Lifting chassis with variable wheel track and wheel base

Abstract

A lifting chassis with variable wheel track and wheel base relates to the technical field of chassis and is used for solving the problem that the height, the wheel track and the wheel base of an existing chassis cannot be adjusted simultaneously. Comprising a chassis rack, a variable pitch assembly, an adjusting assembly, a wheel assembly, a driving assembly and a power assembly. The variable-pitch assembly comprises a variable-pitch guide rail plate and an electric push rod, the variable-pitch guide rail plate is obliquely arranged, the upper end of the variable-pitch guide rail plate is hinged to the chassis rack, and the electric push rod is arranged between the lower end of the variable-pitch guide rail plate and the chassis rack; the two adjusting assemblies are arranged front and back, each adjusting assembly comprises two universal joint connecting rods, the first ends of the universal joint connecting rods are provided with variable-pitch sliding blocks, and the variable-pitch sliding blocks are in sliding connection with the variable-pitch guide rail plates on the corresponding sides; the number of the wheel assemblies is four, and the four wheel assemblies are in one-to-one correspondence with the four variable-pitch sliding blocks. The input end of the driving assembly is connected with the power assembly, and the output end of the driving assembly is connected with the second end of the universal joint connecting rod. The chassis height, the wheel base and the wheel track can be adjusted at the same time.

Description

Technical Field

[0001] This invention relates to the field of chassis technology, specifically to a variable wheelbase and wheelbase lifting chassis. Background Technology

[0002] The chassis is a crucial carrier and technical support for vehicle equipment. Traditional chassis typically have fixed and non-adjustable track width and wheelbase. Real-world, complex operating environments, such as potholes, obstacles, height and width restrictions, place higher demands on the chassis. Therefore, there is an urgent need for a chassis with adjustable track width and wheelbase, capable of both adjustment and elevation to adapt to different terrains. Summary of the Invention

[0003] The purpose of this invention is to provide a variable wheelbase and wheelbase lifting chassis to solve the problem that existing chassis height, wheelbase and wheelbase cannot be adjusted simultaneously.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a variable wheelbase and wheel track lifting chassis, including a chassis frame, a variable wheel track assembly, an adjustment assembly, a drive assembly, a power assembly, and a wheel assembly; The pitch control assembly includes a pitch control guide plate and an electric push rod. The pitch control guide plate is inclined vertically and horizontally relative to the chassis frame. The upper end of the pitch control guide plate is hinged to the chassis frame. The electric push rod is located between the lower end of the pitch control guide plate and the chassis frame. When the electric push rod is activated, it drives the pitch control guide plate to swing relative to the chassis frame. The adjustment components are arranged in two sets, one in front and one behind. The adjustment components include two universal joint rods arranged symmetrically on the left and right. The first end of the universal joint rod has a pitch slider. The pitch slider is slidably connected to the pitch guide plate on the corresponding side and the sliding direction is the tilt direction of the pitch guide plate. The input end of the drive component is connected to the power component, the output end of the drive component is connected to the second end of the universal joint link, the power component outputs rotational motion to the input end of the drive component, and the output end of the drive component performs linear motion with the motion trajectory being the front-rear direction of the chassis frame. The wheel assembly has four components, and each wheel assembly corresponds to one of the four pitch sliders. The wheel assembly includes a cantilever, a steering joint, a wheel, and a steering motor. The first end of the cantilever is fixedly connected to the pitch slider on the corresponding side, and the second end of the cantilever is connected to the wheel through the steering joint. The steering motor is fixed to the second end of the cantilever to drive the steering joint to rotate in the horizontal plane.

[0005] Furthermore, the chassis frame has a first ear plate and a second ear plate, the lower end of the variable pitch guide plate has a third ear plate, the upper end of the variable pitch guide plate is hinged to the first ear plate via a mounting shaft, the fixed part of the electric push rod is hinged to the third ear plate, and the telescopic part of the electric push rod is hinged to the second ear plate.

[0006] Furthermore, the power assembly includes a power motor and a reducer, both of which are fixed to the bottom of the chassis frame. The input end of the reducer is connected to the output shaft of the power motor, and the output end of the reducer is connected to the input end of the drive assembly.

