Guide wheel assembly

Abstract

The utility model belongs to the technical field of agricultural mechanical parts, and particularly relates to a guide wheel assembly which comprises a hub integrally in a tubular shape and a rim integrally in a ring shape, and the rim is formed by combining two or more rim unit sections. The spokes are connected with the hub and the rim in a transition mode, and the outer end of the same spoke is connected with the two adjacent rim unit sections in an inserted mode and forms circumferential limiting fit with the rim unit sections. The spokes which are in transition connection with the hub and the rim are further used for achieving positioning installation of the rim unit sections, relative displacement of the spokes and the rim in the circumferential direction of the rim can be effectively limited, damage to the wheel body caused by loose connection of the spokes and the rim after long-term use is avoided, and the reliability of the guide wheel body structure is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to agricultural machinery parts technical field, in particular to a guide wheel subassembly. BACKGROUND

[0002] The prior application CN217918174U of the applicant provides a guide wheel for facilitating production and machining of the guide wheel, comprising a hub, a web plate and a rim, a plurality of petal bodies are combined to form a web plate in the shape of a ring plate as a whole, the outer plate edge of the web plate is connected with the rim in a plug-in connection mode, and the hub is arranged in a middle connecting hole of the web plate and is fixedly connected with the hole of the middle connecting hole. Since the hub, the web plate and the rim are produced and machined 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 rim and the web plate, even if the rim and the web plate are connected by welding, the welding will be easily disconnected after long-term use, thereby causing the rim and the web plate to rotate relative to each other, resulting in wear of the web plate body and making the reliability and service life of the guide wheel unable to meet the requirements. SUMMARY

[0003] The utility model aims at providing a guide wheel subassembly capable of preventing the rim and the web plate part from rotating relative to each other.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of a guide wheel subassembly, comprising a hub in the shape of a pipe as a whole and a rim in the shape of a ring as a whole, the rim is formed by combining two or more rim unit segments; a spoke is used to transitionally connect the hub and the rim, and the outer end of the same spoke is respectively connected with two adjacent rim unit segments in a plug-in connection mode and forms a circumferential limiting cooperation with the rim unit segments.

[0005] Compared with the prior art, the utility model has the following technical effects: the spoke used to transitionally connect the hub and the rim is also used to realize positioning and installation of the rim unit segment, can effectively limit the relative displacement of the spoke and the rim in the circumferential direction of the rim, thereby avoiding damage to the wheel body caused by loosening of the connection between the spoke and the rim after long-term use, and ensuring the reliability of the structure of the guide wheel wheel body. BRIEF DESCRIPTION OF DRAWINGS

[0006] The contents expressed by each drawing of the specification and the marks in the drawings are briefly described as follows:

[0007] Figure 1 It is a perspective schematic view of an embodiment;

[0008] Figure 2 , 3 It is a perspective schematic view of the cooperation state of the rim unit segment, the petal body and the spoke;

[0009] Figure 4 It is a perspective schematic view of the rim unit segment;

[0010] Figure 5 This is a three-dimensional diagram of the spokes;

[0011] Figure 6 This is a three-dimensional schematic diagram of the valve body;

[0012] Figure 7 This is the front view of the embodiment;

[0013] Figure 8 yes Figure 7 AA section view in the middle;

[0014] Figure 9 yes Figure 7 BB section view in the middle;

[0015] Figure 10 This is a front view of the spokes and the valve body in their mating state. Detailed Implementation

[0016] 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.

[0017] A guide wheel assembly, as shown in the attached figure Figure 1 , 8 As shown, the wheel includes a hub 10 and a rim 20. The hub 10 is generally stepped tubular, and the rim 20 is generally annular. The rim 20 is formed by combining two or more rim unit segments 20a. The hub 10 and the rim 20 are connected by spokes 30. The outer ends of the same spoke 30 are respectively inserted and connected to two adjacent rim unit segments 20a to form a circumferential limiting fit.

[0018] The rim 20 has an outer peripheral mating surface 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 of the rim should be coaxially arranged with the core of the hub 10. In this embodiment, the outer peripheral surface of the rim 20 is generally a smooth cylindrical surface. Therefore, the cylindrical outer peripheral surface of the rim 20 is coaxially arranged with the core of the hub 10, that is, the core of the hub 10 coincides with the core of the outer peripheral surface of the rim 20.

