阅读说明：本技术 对穿金属管用开孔机及开孔方法 (Perforating machine and perforating method for opposite-penetrating metal pipe ) 是由 於清 汪柱 于 2021-07-27 设计创作，主要内容包括：本发明涉及一种对穿金属管用开孔机及开孔方法,属于金属管开孔设备领域。本发明包括底座机构、升降机构和动力机构,升降机构安装在底座机构上,动力机构安装在升降机构上；底座机构包括底座、前导柱、后导柱、水平仪和抱紧装置,前导柱、后导柱、水平仪和抱紧装置均安装在底座上,水平仪通过波形垫圈安装在底座上,前导柱和后导柱各与一个抱紧装置配合,前导柱与后导柱对称设置；抱紧装置包括磨擦垫片、抱紧螺杆、抱紧螺母、链条把手、链条垫片和链条,抱紧螺杆通过抱紧螺母安装在底座的一侧,磨擦垫片设置在抱紧螺母与底座之间,链条把手安装在抱紧螺母上,链条垫片安装在底座的另一侧,链条的一端与抱紧螺杆连接,链条的另一端与链条垫片配合。(The invention relates to a tapping machine and a tapping method for a through metal pipe, and belongs to the field of metal pipe tapping equipment. The invention comprises a base mechanism, a lifting mechanism and a power mechanism, wherein the lifting mechanism is arranged on the base mechanism, and the power mechanism is arranged on the lifting mechanism; the base mechanism comprises a base, a front guide pillar, a rear guide pillar, a level gauge and a holding device, wherein the front guide pillar, the rear guide pillar, the level gauge and the holding device are all arranged on the base; the holding device comprises a friction gasket, a holding screw rod, a holding nut, a chain handle, a chain gasket and a chain, the holding screw rod is installed on one side of the base through the holding nut, the friction gasket is arranged between the holding nut and the base, the chain handle is installed on the holding nut, the chain gasket is installed on the other side of the base, one end of the chain is connected with the holding screw rod, and the other end of the chain is matched with the chain gasket.)

1. The utility model provides a to wearing tapping machine for metal tube which characterized in that: the lifting mechanism (B) is arranged on the base mechanism (A), and the power mechanism (C) is arranged on the lifting mechanism (B); the base mechanism (A) comprises a base (A1), a front guide pillar (A2), a rear guide pillar (A3), a level meter (A4) and a holding device (A5), wherein the front guide pillar (A2), the rear guide pillar (A3), the level meter (A4) and the holding device (A5) are all arranged on the base (A1), and the front guide pillar (A2) and the rear guide pillar (A3) are respectively matched with one holding device (A5); the lifting mechanism (B) comprises a sliding frame (B1), a gear shaft (B4), a handle gear (B5), a clockwork spring (B7) and a handle (B9), the gear shaft (B4) is installed on the sliding frame (B1), the handle gear (B5) is installed on the gear shaft (B4), the clockwork spring (B7) is matched with the gear shaft (B4), the handle (B9) is connected with the gear shaft (B4), the sliding frame (B1) is installed on a front guide post (A2) and a rear guide post (A3), and the power mechanism (C) is installed on the sliding frame (B1).

2. The tapping machine for pierced metal pipes as claimed in claim 1, wherein: embrace device (A5) including embracing screw rod (A52), embracing nut (A53), chain gasket (A55) and chain (A56), embrace screw rod (A52) and install the one side at base (A1) through embracing nut (A53) tightly, the opposite side at base (A1) is installed in chain gasket (A55), the one end and the screw rod (A52) of embracing of chain (A56) are connected, the other end and the cooperation of chain gasket (A55) of chain (A56).

3. The tapping machine for pierced metal pipes as set forth in claim 2, wherein: the clasping device (A5) further comprises a friction washer (A51), and the friction washer (A51) is arranged between the clasping nut (A53) and the base (A1).

4. The tapping machine for pierced metal pipes as claimed in claim 1, wherein: base (A1) includes base body (A11), chucking groove (A12) and taut seat (A13), chucking groove (A12) and the both sides of straining seat (A13) setting at base body (A11) respectively, the bottom of base body (A11) is the setting of V style of calligraphy structure, the top at chucking groove (A12) is installed in chain gasket (A55), it installs on straining seat (A13) through embracing tight nut (A53) to embrace screw rod (A52).

