Lift column

Abstract

The present application relates to the technical field of roadblock equipment, and discloses a lifting column, which comprises a cylinder assembly, a first transmission mechanism, a second transmission mechanism and a driving mechanism. The cylinder assembly comprises a first cylinder, a second cylinder and a third cylinder which are sequentially connected in sliding mode. The first transmission mechanism comprises a first screw rod and a gear nut, the first screw rod is fixedly supported on the first cylinder, the gear nut is threadedly connected with the first screw rod and connected with the second cylinder. The second transmission mechanism comprises a second screw rod, a driven gear and a connecting nut, the second screw rod is rotatably connected with the second cylinder, the driven gear is sleeved on the outer side of the second screw rod and fixedly connected with the second screw rod, the connecting nut is threadedly connected with the second screw rod and connected with the third cylinder, the second screw rod is provided with a receiving cavity, and the first screw rod can extend into the receiving cavity. The driving mechanism is installed on the second cylinder, and the driving mechanism is connected with the gear nut and the driven gear. In this way, the excavation depth during installation of the lifting column is reduced, and the lifting column can be quickly lifted into place.

Description

Technical Field

[0001] This invention relates to the field of road barrier equipment technology, and in particular to a rising bollard. Background Technology

[0002] Rising bollards, also known as rising road bollards, anti-collision road bollards, or guardrails, are widely used in urban traffic, military, and the gates and surrounding areas of important national institutions. By restricting the passage of vehicles, they effectively ensure traffic order and the safety of major facilities and locations.

[0003] Most current bollards use a single, movable, telescopic cylinder. This results in the bollard being too tall after it has descended to its final position, even when a certain rising height is required. During installation, a deep trench needs to be excavated to accommodate the bollard's height, which is time-consuming and labor-intensive. Furthermore, the long stroke of the single, movable, telescopic cylinder leads to a slow ascent and descent speed, affecting the bollard's ability to block or release obstacles. Summary of the Invention

[0004] The present invention aims to provide a rising column to solve the technical problems in the prior art where the installation of rising columns requires the excavation of deep trenches and the cylinder body is raised and lowered slowly.

[0005] This invention provides a rising bollard, the rising bollard comprising:

[0006] The cylindrical assembly includes a first cylindrical body, a second cylindrical body, and a third cylindrical body, wherein the first cylindrical body, the second cylindrical body, and the third cylindrical body are slidably connected in sequence;

[0007] The first transmission mechanism includes a first screw and a gear nut. One end of the first screw is fixedly supported on the first cylinder. The gear nut is threadedly connected to the first screw and connected to the second cylinder.

[0008] The second transmission mechanism includes a second screw, a driven gear, and a connecting nut. One end of the second screw is rotatably connected to the second cylinder. The driven gear is sleeved on the outside of the second screw and fixed to the second screw. The connecting nut is threadedly connected to the second screw and connected to the third cylinder. The second screw is provided with a receiving cavity, and the other end of the first screw can extend into the receiving cavity.

[0009] A drive mechanism is installed on the second cylinder. The drive mechanism is connected to the gear nut and the driven gear, and can drive the gear nut and the driven gear to rotate respectively, so that the gear nut moves up and down synchronously along the first screw and the connecting nut moves up and down synchronously along the second screw.

[0010] In some embodiments, the drive mechanism includes a drive motor and a drive bevel gear, wherein the drive bevel gear is connected to the output shaft of the drive motor;

[0011] The gear nut is provided with a first bevel tooth portion, and the driven gear is provided with a second bevel tooth portion. The first bevel tooth portion and the second bevel tooth portion are opposite to each other, and the first bevel tooth portion and the second bevel tooth portion respectively mesh with the driving bevel gear.

[0012] In some embodiments, the second cylinder includes a middle cylinder base, the gear nut and the driven gear are respectively disposed on opposite sides of the middle cylinder base, and the gear nut is closer to the bottom of the first cylinder than the driven gear. The gear nut abuts against the middle cylinder base, the drive motor is mounted on the middle cylinder base, and the driving bevel gear passes through the middle cylinder base and meshes with the gear nut and the driven gear.

[0013] In some embodiments, the first transmission mechanism further includes an anti-wear component disposed between the middle cylinder base and the gear nut.

[0014] In some embodiments, the first screw is clearance-fitted with the inner wall of the accommodating cavity;

[0015] The first transmission mechanism further includes a first anti-vibration sleeve, which is installed at the other end of the first screw. The outer side wall of the first anti-vibration sleeve is provided with a first protruding edge, which abuts against the inner wall of the accommodating cavity.

[0016] In some embodiments, the second transmission mechanism further includes a connecting pipe, one end of which is fixed to the connecting nut, and the other end of which is connected to the top of the third cylinder. The connecting pipe is provided with a conduit, and the other end of the second screw can extend into the conduit.

[0017] In some embodiments, the second screw is clearance-fitted with the inner wall of the pipe;

[0018] The second transmission mechanism further includes a second anti-vibration sleeve, which is installed at the other end of the second screw. The outer side wall of the second anti-vibration sleeve is provided with a second protruding edge, which abuts against the inner wall of the pipe.

[0019] In some embodiments, the rising column further includes:

[0020] A first guiding mechanism is disposed between the first cylinder and the second cylinder and serves to guide the second cylinder;

[0021] A second guiding mechanism is disposed between the second cylinder and the third cylinder and serves to guide the third cylinder.

[0022] In some embodiments, the first guiding mechanism includes a guide rod and at least two first guide blocks. The guide rod is arranged along an axial direction parallel to the first cylinder and fixed to the first cylinder. The at least two first guide blocks are arranged at intervals along the axial direction of the second cylinder and fixed to the second cylinder. Each first guide block abuts against the inner wall of the first cylinder. Each first guide block is provided with a corresponding guide hole, and the guide rod passes through the guide hole.

