Shield body convenient to turn

Abstract

The utility model relates to the technical field of shield equipment, in particular to a shield body convenient to turn. The shield body comprises a cutterhead, a shield body and a telescopic cylinder, the shield body and the cutter head are coaxially arranged; the two ends of each telescopic cylinder are hinged to the cutter head and the shield body respectively, the multiple telescopic cylinders are arranged at intervals in the circumferential direction of the cutter head, and an included angle is formed between the length direction of the projection of at least one telescopic cylinder and the radial direction of the cutter head in the axial view angle of the cutter head. The telescopic cylinder can be used for resisting part of torque from the cutterhead, the bearing pressure of the hinge structure between the telescopic cylinder and the cutterhead and the shield body can be reduced, and the failure probability of the hinge structure is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of shield equipment, and particularly to a shield body facilitating turning. Background Art

[0002] As the most advanced large-scale equipment in current underground engineering construction, a shield machine integrates multiple processes such as tunneling, muck removal, and support, can achieve one-time forming of tunnel construction, and has the advantages of high efficiency, safety, and high economic benefits. The application of shield machines in the construction of tunnels in fields such as railways, water conservancy, hydropower, subways, and mines in China is also becoming more and more extensive, and the shield body structure is an important part of the shield machine.

[0003] With the increasing requirements for the construction of urban rail transit, the engineering uses of urban rail transit are becoming more and more extensive, and small-radius curve turning situations have also begun to appear in urban rail transit construction. For example, a shield body hinge device is disclosed in a Chinese utility model patent with the publication number CN207315384U. It hinges no less than eight cylinders between the front shield and the cutter head, and realizes the turning of the shield body conveniently by controlling the telescoping of the cylinders. However, during the tunneling process of the cutter head, the hinge device also bears a large torque, and this torque directly acts on the connection structure between the cylinder and the cutter head and the connection structure between the cylinder and the front shield, which easily leads to the failure of the connection structure. Utility Model Content

[0004] The present application provides a shield body facilitating turning. By reasonably arranging the postures of the cylinders, the cylinders can share the torque borne by the connection structures between them and the cutter head and the shield body main body, thereby reducing the probability of connection structure failure.

[0005] The present application is realized through the following technical solutions:

[0006] A shield body facilitating turning, comprising:

[0007] A cutter head;

[0008] A shield body main body, the shield body main body and the cutter head are arranged coaxially;

[0009] A telescopic cylinder, both ends of the telescopic cylinder are respectively hinged to the cutter head and the shield body main body, and a plurality of telescopic cylinders are arranged at intervals along the circumference of the cutter head. Among them, from the axial view of the cutter head, the length direction of the projection of at least one telescopic cylinder forms an angle with the radial direction of the cutter head.

[0010] In some optional embodiments, from the axial view of the cutter head, the length direction of the projection of each telescopic cylinder forms an angle with the radial direction of the cutter head.

[0011] In some optional embodiments, two adjacent telescopic cylinders are arranged in a V shape.

[0012] In some alternative embodiments, the shield body includes:

[0013] A middle shield, on which a rotating block is rotatably arranged. The rotating block can rotate on its own axis on the middle shield, and a plurality of first connecting portions are arranged on the rotating block at intervals along the rotation direction of the rotating block;

[0014] A driving assembly, which is arranged on the middle shield and is connected to the rotating block to drive the rotating block to rotate on its own axis;

[0015] A rear shield, which is arranged coaxially with the middle shield. A plurality of second connecting portions are arranged on the rear shield at intervals along the circumferential direction of the rear shield;

[0016] Wherein, the first connecting portions and the second connecting portions correspond to each other one by one in the axial direction of the middle shield.

[0017] In some alternative embodiments, the driving assembly includes:

[0018] A rack, which is configured to be annular and is connected to the rotating block. The axial direction of the rack coincides with the rotation central axis of the rotating block;

[0019] A gear, which meshes with the rack;

[0020] An electric motor, which is connected to the middle shield and cooperates with the gear to drive the gear to rotate.

[0021] In some alternative embodiments, a rotating groove and a ball groove are arranged on the middle shield. The opening of the ball groove is flush with the bottom of the rotating groove. The rotating block is located in the rotating groove, and a number of balls in contact with the rotating block are arranged in the ball groove.

[0022] In some alternative embodiments, a plurality of slots are arranged on the middle shield at intervals along the circumferential direction of the middle shield, and a plurality of insertion blocks are arranged on the rear shield at intervals along the circumferential direction of the middle shield. The insertion blocks and the slots correspond to each other one by one in the axial direction of the middle shield.

