Agricultural Ground Engaging Chains and Connecting Systems

Abstract

A connecting assembly (3) for an agricultural ground engaging chain (1) comprising a plurality of connecting assemblies, the connecting assembly comprising: a first component (7) having a first clamping portion (21) and a first connecting portion (13) for connecting to a connecting portion of an adjacent connecting assembly; a second component (9) having a second clamping portion (27) and a second connecting portion (15) for connecting to a connecting portion of an adjacent connecting assembly; a rake component (5) having a first side (17) and an opposite second side (19); at least one elastic spring plate (22), wherein the elastic spring plate is elastically deformable, and at least one fastening element (11). The elastic spring plate urges the first and second components (7, 9) to hold the components of the connecting assembly together.

Description

Technical Field

[0001] The present invention relates to agricultural equipment, in particular to harrows for preparing soil for agricultural use. The present invention particularly relates to agricultural equipment of the type comprising a chain linking the harrow components. Background Art

[0002] Harrowing has been used by farmers to help prepare the soil for tillage. This can include breaking up the soil, furrowing it, and depositing the broken-up material into the ground. It can also include uprooting and breaking up residue from previous harvests or other plant material, such as weeds.

[0003] It is known to provide a rake comprising a plurality of disks (rake components) connected together to form a chain. The chain is pulled along the ground surface, causing the disks to roll and engage the ground, breaking up the soil and other materials therein. Typically, the surface of the disks is angled relative to the direction of travel to provide an angle of attack between the disks and the soil.

[0004] Such harrows can be mechanized, with a disc chain extending between two sides of a frame that is towed by a tractor or other agricultural equipment. This known type of harrow is described in Australian Patent No. 2007216912. In this prior art, each link in the chain includes a harrow disc and a pair of connecting parts, such as a hook and a loop, disposed on either side of the disc. To form the chain, the hook is hooked into the loop of the adjacent link, and the chain is tensioned to prevent the links from unhooking and separating. To disconnect the links, the tension is released, allowing the links to unhook.

[0005] For example, a known system described in AU 2007216912 has a chain formed by connections in which the hook, loop, and disc are all integrally formed. For example, the disc, hook portion, and loop portion are welded together. In another embodiment, the connected hook, loop, and disc can be formed by a single casting, forging, or other integral forming technique. This facilitates assembly and disassembly by the user, as one only needs to hook and unhook the connection.

[0006] However, when the links are integral, it may be impractical to maintain or repair individual links that become worn or damaged. For example, if the hook portion breaks or becomes damaged, the entire chain may need to be discarded, even if the loop portion and the rake disc are still usable. Similarly, if the rake disc becomes worn or damaged during use, the chain may need to be discarded, even if the loop portion and hook portion are still usable.

[0007] In addition, integral connection may result in the restriction of the manufacturing method and material properties to the connection. This may also result in a compromise between the required performance of the disc and the material. For example, the ring and hook portion have the main function of linking the connection together, while the harrow disc has the function of colliding with and engaging with the soil. Therefore, the harrow disc may wear out at a higher rate than the hook ring and requires a higher wear resistance and toughness / hardness than the other parts. Therefore, the integral connection or the integrally formed connection may comprise a compromise in material properties. There may also be financial costs because the connected part may therefore be made of a material that exceeds actual requirements or be formed through technology.

[0008] For example, it is known to manufacture a connection with a harrow disc, a ring portion and a hook portion in a single casting. Compared to other (and usually more expensive) technologies, cast components can produce weaker components. Therefore, in order to obtain an acceptable strength of the harrow disc, a connection formed as a whole by casting may require the harrow disc to be thicker and heavier than a forged harrow disc. However, for technical and financial reasons, the ring and hook portion formed by casting are acceptable.

[0009] Any discussion of documents, acts, materials, devices, articles of manufacture or the like included in this specification is not to be construed as an admission that any or all of these matters form part of the prior art base or were common general knowledge in the field relevant to the present invention as it existed before the priority date of each claim of this application.

[0010] Throughout this specification, the word "comprise" or variations such as "comprises" or "comprising" will be understood to imply the inclusion of stated elements, integers or steps, or groups of elements, integers or steps, but not the exclusion of any other elements, integers or steps, or groups of elements, integers or steps. Summary of the Invention

[0011] 18. The agricultural machinery according to claim 17, wherein the yoke is a chain linking member and a plurality of link assemblies ...

