Rotation limiting structure of lifting rod
By designing a rotary limit structure in the lifting rod, and using the coordination of the limit projection and limit groove, the problem of rotation of the lifting chair during the lifting process is solved, and the stability of the lifting chair height is achieved.
Patent Information
- Application Number
- CN202421954138.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-08-13
AI Technical Summary
Existing lift chairs are prone to rotate during the lifting process, resulting in the screws being unable to fully abut into the abutment groove of the lifting inner rod, affecting the height stability.
A rotary limit structure of a lifting rod is designed, including a lifting outer rod, a limiting cylinder, a lifting inner rod and a locking member. There is a limiting protrusion on the limiting cylinder, which coincides with the limiting slot on the lifting inner rod to ensure that the lifting inner rod can only slide up and down but cannot rotate.
Through the limit structure, the lifting inner rod does not rotate when moving up and down within the lifting outer rod, and the screws can stably abut in the abutment groove, improving the height stability of the lifting chair.
Smart Images
Figure CN222840708U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of lift chair manufacturing, and in particular to a rotation limiting structure of a lift rod. Background Art
[0002] In the prior art lifting chair, the height adjustment of the lifting chair is mainly achieved through a lifting rod. The lifting rod includes an inner lifting rod and an outer lifting rod. The inner lifting rod is inserted into the inner lifting rod and slides up and down to change the height of the lifting chair. After the height is determined, a screw is passed through the outer lifting rod to abut against the abutment groove of the inner lifting rod to stabilize the lifting chair at the height.
[0003] However, in actual operation, the lifting inner rod is prone to rotate during the up and down sliding process, so that the screw cannot completely abut against the abutment groove of the lifting inner rod, affecting the height stabilization effect of the lifting inner rod, making the lifting chair unable to stabilize at the required height. Utility Model Content
[0004] In order to prevent the lifting chair from rotating during the lifting process, the present application provides a rotation limiting structure of the lifting rod.
[0005] The present application provides a lifting rod rotation limiting structure adopts the following technical solution:
[0006] A rotation limiting structure of a lifting rod comprises a lifting outer rod, a limiting cylinder, a lifting inner rod and a locking piece, wherein a threaded interface connecting the outside and the inside of the lifting outer rod is arranged in the radial direction of the lifting outer rod; the limiting cylinder comprises an inner cylinder and an outer cylinder connected at the top ends, the inner cylinder is tightly fitted and inserted in the lifting outer rod, the outer cylinder is limitedly abutted against the top end of the lifting outer rod, and the inner cylinder is provided with a limiting protrusion protruding toward the axis of the lifting outer rod; the lifting inner rod is inserted in the inner cylinder, and a limiting groove and an abutting groove extending along the axial direction of the lifting inner rod are arranged on the outer wall of the lifting inner rod, the abutting groove is aligned with the threaded interface, and the limiting groove is slidably engaged with the limiting protrusion; the locking piece is threadably matched with the threaded interface and abuts against the abutting groove.
[0007] Based on the above technical solution, the lifting inner rod is inserted into the lifting outer rod, and can slide inside the lifting outer rod to achieve height change. An abutment groove along the rod direction is opened on the lifting inner rod. By using a screw passing through the threaded interface on the lifting outer rod and abutting the abutment groove, the height of the lifting inner rod can be fixed. In addition, a limiting cylinder is installed on the port of the lifting outer rod, and a limiting protrusion is provided on the limiting cylinder. The limiting protrusion coincides with the limiting groove on the lifting inner rod. Therefore, the lifting inner rod can only slide up and down inside the lifting outer rod but cannot rotate.
[0008] Preferably, a positioning notch is provided on the port of the lifting outer rod, and the limiting cylinder is provided with a positioning block matching the positioning notch, so that the limiting cylinder cannot rotate on the lifting outer rod.
[0009] Preferably, a first reinforcing rib is provided on the back of the limiting protrusion to increase the structural strength.
[0010] Preferably, the length of the limiting groove is greater than the length of the abutting groove.
[0011] Based on the above technical solution, the length of the upper limit groove of the lifting inner rod is set to be greater than the length of the abutment groove to ensure that the lifting inner rod is always subject to rotational limit when moving up and down, so that the lifting inner rod can only rise or fall inside the lifting outer rod and cannot rotate.
[0012] Preferably, the limiting groove extends to the bottom end of the lifting inner rod.
[0013] Preferably, the threaded interface is protrudingly arranged on the lifting outer rod.
[0014] Based on the above technical solution, the threaded interface on the lifting outer rod is protrudingly arranged on the lifting outer rod. The threaded interface is used to allow the screw to extend into the interior of the lifting outer rod through the threaded interface and abut against the lifting inner rod, thereby achieving the height fixation of the lifting inner rod. The threaded interface is protrudingly arranged to prevent the screw from falling out easily when adjusting the screw.
