CN110185283A - A kind of pincers using movable cutting edge, which are cut, embraces a multifunctional rescue accessory - Google Patents

Abstract

The utility model relates to a multifunctional rescue attachment with a movable cutting edge, which relates to the field of hydraulically controlled earthquake resistance and disaster reduction. The device is composed of a grasping part, a pincer cutting part, and a pincer cutting function switching part. The grasping part mainly completes the work of fixing and grasping the concrete. It can not only complete the work of grasping, but also fix the objects to be broken and cooperate with the pincers to complete the work of crushing and cutting. The pliers and shears can independently complete the work of pliers, crushing and cutting after quickly switching to the designated function. When the large arm of the engineering machinery remains still, the invention can complete the local fine and rapid cutting of the concrete column. The present invention adopts the design of the pincer blade and the full shear blade, optimizes the size of the swing cylinder mechanism, and satisfies the required cutting force of the pincers on the full shear blade. In the face of complex working conditions, the present invention can assist the pincers to quickly complete the post-disaster concrete cleaning work, reduce the number of types of attachments required in the rescue process, and save precious time for post-disaster rescue.

Description

A multi-functional rescue tool with movable blades and scissors

technical field

The invention relates to the technical fields of mechanical design and hydraulic control for earthquake resistance and disaster reduction, and specifically belongs to a multifunctional rescue attachment with movable cutting edges.

Background technique

Earthquake disasters will cause direct and indirect damage and loss to national economic construction and people's life and property safety. Investing in more efficient post-earthquake disaster relief equipment is of great significance for saving tens of millions of lives. Most modern buildings are frame structures, that is, the main body of the building is mainly composed of reinforced concrete columns. After natural disasters such as earthquakes, the buildings will not completely collapse, but are supported by reinforced concrete columns with higher strength. Various reinforced concrete columns They are built together, and the post-disaster ruins of buildings such as some concrete slabs are covered on the reinforced concrete columns, so that the demolition of the reinforced concrete columns has become a great obstacle to post-disaster rescue.

The existing demolition and rescue method is to use a special concrete saw to cut the reinforced concrete column into multiple sections after the support is built, and then carry it away in batches. The whole rescue process is not only time-consuming and laborious, but also the vibration generated by the saw can easily cause secondary collapse and secondary injury.

In view of the above problems, the present invention designs a multi-functional rescue attachment capable of refined operation, high efficiency and preventing secondary damage to the ruins during the rescue process. This attachment not only has the functions of independent clamping, cutting, and holding, but also has the function of combining two groups of clamping, cutting, and holding. It is very suitable for the needs of rescue and rescue of building ruins after urban disasters. This multi-functional rescue attachment is easy to operate. , The structure is simple and reliable, the function is powerful, and the weight is not much different from ordinary single-function attachments.

Contents of the invention

The purpose of the present invention is to provide a multi-functional rescue attachment with independent crushing, cutting, and grasping working capabilities, as well as different combined working capabilities.

In the present invention, the multi-functional rescue attachment with movable cutting edges can be divided into the grasping part (A), the pincers part (B) and the pincers switching part (C), specifically as follows:

The grasping component (A) includes: a grasping hydraulic cylinder (2), a grasping claw (4), a force transmission part (3) and a base (1). One end of the grasping hydraulic cylinder (2) is hinged to the base (1) through a rotating shaft, and the other end is hinged to the power transmission part (3). The three connecting holes of the power transmission part (3) are respectively connected to the base (1), the Catch the hydraulic cylinder (2) and the claw (4) are hinged. The force transmission part (3), the base (1) and the grasping hydraulic cylinder (2) constitute a grasping swing cylinder mechanism, and when the grasping hydraulic cylinder (2) is extended, the force transmission part (3) and the grasping claw are pushed (4) Simultaneously rotate around the hinged position with the base (1), so as to push the claw (4) to complete the grasping of the reinforced concrete column. There are five claws (4) in total, three on one side and two on the other side.

The nipper part (B) includes: a nipper hydraulic cylinder (5) and a nipper arm (6). The present invention has two parts of scissors parts, one end of each part of the scissors hydraulic cylinder (5) is hinged with the base (1) through the rotating shaft, the other end is hinged with the scissors arm (6), and the middle part of the scissors arm (6) It is hinged with the base (1), and one end is hinged with the scissors hydraulic cylinder (5) to form a scissors swing cylinder mechanism to realize the scissors movement. The scissor arms (6) on both sides are arranged axisymmetrically, so that the two scissor hydraulic cylinders (5) can be placed side by side inside the base (1) to increase the force arm of the scissors without increasing more The overall length of the attachment is reduced under the condition of a certain thickness.

