Spoke, rim structure and guide wheel with same

Abstract

The utility model belongs to the technical field of agricultural mechanical parts, and particularly relates to a spoke, a rim structure and a guide wheel with the structure. The inner matching surface and the outer matching surface of the component formed by assembling the spoke and the rim are arranged concentrically, and meanwhile, the rotational inertia of the component is increased by adopting the scheme that the spoke outer end matching surface and the spoke inner end matching surface are eccentrically arranged or the spoke outer end matching surface is non-circular, so that the interaction force between the spoke and the rim in a rotating state can be reduced, and the service life of the component is prolonged. The stability of the rotating state of the component is maintained, meanwhile, the reliability of matched connection of the spoke and the rim is guaranteed, and therefore the service life of the guide wheel with the spoke and rim structure is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to agricultural machinery parts technical field, especially relate to a spoke, wheel rim structure and the guide wheel with the structure. BACKGROUND

[0002] The prior application CN217918174U of the applicant provides a spoke, wheel rim structure and guide wheel with the structure for facilitating production and processing of the spoke, wheel rim structure and guide wheel with the structure, which comprises a hub, a spoke plate and a wheel rim, a plurality of petal bodies are combined to form a spoke plate in the form of a ring plate, the outer plate edge of the spoke plate is connected with the wheel rim in a plug-in connection mode, and the hub is arranged in the middle connecting hole of the spoke plate and is fixedly connected with the hole of the middle connecting hole. Since the hub, the spoke plate and the wheel rim are produced and processed separately, the components can be made of different materials, thereby achieving the effect of reducing the weight of the agricultural machinery while ensuring the wear resistance of the wheel body. In actual application, due to the large difference in material quality of the wheel rim and the spoke plate, even if the wheel rim and the spoke plate are connected by welding, the wheel rim and the spoke plate are prone to welding failure after long-term use, thereby causing relative rotation of the wheel rim and the spoke plate, leading to wear of the spoke plate body, and the reliability and service life of the spoke, wheel rim structure and guide wheel with the structure cannot meet the requirements. SUMMARY

[0003] The utility model aims at providing a spoke, wheel rim structure and guide wheel with the structure, which can avoid relative rotation of the wheel rim and the spoke.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0005] A spoke, wheel rim structure, comprising a spoke in the form of a ring plate, a wheel rim connected with the outer periphery of the spoke in the form of a ring, the spoke having an inner end mating surface for cooperating with a hub or an axle and a spoke outer end mating surface for cooperating with the wheel rim, the wheel rim having a wheel rim outer periphery mating surface for cooperating with a transmission belt or a transmission chain, the spoke inner end mating surface and the wheel rim outer periphery mating surface being arranged in the same core, and the spoke outer end mating surface being arranged eccentrically with respect to the spoke inner end mating surface or the spoke outer end mating surface being non-circular.

[0006] A guide wheel with the above-mentioned spoke, wheel rim structure, the spoke having a hub in the form of a pipe arranged and connected in the middle part, the inner end of the spoke being fixedly connected with the hub, and the wheel rim outer periphery mating surface being arranged in the same core with the pipe core of the hub; the spoke has a central through hole for the hub or the axle to pass through, and the spoke has a weight reduction hole.

[0007] Compared with the prior art, the present application has the following technical effects: the inner and outer fitting surfaces of the component formed by the combination of the spoke and the rim are arranged with the core, and the following two schemes are adopted to increase the moment of inertia of the component, one is to arrange the outer end fitting surface of the spoke and the inner end fitting surface of the spoke eccentrically to arrange the mass center of the component eccentrically with the geometric center of the component, and the other is to make the outer end fitting surface of the spoke non-circular to make the mass distribution of the component uneven, so that the interaction force between the spoke and the rim in the rotating state can be reduced, thereby ensuring the reliability of the connection between the spoke and the rim while improving the stability of the rotating state of the component, and further prolonging the service life of the guide wheel using the spoke and rim structure. In addition, when the outer end fitting surface of the spoke and the inner end fitting surface of the spoke are arranged eccentrically or the outer end fitting surface of the spoke is non-circular, the relative rotation of the spoke and the rim in the circumferential direction can be effectively limited, thereby ensuring the stability of the connection between the two. BRIEF DESCRIPTION OF DRAWINGS

