Impact cutter head of shield cutter

Abstract

The utility model discloses a shield cutter impact cutter head which comprises a cutter body, a hammer head, a clamping ring and an impact anvil, a cavity is formed in the cutter body, a helium spring is embedded in the cavity, a spring cavity is formed in the impact anvil, one end of a first spring is installed in the spring cavity, and the other end of the first spring is connected with the hammer head; a check ring is arranged at an opening of the cavity, an outer edge protrusion is arranged on the side wall of the hammer head, and the outer edge protrusion is matched with the check ring. The impact anvil is sleeved with a hammer head, and a second spring is arranged between the hammer head and the helium spring. And by arranging a helium spring and a plurality of springs matched with one another, the knocking force is increased while it is guaranteed that the alloy protruding blocks can knock the hard rock, and rock crushing is further accelerated. And through the arrangement of a steel ball and the pushing effect of the steel ball on the impact anvil matching groove and the clamping ring matching groove, all the structures after knocking can automatically return to the original position, and preparation is made for following knocking.

Description

Technical Field

[0001] The utility model relates to the technical field of shield equipment, in particular to an impact cutter head installed on a shield cutter. Background Technique

[0002] At present, there are a certain number of alloy bumps on some shield cutters, and this part of the alloy bumps is the part that actually contacts the rock. Since this part of the alloy bumps is embedded and installed on the shield cutter and cannot move by itself, the force exerted by the shield cutter on the hard rock during the shield process is not large.

[0003] If only one spring is provided at the connection part between the alloy bump and the shield cutter, there will not only be insufficient impact performance and weak knocking force, but also the independent spring is more likely to be damaged, affecting the overall service life of the device. Content of the Utility Model

[0004] The purpose of the utility model is to provide an impact cutter head for a shield cutter to solve the problem of increasing the contact force between the shield cutter and the rock surface.

[0005] To achieve the above purpose, the utility model provides the following technical solution: an impact cutter head for a shield cutter, including a cutter body, a hammer head, a snap ring and an impact anvil. A cavity is opened in the cutter body, and a helium spring is embedded and installed in the cavity. A spring cavity is opened in the impact anvil, and one end of a first spring is installed in the spring cavity, and the other end of the first spring is connected to the hammer head; a retaining ring is provided at the opening of the cavity, and an outer edge protrusion is provided on the side wall of the hammer head, and the outer edge protrusion cooperates with the retaining ring; the impact anvil is sleeved with the hammer head, the hammer head is sleeved with a snap ring, a second spring is provided between the hammer head and the helium spring, and a third spring is provided between the snap ring and the retaining ring; a steel ball groove is opened on the side wall of the hammer head, and a steel ball is arranged in the steel ball groove. A cavity is provided on the top surface of the hammer head. An impact anvil mating groove is provided on the outer side wall of the impact anvil, and the impact anvil mating groove cooperates with the steel ball; the end of the impact anvil is placed in the cavity, and a snap ring mating groove is provided on the inner side wall of the snap ring, and the snap ring mating groove cooperates with the steel ball.

[0006] Preferably, the retaining ring is connected to the cutter body by screws.

[0007] Preferably, an exhaust hole is opened on the side wall of the cutter body, and the exhaust hole communicates with the cavity.

[0008] Preferably, a guide post is provided inside the hammer head, and the first spring is sleeved outside the guide post.

[0009] Preferably, an arc-shaped knocking protrusion is provided on the bottom surface of the hammer head.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] By setting up a helium spring and multiple cooperating springs, while ensuring that the alloy bump can strike hard rock, the striking force is increased and the rock breaking is further accelerated.

[0012] And through the setting of the steel balls and the pushing effect of the steel balls on the impact anvil mating groove and the snap ring mating groove, at the same time, the second spring and the third spring can make the parts return to their original positions after being struck. After each part automatically returns to its original position, the entire device prepares for the next strike. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic cross-sectional view of the impact cutter head of the shield cutter of the present utility model.

[0014] Figure 2 It is a schematic cross-sectional view of the hammer head of the present utility model.

[0015] Figure 3 It is a schematic cross-sectional view of the snap ring of the present utility model.

[0016] Figure 4 It is a schematic cross-sectional view of the impact anvil of the present utility model.

[0017] 1. Cutter body; 2. Hammer head; 21. Steel ball groove; 22. Cavity; 23. Cavity; 3. Snap ring; 31. Snap ring mating groove; 4. Retaining ring; 5. Impact anvil; 51. Impact anvil mating groove; 52. Spring cavity; 6. Guide post; 7. Helium spring; 8. Steel ball; 9. Second spring; 10. Third spring; 11. Screw; 12. First spring; 13. Cavity; 14. Exhaust hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0019] Please refer to Figures 1-4, the present utility model provides a technical solution: a shield cutter impact cutter head, which includes a cutter body 1, a hammer head 2, a snap ring 3 and an impact anvil 5. A cavity 13 is formed in the cutter body 1, and a helium gas spring 7 is embedded and installed in the cavity 13. In the initial state, the output end of the helium gas spring 7 is in contact with the impact anvil 5. A spring cavity 52 is formed in the impact anvil 5, and one end of a first spring 12 is installed in the spring cavity 52, and the other end of the first spring 12 is connected to the hammer head 2. This ensures that the hammer head 2 can reset after being pressed, realizing the hammering of hard rock. An arc-shaped knocking protrusion is provided on the bottom surface of the hammer head 2 to ensure the knocking effect on the rock surface. At the same time, a cavity 23 is provided on the top surface of the hammer head 2, and the end of the impact anvil 5 is placed in the cavity 23.

