Forward-rotation six-connecting-rod working device and engineering machinery
By setting multiple pin holes on the front frame to adjust the pin hinge position, the problem of balancing stability and translation under different working conditions in traditional devices is solved, and excellent translation performance under different attachment states is achieved.
Patent Information
- Application Number
- CN202511376536.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-25
- Publication Date
- 2025-11-21
AI Technical Summary
Traditional forward-rotating six-bar linkage work devices are difficult to design in terms of both stability and translation when attachments are paired with a fork and a bucket, resulting in their inability to perform optimally under different working conditions.
A first pin hole and a second pin hole are provided on the front frame, allowing the first pin shaft to be selectively hinged to the bucket cylinder, realizing the difference in the angle change of the attachment during the boom lifting process under different working conditions, and meeting the translation performance requirements in both inward and non-inward tilting states.
It can perform well in translation under different attachment working conditions, meeting the needs of frequent handling scenarios such as warehouses and logistics centers, as well as bulk material handling scenarios such as construction sites and mines.
Smart Images
Figure CN120990187A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of engineering machinery technology, and in particular to a forward-rotating six-bar linkage working device and engineering machinery. Background Technology
[0002] The loader's working device is its core functional component, responsible for loading, transferring, and unloading materials. Currently, judging from the demand for loader working devices, the use of forward-rotating six-bar linkages is gradually increasing.
[0003] In actual operating conditions, when an attachment is equipped with a swingarm, the stability of the swingarm is paramount. Specifically, the stability of the swingarm is achieved when the bucket cylinder remains stationary to keep it horizontal and prevent it from tipping inwards, and when the boom cylinder extends to lift the boom, the angle change of the swingarm should be minimized. Conversely, when an attachment is equipped with a bucket, the translational performance of the bucket is paramount. Specifically, the bucket cylinder retracts to keep the bucket in a tilted-in position, and when the boom cylinder extends to lift the boom, the angle change of the bucket should be minimized. Traditional forward-rotating six-bar linkage attachments often seek a balance between these two requirements during the design process, resulting in neither the optimal requirements for the swingarm nor the bucket being met. Consequently, when attachments are paired with either a swingarm or a bucket, the stability of the swingarm and the translational performance of the bucket cannot be simultaneously achieved, preventing either attachment from reaching its expected good translational performance. Summary of the Invention
[0004] The purpose of this invention is to provide a forward-rotating six-bar linkage working device that can exhibit good translation performance during boom lifting, whether the attachment is tilted inward or not.
[0005] To achieve this objective, the present invention adopts the following technical solution:
[0006] A forward-rotating six-bar linkage working device includes a front frame, a boom, a rocker arm, a tie rod, a boom cylinder, a bucket cylinder, a quick-change mechanism, a first pin, and attachments. The quick-change mechanism is used to connect the attachments. A first end of the boom is hinged to the quick-change mechanism, a second end of the boom is hinged to the front frame, a first end of the rocker arm is hinged to the middle of the boom, a first end of the tie rod is hinged to the quick-change mechanism, a second end of the rocker arm is hinged to the second end of the tie rod, the cylinder body of the boom cylinder is hinged to the front frame, the cylinder rod is hinged to the boom, and the cylinder rod of the bucket cylinder is hinged to the middle of the rocker arm.
[0007] The front frame has a first pin hole and a second pin hole; wherein...
[0008] When the first pin passes through the first pin hole and is hinged to the cylinder body of the bucket cylinder, during the lifting process of the boom, the angle change of the attachment in the inward-folding state is Δα1, and the angle change of the attachment in the non-inward-folding state is Δα2; when the first pin passes through the second pin hole and is hinged to the cylinder body of the bucket cylinder, during the lifting process of the boom, the angle change of the attachment in the inward-folding state is Δβ1, and the angle change of the attachment in the non-inward-folding state is Δβ2, then Δα1>Δβ1, Δα2<Δβ2.