[0015] Preferably, the limiting cylinder is provided with a through hole at a position corresponding to the threaded interface, and a second reinforcing rib is fixedly connected to the inner side wall of the outer cylinder of the limiting cylinder.
[0016] Based on the above technical solution, the limiting cylinder covers the position of the threaded interface on the lifting outer rod. In order to allow the screw to smoothly extend into the lifting outer rod, a through hole is provided at the position corresponding to the threaded interface on the limiting cylinder. At the same time, the screw is inserted into the through hole and enters the threaded interface, which can further limit the rotation of the limiting cylinder. In addition, the distance between the inner cylinder and the outer cylinder of the limiting cylinder is the length of the threaded interface, and a second reinforcing rib is provided on the inner side wall of the outer cylinder of the limiting cylinder to support the limiting cylinder and prevent the limiting cylinder from deformation.
[0017] Preferably, a limiting bottom ring is sleeved on the lifting outer rod, a snap buckle is provided on the limiting bottom ring, and a snap groove matching the snap buckle is provided on the outer cylinder of the limiting cylinder.
[0018] Based on the above technical solution, the limiting bottom ring is sleeved under the upper limiting cylinder of the lifting outer rod to seal the limiting cylinder. The limiting cylinder and the limiting bottom ring are connected by a snap buckle and a snap groove.
[0019] Preferably, the locking member (50) is a glass ball screw, and a knob with a groove on the side is fixedly connected to the outer side of the glass ball screw.
[0020] Based on the above technical solution, the locking member (50) adopts a glass bead screw, the end of the glass bead screw is hemispherical, and the inside of the abutment groove is arc-shaped. The shape of the glass bead screw can make the contact area between the screw and the abutment groove larger, play a better abutment effect, and fix the lifting inner rod to a certain height.
[0021] Preferably, the depth of the abutment groove gradually increases from top to bottom.
[0022] Based on the above technical solution, in order to avoid a large change in the height of the lifting inner rod when loosening the screw to adjust the height of the lifting inner rod, the abutment groove is set to a shape in which the depth gradually increases from top to bottom, so that the screw must be turned while the lifting inner rod can be moved up and down, so that the lifting inner rod will not rise or fall significantly.
[0023] In summary, the present application includes at least one of the following beneficial technical effects:
[0024] 1. A limit cylinder is installed on the port of the lifting outer rod. A limit protrusion is provided on the limit cylinder. The limit protrusion matches the limit groove on the lifting inner rod. Therefore, the lifting inner rod can only slide up and down inside the lifting outer rod but cannot rotate.
[0025] 2. Set the length of the upper limit groove of the lifting inner rod to be greater than the length of the abutment groove to ensure that the lifting inner rod is always subject to rotation limit when moving up and down, so that the lifting inner rod can only rise or fall inside the lifting outer rod and cannot rotate;
[0026] 3. The threaded interface on the lifting outer rod is protrudingly arranged on the lifting outer rod. The threaded interface is used to allow the screw to extend into the interior of the lifting outer rod through the threaded interface and abut against the lifting inner rod, thereby achieving height fixation of the lifting inner rod. The threaded interface is protrudingly arranged to prevent the screw from falling out easily when adjusting the screw. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 An overall schematic diagram of an embodiment of the present application is depicted;
[0028] Figure 2 An exploded view of an embodiment of the present application is depicted;
[0029] Figure 3 The embodiment of the present application is different from Figure 2 Exploded view from the angle of
[0030] Figure 4 A schematic diagram of a limiting cylinder according to an embodiment of the present application is depicted.
[0031] Explanation of the reference numerals in the accompanying drawings: 10, lifting outer rod; 11, threaded interface; 12, positioning notch; 20, lifting inner rod; 21, abutment groove; 22, limiting groove; 30, limiting cylinder; 31, inner cylinder; 32, outer cylinder; 33, limiting protrusion; 34, first reinforcing rib; 35, second reinforcing rib; 36, through hole; 40, limiting bottom ring; 41, snap buckle; 42, snap groove; 50, locking piece. DETAILED DESCRIPTION
[0032] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the following is a further detailed description of a semiconductor package fault detection method, device and fixture provided by the present invention in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0033] It should be noted that the terms “setting” and “connection” should be understood in a broad sense. For example, it can be directly setting or connecting, or it can be indirectly setting or connecting through a central component or a central structure.
[0034] In addition, in the embodiments of the present invention, if there are terms indicating orientation or positional relationships such as "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., they are based on the orientation or positional relationships or conventional placement states or usage states shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure, feature, device or element referred to must have a specific orientation or positional relationship, nor must it be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.
[0035] The present application is further described in detail below in conjunction with all the accompanying drawings.
