Middle mower connecting and operating mechanism, middle mower and tractor

Abstract

The utility model relates to a centrally-mounted mower connecting and operating mechanism, a centrally-mounted mower and a tractor, the centrally-mounted mower connecting and operating mechanism comprises: a front hooking assembly comprising a hook assembly and a front hooking assembly, the rear end of the hook assembly and the front end of the front hooking assembly are mutually hooked, and the rear end of the front hooking assembly is fixedly connected with a torsion spring; the middle and rear hitching assemblies comprise at least two middle hitching assemblies and at least two rear hitching assemblies, each middle hitching assembly comprises a seat plate and a lifting plate, and the lifting plates are used for supporting a universal joint transmission shaft connected to a tractor; the hooks are hung at the rear ends of the lifting plates; the mounting plate is rotationally connected with an adjusting seat, the adjusting seat is fixedly connected with an adjusting piece, the adjusting seat is provided with at least two steps, and the steps are supported below the rear hooking assembly. By the adoption of the technical scheme, the problem that in the prior art, only when a middle mower is matched with a tractor in model, the middle mower can be hung and used can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of lawn maintenance equipment, in particular to a mid-mounted lawn mower connection and operating mechanism, a mid-mounted 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 middle of the tractor is a non-standard interface machine, which needs to be designed with an interface matching with the tractor to perform the mowing operation of the mid-mounted lawn mower. In addition, most of the existing mid-mounted lawn mowers have the disadvantages of requiring manual attachment and / or the mowing height of the lawn mower is relatively fixed, which is inconvenient to use, limits the market scale, affects the user experience, and increases the user's cost. Utility Model Content

[0003] The utility model provides a center-mounted lawn mower connection and control mechanism, a center-mounted lawn mower and a tractor, which can improve the problem in the prior art that the center-mounted lawn mower can only be connected and used if the model of the tractor matches the center-mounted lawn mower, and can integrate functions such as connection of the center-mounted lawn mower to the tractor, lifting of the lawn mower, lowering of the lawn mower, adjustment of the cutting height gear, and automatic connection of the lawn mower drive shaft.

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

[0005] In the first aspect, the utility model provides a connection and control mechanism for a mid-mounted lawn mower, including: a front hitch assembly, including a hook assembly at the front end for fixedly connecting to a tractor and a front hitch assembly at the rear end for rotatably connecting to the front end of the lawn mower assembly, the rear end of the hook assembly and the front end of the front hitch assembly are hung with each other, and the rear end of the front hitch assembly is fixedly connected with a torsion spring for fixedly connecting to the front end of the lawn mower assembly; a mid-rear hitch assembly, including at least two mid-hook assemblies and a rear hitch assembly at the rear end for transmission connection to the lifter assembly of the tractor, the mid-hook assembly including a seat plate at the upper end for fixedly connecting to the tractor and a lift plate at the front end rotatably connected to the lower end of the seat plate, the The front end of the rear hitch assembly is simultaneously rotatably connected to a plurality of lifting plates, and the lifting plates are used to support a universal joint drive shaft connected to the tractor; a hook is used to be fixedly connected to the rear end of the lawn mower assembly, and at least two hooks are provided, and each of the hooks is connected one by one to the rear end of each lifting plate, and the connection point is located behind the rotation connection point between the rear hitch assembly and the lifting plate; and a mounting plate is used to be fixedly connected to the tractor, and the mounting plate is rotatably connected to an adjustment seat, and the adjustment seat is fixedly connected to an adjustment member for rotatably connecting to the tractor, and the adjustment seat is provided with at least two steps that are interconnected and located at different heights in sequence, and the steps are supported below the rear hitch assembly.

[0006] The beneficial effects of the utility model are as follows: the process of driving the tractor onto and off the stationary lawn mower assembly enables the hook assembly to be automatically hooked with the front end of the front hook assembly, and the lifting plate and the hook of the middle and rear hook assemblies are hooked with each other, and the universal joint transmission shaft and the transmission box installed on the lawn mower assembly automatically complete the hooking; and after the hooking is completed, the lifting power can be applied to the rear hook assembly through the lifter assembly to drive the rear end of the lawn mower assembly to be lifted upward, and the reaction force of the torsion spring is used to lift the front end of the lawn mower assembly upward, so that the lifting of the entire lawn mower assembly is completed; and during the lifting or After the lawn mower assembly is lowered to a certain height, the corresponding step can be supported under the rear mounting assembly of the center rear mounting assembly by rotating the adjusting piece, so as to support the rear mounting assembly, so that the lawn mower assembly is supported at different heights to meet the diversified needs of different cutting heights, improve the problem in the prior art that the center lawn mower can only be mounted and used if it matches the tractor model, and can integrate the functions of mounting the center lawn mower on the tractor, lifting the lawn mower, lowering the lawn mower, adjusting the cutting height gear, and automatically mounting the lawn mower drive shaft.

[0007] In a second aspect, the utility model provides a mid-mounted lawn mower, comprising the mid-mounted lawn mower connection and control mechanism.

