CN216190433U - Grabbing force calibrating device of hydraulic grab bucket - Google Patents

Abstract

The utility model relates to a grabbing force calibrating device of a hydraulic grab, which comprises a calibrating box connected with two groups of symmetrically arranged hydraulic grabs, wherein strip-shaped through grooves are symmetrically arranged on two sides of the calibrating box, and a square through groove is also arranged on the upper part of the calibrating box; the calibration box is characterized by further comprising a bidirectional driving assembly arranged in the calibration box, the bidirectional driving assembly is connected with the movable module to drive the movable module to ascend or descend in the square through groove, a lifting assembly connected with the triangular adjusting plate is further arranged in the calibration box, and the lifting assembly drives the triangular adjusting plate to descend or ascend when the bidirectional driving assembly drives the movable module to ascend or descend, so that the practicability is high.

Description

A gripping force calibration device for a hydraulic grab

technical field

The utility model relates to the field of calibration, in particular to a gripping force calibration device of a hydraulic grab.

Background technique

Hydraulic grab bucket is a working device that provides power to the hydraulic cylinder through the hydraulic power source, thereby driving the opening and closing of the left and right combined buckets or multiple jaw plates to grab and discharge bulk materials. It is composed of multiple jaw plates. Grabs are also called claws.

Hydraulic grab is a hydraulic structural product, which is composed of hydraulic cylinder, bucket, connecting column, bucket ear plate, bucket ear sleeve, bucket tooth, tooth seat and other spare parts, so welding is the most critical production process of hydraulic grab. The quality directly affects the structural strength and service life of the hydraulic grab. In addition, the hydraulic cylinder is also the most critical driving component. The hydraulic grab is a special equipment accessory for the industry. Special equipment is required to perform the operation with high efficiency and high quality, such as: CNC plasma cutting machine, bevel milling machine, plate rolling machine, welding machine Positioner, boring machine, hydraulic test bench, etc.

During the long-term use of the hydraulic grab, due to the leakage of hydraulic oil in the hydraulic system or the wear between the parts, the tightening force of the hydraulic grab will be lower than the calibration value at the factory. The force may cause the hydraulic grab to be unreliable when grabbing the object, causing the object to be detached from the hydraulic grab, affecting the safety of use. Therefore, a gripping force calibration device of the hydraulic grab is proposed to solve the above problem.

Utility model content

The purpose of the present utility model is to provide a gripping force calibration device of a hydraulic grab to solve the problems raised in the above-mentioned background art.

To achieve the above object, the utility model provides the following technical solutions:

A gripping force calibration device of a hydraulic grab bucket, the gripping force calibration device of the hydraulic grab bucket comprises a calibration box connecting two sets of symmetrically arranged hydraulic grabbers, and long strip-shaped through grooves are symmetrically arranged on both sides of the calibration box, And the upper part of the calibration box is also provided with a square through slot, wherein, a triangular adjustment plate hinged with the hydraulic grip is movably arranged on the elongated through slot, and a movable module is movably arranged on the square through slot. , the movable module is connected to the hydraulic grip through a hydraulic cylinder;

The gripping force calibration device of the hydraulic grab also includes a bidirectional drive assembly arranged in the calibration box, the bidirectional drive assembly is connected to the movable module to drive the movable module in the square through slot Ascending or descending, the calibration box is also provided with a pulling assembly connected with the triangular adjustment plate, and the pulling assembly drives the triangular adjustment when the two-way drive assembly drives the movable module to ascend or descend. The board goes down or up.

As a further solution of the present invention: the triangular adjustment plate is movably installed on the elongated through-groove through guide assemblies symmetrically arranged on both sides of the triangular adjustment plate, and the guide assembly includes a symmetrically mounted triangular adjustment plate and located on the triangular adjustment plate. Mounting plates on the inner and outer sides of the elongated through groove, and a plurality of pulleys rotatably mounted on the mounting plate;

Wherein, the pulleys mounted on the two mounting plates on the same side of the triangular adjustment plate are arranged opposite to each other.

As a further solution of the present invention: the two-way drive assembly and the pulling assembly are connected by a transmission chain;

Specifically, the transmission chain is a chain.

As a further solution of the present invention, the two-way drive assembly includes two baffles fixed symmetrically and fixedly installed in the calibration box, a driving device fixedly installed on one of the baffles, and a driving device fixedly installed on the baffle. a reducer on the plate and fixedly connected with the output shaft of the drive device, and a lifting structure connected with the rotating shaft of the reducer;

The lifting structure is connected to the lifting assembly through the transmission chain.

