Handle assembly structure of a farm plough
By introducing a locking mechanism consisting of a conical pressure plate and a clamping ring into the handle of the agricultural tiller, the problem of loosening of the gear meshing structure under vibration is solved, resulting in a more stable handle connection and improving the safety and reliability of the agricultural tiller.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING GUANZHONG MACHINERY CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-06-23
AI Technical Summary
The toothed disc engagement structure of the handlebars of agricultural tillers is prone to loosening under vibration, leading to angle deviation or detachment, which poses a safety hazard.
The locking mechanism employs a conical pressing plate and a conical clamping ring. The driving component drives the conical clamping ring to slide, causing the conical pressing plate to elastically deform and press against the side wall of the threaded column. Combined with the locking element and spring locking, the assembly stability is enhanced.
It effectively prevents the nuts from loosening, improves the assembly stability of the agricultural machinery handle, reduces the probability of accidental unlocking, and enhances safety.
Smart Images
Figure CN224386165U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of agricultural machinery, and in particular to the assembly structure of agricultural machinery handles. Background Technology
[0002] A tiller is a small agricultural machine used for cultivating farmland, typically consisting of a power unit, transmission mechanism, and operating components. Its handle, as the main operating component, directly affects the user's operating experience and work efficiency.
[0003] Currently, most agricultural machinery handles are assembled using a toothed disc meshing structure: a matching toothed disc is installed at the connection between the machine body and the handle, and the two are locked together by tightening a nut. By adjusting the meshing position of the toothed disc at different horizontal angles, the angle between the handle and the machine body can be flexibly adjusted.
[0004] However, due to the intense vibrations during operation, long-term use can easily cause the nuts to loosen or even fall off, resulting in failure of the gear meshing, which in turn can cause the handle angle to shift or fall off, posing a safety hazard. Utility Model Content
[0005] To suppress vibration that could cause nuts to loosen and improve assembly stability, this application provides an assembly structure for a tiller handle.
[0006] The agricultural tiller handle assembly structure provided in this application adopts the following technical solution:
[0007] A tiller handle assembly structure includes a main body, an operating handle, a geared disc, a threaded post, and a nut. The geared disc is mounted on the main body and meshes with the end face of the operating handle. The threaded post is mounted on the main body and passes through the end face of the operating handle. The nut is threaded onto the threaded post and abuts against the side of the operating handle away from the main body. The nut is characterized by having an extension tube, within which is a locking mechanism for locking the threaded post passing through the nut. The locking mechanism includes:
[0008] Conical pressure plates, multiple sets of which are circumferentially arranged on the nut, are capable of elastic deformation;
[0009] A tapered clamping ring is slidably disposed inside an extension tube. When the tapered clamping ring slides toward the nut, it pushes multiple sets of tapered pressing plates to deform and press against the side wall of the threaded column.
[0010] A drive assembly is disposed on an extension tube and is used to drive the tapered retaining ring to slide, wherein the tapered retaining plate prevents rotation between the nut and the threaded column when it abuts against the side wall of the threaded column.
[0011] By adopting the above technical solution, after the operating handle and the toothed disc on the main body are engaged, the nut is threadedly connected to the threaded column, and then the nut is rotated. When the nut presses the operating handle against the main body, the drive assembly drives the conical clamping ring to slide closer to the nut. As the conical clamping ring slides, it pushes multiple sets of conical pressure plates to deform, and the pressure plates are pressed against the side wall of the threaded column by the elastic pads. The conical clamping ring pushes the conical pressure plates to deform, suppressing vibration that causes the nut to loosen, and improving assembly stability.
[0012] Furthermore, the driving component includes:
[0013] A gripping rod is fixedly mounted on a tapered abutment ring and passes through the side wall of an extension tube. A sliding groove is provided on the side wall of the extension tube to facilitate the sliding of the gripping rod.
[0014] A locking element is disposed on the tapered abutment ring and is used to lock the tapered abutment ring onto the extension tube.
[0015] By adopting the above technical solution, the user pushes the gripping rod to slide in the sliding groove, thereby pushing the conical clamping ring to slide in the extension tube. After the conical clamping ring is pushed to the designated position, the locking member locks the conical clamping ring, thereby ensuring that the conical clamping ring clamps and locks multiple sets of conical pressing plates against the side wall of the threaded column, which facilitates locking and unlocking of the assembly structure.