[0009] Preferably, when the first pin passes through the first pin hole and is hinged to the cylinder body of the bucket cylinder, the angle change Δα2 ≤ 1° of the attachment in the non-inward state during the lifting of the boom; when the first pin passes through the second pin hole and is hinged to the cylinder body of the bucket cylinder, the angle change Δβ1 ≤ 3° of the attachment in the inward state during the lifting of the boom.
[0010] Preferably, the second pin hole is located below the first pin hole and is positioned on the side opposite to the quick-change device compared to the first pin hole.
[0011] Preferably, the attachment includes a fork and a bucket; wherein,
[0012] When the attachment is a flat fork, the first pin passes through the first pin hole and is hinged to the cylinder body of the bucket cylinder; when the attachment is a bucket, the first pin passes through the second pin hole and is hinged to the cylinder body of the bucket cylinder.
[0013] Preferably, the system further includes an adjusting bracket, with the first pin mounted on the adjusting bracket, and the adjusting bracket being fixedly connected to the front frame via a fastener; wherein...
[0014] The front frame has a fixing hole, and the centers of the first pin hole and the second pin hole are both located on a circular trajectory with the fixing hole as the center. The fixing member passes through the adjustment frame and is fixedly connected to the fixing hole.
[0015] Preferably, the fastener is a threaded fastener, the fixing hole is a threaded hole, and the fastener passes through the adjusting bracket and is threadedly connected to the fixing hole.
[0016] Preferably, the front frame is provided with two spaced-apart mounting plates, each mounting plate having the first pin hole and the second pin hole directly opposite each other; wherein...
[0017] The first pin passes through and is supported on the two first pin holes; or...
[0018] The first pin passes through and is supported on the two second pin holes.
[0019] Preferably, there are two booms spaced apart, and the boom cylinders are arranged in a one-to-one correspondence with the booms. A connecting frame is connected to the inner side of the middle of the two booms, and the rocker arm is located between the two booms, with the first end of the rocker arm hinged to the connecting frame.
[0020] Preferably, the front frame has a third pin hole, and the second pin passes through the third pin hole and is hinged to the cylinder body of the boom cylinder.
[0021] The present invention also provides an engineering machine, which includes the above-mentioned forward-rotating six-bar linkage working device, which can perform good translation performance indicators during boom lifting under working conditions where the attachment can be tilted inward or not.
[0022] An engineering machine, comprising:
[0023] Main frame;
[0024] As described in any of the above, the front frame is fixedly mounted on the main frame.
[0025] Beneficial effects:
[0026] The forward-rotating six-link working device provided by this invention, by opening a first pin hole and a second pin hole on the front frame, allows the first pin shaft to be hinged to the cylinder body of the bucket cylinder by either passing through the first pin hole or the second pin hole. Specifically, when the first pin shaft is selected to pass through the first pin hole, during the boom lifting process, the angle change of the attachment in the inward tilt state is Δα1, and the angle change of the attachment in the non-inward tilt state is Δα2; when the first pin shaft is selected to pass through the second pin hole, during the boom lifting process, the angle change of the attachment in the inward tilt state is Δβ1, and the angle change of the attachment in the non-inward tilt state is Δβ2, where Δα1 > Δβ1, and Δα2 < Δβ2. Therefore, in situations where the attachment needs to remain inward tilt during boom lifting, such as when the attachment is a bucket, the first pin shaft can be installed by passing through the second pin hole; in situations where the attachment needs to remain non-inward tilt during boom lifting, such as when the attachment is a flat fork, the first pin shaft can be installed by passing through the first pin hole. This device can maintain excellent translation performance during boom lifting, whether the attachment is tilted inward or not. In other words, the performance of this forward-rotating six-link working device is optimized when equipped with a horizontal fork for handling and loading / unloading goods, and when equipped with a bucket for digging, loading, and transporting bulk materials. It can handle scenarios requiring frequent handling, such as warehouses, logistics centers, and factories, as well as occasions requiring the handling of large quantities of bulk materials, such as construction sites, mines, and farmland.
