Telescopic arm mechanism and telescopic arm vehicle

Abstract

The utility model discloses a telescopic arm mechanism which comprises a supporting seat, a rocker arm with the bottom end provided with a rocker arm fulcrum and a big arm rotationally connected with the upper end of the rocker arm, a containing groove is formed in the supporting seat, and a first rotating shaft connecting hole is formed in the upper portion, close to 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 utility model relates to mechanical arm technical field especially relates to a telescopic arm mechanism and telescopic arm vehicle. BACKGROUND

[0002] The traditional telescopic arm vehicle, the fulcrum of telescopic arm is fixed, causes the overall height of vehicle fixed, brings the inconvenience in the special occasion and the transport process of the field. SUMMARY

[0003] The utility model aims at at least in a certain extent solves one of the technical problems among the prior art. For this reason, one purpose of the utility model is in order to propose a telescopic arm mechanism, can effectively reduce telescopic arm fulcrum height and reduce the height when folding of whole car telescopic arm, solves the problem of large engineering vehicle in special occasion use, transport inconvenient.

[0004] Firstly, the utility model discloses a telescopic arm mechanism, including support seat, the swing arm that has opened the swing arm fulcrum at bottom end and with the big arm rotatable connection on swing arm upper end, the inside of support seat is opened and has the storage groove, the first pivot connection hole that is equipped with in the upper side of swing arm near swing arm fulcrum, swing arm is rotatable connection with the inside lateral wall of support seat through first pivot connection hole, the support rod is installed in the upper side of swing arm inside near first pivot connection hole, the side that is away from big arm of support rod is connected with support seat through adjusting oil cylinder, the both ends of adjusting oil cylinder are rotatable connection with support rod and support seat respectively, the side that is away from adjusting oil cylinder of big arm is connected with support seat through pitch oil cylinder, the both ends of pitch oil cylinder are rotatable connection with big arm and support seat respectively, when pitch oil cylinder retracts to the state of pre-set length, swing arm can rotate along first pivot connection hole, the lateral wall of support seat is opened and has the fulcrum fixed hole, the position that is equipped with the limiting component for limiting swing arm rotation in the inside of support seat near fulcrum fixed hole makes swing arm fulcrum and fulcrum fixed hole align, the position that is equipped with the fulcrum fixed component for fixing swing arm fulcrum and fulcrum fixed hole in the bottom end of support seat near swing arm fulcrum, the fulcrum fixed component and swing arm fulcrum and fulcrum fixed hole are between the separate type connection.

[0005] Preferably, the fulcrum fixed component includes a latch cylinder with telescopic ends at both ends, the both ends of the latch cylinder are arranged opposite to the fulcrum fixed hole, the fixed end of the latch cylinder is fixed with the support seat through a latch cylinder fixing plate, the telescopic ends at both ends of the latch cylinder are both installed with locking pins matched with the hole diameters of the swing arm fulcrum and the fulcrum fixed hole.

[0006] Preferably, the pitch oil cylinder is retracted to a preset length, and the swing arm is rotatable along the first pivot connecting hole, and the first pivot connecting hole, the rotatable connecting point of the swing arm and the large arm, and the connecting points of the two ends of the pitch oil cylinder and the large arm and the support base form a parallelogram.

[0007] Preferably, the swing arm is rotatable along the first pivot connecting hole, and the pitch oil cylinder is in a reset initial state, and the telescopic end of the pitch oil cylinder is not extended.

[0008] Preferably, the limiting assembly comprises a bottom mounting block and a limiting block, the bottom mounting block is connected with the inner wall of the support base, the limiting block is arranged on one side of the bottom mounting block close to the swing arm, and the side close to the swing arm of the limiting block is matched with the opposite side of the swing arm in the state that the swing arm is rotated to the swing arm fulcrum and the fulcrum fixing hole are aligned.

[0009] Preferably, the bottom mounting block is connected with the limiting block through a plurality of groups of adjusting bolts, one side of the limiting block close to the inner wall of the support base is provided with an inner mounting block, the inner mounting block is connected with the inner wall of the support base, and the limiting block is fixed in abutment with the inner mounting block through fixing bolts.

[0010] Preferably, the swing arm is provided with a rotating connecting piece at the position where the first pivot connecting hole and the support base are connected and at the position where the swing arm and the large arm are connected.

