Wheels with adjustable tire width

Abstract

The present application discloses a wheel with adjustable tire width, comprising a steel ring and a tire arranged on the steel ring, wherein the steel ring is connected to a center disk through a support, and a plurality of pressure rods are respectively hinged on the axial end faces of the steel ring, and the pressure rods are distributed along the circumference of the steel ring, and a pressure plate for squeezing the tire is connected to one end of the pressure rod away from the center disk; a driving disk is respectively arranged at the axial end faces of the center disk, and one end of the pressure rod on each side close to the center disk is connected to the driving disk on the same side arranged at the center of the center disk, and the driving disk can move along the axial direction of the center disk, and the movement of the driving disk can drive the pressure rod to drive the pressure plate to squeeze the tire. The driving disk is driven toward a direction away from the center disk by a driving mechanism, so that the other end of the pressure rod can be driven together with the pressure plate to squeeze the end of the tire close to the steel ring, and the width of the end of the tire close to the steel ring is reduced after being squeezed, so that the width of the end of the tire away from the steel ring is increased, thereby realizing the width adjustment of the end of the tire in contact with the ground.

Description

Technical Field

[0001] The invention relates to a wheel, in particular to a wheel with adjustable tire width. Background Art

[0002] When a vehicle is driving, the rotation of the wheels drives the vehicle to move. The friction between the tires and the ground drives the vehicle to move. The friction between the tires and the ground is related to the width of the tires. If the tires are wide, the contact area with the ground increases, thereby increasing the grip. If the tires are narrow, the contact area between the wheels and the ground is small, and the friction is small, which makes it easier to accelerate and turn.

[0003] At present, when vehicles are driving, due to the complex road conditions, there are muddy roads, roads with soft soil and flat roads, so vehicles sometimes drive on flat roads and sometimes need to drive on muddy roads. When driving on muddy roads, wider tires are needed to provide greater friction, and when driving on flat roads, narrower tires are needed to achieve acceleration and steering, etc. However, the current tire size is fixed and cannot be adjusted during driving. Summary of the invention

[0004] The purpose of the present application is to provide a wheel and a cart with adjustable tire width to solve the problem that the tire width cannot be adjusted during the driving of the wheel.

[0005] The present application provides a wheel with adjustable tire width, which adopts the following technical solution:

[0006] A wheel with adjustable tire width comprises a steel rim and a tire arranged on the steel rim, wherein the steel rim is connected to a center disk via a support, and a plurality of pressure rods are hinged on both axial end surfaces of the steel rim, the pressure rods are distributed along the circumference of the steel rim, and one end of the pressure rods away from the center disk is connected to a pressure plate for squeezing the tire; a driving disk is arranged on each axial end surface of the center disk, and one end of the pressure rods on each side close to the center disk is connected to the driving disk on the same side arranged at the center of the center disk, and the driving disk can move along the axial direction of the center disk, and the movement of the driving disk can drive the pressure rods to drive the pressure plates to squeeze the tire.

[0007] Through the above technical scheme, the pressure rod is hinged with the steel rim to form a lever structure, and the driving mechanism drives the driving disk toward the direction away from the center disk, so that the other end of the pressure rod can be driven together with the pressure plate to squeeze the end of the tire close to the steel rim. After the end of the tire close to the steel rim is squeezed, its width is reduced, and then the width of the end of the tire away from the steel rim is increased, so that the width of the end of the tire that contacts the ground can be adjusted; because the pressure rod is hinged to the steel rim, the pressure end of the pressure rod is shorter than the hinge point, so that the force applied by the pressure end is larger, and there is enough force to squeeze the tire.

[0008] Optionally, a connecting shaft for connecting to a vehicle frame is arranged on the central disk, and a driving disk is slidably arranged on the connecting shaft, and the driving disk can slide on the connecting shaft.

[0009] Through the above technical solution, the wheel can be connected to the frame through the connecting shaft, and the driving plate is arranged to be slidable on the connecting shaft, thereby providing a guiding effect for the driving plate.