[0027] The engineering machinery provided by this invention includes the aforementioned forward-rotating six-bar linkage working device, which can exhibit excellent translation performance during boom lifting under working conditions where the attachment can be tilted inward or not. That is, the performance of this forward-rotating six-bar linkage working device is optimized when it is equipped with a flat fork for handling and loading / unloading goods, and when it is equipped with a bucket for digging, loading, and transporting bulk materials. It can be competent for scenarios such as warehouses, logistics centers, and factories that require frequent handling, and can also meet the needs of construction sites, mines, farms, and other occasions that require handling large quantities of bulk materials. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the mounting attachment for the forward-rotating six-bar linkage working device provided by the present invention being a flat fork;
[0029] Figure 2 This is a schematic diagram of the forward-rotating six-link working device provided by the present invention, with the attachment being a bucket;
[0030] Figure 3 This is a schematic diagram of the front frame structure provided by the present invention;
[0031] Figure 4 This is a diagram showing the change in angle between the attachment of the forward-rotating six-bar linkage working device and the ground, provided by the present invention.
[0032] Figure 5 This is a schematic diagram showing how the lateral position of the pin hole changes with the angle of the attachment in this invention;
[0033] Figure 6 This is a schematic diagram showing how the longitudinal position of the pin hole changes with the angle of the attachment.
[0034] In the picture:
[0035] 1. Front frame; 11. First pin hole; 12. Second pin hole; 13. Fixing hole; 14. Mounting plate; 15. Third pin hole; 16. U-shaped groove mounting bracket;
[0036] 2. Boom; 21. Connecting frame;
[0037] 3. Rocker arm;
[0038] 4. Pull rod;
[0039] 51. Boom cylinder; 52. Bucket cylinder;
[0040] 6. Quick-change mechanism;
[0041] 71. First pin; 72. Adjusting bracket; 721. Through hole; 73. Fixing component; 74. Second pin;
[0042] 81. Flat fork; 82. Bucket. Detailed Implementation
[0043] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0044] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0045] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0046] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.
[0047] This invention provides a forward-rotating six-bar linkage working device. (See reference...) Figures 1 to 6As shown, the forward-rotating six-bar linkage includes a front frame 1, a boom 2, a rocker arm 3, a tie rod 4, a boom cylinder 51, a bucket cylinder 52, a quick-change mechanism 6, a first pin 71, and attachments. The quick-change mechanism 6 is used to connect the attachments. The first end of the boom 2 is hinged to the quick-change mechanism 6, and the second end of the boom 2 is hinged to the front frame. The first end of the rocker arm 3 is hinged to the middle of the boom 2. The first end of the tie rod 4 is hinged to the quick-change mechanism 6, and the second end of the rocker arm 3 is hinged to the second end of the tie rod 4. The cylinder body of the boom cylinder 51 is hinged to the front frame 1, and the cylinder rod is hinged to the boom 2. The cylinder rod of the bucket cylinder 52 is hinged to the middle of the rocker arm 3. The front frame 1 has a first pin hole 11 and a second pin hole 12. When the first pin 71 passes through the first pin hole 11 and is hinged to the cylinder body of the rotating bucket cylinder 52, during the lifting process of the boom 2, the angle change of the attachment in the inward tilt state is Δα1, and the angle change of the attachment in the non-inward tilt state is Δα2; when the first pin 71 passes through the second pin hole 12 and is hinged to the cylinder body of the rotating bucket cylinder 52, during the lifting process of the boom 2, the angle change of the attachment in the inward tilt state is Δβ1, and the angle change of the attachment in the non-inward tilt state is Δβ2. Therefore, Δα1 > Δβ1, and Δα2 < Δβ2.
