CN113043047A - Automatic clamping mechanism of excavator movable arm - Google Patents
Automatic clamping mechanism of excavator movable arm Download PDFInfo
- Publication number
- CN113043047A CN113043047A CN202110530419.8A CN202110530419A CN113043047A CN 113043047 A CN113043047 A CN 113043047A CN 202110530419 A CN202110530419 A CN 202110530419A CN 113043047 A CN113043047 A CN 113043047A
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- CN
- China
- Prior art keywords
- movable arm
- lead screw
- excavator
- taper pin
- clamping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/08—Work-clamping means other than mechanically-actuated
- B23Q3/082—Work-clamping means other than mechanically-actuated hydraulically actuated
Abstract
The invention discloses an automatic clamping mechanism of a movable arm of an excavator, which comprises two conical pin mounting seats which are opposite, wherein the two conical pin mounting seats are respectively provided with a conical pin, are respectively connected with a bottom plate through a guide rail sliding block and are respectively connected with a double-rotation-direction trapezoidal lead screw arranged on the bottom plate; one end of the trapezoidal lead screw is provided with a hydraulic motor, and the other end is provided with an encoder. The guide rail sliding block and the trapezoidal lead screw are provided with an organ cover for preventing welding slag. The hydraulic motor is connected with the hydraulic pump station and is provided with a hydraulic self-lock. A pair of angular contact bearings is arranged between the taper pin and the taper pin mounting seat. One side of the mechanism is provided with a limit switch, and the lower side of the bottom plate is provided with an adjusting block. The hydraulic pump is used as power, the hydraulic motor is used as drive, the positive and negative trapezoidal lead screws are used as power transmission mechanisms, the positioning and centering clamping of two ends of a movable arm workpiece are realized, the automatic feeding and discharging and automatic clamping of the workpiece are realized, friction loss in workpiece asynchronous lifting is optimized through the cooperation of the taper pin and the bearing, and the efficiency, the service life and the automation rate of equipment of the movable arm centering clamping tool are greatly improved.
Description
Technical Field
The invention relates to an excavator machining tool, in particular to an automatic clamping mechanism of an excavator movable arm.
Background
The excavator is an important type of engineering machinery, plays a role in lifting the weight of infrastructure construction in China, has increasingly wide application, and even gradually replaces engineering machinery such as a bulldozer and the like.
The movable arm of the excavator is a main stressed part of the excavator during excavation operation, and has the characteristics of large volume, thick material and heavy mass. The movable arm welding is mainly operated by means of a positioner, and the positioner needs a special clamp to clamp and position a workpiece. The current common clamp 1) an oil cylinder clamps two ends or a middle section of a movable arm; 2) two clamping plate seats are screwed on a double-rotation-direction screw, the opening and closing clamping function of the clamping plate seats is realized through parts such as a handle, a guide rail and the like, and the tightness is manually controlled so as to change the clamping position of the movable arm. Although the mechanism can realize the fixation of the movable arm, the compatibility is poor, the model change is troublesome, the manual participation wastes time and labor, and the clamping position is not reliable by the observation of human eyes.
Along with the requirement of a user on the product welding quality and the welding efficiency is higher and higher, the requirement on production flexibility is continuously improved due to the compatibility of the user on welding equipment products, and the traditional movable arm clamping tool cannot meet the requirement. The novel movable arm welding clamping tool becomes a common tool, not only has the traditional movable arm clamping and positioning function, but also has the functions of being compatible with various models of products, automatic control, position detection and the like.
The first prior art is as follows:
as shown in fig. 1, the changzhou information and professional technical institute develops a clamping mechanism of a movable arm of an excavator, and realizes manual clamping of the movable arm. The mechanism comprises a base, a double-rotation-direction screw rod and two opposite clamping plate seats, wherein end cover plates are arranged at two ends of the base, two ends of the double-rotation-direction screw rod are rotatably supported on the two end cover plates respectively, a handle fixed with the double-rotation-direction screw rod is arranged on the outer side surface of one end cover plate, two opposite thread sections are arranged at two ends of the double-rotation-direction screw rod respectively, the middle parts of the bottoms of the two clamping plate seats are in threaded connection with the two thread sections of the double-rotation-direction screw rod respectively, two ends of the bottoms of the two clamping plate seats are supported on the base in a slidable mode respectively, a locking part penetrating through the clamping plate seats can be fixed between the two clamping plate seats and the base, and clamping pins are arranged on opposite surfaces of the two clamping plate seats respectively. Simple structure, the very convenient elasticity is so that change the clamping position of swing arm, easy operation has saved the time, has improved work efficiency.