[0008] In a third aspect, the utility model provides a tractor, comprising the above-mentioned mid-mounted lawn mower. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is an axonometric drawing of the utility model;

[0010] Figure 2 for Figure 1 A first partial structural schematic diagram of;

[0011] Figure 3 for Figure 1 A second partial structural schematic diagram;

[0012] Figure 4 for Figure 2 Enlarged view of part A in the middle;

[0013] Figure 5 for Figure 3 Enlarged view of middle part B;

[0014] Figure 6 for Figure 3 Enlarged view of the middle C part;

[0015] Figure 7 It is a schematic diagram of the first partial structure of the utility model;

[0016] Figure 8 for Figure 7Enlarged view of the middle D part;

[0017] Fig. 9 It is a partial structural schematic diagram of the central hitch assembly of the utility model;

[0018] Fig.10 It is a schematic diagram of the second partial structure of the utility model;

[0019] Fig.11 It is a schematic diagram of the third partial structure of the utility model;

[0020] Fig.12 for Fig.11 Enlarged view of the middle E part;

[0021] Fig.13 It is a top view of the local structure of the utility model;

[0022] Fig.14 It is a first partial structural sectional view of the utility model;

[0023] Fig.15 This is a front view of the installation of the adjustment seat of the utility model;

[0024] Fig.16 This is an installation axonometric drawing of the adjustment seat of the utility model;

[0025] Fig.17 It is a sectional view of the second local structure of the utility model.

[0026] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0027] 1. Lifter assembly;

[0028] 2. Lawn mower assembly; 21. Transmission box;

[0029] 3. front hitch assembly; 31. hook assembly; 311. hook portion; 32. front hitch assembly; 33. mounting shaft;

[0030] 4. Torsion spring;

[0031] 5. Middle hitch assembly; 51. Seat plate; 52. Lifting plate; 521. Notch; 53. Center shaft; 54. Limit plate; 55. Limit assembly; 551. Locking plate; 5511. Limit groove; 552. Limit 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;

[0032] 6. Rear hitch assembly; 61. Lifting rocker arm; 611. Rocker; 612. Eccentric shaft; 613. Fixing block; 614. Bolt; 615. Fixed outer pin; 62. Connecting rod assembly; 621. Short pull rod; 6211. Nut; 6212. Spacer; 622. Short rocker arm; 623. Transfer shaft; 624. Long rocker arm; 625. Long pull rod; 63. Lifting shaft; 64. Transmission unit; 641. Rocker arm; 642. Pull rod; 6421. Clamp; 6422. Pull rope;

[0033] 7. Hook; 71. Onboard plate; 72. Guide curved beam;

[0034] 10. Mounting plate; 101. Fixing bolt; 102. Ear plate;

[0035] 11. Universal joint drive shaft;

[0036] 12. Spline sleeve;

[0037] 13. Bearings;

[0038] 14. Gear ring;

[0039] 15. Positioning plate; 151. V-shaped plate;

[0040] 16. Right side plate connecting the rear axle of the gearbox; 161. Front floor;

[0041] 17. Adjusting seat; 171. Step; 172. Limiting surface;

[0042] 18. Adjusting member; 181. Adjusting rod; 182. Sealing seat; 183. Knob. DETAILED DESCRIPTION

[0043] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0044] It should be noted that if Figure 1 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) 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, and the output end of the power transmission component is transmission-connected to the cutting knife, 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 to complete the mowing operation.

[0045] Furthermore, a plurality of rollers are fixed to the lower end of the shell of the lawn mower assembly 2 to facilitate moving operations.

[0046] 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 drives onto the mower assembly 2 from the rear through the upper plate (not marked in the figure) on the mower assembly 2, until the front wheel passes and drives off the mower assembly 2. After driving off, the hook assembly 31 automatically connects with the front end of the front mounting assembly 32, and the lifting plate 52 and the hook 7 of the mid-rear mounting assembly are connected with each other. At the same time, the shaft head of the transmission box of the mower assembly 2 is simultaneously connected to the spline sleeve 12 of the universal joint transmission shaft 11, completing the automatic mounting cooperation. 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 drive to the mowing destination.

[0047] In a first aspect, the utility model provides a connection and control mechanism for a mid-mounted lawn mower, as described in detail below.

[0048] Example 1

[0049] like Figure 1-Figure 17 A mid-mounted lawn mower connection and operating mechanism includes a front hook assembly 3, a mid-rear hook assembly, a hook 7 and a mounting plate 10.

[0050] Specifically, the front mounting assembly 3 includes a front end hook component 31 for fixedly connecting to the tractor and a rear end front mounting component 32 for rotationally connecting to the front end of the lawn mower assembly 2. The rear end of the hook component 31 and the front end of the front mounting component 32 are connected to each other, and the rear end of the front mounting component 32 is fixedly connected to a torsion spring 4 for fixedly connecting to the front end of the lawn mower assembly 2.

[0051] The middle and rear hitch assembly includes at least two middle hitch assemblies 5 and a rear hitch assembly 6 whose rear end is used for transmission connection to the lifter assembly 1 of the tractor. The middle hitch assembly 5 includes a seat plate 51 whose upper end is used for fixed connection to the tractor and a lifting plate 52 whose front end is rotationally connected to the lower end of the seat plate 51. The front end of the rear hitch assembly 6 is rotationally connected to multiple lifting plates 52 at the same time, and the lifting plate 52 is used to support the universal joint transmission shaft 11 connected to the tractor.

[0052] The hook 7 is used to be fixedly connected to the rear end of the lawn mower assembly 2. At least two hooks are provided, and each hook 7 is connected to the rear end of each lifting plate 52 one by one. The connection point is located behind the rotation connection point between the rear connection assembly 6 and the lifting plate 52.

[0053] The mounting plate 10 is used for being fixedly connected to the tractor. The mounting plate 10 is rotatably connected to an adjusting seat 17. The adjusting seat 17 is fixedly connected to an adjusting member 18 for being rotatably connected to the tractor. The adjusting seat 17 is provided with at least two steps 171 which are interconnected and located at different heights in sequence. The steps 171 are supported below the rear hitch assembly 6.