[0010] Optionally, a slide groove is further provided on the outer circumferential surface of the connecting shaft, and the slide groove is distributed along the axial direction of the connecting shaft. A guide block is also provided on the driving disk, and the guide block is arranged in the slide groove.

[0011] Through the above technical solution, the drive disk is sleeved on the connecting shaft and cooperates with the slide groove through the guide block thereon, so that the drive disk can only slide on the connecting shaft and cannot rotate around the connecting shaft, so that the installation position of the drive disk is accurate and unique, which facilitates the quick installation and positioning of the drive disk.

[0012] Optionally, the pressure rod is hingedly connected to the driving disk, and the pressure rod is a retractable structure.

[0013] Through the above technical solution, the pressure rod is set as a retractable structure. When the driving disk moves to drive the pressure rod to rotate around the hinge point on the steel ring, the pressure rod can compensate for the length by retracting, which can prevent the pressure rod from getting stuck when the driving disk moves.

[0014] Optionally, the pressure rod includes a first pressure rod and a second pressure rod, the first pressure rod is provided with a slot, one end of the second pressure rod is arranged in the slot, and the end of the second pressure rod extending into the slot is connected to the first pressure rod through a compression spring.

[0015] With the above technical solution, the second pressure rod moves in the slide groove of the first pressure rod, so that the length of the pressure rod can be changed, and the spring between the first pressure rod and the second pressure rod keeps the first pressure rod and the second pressure rod in a tensioned state at all times.

[0016] Optionally, the pressure plate is an arc-shaped structure, and a plurality of pressure plates on the same side of the steel ring form a circular structure.

[0017] Through the above technical solution, a plurality of pressure plates form a circular structure, so that when the pressure plates apply pressure to the tire, the pressure plates can cover the entire circumference of the tire, thereby improving the squeezing effect.

[0018] Optionally, the pressure plates distributed on both axial end surfaces of the steel ring are of symmetrical structure, and the pressure rods distributed on both axial end surfaces of the steel ring are also of symmetrical structure.

[0019] Through the above technical solution, by setting the pressure plate and the pressure rod into a symmetrical structure, the entire tire squeezed part is made into a symmetrical structure, thereby improving the uniformity of the force applied to the tire when squeezed.

[0020] Optionally, each driving disk is connected to a connecting disk, an annular groove is arranged on the connecting disk, the annular groove is arranged concentrically with the center disk, a connecting sleeve is arranged in the annular groove, the connecting sleeve can slide in the annular groove and cannot be separated from the annular groove.

[0021] Through the above technical solution, an external driving mechanism such as a cylinder, a linear motor, etc. is fixedly connected to the connecting sleeve. During the rotation of the connecting shaft together with the wheel, the connecting sleeve remains stationary, and at the same time, the connecting sleeve rotates relative to the connecting disk. While the wheel rotates, the connecting sleeve can be driven by the external driving mechanism to move away from the center disk, thereby driving the connecting disk together with the driving disk to slide on the connecting shaft, and then driving the pressure rod to move.

[0022] Optionally, a mounting groove connected to the annular groove is further provided on the connecting plate, and a blocking block for blocking the mounting groove is also provided on the mounting groove.

[0023] Through the above technical solution, the connecting plate can be installed from the installation groove into the annular groove, and the installation groove can be blocked by the blocking block, thereby ensuring that the connecting sleeve will not separate from the annular groove when the annular groove rotates.

[0024] On the second aspect, the present application also discloses a cart, including a cart body, on which a frame for fixing wheels is provided, the frame is connected to the connecting shaft of the wheel via a bearing, the wheel is the above-mentioned wheel with adjustable tire width, and a driving mechanism for driving the driving disc is also provided on the frame.

