs and hydraulic height-adjustable chairs. Pneumatic height-adjustable chairs are characterized by low cost, simple structure, and flexible operation, and occupy a larger market share. Hydraulic height-adjustable chairs, on the other hand, have a lower market share due to higher cost, more complex structure, and less sensitive height adjustment.

[0003] Chinese utility model patent CN217065792U discloses a highly reliable load-bearing height-adjustable office chair, including a lifting cylinder, a lifting shaft, and a seat base plate disposed on the end of the lifting shaft. It also includes a lubrication ring unit disposed on the outer ring side of the lifting shaft and sleeved with the lifting shaft; a primary buffer unit disposed on the upper end of the lubrication ring unit and supporting the seat base plate by lifting; and a secondary buffer unit disposed on the lifting cylinder and supporting the lubrication ring unit by lifting. This device, by incorporating the lubrication ring unit, primary buffer unit, and secondary buffer unit, achieves structural stability and high load-bearing capacity, and offers advantages such as good cushioning effect, excellent comfort, simple structure, convenient operation, and long service life.

[0004] Regarding the aforementioned technologies, the inventors believe that the following defects exist: existing height-adjustable chairs have poor load-bearing capacity during use, and are prone to damage when heavy forces are applied to the chair. The lifting equipment is also easily damaged by gravity, and the structural stability is insufficient. Under load, it may break or deform, causing the chair to tip over. Utility Model Content

[0005] To solve the above problems, this utility model provides a high load-bearing adjustable chair.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a high load-bearing lifting chair, including a seat plate, a top plate fixedly installed at one end of the bottom of the seat plate, a power box fixedly installed at the bottom of the top plate, a motor pad fixedly installed on one side of the inner wall of the power box, a motor installed on the upper surface of the motor pad, a worm gear fixedly installed on the output shaft on one side of the motor, a worm wheel installed through a thread on one side of the outer circumference of the worm gear, and the middle part of the worm wheel is rotatably installed in the middle of the inner wall of the power box through a rotating rod.

[0007] The worm gear is equipped with a cylindrical rack that meshes with the teeth on one side of its outer circumference. A fixed vertical tube is slidably sleeved at the bottom of the cylindrical rack. A fixed sleeve is fixedly installed at the bottom of the outer side of the fixed vertical tube. Five identical support legs are fixedly installed on the outer side of the fixed sleeve.

[0008] A support plate is fixedly installed in the middle of the outer side of the fixed vertical tube, and a hydraulic telescopic rod is fixedly installed in the middle of the upper surface of the support plate. The top of the hydraulic telescopic rod is fixedly installed at the end of the bottom of the seat plate.

[0009] By adopting the above technical solution, the height-adjustable chair has high stability on different ground surfaces and features strong load-bearing capacity and smooth lifting.

[0010] Furthermore, the backrest of the seat panel is provided with ventilation holes, the upper surface of the seat panel is provided with anti-slip grooves, a hand support frame is provided in the middle of the bottom of the seat panel, and an oval support plate is provided on the top of the hand support frame.

[0011] By adopting the above technical solution, the ventilation holes are evenly distributed in a honeycomb pattern, which can promote air circulation, prevent users from feeling stuffy on their backs when sitting for a long time, and provide comfortable support for users' hands.

[0012] Furthermore, a first support plate is rotatably mounted on the outer side of one end of the worm gear, and the top of the first support plate is fixedly mounted on the top of the inner wall of the power box. A second support plate is rotatably mounted on both ends of the rotating rod in the middle of the worm wheel, and the top of the second support plate is fixedly mounted on the top of the inner wall of the power box.

[0013] By adopting the above technical solution, the worm and worm wheel can rotate smoothly through the two support plates.

[0014] Furthermore, two identical limiting telescopic slide rods are fixedly installed at both ends of the upper surface of the support plate. The limiting telescopic slide rods are located on both sides of the hydraulic telescopic rod, and the top of the limiting telescopic slide rods is fixedly installed on both sides of the bottom end of the seat plate.

[0015] By adopting the above technical solution, the limiting telescopic slide rod plays a buffering and limiting role, which can limit the swing amplitude of the seat plate during the lifting and lowering process, ensuring the stability and safety of the lifting and lowering process, while assisting the hydraulic telescopic rod to share part of the load.

[0016] Furthermore, a top fixing plate is fixedly installed in the middle of the outer side of the cylindrical rack, and an electric telescopic rod is fixedly installed at one end of the bottom of the top fixing plate. The bottom of the electric telescopic rod is fixedly installed on the upper surface of the support plate, and the outer side of the bottom of the cylindrical rack is slidably inserted into the inner wall of the fixed vertical tube.

[0017] By adopting the above technical solution, the lifting position of the cylindrical rack can be adjusted according to actual usage needs, thereby enhancing the flexibility of height adjustment of the chair.

