A hydraulic traction device of a large-slope tunneling machine

Abstract

This utility model discloses a hydraulic traction device for a tunneling machine with a large slope. The hydraulic traction device includes a lug, on which a first connecting lug is rotatably connected. The first connecting lug is rotatably connected to a hydraulic cylinder. The piston rod of the hydraulic cylinder is rotatably connected to one end of a towing chain, and the other end of the towing chain is rotatably connected to a towing base. The hydraulic traction device in this utility model is located on the left and right sides of the rear support of the tunneling machine. When the tunneling machine is working on a steep uphill slope, it is tractioned by the hydraulic traction device, preventing the machine body from sliding down and enhancing the stability of the tunneling machine. Furthermore, when the tunneling machine is reversing, the traction of the hydraulic traction device reduces the risk of slippage and improves the overall reversing rate of the machine body.

Description

Technical Field

[0001] This utility model belongs to the field of tunneling machines, specifically relating to a hydraulic traction device for a tunneling machine with a large gradient. Background Technology

[0002] Tunnel boring machines (TBMs) for steep-slope roadway excavation in coal mines are specialized equipment suitable for tunneling downhill roadways with large slopes. They reduce the risks associated with blasting operations, effectively improve work efficiency, and minimize coal waste. However, existing TBMs of this type suffer from the following problems during operation due to the large tunnel excavation angle:

[0003] 1. The machine body is prone to slippage. This not only affects the working posture of the tunneling machine, causing the machine body to deviate, thus affecting tunneling efficiency and reducing the safety factor of the working face, but also increases the workload on the traveling mechanism. At the same time, it also affects the tunneling operation, increasing the stress on the tunneling machine's cutting head and causing frequent damage to the cutting part.

[0004] 2. When the tunneling machine is moving backward on a steep uphill slope, the overall center of gravity of the machine shifts forward, and the track plates in its traveling mechanism will reduce the coefficient of friction with the ground, which will cause slippage and make it difficult for the machine to move backward. Utility Model Content

[0005] The purpose of this utility model is to solve the above-mentioned problems by providing a hydraulic traction device for a tunneling machine with a large slope. The hydraulic traction device is set on the left and right sides of the rear support of the tunneling machine. When the tunneling machine is working on a steep slope, it will not slide down due to the traction of the hydraulic traction device, thus enhancing the stability of the tunneling machine. Furthermore, when the tunneling machine is reversing, the traction of the hydraulic traction device will also reduce the risk of slippage and improve the overall reversing rate of the machine.

[0006] To achieve the above objectives, this utility model provides a hydraulic traction device for a steep slope tunneling machine. The hydraulic traction device includes a lug, on which a first connecting lug is rotatably connected. The first connecting lug is rotatably connected to a hydraulic cylinder. The piston rod of the hydraulic cylinder is rotatably connected to one end of a drag chain, and the other end of the drag chain is rotatably connected to a drag base.

[0007] As a further optimization, the hydraulic traction device is connected to opposite sides of the rear support of the tunneling machine via lugs.

[0008] As a further optimization, the cylinder barrel of the hydraulic cylinder is provided with a lifting ring seat, which is connected to one end of a ring chain, and the other end of the ring chain is connected to a support on the rear support.

[0009] As a further optimization, the ear seat is welded together from an outer plate, a reinforcing plate, a first connecting ear, triangular ribs, and a connecting plate. The outer plates of the ear seat are welded to opposite sides of the frame of the rear support. The outer plates of the ear seat are welded to the frame through reinforcing plates to enhance the overall connection strength of the ear seat. The outer plates of the ear seat have two parallel insertion interfaces. After the first connecting ear is inserted into the insertion interface, it is fixedly connected to the outer plate of the ear seat. Multiple triangular ribs are welded between the two first connecting ears and the outer plates of the ear seat. A connecting plate is welded to the side of the two first connecting ears away from the hydraulic cylinder. The two first connecting ears have a first connecting hole at their relative positions. The first connecting ear is connected to a longitudinally arranged first pin through the first connecting hole. The ear seat is rotatably connected to a universal connecting ear seat through the first pin.

