U-shaped bracket for assembling cutting part of horizontal shaft heading machine

Abstract

The invention provides a U-shaped support for assembling a cutting part of a transverse shaft heading machine, and belongs to the technical field of mechanical assembling. The U-shaped support for assembling the cutting part of the transverse shaft heading machine comprises an installation part which is arranged on the inner side of one end of the U-shaped support and used for being connected with a speed reducer, the installation part comprises a first installation plate, a second installation plate and a lifting oil cylinder, and the first installation plate is fixedly installed on the U-shaped support. The second mounting plate is arranged to be a combination of the first plate body and the second plate body, and the first plate body and the second plate body are arranged to be capable of being folded or unfolded, so that the overall thickness of the second mounting plate is smaller than the thickness of the mounting groove in the hoisting and lowering process; and meanwhile, the plate spring is matched with the supporting beam and the guide plate to provide buffering performance, so that better protection performance is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical assembly, and in particular to a U-shaped bracket for assembling a cutting part of a horizontal axis tunneling machine. Background Art

[0002] When the cutting part of the current horizontal axis tunnel boring machine is installed on the U-shaped frame by hoisting, the second mounting plate of the U-shaped frame is first connected to the cutting part, and then the cutting part is installed by hoisting by inserting the second mounting plate into the first mounting plate of the U-shaped frame.

[0003] In the process of inserting the first mounting plate into the second mounting plate, the ground workers and the crane operators need to cooperate with each other to ensure that the second mounting plate can be accurately inserted into the first mounting plate, which requires a high level of operating skills of the personnel. At the same time, during the process of inserting the second mounting plate into the first mounting plate, the cutting part as a whole is prone to shaking, causing the second mounting plate and the first mounting plate to collide and rub against each other, which can easily cause wear. At the same time, there are certain safety hazards. Summary of the invention

[0004] In order to solve the above technical problems, the present invention proposes a U-shaped bracket for assembling the cutting part of a horizontal axis tunnel boring machine, which is convenient for hoisting the reducer of the cutting part of the horizontal axis tunnel boring machine and can improve the buffering and protection effect.

[0005] The technical solution of the present invention is achieved in this way:

[0006] A U-shaped bracket for assembling a cutting part of a horizontal axis tunneling machine, comprising a mounting portion arranged on the inner side of one end of the U-shaped bracket for connecting a reducer, the mounting portion comprising a first mounting plate, a second mounting plate and a lifting cylinder, the first mounting plate being fixedly mounted on the U-shaped bracket, and a mounting groove for inserting the second mounting plate is formed between the first mounting plate and the end of the U-shaped bracket, the second mounting plate is used to connect the reducer, the lifting cylinder is provided with one on both sides of the inner cavity of the mounting groove, for supporting the lifting of the second mounting plate, the second mounting plate comprising a first plate body and a second plate body that are relatively slidably matched, and the first mounting plate is provided with a second plate body and a lifting cylinder, and the second mounting plate is provided with a first plate body and a second plate body that are relatively slidably matched, and the first mounting plate is provided with a second plate body and a lifting cylinder, and the second mounting plate is provided with a first plate body and a second plate body that are relatively slidably matched, and the first mounting plate is provided with a second plate body and a lifting cylinder, and the first mounting plate is provided with a second plate body and a lifting cylinder, and the second mounting plate is provided with a first plate body and a second plate body that are relatively slidably matched, and the second mounting plate is provided with a first plate body and a second plate body that are relatively slidably matched, and the first mounting plate is provided with a second plate body and a lifting cylinder, and the first mounting plate is provided with a first plate body and a second plate body that are relatively slidably matched ... A leaf spring is provided between a plate body and a second plate body for keeping the second mounting plate in a closed state; when the first plate body and the second plate body are closed, the thickness of the second mounting plate is less than the thickness of the mounting groove; a guide groove is provided between opposite sides of both ends of the first plate body and the second plate body; a support beam is provided at the top end of the lifting cylinder; both sides of the support beam are connected with guide plates that can be inserted into the guide groove through an outward extension bracket; and when the second mounting plate is inserted into the bottom end of the mounting groove, the outward extension bracket drives the guide plate to unfold the first plate body and the second plate body to a state of being close to the side wall of the mounting groove.

