Tunnel construction trolley running drive

Abstract

The utility model relates to a tunnel construction trolley walking drive arrangement, the bottom longitudinal beam bottom surface of trolley is fixed with the rack along the horizontal direction arrangement, the walking drive seat of movable along its front and back is connected on the rack, the bottom longitudinal beam bottom surface of trolley still is fixed with the guide rail along the horizontal direction arrangement with the rack, the walking drive seat includes: transmission part, drive part and support mechanism, and the support mechanism is used to bear the load of trolley. The gear and rack drive mechanism adopted in the utility model provides more optimal technical solution scheme for improving the automation level, construction quality, operation efficiency and safety of tunnel construction with its high rigidity, high stability, high efficiency, high bearing, high reliability, long life and other characteristics.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction trolley technology, specifically to a tunnel construction trolley travel drive device. Background Technology

[0002] In existing tunnel construction trolleys (such as lining trolleys, waterproofing membrane laying trolleys, and curing trolleys), sprocket and chain drive is a widely adopted technical solution. Its basic structure involves mounting a drive sprocket, driven by a motor or other drive components, on a movable base (movably connected to the trolley frame). A chain is laid on the trolley frame, and the trolley is pulled by the sprocket engaging the chain.

[0003] However, in the unique, harsh, and highly reliable engineering environment of tunnel construction, sprocket and chain drive mechanisms have the following significant drawbacks, which restrict construction efficiency, safety, and equipment lifespan. Among these, frequent chain breakage is a key issue leading to downtime, safety hazards, and soaring maintenance costs:

[0004] 1. Poor transmission stability, prone to "creeping," jumping, and impact: The inherent polygonal effect and multi-link articulation characteristics of the chain result in poor transmission smoothness, especially during low-speed heavy-load starts, stops, or reversals. The chain is prone to "creeping" (non-uniform motion) and violent jumping, causing the trolley to travel unevenly and affecting positioning accuracy. Worn and elongated chains mesh poorly with sprockets, easily generating large impact loads during sudden load changes or startup. Due to the structural defects of the chain's multi-link articulation, this often leads to chain breakage (especially in weak links like chain plates or pins) before reaching the pressure relief pressure of the vehicle's hydraulic system.

[0005] 2. High tension requirements, cumbersome maintenance, and high risk of tension failure: During operation, the chain will loosen due to wear and stretching, easily causing asynchronous movement on both sides of the trolley. Complex tensioning devices (such as spring tensioners and screw tensioning mechanisms) must be installed, and the tension must be frequently adjusted. Insufficient tension can lead to skipped teeth and chain derailment; excessive tension accelerates wear on the chain and sprockets and increases unnecessary frictional resistance. Maintaining chain tension in narrow, muddy tunnel environments is inconvenient and poses safety risks.

[0006] 3. The chain needs to go around the sprocket. The chain used in the tunnel construction trolley is thick and difficult to replace. In addition, the transmission efficiency is relatively low and the energy consumption is increased. To overcome the additional resistance caused by chain slack and polygonal effect, more drive power is required, resulting in energy waste. Summary of the Invention

[0007] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a driving device for the movement of tunnel construction trolleys.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] The tunnel construction trolley has a traveling drive device. The bottom of the trolley is equipped with traveling rollers and support legs that can be raised and lowered. A rack is fixed on the bottom surface of the bottom longitudinal beam of the trolley in a horizontal direction. A traveling drive seat that can move back and forth along the rack is connected to the rack.

[0010] The bottom longitudinal beam of the trolley is also fixed with a guide rail that is parallel to the rack in the horizontal direction.

[0011] The walking drive unit includes:

[0012] A transmission component is used to drive the travel drive seat to move back and forth along the longitudinal beam at the bottom of the trolley. The transmission component is provided with a drive gear corresponding to the rack, and the drive gear meshes with the rack.

[0013] A drive component, used to drive the rotation of the drive gear that is connected to its transmission;

[0014] The support mechanism is used to bear the load of the trolley. The support mechanism consists of a support frame and a load balancing assembly. The drive component is connected to the load balancing assembly on the support frame. The load balancing assembly includes a load balancing wheel and a hanging wheel. The load balancing wheel rolls with the guide rail, and the hanging wheel engages with the upper surface of the lower cover plate of the bottom longitudinal beam of the trolley.

