Hob mounting structure of shield tunneling machine

Abstract

The utility model discloses a shield tunneling machine hob installation structure which comprises a hob box, a wedge block, a C-shaped block, a tensioning block and a tensioning screw rod, a hob shaft is installed on the hob box, and a hob is connected to the hob shaft. The wedge-shaped block is movably connected with the hob box, and the inclined face of the wedge-shaped block abuts against the hob shaft. A boss is arranged in the middle of the hob box, a tensioning channel of an up-down penetrating structure is arranged on one side of the boss, a C-shaped block is fixedly connected to the top end of the boss, an opening of the C-shaped block faces the tensioning channel, and a wedge-shaped block is arranged on the inner side of the top end of the tensioning channel. The hobbing cutter shaft is positioned in a space defined by the inclined surface of the wedge-shaped block and the opening of the C-shaped block; the tensioning block is connected to the bottom end of the tensioning channel in an embedded mode, the top end of the tensioning screw rod is connected with a limiting penetrating groove longitudinally penetrating through the wedge-shaped block in a clamped mode, the bottom end of the tensioning screw rod penetrates through the tensioning block and then is connected with the locking nut, and the anti-loosening mechanism is arranged on one side of the locking nut and connected with the hob box.

Description

Technical Field

[0001] The utility model relates to the field of shield machines, in particular to a shield machine roller cutter installation structure. Background Art

[0002] With the development of urban construction, the use of shield machines in urban rail transit construction is becoming more and more common. Shield machines have become indispensable equipment in tunnel engineering construction. The cutterhead is the most important functional part of the shield machine. The shield cutter installed on the cutterhead plays a vital role in tunnel excavation.

[0003] At present, the most widely used shield machine cutter box structure in municipal tunnel construction is the back-mounted type. This type of cutter box structure has a wide range of applications and can be applied to various complex geological conditions such as hard rock, soft soil, and pebbles. Patent No. ZL200810230054.1 discloses a shield machine cutter back-mounted self-positioning fixing device, which uses a wedge block to install and limit the cutter shaft of the cutter, and uses bolts to position the wedge block; however, during the construction of the shield machine, due to the complex geological conditions, when excavating in uneven strata, the cutter vibrates greatly, and frequent vibrations will cause the bolts for positioning the wedge block to loosen, resulting in the wedge block being unable to limit the cutter shaft of the cutter, so that the cutter installed on the cutter shaft cannot achieve excavation action, which has an adverse effect on the excavation construction of the shield machine, and it is necessary to improve it. Summary of the invention

[0004] The utility model aims to solve the above problems and provide a shield machine cutter installation structure which has a stable structure and is convenient to use.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] A shield machine cutter installation structure comprises a cutter box, a wedge block, a C-block, a tension block, and a tension screw. The cutter shaft is installed on the cutter box, and the cutter is connected to the cutter shaft. The wedge block is movably connected to the cutter box, and the inclined surface of the wedge block abuts against the cutter shaft. A boss is arranged in the middle of the cutter box, and a tension channel is arranged on one side of the boss to penetrate the structure from top to bottom. A C-block is fixedly connected to the top of the boss, and the opening of the C-block faces the tension channel. A wedge block is arranged on the inner side of the top of the tightening channel, and the inclined surface of the wedge block is arranged opposite to the opening of the C-shaped block; the hob cutter shaft is located in the enclosed space between the inclined surface of the wedge block and the opening of the C-shaped block; the tensioning block is embedded in the bottom end of the tightening channel, the top end of the tensioning screw is engaged with the limiting through groove that longitudinally penetrates the wedge block, the bottom end of the tensioning screw passes through the tensioning block and is connected with the locking nut, an anti-loosening mechanism is arranged on one side of the locking nut, and the anti-loosening mechanism is connected to the hob cutter box.

