Middle-mounted mower automatic hooking mechanism, mower and tractor

Abstract

The utility model relates to an automatic hooking mechanism of a middle-mounted mower, the mower and a tractor, and the automatic hooking mechanism of the middle-mounted mower comprises a front hooking assembly, a middle-rear hooking assembly used for being fixedly connected to the tractor, and a hook used for being fixed at the rear end of a mower assembly, the front hooking assembly and the middle-rear hooking assembly are located at the front end and the rear end of the tractor respectively, the middle-rear hooking assembly and the hook are connected in a hooking mode, and the middle-rear hooking assembly is used for supporting a universal joint transmission shaft connected to the tractor. According to the utility model, the middle mowers and tractors of different models can be smoothly hooked and used.

Description

Technical Field

[0001] The utility model relates to the technical field of lawn maintenance equipment, in particular to an automatic coupling mechanism for a mid-mounted lawn mower, a lawn mower and a tractor. Background Art

[0002] Small horsepower tractors have a good performance in garden mowing operations and are widely used. As one of the mowing equipment, in the existing technology, the lawn mower placed in the belly of the tractor is a non-standard interface machine, which needs to be designed with an interface matching with the tractor to be normally connected and operated. The model needs to match, resulting in users being unable to interchange, connect and use it at will. Utility Model Content

[0003] The utility model provides an automatic coupling mechanism for a center-mounted lawn mower, a lawn mower and a tractor, which can realize smooth coupling and use of center-mounted lawn mowers and tractors of different models.

[0004] The technical solution of the utility model to solve the above technical problems is as follows:

[0005] In a first aspect, the utility model provides an automatic coupling mechanism for a mid-mounted lawn mower, comprising a front coupling assembly, a mid-rear coupling assembly for fixedly connected to a tractor, and a hook for fixed to the rear end of the lawn mower assembly, wherein the front coupling assembly and the mid-rear coupling assembly are respectively located at the front and rear ends of the tractor, the mid-rear coupling assembly and the hook are coupled to each other, and the mid-rear coupling assembly is used to support a universal joint drive shaft connected to the tractor.

[0006] The beneficial effect of the utility model is that when the tractor and the lawn mower assembly are connected, the lawn mower assembly is first placed on the horizontal ground, and the tractor (with the center-rear connection assembly installed) is driven onto the lawn mower assembly from the rear until it straddles the lawn mower assembly. During this process, the center-rear connection assembly and the hook are connected to each other, and the universal joint drive shaft and the transmission box installed on the lawn mower assembly are automatically connected. Through this connection method, the center-rear connection assembly can be installed on the tractor, and there is no need to design the interface matching between the lawn mower assembly and the tractor, so that different models of lawn mower assemblies and tractors can be smoothly connected and used.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, the middle and rear hitch assembly includes a front end for fixedly connecting the middle hitch assembly to the tractor and a rear end for fixedly connecting the rear hitch assembly to the tractor, the rear end of the middle hitch assembly extends backward and is provided with a slot for matching the hook, the front end of the rear hitch assembly is rotatably connected to the middle hitch assembly, and the rear end of the middle hitch assembly is used to support a universal joint drive shaft connected to the tractor.

[0009] The beneficial effect of adopting the above further scheme is that when the middle and rear hitch assembly and the hook are connected to each other, as the tractor moves, the hook on the lawn mower assembly enters the slot to achieve the connection, and the universal joint drive shaft and the transmission box installed on the lawn mower assembly automatically complete the connection.

[0010] Furthermore, a limiting component is installed at the rear end of the middle hanging assembly, and the middle hanging assembly is provided with two sockets, the limiting component includes a locking plate rotatably connected to the middle hanging assembly at the middle end, a limiting pin inserted into the middle hanging assembly at one end, and a pin inserted into one of the sockets, the limiting pin abuts against the upper side of the front end of the locking plate, and the socket close to the limiting pin is located on the upper side of the rear end of the locking plate, the other socket is located outside the rotation circle of the locking plate, and the rear end of the locking plate is blocked in the slot.