[0011] In the second aspect, the utility model provides a folding method of a telescopic arm mechanism, containing any one of the above telescopic arm mechanisms, and the folding method of the telescopic arm mechanism comprises the following steps:

[0012] S1: the large arm is actuated to be retracted and reset, and step S2 is performed;

[0013] S2: the pitch oil cylinder is actuated to be retracted to a preset length, and step S3 is performed;

[0014] S3: the bolt oil cylinder is actuated to be retracted to separate the locking pin from the swing arm fulcrum and the fulcrum fixing hole, and the bolt oil cylinder is retracted to a preset length, and step S4 is performed;

[0015] S4: the adjusting oil cylinder is actuated to be retracted to rotate the swing arm counterclockwise along the first pivot connecting hole, the large arm and the swing arm are gradually retracted and folded into the storage groove, the adjusting oil cylinder is retracted to a preset length, and the telescopic arm mechanism is folded.

[0016] Preferably, in step S4, the actuating condition of the adjusting oil cylinder is that the pitch oil cylinder is retracted to a preset length and the bolt oil cylinder is retracted to a preset length.

[0017] In a third aspect, the utility model provides a telescopic arm vehicle, contain above telescopic arm mechanism any one scheme.

[0018] The utility model discloses the beneficial effect is:

[0019] The fulcrum of telescopic arm can be separated, when telescopic arm is folded, through the fulcrum separation of telescopic arm, can further reduce the height when telescopic arm folding is completed, facilitates the use of large engineering vehicle in special occasion and transfer;

[0020] During the use of telescopic arm, the oil cylinder is adjusted to drive the rocker arm to rotate, the rocker arm fulcrum and the fulcrum fixed hole are aligned, then the locking pin oil cylinder drives the locking pin to fix the fulcrum, and the normal use of telescopic arm is not affected.

[0021] The rocker arm fulcrum and the fulcrum fixed hole alignment point are positioned through the limiting assembly, which is convenient to use.

[0022] The telescopic arm mechanism is simple in structure, and the telescopic arm mechanism folding method is simple in operation process, so that the user can use it conveniently. BRIEF DESCRIPTION OF DRAWINGS

[0023] In the drawings:

[0024] Figure 1 The utility model provides a telescopic arm mechanism big arm structure schematic diagram under the state of extension.

[0025] Figure 2 The utility model provides a telescopic arm mechanism big arm structure schematic diagram under the state of recovery reset.

[0026] Figure 3 The utility model provides a telescopic arm mechanism structure schematic diagram under the state of folding storage.

[0027] Figure 4 The utility model provides a telescopic arm mechanism support seat inside half -view drawing close to the connecting place of rocker arm.

[0028] Figure 5 The utility model provides a telescopic arm mechanism support seat inside half -view drawing close to the adjusting oil cylinder.

[0029] Figure 6 The utility model provides a telescopic arm mechanism inside close -up view of the part of the locking pin oil cylinder.

[0030] Figure 7 The utility model provides a telescopic arm mechanism inside close -up view of the part of rocker arm and limiting assembly.

[0031] Figure 8 The utility model provides a telescopic arm mechanism inside close -up view of the part of limiting assembly.

[0032] Figure: 1 - support seat, 2 - storage groove, 3 - tilt cylinder, 4 - large arm, 5 - rotating connecting piece, 6 - rocker arm, 7 - adjusting cylinder, 8 - first rotating shaft, 9 - fulcrum fixing hole, 10 - bolt cylinder, 11 - support rod, 12 - rocker arm fulcrum, 13 - bolt cylinder fixing plate, 14 - locking pin, 15 - limiting assembly, 16 - inner mounting block, 17 - bottom mounting block, 18 - adjusting bolt, 19 - limiting block, 20 - fixing bolt. DETAILED DESCRIPTION

[0033] Referring to Figure 1 , Figure 2 and Figure 3 , the telescopic arm mechanism provided by the application comprises a support seat 1, a rocker arm 6 provided with a rocker arm fulcrum 12 at the bottom end, and a large arm 4 rotatably connected to the upper end of the rocker arm 6. The support seat 1 is internally provided with a storage groove 2. The rocker arm 6 is provided with a first rotating shaft connecting hole above 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. Referring to Figure 5 , a support rod 11 is mounted inside the rocker arm 6 above the first rotating shaft connecting hole. The side of the support rod 11 away from the large arm 4 is connected to the support seat 1 through an adjusting cylinder 7. The two ends of the adjusting cylinder 7 are rotatably connected to the support rod 11 and the support seat 1, respectively. Referring to Figure 4 , the side of the large arm 4 away from the adjusting cylinder 7 is connected to the support seat 1 through a tilt cylinder 3. The two ends of the tilt cylinder 3 are rotatably connected to the large arm 4 and the support seat 1, respectively. When the tilt cylinder 3 is retracted to a preset length, the rocker arm 6 can rotate along the first rotating shaft connecting hole. The side wall of the support seat 1 is provided with a fulcrum fixing hole 9.