[0007] Furthermore, the input end of the drive assembly includes a drive disk, and the output end of the drive assembly includes a drive disk connecting rod. The output end of the reducer drives the rotation of the drive disk through a coupling. The drive disk connecting rod consists of two symmetrically arranged rods, and each of the two drive disk connecting rods corresponds one-to-one with one of the two adjusting components. The first end of the drive disk connecting rod is connected to the drive disk, and the second end of the drive disk connecting rod is universally connected to the second end of the corresponding side universal joint connecting rod. The drive disk connecting rod is slidably connected to the chassis frame, and the sliding direction is the front-to-back direction.

[0008] Furthermore, the drive disk is fixedly connected to the coupling, and the upper surface of the drive disk has a drive groove. With the center of the drive disk as the base point, the drive groove has two symmetrically arranged highest points and two symmetrically arranged lowest points. The first end of the drive disk connecting rod has a drive disk slider, which is slidably or rollingly disposed in the drive groove.

[0009] Furthermore, the input end of the drive assembly also includes a drive wheel and two drive wheel connecting rods. The drive wheel is fixedly connected to a coupling. There are two drive discs symmetrically arranged front and back with the drive wheel as the center. The drive discs are rotatably connected to the chassis frame and the drive discs are gear-fitted to the drive wheel. Each drive disc has a drive wheel connecting rod between itself and the corresponding drive disc connecting rod. The first end of the drive wheel connecting rod is hinged to the corresponding drive disc connecting rod, and the second end of the drive wheel connecting rod is hinged to the corresponding drive disc connecting rod.

[0010] Furthermore, universal joint connectors are universally connected to both ends of the universal joint link. The universal joint connector at the first end of the universal joint link is fixedly connected to the pitch slider, and the universal joint connector at the second end of the universal joint link is fixedly connected to the second end of the drive disc link.

[0011] Furthermore, the drive assembly includes a lead screw and a nut. The lead screw is the input end of the drive assembly, and the nut is the output end of the drive assembly. The lead screw is rotatably mounted on the chassis frame. The output end of the reducer is geared to the lead screw. The lead screw has two external threads with opposite directions of rotation. A nut is installed on each external thread. The nut is slidably connected to the chassis frame and fixedly connected to the corresponding drive disc connecting rod.

[0012] Furthermore, the first end of the cantilever has a circular hole and a positioning groove. The positioning groove is evenly distributed on the circumference with the circular hole as the center. The side wall of the variable pitch slider has a slider-side threaded hole and a protrusion. The protrusion is evenly distributed on the circumference with the slider-side threaded hole as the center. The protrusion extends into the positioning groove to achieve relative fixation of the cantilever and the variable pitch slider in the circumferential direction. The cantilever and the variable pitch slider are locked and fixed by a screw that passes through the circular hole and mates with the slider-side threaded hole.

[0013] Furthermore, the universal joint connector has a stud, and the universal joint connector is fixedly connected to the pitch slider or drive disc connecting rod through the stud.

[0014] The beneficial effects of this invention are as follows: The wheel assembly and the pitch slider of the adjustment assembly are fixedly connected. The pitch slider is slidably mounted on the pitch guide plate of the pitch assembly. The pitch guide plate is inclined both vertically and horizontally relative to the chassis frame. Therefore, when the pitch slider slides along the pitch guide plate, it moves vertically, horizontally, and forward / backward relative to the chassis frame. This allows for adjustment of the distance between the wheel assembly and the chassis frame (i.e., chassis height), as well as the distance between the left and right wheel assemblies (i.e., track width) and the distance between the front and rear wheel assemblies (i.e., wheelbase). This invention can adjust both chassis height and simultaneously the track width and wheelbase, thus adapting to complex road environments with potholes, obstacles, and width restrictions. Attached Figure Description

