Wheel starting resistance coefficient measuring device

Abstract

The utility model discloses a device for measuring the starting resistance coefficient of a wheel. The device comprises a bottom plate, a supporting plate, a first support, a second support, an inclined assembly, a wheel carrier and a weight, one end of the bottom plate is hinged to one end of the bearing plate, the first support is arranged at the other end of the bottom plate, the second support is arranged at the other end of the bearing plate, one end of the inclined assembly is installed in the first support, the other end of the inclined assembly is installed in the second support, the inclined assembly is used for achieving inclination of the bearing plate, and the wheel carrier is used for installing a wheel to be tested and a weight. According to the measuring device, the starting resistance coefficient of the polyurethane wheel can be rapidly measured, a traction device and a force measuring device are not needed, the measuring operation is simple and convenient, and the result is accurate.

Description

Technical Field

[0001] This utility model relates to the field of wheel starting resistance coefficient measurement technology, specifically to a wheel starting resistance coefficient measurement device. Background Technology

[0002] Polyurethane wheels used as drive wheels on equipment or vehicles are typically driven by an electric motor via a reduction gear. When starting the equipment or vehicle, the torque output by the electric motor driving the polyurethane wheel through the reduction gear must be greater than the resistance torque at which the polyurethane wheel begins to rotate. The magnitude of the resistance torque depends on the load applied to the polyurethane wheel, the wheel's size, and the material. In engineering, the starting resistance coefficient is commonly used to describe the magnitude of the starting resistance of the polyurethane wheel. The starting resistance coefficient is defined as the force that drives the polyurethane wheel to rotate divided by the load applied to the wheel. Therefore, when designing vehicles or equipment using polyurethane wheels, it is necessary to determine the relevant starting resistance coefficient.

[0003] Currently available devices for measuring the starting resistance coefficient typically involve a traction device pulling a roller to rotate, and the starting resistance coefficient is calculated based on the traction force measured by a force measuring device and the load borne by the roller. However, in this method, errors in the force measuring device can affect the calculated starting resistance coefficient.

[0004] Therefore, there is an urgent need to design a better starting resistance coefficient measuring device. Utility Model Content

[0005] In view of the above-mentioned problems in the prior art, the aim is to provide a wheel starting resistance coefficient measuring device.

[0006] The specific technical solution is as follows:

[0007] A wheel starting resistance coefficient measuring device mainly includes: a base plate, a support plate, a first support, a second support, an inclining component, a wheel frame, and weights;

[0008] One end of the base plate is hinged to one end of the support plate. The first support is disposed at the other end of the base plate, and the second support is disposed at the other end of the support plate. One end of the tilting component is installed in the first support, and the other end of the tilting component is installed in the second support. The tilting component is used to tilt the support plate. The wheel frame is used to install the wheel to be tested and the weight.

[0009] The aforementioned wheel starting resistance coefficient measuring device also has the following features: the tilting component includes a lead screw, a first rotating shaft, and a second rotating shaft; one end of the lead screw extends into the first support, and the other end of the lead screw extends into the second support; the threads at both ends of the lead screw have opposite directions; the first rotating shaft is rotatably mounted on the first support, and the second rotating shaft is rotatably mounted on the second support; the first rotating shaft is threadedly engaged with one end of the lead screw, and the second rotating shaft is threadedly engaged with the other end of the lead screw.

[0010] The aforementioned wheel starting resistance coefficient measuring device also has the following feature: the axis of the first rotating shaft intersects the axis of the first support, and the axis of the second rotating shaft intersects the axis of the second support.

[0011] The aforementioned wheel starting resistance coefficient measuring device also has the feature that a handwheel is sleeved on the lead screw.

[0012] The aforementioned wheel starting resistance coefficient measuring device also has the following feature: a first bracket is provided at one end of the base plate, and a second bracket is provided at one end of the support plate; the first bracket and the second bracket are hinged together by a hinge shaft.

[0013] The aforementioned wheel starting resistance coefficient measuring device also has the feature that a baffle is provided at each end of the support plate.

