A rotation-stopping structure of a ground drill bit

Abstract

The application discloses a rotation-stopping structure of a ground drill bit, which comprises a ground drill body, a power source and a gear box arranged in the ground drill body, wherein the gear box comprises an output shaft, and a working head is mounted on the end of the output shaft and connected with the output shaft; a support fixing plate, a bolt fixing support and a bolt are further included, the support fixing plate is fixedly mounted on the ground drill body, the bolt fixing support is fixedly mounted on the support fixing plate, and the bolt penetrates through the support fixing plate and the bolt fixing support; a drill sleeve is arranged on the working head, the drill sleeve is combined with the end of the output shaft, the drill sleeve and the output shaft have a through shaft hole which can keep coaxial, the bolt can slide on the bolt fixing support and be inserted into the through shaft hole, so that the working head, the output shaft and the support fixing plate are synchronously locked and connected.

Description

Technical Field

[0001] This application relates to the field of drilling technology, and in particular to an anti-rotation structure for a drilling bit. Background Technology

[0002] Existing gasoline-powered drilling rigs generally use gasoline engines, which drive the driven disc of a gear reducer via a clutch. After gear reduction, the torque required for drilling is output, ultimately driving the drilling head. Due to their lightweight structure, these devices are suitable for single-person outdoor operation.

[0003] However, existing technologies have poor adaptability to harsh working conditions. When the drill bit encounters complex geological environments such as tree roots and silt, it is very easy to get stuck and cause the machine to stop. In the stuck state, the drill bit is mechanically locked to the formation, and it is difficult for a single operator to remove the equipment from the borehole, which seriously restricts work efficiency.

[0004] The root of this problem lies in the fact that when the working head of a traditional drilling rig gets stuck, manually reversing it causes the gear set inside the gearbox to spin idly, preventing it from detaching from the geology. Therefore, there is an urgent need for a technical solution that can easily and quickly connect the working head to the drilling rig body without increasing the complexity of the equipment, thereby enabling rapid detachment.

[0005] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is the closest prior art to this application. Summary of the Invention

[0006] Based on this, this application provides an anti-rotation structure for a ground drill bit to solve one of the aforementioned technical problems.

[0007] The technical solution adopted by this application to solve its technical problem is: an anti-rotation structure for a ground drill bit, including a ground drill body, a power source and a gearbox are provided inside the ground drill body, the gearbox includes an output shaft, and a working head is installed at the end of the output shaft, the two being connected; it also includes a bracket fixing plate, a pin fixing bracket, and a pin, the bracket fixing plate is fixedly installed on the ground drill body, the pin fixing bracket is fixedly installed on the bracket fixing plate, and the pin passes through both the bracket fixing plate and the pin fixing bracket; a drill sleeve is provided on the working head, which is engaged with the end of the output shaft through the drill sleeve, the drill sleeve and the output shaft have a through shaft hole that can maintain coaxiality; the pin can slide on the pin fixing bracket and be inserted into the through shaft hole, so that the working head, the output shaft and the bracket fixing plate are synchronously locked and connected.

[0008] In some embodiments, the pin is provided with a positioning pin and a spring is sleeved on the pin. The spring is placed between the positioning pin and the pin fixing bracket. The pin fixing bracket is provided with a limiting part. The pin can drive the positioning pin to move towards the output shaft and abut against the limiting part, preventing it from retracting. The spring applies a force to the positioning pin abutting against the limiting part.

[0009] In some embodiments, the positioning pin is inserted in the diameter direction of the pin, and after the pin is displaced, it can be rotated circumferentially to achieve a limiting engagement between the positioning pin and the limiting part.

[0010] In some embodiments, the limiting part is a stamped and bent part integrally formed on the pin fixing bracket.

[0011] In some embodiments, the bracket fixing plate is welded to the drill body or connected by fasteners.

[0012] In some embodiments, the bracket fixing plate is L-shaped, and one of the connecting surfaces of the pin fixing bracket and the bracket fixing plate is welded or connected by fasteners.

[0013] In some embodiments, a locking pin is inserted into the output shaft and the drill sleeve of the working head to keep the output shaft and the working head rotating, and the end of the locking pin is limited by a snap ring.

[0014] In some embodiments, the pin has a bent portion and an insertion portion, both of which are L-shaped.