The first prior art has the following defects:
the movable arm clamping tool is manually operated, has low automation degree, and wastes time and labor; the locking pin positioning of the clamping position is easy to deform.
The second prior art is:
as shown in figure 2, the Qizihaer two machine tool (group) Limited liability company invents a trapezoidal screw centering hydraulic clamping device, and mainly relates to the field of machine tool manufacturing, namely, workpiece clamping devices of a numerical control gantry boring and milling machine and a numerical control gantry combined milling machine. The trapezoidal screw centering hydraulic clamping device comprises a speed reducer, wherein the speed reducer drives two left-handed and right-handed trapezoidal screws to rotate, two ends of the left-handed and right-handed trapezoidal screws are fixedly connected with a left bracket and a right bracket respectively, the left bracket and the right bracket are located above the left-handed and right-handed trapezoidal screws respectively, a clamping block is arranged on the left bracket, and the clamping block is connected with a clamping oil cylinder. The time of the clamping process is shortened, the clamping efficiency of the machine tool workpiece is improved, and the machine tool workpiece clamping device is suitable for the rapid beat of an automatic high-efficiency production line of a machine tool.
The second prior art has the following defects:
the device adopts the motor speed reducer as power, installs the hydro-cylinder on trapezoidal lead screw bracket and presss from both sides tight work piece, and is with high costs, and the operation is complicated. The device is mainly used for machine tool manufacturing, and the application range is limited.
Disclosure of Invention
The invention aims to provide an automatic clamping mechanism of a movable arm of an excavator.
The purpose of the invention is realized by the following technical scheme:
the automatic clamping mechanism of the excavator movable arm comprises two conical pin mounting seats which are opposite to each other, wherein the two conical pin mounting seats are respectively provided with a conical pin, are respectively connected with a bottom plate through a guide rail sliding block and are respectively connected with a double-rotation-direction trapezoidal lead screw arranged on the bottom plate;
one end of the trapezoidal lead screw is provided with a hydraulic motor, and the other end of the trapezoidal lead screw is provided with an encoder.
According to the technical scheme provided by the invention, the automatic clamping mechanism of the movable arm of the excavator provided by the embodiment of the invention utilizes the hydraulic pump as power, the hydraulic motor as drive, the positive and negative trapezoidal lead screws as power transmission mechanisms, and the two ends of the movable arm workpiece are positioned and centered and clamped by matching with accessories such as the copying taper pin, the encoder, the protective cover and the like. The device can realize automatic clamping position adjustment according to the size of a workpiece by matching with a control system and a positioner, realize automatic feeding and discharging of the workpiece and automatic clamping by matching with an RGV, the positioner and the control system, optimize friction loss in asynchronous lifting of the workpiece by matching with a taper pin and a bearing, and greatly improve the efficiency, the service life and the automation rate of equipment of a movable arm centering and clamping tool.
Drawings
FIG. 1 is a schematic structural diagram of a clamping mechanism of a boom of an excavator according to a first prior art;
FIG. 2 is a schematic structural view of a trapezoidal screw centering hydraulic clamping device in the second prior art;
fig. 3 is a schematic structural diagram of an automatic clamping mechanism of a boom of an excavator according to an embodiment of the present invention.
The reference numerals in fig. 1 and 2 are their designations in the original application document and have no meaning in the present application;
in fig. 3:
1) the device comprises a hydraulic motor, 2) a taper pin, 3) a welding slag prevention organ cover, 4) a bearing seat (built-in bearing), 5) a trapezoidal lead screw, 6) an encoder, 7) a limit switch, 8) an adjusting block and 9) a guide rail sliding block.
Detailed Description
The embodiments of the present invention will be described in further detail below. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art.
