Large-stroke telescopic stand column
By designing the opposite-directional synchronous expansion and contraction mechanism driven by worm and helical gear, the problem of short expansion and contraction distance of the column is solved, and the large stroke expansion and contraction of the column is achieved, meeting the needs of large stroke expansion and contraction equipment.
Patent Information
- Application Number
- CN202422065042.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-08-23
AI Technical Summary
In the prior art, the expansion distance of the column is short, which limits the effective working range of the equipment and cannot meet the needs of the expansion equipment for large strokes.
A large-stroke telescopic column is designed, including an outer pipe and an inner pipe. The inner pipe is equipped with an active screw and a passive screw. The helical gear rotates simultaneously through the rotation of the worm, and drives the passive screw and the active screw to expand and contract in a synchronous manner to realize the large-stroke telescopic column.
By improving transmission efficiency, the twin screws have synchronous expansion and contraction movement are achieved, which significantly expands the expansion and contraction distance of the column, and solves the problem of short expansion and contraction distance of the column.
Smart Images
Figure CN222880262U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of columns, in particular to a telescopic column with a large stroke. Background Art
[0002] The column is an important component of the equipment, used to carry other components of the equipment to move up and down. The electric push rod has the advantages of high control accuracy, low cost, customizable stroke, and easy maintenance. In order to realize the automatic control of the column, it is used to replace the traditional hydraulic cylinder and cylinder as the power source of the column.
[0003] After adding the electric push rod, the column can have the function of telescopic movement up and down, which can not only effectively increase the working range of the equipment, but also greatly reduce the space occupied by the equipment; however, the telescopic distance of the column in the prior art is relatively short, which will seriously limit the effective working range of the equipment and cannot effectively meet the needs of large-stroke telescopic equipment. Utility Model Content
[0004] The utility model aims to provide a telescopic column with a large stroke, aiming to solve the problem of short telescopic distance of the column in the prior art.
[0005] The utility model is implemented as follows: a long-stroke telescopic column comprises an outer tube and an inner tube sleeved in the outer tube, wherein an active screw and a passive screw are arranged in the inner tube, the bottom of the passive screw penetrates the inner tube from top to bottom and is exposed below the inner tube, a fixed bottom plate is connected to the bottom of the outer tube, and the bottom of the passive screw is fixedly connected to the fixed bottom plate;
[0006] The passive screw is sleeved with a first bevel gear, which is threadedly connected to the passive screw, the first bevel gear is meshedly connected to a worm arranged in a transverse shape, the worm is meshedly connected with a second bevel gear, the second bevel gear is sleeved on the outer periphery of the active screw, the active screw is transmission-connected with the second bevel gear, the active screw is sleeved with a telescopic sleeve that can move telescopically relative to the active screw, the telescopic sleeve is threadedly connected to the active screw, the telescopic sleeve is connected to a fixed top plate, the fixed top plate is located at the top of the inner tube, and the inner tube is movably connected to the fixed top plate;
[0007] When the worm is driven to rotate, the first bevel gear and the second bevel gear rotate synchronously in place, and the first bevel gear moves up and down relative to the passive screw, so that the inner tube moves up and down relative to the outer tube; the telescopic sleeve moves up and down relative to the active screw, so that the fixed top plate moves up and down relative to the inner tube; the double screws achieve synchronous telescopic movement in different directions, and the column achieves large-stroke telescopic movement.
[0008] Furthermore, a worm wheel is sleeved on the outer periphery of the worm, the worm wheel is fixedly connected to the worm, and the worm is meshingly connected to the motor via the worm wheel.
[0009] Furthermore, the worm is connected to a motor for driving the worm to rotate, the motor has a motor shaft, the motor shaft and the worm are meshedly connected via a worm gear, and the motor shaft and the worm are perpendicular to each other.
[0010] Furthermore, the first bevel gear has a threaded cavity for the passive screw to pass through up and down, and the first bevel gear is threadedly connected to the passive screw through the threaded cavity.
[0011] Furthermore, the second bevel gear has a fixed cavity for the active screw to pass through up and down, and a synchronous wheel is provided in the fixed cavity. The synchronous wheel and the second bevel gear are meshed and connected through the fixed cavity. The synchronous wheel is sleeved on the outer periphery of the active screw, and the active screw is transmission-connected to the synchronous wheel.
[0012] Furthermore, the outer tube has an internal cavity with a top opening, the fixed bottom plate is located on the bottom of the internal cavity, the inner tube is located in the internal cavity, a sliding gap is provided between the inner wall of the internal cavity and the outer wall of the inner tube, and a wear-resistant gasket is provided on the outer periphery of the inner tube, and the wear-resistant gasket is arranged circumferentially along the outer periphery of the inner tube.
