Hob mounting structure of shield tunneling machine

Abstract

The utility model discloses a shield tunneling machine hob installation structure which comprises two tool apron plates arranged at intervals, and tensioning through grooves are formed in the opposite faces of the two tool apron plates. The two clamping blocks are provided with two abutting surfaces; the two wedge blocks are vertically mounted in the tensioning through groove in a sliding manner, and each wedge block is provided with a pressing surface; the two pressing blocks are provided with binding surfaces; the two tensioning rods are arranged on the pressing block in a penetrating manner and can lift and adjust the position relative to the pressing block so as to drive the wedge block to clamp the hob shaft; and the two ends of the bridging plate are fixedly connected with the two pressing blocks respectively. The hob shaft is clamped through cooperation of the pressing face and the two abutting faces, only the position of the tensioning rod needs to be adjusted in the dismounting process, and the mounting and dismounting efficiency is high; and the two pressing blocks are fixedly connected through the bridging plate, so that the situation that the pressing blocks are fixed only by being tightly attached to the tool apron plate is avoided, dislocation and floating of the pressing blocks are avoided, and the stability of rolling installation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shield machine equipment, and particularly to an installation structure of a hob for a shield machine. Background Art

[0002] During the construction process of a shield machine, the hob is a key component on the cutter head of the shield machine, responsible for cutting and breaking the formation to facilitate the smooth advancement of the shield machine. The traditional hob installation structure has certain limitations. During the construction of the shield machine in hard rock strata, the hob will be subjected to extremely large rock-breaking loads and vibrations. The hob is fixedly installed on the hob seat through a pressing block and a tension rod. Under high-frequency vibrations, the pressing block may undergo slight movement or deflection, resulting in deformation and fracture of the tension rod, and ultimately leading to engineering problems such as the hob being unable to be locked normally and falling off. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides an installation structure of a hob for a shield machine, which has a stable structure and is not easily damaged.

[0004] To achieve the above object, the technical solution adopted by the utility model is as follows:

[0005] An installation structure of a hob for a shield machine includes: two spaced-apart cutter seat plates, with tension through grooves provided on the opposite surfaces of the two cutter seat plates; two clamping blocks, respectively detachably installed on the opposite sides of the two cutter seat plates, having two abutting surfaces forming a certain angle; two wedge blocks, respectively vertically slidably installed in the tension through grooves on both sides, having a pressing surface, and the two angles formed by the pressing surface and the two abutting surfaces are both less than a certain degree; two pressing blocks, having a fitting surface, and the fitting surfaces of the two pressing blocks are respectively in contact with the corresponding cutter seat plates; two tension rods, passing through the pressing blocks and capable of adjusting their positions relatively up and down, and the bottom hooks the wedge blocks to drive the wedge blocks to clamp the hob shaft located between the pressing surface and the two abutting surfaces; a bridging plate, with both ends fixedly connected to the two pressing blocks respectively.

[0006] Further, the wedge block and the pressing block are respectively provided with a first through hole and a second through hole for the tension rod to pass through vertically. The lower end of the tension rod passes through the first through hole and is provided with a rod head with a contour larger than the first through hole. The upper end of the tension rod passes through the second through hole and is connected with a first nut.

[0007] Further, a limiting convex block protruding from one of the abutting surfaces is provided at the bottom of the clamping block, and an opening groove with an opening facing the pressing surface is formed between the limiting convex block and the two abutting surfaces.

[0008] Further, both sides of the upper end of the tension through groove have a supporting surface, the fitting surface is in contact with the supporting surface, and the fitting surface and the supporting surface are in concave-convex fit.

[0009] Further, the fitting surface is provided with positioning posts, and the supporting surface is provided with positioning holes for the positioning posts to be inserted into.

[0010] Further, the tool holder plate has a first abutting surface and a second abutting surface, and the top surface of the clamping block and the side surface facing away from the wedge block are respectively in contact with the first abutting surface and the second abutting surface.

[0011] Further, the top surface of the clamping block is provided with a positioning protrusion, and the first abutting surface is provided with a positioning groove for the positioning protrusion to be inserted into.

