Adjustable double-layer propelling beam

Abstract

The utility model relates to the technical field of propelling beams, and provides an adjustable double-layer propelling beam which comprises a first propelling beam and a second propelling beam which are connected in a sliding mode, a power head installation base is connected to the first propelling beam in a sliding mode, and a driving chain wheel set is arranged on the second propelling beam. The first propelling beam and the second propelling beam are each provided with a plurality of driven chain wheels, and the driving chain wheel set is connected to the power head installation base after being in transmission connection with all the driven chain wheels through chains and used for driving the power head installation base to linearly slide along the first propelling beam and driving the first propelling beam to linearly slide along the second propelling beam. A plurality of pin holes are formed in the second propelling beam in the sliding direction of the first propelling beam, plug pins are matched in the pin holes, the first propelling beam is provided with a baffle abutting against the plug pins in a limiting mode, the length-adjustable double-layer propelling beam is achieved, the working efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of propulsion beams, in particular to an adjustable double-layer propulsion beam. Background Art

[0002] The propulsion beam is an important component used in underground engineering to support and propel the propulsion system of the tunnel boring machine. In actual underground engineering, due to the characteristics of different strata, tunnels of different depths need to be drilled, so propulsion beams of different lengths are required to meet different engineering requirements.

[0003] Existing propulsion beams are usually of fixed length. Once tunnels need to be drilled to different depths, propulsion beams of different lengths need to be replaced, which increases the time and cost of the project. Utility Model Content

[0004] The purpose of the utility model is to provide an adjustable double-layer propulsion beam to solve the above technical problems, improve work efficiency and reduce costs.

[0005] The embodiment of the utility model is realized through the following technical scheme: an adjustable double-layer propulsion beam, including a first propulsion beam and a second propulsion beam which are slidably connected, the first propulsion beam is slidably connected with a power head mounting seat, the second propulsion beam is provided with an active sprocket group, the first propulsion beam and the second propulsion beam are both provided with a plurality of driven sprockets, the active sprocket group is connected to all the driven sprockets through a chain and then connected to the power head mounting seat, which is used to drive the power head mounting seat to slide linearly along the first propulsion beam and drive the first propulsion beam to slide linearly along the second propulsion beam, the second propulsion beam is provided with a plurality of pin holes along the sliding direction of the first propulsion beam, the pin holes are matched with latches, and the first propulsion beam is provided with a baffle which abuts against the latch to limit the position.

[0006] Furthermore, the first propulsion beam and the second propulsion beam are both provided with a tensioning assembly for adjusting the tension of the chain.

[0007] Preferably, the tensioning assembly includes a tensioning shaft and a tensioning bolt, the driven sprockets at the ends of the first propulsion beam and the second propulsion beam are sleeved on the tensioning shaft, the ends of the first propulsion beam and the second propulsion beam are provided with avoidance grooves for avoiding linear motion of the tensioning shaft, and the tensioning bolt is vertically threadedly connected to the tensioning shaft.

[0008] Furthermore, a connecting pin is fixed to the power head mounting seat, and the connecting pin includes a first connecting plate and a second connecting plate. The first connecting plate and the second connecting plate are bolted and clamped on the power head mounting seat, and the first connecting plate fixes both ends of the chain respectively.

[0009] Furthermore, the driving sprocket set includes a driving wheel and guide wheels on both sides of the driving wheel for guiding the chain.

[0010] Furthermore, anti-collision buffer blocks are provided at both ends of the first propulsion beam along the sliding direction of the power head mounting seat.

[0011] Furthermore, the power head mounting seat is bolted to a first wear-resistant plate which is slidably engaged with an edge of the first propulsion beam.

[0012] Furthermore, the first propulsion beam is bolted to a second wear-resistant plate which is slidably engaged with an edge of the second propulsion beam.

[0013] Furthermore, a supporting drill structure for limiting the linear sliding of the first propulsion beam is provided at the end of the second propulsion beam.

[0014] The utility model has at least the following advantages and beneficial effects: the driving sprocket group and the driven sprocket drive the power head mounting seat to slide linearly along the first propulsion beam and drive the first propulsion beam to slide linearly along the second propulsion beam, and the baffle plate and the latch are used for limiting, thereby realizing a double-layer propulsion beam with adjustable length, improving work efficiency and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the structure of an adjustable double-layer propulsion beam provided by the utility model;

[0017] Figure 2 A cross-sectional view of an adjustable double-layer propulsion beam provided by the utility model;

[0018] Figure 3 For this utility model Figure 2 A partial enlarged view of the middle A;