[0007] Further, the first mounting plate is in the shape of a "C" - shaped plate, with its opening facing the end of the U - shaped bracket. Extension parts extend outward from the upper parts on both sides of the first plate body and the second plate body. The guiding groove is formed in the extension part, and the lifting oil cylinder is arranged corresponding to the bottom of the extension part.

[0008] Further, the abduction bracket includes a triangular frame and a top rod. Two sets of triangular frames are arranged corresponding to the guiding plate in the height direction. The triangular bracket includes an upper rotating rod and a lower rotating rod. The ends of the upper rotating rod and the lower rotating rod away from the support beam are coaxial and rotatably connected to the guiding plate. The ends of the upper rotating rod and the lower rotating rod away from the guiding plate are respectively rotatably connected to the support beam and the top rod. A slider is connected to the top end of the guiding plate, and the slider is slidably sleeved on the support beam.

[0009] Further, a rod spring is arranged on the support beam. The bottom end of the spring is fixed to the support beam, and the top end of the rod spring is connected to the slider. The rod spring is used to keep the included angle between the upper rotating rod and the lower rotating rod in the triangular frame obtuse in the initial state.

[0010] Further, the initial height of the top end of the top rod is greater than the height of the end of the uppermost lower rod body close to the support beam. The top end of the top rod is rotatably connected to the slider. An arc - shaped first top block is arranged on the support beam, and an arc - shaped second top block is arranged on the side of the top rod facing the support beam. The second top block is located between the two triangular brackets in the height direction. In the initial state, the first top block supports the inner side of the lower part of the second top block, so that the bottom end of the top rod inclines away from the support beam.

[0011] Further, a plurality of guiding plates are arranged in the height direction. Two sets of triangular frames are arranged corresponding to each guiding plate. One top rod is arranged on both sides of the support beam. The ends of the lower rotating rods in all the triangular frames on one side of the support beam close to the support beam are rotatably connected to the top rod. The first top block and the second top block are located between the uppermost two sets of triangular frames in the initial state.

[0012] Further, a guiding block is fixedly connected to the top end of the side of the first top block close to the support beam. A receiving groove for accommodating the first top block is arranged on the side wall of the support beam. First guiding grooves distributed longitudinally and second guiding grooves vertically connected to the top ends of the first guiding grooves are arranged on the two inner side walls of the receiving groove. The guiding block makes the first top block align with the receiving groove by moving upward in the first guiding groove, and the guiding block makes the first top block be received in the receiving groove by moving inward in the second guiding groove. An external pushing spring for pushing the first top block out of the receiving groove is arranged at the top end of the side wall of the receiving groove.

[0013] Furthermore, a limiting groove is provided at the bottom end of the first top block, and a limiting protrusion is fixedly provided on the inner bottom wall of the accommodating groove. When the first top block enters the accommodating groove, the limiting groove slides outside the limiting protrusion.

[0014] Furthermore, a top plate is fixedly arranged in the mounting groove, which is used to block the top rod before it descends to the lowest position, so that the top rod moves upward on the support beam to extend the tripod, and a rod groove is opened on the top of the top plate for inserting the bottom end of the top rod.

[0015] The present invention has the following beneficial effects:

[0016] 1. By setting the second mounting plate as a combination of the first plate body and the second plate body, and setting the first plate body and the second plate body to be able to be closed or unfolded, the overall thickness of the second mounting plate is smaller than the thickness of the mounting groove during the hoisting and lowering process, which can better reduce the impact and friction caused by hoisting errors and shaking. At the same time, the buffering performance provided by the leaf spring in combination with the support beam and the guide plate has better protection performance.

[0017] 2. By setting the cooperation between the outward extension bracket and the guide plate and combining the telescopic performance of the lifting cylinder, the second mounting plate can be automatically unfolded during the process of inserting the second mounting plate into the mounting groove, and the unfolded second mounting plate has a stable supporting effect, thereby ensuring the stability of the second mounting plate.

