Self-locking bolt protection structure for shield tunneling machine cutterhead

Abstract

The utility model discloses a self-locking type bolt protection structure for a shield tunneling machine cutterhead, which comprises a bolt protection cover device, a matched bolt and a dismounting claw, the bolt protection cover device comprises a bolt protection cover, a threaded cylindrical pin, ratchets and a spring, and the ratchets, the threaded cylindrical pin and the spring are arranged on the bolt protection cover; a clamping groove is formed in the threaded end of the matched bolt, the bolt protection cover device and the matched bolt are used in a matched mode, and a one-way locking state is achieved through matching of the ratchets and the clamping groove. And the bolt protection cover device and the matched bolt are unlocked through the dismounting claw. The one-way locking device can achieve a one-way locking state and cannot be detached in the locking state, so that the anti-loosening effect on the tensioned bolt and nut is achieved, and the risk that the bolt and nut fall off is avoided; the structure is simple, use and operation are convenient and reliability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to a self -locking bolt protection structure for shield machine cutter head belongs to shield machine risk prevention and control technical field. BACKGROUND

[0002] The super large size block splicing, cutter installation tensioning etc. on the shield machine cutter head all need to be fixed by bolt and nut tensioning, and the cutter will vibrate and impact in different degrees in the working process due to different geological conditions, causing the bolt and nut to vibrate and loosen, resulting in fastening function failure and even nut falling off etc. In order to prevent the nut from falling off during the shield machine advancing process, anti-loose nut, double nut etc. are usually used to prevent loosening, but the falling off still occurs in actual use, which brings great safety hidden danger to the shield machine operation. SUMMARY

[0003] The utility model solves the technical problem that exists in prior art, provides a self -locking bolt protection structure for shield machine cutter head, to improve the safety of shield machine operation process.

[0004] In order to solve the technical problem, the utility model provides a self -locking bolt protection structure for shield machine cutter head, including bolt protection cover device, matched bolt and dismounting claw, the bolt protection cover device includes bolt protection cover, threaded cylindrical pin, ratchet and spring, and the ratchet, threaded cylindrical pin and spring are arranged on the bolt protection cover, the matched bolt is provided with a clamping groove at a threaded end, the bolt protection cover device and matched bolt are used in pairs, and one-way locking state is realized by the cooperation of the ratchet and clamping groove, and the bolt protection cover device and matched bolt are unlocked by the dismounting claw.

[0005] The inside of the bolt protection cover is provided with a threaded hole, and the ratchet is fixed to the inside of the bolt protection cover by the threaded cylindrical pin through the threaded hole.

[0006] The ratchet and bolt protection cover are both provided with mounting holes, and the spring is installed between the ratchet and bolt protection cover for resetting after the ratchet rotates.

[0007] The dismounting claw is provided with three claws, the ratchet mounting place on the bolt protection cover is provided with three hole passages, when dismounting, the three claws of the dismounting claw are bent to enter the bolt protection cover through the hole passages, the ratchet is pushed to make it separate from the cooperation of the clamping groove of the matched bolt, the unlocking of the bolt protection cover device is realized, and the dismounting is carried out by using a wrench.

[0008] The dismounting claw is made of elastic steel.

[0009] Beneficial effects: the bolt protection cover device cooperates with the matched bolt for use, one-way locking state can be realized, the bolt protection cover device cannot be disassembled in the locking state, so that the bolt nut is prevented from being loosened, and the risk that the bolt nut falls off is avoided; when disassembling, the bolt protection cover device is unlocked by means of the dismounting claw tool, and after unlocking, the bolt protection cover device can be disassembled by reversely rotating the bolt protection cover device by using a wrench, the one-way locking self-locking bolt protection cover device is simple in structure, convenient to operate and high in reliability. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a combined schematic view of the utility model with a dismounting claw;

[0011] Figure 2 It is a combined schematic view of the utility model without a dismounting claw;

[0012] Figure 3 It is a schematic view of arrangement of components of the utility model;

[0013] Figure 4 It is a schematic view of structure of a matched bolt of the utility model;

[0014] Figure 5 It is a schematic view of structure of a dismounting claw of the utility model;

[0015] Figure 6 It is a schematic view of structure of a bolt protection cover of the utility model;

[0016] Figure 7 It is a schematic view of structure of a ratchet of the utility model;

[0017] Figure 8 It is a schematic view of structure of a threaded cylindrical pin of the utility model;

[0018] Figure 9 It is a schematic view of structure of a spring of the utility model;

[0019] Figure 10 It is a schematic view of structure of one-way locking state of the utility model;

[0020] Figure 11 It is a schematic view of structure of unlocking state of the utility model.

[0021] In the drawing: 1, bolt protection cover device; 2, matched bolt; 3, dismounting claw; 11, bolt protection cover; 12, threaded cylindrical pin; 13, ratchet; 14, spring; 111, threaded hole; 112, hole channel; 21, clamping groove. DETAILED DESCRIPTION

[0022] The utility model will be described in detail in combination with the drawings and examples.

