Detachable cone fixing structure of shield tunneling machine hob seat

Abstract

The utility model relates to the field of shield tunneling machines, in particular to a detachable cone fixing structure of a shield tunneling machine hob seat, which comprises a mounting hole, a fixing wall, a fastening component, an abutting component and a wedge-shaped pressing component. Positioning assemblies are arranged at the ends, close to the front shield, of the mounting holes; the fastening assembly comprises a wedge-shaped strip; the large ends of the wedge-shaped strips face the front shield and are inserted into the fixing grooves, tight and gapless contact between the hob seat body and the hob box is achieved, vibration generated by installation gaps of the hob seat body in the hob box during tunneling is eliminated, the hob seat body is fastened to the positioning assembly through the wedge-shaped pressing assembly, and low pressure is provided for the abutting assembly. The wedge-shaped strip and the hob seat body are always kept in an extrusion state, and meanwhile, the hob seat body and the hob box are not loosened, so that the stability of the hob seat body on a cutter head is ensured.

Description

Technical Field

[0001] The utility model relates to the field of shield machines, in particular to a detachable cone fixing structure of a hob seat of a shield machine. Background Art

[0002] The cutterhead of the shield machine is equipped with a cutter, which is installed in a cutter seat, and the cutter seat is installed in the cutter box hole of the cutterhead. The force borne by the cutter during excavation is transmitted to the cutter box hole of the cutterhead through the cutter seat, and finally the cutterhead bears all the rock breaking force. Usually, the cutter seat is installed into the cutterhead from one side of the cutting surface of the shield machine. The cutter seat is fixed in the cutter box of the cutterhead by welding. When replacing the cutter, you only need to remove the wedge pressing and fixing bolts of the cutter shaft. Some cutters are replaced from the face side, and some are replaced from the space between the cutterhead and the front shield. The method of replacing the cutter in the space between the cutterhead and the face has certain safety factors. Usually, the cutter seat and the cutter box of the cutterhead are welded together. When the wedge groove that fixes the cutter shaft on the cutter seat is worn or deformed, the cutter seat must be replaced. Because the cutter seat is welded to the cutterhead, it takes a long time to cut the weld to replace the cutter seat. With the rapid development and application of intelligent cutter discs and real-time dynamic parameter detection technologies for hobs, the maintenance and replacement of signal sensors installed inside the hob seat require the hob seat to be removed from the cutter disc before the target work can be carried out.

[0003] During the assembly and disassembly process, there is a small gap between the contact surface of most existing cutter seats and cutter boxes. When the cutter seat is installed in the cutter box, the two are welded together at the outer end. The small gap of the fixed cutter seat will produce slight vibration when the cutter breaks the rock, which is an additional interference factor for the accuracy of the sensor data; secondly, it takes a long time to cut the solid weld when replacing the cutter seat, which affects the operation time. Utility Model Content

[0004] The utility model provides a detachable cone fixing structure of a shield machine cutter seat to solve the above problem.

[0005] The utility model discloses a detachable cone fixing structure of a shield machine cutter seat, which adopts the following technical scheme: a detachable cone fixing structure of a shield machine cutter seat, comprising a mounting hole, a fixing wall, a fastening assembly, a pressing assembly, and a wedge-shaped pressing assembly; the mounting hole is a rectangular hole, which is arranged on the cutter box; the mounting hole is a through hole, one of which faces the face, and the other faces the front shield of the shield machine; the cutter seat body is installed in the mounting hole; two fixing walls are provided, which are two adjacent side walls of the cutter seat body, and the remaining two side walls of the cutter seat body are set as positioning walls; the fixing wall cross section is wedge-shaped; the fixing wall and the hole wall corresponding to the mounting hole surround a wedge-shaped fixing groove; the large end of the fixing groove faces the front shield;

[0006] A positioning assembly is provided at one end of the mounting hole close to the front shield; the positioning assembly is used to limit the distance between the cutter body and the rock surface of the tunnel through the cutter seat body, and adjust the front and rear position of the cutter according to the wear of the cutter diameter, so as to reduce the accelerated wear of individual cutters or damage to the cutter guide ring due to excessive pressure when the cutter ring is squeezed with the rock surface of the tunnel due to the wear of the cutter diameter, thereby extending the service life of the cutter and reducing the cost of using the cutter;