[0007] Furthermore, the hob cutter box includes a first positioning plate, a second positioning plate, and a reinforcement plate. The first positioning plate and the second positioning plate are symmetrically arranged and the bottom ends of both are welded to the cutter disc. The reinforcement plates are welded to the bottom ends of the opposite surfaces of the first positioning plate and the second positioning plate and are fixedly connected by the reinforcement plates. A boss is provided on one side of the first positioning plate, and a C-shaped block is fixedly connected to the boss by a first bolt. A positioning block is provided on one side of the second positioning plate, and a tensioning channel is formed between the positioning block and the boss.

[0008] Furthermore, the tensioning block is arranged at the bottom end of the tensioning channel, and the top end of the tensioning block is embedded in the inner side of the bottom end of the tensioning channel.

[0009] Furthermore, a first plane, a second plane and a third plane are arranged on the outer peripheral side wall of the hob cutter shaft, and the first plane is arranged perpendicular to the second plane; the opening of the C-shaped block is in a horizontal U-shape; when the hob cutter shaft is located in the enclosed space of the inclined surface of the wedge block and the opening of the C-shaped block, the first plane and the second plane are in contact with the inner wall of the opening of the C-shaped block respectively, and the third plane is in contact with the inclined surface of the wedge block.

[0010] Furthermore, a protective sleeve is threadedly connected to the bottom end of the tightening screw, and the protective sleeve abuts against the end surface of the locking nut.

[0011] Furthermore, a positioning gear ring is integrally formed on the outer periphery of the locking nut or the protective sleeve, and positioning teeth are arranged on the outer periphery of the positioning gear ring and are engaged with the anti-loosening mechanism through the positioning teeth.

[0012] Furthermore, the anti-loosening mechanism includes a fixed shaft, a caliper member, and a positioning assembly; the fixed shaft is fixedly connected to the reinforcement plate, the axial direction of the fixed shaft is consistent with the axial direction of the locking nut and the axes of the two are arranged flush, the caliper member is sleeved on the fixed shaft and the caliper member can rotate relative to the fixed shaft; the caliper member is in the shape of an arc plate with a flat port on one side, the flat port of the caliper member is arranged toward the positioning gear ring, the front side of the flat port of the caliper member is provided with a first limiting tooth, and the rear side of the flat port of the caliper member is provided with a second limiting tooth teeth; a first control groove and a second control groove are arranged on the circumferential outer side of the caliper member and are engaged and positioned with the first control groove or the second control groove through a positioning component arranged on one side of the caliper member; when the positioning component is engaged with the first control groove, the first limit tooth abuts against the front end of the outer periphery of the positioning gear ring and realizes the engagement and limiting effect of the first limit tooth and the positioning tooth; when the positioning component is engaged with the second control groove, the second limit tooth abuts against the rear end of the outer periphery of the positioning gear ring and realizes the engagement and limiting effect of the second limit tooth and the positioning tooth.

[0013] Furthermore, the positioning assembly includes a fixed sleeve and a movable sleeve, one end of the fixed sleeve is provided with a protrusion and is fixedly connected to the reinforcement plate through the protrusion, the axial direction of the fixed sleeve is arranged to intersect perpendicularly with the axial direction of the fixed shaft, the other end of the fixed sleeve is provided with a movable sleeve on the outer side and the movable sleeve can slide along the axial direction of the fixed sleeve, a spring is arranged between the fixed sleeve and the movable sleeve, and the movable sleeve is pushed to move toward the caliper part through the spring, the end of the movable sleeve close to the caliper part is arranged in an arc shape and the end head abuts and engages in the first control groove or the second control groove under the action of the spring.