5. The tapping machine for pierced metal pipes as claimed in claim 1, wherein: elevating system (B) still includes connecting rod (B2) and connector (B3), install on balladeur train (B1) connecting rod (B2), install on connecting rod (B2) connector (B3).

6. The tapping machine for pierced metal pipes as set forth in claim 5, wherein: elevating system (B) still includes spring lid (B8), install on gear shaft (B4) spring lid (B8), the one end and the spring lid (B8) of clockwork spring (B7) are connected, the other end and the balladeur train (B1) of clockwork spring (B7) are connected.

7. The tapping machine for pierced metal pipes as claimed in claim 1, wherein: the sliding frame (B1) comprises a sliding frame body (B11), a front guide sleeve (B12) and a rear guide sleeve (B13), wherein the front guide sleeve (B12) and the rear guide sleeve (B13) are respectively arranged on two sides of the sliding frame body (B11).

8. The tapping machine for pierced metal pipes as claimed in claim 7, wherein: the front guide sleeve (B12) and the rear guide sleeve (B13) are respectively arranged on a front guide post (A2) and a rear guide post (A3), a rack is arranged on the front guide post (A2), and the handle gear (B5) is meshed with the rack.

9. The tapping machine for pierced metal pipes as claimed in claim 1, wherein: power unit (C) includes gear box lid (C1), gear box body (C2), motor lid (C3), one-level speed reduction assembly (C4), second grade speed reduction assembly (C5), tertiary speed reduction assembly (C6) and motor assembly (C7), one-level speed reduction assembly (C4) is connected with motor assembly (C7), second grade speed reduction assembly (C5) is connected with one-level speed reduction assembly (C4), tertiary speed reduction assembly (C6) is connected with second grade speed reduction assembly (C5), motor lid (C3) is installed on motor assembly (C7), gear box body (C2) is installed on motor lid (C3), gear box lid (C1) is installed on gear box body (C2).

10. A tapping method of a tapping machine for a through metal pipe is characterized in that: the hole opening method comprises the following steps: the pipe fitting is tightly held by a holding device (A5), a handle (B9) controls a sliding frame (B1) to move downwards along a front guide post (A2) and a rear guide post (A3), a power mechanism (C) drives a connecting rod (B2) and a connecting head (B3) to rotate, a punching function is realized through a center drill arranged on the connecting head (B3), and after punching is finished, automatic resetting of the sliding frame (B1) is realized through a clockwork spring (B7), so that the sliding frame (B1) moves upwards along the front guide post (A2) and the rear guide post (A3).

Technical Field

The invention relates to a tapping machine and a tapping method for a through metal pipe, and belongs to the field of metal pipe tapping equipment.

Background

In the process of laying pipelines (such as steel pipes), two steel pipes with different diameters are connected, holes need to be formed in the steel pipes with large diameters, and two hole-mounting mechanical four-way joints which pass through the centers of the pipelines on a straight line need to be formed in many times.

The great pipeline of diameter is difficult to satisfy to wearing to the most stroke of current market tapping machine, the hole saw contact surface is pipeline axial direction when beating upper hole, the hole saw atress is even basically, the hole saw contact surface is radial direction when boring the second hole, when the connecting rod is nevertheless pipeline center, the unilateral atress of hole saw meeting produces great vibrations, make the tapping machine do not have disposable two hole ability of opening, it can increase work load and can't guarantee the axiality of trompil to have processed the machine to rotate the another side trompil after one side.

There is the processing trompil precision among the prior art low, can't hold tightly the pipeline during the trompil, rock easily, and the balladeur train stroke is shorter, need the manual work to reset the balladeur train after punching, and the in-process vibrations are great, rock easily, and motor assembly occupies the great scheduling problem of spatial position.

Therefore, how to solve the above problems is a problem to be solved urgently.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides the tapping machine for the through metal pipe and the tapping method, which have the advantages of reasonable structural design, large stroke, good coaxiality and high stability, are suitable for two holes to be punched at one time, and meet the requirement of a user for punching two holes when using a four-way pipe joint.

