CN115263379A - An arch grabbing mechanism - Google Patents

Abstract

The invention relates to the technical field of arch center mounting equipment, in particular to an arch center grabbing mechanism which comprises two groups of clamping jaw assemblies, a supporting platform and a driving unit; the two groups of clamping jaw assemblies are arranged along the length direction of the supporting platform and are used for clamping the arch on the supporting platform; the clamping jaw assembly comprises a connecting frame, a limiting block and two clamps which are oppositely arranged; the connecting frame is hinged with the supporting platform, the driving unit and the limiting block respectively; two ends of the driving unit are respectively hinged with the connecting frames of the two groups of clamping jaw assemblies; when the driving unit stretches, the connecting frame is driven to rotate around a hinge point, so that the limiting block is driven to move; the clamp is hinged with the supporting platform and connected with the connecting frame, and the clamp moves along with the connecting frame and rotates around a hinged point of the clamp. The invention can improve the compactness of the arch frame grabbing mechanism and the stability of the grabbing process.

Description

An arch grabbing mechanism

technical field

The invention relates to the technical field of arch installation equipment, in particular to an arch grabbing mechanism.

Background technique

During the installation process of the tunnel arch, it is necessary to use the tunnel arch installation vehicle to grab and fix the arch, and then the construction personnel will install the arch. In the traditional construction process, artificial arches are often assembled or a single spreader is used to grab the arches for installation. Manual installation is time-consuming and labor-intensive, with low construction efficiency and high personal safety risks; the single-sling installation mechanism has only one clamping position of the arch frame, and most of the arch frames are arc-shaped, so it is easy to lose stability during the grabbing and lifting process of the arch frame , especially when the multi-arch frame is prefabricated and the arch is carried out. In addition, referring to the invention patent with application number CN106703844B, the clamping cylinder of the arch grabbing mechanism is generally set on the side of the support platform, and the oil cylinder lacks protection during the change of clamping and relaxing states, and the overall volume of the arch grabbing mechanism increases , It is easy to collide with other structures during the operation, which affects the flexibility of the arch grabbing mechanism.

Contents of the invention

In order to solve the above-mentioned technical problems, the present invention provides an arch grabbing mechanism, which drives two groups of jaw assemblies to grab synchronously through a drive unit, improves the stability of arch grabbing, and changes the force in the space direction, so that the telescopic direction of the drive unit can be arranged along the length direction of the support platform, and improve the compactness of the arch grabbing mechanism. The specific technical solution is as follows.

An arch grabbing mechanism, comprising two sets of clamping jaw assemblies, a support platform and a drive unit; two sets of clamping jaw assemblies are arranged along the length direction of the support platform, and are used to clamp the arch frame on the support platform; the clamping jaws The assembly includes a connecting frame, a limiting block, and two oppositely arranged clamps; the connecting frame is respectively hinged with the support platform, the driving unit, and the limiting block; The connecting frame is hinged; when the drive unit stretches, it drives the connecting frame to rotate around a hinge point, thereby driving the limit block to move; the clamp is hinged to the support platform and connected to the connecting frame, and the clamp moves around with the connecting frame. Its hinge point turns.

Further, there are two symmetrically arranged slide grooves in the limiting block; the limit pin is connected to the end of the clamp close to the limiting block; the limiting pins of the two clamps in the same set of jaw assemblies Respectively movably placed in two chutes.

Further, a limit sleeve is rotatably sleeved on the limit pin; the limit sleeve is movably placed in the sliding groove.

Further, the center planes of symmetry of the two sliding grooves are the same as the center planes of symmetry of the two jaws.

Further, the end of the limit pin away from the clamp is provided with an anti-off device, and the anti-off device is used to prevent the limit pin from slipping out of the chute.

Optionally, the drive unit is a one-way oil cylinder or a two-way oil cylinder.

Optionally, a pressing block is detachably connected to the clamping end of the clamp, and the pressing block is used to compress the arch.

Further, the support platform includes a support part and a bending part bent downward along both sides of the support part; the support part and the bending part surround a receiving groove with an opening downward; the drive unit, the connecting The frame and the limit block are all arranged in the accommodating groove.

Further, the outer surface of the bending part is provided with a hinged bracket, and the clamp is hinged on the hinged bracket.

Further, the support part is connected with a support frame of "Xiang" shape.