[0036] The embodiment of the present application discloses a rotation limiting structure of a lifting rod. Figure 1 and Figure 4The rotation limiting structure of the lifting rod includes a lifting outer rod 10, a limiting cylinder 30, a lifting inner rod 20, and a locking member 50. A threaded interface 11 is provided in the radial direction of the lifting outer rod 10 to connect the outside and the inside of the lifting outer rod 10; the limiting cylinder 30 includes an inner cylinder 31 and an outer cylinder 32 connected at the top end, the inner cylinder 31 is tightly inserted in the lifting outer rod 10, the outer cylinder 32 is limitedly abutted against the top of the lifting outer rod 10, and the inner cylinder 31 is provided with a protrusion toward the axis of the lifting outer rod 10 The limiting protrusion 33 is provided, and the shape and number of the limiting protrusion 33 are not specifically limited. For example, the cross section of the limiting protrusion 33 can be heart-shaped; the lifting inner rod 20 is inserted into the inner tube 31, and the outer wall of the lifting inner rod 20 is provided with a limiting groove 22 and an abutting groove 21 extending along the axial direction of the lifting inner rod 20, the abutting groove 21 is aligned with the threaded interface 11, and the limiting groove 22 is slidably engaged with the limiting protrusion 33; the locking member is threadedly matched with the threaded interface 11 and abuts against the abutting groove 21. The rotation limiting structure of the lifting rod disclosed in the present application can prevent the lifting rod from rotating during lifting by slidingly engaging the limiting groove 22 with the limiting protrusion 33.
[0037] Among them, the limiting cylinder 30 can be made of plastic integral molding, a locking notch 12 is provided on the end of the lifting outer rod 10, the limiting cylinder 30 is provided with a positioning block matching the locking notch 12 for easy positioning and assembly, and a first reinforcing rib 34 is provided on the back of the limiting protrusion 33 to increase the structural strength.
[0038] The abutment groove 21 and the limiting groove 22 on the lifting inner rod 20 can be arranged relatively along the length direction of the lifting inner rod 20. The abutment groove 21 is an arc-shaped groove, and the depth gradually deepens from top to bottom. The bottom end of the limiting groove 22 extends to the bottom end of the lifting inner rod 20. The lifting outer rod 10 is a hollow rod with openings at both ends, one end of which is used to connect the pulley structure, and the other end is used to plug the lifting inner rod 20. The lifting outer rod 10 is protruding on the opposite side of the positioning notch 12. A threaded interface 11 is provided, and the threaded interface 11 connects the outside of the lifting outer rod 10 and Internally, an internal thread is provided on the inner wall of the threaded interface 11. After the lifting inner rod 20 is inserted into the lifting outer rod 10, the locking piece 50 is passed through the threaded interface 11 of the lifting outer rod 10 to abut against the abutment groove 21 of the lifting inner rod 20. The locking piece 50 is rotated clockwise or counterclockwise to change the depth of the locking piece 50 extending into the abutment groove 21, so that after the height of the lifting inner rod 20 is adjusted, the screw can abut against the bottom of the abutment groove 21 to position the lifting inner rod 20, thereby playing a role in height adjustment.
[0039] Specifically, the locking member 50 adopts a glass bead screw. Since the abutment groove 21 is arc-shaped, the glass bead screw is provided to increase the contact area with the abutment groove 21, thereby improving the abutment effect of the screw on the lifting inner rod 20. The end of the glass bead screw away from the lifting inner rod 20 is fixedly connected to a knob with a groove on the side. The groove is provided to increase the friction of the knob, thereby facilitating the rotation of the screw to adjust the depth of the screw extending into the abutment groove 21.
[0040] Specifically, refer to Figure 4 The limiting cylinder 30 is provided with an inner cylinder 31 and an outer cylinder 32. The upper ends of the inner cylinder 31 and the outer cylinder 32 are connected to each other. The inner cylinder 31 is located inside the lifting outer rod 10, and the outer cylinder 32 is located outside the lifting outer rod 10. The inner cylinder 31 of the limiting cylinder 30 is provided with a limiting protrusion 33. Figure 3 A limiting groove 22 is formed on the outer wall of the lifting inner rod 20 along the length direction of the lifting inner rod 20, and the limiting protrusion 33 can be snapped into the limiting groove 22, and the limiting protrusion 33 can slide up and down in the limiting groove 22. Because the limiting cylinder 30 is fixed relative to the lifting outer rod 10, and the limiting protrusion 33 on the limiting cylinder 30 is snapped on the limiting groove 22 of the lifting inner rod 20, the lifting inner rod 20 can only slide up and down relative to the lifting outer rod 10, and cannot rotate. Therefore, the limiting cylinder 30 can prevent the lifting inner rod 20 from rotating when sliding up and down, so that the positioning of the lifting inner rod 20 by the screw is more stable.
