CN115263379A

CN115263379A - Arch grabbing mechanism

Info

Publication number: CN115263379A
Application number: CN202210979137.0A
Authority: CN
Inventors: 毛波; 王慧民; 龚俊; 宋祖源; 蔡畅; 肖凌云; 曾詹辉; 阳乐多; 周鹤
Original assignee: Hunan Wuxin Tunnel Intelligent Equipment Co Ltd
Current assignee: Hunan Wuxin Tunnel Intelligent Equipment Co Ltd
Priority date: 2022-08-16
Filing date: 2022-08-16
Publication date: 2022-11-01
Also published as: WO2024036930A1

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

Arch grabbing mechanism

Technical Field

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

Background

In the installation process of the tunnel arch, after the tunnel arch installation vehicle is used for grabbing and fixing the arch, a constructor installs the arch. In the traditional construction process, the arch centering is usually assembled by adopting a manual arch centering or a single lifting appliance is used for grabbing the arch centering for installation. The manual installation wastes time and labor, the construction efficiency is low, and the personal safety risk is high; the single-sling installation mechanism has only one clamping position of the arch frame, and most of the arch frame is in the shape of circular arc, the arch frame is easy to be unstable in the grabbing and lifting process, and particularly obvious when the arch frame is erected after a plurality of arch frames are prefabricated. In addition, referring to the invention patent with application number CN106703844B, the clamping oil cylinder of the arch grabbing mechanism is generally arranged on the side of the supporting platform, the oil cylinder lacks protection in the process of changing the clamping and releasing states, the whole volume of the arch grabbing mechanism is increased, and the arch grabbing mechanism is easy to collide with other structures in the operation process, thereby affecting the flexibility of the arch grabbing mechanism.

Disclosure of Invention

In order to solve the technical problems, the invention provides an arch center grabbing mechanism, wherein two groups of clamping jaw assemblies are driven by one driving unit to grab synchronously, so that the grabbing stability of an arch center is improved, the telescopic direction of the driving unit can be arranged along the length direction of a supporting platform by changing the direction of force in space, and the compactness of the arch center grabbing mechanism is improved.

An arch center grabbing mechanism 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.

Furthermore, two sliding chutes which are symmetrically arranged are arranged in the limiting block; the end part of the clamp close to the limiting block is connected with a limiting pin; the limiting pins of the two clamps in the same group of clamping jaw assemblies are movably arranged in the two sliding grooves respectively.

Furthermore, a limit sleeve is rotatably sleeved on the limit pin; the limiting sleeve is movably arranged in the sliding groove.

Furthermore, the symmetric center planes of the two sliding grooves are the same as the symmetric center planes of the two clamping jaws.

Furthermore, the one end that the clamp was kept away from to the spacer pin is equipped with anti-disengaging device, anti-disengaging device is used for preventing the spacer pin roll-off from the spout.

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

Optionally, the clamping end of the clamp is detachably connected with a pressing block, and the pressing block is used for pressing the arch frame.

Furthermore, the supporting platform comprises a supporting part and bending parts which are bent downwards along two sides of the supporting part; the supporting part and the bending part are encircled to form an accommodating groove with a downward opening; the drive unit, the connecting frame and the limiting blocks are uniformly distributed in the accommodating groove.

Furthermore, the outer side surface of the bending part is provided with a hinged support, and the clamp is hinged to the hinged support.

Furthermore, the support part is connected with a U-shaped support frame.

Is advantageous in the effect is as follows: according to the arch frame grabbing mechanism provided by the invention, the direction of the acting force output by the driving unit can be changed in space through the connecting frame and the limiting block, so that the stretching direction of the driving unit can be arranged along the length direction of the supporting platform, the size of the grabbing mechanism is reduced, the driving unit is prevented from colliding with other structures in a tunnel in the stretching process, and the flexibility of the grabbing mechanism is improved; and be connected through a drive unit and two sets of clamping jaw assembly's link, make two sets of clamping jaw assembly can snatch in step to the bow member, avoid the bow member to produce the skew because of snatching desynchronously in the snatching process, improve the stability that the bow member snatched.