Beneficial effects: The arch grabbing mechanism provided by the present invention can change the direction of the force output by the drive unit in space through the connecting frame and the limit block, so that the telescopic direction of the drive unit can be extended along the length of the support platform. The direction arrangement reduces the volume of the gripping mechanism, avoids collisions with other structures in the tunnel during the expansion and contraction of the drive unit, and improves the flexibility of the gripping mechanism; The two sets of clamping claw assemblies can synchronously grasp the arch, avoiding the deviation of the arch due to asynchronous grasping during the grasping process, and improving the stability of the arch grasping.

Description of drawings

Fig. 1 is the overall structural schematic diagram of arch grasping mechanism;

Fig. 2 is one of the cross-sectional schematic diagrams of the arch grasping mechanism along its length direction;

Fig. 3 is one of sectional views along A-A plane in Fig. 2;

Figure 4 is the second cross-sectional view along the A-A plane in Figure 2

Fig. 5 is a partial sectional view along B-B in Fig. 2;

Figure 6 is a schematic structural view of the clamp;

Fig. 7 is the schematic diagram that briquetting block compresses arch flange plate;

Fig. 8 is the schematic diagram that briquetting block compresses arch web;

Fig. 9 is the second schematic cross-sectional view of the arch grabbing mechanism along its length direction.

Reference signs: 1. Gripper assembly; 2. Support platform; 3. Drive unit; 4. Arch frame;

11. Connecting frame; 12. Limiting block; 13. Clamp; 14. First hinge point; 15. Second hinge point; 16. Third hinge point; 17. Fourth hinge point;

121, chute;

131, limit pin; 132, limit sleeve; 133, anti-off device; 134, briquetting block;

21. Supporting part; 22. Bending part; 23. Accommodating groove; 24. Hinged bracket; 25. Supporting frame;

41, flange plate; 42, web plate.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Disconnected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as there is no conflict with each other.

Example

This embodiment provides an arch grabbing mechanism, which is used for grabbing the arch 4 during tunnel construction, and is convenient for construction personnel to install the arch 4 . Specifically, as shown in FIG. 1 , the grabbing mechanism of the arch 4 includes two sets of jaw assemblies 1 , a supporting platform 2 and a driving unit 3 . The two groups of jaw assemblies 1 are arranged along the length direction of the support platform 2 , that is, they are respectively located near both ends of the support platform 2 , and the arch 4 is clamped on the support platform 2 by the two sets of jaw assemblies 1 . Because the arch frame 4 is mostly arc-shaped, the jaw assemblies 1 of the two groups are respectively located near the two ends of the support platform 2 so that a certain distance is kept between the two clamping positions, and the arch frame grabs and lifts , It is not easy to lose stability when arching.

Referring to FIGS. 2 to 4 , the jaw assembly 1 includes a connecting frame 11 , a limiting block 12 and two relatively symmetrically arranged clamps 13 . 2, the connecting frame 11 is hinged with the supporting platform 2 to form a first hinge point 14, and the connecting frame 11 is hinged with the driving unit 3 to form a second hinge point 15. The connecting frame 11 and the limit block 12 The hinge forms the third hinge point 16; the first hinge point 14, the second hinge point 15, and the third hinge point 16 can be arranged in a non-collinear triangle shape, or in a collinear inclined state. The telescopic direction of the drive unit 3 is arranged along the length direction of the support platform 2, that is, the axis of the drive unit 3 is parallel to the length direction of the support platform 2, and the two ends of the drive unit 3 are connected to the connecting frames of the two sets of jaw assemblies 1 respectively. 11 hinged, when the drive unit 3 expands and contracts, the two connecting frames 11 are respectively driven to rotate around the first hinge point 14, thereby driving the limit block 12 to move according to the rotation track of the second hinge point 12. The clamp 13 is hinged with the support platform 2 to form a fourth hinge point 17, and the clamp 13 is also connected to the connecting frame 11, and rotates around the fourth hinge point 17 as the connecting frame 11 moves, thereby realizing clamping and relaxation movements.