[0011] The beneficial effect of adopting the above further scheme is: before the middle hooking assembly and the hook are hooked to each other, the pin is inserted into the other socket, and then the hooking is carried out. During the hooking process, the locking plate is hit by the hook and rotates counterclockwise until the hook enters the slot. After the hooking action of the middle hooking assembly and the hook is completed, the pin is inserted into one of the sockets to complete the limiting of the locking plate, so that the locking plate limits the hook in the slot and will not fall out.

[0012] Furthermore, the middle hitch assembly is fixedly connected with a curved beam, the curved beam is fixedly connected with a connecting plate, and the connecting plate is detachably connected with a side plate of a spline sleeve for supporting a universal joint transmission shaft.

[0013] The beneficial effect of adopting the above further solution is that during the hooking process, the side plate supports the spline sleeve of the universal joint transmission shaft to ensure that the spline sleeve and the shaft head of the transmission box installed on the lawn mower assembly are accurately connected.

[0014] Furthermore, a front guide plate is fixed on the side plate, and a lower guide plate is provided in cooperation with the front guide plate, and the lower guide plate is used to be fixed to the lawn mower assembly.

[0015] The beneficial effect of adopting the above further solution is that during the hooking process, the lower guide plate guides the front guide plate to ensure that the spline sleeve and the shaft head of the transmission box installed on the lawn mower assembly are accurately connected.

[0016] Furthermore, a side guide plate for fixedly mounting on the lawn mower assembly is provided in the hook, and the side guide plate is used to cooperate and guide the middle hook assembly.

[0017] The beneficial effect of adopting the above further solution is that during the hooking process, the side guide plate guides the advancement of the front middle hooking assembly to ensure accurate hooking of the front middle hooking assembly and the hook.

[0018] Furthermore, the automatic attachment mechanism for the mid-mounted lawn mower further comprises two upper plates which are spaced apart from each other, and the upper plates are used for being detachably connected to the lawn mower assembly.

[0019] The beneficial effect of adopting the above further solution is that it is convenient for the tractor to drive onto the lawn mower assembly through the upper plate, so that the front wheels of the tractor pass through and drive off the lawn mower assembly.

[0020] Furthermore, the hooking mechanism also includes a guide curved beam located between the two upper plates, the guide curved beam is used to be detachably connected to the lawn mower assembly, and the guide curved beam is close to one of the upper plates.

[0021] The beneficial effect of adopting the above further scheme is that when the front wheels of the tractor pass through and drive off the lawn mower assembly, the wheels can be blocked by the guide curved beam, and by observing the guide curved beam, it can be determined that the center of the tractor is consistent with the center of the lawn mower assembly.

[0022] In a second aspect, the utility model provides a mid-mounted lawn mower, including the automatic coupling mechanism for the mid-mounted lawn mower.

[0023] In a third aspect, the utility model provides a tractor, comprising the above-mentioned mid-mounted lawn mower. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an axonometric drawing of the utility model;

[0025] Figure 2 for Figure 1 A first partial structural schematic diagram of;

[0026] Figure 3 for Figure 1 A second partial structural schematic diagram of;

[0027] Figure 4 for Figure 3 Enlarged view of part A in the middle;

[0028] Figure 5 It is a partial structural schematic diagram of the central hitch assembly of the utility model;

[0029] Figure 6 It is a partial structural schematic diagram of the utility model;

[0030] Figure 7 It is a structural schematic diagram of another viewing angle of the utility model;

[0031] Figure 8 for Figure 7 Enlarged view of middle part B;

[0032] Fig. 9 It is a top view of the local structure of the utility model;

[0033] Fig.10 It is a partial structural sectional view of the utility model.

