A lifting mechanism

Abstract

The application relates to the technical field of household products, in particular to a lifting mechanism which comprises a lifting assembly, a transmission assembly and an adjusting assembly, the transmission assembly is connected between the adjusting assembly and the lifting assembly, the lifting assembly comprises a first pipe body, a second pipe body and a screw structure, the second pipe body is slidingly arranged on the outer wall of the first pipe body, the screw structure is arranged in the first pipe body and is fixedly connected with the second pipe body, the adjusting assembly and the transmission assembly are matched to realize the axial expansion and contraction of the second pipe body on the first pipe body, after a user applies a rotating torque to a handle part, the rotating torque is converted into the axial displacement of the second pipe body through the transmission assembly, meanwhile, the first pipe body plays a restraining and guiding role on the second pipe body, and the application has the characteristics of stably realizing the lifting function.

Description

Technical Field

[0001] This application relates to the field of home furnishing technology, and in particular to a lifting mechanism. Background Technology

[0002] With the development of modern home life, people have higher and higher requirements for the functionality and convenience of furniture. The lifting function of small home furnishings has become an important requirement for improving space utilization and user experience.

[0003] In related technologies, there are already a variety of mature products with lifting functions on the market, such as height-adjustable desks and chairs. These products mainly use electric or manual lifting mechanisms, which achieve lifting through motors or pneumatic rods. The former has high adjustment precision, while the latter is more flexible and smooth to use.

[0004] Existing lifting mechanisms have the following problems: electric lifting mechanisms rely on external power sources, and the addition of motors and control systems makes the overall structure complex and costly. Pneumatic rods may experience air pressure leakage after long-term use, leading to lifting function failure. Summary of the Invention

[0005] To reliably achieve the lifting function, this application provides a lifting mechanism.

[0006] The lifting mechanism provided in this application adopts the following technical solution: A lifting mechanism includes a lifting component, a transmission component, and an adjustment component. The transmission component is connected between the adjustment component and the lifting component. The lifting component includes a first tube, a second tube, and a screw structure. The second tube is slidably disposed on the outer wall of the first tube. The screw structure is built into the first tube and fixedly connected to the second tube. The adjustment component and the transmission component cooperate to realize the axial extension and retraction of the second tube on the first tube.

[0007] By adopting the above scheme, the user manually inputs power to the adjustment component, which drives the screw structure to rotate through the transmission component, thereby causing the second tube to move axially relative to the first tube. The first tube then guides the lifting and lowering process of the second tube, achieving stable lifting and lowering adjustment.

[0008] Preferably, the screw structure includes a slider, a lead screw, and an outer rod body. The outer rod body completely covers the lead screw. The slider is rigidly connected to the outer rod body. The second tube body is fixed on the outer rod body. The slider slides along the length direction of the lead screw through geometric matching between its internal thread and the external thread of the lead screw, thereby driving the outer rod body and the second tube body to move up and down relative to the first tube body.

[0009] By adopting the above scheme, when the screw structure is working, the screw rotation drives the slider to move axially. The geometric matching of the threaded pair ensures the accuracy and self-locking of the transmission. The rigidly connected outer rod body transmits linear motion to the second tube body. At the same time, the outer rod body protects and constrains the screw, so that the second tube body can achieve stable extension and retraction on the outer wall of the first tube body, completing precise lifting and lowering actions.

[0010] Preferably, the adjustment assembly includes a handle, a connecting body, and a stud. The handle is fixedly connected to the connecting body, and the connecting body is rotatably connected to the transmission assembly via the stud.

[0011] By adopting the above solution, the user inputs rotational torque by holding the handle, which is transmitted to the stud through the rigidly connected connector, driving the transmission component to rotate, converting the circular motion into the precise angular displacement of the transmission component, and finally controlling the linear extension and retraction of the second tube, which is simple and convenient.

[0012] Preferably, a first insertion portion is provided at one end of the connector away from the stud, and a second insertion portion is provided at one end of the handle portion. The first insertion portion and the second insertion portion are interference-fitted to allow the handle portion to rotate and fold along the end of the connector.

[0013] By adopting the above solution, no fasteners are needed. The first and second plug-in parts form a rotating pair, allowing the handle to rotate around the end of the connector and fit snugly or flush with the connector, thereby saving space.

[0014] Preferably, the transmission assembly includes a transmission module, one end of which is fixed to the first tube body. The transmission module has a first gear and a second gear rotatably connected to the stud, and a third gear rotatably connected to the lead screw. The third gear meshes with the first gear and the second gear.

[0015] By adopting the above scheme, the torque amplification effect is achieved by utilizing a multi-stage gear meshing structure, while reducing the rotational speed, saving effort and increasing efficiency, thus improving transmission efficiency. The built-in gear set reduces the axial space occupied, making it suitable for scenarios requiring high-precision linear output, such as lifting mechanisms and precision instruments.