[0008] The content expressed by each drawing of the present specification and the marks in the drawings are briefly described as follows:

[0009] Figure 1 is the front view of example one;

[0010] Figure 2 is Figure 1 A-A sectional view in

[0011] Figure 3 is the perspective view of the rim in example one;

[0012] Figure 4 is the front view of the spoke in example one;

[0013] Figure 5 is the sectional view of the spoke and the rim in the cooperating state in example one, perpendicular to the mid-plane in the direction of the core shaft of the rim;

[0014] Figure 6 is the front view of a kind of embodiment of spoke;

[0015] Figure 7 is the front view of the spoke in example two;

[0016] Figure 8 is the sectional view of the spoke and the rim in the cooperating state in example two, perpendicular to the mid-plane in the direction of the core shaft of the rim;

[0017] Figure 9 is the perspective view of example three;

[0018] Figure 10 is the half sectional perspective view of the rim and a piece of petal unit, one spoke unit in the cooperating state in example three;

[0019] Figure 11This is a front view of the wheel spokes in Embodiment 3;

[0020] Figure 12 This is a cross-sectional view of the center plane perpendicular to the direction of the rim spindle in the fit between the spokes and the rim in Embodiment 3.

[0021] Figure 13 This is a three-dimensional schematic diagram of Example 4;

[0022] Figure 14 This is a three-dimensional schematic diagram of the engagement state of a rim unit segment, a petal unit, and a spoke unit in Embodiment 4.

[0023] Figure 15 This is a three-dimensional schematic diagram of the rim unit segment in Embodiment 4;

[0024] Figure 16 This is a three-dimensional schematic diagram of the spoke unit in Embodiment 4;

[0025] Figure 17 This is a front view of the spokes in Embodiment 4. Detailed Implementation

[0026] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and through the description of the examples.

[0027] Example 1

[0028] As attached Figure 1 , 2 The guide wheel shown includes spokes 20 that are integrally annular plates. A tubular hub 30 is inserted through the center of the spokes 20, and the inner end of the spokes 20 is fixedly connected to the hub 30. A rim 10, integrally annular in shape, is connected to the outer periphery of the spokes 20. The rim 10 has an outer peripheral mating surface c for engaging with a drive belt or drive chain. To ensure reliable guidance of the drive belt or drive chain wound around the guide wheel, the outer peripheral mating surface c should be coaxially arranged with the core of the hub 30. This embodiment is illustrated in the appendix. Figure 3 As shown, the outer circumferential surface of the rim 10 is generally a smooth cylindrical surface, so the outer circumferential surface of the rim 10 is coaxially arranged with the core of the hub 30. Furthermore, in order to reduce the weight of the guide wheel and achieve mechanical lightweighting, the spokes 20 are provided with weight reduction holes 24, and three or more weight reduction holes 24 are evenly distributed at equal angles around the spokes 20.

[0029] The details of the 20 spokes are as follows (see attached image). Figure 4 As shown, the central part is a central through hole 21 through which the hub 30 or axle passes, and the outer periphery is elliptical. To achieve a proper connection between the rim 10 and the spokes 20 while preventing relative rotation between them, the assembly state of the rim 10 and spokes 20 in this embodiment is as shown in the attached figure. Figure 5As shown, the rim 10 tightly covers the outer periphery of the spokes 20, that is, the rim 10 tightly wraps around the elliptical cylindrical outer periphery of the spokes 20 and the two side plates adjacent to the elliptical cylindrical outer periphery. See attached diagram for details. Figure 3 As shown, the inner sidewall of the rim 10 is provided with an annular groove 11 for accommodating the outer peripheral plate edge of the spoke 20. In a preferred embodiment, the groove cavity of the annular groove 11 matches the outer peripheral plate surface of the spoke 20.