[0007] The fastening assembly includes a wedge-shaped strip; the wedge-shaped strip is matched with the fixing groove; the large end of the wedge-shaped strip is inserted into the fixing groove toward the front shield, so as to achieve close and gapless contact between the cutter seat body and the cutter box, thereby eliminating the vibration of the cutter seat body in the cutter box due to the installation gap during excavation;

[0008] The pressing assembly is arranged in the fixing groove and is located on the side of the wedge bar close to the front shield, and is used to provide pressing force to the wedge bar in the direction of the face to prevent the wedge bar from loosening;

[0009] The wedge-shaped pressing assembly is arranged at the opening of the mounting hole toward the front shield, and is used to fasten the cutter seat body to the positioning assembly and provide a pressing force for the pressing assembly, so that the wedge-shaped strip and the cutter seat body are always kept in a squeezed state, and at the same time, the cutter seat body and the cutter box are not loose, thereby ensuring the stability of the cutter seat body on the cutter disc.

[0010] Furthermore, the positioning assembly includes a positioning ring groove and a positioning boss; the positioning ring groove is rectangular and is provided on the hole wall of the mounting hole facing the front shield; the positioning boss is fixed to one end of the positioning wall close to the front shield; the positioning ring groove and the positioning boss are engaged in a blocking manner. When the hob cutter seat body is installed into the mounting hole of the hob cutter box of the cutter disc from the driving side of the cutter disc, the positioning boss is stuck in the positioning ring groove to position the hob cutter seat body in the hob cutter box.

[0011] Furthermore, the pressing assembly includes two pressing strips; the pressing strips are triangular wedge-shaped; one side wall of the pressing strip overlaps with the side wall corresponding to the other pressing strip, and the remaining two side walls of the pressing strip are respectively arranged in parallel with the side wall corresponding to the other pressing strip, so that the two pressing strips constitute a gasket structure with two parallel side walls. The thickness of the gasket structure is adjusted by moving the two pressing strips away from or close to each other along the overlapping side walls of the two pressing strips, so that the thickness of the gasket structure is equal to the distance from the large end of the wedge-shaped strip to the end edge of the hob seat close to the front shield.

[0012] Furthermore, the two pressing strips are fastened by screws.

[0013] Furthermore, an auxiliary pad is abutted on the side wall of the pressure strip close to the front shield; the auxiliary pad is an elastic pad.

[0014] Furthermore, the wedge-shaped clamping assembly includes a clamping ring groove, an outer pressure strip, and an inner pressure strip; the clamping ring groove is rectangular and is opened on the groove wall of the positioning ring groove facing the front shield; there are two outer pressure strips, distributed on both sides of the hob body; the outer pressure strip is arranged on the side of the hob seat body close to the front shield; the side wall of the outer pressure strip close to the hob body is a wedge-shaped wall; the two outer pressure strips form a "V"-shaped groove with the small end facing the hob body; the outer pressure strip is pressed against the hob seat body and the auxiliary pad; the inner pressure strip is arranged between the two outer pressure strips, the side wall of the inner pressure strip close to the outer pressure strip is a wedge-shaped wall, and the inner pressure strip is a trapezoid with the small end facing the hob body; the inner pressure strip and the hob box are locked and matched by a locking assembly. During installation, first insert one end of the outer pressure strip into the clamping ring groove and press it against the hob seat body and the auxiliary pad, then drive the inner pressure strip toward the hob body through the locking assembly, and fasten the hob seat body to the positioning ring groove through the wedge-shaped locking fit, and provide a pressing force for the pressure strip, so that the wedge-shaped strip and the hob seat body are always kept in an extruded state, while ensuring that there is no looseness between the hob seat body and the hob box, thereby ensuring the stability of the hob seat body on the cutter disc.

[0015] Furthermore, the groove wall of the clamping ring groove close to the front shield is a wedge-shaped wall, with the large end facing the hob body; one end of the outer pressure strip close to the wedge-shaped wall of the clamping ring groove is wedge-shaped, which is used to cooperate with the inner pressure strip to lock and press the hob seat body onto the hob box through the outer pressure strip.

