Three-point type connecting device of tractor

Abstract

The utility model belongs to the technical field of tractor connecting devices, and relates to a tractor three-point type connecting device which comprises an upper cross beam, two groups of cable-stayed beams and a lower cross beam which are used for forming a frame structure, and the tops of the two groups of cable-stayed beams are fixedly connected with the two ends of the upper cross beam respectively. The bottoms of the two sets of cable-stayed beams are fixedly connected with the two ends of the lower cross beam respectively, the middle of the upper cross beam and the two ends of the lower cross beam are fixedly provided with suspension connecting assemblies respectively, and the suspension connecting assemblies are located on the front side of the frame structure and comprise fixing parts and dismounting parts. A plurality of groups of dismounting parts with different specifications can be prefabricated in advance, so that the three-point type connecting device can be matched with most tractors on the market, and when the operating mechanism needs to be connected to the tractors with different models for use, only the bolts need to be dismounted, the dismounting parts matched with pin holes in the connecting ends of the tractors are replaced, and the operation is convenient. And the operation mechanism and the tractor can be replaced and mounted quickly, disassembly and assembly are convenient, and the applicability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of tractor connection devices, and particularly relates to a three-point connection device for tractors. Background Art

[0002] With the improvement of agricultural automation and intelligence, more and more intelligent equipment is applied to agricultural production. As a commonly used agricultural traction device, a tractor usually has a connection end at its rear, and agricultural operation mechanisms such as rotary tillage, seeding, and fertilizing are connected through a three-point suspension connection device.

[0003] Due to the diversification of agricultural tractor models on the current market, there are significant differences in the specifications, sizes, etc. of the connection ends at the rear of tractors, and the types and functions of agricultural operation mechanisms are diverse. In the field of large-scale agricultural planting technology, there are often situations where agricultural operation mechanisms with various functions need to be matched with different models of tractors. However, due to the mismatch between the connection ends at the rear of tractors and the agricultural operation mechanisms, it is impossible to connect and install for operation, which affects the agricultural operation efficiency. Summary of the Invention

[0004] The purpose of the utility model is to provide a three-point connection device for tractors that is convenient and quick to disassemble, replace, and has high applicability.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a three-point connection device for tractors, including an upper cross beam, diagonal tension beams, and a lower cross beam for forming a frame structure. There are two groups of diagonal tension beams. The tops of the two groups of diagonal tension beams are respectively fixedly connected to the two ends of the upper cross beam, and the bottoms of the two groups of diagonal tension beams are respectively fixedly connected to the two ends of the lower cross beam. Suspension connection components are respectively fixedly installed in the middle of the upper cross beam and at the two ends of the lower cross beam, and the suspension connection components are all located on the front side of the frame structure.

[0006] Further, the suspension connection component includes a fixing part and a disassembling part. The fixing part includes a welding plate welded to the front sides of the upper cross beam and the lower cross beam. A reinforcing rib plate is connected to the back of the welding plate, and the reinforcing rib plate is welded and fixed to the upper cross beam and the lower cross beam. A number of bolt holes are evenly distributed on the welding plate.

[0007] Further, the disassembling part includes a fixing plate for movably connecting with the welding plate and two groups of pin hole plates vertically installed on the front side of the fixing plate. The fixing plate is provided with bolt holes corresponding to those on the welding plate. The fixing plate and the welding plate are detachably connected by bolts. The pin hole plates are symmetrically provided with pin holes, and a pin shaft is inserted into the pin holes. The pin shaft is used for connecting and fixing with the pin holes of the connection end on the tractor.

[0008] Further, the two groups of pin hole plates are symmetrically and vertically arranged, the pin hole plates are welded and fixed to the fixing plate, and the pin holes and pin shafts on the pin hole plates are adapted to the connection end on the tractor.

[0009] Furthermore, the frame structure composed of the upper cross beam, the stay beam and the lower cross beam is in the shape of an isosceles trapezoid that is narrower at the top and wider at the bottom, and the stay beam is connected to the upper cross beam and the lower cross beam by welding.

[0010] Furthermore, a bending portion is provided at the lower end of the stay beam, and the bending portion is used for welding and fixing with the end of the lower cross beam.

[0011] Furthermore, the rear side of the lower cross beam is welded and fixed to the working mechanism to be connected to the tractor.

