Connecting device for agricultural machinery

Abstract

The invention discloses a connecting device for agricultural machinery, which comprises a first connecting piece and a second connecting piece, and further comprises a locking mechanism, and the first connecting piece and the second connecting piece are detachably connected through the locking mechanism; the first connecting piece is provided with a locking pin, the second connecting piece is provided with a locking groove matched with the locking pin in a clamped mode, and the second connecting piece is movably connected with a limiting piece used for limiting separation of the locking pin and the locking groove. According to the scheme, the problem that in the prior art, relative movement is likely to happen when a machine tool and an agricultural machine body are connected is solved.

Description

Technical Field

[0001] The invention relates to a suspension connection device specially suitable for a machine body of an agricultural machine and an agricultural machine implement, in particular to a connection device for agricultural machinery. Background Art

[0002] The connection device for agricultural machinery is a device used to connect the working implement to the agricultural machinery body (agricultural machinery chassis), so that the agricultural machinery body can drive the implement to move for farming. Nowadays, agricultural machinery is generally equipped with a variety of implements with different functions, so when using them, the implements need to be frequently disassembled and replaced. The existing connection device between the implement and the agricultural machinery body generally adopts a three-point suspension connecting rod structure.

[0003] Chinese patent document CN214155306U discloses a multifunctional suspension device for a tractor, comprising: an upper pull rod, a left lower pull rod, a right lower pull rod, a left limit rod, a right limit rod, a left lifting rod, and a right lifting rod, wherein one end of the left lifting rod and the left limit rod are respectively mounted on the left lower pull rod, and one end of the right limit rod and the right lifting rod are respectively mounted on the right lower pull rod. The suspension device also comprises an articulated ball head, on which two pin holes of different diameters are designed. The articulated ball head is pressed into the holes at the ends of the upper pull rod and the lower pull rod by rolling and ensures that the articulated ball head can rotate flexibly in the holes. When in use, the corresponding pin holes on the articulated ball head are connected to matching agricultural implements or a test frame according to the requirements of the tractor or agricultural machinery.

[0004] In actual use, the use of a three-point suspension connecting rod structure connection device for connection makes it difficult to maintain a stable relative position between the machine and the machine body, so in some cases where the displacement between the machine and the machine body needs to be limited, it is not suitable to use a three-point suspension connecting rod structure connection device. Therefore, it is necessary to design a new connection device. Summary of the invention

[0005] The object of the present invention is to provide a connecting device for agricultural machinery, so as to solve the problem in the prior art that relative movement is easy to occur when the implement and the agricultural machinery body are connected.

[0006] In order to achieve the above-mentioned purpose, the basic scheme of the present invention provides a connecting device for agricultural machinery, including a first connecting member and a second connecting member, and also including a locking mechanism, wherein the first connecting member and the second connecting member are detachably connected through the locking mechanism; a locking pin is provided on the first connecting member, and a locking groove that is engaged with the locking pin is provided on the second connecting member, and a limit member is movably connected to the second connecting member for limiting the separation of the locking pin and the locking groove.

[0007] The beneficial effect of this basic solution is that when in use, the first connecting member is connected and fixed to the machine, and the second connecting member is connected and fixed to the machine body. The first connecting member and the second connecting member are connected together by the locking mechanism and the locking pin, the locking groove and the limit member, thereby realizing the mutual fixation of the first connecting member and the second connecting member, that is, the connection and fixation of the machine and the agricultural machinery body can be realized. Compared with the connection device of the prior art using a three-point suspension linkage structure, the relative movement between the machine and the agricultural machinery body can be greatly reduced, thereby meeting the connection requirements of limiting the displacement between the machine and the machine body.

[0008] Preferably, the position-limiting member has a blocking portion for limiting the locking pin from moving out of the opening of the locking groove. With such a configuration, the blocking portion blocks the locking pin from moving out of the opening of the locking groove, thereby making the structure of the position-limiting member limiting the separation of the locking pin from the locking groove simpler, which is conducive to improving the reliability of the position-limiting member.

[0009] Preferably, the end of the blocking portion is provided with a guide surface for guiding the locking pin when it is inserted into the locking groove, and a guide opening is formed between one side of the opening of the locking groove and the guide surface. With such a configuration, when the locking pin is inserted into the locking groove, it contacts the guide surface and pushes the stopper to move out of position, thereby facilitating the insertion operation of the locking pin and improving the convenience of operation.

