Detachable lifting lug of cutterhead

Abstract

The utility model discloses a detachable lifting lug of a cutter head. The detachable lifting lug comprises a trunnion, the trunnion is connected to one end of the lug seat, and the other end of the lug seat is fixedly provided with a convex ring part which is convex outwards and is provided with a groove in the middle; a round hole penetrating through the lug seat is formed in the center of the groove; the convex ring part is inserted into the cutter head outer ring connecting hole; and the lug seat is connected with the cutterhead through a lock pin assembly. According to the utility model, when the lifting lug is detachable so as to be reused, the use of bolt connection is avoided, so that the connection of the lifting lug is firm enough, the disassembly and assembly are quick and convenient, and the use efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of shield machine cutter head hoisting, in particular to a detachable lifting ear of the cutter head. Background Art

[0002] During the manufacturing and transfer process of the cutterhead of a tunnel boring machine, large lifting equipment is usually used to lift and transfer it due to its huge size and weight. In particular, during the manufacturing process, the cutterhead needs to be transferred many times. The lifting lugs connecting the lifting equipment are usually welded to the cutterhead body to make it strong enough. However, it is difficult to disassemble the welded lifting lugs themselves. After use, the lifting lugs need to be cut and scraped off, which is time-consuming and labor-intensive. In addition, the lifting lugs cannot be reused, resulting in waste.

[0003] In the prior art, the first type, such as the patent "Removable device for hoisting and turning over the cutter head of a shield machine" with the announcement number CN110836117A, is a device that finds an installation base inside the cutter head and uses four bolts to install the ear plate. The problem is that the threaded load-bearing capacity of the bolts is limited and the reliability is not high. Bolts with larger diameters need to be selected. The disassembly and assembly of the bolts requires the use of special tools, such as pneumatic wrenches, etc., which makes disassembly and assembly inconvenient; especially, its installation base is located inside the cutter head, and the space is limited, and the operation of large pneumatic wrenches and other tools is more inconvenient. The second technical solution, such as the patent "A detachable ear device for the cutter head of a shield machine" with the announcement number CN213016357U, is different from the first type in that the ear is installed on the outer ring of the cutter head by bolts. Although the problem of limited space is overcome, the problem of low reliability and inconvenience of disassembly and assembly still exists. The third type, such as the patent "A detachable lifting ear for a composite cutterhead of a shield machine" with announcement number CN209601931U, is actually a hook rather than a lifting ear. The hook is used to hook into the preset gap in the outer ring of the cutterhead to achieve the function of lifting the cutterhead; but the problem is that it relies on the preset gap in the cutterhead design, and is not applicable to cutterheads that do not have such a gap in the structure, or have a gap but do not match the hook. Secondly, if the preset gap in the outer ring of the cutterhead is too large, it will also affect the overall strength of the cutterhead. Summary of the invention

[0004] In order to overcome the deficiencies in the background technology, the utility model provides a detachable lifting ear for a cutter disc, aiming to design a lifting ear that is not connected by bolts, so that it has the performance of easy disassembly and assembly, firm and reliable, and is suitable for use in the production process of the cutter disc.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A detachable lifting ear for a cutter disc comprises an ear shaft for connecting a lifting device; the ear shaft is connected to one end of the ear seat, and the other end of the ear seat is fixedly provided with a convex ring portion that bulges outward and has a groove in the middle; the center of the groove is provided with a circular hole that passes through the ear seat; the convex ring portion is inserted into a connecting hole preset in the outer ring of the cutter disc and corresponding to the contour of the convex ring portion; it also comprises a locking pin with a cylindrical portion and a locking portion at both ends; the middle portion of the cylindrical portion is rotatably inserted into the circular hole; the end of the cylindrical portion and the locking portion are respectively located outside the two end surfaces of the circular hole; the locking portion can be embedded in the groove in a vertical posture, and when the locking pin is rotated to a horizontal posture of the locking portion, it can abut against the inner side wall of the outer ring of the cutter disc located at the connecting hole, so that the locking pin cannot be separated from the outer ring of the cutter disc; a latch member is inserted into a pin hole preset at the end of the cylindrical portion, and is used to connect the locking pin to the ear seat through the latch member when the locking pin cannot be separated from the connecting hole.

[0007] As a further optimization, the contour of the convex ring portion is an oblong circle, and the corresponding connecting hole is an oblong hole; the groove is an oblong groove, and the corresponding locking head portion is an oblong boss; the distance between the two arc surface vertices of the oblong boss is greater than the diameter of the oblong hole.

[0008] As a further optimization, the ear shaft is detachably connected to one end of the ear seat.