[0034] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0035] 1. Lifter assembly; 11. Universal joint transmission shaft; 12. Spline sleeve;

[0036] 2. Lawn mower assembly; 21. Transmission box;

[0037] 3. front hitch assembly; 31. hook assembly; 311. hook portion; 32. front hitch assembly;

[0038] 5. Middle hitch assembly; 521. Notch; 55. Limiting assembly; 551. Locking plate; 5511. Limiting slot; 552. Limiting pin; 553. Latch; 554. Socket; 56. Bending beam; 561. Connecting plate; 562. Side plate; 5621. Hook; 563. Front guide plate; 564. Lower guide plate; 565. Side guide plate;

[0039] 6. Rear hitch assembly;

[0040] 7. Hook; 71. Boarding plate; 72. Guide curved beam. DETAILED DESCRIPTION

[0041] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0042] It should be noted that if Figure 1 , Figure 6-Figure 9 The lawn mower assembly 2 is a shell structure with a downward opening, a cutting knife is arranged in the lower opening, and a power transmission component (such as a transmission box 21) is installed on the upper side thereof, the shaft head of the power transmission component is transmission-connected with the spline sleeve 12 of the universal joint transmission shaft 11, the universal joint transmission shaft 11 is transmission-connected with the power output assembly of the tractor (not shown in the figure), and the output end of the power transmission component is transmission-connected with the cutting knife (not shown in the figure), so that the universal joint transmission shaft 11 is controlled by the tractor, and the cutting knife is driven to rotate through the transmission of the transmission box 21 to complete the lawn mowing operation.

[0043] Furthermore, a plurality of rollers are fixed to the lower end of the shell of the lawn mower assembly 2 to facilitate moving operations.

[0044] When the mower assembly 2 is used as a mid-mounted mower in combination with a tractor, the mower assembly 2 is placed on a horizontal ground, and the tractor passes over the mower assembly 2 from the rear, and the front wheels pass through and drive off the mower assembly 2. During this process, the mower assembly 2 is automatically connected to the tractor through the universal joint transmission shaft 11 connected to the tractor and the transmission box 21 installed on the mower assembly 2. After that, the mower assembly 2 can be lifted by the lifter assembly 1 of the tractor, so that the mower assembly 2 is off the ground, so that the tractor can travel to the mowing destination and perform subsequent operations.

[0045] It should be noted that the present invention only describes in detail how to complete the coupling of the lawn mower assembly 2 and the tractor, and how to automatically complete the coupling by the universal joint drive shaft 11 connected to the tractor and the transmission box 21 installed on the lawn mower assembly 2. Other operations, such as how to lift the lawn mower assembly 2, are not described in detail and are not the focus of protection of the present invention.

[0046] The utility model is described in detail below.

[0047] On the one hand, the utility model provides an automatic coupling mechanism for a mid-mounted lawn mower, as described in detail below.

[0048] Example 1

[0049] like Figures 1 to 10 A mid-mounted lawn mower automatic coupling mechanism includes a front coupling assembly 3, a mid-rear coupling assembly for fixedly connecting to a tractor, and a hook 7 for fixing to the rear end of the lawn mower assembly 2. The front coupling assembly 3 and the mid-rear coupling assembly are respectively located at the front and rear ends of the tractor, the mid-rear coupling assembly and the hook 7 are coupled to each other, and the mid-rear coupling assembly is used to support a universal joint transmission shaft 11 connected to the tractor.

[0050] The beneficial effect of this embodiment is that when the tractor and the lawn mower assembly 2 are connected, the lawn mower assembly 2 is first placed on the horizontal ground, and the tractor equipped with the center-rear connection assembly (connected with the universal joint transmission shaft 11) is driven from the rear to the lawn mower assembly 2 until it straddles the lawn mower assembly 2. During this process, the center-rear connection assembly and the hook 7 are connected to each other, and the universal joint transmission shaft 11 and the transmission box 21 installed on the lawn mower assembly 2 are automatically connected. Through this connection method, the center-rear connection assembly can be installed on the tractor, and there is no need for the lawn mower assembly 2 to be interface-matched with the tractor, so that different models of lawn mower assemblies 2 and tractors can be smoothly connected and used.

[0051] The term “front end” is used in Figure 1 The left side is the front, and the “back end” is Figure 1The right side is the rear, and the components are connected from left to right in sequence to form the "front end" and "rear end" in the above terms. Further explanation: when the tractor travels above the mower assembly 2 to complete the docking action, it drives from the rear to the front in the direction shown in the figure.