[0015] Figure 1 This is one of the three-dimensional diagrams of the present invention; Figure 2 This is the second three-dimensional diagram of the present invention; Figure 3 This is the third three-dimensional diagram of the present invention; Figure 4 This is the left view of the present invention; Figure 5 This is a top view of the present invention; Figure 6 This is the front view of the present invention; Figure 7 A 3D diagram of the drive disc connecting rod; Figure 8 A 3D diagram of a universal joint connector; Figure 9 This is a 3D view of the variable pitch slider; Figure 10 This is a 3D view of the variable pitch guide plate; Figure 11 This is a 3D diagram of the cantilever. Figure 12 Top view of other structural forms of the driving component; In the diagram: 1. Chassis frame; 11. First ear plate; 12. Second ear plate; 2. Power assembly; 21. Power motor; 22. Reducer; 23. Coupling; 3. Drive assembly; 31. Drive disc; 311. Drive groove; 32. Drive disc connecting rod; 321. Drive disc slider; 322. Mounting surface; 323. Connecting rod threaded hole; 33. Connecting rod slider; 34. Connecting rod slide rail; 35. Drive wheel; 36. Drive wheel connecting rod; 4. Adjustment assembly; 41. Universal joint connecting rod; 42. Universal joint connector. Head, 421 Stud, 43 Pitch slider, 431 Threaded hole on slider, 432 Threaded hole on slider side, 433 Protrusion, 5 Pitch assembly, 51 Pitch guide plate, 511 Slide groove, 512 Third ear plate, 52 Mounting shaft, 53 Electric push rod, 6 Wheel assembly, 61 Cantilever, 611 First connecting end, 612 Second connecting end, 613 Round hole, 614 Positioning groove, 62 Steering motor, 63 Steering joint, 64 Wheel, 65 Screw. Detailed Implementation

[0016] like Figures 1 to 12 As shown, the variable track and wheelbase lifting chassis of the present invention includes a chassis frame 1, a power assembly 2, a drive assembly 3, an adjustment assembly 4, a pitch conversion assembly 5, and a wheel assembly 6. The chassis frame 1 is the basic component of the present invention, used to support and install other components. The power assembly 2 outputs rotational motion, and the drive assembly 3 transmits the rotational motion output by the power assembly 2 to the adjustment assembly 4. The wheel assembly 6 is fixedly connected to the adjustment assembly 4 and slidably connected to the pitch conversion assembly 5. By sliding the adjustment assembly 4 along the oblique direction of the pitch conversion assembly 5, the wheel assembly 6 moves vertically while simultaneously moving laterally and longitudinally, thereby achieving the purpose of adjusting the chassis height, track width, and wheelbase of the present invention. The structure and working principle of the present invention will be described in detail below with reference to the accompanying drawings.

[0017] like Figures 1 to 3 As shown, the chassis frame 1 has a rectangular structure. The length direction of the chassis frame 1 is the front-to-back direction, and the width direction of the chassis frame 1 is the left-to-right direction.

[0018] like Figure 3 , Figure 4 and Figure 6As shown, the power assembly 2 includes a power motor 21, a reducer 22, and a coupling 23. Both the power motor 21 and the reducer 22 are fixed to the bottom of the chassis frame 1. The reducer 22 is a worm gear reducer with a reverse locking function. The input end of the reducer 22 is connected to the output shaft of the power motor 21, and the output end of the reducer 22 has a coupling 23, which is connected to the input end of the drive assembly 3. The input end of the drive assembly 3 is connected to the power assembly 2. The power assembly 2 outputs rotational motion to the input end of the drive assembly 3, and the output end of the drive assembly 3 performs linear motion along the front-rear direction of the chassis frame 1.

[0019] The first implementation of driver component 3 is described below.

[0020] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the drive assembly 3 in Embodiment 1 includes a drive disk 31 and drive disk connecting rods 32. The drive disk 31 is located above the chassis frame 1. A coupling 23 is directly fixedly connected to the drive disk 31. The drive disk connecting rods 32 are two symmetrically arranged front-to-back, and are slidably connected to the chassis frame 1 in the front-to-back direction. To achieve the slidable connection between the drive disk connecting rods 32 and the chassis frame 1, two connecting rod sliders 33 are fixed to the bottom of the drive disk connecting rods 32. Connecting rod slide rails 34, placed front-to-back, are fixed on the chassis frame 1, and are two symmetrically arranged around the drive disk 31. The connecting rod sliders 33 are slidably mounted on the corresponding connecting rod slide rails 34. When the drive disk 31 rotates, it drives the drive disk connecting rods 32 to move linearly. The drive disk 31 is the input end of the drive assembly 3, and the drive disk connecting rods 32 are the output end of the drive assembly 3. The input of the drive assembly 3 is rotational motion, and the output of the drive assembly 3 is linear motion. The drive disk 31, the drive disk connecting rod 32, and the chassis frame 1 constitute the cam slider mechanism.

