Column type telescopic mechanism for cantilever type heading machine

Abstract

The utility model relates to the technical field of heading machines, in particular to a column type telescopic mechanism for a cantilever type heading machine, which comprises a sliding component, the sliding component comprises a guide column, a sliding frame, a first telescopic power piece and a rotary table, the sliding frame is rotatably mounted on the guide column, the guide column is used for being mounted on the heading machine, and the rotary table is used for being mounted on the sliding frame. The first end of the first telescopic power part is used for being connected to the heading machine, the second end of the first telescopic power part is connected to the sliding frame, and the rotary table is installed on the sliding frame in a sliding mode; and the lifting assembly comprises an arm frame, a lifting power piece and a cutting head. The utility model solves the technical problem that the cutting telescopic mechanism of the cantilever heading machine can influence the stability of the connection between the telescopic device and the main body.

Description

Technical Field

[0001] This utility model relates to the field of tunneling machine technology, and specifically to a column telescopic mechanism for cantilever tunneling machines. Background Technology

[0002] Tunnel boring machines (TBMs) are widely used in tunneling operations in coal mine roadways and mountain tunnels. They mainly consist of a cutting mechanism, a traveling mechanism, and a transfer mechanism. During the mining and loading process, TBMs need to frequently move forward and backward, which severely reduces their mining efficiency and shortens the service life of the chassis. To avoid these problems, a telescopic device is usually designed into the cutting mechanism of the TBM, thereby greatly improving the efficiency of roadway excavation.

[0003] There are two main methods for telescopic cutting in existing cantilever tunneling machines: one is to install a telescopic mechanism on the cantilever section between the cutting reducer and the cutting head; the other is to connect the cutting motor, reducer, and cutting head into a single unit, with a telescopic mechanism between this unit and the cutting boom structure. When the telescopic device is installed in the cutting section or motor housing, the movement of the cutting head, cutting arm, cutting reducer, and cutting motor as a whole is driven by a telescopic cylinder. This layout tends to result in a complex cutting boom structure, increasing the difficulty of maintenance and inspection. Furthermore, in semi-coal and rock conditions, the cutting section experiences severe vibrations, which can affect the stability of the connection between the telescopic device and the main body, thus impacting the service life of the telescopic mechanism. Additionally, the limited telescopic range of these mechanisms also restricts the tunneling machine's mining efficiency, thereby affecting the construction period and progress. Utility Model Content

[0004] The purpose of this utility model is to provide a column-type telescopic mechanism for cantilever tunneling machines, so as to solve the technical problem that the existing cutting telescopic mechanism of cantilever tunneling machines affects the stability of the connection between the telescopic device and the main body. The specific technical solution is as follows:

[0005] This utility model provides a column-type telescopic mechanism for a cantilever tunneling machine, comprising:

[0006] A sliding assembly includes a guide column, a sliding frame, a first telescopic power member, and a rotary table. The sliding frame is slidably mounted on the guide column, which is used to mount on a tunneling machine. A first end of the first telescopic power member is used to connect to the tunneling machine, and a second end of the first telescopic power member is connected to the sliding frame. The rotary table is rotatably mounted on the sliding frame.

[0007] The lifting assembly includes a boom and a lifting power unit. A first end of the boom is hinged to the rotary table, and a second end of the boom is used to connect to a cutting head. The lifting power unit is connected between the rotary table and the boom.

[0008] A further improvement of the column telescopic mechanism of this utility model for cantilever tunneling machines is that the sliding frame is provided with a mounting base, and a second telescopic power component is connected between the mounting base and the rotary table.

[0009] A further improvement of this utility model for the column telescopic mechanism of a cantilever tunneling machine is that the number of the second telescopic power components is two, and the two second telescopic power components are hinged to both sides of the rotary table.

[0010] A further improvement of this utility model for the column telescopic mechanism of a cantilever tunneling machine is that the number of guide columns is at least two, and the at least two guide columns are spaced apart.

[0011] A further improvement of the column telescopic mechanism of this utility model for cantilever tunneling machines is that the sliding frame is provided with a guide cylinder sleeved on the guide column, and a sealing component is provided between the guide cylinder and the guide column.

[0012] A further improvement of the present invention for the column telescopic mechanism of a cantilever tunneling machine is that the sealing assembly includes a bushing, a dust ring and an end cap. The bushing is sleeved between the guide cylinder and the guide column, the end cap is detachably fixed to the end of the guide cylinder, and the dust ring is sleeved between the guide column and the end cap.