[0016] The rotation of the stud drives the first gear to rotate, which in turn drives the second gear to rotate in the opposite direction through tooth surface contact. The second gear meshes with the third gear, transmitting the rotational motion to the lead screw. At the same time, the torque is amplified by the reduction ratio of the gear pair. The speed is reduced by the difference in the number of teeth of the first and second gears. The third gear is directly connected to the lead screw to maintain synchronous speed. Finally, the circumferential input of the stud is converted into the precise axial displacement of the lead screw.

[0017] Preferably, the outer wall of the first tube is provided with a first plastic component and a second plastic component. When the second tube moves up and down on the first tube, the first plastic component abuts against the inner wall of the second tube, and the second plastic component abuts against the bottom of the second tube.

[0018] Only through the above solution can the first plastic component slide in contact with the inner wall of the second tube, reducing the verticality deviation of the lifting trajectory and reducing movement offset and swaying. The second plastic component absorbs impact energy through elastic deformation at the bottom of the second tube, reducing instability caused by vibration rebound, thus comprehensively improving lifting stability.

[0019] Preferably, the surface of the first plastic part is provided with anti-slip protrusions, the bottom of the second plastic part is provided with a boss, a first protrusion extends from the boss, the surface of the second plastic part is provided with a second protrusion, and the second tube body is provided with a plurality of grooves of appropriate size corresponding to the anti-slip protrusions, the first protrusion and the second protrusion, so as to realize the snap-fit ​​cooperation between the first tube body and the second tube body.

[0020] By adopting the above scheme, the unexpected sliding during the lifting and lowering of the second tube is further reduced, and the torsional strength between the second tube and the first tube is improved.

[0021] Preferably, the transmission assembly further includes a transmission rod, and the transmission module further includes a fourth gear. The fourth gear is built into the transmission module and rotatably connected to one end of the transmission rod. The fourth gear meshes with the first gear, the second gear, and the third gear. The other end of the transmission rod is rotatably connected to another set of the same lifting assembly.

[0022] By adopting the above scheme, the fourth gear and the other three sets of gears form a fully meshing transmission system, which distributes the input torque to the rod body of the transmission rod, thereby driving the two sets of lifting components at both ends of the transmission rod to lift synchronously.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. The user manually inputs power to the adjustment component, which drives the screw structure to rotate through the transmission component, thereby causing the second tube to move axially relative to the first tube. The first tube then guides the second tube during its lifting and lowering process, achieving stable lifting and lowering adjustment. 2. It reduces the verticality deviation of the lifting trajectory, reduces motion deviation and swaying, and reduces instability caused by vibration rebound, thus comprehensively improving lifting stability; 3. Improved transmission efficiency of the device, making it easier for customers to perform labor-saving and rapid lifting and lowering adjustments. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the overall structure of an embodiment of this application.

[0025] Figure 2 This is an exploded view of the lifting assembly according to an embodiment of this application.

[0026] Figure 3 This is a schematic diagram of the overall structure of the adjustment component according to an embodiment of this application.

[0027] Figure 4 This is a schematic diagram illustrating the cooperation relationship between the transmission component and the screw structure in an embodiment of this application.

[0028] Explanation of reference numerals in the attached drawings: 1. Lifting assembly; 11. First tube body; 111. First plastic part; 1111. Anti-slip protrusion; 112. Second plastic part; 1121. Boss; 1122. First protrusion; 1123. Second protrusion; 12. Second tube body; 121. Groove; 13. Screw structure; 131. Slider; 132. Lead screw; 133. Outer rod body; 2. Transmission assembly; 21. Transmission module; 22. Transmission rod; 221. Rod; 222. Connector; 3. Adjustment assembly; 31. Connector; 311. First insertion part; 32. Stud; 33. Handle part; 331. Second insertion part. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0030] This application discloses a lifting mechanism. (Refer to...) Figure 1-2 A lifting mechanism includes a lifting component 1, a transmission component 2, and an adjustment component 3. The transmission component 2 is connected between the adjustment component 3 and the lifting component 1. The lifting component 1 includes a first tube 11, a second tube 12, and a screw structure 13. The second tube 12 is slidably disposed on the outer wall of the first tube 11. In this embodiment, both the first tube 11 and the second tube 12 are hollow cylindrical structures. The adjustment component 3 and the transmission component 2 cooperate to realize the axial extension and retraction of the second tube 12 on the first tube 11.

