Centering and clamping mechanism for movable arm of excavator

Abstract

The utility model relates to the technical field of excavator movable arm production, in particular to a centering clamping mechanism of an excavator movable arm, which is characterized in that a first centering hydraulic oil cylinder and a second centering hydraulic oil cylinder are controlled to move, and when a first centering pressing piece is in contact with an excavator movable arm body and a second centering pressing piece is in contact with the excavator movable arm body, the first centering hydraulic oil cylinder and the second centering hydraulic oil cylinder are clamped; the first laser displacement monitoring device is controlled to monitor the Y-direction distance between the first laser displacement monitoring device and the excavator boom body as a first distance, the second laser displacement monitoring device is controlled to monitor the Y-direction distance between the second laser displacement monitoring device and the excavator boom body as a second distance, and the difference value d between the first distance and the second distance is compared; the first centering hydraulic oil cylinder and the second centering hydraulic oil cylinder are controlled to move in the same direction by the distance of d / 2 at the same time, centering positioning is completed, the centering clamping structure can conduct centering adjustment on the middle of the excavator movable arm, and deviation errors of the middle of the excavator movable arm are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of excavator boom production, in particular to a centering clamping mechanism of an excavator boom. Background Art

[0002] In the prior art, when processing the boom of an excavator, the boom needs to be hoisted on a processing tool, and then the head, middle and tail of the excavator boom need to be positioned.

[0003] A Chinese patent with authorization announcement number CN209078275U discloses a boom machining tooling, which has the same clamping method for the head and tail of the excavator boom. Specifically, after the pin shaft is passed through the connecting hole of the boom, the two connecting parts of the boom are aligned with the height adjustment seat and lowered through the lifting mechanism. The pin shaft first contacts the equal height block and supports the boom; the drive screw is rotated, and under the action of the threaded body with opposite rotation directions, the claws move away from each other until they touch the connecting part, and the centering adjustment is performed. The positioning device is symmetrically arranged to ensure that the boom is accurately positioned in the horizontal direction; the height adjustment seat is rotated to support the connecting part. Since the diameter of the support pin shaft is smaller than the aperture of the connecting hole, the height adjustment seat supports the two ends of the boom at the same height, and then the support pin shaft is removed, and the positioning of the two ends of the boom is completed; at the same time, the clamping device is started to clamp the boom from all sides, and the positioning of the boom is completed.

[0004] In the above clamping method, only the two ends of the excavator boom are adjusted and positioned, and then the boom is directly clamped by the clamping devices on all sides. This method lacks the centering adjustment process for the middle part of the excavator boom. In actual production, the method of centering and positioning only the two ends of the excavator boom is prone to large errors. This is because the excavator boom is long, and when only the two ends are centered and positioned, lateral offset errors are prone to occur in the middle. During the production and assembly process of the excavator boom, the offset error of the middle part of the excavator boom has a greater impact on the overall production quality of the excavator boom.

[0005] Therefore, there is an urgent need to improve the centering clamping mechanism of the excavator boom, so as to avoid offset errors in the middle of the excavator boom by centering the middle of the excavator boom. Utility Model Content

[0006] The technical problem to be solved by the utility model is that it is urgent to improve the centering clamping mechanism of the excavator boom, and to avoid the offset error of the middle part of the excavator boom by centering the middle part of the excavator boom.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A centering clamping mechanism for an excavator boom, comprising a centering clamping mechanism body, wherein the centering clamping mechanism body comprises a first laser displacement monitoring device, a second laser displacement monitoring device, a first centering hydraulic cylinder, a first centering clamping member, a second centering hydraulic cylinder and a second centering clamping member;

[0009] The centering clamping mechanism is connected to the middle part of the frame, and the first laser displacement monitoring device and the second laser displacement monitoring device are respectively relatively and symmetrically arranged on the Y-direction side and the reverse side of the Y-direction of the frame; the first centering hydraulic cylinder and the second centering hydraulic cylinder are respectively relatively and symmetrically arranged on the Y-direction side and the reverse side of the Y-direction of the frame, the first centering clamping piece is connected to the first centering hydraulic cylinder, and the second centering clamping piece is connected to the second centering hydraulic cylinder; the first centering clamping piece is connected to a proximity switch facing the reverse side of the Y-direction, and the second centering clamping piece is connected to a proximity switch facing the Y-direction side.

[0010] Furthermore, in the centering clamping mechanism of the above-mentioned excavator boom, one or more auxiliary clamping mechanisms are respectively provided on the X-direction side and the opposite side of the X-direction of the centering clamping mechanism body, and the auxiliary clamping mechanism includes auxiliary positioning cylinders that are symmetrically and relatively arranged on the Y-direction side and the opposite side of the Y-direction of the frame, and the piston rod connecting rod of the auxiliary positioning cylinder is connected to an auxiliary clamping member, and the auxiliary clamping member is connected to a proximity switch.

