Support wheel connecting structure of a car mover

Abstract

The application provides a support wheel connecting structure of a car mover, and belongs to the technical field of car movers. The support wheel connecting structure solves the problem of the inconvenience of the use of the existing car mover. The car mover comprises a main beam and a support wheel, the support wheel connecting structure comprises a mounting piece, the support wheel is rotationally connected to the mounting piece, the mounting piece is movably connected to the main beam through a connecting rod arm, a lifting mechanism is arranged between the end of the main beam and the mounting piece, the lifting mechanism comprises a screw rod and a nut, the main beam moves up and down relative to the support wheel through the cooperation of the screw rod and the nut, the screw rod and the nut can be separated from each other, and the mounting piece can move towards the middle part of the main beam after the screw rod and the nut are separated from each other. The application can realize high-speed and long-distance driving, is more convenient and labor-saving to operate, can reduce the operation difficulty, and greatly shortens the rescue time of the trailer.

Description

Technical Field

[0001] This invention belongs to the field of vehicle mover technology and relates to a support wheel connection structure for a vehicle mover. Background Technology

[0002] With the continuous development of society, cars have become an indispensable means of transportation for people's daily travel. If a car breaks down while driving, it is necessary to use a car mover to move the car to a safe area or to a repair shop for repairs.

[0003] A car mover, also called a rescue vehicle, mainly consists of a support frame and support wheels for supporting the support frame. The support frame includes a main beam and lifting rods that are perpendicularly connected to the main beam. Usually, there are two lifting rods, which are arranged one in front of the other and spaced apart. This allows the car's wheels to be placed on the two lifting rods, thus enabling the car to be moved by the car mover.

[0004] Existing vehicle movers, such as the assembled car rescue trailer disclosed in patent literature (application number: CN201220225740), assemble and adjust the trailer frame using pins or tightening bolts. The trailer frame has casters at the bottom, and the wheels are secured using tie-down straps and tie-down strap tighteners. Two adjustable trailer bars connect the trailer to the towing vehicle. However, this rescue trailer cannot lift the car's wheels itself; instead, a jack is required to lift the car and place it on the trailer frame. Therefore, this trailer frame is cumbersome to use, making the towing and rescue process time-consuming and labor-intensive.

[0005] Currently, to enable car movers to automatically lift car wheels and improve ease of use, the conventional technique involves positioning the two lifting rods on the front and rear sides of the wheel, respectively. A drive mechanism then shortens the distance between the two rods to lift the wheel. Furthermore, when the car mover is not in use, existing technology allows the two lifting rods to move closer together, reducing the size of the car mover when stored. For example, patent application number 202021775915.7, "Portable Car Mover with Ratchet Mechanism," uses a first forked pawl of the active ratchet and a gear to mesh with a rack on the upper surface of the left crossbeam with a rack, causing the two support arms to move closer together and compress and lift the car wheel. Another example is patent application number 202222162180.6, "A Car Mover," which uses a drive screw to rotate, gradually closing the distance between the two support beams to lift the car wheel. Summary of the Invention

[0006] The purpose of this invention is to address the aforementioned problems with existing technologies by proposing a car mover. The technical problem to be solved by this invention is to resolve the inconvenience of using existing car movers while simultaneously making the car mover smaller in size.

[0007] The objective of this invention can be achieved through the following technical solution: a support wheel connection structure for a car mover, the car mover comprising a main beam and support wheels, characterized in that the support wheel connection structure includes an mounting component, the support wheel being rotatably connected to the mounting component, the mounting component being movably connected to the main beam via a connecting rod arm, and a lifting mechanism being provided between the end of the main beam and the mounting component, the lifting mechanism comprising a lead screw and a nut, and the main beam being able to move up and down relative to the support wheel through the mutual cooperation of the lead screw and the nut, the lead screw and the nut being able to disengage from each other, and after the lead screw and the nut are disengaged, the mounting component being able to move towards the middle of the main beam.

