Arch lifting mechanism for tunnel trolley
By designing an automatically deployable arch frame lifting mechanism, the problem of low efficiency in manual arch frame deployment in existing technologies has been solved, achieving efficient lifting and deployment of multiple arch frames.
Patent Information
- Application Number
- CN202520751075.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-04-21
AI Technical Summary
In existing tunnel construction, the arch frame lifting mechanism of the vertical arch trolley requires manual unfolding of the folded arch frame, which is inefficient and can only lift one arch frame at a time.
An arch frame lifting mechanism consisting of a first and a second rotating arm is adopted. Driven by an electric or hydraulic rotary table, and combined with a crank arm and a spacer block, it can automatically unfold and lift multiple folding arch frames.
It achieves high efficiency by eliminating the need for manual unfolding and can simultaneously lift and fully unfold multiple folding arch frames, saving time and effort.
Smart Images
Figure CN223854275U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model discloses a kind of arch lifting mechanisms for tunnel trolley, relate to tunnel construction equipment technical field. BACKGROUND
[0002] In tunnel construction, arch needs to be used to support excavated tunnel. Arch is large in size and heavy in weight, and needs to be lifted by special arch erecting trolley, then transported to working face, and finally installed by lifting and anchoring.
[0003] In prior art, the arch lifting mechanism of arch erecting trolley has the following defects:
[0004] 1. In order to facilitate assembly, the latest arch adopts three-section hinged folding structure, and the segmented arch on both sides needs to be lifted manually to unfold the folded arch during lifting, so as to realize rigid connection of the whole arch.
[0005] 2. Only one arch can be lifted at a time, which is low in efficiency. INVENTION CONTENTS
[0006] In order to overcome the deficiencies in the background art, the utility model discloses an arch lifting mechanism for tunnel trolley, which adopts the following technical solutions:
[0007] An arch lifting mechanism for tunnel trolley is used to lift a folded arch. The arch lifting mechanism comprises a first rotating arm provided on a tunnel trolley stand and a second rotating arm provided at the free end of the first rotating arm, and a crank arm for forking the folded arch is provided at the free end of the second rotating arm. During operation, the first rotating arm and the second rotating arm are rotated in cooperation to lift and unfold the folded arch.
[0008] Further improved technical solutions: the crank arm is rotatably hinged at the free end of the second rotating arm.
[0009] Further improved technical solutions: the rotating end of the first rotating arm is provided at the upper part of the tunnel trolley stand.
[0010] Further improved technical solutions: the length of the second rotating arm is greater than that of the first rotating arm.
[0011] Further improved technical solutions: the first rotating arm and the second rotating arm are driven by an electric rotary disc or a hydraulic rotary disc.
[0012] Further improved technical solutions: a convex arc surface and a plurality of isolation blocks are provided on the crank arm.
[0013] After implementing the above technical solutions, the utility model has the following beneficial effects:
[0014] The two rotating arms of the arch lifting mechanism have sufficient lifting height and sufficient degrees of freedom, which can not only lift the folded arch, but also completely unfold the folded arch. Compared with the background art, the arch lifting mechanism does not need manual unfolding of the folded arch, which is time-saving, labor-saving and efficient. BRIEF DESCRIPTION OF DRAWINGS
[0015] BRIEF DESCRIPTION OF DRAWINGS Figure 1 A perspective structural schematic diagram of the arch lifting mechanism is shown.
[0016] BRIEF DESCRIPTION OF DRAWINGS Figures 2-6 A schematic diagram of the arch in the lifting process is shown.
[0017] In the drawings: 1, a stand column; 2, a first rotating arm; 3, a first rotary disc; 4, a second rotating arm; 5, a second rotary disc; 6, a crank; 7, a folded arch; 8, a vertical arch mechanical claw. DETAILED DESCRIPTION
[0018] The preferred embodiments of the present utility model are described below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present utility model, and are not intended to limit the protection scope of the present utility model. It should be noted that in the description of the present utility model, the terms "front", "back", "up", "down", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the direction or positional relationship terms shown in the drawings, which are only for the convenience of description, and are not intended to indicate or imply that the device or element must have a specific orientation and positional relationship, therefore it cannot be understood as a limitation on the present utility model. It should also be noted that in the description of the present utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or the connection between two components. For those skilled in the art, the specific meaning of the above terms in the present utility model can be understood according to the specific circumstances.