[0011] Furthermore, in the centering clamping mechanism of the above-mentioned excavator boom, both the first centering clamping member and the second centering clamping member are provided with clamping surfaces which are arranged opposite to each other and parallel to the vertical direction, and the height of the clamping surfaces is 40-60 cm.

[0012] Furthermore, in the centering clamping mechanism of the above excavator boom, the auxiliary clamping piece is provided with a clamping surface parallel to the vertical direction, and the height of the clamping surface is 30-50 cm.

[0013] Furthermore, in the centering clamping mechanism of the above-mentioned excavator boom, the auxiliary clamping mechanism also includes a first fixed limit plate and a second fixed limit plate which are symmetrically arranged on the Y-direction side and the Y-direction reverse side of the frame respectively, and the distance between the first fixed limit plate and the second fixed limit plate is greater than the middle width of the excavator boom by 5-10 cm.

[0014] Furthermore, in the centering clamping mechanism of the excavator boom, the upper end of the first fixed limit plate on the opposite side of the Y direction is provided with a chamfer, and the upper end of the second fixed limit plate on the Y direction is provided with a chamfer.

[0015] Furthermore, in the centering clamping mechanism of the excavator boom, the centering clamping mechanism body further comprises a first storage box for storing the first laser displacement monitoring device, a first torsion spring pressure cover is provided on the top of the first storage box, a first lifting column is provided in the first storage box, and the first laser displacement monitoring device is connected to the first lifting column;

[0016] The centering clamping mechanism body also includes a second storage box for accommodating a second laser displacement monitoring device. A second torsion spring pressure cover is provided on the top of the second storage box. A second lifting column is provided in the second storage box. The second laser displacement monitoring device is connected to the second lifting column.

[0017] The beneficial effects of the utility model are as follows: the two ends of the excavator boom body are first hoisted downward to the frame by a crane, and after the two ends of the excavator boom are preliminarily positioned, the first pair of centering hydraulic cylinders and the second pair of centering hydraulic cylinders are controlled to move; when the first pair of centering clamping pieces contacts the excavator boom body, the corresponding proximity switch obtains a signal to control the first pair of centering hydraulic cylinders to stop moving; when the second pair of centering clamping pieces contacts the excavator boom body, the corresponding proximity switch obtains a signal to control the second pair of centering hydraulic cylinders to stop moving; the first laser displacement monitoring device is controlled to monitor its contact with the excavator boom The Y-direction spacing between the two bodies is the first spacing, and the second laser displacement monitoring device is controlled to monitor the Y-direction spacing between it and the excavator boom body as the second spacing. The difference d between the first spacing and the second spacing is compared, and it is calculated that the displacement distances that need to be adjusted for the first centering hydraulic cylinder and the second centering hydraulic cylinder are d / 2 respectively; the first centering hydraulic cylinder and the second centering hydraulic cylinder are controlled to move a distance of d / 2 in the same direction at the same time to complete the centering positioning. The above centering clamping structure can perform centering adjustment on the middle part of the excavator boom to avoid offset errors in the middle part of the excavator boom. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a centering clamping mechanism of an excavator boom according to a specific implementation mode of the utility model;

[0019] Figure 2 for Figure 1 A magnified view of part A;

[0020] Figure 3 for Figure 1 A magnified view of part B;

[0021] Description of labels:

[0022] 1. Centering clamping mechanism body; 11. First laser displacement monitoring device; 111. First storage box; 112. First torsion spring pressure cover; 113. First lifting column; 12. Second laser displacement monitoring device; 121. Second storage box; 122. Second torsion spring pressure cover; 123. Second lifting column; 13. First centering hydraulic cylinder; 14. First centering clamping member; 15. Second centering hydraulic cylinder; 16. Second centering clamping member;

[0023] 2. Auxiliary clamping mechanism; 21. Auxiliary positioning cylinder; 22. Auxiliary clamping member; 23. First fixed limit plate; 24. Second fixed limit plate. DETAILED DESCRIPTION

[0024] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0025] Please refer to Figures 1 to 3 The specific embodiment of the utility model relates to a centering clamping mechanism of an excavator boom, comprising a centering clamping mechanism body 1, wherein the centering clamping mechanism body 1 comprises a first laser displacement monitoring device 11, a second laser displacement monitoring device 12, a first centering hydraulic cylinder 13, a first centering clamping member 14, a second centering hydraulic cylinder 15, and a second centering clamping member 16;

[0026] The centering clamping mechanism is connected to the middle part of the frame, and the first laser displacement monitoring device 11 and the second laser displacement monitoring device 12 are respectively relatively and symmetrically arranged on the Y-direction side and the reverse side of the Y-direction of the frame; the first centering hydraulic cylinder 13 and the second centering hydraulic cylinder 15 are respectively relatively and symmetrically arranged on the Y-direction side and the reverse side of the Y-direction of the frame, the first centering clamping member 14 is connected to the first centering hydraulic cylinder 13, and the second centering clamping member 16 is connected to the second centering hydraulic cylinder 15; the first centering clamping member 14 is connected to a proximity switch facing the reverse side of the Y-direction, and the second centering clamping member 16 is connected to a proximity switch facing the Y-direction side.