[0023] In some alternative embodiments, a clamping block is elastically arranged in the slot, and a clamping groove for inserting the clamping block is arranged on the insertion block.

[0024] In some alternative embodiments, a limiting groove and a receiving groove for accommodating the clamping block are arranged on the middle shield. The receiving groove communicates with the slot, the limiting groove communicates with the receiving groove through a communication hole, an insertion rod inserted into the communication hole is arranged on the clamping block, a limiting ring located in the limiting groove is connected to the insertion rod, and the limiting ring is connected to the groove wall of the limiting groove through an elastic member. The insertion rod can keep the clamping block in the slot under the elastic force of the elastic member.

[0025] In some alternative embodiments, through slots are coaxially formed in the middle shield and the tail shield respectively.

[0026] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0027] For a shield body facilitating turning provided by the present application, there is an oil cylinder in the oil cylinder between the shield body and the cutter head, and the length direction of the oil cylinder intersects the axial direction of the cutter head in a skew manner. When the cutter head as a whole applies torque to the shield body, the oil cylinder can resist part of the torque, specifically manifested as the oil cylinder resisting elongation or the oil cylinder resisting contraction, thereby reducing the bearing pressure of the hinge structure between the oil cylinder, the cutter head, and the shield body, and further reducing the probability of hinge structure failure. Description of the Drawings

[0028] The drawings described herein are used to provide a further understanding of the embodiments of the present application, constitute a part of the present application, and do not limit the embodiments of the present application. In the drawings:

[0029] Figure 1 is a schematic structural diagram of a shield body facilitating turning provided by an embodiment of the present application;

[0030] Figure 2 is a schematic structural diagram of the cooperation between the shield body and the cutter head provided by an embodiment of the present application;

[0031] Figure 3 is a schematic structural diagram of the tail shield provided by an embodiment of the present application;

[0032] Figure 4 is a schematic structural diagram of the telescopic cylinder provided by an embodiment of the present application;

[0033] Figure 5 is Figure 2 an enlarged schematic diagram of the structure at A;

[0034] Figure 6 is Figure 2 an enlarged schematic diagram of the structure at B;

[0035] Figure 7 is Figure 2 an enlarged schematic diagram of the structure at C.

[0036] Marks in the drawings and corresponding component names:

[0037] 1 - Cutter head; 11 - Telescopic cylinder; 111 - Mounting seat; 112 - Rotating shaft; 113 - Fixed plate; 2 - Middle shield; 21 - Through slot; 211 - Plug rod; 212 - Clamping block; 213 - Limiting groove; 214 - Limiting ring; 215 - Elastic member; 216 - Storage groove; 217 - Slot; 22 - Mounting groove; 23 - Ball groove; 24 - Ball; 25 - Rotating groove; 26 - Rotating block; 27 - Threaded hole; 28 - Rack; 29 - Retaining ring; 291 - Protection chamber; 292 - Motor; 293 - Transmission rod; 294 - Gear; 3 - Tail shield; 31 - Connecting block; 32 - Bolt; 33 - Insert block. Detailed implementation manners

[0038] To make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below with reference to the embodiments and the accompanying drawings. The illustrative embodiments and descriptions thereof of the present application are only used to explain the present application and shall not be construed as limiting the present application.

[0039] Please refer to Figures 1 to 7, embodiments of the present application provide a shield body that is convenient for turning. The shield body convenient for turning includes a cutter head 1, a shield body main body, and a telescopic cylinder 11. The front of the cutter head 1 serves as a working surface for rock breaking, and the back of the cutter head 1 is connected to the telescopic cylinder 11; an installation groove 22 is provided on the shield body main body, and the installation groove 22 is used for installing the telescopic cylinder 11; mounting seats 111 are provided at both ends of the telescopic cylinder 11 in the length direction, and the mounting seats 111 and the telescopic cylinder 11 can rotate relative to each other, that is, the mounting seats 111 and the telescopic cylinder 11 are hinged. The rotation mode between the mounting seats 111 and the telescopic cylinder 11 can be rotation in any direction, or rotation in a certain or certain planes. For example, a rotating shaft 112 is rotatably connected inside the mounting seat 111, and fixing plates 113 are fixedly connected to both ends of the telescopic cylinder 11. By fixedly connecting the rotating shaft 112 with the fixing plates 113, the telescopic cylinder 11 can make a small turn. That is, for a single telescopic cylinder 11, the telescopic cylinder 11 can rotate relative to the cutter head 1 or the shield body main body in a certain plane, so as to be applicable to occasions with a single turning requirement. In other embodiments, universal hinges can be used at both ends of the telescopic cylinder 11 to be respectively connected to the cutter head 1 and the shield body main body to be applicable to occasions with more turning requirements. One of the mounting seats 111 at one end of the telescopic cylinder 11 is fixedly installed inside the installation groove 22, and the mounting seat 111 at the other end is fixedly installed on the back of the cutter head 1. Thus, the deflection of the cutter head 1 can be realized through the telescoping of the telescopic cylinder 11, and further the turning of the shield body can be realized. According to needs, the number of telescopic cylinders 11 is not limited. Generally, it can be set to eight. In other embodiments, the number can be set more or less. Among them, in the axial view of the cutter head 1, at least one projection of the telescopic cylinder 11 forms an angle with the radial direction of the cutter head 1. Thus, after the cutter head 1 applies torque, this telescopic rod can resist part of the torque, and the bearing pressure of the hinge structure between the telescopic cylinder 11 and the cutter head 1 and the shield body main body is reduced, and further the failure probability of the joint structure is reduced.

