Screw bit connecting and mounting structure of trenching machine

Abstract

The utility model discloses an auger bit connecting and mounting structure of a trenching machine, which comprises a driving motor and an auger bit, a shaft sleeve I is arranged at the bottom of the driving motor, a fixed shaft is arranged at the top of the auger bit, a fixed plate I is arranged at the bottom of the fixed shaft, and clamping grooves I are uniformly formed in the axial direction of the fixed shaft; a first clamping protrusion matched with the first clamping groove is arranged in the first shaft sleeve in the axial direction, the first clamping groove and the first clamping protrusion are installed in a sliding mode so that the fixing shaft can be installed in the first shaft sleeve in a clamped mode and limited to rotate in the axial direction, a limiting base coaxial with the first shaft sleeve is arranged on the surface of the outer wall of the first shaft sleeve, and fixed installation between the driving motor and the spiral drill bit is achieved. The problem of loose installation in the prior art is solved, and abrasion between parts and large noise are reduced. Second clamping grooves are evenly distributed in the limiting base in the axial direction, the first limiting installation shaft sleeve and the fixing shaft are further reinforced, and stable construction operation of the spiral drill bit in grooving construction is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of spiral drill bit connection and installation structure, specifically to a spiral drill bit connection and installation structure for a trenching machine. Background Technology

[0002] The auger drill bit of the trenching machine, through its auger groove design, can effectively remove the chips generated during the drilling process, ensuring a smooth drilling process. The chips are carried out of the borehole by the auger groove, avoiding the degradation of drilling quality and equipment damage caused by chip accumulation, thus enabling smooth trench excavation in the early stages of wall construction and improving the efficiency of excavation and chip removal.

[0003] However, current technology uses a plug-in installation method for mounting the auger drill bit and the drive motor of the trenching machine. The axial rotation of the auger drill bit is limited and fixed by a slot and a locking surface to ensure that the auger drill bit rotates with the drive motor during the drive process. The bottom of the auger drill bit and the drive motor are fixedly installed by a shaft pin plug-in installation, which prevents the auger drill bit from coming off the bottom of the drive motor. However, this installation method can cause the connection between the auger drill bit and the drive motor to loosen during trenching, resulting in severe wear and excessive noise, which affects the construction environment.

[0004] For example, in the prior art, publication number CN222101967U discloses an adjustable spiral pitch drill bit, belonging to the field of drill bit technology. This adjustable spiral pitch drill bit includes a drill rod, with a connecting flange fixedly connected to the end of the drill rod. A sleeve is fitted over the outside of the drill rod, and spiral blades are fixedly connected to the outside of the sleeve. In this invention, the drill bit mainly consists of a drill rod, a sleeve, and spiral blades. When the spiral pitch of the spiral blades needs to be adjusted, both sides of the locking blocks are pressed simultaneously to move the locking blocks out of the locking slots, allowing the sleeve and spiral blades to be removed. The spiral blades with the required spiral pitch are then removed, and the spiral blades are fitted over the outside of the drill rod through the sleeve. When the sleeve abuts against the curved surface of the locking block, the locking block retracts into the locking block slot against the spring force. When the sleeve is completely fitted over the outside of the drill rod, the spring pushes the locking block into the locking slot, thus completing the fixed connection between the drill rod and the sleeve. Through the detachable sleeve and spiral blades, the spiral pitch of the drill bit can be adjusted according to geological conditions.

[0005] Therefore, a connection and installation structure for the auger drill bit of a trenching machine is needed. Utility Model Content

[0006] In view of the problems existing in the prior art, the present invention provides a spiral drill bit connection and installation structure for a trenching machine, with the aim of solving the aforementioned technical problems.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a spiral drill bit connection and installation structure for a trenching machine, comprising a drive motor and a spiral drill bit. The bottom of the drive motor is configured as a bushing, the top of the spiral drill bit is configured as a fixed shaft, and the bottom of the fixed shaft is configured as a fixed plate. The fixed shaft has evenly spaced slots along its axial direction. The bushing has a protruding part axially aligned with the slot. The fixed shaft is inserted into the bushing, and the slots and protruding parts are slidably installed to engage the fixed shaft within the bushing for limiting and fixing. The shaft rotates axially. A limiting base is provided on the outer wall surface of the bushing one, which is coaxially arranged with it. The limiting base has grooves two evenly distributed axially. A limiting sleeve is sleeved on the outside of the limiting base. The top of the limiting sleeve is integrally set as a limiting plate one, and the bottom of the limiting sleeve is integrally set as a fixing plate two. The inner wall of the limiting sleeve is set as a protrusion two that matches the groove two. When the limiting sleeve and the limiting base are sleeved and installed, the protrusion two and the groove two are slidably installed to fix the limiting sleeve to rotate axially. The fixing plate one and the fixing plate two are fixedly installed by bolts.