[0013] A further improvement of the present invention for the column telescopic mechanism of a cantilever tunneling machine is that the sealing assembly further includes a first sealing ring, the bushing has an outward flange formed at one end near the end cover, the first sealing ring is engaged between the flange and the guide cylinder, and the end cover has a notch for accommodating the flange.

[0014] A further improvement of the present invention for the column telescopic mechanism of a cantilever tunneling machine is that the sealing assembly further includes a shaped sleeve, which is fitted between the guide column and the end cap and located on the side of the dustproof ring away from the bushing. The end cap is provided with a groove for accommodating the shaped sleeve.

[0015] A further improvement of the present invention for the column telescopic mechanism of a cantilever tunneling machine is that the sealing assembly further includes a second sealing ring, which is sleeved between the irregular sleeve and the bottom of the groove.

[0016] A further improvement of the present invention for the column telescopic mechanism of a cantilever tunneling machine is that the boom is equipped with a cutting motor and a cutting reducer, and the cutting reducer is connected between the cutting motor and the cutting head.

[0017] The application of the technical solution of this utility model has the following beneficial effects:

[0018] This invention relates to a column-type telescopic mechanism for cantilever tunneling machines. By connecting the guide cylinder of the sliding frame with the guide column, a large contact area and uniform force distribution are achieved during sliding, allowing it to withstand significant impact and vibration loads. This results in excellent cutting stability for the entire machine and solves the problem of high failure rates in previous telescopic mechanisms used in rock tunnels. It also addresses the technical issue of existing telescopic mechanisms affecting the stability of the connection between the telescopic device and the main body. This invention allows the tunneling machine to move the cutting arm forward and backward according to work requirements, eliminating the need for frequent operation of the traveling mechanism for mining and material collection. This reduces track slippage or damage in coal mine tunnels, improving work efficiency. The telescopic mechanism, combined with a double-guide-column sliding method, enables the telescopic extension of the cutting arm of the cantilever tunneling machine, with an extension range of 0-1200mm. It features a large extension stroke, simple structure, high mechanical strength, and reliable operation, effectively improving the cutting range and mining efficiency of the cantilever tunneling machine.

[0019] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of the column telescopic mechanism of this utility model for a cantilever tunneling machine;

[0022] Figure 2 This is a side view of the column telescopic mechanism of the present invention used in a cantilever tunneling machine;

[0023] Figure 3 This is a top view of the column telescopic mechanism of the present invention used in a cantilever tunneling machine;

[0024] Figure 4 This is a schematic diagram of the end face structure of the guide column and guide cylinder connection in the column telescopic mechanism of the cantilever tunneling machine of this utility model;

[0025] Figure 5 This is a side view of the connection between the guide column and the guide cylinder in the column-type telescopic mechanism of the present invention for a cantilever tunneling machine;

[0026] Figure 6 This is a longitudinal sectional view of the sealing assembly of the column telescopic mechanism of the present invention used in a cantilever tunneling machine.

[0027] Among them, 10-cutting head, 20-cutting reducer, 30-cutting motor, 40-arm, 50-lifting power component, 60-turntable, 70-slewing support, 80-second telescopic power component, 90-sliding frame, 901-guide cylinder, 100-guide column, 110-guide column pressure seat, 120-first telescopic power component, 130-sealing assembly, 1301-shaft sleeve, 1302-first sealing ring, 1303-second sealing ring, 1304-dustproof ring, 1305-irregular sleeve, 1306-end cap, 1307-screw. Detailed Implementation

[0028] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0029] See Figures 1-6 As shown, a column-type telescopic mechanism for a cantilever tunneling machine includes:

[0030] A sliding assembly includes a guide column 100, a sliding frame 90, a first telescopic power member 120, and a rotary table 60. The sliding frame 90 is slidably mounted on the guide column 100, and the guide column 100 is used to be mounted on a tunneling machine. The first end of the first telescopic power member 120 is used to be connected to the tunneling machine, and the second end of the first telescopic power member 120 is connected to the sliding frame 90. The rotary table 60 is rotatably mounted on the sliding frame 90.

[0031] The lifting assembly includes a boom 40 and a lifting power component 50. The first end of the boom 40 is hinged to the rotary table 60, and the second end of the boom 40 is used to connect to the cutting head 10. The lifting power component 50 is connected between the rotary table 60 and the boom 40.

