Three-point quick change device of tractor

Abstract

The utility model discloses a three-point quick change device of a tractor, and belongs to the technical field of agricultural machinery. A three-point quick-changing device of a tractor comprises an n-shaped suspension frame, a lower suspension hook and an upper suspension hook are arranged on the suspension frame and distributed in a triangular shape, the lower suspension hook comprises a hook body and a lock plate, a hook groove with an upward opening is formed in the hook body, and the lock plate is arranged in the hook groove. A lock plate used for blocking the opening is arranged on the inclined upper portion of the hook groove in a swinging mode, and the lock plate is of a big-end-down fan-shaped structure. The automatic locking device has the advantages that automatic locking is achieved, and pulling and docking between the tractor and the agricultural machinery can be completed by a single person.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, in particular to a three-point quick-change device for tractors. Background Art

[0002] Most of the agricultural machinery connected to tractors is completed by using manpower to connect with pins, which is time-consuming and laborious.

[0003] In the utility model patent document with the publication number of CN204669834U, a quick suspension adapted to the quick connection of a tractor is disclosed. The quick suspension adapted to the quick connection of a tractor in this utility model includes an inverted "U"-shaped bracket. On the side surface of the bracket, an upper suspension hook and two hook bodies arranged in a triangular pattern are fixedly connected. The upper suspension hook is installed on the top plate of the bracket through a mounting seat, and the two hook bodies are respectively fixed on the two side plates of the bracket; A locking device capable of closing the opening of the hook body is connected to each of the two hook bodies. This utility model has a simple structure, is convenient to operate, realizes quick suspension, has a stable suspension, accurate positioning, and saves time and effort.

[0004] However, for this three-point suspension device, a manual operation handle still needs to be used to drive the lock plate to rotate and cooperate with the hook body to complete locking. However, during the process of hanging and connecting agricultural machinery, the tractor driver needs to operate in the cab, so the manual operation handle requires the cooperation of another person to carry out and cannot complete the automatic locking work. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problem that the three-point suspension device used by tractors cannot complete the automatic locking work, and a three-point quick-change device for tractors is proposed.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The three-point quick-change device for tractors includes a "U"-shaped suspension frame. A lower suspension hook and an upper suspension hook are arranged on the suspension frame. The lower suspension hook and the upper suspension hook are distributed in a triangular pattern. The lower suspension hook includes a hook body and a lock plate. An upwardly opening hook groove is arranged on the hook body, and a lock plate for blocking the opening is swingably arranged obliquely above the hook groove. The lock plate is a fan-shaped structure with a smaller upper part and a larger lower part.

[0008] Further, a hook handle is arranged on one side of the hook groove, a pin shaft is arranged at the top of the lock plate, and the lock plate is swingably installed on the upper part of the hook handle through the pin shaft.

[0009] Further, the suspension frame includes a cross beam and vertical beams. An upwardly opening upper suspension hook is arranged in the middle of the top of the cross beam, and the hook handle is fixedly installed on the front end face of the vertical beam.

[0010] Furthermore, a storage groove corresponding to the locking plate is provided in front of the vertical beam, so that the locking plate can be stored in the storage groove when it swings.

[0011] Furthermore, a limiting groove is formed on the locking plate along the swing direction, and a limiting block corresponding to the limiting groove is provided inside the receiving groove, so that when the end of the locking plate away from the vertical beam swings, it will not exceed the end of the hook groove away from the vertical beam.

[0012] Furthermore, a torsion spring is provided on the surface of the pin, and the two ends of the torsion spring are respectively connected to the locking plate and the hook handle, so that the locking plate rotates away from the vertical beam.

[0013] Furthermore, the locking plate is fixedly connected to the pin, and one end of the pin is detachably provided with a handle. The locking plate is rotated by the handle to a position where the suspension pin can be moved out of the hook groove.

[0014] Furthermore, there are multiple hooks and locking plates, which are staggered along the axial direction of the pin.

[0015] Compared with the prior art, this utility model provides a three-point quick-change device for tractors, which has the following beneficial effects:

[0016] This utility model relates to a three-point quick-change device for tractors. In use, the device is installed on the tractor's trailer hitch. The trailer hitch moves the device, ensuring both the upper and lower hooks are positioned below the suspension pins of the agricultural machinery to be towed. The device then moves upwards, during which the suspension pins push the locking plate downwards, causing the locking plate to swing to a position that does not interfere with the suspension pins entering the hook groove. Once the suspension pins are in the hook groove, the locking plate automatically swings back to its initial position, blocking the upward movement of the suspension pins from the top. This prevents the suspension pins of the agricultural machinery from automatically disengaging from the hook groove, completing the automatic locking process and reducing the need for manual intervention.

[0017] Other advantages, objectives and features of this invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be taught from practice of this invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model from the right front view.

[0019] Figure 2 This is a three-dimensional schematic diagram of the locking plate structure of this utility model;

[0020] Figure 3 This is a side view of the locking plate structure of this utility model;

[0021] Figure 4 Schematic diagram of the storage groove structure of the present utility model;

[0022] Figure 5 Schematic diagram of the left front view of the overall structure of the present utility model;

[0023] Figure 6 of the present utility model Figure 5 Schematic diagram of the enlarged effect of the structure of part A in the present utility model.