[0016] Furthermore, the locking element includes:
[0017] A locking block, which is slidably disposed on the side wall of the tapered abutment ring along the direction of approaching or away from the axis of the tapered abutment ring;
[0018] A locking spring is provided inside the conical abutment ring and is used to push the locking block to slide away from the axis of the conical abutment ring. A locking groove is provided on the side wall of the extension tube to engage with the locking block. After the conical abutment ring moves to the designated position, the locking spring pushes the locking block to slide into the locking groove.
[0019] By adopting the above technical solution, the locking spring pushes the locking block to engage with the locking groove, so that the conical clamping ring automatically locks after sliding to the designated position. At the same time, the locking spring continuously presses the locking block to ensure that the locking block always fits tightly with the locking groove, reducing the probability of accidental unlocking.
[0020] Furthermore, a retaining plate is provided on the side of the tapered pressing plate away from the nut, and an elastic washer is provided on the side of the retaining plate near the threaded post.
[0021] By adopting the above technical solution, the elastic gasket set on the clamping plate increases the contact friction between the gasket and the threaded post, thereby enhancing the locking effect.
[0022] Furthermore, the conical clamping ring includes:
[0023] A sliding part is slidably disposed within an extension tube, and a driving assembly is disposed on the sliding part;
[0024] A tapered abutment portion, wherein the tapered abutment portion is slidably disposed on a sliding portion;
[0025] A preload spring is disposed within the sliding portion and is used to push the tapered clamping portion to slide closer to the nut;
[0026] A limiting ring is disposed on the sliding part and is used to limit the maximum distance between the conical pressing part and the sliding part.
[0027] By adopting the above technical solution, the limiting ring can easily limit the maximum displacement value of the conical pressing part and the sliding part, thereby facilitating the sliding part to slide along with the conical pressing part. At the same time, the pre-compression spring pushes the conical pressing part to continuously press the conical pressing plate, maintaining a stable locking force even under vibration or thermal expansion and contraction conditions, thereby improving the pressing effect of the conical pressing part on the conical pressing plate.
[0028] Furthermore, the extension tube is detachably provided with a protective cover for protecting the locking block in the locking groove, the protective cover being used to prevent the locking block from sliding.
[0029] By adopting the above technical solution, the protective cover is used to prevent debris from entering the locking groove. At the same time, the locking block can only be pushed to slide and release the locking of the conical clamping ring after the protective cover is removed, reducing the probability of accidental unlocking due to accidental contact.
[0030] Furthermore, the extension tube is provided with a rotating handle, which is inclinedly mounted on the extension tube and used to drive the extension tube to rotate.
[0031] By adopting the above technical solution, the rotating handle provides a lever effect, allowing users to easily rotate the extension tube to adjust the locking mechanism status.
[0032] Furthermore, the rotating handle is covered with a soft, non-slip layer, and the soft, non-slip layer has a wavy texture.
[0033] By adopting the above technical solution, the wavy texture is combined with the soft anti-slip layer to enhance grip friction and prevent slipping when hands are wet.
[0034] In summary, this application includes at least one of the following beneficial technical effects:
[0035] 1. By engaging the operating handle with the gear plate on the main body, the nut is threaded onto the threaded column. Then, by rotating the handle, the nut is rotated. When the nut presses the operating handle against the main body, the user uses the grip rod to move the conical retaining ring closer to the nut. As the conical retaining ring slides, it causes multiple sets of conical pressure plates to deform, and the pressure plates are pressed against the side wall of the threaded column by the elastic washer. When the conical retaining ring moves to the designated position, the locking spring pushes the locking block to engage in the locking groove, thereby locking the position of the conical retaining ring. The conical retaining ring pushes the conical pressure plates to deform, suppressing vibration that could cause the nut to loosen, thus improving assembly stability.
[0036] 2. When the locking block is snapped into the locking groove, the preload spring always provides pressure to the tapered clamping part to slide towards the nut, thereby improving the clamping effect of the tapered clamping part on the tapered pressing plate. Attached Figure Description
[0037] Figure 1 This is a schematic diagram of the structure of the handle device of the agricultural tiller according to Embodiment 1 of this application. The protective cover is not shown in the figure.