[0008] This vehicle mover utilizes a lifting mechanism between the end of the main beam and the mounting component. Through the interaction of a screw and nut, the main beam moves up and down relative to the support wheels, causing the lifting rod connected to the main beam to move up and down as well. When it moves upward, it lifts the car's wheels, allowing the disabled vehicle to be moved. Therefore, this vehicle mover eliminates the need for a jack to lift the car's wheels off the ground, making operation more convenient and labor-saving, reducing operational difficulty, and significantly shortening towing time.

[0009] When the car mover is not in use, the lead screw and nut can disengage, allowing the support wheels to retract inwards, thus reducing the size of the car mover. Furthermore, because the mounting component is connected to the main beam via a connecting arm, even after the lead screw and nut disengage, the support wheels remain connected to the main beam via the connecting arm. This ensures that the support wheels maintain a certain balance and good stability during inward or outward retraction, preventing accidental tipping or deviation from the main beam. This makes the retraction and deployment of the support wheels smooth and convenient. Moreover, when the car mover needs to be used to deploy the support wheels outwards, it facilitates the reconnection of the lead screw and nut, allowing the lead screw to quickly re-enter the nut, thus enabling convenient car lifting operations.

[0010] Clearly, this vehicle mover not only has a small storage size but is also easy to operate, which can greatly shorten the operation time of towing rescue.

[0011] In the aforementioned support wheel connection structure of the car mover, the lead screw is vertically positioned and fixed to the mounting component, while the nut is axially fixed and circumferentially rotatable within the main beam, with the lead screw passing through the nut. Because the mounting component is connected to the support wheel, and the lead screw is fixed to the mounting component, preventing it from moving up and down, the nut moves up and down on the lead screw during rotation, thereby driving the main beam and lifting rod to move up and down, thus lifting or lowering the car wheels. Furthermore, since the lead screw in this car mover does not rotate, the danger posed by an exposed lead screw rotation is avoided, resulting in a high level of operational safety for this car mover.

[0012] In the above-mentioned support wheel connection structure of the vehicle mover, the support wheel is located on the outside of the main beam, the side wall of the main beam facing the support wheel is the outer wall, and the mounting component includes a vertically arranged guide plate that abuts against the outer wall of the main beam.

[0013] During use, the lifting rod on the main beam needs to extend under the car chassis to place the car's wheels on the lifting rod. The support wheels, located on the outside of the main beam, are not under the car chassis, allowing for the use of larger support wheels and facilitating high-speed, long-distance movement. Furthermore, because the support wheels are located on the outside of the main beam rather than at its bottom, even with larger support wheels, the main beam can be lowered to a lower height, ensuring that the lifting rod under the car chassis can connect with the main beam when the car is not fully lifted.

[0014] The guide plate is attached to the outer wall of the main beam, and has the following functions:

[0015] ① Because the lead screw is fixedly connected to the mounting part on the guide plate, and the guide plate is in contact with the outer wall of the main beam, the lead screw is prevented from rotating. Therefore, during the process of rotating the nut to raise and lower the main beam, the lead screw and guide plate will not rotate together, thus preventing the support wheels from deviating and ensuring that the four support wheels of the vehicle mover always move in the same direction. That is, the front two support wheels are coaxial, the rear two support wheels are coaxial, and the center lines of the front and rear support wheels are parallel. This configuration allows the vehicle mover to travel at high speeds and ensures its stability at high speeds. Of course, high-speed travel here does not refer to driving on a highway, but rather to a relatively high speed.

[0016] ② During the process of the main beam moving up and down by rotating the nut, after the guide plate comes into contact with the outer wall of the main beam, the guide plate can guide the main beam to move up and down, so that the main beam can be raised and lowered stably, thus improving the operational stability of this vehicle mover.

[0017] In the aforementioned support wheel connection structure of the vehicle mover, one end of the linkage arm is slidably connected to the main beam along its length, and this end is the sliding end of the linkage arm. The other end of the linkage arm is a hinged end, which is hinged to the mounting component, allowing the sliding end of the linkage arm to swing up and down relative to its hinged end. The sliding end of the linkage arm is slidably connected to the main beam along its length, allowing the support wheel to smoothly slide towards the center of the main beam after the lead screw and nut disengage, thus facilitating the retraction of the support wheel. The hinged end of the linkage arm is hinged to the mounting component, allowing the sliding end of the linkage arm to swing up and down relative to its hinged end during the up-and-down movement of the main beam. Simultaneously, after the lead screw and nut disengage, the linkage arm restricts the movement of the mounting component and the support wheel away from the main beam, thereby making the retraction and unfolding process of the support wheel more stable and smooth.