The nipper-scissor switching part (C) includes: conversion hydraulic cylinder (7), support trapezoidal block (8), movable knife seat (9), steel bar blade (10), movable tong blade (14), transmission connecting rod (11) , inclined-plane chute (12), pincer blade chute (13); the inner cavity of the pincers scissors arm (6) is empty, and the inner cavity includes a beveled-plane bottom and four walls, and the beveled-plane chute (12) is fixed on the pincers and scissors arm ( 6) At the bottom of the side of the inner cavity, the supporting trapezoidal block (8) is installed on the inclined chute (12), and can slide along the direction of the inclined chute (12), but will not be separated from the inclined chute (12); the conversion hydraulic cylinder ( 7) Hinged on the two walls of the inner cavity of the scissor arm (6), the direction of rotation is consistent with that of the scissor arm (6), and the hydraulic cylinder rod of the conversion hydraulic cylinder (7) is hinged to the support trapezoidal block (8); When the switching hydraulic cylinder is extended, the supporting trapezoidal block (8) is pushed to slide on the inclined-plane chute (12); The groove slides, but is inseparable. Two transmission links (11) are hinged on the movable knife seat to promote the movement of the movable tong blade (14); The pincer blade chute (13) is installed together and can slide along the direction of the pincer blade chute (13), but will not be separated from the pincer blade chute (13); (9) is hinged with the middle part of the movable tong blade (14); when the switching hydraulic cylinder is extended, the trapezoidal support block (8) is pushed to slide, thereby pushing the movable knife seat (9) to protrude from the inner cavity of the tongs and scissors arm (6), At the same time, the movable knife seat (9) pushes the movable tong blade (14) installed on the tong blade chute (13) to slide to both sides by pushing the transmission connecting rod (11), leaving room for the movable knife seat (9). stick out the space. Steel bar blade (10) is fixed on the movable knife seat by screw.

The movable knife seat (9) is in the shape of 'L' as a whole, and the movable knife seat (9) installed in the two nippers and shears switching parts axisymmetrically ensures that they are staggered and stacked together to ensure that all steel bars, steel pipes, etc. are completely cut off. The two ends of the movable knife seat are placed in the chute on the arm of the inner chamber of the scissors arm, and all the radial force received by the movable knife seat is unloaded on the scissors arm. The shear force received by the movable knife seat is directly transmitted to the floor of the scissor arm through the trapezoidal support block, and the mechanical self-locking of the slope of the trapezoidal support block (that is, the friction coefficient is greater than the tangent value of the inclination angle) prevents the shear force from being transmitted to the switching hydraulic cylinder superior.

There are four transmission connecting rods (11) in total, and each part of the nipper cutting switching part includes two, which are installed on both sides of the movable knife seat, and the movable tongs blade (14) and the movable knife seat (9) are connected together to ensure The linkage between the movable knife seat and the movable tong blade is realized. The length of the transmission link is such that when the movable knife seat is completely located in the inner cavity of the scissor arm (6), the two movable tong blades are completely closed together to ensure that the inner cavity is in a completely closed state; when the movable knife seat is fully extended , the two movable blades are completely attached to the movable knife seat to ensure that the cavity of the scissors arm is completely closed, preventing concrete blocks from entering the cavity of the scissors arm, causing the mechanism to be stuck and the parts to be worn.

The pincers scissor arm (6) is an incomplete symmetrical part. The body of the scissor arm is symmetrical, and includes a hinged hole hinged with the base (1), providing a plane for the installation position of the movable tongs blade (14), and an inner cavity for placing the scissors switching part. The hinged hole connecting the scissors arm with the scissors hydraulic cylinder (5) is not less than the distance of the maximum radius of the scissors hydraulic cylinder, and is located on one side of the symmetry axis of the main body, thereby ensuring that the two scissors hydraulic cylinders are placed side by side, increasing the The force arm of the scissors work, the scissors arm is hollow design, which not only reduces the overall mass of the scissors arm, but also provides enough space for the scissors switching parts, which solves the problem of the installation of the existing multifunctional attachment function switching hydraulic cylinder The problem of not enough space.