[0024] In the figure:

[0025] 1. Suspension frame; 101. Cross beam; 102. Vertical beam; 2. Lower suspension hook; 201. Hook body; 202. Lock plate; 203. Pin shaft; 204. Handle; 205. Storage groove; 206. Limiting groove; 207. Torsion spring groove; 208. Limiting block; 209. Hook groove; 210. Hook handle; 211. Insertion slot; 3. Upper suspension hook; 4. Suspension pin. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0027] Refer to Figure 1-6 , the three-point quick-change device of the tractor of the present utility model includes a "冂"-shaped suspension frame 1, the suspension frame 1 includes a cross beam 101 and a vertical beam 102, the bottom ends of the cross beam 101 are connected with the vertical beam 102, the cross beam 101 and the vertical beam 102 are fixedly connected, and the middle of the top of the cross beam 101 is provided with an upper suspension hook 3 with an upward opening.

[0028] The bottom of the front end face of the vertical beam 102 is fixedly connected with a lower suspension hook 2, and the lower suspension hook 2 and the upper suspension hook 3 are distributed in a triangle. Specifically, the two lower suspension hooks 2 are located in front of the bottoms of the two vertical beams 102, and one upper suspension hook 3 is located in the middle of the top of the cross beam 101, forming a triangular distribution and constituting a three-point quick-change structure.

[0029] The lower suspension hook 2 includes a hook body 201 and a lock plate 202. The hook body 201 is processed with a hook groove 209 with an upward opening. When the hook body 201 is suspended, it hooks the suspension pin 4 of the agricultural implement to be mounted through the hook groove 209.

[0030] A locking plate 202 is mounted diagonally above the hook groove 209 to block the opening. The locking plate 202 has a fan-shaped structure that is smaller at the top and larger at the bottom. This fan-shaped structure allows the locking plate 202 to move from bottom to top towards the suspension pin 4 under the action of the suspension bracket 1. The suspension pin 4 can then press the locking plate 202 away from the suspension pin 4 by squeezing the straight edge of the locking plate 202, so that the suspension pin 4 can smoothly enter the hook groove 209.

[0031] After the suspension pin 4 enters the bottom of the hook groove 209, the locking plate 202 automatically swings back to its initial position under the action of gravity, and the bottom arc-shaped edge of the locking plate 202 is exactly located at the top of the suspension pin 4, as shown. Figure 3 As shown.

[0032] A hook handle 210 is integrally formed on one side of the hook groove 209. A pin 203 is inserted through the top of the locking plate 202. The locking plate 202 is swayably mounted on the upper part of the hook handle 210 through the pin 203, so that the axis of the pin 203 is on the outside of the hook groove 209, preventing the pin 203 and the locking plate 202 from blocking the hanging pin 4 from entering the interior of the hook groove 209 from above in the vertical direction.

[0033] The hook 210 is fixedly installed on the front end face of the vertical beam 102. The upper hook 3 and the lower hook 2 both open upwards and are located in front of the suspension frame 1, forming a three-point distribution.

[0034] The front of the vertical beam 102 is machined with a storage groove 205 corresponding to the locking plate 202. When the locking plate 202 swings under the pushing action of the suspension pin 4, the end of the locking plate 202 near the vertical beam 102 swings to the storage groove 205, and the end of the locking plate 202 is stored in the storage groove 205, so that the locking plate 202 has sufficient swing space.

[0035] A limiting groove 206 is formed on the locking plate 202 along the swing direction. The limiting groove 206 is an arc-shaped groove centered on the pin 203. A limiting block 208 corresponding to the limiting groove 206 is provided inside the receiving groove 205. The limiting block 208 is fixedly installed on the side wall of the receiving groove 205, so that when the end of the locking plate 202 away from the vertical beam 102 swings, it will not exceed the end of the hook groove 209 away from the vertical beam 102. Specifically, as shown... Figure 3 As shown, when the locking plate 202 swings away from the vertical beam 102 to block the suspension pin 4, the limiting block 208 cooperates with the limiting groove 206 to prevent the locking plate 202 from continuing to swing away from the vertical beam 102, preventing the locking plate 202 from swinging too much due to external force during operation and losing its blocking effect on the suspension pin 4, thus preventing the suspension pin from becoming unhooked.

[0036] A torsion spring is mounted on the surface of the pin 203. A torsion spring groove 207 is machined on the side of the hook handle 210. The torsion spring is installed in the torsion spring groove 207. The two ends of the torsion spring are connected to the locking plate 202 and the hook handle 210 respectively. Under the torsion of the torsion spring, the locking plate 202 can rotate to the side away from the vertical beam 102. This prevents the locking plate 202 from automatically swinging into the storage groove 205 and losing its blocking effect on the suspension pin 4 due to vibration during use, and further prevents the suspension pin 4 from automatically disengaging from the hook groove 209.