[0030] As attached Figure 5 As shown, the spoke 20 has an inner mating surface a for engaging with the hub 30 or axle, and an outer mating surface b for engaging with the rim 10. To ensure a reliable fit between the spoke 20 and the tubular hub 30 or cylindrical axle, the inner mating surface a and the outer circumferential mating surface c of the rim are arranged concentrically. In this embodiment, the outer circumferential surface of the hub 30 is cylindrical, therefore the inner mating surface a is a cylindrical surface that matches it. In other embodiments, the inner mating surface a can also be any other shape or contour that matches the outer circumferential contour of the hub 30 or axle, as long as it allows for concentric arrangement and synchronous rotation of both. Furthermore, in this embodiment, the outer end mating surface b of the spokes is located within the same elliptical cylindrical surface, meaning the outer end mating surface b of the spokes is not circular. Also, since the inner side of the rim 10 avoids tightly wrapping around the outer periphery of the spokes 20, the mating surface between the spokes 20 and the rim 10 is also not circular. This, on the one hand, restricts the circumferential relative rotation between the spokes 20 and the rim 10, ensuring a reliable connection between them. On the other hand, it causes uneven mass distribution of the spokes 20, thereby increasing the moment of inertia of the spokes 20. Thus, when the guide wheel using this spoke 20 and rim 10 structure rotates around the spindle of the hub 30, its rotational stability is high, and the interaction force between the spokes 20 and the rim 10 is small. This further improves the reliability of the connection between the spokes 20 and the rim 10 after long-term use, thereby extending the service life of the guide wheel.

[0031] In this embodiment, the inner end mating surface a of the spoke, the outer end mating surface b of the spoke, and the outer circumferential mating surface c of the rim are continuous and closed cylindrical surfaces. In other embodiments, these mating surfaces can also be continuous and closed elliptical cylindrical surfaces, irregular cylindrical surfaces, conical surfaces, etc., or they can be composed of several unit mating surfaces intermittently arranged within the same cylindrical or conical surface, such as the pin end face, intermittently fitted hinge mating surfaces, etc. Similarly, they can also be the envelope surface of unit mating surfaces with different inner diameters arranged continuously or intermittently, such as the attached... Figure 6 When the outer periphery of the central spoke 20 is toothed, for ease of understanding and analysis, the envelope of its tooth peaks can be regarded as the mating surface b at the outer end of the spoke.

[0032] Example 2

[0033] The difference between this embodiment and Embodiment 1 is that the outer periphery of the spoke 20 is circular, and the outer end mating surface b and the inner end mating surface a of the spoke are eccentrically arranged. See attached figure for details.Figure 7 , 8 As shown, the reference mating surface d, drawn with dashed lines, is cocentrically arranged with the inner mating surface a of the spoke. The inner diameter of the outer mating surface b of the spoke is larger than the inner diameter of the inner mating surface a of the spoke but smaller than the inner diameter of the reference mating surface d. A crescent-shaped notch 23 is formed between the outer mating surface b of the spoke and the reference mating surface d. In this way, the center of mass of the spoke 20 is eccentrically arranged with respect to the center of rotation of the spoke 20 in its installed state. When the spoke 20 covers the rim 10 to form a component, the center of mass of the component and its geometric axis are also eccentrically arranged. Similar to Embodiment 1, this can also limit the circumferential relative rotation between the spoke 20 and the rim 10, ensure a reliable connection between the two, increase the moment of inertia of the component, and thus improve the reliability of the connection between the spoke 20 and the rim 10 after long-term use, extending the service life of the guide wheel.

[0034] Furthermore, in this embodiment, the eccentricity between the outer end mating surface b and the inner end mating surface a of the spoke 20 should not be too large to prevent the moment of inertia of the component formed by the assembly of the spoke 20 and the rim 10 from being too large, which would result in an excessively large force required for the guide wheel made using this component to start. Additionally, the eccentricity between the outer end mating surface b and the inner end mating surface a should be less than the maximum groove depth of the annular groove 11, so that the outer periphery of the spoke 20 can be covered by the rim 10, thereby ensuring an effective connection between the two. When the eccentricity between the outer end mating surface b and the inner end mating surface a is too large, the groove depth of the annular groove 11 on the inner side of the rim 10 needs to be increased accordingly, which would increase the volume and mass of the rim 10, leading to an increase in product cost.