[0012] Further, the side surface of the clamping block facing away from the wedge block is provided with a clamping hole, the second abutting surface is provided with a mounting hole aligned with the clamping hole, and a clamping post is elastically and movably mounted in the mounting hole. The clamping post can extend out of the mounting hole and insert into the clamping hole under the action of elastic force.

[0013] Further, a guiding convex shaft embedded in the mounting hole is provided in the middle of the clamping post, and a compression spring is sleeved on the clamping post. The compression spring is located on the side of the guiding convex shaft facing away from the clamping block.

[0014] Further, the inner wall of one end of the mounting hole facing the clamping block is provided with an inwardly protruding limiting convex ring for abutting against the guiding convex shaft.

[0015] The utility model has the following beneficial effects:

[0016] By using the cooperation of the pressing surface and the two abutting surfaces to surround the hob shaft, and then using the lifting and lowering of the tension rod to adjust the position, driving the wedge block to clamp the hob shaft located between the pressing surface and the two abutting surfaces. The two included angles formed by the pressing surface and the two abutting surfaces are both less than a certain degree, so that the pressing surface can push the hob shaft towards the two abutting surfaces, thereby clamping the hob shaft. And when disassembling, only the position of the tension rod needs to be adjusted, and the installation and disassembly efficiency is high; the bridging plate fixedly connects the two pressing blocks, thus preventing the pressing blocks from being only fixed in position by closely adhering to the tool holder plate, avoiding the misalignment and deflection of the positions of the pressing blocks, resulting in the deformation and fracture of the tension rod, improving the installation stability, making the structure stable and not easily damaged.

[0017] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. The following will refer to the drawings to make a further detailed description of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an improper limitation to the utility model. In the drawings:

[0019] Figure 1 is the overall structural schematic diagram of the embodiment of the utility model;

[0020] Figure 2 is Figure 1 a sectional view of;

[0021] Figure 3 is Figure 2 an enlarged view of portion A of;

[0022] Figure 4 is a schematic diagram of partial structural decomposition of an embodiment of the present utility model;

[0023] Figure 5 is a schematic diagram of the decomposed state structure of the tool holder plate and the clamping block.

[0024] Reference numerals:

[0025] Tool holder plate 100, hob shaft 101, hob 102, baffle 103, tensioning through groove 110, support surface 111, positioning hole 112, first abutting surface 120, positioning groove 121, second abutting surface 130, mounting hole 131, limiting collar 132;

[0026] Clamping block 200, abutting surface 210, limiting protrusion 220, opening groove 230, positioning protrusion 240, clamping hole 250;

[0027] Wedge block 300, pressing surface 310, first through hole 320;

[0028] Pressing block 400, fitting surface 410, positioning post 411, second through hole 420;

[0029] Tensioning rod 500, rod head 510, first nut 520;

[0030] Bridging plate 600;

[0031] Clamping post 700, guiding convex shaft 710, compression spring 720. Detailed implementation manners

[0032] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0034] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture (as shown in the attached drawings). If this specific posture changes, the directional indications will also change accordingly.

[0035] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0036] Please refer to Figure 1 and Figure 2 As shown in and, a cutter head hob installation structure in a preferred embodiment provided by the present utility model includes a cutter seat plate 100, a clamping block 200, a wedge block 300, a pressing block 400, a tension rod 500, and a bridging plate 600. There are two cutter seat plates 100, two clamping blocks 200, two wedge blocks 300, two pressing blocks 400, and two tension rods 500.

