Dual-cylinder lifting and traction composite device

Abstract

This utility model belongs to the technical field of tractor traction lifting devices, and in particular, it is a dual-cylinder lifting and traction composite device. The dual-cylinder lifting traction composite frame is connected to the gearbox and rear axle by three sets of bolts. The first two sets are for the left and right rear axle connecting plates, which are respectively connected to the rear axles on both sides by the first bolt. The second set is for the gearbox connecting plate, which is connected to the rear side of the gearbox by the second bolt. This three-set bolt connection fully utilizes the connection points on the gearbox and rear axle, making the traction lifting mechanism stable and easy to install. A steering arm support sleeve is welded into the hole above the dual-cylinder lifting traction composite frame. Nylon sleeves are inlaid in the inner holes at both ends of the sleeve, acting as sliding bearings. The lifting shaft is installed in the nylon sleeves, and the lifting shaft has splines at both ends. The left and right lifting arms are connected to the lifting shaft through internal splines. This structure provides stable and reliable lifting, is simple in structure, very convenient for disassembly and maintenance, and has low manufacturing costs.

Description

Technical Field

[0001] This utility model belongs to the technical field of tractor traction lifting devices, specifically relating to a dual-cylinder lifting and traction composite device. Background Technology

[0002] Tractor towing and lifting devices are mainly used to achieve functions such as raising and lowering agricultural implements, adjusting tillage depth, and towing cargo beds. They consist of a hydraulic system composed of a hydraulic pump, control valves, and hydraulic cylinders, enabling the raising and lowering of agricultural implements. When connected to a cargo bed, they can be used to tow the cargo bed. For example, Chinese patent document CN211321958 describes a hydraulic leveling suspension device specifically for mountain tractors, and Chinese patent document CN211231352 describes a tractor control system, both capable of raising and lowering agricultural implements. Existing tractor towing and lifting devices mainly suffer from problems such as unstable and inconvenient connection between the device and the tractor body. Utility Model Content

[0003] The present invention aims to provide a dual-cylinder lifting and traction composite device, so as to achieve a more stable connection to the lifting and traction device at the rear of the tractor.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A dual-cylinder lifting and traction composite device is provided, including a gearbox. A dual-cylinder lifting and traction composite frame is provided at the rear of the gearbox. The dual-cylinder lifting and traction composite frame includes a gearbox connecting plate, support plates on both sides of the gearbox connecting plate, a lower support at the bottom of the support plates, an upper support at the top of the support plates, a left rear axle connecting plate and a right rear axle connecting plate at the bottom of the support plates, and rear axles on both sides of the rear of the gearbox. The gearbox connecting plate, the left rear axle connecting plate and the right rear axle connecting plate are respectively bolted to the gearbox and the rear axles on both sides. A lifting shaft is provided at the top of the support plates, lifting arms are provided on both sides of the lifting shaft, and a hydraulic cylinder is provided between the lifting arms and the lower support. A lifting mechanism is provided on the lower support, the upper support and the lifting arms, and a traction mechanism is also provided on the lower support.

[0005] Preferably, the lifting mechanism includes a pull rod, a diagonal rod, and an upper pull rod. The front end of the pull rod is hinged to the lower support. One end of the diagonal rod is hinged to the lifting arm, and the other end is hinged to the pull rod. The front end of the upper pull rod is hinged to the upper support.

[0006] Preferably, the lifting mechanism is a three-point suspension lifting mechanism, with two lower pull rods, two diagonal pull rods, and one upper pull rod.

[0007] Preferably, the traction mechanism includes a traction pin disposed on the lower support and a traction fork disposed on the traction pin.

[0008] Preferably, traction fork spacers are provided on both sides of the traction fork on the traction pin shaft.

[0009] Preferably, a steering arm support sleeve is provided on the top of the support plate, and nylon sleeves are inlaid in the inner holes at both ends of the steering arm support sleeve. The lifting shaft is installed in the nylon sleeves, and splines are provided at both ends of the lifting shaft. The lifting arms on the left and right sides are connected to the lifting shaft through internal splines.