[0052] Based on the above embodiment, the front hitch assembly 3 includes a front end hitch assembly 31 for fixedly connecting to the tractor and a rear end hitch assembly 32 for rotationally connecting to the front end of the lawn mower assembly 2. The rear end of the hitch assembly 31 and the front end of the front hitch assembly 32 are connected to each other, and the hitch assembly 31 and the middle and rear hitch assembly are respectively located at the front and rear ends of the tractor. When the tractor and the lawn mower assembly 2 are connected, the lawn mower assembly 2 is first placed on the horizontal ground, and the tractor (connected with the universal joint drive shaft 11) equipped with the hook component 31 and the middle and rear connecting assembly is driven from the rear to the lawn mower assembly 2 until it straddles the lawn mower assembly 2. During this process, the hook component 31 is automatically connected to the front end of the front connecting component 32, and the middle and rear connecting assembly and the hook 7 are connected to each other, and the universal joint drive shaft 11 and the transmission box 21 installed on the lawn mower assembly 2 are automatically connected. Through this connection method, the hook component 31 and the middle and rear connecting assembly can be installed on the tractor, and there is no need for the lawn mower assembly 2 to be designed with an interface matching design on the tractor, so that different models of lawn mower assemblies 2 and tractors can be smoothly connected and used.

[0053] The front end of the hook assembly 31 is fixedly connected to the tractor by bolts. The rear end of the hook assembly 31 is bent forward to form a hook portion 311, and as the tractor moves forward, the hook portion 311 is hooked with the front end of the front hook assembly 32.

[0054] Among them, the front end of the front hanging component 32 is bent upward into a rod shape to form a hanging portion to be hung on the hook portion 311 of the hook component 31, and the rear end of the front hanging component 32 extends horizontally backward to form two rod portions, and the two rod portions are used to rotate and connect to the front end of the lawn mower assembly 2.

[0055] Based on the above embodiment, the rear end of the front hanging assembly 32 is rotatably connected to a mounting shaft for being fixedly connected to the front end of the lawn mower assembly 2, and a torsion spring is sleeved and fixedly connected on the mounting shaft, one end of the torsion spring is fixedly connected to two rod portions formed by horizontally extending backward from the rear end of the front hanging assembly 32 to maintain the balance between the front hanging assembly 32 and the lawn mower assembly 2.

[0056] On the basis of the above-mentioned embodiment, the hook 7 is in a "U" shape as a whole and opens downwards, and two arms at the open end thereof extend forwards to be fixedly connected to the rear end of the lawn mower assembly 2 .

[0057] As one of the specific solutions of the utility model, at least one hook 7 is provided, and the hooking with the middle and rear hooking assembly can be completed by the one hook 7.

[0058] As the second specific solution of the utility model, at least two hooks 7 are provided, and along the front-to-back direction, the connection point between the front hook component 32 and the lawn mower assembly 2 is located at the midpoint of at least two hooks 7 to ensure that the lawn mower assembly 2 maintains force balance during the lifting process of the lawn mower assembly 2.

[0059] Example 2

[0060] like Figures 3 to 5 On the basis of Example 1, the middle and rear hitch assembly includes a front end for fixing the middle hitch assembly 5 connected to the tractor and a rear end for fixing the rear hitch assembly 6 connected to the tractor. The rear end of the middle hitch assembly 5 extends backward and is provided with a slot 521 for matching the hitch hook 7. The front end of the rear hitch assembly 6 is rotatably connected to the middle hitch assembly 5, and the rear end of the middle hitch assembly 5 is used to support the universal joint drive shaft 11 connected to the tractor.

[0061] The beneficial effect of adopting the preferred scheme in the above embodiment is that when the center-rear hitch assembly and the hook 7 are connected to each other, as the tractor moves, the hook 7 on the lawn mower assembly 2 enters the slot 521 to achieve the connection, and the universal joint drive shaft 11 and the transmission box 21 installed on the lawn mower assembly 2 automatically complete the connection.