As a further solution of the present invention, the lifting structure includes a worm screw that is rotatably installed between the baffles, a worm wheel that meshes with the worm screw and is rotatably installed in the calibration box, and that is coaxially fixed with the worm wheel. connected turntable;

Wherein, the worm is connected to the reducer and connected to the pulling assembly through the transmission chain, and the turntable is connected to the movable module through a connecting rod.

As a further solution of the present utility model: the pulling assembly comprises a bidirectional screw rod rotatably installed in the calibration box, a threaded sleeve symmetrically arranged on the bidirectional screw rod and threadedly matched with it, connecting the two-way screw rod a threaded sleeve and the pull rod of the triangular adjustment plate;

The bidirectional screw rod is connected with the worm through the transmission chain, one end of the pull rod is hinged with the threaded sleeve, and the other end is hinged with the triangular adjustment plate.

Compared with the prior art, the beneficial effects of the present utility model are:

The position of the movable module and the triangular adjustment plate is adjusted by setting the two-way drive assembly and the lifting assembly, so as to realize the adjustment of the grasping force of the hydraulic grab, which makes up for the inability to adjust the grasping force of the existing hydraulic grab during use. In addition, in the process of adjusting the grip, manual intervention is not required, which reduces the danger caused by manual operation during the adjustment process.

Description of drawings

FIG. 1 is a schematic structural diagram of an embodiment of a gripping force calibration device for a hydraulic grab.

FIG. 2 is an enlarged view of A in FIG. 1 .

FIG. 3 is an enlarged view of B in FIG. 2 .

4 is a schematic diagram of the spatial relationship between a calibration box and a triangular adjustment plate in an embodiment of a gripping force calibration device of a hydraulic grab.

In the picture: 1-Hydraulic grip, 2-Calibration box, 3-Slot channel, 4-Square channel, 5-Triangular adjustment plate, 6-Installation plate, 7-Pulley, 8-Baffle plate, 9-Drive Device, 10-reducer, 11-worm, 12-worm gear, 13-turntable, 14-connecting rod, 15-movable module, 16-transmission chain, 17-two-way screw, 18-threaded sleeve, 19-tie rod .

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or an intervening element may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

Referring to FIGS. 1 to 4 , in an embodiment of the present utility model, a gripping force calibration device of a hydraulic grab bucket includes a calibration box 2 connecting two sets of symmetrically arranged hydraulic grabbers 1 , The two sides of the calibration box 2 are symmetrically provided with elongated through-slots 3, and the upper part of the calibration box 2 is also provided with a square through-slot 4, wherein the elongated through-slot 3 is movably provided with a The triangular adjustment plate 5 of the hydraulic grip 1 is hinged, the square through groove 4 is movably provided with a movable module 15, and the movable module 15 is connected to the hydraulic grip 1 through a hydraulic cylinder;

The gripping force calibration device of the hydraulic grab also includes a bidirectional drive assembly disposed in the calibration box 2, and the bidirectional drive assembly is connected to the movable module 15 to drive the movable module 15 in the square shape. The through slot 4 rises or falls, and the calibration box 2 is also provided with a pulling assembly connected with the triangular adjustment plate 5, and the pulling assembly drives the movable module 15 to rise or fall in the two-way drive assembly. When descending, the triangular adjusting plate 5 is driven to descend or ascend.

In the embodiment of the present utility model, during use, the hydraulic grip 1 is driven to fold by a hydraulic cylinder, and the pressure sensor (not shown in the figure) is clamped to detect the tightening force of the hydraulic grip under the folded condition. When the tightening force of the hydraulic grip is different from the calibration value, the movable module 15 is driven to rise or fall by controlling the two-way drive assembly, and the lifting assembly is driven to move during the working process of the two-way drive assembly, so as to pull the triangular adjustment plate 5 first or rise to realize the calibration of the tightening force of the hydraulic grab, wherein the above-mentioned calibration value is the rated value of the hydraulic grab when it leaves the factory;

The inside of the calibration box 2 is a cavity, and the upper part is provided with the above-mentioned square through grooves 4 for the movable module 15 to lift and lower, and two sides are symmetrically provided with long strip-shaped through grooves 3 for the lifting and lowering of the triangular adjustment plate 5, and the triangular adjustment plate 5 is connected to the movable module 15. When the modules 15 move relatively or toward each other, the tightening force of the hydraulic grip 1 is increased or decreased, so that the tightening force of the hydraulic grip can be adjusted to the calibration value

The above-mentioned pressure sensor is an application of the prior art, and the pressure sensor is mainly used to detect the pressure between objects under force.

