CN217481276U

CN217481276U - Hob fixing mechanism

Info

Publication number: CN217481276U
Application number: CN202221557145.8U
Authority: CN
Inventors: 谢利阳; 刘力; 申亚飞; 王梦; 张辉; 成伟江; 李阳
Original assignee: China Railway Tunnel Stock Co Ltd; GDH Pearl River Water Supply Co Ltd
Current assignee: China Railway Tunnel Stock Co Ltd; GDH Pearl River Water Supply Co Ltd
Priority date: 2022-06-21
Filing date: 2022-06-21
Publication date: 2022-09-23
Anticipated expiration: 2032-06-21

Abstract

The utility model discloses a hob fixing mechanism, aiming at solving the technical problem that the shield machine is easy to loose and fall off in the hard rock geological tunneling process, which leads to construction obstruction; the mechanism comprises a knife box, a tensioning assembly, a hob and a clamping block, wherein the tensioning assembly, the hob and the clamping block are arranged in the knife box; a connecting bulge matched with the tensioning assembly and a tool apron matched and connected with the clamping block are arranged in the tool box, the hob is matched and connected with the clamping block, and the tensioning assembly comprises a wedge block, a pull rod and a tensioning block; the wedge block is abutted between the connecting protrusion and the hob, the tensioning block is abutted between the connecting protrusion and the tool apron, and the pull rod penetrates through the wedge block and the tensioning block; the utility model discloses can effectively prevent that the hobbing cutter of tunnelling in-process from droing, further promote the life and the tunnelling efficiency of cutter.

Description

Hob fixing mechanism

Technical Field

The utility model relates to a shield constructs quick-witted equipment technical field, concretely relates to hobbing cutter fixed establishment.

Background

In recent years, as socio-economic development continues, more and more rail transit projects are being carried out on a large scale in various places. At present, the tunneling technology of the shield machine in loess, silt soft soil, sand layers and sandy gravel strata is mature, a large number of structural design calculation theories and engineering practice systems are formed, but the tunneling experience of the shield machine in full-section hard rock strata with the rock strength of 120-150 MPa is shallow. For example, in the shield tunneling process of a hard rock stratum, cutter head and cutter loosening easily occurs due to cutter head vibration, and adverse phenomena such as shield machine shell clamping, spiral machine clamping, cutter head locking or serious cutter head abrasion easily occur, so that the shield tunneling construction is greatly influenced.

The inventor knows a straight line propelling type TBM single-blade hob fixing structure (application number is 201620989464.4), wherein: the left and right sides of a cushion block under a roller shaft are not fixed, the vibration of the roller cutter is transmitted to the cushion block in the process of tunneling a hard rock geological layer of the shield tunneling machine, when the cushion block displaces, a cushion block tensioning bolt bears shearing force, the cushion block tensioning bolt can be distorted and even broken under the condition of long-term accumulation, and the roller cutter can fall off in serious conditions; in addition, the phenomenon that the tension bolt is loosened due to vibration in the tunneling process is also one of the reasons for loosening or falling off of the hob. The counter measures in the prior art are that the shield tunneling machine is generally stopped and checked regularly, and then loose bolts are fastened, so that the construction labor amount is large, the tunneling efficiency of the shield tunneling machine is influenced, and the construction period is delayed.

The information disclosed in this background section is only for enhancement of understanding of the background of the disclosure and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.

Disclosure of Invention

In view of at least one of above technical problem, this disclosure provides a hobbing cutter fixed establishment, carries out spacing to the hobbing cutter through sword case internal connection arch and blade holder and wedge, taut piece quick-witted fixture block cooperation.

According to one aspect of the disclosure, a hob fixing mechanism is provided, which comprises a hob box, a tensioning assembly installed in the hob box, a hob and a fixture block; a connecting bulge matched with the tensioning component and a tool apron matched and connected with the clamping block are arranged in the tool box, the hob is matched and connected with the clamping block, and the tensioning component comprises a wedge block, a pull rod and a tensioning block; the wedge block is abutted between the connecting protrusion and the hob, the tensioning block is abutted between the connecting protrusion and the tool apron, and the pull rod penetrates through the wedge block and the tensioning block.

In some embodiments of the present disclosure, the wedge block and the tension block are respectively and correspondingly provided with a mounting hole, and the tension rod includes a tension bolt penetrating the mounting hole and a lock nut engaged with an end of the tension bolt.

In some embodiments of the present disclosure, the locking device further comprises a locking assembly, the locking assembly comprises a first locking buckle and a second locking buckle which have the same configuration and size specification, the first locking buckle and the second locking buckle are tightly attached to each other along the symmetry axis of the first locking buckle and the second locking buckle to form a combined buckle, and the combined buckle comprises a clamping groove and a limiting block; the clamping grooves are respectively matched with corresponding locking nuts, so that the locking nuts are limited in the clamping grooves.

In some embodiments of the disclosure, a sliding groove/rail is arranged on the tensioning block, and the limiting block is connected with the sliding rail/groove in a matching manner, so that the combined buckle is fixedly connected to the tensioning block.