[0012] A connecting assembly for an agricultural land engaging chain, the connecting assembly comprising a plurality of connecting assemblies, the connecting assembly comprising: a first component having at least one first fastener receiving passage, a first clamping portion, and a first connecting portion for connecting to a connecting portion of an adjacent assembly; a second component having at least one second fastener receiving passage, a second clamping portion, and a second connecting portion for coupling to a connecting portion of another adjacent connecting assembly; a rake component having a first side and an opposing second side; a resilient spring plate, wherein the resilient spring plate is resiliently deformable; and at least one fastener having a shaft extending along a central shaft axis; wherein, when the connecting assembly is assembled, the shaft is positioned at least partially through the first and second fastener receiving passages; the rake component and the resilient spring plate are positioned between the clamping portions of the first and second components; and the resilient spring plate is resiliently deformed such that a resultant stress in the resilient spring plate causes a wall portion of each of the first and second fastener receiving passages to urge the shaft toward the shaft axis to increase a maximum static friction force between the wall portions of the first and second fastener receiving passages and the shaft.

[0013] In one example of a connecting assembly; the first component includes a protruding portion opposite the first connecting portion, wherein the first fastener receiving channel is arranged in the protruding portion, the second component includes a socket opposite the second connecting portion, wherein the socket is adapted to accommodate at least a portion of the protruding portion, the rake component includes a rake hole, and the elastic spring plate includes a plate hole, wherein when the connecting assembly is assembled, the first component passes through the rake hole and the plate hole, and the protruding portion and the first fastener receiving channel are positioned near the second side of the rake component, and wherein when the connecting assembly is assembled, at least a portion of the protruding portion is positioned in the socket, and the first fastener receiving channel and the second fastener receiving channel are aligned to position the shaft.

[0014] In some examples of the connection assembly, the rake component has a first side and an opposing second side, wherein the first side faces the clamping portion of the first component and the second side faces the clamping portion of the second component when the connection assembly is assembled, wherein the resilient spring plate is positioned: between the first side and the clamping portion of the first component or between the second side and the clamping portion of the second component.

[0015] In some examples of the connection assembly, the rake component is generally disc-shaped or dish-shaped, wherein the first side has a concave surface, and wherein the resilient spring plate is positioned adjacent the first side.

[0016] In some examples of the connection assembly, the resilient spring plate is a circular plate.

[0017] In some examples of the connection assembly, the first and second connection portions are formed from hook portions or loop portions.

[0018] In some examples of the connector assembly, a first connector portion on a first side of the target component includes a ball-shaped end. A second connector portion on a second side of the target component includes a socket. To connect with an adjacent connector assembly, the ball-shaped end is received in a corresponding socket of the adjacent connector assembly, and the socket receives a corresponding ball-shaped end of another adjacent connector assembly.

[0019] In another example of the connection assembly, the second connection portion includes a first bearing surface that at least partially defines the socket, and wherein at least a portion of the first bearing surface faces the second side of the rake component, wherein the first bearing surface engages the corresponding ball end when the corresponding ball end is received in the socket to resist movement of the corresponding ball end in a direction away from the second side.

[0020] In another example of the connection assembly, the first bearing surface is formed by a flange extending inwardly around the socket aperture of the socket, and the second connection portion further includes a track to allow a corresponding ball-shaped end to be inserted into the socket.

[0021] In some examples, the resilient spring plate comprises spring steel.

[0022] In some examples, the rake component is substantially rigid.

[0023] In further examples of the connection assembly, the at least one resilient spring plate includes a plurality of resilient spring plates, wherein a combination of the plurality of resilient spring plates and the rake member are clamped between the first clamping portion and the second clamping portion.

[0024] In some examples, the plurality of resilient spring plates include: a first spring plate; and at least a second spring plate.

[0025] In some examples, the first spring plate and the second spring plate are configured with different respective spring constants.

[0026] In some examples of the connection assembly, the first spring plate and the second spring plate are circular plates configured to have different respective diameters.

[0027] In some examples of the connection assembly, the first spring plate and the second spring plate are configured to have different respective thicknesses.

[0028] In some examples of the connection assembly, the plurality of resilient spring plates includes at least two substantially identical spring plates.

[0029] In some examples of the connection assembly, the plurality of resilient spring plates further includes one or more subsequent spring plates.