[0016] Furthermore, the locking assembly is a screw, and the inner pressure strip is fixed to the hob box by the screw.

[0017] Furthermore, an adjustment strip is provided in the positioning ring groove; the adjustment strip abuts against the positioning boss; and the adjustment strip is replaceable. It is used to replace a suitable adjustment strip according to the wear of the roller cutter diameter to adjust the front and rear positions of the roller cutter, so as to reduce the accelerated wear of individual roller cutters or damage to the roller cutter guide ring due to excessive pressure when the roller cutter ring is squeezed with the rock surface of the excavated cave due to the wear of the roller cutter diameter, thereby extending the service life of the roller cutter and reducing the cost of using the tool.

[0018] Furthermore, the width of the inner bead is greater than the width of the outer bead.

[0019] The beneficial effects of the utility model are as follows: when installing the cutter seat body, first install the cutter seat body into the installation hole of the cutter box of the cutter disc from the driving side of the cutter disc, the positioning boss is stuck in the positioning ring groove, the cutter seat body is positioned in the cutter box, and the large end of the wedge strip is inserted into the fixing groove toward the front shield, so as to achieve close and gapless contact between the cutter seat body and the cutter box, eliminate the vibration of the cutter seat body in the cutter box due to the installation gap during excavation, and the wedge-shaped clamping assembly fastens the cutter seat body to the positioning assembly and provides a pressing force for the pressing assembly. The wedge strip and the cutter seat body are always kept in an extruded state, and at the same time, it is ensured that there is no looseness between the cutter seat body and the cutter box, thereby ensuring the stability of the cutter seat body on the cutter disc. Similarly, when the cutter seat body needs to be disassembled, the cutter seat body can be easily removed from the cutter box in the opposite order of installing the cutter seat body, and the disassembly of the conical cutter seat is completed, which is simple and fast, and improves efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] Figure 1 It is a schematic diagram of the distribution of the cutter head body on the cutter head of an embodiment of a detachable cone fixing structure of a cutter head of a shield machine according to the utility model;

[0022] Figure 2 It is a cross-sectional view of an embodiment of a detachable cone fixing structure of a shield machine cutter seat of the utility model;

[0023] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0024] Figure 4 for Figure 2 The enlarged view of point B in the middle;

[0025] Figure 5 It is a cross-sectional view from another angle of an embodiment of a detachable cone fixing structure of a shield machine cutter seat of the utility model;

[0026] Figure 6 It is a schematic diagram of a wedge-shaped clamping assembly of an embodiment of a detachable cone fixing structure of a shield machine cutter seat of the utility model;

[0027] Figure 7 It is a schematic diagram of a pressing assembly of an embodiment of a detachable cone fixing structure of a shield machine cutter seat of the utility model.

[0028] In the figure: 100, cutter disc; 200, hob box; 210, hob body; 300, hob seat body; 310, fixed wall; 320, positioning wall; 400, wedge strip; 510, positioning ring groove; 520, positioning boss; 530, adjustment strip; 610, pressure strip; 620, auxiliary pad; 710, clamping ring groove; 720, outer pressure strip; 730, inner pressure strip. DETAILED DESCRIPTION

[0029] The embodiments of the utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and should not be construed as limiting the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the utility model.

[0030] The features of the terms "first" and "second" in the specification and claims of the utility model may explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0031] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] An embodiment of a detachable cone fixing structure of a shield machine cutter seat according to the utility model is as follows: Figures 1 to 7As shown: a detachable cone fixing structure of a shield machine cutter seat, comprising a mounting hole, a fixing wall 310, a fastening assembly, a pressing assembly, and a wedge-shaped pressing assembly; the mounting hole is a rectangular hole, which is opened on the cutter box 200; the mounting hole is a through hole, one of which faces the tunnel face, and the other faces the front shield of the shield machine; the cutter seat body 300 is installed in the mounting hole; there are two fixing walls 310, which are two adjacent side walls of the cutter seat body 300, and the remaining two side walls of the cutter seat body 300 are set as positioning walls 320; the cross section of the fixing wall 310 is wedge-shaped; the fixing wall 310 and the hole wall corresponding to the mounting hole form a wedge-shaped fixing groove; the large end of the fixing groove faces the front shield;

[0034] A positioning assembly is provided at one end of the mounting hole close to the front shield; the positioning assembly is used to limit the position of the cutter body 210 from the rock surface of the tunnel through the cutter seat body 300, and adjust the front and rear position of the cutter according to the wear of the cutter diameter, so as to reduce the accelerated wear of individual cutters or damage to the cutter guide ring due to excessive pressure when the cutter ring is squeezed with the rock surface of the tunnel due to the wear of the cutter diameter, thereby extending the service life of the cutter and reducing the cost of using the tool.