[0062] The slot 521 opens toward the direction where the front hanging assembly 32 is located.

[0063] The front end of the rear hitch assembly 6 is rotatably connected to the middle hitch assembly 5 , and the rotation connection point is located in front of the middle and rear hitch assembly and the hook 7 connection point.

[0064] After the middle and rear hitch assemblies and the hook 7 are hooked to each other, the connection relationship formed by the middle and rear hitch assemblies from front to back is: the front end of the middle hitch assembly 5 (shown as the upper end in the figure) is fixedly connected to the middle part of the tractor, specifically fixed to the rear axle housing of the tractor's gearbox; the rear end of the middle hitch assembly 5 (shown as the lower end in the figure) extends backward and is cooperatively hooked to the hook 7; in front of the hooking point, the middle and rear end of the middle hitch assembly 5 is rotationally connected to the front end of the rear hitch assembly 6; the rear end of the rear hitch assembly 6 is fixedly connected to the rear part of the tractor, specifically connected to the left lifting arm of the tractor's lifter assembly 1 through a transmission connection; wherein, the rear end of the middle hitch assembly 5 also supports the universal joint drive shaft 11 connected to the tractor.

[0065] Corresponding to the specific solution in the embodiment, the number of the middle hitch assemblies 5 is equal to the number of the hooks 7 .

[0066] In the figure, the number of the middle hitch assembly 5 and the number of the hooks 7 are both shown to be two.

[0067] Example 3

[0068] like Figures 3 to 5 On the basis of embodiments 1 and 2, a limiting component 55 is installed at the rear end of the middle hitch assembly 5, and the middle hitch assembly 5 is provided with two insertion holes 554, the limiting component 55 includes a locking plate 551 rotatably connected to the middle hitch assembly 5 at the middle end, a limiting pin 552 inserted into the middle hitch assembly 5 at one end, and a pin 553 inserted into one of the insertion holes 554, the limiting pin 552 abuts against the upper side of the front end of the locking plate 551, and the insertion hole 554 close to the limiting pin 552 is located on the upper side of the rear end of the locking plate 551, the other insertion hole 554 is located outside the rotation circle of the locking plate 551, and the rear end of the locking plate 551 is blocked in the notch 521.

[0069] The beneficial effect of adopting the preferred scheme in the above embodiment is that before the middle hooking assembly 5 and the hook 7 are hooked to each other, the pin 553 is inserted into the other socket 554, and then the hooking is carried out. During the hooking process, the locking plate 551 is hit by the hook 7 and rotates counterclockwise until the hook 7 enters the slot 521. After the hooking action of the middle hooking assembly 5 and the hook 7 is completed, the pin 553 is inserted into one of the sockets 554 to complete the limiting of the locking plate 551, so that the locking plate 551 limits the hook 7 in the slot 521 and will not fall out.

[0070] The middle end of the locking plate 551 is rotatably connected to the middle hook assembly 5 through a combined structure of a bolt and a sleeve.

[0071] The other socket 554 is specifically located behind the first socket 554 .

[0072] Based on the above embodiment, a limiting groove 5511 is provided on the rear end side of the locking plate 551, so that when the locking plate 551 limits the hook 7 in the slot 521, the hook 7 simultaneously enters the limiting groove 5511, further preventing the hook 7 from falling out.

[0073] Example 4

[0074] like Figures 6 to 10 On the basis of embodiments 1-3, the middle hitch assembly 5 is fixedly connected with a curved beam 56, the curved beam 56 is fixedly connected with a connecting plate 561, and the connecting plate 561 is detachably connected with a side plate 562 for supporting the spline sleeve 12 of the universal joint transmission shaft 11.

[0075] The beneficial effect of adopting the preferred solution in the above embodiment is that during the hooking process, the side plate 562 supports the spline sleeve 12 of the universal joint transmission shaft 11 to ensure that the spline sleeve 12 and the shaft head of the transmission box 21 installed on the lawn mower assembly 2 are accurately connected.

