Nut retaining assembly of harrow string assembly and heavy harrow
By designing the nut stop-retard assembly of the rake string assembly, the different thread guide design of the limit connection and the stop-retard nut are used to prevent the locking nut from loosening, the gap problem caused by the loosening of the nut in the prior art is solved, and the service life and working efficiency of the heavy rake are improved.
Patent Information
- Application Number
- CN202422614360.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-10-28
AI Technical Summary
In the prior art, manual or simple mechanical locking of the rake string assembly cannot achieve the predetermined preload force, resulting in loosening of the nut, resulting in a gap between the rake sheet and the spacer member, affecting the use of the heavy rake.
A nut stop-retard assembly of a string assembly is designed, including a locking nut, a limiting connector and a stop-retard nut. By setting up locking nuts and stop-retard nuts with different thread guides to prevent loosening. The specific structure includes the coordination of the limiting plate, end plate and connecting plate, synchronous rotation and thread angle limitations are achieved.
It effectively prevents loosening of the locking nut and the stop-ret nut, improves the service life of the product, reduces the gap between the rake blade and the spacer member, reduces the failure rate, and improves the working efficiency.
Smart Images
Figure CN223152517U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of agricultural machinery, in particular to a nut anti-loosening component of a harrow string assembly and a heavy harrow. Background Art
[0002] In the field of heavy harrows including opposed harrows and offset harrows, the harrow string is one of the key component assemblies of the heavy harrow, and its assembly quality directly affects the service life of the product.
[0003] In the prior art, the harrow string includes a main shaft, harrow discs sleeved on the main shaft, and spacer members. The spacer members are located between two harrow discs. A locking nut is threadedly connected to the end of the main shaft, and the main shaft, the harrow discs and the spacer members are locked together by the locking nut.
[0004] The applicant of the present invention has found that the prior art has at least the following technical problems: the locking nut and the main shaft cannot achieve a predetermined pre-tightening force only by manual or simple mechanical locking. During use, the nut loosens, resulting in gaps between the harrow discs and the spacer members, affecting the use of the heavy harrow. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a nut anti-loosening component of a harrow string assembly and a heavy harrow to solve the technical problem in the prior art that the nut of the harrow string assembly loosens, resulting in gaps between the harrow discs and the spacer members, affecting the use of the heavy harrow. The preferred technical solutions provided by the utility model and the many technical effects that can be produced are described in detail below.
[0006] To achieve the above purpose, the utility model provides the following technical solutions:
[0007] The nut anti-loosening component of the harrow string assembly provided by the utility model includes a locking nut, a limit connecting member and an anti-loosening nut, wherein:
[0008] The locking nut is threadedly connected to the end of the main shaft of the harrow string. An internal threaded hole is provided at the end of the main shaft. The anti-loosening nut is threadedly connected to the internal threaded hole. The limit connecting member is located outside the locking nut. The limit connecting member rotates synchronously with the locking nut and is connected to the anti-loosening nut. The thread lead of the anti-loosening nut is different from the thread lead of the locking nut.
[0009] Preferably, the limit connecting member includes a limit plate and an end plate fixedly connected, wherein:
[0010] The radial cross-section of the locking nut is polygonal. An adaptation hole matching the outer contour of the locking nut is provided on the limit plate. The locking nut passes through the adaptation hole;
[0011] The end plate abuts against the end of the main shaft. A central hole is provided on the end plate, and the anti-loosening nut passes through the central hole and is threadedly connected to the internal thread hole.
[0012] Preferably, the limiting connecting member further includes a connecting plate, and two ends of the connecting plate are fixedly connected to the limiting plate and the end plate respectively.
[0013] Preferably, the number of the connecting plates is more than two, the connecting plates are arranged at intervals along the axial direction of the locking nut, and the connecting plates abut against different sides of the locking nut respectively.
[0014] Preferably, the radial cross-section of the anti-loosening nut is polygonal.
[0015] Preferably, the nut anti-loosening assembly further includes a gasket, and the gasket is clamped between the limiting connecting member and the anti-loosening nut.
[0016] Preferably, an opening is provided on the gasket, and the opening communicates the inner hole and the outer wall of the gasket.
[0017] Preferably, the nut anti-loosening assembly further includes a clip, the clip is sleeved outside the main shaft and is located between the rake blades of the target string and the locking nut, and the clip abuts against the limiting connecting member.
[0018] The present invention also provides a heavy harrow, which includes a main shaft and the nut anti-loosening assembly of the above-mentioned target string assembly.