[0034] Referring to Figure 6 and Figure 7 , the support seat 1 is provided with a limiting assembly 15 inside the position close to the fulcrum fixing hole 9 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 assembly close to the position of the rocker arm fulcrum 12 for fixing the rocker arm fulcrum 12 and the fulcrum fixing hole 9. The fulcrum fixing assembly is connected to the rocker arm fulcrum 12 and the fulcrum fixing hole 9 in a separated manner.

[0035] Obviously, based on the above, when the luffing oil cylinder 3 is retracted to the preset length, the extension and retraction of the adjusting oil cylinder 7 can drive the rocker arm 6 to rotate along the first pivot connecting 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 is extended, the rocker arm 6 rotates clockwise along the first pivot connecting hole, the limiting assembly 15 limits the rotation of the rocker arm 6, ensures that the rocker arm fulcrum 12 and the fulcrum fixing hole 9 are completely aligned, and facilitates the fulcrum fixing assembly to fix the fulcrum. When the telescopic arm is folded, the fulcrum fixing assembly is separated from the fulcrum, the adjusting oil cylinder 7 is retracted, the rocker arm 6 rotates counterclockwise along the first pivot connecting hole, and the large arm 4 and the rocker arm 6 are folded into the storage slot 2.

[0036] In the embodiment, referring to Figure 6 , the fulcrum fixing assembly comprises a latch oil cylinder 10 with telescopic ends at both ends. The two ends of the latch oil cylinder 10 are opposite the fulcrum fixing hole 9. The fixed end of the latch oil cylinder 10 is fixed to the support base 1 through a latch oil cylinder fixing plate 13. The telescopic ends of the two ends of the latch oil cylinder 10 are both provided with a locking pin 14 which is matched with the hole diameter of the rocker arm fulcrum 12 and the fulcrum fixing hole 9.

[0037] Obviously, based on the above, the extension and retraction of the telescopic ends of the latch oil cylinder 10 can drive the locking pin 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.

[0038] In the embodiment, referring to Figure 2 , when the luffing oil cylinder 3 is retracted to the preset length and the rocker arm 6 can rotate along the first pivot connecting hole, the first pivot connecting hole, the rotating connection point of the rocker arm 6 and the large arm 4, and the connection points of the two ends of the luffing oil cylinder 3 and the large arm 4 and the support base 1 form a parallelogram.

[0039] Obviously, based on the above, the extension and retraction of the adjusting oil cylinder 7 can cause the above-mentioned quadrilateral to deform, thereby causing the large arm 4 and the rocker arm 6 to move and realizing the extension or folding function of the large arm 4 and the rocker arm 6.

[0040] In the embodiment, referring to Figure 2 , when the rocker arm 6 can rotate along the first pivot connecting hole, the luffing oil cylinder 3 is in a reset initial state, and the telescopic end of the luffing oil cylinder 3 is not extended.

[0041] Obviously, based on the above, the length of the luffing oil cylinder 3 in the reset initial state is set as the length of the luffing oil cylinder 3 when the rocker arm 6 can rotate along the first pivot connecting hole, which is convenient for the operator to operate.

[0042] In the embodiment, referring to Figure 8The limiting assembly 15 comprises a bottom mounting block 17 and a limiting block 19, the bottom mounting block 17 is connected with the inner wall of the support base 1, the limiting block 19 is arranged on one side of the bottom mounting block 17 close to the rocker arm 6, and the side of the limiting block 19 close to the rocker arm 6 is matched with the side of the rocker arm 6 opposite to the side in the state that the rocker arm 6 is rotated to align the rocker fulcrum 12 and the fulcrum fixing hole 9.

[0043] Obviously, based on the above, the positioning of the rocker fulcrum 12 and the fulcrum fixing hole 9 can be quickly realized through the arrangement of the limiting block 19.

[0044] In the embodiment, referring to Figure 8 , the bottom mounting block 17 is connected with the limiting block 19 through a plurality of adjusting bolts 18, one side of the limiting block 19 close to the inner wall of the support base 1 is provided with an inner mounting block 16, the inner mounting block 16 is connected with the inner wall of the support base 1, and the limiting block 19 is fixed in abutment with the inner mounting block 16 through a fixing bolt 20.