Drawings

FIG. 1 is a schematic view of the overall structure of an arch grabbing mechanism;

FIG. 2 is one of the schematic cross-sectional views of the arch grabbing mechanism along its length;

FIG. 3 isbase:Sub>A view taken along line A-A in FIG. 2 one of the cross-sectional views of the plane;

FIG. 4 isbase:Sub>A second cross-sectional view taken along the plane A-A in FIG. 2

FIG. 5 is a partial sectional view taken along line B-B of FIG. 2;

FIG. 6 is a schematic view of the clamp;

FIG. 7 is a schematic view of a pressure block hold down arch flange plate;

FIG. 8 is a schematic view of a press block pressing an arch web;

fig. 9 is a second schematic sectional view of the arch grabbing mechanism along its length direction.

Reference numerals: 1. a jaw assembly; 2. a support platform; 3. a drive unit; 4. an arch frame;

11. a connecting frame; 12. a limiting block; 13. clamping; 14. a first hinge point; 15. a second hinge point; 16. a third hinge point; 17. a fourth hinge point;

121. a chute;

131. a limit pin; 132. a limiting sleeve; 133. an anti-falling device; 134. briquetting;

21. a support portion; 22. a bending section; 23. accommodating grooves; 24. a hinged bracket; 25. a support frame;

41. a flange plate; 42. a web.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a releasable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

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 they do not conflict with each other.

Examples

The embodiment provides an arch grabbing mechanism, which is used for grabbing an arch 4 in a tunnel construction process, and is convenient for constructors to install the arch 4. Specifically, referring to fig. 1, the arch 4 gripping mechanism includes two sets of gripper assemblies 1, a support platform 2 and a driving unit 3. The two groups of clamping jaw assemblies 1 are arranged along the length direction of the supporting platform 2, namely, the clamping jaw assemblies 1 are respectively positioned at positions close to two end parts of the supporting platform 2, and the arch frame 4 is clamped on the supporting platform 2 through the two groups of clamping jaw assemblies 1. Because the bow member 4 is mostly arc, two sets of clamping jaw subassembly 1 is located the position that is close to 2 both ends of supporting platform respectively and makes and keep certain distance between two centre gripping positions, is difficult to the unstability when the bow member snatchs, lifts, found the arch.

Referring to fig. 2 to 4, the clamping jaw assembly 1 includes a connecting frame 11, a stop block 12 and two clamp jaws 13 arranged symmetrically. Referring to fig. 2, the connecting frame 11 is hinged to the supporting platform 2 to form a first hinge point 14, the connecting frame 11 is hinged to the driving unit 3 to form a second hinge point 15, and the connecting frame 11 is hinged to the limiting block 12 to form a third hinge point 16; the first hinge point 14, the second hinge point 15, and the third hinge point 16 may be arranged in a non-collinear triangular shape, or may be arranged in a collinear inclined state. The flexible direction of drive unit 3 is arranged along supporting platform 2's length direction, and drive unit 3's axis is parallel with supporting platform 2's length direction promptly to drive unit 3's both ends are articulated with link 11 of two sets of clamping jaw subassembly 1 respectively, and when drive unit 3 is flexible, drive two link 11 respectively and rotate around first pin joint 14, thereby drive stopper 12 and remove according to the rotation orbit of second pin joint 12. The clamp 13 is hinged with the support platform 2 to form a fourth hinge point 17, and the clamp 13 is further connected with the connecting frame 11 and rotates around the fourth hinge point 17 along with the movement of the connecting frame 11, so as to realize the clamping and releasing actions.