[0023] The second guiding mechanism includes at least two second guiding blocks, which are spaced apart along the axial direction of the third cylinder and fixed to the third cylinder, with each second guiding block abutting against the inner wall of the second cylinder.

[0024] In some embodiments, the cylindrical assembly further includes a support base supported on the bottom of the first cylindrical body, a first guide mechanism connecting the support base and the second cylindrical body, one end of the first screw fixed to the support base, and the second cylindrical body, the third cylindrical body, the first transmission mechanism, the second transmission mechanism, the drive mechanism, the first guide mechanism, and the second guide mechanism all supported on the support base.

[0025] Compared to traditional single-section lifting columns (which only have one movable and retractable cylinder), the lifting column of this invention has movable and retractable second and third cylinders. Under the same lifting height, this increases the column's retraction rate and reduces the overall height after retraction, thereby reducing the excavation depth during installation and facilitating on-site installation. Furthermore, traditional single-section lifting columns have relatively long screws, requiring higher straightness during processing. In this embodiment, by dividing the screw into a first screw and a second screw, the length of each individual screw is reduced while maintaining the extended length of the lifting column, thus lowering the processing difficulty of each screw.

[0026] Compared with the prior art, in the lifting column of this invention, the drive mechanism synchronously drives the gear nut and the driven gear to rotate in opposite directions. This allows the gear nut to rise and fall synchronously along the first screw and the connecting nut along the second screw, while simultaneously driving the second and third cylinders relative to the first cylinder, and the connecting nut to drive the third cylinder relative to the second cylinder. This allows the second and third cylinders to rise and fall synchronously to their positions during the lifting process, meaning that all movable and retractable cylinders can rise and fall synchronously to their positions, shortening the overall lifting column's rising and falling time. Furthermore, the drive mechanism is installed on the second cylinder. When the drive mechanism drives the gear nut to rotate around the first screw and rise and fall along the first screw, the gear nut drives the second cylinder, and the second cylinder drives the second transmission mechanism and the drive mechanism to rise and fall together. This avoids deviations in the fit between the drive mechanism, the gear nut, and the driven gear, ensuring synchronous displacement of the second transmission mechanism, the drive mechanism, and the gear nut relative to the first screw, and guaranteeing the overall stable operation of the lifting column.

[0027] Furthermore, during the process of the gear nut driving the second cylinder and the second cylinder driving the second screw to rise and fall together, the other end of the first screw can extend into the receiving cavity of the second screw, avoiding motion interference between the second screw and the first screw when the second screw rises and falls with the second cylinder. This allows the axes of the first screw and the second screw to coincide or approximately coincide, enabling the first transmission mechanism and the second transmission mechanism to bear load or apply thrust to the corresponding cylinder on the same axis or approximately on the same axis, thereby ensuring that the lifting column is subjected to balanced force and runs smoothly during the lifting process.

[0028] Compared to traditional hydraulic or pneumatic lifting columns, the lifting column of this embodiment uses a combination of screw and nut as the transmission mechanism, which avoids the pressure holding problem of hydraulic or pneumatic lifting columns, as well as the problem of hydraulic oil freezing in cold regions, which prevents the product from being used normally. In addition, the lifting column of this embodiment has lower mechanical assembly space requirements, does not require the laying of oil pipes or air pipes, and is easy to install. Attached Figure Description

[0029] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings do not constitute a limitation on scale.

[0030] Figure 1 This is a state diagram of the lifting column after it has been lowered into place, according to one embodiment of the present invention;

[0031] Figure 2 yes Figure 1 The diagram shows another state after the rising column has reached its position.

[0032] Figure 3yes Figure 1 The shown is a cross-sectional view of the lifting column along the AA direction;

[0033] Figure 4 yes Figure 2 The sectional view of the lifting column along the BB direction shown;

[0034] Figure 5 yes Figure 1 The diagram shown is an exploded view of the lifting column.

[0035] Figure 6 yes Figure 3 A magnified view of part C of the lifting column shown.

[0036] The reference numerals in the attached figures are shown in the table below:

[0037] Detailed Implementation

[0038] To facilitate understanding of the present invention, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "connected" to another element, it can be directly on the other element, or one or more intermediate elements can exist between them. The terms "upper," "lower," "left," "right," "upper end," "lower end," "top," and "bottom," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0040] It is understood that, during the installation of the rising bollard in this embodiment of the invention, it can be placed at the bottom of the mounting groove below the ground, with its vertical position relatively clear. The rising bollard can extend out of the mounting groove to block the road, and it can also retract into the mounting groove to allow passage. When describing the upper side, lower side, top, and bottom of the same component, the terms indicating the direction or positional relationship, such as upper side, lower side, top, and bottom, should be referenced to the bottom of the mounting groove. Therefore, the upper side of the component faces away from the bottom of the groove, the lower side of the component faces the bottom of the groove, and the top of the component is farther away from the bottom of the groove than its bottom. Of course, when the rising bollard is placed on the ground, the terms indicating the direction or positional relationship, such as upper side, lower side, top, and bottom, should be referenced to the ground.