[0010] Preferably, the movable connection between the limiter and the second connecting member is hinged. With such a setting, the limiter can change the position of the blocking portion by swinging around the hinge point to realize whether to restrict the locking pin, thereby improving the convenience of operation of the limiter.

[0011] Preferably, a resetting elastic member is connected between the position-limiting member and the second connecting member. With such a configuration, after the position-limiting member is displaced from the position limiting the separation of the locking pin and the locking groove, it will tend to return to its original position under the action of the resetting elastic member, so that when the force causing the position-limiting member to be displaced disappears, the position-limiting member will be reset in time, so that the blocking portion of the position-limiting member automatically returns to the position limiting the separation of the locking pin and the locking groove, which is conducive to improving the convenience of operation.

[0012] Preferably, the resetting elastic member is a torsion spring. The torsion spring is easy to install and set, especially for a hinged limiter, the torsion spring can make the limiter swing more reliable, thereby improving the reliability of the limiter.

[0013] Preferably, the second connecting member is connected with an operating mechanism for releasing the limiting effect of the limiting member on the locking pin. With such a configuration, the limiting effect of the limiting member on the locking pin is released by the operating mechanism, thereby improving the convenience of operation and facilitating the user to operate when changing the tool.

[0014] Preferably, the operating mechanism comprises an operating rod, the middle part of which is hinged to the second connecting member, one end of which is slidably matched with a limiting member, and the limiting member is provided with an unlocking positioning groove which is concave-convexly matched with the end of the operating rod. With such a configuration, the operating rod is rotated to push the limiting member to move, and when the end of the operating rod is inserted into the unlocking positioning groove, the limiting member is in a completely unrestricted state for the locking pin, and the limiting member is in a stable state under the joint action of the elastic reset member and the operating rod, so that it is convenient to operate when the locking pin is moved out of the locking groove.

[0015] Preferably, the locking mechanism comprises a pin connected between the first connector and the second connector, a protrusion protruding toward the direction of the pin is provided at the opening of the locking groove, and the minimum distance from the edge of the protrusion to the center of the pin is smaller than the maximum distance from the edge of the locking pin to the center of the pin. With such a configuration, when the first connector and the second connector are connected by the pin, the locking pin is also engaged in the locking groove. At this time, even if the limiting member loses its limiting effect on the locking pin, the locking pin will not move out of the locking groove due to the presence of the protrusion, thereby preventing the first connector and the second connector from accidentally disengaging when the limiting member fails.

[0016] The present invention has the following beneficial effects: 1. The present invention is used to connect the agricultural machinery body and the implement, which can greatly reduce the relative movement between the implement and the agricultural machinery body, and does not need to use a universal joint, thereby simplifying the structure; during the connection operation, the limiting member is directly pushed away by the locking pin and inserted into the locking groove, and the limiting member automatically returns to its original position under the action of the reset elastic member, thereby omitting the step of aligning the locking pin and the corresponding hole, thereby realizing a quick connection between the implement and the agricultural machinery body.

[0017] 2. When removing the implement from the agricultural machine body, the limiting effect of the limiter on the locking pin is released, so that the locking pin can be easily moved out of the locking groove, thereby facilitating the operation of removing the implement from the agricultural machine body. The present invention can also prevent accidental disengagement when the limiter fails. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of an embodiment of a connecting device for agricultural machinery of the present invention when it is in a locked state; Figure 2 for Figure 1 Axial view along the locking pin; Figure 3 It is a schematic diagram of an embodiment of a connecting device for agricultural machinery of the present invention when it is in an unlocked state; Figure 4 for Figure 3Axial view along the locking pin; Figure 5 for Figure 4 Middle AA section view. DETAILED DESCRIPTION

[0019] The following is further described in detail through specific implementation methods: The figure marks in the drawings of the specification include: a first connecting member 1, a second connecting member 2, a pin shaft 3, a handle 4, an operating rod 5, a reset elastic member 6, a limit member 7, an unlocking positioning groove 71, a locking positioning groove 72, a blocking portion 73, a guide surface 74, a locking pin 8, a locking groove 9, and a protrusion 10.