[0015] The beneficial effects of this application are as follows: by operating the pin to insert it into the through shaft hole, and rotating the positioning pin to abut against the limiting part, the positioning pin and the limiting part are pressed together under the action of the spring, thus completing the connection of the working head, output shaft and fixed bracket (and drilling rig body). This allows the working head to rotate synchronously when the drilling rig body is manually reversed. By using the spiral of the working head itself, drilling holes with tree roots or silt can be manually rotated, improving drilling efficiency. Moreover, the structure is simple and the cost is low, which is conducive to the promotion of the product. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional schematic diagram of the earth drill of this application.

[0018] Figure 2This is a cross-sectional schematic diagram of this application.

[0019] Figure 3 This application is Figure 2 Enlarged diagram of point A.

[0020] Explanation of reference numerals: 1. Drill body, 2. Output shaft, 3. Working head, 4. Support plate, 5. Pin fixing bracket, 501. Limiting part, 6. Pin, 601. Bending part, 602. Insertion part, 7. Drill sleeve, 8. Through shaft hole, 9. Positioning pin, 10. Spring, 11. Locking pin, 12. Snap ring. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In addition, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those of ordinary skill in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection of this application.

[0022] In the embodiments of this application, please refer to Figure 1-3 As shown, the anti-rotation structure of a ground drill bit mainly includes: a ground drill body 1, in which a power source and a gearbox are installed, the gearbox including an output shaft 2, and a working head 3 (i.e., a drill bit) is installed at the end of the output shaft 2, the two being connected; it also includes a bracket fixing plate 4, a pin fixing bracket 5, and a pin 6, the bracket fixing plate 4 being fixedly installed on the ground drill body 1, the pin fixing bracket 5 being fixedly installed on the bracket fixing plate 4, and the pin 6 passing through both the bracket fixing plate 4 and the pin fixing bracket 5; a drill sleeve 7 is provided on the working head 3, through which... The drill sleeve 7 is connected to the end of the output shaft 2. The drill sleeve 7 and the output shaft 2 have a through shaft hole 8 that can keep them coaxial. The pin 6 can slide on the pin fixing bracket 5 and be inserted into the through shaft hole 8, so that the working head 3, the output shaft 2 and the bracket fixing plate 4 are locked and connected synchronously. Specifically, the working head 3 is the drill bit of the ground drill. After the pin 6 is inserted into the through shaft hole 8, the drill body or the pin fixing bracket 5 can be rotated in the opposite direction to synchronously reverse the working head 3, so that the working head 3 can rotate out in the opposite direction along the original drill hole, so that the working head 3 can be removed from the tree stump or silt.

[0023] The following will continue to describe some preferred / improved embodiments based on the above embodiments. Any one of the following embodiments can be selected, or multiple embodiments can be combined.

[0024] like Figure 2-3 As shown, in order to keep the pin 6 locked to the working head 3, the pin 6 is provided with a positioning pin 9, and a spring 10 is sleeved on the pin 6. The spring 10 is placed between the positioning pin 9 and the pin fixing bracket 5. The pin fixing bracket 5 is provided with a limiting part 501. The pin 6 can drive the positioning pin 9 to move towards the output shaft 2 and abut against the limiting part 501 and cannot retract. The spring 10 applies a force to the positioning pin 9 abutting against the limiting part 501.

[0025] Furthermore, the positioning pin 9 is inserted in the diameter direction of the pin 6. After the pin 6 is displaced, it can be rotated circumferentially to make the positioning pin 9 and the limiting part 501 achieve a limiting engagement. After the positioning pin 9 and the end of the limiting part 501 abut against each other, the pin 6 can be locked to keep it locked to the working head 3. Similarly, rotating the pin 6 causes the positioning pin 9 to disengage from the limiting part 501. Under the action of the restoring force of the spring 10, the pin 6 resets and disengages from the through shaft hole 8, thereby unlocking.

[0026] Specifically, the limiting part 501 is a stamped and bent part integrally formed on the pin fixing bracket 5. The bent part and the contact end of the positioning pin 9 are kept flat, which can ensure that the positioning pin 9 is engaged on the limiting part 501.