[0030] Also disclosed is an agricultural ground engaging chain comprising a plurality of the connecting assemblies described herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 shows a perspective view of an agricultural ground engaging chain according to a first example;

[0032] Figure 2 Shown for Figure 1 A top perspective view of a connecting assembly of an agricultural ground engaging chain;

[0033] Figure 3 yes Figure 2 a side view of a connection assembly;

[0034] Figure 4 yes Figure 2 a cross-sectional side view of the connection assembly without the fastener and with the resilient spring plate in a relaxed state;

[0035] Figure 5 is used for Figure 2 A perspective view of the elastic spring plate of the connecting assembly;

[0036] Figure 6 yes Figure 5 A front view of an elastic spring plate;

[0037] Figure 7 yes Figure 5 A cross-sectional side view of the elastic spring plate;

[0038] Figure 8 yes Figure 7 a detailed view of a portion of the elastic spring plate;

[0039] Figure 9 is used for Figure 2 A front view of the rake component of the connection assembly;

[0040] Figure 10 yes Figure 9 a side view of a rake assembly;

[0041] Figure 11 yes Figure 9 a rear view of the rake assembly;

[0042] Figure 12 yes Figure 11 a cross-sectional side view of a rake component;

[0043] Figure 13 is used for Figure 2 a cross-sectional side view of a first component of the connecting assembly including a hook portion;

[0044] Figure 14 yes Figure 13a top perspective view of a first component;

[0045] Figure 15 yes Figure 13 a bottom perspective view of the first component;

[0046] Figure 16 is used for Figure 2 a cross-sectional side view of a second component of the connection assembly including a ring portion;

[0047] Figure 17 yes Figure 16 a rear perspective view of the second component;

[0048] Figure 18 yes Figure 16 a front perspective view of the second component;

[0049] Figure 19 is used for Figure 2 a perspective view of a fastener of a connection assembly;

[0050] Figure 20 shows a top view of an agricultural ground engaging chain according to a second example;

[0051] Figure 21 Shown Figure 20 Side view of an agricultural ground engaging chain;

[0052] Figure 22 Shown for Figure 21 A top view of a connecting assembly of an agricultural ground engaging chain;

[0053] Figure 23 Shown Figure 22 a cross-sectional side view of the connection assembly without the fasteners and with the resilient spring plate in a relaxed state;

[0054] Figure 24 Shown for Figure 22 a perspective view of a first component of a connection assembly;

[0055] Figure 25 Shown Figure 24 a top view of the first component;

[0056] Figure 26 Shown Figure 25 sectional side view of the first component.

[0057] Figure 27 shows an exploded view of a connection assembly having a plurality of resilient spring plates for an agricultural ground engaging chain according to a third example;

[0058] Figure 28 Shown Figure 27 A top perspective view of the connected components in FIG;

[0059] Figure 29 yes Figure 27 a side view of a connection assembly; and

[0060] Figure 30 yes Figure 27 and 29 A cross-sectional side view of the connection assembly is shown without fasteners and with the plurality of resilient spring plates in a relaxed state. DETAILED DESCRIPTION

[0061] Incorporated by reference: WO 2015 / 131246 and WO 2019 / 148240

[0062] The concepts of the present invention may be applied to one or more of the agricultural ground engaging chains and connection systems disclosed in WO 2015 / 131246 (International Application No. PCT / AU2015 / 050086, filed on March 3, 2015) and WO 2019 / 148240 (International Application No. PCT / AU2019 / 050068, filed on January 31, 2019). The inventions disclosed in these publications share common inventors with the present invention. Furthermore, the contents of these publications are incorporated herein by reference.

[0063] In particular, the resilient rake components (and, if provided, the clamping subcomponents) disclosed in these earlier publications can be modified or otherwise adapted to use the rake components 5 and resilient spring plates 22 disclosed herein. Thus, rather than relying primarily on the resilient properties of the rake components (as provided in the examples of these prior publications), this modified system will use the resilient properties of the resilient spring plates 22 to apply a force to hold the components of the connected assembly together.

[0064] Overview of the First Example

[0065] Figure 1 An agricultural ground-engaging chain 1 according to one embodiment of the present invention is shown. The chain 1 is formed by connecting a plurality of connecting assemblies 3, 3', 3'". Each connecting assembly has a rake component 5, at least one resilient spring plate 22, a first component 7, a second component 9, and a fastening element (e.g., fastener 11) for assisting in holding or retaining the other components of the connecting assembly 3 together.

[0066] An agricultural ground engaging chain 1 is typically attached to a frame (not shown) which in turn is pulled by a tractor. The ends of the ground engaging chain are attached to a freely rotating spindle, allowing the chain 1 to rotate freely as the harrow member 5 moves across the ground.

[0067] The first component 7 has a first connecting portion 13, which in this embodiment is in the form of a hook 13. The second component 9 has a second connecting portion 15 implemented as a loop 15. The hook 13 and loop 15 of each connecting component 3 allow for releasable connection to the corresponding hook 13 and loop 15 of the adjacent connecting component 3', 3" to form the chain 1. The length of the chain 1 can be adjusted by hooking or unhooking the connecting components 3 to obtain the desired length. Other variations of the connecting portions can also be used and will be discussed in other examples below.