[0041] Please see Figures 1 to 5 , Figure 1 This is a state diagram of the lifting column 100 after it has been lowered into position according to one embodiment of the present invention. Figure 2 yes Figure 1 The diagram shown represents another state after the lifting column 100 has risen to its designated position. Figure 3 yes Figure 1 The sectional view of the lifting column 100 shown along the AA direction. Figure 4 yes Figure 2 The sectional view of the lifting column 100 shown along the BB direction. Figure 5 yes Figure 1 The exploded view of the lifting column 100 shown in this embodiment of the invention provides a lifting column 100, which includes a cylindrical assembly 10, a first transmission mechanism 20, a second transmission mechanism 30, and a drive mechanism 40. The cylindrical assembly 10 includes a first cylindrical body 11, a second cylindrical body 12, and a third cylindrical body 13, which are sequentially slidably connected. The first transmission mechanism 20 includes a first screw 21 and a gear nut 22. One end of the first screw 21 is fixedly supported on the first cylindrical body 11, and the gear nut 22 is threadedly connected to the first screw 21 and connected to the second cylindrical body 12. The second transmission mechanism 30 includes a second screw 31, a driven gear 32, and a connecting nut 33. One end of the second screw 31 is rotatably connected to the second cylinder 12. The driven gear 32 is sleeved on the outside of the second screw 31 and fixed to it. The connecting nut 33 is threadedly connected to the second screw 31 and connected to the third cylinder 13. The second screw 31 has a receiving cavity 311, and the other end of the first screw 21 can extend into the receiving cavity 311. The drive mechanism 40 is connected to the gear nut 22 and the driven gear 32 and can drive the gear nut 22 and the driven gear 32 to rotate respectively, so that the gear nut 22 moves up and down synchronously along the first screw 21 and the connecting nut 33 moves up and down synchronously along the second screw 31.

[0042] Specifically, when the gear nut 22 descends along the first screw 21 and the connecting nut 33 descends synchronously along the second screw 31, the second cylinder 12 and the third cylinder 13 descend relative to the first cylinder 11 with the gear nut 22, and simultaneously, the third cylinder 13 descends relative to the second cylinder 12 with the connecting nut 33, until the second cylinder 12 and the third cylinder 13 reach their positions. Figure 1 and Figure 3 As shown; when the gear nut 22 rises along the first screw 21 and the connecting nut 33 rises synchronously along the second screw 31, the second cylinder 12 and the third cylinder 13 rise relative to the first cylinder 11 with the gear nut 22, and simultaneously, the third cylinder 13 rises relative to the second cylinder 12 with the connecting nut 33, until the second cylinder 12 and the third cylinder 13 reach their positions. Figure 2 and Figure 4 As shown. The external threads of the first screw 21 and the second screw 31 can be in the same or opposite directions. Correspondingly, the rotation directions of the gear nut 22 and the driven gear 32 driven by the drive mechanism 40 can be opposite or the same. As long as the gear nut 22 rotates around the first screw 21 and the driven gear 32 drives the second screw 31 to rotate around the axis of the second screw 31, the gear nut 22 can move up and down synchronously along the first screw 21 and the connecting nut 33 can move up and down synchronously along the second screw 31.

[0043] It should be noted that the second cylinder 12 and the third cylinder 13 are connected by the second transmission mechanism 30, so that when the first transmission mechanism 20 drives the second cylinder 12 to rise and fall, the third cylinder 13 can rise and fall with the second cylinder 12 under the connection of the second transmission mechanism 30. In addition, while the third cylinder 13 rises and falls with the second cylinder 12, the third cylinder 13 can also rise and fall relative to the second cylinder 12 under the driving action of the second transmission mechanism 30.

[0044] Compared to the traditional single-section lifting column 100 (which only has a single movable and telescopic cylinder), the lifting column 100 of this embodiment has a movable and telescopic second cylinder 12 and a third cylinder 13. Under the condition of the same lifting height, the telescopic rate of the lifting column 100 is improved, and the overall height of the lifting column 100 after it is lowered into place is reduced. This reduces the excavation depth of the ground during installation, making on-site installation easier and saving time and effort. In addition, the screw of the traditional single-section lifting column 100 is relatively long, and its straightness requirement during processing is also correspondingly high. However, in this embodiment, by dividing the screw into a first screw 21 and a second screw 31, the length of a single screw is reduced while ensuring the extension length of the lifting column 100, thus reducing the processing difficulty of each screw.

[0045] In this embodiment of the invention, the drive mechanism 40 synchronously drives the gear nut 22 and the driven gear 32 to rotate, so that the gear nut 22 moves up and down synchronously along the first screw 21 and the connecting nut 33 moves up and down synchronously along the second screw 31. At the same time, the gear nut 22 drives the second cylinder 12 and the third cylinder 13 to move up and down synchronously relative to the first cylinder 11, and the connecting nut 33 drives the third cylinder 13 to move up and down synchronously relative to the second cylinder 12. This allows the second cylinder 12 and the third cylinder 13 to move up and down synchronously to their positions during the lifting process. Moreover, under the condition that the movable and telescopic second cylinder 12 and the third cylinder 13 have the same rising height, the stroke of a single cylinder is shorter, which shortens the time for the lifting column 100 to rise and fall to its position, so that the lifting column 100 can quickly rise and fall to its position. Furthermore, the second screw 31 is provided with a receiving cavity 311, and the other end of the first screw 21 can extend into the receiving cavity 311. During the process of the gear nut 22 driving the second cylinder 12 and the second cylinder 12 driving the second screw 31 to descend together, the other end of the first screw 21 can extend into the receiving cavity 311 of the second screw 31, which avoids the second screw 31 from interfering with the first screw 21 when it rises and falls with the second cylinder 12. This allows the axes of the first screw 21 and the second screw 31 to coincide or approximately coincide, so that the first transmission mechanism 20 and the second transmission mechanism 30 can bear or apply thrust to the corresponding cylinder on the same axis or approximately on the same axis, thereby making the lifting column 100 subjected to balanced force and run smoothly during the lifting process.