[0076] Corresponding to the second embodiment, in the figure, two middle hitch assemblies 5 are shown, and the two ends of the curved beam 56 are respectively fixed to the rear ends of the two middle hitch assemblies 5. Two connecting plates 561 are arranged at intervals, and two side plates 562 are arranged at intervals. The two connecting plates 561 and the two side plates 562 are connected one by one, and the two side plates 562 are supported on the spline sleeve 12 supporting the universal joint transmission shaft 11 at the same time.

[0077] Based on the above embodiment, a hook 5621 is integrally formed at the lower end of at least one side plate 562 , and the hook 5621 supports the curved beam 56 .

[0078] Example 5

[0079] like Figures 6 to 10 On the basis of embodiments 1-4, a front guide plate 563 is fixed on the side plate 562, and the front guide plate 563 is provided with a lower guide plate 564, which is used to be fixed to the lawn mower assembly 2.

[0080] The beneficial effect of adopting the preferred solution in the above embodiment is that during the hooking process, the lower guide plate 564 guides the front guide plate 563 to ensure that the spline sleeve 12 and the shaft head of the transmission box 21 installed on the lawn mower assembly 2 are accurately connected.

[0081] As a specific solution of the above embodiment, the front end of the front guide plate 563 is bent upward to form an inclined plate; the rear end of the lower guide plate 564 is bent downward to form an inclined plate, and the two inclined plates cooperate with each other to form a guiding effect.

[0082] Example 6

[0083] like Figures 6 to 10 On the basis of embodiments 1-5, a side guide plate 565 for fixedly mounting on the lawn mower assembly 2 is provided in the hook 7, and the side guide plate 565 is used to cooperate with the guiding middle hook assembly 5.

[0084] The beneficial effect of adopting the preferred solution in the above embodiment is that, during the hooking process, the side guide plate 565 guides the advancement of the front middle hooking assembly 5 to ensure that the front middle hooking assembly 5 and the hook 7 are accurately hooked.

[0085] As a specific solution of the above embodiment, the side guide plate 565 is vertically arranged, and the rear end is bent outward to form an inclined plate. When two hooks 7 are correspondingly arranged, two side guide plates 565 are arranged, and the rear ends of the two side guide plates 565 are bent outward away from each other to form an inclined plate.

[0086] Example 7

[0087] like Figure 3 and Figure 7On the basis of embodiments 1-6, the hooking mechanism further includes two upper plates 71 spaced apart from each other, and the upper plates 71 are used for being detachably connected to the lawn mower assembly 2.

[0088] The beneficial effect of adopting the preferred solution in the above embodiment is that it is convenient for the tractor to drive onto the lawn mower assembly 2 through the upper plate 71, so that the front wheels of the tractor pass through and drive off the lawn mower assembly 2.

[0089] On the basis of the above embodiment, the boarding plate 71 is arranged on the outer side of the hook 7 .

[0090] Example 8

[0091] like Figure 3 and Figure 7 On the basis of embodiments 1-7, the automatic attachment mechanism for the mid-mounted lawn mower further includes a guide curved beam 72 located between the two upper plates 71 , the guide curved beam 72 is used for being detachably connected to the lawn mower assembly 2 , and the guide curved beam 72 is close to one of the upper plates 71 .

[0092] The beneficial effect of adopting the preferred solution in the above embodiment is that when the front wheels of the tractor pass through and drive off the lawn mower assembly 2, the guide curved beam 72 can be used to block the wheels, and by observing the guide curved beam 72, it can be determined that the center of the tractor is consistent with the center of the lawn mower assembly 2.

[0093] On the basis of the above-mentioned embodiment, the guide curved beam 72 is located between the upper vehicle plate 71 and the hook 7, and the guide curved beam 72 may be one, two, etc.

[0094] Example 9

[0095] In a second aspect, the utility model further provides a mid-mounted lawn mower, including a mid-mounted lawn mower automatic attachment mechanism as described in embodiments 1 to 8. To use this lawn mower, a user only needs to purchase a lawn mower assembly 2 containing the mid-mounted lawn mower automatic attachment mechanism, and install the mid-rear attachment assembly of the mid-mounted lawn mower automatic attachment mechanism on his own tractor, thereby reducing the use cost.