In this embodiment, the direction of the force output by the drive unit 3 can be changed in space through the connecting frame 11 and the limit block 12, so that the telescopic direction of the drive unit 3 can be arranged along the length direction of the support platform 2, reducing The size of the gripping mechanism is reduced, the driving unit 3 is prevented from colliding with other structures in the tunnel during the expansion and contraction process, and the flexibility of the gripping mechanism is improved; and a driving unit 3 is connected with the connecting frames 11 of two groups of jaw assemblies 1, so that The two sets of jaw assemblies 1 can grasp the arch 4 synchronously, avoiding the deviation of the arch 4 due to asynchronous grasping during the grasping process, and improving the stability of the arch 4 grasping.

Specifically, as shown in FIG. 2 and FIG. 3 , two symmetrically arranged sliding slots 121 are arranged inside the limiting block 12, and the sliding slots 121 are waist-shaped holes or special-shaped holes. The center plane of symmetry is the same as the center plane of symmetry of the two clamps 13; the end of the clamp 13 near the limit block 12 is connected with a limit pin 131, and the limit pin 131 is horizontally aligned with the clamp 13 vertical; the limit pins 131 of the two clamps 13 in the same set of jaw assemblies 1 are respectively movably placed in the two chute 121, specifically, the limit pin 131 can not only move along the chute 121 moves relative to the limit block 12 in the length direction, and can also move relative to the limit block 12 along the axial direction of the limit pin 131 . When the drive unit 3 drives the limit block 12 to move along the rotation track of the connecting frame 11, the limit block 12 drives the two clamps 13 to perform clamping or loosening actions synchronously, thereby realizing two clamps in the same set of jaw assemblies 1 The pliers 13 act synchronously, avoiding the center of the arch 4 after clamping caused by the asynchronous clamping of the clamps 13, and the possibility that the clamp 13 on one side may push the arch 4 and the frame 4 during the clamping process. The contact on the other side causes the problem of the instability of the arch 4.

Specifically, the process of clamping the arch 4 with the jaw assembly 1 includes: referring to FIG. 2 , extending the drive unit 3 , pushing the connecting frame 11 to rotate counterclockwise, and making the stopper 12 face the clamp 13, move in the direction where 13 is located, as shown in FIG. 3 , and at the same time make the stop block 12 move toward the direction away from the support platform 2, because the clamp 13 is hinged with the support platform 2, so that the clamp 13 rotates around the fourth hinge point 17, The two limit pins 131 move in the sliding groove 121 and move away from each other until the clamp 13 clamps the arch 4 , and its final clamping state is shown in FIG. 4 .

The process of using the jaw assembly 1 to loosen the arch 4 includes: referring to FIG. 2 , shortening the drive unit 3, pulling the connecting frame 11 to rotate clockwise, and moving the limit block 12 toward a direction away from the clamp 13, Referring to Fig. 4, the limit block 12 is moved towards the direction close to the support platform 2 at the same time, since the clamp 13 is hinged with the support platform 2, the clamp 13 is rotated around the fourth hinge point 17, and the two limit pins 131 Move in the chute 121 and approach each other until the limit block 12 abuts against the support platform 2 , and its relaxed state is shown in FIG. 3 .

As a further improvement of this embodiment, the limit pin 131 is rotatably sleeved with a limit sleeve 132, the limit sleeve 132 is preferably made of nylon, and the limit sleeve 132 is movably placed Inside the chute 121. During the clamping and loosening process of the clamping jaw assembly 1, the rigid friction between the limiting pin 131 and the limiting block 12 can be avoided by using the limiting sleeve 132, so that the limiting pin 131 can move smoothly in the chute 121 , and prolong the service life of the limit pin 131.

As a further improvement of this embodiment, the end of the limit pin 131 away from the clamp 13 is provided with an anti-off device 133 whose size is larger than the size of the chute 121, and the anti-off device 133 is used to prevent The limiting pin 131 slides out from the slide slot 121 . During the relative movement between the limit pin 131 and the limit block 12, the limit pin 131 not only has a relative movement along the length direction of the chute 121, but also has a relative movement along the axial direction of the limit pin 131. The release device 133 prevents the limiting pin 131 and the limiting block 12 from disengaging from the slide groove 121 when moving along the axial direction of the limiting pin 131 .

Optionally, in this embodiment, as shown in FIG. 2 , the drive unit 3 may be a one-way oil cylinder, and as shown in FIG. 9 , it may also be a two-way oil cylinder. During the stretching process of the oil cylinder, the two jaw assemblies 1 are synchronously driven to clamp or loosen.