[0008] Preferably, the top of the auger bit is configured as sleeve one, and the top surface of sleeve one is sealed to the bottom surface of bushing one.

[0009] Preferably, both slot one and slot two are configured as arc-shaped slot structures.

[0010] Preferably, the surface of the first protrusion that contacts the first slot is set with an arc-shaped structure, and the surface of the second protrusion that contacts the second slot is set with an arc-shaped structure.

[0011] Preferably, a through hole is provided in the middle of the limiting plate, and the inner diameter of the through hole is equal to the inner diameter of the limiting base.

[0012] In summary, this utility model provides a connection and installation structure for a auger drill bit of a trenching machine. A fixing plate is positioned at the bottom of the fixed shaft, and a limiting base is positioned outside the bushing. A limiting sleeve is fitted onto the bottom of the limiting base, and a fixing plate is positioned at the bottom of the limiting sleeve. The top of the limiting sleeve is positioned as the limiting plate. The limiting sleeve slides down, and the limiting plate engages with the top of the limiting base. The fixing plate and fixing plate are then fixed together with bolts, achieving a fixed installation between the bushing and the fixed shaft. This secures the drive motor and the auger drill bit, solving the problem of loose installation in existing technologies and reducing wear and noise between components. Furthermore, the limiting base has evenly distributed grooves, and the inner wall of the limiting sleeve is fitted with matching protrusions. The grooves and protrusions further reinforce the connection between the bushing and the fixed shaft, ensuring stable operation of the auger drill bit during trenching. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the connection and installation structure of the spiral drill bit of this utility model;

[0014] Figure 2 This is a sectional schematic diagram of the connection and installation structure of the spiral drill bit of this utility model;

[0015] Figure 3 This is a schematic diagram of the installation structure of the limiting base and the limiting sleeve of this utility model;

[0016] Figure 4 This is a schematic diagram of the card protrusion structure of this utility model;

[0017] In the diagram: 1. Drive motor; 2. Spiral drill bit; 3. Bushing 1; 4. Fixed shaft; 5. Fixed plate 1; 6. Slot 1; 7. Protrusion 1; 11. Limiting base; 12. Slot 2; 13. Limiting sleeve; 14. Fixed plate 2; 15. Protrusion 2; 16. Sleeve 1; 17. Through hole 21. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] like Figures 1 to 4 As shown:

[0020] This utility model relates to a connecting and mounting structure for a auger drill bit in a grooving machine, comprising a drive motor 1 and an auger drill bit 2. The bottom of the drive motor 1 is configured as a bushing 3, the top of the auger drill bit 2 is configured as a fixed shaft 4, and the bottom of the fixed shaft 4 is configured as a fixed plate 5. The fixed shaft 4 has evenly spaced slots 6 along its axial direction. The bushing 3 has a protrusion 7 axially aligned with the slots 6. The fixed shaft 4 is inserted into the bushing 3, and the slots 6 and protrusion 7 are slidably mounted to engage the fixed shaft 4 within the bushing 3, thereby limiting the axial rotation of the fixed shaft 4. The outer surface of the bushing 3 is provided with... A limiting base 11 is coaxially arranged with the limiting base 11. The limiting base 11 has grooves 12 evenly distributed axially. A limiting sleeve 13 is sleeved on the outside of the limiting base 11. The top of the limiting sleeve 13 is integrally set as a limiting plate 14, and the bottom of the limiting sleeve 13 is integrally set as a fixing plate 15. The inner wall of the limiting sleeve 13 is set as a protrusion 16 that matches the grooves 12. When the limiting sleeve 13 is sleeved with the limiting base 11, the protrusion 16 slides with the grooves 12 to fix the limiting sleeve 13 to rotate axially. The fixing plate 15 and the fixing plate 15 are fixedly installed by bolts.

[0021] To address the technical problem in the prior art where the connection between the auger drill bit 2 and the drive motor 1 becomes loose, causing severe wear between components and resulting in high noise, this utility model patent adopts the following technical structure: A fixed shaft 4 is set at the top of the auger drill bit 2, with grooves 6 evenly distributed axially on the fixed shaft 4. A bushing 3 is set at the bottom of the drive motor 1, with protrusions 7 axially distributed on the inner wall of the bushing 3. The protrusions 7 and grooves 6 are matched and installed to allow the fixed shaft 4 to be inserted into the bushing 3. The protrusions 7 and grooves 6 are also inserted and installed to prevent rotation between the bushing 3 and the fixed shaft 4 in the axial direction. A fixed plate 5 is set at the bottom of the fixed shaft 4, and a limiting base 11 is set on the outside of the bushing 3. A limiting sleeve 13 is sleeved on the bottom of the limiting base 11. The bottom of the sleeve 3 is set as a fixed plate 2 15, and the top of the limiting sleeve 13 is set as a limiting plate 14. The limiting sleeve 13 slides down and the limiting plate 14 is limited and locked with the top of the limiting base 11. The fixed plate 15 and the fixed plate 2 15 are fixedly installed by bolts, realizing the fixed installation of the sleeve 3 and the fixed shaft 4. This realizes the fixed installation between the drive motor 1 and the auger drill bit 2, solving the loose installation in the prior art and reducing wear between components and the generation of large noise. The limiting base 11 has grooves 2 12 evenly distributed axially, and the inner wall of the limiting sleeve 13 is set as a matching groove 2 16. The groove 2 12 and the matching groove 2 16 limit the installation, further strengthening the limiting installation of the sleeve 3 and the fixed shaft 4, realizing the stable operation of the auger drill bit 2 during grooving construction.