[0035] The positioning assembly includes a positioning annular groove 510 and a positioning boss 520; the positioning annular groove 510 is rectangular and is provided on the hole wall of the mounting hole facing the front shield; the positioning boss 520 is fixed to the end of the positioning wall 320 close to the front shield; the positioning annular groove 510 and the positioning boss 520 are engaged in a blocking manner. When the hob seat body 300 is installed into the mounting hole of the hob box 200 of the cutter disc 100 from the driving side of the cutter disc 100, the positioning boss 520 is stuck in the positioning annular groove 510 to position the hob seat body 300 in the hob box 200. An adjustment bar 530 is provided in the positioning annular groove 510; the adjustment bar 530 abuts against the positioning boss 520; the adjustment bar 530 can be replaced. It is used to replace the appropriate adjustment strip 530 according to the wear of the cutter diameter to adjust the front and rear position of the cutter, so as to reduce the accelerated wear of individual cutters or damage to the cutter guide ring due to excessive pressure when the cutter ring is squeezed with the rock surface of the tunnel due to the wear of the cutter diameter, thereby extending the service life of the cutter and reducing the cost of using the tool.

[0036] The fastening assembly includes a wedge strip 400; the wedge strip 400 is matched with the fixing groove; the large end of the wedge strip 400 is inserted into the fixing groove toward the front shield, so as to achieve close and gapless contact between the cutter seat body 300 and the cutter box 200, thereby eliminating the vibration of the cutter seat body 300 in the cutter box 200 due to the installation gap during excavation;

[0037] The pressing assembly is arranged in the fixing groove and is located on the side of the wedge strip 400 close to the front shield, and is used to provide a pressing force to the wedge strip 400 in the direction of the palm face to prevent the wedge strip 400 from loosening; the pressing assembly includes two pressing strips 610; the pressing strips 610 are triangular wedge-shaped; one of the side walls of the pressing strip 610 overlaps with the side wall corresponding to the other pressing strip 610, and the remaining two side walls of the pressing strip 610 are respectively arranged in parallel with the side walls corresponding to the other pressing strip 610, so that the two pressing strips 610 constitute a gasket structure with two parallel side walls. The two pressing strips 610 are fastened by screws. An auxiliary pad 620 is abutted on the side wall of the pressing strip 610 close to the front shield; the auxiliary pad 620 is an elastic pad. The thickness of the gasket structure is adjusted by moving the two pressing strips 610 away from or closer to each other along the overlapping side walls of the two pressing strips 610, so that the thickness of the gasket structure is equal to the distance from the large end of the wedge strip 400 to the end edge of the hob seat close to the front shield.

[0038] The wedge-shaped clamping assembly is arranged at the opening of the mounting hole toward the front shield, and is used to fasten the cutter seat body 300 to the positioning assembly and provide a pressing force for the pressing assembly. The wedge-shaped strip 400 and the cutter seat body 300 are always kept in an extruded state, while ensuring that there is no looseness between the cutter seat body 300 and the cutter box 200, thereby ensuring the stability of the cutter seat body 300 on the cutter disc 100. This solution does not require welding when installing the cutter seat body 300. When the cutter seat body 300 and the cutter box 200 are no longer welded, the cutter seat body 300, which is not limited by welding performance, has a wider range of choices in materials and heat treatment, and its service life, wear resistance, and anti-deformation ability will have a lot of room for improvement.