[0054] The beneficial effects of this embodiment are as follows: by utilizing the process of the tractor driving on and off the stationary lawn mower assembly 2, the hook assembly 31 is automatically connected to the front end of the front hook assembly 32, and the lifting plate 52 of the middle and rear hook 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; and after the connection is completed, the lifting force can be applied to the rear hook assembly 6 through the lifter assembly 1 to drive the rear end of the lawn mower assembly 2 to be lifted upward, and the reaction force of the torsion spring 4 is used to lift the front end of the lawn mower assembly 2 upward, so that the entire lawn mower assembly 2 is lifted; After the lawn mower assembly 2 is lifted or lowered to a certain height, the corresponding step 171 can be supported under the rear mounting assembly 6 of the mid-rear mounting assembly by rotating the adjusting member 18, thereby supporting the rear mounting assembly 6, so that the lawn mower assembly 2 is supported at different heights to meet the diversified needs of different cutting heights. This improves the problem in the prior art that only mid-mounted lawn mowers can be mounted and used if they match the tractor model, and can integrate functions such as mounting the mid-mounted lawn mower on the tractor, lifting the lawn mower, lowering the lawn mower, adjusting the cutting height gear, and automatically mounting the lawn mower drive shaft.

[0055] The specific process is:

[0056] 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 assembly 31 and the middle and rear hook 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 assembly 31 is automatically connected to the front end of the front hook assembly 32, and the lifting plate 52 and the hook 7 of the middle and rear hook assembly 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 assembly 31 and the middle and rear hook assembly can be installed on the tractor, and there is no need to design the interface matching between the lawn mower assembly 2 and the tractor, so that different models of lawn mower assemblies 2 and tractors can be smoothly connected and used, and the connection operation of the universal joint drive shaft 11 and the transmission box 21 can be realized simultaneously.

[0057] When the lawn mower assembly 2 is lifted, the lifting device assembly 1 of the tractor is used to apply lifting power to the rear hitch assembly 6, so that the lifting plate 52 rotates around the rotation axis between the lifting plate 52 and the seat plate 51, driving the rear end of the lawn mower assembly 2 to lift upward. At the same time, under the action of the front hitch assembly 3 and the torsion spring 4, the reaction force of the torsion spring 4 is used to lift the front end of the lawn mower assembly 2 upward, completing the lifting of the entire lawn mower assembly 2, thereby ensuring that the lawn mower assembly 2 is relatively balanced after being lifted.

[0058] Similarly, when the lawn mower assembly 2 needs to be lowered, the rear hitch assembly 6 is controlled by the tractor's lifter assembly 1, so that the lift plate 52 rotates in the opposite direction around the rotation axis of the seat plate 51, driving the rear end of the lawn mower assembly 2 to move downward, and the reaction force of the torsion spring 4 causes the front end of the lawn mower assembly 2 to move downward;

[0059] After the lawn mower assembly 2 is lifted or lowered to a certain height, the corresponding step 171 can be supported under the rear hitch assembly 6 of the middle and rear hitch assembly by rotating the adjusting member 18, thereby supporting the rear hitch assembly 6; when it is necessary to adjust the height of the mid-mounted lawn mower, the adjusting member 18 is rotated to rotate the step 171 at a relatively low height position to the bottom of the rear hitch assembly 6, so that the lawn mower assembly 2 can be lowered under the action of its gravity, and the height is the height difference between the front and rear steps 171 supported under the lifting mechanism. The existing mid-mounted lawn mower cannot be adjusted in height, and cannot meet the technical problem of users' diverse needs for different cutting heights.

[0060] As a further use, after the mid-mounted lawn mower is lifted by the lifting mechanism, the adjusting seat 17 can be rotated so that a step 171 of a suitable height can support the mid-mounted lawn mower, forming a second support structure in addition to the lifting mechanism. In this way, when the tractor (such as a rear three-point suspension) is used for other operations, the step 171 can form a stable support for the lifting mechanism and the mid-mounted lawn mower.

[0061] When the mid-mounted mower needs to be lowered by the lifting mechanism, the adjusting seat 17 is first rotated to cancel the support structure of the mid-mounted mower indirectly provided by the step 171. In this way, when different steps 171 form support for the lifting mechanism, the mid-mounted mower can be placed at different heights to adjust the cutting height.

[0062] The hook assembly 31 is fixedly connected to the front bracket of the tractor.

[0063] The term “front end” is used in Figure 1 The left side is the front, and the “back end” is Figure 1 The 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.

[0064] The rear hitch assembly 6 is specifically connected to the left lifting arm of the lifter assembly 1 by transmission.

[0065] Based on the above embodiment, the at least two middle hitch assemblies 5 may be two, three, four, etc., and only two are shown in the figure, and are arranged perpendicular to Figure 1 Directional interval distribution in the middle and front-back direction.

[0066] The upper end of the seat plate 51 is fixed by bolts ( Figure 1 , Figure 3 The upper and lower ones are shown in the figure) and are fixedly connected to the tractor, specifically to the rear axle housing of the tractor's gearbox.

[0067] like Figure 1 , Figure 3 as well as Figure 5 On the basis of the above embodiment, the lower end of the seat plate 51 is rotatably connected with a central shaft 53, and the central shaft 53 includes a bolt and a sleeve sleeved on the bolt rod. The bolt and the sleeve are simultaneously passed through the lower end of the seat plate 51 and the front end of the lifting plate 52 to complete the connection between the seat plate 51 and the lifting plate 52, and the lifting plate 52 can be rotated relative to the seat plate 51 with the central shaft 53 as the center axis.