[0013] Furthermore, a limit tube is sleeved on the outer circumference of the telescopic sleeve, and a switch ring that can be lifted up and down is sleeved on the bottom of the telescopic sleeve. The switch ring is located in the limit tube, and a travel switch is provided in the limit tube. The travel switch is extended along the length direction of the limit tube, the switch ring cooperates with the travel switch, and the travel switch is electrically connected to the motor.
[0014] Furthermore, the fixed top plate and the fixed bottom plate are arranged with a relative spacing in the longitudinal direction.
[0015] Furthermore, the first helical gear and the second helical gear are arranged side by side with a relative spacing.
[0016] Furthermore, the worm gear is located between the first bevel gear and the second bevel gear.
[0017] Compared with the prior art, the utility model provides a long-stroke telescopic column, which drives the first bevel gear and the second bevel gear to rotate synchronously in situ through the rotation of the worm, and the passive screw drives the first bevel gear to move up and down relative to the passive screw, so that the inner tube moves up and down relative to the outer tube, thereby driving the fixed top plate to move up and down once, and the second bevel gear drives the telescopic sleeve to move up and down relative to the active screw through the active screw, thereby driving the fixed top plate to move up and down twice, thereby improving the transmission efficiency, realizing the synchronous telescopic movement of the double screws in different directions, and realizing the long-stroke telescopic movement of the column; solving the problem of short telescopic distance of the column. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a three-dimensional schematic diagram of a telescopic column with a long stroke provided by the utility model;
[0019] Figure 2 It is an exploded three-dimensional schematic diagram of the long-stroke telescopic column provided by the utility model;
[0020] Figure 3 It is a cutaway stereoscopic schematic diagram of a long-stroke telescopic column provided by the utility model;
[0021] Figure 4 It is a three-dimensional schematic diagram of the worm and the worm wheel provided by the utility model;
[0022] Figure 5 It is an exploded stereoscopic schematic diagram of the first bevel gear and the passive screw provided by the utility model;
[0023] Figure 6 It is a three-dimensional schematic diagram of the second bevel gear, the telescopic sleeve and the travel switch provided by the utility model;
[0024] Figure 7 It is an exploded stereoscopic schematic diagram of the second bevel gear and the active screw provided by the utility model.
[0025] In the figure: outer tube 10, inner tube 20, worm 30, first bevel gear 40, second bevel gear 50, motor 60, fixed bottom plate 11, internal cavity 12, wear-resistant washer 22, worm wheel 31, passive screw 41, threaded cavity 42, telescopic sleeve 51, active screw 52, fixed cavity 53, synchronous wheel 54, fixed top plate 55, limit tube 511, switch ring 512, travel switch 513, motor shaft 61. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0027] The implementation of the present utility model is described in detail below in conjunction with specific embodiments.
[0028] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present utility model, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present utility model. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0029] Reference Figure 1-7 As shown, it is a preferred embodiment provided by the utility model.
[0030] The long-stroke telescopic column comprises an outer tube 10 and an inner tube 20 sleeved in the outer tube 10, wherein the inner tube 20 is provided with an active screw 52 and a passive screw 41, wherein the bottom of the passive screw 41 penetrates the inner tube 20 from top to bottom and is exposed below the inner tube 20, and a fixed bottom plate 11 is connected to the bottom of the outer tube 10, and the bottom of the passive screw 41 is fixedly connected to the fixed bottom plate 11;
[0031] A first bevel gear 40 is sleeved on the passive screw 41, and the first bevel gear 40 is threadedly connected to the passive screw 41. The first bevel gear 40 is meshedly connected to the worm 30 arranged horizontally. A second bevel gear 50 is meshedly connected to the worm 30. The second bevel gear 50 is sleeved on the outer periphery of the active screw 52. The active screw 52 is transmission-connected to the second bevel gear 50. A telescopic sleeve 51 that is telescopically movable relative to the active screw 52 is sleeved on the active screw 52. The telescopic sleeve 51 is threadedly connected to the active screw 52. A fixed top plate 55 is connected to the telescopic sleeve 51. The fixed top plate 55 is located at the top of the inner tube 20. The inner tube 20 is movably connected to the fixed top plate 55.
[0032] When the driving worm 30 rotates, the first bevel gear 40 and the second bevel gear 50 rotate synchronously in place, and the first bevel gear 40 moves up and down relative to the passive screw 41, so that the inner tube 20 moves up and down relative to the outer tube 10; the telescopic sleeve 51 moves up and down relative to the active screw 52, so that the fixed top plate 55 moves up and down relative to the inner tube 20; the double screws realize synchronous telescopic movement in different directions, and the column realizes large-stroke telescopic movement.