[0045] Obviously, based on the above, the position of the limiting block 19 can be adjusted through the adjusting bolt 18, and the problem that the position of the limiting block 19 is lowered due to long-term wear and the positioning is inaccurate can be effectively solved, the position and angle of the limiting block 19 can be adjusted within a certain range through the extension and contraction of the plurality of adjusting bolts 18, and finally the limiting block 19 is locked by the fixing bolt 20, and the adjustment is completed.

[0046] In the embodiment, referring to Figure 1 and Figure 7 , the rocker arm 6 is provided with the rotary connecting piece 5 at the position where the first rotary shaft connecting hole is connected with the support base 1 and the position where the rocker arm 6 is connected with the large arm 4.

[0047] Obviously, based on the above, the rotatability and strength of the rotating part can be greatly improved through the arrangement of the rotary connecting piece 5.

[0048] As another embodiment of the utility model, the embodiment provides a telescopic arm mechanism folding method, referring to Figures 1 to 3 , the telescopic arm mechanism folding method comprises the telescopic arm mechanism according to any one of the above schemes, and the steps of the telescopic arm mechanism folding method are as follows.

[0049] S1: the large arm 4 is actuated, the large arm 4 is retracted to reset, and step S2 is performed;

[0050] S2: the luffing oil cylinder 3 is actuated, the luffing oil cylinder 3 is retracted to a preset length, and step S3 is performed;

[0051] S3: the latch oil cylinder 10 is actuated, the latch oil cylinder 10 is retracted to drive the locking pin 14 to separate from the rocker fulcrum 12 and the fulcrum fixing hole 9, the latch oil cylinder 10 is retracted to a preset length, and step S4 is performed;

[0052] S4: Adjust the action of the hydraulic cylinder 7. The hydraulic cylinder 7 retracts and pulls the rocker arm 6 to rotate counterclockwise along the first rotating shaft connection hole. The main arm 4 and the rocker arm 6 gradually retract and fold into the storage slot 2. The hydraulic cylinder 7 retracts to the preset length, and the telescopic arm mechanism is folded.

[0053] Obviously, based on the above, the folding of the telescopic arm mechanism and the separation of the telescopic arm fulcrum can be achieved by the coordinated operation of the pitch cylinder 3, the pin cylinder 10 and the adjusting cylinder 7.

[0054] In this embodiment, refer to Figure 2 In step S4, the trigger condition for adjusting the action of the hydraulic cylinder 7 is that the pitch cylinder 3 retracts to the preset length at the same time as the pin cylinder 10 retracts to the preset length.

[0055] Obviously, based on the above, this is to prevent damage to components caused by the adjustment cylinder 7 operating when the pitch cylinder 3 and the pin cylinder 10 are not in position.

[0056] As another embodiment of this utility model, this embodiment proposes a telescopic boom vehicle, which includes any of the above-mentioned telescopic boom mechanisms.

[0057] Obviously, based on the above, this vehicle can further reduce the height of the telescopic boom when folded, making it more convenient for large engineering vehicles to use and transport in special situations.

[0058] To more clearly illustrate the implementation plan and its effects, we will use the attached diagram as an example:

[0059] See attached document Figures 1-8 When the telescopic arm changes from the extended state to the folded state, such as Figure 1 As shown, first the boom 4 retracts, and the pitch cylinder 3 retracts to the position shown. Figure 2 As shown, the locking cylinder 10 then drives the locking pin 14 to separate from the rocker arm fulcrum 12 and the fulcrum fixing hole 9. Then, the adjusting cylinder 7 retracts, causing the rocker arm 6 to rotate counterclockwise along the first rotating shaft connecting hole. The main arm 4 and the rocker arm 6 fold into the storage slot 2, as shown. Figure 3 As shown;

[0060] When the telescopic arm changes from a folded state to a state requiring fulcrum fixation, the adjusting cylinder 7 extends, causing the rocker arm 6 to rotate clockwise along the first pivot connection hole, as shown below. Figure 4 As shown, the limiting component 15 restricts the rotation of the rocker arm 6, ensuring that the rocker arm fulcrum 12 and the fulcrum fixing hole 9 are fully aligned. Figure 5 As shown, the hydraulic cylinder 10 then drives the locking pin 14 to insert into the rocker arm fulcrum 12 and the fulcrum fixing hole 9, thus completing the fulcrum fixing of the telescopic arm. Figure 6 , Figure 7 As shown.