[0037] The two cutter seat plates 100 are arranged at intervals, and tension through slots 110 are provided on the opposite surfaces of the two cutter seat plates 100. The two clamping blocks 200 are respectively detachably installed on the opposite sides of the two cutter seat plates 100 and have two abutting surfaces 210 forming a certain angle. The two wedge blocks 300 are respectively vertically slidably installed in the tension through slots 110 on both sides and have a pressing surface 310. The two angles formed by the pressing surface 310 and the two abutting surfaces 210 are both less than 90 degrees. The two pressing blocks 400 have fitting surfaces 410, and the fitting surfaces 410 of the two pressing blocks 400 are respectively in contact with the corresponding cutter seat plates 100. The two tension rods 500 respectively pass through the two pressing blocks 400. The tension rod 500 can adjust its position relative to the pressing block 400 in a lifting manner, and the bottom hooks the wedge block 300 to drive the wedge block 300 to clamp the hob shaft 101 located between the pressing surface 310 and the two abutting surfaces 210. The two ends of the bridging plate 600 are respectively fixedly connected to the two pressing blocks 400. It can be understood that a hob 102 is rotatably sleeved on the hob shaft 101. The two ends of the hob shaft 101 extend out of the hob 102 and are clamped and fixed by the wedge block 300 and the clamping block 200. The parts of the two ends of the hob shaft 101 extending out of the hob 102 also have surfaces corresponding to and in contact with the pressing surface 310 and the abutting surface 210.

[0038] A cutter head hob mounting structure provided by the utility model uses the cooperation of a pressing surface 310 and two abutting surfaces 210 to surround the hob shaft 101, and then uses a tension rod 500 to adjust the position up and down, driving a wedge block 300 to clamp the hob shaft 101 located between the pressing surface 310 and the two abutting surfaces 210. The two included angles formed by the pressing surface 310 and the two abutting surfaces 210 are both less than 90 degrees, so that the pressing surface 310 can push the hob shaft 101 towards the two abutting surfaces 210, thereby clamping the hob shaft 101. And when disassembling, only the position of the tension rod 500 needs to be adjusted, and the installation and disassembly efficiency is high; the bridging plate 600 fixedly connects the two pressing blocks 400, so that the two pressing blocks 400 will not move away from or close to each other, thereby preventing the pressing blocks 400 from being fixed only by closely adhering to the cutter seat plate 100, avoiding the dislocation and deflection of the positions of the pressing blocks 400, resulting in deformation and fracture of the tension rod 500, improving the installation stability, making the structure stable and not easily damaged; without the function of the bridging plate 600, the two pressing blocks 400 may be misaligned or deflected in the direction of approaching each other, resulting in deformation and fracture of the tension rod 500. It can be understood that during installation, the pressing blocks 400 on both sides will fit with the inner walls of the cutter seat plates 100 on both sides, playing a certain limiting role. Coupled with the connection of the bridging plate 600, the two pressing blocks 400 will not have the freedom to approach, making the installation of the pressing blocks 400 stable. The bridging plate 600 is in an upward V shape, which can avoid the hob 102 and also has a certain function of guiding rock slag flow, avoiding rock slag getting stuck in the hob and affecting the rotation of the hob.

[0039] Specifically, as Figure 2 shown, the two abutting surfaces 210 are vertically arranged, and the two included angles formed by the pressing surface 310 and the two abutting surfaces 210 are both less than 90 degrees.

[0040] Referring to Figure 2 In some embodiments of the present utility model, the wedge block 300 and the pressing block 400 are respectively provided with a first through hole 320 and a second through hole 420 for the vertical passing of the tension rod 500. The lower end of the tension rod 500 passes through the first through hole 320 and is provided with a rod head 510 whose contour is larger than that of the first through hole 320. The upper end of the tension rod 500 passes through the second through hole 420 and is connected with a first nut 520. The contour of the first nut 520 is larger than that of the second through hole 420. Thus, by screwing the first nut 520, the wedge block 300 can be driven to move upward, thereby using the pressing surface 310 to press the hob shaft 101.

[0041] Referring to Figure 2 and Figure 4, in some embodiments of the present utility model, a limiting lug 220 protruding from one of the abutting surfaces 210 is provided at the bottom of the clamping block 200. The limiting lug 220 and the two abutting surfaces 210 form an opening groove 230 with an opening facing the pressing surface 310. Thus, during installation, the hob shaft 101 is restricted within the opening groove 230, achieving a pre-positioning effect and facilitating subsequent installation.

