Platform rotating handle adjusting mechanism for two-wheeled vehicle

By designing a throttle adjustment mechanism for a two-wheeled vehicle platform, multi-angle and multi-dimensional rapid adjustment of the handlebars was achieved, solving the problems of cumbersome human-machine setting process and high cost in existing technologies, thus improving efficiency and reducing development costs.

CN224075700UActive Publication Date: 2026-04-03NINE TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-28
Publication Date
2026-04-03

AI Technical Summary

Technical Problem

In the design of two-wheeled vehicles, the existing platform human-machine interface setting process is cumbersome and costly, and cannot quickly respond to the impact of shape updates on riding posture.

Method used

Design a throttle adjustment mechanism for a two-wheeled vehicle platform, including a throttle mounting rod, a slide rail, a longitudinal rotation mechanism, an axial rotation mechanism, a left-right lateral movement mechanism, a forward-backward movement mechanism, a vertical movement mechanism, and a column angle adjustment mechanism. Through high-precision servo motor control and a multi-link structure, the handle can be quickly adjusted in multiple angles and dimensions.

Benefits of technology

It improves the efficiency of human-machine debugging, reduces development costs, increases design flexibility, facilitates the testing and optimization of different design schemes, is highly convenient to operate, and human-machine testers can complete testing tasks independently.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

The utility model relates to a two-wheeled vehicle platform rotating handle adjusting mechanism which comprises a rotating handle mounting rod, a sliding rail, a longitudinal rotating mechanism and an axial rotating mechanism. The axial rotating mechanism comprises a rotating handle base, a first steering engine support and a second steering engine, a sliding block is arranged at the lower end of the rotating handle base, a first installation opening is formed in the upper end of the rotating handle base, the second steering engine is installed in the first installation opening, the second steering engine is covered with the first steering engine support, and the output end of the second steering engine is connected with the two sides in the first steering engine support. A connecting column is further arranged at the upper end of the rotating handle base, and the sliding block is connected to the sliding rail in a sliding mode. A second installation opening is formed in the side edge, away from the second connecting rod, of the first steering engine support. The longitudinal rotating mechanism comprises a third steering engine and a second steering engine support, the third steering engine is installed in the second installation opening, the second steering engine support covers the third steering engine, the output end of the third steering engine is connected with the two sides of the interior of the second steering engine support, and the other end of the second steering engine support is fixedly connected with a rotating handle installation rod.
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Description

Technical Field

[0001] This utility model relates to the field of two-wheeled vehicle technology, and more specifically, to a two-wheeled vehicle platform throttle adjustment mechanism. Background Technology

[0002] In the current design process of two-wheeled vehicles, the style of the frame platform is usually adjusted as the product's appearance is updated. If the new design affects the rider's posture (i.e., human-computer interaction state), the adjusted riding posture must be tested and verified to ensure rider comfort.

[0003] The current common practice is to make samples directly without changing the existing platform. However, the current human-computer interaction settings of the platform are often based on past experience to make samples in advance and then test the human-computer interaction. If the human-computer interaction is not satisfactory during the subsequent testing process, it is necessary to remake the samples according to the actual situation. This significantly increases the time and cost of the process and is quite cumbersome.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Utility Model Content

[0005] The purpose of this utility model is to provide a throttle adjustment mechanism for a two-wheeled vehicle platform. This mechanism is easy to operate, improves efficiency, and reduces development costs.

[0006] This utility model provides a two-wheeled vehicle platform handlebar ergonomic adjustment mechanism, including a throttle mounting rod, slide rails, a longitudinal rotation mechanism, an axial rotation mechanism, a left-right lateral movement mechanism, a front-back movement mechanism, a vertical movement mechanism, a column angle adjustment mechanism, and a fixed base. The slide rails are fixedly connected to both sides of the left-right lateral movement mechanism. The axial rotation mechanisms are slidably connected to the slide rails, and both axial rotation mechanisms are connected to the left-right lateral movement mechanisms. The longitudinal rotation mechanism is connected to the other end of the axial rotation mechanism, and the throttle mounting rod is connected to the longitudinal rotation mechanism. The front-back movement mechanism is connected to the lower end of the left-right lateral movement mechanism, and the vertical movement mechanism is connected to the lower end of the front-back movement mechanism. The moving mechanism includes a fixed base hinged to the lower end of the vertical moving mechanism, and a column angle adjustment mechanism installed between the fixed base and the vertical moving mechanism. The left-right lateral moving mechanism drives two axial rotating mechanisms to slide closer or further apart on the slide rail. The axial rotating mechanism drives the longitudinal rotating mechanism to rotate horizontally, and the longitudinal rotating mechanism drives the throttle mounting rod to rotate vertically. The front-back moving mechanism adjusts the forward and backward movement of the left-right lateral moving mechanism, and the vertical moving mechanism adjusts the up-and-down movement of the front-back moving mechanism. The column angle adjustment mechanism adjusts the angle between the vertical moving mechanism and the fixed base.