[0025] Through the above technical solution, the driving mechanism on the frame drives the driving plate to move, so that the driving plate can drive one end of the pressure rod to move, and the other end of the pressure rod together with the pressure plate squeezes the end of the tire close to the steel rim. After the end of the tire close to the steel rim is squeezed, its width is reduced, and then the width of the end of the tire away from the steel rim is increased, so that the width of the end of the tire that contacts the ground can be adjusted.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. The present application forms a lever structure by setting a pressure rod hinged to the steel rim, connecting the pressure plate and the steel rim, and driving the driving disk toward the direction away from the center disk through the driving mechanism, so that the other end of the pressure rod can be driven together with the pressure plate to squeeze the end of the tire close to the steel rim. After the end of the tire close to the steel rim is squeezed, its width is reduced, and then the width of the end of the tire away from the steel rim is increased, so that the width of the end of the tire that contacts the ground can be adjusted; because the pressure rod is hinged to the steel rim, the pressure end of the pressure rod is short at a distance from the hinge point, that is, the distance, so that the pressure end has a larger force, and can have sufficient force to squeeze the tire, so that the width of the tire can be adjusted during driving.

[0028] 2. The present application hinges the pressure rod with the driving disk and sets the pressure rod as a retractable structure. When the driving disk moves to drive the pressure rod to rotate around the hinge point on the steel ring, the pressure rod can compensate for the length by retracting and retracting, thereby preventing the pressure rod from getting stuck when the driving disk moves.

[0029] 3. The present application connects a connecting disk to the driving disk, and an annular groove concentric with the center disk is provided on the connecting disk. A rotatable connecting sleeve is provided in the annular groove, and is fixedly connected to the connecting sleeve by an external driving mechanism such as a cylinder, a linear motor, etc. During the rotation of the connecting shaft together with the wheel, the connecting sleeve remains stationary, and at the same time, the connecting sleeve rotates relative to the connecting disk. When the wheel rotates, the connecting sleeve can be driven by the external driving mechanism to move away from the center disk, thereby driving the connecting disk together with the driving disk to slide on the connecting shaft, and then driving the pressure rod to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of the wheel according to the embodiment of the present application.

[0031] Figure 2 It is a cross-sectional structural diagram of the wheel of an embodiment of the present application.

[0032] Figure 3 It is a schematic diagram of the structure of the pressure rod in the embodiment of the present application.

[0033] Figure 4 This application Figure 1 Enlarged view of part A.

[0034] Figure 5 It is a cross-sectional structural diagram of the cart according to an embodiment of the present application.

[0035] Figure 6 It is a three-dimensional structural view of the cart according to an embodiment of the present application.

[0036] Description of reference numerals:

[0037] 1. Steel ring; 2. Pressure plate; 3. Connecting shaft; 4. Control switch; 5. Tire; 6. Linear motor; 7. Pressure rod; 8. Drive plate; 9. Bearing; 10. Center plate; 11. Spoke; 12. First hinge seat; 13. Second hinge seat; 14. Connecting plate; 15. Connecting sleeve; 16. Cart body; 17. Frame; 61. Output shaft; 71. First pressure rod; 72. Second pressure rod; 73. Slot; 74. Bump; 75. Compression spring; 76. End cover; 77. Opening; 81. Articulated part; 82. Connecting part; 83. Guide block; 101. Center connecting hole; 301. Slide groove; 141. Annular groove; 142. Mounting groove; 143. Blocking block. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-6 This application is described in further detail.

[0039] Embodiment 1:

[0040] Reference Figure 1 and Figure 2 The present embodiment discloses a wheel with adjustable tire width, including a steel rim 1 and a center disk 10. The end surface of the inner ring of the steel rim 1 is connected to the outer circumferential surface of the center disk 10 through spokes 11 to achieve fixed installation of the steel rim 1 and the center disk 10. A tire 5 is arranged on the end surface of the outer ring of the steel rim 1.