[0041] Specifically, the length of the limiting groove 22 is greater than that of the abutting groove 21, ensuring that the lifting inner rod 20 is always rotationally limited when moving up and down, so that the lifting inner rod 20 can only rise or fall inside the lifting outer rod 10 but cannot rotate.
[0042] Specifically, refer to Figure 2 The limiting cylinder 30 is provided with a through hole 36, the position of which corresponds to the position of the threaded interface 11 on the lifting outer rod 10, so that the glass ball screw passes through the through hole 36 and enters the threaded interface 11 of the lifting outer rod 10 and abuts against the abutting groove 21, thereby further limiting the position of the limiting cylinder 30. In addition, a second reinforcing rib 35 is integrally formed on the outer cylinder 32 of the limiting cylinder 30, and the second reinforcing rib 35 is used to support the outer cylinder 32 of the limiting cylinder 30 to prevent the limiting cylinder 30 from deformation.
[0043] Specifically, refer to Figure 3 A limiting bottom ring 40 is sleeved on the lifting outer rod 10, and a snap-fit buckle 41 is provided on the limiting bottom ring 40. A snap-fit groove 42 is provided on the outer tube 32 of the limiting tube 30. The limiting tube 30 and the limiting bottom ring 40 are connected by the snap-fit buckle 41 and the snap-fit groove 42, which are used to seal the limiting tube 30.
[0044] The implementation principle of the rotation limit structure of a lifting rod in an embodiment of the present application is as follows: a limit cylinder 30 is arranged on the lifting outer rod 10, a limit protrusion 33 is arranged on the limit cylinder 30, and a limit groove 22 is formed on the lifting inner rod 20. The limit protrusion 33 can be clamped in the limit groove 22 and slide in the limit groove 22. Therefore, when the lifting inner rod 20 moves up and down, the rotation of the lifting inner rod 20 can be limited, ensuring that the screw always passes through the lifting outer rod 10 and abuts in the abutment groove 21, thereby improving the stability of the lifting inner rod 20 at a certain height.
[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A rotation limiting structure of a lifting rod, characterized in that: include: A lifting outer rod (10), wherein a threaded interface (11) is provided in the radial direction of the lifting outer rod (10) for connecting the outside world and the interior of the lifting outer rod (10); A limiting cylinder (30), the limiting cylinder (30) comprising an inner cylinder (31) and an outer cylinder (32) connected at their ends, the inner cylinder (31) being tightly inserted into the lifting outer rod (10), the outer cylinder (32) being limitedly abutted against the top end of the lifting outer rod (10), and the inner cylinder (31) being provided with a limiting protrusion (33) protruding toward the axis of the lifting outer rod (10); The lifting inner rod (20) is inserted into the inner tube (31), and the outer wall of the lifting inner rod (20) is provided with a limiting groove (22) and an abutting groove (21) extending along the axial direction of the lifting inner rod (20), the abutting groove (21) is aligned with the threaded interface (11), and the limiting groove (22) is slidably engaged with the limiting protrusion (33); The locking member (50) is threadably matched with the threaded interface (11) and abuts against the abutment groove (21).
2. The rotation limiting structure of the lifting rod according to claim 1 is characterized in that: A locking notch (12) is provided on the end of the lifting outer rod (10), and the limiting cylinder (30) is provided with a positioning block matching the locking notch (12).
3. The rotation limiting structure of the lifting rod according to claim 1 is characterized in that: The back of the limiting protrusion (33) is provided with a first reinforcing rib (34).
4. The rotation limiting structure of the lifting rod according to claim 1, characterized in that: The length of the limiting groove (22) is greater than the length of the abutting groove (21).
5. The rotation limiting structure of the lifting rod according to claim 1, characterized in that: The limiting groove (22) extends to the bottom end of the lifting inner rod (20).
6. The rotation limiting structure of the lifting rod according to claim 1, characterized in that: The depth of the abutment groove (21) gradually increases from the top end to the bottom end.
7. The rotation limiting structure of the lifting rod according to claim 1, characterized in that: The limiting cylinder (30) is provided with a through hole (36) at a location corresponding to the threaded interface (11), and a second reinforcing rib (35) is fixedly connected to the inner side wall of the outer cylinder (32) of the limiting cylinder (30).
8. The rotation limiting structure of the lifting rod according to claim 1, characterized in that: A limit bottom ring (40) is sleeved on the lifting outer rod (10), a snap-fit buckle (41) is provided on the limit bottom ring (40), and a snap-fit groove (42) matching the snap-fit buckle (41) is provided on the outer cylinder (32) of the limit cylinder (30).
9. The rotation limiting structure of the lifting rod according to claim 1, characterized in that: The locking member (50) is a glass bead screw, and a knob with a groove on the side is fixedly connected to the outer side of the glass bead screw.
10. The rotation limiting structure of the lifting rod according to claim 1, characterized in that: The limiting cylinder (30) is integrally formed of plastic.