[0020] The embodiment is basically as shown in the attached Figures 1 to 5 As shown: A connection device for agricultural machinery, including a first connection member 1 and a second connection member 2, the first connection member 1 is used to connect and fix with the machine, and the second connection member 2 is used to connect and fix with the machine body, and the connection between the machine and the machine body can be achieved by connecting the first connection member 1 and the second connection member 2. In this embodiment, the first connection member 1 and the second connection member 2 are both plate-shaped. The connection device also includes a locking mechanism, and the first connection member 1 and the second connection member 2 are detachably connected through the locking mechanism. In this embodiment, the locking mechanism includes a pin 3, and the first connection member 1 and the second connection member 2 are both provided with a connection hole that is clearance-matched with the pin 3, and the first connection member 1 and the second connection member 2 are connected by inserting the pin 3 into the connection hole. When the pin 3 is a cylindrical pin 3, the first connection member 1 and the second connection member 2 can also be mutually hinged through the pin 3.

[0021] The first connecting member 1 is provided with a locking pin 8, the second connecting member 2 is provided with a locking groove 9 that is engaged with the locking pin 8, and the second connecting member 2 is movably connected with a stopper 7 for limiting the separation of the locking pin 8 from the locking groove 9. In this embodiment, the locking pin 8 is cylindrical, and the bottom surface of the locking groove 9 is an arc surface, so that the locking pin 8 can rotate smoothly in the locking groove 9. In this embodiment, the movable connection between the stopper 7 and the second connecting member 2 is a hinge. Of course, in other embodiments, the movable connection between the stopper 7 and the second connecting member 2 can also be a sliding connection or the like. In this embodiment, the stopper 7 has a blocking portion 73 for limiting the locking pin 8 from moving out of the opening of the locking groove 9. When the locking pin 8 is located in the locking groove 9, the blocking portion 73 is located at the opening of the locking groove 9 with the movement of the stopper 7, thereby blocking the locking pin 8 from moving out of the locking groove 9. A reset elastic member 6 is connected between the stopper 7 and the second connecting member 2. In this embodiment, the reset elastic member 6 is preferably a torsion spring, and the hinged limit member 7 is reset after displacement by the torsion spring, which can make the setting of the torsion spring simpler and more convenient, and improve reliability.

[0022] In order to further facilitate the replacement operation, a guide surface 74 is provided at the end of the blocking portion 73 for guiding the locking pin 8 when it is inserted into the locking groove 9, and a guide opening is formed between one side of the opening of the locking groove 9 and the guide surface 74. When the locking pin 8 is inserted into the locking groove 9, the locking pin 8 moves along the guide opening to push the blocking portion 73 to move, thereby pushing the limiting member 7 to deflect and shift, and then when the locking pin 8 is inserted into the locking groove 9, the operation can be completed without moving the limiting member 7 first, thereby improving the convenience of operation.

[0023] In order to further facilitate the replacement operation, an operating mechanism for releasing the limiting effect of the limiting member 7 on the locking pin 8 is connected to the second connecting member 2. In this embodiment, the operating mechanism includes an operating rod 5, the middle part of which is hinged to the second connecting member 2, one end of which is slidably matched with the limiting member 7, and an unlocking positioning groove 71 which is concave-convexly matched with the end of the operating rod 5 is provided on the limiting member 7. The operating rod 5 forms a lever connected to the second connecting member 2, and a handle 4 is connected to the end of the operating rod 5 away from the limiting member 7 to facilitate the operation of the operating rod 5. The operating rod 5 is rotated by pulling the end of the operating rod 5 away from the limiting member 7, so that the operating rod 5 pushes the limiting member 7 to rotate and the limiting member 7 drives the blocking portion 73 away from the position of limiting the locking pin 8, until the operating rod 5 is inserted into the unlocking positioning groove 71, and the limiting member 7 is in a state of completely losing the restriction on the locking pin 8. A locking positioning groove 72 may also be provided on the limiting member 7. When the limiting member 7 is in a state of limiting the locking pin 8, the operating rod 5 is also inserted into the locking positioning groove 72, so that the limiting member 7 is in a relatively stable state under the joint action of the resetting elastic member 6 and the operating rod 5. Therefore, when the locking pin 8 is not inserted into the locking groove 9, the limiting member 7 is still in a limiting position, so that the position of the limiting member 7 when the locking pin 8 is not inserted into the locking groove 9 remains consistent, so that the locking pin 8 is conveniently inserted into the locking groove 9 by pushing the limiting member 7 to move.

[0024] In order to prevent accidental disengagement, a protrusion 10 protruding toward the direction of the pin shaft 3 is provided at the opening of the locking groove 9, and the minimum distance L from the edge of the protrusion 10 to the center of the pin shaft 3 is less than the maximum distance M from the edge of the locking pin 8 to the center of the pin shaft 3. When the stopper 7 loses its limiting effect on the locking pin 8, the locking pin 8 and the pin shaft 3 of the locking mechanism are connected between the first connecting member 1 and the second connecting member 2. When the locking pin 8 slides along the locking groove 9 with the pin shaft 3 as the center, due to the presence of the protrusion 10, the locking pin 8 is blocked by the protrusion 10 and is difficult to move out of the locking groove 9, thereby avoiding accidental disengagement.