[0018] Furthermore, a first telescopic slide rod is fixedly installed at the bottom of the power box, and the bottom of the first telescopic slide rod is fixedly installed at the middle of the right end of the upper surface of the support plate. A movable ring is fixedly installed at the top of the left side of the power box, and the inner wall of the movable ring is slidably sleeved on the middle of the outer side of the cylindrical rack.

[0019] By adopting the above technical solution, the first telescopic slide rod can provide stable support and guidance when the power box rises and falls with the seat plate.

[0020] Furthermore, a distance is provided between the top fixed plate and the moving ring, with the left side of the top fixed plate away from the right side of the hydraulic telescopic rod.

[0021] By adopting the above technical solution, the movement of the moving ring is prevented from interfering with the top fixed plate during movement, mutual interference between components is avoided, the internal spatial structure of the lifting chair is optimized, the force on each component is more balanced, and the overall stability and load-bearing capacity of the lifting chair are further improved.

[0022] In summary, this utility model has the following beneficial effects:

[0023] 1. In this application, by setting components such as worm gears and cylindrical racks, the worm gear drives the power box and the seat plate above it to move up and down under the action of the worm. The worm gear transmission has a unique self-locking characteristic. When the worm stops rotating, the worm wheel can lock immediately to prevent the seat plate from accidentally sliding down due to external force, which greatly improves the safety of the height-adjustable chair during use. At the same time, the meshing transmission process of the worm and worm wheel is smooth and has low noise. Compared with other transmission methods, it can effectively reduce the vibration transmitted to the seat plate, providing users with a quiet and stable riding experience and avoiding jamming or shaking.

[0024] 2. In this application, by setting an adjustable cylindrical rack, the lifting position of the cylindrical rack can be adjusted according to actual usage needs, thereby enhancing the flexibility of the height adjustment of the lifting chair and enabling the lifting chair to adapt to more working environments. At the same time, by setting a hydraulic telescopic rod and a limit telescopic slide rod on the surface of the support plate, the lifting chair can be guaranteed to have a high load-bearing capacity. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall three-dimensional structure of an embodiment of the present invention;

[0026] Figure 2 This is a cross-sectional structural diagram of the power box according to an embodiment of the present utility model;

[0027] Figure 3 This is an enlarged schematic diagram of the worm gear connection according to an embodiment of this utility model;

[0028] Figure 4 This is a side view of an embodiment of the present invention;

[0029] Figure 5 This is a front structural diagram of an embodiment of the present invention.

[0030] In the diagram: 1. Seat panel; 2. Hand support frame; 3. Hydraulic telescopic rod; 4. Limiting telescopic slide rod; 5. Support plate; 6. Support leg; 7. Fixed vertical tube; 8. First telescopic slide rod; 9. Power box; 10. Fixed sleeve; 11. Worm gear; 12. Worm; 13. Motor; 14. First support plate; 15. Second support plate; 16. Cylindrical rack; 17. Moving ring; 18. Top fixing plate; 19. Electric telescopic rod; 20. Top plate; 21. Motor pad. Detailed Implementation

[0031] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0032] like Figure 1-5 As shown in the embodiment of this application, a high-load-bearing adjustable chair is disclosed, including a seat plate 1. The backrest of the seat plate 1 is provided with ventilation holes, which are evenly distributed in a honeycomb pattern to promote air circulation and prevent the user's back from getting stuffy when sitting for a long time. The upper surface of the seat plate 1 is provided with anti-slip grooves, which are crisscross striped structures with an anti-slip texture design to effectively prevent the user from sliding on the seat. A hand support frame 2 is provided at the middle of the bottom of the seat plate 1. An elliptical support plate is provided at the top of the hand support frame 2. The surface of the elliptical support plate is covered with a soft sponge pad and wrapped with breathable leather to provide comfortable support for the user's hands.

[0033] A top plate 20 is fixedly installed at one end of the bottom of the seat plate 1. A power box 9 is fixedly installed at the bottom of the top plate 20. A first telescopic slide rod 8 is fixedly installed at the bottom of the power box 9, which can provide stable support and guidance when the power box 9 rises and falls with the seat plate 1. The bottom of the first telescopic slide rod 8 is fixedly installed at the middle of the right end of the upper surface of the support plate 5 to ensure that the power box 9 will not tilt during the rising and falling process. A moving ring 17 is fixedly installed on the top of the left side of the power box 9. The inner wall of the moving ring 17 is slidably sleeved on the middle of the outer side of the cylindrical rack 16. When the power box 9 moves up and down with the worm gear 11, it slides on the surface of the cylindrical rack 16 through the moving ring 17 to increase its stability during movement.