The invention relates to an automatic clamping mechanism of a movable arm of an excavator, which comprises the following preferred specific embodiments:
the taper pin installation bases are respectively provided with taper pins, are respectively connected with the bottom plate through guide rail sliding blocks and are respectively connected with a double-rotation-direction trapezoidal lead screw arranged on the bottom plate;
one end of the trapezoidal lead screw is provided with a hydraulic motor, and the other end of the trapezoidal lead screw is provided with an encoder.
And the guide rail sliding block and the trapezoidal lead screw are provided with an organ cover for preventing welding slag.
The hydraulic motor is connected with the hydraulic pump station and is provided with a hydraulic self-lock.
And a pair of angular contact bearings is arranged between the taper pin and the taper pin mounting seat.
One side of the mechanism is provided with a limit switch.
And the lower side of the bottom plate is provided with an adjusting block.
The automatic clamping mechanism of the movable arm of the excavator utilizes a hydraulic pump as power, a hydraulic motor as drive, a positive and negative trapezoidal lead screw as a power transmission mechanism, and realizes the positioning and centering clamping of two ends of a movable arm workpiece by matching with accessories such as a profiling taper pin, an encoder, a protective cover and the like. The device can realize automatic clamping position adjustment according to the size of a workpiece by matching with a control system and a positioner, realize automatic feeding and discharging of the workpiece and automatic clamping by matching with an RGV, the positioner and the control system, optimize friction loss in asynchronous lifting of the workpiece by matching with a taper pin and a bearing, and greatly improve the efficiency, the service life and the automation rate of equipment of a movable arm centering and clamping tool.
The specific embodiment is as follows:
as shown in fig. 3, includes: the device comprises a hydraulic motor 1, a taper pin 2, a welding slag prevention organ cover 3, a bearing seat (built-in bearing) 4, a trapezoidal lead screw 5, an encoder 6, a limit switch 7, an adjusting block 8 and a guide rail slide block 9.
The mechanism is integrally arranged on the bottom plate; the two opposite taper pin mounting seats are connected with the bottom plate through the guide rail sliding blocks and are fixedly connected with the double-rotation-direction trapezoidal lead screw arranged on the bottom plate; one end of the two ends of the trapezoidal screw rod is provided with a hydraulic motor, and the other end is provided with an encoder; the guide rail sliding block and the trapezoidal lead screw are protected by an organ cover to prevent welding slag and dust; and a bearing is arranged between the taper pin and the taper pin mounting seat, so that the taper pin can rotate.
1) Adopt hydraulic motor drive trapezoidal lead screw to press from both sides tight work piece, hydraulic motor and hydraulic power unit are adopted to power, compare the motor:
a hydraulic pump station is adopted for driving, and the impact of a power grid is small when the system is started;
the volume power of the hydraulic motor is much smaller than that of the motor, and the power occupies a large space if the motor and the speed reducer are matched, so that the feeding and discharging of a workpiece are influenced, and the accessibility of welding seams at two ends of the workpiece is reduced in robot welding;
stepless speed regulation under constant torque is easy to realize, and the speed is required to be adjustable in order to ensure the precision of the feeding and discharging position of a workpiece and the safety of the workpiece;
hydraulic self-locking is carried out, a brake device can be omitted under certain conditions, after a workpiece is centered and clamped, the workpiece is generally matched with a positioner to complete actions such as overturning, synchronous or asynchronous lifting and the like, and the self-locking is very important at the moment;
the working vibration is small, the system is impact load resistant, the stability of the whole structure is improved, and the working stability of the positioner or the robot is matched;
sixthly, the working reliability is high;
and the trapezoidal screw rod has a self-locking function, various safe displacements after a workpiece is clamped are ensured, the two taper pin mounting seats are respectively mounted on the front side and the back side of the trapezoidal screw rod, the sliding block and the guide rail are used as guides, and the hydraulic motor is used as power to realize the relative movement of the taper pin mounting seats.