[0068] Based on the above embodiment, each lifting plate 52 has a gap with the top of the lawn mower assembly 2 to prevent the two from colliding.

[0069] A limiting plate 54 is provided below the front end of each lifting plate 52 for fixing to the upper side of the front end of the lawn mower assembly 2, and the upper end of the limiting plate 54 faces the lifting plate 52 to form a limit between the lifting plate 52 and the lawn mower assembly 2 to prevent the two from colliding.

[0070] 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 .

[0071] 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.

[0072] 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.

[0073] like Figure 1 , Figure 3 Furthermore, two spaced-apart upper plates 71 are detachably connected to the lawn mower assembly 2, so that the tractor can drive onto the lawn mower assembly 2 through the upper plates 71, so that the front wheels of the tractor can pass through and drive off the lawn mower assembly 2.

[0074] A guide curved beam 72 is provided 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. When the front wheel of the tractor passes through and drives off the lawn mower assembly 2, the guide curved beam 72 can form a barrier to the wheel, 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.

[0075] 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.

[0076] Carriage plates fixedly connected to the lawn mower assembly 2 are provided in front and rear of the upper car plate 71 to form a passage for the lawn mower assembly 2 to be mounted on and off the tractor.

[0077] like Figure 3 , Figure 15-17 On the basis of the above embodiment, the mounting plate 10 is fixedly connected to the right side plate 16 of the rear axle of the tractor's gearbox by means of the fixing bolts 101. Specifically, the mounting plate 10 is in an "L" shape as a whole, one end of which is fixedly connected to the right side plate 16 of the rear axle of the tractor's gearbox by means of the fixing bolts 101, and the other end extends transversely to realize the rotational connection to the adjustment seat 17, and the adjustment seat 17 is rotationally connected to the upper side of the other end thereof.

[0078] In the embodiment of the present invention, the steps 171 may be two, three, four, five, six, seven, eight, etc. The steps 171 may be arranged in a ring shape (see Figure 4 ), can also be arranged on the same straight line, as long as it is located below the rocker arm 641 of the lifting mechanism after rotation.

[0079] The fixing bolt 101 may be a M14×35 bolt and is provided with a gasket.

[0080] Based on the above embodiment, the adjustment seat 17 is a stepped cylindrical structure, and the small diameter end realizes the rotational installation of the adjustment seat 17 and the mounting plate 10 through the bearing 13; specifically, the mounting plate 10 is fixed with the bearing 13, the outer ring of the bearing 13 is fixedly connected to the mounting plate 10, and the inner ring is fixedly connected to the adjustment seat 17. The bearing 13 can be a deep groove ball bearing.

[0081] The adjusting member 18 comprises an adjusting rod 181 fixedly connected to the adjusting seat 17 and a sealing seat 182 rotatably connected to the adjusting rod 181, wherein the sealing seat 182 is used to be fixedly connected to the tractor. The sealing seat 182 forms a mounting base for the adjusting rod 181 and ensures that the adjusting rod 181 can be smoothly rotated.

[0082] The adjusting rod 181 is vertically arranged, and its lower end is fixedly connected to the adjusting seat 17, and its upper end can be rotatably connected to the sealing seat 182 through a bearing (not shown in the figure). The sealing seat 182 can be fixedly connected to the tractor front floor 161 through bolts.

[0083] One end of the adjusting rod 181 away from the adjusting seat 17 is provided with a knob 183, and the knob 183 is used to be installed on the upper side of the tractor front floor. So that the driver in the cab rotates the adjusting rod 181 by the knob 183 to realize the rotation of the adjusting seat 17.

[0084] The knob 183 may be made of rubber.

[0085] Based on the above embodiment, the knob 183 includes a fixing tube threadedly connected to the upper end of the adjusting rod 181 and a rubber block fixed to the fixing tube. The threaded connection between the fixing tube and the adjusting rod 181 is used to achieve a detachable connection for easy installation.

[0086] Furthermore, a limit nut is threadedly connected to the upper end of the adjusting rod 181 , and the limit nut is located at the lower side of the fixing tube, so that the length of the threaded connection between the fixing tube and the adjusting rod 181 is limited by the limit nut.

[0087] As one of the specific schemes of this embodiment, seven steps 171 are provided, and the height difference between two adjacent steps 171 is 25.4 mm, and the rotation angle between two adjacent steps 171 relative to the rotation axis of the adjusting member 18 is 25°; by providing seven steps 171, when different steps 171 support the lifting mechanism, the mid-mounted lawn mower can be placed at different heights therein, thereby realizing diversified adjustment of the cutting height.

[0088] When the mid-mounted mower is lowered and the stubble height adjustment mechanism is engaged, the adjustment knob 183 ( Figure 2 (shown as clockwise), for every 25° rotation of the adjustment seat 17 assembly, the step 171 located below the rocker arm 641 of the lifting mechanism is lowered by 25.4 mm, and at the same time, under the gravity of the mid-mounted mower, the rocker arm 641 falls down and contacts the step 171, thereby changing the mowing height of the mid-mounted mower. When the operation is completed, the mower is lifted to the highest position through the lifting mechanism, and the adjustment knob 183 is reversely rotated to reset to support the rocker arm 641 and support it at a high position.

[0089] Through the above adjustment method, the height can be adjusted within the range of 0-150mm. There are seven gears, 1 is the lowest gear, 150 is the transport gear, the highest gear is convenient for transport, and there is a 25.4mm gear in the middle, which is the cutting height gear. The cutting height is 25.4-127mm, which is achieved by controlling the lifting mechanism of the mid-mounted mower.