[0033] The long-stroke telescopic column provided above drives the first bevel gear 40 and the second bevel gear 50 to rotate synchronously in situ through the rotation of the worm 30, and the passive screw 41 drives the first bevel gear 40 to move up and down relative to the passive screw 41, so that the inner tube 20 moves up and down relative to the outer tube 10, thereby driving the fixed top plate 55 to move up and down once, and the second bevel gear 50 drives the telescopic sleeve 51 to move up and down relative to the active screw 52 through the active screw 52, thereby driving the fixed top plate 55 to move up and down twice, thereby improving the transmission efficiency, realizing the synchronous telescopic movement of the twin screws in different directions, and realizing the telescopic movement of the column with a large stroke; solving the problem of short telescopic distance of the column.
[0034] In this embodiment, a worm wheel 31 is sleeved on the outer periphery of the worm 30, the worm wheel 31 is fixedly connected to the worm 30, and the worm 30 is meshedly connected to the motor 60 through the worm wheel 31. In this way, the worm wheel 31 can be driven by the motor 60 to rotate, thereby driving the worm 30 to rotate, and the telescopic movement distance of the telescopic sleeve 51 and the passive screw 41 can be effectively and accurately controlled.
[0035] In this embodiment, the worm 30 is connected to a motor 60 for driving the worm 30 to rotate. The motor 60 has a motor shaft 61. The motor shaft 61 is meshed with the worm 30 through the worm wheel 31, and the motor shaft 61 and the worm 30 are perpendicular to each other. In this way, the motor 60 can drive the worm wheel 31 to rotate through the threads on the motor shaft 61, so that the worm wheel 31 drives the worm 30 to rotate.
[0036] In this embodiment, the first bevel gear 40 has a threaded cavity 42 for the passive screw 41 to pass through, and the first bevel gear 40 and the passive screw 41 are threadedly connected through the threaded cavity 42. In this way, the first bevel gear 40 can threadably drive the passive screw 41 to move up and down through the threaded cavity 42.
[0037] The telescopic sleeve 51 is coaxially arranged with the active screw 52. In this way, the telescopic sleeve 51 can be telescopically moved along the length direction of the active screw 52. The interior of the telescopic sleeve 51 is provided with a threaded cavity 42, which is threadedly connected to the active screw 52. The active screw 52 drives the telescopic sleeve 51 to telescopically move through its own thread.
[0038] In this embodiment, the second bevel gear 50 has a fixed cavity 53 for the active screw 52 to pass through up and down, and a synchronous wheel 54 is provided in the fixed cavity 53. The synchronous wheel 54 is meshed and connected with the second bevel gear 50 through the fixed cavity 53. The synchronous wheel 54 is sleeved on the outer periphery of the active screw 52, and the active screw 52 is connected to the synchronous wheel 54 in transmission.
[0039] The second bevel gear 50 meshes with the outer side of the synchronous wheel 54 through the gear groove of the fixed cavity 53 , so that the second bevel gear 50 can drive the synchronous wheel 54 to rotate in situ, and then drive the active screw 52 to rotate in situ through the synchronous wheel 54 .
[0040] In this embodiment, the outer tube 10 has an inner cavity 12 with an opening at the top, the fixed bottom plate 11 is located on the bottom of the inner cavity 12, the inner tube 20 is located in the inner cavity 12, and a sliding gap is provided between the inner side wall of the inner cavity 12 and the outer side wall of the inner tube 20. A wear-resistant gasket 22 is provided on the outer periphery of the inner tube 20, and the wear-resistant gasket 22 is arranged around the outer periphery of the inner tube 20. In this way, the structural size of the column can be reduced by sleeve-arranging the outer tube 10 of the outer tube 20, the wear-resistant gasket 22 is located in the sliding gap, and the inner tube 20 can effectively reduce the friction area between the inner tube 20 and the outer tube 10 through the wear-resistant gasket 22, thereby reducing the friction resistance between the two, and also increasing the stability of the inner tube 20 in the lifting process of the inner tube 20 in the inner cavity 12.
[0041] In this embodiment, a limit tube 511 is sleeved on the outer periphery of the telescopic sleeve 51, and a switch ring 512 that can be lifted up and down is sleeved on the bottom of the telescopic sleeve 51. The switch ring 512 is located in the limit tube 511. A travel switch 513 is provided in the limit tube 511. The travel switch 513 is extended along the length direction of the limit tube 511. The switch ring 512 cooperates with the travel switch 513, and the travel switch 513 is electrically connected to the motor 60.
[0042] The limit tube 511 is used to protect the stability of the telescopic movement of the telescopic sleeve 51. The limit tube 511 provides touch sensing for the switch ring 512 on the telescopic sleeve 51 through the travel switch 513, so that when the telescopic sleeve 51 is extended and retracted to a certain position in the limit tube 511, the travel switch 513 transmits a signal to the motor 60, and the motor 60 stops driving the worm gear 31, and then stops driving the telescopic sleeve 51, which can effectively prevent the telescopic sleeve 51 from derailing.
