Four-bar hydraulic turnover device for large square bale stacking

Abstract

The utility model discloses a four connecting rod hydraulic turnover device for big square bale stacking relates to agricultural machinery engineering field, including clamping pick -up turnover mechanism, hydraulic cylinder + four connecting rod turnover mechanism and fixed frame, and clamping pick -up turnover mechanism sets up in the front end of whole device, and hydraulic cylinder + four connecting rod turnover mechanism sets up between clamping pick -up turnover mechanism and fixed frame, and fixed frame sets up in the rear of whole device, and fixed frame is fixedly connected with tractor, and the hydraulic system intercommunication of clamping pick -up turnover mechanism and hydraulic cylinder + four connecting rod turnover mechanism's hydraulic component is on tractor. The utility model aims at big weight, big volume square bale not easy stacking's operation problem, through the dynamic, and the fixed embrace clamps tightly square bale through turnover hydraulic cylinder and four connecting rod mechanism control clamping turnover mechanism and turn over 180 degrees after lifting, the dynamic embrace clamps loose, make square bale to be placed to the specified platform, and the turnover arm returns to the original position again, and completes stacking, and has improved the placing efficiency of large square bale.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery engineering, and in particular to a four-bar hydraulic tilting device for stacking large hay bales. Background Technology

[0002] There are three main types of traditional square hay bale stacking mechanisms: chain / conveyor belt stacking mechanisms, which move square hay bales to designated stacking positions via conveyor chains or belts; multi-degree-of-freedom stacking robotic arms, which stack square hay bales by controlling the parameters of each joint; and segmented stacking mechanisms using a primary flipping arm, a secondary flipping arm, and telescopic hydraulic cylinders. With advancements in straw and forage baling technology, large square hay bales can reach cross-sectional dimensions of 900 mm × 1200 mm and weigh up to 500 kg. Chain / conveyor belt stacking methods are prone to difficulties in transport and maintenance. Using multi-degree-of-freedom stacking robotic arms and segmented flipping stacking methods requires increased strength and mass of the robotic arms due to the excessive weight of the bales, resulting in less compact structures and a tendency for lifting and flipping movements to jam, leading to stacking failures.

[0003] Therefore, in view of the shortcomings of the above-mentioned bale stacking mechanism, if a new type of large bale stacking mechanism can be provided, which can solve the problems of flipping and stacking caused by large volume and heavy bales, it will provide a technical reference for the development of large bale picking and stacking machines. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this utility model proposes a simple single-arm four-bar hydraulic flipping mechanism for flipping and stacking large square bales of straw. It can achieve stable 180° flipping and stacking of large square bales of straw by relying on only one flipping arm, two sets of lifting hydraulic cylinders and four-bar linkage mechanism.

[0005] The present invention adopts the following technical solution: A four-bar hydraulic tilting device for stacking large hay bales includes a clamping and picking tilting mechanism, a hydraulic cylinder + four-bar tilting mechanism, and a fixed frame. The clamping and picking tilting mechanism is located at the front end of the entire device, the hydraulic cylinder + four-bar tilting mechanism is located between the clamping and picking tilting mechanism and the fixed frame, the fixed frame is located at the rear of the entire device, and the fixed frame is fixedly connected to a tractor. The hydraulic components of the clamping and picking tilting mechanism and the hydraulic cylinder + four-bar tilting mechanism are connected to the hydraulic system on the tractor.

[0006] The clamping, picking up, and flipping mechanism includes a clamping friction strip, a fixed clamp, a clamping mounting frame, a flipping arm, flipping arm ear plates, a movable clamping mounting seat, a clamping hydraulic cylinder, and a movable clamp. The fixed clamp is directly fixedly connected to the upper and lower end faces of the clamping mounting frame and installed on one side. The movable clamping mounting seat is installed on the other side of the clamping mounting frame, and the movable clamp is hinged to the movable clamping mounting seat. The clamping friction strip is installed on the clamping end faces of the fixed clamp and the movable clamp. The rear end of the clamping hydraulic cylinder body is hinged to the movable clamping mounting seat, and the front end of the piston rod is hinged to the movable clamp. The flipping arm is fixedly connected to the rear end face of the clamping mounting frame, and the included angle between the two is 45°. There are a total of 4 flipping arm ear plates, which are arranged in groups of 2 and vertically fixedly connected to the rear end face of the flipping arm. Each flipping arm ear plate has two hinge holes, one upper and one lower. The upper hinge hole of the flipping arm ear plate is hinged to the hinge hole on the connecting ear plate of the fixed frame.