[0018] In the aforementioned support wheel connection structure of the car mover, the main beam is a hollow beam with a rectangular cross-section. The guide plate has a mounting portion located on the upper side of the main beam. The upper end of the lead screw is fixed to the mounting portion, and the lower end of the guide plate is lower than the lower end of the lead screw. The guide plate is parallel to and abuts against the outer wall of the main beam. By providing a mounting portion on the guide plate located on the upper side of the main beam, the installation of the lead screw is facilitated, while ensuring the installation accuracy of the lead screw, thereby improving the fit accuracy between it and the nut, enabling the car mover to perform stable lifting and lowering.

[0019] The main beam has a rectangular cross-section, and the guide plate is parallel to and abuts against the outer wall of the main beam, resulting in a large contact area between the guide plate and the main beam. This enhances the guiding effect of the guide plate during the up-and-down movement of the main beam, making the main beam move more stably. Since the lower end of the guide plate is lower than the lower end of the lead screw, when the main beam moves downwards until the lead screw disengages from the nut and the main beam, the lower end of the guide plate still rests against the outer wall of the main beam. This improves the stability of the translation process when moving the support wheels inwards or outwards. Furthermore, when using the car mover to move and unfold the support wheels outwards, the lower end of the guide plate abuts against the outer wall of the main beam, allowing for easy connection of the lead screw and nut. Only the position of the lead screw relative to the length of the main beam needs to be adjusted, without needing to adjust its position relative to the width of the main beam. This allows for quick connection of the lead screw and nut, making it easy for the lead screw to insert into the nut and facilitating the lifting operation of the car using this car mover.

[0020] In the aforementioned support wheel connection structure of the vehicle mover, a strip groove is formed on the outer wall of the main beam. The length direction of the strip groove is consistent with the length direction of the main beam, and the sliding end of the connecting rod arm is slidably connected to the strip groove through a sliding member. Since the main beam is a hollow beam, the sliding connection between the connecting rod arm and the main beam is achieved by forming a strip groove, which is relatively convenient to manufacture and can save manufacturing costs.

[0021] In the aforementioned support wheel connection structure of the vehicle mover, one end of the strip groove is located in the middle of the main beam, and this end has a positioning recess into which a sliding member can be inserted. By inserting the sliding member into the positioning recess, the support wheel can remain in a retracted state after it moves inward and retracts, instead of automatically unfolding outward.

[0022] In the aforementioned support wheel connection structure of the vehicle mover, an upper mounting hole is provided on the top surface of the main beam end, and a lower mounting hole is provided on the bottom surface of the main beam end. An upper limit sleeve, fixedly connected to the main beam, is installed in the upper mounting hole. The lower end of the upper limit sleeve extends into the main beam, and the upper end of the nut is inserted into the upper limit sleeve, while the lower end of the nut is inserted into the lower mounting hole. This design allows the nut to rotate stably while fixing its axial position. Furthermore, because the lower end of the upper limit sleeve extends into the main beam and the upper end of the nut is inserted into the upper limit sleeve, the length of the nut is shortened, allowing it to be placed inside the main beam. Specifically, during installation, simply place the nut into the main beam first, inserting the lower end of the nut into the lower mounting hole, then install the upper limit sleeve into the upper mounting hole, inserting the upper end of the nut into the upper limit sleeve, and finally fix the upper limit sleeve. This completes the installation of the nut inside the main beam, making installation very convenient.