[0015] Furthermore, the support frame includes a base and side plates, the side plates being fixed to both sides of the base respectively, and the drive component and the load balancing assembly being connected between the two side plates.

[0016] Furthermore, the support frame is provided with two sets of load balancing components located on both sides of it, and the drive gear is located between the two sets of load balancing components.

[0017] Furthermore, the support frame is provided with two pairs of load-bearing balance wheels spaced apart front and rear, and the two pairs of load-bearing balance wheels may have the same or different diameters.

[0018] Furthermore, the load-bearing balance wheel is provided with flanges on both sides, and the flanges on both sides are respectively limited to the two sides of the guide rail.

[0019] Furthermore, the side plate is composed of an inner plate and an outer plate, which are fixedly connected by bolts. The drive component and the load balance assembly are connected between the inner plates on both sides of the base. The outer plate is fixedly connected to the base. The height of the walking drive seat can be adjusted by adjusting the position of the mounting holes on the inner and outer plates.

[0020] Furthermore, the base of the support frame is rotatably connected to two opposite sides by pins, and the bottom of the support has two branch feet.

[0021] Furthermore, the driving component is a hydraulic motor.

[0022] This invention proposes using a gear and rack mechanism as the driving device for a tunnel construction trolley. This solution has the following significant advantages and is particularly well-suited to the needs of tunnel construction:

[0023] 1. High transmission rigidity and smoothness:

[0024] The gears and racks engage rigidly, eliminating the polygonal effect or slack problems associated with flexible components. Transmission is smooth, with no "creeping" phenomenon, enabling precise and uniform linear motion and ensuring accurate positioning of the construction trolley.

[0025] 2. High transmission efficiency, energy saving and consumption reduction:

[0026] The gear and rack mechanism has high transmission efficiency and requires less drive power under the same load and speed, thus reducing energy consumption.

[0027] 3. Excellent load-bearing capacity and reliability:

[0028] The gear rack has a compact structure, good contact stress distribution, and can withstand greater loads and impact loads. It has high strength and service life, and its overload resistance and fatigue fracture resistance are far superior to those of chains.

[0029] In summary, the gear and rack drive mechanism adopted in this utility model, with its characteristics of high rigidity, high stability, high efficiency, high load-bearing capacity, high reliability, and long service life, provides a better technical solution for improving the automation level, construction quality, work efficiency, and safety of tunnel construction. Attached Figure Description

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0031] Figure 1 This is a front view of the overall structure of this utility model;

[0032] Figure 2 A 3D view of the walking drive unit;

[0033] Figure 3 A bottom view of the drive unit;

[0034] Figure 4 This is a front view of the drive unit.

[0035] Figure 5 This is a side view of the drive unit.

[0036] Figure 6 A diagram illustrating the preparation of the trolley for starting to move;

[0037] Figure 7 A diagram showing the trolley after one stroke;

[0038] Figure 8 A schematic diagram showing the vehicle drive unit preparing to begin moving.

[0039] Figure 9 A schematic diagram showing the walking drive unit after it has moved one stroke. Detailed Implementation

[0040] like Figure 1-9 As shown, the tunnel construction trolley driving device of this utility model has a traveling roller 2 and a lifting support leg 3 at the bottom of the trolley 1 (driven by a hydraulic cylinder for lifting). In order to ensure the stability of the support, the support leg 3 on each side of the trolley 1 is generally designed to have more than two.

[0041] A rack 5 arranged in a horizontal direction is fixed on the bottom surface of the bottom longitudinal beam 101 of the trolley 1, and a travel drive seat 100 that can move back and forth along the rack 5 is connected to the rack 5.

[0042] The bottom surface of the bottom longitudinal beam 101 of the trolley 1 is also fixed with a guide rail 10 that is parallel to the rack 5 in the horizontal direction;

[0043] The drive unit 100 includes:

[0044] A transmission component is used to drive the travel drive seat 100 to move back and forth along the bottom longitudinal beam 101 of the trolley 1. The transmission component is provided with a drive gear 6 corresponding to the rack 5, and the drive gear 6 meshes with the rack 5.

