Rising bollards and maintenance platforms

Abstract

This utility model discloses a lifting column and maintenance platform, relating to the field of bicycle maintenance platforms. Key technical features include a first tube, a second tube sleeved on the first tube, and a drive mechanism. The drive mechanism includes a drive motor installed inside the lifting column. The bottom end of the first tube has a first rolling guide assembly contacting the inner wall of the second tube, and the top end of the second tube has a second rolling guide assembly contacting the outer side of the first tube. This utility model uses a drive motor for electric lifting, facilitating operation. The rolling guide assembly not only guides and limits movement but also transmits driving force and shortens the force transmission path, further improving the stability of the tube movement. Separating the controller from the power adapter and mounting the controller on the lifting column enhances safety during use.

Description

Technical Field

[0001] This utility model relates to the field of bicycle maintenance platforms, and more specifically, it relates to a lifting column and maintenance platform. Background Technology

[0002] A Taiwanese patent with authorization publication number TWM525826U discloses a bicycle repair rack, which includes a lifting column, a connector, and a clamp. The lifting column uses a quick-release assembly for clamping, and the connector uses a separable ratchet part for circumferential adjustment and limiting; the clamp includes a fixed base, a movable clamp, a cantilever, a fixed clamp, a handle, a pull rod, and a spring.

[0003] However, the automatic vehicle maintenance rack in the aforementioned patent still has the following problems: the lifting and adjusting operation of the lifting column is inconvenient, and its stability needs to be improved. Utility Model Content

[0004] In view of the shortcomings of the existing technology, one of the objectives of this utility model is to provide a lifting column that uses a drive motor to achieve electric lifting, which is convenient to operate; and uses a rolling guide component, which not only plays a guiding and limiting role, but also transmits driving force and shortens the force transmission path, thus further improving the stability of the pipe movement.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A lifting column includes a first tube, a second tube sleeved on the first tube, and a drive mechanism, wherein the drive mechanism includes a drive motor installed inside the lifting column. The bottom end of the first tube is provided with a first rolling guide assembly that contacts the inner wall of the second tube, and the top end of the second tube is provided with a second rolling guide assembly that contacts the outer side of the first tube.

[0006] Furthermore, the lifting column also includes an absolute encoder and a controller; the drive motor includes a current acquisition module; and the controller includes an encoder position analysis module, a current detection module, and a stall detection module.

[0007] Furthermore, the lifting column also includes a controller connected to the drive motor, and a power adapter arranged separately from the controller.

[0008] Furthermore, the first rolling guide assembly includes a first guide seat and first rollers respectively disposed on the sidewalls of the first guide seat; wherein the first rollers of two adjacent sidewalls are staggered along the length direction of the first tube.

[0009] Furthermore, the lifting column also includes a first screw rod disposed in the second tube, and a first threaded sleeve disposed between the first screw rod and the first rolling guide assembly.

[0010] Furthermore, the lifting column also includes a third tube sleeved on the second tube, the bottom end of the second tube is provided with a third rolling guide assembly that contacts the inner wall of the third tube, and the top end of the third tube is provided with a fourth rolling guide assembly that contacts the outer side of the second tube.

[0011] Furthermore, the lifting column also includes a second screw disposed in the third tube; the first screw has a movable cavity that cooperates with the second screw, and the bottom end of the first screw has a second threaded sleeve that cooperates with the second screw; a bearing is disposed between the first screw and the third rolling guide assembly, such that the second threaded sleeve is located inside the third rolling guide assembly.

[0012] Furthermore, a coupling is provided between the drive motor and the second screw.

[0013] Another objective of this utility model is to provide a maintenance platform, which includes the aforementioned lifting column.

[0014] Furthermore, the maintenance platform also includes a clamp mounted on the lifting column.