[0027] In the above implementation manner, the first pair of centering hydraulic cylinders 13 and the second pair of centering hydraulic cylinders 15 are both connected with displacement sensors, which are connected to the servo hydraulic station. When the cylinders are actuated, the system issues instructions, and the servo hydraulic station converts the received instructions into the required amount of pumped oil, and the piston displacement accuracy can reach 0.1mm.

[0028] First, lift the two ends of the excavator boom body downward to the frame by a crane. After the two ends of the excavator boom are initially positioned, the first pair of centering hydraulic cylinders 13 and the second pair of centering hydraulic cylinders 15 are controlled to move. When the first pair of centering clamps 14 contact the excavator boom body, the corresponding proximity switch obtains a signal to control the first pair of centering hydraulic cylinders 13 to stop moving. When the second pair of centering clamps 16 contact the excavator boom body, the corresponding proximity switch obtains a signal to control the second pair of centering hydraulic cylinders 15 to stop moving. Control the first laser displacement monitoring device 11 to monitor the distance between it and the excavator boom body. The Y-spacing is the first spacing, and the second laser displacement monitoring device 12 is controlled to monitor the Y-spacing between it and the excavator boom body as the second spacing. The difference d between the first spacing and the second spacing is compared, and it is calculated that the displacement distances that need to be adjusted for the first centering hydraulic cylinder 13 and the second centering hydraulic cylinder 15 are d / 2 respectively; the first centering hydraulic cylinder 13 and the second centering hydraulic cylinder 15 are controlled to move a distance of d / 2 in the same direction at the same time to complete the centering positioning. The above centering clamping structure can perform centering adjustment on the middle part of the excavator boom to avoid offset errors in the middle part of the excavator boom.

[0029] As a preferred embodiment, one or more auxiliary clamping mechanisms 2 are respectively provided on the X-direction side and the reverse side of the X-direction of the centering clamping mechanism body 1, and the auxiliary clamping mechanism 2 includes auxiliary positioning cylinders 21 symmetrically and relatively arranged on the Y-direction side and the reverse side of the Y-direction of the frame, and the piston rod connecting rod of the auxiliary positioning cylinder 21 is connected to an auxiliary clamping member 22, and the auxiliary clamping member 22 is connected to a proximity switch.

[0030] In the above embodiment, when the centering clamping mechanism body 1 completes the centering, the auxiliary positioning cylinder 21 of each auxiliary clamping mechanism 2 is controlled to move, and when each auxiliary clamping member 22 contacts the excavator boom body, the corresponding proximity switch obtains a signal to control each auxiliary positioning cylinder 21 to stop moving.

[0031] In the above implementation manner, the above control process can be automatically realized by setting up a PLC, and electrically connecting the PLC to the first centering hydraulic cylinder 13, the second centering hydraulic cylinder 15, each auxiliary positioning cylinder 21, each proximity switch, the first laser displacement monitoring device 11 and the second laser displacement monitoring device 12 respectively.

[0032] As a preferred embodiment, the first pair of centering pressing members 14 and the second pair of centering pressing members 16 are both provided with pressing surfaces which are oppositely arranged and parallel to the vertical direction, and the height of the pressing surfaces is 40-60 cm.

[0033] In the above embodiments, when the first centering clamping member 14 and the second centering clamping member 16 respectively position the side of the excavator boom through the clamping surface, the side of the excavator boom can be positioned more stably because the height of the clamping surface is high enough.

[0034] As a preferred embodiment, the auxiliary clamping member 22 is provided with a pressing surface parallel to the vertical direction, and the height of the pressing surface is 30-50 cm.

[0035] In the above embodiments, when each auxiliary clamping member 22 positions the side of the excavator boom through the pressing surface, the side of the excavator boom can be positioned more stably because the height of the pressing surface is high enough.

[0036] As a preferred embodiment, the auxiliary clamping mechanism 2 also includes a first fixed limit plate 23 and a second fixed limit plate 24 symmetrically arranged on the Y-direction side and the Y-direction reverse side of the frame, and the distance between the first fixed limit plate 23 and the second fixed limit plate 24 is greater than the middle width of the excavator boom by 5-10 cm.

[0037] In the above embodiments, when the excavator boom is hoisted to the frame for preliminary positioning, the first fixed limit plate 23 and the second fixed limit plate 24 can play a role in preliminary positioning to prevent the excavator boom from tipping over during preliminary positioning.