[0019] As attached Figure 2 As shown, the spokes 30 include a spoke body 30a exposed between the hub 10 and the rim 20, and a connector 30b extending into the interior of the rim 20 body. The inner wall of the rim unit segment 20a is provided with a slot 21 that matches the partial outer contour of the connector 30b. In a specific implementation, the spokes 30 are used to connect the rim unit segments 20a to form a ring-shaped rim 20. Then, the hub 10 is inserted into the central space formed by the spokes 30, and the hub 10 and the spokes 30 are welded together, thus completing the assembly and production of the guide wheel. The production operation of the guide wheel is simple and convenient.

[0020] It should be noted that when the spokes 30 connect each rim unit segment 20a to form a complete annular rim 20, each rim unit segment 20a is connected to different spokes 30 at both ends. The spokes 30 placed at both ends of the same rim unit segment 20a are arranged at an angle to the separation direction of that rim unit segment 20a, forming a self-locking structure between the spokes 30 and the rim 20. In this way, by simply limiting the displacement of the spokes 30 in its length direction, i.e., limiting the displacement of the spokes 30 in the radial direction of the rim 20, the installation posture of the rim 20 can be effectively maintained. Therefore, only welding the hub 10 and the spokes 30 is needed to ensure the reliability of the entire guide wheel structure. Clearly, the connection structure between the spokes 30 and the rim unit segment 20a in this embodiment can effectively limit their relative rotational displacement. Reliable assembly of the guide wheel can be achieved without welding the spokes 30 and the rim 20, reducing the amount of welding work and fundamentally avoiding the risk of detachment after long-term use.

[0021] The spokes 30 are inserted into the rim unit segment 20a. This allows for the combined installation of the rim unit segment 20a while effectively limiting the relative displacement of the two components in the circumferential direction of the rim 20. This effectively prevents the rim 20 from loosening and rotating relative to the hub 10 or the spokes 30 around its circumference after long-term use, ensuring the reliability of the guide wheel structure. In this embodiment, the hub 10, rim 20, and spokes 30 are all made of metal. Therefore, welding is the preferred connection method between the spokes 30 and the hub 10. In other embodiments, other materials or other commonly used fixing connection methods can be used for each component.

[0022] To achieve the positioning and installation of spoke 30 and rim unit segment 20a, as shown in the attached... Figure 3 , 4 As shown in Figure 5, the connector 30b is generally a block shape that is thin in the middle and thick on both sides in the circumferential direction of the wheel body. See attached figure for details. Figure 5 As shown, one end of the spoke 30, which is generally square in shape, forms a connector 30b. The connector 30b is a block shape that is thin in the middle and thick on both sides in the width direction of the spoke 30, and its cross-section has protrusions at both ends in the width direction of the spoke 30. Since the groove of the slot 21 matches the outer contour of the connector 30b, when the rim unit segment 20a is connected to the connector 30b of the spoke 20, as shown in the attached figure... Figure 5The protruding part in the up-down direction shown in the figure will abut against the slot wall of the slot one 21, thereby limiting the relative displacement of the spoke 30 and the rim unit segment 20a in the circumferential direction of the rim 20. In another embodiment, the plug-in head 30b can also be a "concave" block shape as a whole in the radial direction of the wheel body, i.e. the outer end of the plug-in head 30b has a suspended plug-shaped part which can be inserted into the slot cavity of the slot one 21. Similarly, the suspended plug-shaped part cooperates with the corresponding slot cavity of the slot one 21 to limit the relative displacement of the spoke 30 and the rim unit segment 20a in the circumferential direction of the rim 20, thereby achieving the positioning and installation of the rim unit segment 20a.

[0023] The embodiment is shown in the accompanying drawings Figure 5 、 10 As shown in the figure, the spoke 30 is in the shape of a rectangular strip as a whole, and the two side walls of the spoke 30 are arranged in parallel along the length direction. In other embodiments, the two side walls of the spoke 30 can also be curved or folded. In the assembled state, the spoke 30 is arranged in the radial direction of the rim 20, i.e. the length direction of the spoke 30 coincides with the radial direction of the rim 20, so that the force acting on the rim 20 can be quickly transmitted to the hub 10 along the shortest path in the radial direction of the spoke 30. In order to facilitate assembly, the slot one 21 is correspondingly provided in the embodiment, and the slot opening is directed to the toroidal core of the rim 20.