[0035] In this embodiment and in Embodiment 1, the spokes 20 are integrally formed, resulting in good integrity. They can be formed using sheet metal stamping, which is simple and inexpensive. Furthermore, to ensure effective connection between the rim 10 and the spokes 20 while facilitating processing, in this embodiment, the rim 10 can be formed by forging a tubular blank onto the outer circumference of the spokes 20 in a single operation. This eliminates the need to machine the annular groove 11 on the inner surface of the rim 10 to accommodate the outer edge of the spokes 20, and also avoids welding processes prone to detachment. This simplifies processing steps while ensuring a reliable connection between the two.

[0036] Example 3

[0037] The difference between this embodiment and Embodiment 2 is that the spokes 20 are formed by combining several spoke units. See attached diagram for details. Figures 8-12As shown, the spoke unit comprises a petal unit 20a in the form of a plate and a spoke unit 20b in the form of a strip. The outer end of the spoke unit 20b is provided with a protrusion 22, which is connected to the rim 10 and limits the relative rotational displacement of the two in the circumferential direction of the rim 10. In other embodiments, a recess 23 can be provided at the inner end of the spoke unit 20b, and a protrusion is provided at the inner side of the rim 10 to limit the relative rotational displacement of the two in the circumferential direction of the rim 10; or a protrusion 22 or a recess 23 can be provided on the petal unit 20a, or both a protrusion 22 and a recess 23 are provided on the petal unit 20a and the spoke unit 20b, respectively, to limit the relative rotational displacement of the components of the spoke 20 and the rim 10 in the circumferential direction.

[0038] The present embodiment is illustrated in the accompanying drawings Figure 11 As shown, the inner end surface of the spoke unit 20b is a spoke inner end mating surface a, and the inner end surfaces of the spoke units 20b are located on the same cylindrical surface to reliably position the rim 10 and the hub 20. The spoke units 20b are arranged at equal angles in the circumferential direction of the spoke 20, and there are three of them. In other embodiments, at least two spoke units 20b are required to reliably position the rim 10 and the hub 30.

[0039] Specifically, in the present embodiment, the spoke unit 20b is arranged in the radial direction of the spoke 20, and the petal unit 20a is arranged between adjacent spoke units 20b. The two ends of the petal unit 20a are respectively fitted or blocked with two adjacent spoke units 20b, and the petal unit 20a can reliably maintain the posture of the adjacent two spoke units 20b, thereby ensuring the accurate installation and positioning of the rim 10 and the hub 30. In the present embodiment, the inner end surface of the petal unit 20a is arranged in a different plane from the spoke inner end mating surface a.

[0040] In the present embodiment, the outer peripheral surface of the petal unit 20a constitutes a spoke outer end mating surface b. As shown in the accompanying drawings Figure 11 As shown, the dashed reference mating surface d and the spoke reference mating surface e are arranged on the same axis as the spoke inner end mating surface a, the inner diameter of the spoke outer end mating surface b is greater than that of the spoke inner end mating surface a and less than that of the reference mating surface d, and the recess 23 is formed between the spoke outer end mating surface b and the reference mating surface d.

[0041] As shown in the accompanying drawings Figure 12As shown, in this embodiment, the shapes and contours of each spoke unit 20b are completely identical, which facilitates the assembly of the spoke 20 assembly while ensuring the accurate installation and positioning of the rim 10 and the hub 30. The outer periphery of the petal unit 20a is eccentrically arranged with the inner end mating surface a of the spoke, which makes the center of mass of the spoke 20 assembly eccentrically arranged with the center of rotation of the spoke 20 in the installed state. Furthermore, when the spoke 20 covers the rim 10 to form a component, the center of mass of the component and its geometric axis are also eccentrically arranged, thereby increasing the moment of inertia of the component. This improves the reliability of the connection between the spoke 20 and the rim 10 after long-term use and extends the service life of the guide wheel.