[0038] As a preferred embodiment, the upper end of the first fixed limiting plate 23 on the opposite side of the Y direction is chamfered, and the upper end of the second fixed limiting plate 24 on the Y direction is chamfered.

[0039] As a preferred embodiment, the centering clamping mechanism body 1 further includes a first storage box 111 for storing the first laser displacement monitoring device 11, a first torsion spring pressure cover 112 is provided on the top of the first storage box 111, a first lifting column 113 is provided in the first storage box 111, and the first laser displacement monitoring device 11 is connected to the first lifting column 113;

[0040] The centering clamping mechanism body 1 also includes a second storage box 121 for accommodating a second laser displacement monitoring device 12 . A second torsion spring cover 122 is provided on the top of the second storage box 121 . A second lifting column 123 is provided in the second storage box 121 . The second laser displacement monitoring device 12 is connected to the second lifting column 123 .

[0041] When centering adjustment is required, the first laser displacement monitoring device 11 is driven to move upward by controlling the first lifting column 113, and the first torsion spring cover 112 is lifted up, so that the first laser displacement monitoring device 11 is exposed above the first storage box 111. When it is not in use, the first laser displacement monitoring device 11 is driven to move downward by controlling the first lifting column 113 and stored in the first storage box 111, and the first torsion spring cover 112 is automatically closed under the action of the torsion spring to prevent dust. The second laser displacement monitoring device 12 is similar and will not be described in detail.

[0042] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. The centering clamping mechanism of the excavator boom is characterized by: It includes a centering clamping mechanism body, which includes a first laser displacement monitoring device, a second laser displacement monitoring device, a first centering hydraulic cylinder, a first centering clamping member, a second centering hydraulic cylinder and a second centering clamping member; The centering clamping mechanism is connected to the middle part of the frame, and the first laser displacement monitoring device and the second laser displacement monitoring device are respectively relatively and symmetrically arranged on the Y-direction side and the reverse side of the Y-direction of the frame; the first centering hydraulic cylinder and the second centering hydraulic cylinder are respectively relatively and symmetrically arranged on the Y-direction side and the reverse side of the Y-direction of the frame, the first centering clamping piece is connected to the first centering hydraulic cylinder, and the second centering clamping piece is connected to the second centering hydraulic cylinder; the first centering clamping piece is connected to a proximity switch facing the reverse side of the Y-direction, and the second centering clamping piece is connected to a proximity switch facing the Y-direction side.

2. The centering clamping mechanism of the excavator boom according to claim 1, characterized in that: One or more auxiliary clamping mechanisms are respectively provided on the X-direction side and the reverse side of the X-direction of the centering clamping mechanism body, and the auxiliary clamping mechanism includes auxiliary positioning cylinders which are symmetrically and relatively arranged on the Y-direction side and the reverse side of the Y-direction of the frame, and the piston rod of the auxiliary positioning cylinder is connected to an auxiliary clamping member, and the auxiliary clamping member is connected to a proximity switch.

3. The centering clamping mechanism of the excavator boom according to claim 1, characterized in that: The first pair of centering pressing members and the second pair of centering pressing members are both provided with pressing surfaces which are arranged opposite to each other and parallel to the vertical direction, and the height of the pressing surfaces is 40-60 cm.

4. The centering clamping mechanism for the excavator boom according to claim 2, characterized in that: The auxiliary clamping piece is provided with a pressing surface parallel to the vertical direction, and the height of the pressing surface is 30-50 cm.

5. The centering clamping mechanism for the excavator boom according to claim 2, characterized in that: The auxiliary clamping mechanism also includes a first fixed limit plate and a second fixed limit plate which are symmetrically arranged on the Y-direction side and the Y-direction reverse side of the frame respectively. The distance between the first fixed limit plate and the second fixed limit plate is greater than the middle width of the excavator boom by 5-10 cm.

6. The centering clamping mechanism for the excavator boom according to claim 5, characterized in that: The upper end of the first fixed limiting plate on the opposite side in the Y direction is provided with a chamfer, and the upper end of the second fixed limiting plate on the side in the Y direction is provided with a chamfer.

7. The centering clamping mechanism for the excavator boom according to claim 1, characterized in that: The centering clamping mechanism body further includes a first storage box for storing the first laser displacement monitoring device, a first torsion spring pressure cover is provided on the top of the first storage box, a first lifting column is provided in the first storage box, and the first laser displacement monitoring device is connected to the first lifting column; The centering clamping mechanism body also includes a second storage box for accommodating a second laser displacement monitoring device. A second torsion spring pressure cover is provided on the top of the second storage box. A second lifting column is provided in the second storage box. The second laser displacement monitoring device is connected to the second lifting column.

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