[0022] In at least one embodiment, in order to further achieve a sealed installation between the auger drill bit 2 and the bushing 3, and to ensure proper alignment and abutment during installation, and to limit the tightness of the installation between the auger drill bit 2 and the bushing 3, a sleeve 17 is provided at the top of the auger drill bit 2. The top surface of the sleeve 17 abuts against the bottom surface of the bushing 3, thereby achieving a sealed installation between the sleeve 17 and the bushing 3, reducing dust from entering the interior of the bushing 3, and reducing wear and tear on the bushing 3.

[0023] In at least one embodiment, in order to achieve a small installation gap between the first slot 6 and the second slot 12 and smooth installation, the structure is as follows: both the first slot 6 and the second slot 12 are set as arc-shaped groove structures.

[0024] In at least one embodiment, in order to achieve a small installation gap between the first slot 6 and the second slot 12 and smooth installation, the structure is as follows: the surface of the first protrusion 7 that contacts the first slot 6 is set as an arc structure, and the surface of the second protrusion 16 that contacts the second slot 12 is set as an arc structure.

[0025] In at least one embodiment, a through hole 21 is provided in the middle of the limiting plate 14. The inner diameter of the through hole 21 is equal to the inner diameter of the limiting base 11. By setting the through hole 21 structure, the through hole 21 is sleeved and installed on the bushing 3. The limiting plate 14 and the limiting base 11 are limited and abutted together, and the limiting sleeve 13 is fixedly installed with the fixing plate 5. This achieves the fixed installation between the auger drill bit 2 and the bushing 3, and solves the problem of loose installation between the auger drill bit 2 and the bushing 3.

[0026] The embodiments described in this utility model are for illustrative purposes only and do not constitute a limitation on the scope of the claims. Other substantially equivalent substitutions that can be conceived by those skilled in the art are all within the protection scope of this utility model.

Claims

1. A spiral drill bit connection and installation structure for a trenching machine, characterized in that, Includes a drive motor (1) and a spiral drill bit (2). The bottom of the drive motor (1) is set as a bushing (3), the top of the spiral drill bit (2) is set as a fixed shaft (4), the bottom of the fixed shaft (4) is set as a fixed plate (5), and the fixed shaft (4) has a slot (6) evenly opened in the axial direction. The bushing (3) has a protrusion (7) in the axial direction matching the slot (6). The fixed shaft (4) is inserted and installed in the bushing (3). The slot (6) and the protrusion (7) are slidably installed to engage the fixed shaft (4) in the bushing (3) to limit the axial rotation of the fixed shaft (4). The outer wall surface of the bushing (3) is provided with a limiter that is coaxially set with it. The base (11) has grooves (12) evenly distributed along its axis. The limiting base (11) is fitted with a limiting sleeve (13). The top of the limiting sleeve (13) is integrally set as a limiting plate (14). The bottom of the limiting sleeve (13) is integrally set as a fixing plate (15). The inner wall of the limiting sleeve (13) is set as a matching groove (12) with a protrusion (16). When the limiting sleeve (13) is fitted with the limiting base (11), the protrusion (16) and the groove (12) are slidably installed to fix the limiting sleeve (13) to rotate axially. The fixing plate (5) and the fixing plate (15) are fixedly installed by bolts.

2. The spiral drill bit connection and installation structure for a trenching machine according to claim 1, characterized in that, The top of the auger bit (2) is set as sleeve one (17), and the top surface of sleeve one (17) is sealed with the bottom surface of bushing one (3).

3. The spiral drill bit connection and installation structure for a trenching machine according to claim 1, characterized in that, Both slot 1 (6) and slot 2 (12) are designed as arc-shaped slot structures.

4. The spiral drill bit connection and installation structure for a trenching machine according to claim 3, characterized in that, The surfaces of the card protrusion 1 (7) and the card slot 1 (6) that are in contact are set as arc-shaped structures, and the surfaces of the card protrusion 2 (16) and the card slot 2 (12) that are in contact are set as arc-shaped structures.

5. The spiral drill bit connection and installation structure for a trenching machine according to claim 1, characterized in that, A through hole (21) is provided in the middle of the limiting plate (14), and the inner diameter of the through hole (21) is equal to the inner diameter of the limiting base (11).

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