[0021] To drive the drive disc linkage 32 to move linearly by rotating the drive disc 31, such as... Figure 5 As shown, the upper surface of the drive disk 31 has a drive groove 311, which has a rhomboid structure. With the center of the drive disk 31 as the base point, the drive groove 311 has two symmetrically arranged highest points and two symmetrically arranged lowest points. Figure 7 As shown, the first end of the drive disc connecting rod 32 has a drive disc slider 321, and the second end of the drive disc connecting rod 32 has two mounting surfaces 322. The angle between the mounting surfaces 322 and the front-rear direction is 45°, and the angle between the two mounting surfaces 322 is 90°. A connecting rod threaded hole 323 is provided on the mounting surface 322. Figure 1As shown, the drive disk slider 321 is slidably or rollably disposed within the drive groove 311. After the power motor 21 is started, the drive disk 31 is rotated through the reducer 22 and the coupling 23. At this time, the drive disk slider 321 moves or rolls within the drive groove 311, thereby pushing or pulling the drive disk connecting rod 32 to move back and forth, and the movement directions of the two drive disk connecting rods 32 are always opposite.

[0022] The second implementation of driver component 3 is described below.

[0023] Compared with the driving component 3 in Embodiment 1, such as Figure 12 As shown, the drive assembly 3 in Embodiment 2 further includes a drive wheel 35 and a drive wheel connecting rod 36. In this case, the drive wheel 35 is the input end of the drive assembly and is fixedly connected to the coupling 23. Two drive discs 31 are symmetrically arranged around the drive wheel 35, and are rotatably connected to the chassis frame 1. Both the drive discs 31 and the drive wheel 35 are essentially gears. The drive discs 31 and the drive wheel 35 are gear-operated. When the drive wheel 35 rotates, it drives the two drive discs 31 to rotate, and the two drive discs 31 rotate in the same direction. The first end of the drive wheel connecting rod 36 is eccentrically hinged to the drive disc 31, and the second end of the drive wheel connecting rod 36 is hinged to the first end of the drive disc connecting rod 32. The drive disc 31, drive wheel connecting rod 36, and drive disc connecting rod 32 constitute a crank-slider mechanism. When the drive disc 31 rotates, it drives the drive disc connecting rod 32 to move linearly via the drive wheel connecting rod 36.

[0024] The third implementation of driver component 3 is described below.

[0025] The drive assembly 3 in Embodiment 3 includes a lead screw and a nut. In this case, the lead screw is the input end of the drive assembly 3, and the nut is the output end. The lead screw is rotatably mounted on the chassis frame 1, and a gear meshes between the output end of the reducer 22 and the lead screw. That is, a driving gear is installed at the output end of the reducer 22, and a driven gear is installed on the lead screw; the driving gear meshes with the driven gear. The lead screw has two sections of external threads with opposite directions of rotation. A nut is fitted onto each section of the external thread. The nut is slidably connected to the chassis frame 1 and fixedly connected to the drive disc connecting rod 32. When the reducer 22 drives the lead screw to rotate, the two nuts on the lead screw move linearly, and the two nuts always move in opposite directions, thereby driving the drive disc connecting rod 32, which is fixedly connected to the nut, to move linearly, and the two drive disc connecting rods 32 always move in opposite directions.

[0026] like Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, the adjustment components 4 are arranged in two sets, one in front and one behind, with each set corresponding to one of the two drive disc connecting rods 32. The adjustment components 4 include universal joint connecting rods 41, universal joint connectors 42, and pitch sliders 43. Each set of adjustment components 4 includes two universal joint connecting rods 41 symmetrically arranged left and right. The first end of the universal joint connecting rod 41 is universally connected to the pitch slider 43, and the second end of the universal joint connecting rod 41 is universally connected to the drive disc connecting rod 32. The two sets of adjustment components 4 have a total of four pitch sliders 43, as shown... Figure 9 As shown, the variable pitch slider 43 has a hexahedral structure, with two of its sides serving as mounting surfaces. The first side of the variable pitch slider 43 has a short shaft with a threaded hole 431 on it. The second side of the variable pitch slider 43 has a threaded hole 432 and protrusions 433, which are evenly distributed on a circumference centered on the threaded hole 432.

