Telescopic arm mechanism, telescopic arm mechanism folding method and telescopic arm vehicle

Abstract

The telescopic arm mechanism comprises a supporting base, a rocker arm with the bottom end provided with a rocker arm fulcrum and a large arm rotationally connected with the upper end of the rocker arm, a containing groove is formed in the supporting base, and a first rotating shaft connecting hole is formed in the position, close to the upper portion of the rocker arm fulcrum, of the rocker arm. The rocker arm is rotatably connected with the inner side wall of the supporting seat through a first rotating shaft connecting hole, a supporting rod is installed above the portion, close to the first rotating shaft connecting hole, in the rocker arm, and the side, away from the large arm, of the supporting rod is connected with the supporting seat through an adjusting oil cylinder; the side, away from the adjusting oil cylinder, of the large arm is connected with the supporting base through a pitching oil cylinder, and the two ends of the pitching oil cylinder are rotationally connected with the large arm and the supporting base respectively. The height of the fulcrum of the telescopic arm can be effectively reduced, so that the folding height of the telescopic arm of the whole vehicle is reduced, and the problem that a large engineering vehicle is inconvenient to use and transfer in special occasions is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of robotic arms, and in particular, to a telescopic arm mechanism, a folding method for the telescopic arm mechanism, and a telescopic arm vehicle. Background Art

[0002] In traditional telescopic arm vehicles, the fulcrum of the telescopic arm is fixed, resulting in a fixed overall height of the vehicle, which brings inconvenience in special occasions and the process of transfer transportation. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the related art to some extent. For this purpose, an object of the present invention is to provide a telescopic arm mechanism, which can effectively reduce the height of the fulcrum of the telescopic arm so as to reduce the height of the whole vehicle when the telescopic arm is folded, and solve the problem of inconvenient use and transfer of large engineering vehicles in special occasions.

[0004] In a first aspect, a telescopic arm mechanism proposed by the present invention includes a support base, a rocker arm having a rocker arm fulcrum opened at the bottom end, and a boom rotatably connected to the upper end of the rocker arm. An accommodation groove is opened inside the support base. Above the rocker arm near the rocker arm fulcrum, there is a first rotating shaft connection hole. The rocker arm is rotatably connected to the inner side wall of the support base through the first rotating shaft connection hole. Above the first rotating shaft connection hole near the inside of the rocker arm, a support rod is installed. The side of the support rod away from the boom is connected to the support base through an adjusting oil cylinder. Two ends of the adjusting oil cylinder are respectively rotatably connected to the support rod and the support base. The side of the boom away from the adjusting oil cylinder is connected to the support base through a pitching oil cylinder. Two ends of the pitching oil cylinder are respectively rotatably connected to the boom and the support base. When the pitching oil cylinder retracts to a preset length state, the rocker arm can rotate along the first rotating shaft connection hole. A fulcrum fixing hole is opened on the side wall of the support base. A limiting component for restricting the rotation of the rocker arm so that the rocker arm fulcrum and the fulcrum fixing hole are aligned is provided at a position inside the support base near the fulcrum fixing hole. A fulcrum fixing component for fixing the rocker arm fulcrum and the fulcrum fixing hole is provided at a position near the rocker arm fulcrum at the bottom end of the support base. The fulcrum fixing component is detachably connected between the rocker arm fulcrum and the fulcrum fixing hole.

[0005] Preferably, the fulcrum fixing component includes a pin cylinder having telescopic ends at both ends. The two ends of the pin cylinder are arranged opposite to the fulcrum fixing hole. The fixed end of the pin cylinder is fixed to the support base through a pin cylinder fixing plate. Locking pins adapted to the apertures of the rocker arm fulcrum and the fulcrum fixing hole are installed at the telescopic ends of both ends of the pin cylinder.

[0006] Preferably, when the pitching oil cylinder retracts to a preset length and the rocker arm can rotate along the first rotating shaft connection hole, a parallelogram is formed by the four points of the first rotating shaft connection hole, the rocker arm, the rotatable connection point between the boom and the pitching oil cylinder ends respectively connected to the boom and the support base.