[0007] The hydraulic cylinder + four-bar linkage tilting mechanism includes two sets of tilting hydraulic cylinders, four drive links, four driven links, a swing arm link, and a linkage frame. The swing arm link is directly connected to the corresponding connecting holes on the tilting arm ear plate and the connecting ear plate. The linkage frame is formed by a fixed hinge hole on the tilting arm ear plate. Both the drive and driven links are hinged to the drive and driven links through shaft holes on the tilting arm ear plate, forming a four-bar linkage. There are four drive links and four driven links, arranged in pairs, symmetrically on the left and right. One end of the drive link is hinged to one end of the driven link and the piston rod of the tilting hydraulic cylinder, while the other end is hinged to the connecting hole below the connecting ear plate of the fixed frame. The driven link is hinged to the lower hinge hole of the tilting arm ear plate, and the tail end of the tilting hydraulic cylinder is hinged to the tilting hydraulic cylinder mounting base.

[0008] The fixed frame includes connecting ear plates, a tilting arm mounting frame, a tilting hydraulic cylinder mounting base, a tilting limit block, a bottom frame, and a tilting limit plate. There are two tilting hydraulic cylinder mounting bases, fixed on the left and right sides of the tilting arm mounting frame. There are four connecting ear plates, arranged in groups of two, installed on the upper left and right sides of the tilting arm mounting frame. There are two tilting limit plates, installed on the rear end of each group of connecting ear plates. The bottom frame is installed at the rear end of the tilting arm mounting frame, and the tilting arm limit block is installed at the lower front end of the tilting arm mounting frame. When the clamping and picking tilting mechanism is in its initial state, it serves as a limit; when the clamping and picking tilting mechanism is in a 180° tilting state, the tilting arm limit plate serves as a limit.

[0009] The number of clamping friction strips is 2 to 4, and they are evenly installed on the clamping end faces of the fixed clamp and the moving clamp.

[0010] The installation angle between the bottom frame and the tilting arm mounting frame is 45°.

[0011] The flip arm limiting block is installed at the lower front end of the flip arm mounting frame. It serves as a limit when the clamping and picking flipping mechanism is in the initial state, and as a limit when the clamping and picking flipping mechanism is in the 180° flipping state.

[0012] The beneficial effects of this utility model are as follows: Addressing the challenge of stacking heavy, large-volume square bales, this device uses a combination of moving and fixed clamps to hold the bales tightly. A hydraulic cylinder and a four-bar linkage control the clamping and flipping mechanism to lift and flip the bales 180°. The moving clamp then releases, allowing the bales to be placed on the designated stacking platform, and the flipping arm returns to its original position. This stacking device solves the problem of a single hydraulic cylinder encountering a "dead point" when controlling the flipping device to rotate 180°. Compared to common stacking devices, this device has a compact structure, a simple operation process, and improves the stacking efficiency of square bales. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of the present invention (in the state of "moving clamp open - tilting hydraulic cylinder closed"); Figure 2 This is a schematic diagram of the clamping, picking up, and flipping structure of this utility model; Figure 3 This is a schematic diagram of the four-link + hydraulic cylinder structure of this utility model; Figure 4 This is a schematic diagram of the fixing frame structure of this utility model; Figure 5 This is a schematic diagram of the present invention in the state of "moving clamp closed - moving clamp hydraulic cylinder open"; Figure 6 This is a schematic diagram of the present invention in the state of "dynamic clamp closing - tilting hydraulic cylinder tilting 45°"; Figure 7 This is a schematic diagram of the present invention in the state of "dynamic clamp closing - tilting hydraulic cylinder tilting 90°"; Figure 8 This is a schematic diagram of the present invention in the state of "dynamic clamp opening - tilting hydraulic cylinder tilting 180°".