[0018] 3. By setting the unfolding process of the second mounting plate to be before it is inserted into the bottom of the mounting groove, the second mounting plate can be inserted into the mounting groove more conveniently and quickly before unfolding, thereby reducing the difficulty of the lifting operation and improving the operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the second mounting plate of the present invention when it is inserted into the first mounting plate;

[0020] Figure 2 The present invention Figure 1 A in the enlarged view;

[0021] Figure 3 The present invention Figure 1 A cross-sectional view of the U-shaped bracket in FIG.

[0022] Figure 4 The present invention Figure 3 The enlarged view of point B in the figure;

[0023] Figure 5 The present invention Figure 4 The enlarged view of point C in the figure;

[0024] Figure 6 The present invention Figure 3 The enlarged view of D in the figure;

[0025] Figure 7 The present invention Figure 3 The enlarged view of point E in the figure;

[0026] Figure 8 is a structural schematic diagram of a second mounting plate of the present invention;

[0027] Fig. 9 It is a schematic diagram of the second mounting plate of the present invention when it is completely inserted into the first mounting plate.

[0028] In the figure: 1. U-shaped bracket; 2. first mounting plate; 3. lifting cylinder; 4. mounting groove; 5. first plate body; 6. second plate body; 7. leaf spring; 8. guide groove; 9. support beam; 10. guide plate; 11. extension part; 12. push rod; 13. upper rotating rod; 14. lower rotating rod; 15. slider; 16. rod spring; 17. first push block; 18. second push block; 19. guide block; 20. accommodating groove; 21. first guide groove; 22. second guide groove; 23. push-out spring; 24. limit groove; 25. limit protrusion; 26. top plate; 27. rod groove. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figures 1 to 9 As shown, a U-shaped bracket for assembling the cutting part of a horizontal axis tunneling machine includes a mounting portion arranged on the inner side of one end of the U-shaped bracket 1 for connecting a reducer, the mounting portion includes a first mounting plate 2, a second mounting plate and a lifting cylinder 3, the first mounting plate 2 is fixedly mounted on the U-shaped bracket, and a mounting groove 4 for inserting the second mounting plate is formed between the first mounting plate 2 and the end of the U-shaped bracket 1, the second mounting plate is used to connect the reducer, the lifting cylinder 3 is provided on both sides of the inner cavity of the mounting groove 4, and is used to support the lifting of the second mounting plate, the second mounting plate includes a first plate body 5 and a second plate body 6 that are relatively slidably matched, and the first plate body 5 A leaf spring 7 is provided between the first plate body 5 and the second plate body 6 for keeping the second mounting plate in a closed state. When the first plate body 5 and the second plate body 6 are closed, the thickness of the second mounting plate is less than the thickness of the mounting groove 4. A guide groove 8 is provided between the opposite sides of the first plate body 5 and the second plate body 6. A support beam 9 is provided at the top end of the lifting cylinder 3. Both sides of the support beam 9 are connected with guide plates 10 that can be inserted into the guide groove 8 through an outward extension bracket. When the second mounting plate is inserted into the bottom end of the mounting groove 4, the outward extension bracket drives the guide plate 10 to unfold the first plate body 5 and the second plate body 6 to a state of being close to the side wall of the mounting groove 4.

[0031] During the process of inserting the second mounting plate connected with the speed reducer into the mounting groove 4 by using the hoisting equipment, the lifting cylinder 3 supports at the bottom of the second mounting plate to support the lowering of the second mounting plate in the mounting groove 4. When the second mounting plate connected with the speed reducer is withdrawn from the mounting groove 4 by using the hoisting equipment, the lifting cylinder 3 supports at the bottom of the second mounting plate to support the rising of the second mounting plate in the mounting groove 4.

[0032] In the initial state, the extending end of the lifting cylinder 3 is in the extended state. At this time, the guiding plate 10 is located above the mounting groove 4 and is exposed. Before inserting the second mounting plate connected with the speed reducer into the mounting groove 4 by using the hanging bracket, taking the guiding plate 10 as a reference, the guiding groove 8 on the second mounting plate is sleeved on the guiding plate 10 and the support beam 9 from top to bottom. After the guiding plate 10 and the support beam 9 are completely inserted into the guiding groove 8, the bottom end of the second mounting plate is supported by the lifting cylinder 3.