[0007] Preferably, when the rocker arm can rotate along the first rotating shaft connection hole, the pitching oil cylinder is in the reset starting state and the telescopic end of the pitching oil cylinder does not extend.

[0008] Preferably, the limiting component includes a bottom mounting block and a limiting block. The bottom mounting block is connected to the inner wall of the support base. The limiting block is arranged on the side of the bottom mounting block close to the rocker arm. The inclined surface on the side of the limiting block close to the rocker arm is adapted to the inclined surface opposite when the rocker arm rotates to the state where the rocker arm fulcrum and the fulcrum fixing hole are aligned.

[0009] Preferably, the bottom mounting block is connected to the limiting block through multiple groups of adjusting bolts. An internal mounting block is arranged on the side of the limiting block close to the inner wall of the support base. The internal mounting block is connected to the inner wall of the support base. The limiting block is abutted and fixed to the internal mounting block through a fixing bolt.

[0010] Preferably, rotating connectors are arranged at both the connection position between the rocker arm and the first rotating shaft connection hole and the connection position between the rocker arm and the boom.

[0011] In a second aspect, a folding method for a telescopic boom mechanism proposed by the present invention includes any one of the above telescopic boom mechanism solutions. The steps of the folding method for the telescopic boom mechanism are as follows: S1: The boom moves. After the boom retracts and resets, step S2 is executed; S2: The pitching oil cylinder moves. The pitching oil cylinder retracts to a preset length, and step S3 is executed; S3: The pin oil cylinder moves. The pin oil cylinder retracts to drive the locking pin to separate from the rocker arm fulcrum and the fulcrum fixing hole. The pin oil cylinder retracts to a preset length, and step S4 is executed; S4: The adjusting oil cylinder moves. The adjusting oil cylinder retracts to pull the rocker arm to rotate counterclockwise along the first rotating shaft connection hole. The boom and the rocker arm gradually retract and fold into the storage groove. The adjusting oil cylinder retracts to a preset length, and the folding of the telescopic boom mechanism is completed.

[0012] Preferably, in step S4, the triggering condition for the adjusting oil cylinder to move is that the pitching oil cylinder retracts to a preset length and at the same time the pin oil cylinder retracts to a preset length.

[0013] In a third aspect, a telescopic boom vehicle proposed by the present invention includes any one of the above telescopic boom mechanism solutions.

[0014] The beneficial effects of the present invention are as follows: The fulcrum of the telescopic arm is separable. When the telescopic arm is folded, by separating the fulcrum of the telescopic arm, the height when the telescopic arm folding is completed can be further reduced, which is convenient for the use and transportation of large engineering vehicles in special occasions; During the use of the telescopic arm, by adjusting the elongation of the oil cylinder to drive the rocker arm to rotate, the rocker arm fulcrum and the fulcrum fixing hole are aligned, and then the locking pin is driven by the pin oil cylinder to fix the fulcrum, which will not affect the normal use of the telescopic arm; The alignment point of the rocker arm fulcrum and the fulcrum fixing hole is positioned by the limit component, which is convenient for use; The telescopic arm mechanism has a simple structure and the operation process of the telescopic arm mechanism folding method is simple, which is convenient for users to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In the drawings: Figure 1 FIG. is a schematic structural diagram of a telescopic arm mechanism of the present invention in the state of the boom being extended.

[0016] Figure 2 FIG. is a schematic structural diagram of the telescopic arm mechanism of the present invention in the state of the boom being retracted and reset.

[0017] Figure 3 FIG. is a schematic structural diagram of the telescopic arm mechanism of the present invention in the state of being folded and stored.

[0018] Figure 4 FIG. is a half-sectional view of the inside of the support seat of the telescopic arm mechanism of the present invention near the connection of the rocker arm.

[0019] Figure 5 FIG. is a half-sectional view of the inside of the support seat of the telescopic arm mechanism of the present invention near the adjusting oil cylinder.

[0020] Figure 6 FIG. is a partial enlarged view of the inside of the telescopic arm mechanism of the present invention near the pin oil cylinder part.

[0021] Figure 7 FIG. is a partial enlarged view of the inside of the telescopic arm mechanism of the present invention at the rocker arm and the limit component.

[0022] Figure 8 FIG. is a partial enlarged view of the limit component inside the telescopic arm mechanism of the present invention.