[0014] The wheel starting resistance coefficient measuring device described above also has the following feature: the wheel frame is a U-shaped part, one side of the wheel frame has a receiving groove for accommodating the wheel to be tested, and the other side of the wheel frame can hold the weight;

[0015] Rolling elements are provided around one side of the wheel frame, and the rolling elements can roll in cooperation with the two opposite sides of the support plate.

[0016] The aforementioned wheel starting resistance coefficient measuring device also has the following feature: the rolling element is a bearing, pulley, or roller.

[0017] The aforementioned wheel starting resistance coefficient measuring device also has the following feature: fastening holes are provided on two opposite sides of the wheel frame, and fasteners are inserted through the fastening holes and the wheel to be tested to mount the wheel to be tested onto the wheel frame.

[0018] The aforementioned wheel starting resistance coefficient measuring device also has the following feature: a protruding post is provided on the other side of the wheel frame, and the protruding post is used to mount the weight.

[0019] The positive effects of the above technical solution are:

[0020] This utility model provides a wheel starting resistance coefficient measuring device. A wheel frame with weights and polyurethane wheels is placed on a support plate. By operating the tilting component, the support plate is tilted. When the wheel frame begins to slide, the starting resistance coefficient of each polyurethane wheel is measured and calculated. The starting resistance coefficient of polyurethane wheels can be measured quickly without the need for a traction device or a force measuring device. The measurement operation is simple, convenient, and the results are accurate. Attached Figure Description

[0021] Figure 1 A schematic diagram of the overall structure of a wheel starting resistance coefficient measuring device provided by this utility model in the first state;

[0022] Figure 2 A cross-sectional structural diagram of a wheel starting resistance coefficient measuring device provided by this utility model along a first direction;

[0023] Figure 3 A schematic cross-sectional view of the wheel starting resistance coefficient measuring device provided by this utility model in the second state;

[0024] Figure 4 A schematic cross-sectional view of a wheel starting resistance coefficient measuring device provided by this utility model along the second direction;

[0025] Figure 5 This is a schematic diagram for measurement and calculation.

[0026] In the attached diagram: 1. Base plate; 2. Support plate; 3. First support; 4. Second support; 5. Wheel frame; 52. Protruding column; 6. Weight; 7. Lead screw; 8. First rotating shaft; 9. Second rotating shaft; 10. Handwheel; 11. First bracket; 12. Second bracket; 13. Hinge shaft; 14. Baffle; 15. Bearing; 16. Bolt; 17. First bushing; 18. Second bushing; 19. Third bushing; 20. Washer; 21. Lead screw nut. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0028] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] Please see Figures 1 to 5 This utility model discloses a wheel starting resistance coefficient measuring device for measuring the starting resistance coefficient of a wheel, such as a polyurethane wheel 100. The wheel to be tested includes, but is not limited to, polyurethane wheel 100, and can also be other types of wheels. The wheel starting resistance coefficient measuring device includes: a base plate 1, a support plate 2, a first support 3, a second support 4, an inclined assembly, a wheel frame 5, and weights 6.

[0031] One end of the base plate 1 is hinged to one end of the support plate 2. The first support 3 is set at the other end of the base plate 1, and the second support 4 is set at the other end of the support plate 2. One end of the tilting component is installed in the first support 3, and the other end of the tilting component is installed in the second support 4. The tilting component is used to tilt the support plate 2. The wheel frame 5 is used to install the wheel to be tested and the weight 6.

[0032] Optionally, the first support 3 is connected to the upper surface of the base plate 1 by screws, bolts 16, or similar structures, and the second support 4 is connected to the lower surface of the support plate 2 by screws, bolts 16, or similar structures. The first support 3 and the base plate 1 are fixed and will not move relative to each other, as are the second support 4 and the support plate 2. However, the assembly of the first support 3 and the base plate 1 and the assembly of the second support 4 and the support plate 2 are movable. Optionally, in this embodiment, the first support 3 and the second support 4 are sleeve structures.

