Piston type self-balancing mechanical reaming device

Abstract

The utility model belongs to the technical field of mechanical reaming, particularly relates to a piston type self-balancing mechanical reaming device, and aims to solve the problems that abrasion of equipment components such as a drill rod, a rotating piece and a tool arm is accelerated due to high-speed rotation of an existing drill bit, and in the high-speed rotation process, if the device breaks down or is operated improperly, the device is damaged. According to the scheme, the device comprises a connector, a device shell is fixed to the tail end of the connector, and a reaming mechanism used for reaming is arranged in the device shell; the reaming mechanism comprises a guide rod. The guide rod is pushed to horizontally move in the device shell, so that the tooth grooves in the guide rod are meshed with the conical ball head teeth to rotate, the two cutter bar bodies are rotated to extend out respectively, rotary reaming is carried out through the cutter grooves formed in the cutter bar bodies, and when the device is used, too high rotating speed is not needed, and machining efficiency is greatly improved. And the condition that the service life of the device is influenced due to overhigh rotating speed is reduced.

Description

Technical Field

[0001] The utility model relates to a mechanical hole enlarging device, in particular to a piston-type self-balancing mechanical hole enlarging device, belonging to the technical field of mechanical hole enlarging. Background Art

[0002] Mechanical hole reamer uses mechanical force and rotational motion to expand the diameter of a hole. It is widely used in various industrial fields requiring hole reaming, such as machinery manufacturing, aerospace, petrochemicals, and automotive manufacturing. During coal mining, problems such as the small diameter of previously drilled gas extraction holes or water accumulation within them can hinder effective gas extraction, necessitating hole reaming and permeability enhancement.

[0003] In the prior art, a hole enlarging and permeability-enhancing drilling tool, such as that disclosed in announcement number CN220667451U, includes a rotating member, a drill bit connected to one axial end of the rotating member, and a drill rod connected to the other axial end of the rotating member. The rotating member is cylindrical in structure, and a plurality of receiving grooves are provided on the outer wall of the rotating member at equal intervals along the circumference of the rotating member. The length direction of the receiving grooves is consistent with the axial direction of the rotating member. A knife arm is provided in the receiving groove and is pin-connected to the inner wall of the receiving groove. A through-hole is provided at the center of the rotating member, which is consistent with the axial direction of the rotating member. The drill rod drives the rotating member and the drill bit to rotate at high speed. When the rotating member rotates at high speed, the knife arm in the receiving groove extends from the receiving groove under the action of centrifugal force and cuts the inner wall of the drill hole outside the rotating member, thereby achieving a hole enlarging effect.

[0004] Although the above technical solution drives the rotating part and the drill bit to rotate at high speed by the drill rod, when the rotating part rotates at high speed, the knife arm in the accommodating groove will extend from the accommodating groove under the action of centrifugal force and cut the inner wall of the drill hole outside the rotating part, thereby achieving the hole expansion effect. However, when it is used, the drill bit needs to rotate at high speed to ensure that the knife arm extends to cut and expand the hole. However, the high-speed rotation of the drill bit will accelerate the wear of equipment components such as the drill rod, the rotating part, and the knife arm. In addition, during the high-speed rotation process, if the device fails or is improperly operated, it may cause serious safety accidents. In view of this, a piston-type self-balancing mechanical hole expansion device is provided to overcome the above-mentioned defects. Utility Model Content

[0005] The utility model provides a piston-type self-balancing mechanical reaming device to solve the above-mentioned problem that the high-speed rotation of the drill bit will accelerate the wear of equipment components such as the drill rod, rotating parts, and cutter arms, and if the device fails or is improperly operated during the high-speed rotation process, serious safety accidents may occur.

[0006] The utility model achieves the above-mentioned object through the following technical solutions: a piston-type self-balancing mechanical reaming device, comprising a connector, a device housing is fixed to the end of the connector, and a reaming mechanism for reaming the hole is provided inside the device housing;

[0007] The reaming mechanism includes a guide rod, which is arranged inside the device housing. A plurality of tooth grooves are equidistantly provided on the outer surface of the guide rod. Conical ball teeth are connected to both sides of the guide rod. A knife rod body is fixed on one side of the two conical ball teeth. A plurality of knife grooves are equidistantly provided on the inner walls of the two knife rod bodies. Sealing mechanisms are provided at both ends of the guide rod. A filtering mechanism for filtering is fixed to the end of the device housing.

[0008] As a further solution of the present invention: the interiors of the two conical ball-head teeth are both plugged and connected with fixing pins, and the fixing pins are rotatably connected to the device housing.