[0090] Based on the above embodiment, the adjustment seat 17 is further provided with a limiting surface 172, which is opposite to the lowest step 171. When the adjustment seat 17 rotates and the lowest step 171 supports the lifting mechanism, the limiting surface 172 can limit the lifting mechanism to prevent the lifting mechanism from detaching from the adjustment seat 17.

[0091] Example 2

[0092] like Figure 3 , Figure 7 as well as Figure 8 On the basis of Example 1, the rear hitch assembly 6 includes a lifting rocker arm 61 at the rear end for transmission connection to the lifter assembly 1 of the tractor, a connecting rod assembly 62 at the rear end detachably connected to the front end of the lifting rocker arm 61, a lifting shaft 63 for rotation connection to the tractor, and at least two transmission units 64 fixedly connected to the lifting shaft 63, the number of transmission units 64 is equal to the number of lifting plates 52 and is arranged one by one, the rear end of one transmission unit 64 is rotated at the front end of the connecting rod assembly 62, and the rear end of one transmission unit 64 is supported by the step 171, and the front end of the transmission unit 64 is rotationally connected to the corresponding lifting plate 52.

[0093] The beneficial effect of adopting the preferred scheme in the above embodiment is that the lifting power is applied to the rear hitch assembly 6 by using the lifter assembly 1 of the tractor, so that the lifting plate 52 rotates around the rotation axis between it and the seat plate 51, and the rear end of the lawn mower assembly 2 is driven to lift upward. The lifter assembly 1 of the tractor applies power to the lifting rocker arm 61, and the power is transmitted by the connecting rod assembly 62. The transmission unit 64 and the lifting shaft 63 rotate at the same time with the central axis of the lifting shaft 63 as the axis, so that the lifting plate 52 rotates around the rotation axis between it and the seat plate 51 through the transmission unit 64, and the rear end of the lawn mower assembly 2 is driven to lift upward.

[0094] Based on the above embodiment, the lifting rocker arm 61 includes a rocker 611 at the rear end for transmission connection to the lifter assembly 1 of the tractor and an eccentric shaft 612 with one end rotatably connected to the front end of the rocker 611, and the other end of the eccentric shaft 612 is detachably connected to the rear end of the connecting rod assembly 62.

[0095] The tractor's lifter assembly 1 applies power to the rocker 611, causing the rocker 611 to rotate, driving the eccentric shaft 612 to rotate, causing the rear end of the connecting rod assembly 62 to move in the vertical direction to be transmitted to the transmission unit 64, causing the lifting plate 52 to rotate around the rotation axis between it and the seat plate 51.

[0096] The rotation axes of the rocker 611 and the eccentric shaft 612 do not coincide, one end of the eccentric shaft 612 passes through a hole reserved at the end of the rocker 611 , and a nut is threadedly connected to the end to achieve the connection between the rocker 611 and the eccentric shaft 612 .

[0097] On the basis of the above embodiment, the lifting rocker arm 61 further includes a fixing block 613 , and the rocker rod 611 is rotatably connected to the outer side of the fixing block 613 .

[0098] As one of the specific solutions of the above embodiment, the fixing block 613 is welded to or integrally formed on the left lifting arm of the lifter assembly 1 to form an integral structure, thereby eliminating the installation steps.

[0099] As a second specific solution of the above embodiment, the fixing block 613 is detachably connected to the left lifting arm of the lifter assembly 1 through a bolt 614 and / or a fixed outer pin 615, so as to reduce the cost of the user who does not install the lawn mower assembly 2 and improve the market share. Among them, two bolts 614 are arranged at intervals.

[0100] Based on the above embodiment, the connecting rod assembly 62 includes a short pull rod 621 whose rear end is detachably connected to the front end of the lifting rocker arm 61, a short rocker arm 622 whose rear end is rotatably connected to the front end of the short pull rod 621, a rotating shaft 623 whose rear end is fixedly connected to the front end of the short rocker arm 622, a long rocker arm 624 whose rear end is fixedly connected to the front end of the rotating shaft 623, and a long pull rod 625 whose rear end is rotatably connected to the front end of the long rocker arm 624. The rotating shaft 623 is used to be rotatably installed on the tractor, and the front end of the long pull rod 625 is rotated at the rear end of one of the transmission units 64.

[0101] During lifting, the short pull rod 621 moves upward, the rotating shaft 623 rotates, the short rocker arm 622 and the long rocker arm 624 rotate around the center axis of the rotating shaft 623 at the same time, pulling the long pull rod 625, so that the transmission unit 64 rotates, thereby realizing the rotation of the lifting plate 52 around the rotation axis between it and the seat plate 51.

[0102] The rear end of the short pull rod 621 is provided with an external thread, and the front end of the eccentric shaft 612 is provided with a through hole. The rear end of the short pull rod 621 passes through the through hole and is threadedly connected with multiple nuts 6211. A spacer sleeve 6212 is also provided between the nut 6211 close to the eccentric shaft 612 and the eccentric shaft 612 to limit the use length of the short pull rod 621 by the screwing length of the nut 6211, and use the spacer sleeve 6212 to reduce friction.

[0103] In the above embodiment, the lengths of the eccentric shaft 612 and the short rocker arm 622 are equal, which may be 33 mm; and the length of the long rocker arm 624 may be 58 mm.