[0014] In the diagram: 1. Clamping and picking-up flipping mechanism; 2. Hydraulic cylinder + four-bar flipping mechanism; 3. Fixed frame; 1-1. Clamping friction strip; 1-2. Fixed clamp; 1-3. Clamping mounting seat; 1-4. Flipping arm; 1-5. Flipping arm ear plate; 1-6. Moving clamp mounting seat; 1-7. Moving clamp hydraulic cylinder; 1-8. Moving clamp; 2-1. Flipping hydraulic cylinder; 2-2. Drive link; 2-3. Driven link; 2-4. Swing arm link; 2-5. Linkage frame; 3-1. Connecting ear plate; 3-2. Flipping arm mounting frame; 3-3. Flipping hydraulic cylinder mounting seat; 3-4. Flipping limit block; 3-5. Bottom frame; 3-6. Flipping limit plate. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0016] Please see Figures 1 to 8As shown, a four-bar hydraulic tilting device for stacking large hay bales includes a clamping and picking tilting mechanism 1, a hydraulic cylinder + four-bar tilting mechanism 2, and a fixed frame 3. The clamping and picking tilting mechanism 1 is located at the front end of the entire device. The hydraulic components in the clamping and picking tilting mechanism 1 are connected to the tractor's hydraulic system. The clamping and picking tilting mechanism 1 includes a clamping friction strip 1-1, a fixed clamp 1-2, a clamp mounting frame 1-3, a tilting arm 1-4, a tilting arm ear plate 1-5, a movable clamp mounting seat 1-6, a clamping hydraulic cylinder 1-7, and a movable clamp 1-8. The hydraulic cylinder + four-bar tilting mechanism 2 is located between the clamping and picking tilting mechanism 1 and the fixed frame 3. The hydraulic components in the hydraulic cylinder + four-bar tilting mechanism 2 are connected to the tractor's hydraulic system. The lever flipping mechanism 2 includes two sets of flipping hydraulic cylinders 2-1, four drive connecting rods 2-2, four driven connecting rods 2-3, a swing arm connecting rod 2-4, and a connecting rod frame 2-5. The swing arm connecting rod 2-4 is directly connected by corresponding connecting holes on the flipping arm ear plate 1-5 and the connecting ear plate 3-1. The connecting rod frame 2-5 is formed by fixed hinge holes on the flipping arm ear plate 3-1. Both are hinged to the drive connecting rods 2-2 and driven connecting rods 2-3 through shaft holes, forming a four-bar linkage. The fixed frame 3 is fixedly connected to the large-format bale picker. The fixed frame 3 mainly includes a connecting ear plate 3-1, a flipping arm mounting frame 3-2, a flipping hydraulic cylinder mounting seat 3-3, a flipping limit block 3-4, a bottom frame 3-5, and a flipping limit plate 3-6. A fixed clamp is also included. 1-2 is directly fixedly connected to the upper and lower end faces of the clamp mounting bracket 1-3 and installed on one side. The movable clamp mounting seat 1-6 is installed on the other side of the clamp mounting bracket 1-3. The movable clamp 1-8 is hinged to the movable clamp mounting seat 1-6. The rear end of the clamp hydraulic cylinder 1-7 is hinged to the movable clamp mounting seat 1-6, and the front end of the piston rod is hinged to the movable clamp 1-8. The tilting arm 1-4 is fixedly connected to the rear end face of the clamp mounting bracket 1-3, with an included angle of 45°. There are a total of 4 tilting arm ear plates 1-5, in groups of 2, vertically fixedly connected to the rear end face of the tilting arm 1-4. Each tilting arm ear plate 1-5 has two hinge holes, one upper and one lower. The upper hinge hole of the tilting arm ear plate 1-5 is hinged to the upper hinge hole of the connecting ear plate 3-1 of the fixed bracket. The drive connecting rod 2-2 There are four driven connecting rods 2-3, arranged in groups of two, symmetrically installed on the left and right. One end of the driving connecting rod 2-2 is hinged to one end of the driven connecting rod 2-3 and the piston rod of the tilting hydraulic cylinder 2-1. The tail end of the tilting hydraulic cylinder 2-1 is hinged to the tilting hydraulic cylinder mounting seat 3-3, and its other end is hinged to the lower connecting hole of the connecting ear plate 3-1 of the fixed frame. The driven connecting rod 2-3 is hinged to the lower hinge hole of the tilting arm ear plate 1-5. There are two tilting hydraulic cylinder mounting seats 3-3, which are fixed on the left and right sides of the tilting arm mounting frame 3-2. There are four connecting ear plates 3-1, arranged in groups of two, installed on the upper left and right sides of the tilting arm mounting frame 3-3. There are two tilting limit plates 3-6, which are installed on the rear end of each group of connecting ear plates 3-1.The bottom frame 3-5 is mounted on the rear end of the tilting arm mounting frame 3-2.