[0009] As a further optimization, the ear seat includes a bottom plate portion and a wing plate portion fixedly connected to two opposite edges of the rear side surface of the bottom plate portion; the ear axis is connected to the ends of the two wing plate portions; the convex ring portion is fixed on the front side surface of the bottom plate portion, and the circular hole is opened in the bottom plate portion at the center of the groove.

[0010] As a further optimization, the latch member includes a pin shaft portion inserted in the pin hole, the upper end of the pin shaft portion is configured as a platform portion for overlapping the outer surface of the cylindrical portion, and the upper end of the platform portion is provided with a pull ring portion.

[0011] As a further optimization, the platform portion has a rectangular shape, the front side surface of the rectangular block is in contact with the rear side surface of the bottom plate portion, and the left and right side surfaces of the rectangular block are respectively in contact with the inner side surfaces of the two wing plate portions.

[0012] As a further optimization, the lower end surface of the platform portion is set to be an arc surface corresponding to the cylindrical portion, so that when the platform portion overlaps the outer surface of the cylindrical portion, the arc surface fits with the outer side surface of the cylindrical portion.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] (1) This device does not use threaded connections, can be quickly disassembled and assembled, and is easy to operate and highly efficient.

[0015] (2) The load-bearing components and connecting components of the device are separated, so the load-bearing capacity is strong, and the connecting components are non-load-bearing and have high reliability.

[0016] (3) The load-bearing components of the device are fixed structures with reasonable structure, sturdy appearance and high load-bearing capacity.

[0017] In summary, the device makes the lifting lug detachable for reuse while avoiding the use of bolt connections to ensure that the connection of the lifting lug is sufficiently firm, and the disassembly and assembly is quick and convenient, thereby improving the use efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the embodiment 1 of the utility model installed on the cutter head;

[0019] Figure 2 It is an exploded view of parts of Example 1 of the utility model;

[0020] Figure 3 It is a cross-sectional view of Example 1 of the utility model.

[0021] The correspondence between the technical features in the figure and the reference numerals is: ear shaft 1; ear seat 2; convex ring portion 21; groove 22; circular hole 23; bottom plate portion 24; wing plate portion 25; cutter disc 3; connecting hole 31; locking pin 4; cylindrical portion 41; locking portion 42; pin hole 43; latch member 5; pin shaft portion 51; platform portion 52; pull ring portion 53; arc surface 54; hook 6. DETAILED DESCRIPTION

[0022] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only a part of the preferred embodiments of the present invention, rather than all the embodiments. It should be understood by those skilled in the art that these implementation methods are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0023] Example 1: Please refer to Figure 1-3 ;

[0024] The utility model provides the following technical solution: a detachable lifting ear of a cutter disc, comprising an ear shaft 1 for connecting a lifting device; the ear shaft 1 is connected to one end of an ear seat 2, and the other end of the ear seat 2 is fixedly provided with a convex ring portion 21 which is convex outward and has a groove 22 in the middle; a circular hole 23 penetrating the ear seat 2 is provided at the center of the groove 22; the convex ring portion 21 is inserted into a connection hole 31 preset on the outer ring of a cutter disc 3 and corresponding to the contour of the convex ring portion 21; and also includes a lock pin 4 with a cylindrical portion 41 and a lock portion 42 at both ends; the middle portion of the cylindrical portion 41 is rotatably inserted into the circular hole 23. ; The end of the cylindrical portion 41 and the locking portion 42 are respectively located outside the two end surfaces of the circular hole 23; the locking portion 42 can be embedded in the groove 22 in a vertical position, and the locking pin 4 can be abutted against the inner side wall of the outer ring of the cutter disc 3 located at the connecting hole 31 when the locking pin 4 is rotated to a horizontal position, so that the locking pin 4 cannot be separated from the outer ring of the cutter disc 3; the latch member 5 is inserted into the pin hole 43 preset at the end of the cylindrical portion 41, and is used to connect the locking pin 4 to the ear seat 2 through the latch member 5 when the locking pin 4 cannot be separated from the connecting hole 31.