[0033] Optionally, in this embodiment, the tilting assembly includes a lead screw 7, a first rotating shaft 8, and a second rotating shaft 9. One end of the lead screw 7 extends into the first support 3, and the other end of the lead screw 7 extends into the second support 4. The threads at both ends of the lead screw 7 have opposite directions of rotation. The first rotating shaft 8 is rotatably mounted on the first support 3, and the second rotating shaft 9 is rotatably mounted on the second support 4. The first rotating shaft 8 is threadedly engaged with one end of the lead screw 7, and the second rotating shaft 9 is threadedly engaged with the other end of the lead screw 7.

[0034] Optionally, since the lead screw and nut assembly can be purchased directly from the market, the lead screw 7 is equipped with a lead screw nut 21. The lead screw nut 21 is connected to the first rotating shaft 8, and the first rotating shaft 8 is threadedly connected to the lead screw 7 through the lead screw nut 21. The lead screw nut 21 is also connected to the second rotating shaft 9, and the second rotating shaft 9 is threadedly connected to the lead screw 7 through the lead screw nut 21. In this embodiment, two lead screw nuts 21 are required. Optionally, the first rotating shaft 8 and the second rotating shaft 9 can be designed with internal threads, and the first rotating shaft 8 and the second rotating shaft 9 are directly sleeved on both ends of the lead screw 7. The lead screw 7 can move relative to the first support 3 and the second support 4 to satisfy the tilting of the support plate 2. Optionally, a washer 20 for limiting is provided at the end of the lead screw 7 to prevent the lead screw 7 from dislodging from the first support 3 or the second support 4. The washer 20 is installed at the end of the lead screw 7 using screws, bolts 16, or other structures.

[0035] The axis of the first rotating shaft 8 intersects the axis of the first support 3, and the axis of the second rotating shaft 9 intersects the axis of the second support 4. Optionally, in this embodiment, the axis of the first rotating shaft 8 is perpendicular to the axis of the first support 3, and the axis of the second rotating shaft 9 is perpendicular to the axis of the second support 4. The base plate 1 is always placed horizontally, and the axis of the first support 3 is vertical. Therefore, the axis of the first rotating shaft 8 is horizontal, while the support plate 2 will tilt under the action of the tilting component. The position of the second support 4 relative to the support plate 2 is fixed. At this time, the axis of the second support 4 will change from vertical to tilted to adapt to the tilt of the support plate 2, while the axis of the second rotating shaft 9 remains horizontal.

[0036] A handwheel 10 is fitted onto the lead screw 7. Rotating the handwheel 10 causes the lead screw 7 to rotate, which can drive the first rotating shaft 8 on the lead screw 7 to rise or fall, thereby driving the support plate 2 to rise or fall, and thus achieving the tilting of the support plate 2.

[0037] A first support 11 is provided at one end of the base plate 1, and a second support 12 is provided at one end of the support plate 2. The first support 11 and the second support 12 are hinged together by a hinge shaft 13. Optionally, both the first support 11 and the second support 12 are "[" shaped structures, with the open ends of the two "[" shaped structures facing each other and hinged together by the hinge shaft 13. The flat end of the "[" shaped structure is connected to the base plate 1 or the support plate 2. The hinged arrangement is to allow for slight rotation when the support plate 2 is tilted. The first support 11 is connected to the base plate 1 by screws, bolts 16, or similar structures. The first support 11 and the base plate 1 are fixed together, and there is no relative movement between them. The second support 12 is connected to the support plate 2 by screws, bolts 16, or similar structures. The second support 12 and the support plate 2 are fixed together, and there is no relative movement between them. However, the entire assembly of the first support 11 and the base plate 1 and the entire assembly of the second support 12 and the support plate 2 are movable.

[0038] Optionally, a baffle 14 is provided at each end of the support plate 2. The baffle 14 is disposed on the upper surface of the support plate 2, and the wheel to be tested is placed on the upper surface of the support plate 2. The baffle 14 is used to prevent the wheel to be tested from falling off the support plate 2. The upper surface of the baffle 14 is covered with a friction substrate, which can be connected by fasteners or glued.