[0023] In the figure: 1 - support base, 2 - storage groove, 3 - pitching oil cylinder, 4 - boom, 5 - rotating connecting piece, 6 - rocker arm, 7 - adjusting oil cylinder, 8 - first rotating shaft, 9 - fulcrum fixing hole, 10 - pin oil cylinder, 11 - support rod, 12 - rocker arm fulcrum, 13 - pin oil cylinder fixing plate, 14 - locking pin, 15 - limiting component, 16 - internal mounting block, 17 - bottom mounting block, 18 - adjusting bolt, 19 - limiting block, 20 - fixing bolt. Specific implementation mode

[0024] Referring to Figure 1 , Figure 2 and Figure 3 , a telescopic arm mechanism proposed by the present invention includes a support base 1, a rocker arm 6 with a rocker arm fulcrum 12 opened at the bottom end, and a boom 4 rotatably connected to the upper end of the rocker arm 6. A storage groove 2 is opened inside the support base 1. Above the rocker arm 6 near the rocker arm fulcrum 12, there is a first rotating shaft connection hole. The rocker arm 6 is rotatably connected to the inner side wall of the support base 1 through the first rotating shaft connection hole. Referring to Figure 5 , a support rod 11 is installed above the first rotating shaft connection hole inside the rocker arm 6. The side of the support rod 11 away from the boom 4 is connected to the support base 1 through an adjusting oil cylinder 7. Both ends of the adjusting oil cylinder 7 are rotatably connected to the support rod 11 and the support base 1 respectively. Referring to Figure 4 , the side of the boom 4 away from the adjusting oil cylinder 7 is connected to the support base 1 through a pitching oil cylinder 3. Both ends of the pitching oil cylinder 3 are rotatably connected to the boom 4 and the support base 1 respectively. When the pitching oil cylinder 3 retracts to the preset length state, the rocker arm 6 can rotate along the first rotating shaft connection hole. A fulcrum fixing hole 9 is opened on the side wall of the support base 1; Referring to Figure 6 and Figure 7 , a limiting component 15 for restricting the rotation of the rocker arm 6 so that the rocker arm fulcrum 12 and the fulcrum fixing hole 9 are aligned is provided at a position inside the support base 1 near the fulcrum fixing hole 9. A fulcrum fixing component for fixing the rocker arm fulcrum 12 and the fulcrum fixing hole 9 is provided at a position near the rocker arm fulcrum 12 at the bottom end of the support base 1. The fulcrum fixing component is detachably connected between the rocker arm fulcrum 12 and the fulcrum fixing hole 9.

[0025] Obviously, based on the above, when the pitching oil cylinder 3 retracts to the preset length state, the telescopic adjustment of the adjusting oil cylinder 7 can drive the rocker arm 6 to rotate along the first rotating shaft connection hole, so that the rocker arm fulcrum 12 and the fulcrum fixing hole 9 can be aligned or separated. When the rocker arm fulcrum 12 and the fulcrum fixing hole 9 are aligned, the adjusting oil cylinder 7 extends, and the rocker arm 6 rotates clockwise along the first rotating shaft connection hole. The limiting component 15 restricts the rotation of the rocker arm 6 to ensure that the rocker arm fulcrum 12 and the fulcrum fixing hole 9 are completely aligned, facilitating the fixing of the fulcrum by the fulcrum fixing component. When the telescopic arm folds, the fulcrum fixing component separates from the fulcrum, the adjusting oil cylinder 7 retracts, and the rocker arm 6 rotates counterclockwise along the first rotating shaft connection hole, and the boom 4 and the rocker arm 6 are folded into the storage groove 2.

[0026] In this embodiment, referring to Figure 6 , the fulcrum fixing component includes a pin cylinder 10 with telescopic ends at both ends. The two ends of the pin cylinder 10 are arranged opposite to the fulcrum fixing hole 9. The fixed end of the pin cylinder 10 is fixed to the support base 1 through a pin cylinder fixing plate 13. Locking pins 14 adapted to the apertures of the rocker arm fulcrum 12 and the fulcrum fixing hole 9 are installed at the telescopic ends of both ends of the pin cylinder 10.