[0104] Based on the above embodiment, a U-shaped clamp is provided at the rear end of the long pull rod 625, and a rotating shaft is provided at the open end of the U-shaped clamp, which is rotatably connected to the front end of the long rocker arm 624 (shown as the lower end of the long rocker arm 624 in the figure).

[0105] A U-shaped clamp is also provided at the front end of the long pull rod 625, and a rotating shaft is provided at the open end of the U-shaped clamp, which is rotatably connected to the long pull rod 625, and a T-shaped shaft is fixed to the rear end of one of the transmission units 64, and the T-shaped shaft rotates and slides in the U-shaped clamp.

[0106] Specifically, during lifting, the rocker arm 611 drives the eccentric shaft 612 to rotate counterclockwise, the short pull rod 621 moves upward, the short rocker arm 622 and the long rocker arm 624 rotate counterclockwise around the center axis of the rotating shaft 623 at the same time, and the counterclockwise rotating long rocker arm 624 pulls the long pull rod 625 to move relatively backward and upward, and the long pull rod 625 pulls the transmission unit 64 to rotate.

[0107] When the step 171 supports the rocker arm 641 of the transmission unit 64, the tractor's lifter assembly 1 is used to apply lifting power to the rear hitch assembly 6, and a reverse force is applied to the lifting rocker arm 61. Under the transmission of the long pull rod 625, the T-shaped shaft will slide in the U-shaped clamp, so that the long pull rod 625 will not drive the lifting rocker arm 61 to perform corresponding actions.

[0108] Example 3

[0109] like Figure 3 , Figure 5-Figure 8 On the basis of Examples 1 and 2, the transmission unit 64 includes at least two rocker arms 641 and at least two pull rods 642 which are arranged one-to-one on each rocker arm 641. The number of rocker arms 641 is equal to the number of lifting plates 52 and is arranged one-to-one. The rear end of one rocker arm 641 is rotated on the front end of the connecting rod assembly 62, and the rear end of one rocker arm 641 is supported by the step 171. Each rocker arm 641 is fixedly connected to the lifting shaft 63, the rear end of the pull rod 642 is rotatably connected to the front end of the rocker arm 641, and the front end of the pull rod 642 is rotatably connected to the lifting plate 52.

[0110] The beneficial effect of adopting the preferred scheme in the above embodiment is that when the lifting plate 52 is rotated around the rotation axis between it and the seat plate 51 by utilizing the transmission unit 64, the rocker arm 641 and the lifting shaft 63 simultaneously rotate around the central axis of the lifting shaft 63, so that the pull rod 642 drives the lifting plate 52 to rotate around the rotation axis between it and the seat plate 51, and the rear end of the lawn mower assembly 2 is lifted upward.

[0111] As a specific solution of the above embodiment, two rocker arms 641 and two pull rods 642 are provided, and the rear end of one of the rocker arms 641 is rotated and slidably connected to the U-shaped clip at the front end of the long pull rod 625 through a T-shaped shaft.

[0112] The middle end of the rocker arm 641 is sleeved on the rod end of the lifting shaft 63 and is limited by a latch to keep the rocker arm 641 and the lifting shaft 63 relatively still.

[0113] Based on the above embodiment, the pull rod 642 includes two splints 6421 and a pull rope 6422. One ends of the two splints 6421 are simultaneously rotatably connected to the front end of the rocker arm 641 and are limited by a pin; the upper end of the pull rope 6422 is wrapped around and fixed to the rotating shaft at the other end of the two splints 6421, and the lower end of the pull rope 6422 is rotatably connected to the lifting plate 52. Specifically, the lifting plate 52 is rotatably connected to a rotating part, and the lower end of the pull rope 6422 is fixedly connected to one end of the rotating part.

[0114] Through the pulling of the connecting rod assembly 62, the rocker arm 641 and the lifting shaft 63 are smoothly rotated at the same time with the central axis of the lifting shaft 63 as the axis. In the figure, when the long rocker arm 624 rotating counterclockwise pulls the long pull rod 625 to move relatively backward and upward, the long pull rod 625 pulls the rocker arm 641 to rotate counterclockwise.

[0115] Specifically, a sleeve is fixed at the angle of the rocker arm 641, and the two ends of the lifting shaft 63 extend into the two sleeves respectively, and are fixed to the sleeves by pins at the same time, so as to realize the fixed connection between the rocker arm 641 and the lifting shaft 63.

[0116] Specifically, refer to Figure 3 and Fig.15 One of the rocker arms 641 is rotated and slidably connected to the U-shaped clip at the front end of the long pull rod 625 through a T-shaped shaft. The rear end of the other rocker arm 641 is bent forward and overlapped on the step 171.

[0117] Example 4

[0118] like Figure 3 , Figure 5 , Figure 6 as well as Fig. 9 On the basis of embodiments 1-3, each lifting plate 52 is provided with a notch 521 for matching with the hanging hook 7.

[0119] The beneficial effect of adopting the preferred solution in the above embodiment is that when the middle and rear hitch assembly and the hook 7 are hooked to each other, as the tractor moves, the hook 7 on the mower assembly 2 enters the slot 521 to achieve hooking.

[0120] The slot 521 opens toward the direction where the front hanging assembly 32 is located.

[0121] Example 5

[0122] like Figure 3 , Figure 5 , Figure 6 as well as Fig. 9On the basis of embodiments 1-4, a limiting assembly 55 is installed at the rear end of each lifting plate 52, and two sockets 554 are provided. The limiting assembly 55 includes a locking plate 551 rotatably connected to the lifting plate 52 at the middle end, a limiting pin 552 inserted in the lifting plate 52, and a pin 553 inserted into one of the sockets 554. The limiting pin 552 abuts against the upper side of the front end of the locking plate 551, and the socket 554 close to the limiting pin 552 is located on the upper side of the rear end of the locking plate 551, and the other socket 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 slot 521.