Claims

1. A telescopic arm mechanism characterised in that: The utility model provides a kind of crane, including support seat (1), rocker arm (6) with rocker arm fulcrum (12) being opened in bottom end and large arm (4) being rotatably connected with upper end of rocker arm (6), the inside of support seat (1) is opened with receiving groove (2), the upper side of rocker arm (6) close to rocker arm fulcrum (12) is equipped with first pivot connecting hole, and rocker arm (6) is rotatably connected with the inside side wall of support seat (1) by first pivot connecting hole, support rod (11) is installed in the inside of rocker arm (6) close to the upper side of first pivot connecting hole, the side of support rod (11) away from large arm (4) is connected with support seat (1) by adjusting oil cylinder (7), the both ends of adjusting oil cylinder (7) are rotatably connected with support rod (11) and support seat (1) respectively, the side of large arm (4) away from adjusting oil cylinder (7) is connected with support seat (1) by pitching oil cylinder (3), the both ends of pitching oil cylinder (3) are rotatably connected with large arm (4) and support seat (1) respectively, when pitching oil cylinder (3) is retracted to preset length state, rocker arm (6) can be rotated along first pivot connecting hole, side wall of support seat (1) is opened with fulcrum fixed hole (9), the inside of support seat (1) is equipped with limiting assembly (15) for limiting the rotation of rocker arm (6) so that rocker arm fulcrum (12) and fulcrum fixed hole (9) are aligned at the position close to fulcrum fixed hole (9), the bottom end of support seat (1) is equipped with fulcrum fixing assembly for fixing rocker arm fulcrum (12) and fulcrum fixed hole (9) at the position close to rocker arm fulcrum (12), and the fulcrum fixing assembly is separately connected between rocker arm fulcrum (12) and fulcrum fixed hole (9).

2. A telescopic arm mechanism according to claim 1, characterised in that: The fulcrum fixing assembly includes latch oil cylinder (10) with telescopic end at both ends, the both ends of latch oil cylinder (10) are arranged opposite to fulcrum fixed hole (9), the fixed end of latch oil cylinder (10) is fixed with support seat (1) by latch oil cylinder fixed plate (13), and the telescopic end of both ends of latch oil cylinder (10) is equipped with locking pin (14) with hole diameter being adapted to rocker arm fulcrum (12) and fulcrum fixed hole (9).

3. A telescopic arm mechanism according to claim 1, characterised in that: When pitching oil cylinder (3) is retracted to preset length, rocker arm (6) can be rotated along first pivot connecting hole, and the first pivot connecting hole, the rotatable connection point of rocker arm (6) and large arm (4) and the connection point of both ends of pitching oil cylinder (3) and large arm (4) and support seat (1) form parallelogram.

4. A reach arm mechanism according to claim 3, wherein: When rocker arm (6) can be rotated along first pivot connecting hole, pitching oil cylinder (3) is in reset initial state, and the telescopic end of pitching oil cylinder (3) is not extended.

5. A telescopic arm mechanism according to claim 1, characterised in that: The limiting assembly (15) comprises a bottom mounting block (17) and a limiting block (19), the bottom mounting block (17) is connected with the inner wall of the support seat (1), the limiting block (19) is arranged on the side of the bottom mounting block (17) close to the rocker arm (6), and the side of the limiting block (19) close to the rocker arm (6) is matched with the opposite side of the rocker arm (6) in the state of aligning the rocker arm fulcrum (12) and the fulcrum fixing hole (9).

6. A telescopic arm mechanism according to claim 5, characterised in that: The bottom mounting block (17) is connected with the limiting block (19) through a plurality of groups of adjusting bolts (18), the side of the limiting block (19) close to the inner wall of the support seat (1) is provided with an inner mounting block (16), the inner mounting block (16) is connected with the inner wall of the support seat (1), and the limiting block (19) is abuttingly fixed with the inner mounting block (16) through a fixing bolt (20).

7. A telescopic arm mechanism according to claim 1, characterised in that: The rocker arm (6) is provided with a rotary connecting piece (5) at the connecting position of the first rotary shaft connecting hole and the support seat (1) and the connecting position of the rocker arm (6) and the large arm (4).

8. A reach truck vehicle, characterized by: A telescopic arm mechanism as claimed in any one of claims 1 to 7.

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