[0007] Furthermore, the left and right lateral movement mechanism includes a mounting bracket, a first servo motor, a first connecting rod, and a second connecting rod; the slide rails are fixedly connected to both sides of the mounting bracket, the first servo motor is fixedly connected inside the mounting bracket, the output end of the first servo motor is fixedly connected to the middle of the first connecting rod, and the two ends of the first connecting rod are rotatably connected to the second connecting rod; the axial rotation mechanism includes a throttle base, a first servo motor bracket, and a second servo motor, the lower end of the throttle base is provided with a slider that cooperates with the slide rail, the upper end of the throttle base is provided with a first mounting port, the second servo motor is installed in the first mounting port, the first servo motor bracket covers the second servo motor, the output end of the second servo motor is connected to both sides inside the first servo motor bracket, and is used to drive the first servo motor bracket to rotate; a connecting post is also provided at the upper end of the throttle base, the other end of the second connecting rod is rotatably connected to the connecting post, and the slider is slidably connected to the slide rail.

[0008] Furthermore, a second mounting port is provided on the side of the first servo bracket away from the second connecting rod; the longitudinal rotation mechanism includes a third servo and a second servo bracket, the third servo is installed in the second mounting port, the second servo bracket covers the third servo, the output end of the third servo is connected to both sides inside the second servo bracket, and is used to drive the second servo bracket to rotate; the other end of the second servo bracket is fixedly connected to the throttle mounting rod.

[0009] Furthermore, the forward and backward moving mechanism includes a handle slide base and a handle mounting plate; the upper part of the handle slide base is fixedly connected to the lower end of the mounting frame, the lower part of the handle slide base is provided with a slide groove, the handle mounting plate is slidably installed in the slide groove, and the handle slide base is provided with a through locking screw hole.

[0010] Furthermore, the up-and-down moving mechanism includes a column, a rotation limiting component, and a column base tube; the column is square tubular, and one end of the column is fixedly connected to the bottom of the handle mounting plate; the rotation limiting component has a through square hole, the other end of the column is inserted into the square hole, and the rotation limiting component is inserted into the column base tube; a through square opening is provided on the side of the column base tube, and a through locking screw hole is provided on the side of the rotation limiting component.

[0011] Furthermore, the column angle adjustment mechanism includes a third link, a fourth link, a fifth link, a fourth servo motor, a third servo motor bracket, and a limiting post; the third servo motor bracket is fixedly connected to the top of the fixed base, the third link is L-shaped, and the third link is fixed on both sides of the fixed base, the other end of the third link is rotatably connected to the side of the column base tube through the limiting post; the third servo motor bracket has an installation notch on its top, the fourth servo motor is installed in the installation notch, the output ends of the fourth servo motor are fixedly connected to the fourth link, the other end of the fourth link is rotatably connected to the fifth link, and the other ends of the two fifth links are rotatably connected to the side of the column base tube through the limiting post.

[0012] This utility model provides a two-wheeled vehicle platform handlebar human-machine interface adjustment mechanism. Through a central controller, the rotation of a servo motor is controlled. This mechanism allows for changes in the handlebar angle, width, and column angle (thus controlling the tilt angle and reach of the front suspension). Forward and backward movement and upward and downward movement mechanisms control the handlebar's height. High-precision servo motor control and a multi-link structure enable rapid, multi-angle, and multi-dimensional adjustments to the handlebar via simple button presses. This utility model reduces development costs and shortens the human-machine interface debugging cycle; increases design flexibility by facilitating testing and optimization of different design schemes through adjustment functions; increases operational convenience, allowing human-machine interface testing personnel to independently complete testing tasks without assistance; and improves efficiency while reducing development costs. Attached Figure Description

[0013] Figure 1 A schematic diagram of the human-machine interface adjustment mechanism for the handlebars of the two-wheeled vehicle platform provided in this embodiment of the utility model.