[0042] The rim 10 in this embodiment is shown in the attached figure. Figure 10 As shown, its inner sidewall has an annular groove 11 for accommodating the outer peripheral plate edge of the spoke 20. The annular groove 11 covers the outer peripheral plate edge of the spoke 20 and the protrusion 22 or recess 23 provided at the outer peripheral plate edge to limit the relative displacement of the leaf unit 20a, the spoke unit 20b and the rim 10 in the circumferential direction of the rim 10. The annular groove 11 also includes a positioning groove 111 that mates with the protrusion 22 on the spoke unit 20b. In this embodiment, the protrusion direction of the protrusion 22 provided on the spoke unit 20b is arranged radially along the spoke 20. In other embodiments, the protrusion 22 can also be arranged axially along the spoke 20, that is, a protrusion 22 perpendicular to its plate surface is provided on the side plate surface of the spoke unit 20b. In this way, the rim 10 covering the protrusion 22 can also limit the circumferential rotational displacement of both. Similarly, when a notch 23 is provided on the spoke unit 20b, the notch 23 can be arranged in the radial or axial direction along the spoke 20.

[0043] In this embodiment, the positioning of the rim 10 and hub 30 is achieved by the spoke unit 20b. Therefore, to ensure the reliability of its positioning, the strength of the spoke unit 20b can be enhanced, as detailed in the attached figure. Figure 8 As shown, the dimension of the spoke unit 20b in the axial direction of the spoke 20 is greater than the dimension of the petal unit 20a in the axial direction of the spoke 20, that is, the thickness of the spoke unit 20b is greater than the plate thickness of the petal unit 20a.

[0044] Furthermore, in this embodiment, when the component formed by assembling the spokes 20 and the rim 10 is used as a guide wheel, the inner end of the spoke unit 20b is welded to the hub 30 that is installed inside it, reliably limiting the relative displacement between the hub 30 and the spoke unit 20b. After limiting the displacement of the spoke unit 20b in the radial direction of the rim 10, the separation of the spoke unit 20 and the rim 10 can be effectively avoided. In this way, the spoke unit 20 can be stably and reliably installed on the rim 10 without welding the spoke unit 20b.

[0045] In other embodiments, the valve unit 20a can be omitted, and the rim 10 and hub 30 can be connected only through the spoke unit 20b; the inner end plate surface of the valve unit 20a can also be made coplanar with the inner end surface of the spoke unit 20b, that is, the inner end surfaces of the valve unit 20a and the spoke unit 20b together form the inner end mating surface a of the spoke; the spoke unit 20b can also be omitted, and the spoke 20 can be formed only by the valve unit 20a, which is in the shape of an inner and outer eccentric plate.

[0046] Example 4

[0047] The difference between this embodiment and Embodiment 3 is that the rim 10 is formed by combining two or more rim unit segments 10a. This embodiment is illustrated in the attached figure. Figures 13-17 As shown, the same spoke unit 20b is inserted and connected to the ends of two adjacent rim unit segments 10a. The insertion and connection direction of the spoke unit 20b and the rim unit segment 10a is arranged radially along the rim 10. When the spoke unit 20b connects each rim unit segment 10a to form a complete ring-shaped rim 10, each rim unit segment 10a is inserted and connected to different spoke units 20b at both ends. The spoke units 20b placed at both ends of the same rim unit segment 10a are arranged at an angle to the separation direction of the rim unit segment 10a, so that the spoke unit 20b and the rim 10 form a self-locking structure. Thus, by limiting the displacement of the spoke unit 20b in its length direction, that is, limiting the displacement of the spoke unit 20b in the radial direction of the rim 10, the installation posture of the rim 10 can be effectively maintained. Therefore, by simply welding the hub 30 and the spoke unit 20b together, the reliability of the entire guide wheel structure can be guaranteed, greatly reducing the amount of welding work required for the guide wheel body. Clearly, in this embodiment, the connection structure between the spoke unit 20b and the rim unit segment 10a effectively restricts their relative rotational displacement. Reliable assembly of the guide wheel can be achieved without welding the spoke unit 20b and the rim 10, reducing the amount of welding work and fundamentally avoiding the risk of detachment after long-term use.