In some embodiments of the present disclosure, the first locking buckle and the second locking buckle are respectively and correspondingly provided with a fixing hole, and a hexagon socket head cap screw is inserted into the fixing hole, so that the first locking buckle and the second locking buckle are tightly attached and connected to form a combined buckle.

In some embodiments of the disclosure, a clamp spring groove is arranged in the fixed hole along the radial direction of the fixed hole, and a clamp spring is arranged in the clamp spring groove and attached to the top of the hexagon socket head cap screw.

In some embodiments of the disclosure, the tool holder is provided with a connecting hole, the fixture block is provided with a threaded hole corresponding to the connecting hole, and a bolt is additionally arranged between the connecting hole and the threaded hole, so that the fixture block is fixedly connected to the tool holder.

One or more technical solutions provided in the embodiments of the present application have at least any one of the following technical effects or advantages:

1. set up connecting protrusion and blade holder so that taut subassembly and blade holder are spacing respectively between the two at the knife case inside, the hobbing cutter pivot is spacing by complete butt, has effectively solved among the prior art shield structure machine hobbing cutter easily not hard up, the technical problem who drops at hard rock geology tunnelling process, and then has guaranteed the security and the efficiency that the shield constructs the tunnelling, has promoted the life of hobbing cutter greatly.

2. At another spacing butt side of hobbing cutter, carry on spacingly through tie bolt and the tie nut to taut wedge, prevent to take place not hard up along tie bolt's axial direction at the tensioning nut of vibration in-process, lead to wedge not hard up and influence the fixed of hobbing cutter pivot, further guaranteed the fixed stability of hobbing cutter.

Drawings

Fig. 1 is a schematic structural diagram of a knife box in a hob fixing mechanism in an embodiment of the present application.

Fig. 2 is a schematic structural diagram of the hob fixing mechanism (without the hob box) in an embodiment of the present application.

Fig. 3 is a schematic cross-sectional structure diagram of the hob fixing mechanism in an embodiment of the present application.

FIG. 4 is a schematic view of the tension assembly in the hob fixing mechanism according to an embodiment of the present application.

In the above figures, 1, a knife box; 11. a connecting projection; 12. a tool apron; 2. a tension assembly; 21. a wedge block; 22. a tensioning block; 23. tightening the bolts; 24. tightening the nut; 3. hobbing cutters; 4. a clamping block; 5. a locking assembly; 51. a first locking buckle; 52. a second locking buckle; 53. a card slot; 54. and a limiting block.

Detailed Description

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", "clockwise", "counterclockwise", and the like are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. References in this application to "first," "second," etc. are used to distinguish between the objects described and not to have any sequential or technical meaning. The term "connected" and "coupled" when used in this application includes both direct and indirect connections (couplings), unless otherwise specified.

The embodiment of the application provides a hobbing cutter fixed establishment, has solved among the prior art hobbing cutter and has easily drove the technical problem who causes the damage to shield structure machine equipment.

For solving the problem that the hob falls off, the technical scheme in the embodiment of the application has the following general idea:

through corresponding connection protrusion and the blade holder of setting up in the inside both sides of cutter box for the fixture block is on the blade holder with hobbing cutter pivot cooperation back fixed connection, and it is spacing to further carry out the butt to the hobbing cutter pivot to set up the taut subassembly between connection protrusion and hobbing cutter pivot simultaneously, has solved the technical problem that the hobbing cutter easily drops in the blade disc tunnelling in-process.

On the other hand still be equipped with tensioning block and pull rod complex locking Assembly in the tensioning Assembly, locking Assembly includes two shapes, the unanimous locking buckle of size, and two locking buckles correspond the laminating and form a combination buckle structure, combination buckle structure both ends are equipped with the draw-in groove, the draw-in groove with tensioning nut in the pull rod cooperatees to be equipped with on the combination buckle with tensioning block complex stopper to make at the cutter head tunnelling in-process combination buckle can radially prevent that locking nut from taking place the displacement and leading to tensioning Assembly not hard up, further prevent to take place to drop with the hobbing cutter pivot of tensioning Assembly butt.

For better understanding of the technical solutions of the present application, the technical solutions will be described in detail below with reference to the drawings and specific embodiments.

Example one

The present example discloses a hob 3 fixing mechanism, which is shown in fig. 1 to 2, and comprises a hob case 1, a tensioning assembly 2 installed in the hob case 1, a hob 3 and a fixture block 4.

The cutter box 1 is used for limiting and fixing the hob 3 and is arranged on a cutter head of the shield machine; referring to fig. 1, a corresponding connecting protrusion 11 and a corresponding tool apron 12 are symmetrically and respectively arranged in the tool box 1 from top to bottom, and the connecting protrusion 11 and the tool apron 12 are correspondingly arranged, so that the tensioning assembly 2, the hob 3 and the fixture block 4 are correspondingly arranged between the two to form a limit for a rotating shaft of the hob 3, and the hob 3 is ensured not to fall off in a tunneling process; the tool apron 12 is of an L-shaped structure and used for limiting the fixture block 4, a connecting hole is formed in the tool apron 12, a threaded hole corresponding to the connecting hole is formed in the fixture block 4, and a bolt penetrates through the corresponding connecting hole and the threaded hole, so that the fixture block 4 can be detachably fixed on the tool apron 12.