[0014] Compared with the prior art, the utility model has the following advantages and positive effects: when the utility model is used, the C-block is firstly connected with the cutter box by bolts, and then the cutter shaft is placed in the opening of the C-block, and then the wedge block, the tensioning block and the locking nut are installed at the upper and lower ends of the tensioning channel, and finally the wedge block is moved downward by rotating the locking nut, and the cutter shaft is positioned and installed on the cutter box through the inclined surface of the wedge block and the opening of the C-block; it effectively realizes the positioning and installation operation of the cutter shaft and the cutter; and the utility model is designed with an anti-loosening mechanism on one side of the locking nut, so that the anti-loosening mechanism can position the locking nut to avoid the locking nut from loosening when the cutter vibrates, and ensures that the limiting structure of the wedge block on the cutter shaft is not affected, so that a stable connection structure is permanently maintained between the cutter shaft and the cutter box, which will not cause any influence on the tunneling operation of the shield machine, and brings convenience to the tunneling construction operation of the shield machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 for Figure 1 A magnified view of the structure at position A in the middle;

[0018] Figure 3 for Figure 1 A magnified view of the structure at position B in the middle;

[0019] Figure 4 The connection structure between the protective cover and the anti-loosening mechanism is viewed from above Figure 1 ;

[0020] Figure 5The connection structure between the protective cover and the anti-loosening mechanism is viewed from above Figure 2 ;

[0021] Figure 6 It is a structural schematic diagram of the caliper component. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work, any modifications, equivalent replacements, improvements, etc., should be included in the protection scope of the utility model.

[0023] like Figures 1 to 6 As shown, this embodiment discloses a shield machine cutter installation structure, including a cutter box, a wedge block 6, a C-shaped block 5, a tension block 7, and a tension screw 8. There are two sets of cutter boxes, and the two sets of cutter boxes are symmetrically arranged and installed on the cutter head of the shield machine. The two ends of the cutter shaft 9 are respectively installed on the two sets of cutter boxes. The cutter shaft 9 is connected to a cutter 10, and the cutter 10 is located between the two sets of cutter boxes.

[0024] The hob cutter box includes a first positioning plate 1, a second positioning plate 2, and a reinforcement plate 3. The first positioning plate 1 and the second positioning plate 2 are symmetrically arranged and the bottom ends of both are welded to the cutter disc. The reinforcement plate 3 is welded to the bottom ends of the opposite surfaces of the first positioning plate 1 and the second positioning plate 2 and is fixedly connected by the reinforcement plate 3. A boss 101 is arranged on one side of the first positioning plate 1, and a positioning block 201 is arranged on one side of the second positioning plate 2. A tensioning channel 4 with an upper and lower penetrating structure is formed between the positioning block 201 and the boss 101.

[0025] The upper end of the boss 101 is fixedly connected with a C-shaped block 5 by bolts, the opening of the C-shaped block 5 faces the tightening channel 4, a wedge block 6 is arranged inside the top of the tightening channel 4, and the inclined surface of the wedge block 6 is arranged opposite to the opening of the C-shaped block 5; the hob shaft 9 is located in the enclosed space between the inclined surface of the wedge block 6 and the opening of the C-shaped block 5;

[0026] A first plane 901, a second plane 902 and a third plane 903 are arranged on the outer peripheral side wall of the hob shaft 9, and the first plane 901 is perpendicular to the second plane 902; the opening of the C-shaped block 5 is in a horizontal U-shape; when the hob shaft 9 is located in the enclosed space of the inclined surface of the wedge block 6 and the opening of the C-shaped block 5, the first plane 901 and the second plane 902 are in contact with the inner wall of the opening of the C-shaped block 5 respectively, and the third plane 903 is in contact with the inclined surface of the wedge block 6.