[0048] In this embodiment, the attachment includes a horizontal fork 81 and a bucket 82. When the attachment is a horizontal fork 81, a first pin 71 passes through a first pin hole 11 and is hinged to the cylinder body of the bucket cylinder 52; when the attachment is a bucket 82, the first pin 71 passes through a second pin hole 12 and is hinged to the cylinder body of the bucket cylinder 52. In this embodiment, the front frame 1 has a first pin hole 11 and a second pin hole 12, allowing the first pin 71 to optionally pass through either the first pin hole 11 or the second pin hole 12 to be hinged to the cylinder body of the bucket cylinder 52. Specifically, when the first pin 71 is selected to pass through the first pin hole 11, during the lifting process of the boom 2, the angle change of the attachment in the inward tilt state is Δα1, and the angle change of the attachment in the non-inward tilt state is Δα2. When the first pin 71 is selected to pass through the second pin hole 12, during the lifting process of the boom 2, the angle change of the attachment in the inward tilt state is Δβ1, and the angle change of the attachment in the non-inward tilt state is Δβ2, where Δα1 > Δβ1 and Δα2 < Δβ2. Therefore, in situations where the attachment needs to remain inward tilt during the lifting process of the boom 2, such as when the attachment is set as a bucket 82, the first pin 71 can be installed by passing through the second pin hole 12. In situations where the attachment needs to remain non-inward tilt during the lifting process of the boom 2, such as when the attachment is set as a flat fork 81, the first pin 71 can be installed by passing through the first pin hole 11. This device can maintain excellent translation performance during the lifting process of the boom 2, whether the attachment is tilted inward or not. In other words, the performance of the forward-rotating six-link working device is optimal when it is equipped with the horizontal fork 81 for handling and loading / unloading goods and the bucket 82 for digging, loading and transporting bulk materials. It can meet the needs of scenarios such as warehouses, logistics centers and factories that require frequent handling, as well as construction sites, mines and farms that require handling large quantities of bulk materials.
[0049] It is worth mentioning that attachment inversion means the attachment is facing inwards. Figure 1 and Figure 2 The direction of the middle arrow indicates an inward tilting motion relative to boom 2, controlled by the retraction of the cylinder rod of bucket cylinder 52; the attachment does not tilt inward, meaning the attachment remains in position. Figure 1 and Figure 2 The indicated state, not towards Figure 1 and Figure 2 Turn inward in the direction of the middle arrow.
[0050] For example, please refer to Figure 4 As shown, Figure 4 This is a dynamic simulation diagram of the angle change between the attachment of the forward-rotating six-link working device and the ground, along with the horizontal fork 81 or the bucket 82. Specifically, from 0-5s, the bucket cylinder 52 retracts, driving the horizontal fork 81 or the bucket 82 to rotate inward to -50°, and the boom cylinder 51 extends, lifting the boom 2 to the transport position; from 5-10s, the bucket cylinder 52 locks, meaning the attachment remains in the inward-rotated -50° state, the boom cylinder 51 extends, and the boom 2 is lifted to its highest position; from 10-15s, the boom cylinder 51 locks, meaning the boom 2 remains stationary, and the bucket cylinder 52 extends, driving the attachment to rotate outward to unload to 45°; from 15-20s, the bucket cylinder 52 and the boom cylinder 51 retract, and all components return to their initial positions; from 20-25s, the bucket cylinder 52 locks, and the boom cylinder 51 rises from its initial position to its highest position. In the figure, the solid line represents the angle change of the attachment when the bucket cylinder 52 is hinged to the first pin hole 11, and the dashed line represents the angle change of the attachment when the bucket cylinder 52 is hinged to the second pin hole 12. As can be seen from the figure, the angle change trends of the attachment corresponding to 5-10s and 20-25s are contradictory. Specifically, the angle change of the solid line reaches its optimum at 20-25s, where the angle fluctuation between the attachment and the ground is minimal (Δα2 < Δβ2), but it is worst at 5-10s. Conversely, the angle change of the dashed line reaches its optimum at 5-10s, where the angle change between the attachment and the ground is minimal (Δα1 > Δβ1), but it is worst at 20-25s. Therefore, the hinge of the bucket cylinder 52 to the first pin hole 11 is suitable for the working condition when the working device is equipped with the flat fork 81; the hinge of the bucket cylinder 52 to the second pin hole 12 is suitable for the working condition when the working device is equipped with the bucket 82.