[0041] A plurality of first hinged seats 12 are provided on the axial end faces of the steel ring 1. The first hinged seats 12 can be connected to the steel ring 1 by welding, or can be installed on a circular connecting plate, and the circular connecting plate is connected and fixed to the steel ring 1. The hinged seats 12 provided on the end faces on each axial side of the steel ring 1 are evenly distributed along the circumference of the steel ring 1, and the hinged seats 12 on the end faces on both sides are symmetrically distributed. A pressure rod 7 is hinged on each hinged seat 12, and the end of the pressure rod 7 away from the center disk 10 is connected to a pressure plate 2 for squeezing the tire 5. In this embodiment, the pressure rod 7 and the pressure plate 2 are hingedly connected. The pressure plate 2 adopts an arc-shaped pressure plate 2, and each pressure plate 2 is connected to a corresponding pressure rod 7. A complete circular ring structure is formed between each pressure plate 2, and each pressure rod 7 is hingedly connected at the center of the arc of the pressure plate 2.

[0042] Each pressure plate 2 is distributed at the root of the tire 5, that is, on the two side end faces close to the inner ring of the tire 5, so that the pressure plate 2 is driven by the pressure rod 7 to squeeze the root of the tire 5. The end of the tire 5 close to the steel ring 1, that is, the root of the tire 5, is squeezed and its width is reduced, thereby increasing the width of the end of the tire 5 away from the steel ring 1, that is, the end of the tire 5 that contacts the ground, thereby realizing the width adjustment of the end of the tire 5 that contacts the ground.

[0043] A central connecting hole 101 penetrating through both end surfaces of the central disk 10 is provided at the center of the central disk 10, a keyway is provided in the central connecting hole 101, a connecting shaft 3 is provided in the central connecting hole 101, and the connecting shaft 3 is connected to the central connecting hole 101 through a spline, so that the connecting shaft 3 cannot rotate or move relative to the central disk 10. In this embodiment, the central disk 10 and the connecting shaft 3 can also be connected by welding to form an integrated structure between the central disk 10 and the connecting shaft 3.

[0044] Continue to refer to Figure 1 and Figure 2 , a driving disk 8 is sleeved on each of the connecting shafts 3 at the axial ends of the center disk 10, and the driving disk 8 includes a hinge portion 81 and a connecting portion 82, wherein the connecting portion 82 is a circular sleeve, and the connecting portion 82 is sleeved on the connecting shaft 3 and can slide on the connecting shaft 3. The hinge portion 81 is a hinge disk arranged concentrically with the connecting portion 82. In this embodiment, the hinge portion and the connecting portion 82 are an integrally formed structure, and a plurality of second hinge seats 13 distributed along the circumference of the hinge disk are arranged at one end of the hinge disk close to the outer circumference, and the second hinge seats 13 are fixed to the driving disk 8 by welding. The number of the second hinge seats 13 is the same as the number of the first hinge seats 12 on the corresponding side steel ring 1.

[0045] A slide groove 301 is also provided on the outer circumferential surface of the connecting shaft 3, and the slide groove 301 is distributed along the axial direction of the connecting shaft 3. A guide block 83 is also provided on the inner circumferential surface where the connecting portion 82 of the driving disc 8 contacts the connecting shaft 3. The guide block 3 is arranged in the slide groove 301, and the guide block 801 can slide on the connecting shaft 3. In this way, the driving disc 8 can only slide on the connecting shaft 3, and it cannot rotate around the connecting shaft 3, so that the installation position of the driving disc 8 is accurate and unique, so that the position of each second hinge seat 13 on the driving disc 8 is accurate and unique, which facilitates the rapid installation and positioning of the driving disc 8.