[0027] The tensioning block 7 is located on the front side of the reinforcing plate 3. The tensioning block 7 is a variable diameter structure with a small outer diameter at the top and a large outer diameter at the bottom. The top of the tensioning block 7 is embedded in the inner side of the bottom end of the tensioning channel 4. The wedge block 6 is provided with a limiting through groove 601 which longitudinally penetrates the wedge block 6. The limiting through groove 601 is a variable diameter structure with a large inner diameter at the top and a small inner diameter at the bottom. The top end of the tensioning screw 8 is embedded in the inner side of the top of the limiting through groove 601 and limits the rotation of the tensioning screw 8. The bottom end of the tensioning screw 8 passes through the bottom end of the limiting through groove 601 and the longitudinal through hole set on the tensioning block 7 in turn, and then is locked with the tensioning screw 8. The nut 11 and the protective sleeve 12 are threadedly connected; the protective sleeve 12 is located at the bottom end of the tensioning screw 8 to prevent damage to the threaded structure on the tensioning screw 8 during excavation; the protective sleeve 12 is a reducing structure, and its end close to the locking nut 11 is sleeved on the outside of the locking nut 11 and protects the locking nut 11, and its end away from the locking nut 11 is a retracted structure and is threadedly connected to the tensioning screw 8. After the connection, the internal end wall of the reducing position of the protective sleeve 12 abuts against the end face of the locking nut 11 to achieve a locking effect on the locking nut 11.

[0028] After installation, the wedge block can be moved downward by tightening the locking nut. After movement, the inclined surface of the wedge block abuts against the third plane of the hob shaft, and the first plane and the second plane of the hob shaft abut against the inner wall of the opening of the C-shaped block, thereby achieving a stable installation effect of the hob shaft.

[0029] The outer circumference of the protective sleeve 12 is integrally formed with a positioning gear ring 1201 , and the outer circumference of the positioning gear ring 1201 is provided with positioning teeth 1202 and is engaged with an anti-loosening mechanism provided on the hob cutter box through the positioning teeth 1202 .

[0030] The anti-loosening mechanism includes a fixed shaft 14, a caliper 13, and a positioning assembly; the fixed shaft 14 is fixedly connected to the reinforcing plate 3 through a support plate 15, the axial direction of the fixed shaft 14 is consistent with the axial direction of the locking nut 11 and the axes of the two are arranged flush, the caliper 13 is sleeved on the fixed shaft 14 and the caliper 13 can rotate relative to the fixed shaft 14; the caliper 13 is in the shape of an arc plate with a flat port on one side, the flat port of the caliper 13 is arranged toward the positioning gear ring 1201, and the flat port of the caliper 13 is arranged A first limiting tooth 1301 is provided at the front side of the port, and a second limiting tooth 1302 is provided at the rear side of the plane port of the caliper member 13; a first position control groove 1303 and a second position control groove 1304 are provided at the outer side of the circumference of the caliper member 13, the first position control groove 1303 is provided close to the second limiting tooth 1302, and the second control groove 1304 is provided close to the first position limit tooth 1301; the positioning component is provided at one side of the caliper member 13 and is engaged with the first position control groove 1303 or the second position control groove 1304 for positioning;

[0031] The positioning assembly includes a fixed sleeve 17 and a movable sleeve 18. A protrusion 16 is provided at one end of the fixed sleeve 17 and is fixedly connected to the reinforcement plate 3 through the protrusion 16. The axial direction of the fixed sleeve 17 is perpendicular to the axial direction of the fixed shaft 14. A movable sleeve 18 is provided on the outer side of the other end of the fixed sleeve 17 and the movable sleeve 18 can slide along the axial direction of the fixed sleeve 17. A spring 19 is provided between the fixed sleeve 17 and the movable sleeve 18, and the movable sleeve 18 is pushed to move toward the caliper member 13 through the spring 19. The end of the movable sleeve 18 close to the caliper member 13 is arranged in an arc shape, and the end head abuts and engages in the first control groove 1303 or the second control groove 1304 under the action of the spring.