[0046] Furthermore, the drive mechanism 40 is installed on the second cylinder 12. When the drive mechanism 40 drives the gear nut 22 to rotate around the first screw 21 and rise and fall along the first screw 21, the gear nut 22 drives the second cylinder 12, and the second cylinder 12 drives the second transmission mechanism 30 and the drive mechanism 40 to rise and fall together. This avoids deviations in the fit between the drive mechanism 40, the gear nut 22, and the driven gear 32, and ensures the synchronous displacement of the second transmission mechanism 30, the drive mechanism 40, and the gear nut 22 relative to the first screw 21, thus ensuring the overall stable operation of the lifting column 100.

[0047] Compared to traditional hydraulic or pneumatic lifting columns 100, the lifting column 100 of this embodiment uses a combination of screw and nut as the transmission mechanism, which avoids the pressure holding problem of hydraulic or pneumatic lifting columns 100, as well as the problem of hydraulic oil freezing in cold regions causing the product to malfunction. In addition, the lifting column 100 of this embodiment has lower mechanical assembly space requirements and is easier to install.

[0048] like Figures 3 to 5As shown, in some embodiments, the first cylinder 11, the second cylinder 12, and the third cylinder 13 are all generally cylindrical, with the inner diameters of the first cylinder 11, the second cylinder 12, and the third cylinder 13 decreasing sequentially. The second cylinder 12 is fitted inside the first cylinder 11, and the third cylinder 13 is fitted inside the second cylinder 12. The second cylinder 12 can slide along its own axis within the first cylinder 11 to achieve lifting and lowering, thereby extending out of the first cylinder 11 or being completely contained within the first cylinder 11. The third cylinder 13 can slide along its own axis within the second cylinder 12 to achieve lifting and lowering, thereby extending out of the second cylinder 12 or being completely contained within the second cylinder 12.

[0049] In some other embodiments, the inner diameter of the first cylinder 11 is larger than that of the second cylinder 12 and the third cylinder 13, the inner diameter of the third cylinder 13 is larger than that of the second cylinder 12, the third cylinder 13 is fitted inside the first cylinder 11, and the second cylinder 12 is fitted inside the third cylinder 13.

[0050] Optionally, the axes of the first cylinder 11, the second cylinder 12, and the third cylinder 13 coincide.

[0051] In some embodiments, the first cylinder 11 serves as a fixed end buried underground, comprising an outer cylinder sidewall 111, an outer cylinder base 112, and an outer cylinder top cover 113. The outer cylinder sidewall 111 is a hollow cylinder. The outer cylinder base 112 is installed at one end of the outer cylinder sidewall 111 and covers that end. The outer cylinder top cover 113 is installed at the other end of the outer cylinder sidewall 111 away from the outer cylinder base 112. During installation, the outer cylinder top cover 113 is closer to the ground than the outer cylinder base 112. The second cylinder 12 and the third cylinder 13 can extend out of the outer cylinder top cover 113. The outer cylinder top cover 113 is used to limit the displacement of the second cylinder 12 relative to the first cylinder 11, preventing the second cylinder 12 from completely sliding out of the first cylinder 11.

[0052] The second cylinder 12 includes a middle cylinder side wall 121, a middle cylinder base 122, and a middle cylinder top cover 123. The middle cylinder side wall 121 is a hollow cylinder and is fitted inside the outer cylinder side wall 111. The middle cylinder base 122 is installed at one end of the middle cylinder side wall 121 and covers that end. The middle cylinder top cover 123 is installed at the other end of the middle cylinder side wall 121 away from the middle cylinder base 122. The middle cylinder top cover 123 is farther away from the outer cylinder base 112 than the middle cylinder base 122. The third cylinder 13 can extend out of the middle cylinder top cover 123. The middle cylinder top cover 123 is used to limit the displacement of the third cylinder 13 relative to the second cylinder 12 and prevent the third cylinder 13 from completely sliding out of the second cylinder 12.

[0053] The third cylinder 13 includes an inner cylinder sidewall 131 and an inner cylinder top plate 132. The inner cylinder sidewall 131 is a hollow cylinder and is fitted inside the middle cylinder sidewall 121. The inner cylinder top plate 132 is installed on the end of the inner cylinder sidewall 131 away from the middle cylinder base 122 and covers that end. The inner cylinder top plate 132 is opposite to the middle cylinder base 122.

[0054] It is understood that in some other embodiments, the first cylinder 11, the second cylinder 12, and the third cylinder 13 are not limited to the structure described above. The first cylinder 11, the second cylinder 12, and the third cylinder 13 may also be other shapes. For example, the first cylinder 11, the second cylinder 12, and the third cylinder 13 are all generally square columnar.

[0055] In some other embodiments, the first cylinder 11 may be omitted.

[0056] In some embodiments, the cylinder assembly further includes a support base 14, which is supported at the bottom of the first cylinder 11, and the second cylinder 12, the third cylinder 13, the first transmission mechanism 20, the second transmission mechanism 30, and the drive mechanism 40 are all supported on the support base 14.

[0057] The support base 14 includes a base plate 141 and a surrounding plate 142. The surrounding plate 142 is arranged around the base plate 141 along the edge of the base plate 141 and is fixedly connected to the base plate 141. The surrounding plate 142 is provided with a receiving groove 1401.

[0058] It should be noted that the middle cylinder base 122 is located between the third cylinder 13 and the support seat 14. When the lifting column 100 descends to its final position, the upper side of the middle cylinder base 122 abuts against one end of the third cylinder 13, and the lower side of the middle cylinder base 122 abuts against the support seat 14. Therefore, to prevent a hard collision inside the lifting column 100 when it descends to its final position, the middle cylinder base 122 is made of an elastic material. This gives the middle cylinder base 122 an elastic buffering effect, allowing it to buffer the second cylinder 12 and the support seat 14 when the second cylinder 12 and the third cylinder 13 descend to their final positions, preventing deformation caused by a hard collision between the cylinders. The elastic material can be plastic.