[0010] Preferably, the upper support includes a horizontal plate disposed on the upper part of the support upright and an upper ear plate disposed on the rear side of the horizontal plate; the lower support includes a lower ear plate integrally formed with the support upright.

[0011] Preferably, the upper ear plate has two upper connecting holes spaced apart vertically; the lower ear plate has two lower connecting holes spaced apart vertically, and a support pin and a support sleeve are provided on the lower ear plate.

[0012] Preferably, the rear axle has a thickened section, and a connecting surface is provided on the front side of the thickened section.

[0013] Preferably, it also includes a multi-way valve and a gear pump, wherein the multi-way valve is connected to the gear pump and the cylinder via oil pipes.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. The dual-cylinder lifting and traction composite device has a dual-cylinder lifting and traction composite frame at the rear of the gearbox. The dual-cylinder lifting and traction composite frame is connected to the gearbox and the rear axle by three sets of bolts. The first two sets are the left and right rear axle connecting plates, which are respectively connected to the rear axles on both sides by the first bolt. The second set is the gearbox connecting plate, which is connected to the rear side of the gearbox by the second bolt. The three sets of bolts make full use of the connection positions on the gearbox and the rear axle, so that the traction lifting mechanism is stable, simple in structure and easy to install.

[0015] 2. A steering arm support sleeve is welded into the hole above the double-cylinder lifting and traction composite frame. Nylon sleeves are inlaid in the inner holes at both ends of the sleeve. The nylon sleeves act as sliding bearings. The lifting shaft is installed in the nylon sleeves. The lifting shaft has splines at both ends. The left and right lifting arms are connected to the lifting shaft through the inner splines. This structure is stable and reliable, simple in structure, very convenient to disassemble and maintain, and has low manufacturing cost.

[0016] 3. The far end hole of the lifting arm is connected to the diagonal tie rod by a pin. The rear end of the diagonal tie rod is connected to the middle hole of the lower tie rod by a pin. The front end of the upper tie rod is connected to the upper support by the upper tie rod pin. The lower tie rod is connected to the lower support by the lower tie rod pin. The traction fork is connected to the lower support by the traction pin. The whole traction and lifting device has a simple, compact and practical structure. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a side view of an embodiment of the dual-cylinder lifting and traction composite device of this utility model.

[0018] Figure 2 This is a top view of a structural schematic diagram of an embodiment of the dual-cylinder lifting and traction composite device of this utility model.

[0019] Figure 3 This is a rear view structural schematic diagram of an embodiment of the dual-cylinder lifting and traction composite device of this utility model.

[0020] Figure 4 This is a side view of the dual-cylinder lifting and traction composite frame in one embodiment of the dual-cylinder lifting and traction composite device of this utility model.

[0021] Figure 5 This is a rear view schematic diagram of the dual-cylinder lifting and traction composite frame in one embodiment of the dual-cylinder lifting and traction composite device of this utility model.

[0022] Figure 6 This is a top view of the structure of the double-cylinder lifting and traction composite frame in one embodiment of the double-cylinder lifting and traction composite device of this utility model.