[0024] In addition, since the spoke 30 is used to position and install the rim unit segment 20a, in order to ensure the reliable connection of the spoke 30 and the rim 20, the plug-in head 30b should have a relatively large structural strength. Therefore, in the preferred solution, the structural strength of the plug-in head 30b should be superior to that of the spoke body 30a. Therefore, without changing the peripheral contour of the spoke 30, the maximum thickness value of the spoke body 30a in the embodiment is less than or equal to the maximum thickness value of the plug-in head 30b, i.e. the strength of the part is enhanced by thickening the plug-in head 30b, so as to ensure the reliability of the connection of the spoke 30 and the rim 20.

[0025] In the preferred solution, in order to facilitate the installation operation of the operating personnel, the plug-in head 30b is symmetrically arranged relative to the median plane in the thickness direction of the spoke 30. In the embodiment, the thickness direction of the spoke 30 is the axial direction of the guide wheel body, as shown in the accompanying drawings Figure 5 In the embodiment shown in the figure, the plug-in head 30b is symmetrically arranged along the median plane in the up-down direction of the figure, so that when assembling, it is not necessary to distinguish whether the spoke 30 and the rim unit segment 20a have front and back surfaces.

[0026] As shown in the accompanying drawings Figures 2-5 In the embodiment, two positioning elements 32 are arranged on the plug-in head 30b at intervals, and the positioning elements 32 can be formed by outwardly protruding the spoke 30 body in the thickness direction, i.e. the positioning elements 32 are outwardly protruding from the spoke 30 body in the thickness direction, as shown in the accompanying drawings Figure 5The shown upward and downward convex bosses or ribs are attached to the surface of the bar-shaped spoke 30 body. As shown in the attached Figure 4 As shown, the expansion slot cavity 212 is recessed on both sides of the positioning element 32 along the axial direction of the rim 20. The positioning element 32 is inserted into the expansion slot cavity 212, and the outer wall of the positioning element 32 is in abutting cooperation with the cavity wall of the expansion slot cavity 212 to form a limiting cooperation in the circumferential direction of the rim 20. In another embodiment, the positioning element 32 can also be formed by the spoke 30 body extending outward along its length direction. The length direction of the spoke 30 body is preferably the radial direction of the guide wheel body. Correspondingly, the expansion slot cavity 212 should be recessed outward along the radial direction of the rim 20. Figure 5 In the shown embodiment, the upper and lower surfaces of the spoke 30 are respectively provided with the positioning element 32. In other embodiments, the positioning element 32 can also be provided only on the upper or lower surface of the spoke 30.

[0027] In order to reliably position one spoke 30 in the two rim unit segments 20a, as shown in the attached Figure 4 , 5 As shown, the two positioning elements 32 are respectively arranged on the two sides of the width direction of the plug-in head 30b, and the expansion slot cavity 212 is arranged in the interval of the end face of the rim unit segment 20a. As shown in the attached Figure 4 As shown, the rim unit segment 20a is respectively provided with the insertion slot one 21, and when the adjacent end faces of the two rim unit segments 20a are abutted, the slot cavities of the two insertion slot ones 21 respectively arranged on the different rim unit segments 20a on both sides of the abutting face are connected and form a cavity which is consistent with the complete outer contour of the plug-in head 30b. After assembly, there is no gap or small gap between the two adjacent rim unit segments 20a, which can effectively prevent dust or liquid from entering the abutting face of the two rim unit segments 20a, thereby ensuring the reliability of the rim 20 and prolonging its service life.

[0028] Further, as shown in the attached Figure 5 , 8 , 9, the positioning element 32 extends to the side where the rim 20 core is located along the length direction of the spoke 30 and forms a reinforcing rib 33 on the surface of the spoke body 30a. The reinforcing rib 33 is in the form of a rib strip as a whole, and the protrusion height of the reinforcing rib 33 gradually decreases from the outside to the inside. The reinforcing rib 33 can effectively improve the stability and reliability of the structure of the spoke 30 itself.

[0029] In this embodiment, three spokes 30 are arranged at equal angles along the circumference of the hub 10, and a plate-shaped petal 40 is arranged between the adjacent two spokes 30. In other embodiments, two or more than three spokes 30 can also be arranged according to the needs. As shown in the attached Figure 10As shown, the inner contour of the petal body 40 is consistent with the inner contour of the spoke 30, and in specific implementation, the inner end of the petal body 40 abuts against the outer peripheral wall of the hub 10, and the outer end is in plug-in cooperation with the rim 20. The inner wall of the rim 20 is provided with a second insertion slot 22 for the outer plate edge of the petal body 40 to be inserted, and the slot opening of the second insertion slot 22 points to the core of the rim 20. In this way, the petal body 40 can not only fill the gap between the adjacent spokes 30 to prevent the displacement of the spoke 30, but also provide radial support for the rim 20, and share the load with the spoke 30, thereby significantly improving the load-bearing capacity of the guide wheel.