[0059] In some other embodiments, the support base 14 may be omitted, the second cylinder 12 is connected to the outer cylinder base 112 of the first cylinder 11, and the second cylinder 12, the third cylinder 13, the first transmission mechanism 20 and the second transmission mechanism 30 are all supported on the outer cylinder base 112.

[0060] In some embodiments, the drive mechanism 40 includes a drive motor 41 and a driving bevel gear 42, the driving bevel gear 42 being connected to the output shaft of the drive motor 41. The gear nut 22 has a first bevel tooth portion 221, and the driven gear 32 has a second bevel tooth portion 321. The first bevel tooth portion 221 and the second bevel tooth portion 321 are opposite to each other, and the first bevel tooth portion 221 and the second bevel tooth portion 321 respectively mesh with the driving bevel gear 42. With this configuration, when the drive motor 41 drives the driving bevel gear 42 to rotate, the gear nut 22 and the driven gear 32 can rotate in opposite directions, realizing that a single drive motor 41 can simultaneously drive the lifting of the second cylinder 12 and the third cylinder 13. This reduces the number of motors required to drive the lifting column 100, resulting in higher stability and a lower failure rate for the lifting column 100. It eliminates the need for complex circuits, wiring, and control logic, simplifying the drive system of the lifting column 100. Its structure is simple, compact, easy to implement, and has low production and maintenance costs. The external threads of the first screw 21 and the second screw 31 have the same direction of rotation; the output shaft of the drive motor 41 and the axis of the driving bevel gear 42 coincide; the axes of the gear nut 22 and the driven gear 32 coincide; and the axes of the gear nut 22 and the driven gear 32 are both perpendicular to the axis of the driving bevel gear 42.

[0061] In some other embodiments, the drive mechanism 40 may also be other mechanisms capable of driving the gear nut 22 and the driven gear 32 to rotate respectively. For example, the drive mechanism 40 includes a first motor, a first gear, a second motor and a second gear. The first motor and the second motor are respectively mounted on the second cylinder 12. The first gear and the second gear are respectively connected to the output shafts of the first motor and the second gear, and the first gear and the second gear mesh with the gear nut 22 and the driven gear 32 respectively. The first motor and the second motor can drive the gear nut 22 and the driven gear 32 to rotate respectively through the first gear and the second gear.

[0062] It is understandable that when the threads of the first screw 21 and the second screw 31 are opposite in direction, a connecting bevel gear can be provided between the driving bevel gear 42 and the gear nut 22, or between the driving bevel gear 42 and the driven gear 32. The connecting bevel gear meshes with the driving bevel gear 42 and the gear nut 22, or meshes with the driving bevel gear 42 and the driven gear 32, so that when the drive motor 41 drives the driving bevel gear 42 to rotate, the gear nut 22 and the driven gear 32 can rotate in the same direction. In this way, the gear nut 22 can be raised and lowered synchronously along the first screw 21 and the driven gear 32 along the second screw 31.

[0063] In some embodiments, the second cylinder includes a middle cylinder base 122, a gear nut 22 and a driven gear 32 respectively disposed on opposite sides of the middle cylinder base 122, with the gear nut 22 closer to the bottom of the first cylinder 11 than the driven gear 32. The gear nut 22 abuts against the middle cylinder base 122, a drive motor 41 is mounted on the middle cylinder base 122, and a driving bevel gear 42 passes through the middle cylinder base 122 and meshes with the gear nut 22 and the driven gear 32. The gear nut 22 abuts against the middle cylinder base 122 so that it can push the second cylinder 12 upward when rising along the first screw 21, or allow the second cylinder 12 to descend under its own weight. This structure is simple and easy to implement, eliminating the need for additional structures to connect the gear nut 22 and the second cylinder 12. When the second cylinder 12 descends to its position, the middle cylinder base 122 of the second cylinder 12 abuts against the surrounding plate 142 of the support base 14. The gear nut 22, the active bevel gear 42 and the drive motor 41 are housed in the receiving groove 1401 of the support base 14, thereby preventing the gear nut 22, the active bevel gear 42 and the drive motor 41 from colliding with the bottom of the lifting column 100.

[0064] It is understandable that, since the gear nut 22 will generate friction on the middle cylinder base 122 during its rotation around the first screw 21, and the gear nut 22 has a load-bearing function on components such as the second cylinder 12, long-term friction will cause the friction area of ​​the middle cylinder base 122 to gradually thin, affecting the support of the gear nut 22 for the second cylinder 12. Therefore, in some embodiments, the first transmission mechanism 20 also includes an anti-wear component, which is disposed between the middle cylinder base 122 and the gear nut 22. The anti-wear component is used to prevent wear between the middle cylinder base 122 and the gear nut 22, reducing or avoiding friction between the gear nut 22 and the middle cylinder base 122 during rotation, thereby ensuring the service life of the middle cylinder base 122.

[0065] In some embodiments, the wear-resistant component is a thrust bearing, which is sleeved on the outside of the first screw 21, with one end face of the thrust bearing abutting against the middle cylinder base 122 and the other end face of the thrust bearing abutting against the gear nut 22.