[0033] During the process of continuously inserting the second mounting plate into the mounting groove 4, the support beam 9 and the guiding plate 10 as a whole have a guiding and limiting effect on the second mounting plate as a whole through the guiding groove 8, preventing the second mounting plate from hitting the U-shaped bracket 1 and the first mounting plate 2 due to shaking or position deviation.

[0034] The function of the leaf spring 7 is to keep the first plate body 5 and the second plate body 6 in a closed state in the initial state, so that the second mounting plate as a whole is in the state with the smallest thickness. Furthermore, during the process of inserting the second mounting plate into the mounting groove 4, there is a certain gap between the mounting groove 4 and the second mounting plate for hoisting error or shaking. At the same time, since both the support beam 9 and the guiding plate 10 are inserted into the guiding groove 8, when shaking occurs, the elastic force of the leaf spring 7 can play a certain buffering effect, further improving the hoisting safety and better avoiding impact.

[0035] The first mounting plate 2 is in the shape of a "C" plate, and its opening faces the end of the U-shaped bracket 1. The upper parts on both sides of the first plate body 5 and the second plate body 6 extend outwards with extension parts 11, the guiding groove 8 is opened in the extension parts 11, and the lifting cylinder 3 is arranged corresponding to the bottom of the extension parts 11. By setting the extension parts 11, the second mounting plate as a whole is in the structure of a "T" plate, which is more convenient for the arrangement of the lifting cylinder 3 in the mounting groove 4.

[0036] The outrigger bracket includes a triangular bracket and a top rod 12. Two groups of triangular brackets are arranged corresponding to the guiding plate 10 in the height direction. The triangular bracket includes an upper rotating rod 13 and a lower rotating rod 14. The ends of the upper rotating rod 13 and the lower rotating rod 14 away from the support beam 9 are in a coaxial state and are rotatably connected to the guiding plate 10. The ends of the upper rotating rod 13 and the lower rotating rod 14 away from the guiding plate 10 are respectively rotatably connected to the support beam 9 and the top rod 12. The top end of the guiding plate 10 is connected with a slider 15, and the slider 15 is slidably sleeved on the support beam 9.

[0037] The two sets of tripods are rotatably connected to the upper and lower parts of the guide plate 10 respectively. The slider 15 slides the push rod 12 on the support beam 9. When the push rod 12 moves upward, it drives the lower rotating rod 14 to move upward, so that the angle between the upper rotating rod 13 and the lower rotating rod 14 in the tripod becomes smaller. In this process, the tripod sets the guide plate 10 to the side away from the support beam 9, so that the extension bracket is unfolded to both sides of the support beam 9. Then, the first plate body 5 and the second plate body 6 are unfolded by the extension bracket, and the first plate body 5 and the second plate body 6 are finally tightly attached to the inner walls of the two sides of the mounting groove 4. In the process of pushing open the first mounting plate 2 and the second mounting plate, the guide plate 10 has a sufficient contact surface with the first mounting plate 2 and the second mounting plate, so that the application of the pushing force is more balanced and uniform.

[0038] A rod spring 16 is provided on the support beam 9, the bottom end of the spring is fixed to the support beam 9, and the top end of the rod spring 16 is connected to the slider 15. The rod spring 16 is used to keep the angle between the upper rotating rod 13 and the lower rotating rod 14 in the tripod at an obtuse angle in the initial state. By utilizing the supporting function of the rod spring 16, the tripod in the initial state has a contraction performance, and then the overall extension bracket has a buffering performance. At this time, the dual buffering function of the rod spring 16 and the leaf spring 7 can further improve the protection effect.

[0039] The initial height of the top end of the push rod 12 is greater than the height of the uppermost lower rod body near one end of the support beam 9, and the top end of the push rod 12 is rotatably connected to the slider 15. A first arc-shaped push block 17 is provided on the support beam 9, and a second arc-shaped push block 18 is provided on the side of the push rod 12 facing the support beam 9. The second push block 18 is located between the first triangular bracket and the second triangular bracket distributed from top to bottom in the height direction, and in the initial state, the first push block 17 is supported on the lower inner side of the second push block 18, so that the bottom end of the push rod 12 is inclined toward the side away from the support beam 9.