[0068] Figures 2 to 4 The assembled connection assembly 3 according to the first example is shown. In addition to the first connection portion 13, the first component 7 also includes a first clamping portion 21 (as an annular collar) and a first fastener receiving channel 23 positioned in the protrusion 25. In addition to the second connection portion 15, the second component 9 also includes a second clamping portion 27 and a second fastener receiving channel 29. The rake component 5 includes a first side 17 and an opposite second side 19. The elastic spring plate 22 is a substantially flat disk with a plate hole 42. As shown Figure 4 As shown, the rake member 5 and the resilient spring plate 22 are respectively clamped between the first and second clamping portions 21, 27. A fastener 11 having a shaft portion 12 with a central shaft axis is positioned through the first and second fastener receiving passages 23, 29 to help hold the components of the connection assembly 3 together.

[0069] When the connection assembly 3 is assembled, the resilient spring plate 22 elastically deforms under the pressure exerted between the first and second clamping portions 21, 27. As a result, the resilient spring plate 22 pushes the first clamping portion 21 in direction A. The resilient spring plate 22 also pushes the first side 17 of the rake component 5 in the opposite direction B. The second side 19 of the rake component 5, in turn, pushes the second clamping portion 27 in direction B. When the pressure is released, this resultant elastic stress forces the first and second components 7, 9 away from each other in opposite directions (A, B), against the fastener 11, and thereby holds the components of the connection assembly 3 together. Forcing the first and second components (7, 9) apart, in turn, causes the wall portion 24 of the first fastener receiving channel 23 to push against the shaft portion 12 toward the shaft axis, and the wall portion 30 of the second fastener receiving channel 29 to also push against the shaft portion 12 toward the shaft axis (perpendicular to directions A and B in this embodiment). In other words, this arrangement provides at least one normal force component between the surface of the shaft portion 12 and the corresponding wall portions of the first and second fastener receiving channels 23, 25. This has the effect of increasing the maximum static friction between the wall portions of the first and second fastener receiving passages 23 , 25 and the shaft portion 12 , thereby helping to retain the fastener 11 in the fastener receiving passages 23 , 25 and holding the other components of the connection assembly 3 together.

[0070] An advantage of having the resilient spring plate 22 separate from the rake component 5 is that it can be manufactured to have properties suitable for elasticity. For example, the spring plate 22 can be designed primarily to have elastic properties. This allows the rake component 5 to be manufactured to have properties suitable for its primary function as a rake component 5, including durability, toughness, and resistance to impact with the ground, roots, and rocks. This can also include having greater rigidity than the spring plate 22.

[0071] The components of the first example will now be described in detail.

[0072] Elastic spring plate 22

[0073] Figures 5 to 8 1 shows a view of a resilient spring plate 22. This example of a spring plate 22 is essentially a circular plate with a central plate hole 42. This includes an outer edge 44 around the perimeter and an inner edge 46 around the perimeter of the central plate hole 42. Figure 8 , which shows a detailed portion of the outer edge 44, which may include a bevel to contact the first side 17 of the rake member 5. In this example, the bevel is approximately 5 degrees (when in a relaxed state) from the flat surface of the planar spring plate 22. This bevel increases the contact surface between the resilient spring plate 22 and the rake member 5.

[0074] When Figure 4 When installed in the connection assembly 3 as shown, the circular outer edge 44 is biased against the first side 17 (causing the outer edge 44 to deflect in direction A). The inner edge 46, biased by the first clamping portion 21, deflects in direction B. When the first and second components 7, 9 are pulled toward each other, the resilient spring plate 22 deflects into a dished shape. The resulting elastic stress provides a restoring force / compression on the clamping portions 21, 27. In other words, the spring plate 22 acts like a spring on the clamping portions 21, 27.

[0075] It should be understood that in other examples, the resilient spring plate 22 may include a disc-shaped form.

[0076] The elastic spring plate 22 can be made of elastic metal or metal alloy. In one example, this can include spring steel. In some examples, this can include 65Mn spring steel.

[0077] Rake component 5

[0078] See also Figures 9 to 12 , the harrow member 5 is substantially disc-shaped with a circular edge around the periphery. This shape allows the harrow member 5 to rotate (ie roll) when the chain 1 is pulled across the soil surface.

[0079] The rake member 5 has a central aperture 41 extending between the first side 17 and the second side 19. The rake member 5 in this embodiment is disc-shaped, with the first side 17 having a concave surface and the second side 19 having a convex surface. This overall shape can facilitate soil engagement and manipulation. It also helps to clamp the components of the connecting assembly 3 together.