[0051] For example, when the first pin 71 passes through the first pin hole 11 and is hinged to the cylinder body of the bucket cylinder 52, the angle change Δα2 of the attachment in the non-inward state during the lifting process of the boom 2 is ≤1°; when the first pin 71 passes through the second pin hole 12 and is hinged to the cylinder body of the bucket cylinder 52, the angle change Δβ1 of the attachment in the inward state during the lifting process of the boom 2 is ≤3°. Specifically, compared with... Figure 4As shown, during the 20-25s interval, when the bucket cylinder 52 locks the boom cylinder 51 for lifting, the maximum angle change Δα2 of the attachment without tilting inward is only 0.6°, which allows the flat fork 81 to transport goods very smoothly. During the 10-15s interval, the maximum angle change Δβ1 of the attachment with tilting inward is 2.3°, which ensures that the bucket 82, when fully loaded with material, does not spill or spills very little material during the lifting process when the bucket cylinder 52 locks the boom cylinder 51 for lifting.
[0052] In this embodiment, the second pin hole 12 is located below the first pin hole 11, and is positioned on the side opposite to the quick-change mechanism 6 compared to the first pin hole 11. (Refer to...) Figures 5 to 6 As shown, the lateral position of the pin hole corresponds to the horizontal coordinate of the pin hole; an increase in the lateral position corresponds to the direction of movement towards the quick-change mechanism 6. The vertical position of the pin hole corresponds to the vertical coordinate of the pin hole; an increase in the vertical position corresponds to the upward vertical movement direction. Observe... Figures 5 to 6 It can be seen that the maximum value of the angle change of the attachment retraction gradually increases with the increase of the lateral and vertical positions of the pin hole, while the maximum value of the angle change of the attachment horizontally decreases gradually with the increase of the lateral and vertical positions of the pin hole. It is evident that the stability required when using the horizontal fork 81 and the translational performance required when using the bucket 82 are contradictory. Therefore, to achieve good translational performance under the working conditions of switching between different attachments, a first pin hole 11 and a second pin hole 12 are provided on the front frame 1. The positional relationship is such that the second pin hole 12 is located below the first pin hole 11 and is positioned on the side opposite to the quick-change mechanism 6 compared to the first pin hole 11. This arrangement allows for a reasonable arrangement of the relative positions of the first pin hole 11 and the second pin hole 12, enabling the first pin shaft 71 to selectively pass through either the second pin hole 12 or the first pin hole 11. This ensures that the attachments exhibit good translational performance during the lifting process of the boom 2.
[0053] In this embodiment, the forward-rotating six-bar linkage also includes an adjusting frame 72. A first pin 71 is mounted on the adjusting frame 72, and the adjusting frame 72 is fixedly connected to the front frame 1 via a fixing member 73. The front frame 1 has a fixing hole 13. The centers of the first pin hole 11 and the second pin hole 12 are both located on a circular trajectory centered on the fixing hole 13. The fixing member 73 passes through the adjusting frame 72 and is fixedly connected to the fixing hole 13. Specifically, the first pin 71 is installed on the front frame 1 via the adjusting frame 72. When it is necessary to adjust the mounting position of the first pin 71, only the fixing member 73 needs to be removed, and then the adjusting frame 72 is swung at a certain angle to adjust the first pin 71 from aligning with the first pin hole 11 to aligning with the second pin hole 12, or vice versa. Then, the adjusting frame 72 is fixed again via the fixing member 73 to achieve the installation and fixation of the first pin 71.