[0023] In the aforementioned support wheel connection structure of the car mover, the main beam contains a drive shaft aligned with its length. Both ends of the drive shaft protrude from the end faces of the main beam, and the end of the drive shaft has a helical tooth segment. The outer peripheral wall of the nut has worm gear teeth that mesh with the helical tooth segment. Preferably, the portion of the drive shaft protruding from the end face of the main beam is hexagonal, facilitating the connection of an electric wrench. In use, the electric wrench drives the drive shaft to rotate, causing the drive shaft to rotate the nut. Since the lead screw cannot move up or down, the rotation of the nut simultaneously moves the main beam and lifting rod up and down, thus lifting or lowering the car. Of course, if an electric wrench is unavailable, a regular wrench can be used to rotate the drive shaft.

[0024] In the aforementioned support wheel connection structure of the vehicle mover, an axle is connected to the side wall of the guide plate facing away from the main beam, and the support wheel is rotatably connected to the axle. This design facilitates the connection between the support wheel and the mounting components and ensures the stability of the support wheel installation.

[0025] Compared with existing technologies, the support wheel connection structure of this vehicle mover has the following advantages:

[0026] 1. Since the support wheels of this car mover are not located under the car chassis, but on the outside of the car wheels during use, larger support wheels can be used, thus enabling high-speed and long-distance travel.

[0027] 2. This car mover uses relatively large support wheels, so reducing its storage size is crucial. This design employs a structure where the lead screw and nut can disengage, and a connecting arm connects the main beam to the mounting components. This allows the support wheels to be moved towards the center of the main beam when the car mover is not in use, reducing the distance between the two support wheels and thus decreasing the storage size of the car mover.

[0028] 3. This vehicle mover uses a lifting mechanism between the end of the main beam and the mounting component. The main beam moves up and down relative to the support wheels through the cooperation of the screw and nut. Therefore, this vehicle mover does not require a jack to lift the car and lift the wheels off the ground. It is more convenient and labor-saving to operate, reduces the difficulty of operation, and greatly shortens the time for towing rescue. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the car mover.

[0030] Figure 2 This is a three-dimensional structural diagram of the support wheel connection structure.

[0031] Figure 3 This is a structural diagram of the main beam connecting two support wheels.

[0032] Figure 4 This is a structural diagram of the main beam section behind the hidden support wheel.

[0033] Figure 5 This is a sectional view of the end position of the main beam.

[0034] Figure 6 This is a structural diagram of the lifting mechanism.

[0035] Figure 7 This is a front view of the screw rod on the mounting component after it has detached from the main beam.

[0036] Figure 8 This is a front view of the mounting components and support wheels after they have been moved inward and retracted.

[0037] Figure 9 This is a schematic diagram showing the rear view of a car after it has been lifted using this car mover.

[0038] In the diagram, 1 is the main beam; 1a is the outer side wall; 2 is the support wheel; 3 is the mounting component; 31 is the guide plate; 32 is the mounting part; 33 is the wheel axle; 4 is the connecting rod arm; 41 is the sliding end; 42 is the hinge end; 5 is the lead screw; 6 is the nut; 61 is the worm gear; 7 is the strip groove; 71 is the positioning notch; 8 is the upper mounting hole; 9 is the lower mounting hole; 10 is the upper limit sleeve; 11 is the drive shaft; 111 is the helical gear segment; 12 is the lifting rod; 13 is the hook seat; 14 is the sliding component; and 15 is the handle. Detailed Implementation

[0039] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0040] like Figure 1 As shown, this vehicle mover includes two parallel lifting rods 12 and two main beams 1 perpendicular to the lifting rods 12. The two lifting rods 12 are located between the two main beams 1, and both ends of the lifting rods 12 are detachably connected to the two main beams 1. Each main beam 1 has support wheels 2 at both ends. Specifically, as shown... Figure 2 As shown, each main beam 1 is equipped with two mounting brackets 13. The end of the lifting rod 12 can be hung on the mounting bracket 13 from above and below. When the main beam 1 moves upward, it can drive the lifting rod 12 upward as well. When it is necessary to remove the lifting rod 12, simply lift the lifting rod 12 upward so that the end of the lifting rod 12 is detached from the mounting bracket 13. In this car mover, the length of the lifting rod 12 is adjustable, which makes this car mover usable on cars of different widths, thus increasing its versatility. The length adjustment of the lifting rod 12 can adopt a telescopic structure similar to an umbrella handle, with locking pins to lock it when it is extended to different lengths.