[0030] As shown in the accompanying drawings, Figure 6 The petal body 40 is in the shape of a fan, and the inner plate edge and the outer plate edge are arc-shaped edges. Further, in order to facilitate production and processing, the inner plate edges of the petal bodies 40 are concentric, and the outer plate edges of the petal bodies 40 are concentric. In this embodiment, the common circle of the inner plate edges of the petal bodies 40 is arranged with the common circle of the outer plate edges of the petal bodies 40, and the diameter of the common circle of the inner plate edges of the petal bodies 40 is consistent with the outer diameter of the hub 10, and the common circle of the outer plate edges of the petal bodies 40 is consistent with the inner diameter of the slot bottom wall of the second insertion slot 22 on the rim 20. In this way, the force borne by the rim 20 can be quickly and effectively transmitted to the hub 10 through the petal body 40, thereby providing radial support for the rim 20.

[0031] As shown in the accompanying drawings, Figure 10 The adjacent petal bodies 40 are in close contact or gap cooperation with the adjacent side walls of the spokes 30, and the petal bodies 40 fill the space between the adjacent spokes 30, which can limit the rotational displacement of the spoke 30 around the axis core of the rim 20, improve the stability and reliability of the installation of the spoke 30, and further improve the structural strength of the guide wheel body. The cavities of the adjacent first insertion slot 21 and the second insertion slot 22 are connected, that is, the inner ring of the rim 20 is provided with a continuous annular slot composed of the first insertion slot 21 and the second insertion slot 22.

[0032] Since the petal body 40 is used to bear the load, the petal body 40 should not be too thin, and in the preferred solution, the plate thickness of the petal body 40 is greater than or equal to the minimum thickness of the spoke body 30a exposed between the hub 10 and the rim 20. As shown in the accompanying drawings, Figure 2 In this embodiment, the plate thickness of the petal body 40 is consistent with the body plate thickness of the spoke body 30a, so that the petal body 40 and the spoke body 30a can be combined to form a spliced spoke plate with consistent plate thickness, thereby improving the integrity of the guide wheel body while ensuring the reliability of the spoke plate area of the guide wheel.

[0033] In order to reduce the weight of the guide wheel and make the guide wheel more portable and easy to use, the petal body 40 is provided with a weight-reducing hole 41, and the petal body 40 is provided with a weight-reducing hole 41.

[0034] In another embodiment, the circle shared by the inner plate edges of the respective petals 40 and the circle shared by the outer plate edges of the respective petals 40 can be arranged eccentrically, so that the mass center of the spoke portion between the hub 10 and the rim 20 and the rotation center of the wheel body in the mounted state are arranged eccentrically, the rotational inertia of the wheel body can be increased, although the starting force required for the wheel body to rotate is increased, the stability of the guide wheel in the rotating state is high, when the guide wheel rotates, the interaction force between the spoke 30 and the rim 10 is small, that is, the shear force borne by the plug-in joint 30b is small, thereby the service life of the spoke 30 can be prolonged, and the reliability of the connection between the spoke 30 and the rim 10 after long-term use can be improved.

[0035] In specific implementation, the effective connection of the components of the guide wheel can be achieved by welding the inner end of the spoke 30 to the hub 10. In order to facilitate the welding work of the spoke 30 and the hub 10, the inner end of the reinforcing rib 33 is arranged in the inner side end face of the spoke 30 in the embodiment as shown in the accompanying drawings, and the distance between the reinforcing rib 33 and the hub 10 in the assembled state is the space reserved for the welding seam. Figure 3 In specific implementation, the effective connection of the components of the guide wheel can be achieved by welding the inner end of the spoke 30 to the hub 10. In order to facilitate the welding work of the spoke 30 and the hub 10, the inner end of the reinforcing rib 33 is arranged in the inner side end face of the spoke 30 in the embodiment as shown in the accompanying drawings, and the distance between the reinforcing rib 33 and the hub 10 in the assembled state is the space reserved for the welding seam.

