Underground pipe network construction ditcher cutterhead

Abstract

The utility model relates to a cutterhead of a ditcher for underground pipe network construction. The cutterhead effectively solves the problems that the cutterhead of the ditcher is small in cutting depth and poor in stability. According to the technical scheme, a plurality of cutter teeth are evenly distributed on the circumference of the outer wall of the cutter frame, a triangular wheel frame is arranged in the cutter frame, a roller is installed on each vertex of the wheel frame, each roller makes rolling contact with the inner wall of the cutter frame, and a U-shaped connecting frame is fixedly connected to the upper end of the wheel frame. The connecting frame is used for being installed and connected with an engineering vehicle. The upper portion of the tool rest penetrates through a notch of the connecting frame. An inner gear ring is coaxially fixed on the inner wall of the knife rest, a gear is mounted at the top of the wheel carrier, and the gear is meshed with the inner gear ring; under the condition that the diameter of the knife rest is not increased, the furrowing depth upper limit is obviously improved; the three rollers support the knife rest in a three-point mode, the supporting point positions are more dispersed, the effective supporting area is larger, and the supporting rigidity and the rotating stability of the knife rest can be improved.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery, specifically a cutterhead for an underground pipeline trenching machine. Background Technology

[0002] In the construction of underground pipeline networks, trenching machines are used to create trenches on the ground for laying pipelines. Patent application number 201811604373.4 discloses a trenching machine in which the cutterhead is supported and installed via a main shaft, and the drive mechanism is also located on the main shaft. This is currently the most common cutterhead installation and drive configuration for trenching machines. However, due to interference between the main shaft and the ground, the maximum depth the cutterhead can penetrate into the ground is less than half the diameter of the cutterhead, necessitating a larger diameter cutterhead. Furthermore, the single-point support of the main shaft results in fewer support points and a smaller effective support range, leading to poor installation rigidity and stability during rotation of the cutterhead. Summary of the Invention

[0003] To address the issues of shallow cutting depth and poor stability of trenching machine cutterheads, this utility model provides a trenching machine cutterhead for underground pipeline construction.

[0004] The technical solution includes a circular tool holder with several cutting teeth evenly distributed around its outer wall. Inside the tool holder is a triangular wheel frame with a roller mounted at each vertex. Each roller rolls in contact with the inner wall of the tool holder. A U-shaped connecting frame is fixedly connected to the upper end of the wheel frame for installation and connection with an engineering vehicle. The upper part of the tool holder passes through the slot of the connecting frame. An internal gear ring is coaxially fixed to the inner wall of the tool holder, and a gear is mounted on the top of the wheel frame, meshing with the internal gear ring.

[0005] The inner wall of the tool holder has a coaxially formed annular limiting groove, and all three rollers are located within the limiting groove; the internal gear ring is located at the bottom of the limiting groove, and the tooth tip of the internal gear ring is lower than the bottom of the limiting groove.

[0006] The gear is coaxially connected to a pulley, which is located outside the connecting frame.

[0007] The tool holder and the internal gear ring are separate units. The tool holder consists of two coaxial ring frames on the left and right, and the gear ring is coaxially clamped between the two ring frames. The two ring frames and the gear ring are connected and fixed axially by a first bolt.

[0008] The cutting teeth are fixed to the tool holder by a second bolt.

[0009] This invention uses three rollers to support the tool holder, and the drive mechanism is located at the top of the tool holder. Without the interference of the main shaft, the tool holder can cut into the ground to a depth of at least two-thirds of its diameter, thus significantly increasing the upper limit of trenching depth without increasing the diameter of the tool holder.

[0010] This invention uses three rollers to provide three-point support for the tool holder, resulting in more dispersed support points and a larger effective support area, which improves the support rigidity and stability of the tool holder during rotation. Attached Figure Description

[0011] Figure 1 This is the front view of the present invention.

[0012] Figure 2 This is a perspective view of the present invention.

[0013] Figure 3 This is a perspective view of the present invention with a partial sectional view.

[0014] Figure 4 This is the left view of the present invention with a partial sectional view. Detailed Implementation

[0015] Referring to the accompanying drawings, this utility model includes a circular tool holder 1. A plurality of cutting teeth 2 are evenly distributed around the outer wall of the tool holder 1. A triangular wheel frame 3 is located inside the tool holder 1. A roller 4 is installed at each vertex of the wheel frame 3. Each roller 4 rolls in contact with the inner wall of the tool holder 1, supporting the tool holder 1 and allowing it to rotate around its axis without a main shaft. A U-shaped connecting frame 5 is fixedly connected to the upper end of the wheel frame 3 for connection to an engineering vehicle. The upper part of the tool holder 1 passes through the slot of the connecting frame 5. An internal gear ring 6 is coaxially fixed to the inner wall of the tool holder 1. A gear 7 is installed on the top of the wheel frame 3, meshing with the internal gear ring 6. The gear 7 drives the internal gear ring 6 to rotate, thereby causing the tool holder 1 to rotate for grooving.