In this embodiment, the direction of the acting force output by the driving unit 3 can be changed in space through the connecting frame 11 and the limiting block 12, so that the telescopic direction of the driving unit 3 can be arranged along the length direction of the supporting platform 2, the size of the grabbing mechanism is reduced, collision between the driving unit 3 and other structures in a tunnel in the telescopic process is avoided, and the flexibility of the grabbing mechanism is improved; and be connected through a drive unit 3 and the link 11 of two sets of clamping jaw subassembly 1, make two sets of clamping jaw subassemblies 1 can snatch 4 in step, avoid the arch 4 to produce the skew because of snatching desynchronously in the snatching process, improve the stability that arch 4 snatched.

Specifically, referring to fig. 2 and 3, two symmetrically arranged sliding grooves 121 are arranged inside the limiting block 12, the sliding grooves 121 are kidney-shaped holes or special-shaped holes, and the symmetric central planes of the two sliding grooves 121 are the same as the symmetric central planes of the two clamps 13; the end part of the clamp 13 close to the limiting block 12 is connected with a limiting pin 131, and the limiting pin 131 is vertical to the clamp 13 in the horizontal direction; the limiting pins 131 of the two clamps 13 in the same set of clamping jaw assembly 1 are movably disposed in the two sliding slots 121, specifically, the limiting pins 131 can not only move relative to the limiting block 12 along the length direction of the sliding slots 121, but also move relative to the limiting block 12 along the axial direction of the limiting pins 131. When the driving unit 3 drives the limiting block 12 to move along the rotating track of the connecting frame 11, the limiting block 12 drives the two clamps 13 to synchronously clamp or release, so that the two clamps 13 in the same group of clamping jaw assemblies 1 synchronously act, and the problems that the clamped arch 4 deviates from the center of the arch grabbing mechanism due to asynchronization of the clamps 13 and the arch 4 is unstable due to the fact that the clamp 13 on one side pushes the arch 4 to contact with the other side in the clamping process are avoided.

Specifically, the process of clamping the arch 4 with the jaw assembly 1 includes: referring to fig. 2, the driving unit 3 is extended to push the connecting frame 11 to rotate counterclockwise, so that the limiting block 12 moves toward the direction of the clamp 13, referring to fig. 3, and at the same time, the limiting block 12 moves away from the supporting platform 2, since the clamp 13 is hinged to the supporting platform 2, the clamp 13 rotates around the fourth hinge point 17, the two limiting pins 131 move in the sliding grooves 121 and move away from each other, until the clamp 13 clamps the arch frame 4, and the final clamping state is as shown in fig. 4.

The process of loosening the arch 4 by the clamping jaw assembly 1 comprises the following steps: referring to fig. 2, the driving unit 3 is shortened, the connecting frame 11 is pulled to rotate clockwise, the limit block 12 moves in a direction away from the clamp 13, referring to fig. 4, and the limit block 12 moves in a direction close to the supporting platform 2, since the clamp 13 is hinged to the supporting platform 2, the clamp 13 rotates around the fourth hinge point 17, the two limit pins 131 move in the sliding groove 121 and approach each other until the limit block 12 abuts against the supporting platform 2, and referring to fig. 3, the relaxed state is shown.

As a further improvement of this embodiment, a limiting sleeve 132 is rotatably sleeved on the limiting pin 131, the limiting sleeve 132 is preferably made of nylon, and the limiting sleeve 132 is movably disposed in the sliding groove 121. In the clamping and releasing processes of the clamping jaw assembly 1, the limiting sleeve 132 can avoid the rigid friction between the limiting pin 131 and the limiting block 12, so that the limiting pin 131 can move smoothly in the sliding groove 121, and the service life of the limiting pin 131 is prolonged.

As a further improvement of this embodiment, an end of the stopper pin 131 away from the clamp 13 is provided with a retaining device 133, the size of the retaining device 133 is larger than that of the sliding slot 121, and the retaining device 133 is used for preventing the stopper pin 131 from sliding out of the sliding slot 121. In the relative movement process of the limiting pin 131 and the limiting block 12, the limiting pin 131 has relative movement not only along the length direction of the sliding groove 121, but also along the axial direction of the limiting pin 131, and the anti-falling device 133 is arranged to prevent the limiting pin 131 and the limiting block 12 from being separated from the sliding groove 121 when moving along the axial direction of the limiting pin 131.