[0032] like Figure 4 As shown, when the end of the movable sleeve is embedded in the first control groove, the first limit tooth abuts against the front end of the outer periphery of the positioning gear ring and realizes the engagement and limiting effect of the first limit tooth and the positioning gear tooth; at this time, when the protective sleeve rotates counterclockwise, under the extrusion and expansion of the spring, the caliper part will shake clockwise, and the protective sleeve can rotate counterclockwise normally; when the protective sleeve rotates clockwise, the caliper part will produce a counterclockwise rotation and under this force, the positioning gear ring cannot rotate clockwise; that is, when the end of the movable sleeve is embedded in the first control groove, the protective sleeve can only rotate counterclockwise in one direction;

[0033] like Figure 5 As shown, when the end of the movable sleeve is embedded in the second control groove, the second limit tooth abuts against the rear end of the outer periphery of the positioning gear ring and realizes the engagement and limiting effect of the second limit tooth and the positioning gear tooth; at this time, when the protective sleeve rotates clockwise, under the extrusion and expansion of the spring, the caliper part will shake counterclockwise, and the protective sleeve can rotate clockwise normally; when the protective sleeve rotates counterclockwise, the caliper part will produce a clockwise rotation and under this force, the positioning gear ring cannot rotate counterclockwise; that is, when the end of the movable sleeve is embedded in the second control groove, the protective sleeve can only rotate in a clockwise direction;

[0034] To sum up, through the matching structural design of the positioning component and the first control groove and the second control groove, people can easily and quickly achieve the anti-loosening effect of the anti-loosening mechanism on the protective sleeve; when the assembly is completed, the anti-loosening mechanism prevents the protective sleeve from rotating in the loosening direction; when the hob needs to be replaced, the anti-loosening mechanism is adjusted so that the protective sleeve can rotate in the loosening direction to facilitate the disassembly and replacement of the hob; of course, if the protective sleeve structure used only protects the screw and is not installed on the outside of the locking nut, a positioning gear ring can be set on the outer periphery of the locking nut, so that the anti-loosening mechanism cooperates with the positioning gear ring on the locking nut to achieve the installation and positioning of the locking nut, which can also achieve the technical effect of preventing the locking nut from loosening.

[0035] When the utility model is in use, the C-block is firstly connected with the roller cutter box by bolts, and then the roller cutter shaft is placed in the opening of the C-block, and then the wedge block, the tensioning block and the locking nut are installed at the upper and lower ends of the tensioning channel, and finally the wedge block is moved downward by rotating the locking nut, and the roller cutter shaft is positioned and installed on the roller cutter box through the inclined surface of the wedge block and the opening of the C-block; it effectively realizes the positioning and installation operation of the roller cutter shaft and the roller cutter; and the utility model is designed with an anti-loosening mechanism on one side of the locking nut, so that the anti-loosening mechanism can position the locking nut to avoid the locking nut from loosening when the roller cutter vibrates, and ensures that the limiting structure of the wedge block on the roller cutter shaft is not affected, so that a stable connection structure is permanently maintained between the roller cutter shaft and the roller cutter box, which will not cause any influence on the excavation operation of the shield machine, and brings convenience to the excavation construction operation of the shield machine.

Claims

1. A shield machine cutter installation structure, comprising a cutter box and a wedge block, wherein the cutter shaft is installed on the cutter box, and the cutter shaft is connected to the cutter; the wedge block is movably connected to the cutter box and the inclined surface of the wedge block abuts against the cutter shaft; the characteristics are: The shield machine cutter installation structure also includes a C-block, a tensioning block, and a tensioning screw. A boss is provided in the middle of the cutter box, and a tensioning channel that penetrates the structure from top to bottom is provided on one side of the boss. A C-block is fixedly connected to the top of the boss, and the opening of the C-block faces the direction of the tensioning channel. A wedge block is provided on the inner side of the top of the tensioning channel, and the inclined surface of the wedge block is arranged opposite to the opening of the C-block; the cutter shaft is located in the enclosed space of the inclined surface of the wedge block and the opening of the C-block; the tensioning block is embedded in the bottom end of the tensioning channel, the top end of the tensioning screw is engaged with the limiting through groove that penetrates the wedge block longitudinally, and the bottom end of the tensioning screw is connected with the locking nut after passing through the tensioning block, and an anti-loosening mechanism is provided on one side of the locking nut, and the anti-loosening mechanism is connected to the cutter box.