[0039] The wedge-shaped clamping assembly includes a clamping ring groove 710, an outer pressure strip 720, and an inner pressure strip 730; the clamping ring groove 710 is rectangular and is provided on the groove wall of the positioning ring groove 510 facing the front shield; the groove wall of the clamping ring groove 710 close to the front shield is a wedge-shaped wall with the large end facing the hob body 210; one end of the outer pressure strip 720 close to the wedge-shaped wall of the clamping ring groove 710 is wedge-shaped. It is used to cooperate with the inner pressure strip 730 to lock and clamp the hob seat body 300 on the hob box 200 through the outer pressure strip 720.

[0040] There are two outer beading strips 720, which are distributed on both sides of the hob body 210; the outer beading strips 720 are arranged on the side of the hob seat body 300 close to the front shield; the side wall of the outer beading strip 720 close to the hob body 210 is a wedge-shaped wall; the two outer beading strips 720 surround a "V"-shaped groove with the small end facing the hob body 210; the outer beading strip 720 presses against the hob seat body 300 and the auxiliary pad 620; the inner beading strip 730 is arranged between the two outer beading strips 720, the side wall of the inner beading strip 730 close to the outer beading strip 720 is a wedge-shaped wall, and the inner beading strip 730 is a trapezoid with the small end facing the hob body 210; the width of the inner beading strip 730 is greater than the width of the outer beading strip 720. The inner beading strip 730 and the hob box 200 are locked and matched by a locking component. The locking component is a screw. The inner beading strip 730 is fixed to the hob box 200 by screws. During installation, first insert one end of the outer pressure strip 720 into the clamping ring groove 710 and press against the hob seat body 300 and the auxiliary pad 620, then drive the inner pressure strip 730 toward the hob body 210 through the locking assembly, and through the wedge-shaped locking cooperation, fasten the hob seat body 300 to the positioning ring groove 510, and provide a pressing force for the pressing strip 610, so that the wedge strip 400 and the hob seat body 300 are always kept in an extruded state, and at the same time, ensure that there is no looseness between the hob seat body 300 and the hob box 200, thereby ensuring the stability of the hob seat body 300 on the cutter disc 100.

[0041] In combination with the above embodiments, the use principle and working process of the utility model are as follows: when installing the cutter seat body 300, first install the cutter seat body 300 into the mounting hole of the cutter box 200 of the cutter disc 100 from the driving side of the cutter disc 100, the positioning boss 520 is stuck in the positioning ring groove 510, and the cutter seat body 300 is positioned in the cutter box 200. The large end of the wedge strip 400 is inserted into the fixing groove toward the front shield, so as to achieve close and gap-free contact between the cutter seat body 300 and the cutter box 200, thereby eliminating the vibration of the cutter seat body 300 in the cutter box 200 due to the installation gap during excavation.

[0042] Then, one end of the outer pressure strip 720 is first inserted into the clamping ring groove 710 and pressed against the cutter seat body 300 and the auxiliary pad 620, and then the inner pressure strip 730 is driven to approach the cutter body 210 through the locking assembly, and the cutter seat body 300 is fastened to the positioning ring groove 510 through the wedge-shaped locking fit, and a pressing force is provided for the pressing strip 610, so that the wedge strip 400 and the cutter seat body 300 are always kept in an extruded state, and at the same time, it is ensured that there is no looseness between the cutter seat body 300 and the cutter box 200, thereby ensuring the stability of the cutter seat body 300 on the cutter disc 100. Similarly, when the cutter seat body 300 needs to be disassembled, the cutter seat body 300 can be easily removed from the cutter box 200 in the reverse order of installing the cutter seat body 300, and the disassembly of the conical cutter seat is completed, which is simple and quick.