[0025] The working principle includes: the ear seat 2 is inserted into the connection hole 31 of the cutter disc 3 through the convex ring portion 21, and the lock head portion 42 embedded in the convex ring portion 21 also enters the connection hole 31, and then the lock pin 4 is pushed axially so that the lock head portion 42 extends out of the convex ring portion 21, and then the cylindrical portion 41 is rotated until the lock head portion 42 is in a horizontal posture, and the cylindrical portion 41 is pulled until it abuts against the inner side wall of the outer ring of the cutter disc 3 at the connection hole 31, and the lock pin 4 cannot be separated from the outer ring of the cutter disc 3; then the latch member 5 is inserted into the pin hole 43, and the ear seat 2 and the lock pin 4 are connected and fixed as a whole, and the ear seat 2 is connected to the cutter disc 3. Figure 3As shown, when the hook 6 or the lifting rope of the lifting equipment hooks the ear shaft 1 for lifting, the ear seat 2 transmits the pulling force to the cutter disc 3 through the convex ring part 21, and the convex ring part 21 itself has a thick structure and a large bearing capacity, so that the ear seat 2 mainly bears the bending moment, which is greatly improved compared with the bearing capacity of the threaded connection. The ear seat 2 is locked on the cutter disc 3 through the locking pin 4. The locking pin 4 basically does not bear the weight of the cutter disc 3 during lifting, and mainly plays the role of connecting the ear seat 2 with the cutter disc 3; in addition, the latch member 5 does not bear the weight of the cutter disc 3 during lifting, so the locking pin 4 and the latch member 5 are both locking and unlocking components, the size can be reduced, and the structure is simple. When disassembling, first pull out the latch member 5, then rotate the cylindrical part 41 until the locking part 42 is vertically corresponding to the groove 22, unlock the ear seat 2, and then pull the convex ring part 21 of the ear seat 2 out of the connecting hole 31 to complete the disassembly. Among them, the ear seat 2 and the convex ring part 21, which are the main load-bearing parts, are fixed structures and can be welded or cast, while the movable parts that are mainly detachable are the latch part 5 and the lock pin 4, neither of which bears the weight of the cutter disc 3 during lifting. In other words, the fixed parts bear the weight and the movable parts play a connecting role. The load-bearing and connection are borne by different parts respectively, and the load-bearing capacity is strong. Secondly, even when the lifting ear is subjected to axial tension, for example, when the cutter disc 3 is turned over, the lifting ear needs to bear the axial tension along the cylindrical part 41, but the cylindrical part 41 and the lock pin 4 of the lock pin 4 that mainly bear the tension are also fixed structures with strong tensile strength. Compared with the tensile strength of the thread, it is also greatly improved, and the structure is more reliable. At the same time, the latch part 5 with a thin structure neither bears the bending moment nor the tensile force, and the overall structure of the lifting ear is reasonable and effective.

[0026] The exemplary shape of the lock pin 4 is that the convex ring portion 21 has an oblong profile, and the corresponding connecting hole 31 is an oblong hole; the groove 22 is an oblong groove, and the corresponding lock portion 42 is an oblong boss; the maximum distance between the two arc surfaces of the oblong boss is greater than the diameter of the oblong hole. Under the same principle, the convex ring portion 21 can also be a cross plum blossom shape, and the corresponding connecting hole 31 is a cross plum blossom hole. The shape of the corresponding groove 22 is similar to the cross plum blossom groove 22 of the head of a cross screw. As long as the lock head and the connecting hole 31 are misaligned after rotation, the locking effect can be achieved.

[0027] Preferably, the ear shaft 1 is detachably connected to one end of the ear seat 2. Exemplary detachability is achieved by threaded connection. It should be noted that the threaded connection does not bear the weight of the cutter head 3 during hanging, but is only required for connection, so it does not rely on threaded load-bearing.

[0028] An exemplary ear seat 2 structure, the ear seat 2 includes a bottom plate portion 24 and wing plate portions 25 fixedly connected to two opposite edges of the rear side surface of the bottom plate portion 24; the ear shaft 1 is connected to the ends of the two wing plate portions 25; the convex ring portion 21 is fixedly arranged on the front side surface of the bottom plate portion 24, and the circular hole 23 is opened in the bottom plate portion 24 at the center of the groove 22.

[0029] More preferably, the latch member 5 includes a pin shaft portion 51 inserted into the pin hole 43, the upper end of the pin shaft portion 51 is configured to overlap the platform portion 52 on the outer surface of the cylindrical portion 41, and the upper end of the platform portion 52 is provided with a pull ring portion 53. The pull ring portion 53 facilitates the pulling operation of the latch member 5, so that the latch member 5 can be quickly inserted and removed, and the platform portion 52 is larger than the pin hole 43, so as to prevent the latch member 5 from slipping out of the pin hole 43.

[0030] A further optimization is that the platform portion 52 is in the shape of a cuboid, the front side of the cuboid is in contact with the rear side of the bottom plate portion 24, and the left and right sides of the cuboid are respectively in contact with the inner sides of the two wing plate portions 25. At this time, the platform portion 52 is inserted between the pair of wing plate portions 25 and the bottom plate portion 24, controlling the rotation of the cylindrical portion 41, so that the locking portion 42 is fixed after locking, preventing the lock pin 4 from rotating and accidentally unlocking, and having higher reliability.