[0045] The drive component 7 is used to drive the drive gear 6 connected to it to rotate. The drive component 7 is preferably a hydraulic motor. Compared with ordinary motors, hydraulic motors have the following advantages: they are more adaptable to the oily and humid environment of tunnels; they have low speed and high torque; they have stepless speed regulation and precise control of movement; they have a compact structure, flexible layout and strong impact resistance.

[0046] The support mechanism is used to bear the load of the trolley 1. The support mechanism consists of a support frame 4 and a load balancing assembly. The drive component 7 is connected to the load balancing assembly on the support frame 4. The load balancing assembly includes a load balancing wheel 8 and a hanging wheel 9. The load balancing wheel 8 rolls with the guide rail 10, and the hanging wheel 9 engages with the upper surface of the lower cover plate 1011 of the bottom longitudinal beam 101 of the trolley 1.

[0047] The traveling drive seat 100 is equipped with a load balancing assembly, which includes a load balancing wheel 8 and a hanging wheel 9. The load balancing wheel 8 rolls with the guide rail 10 located at the bottom of the bottom longitudinal beam 101 of the trolley 1, and the hanging wheel 9 engages with the upper surface of the lower cover plate 1011 of the bottom longitudinal beam 101 of the trolley 1.

[0048] To improve the stability of the construction trolley 1 during movement, the support frame 4 is equipped with two sets of load-bearing balance components located on both sides, with the drive gear 6 positioned between the two sets of load-bearing balance components. In addition, the load-bearing balance wheel 8 has flanges 81 on both sides, which are respectively positioned on both sides of the guide rail 10.

[0049] Furthermore, the travel drive seat 100 is provided with two pairs of load-bearing balance wheels 8 spaced apart front and rear. The two pairs of load-bearing balance wheels 8 can be made to be exactly the same in size and structure, or as shown in the attached figure of this specification, while providing a pair of load-bearing balance wheels 8 with a large diameter, a pair of load-bearing balance wheels 8 are added specifically to balance the entire travel drive seat 100, preventing the travel drive seat 100 from tilting when it is suspended in the air (because the hydraulic motor side is biased, it is easy to cause the entire travel drive seat 100 to tilt).

[0050] In one embodiment, the support frame 4 of the walking drive seat 100 includes a base 41 and side plates, with the side plates fixed to both sides of the base 41 respectively. The drive component 7 and the load-bearing balance assembly are connected between the two side plates. In this embodiment, the side plate structure of the walking drive seat 100 adopts an integrated structure as seen in the prior art.

[0051] It should be noted that drive devices are designed on the longitudinal beams 101 on both sides of the bottom of the construction trolley 1. When facing a curve, because the design of tunnels or road curves generally allows the vehicle to generate a certain centripetal force when turning, the sides of the road are designed to be higher on the outside and lower on the inside. Therefore, when the trolley passes through a curve, the height of the travel drive seats 1003 on both sides of the bottom of the trolley 1 needs to be adjusted so that the travel drive seats 100 on both sides are at the same height, that is, the top of the entire trolley is in a horizontal state, so as to prevent the trolley from losing its center of gravity. To achieve the above objectives, the drive unit 100 needs to have a height adjustment function. As another optimized embodiment, the side plates on both sides of the base 41 of the drive unit 100 are designed as a split structure. Specifically, the side plates consist of an inner plate 42 and an outer plate 43, which are fixedly connected by bolts. The drive component 7 and the load balancing assembly are connected between the inner plates 42 on both sides of the base, and the outer plate 43 is fixedly connected to the base 43. Thus, the height of the drive unit 100 can be adjusted by adjusting the position of the mounting holes on the inner plates 42 and the outer plates 43. It should be noted that the inner plates 42 and the outer plates 43 can be configured as follows: the outer plate 43 has a row of mounting holes arranged along the height direction, while the inner plate 42 has a relatively small number of mounting holes (generally 3-4, just enough to ensure the reliability of the connection strength). By adjusting the position of the mounting holes, the relative position of the inner plates 42 and the outer plates 43 on both sides of the support frame 4 can be adjusted, thereby adjusting the relative height of the drive component and the load balancing assembly with the base 41, and thus adjusting the overall height of the drive unit 100.