[0009] As a further solution of the present invention: the sealing mechanism includes a first sealing ring, and two first sealing rings are provided. The two first sealing rings are both placed at both ends of the guide rod, and both ends of the guide rod are provided with sealing grooves matching the first sealing rings.

[0010] As a further solution of the present invention: a second sealing ring is fixed to the inner wall of the connecting head.

[0011] As a further solution of the present invention: a fixing hole is opened on the inner wall of the device housing, and the fixing hole is plug-connected with the fixing pin.

[0012] As a further solution of the present invention: two knife bar grooves are symmetrically provided on the outer wall of the device housing, and a sleeve is fixed on the inner wall of the device housing.

[0013] As a further solution of the present invention: the filtering mechanism includes a filter plate, which is placed at the end of the device housing, and an elastic retaining ring is provided on the right side of the filter plate and is engaged with the device housing.

[0014] The beneficial effect of the utility model is that by pushing the guide rod to move horizontally inside the device housing, the tooth grooves on the guide rod engage the tapered ball teeth to rotate, and the two tool rod bodies are rotated and extended respectively, and the tool grooves provided on the tool rod bodies are used to rotate and expand the hole. When the device is in use, it does not require an excessively high rotation speed, thereby reducing the life of the device due to excessively high rotation speed.

[0015] Through the fixing pin in the tapered ball tooth, in cooperation with the fixing hole, the stability of the tapered ball tooth during rotation can be ensured, which plays a role of guide limit. The sealing groove arranged on the guide rod can further play a sealing role in cooperation with the first sealing ring, thereby reducing the leakage of hydraulic oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure of the housing of the device of the present invention;

[0018] Figure 3 This is a schematic diagram of the internal structure of the housing of the device of the present invention;

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the guide rod of the utility model.

[0020] In the figure: 1. Connector; 2. Device housing; 3. Guide rod; 31. Tooth groove; 32. Tapered ball head tooth; 33. Cutter body; 34. Cutter groove; 35. Fixing pin; 4. First sealing ring; 41. Sealing groove; 5. Second sealing ring; 6. Fixing hole; 7. Cutter groove; 8. Sleeve; 9. Filter plate; 91. Elastic retaining ring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example 1, as Figures 1 to 4 As shown, a piston-type self-balancing mechanical reaming device includes a connector 1, a device housing 2 is fixed to the end of the connector 1, and a reaming mechanism for reaming the hole is provided inside the device housing 2;

[0023] The reaming mechanism includes a guide rod 3, which is arranged inside the device housing 2. A number of tooth grooves 31 are equidistantly provided on the outer surface of the guide rod 3. Conical ball teeth 32 are connected to both sides of the guide rod 3. A tool rod body 33 is fixed on one side of the two conical ball teeth 32. A number of knife grooves 34 are equidistantly provided on the inner walls of the two tool rod bodies 33. A sealing mechanism for sealing is provided at both ends of the guide rod 3. A filtering mechanism for filtering is fixed at the end of the device housing 2. The interior of the two conical ball teeth 32 are plugged and connected with a fixing pin 35. The fixing pin 35 is rotationally connected to the device housing 2. The external hydraulic oil is transported to the connector 1, thereby pushing the guide rod 3 to move horizontally inside the device housing 2, so that the tooth grooves 31 on the guide rod 3 engage the conical ball teeth 32 to rotate, and the two tool rod bodies 33 are rotated and extended respectively, and the knife grooves 34 opened on the tool rod body 33 are then rotated to expand the hole. When the device is in use, the rotation speed does not need to be too high, thereby reducing the life of the device caused by excessive rotation speed.

[0024] Embodiment 2. In addition to all the technical features of embodiment 1, this embodiment also includes: the sealing mechanism includes a first sealing ring 4, two first sealing rings 4 are provided, and the two first sealing rings 4 are both arranged at both ends of the guide rod 3. Both ends of the guide rod 3 are provided with sealing grooves 41 matching the first sealing ring 4. The inner wall of the connecting head 1 is fixed with a second sealing ring 5, and the inner wall of the device housing 2 is provided with a fixing hole 6. The fixing hole 6 is plug-connected with the fixing pin 35. With the cooperation of the fixing hole 6, the stability of the conical ball head tooth 32 during rotation can be guaranteed, which plays a role of guiding and limiting. The sealing groove 41 provided on the guide rod 3 can further play a sealing role with the cooperation of the first sealing ring 4, thereby reducing the leakage of hydraulic oil.