[0012] The utility model has the following beneficial effects: The three-point connection device of the tractor of the utility model can prefabricate multiple groups of disassembly parts with different specifications in advance, so that the three-point connection device of the utility model can match the vast majority of tractors on the market. When the working mechanism needs to be connected to different models of tractors for use, only the bolt needs to be removed and the disassembly part matching the pin hole at the connection end of the tractor is replaced, and the replacement installation of the working mechanism and the tractor can be quickly completed. The disassembly and assembly are convenient, the applicability is high, and the disassembly and replacement efficiency of the working mechanism and the tractor is improved. Description of the Drawings

[0013] Figure 1 is the three-dimensional overall structure of the three-point connection device of the tractor of the utility model Figure 1 .

[0014] Figure 2 is the three-dimensional overall structure of the three-point connection device of the tractor of the utility model Figure 2 .

[0015] Figure 3 is the front view of the three-point connection device of the tractor of the utility model.

[0016] Figure 4 is Figure 3 the sectional view taken along the line A-A in

[0017] Figure 5 is the rear view of the three-point connection device of the tractor of the utility model.

[0018] Figure 6 is the top view of the three-point connection device of the tractor of the utility model.

[0019] Figure 7 is Figure 6 the sectional view taken along the line B-B in

[0020] In the figure, 1. upper cross beam, 2. stay beam, 3. lower cross beam, 4. suspension connection assembly;

[0021] 21. bending portion;

[0022] 41. Reinforcing rib plate, 42. Fixed plate, 43. Pin hole plate, 44. Pin hole, 45. Pin shaft, 46. Bolt, 47. Welding plate. Detailed implementation mode

[0023] Now, the present utility model will be further described in detail with reference to the accompanying drawings.

[0024] As Figure 1 shown, a three-point hitch device for a tractor includes an upper cross beam 1, a diagonal beam 2 and a lower cross beam 3 for forming a frame structure. There are two groups of diagonal beams 2. The tops of the two groups of diagonal beams 2 are respectively fixedly connected to the two ends of the upper cross beam 1, and the bottoms of the two groups of diagonal beams 2 are respectively fixedly connected to the two ends of the lower cross beam 3. Suspension connection assemblies 4 are respectively fixedly installed in the middle of the upper cross beam 1 and at the two ends of the lower cross beam 3. The suspension connection assemblies 4 are all located on the front side of the frame structure. The suspension connection assemblies 4 are used for connecting and fixing to the connection ends on the tractor. The rear side of the lower cross beam 3 is welded and fixed to the working mechanism to be connected to the tractor. The tractor and the working mechanism are stably connected through the three-point hitch device.

[0025] The frame structure formed by the upper cross beam 1, the diagonal beam 2 and the lower cross beam 3 is in the shape of an isosceles trapezoid with a narrow upper part and a wide lower part. The diagonal beam 2 is connected to the upper cross beam 1 and the lower cross beam 3 by welding.

[0026] As Figures 2-7 shown, the suspension connection assembly 4 includes a fixed part fixedly connected to the frame structure and a detachable part movably and detachably connected to the fixed part. The fixed part includes a welding plate 47 welded to the front sides of the upper cross beam 1 and the lower cross beam 3. A reinforcing rib plate 41 is connected to the back of the welding plate 47. The reinforcing rib plate 41 is welded and fixed to the upper cross beam 1 and the lower cross beam 3. A plurality of bolt holes are evenly distributed on the welding plate 47. The detachable part includes a fixed plate 42 for movably connecting with the welding plate 47 and two groups of pin hole plates 43 vertically installed on the front side of the fixed plate 42. The fixed plate 42 is provided with bolt holes corresponding to those on the welding plate 47. The fixed plate 42 and the welding plate 47 are detachably connected by bolts 46. Pin holes 44 are symmetrically formed on the pin hole plates 43. A pin shaft 45 is inserted into the pin holes 44. The pin shaft 45 is used for connecting and fixing to the pin holes of the connection ends on the tractor.

[0027] The two groups of pin hole plates 43 are symmetrically and vertically arranged. The pin hole plates 43 are welded and fixed to the fixed plate 42. The pin holes 44 and the pin shafts 45 on the pin hole plates 43 are adapted to the connection ends on the tractor.