[0027] To achieve a universal connection between the universal joint link 41 and the variable pitch slider 43, such as Figure 5 As shown, both ends of the universal joint link 41 are universally connected to universal joint connectors 42, such as... Figure 8 As shown, the universal joint connector 42 has a stud 421. The stud 421 on the universal joint connector 42 at the first end of the universal joint link 41 is threadedly connected to the threaded hole 431 on the slider of the variable pitch slider 43, thereby achieving a fixed connection between the universal joint connector 42 at the first end of the universal joint link 41 and the variable pitch slider 43. The stud 421 on the universal joint connector 42 at the second end of the universal joint link 41 is threadedly connected to the threaded hole 323 on the connecting rod at the second end of the drive disc connecting rod 32, thereby achieving a fixed connection between the universal joint connector 42 at the second end of the universal joint link 41 and the second end of the drive disc connecting rod 32.

[0028] like Figures 1 to 6 As shown, the pitch control assembly 5 includes four pitch control guide plates 51 and four electric push rods 53. The pitch control guide plates 51 are inclined vertically and horizontally relative to the chassis frame 1. Figure 5 As shown, the angle between the variable pitch guide plate 51 and the front-to-back direction is 45°, and the angle between the variable pitch guide plate 51 and the left-to-right direction is also 45°. The upper end of the variable pitch guide plate 51 is hinged to the chassis frame 1, and the electric push rod 53 is located between the lower end of the variable pitch guide plate 51 and the chassis frame 1. When the electric push rod 53 is activated, it drives the variable pitch guide plate 51 to swing relative to the chassis frame 1. Specifically, as... Figure 3 As shown, the chassis frame 1 has four first ear plates 11 and four second ear plates 12. The four first ear plates 11 are located at the four corners of the chassis frame 1, and the second ear plates 12 are fixed to the bottom of the chassis frame 1. Figure 10As shown, the variable pitch guide plate 51 is a rectangular metal plate. The lower end of the variable pitch guide plate 51 has a third lug 512, and a groove 511 is located at the center line of the variable pitch guide plate 51. The direction of the groove 511 is consistent with the inclination direction of the variable pitch guide plate 51. Figure 3 As shown, the upper end of the variable pitch guide plate 51 is hinged to the first ear plate 11 via the mounting shaft 52. The fixed part of the electric push rod 53 is hinged to the third ear plate 512, and the telescopic part of the electric push rod 53 is hinged to the second ear plate 12. The electric push rod 53, the chassis frame 1, and the variable pitch guide plate 51 form a triangle. When the telescopic part of the electric push rod 53 extends, the length of the side containing the electric push rod 53 increases, thus pushing the variable pitch guide plate 51 to rotate around the mounting shaft 52. Conversely, when the telescopic part of the electric push rod 53 retracts, the length of the side containing the electric push rod 53 decreases, thus pushing the variable pitch guide plate 51 to rotate in the opposite direction around the mounting shaft 52. When the electric push rod 53 drives the variable pitch guide plate 51 to rotate relative to the chassis frame 1, the four electric push rods 53 can operate simultaneously or individually. That is, all four electric push rods 53 can operate simultaneously, or one of the electric push rods 53 can operate, or two of the electric push rods 53 can operate, or three of the electric push rods 53 can operate. The actuation range of the four electric actuators 53 can be the same or different. That is, the displacement of the extension and retraction parts of the four electric actuators 53 is the same, or the displacement of the extension and retraction parts of two of the electric actuators 53 is the same and the displacement of the extension and retraction parts of the other two electric actuators 53 is the same or different, or the displacement of the extension and retraction parts of three of the electric actuators 53 is the same, or the displacement of the extension and retraction parts of all four electric actuators 53 is different. The four variable pitch guide plates 51 correspond one-to-one with the four variable pitch sliders 43. The variable pitch sliders 43 are slidably connected to the variable pitch guide plates 51 on the corresponding side, and the sliding direction is the tilt direction of the variable pitch guide plates 51. Specifically, the short shaft on the variable pitch slider 43 passes through the slide groove 511 and is slidably connected to the slide groove 511 to realize the sliding connection between the variable pitch slider 43 and the variable pitch guide plate 51 on the corresponding side.