[0043] In addition, according to the wear of the cutter diameter, a suitable adjustment strip 530 is replaced to adjust the front and rear position of the cutter to reduce the accelerated wear of individual cutters or damage to the cutter guide ring due to excessive pressure when the cutter ring is squeezed with the rock surface of the tunnel due to the wear of the cutter diameter, thereby extending the service life of the cutter and reducing the cost of using the tool.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A detachable cone fixing structure of a shield machine cutter seat, characterized in that: It includes a mounting hole, a fixed wall, a fastening component, a pressing component, and a wedge-shaped pressing component; the mounting hole is a rectangular hole, which is opened on the hob box; the mounting hole is a through hole, one of which faces the palm face, and the other faces the front shield; the hob seat body is installed in the mounting hole; there are two fixed walls, which are two adjacent side walls of the hob seat body, and the remaining two side walls of the hob seat body are set as positioning walls; the cross section of the fixed wall is wedge-shaped; the fixed wall and the hole wall corresponding to the mounting hole surround a wedge-shaped fixed groove; the large end of the fixed groove faces the front shield; A positioning assembly is provided at one end of the mounting hole close to the front shield; the positioning assembly is used to limit the distance between the hob body and the rock surface of the cave through the hob seat body, and to adjust the front and rear position of the hob according to the wear of the hob diameter; The fastening assembly includes a wedge-shaped strip; the wedge-shaped strip is matched with the fixing groove; the large end of the wedge-shaped strip is inserted into the fixing groove toward the front shield to achieve close contact between the hob seat body and the hob box; The pressing assembly is arranged in the fixing groove and is located on the side of the wedge bar close to the front shield, and is used to provide pressing force to the wedge bar in the direction of the face to prevent the wedge bar from loosening; The wedge-shaped pressing component is arranged at the opening of the mounting hole facing the front shield, and is used to fasten the hob seat body to the positioning component and provide a pressing force for the pressing component.

2. The detachable cone fixing structure of the shield machine cutter seat according to claim 1 is characterized in that: The positioning assembly includes a positioning ring groove and a positioning boss; the positioning ring groove is rectangular and is arranged on the hole wall of the mounting hole facing the front shield; the positioning boss is fixed to one end of the positioning wall close to the front shield; the positioning ring groove and the positioning boss are stop-matched.

3. The detachable cone fixing structure of the shield machine cutter seat according to claim 2 is characterized in that: The pressing assembly includes two pressing strips; the pressing strips are triangular wedge-shaped; one of the side walls of the pressing strips overlaps with the corresponding side wall of the other pressing strip, and the remaining two side walls of the pressing strip are respectively arranged parallel to the corresponding side walls of the other pressing strip, so that the two pressing strips constitute a gasket structure with two parallel side walls.

4. The detachable cone fixing structure of the shield machine cutter seat according to claim 3 is characterized in that: The two pressure strips are fastened by screws.

5. The detachable cone fixing structure of the shield machine cutter seat according to claim 4 is characterized in that: An auxiliary pad is abutted on the side wall of the pressure strip close to the front shield; the auxiliary pad is an elastic pad.

6. The detachable cone fixing structure of the shield machine cutter seat according to claim 5 is characterized in that: The wedge-shaped clamping assembly includes a clamping ring groove, an outer pressure strip, and an inner pressure strip; the clamping ring groove is rectangular and is opened on the groove wall of the positioning ring groove facing the front shield; there are two outer pressure strips, which are distributed on both sides of the hob body; the outer pressure strip is arranged on the side of the hob seat body close to the front shield; the side wall of the outer pressure strip close to the hob body is a wedge-shaped wall; the two outer pressure strips form a "V"-shaped groove with the small end facing the hob body; the outer pressure strip presses against the hob seat body and the auxiliary pad; the inner pressure strip is arranged between the two outer pressure strips, the side wall of the inner pressure strip close to the outer pressure strip is a wedge-shaped wall, and the inner pressure strip is a trapezoid with the small end facing the hob body; the inner pressure strip and the hob box are locked and matched by a locking assembly.

7. The detachable cone fixing structure of the shield machine cutter seat according to claim 6 is characterized in that: The groove wall of the clamping ring groove close to the front shield is a wedge-shaped wall, with the large end facing the hob body; one end of the outer pressure strip close to the wedge-shaped wall of the clamping ring groove is wedge-shaped.

8. The detachable cone fixing structure of the shield machine cutter seat according to claim 7, characterized in that: The locking assembly is a screw.

9. The detachable cone fixing structure of the shield machine cutter seat according to claim 8, characterized in that: An adjustment strip is arranged in the positioning ring groove; the adjustment strip abuts against the positioning boss; and the adjustment strip can be replaced.

10. The detachable cone fixing structure of the shield machine cutter seat according to claim 9, characterized in that: The width of the inner layer is greater than the width of the outer layer.

Images