[0020] In order to ensure that the first spring 12 can move along the vertical direction, a guide post 6 is provided inside the hammer head 2, and the first spring 12 is sleeved outside the guide post 6.

[0021] A retaining ring 4 is provided at the opening of the cavity 13. An outer edge protrusion 22 is provided on the side wall of the hammer head 2, and the outer edge protrusion 22 cooperates with the retaining ring 4 to limit the maximum distance of the outward movement of the hammer head 2. The retaining ring 4 is connected to the cutter body 1 by screws 11.

[0022] The impact anvil 5 is sleeved with the hammer head 2, the hammer head 2 is sleeved with the snap ring 3. A second spring 9 is provided between the hammer head 2 and the helium gas spring 7, and a third spring 10 is provided between the snap ring 3 and the retaining ring 4. The second spring 9 and the third spring 10 are mechanisms for resetting the hammer head 2 and the snap ring 3, enabling the workpiece to return to the initial position after one hammering.

[0023] A steel ball groove 21 is formed on the side wall of the hammer head 2, and a steel ball 8 is arranged in the steel ball groove 21. The diameter of the steel ball 8 is greater than the depth of the steel ball groove 21. A number of steel ball grooves 21 and steel balls 8 are provided and are arranged circumferentially. The steel ball 8 is an important mechanism for driving the snap ring 3 and the impact anvil to move. An impact anvil mating groove 51 is provided on the outer side wall of the impact anvil 5, and the impact anvil mating groove 51 cooperates with the steel ball 8. An inner side wall of the snap ring 3 is provided with a snap ring mating groove 31, and the snap ring mating groove 31 cooperates with the steel ball 8.

[0024] In order to ensure that the air pressure inside and outside the device is in a balanced state, an exhaust hole 14 is formed on the side wall of the cutter body 1, and the exhaust hole 14 is communicated with the cavity 13. At the same time, an air passage connecting the exhaust hole 14 is also provided on the snap ring 3 to ensure that there is no vacuum state inside the snap ring 3.

[0025] Working principle: When the arc-shaped knocking protrusion of the hammer head 2 contacts the hard rock, it will press the steel ball 8 to move inward. At this time, the steel ball 8 in the steel ball groove 21 will push the anvil mating groove 51 of the impact anvil 5 and move inward together. When the steel ball 8 moves to the position of the snap ring mating groove 31, the steel ball 8 will move outward. At this time, the steel ball 8 will no longer hold the anvil mating groove 51. Due to the elastic effects of the helium gas spring 7 and the second spring 9, the impact anvil impacts the hammer head to achieve the impact effect.

[0026] During the reset process of the hammer head 2, since the steel ball 8 holds the snap ring mating groove 31, it will drive the snap ring 3 to move outward. At this time, the third spring 10 is compressed and the snap ring 3 has a tendency to reset. When the snap ring 3 moves to a position where the steel ball 8 can roll from the snap ring mating groove 31 to the anvil mating groove 51, the movement of the snap ring 3 will be unrestricted. At this time, the snap ring 3 resets with the third spring 10, and the entire device returns to the initial position.

[0027] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present utility model. Any reference signs in the claims should not be construed as limiting the claimed rights.

[0028] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A shield cutter impact cutter head, characterized in that: It includes a tool body (1), a hammer head (2), a snap ring (3) and an impact anvil (5). A cavity (13) is formed in the tool body (1), and a helium gas spring (7) is embedded and installed in the cavity (13). A spring cavity (52) is formed in the impact anvil (5), and one end of a first spring (12) is installed in the spring cavity (52), and the other end of the first spring (12) is connected to the hammer head (2). A retaining ring (4) is provided at the opening of the cavity (13). An outer edge protrusion (22) is provided on the side wall of the hammer head (2), and the outer edge protrusion (22) cooperates with the retaining ring (4). The impact anvil (5) is sleeved with the hammer head (2), the hammer head (2) is sleeved with the snap ring (3), a second spring (9) is provided between the hammer head (2) and the helium gas spring (7), and a third spring (10) is provided between the snap ring (3) and the retaining ring (4). A steel ball groove (21) is formed in the side wall of the hammer head (2), and a steel ball (8) is arranged in the steel ball groove (21). A cavity (23) is provided on the top surface of the hammer head (2). An impact anvil mating groove (51) is provided on the outer side wall of the impact anvil (5), and the impact anvil mating groove (51) cooperates with the steel ball (8). The end of the impact anvil (5) is placed in the cavity (23). A snap ring mating groove (31) is provided on the inner side wall of the snap ring (3), and the snap ring mating groove (31) cooperates with the steel ball (8).

2. The impact cutter head of the shield cutter according to claim 1, characterized in that: The retaining ring (4) is connected to the tool body (1) by screws (11).

3. The impact cutter head of the shield cutter according to claim 1, characterized in that: An exhaust hole (14) is formed in the side wall of the tool body (1), and the exhaust hole (14) communicates with the cavity (13).

4. The impact cutter head of a shield cutter according to claim 1, characterized in that: A guide post (6) is provided inside the hammer head (2), and the first spring (12) is sleeved outside the guide post (6).

5. The impact cutter head of a shield cutter according to claim 1, characterized in that: An arc-shaped knocking protrusion is provided on the bottom surface of the hammer head (2).

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