The present invention optimizes the function of the pliers and scissors on the basis of the existing multifunctional rescue attachment with scissors and grasps, improves the pliers blade to be movable, and realizes that when the whole attachment does not move, the pliers blade and the shearing blade The same working position ensures that the tong blade can fully crush the concrete, so that the steel bar is completely exposed to the shear blade, eliminating the adverse effect of concrete on the shear blade to cut the steel bar, thus ensuring the rapid cutting of the reinforced concrete column.

The present invention proposes an installation method for placing the power hydraulic cylinders of the tongs and shears side by side. By designing the tongs and scissors with a relatively long One side of the symmetry axis of the main body of the scissors, so that the hydraulic cylinders of the scissors are placed staggered, and the power arm of the scissors is greatly increased under the premise of ensuring that the force surface of the hydraulic cylinder is parallel to the movement plane of the scissors arm, and the static Force breaking provides protection.

The invention optimizes the design of the swing cylinder mechanism of the scissors, sets the distance between the hinged position of the hydraulic cylinder of the scissors and the base, and the hinged position of the scissors arm and the base as the length of the scissors frame, and determines the The ratio of the distance between the two hinged holes of the arm to the length of the scissors frame is 0.6153, and the ratio of the initial length of the scissors hydraulic cylinder to the length of the scissors frame is 0.6831, which ensures the maximum average output force during the entire process of scissors .

The invention optimizes the design of the swing cylinder mechanism of the grab, and sets the distance between the hinged position of the grab hydraulic cylinder and the base and the hinged position of the grab claw and the base as the length of the grab frame. The ratio of the distance between the two hinged holes of the claw to the length of the grasping frame is 0.3638, and the ratio of the length of the grasping hydraulic cylinder to the length of the grasping frame in the retracted state is 0.8124, which ensures that when the hydraulic cylinder is fully retracted , the entire gripping part can be retracted in reverse, which eliminates the influence on the function of the individual tongs and shears, and also ensures that the force transmission effect of the swing cylinder mechanism is the best when the gripping attachment allows the largest mass of concrete columns to be gripped.

The base designed in the present invention not only increases the length of the multi-functional rescue attachment that can grasp the reinforced concrete column, but also reduces the correlation between the grasping parts and the clamping parts; the middle of the base is hollowed out to form a truss structure , in the case of satisfying the structural strength of the base, it not only reduces the overall weight of the attachment, but also provides enough installation space for the hydraulic control components of the attachment.

Description of drawings

Below in conjunction with accompanying drawing, the present invention is further described:

Figure 1 3D front view of the overall assembly

Figure 2 Three-dimensional side view of the overall assembly

Figure 3 Front view of the grasping parts

Figure 4 Front view of the clamp parts

Figure 5 Front view of the nipper switching part

Figure 6 The front view of the fully folded working state of the grasping parts

Figure 7 The front view of the fully extended working state of the grasping part

Figure 8 Left view of the scissor arm

Figure 9 Cutaway view of the scissor arm

In the figure: A. Holding parts, B. Clamping parts, C. Clamping switching parts, 1. Base, 2. Clamping hydraulic cylinder, 3. Power transmission parts, 4. Claws, 5. Clamping hydraulic pressure Cylinder, 6. Pliers and scissors arm, 7. Conversion hydraulic cylinder, 8. Supporting trapezoidal block, 9. Movable knife seat, 10. Reinforced blade, 11. Transmission connecting rod, 12. Inclined chute, 13. Tong blade chute, 14. Movable blade

Detailed ways

Below in conjunction with accompanying drawing illustrate following specific implementation manner:

In the present invention, the multi-functional rescue attachment with movable cutting edges can be divided into the grasping part (A), the pincers part (B) and the pincers switching part (C), specifically as follows:

The grasping component (A) includes: a grasping hydraulic cylinder (2), a grasping claw (4), a force transmission part (3) and a base (1). One end of the grasping hydraulic cylinder (2) is hinged to the base (1) through a rotating shaft, and the other end is hinged to the power transmission part (3). The three connecting holes of the power transmission part (3) are respectively connected to the base (1), the Catch the hydraulic cylinder (2) and the claw (4) are hinged. The force transmission part (3), the base (1) and the grasping hydraulic cylinder (2) constitute a grasping swing cylinder mechanism, and when the grasping hydraulic cylinder (2) is extended, the force transmission part (3) and the grasping claw are pushed (4) Simultaneously rotate around the hinged position with the base (1), so as to push the claw (4) to complete the grasping of the reinforced concrete column. One side of the holding claw (4) is distributed with three pieces, and the other side is two pieces placed crosswise, so as to meet the requirement of being able to hold concrete blocks of any size.