[0027] Obviously, based on the above, the telescopic movement of the telescopic ends at both ends of the pin cylinder 10 can drive the locking pins 14 to fix or separate the rocker arm fulcrum 12 and the fulcrum fixing hole 9, thereby realizing the specified fixing or separating function of the telescopic arm.

[0028] In this embodiment, referring to Figure 2 , when the pitching oil cylinder 3 retracts to the preset length and the rocker arm 6 can rotate along the first rotating shaft connection hole, the figure formed by enclosing the first rotating shaft connection hole, the rotatable connection point between the rocker arm 6 and the boom 4, and the connection points at both ends of the pitching oil cylinder 3 with the boom 4 and the support base 1 respectively is a parallelogram.

[0029] Obviously, based on the above, the telescopic adjustment of the adjusting oil cylinder 7 can drive the deformation of the above quadrilateral, so that the boom 4 and the rocker arm 6 move, realizing the extension or folding function of the boom 4 and the rocker arm 6.

[0030] In this embodiment, referring to Figure 2 , when the rocker arm 6 can rotate along the first rotating shaft connection hole, the pitching oil cylinder 3 is in the reset starting state, and the telescopic end of the pitching oil cylinder 3 does not extend.

[0031] Obviously, based on the above, setting the reset starting state of the pitching oil cylinder 3 as the length of the pitching oil cylinder 3 when the rocker arm 6 can rotate along the first rotating shaft connection hole is convenient for the operator to operate.

[0032] In this embodiment, referring to Figure 8, the limiting component 15 includes a bottom mounting block 17 and a limiting block 19. The bottom mounting block 17 is connected to the inner wall of the support base 1. The limiting block 19 is arranged on the side of the bottom mounting block 17 close to the rocker arm 6. The inclined surface on the side of the limiting block 19 close to the rocker arm 6 is adapted to the inclined surface opposite to the rocker arm 6 when the rocker arm 6 rotates to the state where the rocker arm fulcrum 12 and the fulcrum fixing hole 9 are aligned.

[0033] Obviously, based on the above, through the setting of the limiting block 19, the positioning of the rocker arm fulcrum 12 and the fulcrum fixing hole 9 can be quickly realized.

[0034] In this embodiment, referring to Figure 8 , the bottom mounting block 17 is connected to the limiting block 19 through a plurality of groups of adjusting bolts 18. An internal mounting block 16 is arranged on the side of the limiting block 19 close to the inner wall of the support base 1. The internal mounting block 16 is connected to the inner wall of the support base 1. The limiting block 19 is abutted and fixed to the internal mounting block 16 through a fixing bolt 20.

[0035] Obviously, based on the above, the position of the limiting block 19 can be adjusted through the adjusting bolts 18, which can effectively solve the problem of inaccurate positioning caused by the position drop of the limiting block 19 due to long-term wear. The position and angle of the limiting block 19 can be adjusted within a certain range through the expansion and contraction of the plurality of adjusting bolts 18, and finally the limiting block 19 is locked by the fixing bolt 20 to complete the adjustment.

[0036] In this embodiment, referring to Figure 1 and Figure 7 , rotating connectors 5 are arranged at both the connection position of the rocker arm 6 and the first rotating shaft connection hole and the connection position of the rocker arm 6 and the boom 4.

[0037] Obviously, based on the above, the setting of the rotating connectors 5 can greatly enhance the rotatability and strength of the rotating part.

[0038] As another embodiment of the present application, this embodiment proposes a telescopic arm mechanism folding method. Referring to Figures 1 to 3 , including any one of the above telescopic arm mechanism solutions, the steps of the telescopic arm mechanism folding method are as follows: S1: The boom 4 moves. After the boom 4 retracts and resets, step S2 is executed; S2: The pitching oil cylinder 3 moves. The pitching oil cylinder 3 retracts to a preset length, and step S3 is executed; S3: The pin oil cylinder 10 moves. The pin oil cylinder 10 retracts to drive the locking pin 14 to separate from the rocker arm fulcrum 12 and the fulcrum fixing hole 9. The pin oil cylinder 10 retracts to a preset length, and step S4 is executed; S4: The adjusting oil cylinder 7 moves. The adjusting oil cylinder 7 retracts to pull the rocker arm 6 to rotate counterclockwise along the first rotating shaft connection hole. The boom 4 and the rocker arm 6 gradually retract and fold into the storage groove 2. The adjusting oil cylinder 7 retracts to a preset length, and the telescopic arm mechanism folding is completed.