[0041] like Figure 2 and Figure 3 As shown, the support wheel connection structure includes a mounting component 3, with the support wheel 2 rotatably connected to the mounting component 3. The mounting component 3 is movably connected to the main beam 1 via a connecting rod arm 4. A lifting mechanism is provided between the end of the main beam 1 and the mounting component 3. This lifting mechanism includes a lead screw 5 and a nut 6, and the main beam 1 moves up and down relative to the support wheel 2 through the cooperation of the lead screw 5 and the nut 6. The lead screw 5 and the nut 6 can disengage from each other, and after the lead screw 5 and the nut 6 disengage from each other, the mounting component 3 can move towards the middle of the main beam 1.

[0042] like Figure 2 and Figure 4As shown, the main beam 1 is a hollow beam with a rectangular cross-section. The support wheel 2 is located on the outside of the main beam 1. The side wall of the main beam 1 facing the support wheel 2 is the outer wall 1a. The mounting component 3 includes a vertically arranged guide plate 31. The upper end of the guide plate 31 has a mounting part 32 located on the upper side of the main beam 1. The lead screw 5 is vertically arranged, and the upper end of the lead screw 5 is fixed to the mounting part 32. The nut 6 is axially fixed and circumferentially rotatable inside the main beam 1. The lead screw 5 passes through the nut 6. The lower end of the guide plate 31 is lower than the lower end of the lead screw 5. The guide plate 31 is parallel to and abuts against the outer wall 1a of the main beam 1. The vertical arrangement here does not only refer to an absolutely vertical state, which is an angle of 90 degrees with the horizontal plane. The vertical arrangement here can also be an angle deviation of about 3 degrees from the absolutely vertical state. By setting a guide plate, the main beam 1 can be guided during its up and down movement, enabling it to rise and fall stably. Furthermore, when the main beam 1 is raised and lowered by rotating the nut 6, the lead screw 5 and the guide plate 31 will not rotate together, thus preventing the support wheel 2 from deviating.

[0043] like Figure 4 As shown, one end of the connecting arm 4 is slidably connected to the main beam 1 along its length, and this end is the sliding end 41 of the connecting arm 4. The other end of the connecting arm 4 is the hinge end 42. The hinge end 42 of the connecting arm 4 is hinged to the mounting part 3, allowing the sliding end 41 of the connecting arm 4 to swing up and down relative to its hinge end 42. The end of the sliding end 41 of the connecting arm is parallel to and abuts against the outer side wall 1a of the main beam 1, and the end of the hinge end 42 of the connecting arm 4 is parallel to and abuts against the side wall of the guide plate 31 facing away from the main beam 1. The sliding end 41 of the connecting arm 4 is slidably connected to the main beam 1 along its length, so that when the lead screw 5 and the nut 6 disengage, the support wheel 2 can smoothly slide towards the middle of the main beam 1, thereby smoothly retracting the support wheel 2.

[0044] like Figure 4 As shown, a strip groove 7 is formed on the outer wall 1a of the main beam 1. The length direction of the strip groove 7 is consistent with the length direction of the main beam 1. The sliding end 41 of the connecting arm 4 is slidably connected to the strip groove 7 through the sliding member 14. In the above-mentioned support wheel connection structure of the vehicle mover, one end of the strip groove 7 is located in the middle of the main beam 1 and this end has a positioning recess 71 into which the sliding member 14 can be inserted. By inserting the sliding member 14 into the positioning recess 71, the support wheel 2 can remain in the retracted state after it is laterally retracted inward, and will not automatically unfold outward.