The nipper part (B) includes: a nipper hydraulic cylinder (5) and a nipper arm (6). The present invention has two parts of scissors parts, one end of each part of the scissors hydraulic cylinder (5) is hinged with the base (1) through the rotating shaft, the other end is hinged with the scissors arm (6), and the middle part of the scissors arm (6) It is hinged with the base (1), and one end is hinged with the scissors hydraulic cylinder (5) to form a scissors swing cylinder mechanism to realize the scissors movement. The scissor arms (6) on both sides are arranged axisymmetrically, so that the two scissor hydraulic cylinders (5) can be placed side by side inside the base (1) to increase the force arm of the scissors without increasing more The overall length of the attachment is reduced under the condition of a certain thickness.

The nipper-scissor switching part (C) includes: conversion hydraulic cylinder (7), support trapezoidal block (8), movable knife seat (9), steel bar blade (10), movable tong blade (14), transmission connecting rod (11) , inclined plane chute (12), pincer blade chute (13). The nipper switching part of the present invention has two parts, and each part is respectively installed in the nipper arm (6) of the nipper part. The inner cavity of the scissors arm (6) is empty, and the inner cavity includes a slope bottom and four walls, the slope chute (12) is fixed on the bottom of the side of the cavity of the clamp arm (6), and the support trapezoidal block (8) is installed on the slope On the chute (12), it can slide along the chute direction, but can not be separated from the inclined plane chute (12). The conversion hydraulic cylinder (7) is inserted on the two walls of the inner chamber of the scissor arm (6) through the rotating shafts on both sides of the cylinder body, and has the same rotation direction as the scissor arm (6), and the conversion hydraulic cylinder (7) The hydraulic cylinder rod is hinged with the support trapezoidal block (8). When the switching hydraulic cylinder is extended, the support trapezoidal block (8) can be promoted to slide on the inclined-plane chute (12). Movable knife seat is installed together by the chute at the top of the bottom of the knife seat and the support trapezoidal block (8), and can slide relatively along the chute, but inseparable, and the steel bar blade (10) is fixed on the movable knife seat by screws. Two transmission connecting rods (11) are hinged on the movable knife seat for promoting the movement of the pliers blade. The pincers blade chute (13) is fixed on the pincers scissors arm (6), and the pincers blade is installed on the chute, can slide along the chute direction, but can not separate with the chute. The two ends of the transmission connecting rod (11) are respectively hinged with the middle part of the movable knife seat (9) and the movable tong blade (14), so as to ensure the linkage relationship between the two. When the switching hydraulic cylinder is extended, the trapezoidal support block is pushed to slide, thereby pushing the movable knife seat (9) to protrude from the inner cavity of the scissor arm (6), and at the same time, the movable knife seat (9) is pushed through the transmission connecting rod (11 ) thereby promoting the movable tongs blade (14) installed on the tongs blade chute (13) to slide to both sides, leaving space for the movable knife seat (9).

As shown in Figure 7, the holding claw has five pieces, and the installation position has a certain misalignment, that is, the left and right staggered installation in the axial direction of the hinge shaft satisfies the requirement that the holding claws are staggered together to form a smaller closed space for holding Grab small objects.

When a single grabbing function is required, rotate the entire attachment to move the pincers (B) away from the object to be acted on, and only drive the grabbing hydraulic cylinder (2).

As shown in Figure 6, when a single hydraulic tong function is required, rotate the entire attachment to move the grasping part (A) away from the object to be acted on and fully retract the grasping hydraulic cylinder (2), and drive the switching hydraulic cylinder to retract and keep it still , only drive the pincers to cut the hydraulic cylinder (5).

When a single hydraulic shear function is required, rotate the entire attachment to move the grasping part (A) away from the object to be acted on and fully retract the grasping hydraulic cylinder (2), drive the switching hydraulic cylinder to extend and keep it still, and only drive the pincers The hydraulic cylinder (5) is enough, and now the pincer blades on both sides are assisted to fix the action object to a certain extent.