[0039] Optionally, in this embodiment, the wheel frame 5 is a U-shaped part, one side of the wheel frame 5 has a receiving groove for accommodating the wheel to be tested, and the other side of the wheel frame 5 can hold a weight 6;

[0040] Rolling elements are provided around one side of the wheel frame 5, and the rolling elements can roll in cooperation with the two opposite sides of the support plate 2.

[0041] Optionally, the rolling element is a bearing 15, a pulley, or a roller. For example, in this embodiment, the rolling element is a bearing 15.

[0042] To secure the wheel under test, such as a polyurethane wheel, fastening holes are provided on two opposite sides of the wheel frame 5. Fasteners pass through these holes and the wheel under test to mount the wheel onto the wheel frame 5. Optionally, the fasteners can be screws, bolts 16, or pins. Screws and bolts 16 require the use of nuts, which will not be elaborated here.

[0043] In one specific embodiment, the wheel frame 5 has two fastening holes on each of its two sides. Each fastening hole houses a fastener, such as a bolt 16, and each fastener is fitted with two polyurethane wheels 100, for a total of four polyurethane wheels 100. Preferably, to secure the polyurethane wheels 100, each fastener is fitted with several bushings. For example, each polyurethane wheel 100 has one bushing on each side, for a total of three bushings on the two polyurethane wheels 100. Examples include a first bushing 17, a second bushing 18, and a third bushing 19. The bushing design is merely illustrative and not intended to limit the scope of this invention.

[0044] A protruding post 52 is provided on the other side of the wheel frame 5, which is used to mount the weight 6.

[0045] The wheel starting resistance coefficient measuring device provided by this utility model measures:

[0046] The base plate 1 is placed on a horizontal surface. The tilting component is operated to make the support plate 2 horizontal. The wheel frame 5, which is equipped with the wheel to be tested, is placed on the friction substrate. The wheel to be tested is in direct contact with the friction substrate. The tilting component is operated to tilt the support plate 2, so that the angle between the support plate 2 and the base plate 1 gradually increases. The tilt of the support plate 2 is adjusted when the wheel frame 5 begins to move. Figure 2 When moving to the left (critical point), the component force F generated by the total weight G of the wheel frame 5, the structure inside the wheel frame 5 (e.g., polyurethane wheel 100, bushing, bolt 16, nut) and the weight 6, moving downward in the inclined direction, is equal to the sum of the starting resistance of all the polyurethane wheels 100. At this point, the starting resistance coefficient can be calculated.

[0047] In the embodiment with lead screw 7, the handwheel 10 is first rotated counterclockwise in the first direction until it can no longer rotate. At this time, the limiting washers at both ends of the lead screw 7 are in contact with the support plate 2 and the base plate 1, respectively. The support plate 2 is in a horizontal state. The wheel frame 5, which is equipped with four polyurethane wheels 100 of identical material, structure, and size, is placed on the support plate 2 (placed on the right side). The bearings 15 on both sides of the wheel frame 5 are placed on both sides of the support plate 2, respectively, to constrain the degree of freedom of the wheel frame 5 to move towards both sides of the support plate 2. The handwheel 10 is then rotated clockwise in the second direction, for example. The two lead screw nuts 21 (the first rotating shaft 8 and the second rotating shaft 9) move away from the handwheel 10, pushing the support plate 2 to rotate along the axis of the hinge shaft 13, so that the support plate 2 has a certain angle with the horizontal plane. When the wheel frame 5 begins to move ( Figure 2When the wheel moves to the left (critical point), the downward component force F generated by the total weight G of the wheel frame 5, the structure within the wheel frame 5 (e.g., polyurethane wheel 100, bushing, bolt 16, nut), and the weight 6 is equal to the sum of the starting resistances of all the polyurethane wheels 100. At this point, the starting resistance coefficient can be calculated. The component force F divided by the normal force N is the starting resistance coefficient of each polyurethane wheel 100. The calculation method for the starting resistance coefficient is as follows: Figure 4 As shown, select two points, such as A1 and A2, on the base plate 1. Find two points, B1 and B2, on the support plate 2 that are directly opposite A1 and A2 respectively. The four points form a right trapezoid. By measuring line segments A1A2, B1B2, A1B1, and A2B2, the angle θ between the support plate 2 and the horizontal plane can be calculated. When the wheel frame 5 first begins to slip, F = G*sinθ, N = G*cosθ. Therefore, F divided by N equals tanθ, which means the starting resistance coefficient is equal to tanθ. Tanθ can be calculated earlier, which is the starting resistance coefficient.