[0039] Obviously, based on the above, through the coordinated operation of the pitching oil cylinder 3, the pin oil cylinder 10, and the adjusting oil cylinder 7, the folding of the telescopic boom mechanism and the separation of the telescopic boom fulcrum can be achieved.

[0040] In this embodiment, referring to Figure 2 , in step S4, the triggering condition for the action of the adjusting oil cylinder 7 is that the pitching oil cylinder 3 retracts to a preset length and at the same time the pin oil cylinder 10 retracts to a preset length.

[0041] Obviously, based on the above, it is to prevent component damage caused by the action of the adjusting oil cylinder 7 due to the pitching oil cylinder 3 and the pin oil cylinder 10 not being in place.

[0042] As another embodiment of the present application, this embodiment proposes a telescopic boom vehicle, including any one of the above telescopic boom mechanism solutions.

[0043] Obviously, based on the above, the height of the vehicle can be further reduced when the telescopic boom is folded, which is convenient for large engineering vehicles to be used and transported in special occasions.

[0044] To more clearly illustrate the solutions and effects of this embodiment, an example is given in combination with the accompanying drawings: Referring to the attached Figures 1 - 8 , when the telescopic boom changes from the extended state to the folded state, as Figure 1 shown, first the boom 4 retracts, and the pitching oil cylinder 3 retracts to as Figure 2 shown, then the pin oil cylinder 10 drives the locking pin 14 to separate from the rocker arm fulcrum 12 and the fulcrum fixing hole 9, and then the adjusting oil cylinder 7 retracts, driving the rocker arm 6 to rotate counterclockwise along the first rotating shaft connection hole, and the boom 4 and the rocker arm 6 are folded into the storage groove 2, as Figure 3 shown; When the telescopic boom changes from the folded state to the state where the fulcrum needs to be fixed, the adjusting oil cylinder 7 extends to make the rocker arm 6 rotate clockwise along the first rotating shaft connection hole, as Figure 4 shown, and the limiting component 15 restricts the rotation of the rocker arm 6 to ensure that the rocker arm fulcrum 12 and the fulcrum fixing hole 9 are completely aligned, as Figure 5 shown, then the pin oil cylinder 10 drives the locking pin 14 to insert into the rocker arm fulcrum 12 and the fulcrum fixing hole 9 to complete the fixing of the fulcrum of the telescopic boom, as Figure 6 , Figure 7 shown.

Claims

1. A telescopic arm mechanism, characterized in that: The invention comprises a support seat (1), a rocker arm (6) having a rocker arm fulcrum (12) at the bottom end thereof, and a large arm (4) rotatably connected to the upper end of the rocker arm (6); a storage groove (2) is provided inside the support seat (1); a first rotating shaft connecting hole is provided above the rocker arm (6) near the rocker arm fulcrum (12); the rocker arm (6) is rotatably connected to the inner side wall of the support seat (1) through the first rotating shaft connecting hole; a support rod (11) is installed above the rocker arm (6) near the first rotating shaft connecting hole; a side of the support rod (11) away from the large arm (4) is connected to the support seat (1) through an adjusting cylinder (7); two ends of the adjusting cylinder (7) are rotatably connected to the support rod (11) and the support seat (1); a side of the large arm (4) away from the adjusting cylinder (7) is connected to the adjusting cylinder (7) through a pitching cylinder (3). The support seat (1) is connected to the support seat (1), and the two ends of the pitch cylinder (3) are rotatably connected to the large arm (4) and the support seat (1). When the pitch cylinder (3) is retracted to a preset length, the rocker arm (6) can rotate along the first shaft connection hole. The side wall of the support seat (1) is provided with a fulcrum fixing hole (9). The support seat (1) is provided with a position near the fulcrum fixing hole (9) inside the support seat (1) for limiting the rotation of the rocker arm (6) so that the rocker arm fulcrum (12) and the fulcrum fixing hole (9) are aligned. The bottom end of the support seat (1) is provided with a fulcrum fixing component for fixing the rocker arm fulcrum (12) and the fulcrum fixing hole (9). The fulcrum fixing component is detachably connected to the rocker arm fulcrum (12) and the fulcrum fixing hole (9).