[0031] Specifically, the screw structure 13 includes a slider 131, a lead screw 132, and an outer rod body 133. The outer rod body 133 is built into the first tube 11 and fixedly connected to the second tube 12. In this embodiment, the outer rod body 133 is a hollow cuboid structure and surrounds the lead screw 132. The slider 131 is rigidly connected to the outer rod body 133. The slider 131 slides along the length direction of the lead screw 132 through the geometric matching of the internal thread and the external thread of the lead screw 132.

[0032] Therefore, the user inputs power through the manual control adjustment component 3, and the torque is transmitted to the screw structure 13 through the transmission mechanism, thereby driving the lead screw 132 to rotate. The lead screw 132 and the slider 131 form a precision thread pair to convert the rotational motion into axial displacement, so that the rigidly connected outer rod 133 transmits the linear motion to the second tube 12, thereby driving the outer rod and the second tube 12 to move up and down relative to the first tube 11. At the same time, the outer rod 133 serves as both a motion guide for the second tube 12 and a radial constraint and protection for the lead screw 132, reducing the occurrence of external force vibration and dust and impurity intrusion on the lead screw 132.

[0033] On the other hand, refer to Figure 3 The adjustment component 3 includes a handle part 33, a connecting body 31, and a stud 32. One end of the connecting body 31 is rotatably connected to the transmission component 2 through the stud 32. The other end of the connecting body 31 is integrally formed with a first insertion part 311. One end of the handle part 33 is correspondingly integrally formed with a second insertion part 331. The first insertion part 311 and the second insertion part 331 are interference-fitted together.

[0034] Correspondingly, the user inputs rotational torque by holding the handle part 33, which is transmitted to the stud 32 through the rigidly connected connector 31, driving the transmission component 2 to rotate, and converting the circumferential motion into the precise angular displacement of the transmission component 2, ultimately controlling the linear extension and retraction of the second tube 12, which is simple and convenient.

[0035] Furthermore, the first insertion part 311 and the second insertion part 331 are connected by interference fit, which improves the load capacity and can withstand torque, axial force and combined load. It is suitable for torque transmission scenarios such as gears and shafts, and does not require fasteners, thus reducing production costs.

[0036] Meanwhile, the first insertion part 311 and the second insertion part 331 form a rotating pair. When the handle part 33 rotates to a suitable angle, the friction and pressure of mutual squeezing are used to lock the handle tightly against the connector 31, so that the handle part 33 is tightly against or flush with the connector 31, thereby saving space.

[0037] Corresponding to the above process, referring to Figure 4, the transmission component 2 includes a transmission module 21. One end of the transmission module 21 is fixed to the first tube 11. The transmission module 21 has a first gear and a second gear rotatably connected to the stud 32, and a third gear rotatably connected to the lead screw 132. The third gear meshes with the first gear and the second gear (not shown in the figure).

[0038] Therefore, when the user rotates the handle 33, the stud 32 rotates, driving the first gear to rotate. Through tooth surface contact, the second gear is driven to rotate in the opposite direction. The second gear meshes with the third gear, transmitting the rotational motion to the lead screw 132. The torque is amplified by the reduction ratio of the gear pair and the difference in the number of teeth between the first and second gears to achieve speed reduction. The third gear is directly connected to the lead screw 132 to maintain synchronous speed, ultimately converting the circumferential input of the stud 32 into the precise axial displacement of the lead screw 132.

[0039] Furthermore, this multi-stage gear meshing structure effectively improves transmission efficiency through torque amplification and reduced rotational speed, and is easy for users to operate. The built-in gear set reduces axial space occupation, making it suitable for scenarios requiring high-precision linear output, such as lifting mechanisms and precision instruments.

[0040] On the other hand, in this embodiment, a flat block-shaped first plastic part 111 and an annular second plastic part 112 are fixedly connected to the outer wall of the first tube 11. The surface of the first plastic part 111 is integrally formed with anti-slip protrusions 1111, thereby increasing the surface friction coefficient and making it slide in contact with the inner wall of the second tube 12 during the lifting process, reducing the verticality deviation of the lifting trajectory, and reducing the occurrence of movement deviation and shaking of the second tube 12.

[0041] Meanwhile, the bottom of the second plastic part 112 is provided with a boss 1121. The boss 1121 abuts against the bottom of the second tube 12 and absorbs impact energy through elastic deformation, reducing instability caused by vibration rebound and further improving lifting stability.

[0042] Correspondingly, the second tube 12 is provided with several grooves 121 of appropriate size through the anti-slip protrusion 1111, the first protrusion 1122 and the second protrusion 1123, so as to realize the snap-fit ​​between the first tube 11 and the second tube 12, thereby reducing the unexpected sliding during the lifting and lowering process of the second tube 12 and improving the torsional strength between the second tube 12 and the first tube 11.

[0043] On the other hand, the transmission assembly 2 also includes a transmission rod 22, and the transmission module 21 also includes a fourth gear (not shown in the figure). The fourth gear is built into the transmission module 21 and is rotatably connected to one end of the transmission rod 22. The fourth gear meshes with the first gear, the second gear and the third gear.