[0123] The beneficial effect of adopting the preferred scheme in the above embodiment is that before the lifting plate 52 and the hook 7 are hooked to each other, the pin 553 is inserted into the other socket 554, and then the hooking is performed. During the hooking process, the locking plate 551 is rotated counterclockwise by the collision of the hook 7 until the hook 7 enters the slot 521. After the hooking action of the lifting plate 52 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.

[0124] The middle end of the locking plate 551 is rotatably connected to the lifting plate 52 of the middle hook assembly 5 through a combined structure of bolts and sleeves.

[0125] The other socket 554 is specifically located behind the first socket 554 .

[0126] 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.

[0127] Example 6

[0128] like Figure 3 , Figure 10-Figure 14 On the basis of embodiments 1-5, each lifting plate 52 is fixedly connected to a bending beam 56, the bending beam 56 is fixedly connected to a connecting plate 561, and the connecting plate 561 is detachably connected to a side plate 562 for supporting a spline sleeve 12 of a universal joint transmission shaft 11.

[0129] 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.

[0130] In the figure, two lifting plates 52 are shown, and the two ends of the bending beam 56 are respectively fixed to the rear ends of the two lifting plates 52. 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.

[0131] 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 .

[0132] Based on the above embodiment, 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 mower assembly 2. 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 mower assembly 2 are accurately connected.

[0133] 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.

[0134] Based on the above embodiment, a side guide plate 565 is provided in the hook 7 for fixed installation on the lawn mower assembly 2, and the side guide plate 565 is used to cooperate with and guide the middle hook assembly 5; during the hooking process, the side guide plate 565 guides the advancement of the front middle hook assembly 5 to ensure that the front middle hook assembly 5 and the hook 7 are accurately hooked.

[0135] 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.

[0136] Example 7

[0137] like Figure 1-Figure 4 On the basis of embodiments 1-6, the rear end of the hook component 31 is bent forward to form a hook portion 311, and the front end of the front hanging component 32 is tilted upward to form a hanging portion that cooperates with the hook portion 311 for hanging.

[0138] The beneficial effect of adopting the preferred solution in the above embodiment is that, during the hooking process, the hook portion 311 moves toward the hooking portion as the tractor moves forward, and finally completes the hooking with the hooking portion.

[0139] The rear end of the front hitch assembly 32 extends horizontally backward to form two rods, and the two rods are used to be rotatably connected to the front end of the lawn mower assembly 2 .

[0140] Based on the above embodiment, the rear end of the front hitch assembly 32 is rotatably connected to a mounting shaft 33 for fixedly connecting to the front end of the lawn mower assembly 2 , and the other end of the torsion spring 4 is sleeved and fixedly connected to the mounting shaft 33 .

[0141] When the rear end of the lawn mower assembly 2 is lifted upward, the torsion spring 4 generates torque, so that the front end of the lawn mower assembly 2 is lifted upward, completing the lifting of the entire lawn mower assembly 2, thereby ensuring that the lawn mower assembly 2 remains relatively balanced after being lifted.

[0142] Specifically, the rear end of the front hanging assembly 32 extends horizontally backward to form two rod portions, and the two rod portions are rotatably connected to the two ends of the installation shaft 33 respectively.

[0143] When the rear end of the lawn mower assembly 2 moves upward, the angle between the lawn mower assembly 2 and the horizontal front hitch assembly 32 changes from a straight angle to an obtuse angle, and the torsion spring 4 generates a torsion force to make the lawn mower assembly 2 horizontal.

[0144] Example 8

[0145] like Figure 3 , Figure 15-17 On the basis of embodiments 1-7, a gear ring 14 is circumferentially fixed to the adjustment seat 17, and the mounting plate 10 is detachably connected to a positioning plate 15, which is an elastic plate, and one end of which is detachably connected to the mounting plate 10, and the other end cooperates with the gear ring 14.

[0146] The beneficial effect of adopting the preferred solution in the above embodiment is that the adjustment seat 17 is limited by the cooperation of the gear ring 14 and the elastic positioning plate 15 to prevent it from rotating, so that the adjustment seat 17 forms a stable support for the lifting mechanism.

[0147] As a specific solution of the above embodiment, the toothed ring 14 is integrally formed at the lower end of the large diameter end of the adjustment seat 17 and abuts against the upper side of the other end of the mounting plate 10. The toothed ring 14 can be a complete toothed ring or an incomplete toothed ring (such as Fig.17 shown).

[0148] Based on the above embodiment, a lug plate 102 is extended from one end of the mounting plate 10, and one end of the positioning plate 15 is connected to the lug plate 102 by bolts to achieve installation. The positioning plate 15 can be made of spring steel.

[0149] Based on the above embodiment, a V-shaped plate 151 adapted to and entering into the tooth groove of the gear ring 14 is formed at the other end of the positioning plate 15 .

[0150] Through the two inclined surfaces of the V-shaped plate 151 , when the adjusting seat 17 is rotated by the adjusting member 18 , the elastic force of the positioning plate 15 can be overcome, so that the V-shaped plate 151 can freely enter and exit the tooth groove of the gear ring 14 .

[0151] In a second aspect, the utility model further provides a mid-mounted lawn mower, as described in detail below.

[0152] Example 9

[0153] A mid-mounted lawn mower, based on embodiments 1-8, comprises the mid-mounted lawn mower connection and control mechanism.