[0019] Icons: 1-first propulsion beam, 10-avoidance groove, 11-baffle, 12-anti-collision buffer block, 13-second wear-resistant plate, 2-second propulsion beam, 20-pin hole, 21-plug pin, 3-power head mounting seat, 31-connecting pin, 311-first connecting plate, 312-second connecting plate, 32-first wear-resistant plate, 4-driving sprocket set, 41-driving wheel, 42-guide wheel, 5-driven sprocket, 6-chain, 7-tensioning assembly, 71-tensioning shaft, 72-tensioning bolt, 8-supporting drill structure. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example

[0023] like Figure 1 , Figure 2As shown, in this embodiment, an adjustable double-layer propulsion beam is mainly disclosed, which solves the problem that different lengths of propulsion beams are required for drilling different hole depths. The propulsion beam can be adjusted in length as needed to adapt to drilling requirements of different depths, improve work efficiency and reduce costs. Its main structure includes a first propulsion beam 1 and a second propulsion beam 2 that are slidably connected. A power head mounting seat 3 is slidably connected to the first propulsion beam 1, and an existing rock drill is installed on the power head mounting seat 3. A driving sprocket group 4 is provided on the second propulsion beam 2. The first propulsion beam 1 and the second propulsion beam 2 are both provided with a plurality of driven sprockets 5. The driving sprocket group 4 is connected to the power head mounting seat 3 after being transmission-connected with all the driven sprockets 5 through a chain 6, and is used to drive the power head mounting seat 3 to slide linearly along the first propulsion beam 1 and drive the first propulsion beam 1 to slide linearly along the second propulsion beam 2. The second propulsion beam 2 is provided with a plurality of pin holes 20 along the sliding direction of the first propulsion beam 1, and a latch 21 is matched in the pin hole 20. The first propulsion beam 1 is provided with a baffle 11 that is limitedly abutted against the latch 21. It should be noted that The friction resistance of the feed beam 1 sliding along the second feed beam 2 is greater than the friction resistance of the power head mounting seat 3 sliding along the first feed beam 1. Therefore, when the active sprocket group 4 is driven to rotate, the driven sprocket 5 transmits the power head mounting seat 3 to first slide along the first feed beam 1 until it slides to the end of the first feed beam 1. At this time, the power head mounting seat 3 is relatively fixed to the first feed beam 1, and then further drives the first feed beam 1 to slide in the same direction along the second feed beam 2. When the first feed beam 1 moves backward, that is, the first feed beam 1 and the second feed beam 2 When the overall length becomes longer, until the baffle 11 and the latch 21 are abutted and limited, the latch 21 is inserted into different pin holes 20 to abut and limit the baffle 11, so that the different lengths of the propulsion beam can be adjusted. When the first propulsion beam 1 moves forward, that is, when the first propulsion beam 1 and the second propulsion beam 2 shrink and overlap, the first propulsion beam 1 is limited and abutted against the support structure 8. The support structure 8 adopts the existing technology and is fixed to the end of the second propulsion beam 2. It works together with the baffle and the latch to limit the relative movement range of the first propulsion beam 1 and the second propulsion beam 2.

[0024] Furthermore, in the specific implementation, Figure 2As shown, the first propulsion beam 1 and the second propulsion beam 2 provided in the embodiment of the utility model are both provided with a tensioning assembly 7 for adjusting the tension of the chain 6. Specifically, the tensioning assembly 7 includes a tensioning shaft 71 and a tensioning bolt 72. The driven sprockets 5 at the ends of the first propulsion beam 1 and the second propulsion beam 2 are sleeved on the tensioning shaft 71. The ends of the first propulsion beam 1 and the second propulsion beam 2 are both provided with an avoidance groove 10 for avoiding the linear movement of the tensioning shaft 71. The tensioning bolt 72 is vertically threadedly connected to the tensioning shaft 71. It should be noted that the tensioning bolt 72 is vertically inserted into the two ends of the tensioning shaft 71 and does not touch the tensioning shaft 71. The driven sprocket 5 and the chain 6 at the ends of the first propulsion beam 1 and the second propulsion beam 2 interfere with each other. The tensioning bolt 72 can be respectively set at the two opposite end positions of the first propulsion beam 1 and the second propulsion beam 2, and the tensioning direction of the tensioning bolt 72 and the sliding direction of the tensioning shaft 71 along the avoidance groove 10 are both along the extension and contraction direction of the propulsion beam length. The tensioning bolt 72 is tightened to make the tensioning shaft 71 move in the avoidance groove 10 within a limited position, thereby driving the driven sprocket 5 at the ends of the first propulsion beam 1 and the second propulsion beam 2 to move, thereby adjusting and maintaining the tension of the chain 6, thereby improving the transmission efficiency and stability of the propulsion beam.