[0029] The tilt angle adjustment of the variable pitch guide plate 51 is used to adjust the ratio of the lifting range of the chassis frame 1 to the wheel pitch change range. For example, the angle formed by the variable pitch guide plate 51 and the chassis support 1 is defined as the tilt angle of the variable pitch guide plate 51. When the tilt angle is 45°, the ratio of the lifting range of the chassis frame 1 to the wheel pitch change range is 1, meaning that the lifting range of the chassis frame 1, the wheel track change range of the wheel 64, and the wheelbase change range of the wheel 64 are equal. When the tilt angle is greater than 45°, the ratio of the lifting range of the chassis frame 1 to the wheel pitch change range is greater than 1, meaning that the lifting range of the chassis frame 1 is greater than the wheel track change range of the wheel 64 and also greater than the wheelbase change range of the wheel 64. When the tilt angle is less than 45°, the ratio of the lifting range of the chassis frame 1 to the wheel pitch change range is less than 1, meaning that the lifting range of the chassis frame 1 is less than the wheel track change range of the wheel 64 and also less than the wheelbase change range of the wheel 64.

[0030] like Figures 1 to 6 As shown, there are four wheel assemblies 6, and each of the four wheel assemblies 6 corresponds one-to-one with a pitch slider 43. Figure 3 As shown, wheel assembly 6 includes cantilever 61, steering motor 62, steering joint 63, and wheel 64, as... Figure 11 As shown, the first end of the cantilever 61 is the first connecting end 611, which has a circular hole 613 and a positioning groove 614. The positioning groove 614 is evenly distributed on a circumference with the circular hole 613 as the center. The second end of the cantilever 61 is the second connecting end 612. The first connecting end 611 is fixedly connected to the pitch slider 43 on the corresponding side. The main body of the steering motor 62 is fixedly connected to the second connecting end 612. The output shaft of the steering motor 62 is vertically arranged and passes through the second connecting end 612. The first end of the steering joint 63 is fixedly connected to the output shaft of the steering motor 62. The second end of the steering joint 63 is fitted with a wheel 64. When the output shaft of the steering motor 62 rotates, it drives the steering joint 63 to rotate in the horizontal plane, thereby driving the wheel 64 to achieve the steering function. During installation, the protrusion 433 on the pitch slider 43 is inserted into the positioning groove 614, which achieves relative fixation of the cantilever 61 and the pitch slider 43 in the circumferential direction. Then, the cantilever 61 and the variable pitch slider 43 are assembled and locked by a screw 65 that passes through the circular hole 613 and mates with the threaded hole 432 on the slider side.

[0031] The working principle of this invention is described below: (1) When the telescopic part of the electric push rod 53 extends, the tilt angle between the variable pitch guide plate 51 and the chassis frame 1 increases; when the telescopic part of the electric push rod 53 retracts, the tilt angle between the variable pitch guide plate 51 and the chassis frame 1 decreases. By adjusting the tilt angle between the variable pitch guide plate 51 and the chassis frame 1, the ratio of the lifting amplitude of the chassis frame 1 to the wheel pitch amplitude is adjusted. The electric push rod 53 can be started either before or after the power motor 21 starts; it can be started either before or during the movement of the entire lifting chassis.

[0032] (2) Start the power motor 21. The rotational motion output by the power motor 21 is reduced by the reducer 22 and transmitted to the coupling 23. The rotation of the coupling 23 drives the rotation of the drive disk 31. The rotation of the drive disk 31 drives the linear movement of the drive disk connecting rod 32, and the two drive disk connecting rods 32 move in opposite directions. When the front drive disk connecting rod 32 moves forward, the rear drive disk connecting rod 32 moves backward. When the front drive disk connecting rod 32 moves backward, the rear drive disk connecting rod 32 moves forward.