[0096] Example 10

[0097] In a third aspect, the utility model further provides a tractor, comprising a mid-mounted lawn mower as described in Example 9.

[0098] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0099] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0100] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0101] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0102] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0103] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An automatic hooking mechanism for a mid-mounted lawn mower, characterized in that: The utility model comprises a front hitch assembly (3), a middle and rear hitch assembly for being fixedly connected to a tractor, and a hook (7) for being fixed to the rear end of a lawn mower assembly (2), wherein the front hitch assembly (3) and the middle and rear hitch assembly are respectively located at the front and rear ends of the tractor, the middle and rear hitch assembly and the hook (7) are connected to each other, and the middle and rear hitch assembly is used to support a universal joint transmission shaft (11) connected to the tractor.

2. The automatic attachment mechanism for a mid-mounted lawn mower according to claim 1, characterized in that: The middle and rear hitch assembly comprises a front end for fixedly connecting to a middle hitch assembly (5) of a tractor and a rear end for fixedly connecting to a rear hitch assembly (6) of the tractor, the rear end of the middle hitch assembly (5) extending rearward and provided with a notch (521) for matching the hitch hook (7), the front end of the rear hitch assembly (6) being rotatably connected to the middle hitch assembly (5), and the rear end of the middle hitch assembly (5) being used to support a universal joint transmission shaft (11) connected to the tractor.

3. The automatic attachment mechanism for a mid-mounted lawn mower according to claim 2, characterized in that: A limiting component (55) is installed at the rear end of the middle hook assembly (5), and the middle hook assembly (5) is provided with two insertion holes (554), the limiting component (55) comprises a locking plate (551) rotatably connected to the middle hook assembly (5), a limiting pin (552) inserted in the middle hook assembly (5), and a plug (553) inserted into one of the insertion holes (554), the limiting pin (552) abuts against the upper side of the front end of the locking plate (551), and the insertion hole (554) close to the limiting pin (552) is located at the upper side of the rear end of the locking plate (551), and the other insertion hole (554) is located outside the rotation circle of the locking plate (551), and the rear end of the locking plate (551) is blocked in the notch (521).

4. The automatic attachment mechanism for a mid-mounted lawn mower according to claim 2, characterized in that: The middle hitch assembly (5) is fixedly connected to a curved beam (56), the curved beam (56) is fixedly connected to a connecting plate (561), and the connecting plate (561) is detachably connected to a side plate (562) of a spline sleeve (12) for supporting a universal joint transmission shaft (11).

5. The automatic attachment mechanism for a mid-mounted lawn mower according to claim 4, characterized in that: A front guide plate (563) is fixed on the side plate (562), and a lower guide plate (564) is provided in cooperation with the front guide plate (563). The lower guide plate (564) is used to be fixed to the lawn mower assembly (2).

6. The automatic attachment mechanism for a mid-mounted lawn mower according to claim 2, characterized in that: The hook (7) is provided with a side guide plate (565) for being fixedly mounted on the lawn mower assembly (2), and the side guide plate (565) is used to cooperate and guide the middle hook assembly (5).

7. An automatic coupling mechanism for a mid-mounted lawn mower according to any one of claims 1 to 6, characterized in that: The hooking mechanism further comprises two upper plates (71) arranged at intervals, and the upper plates (71) are used for being detachably connected to the lawn mower assembly (2).

8. The automatic attachment mechanism for a mid-mounted lawn mower according to claim 7, characterized in that: The mid-mounted lawn mower automatic attachment mechanism further comprises a guide curved beam (72) located between the two upper vehicle plates (71), the guide curved beam (72) being used for being detachably connected to the lawn mower assembly (2), and the guide curved beam (72) being close to one of the upper vehicle plates (71).

9. A mid-mounted lawn mower, characterized in that: It comprises an automatic coupling mechanism for a mid-mounted lawn mower as described in any one of claims 1 to 8.

10. A tractor, characterized in that: It includes a mid-mounted lawn mower as claimed in claim 9.

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