[0037] The locking plate 202 is fixedly connected to the pin 203. A handle 204 is detachably connected to one end of the pin 203. The handle 204 rotates the locking plate 202 to a position where the suspension pin 4 can be removed from the hook groove 209. Specifically, the handle 204 has an L-shaped structure. The end of the pin 203 has a hexagonal groove 211. The handle 204 is a hexagonal wrench. One end of the handle 204 near the groove 211 has an integrally formed hexagonal prism structure. The handle 204 is inserted into... After inserting the slot 211, the handle 204 swings freely downward under its own weight, which can drive the locking plate 202 to rotate synchronously. When it is necessary to separate the suspension pin 4 from the hook body 201, the handle 204 is inserted into the slot 211 and the handle 204 is in a horizontal state. After releasing the handle, the handle 204 swings downward, causing the locking plate 202 to swing towards the side closer to the storage slot 205. When one end of the locking plate 202 swings into the storage slot 205, the other end no longer obstructs the suspension pin.

[0038] When not performing a disengagement operation, the 204 handle can be stored in the toolbox.

[0039] There are multiple hooks 201 and locking plates 202, which are staggered along the axial direction of the pin 203. In this application, the lower suspension hook 2 is located in front of the vertical beam 102, and the axial direction of the pin 203 is left and right, as shown in the following figure. Figure 1 As shown, multiple hooks 201 and locking plates 202 can increase the contact area between the two and the suspension pin 4, making the connection between the lower suspension hook 2 and the suspension pin 4 more stable.

[0040] Working principle: In use, this device is installed on the trailer structure behind the tractor. The hydraulic system of the trailer structure drives the device to move, adjusting it to be below the suspension pin 4 of the towed agricultural machinery, so that the upper suspension hook 3 and the lower suspension hook 2 are located below the corresponding suspension pin 4. Then, the hydraulic system drives the device to move upward. During the movement, the suspension pin 4 pushes the locking plate 202 from top to bottom, causing one end of the locking plate 202 to swing into the receiving groove 205, while the other end swings to a position that does not affect the suspension pin 4 from entering the hook groove 209. After the suspension pin 4 enters the hook groove 209, the locking plate 202 automatically swings back to its initial position under its own weight and the action of the torsion spring, blocking the suspension pin from moving upward from the top, achieving the effect of automatic locking.

[0041] When it is necessary to disconnect the hook 201 from the suspension pin 4, insert the handle 204 into the insertion slot 211. The handle 204 will open the locking plate 202, and the tractor driver can then return to the cab to operate the tractor's trailer structure, thereby disengaging the trailer structure from the suspension pin 4. One person can complete the above operation, saving manpower.

[0042] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A three-point quick-change device for a tractor, comprising a U-shaped suspension frame (1), wherein a lower suspension hook (2) and an upper suspension hook (3) are provided on the suspension frame (1), the lower suspension hook (2) and the upper suspension hook (3) being arranged in a triangular pattern, characterized in that, The lower hanging hook (2) includes a hook body (201) and a locking plate (202). The hook body (201) is provided with an upward-facing hook groove (209). The locking plate (202) is swayably provided above the hook groove (209) to block the opening. The locking plate (202) has a fan-shaped structure that is smaller at the top and larger at the bottom.

2. The tractor three-point quick-change device according to claim 1, characterized in that, A hook handle (210) is provided on one side of the hook groove (209), and a pin (203) is provided on the top of the locking plate (202). The locking plate (202) is swayably mounted on the upper part of the hook handle (210) via the pin (203).

3. The tractor three-point quick-change device according to claim 2, characterized in that, The suspension frame (1) includes a crossbeam (101) and a vertical beam (102). The top center of the crossbeam (101) is provided with an upward-facing upper hanging hook (3), and the hook handle (210) is fixedly installed on the front end face of the vertical beam (102).

4. The tractor three-point quick-change device according to claim 3, characterized in that, The front of the vertical beam (102) is provided with a storage groove (205) corresponding to the lock plate (202), so that the lock plate (202) can be stored in the storage groove (205) when it swings.

5. The tractor three-point quick-change device according to claim 4, characterized in that, The locking plate (202) has a limiting groove (206) along the swing direction, and the storage groove (205) is provided with a limiting block (208) corresponding to the limiting groove (206) so that when the end of the locking plate (202) away from the vertical beam (102) swings, it will not exceed the end of the hook groove (209) away from the vertical beam (102).

6. The tractor three-point quick-change device according to claim 5, characterized in that, The pin (203) is provided with a torsion spring on its surface. The two ends of the torsion spring are connected to the lock plate (202) and the hook handle (210) respectively, so that the lock plate (202) rotates away from the vertical beam (102).

7. The tractor three-point quick-change device according to claim 1, characterized in that, The locking plate (202) is fixedly connected to the pin (203). One end of the pin (203) is detachably provided with a handle (204). The handle (204) drives the locking plate (202) to rotate to a position where the suspension pin (4) can be moved out of the hook groove (209).

8. The tractor three-point quick-change device according to claim 1, characterized in that, There are multiple hooks (201) and locking plates (202), and the multiple hooks (201) and locking plates (202) are staggered along the axial direction of the pin (203).

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