Slewing bearing for top shield machine

Abstract

The utility model discloses a pivotal bearing for a top shield machine. The pivotal bearing comprises a cutterhead and a shield body system outer cylinder, one side, close to the shield body system outer cylinder, of the cutterhead extends to form a fixed disc; a main fixing plate is arranged on the inner wall of the shield body system outer cylinder, a driving motor is arranged on the fixing plate, the output end of the driving motor is connected with a driving gear, the driving gear is connected with a driven gear, a main body of the driven gear is connected with a fixing sleeve through a bolt, and the fixing sleeve is fixedly connected with a fixing disc through a bolt; a bearing ring body is arranged on the inner diameter face of the driven gear. The bearing is compact in structure, the driven gear is effectively supported by the built-in bearing ring body, the bearing capacity is greatly enhanced, meanwhile, the sealing performance is further improved, dust is prevented from entering the bearing, the cleaning frequency is reduced, and the operation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of roof shield machine, especially relates to a rotary bearing for roof shield machine. BACKGROUND

[0002] In tunneling engineering, the roof shield machine is an advanced tunnel construction machine, which can carry out efficient and accurate excavation operation underground through its unique cutterhead rotation and propulsion system. Among them, the rotary bearing is one of the core components of the roof shield machine, which undertakes the important task of supporting the cutterhead, transmitting power and bearing complex load.

[0003] The rotary bearing in the prior art has large friction resistance in the transmission process, resulting in low transmission efficiency; and the effective bearing of the rotary bearing is low in radial and axial load, resulting in easy damage of the bearing under high load; meanwhile, the sealing structure of the existing rotary bearing is not perfect, which is easy to let dust and impurities enter the bearing, affecting the service life and performance of the device. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a rotary bearing for roof shield machine with high stability.

[0005] The utility model discloses a rotary bearing for roof shield machine, including cutterhead, shield system outer tube, the cutterhead is equipped with fixed disc on the side extension of shield system outer tube, the fixed disc is equipped with the drive motor on the main fixed plate of shield system outer tube inner wall, the drive motor output end is connected with driving gear, the driving gear is connected with driven gear, the driven gear main part passes through bolt and is connected with fixed sleeve, the fixed sleeve passes through bolt and is fixedly connected with fixed disc, the inner diameter surface of driven gear is equipped with bearing ring body.

[0006] Preferably, the main fixed plate and the shield system outer tube left side port are equipped with the vice fixed plate, the driving gear both ends are equipped with the connecting shaft, and the connecting shaft and the main fixed plate, the vice fixed plate between both sides are equipped with the bearing.

[0007] Preferably, the outer diameter surface of bearing ring body is equipped with three groups of grooves, and the three groups of grooves are equipped with bearings, the inner diameter surface of driven gear is equipped with the convex, and the inner diameter surface of convex and the inner diameter surface of driven gear on both sides of convex are in contact with three bearings.

[0008] Preferably, one side of bearing ring body is connected with the main fixed plate through bolt, the other side is connected with the sealing ring through bolt, and O type ring is arranged between the sealing ring and the fixed sleeve.

[0009] Preferably, the sealing assembly is composed of the outer sealing ring and the sealing ring, the sealing ring is arranged on the inner diameter surface of the outer sealing ring, and the outer sealing ring is connected and fixed with the vice fixed plate through bolt.

[0010] Compared with the prior art, the utility model has the advantages of:

[0011] 1. By configuring bearing on both sides of the driving gear, reduce the friction and vibration in the transmission process, ensure the smooth power transmission, not only significantly improve the operation stability of the equipment, also effectively reduce the mechanical wear caused by vibration, prolong the service life of the overall equipment;

[0012] 2. The driving gear inside is additionally provided with a bearing ring body, which not only enhances the overall rigidity of the gear system, but also significantly improves its ability to withstand complex load; Even in extreme working conditions, it can ensure stable operation of the equipment and meet more stringent construction requirements.

[0013] 3. Multiple O-rings and sealing rings are arranged, which further improve the sealing performance of the equipment and greatly increase the operation reliability. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of the utility model.

[0015] Figure 2 It is a structural schematic view of the sealing assembly of the utility model.

[0016] Among them, 1 cutter head, 2 shield system outer cylinder, 3 fixed disc, 4 main fixed plate, 5 driving motor, 6 driving gear, 601 connecting shaft, 7 driven gear, 701 protrusion, 8 fixed sleeve, 9 bearing ring body, 901 recess, 10 auxiliary fixed plate, 11 bearing, 12 sealing ring, 13 O-ring, 14 sealing assembly, 1401 outer sealing ring, 1402 sealing ring. DETAILED DESCRIPTION

[0017] The following specific embodiments illustrate the embodiments of the utility model, and those skilled in the art can easily understand other advantages and effects of the utility model from the disclosed content.

[0018] It should be noted that in the description of the utility model, it needs to be explained that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a specific orientation, structure and operation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance. The terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0019] In the description of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be 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, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0020] As shown in Figures 1-2 A rotary bearing for a top shield machine, comprising a cutter head 1, a shield body system outer cylinder 2; the cutter head 1 is provided with a fixed disc 3 on the side extending away from the shield body system outer cylinder 2; the inner wall of the shield body system outer cylinder 2 is provided with a main fixed plate 4, the fixed plate 4 is provided with a driving motor 5, the output end of the driving motor 5 is connected with a driving gear 6, the driving gear 6 is connected with a driven gear 7, the main body of the driven gear 7 is connected with a fixed sleeve 8 through bolts, and the fixed sleeve 8 is fixedly connected with the fixed disc 3 through bolts; the inner diameter surface of the driven gear 7 is provided with a bearing ring body 9.