[0040] In some alternative embodiments, each telescopic cylinder 11 can be individually configured with a distance sensor, and the distance sensor can monitor the telescopic amount of each telescopic cylinder 11, so as to realize the precise control of the telescopic amount of each telescopic cylinder 11.

[0041] In the axial view of the cutter head 1, the more the number of telescopic cylinders 11 whose projection length direction forms an angle with the radial direction of the cutter head 1, the stronger the overall torque resistance ability of the telescopic cylinders 11. Therefore, in some alternative embodiments, in the axial view of the cutter head 1, the projection length direction of each telescopic cylinder 11 forms an angle with the radial direction of the cutter head 1, that is, each telescopic cylinder 11 shares the torque by resisting telescoping, thereby greatly reducing the bearing pressure of the hinge structure between the telescopic cylinder 11 and the cutter head 1 and the shield body main body.

[0042] In some alternative embodiments, two adjacent telescopic cylinders 11 are arranged in a V shape, which means that for two adjacent telescopic cylinders 11, their inclination angles are opposite, so as to improve the structural stability of the overall telescopic cylinder 11 when resisting torque, and further improve the torque resistance ability of the telescopic cylinder 11.

[0043] In some alternative embodiments, the shield body includes a driving assembly, a middle shield 2 and a tail shield 3; a rotating block 26 is rotatably arranged on the middle shield 2, and the rotating block 26 can rotate on its own axis on the middle shield 2. For example, the rotating block 26 can be configured as an annular block. An annular rotating groove 25 is coaxially opened on the middle shield 2 from its end face close to the tail shield 3. The rotating block 26 is located in the rotating groove 25. Among them, the notch of the rotating groove 25 faces the axis of the middle shield 2, which means that the rotating block 26 is sleeved on the groove wall of the rotating groove 25. A plurality of first connecting parts are arranged on the rotating block 26 at intervals along the self-rotation direction of the rotating block 26, which means that the plurality of connecting parts are arranged in a circumferential pattern around the axis of the middle shield 2; the driving assembly is arranged on the middle shield 2, and the driving assembly is connected to the rotating block 26 to drive the rotating block 26 to rotate on its own axis; the tail shield 3 is arranged coaxially with the middle shield 2, and a plurality of second connecting parts are arranged on the tail shield 3 at intervals along the circumferential direction of the tail shield 3. Specifically, a connecting block 31 can be arranged on the tail shield 3, and the plurality of second connecting parts are located on the connecting block 31; among them, the first connecting parts and the second connecting parts correspond to each other one by one in the axial direction of the middle shield 2.

[0044] In the embodiments of the present application, the first connecting part and the second connecting part can be used to realize the firm connection between the middle shield 2 and the tail shield 3. When the shield body turns, the first connecting part and the second connecting part need to be separated from each other. After the turning is completed, the first connecting part and the second connecting part need to be reconnected. Affected by the processing accuracy, when the middle shield 2 and the tail shield 3 rotate relative to each other in the circumferential direction, for example, the tail shield 3 rotates 180 degrees relative to the middle shield 2, at this time, each first connecting part and the second connecting part may not be able to correspond to each other one by one, or the positions are roughly corresponding, but there are slight alignment errors, which will affect the connection stability or the connection cannot be formed. At this time, the driving assembly can be used to drive the rotating block 26 to rotate so that the first connecting part and the second connecting part form an accurate alignment relationship, so as to realize the connection between the middle shield 2 and the tail shield 3, without the need to rotate the middle shield 2 or the tail shield 3, which is beneficial to improving the connection convenience of the middle shield 2 and the tail shield 3.