As shown in Figure 2, when it is necessary to finely cut the reinforced concrete column with the pincers, the grasping part (A) will completely fix the reinforced concrete column, and the construction machine will keep the base (1) still, and operate the pincers hydraulic cylinder (5) After the concrete is completely crushed, operate the switching hydraulic cylinder to extend the movable knife seat (9), operate the clamping hydraulic cylinder again to cut off the steel bar, and finally move the cut reinforced concrete column away from the site by moving the base .

As shown in Fig. 8 and Fig. 9, the pincers scissors arm (6) is an incomplete symmetrical part. The body of the scissor arm is symmetrical, and includes a hinged hole hinged with the base (1), providing a plane for the installation position of the movable tongs blade (14), and an inner cavity for placing the scissors switching part. The offset of the hinged hole connecting the scissors arm with the scissors hydraulic cylinder (5) is not less than the distance of the maximum radius of the scissors hydraulic cylinder, and is located on one side of the symmetry axis of the main body, thereby ensuring that the two scissors hydraulic cylinders are placed side by side, The force arm of the scissors work is increased, and the scissors arm is hollow, which not only reduces the overall mass of the scissors arm, but also provides enough space for the switching parts of the scissors, which solves the problem of the existing multi-function attachment function switching hydraulic pressure. There is not enough space for the cylinder to be installed.

Claims (6)

1. a kind of pincers using movable cutting edge, which are cut, embraces multifunctional rescue accessory, it is divided into embracing and grabs component (A), clamps and cut component (B) and pincers Cut switching part (C), it is characterised in that specific as follows:

It is embraced with two parts and grabs component, it includes: to embrace to grab hydraulic cylinder (2), holding claw (4), power driving member that each section, which embraces and grabs component (A), (3) and pedestal (1)；It embraces and grabs hydraulic cylinder (2) one end by rotary shaft and pedestal (1) hingedly, the other end and power driving member (3) are cut with scissors Connect, three connecting holes of power driving member (3) respectively with pedestal (1), embrace and grab hydraulic cylinder (2) and holding claw (4) hingedly；Power driving member (3), pedestal (1) and embrace grab hydraulic cylinder (2) constitute a Ge Baozhua tilt cylinder mechanism, when embrace grab hydraulic cylinder (2) elongation when, motive force pass Moving part (3) and holding claw (4) are rotated around with pedestal (1) articulated position simultaneously, push holding claw (4) to complete to reinforced concrete to realize Embracing for earth pillar is grabbed；Holding claw (4) is five total, and three pieces are distributed in side, the other side is two panels；

Component is cut with two parts pincers, and it includes: that pincers cut hydraulic cylinder (5) and pincers cut arm (6) that each section pincers, which cut component (B),；Every portion The pincers divided cut hydraulic cylinder (5) one end and pass through rotary shaft and pedestal (1) hingedly, and the other end and pincers cut arm (6) hingedly, and pincers cut arm (6) Hingedly, one end and pincers cut the hinged Qian Jian tilt cylinder mechanism that constitutes of hydraulic cylinder (5) and realize that pincers cut movement for intermediate position and pedestal (1)；Two The pincers of side cut arm (6) and axial symmetry placement are presented, and can be placed side by side in pedestal (1) to meet two pincers and cut hydraulic cylinder (5) Portion；

Pincers cut switching part with two parts, and every part, which is separately mounted to pincers, cuts the pincers of component and cut in arm (6)；Each section pincers are cut Switching part (C) includes: conversion hydraulic cylinder (7), support trapezoid block (8), movable tool apron (9), steel blade (10), operative clamp edge (14), kinematic link (11), inclined-plane sliding slot (12), pincers sword sliding slot (13)；Pincers cut arm (6) inner cavity as sky, and inner cavity includes one Inclined-plane bottom and four walls, inclined-plane sliding slot (12) are fixed on pincers and cut arm (6) inner cavity side bottom, and support trapezoid block (8) is mounted on inclined-plane On sliding slot (12), it can be slided along inclined-plane sliding slot (12) direction, but not separated with inclined-plane sliding slot (12)；Convert hydraulic cylinder (7) hinge It connects on two walls that pincers cut the inner cavity of arm (6), rotatable direction and pincers cut arm (6) unanimously, convert the hydraulic cylinder of hydraulic cylinder (7) Bar and support trapezoid block (8) are hinged；Push support trapezoid block (8) sliding on inclined-plane sliding slot (12) when switching hydraulic cylinder elongation It is dynamic；Movable tool apron is installed together by the sliding slot of tool apron bottom and the top of support trapezoid block (8), can be slided along the chute, but Inseparable, hinged on movable tool apron there are two kinematic link (11), for pushing the movement of operative clamp edge (14)；Operative clamp edge (14) it is installed together with being fixed on pincers and cut the pincers sword sliding slot (13) on arm (6), can be slided along pincers sword sliding slot (13) direction, but not It can be separated with pincers sword sliding slot (13)；Kinematic link (11) both ends are hinged with movable tool apron (9) and operative clamp edge (14) middle part respectively； When switching hydraulic cylinder elongation, pushes trapezoidal supporting block (8) to slide, stretched so that promotion activity tool apron (9) cuts arm (6) inner cavity from pincers Out, movable tool apron (9) pushes the activity being mounted on pincers sword sliding slot (13) by pushing kinematic link (11) at the same time Sword (14) are clamped to two Slideslips, reserve protrusions space to movable tool apron (9)；Steel blade (10) is fixed by screws in movable blade On seat.