[0015] In summary, this utility model has the following beneficial effects: 1. The first rolling guide component is located at the bottom end of the first tube, and the second rolling guide component is located at the top end of the second tube. This can effectively improve the stability and smoothness of the movement of the first tube relative to the second tube. 2. The first and third rolling guide components not only serve as guides and limiters, but also transmit driving force and shorten the force transmission path, which further improves the stability of pipe movement. 3. Separate the controller from the power adapter and install the controller on the lifting column. This will improve the safety of use. 4. The controller uses the real-time position information of the absolute encoder to perform soft limit control based on the preset soft limit position and current stall threshold, and performs limit protection when the stall current reaches the set threshold, thereby effectively avoiding mechanical impact. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the lifting column in Example 1. Figure 1 ; Figure 2 This is a schematic diagram of the lifting column in Example 1. Figure 2 ; Figure 3 This is a schematic diagram of the lifting column in Example 1. Figure 3 ; Figure 4 This is a schematic diagram of the lifting column in Example 1. Figure 4 ; Figure 5 This is a schematic diagram of the lifting column in Example 1. Figure 5 ; Figure 6 This is a schematic diagram of the lifting column in Example 1. Figure 6 ; Figure 7 This is a schematic diagram of the maintenance platform in Example 2.

[0017] In the diagram: 1. Clamping plate assembly; 2. Clamping assembly; 3. Fixing rod; 4. Worm gearbox; 5. Support frame; 61. First tube; 62. Second tube; 63. Third tube; 7. Base; 81. First rolling guide assembly; 811. First guide seat; 812. First roller; 82. Second rolling guide assembly; 821. Second guide seat; 822. Second roller; 83. Third rolling guide assembly; 84. Fourth rolling guide assembly; 91. First screw; 911. Limit nut; 92. First threaded sleeve; 93. Second screw; 931. Limit sleeve; 94. Second threaded sleeve; 991. Bearing seat; 992. Fixing seat; 993. Drive motor; 994. Coupling; 995. Controller; 996. Power adapter. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings.

[0019] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law. Example 1:

[0020] A type of rising bollard, as shown in the reference Figures 1 to 6 The lifting column is used as a maintenance platform for bicycles. In order to improve the scope of use of bicycles, facilitate maintenance, and facilitate transportation and storage, the lifting column is preferably arranged in two or three sections. Specifically, the lifting column in this embodiment adopts a three-section arrangement. In other optional embodiments, the lifting column can also adopt a two-section or four-section arrangement, etc., which is not limited here. The lifting column in this embodiment includes a first pipe 61, a second pipe 62 sleeved on the first pipe 61, and a third pipe 63 sleeved on the second pipe 62.

[0021] Reference Figures 1 to 6In this embodiment, the bottom end of the first tube 61 is provided with a first rolling guide component 81 that contacts the inner wall of the second tube 62, the top end of the second tube 62 is provided with a second rolling guide component 82 that contacts the outer side of the first tube 61, the bottom end of the second tube 62 is provided with a third rolling guide component 83 that contacts the inner wall of the third tube 63, and the top end of the third tube 63 is provided with a fourth rolling guide component 84 that contacts the outer wall of the second tube 62; wherein, the first rolling guide component 81 and the third rolling guide component 83 have the same structure, and the second rolling guide component 82 and the fourth rolling guide component 84 have the same structure.

[0022] Reference Figures 1 to 6 Taking the first tube 61 and the second tube 62 as examples, the first rolling guide component 81 is disposed at the bottom end of the first tube 61, and the second rolling guide component 82 is disposed at the top end of the second tube 62. This can effectively improve the stability and smoothness of the movement of the first tube 61 relative to the second tube 62. Specifically, the first tube 61 and the second tube 62 do not contact each other, which can effectively avoid friction.

[0023] Reference Figures 1 to 6 In this embodiment, the first tube 61, the second tube 62, and the third tube 63 are all square tubes. In other optional embodiments, round tubes or other polygonal tubes can also be used, and there is no limitation here. Specifically, the first rolling guide assembly 81 includes a first guide seat 811 and first rollers 812 respectively disposed on the four side walls of the first guide seat 811. Each side wall of the first guide seat 811 is provided with two symmetrically arranged first rollers 812. The first rollers 812 protrude from the outer side wall of the first guide seat 811, so as to be able to contact the inner wall of the second tube 62. Reference Figures 1 to 6 The first rollers 812 on two adjacent sidewalls are staggered along the length of the first tube 61. This staggered arrangement of the first rollers 812 further improves the stability of the movement of the first tube 61 relative to the second tube 62. Specifically, the first rollers 812 on the two opposite sidewalls are located in the same length direction, which also facilitates their arrangement. In this embodiment, the first rollers 812 form line contact with the inner wall of the second tube 62, which further improves stability. Of course, in other optional embodiments, the number and position of the first rollers can be adjusted as needed, and the first rollers can also be replaced with rolling elements such as balls, which is not limited here.