[0066] In some other embodiments, the anti-wear component can also be other devices that can play an anti-wear role. For example, the anti-wear component is a bushing with a smooth end face, or the anti-wear component is an abutment protrusion provided on the middle cylinder base 122. The abutment protrusion protrudes from the middle cylinder base 122 toward the gear nut 22, thereby increasing the thickness at the contact point between the middle cylinder base 122 and the gear nut 22 and reducing the impact of the gear nut 22 on the friction of the middle cylinder base 122.

[0067] Please refer to the following: Figure 6 , Figure 6 yes Figure 3The enlarged view of part C of the lifting column 100 shown in the figure shows that in some embodiments, the first screw 21 is clearance-fitted with the inner wall of the accommodating cavity 311, thereby reducing the sliding friction between the first screw 21 and the inner wall of the accommodating cavity 311, so that the first screw 21 can slide smoothly within the second screw 31.

[0068] It should be noted that the first screw 21 is prone to severe vibration during high-speed operation within the accommodating cavity 311, affecting the stable operation of the lifting column 100. Therefore, the first transmission mechanism 20 also includes a first anti-vibration sleeve 23, which is installed at the other end of the first screw 21. The outer wall of the first anti-vibration sleeve 23 is provided with a first protruding edge, which abuts against the inner wall of the accommodating cavity 311. This reduces the contact area between the anti-vibration sleeve and the inner wall of the accommodating cavity 311, thereby reducing the friction between the anti-vibration sleeve 23 and the inner wall of the accommodating cavity 311. While reducing sliding friction, this prevents the first screw 21 from vibrating, allowing it to slide smoothly along the inner wall of the accommodating cavity 311, thus ensuring the stable operation of the lifting column 100.

[0069] In some embodiments, the second transmission mechanism 30 further includes a connecting pipe 34, one end of which is fixed to a connecting nut 33, and the other end of which is connected to the top of the third cylinder 13. The connecting pipe 34 is provided with a pipe 341, and the other end of the second screw 31 can extend into the pipe 341. With the above arrangement, while realizing the connection between the connecting nut 33 and the third cylinder 13, the connecting nut 33 can provide good support for the third cylinder 13 as a whole through the connecting pipe 34. During the process of the connecting pipe 34 driving the third cylinder 13 to descend, the other end of the second screw 31 can extend into the pipe 341 of the connecting pipe 34, avoiding motion interference between the connecting pipe 34 and the second screw 31 when they rise and fall. This allows the axes of the second screw 31 and the connecting pipe 34 to coincide or approximately coincide, so that the second screw 31 and the connecting pipe 34 can bear or apply thrust to the third cylinder 13 on the same axis or approximately on the same axis, further ensuring that the lifting column 100 is subjected to balanced force and runs smoothly during the lifting process.

[0070] Specifically, the other end of the connecting pipe 34 is fixed to the inner top plate 132 of the third cylinder 13.

[0071] In some other embodiments, the connecting pipe 34 may be omitted, and the connecting nut 33 may also be connected to the third cylinder 13 in other ways. For example, the outer peripheral sidewall of the connecting nut 33 extends toward the inner wall of the third cylinder 13 and is fixed to the inner wall of the third cylinder 13. Alternatively, the third cylinder 13 may be provided with an inner cylinder base, and the connecting nut 33 may be fixed to the inner cylinder base, wherein the second screw 31 may pass through the inner cylinder base.

[0072] like Figure 6As shown, in some embodiments, the second screw 31 is clearance-fitted with the inner wall of the pipe 341, thereby reducing the sliding friction between the second screw 31 and the inner wall of the pipe 341, so that the second screw 31 can slide smoothly in the connecting pipe 34.

[0073] It should be noted that the second screw 31 is prone to severe vibration during high-speed operation within the pipe 341, affecting the stable operation of the lifting column 100. Therefore, the second transmission mechanism 30 also includes a second anti-vibration sleeve 35, which is installed at the other end of the second screw 31. The outer wall of the second anti-vibration sleeve 35 is provided with a second protruding edge, which abuts against the inner wall of the pipe 341. This reduces the contact area between the second anti-vibration sleeve and the inner wall of the pipe 341, thereby reducing the friction between the second anti-vibration sleeve 35 and the inner wall of the pipe 341. While reducing sliding friction, this prevents vibration of the second screw 31, allowing it to slide smoothly along the inner wall of the pipe 341 and ensuring the stable operation of the lifting column 100.

[0074] In some embodiments, the axes of the first screw 21, the second screw 31, the connecting pipe 34, the first cylinder 11, the second cylinder 12, and the third cylinder 13 are coincident. This allows the gear nut 22 on the first screw 21 and the driven gear 32 on the second screw 31 to bear loads or apply thrust to the second cylinder 12 and the third cylinder 13 respectively on the same axis. This ensures that the lifting column 100 is subjected to balanced forces and runs smoothly during the lifting process, further guaranteeing that the lifting column 100 is subjected to balanced forces and runs smoothly during the lifting process.

[0075] Please continue reading. Figures 3 to 5 In some embodiments, the lifting column 100 further includes a first guide mechanism 50 and a second guide mechanism 60. The first guide mechanism 50 connects the first cylinder 11 and the second cylinder 12, and guides the second cylinder 12 so that the second cylinder 12 can rise and fall along its own axis. The second guide mechanism 60 connects the second cylinder 12 and the third cylinder 13, and guides the third cylinder 13 so that the third cylinder 13 can rise and fall along its own axis. In this way, the overall stable operation of the lifting column 100 is ensured.