[0014] Figure 2 for Figure 1 Exploded view of the human-machine interface adjustment mechanism of the two-wheeled vehicle platform.

[0015] Figure 3 for Figure 1 A side view of the human-machine interface adjustment mechanism of the handlebars on a two-wheeled vehicle platform.

[0016] Figure 4 for Figure 1 A schematic diagram of the other side of the human-machine adjustment mechanism of the handlebars of the two-wheeled vehicle platform.

[0017] Figure 5 for Figure 1 Exploded view of the column angle adjustment mechanism of the human-machine interface adjustment mechanism of the two-wheeled vehicle platform.

[0018] Figure 6 for Figure 1 A side view of the up-and-down movement mechanism of the handlebar adjustment mechanism of a two-wheeled vehicle platform.

[0019] Figure 7 for Figure 1 A schematic diagram of the up-and-down movement mechanism of the handlebar adjustment mechanism of the two-wheeled vehicle platform from another side.

[0020] Figure 8 for Figure 1 A schematic diagram of the left and right lateral movement mechanism of the handlebar adjustment mechanism of a two-wheeled vehicle platform.

[0021] Figure 9 for Figure 1 Another structural schematic diagram of the left and right lateral movement mechanism of the handlebar adjustment mechanism of the two-wheeled vehicle platform.

[0022] Figure 10 for Figure 1 Exploded view of the left and right lateral movement mechanism of the human-machine interface adjustment mechanism of the two-wheeled vehicle platform.

[0023] Figure 11 for Figure 1 A schematic diagram of the longitudinal rotation mechanism and the axial rotation mechanism of the handlebar adjustment mechanism of the two-wheeled vehicle platform.

[0024] Figure 12 for Figure 1 Another structural schematic diagram of the longitudinal rotation mechanism and the axial rotation mechanism of the handlebar human-machine adjustment mechanism of the two-wheeled vehicle platform.

[0025] Figure 13 for Figure 1 Exploded view of the longitudinal rotation mechanism and axial rotation mechanism of the handlebar adjustment mechanism of the two-wheeled vehicle platform.

[0026] The reference numerals and components involved in the accompanying drawings are shown below:

[0027] 1. Throttle mounting rod; 2. Slide rail; 3. Longitudinal rotation mechanism

[0028] 31. Third servo motor; 32. Second servo motor bracket; 4. Axial rotation mechanism.

[0029] 41. Throttle base; 42. First servo bracket; 43. Second servo.

[0030] 44. Slider; 45. First mounting port; 46. Connecting post

[0031] 47. Second mounting port; 5. Left and right horizontal movement mechanism; 51. Mounting bracket

[0032] 52. First servo motor; 53. First linkage; 54. Second linkage

[0033] 6. Forward and backward moving mechanism 61. Handle slide base 62. Handle mounting plate

[0034] 63. Slide groove; 64. Locking screw hole; 7. Up and down moving mechanism

[0035] 71. Column; 72. Rotation limiting component; 73. Column base tube

[0036] 74. Square hole; 75. Square opening; 8. Column angle adjustment mechanism

[0037] 81. Third link 82. Fourth link 83. Fifth link

[0038] 84. Fourth servo motor; 85. Third servo motor bracket; 86. Limiting post.

[0039] 87. Installation notch; 9. Fixed base Detailed Implementation

[0040] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0041] The terms "first," "second," "third," "fourth," etc., used in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0042] Example 1