[0024] Reference Figures 1 to 6 In this embodiment, a step is provided at the top of the side wall of the first guide seat 811, and the bottom end of the first tube 61 is embedded in the step. A screw connected to the first guide seat 811 is passed through the first tube 61, thereby realizing a stable connection between the first guide seat 811 and the first tube 61.

[0025] Reference Figures 1 to 6In this embodiment, the second rolling guide assembly 82 includes a second guide seat 821 and four second rollers 822 disposed within the second guide seat 821. The second rollers 822 protrude from the inner sidewall of the second guide seat 821, thereby being able to contact the outer sidewall of the first tube 61. Specifically, the top end of the second tube 62 is embedded in the second guide seat 821, and a screw connected to the second guide seat 821 passes through the second tube 62, thereby achieving a stable connection between the second guide seat 821 and the second tube 62. Furthermore, the connection method between the third rolling guide assembly 83 and the second tube 62, and the connection method between the fourth rolling guide assembly and the third tube 63, are the same as or similar to the above connection methods, and will not be described in detail here.

[0026] Reference Figures 1 to 6 In this embodiment, the lifting column also includes a first screw 91 disposed in the second tube 62, and a first threaded sleeve 92 disposed between the first screw 91 and the first rolling guide assembly 81. Specifically, the first threaded sleeve 92 is fixedly disposed on the inner wall of the first guide seat 811. Of course, the first threaded sleeve 92 and the first guide seat 811 can also be integrally formed, which is not limited here. A limiting nut 911 is screwed on the top end of the first screw 91. The limiting nut 911 can contact the top end of the first threaded sleeve 92 to achieve axial limiting. When the first screw 91 rotates, the driving force acts on the first guide seat 811 through the first threaded sleeve 92, and then drives the first tube 61 to move relative to the second tube 62.

[0027] Reference Figures 1 to 6 In this embodiment, the first threaded sleeve 92 is fixedly disposed inside the first rolling guide component 81. The first rolling guide component 81 not only plays the role of guiding and limiting, but also transmits driving force and shortens the force transmission path, which can further improve the stability of the movement of the first tube 61.

[0028] Reference Figures 1 to 6 In this embodiment, the lifting column also includes a second screw 93 disposed in the third tube 63; the first screw 91 is provided with a movable cavity that cooperates with the second screw 93, that is, the first screw 91 is a hollow rod, and the second screw 93 can extend into the movable cavity; the bottom end of the inner side wall of the first screw 91 is fixedly embedded with a second screw sleeve 94 that cooperates with the second screw 93, and the top end of the second screw 93 is fixedly provided with a limiting sleeve 931 located in the movable cavity; the limiting sleeve 931 can contact the top end of the second screw sleeve 94 to achieve axial limiting.

[0029] Reference Figures 1 to 6Two bearings are provided between the bottom end of the outer wall of the first screw 91 and the third rolling guide assembly 83, so that the first screw 91 can rotate relative to the third rolling guide assembly, and the first screw 91, the bearings and the third rolling guide assembly move synchronously; wherein, the second screw sleeve 94 is located inside the third rolling guide assembly 83 along the length direction of the second tube 62; the third rolling guide assembly 83 not only plays a guiding and limiting role, but also transmits driving force and shortens the force transmission path, which can further improve the stability of the movement of the second tube 62.

[0030] Reference Figures 1 to 6 In this embodiment, the lifting column also includes a drive mechanism, a controller 995, and a power adapter 996. The drive mechanism includes a drive motor 993 installed at the bottom of the third tube 63. The controller 995 is installed on the outer wall of the third tube 63 and connected to the drive motor 993. The power adapter 996 is separately arranged from the controller 995, and the two are connected by a power cord. The power adapter 996 includes an AC-DC module, so the controller 995 operates at low voltage. Separating the controller 995 from the power adapter 996 and installing the controller 995 on the lifting column improves safety during use.

[0031] Reference Figures 1 to 6 In this embodiment, the drive mechanism also includes a fixed base 992 mounted on the top of the drive motor 993 and a bearing seat 991 sleeved on the second screw 93. The bearing seat 991 is mounted on the top of the fixed base 992. The drive motor 993 and the second screw 93 are connected by a coupling 994. That is, in this embodiment, the drive motor 993 directly drives the second screw 93 to rotate, thereby realizing the lifting adjustment. Specifically, in this embodiment, the drive motor 993 is a servo motor.