[0080] The resilient rake member 5 can be heat-treated, including surface hardening, to improve durability. Because the primary resilient mechanism is provided by the resilient spring plate 22, the entire surface of the rake member 5 can be heat-treated. This includes the rake member's circular guide, which may impact soil, rocks, roots, etc. during use. Furthermore, the central region of the rake member 5 can also be heat-treated, as in this example, this region does not need to maintain elasticity and resiliency. This latter point contrasts with the examples of rake members described in PCT / AU2015 / 050086 and PCT / AU2019 / 050068.

[0081] The rake component portion 5 may also include an anti-rotation aperture 53 that engages with other components of the connecting assembly 3. In one example, this includes engaging with a protrusion 39 of the second connecting portion 9. This prevents relative rotation between the rake component portion 5 and other components of the same connecting assembly 3. This can reduce wear and fatigue on the components. It should be understood that in examples, the first component 6 may be provided with a protrusion to engage with the rake component portion 5. In alternative examples, a slot, groove, or other structural feature may be used to engage with a component of the connecting assembly to prevent relative rotation.

[0082] First component 7

[0083] join Figures 13 to 15 , the first part 7 comprises a hook 13 for coupling with a ring 15 of another connecting assembly 3. The open hook 13 begins with a narrow point 31 which widens into an arcuate bend 33 extending towards the first clamping portion 21. The first clamping portion 21 is in the form of an annular collar.

[0084] The first clamping portion 21 is positioned in the central area of ​​the first component 7, and the protrusion 25 extends from the clamping portion 21 on the side opposite the hook 13. In this embodiment, the first clamping portion 21 has a flat annular surface to abut the surface of the elastic spring plate 22 near the inner edge 46.

[0085] In the illustrated embodiment, the protrusion 25 is adapted to pass through the central hole 41 of the rake member 5 and the central plate hole 42 of the resilient spring plate 22 and to be received in the second member 9. The first fastener receiving passage 23 extends through the protrusion 25. In this embodiment, the first fastener receiving passage 23 extends in a direction substantially perpendicular to the direction in which the protrusion 25 extends.

[0086] Second component 9

[0087] See also Figures 16 to 18 , the second part 9 comprises a loop 15 for coupling with the hook 13 of the other connecting component 3. The loop 15 is a substantially circular closed loop, the size of which is suitable for accommodating the hook 13.

[0088] In the central region of the second component 9 is a main body portion 47. The second clamping portion 27 is positioned adjacent the central main body portion 47, opposite the ring 15. In this embodiment, the second clamping portion 27 has a concave surface 49. When assembled, the concave surface 49 of the second clamping portion 27 faces and at least partially abuts a corresponding convex surface on the second side 19 of the target component 5. In this example, the concave surface 49 has a protrusion 39 for engaging with a corresponding anti-rotation hole 53 in the target component 5, thereby preventing relative rotation.

[0089] A channel or socket 51 extends from the concave surface 49 into the second component 9. The socket 51 is adapted to receive the protruding portion 25 of the first component 7. The socket extends from the concave surface 49 and into the central body portion 47, as shown. Figure 16 Thus, the second fastener receiving passage 29 passes through at least one side of the body portion 47 to the socket 51. The second fastener receiving passage 29 extends through the central body portion 47 in a direction perpendicular to directions A and B (when the connection assembly is as shown). Figure 4 Importantly, when assembled, this allows the first fastener receiving passage 23 of the protruding portion 25 to align with the second fastener receiving passage 29 of the central body portion 47 so that the shaft 12 of the fastener 11 can extend through both passages 23, 29.

[0090] The socket 51 has a profile that is complementary to the shape of the protrusion 25. For example, it can have a cylindrical profile to match the similarly shaped protrusion 25. In another embodiment, the protrusion 25 and the socket 51 can have rectangular or square cross-sectional shapes so that the protrusion 25 can only be inserted into the socket 51 in the correct orientation. It will be appreciated that other shapes and forms can also be used, such as a circular cross-section, an oval cross-section, a keyed cross-section, a circular cross-section with a section removed, etc.

[0091] Fastener 11

[0092] Reference Figure 19 , the fastener 11 may include a pin having a generally circular cross-section. The fastener 11 has a central shaft portion 112 having a relatively larger diameter than an opposing shaft end portion 116 having a smaller diameter. When assembled, the central shaft portion 112 is substantially positioned within the first fastener receiving passage 23, and the opposing end portion 116 is substantially positioned within the second fastener receiving passage 29.