[0019] Compared with the prior art, the nut anti-loosening assembly of the target string assembly and the heavy harrow provided by the present invention have the following beneficial effects: Among the locking nut and the anti-loosening nut, when one of them shows a sign of loosening, there will be a tendency to drive the other one to loosen. However, since the thread lead of the anti-loosening nut is different from the thread lead of the locking nut, the nut about to loosen will be restricted by the rotation angle of the other nut, so as to achieve mutual restriction between the locking nut and the anti-loosening nut, and achieve the purpose of preventing loosening. The service life of the product is greatly improved, the gap between the rake blades and the spacer members is eliminated, and the service life is improved. The failure rate of the target string assembly is also greatly reduced, and the operation efficiency is improved. Description of the Drawings
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0021] Figure 1It is a schematic diagram of the mating structure between the target string assembly and the nut anti-return assembly;
[0022] Figure 2 It is Figure 1 The partial enlarged view of part A in
[0023] Figure 3 It is a sectional view of the mating structure between the target string assembly and the nut anti-return assembly;
[0024] Figure 4 It is Figure 3 The partial enlarged view of part B in
[0025] Figure 5 It is a schematic diagram of the structure of the gasket.
[0026] In the figure, 100 is the main shaft; 101 is the internal thread hole; 200 is the harrow blade; 300 is the spacer member; 1 is the lock nut; 2 is the limit connecting piece; 21 is the limit plate; 22 is the end plate; 221 is the central hole; 23 is the connecting plate; 3 is the anti-return nut; 4 is the gasket; 41 is the opening; 5 is the clip. Detailed implementation manners
[0027] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other implementation manners obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope protected by the present utility model.
[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0029] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0030] The embodiment of the present utility model provides a nut anti-loosening assembly for a harrow string assembly, in which the locking nut and the anti-loosening nut restrict each other to achieve the purpose of preventing loosening.
[0031] The following will Figures 1-4 elaborate on the technical solution provided by the present utility model in more detail.
[0032] Embodiment 1:
[0033] Refer to Figures 1-4 As shown, the nut anti-loosening assembly of the harrow string assembly provided by the present utility model includes a locking nut 1, a limit connecting member 2, and an anti-loosening nut 3, wherein: the locking nut 1 is threadedly connected to the end of the main shaft 100 of the harrow string, an internal threaded hole 101 is provided at the end of the main shaft 100, the anti-loosening nut 3 is threadedly connected to the internal threaded hole 101, the limit connecting member 2 is located outside the locking nut 1, the limit connecting member 2 rotates synchronously with the locking nut 1 and is connected to the anti-loosening nut 3, and the thread lead on the anti-loosening nut 3 is different from the thread lead on the locking nut 1.
[0034] In the nut anti-loosening assembly of the harrow string assembly of this embodiment, when one of the locking nut 1 or the anti-loosening nut 3 shows signs of loosening, there will be a tendency to drive the other to loosen. However, since the thread lead on the anti-loosening nut 3 is different from the thread lead on the locking nut 1, that is, the helix angle of the thread on the anti-loosening nut 3 is different from the helix angle of the thread on the locking nut 1, the nut about to loosen will be restricted by the rotation angle of the other nut, so as to achieve the mutual restriction of the locking nut 1 and the anti-loosening nut 3 and achieve the purpose of preventing loosening. The service life of the product is greatly improved, the gap between the harrow blades 200 and the spacer members 300 is eliminated, and the service life is improved. The failure rate of the harrow string assembly is also greatly reduced, and the operation efficiency is improved.
[0035] As an optional implementation manner, refer to Figure 2As shown, the limiting connector 2 includes a limiting plate 21 and an end plate 22 that are fixedly connected, wherein the radial cross-section of the locking nut 1 is a polygon, and the limiting plate 21 is provided with an adapter hole that matches the outer contour of the locking nut 1, and the locking nut 1 passes through the adapter hole; the end plate 22 abuts against the end of the main shaft 100, and a center hole 221 is provided on the end plate 22, and the retaining nut 3 passes through the center hole 221 and is threadedly connected with the internal threaded hole 101.
[0036] The locking nut 1 rotates synchronously with the limit plate 21. Since the end plate 22 is clamped between the end of the main shaft 100 and the backstop nut 3, when the locking nut 1 shows signs of loosening, the backstop nut 3 will tend to loosen through the limit plate 21 and the end. However, since the thread lead on the backstop nut 3 is different from the thread lead on the locking nut 1, the nut that is about to loosen will be limited by the rotation angle of the other nut, thereby achieving mutual restriction between the locking nut 1 and the backstop nut 3 to prevent loosening.
[0037] As an alternative embodiment, see Figure 2 As shown, the limiting connector 2 further includes a connecting plate 23, and the two ends of the connecting plate 23 are respectively fixedly connected to the limiting plate 21 and the end plate 22. Specifically, the number of the connecting plates 23 is more than two, see Figure 2 As shown, the present embodiment includes three connecting plates 23 , which are arranged at intervals around the axial direction of the locking nut 1 , and the connecting plates 23 abut against different side surfaces of the locking nut 1 , respectively.
[0038] When the locking nut 1 rotates due to loosening, the locking nut 1 and the limiting connector 2 rotate synchronously by cooperating with the limiting plate 21 and the connecting plate 23, thereby driving the stop nut 3 to rotate.