[0154] In a second aspect, the utility model also provides a tractor, as described in detail below.

[0155] Example 10

[0156] Based on embodiments 1-9, a tractor includes the mid-mounted lawn mower.

[0157] 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.

[0158] 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.

[0159] 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.

[0160] 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.

[0161] 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.

[0162] 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. A connection and control mechanism for a mid-mounted lawn mower, characterized in that: include: A front hook assembly (3) comprises a hook assembly (31) at a front end for fixedly connecting to a tractor and a front hook assembly (32) at a rear end for rotatably connecting to a front end of a lawn mower assembly (2), wherein the rear end of the hook assembly (31) and the front end of the front hook assembly (32) are connected to each other, and the rear end of the front hook assembly (32) is also fixedly connected to a torsion spring (4) for fixedly connecting to the front end of the lawn mower assembly (2); A middle and rear hitch assembly comprises at least two middle hitch assemblies (5) and a rear hitch assembly (6) whose rear end is used for transmission connection to a lifter assembly (1) of a tractor, wherein the middle hitch assembly (5) comprises a seat plate (51) whose upper end is used for fixed connection to the tractor and a lift plate (52) whose front end is rotationally connected to the lower end of the seat plate (51), and the front end of the rear hitch assembly (6) is rotationally connected to a plurality of lift plates (52) at the same time, and the lift plate (52) is used for supporting a universal joint transmission shaft (11) connected to the tractor; A hook (7) for fixedly connecting to the rear end of the mower assembly (2), at least two hooks (7) are provided, and each of the hooks (7) is connected to the rear end of each of the lifting plates (52), and the connection point is located behind the rotation connection point between the rear connection assembly (6) and the lifting plate (52); and a mounting plate (10) for fixedly connecting to a tractor, wherein the mounting plate (10) is rotatably connected to an adjusting seat (17), the adjusting seat (17) is fixedly connected to an adjusting member (18) for rotatably connecting to the tractor, and the adjusting seat (17) is provided with at least two steps (171) which are connected to each other and are located at different heights in sequence, and the steps (171) are supported below the rear hitch assembly (6).

2. A mid-mounted lawn mower connection and control mechanism according to claim 1, characterized in that: The rear hitch assembly (6) comprises a lifting rocker arm (61) for transmission connection to a tractor's lifting device assembly (1) at the rear end, a connecting rod assembly (62) detachably connected to the front end of the lifting rocker arm (61) at the rear end, a lifting shaft (63) for rotationally connecting to the tractor, and at least two transmission units (64) fixedly connected to the lifting shaft (63), the number of the transmission units (64) being equal to the number of the lifting plates (52) and being arranged one by one, the rear end of one of the transmission units (64) being rotated to the front end of the connecting rod assembly (62), and the rear end of one of the transmission units (64) being supported by the step (171), and the front end of the transmission unit (64) being rotationally connected to the corresponding lifting plate (52).

3. A mid-mounted lawn mower connection and control mechanism according to claim 2, characterized in that: The transmission unit (64) includes at least two rocker arms (641) and at least two pull rods (642) which are arranged in a one-to-one correspondence on each of the rocker arms (641). The number of the rocker arms (641) is equal to the number of the lifting plates (52) and they are arranged in a one-to-one correspondence. The rear end of one of the rocker arms (641) is rotated on the front end of the connecting rod assembly (62), and the rear end of one of the rocker arms (641) is supported by the step (171). Each of the rocker arms (641) is fixedly connected to the lifting shaft (63), the rear end of the pull rod (642) is rotationally connected to the front end of the rocker arm (641), and the front end of the pull rod (642) is rotationally connected to the lifting plate (52).

4. A mid-mounted lawn mower connection and control mechanism according to any one of claims 1 to 3, characterized in that: Each lifting plate (52) is provided with a notch (521) for cooperating with and hanging the hook (7).

5. A mid-mounted lawn mower connection and control mechanism according to claim 4, characterized in that: A limiting assembly (55) is installed at the rear end of each lifting plate (52), and each of the limiting assemblies (55) is provided with two insertion holes (554). The limiting assembly (55) comprises a locking plate (551) rotatably connected to the lifting plate (52) at the middle end, a limiting pin (552) inserted in the lifting plate (52), and a plug (553) inserted into one of the insertion holes (554). The limiting pin (552) abuts against the upper front end of the locking plate (551), and the insertion hole (554) close to the limiting pin (552) is located at the upper 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).

6. A mid-mounted lawn mower connection and control mechanism according to claim 4, characterized in that: Each lifting plate (52) is fixedly connected to a bending beam (56), and the bending beam (56) is fixedly connected to a connecting plate (561). 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).

7. A mid-mounted lawn mower connection and control mechanism according to any one of claims 1 to 3, characterized in that: The rear end of the hook assembly (31) is bent forward to form a hook portion (311), and the front end of the front hanging assembly (32) is tilted upward to form a hanging portion that cooperates with the hook portion (311) for hanging.

8. A mid-mounted lawn mower connection and control mechanism according to any one of claims 1 to 3, characterized in that: The adjusting seat (17) is circumferentially fixed with a toothed ring (14); the mounting plate (10) is detachably connected with a positioning plate (15); the positioning plate (15) is an elastic plate, one end of which is detachably connected to the mounting plate (10) and the other end of which is matched with the toothed ring (14).

9. A mid-mounted lawn mower, characterized in that: It comprises a mid-mounted lawn mower connection and control mechanism as described in any one of claims 1-8.

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

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