[0093] Overview of the Second Example

[0094] Figure 20 and 21 Another example of an agricultural ground engaging chain 101 is shown. Figure 22 and 23 A connecting assembly 103 of an agricultural ground-engaging chain 101 is shown. Similar to the previous examples, the connecting assembly includes a first component 7, a second component 9, a rake component 5, a resilient spring plate 22, and at least one fastening element 11 (in this case, two pins). The resilient spring plate 22 functions similarly to the previous examples, urging the components to bear against the fastening element 11, thereby holding the components of the connecting assembly together.

[0095] The primary differences are between the first component 7 and the second component 9, which include some of the features described in PCT / AU2019 / 050068. The first component 7 includes a first clamping portion 21 and a first connecting portion 113. The first connecting portion 113 is disposed on a first side of the rake component 5, wherein the first connecting portion 13 includes a ball-shaped end 113. The second component 9 includes a second connecting portion 15 disposed on a second side 19 of the rake component 5 and including a socket 115. To form the chain 1, the ball-shaped end 113 of the connecting component 103 is received in a corresponding socket 115 of an adjacent connecting component.

[0096] See also Figure 23 , the second connecting portion 15 includes a first bearing surface 18 to at least partially define a socket 115. At least a portion of the first bearing surface 18 faces the second side 19 of the rake component 5. When a corresponding (adjacently connected) ball end 113 is received in the socket 115, the first bearing surface 18 engages the corresponding ball end 115 to resist movement of the corresponding ball end in a direction away from the second side 19. This resistance helps to tension the chain 1 including multiple connecting assemblies.

[0097] The first bearing surface 18 is formed by an inwardly extending flange 121 surrounding a socket hole 121 of the socket 115. The second connecting part 9 also includes a track 125 to allow the corresponding ball end 113 to be inserted into the socket 115. Once the ball end 113 is inserted into the socket 115, the track 125, or at least part of the track, can be closed by inserting a pin through the hole 161 to prevent the connection components from being disconnected from each other.

[0098] In some examples, the ball end 113 can rotate freely in the socket 115, so that adjacent connection assemblies 103 can rotate freely relative to each other about the main axis 29. This is in contrast to a hook and loop system, in which the hook has a limited degree of rotation between the hook and the loop. This can reduce torsional forces and stresses on the components of the chain 1 and the connection system 203.

[0099] Figures 24 to 26 A second example of a first component 7 is shown. The ball end 113 may have a curved T-shape or a mushroom shape. In some examples, the shape is symmetrical and rounded so that the ball end 113 can rotate within the socket 115. Having a rounded shape can prevent high forces and / or stresses at specific points.

[0100] A first clamping portion 21 in the form of an annular collar is positioned along the shank portion 141 to abut against the resilient spring plate 22. At the ball-shaped end and the opposite end of the shank portion 141 is a projection 51. When assembled, the projection 125 is inserted through the rake portion 5 and the resilient spring plate 22 into the second component 9. A plurality of first fastener receiving passages 125 (in the form of grooves extending perpendicular to the shank portion 141) are provided on the projection 125 so that the fasteners 11 can be passed through the first fastener receiving passages 123 (and through the second fastener receiving passages 29) to secure the first component 7 to the second component 9.

[0101] Overview of the Third Example

[0102] Figure 27 An exploded view of another example of a connecting assembly 203 for an agricultural ground engaging chain is shown. Similar to the previous examples, the connecting assembly 203 includes a first component 7, a second component 9, a rake component 5, and at least one fastening element 11 (not shown). The main difference is that instead of a single elastic spring plate 22, the connecting assembly 203 includes a plurality of elastic spring plates 222 and the rake component 5, which are clamped between a first clamping portion 21 and a second clamping portion 27. The function of the combination of the plurality of elastic spring plates 222 is to urge these components against the fastening element 11 and thus hold the components of the connecting assembly 203 together, as shown in FIG. Figure 28 and 29 Best shown in .

[0103] Multiple spring plates 222 can be combined to provide a desired spring quality or size. This can include selecting different types of spring plates 222 and the number of spring plates. This allows for adjustment so that an appropriate force or range of forces is applied to retain the components of the connection assembly. Adjustment can be beneficial, for example, when the type and / or size of the rake component 5 changes, or to compensate for wear or aging of components in the connection assembly.

[0104] exist Figure 27 In the example shown, the plurality of spring plates 222 include a first spring plate 224 and a second spring plate 226. The first spring plate 224 is a generally flat circular plate having an inner edge 46 at a central hole for abutting the first clamping portion 21. The second spring plate 226 is a generally flat circular plate having an outer edge 44 for contacting the first side 17 of the rake member 5.