[0034] A motor pad 21 is fixedly installed on one side of the inner wall of the power box 9. The motor pad 21 adopts a composite structure of shock-absorbing rubber and metal plate, which can absorb the vibration generated by the motor 13 during operation and reduce noise. The motor 13 is installed on the upper surface of the motor pad 21. The motor 13 is a high-power servo motor with precise speed control and strong torque output capability, which can meet the high load-bearing operation requirements of the lifting chair. A worm gear 12 is fixedly installed on the output shaft on one side of the motor 13. A first support plate 14 is rotatably installed on the outer side of one end of the worm gear 12. The first support plate 14 provides stable support for the worm gear 12 and restricts its axial movement. The top of the first support plate 14 is fixedly installed on the top of the inner wall of the power box 9. A second support plate 15 is rotatably installed on both ends of the rotating rod in the middle of the worm wheel 11. The top of the second support plate 15 is fixedly installed on the top of the inner wall of the power box 9. With the cooperation of high-precision bearings, the worm wheel 11 is ensured to rotate flexibly and stably, reducing the shaking during the transmission process.

[0035] The worm gear 12 is connected to a worm wheel 11 via a threaded drive on one side of its outer circumference. The middle part of the worm wheel 11 is rotatably mounted on the middle of the inner wall of the power box 9 via a rotating rod.

[0036] A worm gear 11 is fitted with a cylindrical rack 16 via teeth on one side of its outer circumference. A top fixing plate 18 is fixedly mounted on the middle of the outer side of the cylindrical rack 16, capable of withstanding significant tensile and compressive forces. An electric telescopic rod 19 is fixedly mounted on one end of the bottom of the top fixing plate 18. When the electric telescopic rod 19 extends or retracts, it changes the length of the cylindrical rack 16 extending beyond the fixed vertical tube 7. This allows for adjustment of the lifting position of the cylindrical rack 16 according to actual usage needs, enhancing the flexibility of the height adjustment of the chair. The bottom of the electric telescopic rod 19 is fixedly mounted on the upper surface of the support plate 5. The outer side of the bottom of the cylindrical rack 16 is slidably inserted into the inner wall of the fixed vertical tube 7, with a clearance between the two. Through precise design, the cylindrical rack 16 can be smoothly slid while preventing it from shifting under force. The bottom of the cylindrical rack 16 is slidably sleeved with a fixed vertical tube 7. A fixed sleeve 10 is fixedly installed on the bottom of the outer side of the fixed vertical tube 7. Five sets of identical support legs 6 are fixedly installed on the outer side of the fixed sleeve 10. A distance is set between the top fixed plate 18 and the moving ring 17 to prevent the moving ring 17 from interfering with the top fixed plate 18 during movement. The left side of the top fixed plate 18 is away from the right side of the hydraulic telescopic rod 3 to avoid mutual interference between the components. The internal spatial structure of the lifting chair is optimized, so that the force on each component is more balanced, and the overall stability and load-bearing capacity of the lifting chair are further improved.

[0037] A support plate 5 is fixedly installed in the middle of the outer side of the fixed vertical tube 7. Two identical limiting telescopic slide rods 4 are fixedly installed at both ends of the upper surface of the support plate 5. The limiting telescopic slide rods 4 are sleeve-type structures with springs and limiting pins inside. They can extend and retract within a certain range, playing a role in buffering and limiting. The limiting telescopic slide rods 4 are located on both sides of the hydraulic telescopic rod 3. The top of the limiting telescopic slide rods 4 is fixedly installed on both sides of the bottom end of the seat plate 1. It can limit the swing amplitude of the seat plate 1 during the lifting and lowering process, ensuring the stability and safety of the lifting and lowering process. At the same time, it assists the hydraulic telescopic rod 3 in sharing part of the load. Under the action of the limiting telescopic slide rods 4, it can have a high load-bearing capacity.

[0038] A hydraulic telescopic rod 3 is fixedly installed in the middle of the upper surface of the support plate 5. The hydraulic telescopic rod 3 is a double-acting hydraulic cylinder with strong load-bearing capacity and smooth lifting. The top of the hydraulic telescopic rod 3 is fixedly installed at the bottom end of the seat plate 1.

[0039] The operating principle of the high-load-bearing adjustable chair in this embodiment is as follows: When the height of the seat plate 1 needs to be adjusted, the motor 13 is started. The output shaft of the motor 13 drives the worm gear 12 to rotate. Since the worm gear 12 and the worm wheel 11 are connected by a threaded transmission, the rotation of the worm gear 12 will cause the worm wheel 11 to rotate around the rotating rod in the middle. The teeth on the outer circumference of the worm wheel 11 mesh with the cylindrical rack 16. The rotation of the worm wheel 11 drives the cylindrical rack 16 to slide up and down in the fixed vertical tube 7, thereby realizing the initial adjustment of the height of the seat plate 1.