[0043] Figure 1 This is a structural schematic diagram of the human-machine interface adjustment mechanism for the two-wheeled vehicle platform handlebars provided in an embodiment of this utility model. Please refer to... Figure 1 The two-wheeled vehicle platform handlebar adjustment mechanism provided in this embodiment includes a throttle mounting rod 1, a slide rail 2, a longitudinal rotation mechanism 3, an axial rotation mechanism 4, a left-right lateral movement mechanism 5, a front-back movement mechanism 6, a vertical movement mechanism 7, a column angle adjustment mechanism 8, and a fixed base 9. The slide rail 2 is fixedly connected to both sides of the left-right lateral movement mechanism 5. The axial rotation mechanism 4 is slidably connected to the slide rail 2. Both axial rotation mechanisms 4 are connected to the left-right lateral movement mechanism 5. The longitudinal rotation mechanism 3 is connected to the other end of the axial rotation mechanism 4, and the throttle mounting rod 1 is connected to the longitudinal rotation mechanism 3. The front-back movement mechanism 6 is connected to the lower end of the left-right lateral movement mechanism 5. The vertical movement mechanism 7 is connected to the lower end of the front-back movement mechanism 6. The fixed base 9 is hinged to the lower end of the vertical movement mechanism 7. The column angle adjustment mechanism 8 is installed between the fixed base 9 and the vertical movement mechanism 7.

[0044] It should be noted that the left and right horizontal movement mechanism 5 of this utility model is used to drive the two axial rotation mechanisms 4 to slide closer to each other or further away from each other on the slide rail 2. The axial rotation mechanism 4 is used to drive the longitudinal rotation mechanism 3 to rotate in the horizontal direction. The longitudinal rotation mechanism 3 is used to drive the throttle mounting rod 1 to rotate in the vertical direction. The front and back movement mechanism 6 is used to adjust the front and back movement of the left and right horizontal movement mechanism 5. The up and down movement mechanism 7 is used to adjust the up and down movement of the front and back movement mechanism 6. The column angle adjustment mechanism 8 is used to adjust the included angle between the up and down movement mechanism 7 and the fixed base 9.

[0045] This utility model discloses a two-wheeled vehicle platform handlebar human-machine interface adjustment mechanism. Through a central controller, the rotation of a servo motor is controlled. This mechanism allows for changes in the handlebar angle, width, and column angle, thereby controlling the tilt angle and reach of the front suspension. The forward and backward movement mechanism 6 and the up and down movement mechanism 7 control the handlebar's forward and backward movement and vertical height. High-precision servo motor control and a multi-link structure enable rapid, multi-angle, and multi-dimensional adjustments to the handlebar via simple button presses. This utility model reduces development costs and shortens the human-machine interface debugging cycle; increases design flexibility by facilitating testing and optimization of different design schemes through adjustment functions; increases operational convenience, allowing human-machine interface testing personnel to independently complete testing tasks without assistance; and improves efficiency while reducing development costs.

[0046] Figure 2 for Figure 1 Exploded view of the human-machine interface adjustment mechanism of the two-wheeled vehicle platform. Figure 8 for Figure 1 A schematic diagram of the left and right lateral movement mechanism of the handlebar adjustment mechanism of a two-wheeled vehicle platform. Figure 9 for Figure 1 Another structural diagram of the left and right lateral movement mechanism of the handlebar human-machine adjustment mechanism of the two-wheeled vehicle platform. Figure 10 for Figure 1 Exploded view of the left and right lateral movement mechanism of the handlebar adjustment system on a two-wheeled vehicle platform. Please refer to... Figure 2 , Figure 8 , Figure 9 , Figure 10 The left-right lateral movement mechanism 5 of this utility model includes a mounting frame 51, a first servo motor 52, a first connecting rod 53, and a second connecting rod 54. Slide rails 2 are fixedly connected to both sides of the mounting frame 51. The first servo motor 52 is fixedly connected inside the mounting frame 51. The output end of the first servo motor 52 is fixedly connected to the middle of the first connecting rod 53, and the second connecting rod 54 is rotatably connected to both ends of the first connecting rod 53. The axial rotation mechanism 4 includes a throttle base 41, a first servo motor bracket 42, and a second servo motor 43. The lower end of the throttle base 41 is provided with... The slider 44 is fitted to the slide rail 2. The upper end of the throttle base 41 is provided with a first mounting port 45. The second servo motor 43 is installed in the first mounting port 45. The first servo motor bracket 42 covers the second servo motor 43. The output end of the second servo motor 43 is connected to both sides of the inside of the first servo motor bracket 42 to drive the first servo motor bracket 42 to rotate. The upper end of the throttle base 41 is also provided with a connecting post 46. The other end of the second connecting rod 54 is rotatably connected to the connecting post 46. The slider 44 is slidably connected to the slide rail 2.