[0025] The specific implementation process is as follows: the first connecting member 1 is connected and fixed to the implement, and the second connecting member 2 is connected and fixed to the agricultural machine body. The specific fixing connection method can be welding, bolt connection or integrated molding.

[0026] When it is necessary to connect the implement to the agricultural machine body, first insert the locking pin 8 into the locking groove 9 from the open end of the locking groove 9. When the locking pin 8 is inserted into the locking groove 9, the locking pin 8 will first pass through the guide opening formed by the guide surface 74 and one side of the opening of the locking groove 9, so that the locking pin 8 pushes the limiter 7 to rotate and move out of position through the guide surface 74. When the locking pin 8 is completely inserted into the locking groove 9, the limiter 7 is reset under the action of the reset elastic member 6, so that the blocking portion 73 is blocked at the opening of the locking groove 9 and the locking pin 8 is restricted from moving out of the locking groove 9. Then adjust the position of the first connecting member 1 and the second connecting member 2, align the connection holes of the pin shaft 3 used to connect the locking mechanism, and finally insert the pin shaft 3 into the connection hole, thereby realizing the connection between the first connecting member 1 and the second connecting member 2, and then realizing the connection between the implement and the agricultural machine body.

[0027] When it is necessary to disassemble the implement from the agricultural machine body, the operating rod 5 is pulled so that the end of the operating rod 5 in contact with the limiter 7 slides from the locking positioning groove 72 to the unlocking positioning groove 71. During the rotation of the operating rod 5, the limiter 7 rotates and drives the blocking portion 73 to leave the open end of the locking groove 9, so that the limiter 7 loses its restrictive effect on the locking pin 8. The pin shaft 3 of the locking mechanism is removed from between the first connecting member 1 and the second connecting member 2, and then the locking pin 8 is removed from the locking groove 9, so that the first connecting member 1 and the second connecting member 2 can be separated, thereby realizing the separation of the implement from the agricultural machine body.

[0028] The connection device of the present invention solves the problems of inconvenient connection between the implement and the agricultural machine body and slow replacement speed in the prior art.

[0029] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A connecting device for agricultural machinery, comprising a first connecting member and a second connecting member, characterized in that: It also includes a locking mechanism, through which the first connecting member and the second connecting member are detachably connected; a locking pin is provided on the first connecting member, a locking groove that is engaged with the locking pin is provided on the second connecting member, and a limiting member is movably connected to the second connecting member for limiting the separation of the locking pin and the locking groove.

2. A connection device for agricultural machinery according to claim 1, characterized in that: The limiting member has a blocking portion for limiting the locking pin from moving out of the opening of the locking groove.

3. A connection device for agricultural machinery according to claim 2, characterized in that: The end of the blocking portion is provided with a guide surface for guiding the locking pin when it is inserted into the locking groove, and a guide opening is formed between one side edge of the opening of the locking groove and the guide surface.

4. A connection device for agricultural machinery according to claim 3, characterized in that: The movable connection between the limiting member and the second connecting member is hinged.

5. A connection device for agricultural machinery according to any one of claims 1 to 4, characterized in that: A reset elastic member is connected between the limiting member and the second connecting member.

6. A connection device for agricultural machinery according to claim 5, characterized in that: The resetting elastic member is a torsion spring.

7. A connection device for agricultural machinery according to claim 6, characterized in that: The second connecting member is connected to an operating mechanism for releasing the limiting effect of the limiting member on the locking pin.

8. A connection device for agricultural machinery according to claim 7, characterized in that: The operating mechanism comprises an operating rod, the middle part of which is hinged to the second connecting member, one end of which is slidably matched with a limiting member, and the limiting member is provided with an unlocking positioning groove which is concave-convexly matched with the end of the operating rod.

9. A connection device for agricultural machinery according to claim 8, characterized in that: The locking mechanism includes a pin connected between the first connecting member and the second connecting member, and a protrusion protruding toward the direction of the pin is provided at the opening of the locking groove, and the minimum distance from the edge of the protrusion to the center of the pin is smaller than the maximum distance from the edge of the locking pin to the center of the pin.

Images