The technical scheme adopted by the invention for solving the problems is as follows: this to wearing tapping machine for metal tube, its structural feature lies in: the lifting mechanism is arranged on the base mechanism, and the power mechanism is arranged on the lifting mechanism; the base mechanism comprises a base, a front guide pillar, a rear guide pillar, a level meter and a holding device, wherein the front guide pillar, the rear guide pillar, the level meter and the holding device are all arranged on the base, and the front guide pillar and the rear guide pillar are respectively matched with one holding device; the lifting mechanism comprises a sliding frame, a gear shaft, a handle gear, a clockwork spring and a handle, wherein the gear shaft is arranged on the sliding frame, the handle gear is arranged on the gear shaft, the clockwork spring is matched with the gear shaft, the handle is connected with the gear shaft, the sliding frame is arranged on a front guide post and a rear guide post, and the power mechanism is arranged on the sliding frame.

Further, hold the device tightly including holding the screw rod tightly, holding nut tightly, chain gasket and chain, hold the screw rod tightly and install the one side at the base through holding the nut tightly, the opposite side at the base is installed to the chain gasket, the one end of chain with hold the screw rod tightly and be connected, the other end and the chain gasket cooperation of chain.

Furthermore, the clasping device also comprises a friction gasket, and the friction gasket is arranged between the clasping nut and the base.

Further, the clasping device further comprises a chain handle, and the chain handle is installed on the clasping nut.

Further, the base includes base body, chucking groove and tension seat set up respectively in base body's both sides, base body's bottom is the setting of V style of calligraphy structure, the chain gasket is installed in the top in chucking groove, hold the screw rod tightly and install on tension seat through holding the nut tightly.

Furthermore, the front guide post and the rear guide post are symmetrically arranged.

Further, the spirit level comprises an inner spirit level shell, a rear spirit level cover, a front spirit level cover and a spirit level bubble, wherein the spirit level bubble is installed in the inner spirit level shell, and the inner spirit level shell is installed in the rear spirit level cover and the front spirit level cover.

Further, the level is mounted on the base by a wave washer and a earless washer.

Further, elevating system still includes connecting rod and connector, the connecting rod is installed on the balladeur train, the connector is installed on the connecting rod.

Further, elevating system still includes the interior hexagonal joint, the handle passes through the interior hexagonal joint with the gear shaft and is connected.

Further, elevating system still includes the spring lid, the spring lid is installed on the gear shaft, clockwork spring's one end and spring lid are connected, clockwork spring's the other end and balladeur train are connected.

Further, the carriage comprises a carriage body, a front guide sleeve and a rear guide sleeve, wherein the front guide sleeve and the rear guide sleeve are respectively arranged on two sides of the carriage body.

Furthermore, the front guide sleeve and the rear guide sleeve are respectively arranged on the front guide post and the rear guide post, a rack is arranged on the front guide post, and the handle gear is meshed with the rack.

Further, the sliding frame further comprises a gear shaft seat, the gear shaft seat is arranged on the sliding frame body, and the gear shaft is installed on the gear shaft seat.

Further, the connecting rod is rotatably mounted in the middle of the carriage.

Furthermore, the power mechanism comprises a gearbox cover, a gearbox body, a motor cover, a primary speed reduction assembly, a secondary speed reduction assembly, a tertiary speed reduction assembly and a motor assembly, wherein the primary speed reduction assembly is connected with the motor assembly, the secondary speed reduction assembly is connected with the primary speed reduction assembly, the tertiary speed reduction assembly is connected with the secondary speed reduction assembly, the motor cover is installed on the motor assembly, the gearbox body is installed on the motor cover, and the gearbox cover is installed on the gearbox body.

Furthermore, the first-stage speed reduction assembly, the second-stage speed reduction assembly and the third-stage speed reduction assembly are all located in the gearbox body.

Furthermore, the power mechanism further comprises a positioning sleeve, and the positioning sleeve is installed between the gearbox cover and the gearbox body.

Further, the three-stage speed reduction assembly is connected with the connecting rod.

Further, another technical object of the present invention is to provide a tapping method for a tapping machine for a pierced metal pipe.

The technical purpose of the invention is realized by the following technical scheme.

A tapping method of a tapping machine for a through metal pipe is characterized in that: the hole opening method comprises the following steps: the pipe fitting is tightly held through the tightly holding device, the handle control sliding frame moves downwards along the front guide pillar and the rear guide pillar, the connecting rod and the connector are driven to rotate through the power mechanism, the punching function is realized through the center drill installed on the connector, and the automatic resetting of the sliding frame is realized through the clockwork spring after the punching is finished, so that the sliding frame moves upwards along the front guide pillar and the rear guide pillar.