The tensioning assembly 2 comprises a wedge block 21, a pull rod and a tensioning block 22; referring to fig. 2 to 3, the wedge block 21 abuts between the connecting protrusion 11 and the rotating shaft of the hob 3, and is used for abutting and limiting the part of the rotating shaft of the hob 3 which is not limited by the fixture block 4; the tensioning block 22 is abutted between the connecting bulge 11 and the tool apron 12 and used for limiting the wedge block 21 so that the tensioning block can be always abutted between the connecting bulge 11 and the rotating shaft of the hob 3; the pull rod comprises a tension bolt 23 and a tension nut 24, mounting holes are correspondingly formed in the wedge-shaped block 21 and the tension block 22 respectively, the tension bolt 23 penetrates through the corresponding mounting holes, one end of the tension bolt 23 is limited on the outer side of the wedge-shaped block 21, the other end of the tension bolt extends out of the outer side of the tension block 22, and the tension nut 24 is connected to the tension bolt 23 extending out of the outer side of the tension block 22.

The hob further comprises a locking assembly 5, referring to fig. 4, the locking assembly 5 comprises a first locking buckle 51 and a second locking buckle 52 which are identical in shape and size, and are attached to each other along the symmetrical axes of the first locking buckle and the second locking buckle to form a combined buckle, two ends of the combined buckle are provided with a clamping groove 53 and a limiting block 54, the clamping grooves 53 are correspondingly connected with the tensioning nut 24 in a matched manner, so that the tensioning nut 24 is completely limited in the clamping groove 53, and the wedge block 21 and the tensioning block 22 are prevented from being loosened due to nut loosening caused by vibration in the rotation process of the hob 3, and the rotating shaft of the hob 3 is prevented from loosening or even falling off; the tensioning block 22 is provided with a sliding groove matched with the limiting block 54, so that the combined buckle is fixedly arranged on the tensioning block 22, and the axial direction of the tensioning nut 24 is limited; correspond respectively on first locking buckle 51 and the second locking buckle 52 and be equipped with the fixed orifices hexagon socket head cap screw is worn to establish by the fixed orifices, makes first locking buckle 51 and the inseparable laminating of second locking buckle 52 are connected and are formed the combination buckle, are provided with the jump ring groove along its radial direction in the fixed orifices the jump ring inslot laminating is equipped with the jump ring at hexagon socket head cap screw top, prevents that hexagon socket head cap screw is not hard up to cause the separation of combination buckle.

Although preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made to the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present application and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A hob fixing mechanism is characterized by comprising a hob box, a tensioning assembly, a hob and a clamping block, wherein the tensioning assembly, the hob and the clamping block are installed in the hob box; a connecting bulge matched with the tensioning assembly and a tool apron matched and connected with the clamping block are arranged in the tool box, the hob is matched and connected with the clamping block, and the tensioning assembly comprises a wedge block, a pull rod and a tensioning block; the wedge block is abutted between the connecting protrusion and the hob, the tensioning block is abutted between the connecting protrusion and the tool apron, and the pull rod penetrates through the wedge block and the tensioning block.

2. The hob fixing mechanism according to claim 1, wherein the wedge block and the tension block are respectively provided with a corresponding mounting hole, and the tension rod includes a tension bolt inserted into the mounting hole and a locking nut engaged with an end of the tension bolt.

3. The hob fixing mechanism according to claim 2, further comprising a locking assembly, wherein the locking assembly includes a first locking buckle and a second locking buckle having the same configuration and dimension, the first locking buckle and the second locking buckle are closely attached along the symmetry axis of the first locking buckle and the second locking buckle to form a combined buckle, and the combined buckle includes a clamping groove and a limiting block; the clamping grooves are respectively matched with corresponding locking nuts, so that the locking nuts are limited in the clamping grooves.

4. The hob fixing mechanism according to claim 3, wherein the tightening block is provided with a sliding groove/rail, and the limiting block is connected with the sliding rail/groove in a matching manner, so that the combined buckle is fixedly connected to the tightening block.

5. The hob fixing mechanism according to claim 3, wherein the first locking buckle and the second locking buckle are respectively provided with a corresponding fixing hole, and a hexagon socket head cap screw is inserted into the fixing hole, so that the first locking buckle and the second locking buckle are tightly attached to form a combined buckle.

6. The hob fixing mechanism according to claim 5, wherein a clamp spring groove is provided in the fixing hole along a radial direction thereof, and a clamp spring is provided in the clamp spring groove and attached to a top of the hexagon socket head cap screw.

7. The hob fixing mechanism according to claim 1, wherein the hob base is provided with a connecting hole, the fixture block is provided with a threaded hole corresponding to the connecting hole, and a bolt is additionally provided between the connecting hole and the threaded hole, so that the fixture block is fixedly connected to the hob base.