[0040] By utilizing the supporting effect of the rod spring 16, in the initial state, the second top block 18 is stably supported on the outer side surface of the upper end of the first top block 17, so that the top rod 12 is in an inclined state with the bottom end away from the support beam 9, and the guide plate 10 is in an inclined state with the bottom end away from the support beam 9. At this time, the guide plates 10 located on both sides of the support beam 9 are in a state where the top end distance is smaller than the bottom end distance, which makes it easier for the guide plates 10 to be inserted into the guide groove 8. In addition, after the top end of the guide plate 10 is inserted into the guide groove 8, the surface of the guide plate 10 is squeezed by the guide groove 8 and switched to a vertical state. When the guide plate 10 is set in a vertical state, the guide plates 10 on both sides of the support beam 9 are supported by the tripod under the action of the rod spring 16 so that the distance between the opposite sides of the two guide plates 10 is greater than the width of the guide groove 8.

[0041] Therefore, during the process of the guide plate 10 being inserted into the guide groove 8 and rotating to a vertical state, the guide plate 10 squeezes the tripod toward the side of the support beam 9. Since the upper rod in the tripod is rotatably connected to the support beam 9, the lower rod in the tripod pushes the top rod 12 to move downward during this process. During the downward displacement of the top rod 12, the second top block 18 passes over the first top block 17 from top to bottom and moves to the bottom of the first top block 17 until the second top block 18 contacts the side surface of the support beam 9. At this time, the tripod is flush in the vertical direction, and the guide plate 10 is also in a vertical state. A certain squeezing force is formed between the guide plate 10 and the second mounting plate, so that the guide plate 10 is kept in a close contact state with the first plate body 5 and the second plate body 6. In this way, it is ensured that during the entire process of the second mounting plate being inserted into the mounting groove 4, the elastic force provided by the rod spring 16 has a good damping effect on the shaking of the second mounting plate.

[0042] There are multiple guide plates 10 arranged in the height direction, and two sets of tripods are arranged corresponding to each guide plate 10. A top rod 12 is arranged on both sides of the support beam 9, and the lower rotating rod 14 in all the tripods located on one side of the support beam 9 is rotatably connected to the top rod 12 at one end close to the support beam 9. The first top block 17 and the second top block 18 are located between the two uppermost sets of tripods in the initial state.

[0043] A guide block 19 is fixedly connected to the top of the first top block 17 near the support beam 9, and a receiving groove 20 for receiving the first top block 17 is arranged on the side of the support beam 9. The inner walls of both sides of the receiving groove 20 are provided with longitudinally distributed first guide grooves 21 and second guide grooves 22 vertically connected to the top of the first guide grooves 21. The guide block 19 is moved upward in the first guide groove 21 so that the first top block 17 is aligned with the receiving groove 20. The guide block 19 is moved inward in the second guide groove 22 so that the first top block 17 is received in the receiving groove 20. The top of the side wall of the receiving groove 20 is provided with an outward push spring 23 for pushing the first top block 17 out of the receiving groove 20.

[0044] In the process of the push rod 12 moving upward to unfold the extension bracket and drive the guide plate 10 to push the first plate body 5 and the second plate body 6 apart, the second push block 18 pushes the first push block 17 to move upward. When the guide block 19 moves from the bottom end of the first guide groove 21 to its top end, the guide block 19 is located in the second guide groove 22 in the horizontal direction. After that, as the second push block 18 continues to move upward following the push rod 12, the second push block 18 presses the first push block 17 into the receiving groove 20. The first push spring 23 is compressed during the process of the first push block 17 entering the receiving groove 20. After the second push block 18 separates from the first push block 17, the first push block 17 moves outward from the receiving groove 20 under the action of the push spring 23, and finally moves downward to the initial position under the action of its own gravity.

[0045] It should be noted that, in the initial state, when the first top block 17 is supported on the bottom side of the second top block 18, the first top block 17 is restricted by the guide block 19 and the first guide groove 21, so that it has a stable supporting effect on the second top block 18. At the same time, when the top rod 12 moves upward so that the second top block 18 passes through the first top block 17, the first top block 17 is stored in the receiving groove 20, so that the bottom end of the top rod 12 will not swing outward, ensuring that during the deployment of the outward extension bracket, the guide plate 10 is vertically displaced to both sides, and there is no need to swing the bottom end to the side away from the support beam 9 again, so that the wall guide plate 10 is deformed and the opening effect of the second mounting plate is improved.