[0019] An arch lifting mechanism for a tunnel trolley relates to the field of tunnel construction equipment, and is mainly used to solve the problem of manual unfolding of a folded arch in the prior art. The composition structure and working principle of the vertical arch mechanical arm are described below.
[0020] The rear end of the tunnel trolley has two left and right stand columns, and each stand column is provided with a set of arch lifting mechanism.
[0021] Referring to the drawings Figure 1The arch lifting mechanism mainly consists of a first rotating arm 2, a second rotating arm 4 and a crank arm 6, wherein the rotating end of the first rotating arm 2 is arranged at the upper part of the tunnel trolley stand 1, the rotating end of the second rotating arm 4 is arranged at the free end of the first rotating arm 2, and the length of the second rotating arm 4 is greater than that of the first rotating arm 2.
[0022] The first rotating arm 2 is driven to rotate by a first rotary disc 3, and the second rotating arm 4 is driven to rotate by a second rotary disc 5, and the first rotary disc 3 and the second rotary disc 5 can independently rotate in the vertical plane. The first rotary disc 3 and the second rotary disc 5 can be electric rotary discs or hydraulic rotary discs.
[0023] The crank arm 6 is horizontally arranged at the free end of the second rotating arm 4 and is used to fork up the folded arch 7. In the embodiment, the crank arm 6 is hinged at the free end of the second rotating arm 4 and can freely rotate. In order to fork up multiple arches at a time, multiple isolation blocks are arranged on the crank arm 6. In order to reduce friction, a convex arc surface in contact with the folded arch 7 is arranged on the crank arm 6.
[0024] Working principle:
[0025] Referring to the accompanying drawings Figure 2 The first rotating arm 2 and the second rotating arm 4 are rotated downward, the folded arch 7 is transferred to the rear end of the tunnel trolley by using a forklift, and the middle section of the folded arch 7 is forked on the crank arm 6.
[0026] Referring to the accompanying drawings Figure 3 The first rotating arm 2 and the second rotating arm 4 are cooperatively rotated to lift the folded arch 7 upward.
[0027] Referring to the accompanying drawings Figure 4 When lifted to a specified height, the arch standing mechanical claw 8 grabs the middle section of the folded arch 7.
[0028] Referring to the accompanying drawings Figures 5-6 After the middle section of the folded arch 7 is fixed by the arch standing mechanical claw 8, the first rotating arm 2 and the second rotating arm 4 continue to cooperatively rotate, so that the side sections of the folded arch 7 are rotated outward until the folded arch 7 is completely unfolded. Then, the side sections and the middle section are connected by using bolts to form a complete arch.
[0029] Summary: The two rotating arms of the arch lifting mechanism have a large enough lifting height and enough degrees of freedom, which not only can lift the folded arch, but also can completely unfold the folded arch.
[0030] It is worth noting that the contents not described in detail in the above embodiment are prior art. It is also worth noting that any addition, replacement and improvement made by those skilled in the art under the structure and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. An arch lifting mechanism for a tunnel jumbo for lifting a folding arch, characterized in that: The arch lifting mechanism comprises a first rotating arm provided on a tunnel trolley column at a rotating end, and a second rotating arm provided at a free end of the first rotating arm at a rotating end, and a crank provided at a free end of the second rotating arm for lifting and unfolding the folded arch.
2. The arch lifting mechanism for a tunnel jumbo as claimed in claim 1, characterized in that: The crank is rotatably hinged at the free end of the second rotating arm.
3. The arch lifting mechanism for a tunnel jumbo as claimed in claim 1, characterized in that: The rotating end of the first rotating arm is provided on the upper part of the tunnel trolley column.
4. The arch lifting mechanism for a tunnel jumbo as claimed in claim 1, characterized in that: The length of the second rotating arm is greater than that of the first rotating arm.
5. An arch raising mechanism for a tunnel jumbo as claimed in claim 1, characterized in that: The first rotating arm and the second rotating arm are driven by an electric rotary disc or a hydraulic rotary disc.
6. An arch raising mechanism for a tunnel jumbo as claimed in claim 1, characterized in that: The crank is provided with a convex arc surface and a plurality of isolation blocks.