[0042] Referring to Figure 2 and Figure 4 , in some embodiments of the present utility model, both sides at the upper end of the tension through groove 110 of the tool holder plate 100 have supporting surfaces 111. The fitting surface 410 is in contact with the supporting surfaces 111, and the fitting surface 410 and the supporting surfaces 111 are in concave-convex fit, thereby achieving a positioning effect on the pressing block 400.

[0043] Referring to Figure 2 and Figure 4 , in some embodiments of the present utility model, the fitting surface 410 is provided with positioning posts 411, and the supporting surfaces 111 are provided with positioning holes 112 for the positioning posts 411 to be embedded. By embedding the positioning posts 411 into the positioning holes 112, the positioning of the pressing block 400 is achieved, thereby improving its assembly accuracy and avoiding the influence on hob installation caused by its dislocation.

[0044] Referring to Figure 2 and Figure 4 , in some embodiments of the present utility model, the tool holder plate 100 has a first abutting surface 120 and a second abutting surface 130. The top surface of the clamping block 200 is in contact with the first abutting surface 120. The side surface of the clamping block 200 facing away from the wedge block 300 is in contact with the second abutting surface 130, thereby providing an abutting and positioning effect for the clamping block 200. Specifically, the first abutting surface 120 and the second abutting surface 130 are respectively parallel to the two abutting surfaces 210 to respectively relieve the acting forces received by the two abutting surfaces 210. Secondly, the structural gap during the installation of the clamping block 200 is also eliminated, making the structure more compact.

[0045] Referring to Figures 3 to 5 , in some embodiments of the present utility model, the top surface of the clamping block 200 is provided with a positioning protrusion 240, and the first abutting surface 120 is provided with a positioning groove 121 for the positioning protrusion 240 to be embedded, thereby achieving a positioning effect on the clamping block 200.

[0046] Referring to Figures 3 to 5, in some embodiments of the present utility model, a positioning hole 250 is provided on the side of the clamping block 200 facing away from the wedge block 300, and an installation hole 131 aligned with the positioning hole 250 is provided on the second abutting surface 130. A positioning column 700 is elastically and movably installed in the installation hole 131. The positioning column 700 can extend out of the installation hole 131 and insert into the positioning hole 250 under the action of elastic force. The positioning and limiting of the clamping block 200 are realized by inserting the positioning column 700 into the positioning hole 250. Then, by embedding the positioning protrusion 240 into the positioning groove 121, the position of the clamping block 200 can be fixed. Moreover, in the normal installation state, the clamping block 200 will be subjected to the extrusion force of the wedge block 300, so that the clamping block 200 abuts against the first abutting surface 120 and the second abutting surface 130, and the position is stable. Therefore, during installation, only by embedding the positioning protrusion 240 into the positioning groove 121 and inserting the positioning column 700 into the positioning hole 250, the installation and disassembly are convenient.

[0047] Refer to Figures 3 to 5 , in a further embodiment of the present utility model, a guiding convex shaft 710 embedded in the installation hole 131 is provided in the middle of the positioning column 700, and a compression spring 720 is sleeved on the positioning column 700. The compression spring 720 is located on the side of the guiding convex shaft 710 facing away from the clamping block 200. The guiding convex shaft 710 is adapted to the contour of the installation hole 131, so as to play a role of sliding guidance. Secondly, the guiding convex shaft 710 can also be abutted by the compression spring 720 to transmit the elastic acting force. By using the elastic acting force of the compression spring, the positioning column 700 is kept in the state of inserting into the positioning hole 250 to realize stable limiting. It can be understood that when the device is installed on the cutter head of a shield machine, a baffle 103 will be provided on the side wall of the cutter seat plate 100. The baffle 103 is fixed on the side wall of the cutter seat plate 100 to close one end of the installation hole 131 facing away from the clamping block 200, so that the end of the compression spring 720 away from the guiding convex shaft 710 can be abutted.

[0048] Refer to Figures 3 to 5 , in a further embodiment of the present utility model, a limiting convex ring 132 protruding inwards is provided on the inner wall of one end of the installation hole 131 facing the clamping block 200, so as to abut against the guiding convex shaft 710, thereby preventing the positioning column 700 from disengaging from one end of the installation hole 131 facing the clamping block 200 and playing a role of limiting the clamping block 200.