[0046] A limiting groove 24 is provided at the bottom end of the first top block 17, and a limiting protrusion 25 is fixedly provided on the inner bottom wall of the receiving groove 20. When the first top block 17 enters the receiving groove 20, the limiting groove 24 slides outside the limiting protrusion 25. The limiting protrusion 25 cooperates with the limiting groove 24 to guide the bottom of the first top block 17 when the first top block 17 enters or leaves the receiving groove 20, thereby improving the stability of the first top block 17 when sliding.

[0047] A top plate 26 is fixedly arranged in the mounting groove 4, which is used to block the top rod 12 before the top rod 12 descends to the lowest position, so that the top rod 12 moves upward on the support beam 9 to extend the tripod, and a rod groove 27 is provided on the top of the top plate 26 for inserting the bottom end of the top rod 12. When the second mounting plate is about to be fully inserted into the mounting groove 4, the bottom end of the top plate 26 is inserted into the rod groove 27 and supported by the inner bottom wall of the rod groove 27, so that in the subsequent retraction stroke of the lifting cylinder 3, the top rod 12 moves upward relative to the support beam 9, so that the outward extension bracket is unfolded. In this process, the bottom end of the top rod 12 is effectively limited by the rod groove 27, ensuring that the top rod 12 is more balanced and stable when applying force to the guide plate 10.

[0048] It should be noted that after the second mounting plate is inserted into the mounting groove 4 by applying the above-mentioned solution of the present invention, the first plate body 5 and the second plate body 6 can be further connected to the two side walls of the mounting groove 4 by bolt connection to improve stability. In addition, when the reducer is connected to the second mounting plate, the reducer is connected to the first plate body 5. The specific method is to open a threaded hole for connecting the reducer on the first plate body 5, and connect the reducer to the first plate body 5 by connecting the bolts with the threaded hole. This is the prior art and will not be described in detail.

[0049] 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A U-shaped bracket for assembling the cutting part of a horizontal axis tunnel boring machine, comprising a mounting portion arranged on the inner side of one end of the U-shaped bracket (1) for connecting a reducer, the mounting portion comprising a first mounting plate (2), a second mounting plate and a lifting cylinder (3), the first mounting plate (2) being fixedly mounted on the U-shaped bracket, and forming a mounting groove (4) for inserting the second mounting plate between the first mounting plate (2) and the end of the U-shaped bracket (1), the second mounting plate being used to connect the reducer, the lifting cylinder (3) being provided with one on each side of the inner cavity of the mounting groove (4) for supporting the lifting of the second mounting plate, characterized in that: The second mounting plate includes a first plate body (5) and a second plate body (6) that are relatively slidably engaged, and a leaf spring (7) for keeping the second mounting plate in a closed state is provided between the first plate body (5) and the second plate body (6). When the first plate body (5) and the second plate body (6) are closed, the thickness of the second mounting plate is less than the thickness of the mounting groove (4). Guide grooves (8) are provided between the opposite sides of the two ends of the first plate body (5) and the second plate body (6). A support beam (9) is provided at the top end of the lifting oil cylinder (3). Guide plates (10) that can be inserted into the guide grooves (8) are connected to both sides of the support beam (9) through outward expansion brackets. When the second mounting plate is inserted into the bottom end of the mounting groove (4), the outward expansion brackets drive the guide plates (10) to expand the first plate body (5) and the second plate body (6) to a state of being closely attached to the side wall of the mounting groove (4).

2. A U-shaped bracket for assembling the cutting part of a horizontal axis tunnel boring machine according to claim 1, characterized in that: The first mounting plate (2) is in the shape of a "C" - shaped plate, and its opening faces the end of the U - shaped bracket (1). Extension parts (11) extend outward from the upper parts on both sides of the first plate body (5) and the second plate body (6). The guide grooves (8) are formed in the extension parts (11). The lifting oil cylinder (3) is arranged corresponding to the bottom of the extension parts (11).