[0010] As a further optimization, the first connecting ear includes an ear body with a second connecting hole. The left and right sides of one end of the ear body have outwardly extending second connecting ears. The relative positions of the two second connecting ears have a third connecting hole. The second connecting ears are connected to a horizontally arranged second pin through the third connecting hole. The first connecting ear is rotatably connected to a hydraulic cylinder through the second pin.

[0011] As a further optimization, one end of the drag chain is provided with a first hinged chain link, which can rotate up and down around the piston rod via a third pin. The other end of the drag chain is provided with a second hinged chain link, which is rotatably connected to a second connecting ear seat via a horizontally arranged fourth pin. The two third connecting ears of the second connecting ear seat are rotatably connected to the drag base via a vertically arranged fifth pin.

[0012] As a further optimization, the drag base includes a chain connecting plate that is rotatably connected to the drag chain. Fixing plates are fixedly connected to opposite sides of the chain connecting plate, and the fixing plates on both sides are fixedly connected to the base plate. The base plate is provided with multiple fixing holes.

[0013] Advantages and beneficial effects of this utility model

[0014] 1. This utility model adds a set of hydraulic traction devices on each of the left and right sides of the rear support of the tunneling machine to traction the machine body. This prevents the tunneling machine from sliding downhill at steep inclines, which could affect its working posture and cause the machine body to deviate. This improves tunneling efficiency, the safety factor of the working face, and enhances the stability of the tunneling machine. By tractioning the machine body through the hydraulic traction devices on both sides, the overall weight of the machine body is shifted backward, reducing the friction required between the track plates and the ground in the traveling mechanism. This reduces the workload of the traveling mechanism and also reduces the stress on the front cutting head, lowering the frequency of damage to the cutting section.

[0015] 2. Under steep uphill conditions, this utility model utilizes the traction force of hydraulic cylinders to assist the traveling mechanism of the tunneling machine in moving backward, thereby effectively reducing the tendency of the machine body weight to move forward and improving the stability of the backward movement. This assists in the backward movement of the machine body and reduces slippage, thereby increasing the overall backward movement rate of the machine body. When the machine body slips and deviates, the deviation angle of the machine body can also be adjusted by the hydraulic traction devices on both sides.

[0016] 3. The hydraulic cylinder in this invention not only has the aforementioned mitigation effect, but also a telescopic function. The extension and retraction stroke of the hydraulic cylinder can be controlled by the hydraulic oil in the hydraulic system according to the actual needs of the tunneling machine during operation, thus compensating for the short travel distances of the tunneling machine. Therefore, the frequency of changing the position of the drag base can be reduced, improving work efficiency.

[0017] 4. This utility model has a ring chain on the outer side of the left and right support seats of the machine body. When the machine body needs to be pulled, the ring chain is separated from the hydraulic cylinder, so that the hydraulic traction device can pull the entire machine body and prevent slippage and sliding under steep slope conditions. When the machine body does not need to be pulled, the ring chain is connected to the hydraulic cylinder to prevent the hydraulic cylinder from sagging and dragging on the ground. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is an axonometric view of the overall structure provided in this embodiment of the utility model;

[0020] Figure 2 This is a top view of the overall structure provided in this embodiment of the utility model;

[0021] Figure 3 This is a side view of the overall structure provided in this embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of the rear support part of the tunneling machine in an embodiment of this utility model;

[0023] Figure 5 This is an enlarged view of the ear seat structure provided in this embodiment of the utility model;

[0024] Figure 6 This is a utility model Figure 5 A schematic diagram of the middle ear connector after removing the upper connecting ear and connecting plate;

[0025] Figure 7 This is an enlarged view of the ear seat provided in this embodiment of the utility model from another angle;

[0026] Figure 8 This is an isometric view of the left and right sides of the rear support of the tunneling machine.