[0023] The labels in the diagram are as follows: Transmission 100, rear axle 100-1, thickened part 100-1-1, first bolt 100-1-2, second bolt 100-1-3; Dual-cylinder lifting traction composite frame 1, gearbox connecting plate 1-1, support upright plate 1-2, lower support 1-3, lower ear plate 1-3-1, lower connecting hole 1-3-2, support pin 1-3-3, support sleeve 1-3-4, lower pull rod pin 1-3-5, upper support 1-4, horizontal plate 1-4-1, upper ear plate 1-4-2, upper connecting hole 1-4-3, left rear axle connecting plate 1-5, right rear axle connecting plate 1-6; 2. Lifting arm, 3. Hydraulic cylinder, 3-1. Multi-way valve, 3-2. Gear pump, 3-3. Upper connecting pin of hydraulic cylinder, 4. Lifting shaft, 4-1. Steering arm support sleeve, 5. Nylon sleeve, 6. Traction pin, 7. Traction fork, 7-1. Traction fork spacer, 8. Lower pull rod, 9. Diagonal pull rod, 10. Upper pin of diagonal pull rod, 10-2. Lower pin of diagonal pull rod, 10-1. Upper pull rod, 11. Upper pull rod pin, 11-1. Suspension point I, suspension point II, suspension point III. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In one embodiment, a dual-cylinder lifting and traction composite device is provided, such as... Figure 1 As shown, the dual-cylinder lifting and traction composite device includes a gearbox 100, which can be driven by the engine on the tractor. A dual-cylinder lifting and traction composite frame 1 is located at the rear of the gearbox 100, combined with... Figure 4-6 As shown, the dual-cylinder lifting and traction composite frame 1 includes a gearbox connecting plate 1-1, and support plates 1-2 are respectively provided on both sides of the gearbox connecting plate 1-1. The gearbox connecting plate 1-1 is a horizontal plate set at the bottom front side of the support plate 1-2. Five screw holes are provided on the gearbox connecting plate 1-1, and a lower support 1-3 is provided at the bottom of the support plate 1-2.

[0026] like Figure 4 As shown, in this embodiment, the lower support 1-3 includes a lower ear plate 1-3-1 integrally formed with the support plate 1-2. The lower rear side of the support plates 1-2 on both sides is integrally formed with a lower ear plate 1-3-1. Each lower ear plate 1-3-1 is provided with two lower connecting holes 1-3-2 spaced vertically. A support pin 1-3-3 and a support sleeve 1-3-4 are provided on the lower ear plate 1-3-1. An upper support 1-4 is provided on the upper part of the support plate 1-2. The upper support 1-4 includes a horizontal plate 1-4-1 provided on the upper part of the support plate 1-2, and two upper ear plates 1-4-2 provided on the rear side of the horizontal plate 1-4-1. The upper ear plates are provided with two upper connecting holes 1-4-3 spaced vertically, thereby providing two connecting holes of different heights for selection.

[0027] like Figure 5As shown, a left rear axle connecting plate 1-5 and a right rear axle connecting plate 1-6 are provided at the bottom of the support plate 1-2. The left rear axle connecting plate 1-5 and the right rear axle connecting plate 1-6 are respectively located on the front side of the bottom of the two support plates 1-2, and triangular support ribs are provided between the left rear axle connecting plate 1-5, the right rear axle connecting plate 1-6 and the corresponding support plate 1-2. Four bolt holes are provided on the left rear axle connecting plate 1-5 and the right rear axle connecting plate 1-6 respectively.

[0028] like Figure 1-3 As shown, rear axles 100-1 are respectively provided on both sides of the rear of the gearbox 100. The rear axles 100-1 can be used to install the tractor drive wheel. In this embodiment, the rear axle 100-1 is provided with a thickened part 100-1-1 (the thickened part 100-1-1 in the figure is a schematic diagram, and its interior can also be provided with holes for the drive shaft to pass through). A connecting surface is provided on the front side of the thickened part 100-1-1. The connecting surface is provided with screw holes that match the screw holes on the left rear axle connecting plate 1-5 and the right rear axle connecting plate 1-6. A screw hole is provided on the rear side of the gearbox 100 that matches the screw holes on the left rear axle connecting plate 1-5 and the right rear axle connecting plate 1-6. The screw holes on the gearbox connecting plate 1-1 are matched with the screw holes. The gearbox connecting plate 1-1, the left rear axle connecting plate 1-5, and the right rear axle connecting plate 1-6 are respectively connected to the gearbox 100 and the rear axles 100-1 on both sides by bolts. The left rear axle connecting plate 1-5 and the right rear axle connecting plate 1-6 are respectively connected to the connecting surface on the front side of the thickened part 100-1-1 of the rear axle 100-1 by the first bolt 100-1-2. The gearbox connecting plate 1-1 is connected to the rear side of the gearbox 100 by the second bolt 100-1-3.