[0045] In some alternative embodiments, both the first connecting part and the second connecting part can be configured as threaded holes 27, and at least one of the first connecting part and the second connecting part is a through hole, so that the middle shield 2 and the tail shield 3 can be stably connected by sequentially screwing the bolts 32 with the first connecting part and the second connecting part.

[0046] In some alternative embodiments, the driving assembly may specifically include a rack 28, a gear 294, and a motor 292; the rack 28 is fixedly installed on the rotating block 26. When the rotating block 26 is configured as an annular block, the rack 28 is installed on the end face of the rotating block 26 close to the tail shield 3. A retaining ring 29 is fixedly installed on the end face of the middle shield 2 close to the rotating block 26. The retaining ring 29 can also be configured as an annular block. The radial width of the retaining ring 29 is smaller than the radial width of the rotating block 26 to avoid excessive obstruction of the rotating block 26 by the retaining ring 29. The inner ring of the retaining ring 29 is adapted to the connecting block 31. In this way, when connecting the middle shield 2 and the tail shield 3, the retaining ring 29 and the connecting block 31 can play a certain positioning role. A protection chamber 291 is formed inside the retaining ring 29. The gear 294 is rotatably connected to the inner wall of the protection chamber 291. The motor 292 is fixedly connected to the inner wall of the protection chamber 291. The output end of the motor 292 is fixedly connected to the gear 294 through a transmission rod 293. Thus, the motor 292 can drive the gear 294 to rotate. The gear 294 meshes with the rack 28. Thus, the rotation of the gear 294 can drive the rotating block 26 to rotate self - sufficiently.

[0047] To improve the rotational smoothness of the rotating block 26, in some alternative embodiments, a ball groove 23 is coaxially formed at the bottom of the rotating groove 25. The radial width of the ball groove 23 is smaller than the radial width of the rotating groove 25. A plurality of balls 24 are arranged inside the ball groove 23. The balls 24 can be arranged in the ball groove 23 in a placed form, or can be arranged at the bottom of the ball groove 23 through a groove - locking ball process. The end face of the rotating block 26 facing away from the tail shield 3 is in contact with the plurality of balls 24.

[0048] To facilitate the connection operation between the middle shield 2 and the tail shield 3, in some alternative embodiments, a plurality of slots 217 are arranged on the middle shield 2 at intervals along the circumferential direction of the middle shield 2. A plurality of insertion blocks 33 are arranged on the tail shield 3 at intervals along the circumferential direction of the middle shield 2. The insertion blocks 33 and the slots 217 correspond to each other axially of the middle shield 2.

[0049] In the embodiments of the present application, the arrangement of the insertion blocks 33 and the slots 217 can facilitate the rapid positioning of the middle shield 2 and the tail shield 3, thus facilitating the rapid alignment of the first connection part and the second connection part; at the same time, it can also improve the connection stability between the middle shield 2 and the tail shield 3.

[0050] In order to further improve the connection stability between the middle shield 2 and the tail shield 3 and at the same time enhance the connection convenience between the middle shield 2 and the tail shield 3, in some alternative embodiments, a clamping block 212 is elastically arranged in the slot 217, and a clamping groove for the clamping block 212 to be inserted into is arranged on the insertion block 33. Specifically, a limiting groove 213 and a storage groove 216 for accommodating the clamping block 212 are arranged on the middle shield 2. The storage groove 216 communicates with the slot 217, the limiting groove 213 communicates with the storage groove 216 through a communication hole, an insertion rod 211 inserted into the communication hole is arranged on the clamping block 212, a limiting ring 214 located in the limiting groove 213 is connected to the insertion rod 211, and the limiting ring 214 is connected to the groove wall of the limiting groove 213 through an elastic member 215. The elastic member 215 can be configured as a spring and sleeved on the insertion rod 211. The insertion rod 211 can make the clamping block 212 stay in the slot 217 under the elastic force of the elastic member 215. Among them, a protruding block is arranged on the insertion block 33. When the clamping block 212 is located in the slot 217, it can play a mechanical limiting role on the protruding block in the axial direction of the cutter head 1.

[0051] When connecting the middle shield 2 and the tail shield 3, first insert the insertion block 33 into the slot 217, pull the clamping block 212 to make the protruding block on the insertion block 33 cross over the clamping block 212, and then lower the clamping block 212 to make the clamping block 212 limit the protruding block, so that the middle shield 2 and the tail shield 3 are relatively fixed. Check whether the coaxiality of the first connection part and the second connection part meets the requirements. According to the need, drive the gear 294 to rotate through the motor 292, so as to drive the rotating block 26 to rotate to make the coaxiality of the first connection part and the second connection part meet the requirements. Then, sequentially pass bolts 32 through the first connection part and the second connection part to make the middle shield 2 and the tail shield 3 form a firm connection.