[0105] In some examples, the second spring plate 226 further includes a pair of anti-rotation holes 253 to enable the protrusions 39 of the second connecting portion 9 to pass therethrough without interfering with the deflection of the second spring plate 226. In some examples, the protrusions 39 engage with the anti-rotation holes 253, thereby reducing any relative rotation or movement between the second spring plate 226 and the rake component 5 during use.

[0106] In this example, the first spring plate 224 does not have an anti-rotation hole. When the connection assembly is assembled, the first spring plate 224 covers the anti-rotation hole 253. This is advantageous in preventing dust or other foreign objects from entering the anti-rotation hole 253, 53 and the protrusion 39. Figure 28 and 30 Best shown in .

[0107] In some examples, the first spring plate 224 and the second spring plate 226 are configured to have different properties. This can include having different corresponding spring constants. This can also include different thicknesses, different diameters, and / or different materials. This composite structure can utilize different materials and physical properties. For example, the first spring plate 224 can be made of high-impact steel, as it is more likely to be subjected to impact and wear. The second spring plate 226, shielded by the first spring plate 224 and the target assembly 5 (thus less concerned with impact resistance), can be configured to have more favorable spring qualities.

[0108] The plurality of resilient spring plates 222 can be constructed of the same or other materials as discussed in the previous examples of resilient spring plates 22. In further examples, one or more resilient spring plates 222 can be sacrificial wear portions or other portions used as compliant members to retain the connection assembly 203.

[0109] In other examples, the plurality of resilient spring plates 222 may include more than two spring plates 222, 224. In some examples, this may include adding subsequent spring plates of the same size or type as the first spring plate 224 or the second spring plate 226 (or the spring plates 22 described in the previous embodiments). In some examples, the plurality of resilient spring plates are cascaded in size, with smaller diameter spring plates adjacent to the first clamping portion 21 and larger diameter spring plates adjacent to the rake member 5. Having multiple resilient spring plates 22 can provide an increased spring constant while reducing stress in each respective spring plate 222. This is similar to leaf springs used in wheeled vehicles (e.g., trucks), where a series of leaves are stacked together with progressively shorter leaves.

[0110] It will be appreciated by those skilled in the art that various changes and / or modifications may be made to the above embodiments without departing from the broad scope of the present invention. Therefore, the present embodiments are considered in all aspects to be illustrative rather than restrictive.

Claims

1. A connection assembly (3) for an agricultural ground engaging chain (1) comprising a plurality of connection assemblies, the connection assembly comprising: - a first component (7) having a first clamping portion (21) and a first connecting portion (13) for connecting to a connecting portion of an adjacent connecting component; - a second component (9) having a second clamping portion (27) and a second connecting portion (15) for connecting to a connecting portion of an adjacent connecting component; - a rake member (5) having a first side (17) and an opposite second side (19); - at least one elastic spring plate (22), wherein the elastic spring plate is elastically deformable, and - at least one fastening element (11), wherein, when the connection assembly is assembled, the rake component (5) and the elastic spring plate (22) are clamped between the first clamping portion (21) and the second clamping portion (27), and wherein, under applied pressure, the resilient spring plate (22) is elastically deformed to enable engagement of the at least one fastening element, whereby, upon release of the applied pressure, the resultant elastic stress in the resilient spring plate (22) urges the first and second components (7, 9) against the fastening element to hold the components of the connection assembly together.

2. A connection assembly for an agricultural ground engaging chain, the agricultural ground engaging chain comprising a plurality of said connection assemblies, the connection assembly comprising: - a first component (7) having at least one first fastener receiving channel (23), a first clamping portion (21) and a first connecting portion (13) for connecting to a connecting portion of an adjacent component; - a second component (9) having at least one second fastener receiving channel (29), a second clamping portion (27) and a second connecting portion (15) for connecting to a connecting portion of another adjacent connecting component; - a rake member (5) having a first side (17) and an opposite second side (19); - an elastic spring plate (22), wherein the elastic spring plate is elastically deformable; and - at least one fastener (11) having a shaft (12) extending along the axis of the central shaft; Wherein, when the connection assembly is assembled; - the shaft being positioned at least partially through the first and second fastener receiving passages; - the rake member (5) and the elastic spring plate (22) are positioned between the first and second clamping portions (21, 27) of the first and second members (7, 9); and - The elastic spring plate (22) is elastically deformed so that the resultant stress in the elastic spring plate (22) causes the wall portion (24, 30) of each of the first and second fastener receiving channels (23, 29) to push the shaft (12) toward the shaft axis to increase the maximum static friction between the wall portions of the first and second fastener receiving channels (23, 29) and the shaft (12).