[0046] Reference Figure 2 and Figure 3, one end of each pressure rod 7 close to the center disk 10 is hinged to the corresponding second hinge seat 13. The pressure rod 7 is a retractable structure. In this embodiment, the pressure rod 7 includes a first pressure rod 71 and a second pressure rod 72. A slot 73 is provided at one end of the first pressure rod 71. One end of the second pressure rod 72 is provided in the slot 73. A protrusion 74 is also provided on the part of the second pressure rod 72 extending into the slot 73. The protrusion 74 abuts against the side wall of the slot 73. The end of the second pressure rod 72 extending into the slot 73 is also connected to the bottom wall of the slot 73 through a compression spring 75. An end cover 76 is also provided on the first pressure rod 71. An opening 77 is provided on the end cover 76. The size of the opening 77 matches the cross-sectional size of the second pressure rod 72. The end cover 76 is fixed to the end face of the first pressure rod 71 on the side where the slot 73 is provided by screws. The end cover 76 ensures that the second pressure rod 72 cannot slide out of the slot 73.

[0047] Continue to refer to Figure 1 and Figure 2 A connecting plate 14 is provided at one end of the connecting portion 82 of the driving plate 8 away from the hinge portion 81. The connecting plate 14 and the connecting portion 82 of the driving plate 8 are concentrically arranged, and the connecting plate 14 and the connecting portion 82 of the driving plate 8 are welded or bolted.

[0048] An annular groove 141 is arranged on the connecting disk 14, and the annular groove 141 is arranged concentrically with the connecting disk 14. The cross section of the annular groove 141 is a T-shaped structure. A connecting sleeve 15 is arranged in the annular groove 141. The connecting sleeve 15 can slide in the annular groove 141 and will not separate from the annular groove 141. Two connecting sleeves 15 are arranged, and the connecting sleeves are used to connect with a driving mechanism on an external frame, such as a cylinder, a linear motor, etc.

[0049] Reference Figure 4 In order to facilitate the installation of the connecting sleeve 15 into the annular groove 141, a mounting groove 142 is also provided on the connecting plate 14. The mounting groove 142 is communicated with the annular groove 141. The connecting sleeve 15 can be installed from the mounting groove 142 into the annular groove 141, and the mounting groove 142 is blocked by a blocking block 143, thereby ensuring that the connecting sleeve 15 will not separate from the annular groove 141 when the annular groove 141 rotates.

[0050] Reference Figure 5 and Figure 6 The wheel with adjustable tire width of this embodiment is applied to a cart structure for transporting materials on construction sites. The cart includes a cart body 16, on which a frame 17 for fixing the wheel is provided. The wheel is the above-mentioned wheel with adjustable tire width, and is fixed on the frame 17 to both ends of the connecting shaft 3 of the above-mentioned wheel through bearings 9.

[0051] Two linear motors 6 are arranged on both sides where the frame 17 is connected to the connecting shaft 3. The output shaft 61 of the linear motor 6 is fixedly connected to the connecting sleeve 15 by bolts. The linear motor 6 is connected to the battery on the trolley body 16 by a wire, and a control switch 4 for controlling the on and off of the linear motor 6 is arranged on the trolley body 16. The control switch 4 is used to control the on and off of two linear motors 6 on each side of the frame 17, that is, four linear motors 6. The control switch 4 is arranged at the handle of the trolley body 16.

[0052] The working process of the cart with adjustable tire width using the present embodiment is as follows:

[0053] When the cart travels on a muddy and slippery road, the control switch 4 at the handle of the cart body 16 is pressed, and the four linear motors 6 on both sides of the frame 17 are turned on at the same time. The output shaft 61 of the linear motor 6 moves the connecting disk 14 in the direction away from the center disk 10, and the connecting disk 14 drives the driving disk 8 to move in the direction away from the center disk 10. At this time, the driving disk 8 will drive one end of the pressure rod 7 connected thereto to move in the direction away from the center disk 10, and the pressure rod 7 will rotate around the first hinge seat 12. During this process, the second pressure rod 72 moves with the first pressure rod 71 to perform length compensation, so that the length of the pressure rod 7 is increased to avoid the pressure rod 7 from getting stuck when the driving disk 8 moves.