[0052] In some alternative embodiments, through grooves 21 are coaxially arranged on the middle shield 2 and the tail shield 3 respectively.

[0053] In the embodiment of the present application, the through grooves 21 can facilitate the installation of other internal devices of the shield machine.

[0054] The above describes the embodiments of the present application with specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Although the description of the present application will be introduced in combination with some embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of introducing the application in combination with the embodiment is to cover other alternatives or modifications that may be extended based on the claims of the present application. In order to provide a deep understanding of the present application, many specific details are included in the above description. The present application can also be implemented without using these details. In addition, in order to avoid confusion or obscuring the key points of the present application, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0055] It should be noted that in this specification, similar reference numerals and letters denote similar items in the above drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0056] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these changes and modifications.

Claims

1. A shield body that is convenient for turning, characterized in that, Comprising: Cutter head (1); Shield body, the shield body and the cutter head (1) are arranged coaxially; Telescopic cylinder (11), both ends of the telescopic cylinder (11) are respectively hinged to the cutter head (1) and the shield body, and a plurality of telescopic cylinders (11) are arranged at intervals along the circumferential direction of the cutter head (1). Among them, from the axial view of the cutter head (1), the length direction of the projection of at least one telescopic cylinder (11) forms an angle with the radial direction of the cutter head (1).

2. The shield body facilitating turning according to claim 1, wherein, From the axial view of the cutter head (1), the length direction of the projection of each telescopic cylinder (11) forms an angle with the radial direction of the cutter head (1).

3. The shield body facilitating turning according to claim 2, wherein Two adjacent telescopic cylinders (11) are arranged in a V shape.

4. The shield body facilitating turning according to claim 1, wherein, The shield body includes: Middle shield (2), a rotating block (26) is rotatably arranged on the middle shield (2), the rotating block (26) can rotate on its own on the middle shield (2), and a plurality of first connecting parts are arranged on the rotating block (26) at intervals along the self-rotation direction of the rotating block (26); Drive assembly, the drive assembly is arranged on the middle shield (2), and the drive assembly is connected to the rotating block (26) to drive the rotating block (26) to rotate on its own; Tail shield (3), the tail shield (3) and the middle shield (2) are arranged coaxially, and a plurality of second connecting parts are arranged on the tail shield (3) at intervals along the circumferential direction of the tail shield (3); Wherein, the first connecting parts and the second connecting parts correspond to each other axially on the middle shield (2).

5. The shield body facilitating turning according to claim 4, characterized in that, The drive assembly includes: Rack (28), the rack (28) is configured to be annular and connected to the rotating block (26), and the axial direction of the rack (28) coincides with the self-rotation central axis of the rotating block (26); Gear (294), the gear (294) meshes with the rack (28); Motor (292), the motor (292) is connected to the middle shield (2) and cooperates with the gear (294) to drive the gear (294) to rotate.

6. The shield body facilitating turning according to claim 4, characterized in that, A rotating groove (25) and a ball groove (23) are arranged on the middle shield (2), the notch of the ball groove (23) is flush with the bottom of the rotating groove (25), the rotating block (26) is located in the rotating groove (25), and a number of balls (24) in contact with the rotating block (26) are arranged in the ball groove (23).

7. The shield body facilitating turning according to claim 4, wherein A plurality of slots (217) are arranged on the middle shield (2) at intervals along the circumferential direction of the middle shield (2), a plurality of insertion blocks (33) are arranged on the tail shield (3) at intervals along the circumferential direction of the middle shield (2), and the insertion blocks (33) and the slots (217) correspond to each other axially on the middle shield (2).

8. The shield body facilitating turning according to claim 7, wherein, A clamping block (212) is elastically arranged in the slot (217), and a clamping groove for the clamping block (212) to be inserted is arranged on the insertion block (33).

9. The shield body facilitating turning according to claim 8, wherein, A limiting groove (213) and a storage groove (216) for accommodating the clamping block (212) are provided on the middle shield (2). The storage groove (216) communicates with the slot (217). The limiting groove (213) communicates with the storage groove (216) through a communication hole. A plug rod (211) inserted into the communication hole is provided on the clamping block (212). A limiting ring (214) located in the limiting groove (213) is connected to the plug rod (211). The limiting ring (214) is connected to the groove wall of the limiting groove (213) through an elastic member (215). The plug rod (211) can keep the clamping block (212) in the slot (217) under the elastic force of the elastic member (215).

10. The shield body facilitating turning according to claim 4, characterized in that, The middle shield (2) and the tail shield (3) are respectively coaxially provided with through grooves (21).

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