[0017] The working process of this utility model is divided into four processes according to the sequence of actions: the moving clamp 1-8 opens, the moving clamp hydraulic cylinder 1-7 closes (e.g., ... Figure 1 (Preparing to clamp the bale of straw), the moving clamp 1-8 closes - the moving clamp hydraulic cylinder 1-7 opens (as shown) Figure 5 (To pick up the bales), the hydraulic cylinder 2-1 is opened (as shown in the image). Figure 6 The tilting arm tilts 45° to lift the bales; the tilting hydraulic cylinder 2-1 opens (as shown). Figure 7 The tilting arm tilts 90° to lift the bale; tilting hydraulic cylinder 2-1 opens, moving clamp hydraulic cylinder 1-7 closes, and moving clamp 1-8 opens (as shown). Figure 8 The tilting arm rotates 180° to stack the hay bales. During operation, the movable clamping hydraulic cylinder 1-7 is in the closed state, and the movable clamping clamp 1-8 is in the open state. At this time, there is an angle between the movable clamping clamp 1-8 and the fixed clamping clamp 1-2, which facilitates the clamping of large hay bales. Then, the movable clamping hydraulic cylinder 1-7 changes from the closed state to the closed state, and the movable clamping clamp 1-8 changes to the closed state. At this time, the large hay bales are clamped by the fixed clamping clamp 1-2 and the movable clamping clamp 1-8. The clamping friction strip 1-1 increases the friction between the clamping clamp and the hay bales, ensuring the stability of the hay bales clamping. Then, the tilting hydraulic cylinder 2-1, which was originally in the closed state, changes... In the open state, the tilting hydraulic cylinder 2-1 applies a thrust to the drive linkage 2-2. The drive linkage 2-2 drives the driven linkage 2-3 and the tilting arm ear plate 1-5 to move together, causing the entire clamping and picking tilting mechanism 1 to lift backward and upward, tilting 180°. At this time, the upper end of the tilting arm contacts the tilting arm limit plate 3-6, and the tilting operation is completed. Finally, the moving clamping hydraulic cylinder 1-7 changes from the previous open state to the closed state, and the moving clamp 1-8 opens again. At this time, the large bales of straw are released and stacked in the designated stacking position. Afterward, the tilting arm hydraulic cylinder 2-1 changes from the open state to the closed state, driving the clamping and picking tilting mechanism 1 back to the open state. Figure 1 Status: Cyclic operation.

[0018] The number of the clamping friction strips 1-1 is 2 to 4, which are evenly installed on the clamping end faces of the fixed clamping clip 1-2 and the movable clamping clip 1-8, so as to increase the friction when clamping the bale of grass and ensure stable clamping.

[0019] The installation angle between the bottom frame 3-5 and the flip arm mounting frame 3-2 is 45°.

[0020] The tilting arm limiting block 3-4 is installed at the lower front end of the tilting arm mounting frame 3-2. It serves as a limiting device when the clamping and picking tilting mechanism 1 is in its initial state, and as a limiting device when the clamping and picking tilting mechanism 1 is in a 180° tilting state. The tilting arm limiting plate 3-6 then serves as a limiting device. Figure 7 As shown.

[0021] This invention addresses the challenge of stacking heavy, bulky square bales. It utilizes a combination of moving and stationary clamps to hold the bales in place. A hydraulic cylinder and a four-bar linkage control the lifting and flipping mechanism, raising and flipping the bales 180°. The moving clamps then release, allowing the bales to be placed on a designated stacking platform, and the flipping arm returns to its original position. This stacking device overcomes the "dead point" problem encountered by a single hydraulic cylinder when controlling the 180° flip. Compared to common stacking devices, this device is more compact, has a simpler operation process, and improves the stacking efficiency of square bales.

[0022] The above-described specific embodiments are merely specific solutions of this utility model and are not intended to limit this utility model in any other way. Any person skilled in the art may use the disclosed technical content to make changes or modifications to equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical principles of this utility model shall fall within the patent protection scope of this utility model.

Claims

1. A four-bar hydraulic tilting device for stacking large hay bales, characterized in that: The device includes a clamping and picking flipping mechanism (1), a hydraulic cylinder + four-bar linkage flipping mechanism (2), and a fixed frame (3). The clamping and picking flipping mechanism is located at the front end of the entire device. The hydraulic cylinder + four-bar linkage flipping mechanism (2) is located between the clamping and picking flipping mechanism (1) and the fixed frame (3). The fixed frame (3) is located at the rear of the entire device. The fixed frame (3) is fixedly connected to the tractor. The hydraulic components of the clamping and picking flipping mechanism (1) and the hydraulic cylinder + four-bar linkage flipping mechanism (2) are connected to the hydraulic system on the tractor.