[0021] As shown in Figure 1 The main fixed plate 4 and the left side port of the shield body system outer cylinder 2 are provided with a secondary fixed plate 10, the driving gear 6 is provided with a connecting shaft 601 at both ends, and the connecting shafts 601 on both sides are provided with bearings 11 between the main fixed plate 4 and the secondary fixed plate 10; the frictional resistance in the transmission process is reduced, and the transmission efficiency is improved.

[0022] As shown in Figure 1As shown, the outer diameter surface of the bearing ring body 9 is provided with three sets of grooves 901, and the three sets of grooves 901 are each provided with a bearing 11. The inner diameter surface of the protrusion 701 and the inner diameter surface of the driven gear 7 on both sides of the protrusion are in contact with the three sets of bearings 11. The bearings in the grooves reduce friction, improve the smoothness and efficiency of rotation, and at the same time bear radial and axial loads, thereby enhancing the load-carrying capacity of the bearings.

[0023] As shown in the drawings, Figure 1 One side of the bearing ring body 9 is connected to the main fixed plate 4 by a bolt, and the other side is connected to a sealing ring 12 by a bolt. An O-ring 13 is arranged between the sealing ring 12 and the fixed sleeve 8. This arrangement prevents dust raised by transported mud from entering the bearing ring body, thereby improving the sealing performance.

[0024] As shown in the drawings, Figures 1-2 A sealing assembly 14 is arranged between the fixed sleeve 8 and the auxiliary fixed plate 10. The sealing assembly 14 is composed of an outer sealing ring 1401 and a sealing ring 1402. The sealing ring 1402 is arranged on the inner diameter surface of the outer sealing ring 1401, and the outer sealing ring 1401 is connected to the auxiliary fixed plate 10 by a bolt. The sealing assembly effectively prevents impurities from entering and protects key components such as bearings and gears from being eroded by the external environment. Multiple sealing rings are provided to provide multiple sealing protection and enhance the reliability of the sealing.

[0025] The working principle of the utility model is described as follows: when the shield machine starts to work, the driving motor is started, and the driving gear connected to the output end of the driving motor rotates; the driving gear is engaged with the driven gear to transmit power to the driven gear; the driven gear body is connected to the fixed sleeve by a bolt, and the fixed sleeve is fixedly connected to the fixed disc extended from one side of the cutter head, thereby driving the cutter head to rotate. The bearings at both ends of the driving gear not only support the connecting shaft but also reduce the friction resistance of the connecting shaft during rotation, thereby ensuring the smoothness of rotation. In addition, the inner diameter surface of the driven gear is provided with a bearing ring body, which provides additional support and guidance for the driven gear, thereby further improving the stability and precision of transmission. The entire transmission system is compact and reasonable, and the components are closely matched, thereby ensuring the efficient and stable operation of the shield machine in complex working environments.

[0026] The above-described embodiments are merely preferred embodiments of the utility model and do not limit the concept and scope of the utility model. Various modifications and improvements to the technical solutions of the utility model made by those skilled in the art without departing from the design concept of the utility model shall fall within the protection scope of the utility model. The technical content claimed by the utility model has been fully recorded in the claims.

Claims

1. A slewing bearing for a top shield machine, characterized in that Including the cutter head, the shield system outer tube, the cutter head extends and is equipped with the fixed disc on the side of the shield system outer tube, the main fixed plate is equipped on the inner wall of the shield system outer tube, the drive motor is equipped on the fixed plate, the drive motor output end is connected with the driving gear, the driving gear is connected with the driven gear, the driven gear main body is connected with the fixed sleeve through the bolt, the fixed sleeve is fixedly connected with the fixed disc through the bolt, the inner diameter surface of the driven gear is equipped with the bearing ring body.

2. A slewing bearing for a top shield machine according to claim 1, characterized in that The vice fixed plate is equipped between the main fixed plate and the left side port of the shield system outer tube, the connecting shaft is equipped on both ends of the driving gear, and the bearing is equipped between the connecting shaft and the main fixed plate and the vice fixed plate on both sides.

3. A slewing bearing for a top hammer according to claim 1, characterized in that The outer diameter surface of the bearing ring body is equipped with three groups of grooves, the bearing is equipped in the three groups of grooves, the inner diameter surface of the driven gear is equipped with the convex, and the inner diameter surface of the convex and the inner diameter surface of the driven gear on both sides of the convex are in contact with the three groups of bearings.

4. The slewing bearing for a top hammer according to claim 1, characterized in that One side of the bearing ring body is connected with the main fixed plate through the bolt, the other side is connected with the sealing ring through the bolt, and the O-shaped ring is equipped between the sealing ring and the fixed sleeve.

5. A slewing bearing for a top hammer according to claim 1, characterized in that The sealing assembly is equipped between the fixed sleeve and the vice fixed plate, the sealing assembly is composed of the outer sealing ring and the sealing ring, the sealing ring is arranged on the inner diameter surface of the outer sealing ring, and the outer sealing ring is connected and fixed with the vice fixed plate through the bolt.

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