2. The shield machine cutter installation structure according to claim 1, characterized in that: The hob cutter box includes a first positioning plate, a second positioning plate, and a reinforcement plate. The first positioning plate and the second positioning plate are symmetrically arranged and the bottom ends of both are welded to the cutter disc. The reinforcement plates are welded to the bottom ends of the opposite surfaces of the first positioning plate and the second positioning plate and are fixedly connected by the reinforcement plates. A boss is arranged on one side of the first positioning plate, and a C-shaped block is fixedly connected to the boss by a first bolt. A positioning block is arranged on one side of the second positioning plate, and a tensioning channel is formed between the positioning block and the boss.

3. The shield machine cutter installation structure according to claim 2, characterized in that: The tensioning block is arranged at the bottom end of the tensioning channel, and the top end of the tensioning block is embedded in the inner side of the bottom end of the tensioning channel.

4. The shield machine cutter installation structure according to claim 3, characterized in that: A first plane, a second plane and a third plane are arranged on the outer peripheral side wall of the hob cutter shaft, and the first plane is arranged perpendicular to the second plane; the opening of the C-shaped block is in a horizontal U-shape; when the hob cutter shaft is located in the enclosed space of the inclined surface of the wedge block and the opening of the C-shaped block, the first plane and the second plane are in contact with the inner wall of the opening of the C-shaped block respectively, and the third plane is in contact with the inclined surface of the wedge block.

5. The shield machine cutter installation structure according to claim 4, characterized in that: The bottom end of the tensioning screw is threadedly connected with a protective sleeve, and the protective sleeve abuts against the end surface of the locking nut.

6. The shield machine cutter installation structure according to claim 5, characterized in that: The outer circumference of the locking nut or the protective sleeve is integrally formed with a positioning gear ring, and the outer circumference of the positioning gear ring is provided with positioning teeth and is engaged with the anti-loosening mechanism through the positioning teeth.

7. The shield machine cutter installation structure according to claim 6, characterized in that: The anti-loosening mechanism comprises a fixed shaft, a caliper, and a positioning assembly; the fixed shaft is fixedly connected to the reinforcing plate, the axial direction of the fixed shaft is consistent with the axial direction of the locking nut and the axes of the two are arranged flush, the fixed shaft is sleeved with a caliper and the caliper can rotate relative to the fixed shaft; the caliper is in the shape of an arc plate with a flat port on one side, the flat port of the caliper is arranged toward the positioning gear ring, the front side of the flat port of the caliper is provided with a first limiting tooth, and the rear side of the flat port of the caliper is provided with a second limiting tooth; the caliper A first positioning groove and a second positioning groove are arranged on the circumferential outer side of the ruler member, and are engaged and positioned with the first positioning groove or the second positioning groove through a positioning component arranged on one side of the caliper member; when the positioning component is engaged with the first positioning groove, the first limiting tooth abuts against the front end of the outer periphery of the positioning gear ring and realizes the engaging and limiting effect of the first limiting tooth and the positioning tooth; when the positioning component is engaged with the second positioning groove, the second limiting tooth abuts against the rear end of the outer periphery of the positioning gear ring and realizes the engaging and limiting effect of the second limiting tooth and the positioning tooth.

8. The shield machine cutter installation structure according to claim 7, characterized in that: The positioning assembly includes a fixed sleeve and a movable sleeve. A protrusion is provided at one end of the fixed sleeve and is fixedly connected to the reinforcement plate through the protrusion. The axial direction of the fixed sleeve is perpendicular to the axial direction of the fixed shaft. A movable sleeve is provided on the outer side of the other end of the fixed sleeve and can slide along the axial direction of the fixed sleeve. A spring is provided between the fixed sleeve and the movable sleeve and the movable sleeve is pushed to move toward the caliper through the spring. The end of the movable sleeve close to the caliper is arranged in an arc shape and the end head abuts and engages in the first control groove or the second control groove under the action of the spring.

Images