Circumferential rotation drive mechanism of drilling machine

Abstract

The present invention provides a circumferential rotation drive mechanism for a hole tapping machine, wherein a drill rod main shaft is arranged in a tubular cavity of a tubular body, and the drill rod main shaft connected to a cutting mechanism and a rotating drive mechanism performs circumferential rotation and axial displacement in the cavity of the tubular body, and is characterized in that: the power input end of the rotating drive mechanism is connected to a torsional power source, the lower end of the tubular body is connected to a rotating drive mechanism housing, the drill rod main shaft passes through a center hole of a power output gear in the rotating drive mechanism housing, and the drill rod main shaft and the power output gear form a circumferential synchronous and axial sliding fit; the lower end of the drill rod main shaft extending to the housing seat cavity connected to the lower part of the rotating drive mechanism housing is used to connect a tool, and the housing seat is connected to a pipe A to be tapped. The drill rod main shaft directly passes through the power output gear in the rotating drive mechanism housing, and forms a circumferential synchronous rotation and axial relative movement fit with the power output gear.

Description

Technical Field

[0001] The invention relates to a hole-opening device, and more specifically to a device for opening a through hole on a component such as a pipeline installed on site so as to input or output a medium. Background Art

[0002] In the prior art, it is often encountered that pipelines and other similar components have been installed, and for various reasons, holes need to be drilled in the pipeline to connect to the branch. Obviously, drilling operations need to be performed on site at this time. How to achieve on-site drilling is an urgent problem to be solved. Large or professional drilling equipment is difficult to arrive at the site to implement operations, especially the pipelines installed on site are often in a normal working state of conveying the medium. At this time, there are many factors that limit the drilling. Since the diameter of the pipeline A to be drilled is sometimes large, it is very common to have a diameter of 300mm or even larger. For larger pipes, the pipeline A to be drilled sometimes also needs a branch pipeline that is compatible with it. The situation where the hole diameter is 200mm is very common. In addition, due to differences in the applicable environment, there are also many choices for pipe materials, such as steel pipes, cast iron and plastic materials. The scope of application of the manual drilling machine in the prior art is severely limited. In addition, the drilling efficiency of the manual drilling machine is also relatively low. Summary of the invention

[0003] The invention discloses a circumferential rotation driving mechanism for a hole tapping machine, which reasonably arranges a rotation driving power transmission path to reduce the volume and weight of the entire machine.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a circumferential rotation drive mechanism of a hole opening machine, a drill rod main shaft is arranged in the tubular cavity of a tubular body, and the drill rod main shaft connected to a feed mechanism and a rotation drive mechanism performs circumferential rotation and axial displacement movement in the cavity of the tubular body, characterized in that: the power input end of the rotation drive mechanism is connected to a torsional power source, the lower end of the tubular body is connected to a housing of the rotation drive mechanism, the drill rod main shaft passes through the center hole of a power output gear in the housing of the rotation drive mechanism, and the drill rod main shaft and the power output gear form a circumferential synchronous and axial sliding fit; the lower end of the drill rod main shaft extending to the housing seat cavity connected to the lower part of the housing of the rotation drive mechanism is used to connect a tool, and the housing seat is connected to a pipe A to be opened.

[0005] In the above scheme, the drill rod main shaft is directly passed through the power output gear in the housing of the rotary drive mechanism, and cooperates with the power output gear to form circumferential synchronous rotation and axial relative movement, thereby reducing the transmission path between the drill rod main shaft and the power input end of the rotary drive mechanism, simplifying the torque transmission path, and naturally simplifying the structure of the torque transmission mechanism, reducing the weight of the entire hole opening machine, and bringing convenience to the storage and transportation of the hole opening machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a structural principle diagram of the present invention;

[0007] Figure 2 yes Figure 1 A partial enlarged view of

[0008] Figure 3 , 4 They are Figure 2 AA and BB cross-sectional views. DETAILED DESCRIPTION

[0009] A circumferential rotation drive mechanism for a hole opening machine, wherein a drill rod main shaft 20 is arranged in a tubular cavity of a tubular body 10, and the drill rod main shaft 20 connected to a feed mechanism 60 and a rotation drive mechanism 40 performs circumferential rotation and axial displacement movement in the cavity of the tubular body 10, the power input end of the rotation drive mechanism 40 is connected to a torsional power source, the lower end of the tubular body 10 is connected to a rotation drive mechanism housing 41, the drill rod main shaft 20 passes through a center hole of a power output gear 42 in the rotation drive mechanism housing 41, and the drill rod main shaft 20 and the power output gear 42 form a circumferential synchronous and axial sliding fit; the lower end of the drill rod main shaft 20 extending to the cavity of a shell seat 30 connected to the lower part of the rotation drive mechanism housing 41 is used to connect a tool, and the shell seat 30 is connected to a pipe A to be opened.