Claims

1. A guide wheel assembly comprising a wheel hub (10) which is tubular in overall form and a wheel rim (20) which is annular in overall form, characterised in that: The rim (20) is formed by two or more rim unit segments (20a), the spokes (30) are connected between the hub (10) and the rim (20), the outer ends of the same spoke (30) are respectively inserted into the connecting ends of two adjacent rim unit segments (20a), and the inserted spoke (30) and the rim unit segment (20a) are limitedly matched in the circumferential direction of the rim (20).

2. The guide wheel assembly of claim 1, wherein: The spoke (30) comprises a spoke body (30a) arranged between the hub (10) and the rim (20) and a plug-in head (30b) extending into the body of the rim (20), and the inner wall of the rim unit segment (20a) is provided with a first insertion slot (21) matching the outer contour of the plug-in head (30b), and the slot opening of the first insertion slot (21) is directed to the core of the rim (20). The plug-in head (30b) is in the shape of a block with thin middle and thick sides in the circumferential direction of the wheel body, or the plug-in head (30b) is in the shape of a concave block with short middle and long sides in the radial direction of the wheel body.

3. The guide wheel assembly of claim 2, wherein: The plug-in head (30b) is symmetrically arranged relative to the middle plane of the thickness direction of the spoke (30).

4. The guide wheel assembly of claim 2, wherein: The maximum thickness value of the spoke body (30a) is less than or equal to the maximum thickness value of the plug-in head (30b).

5. The guide wheel assembly of claim 2, wherein: Two positioning elements (32) are arranged on the plug-in head (30b) at intervals. The positioning element (32) is formed by the spoke body (30a) protruding outward along the length direction thereof, and the first insertion slot (21) is correspondingly provided with an expansion groove cavity (212) formed by recessing outward in the radial direction of the rim (20). Or the positioning element (32) is formed by the spoke body (30a) protruding outward along the thickness direction thereof, and the first insertion slot (21) is correspondingly provided with an expansion groove cavity (212) formed by recessing to both sides in the axial direction of the rim (20). The positioning element (32) is inserted into the expansion groove cavity (212) correspondingly provided in the first insertion slot (21), and the outer wall surface of the positioning element (32) is abuttingly matched with the cavity wall of the expansion groove cavity (212) to form a limiting fit in the circumferential direction of the rim (20).

6. The guide wheel assembly of claim 5, wherein: The two positioning elements (32) are separately arranged on the two sides in the width direction of the plug-in head (30b), and the expansion groove cavity (212) is arranged at intervals with the end surface of the rim unit segment (20a); the two ends of the rim unit segment (20a) are respectively provided with the first insertion slot (21), and when the adjacent end surfaces of the two rim unit segments (20a) are abutted, the groove cavities of the two first insertion slots (21) separately arranged on the different rim unit segments (20a) on both sides of the abutted surface are communicated and form a cavity matching the outer contour of the complete plug-in head (30b).

7. The guide wheel assembly of claim 5, wherein: The positioning element (32) extends to the side where the core of the rim (20) is located along the length direction of the spoke (30) and forms a reinforcing rib (33) on the surface of the spoke body (30a), the reinforcing rib (33) is in the shape of a rib strip, and the protrusion height of the reinforcing rib (33) gradually decreases from outside to inside.

8. A guide wheel assembly according to any one of claims 1-7, characterized in that: The spokes (30) are arranged at equal angles around the circumference of the hub (10) at three or more, and a plate-shaped petal body (40) is arranged between the two adjacent spokes (30).

9. The guide wheel assembly of claim 8, wherein: The spoke (30) is in the shape of a rectangular strip, and the length direction of the spoke (30) is consistent with the radial direction of the rim (20); the petal body (40) is in the shape of a fan, and the two end plate edges are straight edges, and the inner plate edge and the outer plate edge are arc-shaped edges, and the inner plate edges of the petal bodies (40) are concentric, and the outer plate edges of the petal bodies (40) are concentric.

10. The guide wheel assembly of claim 8, wherein: The inner end of the petal body (40) is fixedly connected with the outer peripheral wall of the hub (10), and the outer end of the petal body (40) is in plug-in cooperation with the rim (20); the inner wall of the rim (20) is provided with a second insertion groove (22) for the outer plate edge of the petal body (40), and the slot opening of the second insertion groove (22) points to the core of the rim (20); the slot cavities of the adjacent first insertion groove (21) and the second insertion groove (22) are communicated; and the petal body (40) is provided with a weight-reducing hole (41).

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