[0016] The tool holder 1 has an annular limiting groove 8 coaxially formed on its inner wall. All three rollers 4 are located in the limiting groove 8, which limits the tool holder 1 axially. The internal gear ring 6 is located at the bottom of the limiting groove 8, and the tooth tip of the internal gear ring 6 is lower than the bottom of the limiting groove 8. The rollers 4 do not interfere with the gear ring.

[0017] The gear 7 is coaxially connected to a pulley 9, which is located outside the connecting frame 5. The drive mechanism drives the pulley 9 and gear 7 to rotate via a belt, which in turn drives the tool holder 1 to rotate via the internal gear ring 6.

[0018] The tool holder 1 and the internal gear ring 6 are separate units. The tool holder 1 is composed of two coaxial ring frames 10 on the left and right. The gear ring is coaxially sandwiched between the two ring frames 10. The two ring frames 10 and the gear ring are connected and fixed by the first bolt 11 in the axial direction.

[0019] The cutting teeth 2 are fixed to the tool holder 1 by the second bolt 12. If a cutting tooth 2 is damaged, it can be replaced individually.

[0020] This utility model is installed on the lifting arm of the engineering vehicle via a connecting frame 5. In use, the driving mechanism of the engineering vehicle drives the pulley 9 to rotate via a belt, which in turn drives the gear 7 of the pulley 9 to rotate. The gear 7 drives the cutter holder 1 to rotate via the internal gear ring 6. After the cutter holder 1 is started, the cutter disc gradually cuts into the ground when the lifting arm is pressed down. After cutting into the ground, the engineering vehicle moves forward along the trenching path to carry out trenching operations. The three rollers 4 provide radial support for the cutter holder 1, and the limiting groove 8 provides axial limit for the cutter holder 1, so that the cutter holder 1 can rotate stably around the axis.

[0021] This invention eliminates the interference of the main shaft, significantly increasing the upper limit of the trenching depth without increasing the diameter of the tool holder 1; the tool holder 1 is supported at three points by three rollers 4, the support points are more dispersed, the effective support area is larger, and the support rigidity and stability during rotation of the tool holder 1 can be improved.

Claims

1. A cutterhead for an underground pipeline trenching machine, comprising a circular cutter holder (1), wherein a plurality of cutter teeth (2) are evenly distributed around the outer wall of the cutter holder (1), characterized in that, The tool holder (1) has a triangular wheel frame (3) inside. A roller (4) is installed at each vertex of the wheel frame (3). Each roller (4) rolls in contact with the inner wall of the tool holder (1). A U-shaped connecting frame (5) is fixedly connected to the upper end of the wheel frame (3). The connecting frame (5) is used for installation and connection with the engineering vehicle. The upper part of the tool holder (1) passes through the slot of the connecting frame (5). An internal gear ring (6) is coaxially fixed to the inner wall of the tool holder (1). A gear (7) is installed on the top of the wheel frame (3). The gear (7) meshes with the internal gear ring (6).

2. The cutterhead of an underground pipeline construction trenching machine according to claim 1, characterized in that, The inner wall of the tool holder (1) has a coaxially formed annular limiting groove (8), and the three rollers (4) are all located in the limiting groove (8); the internal gear ring (6) is located at the bottom of the limiting groove (8), and the tooth tip of the internal gear ring (6) is lower than the bottom of the limiting groove (8).

3. The cutterhead of an underground pipeline trenching machine according to claim 1, characterized in that, The gear (7) is coaxially connected to a pulley (9), which is located outside the connecting frame (5).

4. The cutterhead of an underground pipeline trenching machine according to claim 1 or 2, characterized in that, The tool holder (1) and the internal gear ring (6) are separate. The tool holder (1) consists of two coaxial ring frames (10) on the left and right. The gear ring is coaxially sandwiched between the two ring frames (10). The two ring frames (10) and the gear ring are connected and fixed by the first bolt (11) in the axial direction.

5. The cutterhead of an underground pipeline trenching machine according to claim 1, characterized in that, The cutting teeth (2) are fixed to the tool holder (1) by the second bolt (12).

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