[0010] The above-mentioned scheme provided by the present invention is to open a through hole in the middle of the power output gear 42 in the rotary drive mechanism box 41 for the drill rod main shaft 20 to pass through, and combine the power output function of the power output gear 42 with the power input function of the drill rod main shaft 20. Such a setting will inevitably simplify the power transmission path for the drill rod main shaft 20 to obtain torque, and at least reduce one pair of gear pairs. While simplifying the mechanism, it will inevitably reduce the volume and weight of the hole opening machine. In addition, for the entire hole opening machine, the rotary drive mechanism box 41 is at a low position, so the center of gravity of the whole machine is relatively low, which makes it more stable when connected to the pipe A to be opened and during the hole opening operation.

[0011] The preferred solution is that a main shaft sleeve 43 is rotatably arranged in the rotating drive mechanism box 41, the tubular drill pipe main shaft 20 is inserted into the main shaft sleeve 43 and the two constitute circumferential synchronous rotation and axial displacement cooperation, and the power output gear 42 is coaxial and circumferentially synchronously rotated on the main shaft sleeve 43. Since the main shaft sleeve 43 has the ability to rotate circumferentially relative to the rotary drive mechanism housing 41, the drill pipe main shaft 20 that cooperates with the main shaft sleeve 43 to rotate synchronously in the circumferential direction naturally also has the ability to rotate. The power of the rotational motion first comes from the rotational torque obtained by the power output gear 42, and then is transmitted to the main shaft sleeve 43 and the drill pipe main shaft 20. The drill pipe main shaft 20 located at the lower end of the main shaft sleeve 43 and also belonging to the housing area of ​​the shell seat 30 is connected with a tool holder connecting plate, and the tool holder connecting plate is used to connect a tool of corresponding specifications. It can be seen that the tool is arranged directly adjacent to the lower end of the main shaft sleeve 43. Even during the hole-opening operation when the drill pipe main shaft 20 moves downward, the tool and the lower end of the main shaft sleeve 43 are very short. Therefore, even if the tubular drill pipe main shaft 20 between the tool and the main shaft sleeve 43 is subjected to a large torque, its torsional deformation is very small, and torsional damage will not occur. In addition, while its weight is reduced, an optimal connection scheme for cooperating with the upper end feed mechanism is provided. The specific detailed scheme is described in detail in another application of this application. The drill rod main shaft 20 located above the main shaft sleeve 43 is only subjected to axial pressure during the hole-opening operation, and is almost not subjected to torsional torque, so its stroke length can be appropriately lengthened. In particular, when a gate valve needs to be added between the pipe clamp and the shell seat 30 during pressure hole-opening operations, the drill rod main shaft 20 can also provide sufficient stroke.

[0012] A more preferred solution is that the main shaft sleeve 43 extends downward to the inner top of the shell seat 30 .

[0013] In order to fix the main shaft sleeve 43 and the power output gear 42, the present invention provides the following preferred scheme, the upper part of the main shaft sleeve 43 has a radial flange 431 that is supported on the lower end face of the inner ring of the upper bearing 411, the outer ring of the upper bearing 411 is located at the mounting hole of the rotary drive mechanism housing 41, the middle and lower sections of the main shaft sleeve 43 are in the shape of a stepped shaft with a larger upper portion and a smaller lower portion, the upper end face of the power output gear 42 abuts against the large and smaller stepped shaft faces, the boss extending downward at the lower end face of the power output gear 42 presses against the upper end face of the inner ring of the lower bearing 412, and the through hole edge of the top shell of the shell seat 30 is supported on the lower end face of the outer ring of the lower bearing 412.

[0014] When a large diameter branch pipe needs to be connected to the pipe A to be drilled, and the material hardness and strength of the pipe A to be drilled are both high, and it is difficult to provide power manually as a torsional power source, an electric power source can be selected. At this time, the motor 50 serving as the torsional power source is arranged on the rotating drive mechanism box 41, and the rotating shaft 51 of the motor 50 is coaxially connected to the power input shaft 44 to transmit torque, and the power input gear 441 on the power input shaft 44 and the power output gear 42 form a gear transmission mechanism to transmit torque.

[0015] In order to provide an appropriate rotational speed, when drilling a hole requires low speed and high torque, the solution is to form a gear transmission mechanism between the power input gear 441 and the power output gear 42 through the first gear shaft 45 or the gears on the first gear shaft 45 and the second gear shaft 46 in sequence.