[0054] Furthermore, the fastener 73 is a threaded fastener, and the fixing hole 13 is a threaded hole. The fastener 73 passes through the adjusting bracket 72 and is threadedly connected to the fixing hole 13. Specifically, the adjusting bracket 72 has a through hole 721, and the fastener 73 passes through the through hole 721 and is threadedly connected to the fixing hole 13. Optionally, the threaded fastener can be a screw or a bolt.
[0055] In this embodiment, the front frame 1 is provided with two spaced-apart mounting plates 14, each mounting plate 14 having a first pin hole 11 and a second pin hole 12 facing each other. The first pin 71 passes through and is supported on the two first pin holes 11; or the first pin 71 passes through and is supported on the two second pin holes 12. Specifically, when the attachment is a horizontal fork 81, the first pin 71 passes through and is supported on the two first pin holes 11, and the horizontal fork 81 is installed between the two mounting plates 14; when the attachment is a bucket 82, either the first pin 71 passes through and is supported on the two second pin holes 12, and the bucket 82 is installed between the two mounting plates 14. This arrangement provides support to both ends of the first pin 71, ensuring uniform and reliable force distribution and structural stability.
[0056] In this embodiment, two booms 2 are spaced apart, and boom cylinders 51 are arranged one-to-one with booms 2. A connecting frame 21 is connected to the inner side of the middle of the two booms 2. A rocker arm 3 is located between the two booms 2, and the first end of the rocker arm 3 is hinged to the connecting frame 21. Specifically, the two opposite ends of the connecting frame 21 are respectively fixed to the corresponding ends of the booms 2, that is, the two booms 2 and the connecting frame 21 are fixed as one piece, with reliable and stable strength. The rocker arm 3 is located between the two booms 2, and the first end of the rocker arm 3 is hinged to the connecting frame 21, with uniform and reliable force distribution, and the structure remains stable.
[0057] In this embodiment, a third pin hole 15 is provided on the front frame 1, and the second pin 74 passes through the third pin hole 15 and is hinged to the cylinder body of the boom cylinder 51. Specifically, a U-shaped groove mounting bracket 16 corresponding to the boom cylinder 51 is fixed on the front bracket. The two opposite sides of the groove wall of the U-shaped groove mounting bracket 16 are provided with third pin holes 15, and the second pin 74 passes through and is supported on the two third pin holes 15. With this arrangement, the cylinder body of the boom 2 cylinder is installed between the two sides of the groove wall of the two U-shaped groove mounting brackets 16, which can support both opposite ends of the second pin 74, resulting in uniform and reliable force distribution and structural stability.
[0058] This invention also provides a construction machinery. The construction machinery includes a main frame and the aforementioned forward-rotating six-link working device, with the front frame 1 fixedly mounted on the main frame. Specifically, the construction machinery includes the aforementioned forward-rotating six-link working device, which, under the condition of selecting inward tilting or non-inward tilting of the attachments, exhibits excellent translation performance during the lifting process of the boom 2. That is, the performance of the forward-rotating six-link working device in handling and loading / unloading goods with the optional horizontal fork 81 and digging, loading, and transporting bulk materials with the optional bucket 82 is optimized. It can meet the needs of scenarios requiring frequent handling, such as warehouses, logistics centers, and factories, as well as occasions requiring the handling of large quantities of bulk materials, such as construction sites, mines, and farmlands.
[0059] For example, construction machinery can be, but is not limited to, configured as a loader.
[0060] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.