[0028] In a preferred embodiment of the present utility model, multiple sets of disassembly parts with different specifications can be prefabricated in advance. The pin holes 44 and the pin shafts 45 of each set of disassembly parts are adapted to the connection ends of different models of tractors, so that the three-point connection device of the present utility model can match the vast majority of tractors on the market. When the working mechanism needs to be connected to different models of tractors for use, only the bolt 46 needs to be removed and the disassembly part matching the pin hole of the tractor connection end is replaced, then the replacement installation of the working mechanism and the tractor can be quickly completed.

[0029] In a preferred embodiment of the present utility model, in order to improve the welding stability between the diagonal tension beam 2 and the lower cross beam 3 and facilitate the welding installation of the suspension connection assembly 4, a bending part 21 is provided at the lower end of the diagonal tension beam 2, and the bending part 21 is used for welding and fixing with the end of the lower cross beam 3.

[0030] For the three-point connection device of the present utility model, first, the upper cross beam 1, the diagonal tension beam 2 and the lower cross beam 3 are welded into an isosceles trapezoid-shaped frame structure. The reinforcing rib plates 41 and the welding plates 47 with pre-drilled bolt holes are respectively welded to the middle of the upper cross beam 1 and the front sides of both ends of the lower cross beam 3. The rear side of the lower cross beam 3 is welded and fixed to the front end of the working mechanism to be connected to the tractor. According to the model of the connection end on the tractor, the matching disassembly part is selected, and the disassembly part is fixedly installed on the welding plate 47 through the bolt 46. Then, the pin hole of the connection end on the tractor is connected and fixed with the pin hole 44 on the pin hole plate 43 through the pin shaft 45, thus completing the connection and fixation between the tractor and the working mechanism.

[0031] The above-described embodiments only describe the preferred embodiments of the present utility model, and do not limit the concept and scope of the present utility model. Without departing from the design concept of the present utility model, various variations and improvements made by those of ordinary skill in the art to the technical solutions of the present utility model should all fall within the protection scope of the present utility model.

[0032] The technologies, shapes, and structures not described in detail in the present utility model are all well-known technologies.

Claims

1. A three-point hitch device for a tractor, characterized in that: It includes an upper crossbeam, a diagonal beam and a lower crossbeam for forming a frame structure. The diagonal beams are provided with two groups. The tops of the two groups of diagonal beams are respectively fixedly connected to the two ends of the upper crossbeam, and the bottoms of the two groups of diagonal beams are respectively fixedly connected to the two ends of the lower crossbeam. The middle part of the upper crossbeam and the two ends of the lower crossbeam are respectively fixedly installed with suspension connection components, and the suspension connection components are all located on the front side of the frame structure. The suspension connection assembly includes a fixing part and a disassembly part, the fixing part includes a welding plate welded to the front side of the upper cross beam and the lower cross beam, the back of the welding plate is connected to a reinforcing rib plate, the reinforcing rib plate is welded and fixed to the upper cross beam and the lower cross beam, and a plurality of bolt holes are evenly distributed on the welding plate; The disassembly part includes a fixing plate for being movably connected with the welding plate and two groups of pin hole plates vertically installed on the front side of the fixing plate. The fixing plate is provided with bolt holes corresponding to those on the welding plate. The fixing plate and the welding plate are detachably connected by bolts. Pin holes are symmetrically provided on the pin hole plate. Pin shafts are inserted into the pin holes. The pin shafts are used to be connected and fixed with the pin holes at the connecting end on the tractor.

2. The three-point hitch of a tractor according to claim 1, characterized in that: The two groups of pin hole plates are symmetrically arranged vertically, the pin hole plates are welded and fixed on the fixing plate, and the pin holes and pin shafts on the pin hole plates are matched with the connecting ends on the tractor.

3. The three-point hitch of a tractor according to claim 1, characterized in that: The frame structure composed of the upper cross beam, the inclined beam and the lower cross beam is in the shape of an isosceles trapezoid which is narrow at the top and wide at the bottom. The inclined beam is connected to the upper cross beam and the lower cross beam by welding.

4. The three-point hitch of a tractor according to claim 1, characterized in that: A bending portion is provided at the lower end of the inclined beam, and the bending portion is used for welding and fixing with the end of the lower cross beam.

5. The three-point hitch of a tractor according to claim 1, characterized in that: The rear side of the lower cross beam is welded and fixed on the working mechanism to be connected with the tractor.

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