[0076] In some embodiments, the first guide mechanism 50 connects the aforementioned support base 14 and the second cylinder 12. The second cylinder 12, the third cylinder 13, the first transmission mechanism 20, the second transmission mechanism 30, the drive mechanism 40, the first guide mechanism 50, and the second guide mechanism 60 are all supported on the support base 14. The support base 14, the second cylinder 12, the third cylinder 13, the first transmission mechanism 20, the second transmission mechanism 30, the first guide mechanism 50, and the second guide mechanism 60 are assembled to form the core of the lifting column 100. This core is a single assembly, facilitating subsequent disassembly and assembly within the first cylinder 11. During use, the first cylinder 11 is buried underground. When any parts inside the lifting column 100 are damaged, maintenance personnel only need to remove the outer cylinder cover 113 from the outer cylinder side wall 111 and then pull the core out from the outer cylinder side wall 111 to replace the corresponding parts. There is no need to excavate the ground to remove the entire product, greatly saving maintenance labor and costs.

[0077] like Figure 5 As shown, in some embodiments, the first guiding mechanism 50 includes a guide rod 51 and at least two first guide blocks 52. The guide rod 51 is arranged along an axial direction parallel to the first cylinder 11 and fixed to the first cylinder 11. The at least two first guide blocks 52 are arranged at intervals along the axial direction of the second cylinder 12 and fixed to the second cylinder 12. Each first guide block 52 abuts against the inner wall of the first cylinder 11, and each first guide block 52 is provided with a corresponding guide hole 521. The guide rod 51 passes through the guide hole 521. With the above arrangement, the second cylinder 12 can be raised and lowered along the guide rod 51 by the first guide blocks 52, thereby realizing the guiding function of the second cylinder 12. Furthermore, the abutment between each first guide block 52 and the inner wall of the first cylinder 11 can provide radial limiting for the second cylinder 12, preventing radial swaying of the second cylinder 12 during the raising and lowering process relative to the first cylinder 11, improving the ability of the second cylinder 12 to resist external collisions, and ensuring the stable operation of the second cylinder 12. In addition, the cooperation between the guide rod 51 and the first guide block 52 can restrict the rotation of the second cylinder 12 relative to the first cylinder 11, preventing the second cylinder 12 from rotating when the gear nut 22 rotates.

[0078] The second guiding mechanism 60 includes at least two second guiding blocks 61, which are spaced apart along the axial direction of the third cylinder 13 and fixed to the third cylinder 13. Each second guiding block 61 abuts against the inner wall of the second cylinder 12. Through this arrangement, the third cylinder 13 can move up and down along the inner wall of the second cylinder 12 via the second guiding blocks 61, thereby guiding the third cylinder 13. Furthermore, the abutment between each second guiding block 61 and the inner wall of the second cylinder 12 provides radial limiting for the third cylinder 13, preventing radial swaying during its movement relative to the second cylinder 12. This improves the third cylinder 13's resistance to external impacts and ensures stable operation. In addition, the inner walls of the second guide blocks 61 and the second cylinder 12 abut against each other, so that there is a certain friction between the inner walls of the second guide blocks 61 and the second cylinder 12. This friction can restrict the rotation of the third cylinder 13 relative to the second cylinder 12, and prevent the third cylinder 13 from rotating through the connecting nut 33 when the second screw 31 rotates.

[0079] To enable the second cylinder 12 to slide smoothly within the first cylinder 11, and the third cylinder 13 to slide smoothly within the second cylinder 12, in some embodiments, the outer wall of the first guide block 52 is provided with a third protruding edge 522, which abuts against the inner wall of the first cylinder 11. This reduces the contact area between the first guide block 52 and the inner wall of the first cylinder 11, thereby reducing the friction between the first guide block 52 and the inner wall of the first cylinder 11, allowing the second cylinder 12 to slide smoothly within the first cylinder 11. The outer wall of the second guide block 61 is provided with a fourth protruding edge 611, which abuts against the inner wall of the second cylinder 12. This reduces the contact area between the second guide block 61 and the inner wall of the second cylinder 12, thereby reducing the friction between the second guide block 61 and the inner wall of the second cylinder 12, allowing the third cylinder 13 to slide smoothly within the second cylinder 12.

[0080] Specifically, there are at least two guide rods 51, one end of which is fixed to the support base 14, and the other end of which passes through the corresponding guide hole 521. In this way, the second cylinder 12, the third cylinder 13, the first transmission mechanism 20, the second transmission mechanism 30, the drive mechanism 40, the first guide mechanism 50, and the second guide mechanism 60 are all supported on the support base 14, thus assembling the mechanism of the lifting column 100.

[0081] There are two first guide blocks 52 and two second guide blocks 61. The first guide block 52 can extend circumferentially along the outer cylinder sidewall 1111 to form a closed ring, or it can extend circumferentially along the outer cylinder sidewall 1111 to form an open ring. At least three third protruding edges 522 are evenly spaced along the circumference of the first guide block 52. The second guide block 61 can extend circumferentially along the middle cylinder sidewall 121 to form a closed ring, or it can extend circumferentially along the middle cylinder sidewall 121 to form an open ring. At least three fourth protruding edges 611 are evenly spaced along the circumference of the second guide block 61.

[0082] A first guide block 52 is disposed on the outer edge of the middle cylinder base 122 and is integral with the middle cylinder base 122. This first guide block 52 is opposite to the surrounding plate 142 of the support base 14. Another first guide block 52 is fixed to the outer wall of the middle cylinder side wall 121 and is opposite to the outer cylinder top cover 1113. After the second cylinder 12 rises to its position, the other first guide block 52 abuts against the outer cylinder top cover 1113, thereby restricting the rising position of the second cylinder 12. Figure 4 As shown; after the second cylinder 12 descends to its position, the first guide block 52 abuts against the surrounding plate 142 of the support base 14, thereby limiting the descent position of the second cylinder 12, as shown. Figure 3 As shown.