Compared with the prior art, the invention has the following advantages: a rotatable level gauge is arranged on the base, so that a high-precision machining positioning target is realized; adopt the cohesion device of two chains, the bottom of base body adopts the strengthening rib to reduce the lifting surface area, and machine stability and fastness when greatly increased trompil (especially open the second hole).

The structure of the spring matched with the handle gear and the guide pillar meets the requirement of large-stroke automatic reset of the hole digger. The connecting rod is connected with the connector and is connected with the connector quickly and reliably without slipping, the connecting rod and the connector adopt the lug boss to transmit torque, and the connecting rod and the connector are fixed in position through the hexagon socket head cap screw, so that the mounting and dismounting are convenient. The handle can be integrally and quickly exchanged left and right, and can adapt to different operating environments and operating requirements.

The improved motor output shaft structure solves the problems that the connecting rod is longer when the double holes are formed, the vibration of the output shaft of the gear box is large, and the coaxiality is not good, the gear box output shaft and the connecting rod are easy to assemble and disassemble, particularly, the connecting rod is arranged in the bearing in a penetrating mode through the middle of the sliding frame, and the problem that the machined double holes are not coaxial due to the fact that the connecting rod shakes in the machining process is solved. The motor assembly is horizontally placed, so that the total height of the machine is reduced, and a space is reserved for arranging a handle; the secondary speed reduction assembly of the reduction box uses bevel gear transmission, so that the motor assembly can be horizontally placed.

Drawings

Fig. 1 is an exploded view of a tapping machine for a pierced metal pipe according to an embodiment of the present invention.

Fig. 2 is a front view of the base mechanism according to the embodiment of the present invention.

Fig. 3 is an enlarged schematic view of a portion I in fig. 2.

Fig. 4 is a left side view schematically illustrating the base mechanism according to the embodiment of the present invention.

Fig. 5 is a schematic illustration of an exploded view of a level according to an embodiment of the present invention.

Fig. 6 is a schematic front view of the lifting mechanism according to the embodiment of the present invention.

Fig. 7 is a schematic top view of the lifting mechanism according to the embodiment of the present invention.

Fig. 8 is an exploded view of the power mechanism according to the embodiment of the present invention.

In the figure: a base mechanism A, a lifting mechanism B, a power mechanism C,

A base A1, a front guide pillar A2, a rear guide pillar A3, a level A4, a clasping device A5,

A base body A11, a clamping groove A12, a tensioning seat A13,

A level inner shell A41, a level back cover A42, a level front cover A43, a level bulb A44,

Friction washer A51, holding screw A52, holding nut A53, chain handle A54, chain washer A55, chain A56,

A sliding frame B1, a connecting rod B2, a connecting head B3, a gear shaft B4, a handle gear B5, an inner hexagonal joint B6, a spring B7, a spring cover B8, a handle B9,

A carriage body B11, a front guide sleeve B12, a rear guide sleeve B13, a gear shaft seat B14,

The gearbox cover C1, the gearbox body C2, the motor cover C3, the primary speed reduction assembly C4, the secondary speed reduction assembly C5, the tertiary speed reduction assembly C6, the motor assembly C7 and the positioning sleeve C8.

Detailed Description

The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.

Examples are given.

Referring to fig. 1 to 8, it should be understood that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching the disclosure of the present specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the function and the achievable purpose of the present invention. In the present specification, the terms "upper", "lower", "left", "right", "middle" and "one" are used for clarity of description, and are not used to limit the scope of the present invention, and the relative relationship between the terms and the relative positions may be changed or adjusted without substantial technical changes.

The tapping machine for the through metal pipe in the embodiment (as shown in fig. 1) includes a base mechanism a, a lifting mechanism B and a power mechanism C, wherein the lifting mechanism B is installed on the base mechanism a, and the power mechanism C is installed on the lifting mechanism B.

The base mechanism a (as shown in fig. 2-5) in this embodiment includes a base a1, a front guide pillar a2, a rear guide pillar A3, a level a4, and a clasping device a5, wherein the front guide pillar a2, the rear guide pillar A3, the level a4, and the clasping device a5 are all mounted on the base a1, the level a4 is mounted on the base a1 through a wave washer, the front guide pillar a2 and the rear guide pillar A3 are respectively engaged with one clasping device a5, and the front guide pillar a2 and the rear guide pillar A3 are symmetrically arranged.