[0052] Furthermore, support parts 44 are rotatably connected to the base 41 of the support frame 4 on both opposite sides via pins, and the bottom of the support part 44 has two branch feet. This design allows the support part 44 to adaptively adjust its support according to the terrain.

[0053] The working principle of this utility model is as follows: The predetermined walking drive seat 100 is positioned against the support leg 3 closest to the direction of travel. The support leg 3 of the trolley 1 is raised until the base 41 of the walking drive seat 100 touches the ground, and simultaneously, the traveling roller 2 also contacts the ground. At this point, the trolley 1 is in the starting state of travel. Then, the drive component 7 drives the drive gear 6 to rotate. Under the meshing transmission of the drive gear 6 with the rack 5, the drive gear 6 moves the trolley 1 forward a predetermined distance. Next, the support leg 3 of the trolley 1 is lowered to support the ground. At this point, the base 41 of the walking drive seat 100 and the traveling roller 2 are in a suspended state. The drive component 7 drives the drive gear 6 to rotate. Under the meshing transmission of the drive gear 6 with the rack 5, the drive gear 6 moves the walking drive seat 100 forward to the predetermined distance. This process is repeated to achieve the forward movement of the trolley 1.

[0054] The specific embodiments of this utility model have been described above. However, those skilled in the art should understand that this is only an example. Those skilled in the art can make various changes or modifications to this embodiment without departing from the principle and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. A tunnel construction trolley travel drive device, wherein the bottom of the trolley is equipped with traveling rollers and lifting support legs, characterized in that: A rack arranged in a horizontal direction is fixed on the bottom surface of the bottom longitudinal beam of the trolley, and a travel drive seat that can move back and forth along the rack is connected to the rack. The bottom longitudinal beam of the trolley is also fixed with a guide rail that is parallel to the rack in the horizontal direction. The walking drive unit includes: A transmission component is used to drive the travel drive seat to move back and forth along the longitudinal beam at the bottom of the trolley. The transmission component is provided with a drive gear corresponding to the rack, and the drive gear meshes with the rack. A drive component, used to drive the rotation of the drive gear that is connected to its transmission; The support mechanism is used to bear the load of the trolley. The support mechanism consists of a support frame and a load balancing assembly. The drive component is connected to the load balancing assembly on the support frame. The load balancing assembly includes a load balancing wheel and a hanging wheel. The load balancing wheel rolls with the guide rail, and the hanging wheel engages with the upper surface of the lower cover plate of the bottom longitudinal beam of the trolley.

2. The tunnel construction trolley travel drive device according to claim 1, characterized in that: The support frame includes a base and side plates, the side plates are fixed to both sides of the base, and the drive component and the load balancing assembly are connected between the two side plates.

3. The tunnel construction trolley travel drive device according to claim 1, characterized in that: The support frame is equipped with two sets of load balancing components located on both sides of it, and the drive gear is located between the two sets of load balancing components.

4. The tunnel construction trolley travel drive device according to claim 1, characterized in that: The support frame is equipped with two pairs of load-bearing balance wheels spaced apart front and rear, and the two pairs of load-bearing balance wheels may have the same or different diameters.

5. The tunnel construction trolley travel drive device according to claim 1, characterized in that: The load-bearing balance wheel is provided with baffles on both sides, and the baffles on both sides are respectively limited to the two sides of the guide rail.

6. The tunnel construction trolley travel drive device according to claim 2, characterized in that: The side plate consists of an inner plate and an outer plate, which are fixedly connected by bolts. The drive component and the load balance assembly are connected between the inner plates on both sides of the base. The outer plate is fixedly connected to the base. The height of the walking drive seat can be adjusted by adjusting the position of the mounting holes on the inner and outer plates.

7. The tunnel construction trolley travel drive device according to claim 2, characterized in that: The base of the support frame is rotatably connected to two opposite sides by pins, and the bottom of the support has two branch feet.

8. The tunnel construction trolley travel drive device according to claim 1, characterized in that: The driving component is a hydraulic motor.

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