[0083] A second guide block 61 is fixed to the outer wall of one end of the inner cylinder sidewall 131, and this second guide block 61 is opposite to the middle cylinder base 122. Another second guide block 61 is spaced apart from the first second guide block 61, and this other second guide block 61 is opposite to the middle cylinder top cover 123. After the third cylinder 13 rises to its position, the other second guide block 61 abuts against the middle cylinder top cover 123, thereby restricting the rising position of the third cylinder 13. Figure 4 As shown; after the third cylinder 13 descends to its position, one end face of the inner cylinder sidewall 131 abuts against the middle cylinder base 122, thereby restricting the descent position of the third cylinder 13, as shown. Figure 3 As shown.

[0084] Both the first guide block 52 and the second guide block 61 are made of elastic material, thus providing elastic cushioning. This allows the first guide block 52 and the second guide block 61 to provide axial cushioning for the second cylinder 12 and the third cylinder 13 respectively when the lifting column 100 rises to the point where the first guide block 52 abuts against the outer cylinder cover 1113 and the second guide block 61 abuts against the middle cylinder cover 123. This prevents hard collisions between the cylinders and deformation when the column is fully raised. Furthermore, the first guide block 52 also provides radial cushioning between the inner wall of the first cylinder 11 and the second cylinder 12, and the second guide block 61 also provides radial cushioning between the inner wall of the second cylinder 12 and the third cylinder 13, improving the cylinder assembly 10's resistance to external impacts. The elastic material can be plastic.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; under the concept of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the present invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rising bollard, characterized in that, include: A cylindrical assembly includes a first cylindrical body, a second cylindrical body, and a third cylindrical body, wherein the first cylindrical body, the second cylindrical body, and the third cylindrical body are slidably connected in sequence, and the second cylindrical body includes a middle cylindrical base. The first transmission mechanism includes a first screw and a gear nut. One end of the first screw is fixedly supported on the first cylinder. The gear nut is threadedly connected to the first screw and connected to the second cylinder. The second transmission mechanism includes a second screw, a driven gear, and a connecting nut. One end of the second screw is rotatably connected to the second cylinder. The driven gear is sleeved on the outside of the second screw and fixed to it. The connecting nut is threadedly connected to the second screw and connected to the third cylinder. The second screw has a receiving cavity, and the other end of the first screw can extend into the receiving cavity. The gear nut and the driven gear are respectively located on opposite sides of the middle cylinder base, and the gear nut is closer to the bottom of the first cylinder than the driven gear. The gear nut abuts against the middle cylinder base. A drive mechanism is installed on the second cylinder. The drive mechanism is connected to the gear nut and the driven gear and can drive the gear nut and the driven gear to rotate respectively, so that the gear nut moves up and down synchronously along the first screw and the connecting nut moves up and down synchronously along the second screw. The drive mechanism includes a drive motor and a driving bevel gear. The driving bevel gear is connected to the output shaft of the drive motor. The gear nut has a first bevel tooth portion and the driven gear has a second bevel tooth portion. The first bevel tooth portion and the second bevel tooth portion are opposite to each other and respectively mesh with the driving bevel gear. The second transmission mechanism also includes a connecting pipe, one end of which is fixed to the connecting nut, and the other end of which is connected to the top of the third cylinder. The connecting pipe is provided with a conduit, and the other end of the second screw can extend into the conduit.

2. The lifting column according to claim 1, characterized in that, The drive motor is mounted on the middle cylinder base, and the driving bevel gear passes through the middle cylinder base and meshes with the gear nut and the driven gear.

3. The lifting column according to claim 2, characterized in that, The first transmission mechanism also includes an anti-wear component, which is disposed between the middle cylinder base and the gear nut.

4. The lifting column according to claim 1, characterized in that, The first screw is clearance-fitted with the inner wall of the accommodating cavity; The first transmission mechanism further includes a first anti-vibration sleeve, which is installed at the other end of the first screw. The outer side wall of the first anti-vibration sleeve is provided with a first protruding edge, which abuts against the inner wall of the accommodating cavity.

5. The lifting column according to claim 1, characterized in that, The second screw is clearance-fitted with the inner wall of the pipe; The second transmission mechanism further includes a second anti-vibration sleeve, which is installed at the other end of the second screw. The outer side wall of the second anti-vibration sleeve is provided with a second protruding edge, which abuts against the inner wall of the pipe.

6. The lifting column according to claim 1, characterized in that, Also includes: A first guiding mechanism is disposed between the first cylinder and the second cylinder and serves to guide the second cylinder; A second guiding mechanism is disposed between the second cylinder and the third cylinder and serves to guide the third cylinder.

7. The lifting column according to claim 6, characterized in that, The first guiding mechanism includes a guide rod and at least two first guide blocks. The guide rod is arranged along an axial direction parallel to the first cylinder and fixed to the first cylinder. The at least two first guide blocks are arranged at intervals along the axial direction of the second cylinder and fixed to the second cylinder. Each first guide block abuts against the inner wall of the first cylinder. Each first guide block is provided with a corresponding guide hole, and the guide rod passes through the guide hole. The second guiding mechanism includes at least two second guiding blocks, which are spaced apart along the axial direction of the third cylinder and fixed to the third cylinder, with each second guiding block abutting against the inner wall of the second cylinder.

8. The lifting column according to claim 6 or 7, characterized in that, The cylindrical assembly further includes a support base, which is supported at the bottom of the first cylindrical body. The first guide mechanism connects the support base and the second cylindrical body. One end of the first screw is fixed to the support base. The second cylindrical body, the third cylindrical body, the first transmission mechanism, the second transmission mechanism, the drive mechanism, the first guide mechanism, and the second guide mechanism are all supported on the support base.

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