[0025] Furthermore, in the specific implementation, Figure 3 As shown, the power head mounting base 3 provided in the embodiment of the utility model is fixed with a connecting pin 31, and the connecting pin 31 includes a first connecting plate 311 and a second connecting plate 312. The first connecting plate 311 and the second connecting plate 312 are bolted and clamped on the power head mounting base 3. One end of the first connecting plate 311 is fixed to one end of the chain 6, and the other end of the first connecting plate 311 is fixed to the other end of the chain 6, thereby realizing a reliable connection between the power head mounting base 3 and the chain 6.

[0026] Furthermore, in a specific implementation, the above-mentioned active sprocket group 4 provided in the embodiment of the utility model includes a driving wheel 41 and a guide wheel 42. The driving wheel 41 is connected to the existing driving motor to provide a rotational driving force. The guide wheel 42 is arranged on both sides of the driving wheel 41 to guide the chain 6, adjust the direction of the chain 6, and increase the stability of the transmission.

[0027] Furthermore, in the specific implementation, anti-collision buffer blocks 12 are provided at both ends of the first propulsion beam 1 provided in the embodiment of the utility model along the sliding direction of the power head mounting seat 3, which can effectively absorb the collision impact and reduce the damage and failure of the beam body.

[0028] Furthermore, in the specific implementation, the above-mentioned power head mounting base 3 provided in the embodiment of the utility model is bolted with a first wear-resistant plate 32 that is slidably clamped to the edge of the first propulsion beam 1, and the first propulsion beam 1 is bolted with a second wear-resistant plate 13 that is slidably clamped to the edge of the second propulsion beam 2.

[0029] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adjustable double-layer propulsion beam, characterized in that: The invention comprises a first propulsion beam (1) and a second propulsion beam (2) which are slidably connected, the first propulsion beam (1) is slidably connected with a power head mounting seat (3), the second propulsion beam (2) is provided with a driving sprocket group (4), the first propulsion beam (1) and the second propulsion beam (2) are both provided with a plurality of driven sprockets (5), the driving sprocket group (4) is connected to the power head mounting seat (3) after being transmission-connected with all the driven sprockets (5) through a chain (6), and is used to drive the power head mounting seat (3) to slide linearly along the first propulsion beam (1) and drive the first propulsion beam (1) to slide linearly along the second propulsion beam (2), the second propulsion beam (2) is provided with a plurality of pin holes (20) along the sliding direction of the first propulsion beam (1), the pin holes (20) are matched with latch pins (21), and the first propulsion beam (1) is provided with a baffle plate (11) which is limitedly abutted against the latch pin (21).

2. An adjustable double-layer propulsion beam as claimed in claim 1, characterized in that: The first propulsion beam (1) and the second propulsion beam (2) are both provided with a tensioning assembly (7) for adjusting the tension of the chain (6).

3. An adjustable double-layer propulsion beam as claimed in claim 2, characterized in that: The tensioning assembly (7) comprises a tensioning shaft (71) and a tensioning bolt (72); the driven sprocket (5) at the end of the first propulsion beam (1) and the end of the second propulsion beam (2) is sleeved on the tensioning shaft (71); the end of the first propulsion beam (1) and the end of the second propulsion beam (2) are both provided with an avoidance groove (10) for avoiding the linear movement of the tensioning shaft (71); the tensioning bolt (72) is vertically threadedly connected to the tensioning shaft (71).

4. The adjustable double-layer propulsion beam according to claim 1, characterized in that: The power head mounting seat (3) is fixed with a connecting pin (31), and the connecting pin (31) comprises a first connecting plate (311) and a second connecting plate (312). The first connecting plate (311) and the second connecting plate (312) are bolt-connected and clamped on the power head mounting seat (3), and the first connecting plate (311) respectively fixes the two ends of the chain (6).

5. The adjustable double-layer propulsion beam according to claim 1, characterized in that: The driving sprocket set (4) comprises a driving wheel (41) and guide wheels (42) on both sides of the driving wheel (41) for guiding the chain (6).

6. The adjustable double-layer propulsion beam according to claim 1, characterized in that: Anti-collision buffer blocks (12) are provided at both ends of the first propulsion beam (1) along the sliding direction of the power head mounting seat (3).

7. The adjustable double-layer propulsion beam according to claim 1, characterized in that: The power head mounting seat (3) is bolted to a first wear-resistant plate (32) which is slidably engaged with the edge of the first propulsion beam (1).

8. The adjustable double-layer propulsion beam according to claim 1, characterized in that: The first propulsion beam (1) is bolted to a second wear-resistant plate (13) which is slidably engaged with the edge of the second propulsion beam (2).

9. The adjustable double-layer propulsion beam according to claim 1, characterized in that: The end of the second propulsion beam (2) is provided with a supporting drill structure (8) for limiting the linear sliding of the first propulsion beam (1).

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