2) A pair of angular contact bearings is arranged between the taper pins and the taper pin mounting seats, and after a workpiece is clamped by the two taper pins, hard friction cannot be generated in the asynchronous lifting process, so that the service life of the tool is greatly prolonged. A limit switch 7 is arranged on one side of the device and used as stroke protection. And a regulating block 8 is arranged on the lower side of the tool bottom plate to finely regulate the overall installation size of the tool.
3) An encoder 6 is arranged at one end of the trapezoidal lead screw, and the position of the taper pin mounting seat and the clamping position of the clamp are judged through feedback of the encoder.
The invention has the beneficial effects that:
(1) as the process of the excavator product is adjusted and updated, the movable arm can continuously change the size, and the conventional movable arm welding and clamping tool is single in size and poor in compatibility with the type and the size of the workpiece. A novel movable arm hydraulic centering clamping tool reasonably solves the problems.
(2) At present, manual clamping is adopted for workpiece feeding and discharging of a movable arm welding workstation, the automation degree is low, the efficiency is low, a lot of time is wasted in the clamping process, the whole welding efficiency is influenced, the movable arm hydraulic centering clamping tool can be matched with other equipment to complete automatic feeding and discharging, and the clamping can also be completed quickly through manual buttons.
(3) The tool is compact in overall structure, safe, reliable, good in compatibility and suitable for centering, clamping and positioning of all movable arms.
The technical key points of the invention are as follows:
(1) by hydraulic motor, positive and negative trapezoidal lead screw, encoder, profile modeling taper pin, guide rail slider etc. constitute, have following advantage: the workpiece size compatibility is many, degree of automation is high, clamping is reliable and stable, equipment utilization is high.
(2) The clamp is suitable for clamping all movable arm models, and is not suitable for clamping a movable arm of a certain model. The distance of the profiling taper pin is adjusted by switching clamping programs of different models, so that clamping of workpieces of different models can be switched rapidly.
(6) And the modular design is adopted, and the customized combination can be carried out according to the requirements.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. The automatic clamping mechanism of the movable arm of the excavator is characterized by comprising two taper pin mounting seats which are opposite, wherein the two taper pin mounting seats are respectively provided with a taper pin, are respectively connected with a bottom plate through a guide rail sliding block and are respectively connected with a double-rotation-direction trapezoidal lead screw arranged on the bottom plate;
one end of the trapezoidal lead screw is provided with a hydraulic motor, and the other end of the trapezoidal lead screw is provided with an encoder.
2. The automatic clamping mechanism of the excavator boom as claimed in claim 1, wherein the guide rail slider and the trapezoidal lead screw are provided with an organ cover for preventing welding slag.
3. The automatic clamping mechanism of the movable arm of the excavator as claimed in claim 2, wherein the hydraulic motor is connected with a hydraulic pump station and is provided with a hydraulic self-locking mechanism.
4. The automatic clamping mechanism for the boom of the excavator as claimed in claim 3, wherein a pair of angular contact bearings are installed between the taper pin and the taper pin mounting seat.
5. The automatic clamp mechanism for the boom of the excavator according to claim 4, wherein a limit switch is installed at one side of the mechanism.
6. The automatic clamp mechanism of an excavator boom according to any one of claims 1 to 5, wherein an adjustment block is installed at a lower side of the base plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110530419.8A CN113043047A (en) | 2021-05-14 | 2021-05-14 | Automatic clamping mechanism of excavator movable arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110530419.8A CN113043047A (en) | 2021-05-14 | 2021-05-14 | Automatic clamping mechanism of excavator movable arm |
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| Publication Number | Publication Date |
|---|---|
| CN113043047A true CN113043047A (en) | 2021-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110530419.8A Pending CN113043047A (en) | 2021-05-14 | 2021-05-14 | Automatic clamping mechanism of excavator movable arm |
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| Country | Link |
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| CN (1) | CN113043047A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113458697A (en) * | 2021-08-19 | 2021-10-01 | 南京合信自动化有限公司 | Centering clamping structure of suspension arm welding clamp |
-
2021
- 2021-05-14 CN CN202110530419.8A patent/CN113043047A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113458697A (en) * | 2021-08-19 | 2021-10-01 | 南京合信自动化有限公司 | Centering clamping structure of suspension arm welding clamp |
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