2. a kind of pincers using movable cutting edge according to claim 1, which are cut, embraces multifunctional rescue accessory, it is characterised in that: living Moving knife seat (9) generally ' L ' shape, axial symmetry are mounted on two pincers and cut in switching part, guarantee that the course of work is staggeredly superimposed upon Together, the both ends of movable tool apron are placed in the sliding slot that pincers are cut on the arm of arm inner cavity, and all radial forces that movable tool apron is subject to all are unloaded Pincers are loaded in cut on arm；The shearing force that movable tool apron is subject to is directly delivered to pincers by trapezoidal supporting block and cuts on arm floor, passes through ladder The inclined-plane mechanical self-latching of shape supporting block prevents in shear transfer to switching hydraulic cylinder.

3. a kind of pincers using movable cutting edge according to claim 1, which are cut, embraces multifunctional rescue accessory, it is characterised in that: pass Dynamic connecting rod (11) are four total, and each section pincers are cut there are two switching part includes, and the two sides of movable tool apron are mounted on, will be movable Pincers sword (14) and movable tool apron (9) link together, and ensure that the linkage of movable tool apron and operative clamp edge；The length of kinematic link Meet when movable tool apron is fully located at pincers and cuts the inner cavity of arm (6), two operative clamp edges are closed completely together, are guaranteed at inner cavity In completely enclosed state；When movable tool apron is fully extended, two operative clamp edges fit together with movable tool apron completely, protect Card pincers are cut arm inner cavity and are completely enclosed, and prevent sundries from entering pincers and cut arm inner cavity, cause mechanism blockage and parts depreciation.

4. a kind of pincers using movable cutting edge according to claim 1, which are cut, embraces multifunctional rescue accessory, it is characterised in that: pincers Cutting arm (6) is non complete symmetry part；Pincers cut arm main body it is symmetrical, include with pedestal (1) hinged hinge hole, be supplied to work The plane of dynamic pincers sword (14) installation site, the inner cavity of switching part is cut for placement pliers；Pincers, which cut arm and cut hydraulic cylinder (5) with pincers, to be connect Hinge hole offset main body symmetry axis side cut the distance of hydraulic cylinder maximum radius not less than pincers, interlock so that pincers are cut hydraulic cylinder It places.

5. a kind of pincers using movable cutting edge according to claim 1, which are cut, embraces multifunctional rescue accessory, it is characterised in that: right It clamps the tilt cylinder mechanism cut and is optimized design, setting, which clamps, cuts hydraulic cylinder and the hinged position of pedestal cuts arm with pincers and pedestal is hinged Position distance be clamp shearing machine frame length, it is determined that pincers cut the distance between two hinge holes of arm and clamp shearing machine frame length Ratio be 0.6153, pincers cut hydraulic cylinder initial length and clamp shearing machine frame length ratio be 0.6831.

6. a kind of pincers using movable cutting edge according to claim 1, which are cut, embraces multifunctional rescue accessory, it is characterised in that: right It embraces the tilt cylinder mechanism grabbed and is optimized design, setting, which is embraced, grabs hydraulic cylinder and the hinged position and holding claw and pedestal of pedestal hingedly The distance of position is to embrace the length of grapple frame, it is determined that the ratio of the distance between two hinge holes of holding claw and the length for embracing grapple frame Example is 0.3638, and embracing and grabbing the ratio of the length under hydraulic cylinder retracted state and the length for embracing grapple frame is 0.8124.