[0048] It should be noted that all polyurethane wheels 100 must be the same size and material.

[0049] This utility model provides a wheel starting resistance coefficient measuring device. A wheel frame 5 with weights 6 and polyurethane wheels 100 is placed on a support plate 2. By operating the tilting component, the support plate 2 is tilted. When the wheel frame 5 begins to slide, the starting resistance coefficient of each polyurethane wheel 100 is measured and calculated. The starting resistance coefficient of the polyurethane wheel 100 can be measured quickly without the need for a traction device or a force measuring device. The measurement operation is simple, convenient, and the results are accurate.

[0050] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A device for measuring the starting resistance coefficient of a wheel, characterized in that, include: Base plate, support plate, first support, second support, tilting assembly, wheel frame, and weights; One end of the base plate is hinged to one end of the support plate. The first support is disposed at the other end of the base plate, and the second support is disposed at the other end of the support plate. One end of the tilting component is installed in the first support, and the other end of the tilting component is installed in the second support. The tilting component is used to tilt the support plate. The wheel frame is used to install the wheel to be tested and the weight.

2. The wheel starting resistance coefficient measuring device according to claim 1, characterized in that, The tilting assembly includes a lead screw, a first rotating shaft, and a second rotating shaft. One end of the lead screw extends into the first support, and the other end of the lead screw extends into the second support. The threads at both ends of the lead screw have opposite directions. The first rotating shaft is rotatably mounted on the first support, and the second rotating shaft is rotatably mounted on the second support. The first rotating shaft is threadedly engaged with one end of the lead screw, and the second rotating shaft is threadedly engaged with the other end of the lead screw.

3. The wheel starting resistance coefficient measuring device according to claim 2, characterized in that, The axis of the first rotating shaft intersects the axis of the first support, and the axis of the second rotating shaft intersects the axis of the second support.

4. The wheel starting resistance coefficient measuring device according to claim 2, characterized in that, A handwheel is fitted onto the lead screw.

5. The wheel starting resistance coefficient measuring device according to any one of claims 1 to 4, characterized in that, A first bracket is provided at one end of the base plate, and a second bracket is provided at one end of the support plate. The first bracket and the second bracket are hinged together by a hinge shaft.

6. The wheel starting resistance coefficient measuring device according to any one of claims 1 to 4, characterized in that, A baffle is provided at each end of the support plate.

7. The wheel starting resistance coefficient measuring device according to any one of claims 1 to 4, characterized in that, The wheel frame is a U-shaped component, with a receiving groove on one side to accommodate the wheel to be tested, and the weight can be placed on the other side of the wheel frame; Rolling elements are provided around one side of the wheel frame, and the rolling elements can roll in cooperation with the two opposite sides of the support plate.

8. The wheel starting resistance coefficient measuring device according to claim 7, characterized in that, The rolling element is a bearing, pulley, or roller.

9. The wheel starting resistance coefficient measuring device according to claim 7, characterized in that, The wheel frame has fastening holes on its two opposite sides. Fasteners are inserted through the fastening holes and the wheel to be tested to mount the wheel to be tested onto the wheel frame.

10. The wheel starting resistance coefficient measuring device according to claim 7, characterized in that, A protruding post is provided on the other side of the wheel frame, and the protruding post is used to hold the weight.

Images