[0033] (3) The movement of the drive disc connecting rod 32 pushes or pulls the movement of the universal joint joint 42 connected to it. When the movement of the drive disc connecting rod 32 pushes the movement of the universal joint joint 42 connected to it, the pitch slider 43 at the first end of the universal joint connecting rod 41 moves obliquely upward along the pitch guide plate 51, and the distance between the chassis frame 1 and the wheel 64 decreases. At this time, the height of the chassis frame 1 decreases. At this time, the wheel assembly 6 fixedly connected to the pitch slider 43 moves obliquely away from the chassis frame 1. That is, the left front wheel assembly 6 moves to the left and front of the chassis frame 1, the left rear wheel assembly 6 moves to the left and rear of the chassis frame 1, the right front wheel assembly 6 moves to the right and front of the chassis frame 1, and the right rear wheel assembly 6 moves to the right and rear of the chassis frame 1. At this time, the distance between the left wheel assembly 6 and the right wheel assembly 6 increases, that is, the wheelbase increases; the distance between the front wheel assembly 6 and the rear wheel assembly 6 increases, that is, the wheelbase increases.

[0034] (4) When the drive disc connecting rod 32 pulls the universal joint joint 42 connected to it to move, the pitch slider 43 at the first end of the universal joint connecting rod 41 moves obliquely downward along the pitch guide plate 51, and the distance between the chassis frame 1 and the wheel 64 increases. At this time, the height of the chassis frame 1 increases. At this time, the wheel assembly 6 fixedly connected to the pitch slider 43 moves obliquely towards the chassis frame 1. That is, the left front wheel assembly 6 moves to the right and rear of the chassis frame 1, the left rear wheel assembly 6 moves to the right and front of the chassis frame 1, the right front wheel assembly 6 moves to the left and rear of the chassis frame 1, and the right rear wheel assembly 6 moves to the left and front of the chassis frame 1. At this time, the distance between the left wheel assembly 6 and the right wheel assembly 6 decreases, that is, the wheelbase decreases; the distance between the front wheel assembly 6 and the rear wheel assembly 6 decreases, that is, the wheelbase decreases.

[0035] In this invention, the wheel assembly 6 is fixedly connected to the pitch slider 43 of the adjusting assembly 4. The pitch slider 43 is slidably mounted on the pitch guide plate 51 of the pitch assembly 5. The pitch guide plate 51 is inclined both vertically and horizontally relative to the chassis frame 1. Therefore, when the pitch slider 43 slides along the pitch guide plate 51, it moves vertically, horizontally, and forward and backward relative to the chassis frame 1. This allows for adjustment of the distance between the wheel assembly 6 and the chassis frame 1 (i.e., chassis height), as well as the distance between the left and right wheel assemblies 6 (i.e., wheelbase) and the distance between the front and rear wheel assemblies 6 (i.e., wheelbase). This invention can adjust the chassis height, wheelbase, and wheelbase simultaneously, and achieve these adjustments in a single operation, thus adapting to complex road environments with potholes, obstacles, and width restrictions.

Claims

1. A variable wheelbase and track height lifting chassis, comprising a chassis frame, characterized in that, It also includes pitch control components, adjustment components, wheel components, drive components, and power components; The pitch control assembly includes a pitch control guide plate and an electric push rod. The pitch control guide plate is inclined vertically and horizontally relative to the chassis frame. The upper end of the pitch control guide plate is hinged to the chassis frame. The electric push rod is located between the lower end of the pitch control guide plate and the chassis frame. When the electric push rod is activated, it drives the pitch control guide plate to swing relative to the chassis frame. The adjustment components are arranged in two sets, one in front and one behind. The adjustment components include two universal joint rods arranged symmetrically on the left and right. The first end of the universal joint rod has a pitch slider. The pitch slider is slidably connected to the pitch guide plate on the corresponding side and the sliding direction is the tilt direction of the pitch guide plate. The input end of the drive component is connected to the power component, the output end of the drive component is connected to the second end of the universal joint link, the power component outputs rotational motion to the input end of the drive component, and the output end of the drive component performs linear motion with the motion trajectory being the front-rear direction of the chassis frame. The wheel assembly has four components, and each wheel assembly corresponds to one of the four pitch sliders. The wheel assembly includes a cantilever, a steering joint, a wheel, and a steering motor. The first end of the cantilever is fixedly connected to the pitch slider on the corresponding side, and the second end of the cantilever is connected to the wheel through the steering joint. The steering motor is fixed to the second end of the cantilever to drive the steering joint to rotate in the horizontal plane.