[0029] like Figure 1-3 As shown, a lifting shaft 4 is provided at the top of the support plate 1-2, which serves as a support. Lifting arms 2 are provided on both sides of the lifting shaft 4, and the lifting arms 2 are curved. Hydraulic cylinders 3 are respectively provided between the lifting arms 2 and the lower support 1-3. The two hydraulic cylinders 3 work together to achieve the lifting effect. The bottom of the hydraulic cylinder 3 is hinged to the support pin 1-3-3, and the top of the hydraulic cylinder 3 is hinged to the lug on the lower side of the lifting arm 2 via the connecting pin 3-3. Lifting mechanisms are provided on the lower support 1-3, the upper support 1-4, and the lifting arms 2. A traction mechanism is also provided on the lower support 1-3. The lifting mechanism is used to connect agricultural implements, and the traction mechanism is used to connect agricultural implements or carts that need to be towed.

[0030] like Figure 2 As shown, the dual-cylinder lifting and traction composite device also includes a multi-way valve 3-1 and a gear pump 3-2. The multi-way valve 3-1 is connected to the gear pump 3-2 and the cylinder 3 via oil pipes. The gear pump 3-2 is driven by the gearbox main shaft, which is equipped with a pulley and can be connected to the engine via a belt. The multi-way valve 3-1 can be installed on the tractor, and an oil tank is installed on the tractor. By operating the multi-way valve 3-1, the cylinder 3 can be driven to lift and lower.

[0031] like Figure 3 As shown, a steering arm support sleeve 4-1 is provided on the top of the support plate 1-2 of the double-cylinder lifting traction composite frame 1. The steering arm support sleeve 4-1 is used to install the lifting shaft 4. Nylon sleeves 5 are inlaid in the inner holes at both ends of the steering arm support sleeve 4-1. The nylon sleeves 5 act as sliding bearings. The lifting shaft 4 is installed in the nylon sleeves 5. Splines are provided at both ends of the lifting shaft 4. The lifting arms 2 on the left and right sides are connected to the lifting shaft 4 through the inner splines. When the lifting arms 2 swing up and down, the lifting shaft 4 rotates accordingly.

[0032] Furthermore, such as Figure 1-6 As shown, the lifting mechanism in the dual-cylinder lifting and traction composite device includes a lower pull rod 9, a diagonal pull rod 10, and an upper pull rod 11. The front end of the lower pull rod 9 is hinged to the lower support 1-3. One end of the diagonal pull rod 10 is hinged to the lifting arm 2, and the other end is hinged to the lower pull rod 9. The front end of the upper pull rod 11 is hinged to the upper support 1-4. The lifting mechanism composed of the lower pull rod 9, the diagonal pull rod 10, and the upper pull rod 11 is a three-point suspension lifting mechanism. There are two lower pull rods and two diagonal pull rods 10, and one upper pull rod 11. Specifically, a pull rod pin 1-3-5 is provided in the support sleeve 1-3-4. The front end of the pull rod 9 is hinged to the pull rod pin 1-3-5. The front ends of the two pull rods 9 are respectively suspension point II and suspension point III. The upper end of the diagonal tie rod 10 is hinged to the front end of the lifting arm 2 through the upper diagonal tie rod pin 10-2. The lower end of the diagonal tie rod 10 is hinged to the middle position of the pull rod 9 through the lower diagonal tie rod pin 10-1. The front end of the upper tie rod 11 is hinged to the upper connecting hole 1-4-3 through the upper tie rod pin 11-1. The rear end of the upper tie rod 11 is the suspension point I. Equipment such as harrows, rotary tillers, and tree diggers can be suspended on suspension points I, II, and III.