2. The four-bar hydraulic tilting device for stacking large hay bales according to claim 1, characterized in that: The clamping, picking, and flipping mechanism (1) includes a clamping friction strip (1-1), a fixed clamp (1-2), a clamping mounting frame (1-3), a flipping arm (1-4), a flipping arm ear plate (1-5), a movable clamping mounting seat (1-6), a clamping hydraulic cylinder (1-7), and a movable clamp (1-8). The fixed clamp (1-2) is directly fixedly connected to the upper and lower end faces of the clamping mounting frame (1-3) and installed on one side. The movable clamping mounting seat (1-6) is installed on the other side of the clamping mounting frame (1-3). The movable clamp (1-8) is hinged to the movable clamping mounting seat (1-6). The clamping friction strip (1-1) is installed on the fixed clamp (1-4). -2) On the clamping end face of the moving clamp (1-8), the rear end of the clamping hydraulic cylinder (1-7) is hinged to the moving clamp mounting seat (1-6), and the front end of the piston rod is hinged to the moving clamp (1-8). The flipping arm (1-4) is fixedly connected to the rear end face of the clamp mounting frame (1-3), and the included angle between the two is 45°. There are a total of 4 flipping arm ear plates (1-5), which are in groups of 2 and are vertically fixedly connected to the rear end face of the flipping arm (1-4). Each flipping arm ear plate (1-5) has two hinge holes, one above and one below. The upper hinge hole of the flipping arm ear plate (1-5) is hinged to the upper hinge hole of the connecting ear plate (3-1) of the fixed frame.

3. A four-bar hydraulic tilting device for stacking large hay bales according to claim 2, characterized in that: The hydraulic cylinder + four-bar linkage tilting mechanism (2) includes two sets of tilting hydraulic cylinders (2-1), four drive linkages (2-2), four driven linkages (2-3), a swing arm linkage (2-4), and a linkage frame (2-5). There are four drive linkages (2-2) and four driven linkages (2-3), which are arranged in groups of two and installed symmetrically on the left and right. One end of the drive linkage (2-2) is hinged to one end of the driven linkage (2-3) and the piston rod of the tilting hydraulic cylinder (2-1), and the other end is hinged to the lower connecting hole of the connecting ear plate (3-1) of the fixed frame. The driven linkage (2-3) is hinged to the lower hinge hole of the tilting arm ear plate (1-5). The tail end of the tilting hydraulic cylinder (2-1) is hinged to the tilting hydraulic cylinder mounting seat (3-3).

4. A four-bar hydraulic tilting device for stacking large hay bales according to claim 3, characterized in that: The fixed frame (3) includes connecting ear plates (3-1), a tilting arm mounting frame (3-2), a tilting hydraulic cylinder mounting seat (3-3), a tilting limit block (3-4), a bottom frame (3-5), and a tilting limit plate (3-6). There are two tilting hydraulic cylinder mounting seats (3-3), which are fixed on the left and right sides of the tilting arm mounting frame (3-2). There are four connecting ear plates (3-1), which are installed in groups of two on the left and right upper ends of the tilting arm mounting frame (3-2). There are two tilting limit plates (3-6), which are installed at the rear end of each group of connecting ear plates (3-1). The bottom frame (3-5) is installed at the rear end of the tilting arm mounting frame (3-2), and the tilting arm limit block (3-4) is installed at the lower front end of the tilting arm mounting frame (3-2). When the clamping and picking tilting mechanism (1) is in the initial state, it plays a limiting role. When the clamping and picking tilting mechanism (1) is in the 180° tilting state, the tilting arm limit plate (3-6) plays a limiting role.

5. A four-bar hydraulic tilting device for stacking large hay bales according to claim 4, characterized in that: The number of the clamping friction strips (1-1) is 2 to 4, which are evenly installed on the clamping end faces of the fixed clamp (1-2) and the movable clamp (1-8).

6. A four-bar hydraulic tilting device for stacking large hay bales according to claim 5, characterized in that: The mounting angle between the bottom frame (3-5) and the tilting arm mounting frame (3-2) is 45°.

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