[0049] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A shield machine cutter installation structure, characterized in that: include: Two knife seat plates (100) are arranged at intervals, and the opposing surfaces of the two knife seat plates (100) are both provided with tensioning through grooves (110); Two clamping blocks (200) are detachably mounted on opposite sides of two knife seat plates (100) and have two abutting surfaces (210) at a certain angle; Two wedge blocks (300) are respectively vertically slidably mounted on the tensioning grooves (110) on both sides, and have a pressing surface (310), wherein two angles formed by the pressing surface (310) and the two abutting surfaces (210) are both less than 90 degrees; The two pressing blocks (400) have a fitting surface (410), and the fitting surfaces (410) of the two pressing blocks (400) are respectively fitted with the knife seat plates (100) on the corresponding sides; Two tension rods (500) are inserted through the pressing block (400) and can be raised and lowered relative to the pressing block (400) to adjust their positions. The bottom of the two tension rods hooks the wedge block (300) to drive the wedge block (300) to clamp the hob shaft (101) between the pressing surface (310) and the two abutting surfaces (210); The bridge plate (600) has two ends fixedly connected to the two pressing blocks (400) respectively.

2. The shield machine cutter installation structure according to claim 1, characterized in that: The wedge block (300) and the pressure block (400) are respectively provided with a first through hole (320) and a second through hole (420) for the tension rod (500) to vertically pass through. The lower end of the tension rod (500) passes through the first through hole (320) and is provided with a rod head (510) whose contour is larger than the first through hole (320). The upper end of the tension rod (500) passes through the second through hole (420) and is connected with a first nut (520).

3. The shield machine cutter installation structure according to claim 1, characterized in that: The bottom of the clamping block (200) is provided with a limiting protrusion (220) protruding from one of the abutting surfaces (210), and the limiting protrusion (220) and the two abutting surfaces (210) form an opening groove (230) opening toward the pressing surface (310).

4. The shield machine cutter installation structure according to claim 1, characterized in that: The tightening through groove (110) has support surfaces (111) on both sides of the upper end, the fitting surface (410) fits with the support surface (111), and the fitting surface (410) and the support surface (111) are matched in a concave-convex manner.

5. The shield machine cutter installation structure according to claim 4, characterized in that: The fitting surface (410) is provided with a positioning column (411), and the supporting surface (111) is provided with a positioning hole (112) for the positioning column (411) to be embedded.

6. The shield machine cutter installation structure according to claim 1, characterized in that: The knife seat plate (100) has a first abutment surface (120) and a second abutment surface (130), and the top surface of the clamping block (200) and the side surface facing away from the wedge block (300) are respectively in contact with the first abutment surface (120) and the second abutment surface (130).

7. The shield machine cutter installation structure according to claim 6, characterized in that: The top surface of the clamping block (200) is provided with a positioning protrusion (240), and the first abutting surface (120) is provided with a positioning groove (121) for the positioning protrusion (240) to be embedded.

8. The shield machine cutter installation structure according to claim 7, characterized in that: A locking hole (250) is provided on the side of the locking block (200) facing away from the wedge block (300), and the second abutting surface (130) is provided with a mounting hole (131) aligned with the locking hole (250). A locking column (700) is elastically and movably installed in the mounting hole (131), and the locking column (700) can extend out of the mounting hole (131) and be inserted into the locking hole (250) under the action of elastic force.

9. The shield machine cutter installation structure according to claim 8, characterized in that: A guide convex shaft (710) embedded in the mounting hole (131) is provided in the middle of the locking column (700), and a compression spring (720) is sleeved on the locking column (700), wherein the compression spring (720) is located on the side of the guide convex shaft (710) facing away from the locking block (200).

10. The shield machine cutter installation structure according to claim 9, characterized in that: An inner wall of one end of the mounting hole (131) facing the clamping block (200) is provided with an inwardly protruding limiting convex ring (132) for abutting against the guide convex shaft (710).

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