[0027] Reference numerals: 1. Hydraulic traction device; 2. Ear seat; 21. Ear seat outer plate; 21. Insertion interface; 22. Reinforcing plate; 23. First connecting ear; 24. Triangular rib; 25. Connecting plate; 3. First connecting ear seat; 31. Ear seat body; 32. Second connecting ear; 4. Hydraulic cylinder; 41. Piston rod; 42. Lifting ring seat; 5. Driving chain; 51. First hinged chain link; 52. Second hinged link; 53. Second connecting ear seat; 6. Driving base; 61. Chain connection; 62. Fixing; 63. Base plate; 64. Fixing hole; 7. Rear support; 71. Frame; 72. Support; 8. Ring chain; 9. First pin; 10. Second pin; 11. Third pin; 12. Fourth pin; 13. Fifth pin; 14. Tunneling machine; 15. Traveling mechanism. Detailed Implementation

[0028] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein.

[0029] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be noted that in the description of this utility model, the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] like Figure 8 As shown, a hydraulic traction device 1 for a steep gradient tunneling machine is installed on both sides of the rear support 7 at the rear end of the tunneling machine 14. The advantages of this design are:

[0031] 1. When the entire machine is pulled by the hydraulic traction device 1, the pulling force is concentrated at the rear of the machine. Given that the tunneling machine operates in a downward mining state, the overall center of gravity of the machine is at the front, which will cause the entire machine to tilt forward. This arrangement of the hydraulic traction device 1 can compensate for the problem of the excessive forward tilt of the machine's point of force, and improve the machine's anti-slip performance and stability on the ground.

[0032] 2. The hydraulic traction device 1 is installed at the rear of the entire unit. When the machine body deviates, the angle of deviation can be adjusted more conveniently and quickly. Since the drag point of the hydraulic traction device 1 is located at the rear of the machine body, which is far from the front, the swing angle of the front of the machine body will be more obvious when the machine body angle is adjusted by the hydraulic cylinder 4. This facilitates the adjustment of the machine body's attitude.

[0033] 3. The hydraulic traction device 1 is installed on both sides of the rear of the machine, rather than on both sides of the middle of the machine. The reason is that when the width of the tunnel is limited, the hydraulic traction device 1 can be as close to the machine body as possible, reducing the width, and will not interfere with or collide with the traveling mechanism 15. This reduces the failure rate during operation.

[0034] The specific structure of the hydraulic traction device 1 will be described in detail below.

[0035] See Figures 1-3 The hydraulic traction device 1 includes an ear seat 2 fixedly connected to the rear support part 7. A first connecting ear seat 3 is rotatably connected to the ear seat 2. The first connecting ear seat 3 can rotate left and right relative to the ear seat 2. The first connecting ear seat 3 is rotatably connected to a hydraulic cylinder 4. The hydraulic cylinder 4 can rotate up and down relative to the first connecting ear seat 3. The piston rod 41 of the hydraulic cylinder 4 is rotatably connected to one end of the drag chain 5. The drag chain 5 can rotate up and down relative to the piston rod 41. The other end of the drag chain 5 is rotatably connected to the drag base 6. The drag chain 5 can be adjusted up, down, left, and right relative to the drag base 6. The drag base 6 is fixed by a tie rod drilled into the ground. When the hydraulic traction device 1 is stretched, multi-directional compensation can be achieved through the four-directional adjustment between the hydraulic cylinder 4 and the rear support part 7 and the four-directional adjustment between the drag chain 5 and the drag base 6.

[0036] When the tunneling machine 14 operates at a large angle, its body is pulled by the towing chain 5 and the towing base 6, preventing the tunneling machine 14 from slipping and affecting its working posture, thus improving tunneling efficiency, the safety factor of the working face, and enhancing the stability of the tunneling machine. This also reduces the workload of the traveling mechanism and lowers the frequency of damage to the cutting section.