[0031] A further optimization is that the lower end surface of the platform portion 52 is set to a curved surface 54 corresponding to the cylindrical portion 41, so that when the platform portion 52 overlaps the outer surface of the cylindrical portion 41, the curved surface 54 fits with the outer side surface of the cylindrical portion 41. The combination area of ​​the platform portion 52 and the cylindrical portion 41 is larger, the latch member 5 is more stable, and it is prevented from falling off, which further improves reliability.

[0032] The advantages of this embodiment are:

[0033] (1) This device does not use threaded connections, can be quickly disassembled and assembled, and is easy to operate and highly efficient.

[0034] (2) The load-bearing components and connecting components of the device are separated, so the load-bearing capacity is strong, and the connecting components are non-load-bearing and have high reliability.

[0035] (3) The load-bearing components of the device are fixed structures with reasonable structure, sturdy appearance and high load-bearing capacity.

[0036] In summary, the device makes the lifting lug detachable for reuse while avoiding the use of bolt connections to ensure that the connection of the lifting lug is sufficiently firm, and the disassembly and assembly is quick and convenient, thereby improving the use efficiency.

[0037] The parts not described in detail in this utility model are prior art; for ordinary technicians in this field, the technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. The scope of this utility model is defined by the attached claims and their equivalents.

Claims

1. A detachable ear for a cutter head, comprising an ear shaft (1), wherein the ear shaft (1) is connected to one end of an ear seat (2); characterized in that: The other end of the ear seat (2) is fixedly provided with a convex ring portion (21) which is convex outward and has a groove (22) in the middle; the center of the groove (22) is provided with a circular hole (23) which passes through the ear seat (2); The convex ring portion (21) is inserted into a connection hole (31) preset on the outer ring of the cutter disc (3) and corresponding to the contour of the convex ring portion (21); It also includes a lock pin (4) having two ends, a cylindrical portion (41) and a lock portion (42); the middle portion of the cylindrical portion (41) is rotatably inserted into the circular hole (23); the ends of the cylindrical portion (41) and the lock portion (42) are respectively located outside the two end surfaces of the circular hole (23); The locking portion (42) can be embedded in the groove (22) in a vertical position, and the locking pin (4) can be abutted against the inner side wall of the outer ring of the cutter disc (3) at the connecting hole (31) when the locking portion (42) is rotated to a horizontal position, so that the locking pin (4) cannot be separated from the outer ring of the cutter disc (3); The latch member (5) is inserted into a pin hole (43) preset at the end of the cylindrical portion (41) and is used to connect the lock pin (4) to the ear seat (2) through the latch member (5) when the lock pin (4) cannot be detached from the connecting hole (31).

2. The detachable lifting lug of the cutter head according to claim 1, characterized in that: The convex ring portion (21) has an oblong profile, and the corresponding connecting hole (31) is an oblong hole; the groove (22) is an oblong groove, and the corresponding locking portion (42) is an oblong boss; the distance between the two arc surface vertices of the oblong boss is greater than the diameter of the oblong hole.

3. The detachable lifting lug of the cutter head according to claim 1, characterized in that: The ear shaft (1) is detachably connected to one end of the ear seat (2).

4. The detachable lifting lug of the cutter head according to claim 1, characterized in that: The ear seat (2) comprises a bottom plate portion (24) and wing plate portions (25) fixedly connected to two opposite edges of the rear side surface of the bottom plate portion (24); the ear shaft (1) is connected to the ends of the two wing plate portions (25); The convex ring portion (21) is fixedly arranged on the front side of the bottom plate portion (24), and the circular hole (23) is opened on the bottom plate portion (24) and is located at the center of the groove (22).

5. The detachable lifting lug of the cutter head according to claim 4, characterized in that: The latch member (5) comprises a pin shaft portion (51) inserted into the pin hole (43), the upper end of the pin shaft portion (51) being arranged as a platform portion (52) for overlapping the outer surface of the cylindrical portion (41), and the upper end of the platform portion (52) being provided with a pull ring portion (53).

6. The detachable lifting eye of the cutter head according to claim 5, characterized in that: The platform portion (52) is in the shape of a cuboid, the front side of the cuboid is fitted with the rear side of the bottom plate portion (24), and the left and right side surfaces of the cuboid are respectively fitted with the inner side surfaces of the two wing plate portions (25).

7. The detachable lifting eye of the cutter head according to claim 6, characterized in that: The lower end surface of the platform portion (52) is configured as a curved surface (54) corresponding to the cylindrical portion (41), so that when the platform portion (52) overlaps the outer surface of the cylindrical portion (41), the curved surface (54) fits with the outer side surface of the cylindrical portion (41).

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