[0054] When the pressure rod 7 rotates around the first hinge seat 12, the end of the pressure rod 7 connected to the pressure plate 2 together with the pressure plate 2 squeezes the end of the tire 5 close to the steel ring 1, that is, the root of the tire 5. Since the distance between the first hinge seat 12 and the connection between the pressure rod 7 and the pressure plate 2 is short, according to the lever principle, the pressure rod 7 has a greater force on the pressure plate 2, so the pressure plate 2 has a greater squeezing force on the tire 5. After the end of the tire 5 close to the steel ring 1, that is, the root, is squeezed, its width is reduced, thereby increasing the width of the end of the tire 5 away from the steel ring 1, so that the width of the end of the tire 5 in contact with the ground can be adjusted.

[0055] The wheel with adjustable tire width of the present application can also be applied to bicycles, electric power-assisted bicycles, motorcycles, etc., and can adapt to driving on different road conditions by adjusting the tire width of the wheels of bicycles, electric power-assisted bicycles, motorcycles, etc.

[0056] The above are preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A wheel with adjustable tire width, comprising a steel rim (1) and a tire (5) arranged on the steel rim (1), wherein the steel rim (1) is connected to a center plate (10) via a support member, and characterized in that: A plurality of pressure rods (7) are hingedly connected to the axial end faces of the steel ring (1). The pressure rods (7) are distributed along the circumference of the steel ring (1). One end of the pressure rod (7) away from the center disk (10) is connected to a pressure plate (2) for squeezing the tire (5). A driving plate (8) is provided at each axial end face of the center disk (10). One end of the pressure rod (7) on each side close to the center disk (10) is connected to the driving plate (8) on the same side of the center disk (10). The driving plate (8) can move along the axial direction of the center disk (10). The movement of the driving plate (8) can drive the pressure rod (7) to drive the pressure plate (2) to squeeze the tire (5).

2. A wheel with adjustable tire width according to claim 1, characterized in that: A connecting shaft (3) for connecting to a vehicle frame (17) is arranged on the central disk (10), and a driving disk (8) is slidably arranged on the connecting shaft (3), and the driving disk (8) can slide on the connecting shaft (3).

3. A wheel with adjustable tire width according to claim 2, characterized in that: A slide groove (301) is also provided on the outer circumferential surface of the connecting shaft (3), and the slide groove (301) is distributed along the axial direction of the connecting shaft (3). A guide block (83) is also provided on the driving disk (8), and the guide block (83) is arranged in the slide groove (301).

4. A wheel with adjustable tire width according to claim 2, characterized in that: The pressure rod (7) and the driving plate (8) are hingedly connected, and the pressure rod (7) is a telescopic structure.

5. A wheel with adjustable tire width according to claim 4, characterized in that: The pressure rod (7) comprises a first pressure rod (71) and a second pressure rod (72), a slot (73) being provided on the first pressure rod (71), one end of the second pressure rod (72) being arranged in the slot (73), and the end of the second pressure rod (72) extending into the slot (73) is connected to the first pressure rod (71) via a compression spring (75).

6. The wheel with adjustable tire width according to claim 1, characterized in that: The pressing plate (2) is an arc-shaped structure, and a plurality of pressing plates (2) on the same side of the steel ring (1) form a circular structure.

7. A wheel with adjustable tire width according to claim 6, characterized in that: The pressure plates (2) distributed on both axial end surfaces of the steel ring (1) are of symmetrical structure, and the pressure rods (7) distributed on both axial end surfaces of the steel ring (1) are also of symmetrical structure.

8. The wheel with adjustable tire width according to claim 1, characterized in that: A connecting disk (14) is connected to each driving disk (8), an annular groove (141) is provided on the connecting disk (14), the annular groove (141) is arranged concentrically with the center disk (10), a connecting sleeve (15) is arranged in the annular groove (141), and the connecting sleeve (15) can slide in the annular groove (141) and cannot be separated from the annular groove (141).

9. A wheel with adjustable tire width according to claim 8, characterized in that: The connection plate (14) is also provided with a mounting groove (142) which is in communication with the annular groove (141), and the mounting groove (142) is also provided with a blocking block (143) for blocking the mounting groove (142).

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