[0023] AsFigures 1-11 The utility model provides a self -locking bolt protection structure for shield machine cutter head, including bolt protection cover device 1, matched bolt 2 and dismounting claw 3, bolt protection cover device 1 includes bolt protection cover 11, threaded cylindrical pin 12, ratchet 13 and spring 14, and ratchet 13, threaded cylindrical pin 12, spring 14 are placed on bolt protection cover 11, matched bolt 2 is provided with the clamping slot 21 at the threaded end, is used for the one -way locking of ratchet 13, bolt protection cover device 1 and matched bolt 2 are used in pairs, and one -way locking state is realized through the cooperation of ratchet 13 and clamping slot 21, plays bolt protection, nut anti -loosening function, and ratchet 13 plays the one -way locking function of bolt protection cover 11, and the unlocking of bolt protection cover device 1 and matched bolt 2 is realized through dismounting claw 3.

[0024] The inside of the bolt protection cover 11 is provided with a threaded hole 111, and the ratchet 13 is fixed to the inside of the bolt protection cover 11 by the threaded cylindrical pin 12 through the threaded hole 111.

[0025] The ratchet 13 and the bolt protection cover 11 are both provided with mounting holes, and the spring 14 is installed between the ratchet 13 and the bolt protection cover 11 for resetting after the ratchet 13 rotates.

[0026] The dismounting claw 3 is provided with three claws, and the ratchet 13 on the bolt protection cover 11 is provided with three hole passages 112, when dismounting, the three claws of the dismounting claw 3 bend through the hole passages 112 into the bolt protection cover 11, push the ratchet 13 to make it disengage from the cooperation with the clamping slot 21 of the matched bolt 2, realize the unlocking of the bolt protection cover device 1, use the wrench to dismount, and complete the dismounting operation.

[0027] The dismounting claw 3 is made of elastic steel, which is used to unlock the ratchet 13 when dismounting the bolt protection cover 11.

[0028] When the utility model is used, the bolt protection cover device 1 and the matched bolt 2 are fixed on the equipment through threads, when the equipment needs to be dismounted and repaired, the bolt protection cover device 1 needs to be unlocked by the dismounting claw 3 first, and then the bolt protection cover device 1 is dismounted by using the wrench to rotate it reversely in the unlocked state.

[0029] The bolt protection cover device is used in pairs with the matched bolt, which can realize one-way locking state, and the equipment cannot be dismounted in the locked state, so that the bolt and nut are prevented from loosening, and the risk of falling off of the bolt and nut is avoided; when dismounting, the bolt protection cover device is unlocked by the dismounting claw tool, and the dismounting operation can be realized by using the wrench to rotate the bolt protection cover device reversely after unlocking, and the self-locking bolt protection cover device with one-way locking has the advantages of simple structure, convenient operation and high reliability.

[0030] The utility model discloses on the original bolt protection cover integration realizes, through increasing the ratchet structure, with the matched bolt cooperation uses, realizes the self -lock of bolt protection cover, indirectly prevents the risk of nut loosening and even falling off, the utility model discloses need not increase other structure or measure can solve the problem of nut loosening and even falling off, and the operation and dismounting are simple and easy,

[0031] The above-mentioned embodiments of the utility model are only illustrative, not the only ones, and all changes within the scope of the utility model or equivalent to the scope of the utility model are encompassed by the utility model.

Claims

1. A self-locking bolt protection structure for a shield machine cutterhead, characterized by: The invention comprises a bolt protection cover device (1), a matching bolt (2) and a disassembly claw (3); the bolt protection cover device (1) comprises a bolt protection cover (11), a threaded cylindrical pin (12), a ratchet (13) and a spring (14); the ratchet (13), the threaded cylindrical pin (12) and the spring (14) are arranged on the bolt protection cover (11); the matching bolt (2) is provided with a clamping groove (21) at one end of the thread; the bolt protection cover device (1) and the matching bolt (2) are used in pairs, and a one-way locking state is achieved by the ratchet (13) cooperating with the clamping groove (21); and the bolt protection cover device (1) and the matching bolt (2) are unlocked by the disassembly claw (3).

2. The self-locking bolt protection structure for the shield machine cutter head according to claim 1, characterized in that: A threaded hole (111) is provided on the inner side of the bolt protection cover (11), and the ratchet (13) is fixed to the inner side of the bolt protection cover through the threaded hole (111) using a threaded cylindrical pin (12).

3. The self-locking bolt protection structure for the shield machine cutter head according to claim 1, characterized in that: The ratchet (13) and the bolt protection cover are both provided with mounting holes, and the spring (14) is installed between the ratchet (13) and the bolt protection cover (11) and is used for resetting the ratchet (13) after rotation.

4. The self-locking bolt protection structure for a shield machine cutterhead according to claim 1, characterized in that: The disassembly claw (3) is provided with three claws, and the mounting position of the ratchet (13) on the bolt protection cover (11) is provided with three hole channels (112). When disassembling, the three claws of the disassembly claw (3) are bent through the hole channels (112) to enter the bolt protection cover (11), and push the ratchet (13) to disengage the ratchet (13) from the engagement with the slot (21) of the matching bolt (2), thereby unlocking the bolt protection cover device (1) and disassembling with a wrench.

5. The self-locking bolt protection structure for a shield machine cutter head according to any one of claims 1 to 4, characterized in that: The disassembly claw (3) is made of elastic steel.

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