[0033] Furthermore, such as Figure 1-3 As shown, the traction mechanism in the dual-cylinder lifting and traction composite device includes a traction pin 6 mounted on the lower support 1-3 and a traction fork 7 mounted on the traction pin 6. The traction pin 6 is installed on the lower connecting hole 1-3-2, and the rear end of the traction fork 7 passes through the traction pin 6. Traction fork spacers 8 are respectively provided on both sides of the traction fork 7 on the traction pin 6 for positioning the traction fork 7. A traction pin 7-1 is provided at the front end of the traction fork 7 for connecting and fixing when connecting to equipment such as carriages.

[0034] This dual-cylinder lifting and traction composite device can be used on single-cylinder tractors. The dual-cylinder lifting and traction composite frame 1 connects the lifting mechanism and the traction mechanism. The dual-cylinder configuration provides strong lifting and lowering capabilities. Its operation is controlled by a hydraulic system consisting of a multi-way valve and a gear pump, ensuring synchronous lifting of the left and right lifting arms 2. The left and right cylinders 3, multi-way valves, and oil tanks can be externally mounted. Compared with current small tractor lifting and traction systems, this device has a simpler and more compact structure, is easier to install and maintain, and does not interfere with each other.

[0035] The working process of this dual-cylinder lifting and traction combined device is as follows: (1) Lifting process: Gear pump 3-2 delivers hydraulic oil, operates multi-way valve 3-1, and pushes the left and right oil cylinders 3 to lift synchronously. The B hole of oil cylinder 3 is connected to the oil inlet of gear pump 3-2, and the A hole is connected to the oil tank outlet. The pressure oil pushes the piston rods of the left and right oil cylinders 3 to rise synchronously. Through the upper connecting pin 3-3 of the oil cylinder, the two lifting arms 2 are pushed to rotate clockwise. Through the upper pin 10-2 of the inclined rod, the inclined rod 10 is driven to move upward. Through the lower pin 10-1 of the inclined rod, the lower rod 9 is driven to rotate clockwise with the lower rod pin 1-3-5 as the axis. This drives the agricultural implement suspended by the three suspension points I, II, and III to rise, and the agricultural implement enters the non-working state.

[0036] (2) Operate the multi-way valve 3-1 so that the A port of the oil cylinder 3 is connected to the gear pump 3-2 for oil inlet and the B port is connected to the oil tank for oil outlet. The pressurized oil pushes the piston rods of the left and right oil cylinders 3 to descend synchronously. The upper connecting pin 3-3 of the oil cylinder pushes the two lifting arms 2 to rotate counterclockwise. The upper pin 10-2 of the inclined rod drives the inclined rod 10 to move down. The lower pin 10-1 of the inclined rod drives the lower pull rod 9 to rotate counterclockwise with the lower pull rod pin 1-3-5 as the axis. This drives the agricultural implement suspended by the three suspension points I, II and III to descend, and the agricultural implement enters the working state.

[0037] (3) Transportation operation process: Remove the lower pull rod 9, the diagonal pull rod 10 and the upper pull rod 11, connect the agricultural machinery to be towed through the traction pin 6 and the traction fork 7, and the agricultural machinery can be driven by a small tow to complete the transportation operation, etc.

[0038] The structural features of this dual-cylinder lifting and traction composite device are as follows: 1. The dual-cylinder lifting traction composite frame 1 is connected to the body (gearbox 100 and rear axle 100-1) of the single-cylinder belt-driven tractor by three sets of bolts. The first two sets are the left rear axle connecting plate 1-5 and the right rear axle connecting plate 1-6 respectively connected to the connecting surface on the front side of the thickened part 100-1-1 of the two rear axles 100-1 by the first bolt 100-1-2. The second set is the gearbox connecting plate 1-1 connected to the rear side of the gearbox 100 by the second bolt 100-1-3. The three sets of bolts make full use of the connection positions on the gearbox and the rear axle, so that the traction lifting mechanism is firmly connected, simple in structure and easy to install.

[0039] 2. A steering arm support sleeve 4-1 is welded into the hole above the double-cylinder lifting traction composite frame 1. Four nylon sleeves 5 are inlaid in the inner holes at both ends of the sleeve. The nylon sleeves 5 act as sliding bearings. The lifting shaft 4 is installed in the nylon sleeves 5. The lifting shaft 4 has splines at both ends. The left and right lifting arms 2 are connected to the lifting shaft 4 through the internal splines. This structure is stable and reliable, simple in structure, very convenient to disassemble and maintain, and has low manufacturing cost.