[0040] During the lifting and lowering of the seat plate 1 driven by the cylindrical rack 16, the hydraulic telescopic rod 3 plays an important supporting role. The hydraulic telescopic rod 3 can automatically adjust the internal hydraulic pressure according to the weight borne by the seat plate 1, ensuring that the seat plate 1 remains stable during the lifting and lowering process and can withstand a large load. At the same time, the limiting telescopic slide rod 4 on the support plate 5 guides and limits the seat plate 1, preventing the seat plate 1 from deviating during the lifting and lowering process, further improving the stability and safety of the lifting and lowering.

[0041] The top fixing plate 18 on the outer side of the cylindrical rack 16 is connected to the electric telescopic rod 19, which can finely adjust the height of the seat plate 1. When precise adjustment of the height of the seat plate 1 is required, the electric telescopic rod 19 is activated. The extension and retraction of the electric telescopic rod 19 can drive the top fixing plate 18, thereby finely adjusting the position of the cylindrical rack 16 and achieving precise control of the height of the seat plate 1.

[0042] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A high-load-bearing adjustable chair, comprising a seat plate (1), characterized in that: A top plate (20) is fixedly installed at one end of the bottom of the seat plate (1). A power box (9) is fixedly installed at the bottom of the top plate (20). A motor pad (21) is fixedly installed on one side of the inner wall of the power box (9). A motor (13) is installed on the upper surface of the motor pad (21). A worm gear (12) is fixedly installed on the output shaft of one side of the motor (13). A worm wheel (11) is installed on the worm gear (12) through a thread on one side of the outer circumferential surface. The middle part of the worm wheel (11) is rotatably installed in the middle of the inner wall of the power box (9) through a rotating rod. The worm gear (11) is equipped with a cylindrical rack (16) through the teeth on one side of the outer circumference. The bottom of the cylindrical rack (16) is slidably sleeved with a fixed vertical tube (7). The bottom of the fixed vertical tube (7) is fixedly equipped with a fixed sleeve (10). Five sets of identical support legs (6) are fixedly equipped on the outside of the fixed sleeve (10). A support plate (5) is fixedly installed in the middle of the outer side of the fixed vertical tube (7), and a hydraulic telescopic rod (3) is fixedly installed in the middle of the upper surface of the support plate (5). The top of the hydraulic telescopic rod (3) is fixedly installed at the end of the bottom of the seat plate (1).

2. The high-load-bearing adjustable chair according to claim 1, characterized in that: The backrest of the seat panel (1) is provided with ventilation holes, the upper surface of the seat panel (1) is provided with anti-slip grooves, a hand support frame (2) is provided at the middle position of the bottom of the seat panel (1), and an elliptical support plate is provided at the top of the hand support frame (2).

3. A high-load-bearing adjustable chair according to claim 1, characterized in that: A first support plate (14) is rotatably provided on the outer side of one end of the worm (12), and the top of the first support plate (14) is fixedly provided on the top of the inner wall of the power box (9). A second support plate (15) is rotatably provided on both ends of the rotating rod in the middle of the worm wheel (11), and the top of the second support plate (15) is fixedly provided on the top of the inner wall of the power box (9).

4. A high-load-bearing adjustable chair according to claim 1, characterized in that: Two identical limiting telescopic slide rods (4) are fixedly installed at both ends of the upper surface of the support plate (5). The limiting telescopic slide rods (4) are located on both sides of the hydraulic telescopic rod (3), and the top of the limiting telescopic slide rods (4) is fixedly installed on both sides of the bottom end of the seat plate (1).

5. A high-load-bearing adjustable chair according to claim 1, characterized in that: A top fixing plate (18) is fixedly installed in the middle of the outer side of the cylindrical rack (16). An electric telescopic rod (19) is fixedly installed at one end of the bottom of the top fixing plate (18). The bottom of the electric telescopic rod (19) is fixedly installed on the upper surface of the support plate (5). The outer side of the bottom of the cylindrical rack (16) is slidably inserted into the inner wall of the fixed vertical tube (7).

6. A high-load-bearing adjustable chair according to claim 1, characterized in that: The bottom of the power box (9) is fixedly provided with a first telescopic slide rod (8), the bottom of the first telescopic slide rod (8) is fixedly provided at the middle of the right end of the upper surface of the support plate (5), and a moving ring (17) is fixedly provided at the top of the left side of the power box (9). The inner wall of the moving ring (17) is slidably sleeved on the middle of the outer side of the cylindrical rack (16).

7. A high-load-bearing adjustable chair according to claim 5, characterized in that: There is a distance between the top fixing plate (18) and the moving ring (17), and the left side of the top fixing plate (18) is away from the right side of the hydraulic telescopic rod (3).

Images