2. A telescopic arm mechanism according to claim 1, characterized in that: The fulcrum fixing assembly comprises a latch cylinder (10) having telescopic ends at both ends, the two ends of the latch cylinder (10) being arranged opposite to the fulcrum fixing hole (9), the fixed end of the latch cylinder (10) being fixed to the support seat (1) via a latch cylinder fixing plate (13), and the telescopic ends at both ends of the latch cylinder (10) being installed with locking pins (14) matching the apertures of the rocker arm fulcrum (12) and the fulcrum fixing hole (9).

3. The telescopic arm mechanism according to claim 1, characterized in that: When the pitch cylinder (3) is retracted to a preset length and the rocker arm (6) is rotatable along the first rotating shaft connection hole, the first rotating shaft connection hole, the rotatable connection point between the rocker arm (6) and the boom (4), and the connection points between the two ends of the pitch cylinder (3) and the boom (4) and the support seat (1) form a parallelogram.

4. A telescopic arm mechanism according to claim 3, characterized in that: When the rocker arm (6) is in a state where it can rotate along the first rotating shaft connection hole, the pitch oil cylinder (3) is in a reset initial state, and the telescopic end of the pitch oil cylinder (3) is not extended.

5. The telescopic arm mechanism according to claim 1, characterized in that: The limit assembly (15) comprises a bottom mounting block (17) and a limit block (19); the bottom mounting block (17) is connected to the inner wall of the support seat (1); the limit block (19) is arranged on a side of the bottom mounting block (17) close to the rocker arm (6); an inclined surface on one side of the limit block (19) close to the rocker arm (6) is adapted to an inclined surface opposite to the rocker arm (6) when the rocker arm (6) is rotated to align the rocker arm fulcrum (12) with the fulcrum fixing hole (9).

6. A telescopic arm mechanism according to claim 5, characterized in that: The bottom mounting block (17) is connected to the limit block (19) via a plurality of sets of adjustment bolts (18); an internal mounting block (16) is provided on a side of the limit block (19) close to the inner wall of the support seat (1); the internal mounting block (16) is connected to the inner wall of the support seat (1); and the limit block (19) is abutted and fixed to the internal mounting block (16) via fixing bolts (20).

7. The telescopic arm mechanism according to claim 1, characterized in that: The rocker arm (6) is provided with a rotating connection piece (5) at a connection position between the first rotating shaft connection hole and the support seat (1) and at a connection position between the rocker arm (6) and the upper arm (4).

8. A telescopic arm mechanism folding method, characterized in that: The telescopic arm mechanism comprises any one of claims 1 to 7, wherein the steps of the folding method of the telescopic arm mechanism are as follows: S1: The boom (4) moves, the boom (4) is retracted and reset, and step S2 is executed; S2: the pitch cylinder (3) is actuated, the pitch cylinder (3) is retracted to a preset length, and step S3 is executed; S3: the latch cylinder (10) is actuated, the latch cylinder (10) retracts to drive the locking pin (14) to separate from the rocker arm fulcrum (12) and the fulcrum fixing hole (9), the latch cylinder (10) retracts to a preset length, and step S4 is executed; S4: the regulating cylinder (7) is actuated, the regulating cylinder (7) retracts and pulls the rocker arm (6) to rotate counterclockwise along the first rotating shaft connection hole, the upper arm (4) and the rocker arm (6) gradually retract and fold into the storage groove (2), the regulating cylinder (7) retracts to a preset length, and the telescopic arm mechanism is folded.

9. A telescopic arm mechanism folding method, characterized in that: In step S4, the triggering condition for the action of the regulating cylinder (7) is that the pitch cylinder (3) retracts to a preset length and the latch cylinder (10) retracts to a preset length at the same time.

10. A telescopic boom vehicle, characterized in that: It comprises a telescopic arm mechanism as described in any one of claims 1 to 7.

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