The clasping device A5 in the embodiment comprises a friction washer A51, a clasping screw A52, a clasping nut A53, a chain handle A54, a chain washer A55 and a chain A56, wherein the clasping screw A52 is installed on one side of a base A1 through the clasping nut A53, the friction washer A51 is arranged between the clasping nut A53 and the base A1, the chain handle A54 is installed on the clasping nut A53, the chain washer A55 is installed on the other side of the base A1, one end of the chain A56 is connected with the clasping screw A52, and the other end of the chain A56 is matched with the chain washer A55.

Base A1 in this embodiment includes base body A11, chucking groove A12 and taut seat A13, and chucking groove A12 sets up the both sides at base body A11 respectively with taut seat A13, and base body A11's bottom is the setting of V style of calligraphy structure, and chain gasket A55 installs in the top of chucking groove A12, and hug closely screw A52 and install on taut seat A13 through hugging closely nut A53.

The level A4 in this embodiment includes a level inner housing A41, a level rear cover A42, a level front cover A43 and a level bubble A44, a level bubble A44 is mounted in the level inner housing A41, and a level inner housing A41 is mounted in the level rear cover A42 and the level front cover A43.

The lifting mechanism B (shown in fig. 6-7) in this embodiment includes a carriage B1, a connecting rod B2, a connecting head B3, a gear shaft B4, a handle gear B5, a hexagon socket joint B6, a spiral spring B7, a spring cover B8, and a handle B9.

The connecting rod B2 and the gear shaft B4 in the embodiment are both mounted on the sliding frame B1, the connecting rod B2 is rotatably mounted in the middle of the sliding frame B1, the connecting head B3 is mounted on the connecting rod B2, the handle gear B5 and the spring cover B8 are both mounted on the gear shaft B4, the spring B7 is matched with the gear shaft B4, one end of the spring B7 is connected with the spring cover B8, the other end of the spring B7 is connected with the sliding frame B1, and the handle B9 is connected with the gear shaft B4 through the hexagon socket joint B6.

The carriage B1 in this embodiment includes a carriage body B11, a front guide sleeve B12, a rear guide sleeve B13, and a gear shaft base B14, the front guide sleeve B12 and the rear guide sleeve B13 are respectively provided on both sides of the carriage body B11, and the gear shaft base B14 is provided on the carriage body B11.

The front guide sleeve B12 and the rear guide sleeve B13 in the embodiment are respectively installed on a front guide post A2 and a rear guide post A3, the gear shaft B4 is installed on a gear shaft seat B14, a rack is arranged on the front guide post A2, and the handle gear B5 is meshed with the rack.

The power mechanism C (as shown in fig. 8) in this embodiment includes a transmission case cover C1, a transmission case body C2, a motor cover C3, a primary speed reduction assembly C4, a secondary speed reduction assembly C5, a tertiary speed reduction assembly C6, a motor assembly C7, and a positioning sleeve C8, and is mounted on the carriage B1.

In this embodiment, the first-stage deceleration assembly C4 is connected with the motor assembly C7, the second-stage deceleration assembly C5 is connected with the first-stage deceleration assembly C4, the third-stage deceleration assembly C6 is connected with the second-stage deceleration assembly C5, and the third-stage deceleration assembly C6 is connected with the connecting rod B2.

The motor cover C3 in the embodiment is installed on the motor assembly C7, the gearbox casing C2 is installed on the motor cover C3, the gearbox cover C1 is installed on the gearbox casing C2, the positioning sleeve C8 is installed between the gearbox cover C1 and the gearbox casing C2, and the primary speed reduction assembly C4, the secondary speed reduction assembly C5 and the tertiary speed reduction assembly C6 are all located in the gearbox casing C2.