[0038] Figure 2 yes Figure 1 Enlarged diagram of section A in the middle;
[0039] Figure 3 This is a half-sectional structural schematic diagram of the handle device structure of Embodiment 1 of this application;
[0040] Figure 4 yes Figure 3 Enlarged diagram of section B in the middle;
[0041] Figure 5 This is a schematic diagram of the handle device structure according to Embodiment 2 of this application;
[0042] Figure 6 This is a half-sectional structural diagram of the handle device structure of Embodiment 2 of this application;
[0043] Figure 7 yes Figure 6 Enlarged schematic diagram of section C.
[0044] Reference numerals: 1. Main body; 11. Operating handle; 12. Gear disc; 13. Threaded post; 14. Nut; 2. Extension tube; 21. Sliding groove; 3. Locking mechanism; 31. Conical pressing plate; 311. Pressing plate; 312. Elastic washer; 32. Conical pressing ring; 321. Sliding part; 322. Conical pressing part; 323. Preload spring; 324. Limiting ring; 4. Drive assembly; 41. Grip rod; 5. Locking element; 51. Locking block; 52. Locking spring; 6. Rotating handle; 61. Soft anti-slip layer. Detailed Implementation
[0045] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.
[0046] This application discloses the assembly structure of a handle for a farming machine.
[0047] Example 1
[0048] Reference Figure 1 and Figure 2 The agricultural tiller handle assembly structure includes a main body 1, an operating handle 11, a gear 12, a threaded post 13, and a nut 14. The gear 12 is mounted on the main body 1 and meshes with the end face of the operating handle 11. The threaded post 13 is mounted on the main body 1 and passes through the end face of the operating handle 11. The nut 14 is threaded onto the threaded post 13 and abuts against the side of the operating handle 11 away from the main body 1. An extension tube 2 is provided on the nut 14, and a locking mechanism 3 is provided inside the extension tube 2 for locking the threaded post 13 that passes through the nut 14.
[0049] Reference Figure 3 and 4 The extension tube 2 is fixedly connected to the outer wall of the nut 14. The extension tube 2 is hollow inside. The locking mechanism 3 includes a conical pressing plate 31, a conical clamping ring 32, and a drive assembly 4. Multiple sets of conical pressing plates 31 are arranged in a circumferential array around the axis of the nut 14 on the end face of the nut 14. There is a certain gap between adjacent conical pressing plates 31. The multiple sets of conical pressing plates 31 are located on the end of the nut 14 away from the operating handle 11. The conical pressing plates 31 can undergo elastic deformation. A clamping plate 311 is provided on the side of the conical pressing plate 31 away from the nut 14. An elastic washer 312 is fixedly installed on the side of the clamping plate 311 near the threaded post 13. The conical clamping ring 32 is along the axis of the extension tube 2. The tapered retaining ring 32 is installed in the extension tube 2 and slides in the direction of the threaded post 13. A through hole is opened in the middle of the tapered retaining ring 32 for the threaded post 13 to pass through. A tapered surface is opened on the side of the tapered retaining ring 32 near the nut 14. When the tapered retaining ring 32 slides towards the nut 14, the tapered retaining ring 32 pushes multiple sets of tapered pressing plates 31 through the tapered surface, thereby pushing the multiple sets of tapered pressing plates 31 to bend and deform in the direction of the threaded post 13 axis. Finally, the elastic pads 312 on the retaining plates 311 are pressed against the threaded post 13. As the tapered retaining ring 32 continues to slide towards the nut 14, the pressing effect between the elastic pads 312 and the threaded post 13 is improved, thereby preventing relative rotation between the nut 14 and the threaded post 13.
[0050] Reference Figure 2 and Figure 4The drive assembly 4 is mounted on the extension tube 2. The drive assembly 4 is used to drive the conical clamping ring 32 to slide. The drive assembly 4 includes a gripping rod 41 and a locking member 5. The gripping rod 41 is fixedly mounted on the outer wall of the conical clamping ring 32 and passes through the side wall of the extension tube 2. The side wall of the extension tube 2 is provided with a sliding groove 21 to facilitate the sliding of the gripping rod 41. The user slides the gripping rod 41 in the sliding groove 21, thereby driving the conical clamping ring 32 to slide in the extension tube 2. The locking member 5 is mounted on the conical clamping ring 32 and is used to lock the conical clamping ring 32 on the extension tube 2. This ensures that the conical clamping ring 32 pushes the conical pressing plate 31 to deform and makes the elastic pad 312 on the pressing plate 311 press against the threaded post 13, reducing the probability of rotation between the nut 14 and the threaded post 13.