Optionally, in this embodiment, as shown in fig. 2, the driving unit 3 may be a one-way cylinder, as shown in fig. 9, or may be a two-way cylinder. In the telescopic process of the oil cylinder, the two clamping jaw assemblies 1 are synchronously driven to clamp or loosen.

Optionally, in this embodiment, the clamping end of the clamp 13 may be an integrated structure to directly clamp the arch frame 4, or may be connected to a detachable pressing block 134, as shown in fig. 7 and 8, the pressing block 134 with a different shape may be replaced to press the flange plate 41 or the web plate 42 of the arch frame 4. The pressing blocks 134 in different shapes are replaced according to different arch frame 4 structures, so that the grabbing applicability of the arch frame 4 is improved.

Specifically, referring to fig. 1 and 2, the support platform 2 includes a support portion 21 and bending portions 22 bent downward along two sides of the support portion 21; the supporting portion 21 and the bending portion 22 enclose an accommodating groove 23 with a downward opening, and the driving unit 3, the connecting frame 11 and the limiting block 12 are uniformly arranged in the accommodating groove 23. The holding tank 23 provides protection for the driving unit 3, the connecting frame 11 and the limiting block 12, and the collision of the parts in the action process of the arch frame 4 grabbing mechanism is avoided, so that the structure of the arch frame grabbing mechanism is more compact, the size is smaller, and the flexibility in the operation process is improved.

Specifically, referring to fig. 1, a hinge bracket 24 is disposed on an outer side surface of the bent portion 22, and the clamp 13 is hinged to the hinge bracket 24, so that the clamp 13 is hinged to a side surface of the supporting platform 2, thereby further improving the compactness of the structure. The top end of the supporting part 21 is connected with a U-shaped supporting frame 25, deflection of the arch frame 4 is limited by the supporting frame 25, the phenomenon that the arch frame 4 falls into the inner sides of the two clamps 13 due to misoperation in the process of placing or grabbing the arch frame 4 is avoided, and the reliability in the process of grabbing the arch frame 4 is improved.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. An arch center grabbing mechanism is characterized by comprising 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 to 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.

2. The arch grabbing mechanism of claim 1, wherein two symmetrically arranged sliding grooves are formed in the limiting block; the end part of the clamp close to the limiting block is connected with a limiting pin; the limiting pins of the two clamps in the same group of clamping jaw assemblies are movably arranged in the two sliding grooves respectively.

3. The arch grabbing mechanism of claim 2, wherein a limit sleeve is rotatably sleeved on the limit pin; the limiting sleeve is movably arranged in the sliding groove.

4. An arch grabbing mechanism as claimed in claim 2, wherein the centre of symmetry plane of both runners is the same as the centre of symmetry plane of both clamps.

5. The arch grabbing mechanism as claimed in claim 2, wherein the end of the stop pin away from the clamp is provided with an anti-slip device for preventing the stop pin from slipping out of the sliding slot.

6. An arch grabbing mechanism as claimed in claim 1, wherein the drive unit is a one-way cylinder or a two-way cylinder.

7. The arch grabbing mechanism of claim 1, wherein the clamping end of the clamp is detachably connected with a pressing block, and the pressing block is used for pressing the arch.

8. The arch grabbing mechanism of any one of claims 1 to 7, wherein the support platform comprises a support portion and bending portions bent downward along two sides of the support portion; the supporting part and the bending part are encircled to form an accommodating groove with a downward opening; the drive unit, the connecting frame and the limiting blocks are uniformly distributed in the accommodating groove.

9. An arch grabbing mechanism as claimed in claim 8, wherein the outer side of the bent part is provided with a hinged bracket to which the clamp is hinged.

10. An arch grabbing mechanism according to claim 8, it is characterized in that the support part is connected with a U-shaped support frame.