[0043] In this embodiment, the fixed top plate 55 is arranged longitudinally with a relative spacing from the fixed bottom plate 11. The fixed bottom plate 11 serves as a bottom support point, while the fixed top plate 55 serves as a driving point for large-stroke telescopic movement.
[0044] In this embodiment, the first bevel gear 40 and the second bevel gear 50 are arranged side by side with a relative spacing. In this way, the utilization rate of the structure on the space of the inner tube 20 can be reduced, and the two will not affect each other.
[0045] In this embodiment, the worm gear 31 is located between the first bevel gear 40 and the second bevel gear 50. In this way, the rotation of the worm gear 31 will not collide with the first bevel gear 40 and the second bevel gear 50, and this structural arrangement can increase the stability of the meshing transmission.
[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. Long-stroke telescopic column, characterized in that: It comprises an outer tube and an inner tube sleeved in the outer tube, wherein the inner tube is provided with an active screw and a passive screw, the bottom of the passive screw penetrates the inner tube from top to bottom and is exposed below the inner tube, the bottom of the outer tube is connected to a fixed bottom plate, and the bottom of the passive screw is fixedly connected to the fixed bottom plate; The passive screw is sleeved with a first bevel gear, which is threadedly connected to the passive screw, the first bevel gear is meshedly connected to a worm arranged in a transverse shape, the worm is meshedly connected with a second bevel gear, the second bevel gear is sleeved on the outer periphery of the active screw, the active screw is transmission-connected with the second bevel gear, the active screw is sleeved with a telescopic sleeve that can move telescopically relative to the active screw, the telescopic sleeve is threadedly connected to the active screw, the telescopic sleeve is connected to a fixed top plate, the fixed top plate is located at the top of the inner tube, and the inner tube is movably connected to the fixed top plate; When the worm is driven to rotate, the first bevel gear and the second bevel gear rotate synchronously in place, and the first bevel gear moves up and down relative to the passive screw, so that the inner tube moves up and down relative to the outer tube; the telescopic sleeve moves up and down relative to the active screw, so that the fixed top plate moves up and down relative to the inner tube; the double screws achieve synchronous telescopic movement in different directions, and the column achieves large-stroke telescopic movement.
2. The long-stroke telescopic column according to claim 1, characterized in that: A worm wheel is sleeved on the outer circumference of the worm, the worm wheel is fixedly connected to the worm, and the worm is meshingly connected to the motor through the worm wheel.
3. The long-stroke telescopic column according to claim 2, characterized in that: The worm is connected to a motor for driving the worm to rotate. The motor has a motor shaft. The motor shaft and the worm are meshed and connected via a worm gear. The motor shaft and the worm are perpendicular to each other.
4. The long-stroke telescopic column according to claim 3, characterized in that: The first bevel gear has a thread cavity for the passive screw to pass through up and down, and the first bevel gear is threadedly connected with the passive screw through the thread cavity.
5. The long-stroke telescopic column according to claim 4, characterized in that: The second bevel gear has a fixed cavity for the active screw to pass through up and down, and a synchronous wheel is provided in the fixed cavity. The synchronous wheel is meshed and connected with the second bevel gear through the fixed cavity. The synchronous wheel is sleeved on the outer circumference of the active screw, and the active screw is transmission-connected with the synchronous wheel.
6. The long-stroke telescopic column according to claim 5, characterized in that: The outer tube has an inner cavity with a top opening, the fixed bottom plate is located on the bottom of the inner cavity, the inner tube is located in the inner cavity, a sliding gap is provided between the inner wall of the inner cavity and the outer wall of the inner tube, and a wear-resistant gasket is provided on the outer periphery of the inner tube, and the wear-resistant gasket is arranged circumferentially along the outer periphery of the inner tube.
7. The long-stroke telescopic column according to any one of claims 3 to 6, characterized in that: A limit tube is sleeved on the outer circumference of the telescopic sleeve, and a switch ring that can be lifted up and down is sleeved on the bottom of the telescopic sleeve. The switch ring is located in the limit tube, and a travel switch is provided in the limit tube. The travel switch is extended along the length direction of the limit tube, the switch ring cooperates with the travel switch, and the travel switch is electrically connected to the motor.
8. The long-stroke telescopic column according to any one of claims 1 to 6, characterized in that: The fixed top plate and the fixed bottom plate are arranged relatively spaced apart in the longitudinal direction.
9. The long-stroke telescopic column according to claim 8, characterized in that: The first helical gear and the second helical gear are arranged side by side with a relative spacing.
10. The long-stroke telescopic column according to claim 2, characterized in that: The worm gear is located between the first helical gear and the second helical gear.