[0044] Furthermore, in this embodiment, the transmission rod 22 is composed of three rod segments 221 connected end to end by two connectors 222. The rod segments 221 at both ends of the transmission rod 22 can be rotatably connected to two sets of identical lifting components 1 through the fourth gear. At the same time, the connectors 222 can be locked and unlocked to adjust the insertion length of the rod segments 221 at both ends of the transmission rod 22 and the middle rod segment 221.

[0045] Therefore, the fourth gear and the other three gears form a fully meshing transmission system. By distributing the input torque to the entire transmission rod 22, the two sets of lifting components 1 at both ends of the transmission rod 22 are driven to lift and lower synchronously.

[0046] The implementation principle of a lifting mechanism in this application embodiment is as follows: The rotational torque applied by the user to the handle 33 is transmitted to the screw structure 13 through the transmission component 2, converting the rotational motion into the axial displacement of the second tube 12, and the moving speed is linearly related to the rotational speed of the handle 33. At the same time, multiple plastic parts on the inner wall of the first tube 11 contact the outer wall of the second tube 12, jointly constraining the motion trajectory, reducing the amount of sway during the lifting process, and realizing the stable release of the lifting function of the device.

[0047] 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 lifting mechanism, characterized in that, The device includes a lifting assembly (1), a transmission assembly (2), and an adjustment assembly (3). The transmission assembly (2) is connected between the adjustment assembly (3) and the lifting assembly (1). The lifting assembly (1) includes a first tube (11), a second tube (12), and a screw structure (13). The second tube (12) is slidably disposed on the outer wall of the first tube (11). The screw structure (13) is built into the first tube (11) and fixedly connected to the second tube (12). The adjustment assembly (3) and the transmission assembly (2) cooperate to realize the axial extension and retraction of the second tube (12) on the first tube (11).

2. The lifting mechanism according to claim 1, characterized in that, The screw structure (13) includes a slider (131), a lead screw (132), and an outer rod body (133). The outer rod body (133) completely covers the lead screw (132). The slider (131) is rigidly connected to the outer rod body (133). The second tube body (12) is fixed on the outer rod body (133). The slider (131) slides along the length direction of the lead screw (132) through the geometric matching of the internal thread and the external thread of the lead screw (132), thereby driving the outer rod body (133) and the second tube body (12) to move up and down relative to the first tube body (11).

3. A lifting mechanism according to claim 2, characterized in that, The adjustment component (3) includes a handle (33), a connector (31), and a stud (32). The handle (33) is fixedly connected to the connector (31), and the connector (31) is rotatably connected to the transmission component (2) through the stud (32).

4. A lifting mechanism according to claim 3, characterized in that, The connector (31) extends from one end away from the stud (32) and is provided with a first plug-in portion (311). One end of the handle portion (33) is provided with a corresponding second plug-in portion (331). The first plug-in portion (311) and the second plug-in portion (331) are press-fitted together so that the handle portion (33) can be rotated and folded along the end of the connector (31).

5. A lifting mechanism according to claim 3, characterized in that, The transmission assembly (2) includes a transmission module (21), one end of which is fixed to the first tube (11). The transmission module (21) has a first gear and a second gear rotatably connected to the stud (32), and a third gear rotatably connected to the lead screw (132). The third gear meshes with the first gear and the second gear.

6. A lifting mechanism according to claim 1, characterized in that, The outer wall of the first tube (11) is provided with a first plastic part (111) and a second plastic part (112). When the second tube (12) moves up and down on the first tube (11), the first plastic part (111) abuts against the inner wall of the second tube (12), and the second plastic part (112) abuts against the bottom of the second tube (12).

7. A lifting mechanism according to claim 6, characterized in that, The first plastic part (111) has anti-slip protrusions (1111) on its surface, and the second plastic part (112) has a boss (1121) at its bottom. A first protrusion (1122) extends from the boss (1121), and a second protrusion (1123) is provided on the surface of the second plastic part (112). The second tube (12) has several grooves (121) of appropriate size through it corresponding to the anti-slip protrusions (1111), the first protrusion (1122), and the second protrusion (1123), so as to realize the snap-fit ​​cooperation between the first tube (11) and the second tube (12).

8. A lifting mechanism according to claim 5, characterized in that, The transmission assembly (2) further includes a transmission rod (22), and the transmission module (21) further includes a fourth gear. The fourth gear is built into the transmission module (21) and is rotatably connected to one end of the transmission rod (22). The fourth gear meshes with the first gear, the second gear and the third gear. The other end of the transmission rod (22) is rotatably connected to another set of the same lifting assembly (1).

Images