3. A U-shaped bracket for assembling the cutting part of a horizontal axis tunnel boring machine according to claim 1, characterized in that: The outward expansion bracket includes a triangular bracket and a top rod (12). Two sets of triangular brackets are arranged corresponding to the guide plates (10) in the height direction. The triangular bracket includes an upper rotating rod (13) and a lower rotating rod (14). The ends of the upper rotating rod (13) and the lower rotating rod (14) far from the support beam (9) are coaxial and rotatably connected to the guide plate (10). The ends of the upper rotating rod (13) and the lower rotating rod (14) far from the guide plate (10) are respectively rotatably connected to the support beam (9) and the top rod (12). A slider (15) is connected to the top end of the guide plate (10). The slider (15) is slidably sleeved on the support beam (9).

4. A U-shaped bracket for assembling the cutting part of a horizontal axis tunnel boring machine according to claim 3, characterized in that: A rod spring (16) is provided on the support beam (9). The bottom end of the spring is fixed to the support beam (9), and the top end of the rod spring (16) is connected to the slider (15). The rod spring (16) is used to keep the included angle between the upper rotating rod (13) and the lower rotating rod (14) in the triangular bracket obtuse in the initial state.

5. A U-shaped bracket for assembling the cutting part of a horizontal axis tunnel boring machine according to claim 3, characterized in that: The initial height of the top end of the top rod (12) is greater than the height of the end of the uppermost lower rod body close to the support beam (9). The top end of the top rod (12) is rotatably connected to the slider (15). An arc - shaped first top block (17) is provided on the support beam (9). An arc - shaped second top block (18) is provided on the side surface of the top rod (12) facing the support beam (9). The second top block (18) is located between the two triangular brackets in the height direction. In the initial state, the first top block (17) supports the inner lower part of the second top block (18), so that the bottom end of the top rod (12) inclines away from the support beam (9).

6. A U-shaped bracket for assembling the cutting part of a horizontal axis tunnel boring machine according to claim 5, characterized in that: The guide plates (10) are provided with a plurality of them in the height direction, two sets of tripods are provided corresponding to each guide plate (10), one of the top rods (12) is provided corresponding to both sides of the support beam (9), and the lower rotating rods (14) in all the tripods located on one side of the support beam (9) are rotatably connected to the top rod (12) at one end close to the support beam (9), and the first top block (17) and the second top block (18) are located between the two uppermost sets of tripods in an initial state.

7. A U-shaped bracket for assembling the cutting part of a horizontal axis tunnel boring machine according to claim 5, characterized in that: A guide block (19) is fixedly connected to the top end of the first top block (17) near the support beam (9); a receiving groove (20) for receiving the first top block (17) is arranged on the side of the support beam (9); the inner walls on both sides of the receiving groove (20) are provided with longitudinally distributed first guide grooves (21) and second guide grooves (22) vertically connected to the top end of the first guide groove (21); the guide block (19) is moved upward in the first guide groove (21) so that the first top block (17) is aligned with the receiving groove (20); the guide block (19) is moved inward in the second guide groove (22) so that the first top block (17) is received in the receiving groove (20); and an outward push spring (23) for pushing the first top block (17) out of the receiving groove (20) is arranged at the top end of the side wall of the receiving groove (20).

8. A U-shaped bracket for assembling the cutting part of a horizontal axis tunnel boring machine according to claim 7, characterized in that: A limiting groove (24) is provided at the bottom end of the first top block (17), and a limiting protrusion (25) is fixedly provided on the inner bottom wall of the accommodating groove (20); when the first top block (17) enters the accommodating groove (20), the limiting groove (24) slides outside the limiting protrusion (25).

9. A U-shaped bracket for assembling the cutting part of a horizontal axis tunnel boring machine according to claim 3, characterized in that: A top plate (26) is fixedly arranged in the installation groove (4) and is used to block the top rod (12) before the top rod (12) descends to the lowest position, so that the top rod (12) moves upward on the support beam (9) to extend the tripod outward, and a rod groove (27) is provided on the top of the top plate (26) for inserting the bottom end of the top rod (12).

Images