[0032] Specifically, such as Figure 1 As shown, the rotary table 60 is mounted on the sliding frame 90 via the rotary support 70. The lifting power component 50 can be a hydraulic cylinder. The rotary table 60 is hinged to the boom 40, the piston rod end of the lifting power component is hinged to the boom 40, and the cylinder end of the lifting power component is hinged to the rotary table 60. The extension and retraction of the cutting boom of the cantilever tunneling machine is achieved through the sliding frame 90 and the double guide columns 100, which is beneficial for the precise excavation and shaping of the roadway or tunnel cross-section. It also has the advantages of large extension stroke, simple structure, high mechanical strength, and reliable operation, effectively improving the cutting range and mining efficiency of the cantilever tunneling machine. The extension and retraction of the guide cylinder 901 and the double guide columns 100 has a large contact area and uniform force during sliding, so it can withstand large impact and vibration loads, and the entire equipment has good cutting stability.

[0033] Preferably, the sliding frame 90 is provided with a mounting base, and a second telescopic power component 80 is connected between the mounting base and the rotary table 60. Specifically, the mounting base is located at the end of the sliding frame 90 away from the cutting head 10, and the second telescopic power component 80 can be a hydraulic cylinder.

[0034] Preferably, there are two second telescopic power members 80, which are hinged to both sides of the rotary table 60. In this embodiment, there are two second telescopic members, which are hinged to both sides of the rotary table 60 to make the movement of the rotary table 60 more stable. The rotary table 60 can slide on the sliding frame 90 by extending and retracting the second telescopic members.

[0035] Preferably, there are at least two guide columns 100, and the at least two guide columns 100 are spaced apart. The first telescopic power component 120 can be a hydraulic cylinder. The tunneling machine is equipped with a chassis for mounting the guide columns 100. The two ends of the guide columns 100 are fixed to the chassis by several sets of bolts through guide column pressure seats 120. The piston rod end of the first telescopic power component 120 is connected to the sliding frame 90 by a pin, and the cylinder end of the first telescopic power component 120 is fixed to the chassis by a pin. Through the telescopic movement of the first telescopic power component 120, the sliding frame 90 slides on the guide columns 100, thereby realizing the overall front-to-back telescopic movement of the cutting section.

[0036] Preferred, such as Figures 4-6 As shown, the sliding frame 90 is provided with a guide cylinder 901 sleeved on the guide post 100, and a sealing assembly 130 is provided between the guide cylinder 901 and the guide post 100 to prevent dust particles and other impurities from entering the internal space.

[0037] Preferably, the sealing assembly 130 includes a bushing 1301, a dust ring 1304, and an end cap 1306. The bushing 1301 is sleeved between the guide cylinder 901 and the guide post 100. The end cap 1306 is detachably fixed to the end of the guide cylinder 901, and the dust ring 1304 is sleeved between the guide post 100 and the end cap 1306. Specifically, the end cap 1306 includes two opposing semi-circular caps, which are fixed together in a circular shape by screws 1307 and fixed to the end face of the guide cylinder 901 by screws 1307. The guide cylinder 901 has a lubrication channel for injecting solid grease between the guide cylinder 901 and the guide post 100 during forward and backward sliding. During operation, the closed cavity formed by the sealing device between the guide cylinder 901 and the guide post 100 is filled with grease to reduce friction and wear during sliding.

[0038] Preferably, the sealing assembly 130 further includes a first sealing ring 1302. The bushing 1301 has an outwardly formed flange at one end near the end cap 1306. The first sealing ring 1302 is engaged between the flange and the guide cylinder 901. The end cap 1306 has a notch for accommodating the flange. When the end cap 1306 is tightened, the bushing 1301 presses the first sealing ring 1302 against the side wall of the guide cylinder 901, serving as the first seal.

[0039] Preferably, the sealing assembly 130 further includes a shaped sleeve 1305, which is fitted between the guide post 100 and the end cap 1306, and located on the side of the dustproof ring 1304 away from the bushing 1301. The end cap 1306 has a groove for accommodating the shaped sleeve 1305. The shaped sleeve 1305 has a conical surface design, which can catch foreign objects on the guide post 100 during front and rear groove cleaning, thus playing a cleaning role.

[0040] Preferably, the sealing assembly 130 further includes a second sealing ring 1303, which is fitted between the shaped sleeve 1305 and the bottom of the groove. The second sealing ring 1303 is pressed against the shaped sleeve 1305 in the vertical direction by the groove surface of the end cap 1306, serving as a second seal. This structure of two staggered seals, combined with the elastic and malleable dustproof ring 1304, effectively prevents external dust, particles, and other impurities from entering the internal space, thereby significantly improving the sealing effect.