Optionally, in this embodiment, the clamping end of the clamp 13 can be an integral structure to directly clamp the arch 4, or it can be connected to a detachable pressing block 134, referring to Fig. 7 and Fig. As shown in FIG. 8 , the flange plate 41 or the web 42 of the arch 4 can be compressed by changing the pressing block 134 of a different shape. The pressing blocks 134 of different shapes are replaced according to different structures of the arch 4, which improves the applicability of the arch 4 to grab.

Specifically, as shown in FIG. 1 and FIG. 2 , the support platform 2 includes a support portion 21 and a bending portion 22 bent downward along both sides of the support portion 21; the support portion 21 and the bending portion 22 Surrounding a receiving groove 23 with an opening downward, the driving unit 3 , the connecting frame 11 and the limiting block 12 are all arranged in the receiving groove 23 . The accommodating groove 23 provides protection for the driving unit 3, the connecting frame 11, and the limit block 12, so as to avoid collisions with these components during the action of the arch 4 grasping mechanism, so that the structure of the arch grasping mechanism is more compact and the volume is reduced. Smaller for greater flexibility during operations.

Specifically, as shown in FIG. 1 , the outer surface of the bent portion 22 is provided with a hinged bracket 24, the clamp 13 is hinged on the hinged bracket 24, and the clamp 13 is hinged to the side of the support platform 2, Further improve the compactness of the structure. The top of the support part 21 is connected with a "凵" type support frame 25, and the deflection of the arch 4 is limited by the support frame 25, so as to prevent the arch 4 from falling into the two sides due to operational errors in the process of placing or grabbing the arch 4. The inner side of the clamp 13 improves the reliability of the process of grabbing the arch 4 .

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or changes derived therefrom are still within the scope of protection of the present invention.

Claims (10)

1. An arch grabbing mechanism is characterized in that it comprises two groups of jaw assemblies, a support platform and a drive unit; two groups of jaw assemblies are arranged along the length direction of the support platform, and are used to clamp the arch to the support platform above; the jaw assembly includes a connecting frame, a limiting block, and two oppositely arranged clamps; the connecting frame is respectively hinged to the support platform, the driving unit, and the limiting block; the two ends of the driving unit are respectively connected to The connecting frames of the two sets of jaw assemblies are hinged; when the drive unit stretches, it drives the connecting frame to rotate around a hinge point, thereby driving the limit block to move; the clamp is hinged to the support platform and connected to the connecting frame. Rotates around its hinge point as the connecting frame moves. 2. An arch grabbing mechanism according to claim 1, characterized in that two symmetrically arranged slide grooves are arranged inside the limiting block; the ends of the clamps close to the limiting block are limitedly connected. Position pins; the limit pins of the two clamps in the same jaw assembly are respectively movably placed in the two slide grooves. 3. An arch grabbing mechanism according to claim 2, characterized in that, the limit pin is rotatably fitted with a limit sleeve; the limit sleeve is movably placed in the chute Inside. 4. An arch grabbing mechanism according to claim 2, characterized in that, the center planes of symmetry of the two chutes are the same as the center planes of symmetry of the two clamps. 5. A kind of arch grabbing mechanism according to claim 2, characterized in that, the end of the limit pin away from the clamp is provided with an anti-off device, and the anti-off device is used to prevent the limit pin from slipping slides out of the slot. 6. An arch grabbing mechanism according to claim 1, wherein the driving unit is a one-way oil cylinder or a two-way oil cylinder. 7 . The arch grabbing mechanism according to claim 1 , wherein a pressing block is detachably connected to the gripping end of the clamp, and the pressing block is used to compress the arch. 7 . 8. An arch grabbing mechanism according to any one of claims 1 to 7, characterized in that, the support platform includes a support portion and a bending portion bent downward along both sides of the support portion; The supporting part and the bending part are surrounded to form an accommodating groove with an opening downward; the driving unit, the connecting frame and the limit block are all arranged in the accommodating groove. 9 . The arch grabbing mechanism according to claim 8 , wherein a hinged bracket is provided on the outer surface of the bent portion, and the clamp is hinged on the hinged bracket. 10 . 10 . The arch grabbing mechanism according to claim 8 , characterized in that, the support part is connected with a "Xiang" type support frame. 11 .

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