As an embodiment of the present invention, the triangular adjustment plate 5 is movably installed on the elongated through groove 3 through guide assemblies symmetrically arranged on both sides of the triangular adjustment plate 5, and the guide assembly includes a symmetrical installation of the triangular adjustment plate 5. The mounting plate 6 on the plate 5 and located on the inner and outer sides of the elongated through groove 3, and a plurality of pulleys 7 rotatably mounted on the mounting plate 6;

Wherein, the pulleys 7 mounted on the two mounting plates 6 on the same side of the triangular adjustment plate 5 are arranged opposite to each other.

In the embodiment of the present invention, two mounting plates 6 are fixedly installed on the front side and the rear side of the triangle adjustment plate 5, and a plurality of pulleys 7 are rotatably installed on the two mounting plates 6 on the same side, so as to adjust the triangle The plate 5 guides when ascending or descending, so as to avoid friction between the triangular adjustment plate 5 and the inside of the calibration box 2, causing unnecessary wear, and improving the stability of the hydraulic grab.

As an embodiment of the present invention, the bidirectional driving assembly and the pulling assembly are connected by a transmission chain 16;

Specifically, the transmission chain 16 is a chain.

In the embodiment of the present invention, considering that in actual use, the hydraulic gripping force is very large, in order to prevent slippage due to insufficient friction during the calibration process, the above-mentioned chain is provided to improve the stability during calibration.

As an embodiment of the present invention, the bidirectional drive assembly includes two baffles 8 symmetrically and fixedly installed in the calibration box 2, a driving device 9 fixedly installed on one of the baffles 8, a fixed The reducer 10 installed on the baffle plate 8 and fixedly connected with the output shaft of the drive device 9, and the lifting structure connected with the rotating shaft of the reducer 10;

The lifting structure is connected to the lifting assembly through the transmission chain 16 .

In the embodiment of the present utility model, during use, by controlling the rotation of the driving device 9, the reducer 10 is driven to move, and the reducer 10 drives the movable module 15 to rise or fall through the lifting structure;

It should be noted that the reducer 10 is an application of the prior art, and the accelerator 10 is an independent component composed of a gear drive, a worm drive, and a gear-worm drive enclosed in a rigid housing, and is often used as a prime mover The deceleration transmission device between the working machine and the working machine plays the role of matching the speed and transmitting torque between the prime mover and the working machine or the actuator. It is generally used for low-speed and high-torque transmission equipment. The power is achieved by the gears with a small number of teeth on the input shaft of the reducer meshing with the large gears on the output shaft to achieve the purpose of deceleration. Ordinary reducers will also have several pairs of gears with the same principle to achieve the ideal deceleration effect. The load at the moment of starting the drive device 9 during the calibration process is small;

Wherein, the above-mentioned driving device 9 is a servo motor whose output shaft can be forward and reversed.

As an embodiment of the present invention, the lifting structure includes a worm 11 rotatably installed between the baffles 8 , a worm wheel 12 engaged with the worm 11 and rotatably installed in the calibration box 2 , and The worm gear 12 is coaxially and fixedly connected to the turntable 13;

Wherein, the worm 11 is connected to the reducer 10 and is connected to the pulling assembly through the transmission chain 16 , and the turntable 13 is connected to the movable module 15 through the connecting rod 14 .

In the embodiment of the present invention, when the driving device 9 rotates, the reducer 10 drives the worm 11 to rotate, and the worm 11 meshes with the worm wheel 12 to drive the turntable 13 coaxially arranged with the worm wheel 12 to rotate, and the connecting rod 14 drives the rotary table 13 to rotate. The moving module 15 rises or falls;

It is worth noting that in the whole calibration process, the rotation angle of the turntable 13 should not be greater than 180°, and in the initial state, the hinge point between the connecting rod 14 and the turntable 13 is located at the highest point in the vertical direction of the disc 13 along its center. point or the lowest point to achieve the best adjustment ability;

The above-mentioned worm 11 and the worm wheel 12 have a self-locking effect, that is, the worm 11 can drive the worm wheel 12 to rotate, but the worm wheel 12 cannot drive the worm 11 to rotate, which improves the stability of the hydraulic grip 1 after calibration.