3. The connection assembly according to claim 2, wherein: - the first component (7) comprises a protruding portion (25) opposite the first connecting portion (13), wherein the first fastener receiving channel (23) is arranged in the protruding portion (25), - the second component (9) comprises a socket (51) opposite the second connection portion (15), wherein the socket (51) is adapted to receive at least a portion of the protruding portion (25), - the rake member (5) comprises a rake hole (41), - the elastic spring plate (22) includes a plate hole (42), wherein, when the connection assembly is assembled, the first component (7) passes through the rake hole (41) and the plate hole (42), and the protrusion (25) and the first fastener receiving channel (23) are positioned adjacent the second side (19) of the rake component (5), and wherein, when the connection assembly is assembled, at least a portion of the protrusion (25) is positioned in the socket (51), and the first and second fastener receiving channels (23, 29) are aligned for positioning the shaft (12).

4. A connection assembly according to any one of the preceding claims, wherein: The rake member (5) has a first side (17) and an opposite second side (19), wherein, when the connection assembly is assembled, the first side (17) faces the first clamping portion (21) of the first member (7) and the second side (19) faces the second clamping portion (27) of the second member (9), Wherein, the elastic spring plate (22) is positioned: - between the first side (17) of the first component (7) and the first clamping portion (21), or - between the second side (19) of the second component (9) and the second clamping portion (27).

5. The connection assembly according to claim 4, wherein: The rake member (5) is substantially disc-shaped or dish-shaped, the first side (17) having a concave surface, and Wherein, the elastic spring plate (22) is positioned adjacent to the first side (17).

6. The connection assembly according to claim 1 or 2, wherein: The elastic spring plate (22) is a circular plate.

7. The connection assembly according to claim 1 or 2, wherein: The first and second connecting parts (13, 15) are formed by hook parts or loop parts.

8. The connection assembly according to claim 1 or 2, wherein: - the first connecting portion (13) comprises a bulbous end (113) at the first side (17) of the rake member (5); and - the second connection portion (15) comprising a socket (115) at the second side (19) of the rake member (5), In order to connect with an adjacent connecting component, the ball end (113) is received in a corresponding socket (115) of an adjacent connecting component (3), and the socket (115) receives a corresponding ball end (113) of another adjacent connecting component (3").

9. The connection assembly according to claim 8, wherein: The second connecting portion (15) comprises a first bearing surface (18) at least partially defining the socket (115), and wherein at least a portion of the first bearing surface (18) faces the second side (19) of the rake member (5), wherein, when the corresponding ball end (113) is received in the socket (115), the first bearing surface (18) engages the corresponding ball end (113) to resist movement of the corresponding ball end (113) in a direction away from the second side (19).

10. The connection assembly (3) according to claim 9, wherein The first bearing surface (18) is formed by a flange (121) extending inwardly around a socket hole (123) of the socket (115), and the second connecting part (15) further includes a track (125) to allow the corresponding ball end (113) to be inserted into the socket (115).

11. The connection assembly (3) according to claim 1 or 2, wherein: The elastic spring plate (22) comprises spring steel.

12. The connection assembly (3) according to claim 1 or 2, wherein: The rake member (5) is substantially rigid.

13. The connection assembly (3) according to claim 1 or 2, wherein: At least one of the elastic spring plates (22) includes a plurality of elastic spring plates (222), wherein a combination of the plurality of elastic spring plates (222) and the rake component (5) are clamped between the first clamping portion (21) and the second clamping portion (27).

14. The connection assembly (3) according to claim 13, wherein The plurality of elastic spring plates (222) include: - a first spring plate (224); and - at least one second spring plate (226).

15. The connection assembly (3) according to claim 14, wherein The first spring plate (224) and the second spring plate (226) are configured to have different respective spring constants.

16. The connection assembly (3) according to claim 14, wherein The first spring plate (224) and the second spring plate (226) are circular plates configured to have different respective diameters.

17. The connection assembly (3) according to claim 14, wherein The first spring plate (224) and the second spring plate (226) are configured to have different respective thicknesses.

18. The connection assembly (3) according to claim 13, wherein The plurality of elastic spring plates (222) include at least two substantially identical spring plates.

19. The connection assembly (3) according to claim 13, wherein The plurality of elastic spring plates (222) further includes one or more subsequent spring plates.

20. An agricultural ground engaging chain comprising a plurality of connecting assemblies according to claim 1 or 2.

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