[0048] In other embodiments, the same petal unit 20a may be connected to two adjacent rim unit segments 10a by plugging in.

Claims

1. A wheel spoke, rim structure, characterized by: The spoke (20) is a whole ring plate, the outer periphery of the spoke (20) is connected with a whole ring rim (10), the spoke (20) has a inner end matching surface (a) for matching with a hub or an axle and a outer end matching surface (b) for matching with the rim (10), the rim (10) has a outer periphery matching surface (c) for matching with a transmission belt or a transmission chain, the inner end matching surface (a) is coaxial with the outer periphery matching surface (c), and the outer end matching surface (b) is eccentric with the inner end matching surface (a) or the outer end matching surface (b) is non-circular.

2. The spoke, rim structure of claim 1, wherein: The inner side wall of the rim (10) has an annular groove (11) for accommodating the outer periphery plate edge of the spoke (20); when the outer end matching surface (b) is eccentric with the inner end matching surface (a), the eccentric distance between the outer end matching surface (b) and the inner end matching surface (a) of the spoke (20) is less than the maximum groove depth of the annular groove (11).

3. The spoke, rim structure of claim 1, wherein: The inner end matching surface (a) and the outer end matching surface (b) of the spoke (20) are coaxial, the inner end matching surface (a) is located in the same cylindrical surface, and the outer end matching surface (b) is located in the same elliptical cylindrical surface.

4. The spoke, rim structure of claim 1, wherein: The spoke (20) is an integral part.

5. The spoke, rim structure of claim 1, wherein: The spoke (20) is formed by combining a plurality of spoke units, the spoke units include a whole plate-shaped petal unit (20a) and / or a whole strip-shaped spoke unit (20b).

6. The spoke, rim structure of claim 5, wherein: The spoke unit (20b) is provided with a protrusion (22) and / or a recess (23), and the spoke unit (20b) is arranged along the radial direction of the spoke (20); the inner side wall of the rim (10) has an annular groove (11) for accommodating the outer periphery plate edge of the spoke (20), and the annular groove (11) covers the outer periphery plate edge of the spoke (20) and the protrusion (22) and / or the recess (23) arranged at the outer periphery plate edge.

7. The spoke, rim structure of claim 6, wherein: Petal units (20a) are arranged between adjacent spoke units (20b), and the two ends of the petal unit (20a) are respectively matched or blocked with two adjacent spoke units (20b).

8. The spoke, rim structure of claim 5, wherein: The petal unit (20a) is provided with a protrusion (22) and / or a recess (23); the inner side wall of the rim (10) has an annular groove (11) for accommodating the outer periphery plate edge of the spoke (20), and the annular groove (11) covers the outer periphery plate edge of the spoke (20) and the protrusion (22) and / or the recess (23) arranged at the outer periphery plate edge.

9. The spoke, rim structure of claim 5, wherein: The size of the spoke unit (20b) in the axial direction of the spoke (20) is greater than the size of the petal unit (20a) in the axial direction of the spoke (20).

10. The spoke, rim structure of claim 5, wherein: The rim (10) is formed by combining two or more rim unit segments (10a), the same petal unit (20a) is respectively connected with two adjacent rim unit segments (10a) in a plug-in manner, or the same spoke unit (20b) is respectively connected with two adjacent rim unit segments (10a) in a plug-in manner.

11. A guide wheel having a spoke, rim structure according to any one of claims 1-10, characterized in that: The spoke (20) is provided with a central through hole (21) for the wheel hub or wheel shaft to pass through, and the spoke (20) is provided with a weight-reducing hole (24).

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