[0051] Reference Figure 4 The locking component 5 includes a locking block 51 and a locking spring 52. The locking block 51 is slidably mounted on the side wall of the tapered abutment ring 32 along the direction close to or away from the axis of the tapered abutment ring 32. The locking spring 52 is fixedly mounted inside the tapered abutment ring 32 and is used to push the locking block 51 to slide away from the axis of the tapered abutment ring 32. A locking groove is provided on the side wall of the extension tube 2 to engage with the locking block 51. When the tapered abutment ring 32 moves to the designated position, the locking spring engages. Spring 52 pushes the locking block into the locking groove to lock the position of the conical abutment ring 32. When it is necessary to release the lock on the conical abutment ring 32, the locking block 51 is pushed to compress the locking spring 52. After the locking block 51 slides completely into the conical abutment ring 32, the holding rod 41 drives the conical abutment ring 32 to slide, so that the locking spring 52 pushes the locking block 51 to slide and press against the inner wall of the extension tube 2, thereby releasing the lock on the conical abutment ring 32.
[0052] Reference Figure 4 After the locking block 51 is snapped into the locking groove, the protective cover is installed on the extension tube 2. The protective cover protects the locking block 51 in the locking groove, thereby preventing the locking block 51 from sliding and reducing the probability of accidentally releasing the locking of the conical locking ring 32 due to accidental sliding of the locking block 51. In this embodiment, the protective cover is hinged to the outer wall of the extension tube 2. Under the action of gravity, the protective cover hangs down naturally and protects the locking block 51 in the locking groove.
[0053] Reference Figure 1 A rotating handle 6 is fixedly installed on the extension tube 2. The rotating handle 6 is installed at an angle on the extension tube 2. The rotating handle 6 is installed at an angle to facilitate the rotation of the extension tube 2, thereby realizing the threaded engagement between the drive nut 14 and the threaded post 13. A soft anti-slip layer 61 is installed on the rotating handle 6. The soft anti-slip layer 61 is provided with a wavy pattern. The soft anti-slip layer 61 with wavy pattern makes it easy for the user to rotate the rotating handle 6.
[0054] The working principle of Embodiment 1 of this application is as follows:
[0055] After the operating handle 11 is engaged with the gear plate 12 on the main body 1, the nut 14 is threadedly connected to the threaded post 13. Then, the nut 14 is rotated by turning the handle 6. When the nut 14 presses the operating handle 11 against the main body 1, the user moves the conical clamping ring 32 closer to the nut 14 by holding the rod 41. As the conical clamping ring 32 slides, it pushes multiple sets of conical pressure plates 31 to deform, and the pressure plates 311 are pressed against the side wall of the threaded post 13 by the elastic washer 312. When the conical clamping ring 32 moves to the designated position, the locking spring 52 pushes the locking block 51 to engage in the locking groove, thereby locking the position of the conical clamping ring 32. By pushing the conical pressure plates 31 to deform by the conical clamping ring 32, vibration is suppressed, which causes the nut 14 to loosen, thus improving the assembly stability.
[0056] Example 2
[0057] Reference Figure 5 , Figure 6 and Figure 7 The difference between this embodiment and Embodiment 1 is that the conical clamping ring 32 includes a sliding part 321, a conical clamping part 322, a preload spring 323, and a limiting ring 324. The sliding part 321 is slidably installed inside the extension tube 2, wherein the gripping rod 41 and the locking member 5 are both installed on the sliding part 321; the conical clamping part 322 is slidably installed on the sliding part 321, and a sliding cavity is provided inside the sliding part 321 to facilitate the sliding of part of the conical clamping part 322; the preload spring 323 is fixedly installed in the sliding cavity, and the preload spring 323 is used to push the conical clamping part 322 to slide closer to the nut 14; the limiting ring 324 is fixedly installed on the sliding part 321, and the limiting ring 324 is used to limit the maximum distance between the conical clamping part 322 and the sliding part 321.
[0058] Reference Figure 6 and Figure 7 In the initial position, the preload spring 323 pushes the conical clamping part 322 to slide towards the nut 14 and presses against the limiting ring 324. When the user moves the conical clamping ring 32 towards the nut 14 by holding the rod 41, the interaction between the conical clamping part 322 and the conical pressing plate 31 pushes the conical clamping part 322 to slide towards the sliding part 321, thereby compressing the preload spring 323. After the locking block 51 is engaged in the locking groove, the preload spring 323 always provides pressure to the conical clamping part 322 to slide towards the nut 14, thereby improving the clamping effect of the conical clamping part 322 on the conical pressing plate 31.