As an embodiment of the present invention, the lifting assembly includes a bidirectional screw rod 17 rotatably installed in the calibration box 2, and a threaded sleeve symmetrically arranged on the bidirectional screw rod 17 and threadedly matched with it 18. Connect the threaded sleeve 18 and the pull rod 19 of the triangular adjustment plate 5;

The two-way screw 17 is connected with the worm 11 through the transmission chain 16 , one end of the pull rod 19 is hinged with the threaded sleeve 18 , and the other end is hinged with the triangular adjustment plate 5 .

In the embodiment of the present invention, when the worm 11 rotates, the two-way screw 17 is driven to rotate through the transmission chain 16, so that the two threaded sleeves 18 provided on the two-way screw 17 are in the axial direction of the two-way screw 17. Relative movement or opposite movement in the direction, and the triangular adjustment plate 5 is driven to rise or fall by the pull rod 19 .

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments are to be considered in all respects as exemplary and not restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is therefore intended that the All changes within the meaning and range of the required equivalents are embraced within the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (6)

1. A gripping force calibration device for a hydraulic grab, characterized in that the gripping force calibration device for the hydraulic grab comprises a calibration box (2) connecting two sets of symmetrically arranged hydraulic grabs (1), the calibration box The two sides of (2) are symmetrically provided with elongated through-slots (3), and the upper part of the calibration box (2) is further provided with a square through-slot (4), wherein the elongated through-slots (3) A triangular adjustment plate (5) hinged with the hydraulic grip (1) is movably arranged on the upper side, and a movable module (15) is movably arranged on the square through groove (4), and the movable module (15) is hydraulically arranged. A cylinder is connected to the hydraulic grip (1); The gripping force calibration device of the hydraulic grab also includes a bidirectional drive assembly arranged in the calibration box (2), and the bidirectional drive assembly is connected to the movable module (15) to drive the movable module ( 15) ascending or descending in the square through groove (4), the calibration box (2) is also provided with a pulling assembly connected with the triangular adjustment plate (5), and the pulling assembly is located in the When the two-way drive assembly drives the movable module (15) to ascend or descend, it drives the triangular adjustment plate (5) to descend or ascend. 2 . The gripping force calibration device of a hydraulic grab bucket according to claim 1 , wherein the triangular adjustment plate ( 5 ) is movably installed on the elongated strip through guide assemblies symmetrically arranged on both sides thereof. 3 . On the through slot (3), the guide assembly includes a mounting plate (6) symmetrically mounted on the triangular adjustment plate (5) and located on the inner and outer sides of the elongated through slot (3). a plurality of pulleys (7) on the mounting plate (6); Wherein, the pulleys (7) mounted on the two mounting plates (6) on the same side of the triangular adjustment plate (5) are arranged oppositely. 3 . The gripping force calibration device of a hydraulic grab bucket according to claim 1 , wherein the bidirectional driving assembly and the pulling assembly are connected by a transmission chain ( 16 ); 3 . Specifically, the transmission chain (16) is a chain. 4. The gripping force calibration device of a hydraulic grab bucket according to claim 3, wherein the bidirectional drive assembly comprises two baffle plates (8) symmetrically and fixedly installed in the calibration box (2). , a drive device (9) fixedly installed on one of the baffle plates (8), a reducer (10) fixedly installed on the baffle plate (8) and fixedly connected to the output shaft of the drive device (9) ), a lifting structure connected with the rotating shaft of the reducer (10); The lifting structure is connected to the lifting assembly through the transmission chain (16). 5 . The gripping force calibration device of a hydraulic grab bucket according to claim 4 , wherein the lifting structure comprises a worm ( 11 ) rotatably installed between the baffles ( 8 ), and the The worm (11) engages and rotates a worm wheel (12) installed in the calibration box (2), and a turntable (13) coaxially and fixedly connected with the worm wheel (12); Wherein, the worm (11) is connected to the reducer (10) and is connected to the lifting assembly through the transmission chain (16), and the turntable (13) is connected to the movable module through a connecting rod (14). (15). 6 . The gripping force calibration device of a hydraulic grab bucket according to claim 5 , wherein the lifting assembly comprises a bidirectional screw ( 17 ) rotatably installed in the calibration box ( 2 ), a symmetrical a threaded sleeve (18) arranged on and threadedly matched with the bidirectional screw rod (17), and a pull rod (19) connecting the threaded sleeve (18) and the triangular adjustment plate (5); The two-way screw (17) is connected with the worm (11) through the transmission chain (16), one end of the pull rod (19) is hinged with the threaded sleeve (18), and the other end is connected with the triangle The adjustment plate (5) is hinged.

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