[0041] Preferred, such as Figure 1 and Figure 3 As shown, the boom 40 is equipped with a cutting motor 30 and a cutting reducer 20, with the cutting reducer 20 connected between the cutting motor 30 and the cutting head 10. The cutting motor 30 is mounted inside the boom 40 by several fasteners. The cutting head 10 is fixed to the front section of the boom 40 and is connected to the boom 40 via a coupling. Through the extension and retraction of the lifting power component and the second telescopic power component 80, the cutting head 10 can perform large-amplitude vertical and horizontal swing cutting movements.

[0042] This utility model relates to a column-type telescopic mechanism for cantilever tunneling machines. By connecting the guide cylinder 901 of the sliding frame 90 with the guide column 100, the large contact area and uniform force distribution during sliding allow it to withstand significant impact and vibration loads, resulting in good cutting stability for the entire machine. This solves the problem of high failure rates in previous telescopic mechanisms for cantilever tunneling machines used in rock tunnels, and also addresses the technical issue of existing telescopic mechanisms affecting the stability of the connection between the telescopic device and the main body. This utility model allows the tunneling machine to move the cutting arm forward and backward according to work requirements, eliminating the need for frequent operation of the traveling mechanism for mining and material collection. This reduces track slippage or damage in coal mine tunnels, improving work efficiency. The telescopic mechanism with double guide columns 100 enables the telescopic extension of the cutting arm of the cantilever tunneling machine, with an extension range of 0-1200mm. It features a large extension stroke, simple structure, high mechanical strength, and reliable operation, effectively improving the cutting range and mining efficiency of the cantilever tunneling machine.

[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A column-type telescopic mechanism for a cantilever tunneling machine, characterized in that, include: A sliding assembly, comprising a guide column (100), a sliding frame (90), a first telescopic power member (120), and a rotary table (60), wherein the sliding frame (90) is slidably mounted on the guide column (100), the guide column (100) is used to be mounted on a tunneling machine, the first end of the first telescopic power member (120) is used to be connected to the tunneling machine, the second end of the first telescopic power member (120) is connected to the sliding frame (90), and the rotary table (60) is rotatably mounted on the sliding frame (90); The lifting assembly includes a boom (40) and a lifting power component (50). The first end of the boom (40) is hinged to the rotary table (60), and the second end of the boom (40) is used to connect to the cutting head (10). The lifting power component (50) is connected between the rotary table (60) and the boom (40). The sliding frame (90) is provided with a guide cylinder (901) sleeved on the guide post (100), and a sealing assembly (130) is provided between the guide cylinder (901) and the guide post (100); The sealing assembly (130) includes a bushing (1301), a dust ring (1304), and an end cap (1306). The bushing (1301) is sleeved between the guide cylinder (901) and the guide post (100). The end cap (1306) is detachably fixed to the end of the guide cylinder (901). The dust ring (1304) is sleeved between the guide post (100) and the end cap (1306).

2. The column-type telescopic mechanism for a cantilever tunneling machine according to claim 1, characterized in that, The sliding frame (90) is provided with a mounting base, and a second telescopic power component (80) is connected between the mounting base and the rotary table (60).

3. The column-type telescopic mechanism for a cantilever tunneling machine according to claim 2, characterized in that, The number of the second telescopic power members (80) is two, and the two second telescopic power members (80) are hinged to both sides of the rotary table (60).

4. The column-type telescopic mechanism for a cantilever tunneling machine according to claim 1, characterized in that, The number of guide posts (100) is at least two, and the at least two guide posts (100) are spaced apart.

5. The column-type telescopic mechanism for a cantilever tunneling machine according to claim 1, characterized in that, The sealing assembly (130) further includes a first sealing ring (1302). The bushing (1301) has a flange formed outward at one end near the end cap (1306). The first sealing ring (1302) is engaged between the flange and the guide cylinder (901). The end cap (1306) has a notch for receiving the flange.

6. The column-type telescopic mechanism for a cantilever tunneling machine according to claim 1, characterized in that, The sealing assembly (130) further includes a shaped sleeve (1305), which is sleeved between the guide post (100) and the end cap (1306) and located on the side of the dust ring (1304) away from the bushing (1301). The end cap (1306) is provided with a groove for receiving the shaped sleeve (1305).

7. The column-type telescopic mechanism for a cantilever tunneling machine according to claim 6, characterized in that, The sealing assembly (130) further includes a second sealing ring (1303), which is sleeved between the irregular sleeve (1305) and the bottom of the groove.

8. The column-type telescopic mechanism for a cantilever tunneling machine according to claim 1, characterized in that, The boom (40) is equipped with a cutting motor (30) and a cutting reducer (20), and the cutting reducer (20) is connected between the cutting motor (30) and the cutting head (10).

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