[0059] The working principle of Embodiment 2 of this application is as follows:
[0060] When the locking block 51 is snapped into the locking groove, the preload spring 323 always provides pressure to the conical abutment 322 to slide towards the nut 14, thereby improving the abutment effect of the conical abutment 322 on the conical abutment plate 31.
[0061] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. An assembly structure for a tiller handle, comprising a main body (1), an operating handle (11), a gear disc (12), a threaded post (13), and a nut (14), wherein the gear disc (12) is disposed on the main body (1) and meshes with the end face of the operating handle (11), the threaded post (13) is disposed on the main body (1) and passes through the end face of the operating handle (11), and the nut (14) is threaded onto the threaded post (13) and abuts against the side of the operating handle (11) away from the main body (1), characterized in that: An extension tube (2) is provided on the nut (14), and a locking mechanism (3) is provided inside the extension tube (2) for locking the threaded post (13) passing through the nut (14). The locking mechanism (3) includes: Conical pressure plates (31), multiple sets of the conical pressure plates (31) are circumferentially arranged on the nut (14), and the conical pressure plates (31) can undergo elastic deformation; A conical clamping ring (32) is slidably disposed inside the extension tube (2). When the conical clamping ring (32) slides toward the nut (14), it pushes multiple sets of conical pressing plates (31) to deform and press against the side wall of the threaded column (13). The drive assembly (4) is disposed on the extension tube (2) and is used to drive the tapered clamping ring (32) to slide. When the tapered clamping plate (31) abuts against the side wall of the threaded post (13), it prevents the nut (14) from rotating with the threaded post (13).
2. The agricultural machinery handle assembly structure according to claim 1, characterized in that: The driving component (4) includes: The gripping rod (41) is fixedly installed on the conical clamping ring (32) and passes through the side wall of the extension tube (2). The side wall of the extension tube (2) is provided with a sliding groove (21) to facilitate the sliding of the gripping rod (41). Locking element (5), which is disposed on the tapered abutment ring (32) and is used to lock the tapered abutment ring (32) onto the extension tube (2).
3. The agricultural machinery handle assembly structure according to claim 2, characterized in that: The locking element (5) includes: A locking block (51) is slidably disposed on the side wall of the tapered abutment ring (32) along the direction of proximity to or away from the axis of the tapered abutment ring (32); A locking spring (52) is provided inside a conical abutment ring (32) and is used to push a locking block (51) to slide away from the axis of the conical abutment ring (32). A locking groove is provided on the side wall of the extension tube (2) to engage with the locking block (51). After the conical abutment ring (32) moves to the designated position, the locking spring (52) pushes the locking block to slide into the locking groove.
4. The agricultural tiller handle assembly structure according to claim 1, characterized in that: The tapered pressing plate (31) is provided with a clamping plate (311) on the side away from the nut (14), and an elastic washer (312) is provided on the side of the clamping plate (311) near the threaded post (13).
5. The agricultural machinery handle assembly structure according to claim 2, characterized in that: The conical abutment ring (32) includes: The sliding part (321) is slidably disposed inside the extension tube (2), and the driving assembly (4) is disposed on the sliding part (321); A conical abutment (322) is slidably disposed on a sliding portion (321); A preload spring (323) is provided in the sliding part (321) and is used to push the conical clamping part (322) to slide closer to the nut (14); A limiting ring (324) is disposed on the sliding part (321) and is used to limit the maximum distance between the conical abutment part (322) and the sliding part (321).
6. The agricultural machinery handle assembly structure according to claim 5, characterized in that: The extension tube (2) is detachably provided with a protective cover for protecting the locking block (51) in the locking groove. The protective cover is used to prevent the locking block (51) from sliding.
7. The agricultural tiller handle assembly structure according to claim 1, characterized in that: The extension tube (2) is provided with a rotating handle (6), which is inclinedly arranged on the extension tube (2) and used to drive the extension tube (2) to rotate.
8. The agricultural tiller handle assembly structure according to claim 7, characterized in that: The rotating handle (6) is covered with a soft anti-slip layer (61), and the soft anti-slip layer (61) is provided with a wavy pattern.