Claims
1. A forward-rotating six-bar linkage working device, characterized in that, The assembly includes a front frame (1), boom (2), rocker arm (3), tie rod (4), boom cylinder (51), bucket cylinder (52), quick-change mechanism (6), first pin (71), and attachments. The quick-change mechanism (6) is used to connect the attachments. The first end of the boom (2) is hinged to the quick-change mechanism (6), and the second end of the boom (2) is hinged to the front frame (1). The first end of the rocker arm (3) is hinged to the middle of the boom (2). The first end of the tie rod (4) is hinged to the quick-change mechanism (6), and the second end of the rocker arm (3) is hinged to the second end of the tie rod (4). The cylinder body of the boom cylinder (51) is hinged to the front frame (1), and the cylinder rod is hinged to the boom (2). The cylinder rod of the bucket cylinder (52) is hinged to the middle of the rocker arm (3). The front frame (1) has a first pin hole (11) and a second pin hole (12); wherein, When the first pin (71) passes through the first pin hole (11) and is hinged to the cylinder body of the rotating bucket cylinder (52), during the lifting process of the boom (2), the angle of the attachment changes to Δα1 in the inward state and Δα2 in the non-inward state; when the first pin (71) passes through the second pin hole (12) and is hinged to the cylinder body of the rotating bucket cylinder (52), during the lifting process of the boom (2), the angle of the attachment changes to Δβ1 in the inward state and Δβ2 in the non-inward state, then Δα1>Δβ1, Δα2<Δβ2.
2. The forward-rotating six-bar linkage working device according to claim 1, characterized in that, When the first pin (71) passes through the first pin hole (11) and is hinged to the cylinder body of the rotating bucket cylinder (52), during the lifting process of the boom (2), the angle change Δα2 of the attachment in the non-inward state is ≤1°; when the first pin (71) passes through the second pin hole (12) and is hinged to the cylinder body of the rotating bucket cylinder (52), during the lifting process of the boom (2), the angle change Δβ1 of the attachment in the inward state is ≤3°.
3. The forward-rotating six-bar linkage working device according to claim 1, characterized in that, The second pin hole (12) is located below the first pin hole (11) and is located on the side opposite to the quick-change mechanism (6) compared to the first pin hole (11).
4. The forward-rotating six-bar linkage working device according to claim 1, characterized in that, The attachments include a fork (81) and a bucket (82); wherein, When the attachment is a flat fork (81), the first pin (71) passes through the first pin hole (11) and is hinged to the cylinder body of the bucket cylinder (52); when the attachment is a bucket (82), the first pin (71) passes through the second pin hole (12) and is hinged to the cylinder body of the bucket cylinder (52).
5. The forward-rotating six-bar linkage working device according to claim 1, characterized in that, It also includes an adjustment bracket (72), on which the first pin (71) is mounted, and the adjustment bracket (72) is fixedly connected to the front frame (1) by a fastener (73); wherein, The front frame (1) has a fixing hole (13). The centers of the first pin hole (11) and the second pin hole (12) are both located on a circular trajectory with the fixing hole (13) as the center. The fixing member (73) passes through the adjusting frame (72) and is fixedly connected to the fixing hole (13).
6. The forward-rotating six-bar linkage working device according to claim 5, characterized in that, The fastener (73) is a threaded fastener, the fixing hole (13) is a threaded hole, and the fastener (73) passes through the adjusting bracket (72) and is threadedly connected to the fixing hole (13).
7. The forward-rotating six-bar linkage working device according to claim 1, characterized in that, The front frame (1) is provided with two mounting plates (14) spaced apart, each mounting plate (14) having a first pin hole (11) and a second pin hole (12) directly opposite each other; wherein, The first pin (71) passes through and is supported on the two first pin holes (11); or, The first pin (71) passes through and is supported on the two second pin holes (12).
8. The forward-rotating six-bar linkage working device according to claim 1, characterized in that, Two booms (2) are spaced apart. The boom cylinder (51) is arranged in a one-to-one correspondence with the boom (2). A connecting frame (21) is connected to the inner side of the middle of the two booms (2). The rocker arm (3) is located between the two booms (2), and the first end of the rocker arm (3) is hinged to the connecting frame (21).
9. The forward-rotating six-bar linkage working device according to claim 1, characterized in that, The front frame (1) has a third pin hole (15), and the second pin (16) passes through the third pin hole (15) and is hinged to the cylinder body of the boom cylinder (51).
10. An engineering machinery, characterized in that, include: Main frame; The forward-rotating six-link working device as described in any one of claims 1-9, wherein the front frame (1) is fixedly mounted on the main frame.