[0047] It should be noted that, as Figure 8 , Figure 9 As shown, when the output end of the first servo motor 52 rotates, it will drive the first link 53 to rotate, the first link 53 will pull the second link 54 to swing, and the second link 54 will pull the throttle base 41 to slide left and right on the slide rail 2.

[0048] This invention uses a high-precision first servo motor 52 to control the coordination of the first link 53, the second link 54, the slider 44, and the slide rail 2, so that the handle can quickly retract to the same position on both sides.

[0049] Figure 11 for Figure 1 A schematic diagram of the longitudinal rotation mechanism and the axial rotation mechanism of the handlebar adjustment mechanism of a two-wheeled vehicle platform. Figure 12 for Figure 1 Another structural diagram of the longitudinal rotation mechanism and the axial rotation mechanism of the handlebar human-machine adjustment mechanism of the two-wheeled vehicle platform. Figure 13 for Figure 1 Exploded views of the longitudinal and axial rotation mechanisms of the handlebar adjustment mechanism on a two-wheeled vehicle platform. Please refer to... Figure 11 , Figure 12 , Figure 13 In this invention, a second mounting port 47 is provided on the side of the first servo bracket 42 away from the second connecting rod 54; the longitudinal rotation mechanism 3 includes a third servo 31 and a second servo bracket 32, the third servo 31 is installed in the second mounting port 47, the second servo bracket 32 ​​covers the third servo 31, the output end of the third servo 31 is connected to both sides inside the second servo bracket 32, and is used to drive the second servo bracket 32 ​​to rotate; the other end of the second servo bracket 32 ​​is fixedly connected to the throttle mounting rod 1.

[0050] It should be noted that, as Figure 11 , Figure 12 As shown, when the output end of the second servo motor 43 rotates, it drives the first servo motor bracket 42 to rotate in the horizontal direction, so that the first servo motor bracket 42 will drive the third servo motor 31 on it to rotate in the horizontal direction; when the output end of the third servo motor 31 rotates, it will drive the second servo motor bracket 32 ​​to rotate in the vertical direction, thereby driving the throttle mounting rod 1 to rotate in the vertical direction.

[0051] Figure 6 for Figure 1 A side view of the up-and-down movement mechanism of the handlebar adjustment mechanism of a two-wheeled vehicle platform. Figure 7 for Figure 1 Another side view of the vertical movement mechanism of the handlebar adjustment mechanism on the two-wheeled vehicle platform. Please refer to... Figure 2 , Figure 6 , Figure 7The forward and backward moving mechanism 6 of this utility model includes a handle slide base 61 and a handle mounting plate 62; the upper part of the handle slide base 61 is fixedly connected to the lower end of the mounting bracket 51, the lower part of the handle slide base 61 is provided with a slide groove 63, the handle mounting plate 62 is slidably installed in the slide groove 63, and a through locking screw hole 64 is provided on the handle slide base 61.

[0052] It should be noted that when the handle slide base 61 slides on the handle mounting plate 62, it will drive the left and right horizontal movement mechanism 5 to move back and forth; at the same time, it can be bolted to the locking screw hole 64 to lock its position.

[0053] Further reference Figure 2 , Figure 6 , Figure 7 The vertical moving mechanism 7 of this utility model includes a column 71, a rotation limiting component 72, and a column base tube 73; the column 71 is in the shape of a square tube, and one end of the column 71 is fixedly connected to the bottom of the handle mounting plate 62; the rotation limiting component 72 is provided with a through square hole 74, and the other end of the column 71 is inserted into the square hole 74, and the rotation limiting component 72 is inserted into the column base tube 73; a through square opening 75 is provided on the side of the column base tube 73, and a through locking screw hole 64 is provided on the side of the rotation limiting component 72.

[0054] It should be noted that by adjusting the depth of the column 71 inserted into the square hole 74, the up and down movement of the front and back moving mechanism 6 can be adjusted, and the position can be locked by threading the bolt through the square opening 75 onto the locking screw hole 64; the handle height and front and back position can be quickly adjusted by the up and down moving mechanism 7.