[0016] In order to ensure that the drilling is performed under the working condition that the pipeline A to be drilled is under normal medium transmission, a skeleton seal 61 is provided in the annular area surrounded by the lower bearing 412, the main shaft sleeve 43 and the shell seat 30, and a seal 62 is provided between the main shaft sleeve 43 and the drill pipe main shaft 20. In this way, the matching gaps between the relevant components are sealed to prevent the leakage of liquid and gaseous media.

[0017] Combination Figure 3 , 4 As shown, the lumen of the main shaft sleeve 43 is a non-circular cross section, the lower section of the drill rod main shaft 20 has a cross-sectional profile that matches the non-circular cross section of the main shaft sleeve 43, the sealing ring 62 disposed between the two has a profile that matches the non-circular cross section, and the main shaft sleeve 43 and the power output gear 42 are connected by a key. The corresponding non-circular cross section of the outer circumference of the drill rod main shaft 20 can be Figure 3 The cylindrical surface shown in the figure is a cylindrical portion remaining after a small portion of the cylindrical surface is cut off parallel to the axis core, and the arc length of the cut-off portion can be one 4 to 6 of the entire circumference.

Claims

1. A circumferential rotation drive mechanism for a hole tapping machine, wherein a drill rod main shaft (20) is arranged in a tubular cavity of a tubular body (10), and the drill rod main shaft (20) connected to a feed mechanism performs circumferential rotation and axial displacement movement in the cavity of the tubular body (10), characterized in that: The power input end of the rotary drive mechanism (40) is connected to a torsional power source, the lower end of the tubular body (10) is connected to a rotary drive mechanism housing (41), the drill rod main shaft (20) passes through a central hole of a power output gear (42) in the rotary drive mechanism housing (41), and the drill rod main shaft (20) and the power output gear (42) form a circumferentially synchronous and axially sliding fit; the lower end of the drill rod main shaft (20) extending to the lower part of the rotary drive mechanism housing (41) and inside the chamber of the housing seat (30) connected thereto is used for connecting a tool, and the housing seat (30) is connected to a pipe A to be drilled; The upper part of the main shaft sleeve (43) has a radial flange (431) supported on the lower end surface of the inner ring of the upper bearing (411), the outer ring of the upper bearing (411) is located at the mounting hole of the rotary drive mechanism housing (41), the middle and lower sections of the main shaft sleeve (43) are in the shape of a stepped shaft with a larger upper portion and a smaller lower portion, the upper end surface of the power output gear (42) abuts against the larger upper and smaller lower stepped shaft surfaces, the boss extending downward at the lower end surface of the power output gear (42) presses against the upper end surface of the inner ring of the lower bearing (412), and the through hole of the upper top shell of the housing seat (30) is supported on the lower end surface of the outer ring of the lower bearing (412); A skeleton seal (61) is provided in an annular area surrounded by the lower bearing (412), the main shaft sleeve (43) and the housing seat (30), and a sealing ring (62) is provided between the main shaft sleeve (43) and the drill pipe main shaft (20).

2. The circumferential rotation drive mechanism of the drilling machine according to claim 1, characterized in that: A main shaft sleeve (43) is rotatably disposed in the rotary drive mechanism housing (41), a tubular drill rod main shaft (20) is inserted into the main shaft sleeve (43), and the two are configured to synchronously rotate in the circumferential direction and to cooperate in axial displacement, and the power output gear (42) is coaxially disposed on the main shaft sleeve (43) and synchronously rotates in the circumferential direction.

3. The circumferential rotation drive mechanism of the drilling machine according to claim 1 or 2, characterized in that: The main shaft sleeve (43) extends downward to the inner top of the housing seat (30).

4. The circumferential rotation drive mechanism of the drilling machine according to claim 1 or 2, characterized in that: A motor (50) serving as a torsional power source is disposed on a rotary drive mechanism housing (41); a rotating shaft (51) of the motor (50) is coaxially connected to a power input shaft (44) to transmit torque; a power input gear (441) on the power input shaft (44) and a power output gear (42) form a gear transmission mechanism to transmit torque.

5. The circumferential rotation driving mechanism of the drilling machine according to claim 4, characterized in that: A gear transmission mechanism is formed between the power input gear (441) and the power output gear (42) through the first gear shaft (45) or the gears on the first gear shaft (45) and the second gear shaft (46) in sequence.

6. The circumferential rotation driving mechanism of the drilling machine according to claim 3, characterized in that: The lumen of the main shaft sleeve (43) has a non-circular cross section, the lower section of the drill rod main shaft (20) has a cross-sectional profile that matches the non-circular cross section lumen of the main shaft sleeve (43), the sealing ring (62) disposed between the two has a profile that matches the non-circular cross section, and the main shaft sleeve (43) is connected to the power output gear (42) by a key.

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