[0045] like Figure 5As shown, an upper mounting hole 8 is provided on the top surface of the end of the main beam 1, and a lower mounting hole 9 is provided on the bottom surface of the end of the main beam 1. An upper limit sleeve 10, which is fixedly connected to the main beam 1, is provided in the upper mounting hole 8. The lower end of the upper limit sleeve 10 extends into the main beam 1, and the upper end of the nut 6 is inserted into the upper limit sleeve 10. The lower end of the nut 6 is inserted into the lower mounting hole 9. Because the lower end of the upper limit sleeve 10 extends into the main beam 1 and the upper end of the nut 6 is inserted into the upper limit sleeve 10, the length of the nut 6 can be shortened, allowing the nut 6 to be placed into the main beam 1. Specifically, during installation, simply place the nut 6 into the main beam 1 so that the lower end of the nut 6 is inserted into the lower mounting hole 9, then install the upper limit sleeve 10 into the upper mounting hole 8 so that the upper end of the nut 6 is inserted into the upper limit sleeve 10, and then fix the upper limit sleeve 10. This completes the installation of the nut 6 in the main beam 1, making the installation very convenient. Preferably, a retractable support pin can be provided on the guide plate. When the main beam 1 and the lifting rod 12 move upward to lift the car wheels, the support pin can extend and contact the bottom surface of the main beam 1, thereby supporting the main beam 1. This reduces the load on the lead screw 5 and prevents wear on the lead screw 5 and nut 6. When it is necessary to lower the main beam 1, the support pin can retract. After retraction, the support pin is no longer located below the main beam 1, thus allowing the main beam 1 to move downward.

[0046] like Figure 6 As shown, the main beam 1 has a drive shaft 11 running parallel to its length. Both ends of the drive shaft 11 extend out of the end faces of the main beam 1, and the end of the drive shaft 11 has a helical tooth segment 111. The outer peripheral wall of the nut 6 has turbine teeth 61 that mesh with the helical tooth segment 111. Preferably, the portion of the drive shaft 11 extending out of the end face of the main beam 1 is hexagonal, which facilitates the connection of an electric wrench. An axle 33 is connected to the side wall of the guide plate 31 facing away from the main beam 1, and the support wheel 2 is rotatably connected to the axle 33.

[0047] The following describes how to operate this car mover:

[0048] Before use, the main beam 1 and the support wheel 2 are connected together, but the two lifting rods 12 are not installed on the main beam 1. During use, after the lead screw 5 on the guide plate and the nut 6 on the main beam 1 are connected, the two main beams 1 connected to the support wheel 2 are placed on the outside of the left and right wheels of the car, respectively.

[0049] Next, the two lifting rods 12 are respectively attached to the main beam 1. The two lifting rods 12 are placed on the front and rear sides of the wheel to be lifted, respectively. The distance between the two lifting rods 12 is less than the outer diameter of the wheel. At this time, the two lifting rods 12 are connected with the left and right main beams 1 to form a "tray state".

[0050] Then, by rotating the drive shaft 11 with an electric or ordinary wrench, the main beam 1 moves upward along with the lifting rod 12, thereby lifting the car wheels off the ground, forming a shape like... Figure 9 The state shown indicates that the vehicle mover is in the following state: Figure 1 As shown, after the car wheels are lifted, the four support wheels 2 of the vehicle mover take over its driving function, thereby enabling towing and rescue work for the disabled vehicle.

[0051] When the disabled vehicle is moved to the designated location, the drive shaft 11 is rotated in the reverse direction using an electric wrench or a regular wrench, causing the lifting rod 12 to move downwards until the car's wheels touch the ground. After that, both lifting rods 12 can be removed.

[0052] To reduce the storage size of the vehicle mover, the support wheels 2 on the main beam 1 can be folded inwards. Specifically, the drive shaft 11 is rotated, causing the main beam 1 to move downwards until the lead screw 5 disengages from the nut 6 and the main beam 1, forming a... Figure 7 In the state shown, the support wheel 2 can be moved towards the center of the main beam 1, ultimately forming the shape shown. Figure 8 In the state shown, the two support wheels 2 can be brought together, thus reducing the storage size of the vehicle mover. A handle 15 is provided on the main beam 1, making it easy to lift the main beam 1 and the support wheels 2 connected to it. Conversely, when the vehicle mover needs to be used, simply move the support wheels 2 outwards and then reconnect the lead screw 5 to the nut 6; the operation is very convenient.