[0027] Furthermore, the bracket fixing plate 4 is welded to the earth drill body 1 or connected by fasteners.

[0028] Furthermore, the bracket fixing plate 4 is L-shaped, and one of the connecting surfaces of the pin fixing bracket 5 and the bracket fixing plate 4 is welded or connected by fasteners.

[0029] Specifically, a locking pin 11 is inserted into the output shaft 2 and the drill sleeve 7 of the working head 3 to keep the output shaft 2 and the working head 3 rotating. The end of the locking pin 11 is limited by the snap ring 12 to ensure that the working head 3 can rotate synchronously and coaxially when the output shaft 2 rotates. However, when the working head 3 is stuck by a tree stump or silt, restarting the drilling will cause the drilling to overload or short-circuit. Therefore, it is necessary to reverse the working head 3 and unscrew it from the original drilling path. However, if the working head 3 and the drilling body 1 are not connected, directly reversing the drilling body 1 will cause the working head 3 to spin freely or the output shaft 2 to be damaged, making it impossible to remove the working head 3 intact.

[0030] like Figure 3 As shown, the pin 6 has a bent portion 601 and an insertion portion 602, both of which are L-shaped. The bent portion 601 facilitates the rotation or lateral movement of the pin 6.

[0031] When drilling with a ground drill, if the working head 3 gets stuck in silt or tree stumps, making it impossible to remove, simply insert the pin 6 into the through shaft hole 8 and rotate the pin 6. The positioning shaft on the pin 6 will then press against the limiting part 501 on the pin fixing bracket 5, thus completing the fixed connection between the working head 3, the output shaft 2 and the bracket fixing plate 4. This is also equivalent to fixing it to the ground drill body 1. At this point, reversing the ground drill body 1 will allow the working head 3 to be unscrewed without damaging the ground drill.

[0032] The various embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of this application. The foregoing embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An anti-rotation structure for a ground drill bit, comprising a ground drill body, wherein a power source and a gearbox are disposed within the ground drill body, the gearbox includes an output shaft, and a working head is mounted on the end of the output shaft, the two being connected; Its features are, It also includes a bracket fixing plate, a pin fixing bracket, and a pin. The bracket fixing plate is fixedly installed on the main body of the ground drill, and the pin fixing bracket is fixedly installed on the bracket fixing plate. The pin passes through both the bracket fixing plate and the pin fixing bracket. The working head is provided with a drill sleeve, which is connected to the end of the output shaft. The drill sleeve and the output shaft have a through shaft hole that can keep them coaxial. The pin can slide on the pin fixing bracket and be inserted into the through shaft hole, so that the working head, output shaft and bracket fixing plate are locked and connected synchronously.

2. The anti-rotation structure of a ground drill bit according to claim 1, characterized in that, The pin is provided with a positioning pin, and a spring is sleeved on the pin. The spring is placed between the positioning pin and the pin fixing bracket. The pin fixing bracket is provided with a limiting part. The pin can drive the positioning pin to move towards the output shaft and abut against the limiting part, and cannot retract. The spring applies a force to the positioning pin abutting against the limiting part.

3. The anti-rotation structure of a ground drill bit according to claim 2, characterized in that, The positioning pin is inserted in the diameter direction of the pin, and after the pin is displaced, it can rotate circumferentially to achieve a limiting engagement between the positioning pin and the limiting part.

4. The anti-rotation structure of a ground drill bit according to claim 2, characterized in that, The limiting part is a stamped and bent part integrally formed on the pin fixing bracket.

5. The anti-rotation structure of a ground drill bit according to claim 1, characterized in that, The bracket fixing plate is welded to the main body of the ground drill or connected by fasteners.

6. The anti-rotation structure of a ground drill bit according to claim 1, characterized in that, The bracket fixing plate is L-shaped, and one of the connecting surfaces of the pin fixing bracket and the bracket fixing plate is welded or connected by fasteners.

7. The anti-rotation structure of a ground drill bit according to claim 1, characterized in that, A locking pin is inserted into the output shaft and the drill sleeve of the working head to keep the output shaft and the working head rotating. The end of the locking pin is limited by a snap ring.

8. The anti-rotation structure of a ground drill bit according to claim 1, characterized in that, The pin has a bent portion and an insertion portion, both of which are L-shaped.

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