[0040] 3. The far end hole of the lifting arm 2 is connected to the diagonal tie rod 10 by a pin. The rear end of the diagonal tie rod 10 is connected to the middle hole of the lower tie rod 9 by a pin. The front end of the upper tie rod 11 is connected to the upper support 1-4 by the upper tie rod pin 11-1. The lower tie rod 9 is connected to the lower support 1-3 by the lower tie rod pin 1-3-5. The traction fork 7 is connected to the lower support 1-3 by the traction pin 6. The entire traction and lifting device has a simple, compact, and practical structure.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-cylinder lifting and traction composite device, comprising a gearbox, characterized in that: A dual-cylinder lifting and traction composite frame is provided at the rear of the gearbox. The dual-cylinder lifting and traction composite frame includes a gearbox connecting plate, support plates on both sides of the gearbox connecting plate, a lower support at the bottom of the support plates, an upper support at the top of the support plates, a left rear axle connecting plate and a right rear axle connecting plate at the bottom of the support plates, and rear axles on both sides of the rear of the gearbox. The gearbox connecting plate, the left rear axle connecting plate and the right rear axle connecting plate are respectively bolted to the gearbox and the rear axles on both sides. A lifting shaft is provided at the top of the support plates, lifting arms are provided on both sides of the lifting shaft, and a hydraulic cylinder is provided between the lifting arms and the lower support. A lifting mechanism is provided on the lower support, the upper support and the lifting arms, and a traction mechanism is also provided on the lower support.

2. The dual-cylinder lifting and traction composite device according to claim 1, characterized in that: The lifting mechanism includes a pull rod, a diagonal rod, and an upper pull rod. The front end of the pull rod is hinged to the lower support. One end of the diagonal rod is hinged to the lifting arm, and the other end is hinged to the pull rod. The front end of the upper pull rod is hinged to the upper support.

3. The dual-cylinder lifting and traction composite device according to claim 2, characterized in that: The lifting mechanism is a three-point suspension lifting mechanism, with two lower pull rods, two diagonal pull rods, and one upper pull rod.

4. The dual-cylinder lifting and traction composite device according to claim 1, characterized in that: The traction mechanism includes a traction pin mounted on the lower support and a traction fork mounted on the traction pin.

5. The dual-cylinder lifting and traction composite device according to claim 4, characterized in that: Traction fork spacers are provided on both sides of the traction fork on the traction pin shaft.

6. The dual-cylinder lifting and traction composite device according to claim 1, characterized in that: A steering arm support sleeve is provided on the top of the support plate. Nylon sleeves are inlaid in the inner holes at both ends of the steering arm support sleeve. The lifting shaft is installed in the nylon sleeves. Splines are provided at both ends of the lifting shaft. The lifting arms on the left and right sides are connected to the lifting shaft through internal splines.

7. The dual-cylinder lifting and traction composite device according to claim 1, characterized in that: The upper support includes a horizontal plate disposed on the upper part of the support upright plate and an upper ear plate disposed on the rear side of the horizontal plate; the lower support includes a lower ear plate integrally formed with the support upright plate.

8. The dual-cylinder lifting and traction composite device according to claim 7, characterized in that: The upper ear plate has two upper connecting holes spaced apart vertically; the lower ear plate has two lower connecting holes spaced apart vertically, and a support pin and a support sleeve are provided on the lower ear plate.

9. The dual-cylinder lifting and traction composite device according to claim 1, characterized in that: The rear axle is provided with a thickened section, and a connecting surface is provided on the front side of the thickened section.

10. The dual-cylinder lifting and traction composite device according to claim 1, characterized in that: It also includes a multi-way valve and a gear pump, wherein the multi-way valve is connected to the gear pump and the oil cylinder via oil pipes.

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