[0039] As an alternative embodiment, see Figure 2 As shown, the radial cross section of the stop nut 3 is a polygon, which is convenient for screwing and installation.
[0040] As an alternative embodiment, see Figure 2 , Figure 4 and Figure 5 As shown, the nut backstop assembly further includes a gasket 4, which is clamped between the position limiting connector 2 and the backstop nut 3. An opening 41 is provided on the gasket 4, and the opening 41 communicates with the inner hole and the outer wall of the gasket 4.
[0041] The gasket 4 plays a buffering role, so that the stop nut 3 is locked as much as possible, and the gap between the rake blade 200 and the spacing member 300 is reduced as much as possible. The opening on the gasket 4 allows the gasket 4 to be opened or closed, which is convenient for the installation of the gasket 4.
[0042] As an alternative embodiment, see Figure 1 andFigure 2 As shown, the nut anti-loosening assembly further includes a clip 5. The clip 5 is sleeved outside the main shaft 100 and is located between the rake blades 200 of the target string and the locking nut 1. The clip 5 abuts against the limit connecting member 2.
[0043] The clip 5 is clamped between the rake blade 200 and the locking nut 1, so that the anti-loosening nut 3 is tightened as much as possible, and the gap between the rake blade 200 and the spacer member 300 is reduced as much as possible.
[0044] When installing the nut anti-loosening assembly of the rake string assembly in this embodiment, first install the clip 5, thread the locking nut 1 onto the end of the main shaft 100, cover the limit connecting member 2 outside the locking nut 1 and cooperate with the locking nut 1 in place, so that the anti-loosening nut 3 passes through the central hole 221 of the end plate 22 of the limit connecting member 2 and is threadedly connected to the internal thread hole 101 at the end of the main shaft 100, and the effect of preventing the locking nut 1 and the anti-loosening nut 3 from loosening can be achieved.
[0045] Embodiment 2:
[0046] This embodiment provides a heavy rake, which includes a main shaft 100 and the nut anti-loosening assembly of the above-mentioned rake string assembly. The service life of the product is greatly improved, the gap between the rake blade 200 and the spacer member 300 is eliminated, and the service life is improved. The failure rate of the rake string assembly is also greatly reduced, and the operation efficiency is improved.
[0047] In the description of this specification, specific features, structures or characteristics may be combined in a suitable manner in any one or more embodiments or examples.
[0048] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0049] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, and all should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims
1. A nut anti-loosening component of a harrow string assembly, characterized in that, It includes a lock nut, a limit connecting piece and an anti-back-off nut, wherein: The lock nut is threadedly connected to the end of the main shaft of the target string. An internal thread hole is provided at the end of the main shaft. The anti-back-off nut is threadedly connected to the internal thread hole. The limit connecting piece is located outside the lock nut. The limit connecting piece rotates synchronously with the lock nut and is connected to the anti-back-off nut. The thread lead of the anti-back-off nut is different from that of the lock nut.
2. The nut anti-backoff assembly of the rake string assembly according to claim 1, characterized in that, The limit connecting piece includes a limit plate and an end plate which are fixedly connected, wherein: The radial cross-section of the lock nut is polygonal. An adaptation hole matching the outer contour of the lock nut is provided on the limit plate. The lock nut passes through the adaptation hole. The end plate abuts against the end of the main shaft. A central hole is provided on the end plate. The anti-back-off nut passes through the central hole and is threadedly connected to the internal thread hole.
3. The nut anti-loosening component of the rake string assembly according to claim 2, wherein, The limit connecting piece further includes a connecting plate. The two ends of the connecting plate are respectively fixedly connected to the limit plate and the end plate.
4. The nut anti-back-off assembly of the rake string assembly according to claim 3, characterized in that, The number of the connecting plates is more than two. The connecting plates are arranged at intervals along the axis direction of the lock nut. The connecting plates respectively abut against different sides of the lock nut.
5. The nut anti-loosening assembly of the rake string assembly according to claim 1, characterized in that, The radial cross-section of the anti-back-off nut is polygonal.
6. The nut anti-back-off assembly of the rake string assembly according to claim 2, wherein, The nut anti-back-off assembly further includes a gasket. The gasket is clamped between the limit connecting piece and the anti-back-off nut.
7. The nut anti-loosening assembly of the rake string assembly according to claim 6, characterized in that, An opening part is provided on the gasket. The opening part communicates the inner hole and the outer wall of the gasket.
8. The nut anti-back-off assembly of the rake string assembly according to claim 1, wherein, The nut anti-back-off assembly further includes a clip. The clip is sleeved outside the main shaft and is located between the rake blade of the target string and the lock nut. The clip abuts against the limit connecting piece.
9. A heavy harrow, characterized in that, It includes a main shaft and the nut anti-back-off assembly of the rake string assembly according to any one of claims 1-8.