[0037] This application includes a four-way adjustable hydraulic cylinder 4 between the rear support 7 and the towing chain 5. On one hand, the traction force of the hydraulic cylinder 4 assists in the backward movement of the traveling mechanism 15 in the tunneling machine 14, effectively mitigating the tendency of the machine's weight to shift forward, improving the stability of the backward movement, assisting in the machine's backward movement, reducing slippage, and increasing the overall backward movement rate of the machine. On the other hand, when the machine slips and deviates, the offset angle can be adjusted by the hydraulic traction devices 1 on both sides. Simultaneously, the extension and retraction stroke of the hydraulic cylinder can compensate for short travel distances of the tunneling machine 14. Therefore, the frequency of changing the position of the towing base 6 can be reduced, improving work efficiency.

[0038] As a further optimization, such as Figure 2 As shown, the cylinder of the hydraulic cylinder 4 is provided with a lifting ring seat 42. The lifting ring seat 42 is connected to one end of the ring chain 8, and the other end of the ring chain 8 is connected to the support seat 72 on the rear support part 7. When it is necessary to traction the machine body, the ring chain 8 is separated from the lifting ring seat 42, so that the hydraulic traction device 1 can traction the entire machine body and prevent slippage and sliding under steep slope conditions. When it is not necessary to traction the machine body, the ring chain 8 is connected to the lifting ring seat 42 to prevent the hydraulic cylinder 4 from drooping and dragging on the ground.

[0039] As a further optimization, such as Figures 5-7 As shown, the ear seat 2 is welded together from an outer plate 21, a reinforcing plate 22, two first connecting ears 23, triangular ribs 24, and a connecting plate 25. The frame 71 of the rear support 7 has an outer plate 21 welded to each of its left and right sides. To enhance the connection strength between the ear seat 2 and the frame 71, a reinforcing plate 22 is welded between the outer plate 21 and the frame 71 in this embodiment. The outer plate 21 has two parallel insertion interfaces 211. The first connecting ears 23 are inserted into the insertion interfaces 211 and then welded to the outer plate 21. To further increase the strength of the first connecting ears 23, multiple triangular ribs 24 are welded between the first connecting ears 23 and the outer plate 21. A connecting plate 25 is welded to the side of the two first connecting ears 23 away from the hydraulic cylinder 4. The two first connecting ears 23 have first connecting holes at their relative positions. The first connecting ears 23 are connected to a longitudinally arranged first pin 9 through the first connecting holes. The universal connecting ear seat 3 can rotate left and right relative to the ear seat 2 through the first pin 9.

[0040] As a further optimization, the first connecting ear 3 includes an ear body 31, which has a second connecting hole. The pin 9 is inserted into the second connecting hole to connect the first connecting ear 3 with the ear 2. The left and right sides of one end of the ear body 31 have outwardly extending second connecting ears 32. The relative positions of the two second connecting ears 32 have a third connecting hole. The second connecting ears 32 are connected to the horizontally arranged second pin 10 through the third connecting hole. The hydraulic cylinder 4 can rotate up and down relative to the first connecting ear 3 through the second pin 10.

[0041] like Figure 1 As shown, the front end of the drag chain 5 is provided with a first hinged chain link 51, which can rotate up and down around the piston rod 41 via a third pin 11. The lower end of the drag chain 5 is provided with a second hinged chain link 52, which is rotatably connected to a second connecting lug 53 via a horizontally arranged fourth pin 12. The two third connecting lugs of the second connecting lug 53 are rotatably connected to the drag base 6 via a vertically arranged fifth pin 13. The drag chain 5 can rotate up and down relative to the drag base 6 via the fourth pin 12, and can rotate left and right relative to the drag base 6 via the fifth pin 13.