[0025] Embodiment 3. In addition to all the technical features of Embodiment 1, this embodiment also includes: two arbor grooves 7 are symmetrically provided on the outer wall of the device housing 2, a sleeve 8 is fixed to the inner wall of the device housing 2, and the filtering mechanism includes a filter plate 9. The filter plate 9 is placed at the end of the device housing 2, and an elastic retaining ring 91 is provided on the right side of the filter plate 9 to be engaged with the device housing 2. The filter plate 9 can play a filtering role. By removing the elastic retaining ring 91, the filter plate 9 can be disassembled for easy replacement.

[0026] Before using the piston-type self-balancing mechanical reaming device, the device is assembled first, and the device housing 2 and the output shaft of the driving device are connected and fixed, and the hydraulic oil pipe outside the connector 1 is connected, and the second sealing ring 5 inside the connector 1 can play a sealing role. When in use, the driving device drives the device housing 2 to feed and rotate, and at the same time, the external hydraulic oil is transported to the connector 1, thereby pushing the guide rod 3 to move horizontally inside the device housing 2, so that the tooth groove 31 on the guide rod 3 engages the conical ball head tooth 32 to rotate, and the two tool rod bodies 33 are rotated and extended respectively, and the tool groove 34 opened on the tool rod body 33 is used to rotate and expand the hole. A fixing pin 35 is provided in the conical ball head tooth 32, which is fixed in the fixing hole 6. With the cooperation of , the stability of the conical ball head tooth 32 during rotation can be guaranteed, and it plays the role of guide limit, and the sealing groove 41 provided on the guide rod 3 can further play a sealing role with the cooperation of the first sealing ring 4, thereby reducing the leakage of hydraulic oil. A sleeve 8 is fixed in the connector 1, and the filter plate 9 provided can play a filtering role. By removing the elastic retaining ring 91, the filter plate 9 can be disassembled for easy replacement. After use, the external hydraulic oil drive equipment stops running, thereby causing the guide rod 3 to lose thrust, and after the device housing 2 is removed from the hole, the tool rod body 33 retracts into the tool rod groove 7, and the device does not require too high a speed when in use, thereby reducing the device from having too high a speed and affecting its life.

[0027] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

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

Claims

1. A piston-type self-balancing mechanical reaming device, comprising a connector (1), characterized in that: A device housing (2) is fixed to the end of the connector (1), and a hole enlarging mechanism for enlarging the hole is provided inside the device housing (2); The reaming mechanism comprises a guide rod (3), the guide rod (3) being arranged inside the device housing (2), the outer surface of the guide rod (3) being provided with a plurality of tooth grooves (31) at equal intervals, both sides of the guide rod (3) being connected with conical ball teeth (32), one side of each of the two conical ball teeth (32) being fixed with a knife rod body (33), the inner walls of the two knife rod bodies (33) being provided with a plurality of knife grooves (34) at equal intervals, both ends of the guide rod (3) being provided with a sealing mechanism for sealing, and the end of the device housing (2) being fixed with a filtering mechanism for filtering.

2. A piston-type self-balancing mechanical reaming device according to claim 1, characterized in that: A fixing pin (35) is plugged into the interior of each of the two conical ball-head teeth (32), and the fixing pin (35) is rotationally connected to the device housing (2).

3. The piston-type self-balancing mechanical reaming device according to claim 1, characterized in that: The sealing mechanism comprises a first sealing ring (4), two first sealing rings (4) are provided, and the two first sealing rings (4) are both arranged at both ends of the guide rod (3), and both ends of the guide rod (3) are provided with sealing grooves (41) matching the first sealing rings (4).

4. The piston-type self-balancing mechanical reaming device according to claim 1, characterized in that: A second sealing ring (5) is fixed to the inner wall of the connector (1).

5. The piston-type self-balancing mechanical reaming device according to claim 1, characterized in that: A fixing hole (6) is provided on the inner wall of the device housing (2), and the fixing hole (6) is plug-connected to the fixing pin (35).

6. The piston-type self-balancing mechanical reaming device according to claim 5, characterized in that: Two arbor grooves (7) are symmetrically formed on the outer wall of the device housing (2), and a sleeve (8) is fixed to the inner wall of the device housing (2).

7. The piston-type self-balancing mechanical reaming device according to claim 1, characterized in that: The filtering mechanism comprises a filter plate (9), which is arranged at the end of the device housing (2). An elastic retaining ring (91) is provided on the right side of the filter plate (9) and is engaged with the device housing (2).

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