[0055] Figure 3 for Figure 1 A side view of the handlebar adjustment mechanism of a two-wheeled vehicle platform. Figure 4 for Figure 1 Another side view of the human-machine interface adjustment mechanism of the two-wheeled vehicle platform. Figure 5 for Figure 1 Exploded view of the column angle adjustment mechanism of the handlebar human-machine interface on the two-wheeled vehicle platform. Please refer to... Figure 2 , Figure 3 , Figure 4 , Figure 5The column angle adjustment mechanism 8 of this utility model includes a third link 81, a fourth link 82, a fifth link 83, a fourth servo motor 84, a third servo motor bracket 85, and a limiting post 86. The third servo motor bracket 85 is fixedly connected to the top of the fixed base 9. The third link 81 is L-shaped and is fixed on both sides of the fixed base 9. The other end of the third link 81 is rotatably connected to the side of the column base tube 73 through the limiting post 86. The third servo motor bracket 85 has an installation notch 87 on its top. The fourth servo motor 84 is installed in the installation notch 87. The output ends of the fourth servo motor 84 are fixedly connected to the fourth link 82 on both sides. The other end of the fourth link 82 is rotatably connected to the fifth link 83. The other ends of the two fifth links 83 are rotatably connected to the side of the column base tube 73 through the limiting post 86.

[0056] It should be noted that, as Figure 3 , Figure 4 As shown, when the output ends on both sides of the fourth servo motor 84 rotate, it will drive the fourth link 82 to rotate. The fourth link 82 will drive the fifth link 83 to swing. The fifth link 83 will drive the column base tube 73 to rotate around the limiting post 86 on the third link 81. This will adjust the angle between the column base tube 73 and the fixed base 9, thereby adjusting the angle between the up-and-down moving mechanism 7 and the fixed base 9. Through the cooperation of the fourth servo motor 84 with the third link 81, the fourth link 82, and the fifth link 83, the angle of the column 71 can be precisely controlled. Compared with the previous direct welding of the frame, the positioning accuracy is higher and the adjustability is higher, which can quickly respond to the human-machine test stage when developing a new vehicle platform.

[0057] As can be seen from the above description, the advantages of this utility model are:

[0058] This utility model provides a two-wheeled vehicle platform handlebar human-machine interface adjustment mechanism. Through a central controller, the rotation of a servo motor is controlled. This mechanism allows for changes in the handlebar angle, width, and column angle (thus controlling the tilt angle and reach of the front suspension). Forward and backward movement and upward and downward movement mechanisms control the handlebar's height. High-precision servo motor control and a multi-link structure enable rapid, multi-angle, and multi-dimensional adjustments to the handlebar via simple button presses. This utility model reduces development costs and shortens the human-machine interface debugging cycle; increases design flexibility by facilitating testing and optimization of different design schemes through adjustment functions; increases operational convenience, allowing human-machine interface testing personnel to independently complete testing tasks without assistance; and improves efficiency while reducing development costs.

[0059] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A two-wheeled vehicle platform handlebar adjustment mechanism, characterized by, The handle mounting rod (1), the slide rail (2), the longitudinal rotation mechanism (3) and the axial rotation mechanism (4) are included. The axial rotation mechanism (4) includes a handle base (41), a first steering gear support (42) and a second steering gear (43), the lower end of the handle base (41) is provided with a sliding block (44) matched with the slide rail (2), the upper end of the handle base (41) is provided with a first mounting port (45), the second steering gear (43) is installed in the first mounting port (45), the first steering gear support (42) covers the second steering gear (43), the output end of the second steering gear (43) is connected with the two sides inside the first steering gear support (42) for driving the first steering gear support (42) to rotate; The upper end of the handle base (41) is further provided with a connecting column (46), the other end of the second connecting rod (54) is rotatably connected to the connecting column (46), and the sliding block (44) is slidably connected to the slide rail (2); The first steering gear support (42) is provided with a second mounting port (47) on the side away from the second connecting rod (54); The longitudinal rotation mechanism (3) includes a third steering gear (31) and a second steering gear support (32), the third steering gear (31) is installed in the second mounting port (47), the second steering gear support (32) covers the third steering gear (31), the output end of the third steering gear (31) is connected with the two sides inside the second steering gear support (32) for driving the second steering gear support (32) to rotate, and the other end of the second steering gear support (32) is fixedly connected with the handle mounting rod (1).