[0042] like Figure 1 As shown, the drag base 6 includes a chain connecting plate 61 rotatably connected to the second connecting lug 53. Fixing plates 62 are fixedly connected to opposite sides of the chain connecting plate 61. The top of the fixing plate 62 has a certain angle relative to the bottom plate 63, so that the drag chain 5 also has a certain angle when connected to the drag base 6. The bottom of the fixing plates 62 on both sides is fixedly connected to the bottom plate 63. The bottom plate 63 has four fixing holes 64 around its perimeter. The pull rod drilled and buried in the ground passes through the fixing holes 64 and is connected to the bottom plate 63.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit them. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the present utility model.

Claims

1. A hydraulic traction device (1) of a steep-inclined excavator, characterized in that: The hydraulic traction device (1) includes an ear seat (2), on which a first connecting ear seat (3) is rotatably connected. The first connecting ear seat (3) is rotatably connected to a hydraulic cylinder (4). The piston rod (41) of the hydraulic cylinder (4) is rotatably connected to one end of a drag chain (5), and the other end of the drag chain (5) is rotatably connected to a drag base (6).

2. A hydraulic traction device (1) of a steep-inclined excavator according to claim 1, characterized in that: The hydraulic traction device (1) is connected to the opposite sides of the rear support part (7) of the tunneling machine via the lugs (2).

3. A hydraulic traction device (1) of a steep-inclined excavator according to claim 2, characterized in that: The hydraulic cylinder (4) has a lifting ring seat (42) on its cylinder barrel. The lifting ring seat (42) is connected to one end of the ring chain (8), and the other end of the ring chain (8) is connected to the support (72) on the rear support (7).

4. The hydraulic traction device (1) of a steep-inclined tunneling machine according to claim 2, characterized in that: The ear seat (2) is welded together from an outer plate (21), a reinforcing plate (22), a first connecting ear (23), a triangular rib (24), and a connecting plate (25). The frame (71) of the rear support (7) has outer plates (21) welded to opposite sides. The outer plate (21) is welded to the frame (71) via the reinforcing plate (22) to enhance the overall connection strength of the ear seat (2). The outer plate (21) has two parallel insertion interfaces (211). The first connecting ear (23) is inserted into the insertion interface. (211) is then fixedly connected to the outer plate (21) of the ear seat. Multiple triangular ribs (24) are welded between the two first connecting ears (23) and the outer plate (21) of the ear seat. A connecting plate (25) is welded to the side of the two first connecting ears (23) away from the hydraulic cylinder (4). The relative positions of the two first connecting ears (23) have first connecting holes. The first connecting ears (23) are connected to the first pin (9) arranged longitudinally through the first connecting holes. The ear seat (2) is rotatably connected to the universal connecting ear seat (3) through the first pin (9).

5. The hydraulic traction device (1) of a steep-inclined tunneling machine according to claim 1, characterized in that: The first connecting ear seat (3) includes an ear seat body (31), the ear seat body (31) has a second connecting hole, and the left and right sides of one end of the ear seat body (31) have outwardly extending second connecting ears (32). The relative positions of the two second connecting ears (32) have a third connecting hole. The second connecting ears (32) are connected to the horizontally arranged second pin (10) through the third connecting hole. The first connecting ear seat (3) is rotatably connected to the hydraulic cylinder (4) through the second pin (10).

6. The hydraulic traction device (1) of a steep-inclined tunneling machine according to claim 1, characterized in that: One end of the drag chain (5) is provided with a first hinge chain link (51), which can rotate up and down around the piston rod (41) via a third pin (11). The other end of the drag chain (5) is provided with a second hinge chain link (52), which is rotatably connected to a second connecting ear seat (53) via a fourth pin (12) arranged laterally. The two third connecting ears of the second connecting ear seat (53) are rotatably connected to the drag base (6) via a fifth pin (13) arranged longitudinally.

7. The hydraulic traction device (1) of a steep-inclined tunneling machine according to claim 1, characterized in that: The drag base (6) includes a chain connecting plate (61) rotatably connected to the drag chain (5). Fixing plates (62) are fixedly connected to opposite sides of the chain connecting plate (61). The fixing plates (62) on both sides are fixedly connected to the base plate (63). The base plate (63) is provided with a plurality of fixing holes (64).

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