[0053] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0054] Although this document frequently uses terms such as 1. main beam; 2. support wheel; 3. mounting component; 31. guide plate; 32. mounting part; 33. wheel axle; 4. connecting rod arm; 41. sliding end; 42. hinge end; 5. lead screw; 6. nut; 61. worm gear; 7. strip groove; 71. positioning notch; 8. upper mounting hole; 9. lower mounting hole; 10. upper limit sleeve; 11. drive shaft; 111. helical tooth segment; 12. lifting rod; 13. hook seat; 14. sliding component; 15. handle, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A support wheel connection structure for a car mover, the car mover comprising a main beam (1) and support wheels (2), characterized in that, This support wheel connection structure includes an installation component (3), on which the support wheel (2) is rotatably connected. The installation component (3) is movably connected to the main beam (1) via a connecting rod arm (4). A lifting mechanism is provided between the end of the main beam (1) and the installation component (3). This lifting mechanism includes a lead screw (5) and a nut (6), and the main beam (1) moves up and down relative to the support wheel (2) through the cooperation of the lead screw (5) and the nut (6). The lead screw (5) and the nut (6) can disengage from each other, and after disengagement, the installation component (3) can move towards the middle of the main beam (1). The lead screw (5) is vertically arranged and fixed to the installation component (3), and the nut (6) is axially fixed. The circumferentially rotating part is set inside the main beam (1). The lead screw (5) passes through the nut (6). One end of the connecting arm (4) is slidably connected to the main beam (1) along the length direction of the main beam (1) and this end is the sliding end (41) of the connecting arm (4). The other end of the connecting arm (4) is the hinge end (42). The hinge end (42) of the connecting arm (4) is hinged to the mounting part (3) so that the sliding end (41) of the connecting arm (4) can swing up and down relative to its hinge end (42). A strip groove (7) is provided on the outer side wall (1a) of the main beam (1). The length direction of the strip groove (7) is consistent with the length direction of the main beam (1). The sliding end (41) of the connecting arm (4) is slidably connected to the strip groove (7) through the sliding part (14).

2. The support wheel connection structure of the vehicle mover according to claim 1, characterized in that, The support wheel (2) is located on the outside of the main beam (1), and the side wall of the main beam (1) facing the support wheel (2) is the outer wall (1a). The mounting component (3) includes a vertically arranged guide plate (31), and the guide plate (31) is in contact with the outer wall (1a) of the main beam (1).

3. The support wheel connection structure of the vehicle mover according to claim 2, characterized in that, The main beam (1) is a hollow beam with a rectangular cross-section. The guide plate (31) has a mounting part (32) located on the upper side of the main beam (1). The upper end of the screw (5) is fixed to the mounting part (32). The lower end of the guide plate (31) is lower than the lower end of the screw (5). The guide plate (31) is parallel to and abuts against the outer side wall (1a) of the main beam (1).

4. The support wheel connection structure of the vehicle mover according to claim 1, 2, or 3, characterized in that, One end of the strip groove (7) is located in the middle of the main beam (1) and has a positioning notch (71) into which the sliding member (14) can be inserted.

5. The support wheel connection structure of the vehicle mover according to claim 2 or 3, characterized in that, An upper mounting hole (8) is provided on the top surface of the end of the main beam (1), and a lower mounting hole (9) is provided on the bottom surface of the end of the main beam (1). An upper limit sleeve (10) is provided in the upper mounting hole (8) and is fixedly connected to the main beam (1). The lower end of the upper limit sleeve (10) extends into the main beam (1) and the upper end of the nut (6) is inserted into the upper limit sleeve (10). The lower end of the nut (6) is inserted into the lower mounting hole (9).

6. The support wheel connection structure of the vehicle mover according to claim 2 or 3, characterized in that, The main beam (1) is provided with a drive shaft (11) that is aligned with its length direction. The two ends of the drive shaft (11) pass through the two end faces of the main beam (1). The end of the drive shaft (11) has a helical tooth segment (111). The outer peripheral wall of the nut (6) has a turbine tooth (61) that meshes with the helical tooth segment (111).

7. The support wheel connection structure of the vehicle mover according to claim 2 or 3, characterized in that, The guide plate (31) is connected to an axle (33) on the side wall facing away from the main beam (1), and the support wheel (2) is rotatably connected to the axle (33).

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