[0032] Reference Figures 1 to 6 In this embodiment, the inner side of the lifting column uses a first rolling guide component 81 and a third rolling guide component 83, which results in limited internal space and makes it difficult to install limit switches. Therefore, in order to limit the movement and prevent stalling, the lifting column in this embodiment also includes an absolute encoder, and the drive motor 993 includes a current acquisition module. The controller 995 includes an encoder position analysis module, a current detection module, and a stall detection module. The absolute encoder is installed on the end cover of the drive motor 993.

[0033] Reference Figures 1 to 6The controller 995 uses real-time position information from an absolute encoder for soft limit control based on preset soft limit positions and current stall thresholds. It executes limit protection when the stall current reaches the set threshold, effectively preventing mechanical impact. Specifically, the controller has factory-set or pre-defined upper and lower limit encoder absolute position values. When approaching the upper or lower soft limit area, the drive motor automatically decelerates. If it continues to approach the limit, the current is monitored to determine stall. When the stall current reaches the threshold, the drive motor is immediately stopped to prevent mechanical damage. Specifically, in this embodiment, the current acquisition module is a Hall current sensor or a sampling resistor. The soft limit position is stored in the controller's non-volatile memory. The stall detection module determines the stall state by monitoring the current to reach the current stall threshold or the current rise slope to reach a set value. The controller also includes a running direction recognition module, applying different limit protection strategies for the upward and downward directions. Example 2:

[0034] A maintenance platform, referring to Figures 1 to 7 The maintenance platform in this embodiment includes the lifting column in embodiment 1.

[0035] Reference Figures 1 to 7 Specifically, the maintenance platform also includes a chuck, a support frame 5, and a base 7; the chuck includes a clamping plate assembly 1, a clamping assembly 2, a fixing rod 3, and a worm gear box 4; one end of the support frame 5 is connected to the worm gear box 4, and the other end is connected to the first tube 61 to achieve the installation and fixation of the chuck; in this embodiment, the support frame 5 includes three mutually perpendicular column segments to reduce the installation height of the chuck; in other optional embodiments, the shape of the support frame 5 can be adjusted as needed, and is not limited here; the lifting column is set on the base 7, and the base 7 is placed on the ground or fixed to the ground to ensure the stability of the maintenance platform.

Claims

1. A lift column, characterized by: It includes a first tube, a second tube sleeved on the first tube, and a drive mechanism, wherein the drive mechanism includes a drive motor installed inside the lifting column; The bottom end of the first tube is provided with a first rolling guide assembly that contacts the inner wall of the second tube, and the top end of the second tube is provided with a second rolling guide assembly that contacts the outer side of the first tube.

2. A lifting column according to claim 1, characterised in that: The lifting column also includes an absolute encoder and a controller; the drive motor includes a current acquisition module; the controller includes an encoder position analysis module, a current detection module, and a stall detection module.

3. The lifting column according to claim 1, characterized in that: The lifting column also includes a controller connected to the drive motor, and a power adapter arranged separately from the controller.

4. The lifting column according to claim 1, characterized in that: The first rolling guide assembly includes a first guide seat and first rollers respectively disposed on the sidewalls of the first guide seat; wherein the first rollers of two adjacent sidewalls are staggered along the length direction of the first tube.

5. The lifting column according to claim 4, characterized in that: The lifting column also includes a first screw rod disposed in the second tube, and a first threaded sleeve disposed between the first screw rod and the first rolling guide assembly.

6. The lifting column according to claim 5, characterized in that: The lifting column also includes a third tube sleeved on the second tube. The bottom end of the second tube is provided with a third rolling guide assembly that contacts the inner wall of the third tube, and the top end of the third tube is provided with a fourth rolling guide assembly that contacts the outer side of the second tube.

7. The lifting column according to claim 6, characterized in that: The lifting column also includes a second screw disposed in the third tube; the first screw has a movable cavity that cooperates with the second screw, and the bottom end of the first screw has a second threaded sleeve that cooperates with the second screw; a bearing is disposed between the first screw and the third rolling guide assembly, such that the second threaded sleeve is located inside the third rolling guide assembly.

8. The lifting column according to claim 7, characterized in that: A coupling is provided between the drive motor and the second screw.

9. A maintenance platform, characterized in that: The lifting column includes any one of claims 1-8.

10. The maintenance platform according to claim 9, characterized in that: The maintenance platform also includes a clamp mounted on the lifting column.

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