2. The variable wheelbase and wheelbase lifting chassis according to claim 1, characterized in that, The chassis frame has a first ear plate and a second ear plate. The lower end of the variable pitch guide plate has a third ear plate. The upper end of the variable pitch guide plate is hinged to the first ear plate via a mounting shaft. The fixed part of the electric push rod is hinged to the third ear plate, and the telescopic part of the electric push rod is hinged to the second ear plate.

3. The variable wheelbase and wheelbase lifting chassis according to claim 1, characterized in that, The power assembly includes a power motor and a reducer, both of which are fixed to the bottom of the chassis frame. The input end of the reducer is connected to the output shaft of the power motor, and the output end of the reducer is connected to the input end of the drive assembly.

4. A variable wheelbase and wheelbase lifting chassis according to claim 3, characterized in that, The input end of the drive assembly includes a drive disk, and the output end of the drive assembly includes a drive disk connecting rod. The output end of the reducer drives the rotation of the drive disk through a coupling. The drive disk connecting rod consists of two symmetrically arranged rods, and each of the two drive disk connecting rods corresponds to one of the two adjusting components. The first end of the drive disk connecting rod is connected to the drive disk, and the second end of the drive disk connecting rod is universally connected to the second end of the corresponding side universal joint connecting rod. The drive disk connecting rod is slidably connected to the chassis frame, and the sliding direction is the front-to-back direction.

5. A variable wheelbase and wheelbase lifting chassis according to claim 4, characterized in that, The drive disk is fixedly connected to the coupling, and the upper surface of the drive disk has a drive groove. With the center of the drive disk as the base point, the drive groove has two symmetrically arranged highest points and two symmetrically arranged lowest points. The first end of the drive disk connecting rod has a drive disk slider, which is slidably or rollingly disposed in the drive groove.

6. A variable wheelbase and wheelbase lifting chassis according to claim 4, characterized in that, The input end of the drive assembly also includes a drive wheel and two drive wheel connecting rods. The drive wheel is fixedly connected to a coupling. There are two drive discs symmetrically arranged front and back with the drive wheel as the center. The drive discs are rotatably connected to the chassis frame and the drive discs are geared to the drive wheels. Each drive disc has a drive wheel connecting rod between itself and the corresponding drive disc connecting rod. The first end of the drive wheel connecting rod is hinged to the corresponding drive disc connecting rod, and the second end of the drive wheel connecting rod is hinged to the corresponding drive disc connecting rod.

7. A variable wheelbase and wheelbase lifting chassis according to claim 1, characterized in that, Universal joint connectors are universally connected to both ends of the universal joint link. The universal joint connector at the first end of the universal joint link is fixedly connected to the pitch slider, and the universal joint connector at the second end of the universal joint link is fixedly connected to the second end of the drive disc link.

8. A variable wheelbase and wheelbase lifting chassis according to claim 1, characterized in that, The drive assembly includes a lead screw and a nut. The lead screw is the input end of the drive assembly, and the nut is the output end of the drive assembly. The lead screw is rotatably mounted on the chassis frame. The output end of the reducer is geared to the lead screw. The lead screw has two external threads with opposite directions. A nut is installed on each external thread. The nut is slidably connected to the chassis frame and fixedly connected to the corresponding drive disc connecting rod.

9. A variable wheelbase and wheelbase lifting chassis according to claim 1, characterized in that, The first end of the cantilever has a circular hole and a positioning groove. The positioning groove is evenly distributed on the circumference with the circular hole as the center. The side wall of the variable pitch slider has a slider-side threaded hole and a protrusion. The protrusion is evenly distributed on the circumference with the slider-side threaded hole as the center. The protrusion extends into the positioning groove to achieve relative fixation of the cantilever and the variable pitch slider in the circumferential direction. The cantilever and the variable pitch slider are locked and fixed by a screw that passes through the circular hole and mates with the slider-side threaded hole.

10. A variable wheelbase and wheelbase lifting chassis according to claim 1, characterized in that, The universal joint has a stud, and the universal joint is fixedly connected to the pitch slider or drive disc connecting rod through the stud.

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