Specifically, the tapping machine for the through metal pipe comprises a base A1, wherein the bottom of the base A1 is V-shaped and consists of reinforcing ribs; a front guide post A2, a rear guide post A3, a level A4 and a clasping device A5 are respectively arranged on a base A1; a carriage B1 is connected on the guide post, and the carriage B1 can slide on the guide post; the middle part of the sliding frame B1 is provided with a bearing, a connecting rod B2 with the upper end connected with the output shaft of the motor is arranged in the bearing in a penetrating way, the lower end of the connecting rod B2 is connected with a connecting head B3, and the connecting head B3 is connected with a hole digger and a central drill; the sliding block is provided with a gear shaft B4, the gear shaft B4 is provided with torsion through an inner hexagonal joint B6 and a handle B9, the gear shaft B4 is connected with and drives a handle gear B5 to rotate, and the handle gear B5 is meshed with teeth on the front guide pillar A2; the gear shaft B4 is also connected to a spring cover B8, and the spring cover B8 is connected to a spring B7 to provide the carriage B1 return force.

The base A1 is provided with two clasping devices A5, two guide post holes for mounting a front guide post A2 and a rear guide post A3, a hole saw hole and a level instrument hole, and the bottom of the base body A11 is V-shaped and consists of reinforcing ribs; two sides of the base body A11 are respectively provided with a clamping groove A12 and a tensioning seat A13; a chain gasket A55 is arranged in the clamping groove A12 and is fixed by two internal six-cylinder head angle screws; a clasping nut A53, a friction washer A51 and a clasping screw A52 are arranged in the tensioning seat A13 in a penetrating manner, the clasping nut A53 is limited by an elastic pin and is mounted with a chain handle A54, the upper end of the clasping screw A52 is connected with the clasping nut A53 through threads, and the clasping nut A53 is connected with a chain handle A54; the lower end of the holding screw A52 is connected with a chain A56, and the other end of the chain A56 can be clamped on a chain gasket A55 and a clamping groove A12; the guide post is arranged in the guide post hole and is fixed by a hexagon socket flat end set screw.

A rotatable level A4 is installed on a base A1, scale marks with an interval of 45 degrees are arranged on the base A1, the rear portion of the level A4 is supported by a wave-shaped gasket, the front portion of the level A4 is limited by a no-ear retainer ring, and the level A4 consists of a level inner shell A41, a level rear cover A42, a level front cover A43 and a level bulb A44.

Threads and steps are arranged on the front guide pillar A2 and the rear guide pillar A3, the handle is positioned through the steps and locked through a thin hexagon nut, and a guide pillar cover is arranged at the top end of the handle to prevent sundries from entering the handle; the top ends of the front guide post A2 and the rear guide post A3 control the relative positions of the guide posts by a handle, so that the vibration of the guide posts and the sliding frame during punching is reduced.

A rotatable level A4 is arranged on a base A1, so that a high-precision machining positioning target is realized; the clasping device A5 with two chains is adopted, the bottom of the base body A11 adopts reinforcing ribs to reduce the stress area, and the stability and the firmness of the machine are greatly improved when the hole is opened, particularly when the second hole is opened.

A connecting rod B2 is arranged in the sliding frame B1, so that the hole saw is positioned in the center of the machine, the connecting rod B2 is arranged on the sliding frame B1 through a bearing, the transverse offset of the hole saw is reduced, the stability of opening is ensured, and the hole saw is prevented from being stressed unevenly, vibrated and damaged due to the offset of a lower layer hole caused by the fact that the hole saw does not pass through the center of a pipeline; a bearing retainer ring is arranged between the two bearings to control the distance between the bearings, and the upper end bearing is limited by a clamp spring; be equipped with the axle sleeve in preceding uide bushing B12 and the back uide bushing B13 on the balladeur train body B11, reduce balladeur train body B11 and preceding guide pillar A2 and back guide pillar A3's clearance, reduce the vibrations that punch, the axle sleeve is spacing through no ear retaining ring, and the gear hole has an angle with two guide pillars, and the casting of spring box is on the balladeur train.

A boss is adopted between the connecting rod B2 and the connecting head B3 to transmit torque, the torque is positioned through a hole and a cylindrical table and fixed through an inner hexagonal cylindrical screw, and the connecting head B3 and a hole saw transmit torque through two cylindrical pins and are fixed by two inner hexagonal cylindrical screws.

The gear shaft assembly is composed of a gear shaft B4, a handle gear B5 and an elastic pin, the gear shaft B4 extends out of two ends for a certain distance after the gear shaft assembly is inserted into a slider gear hole, one side of a spring B7 is assembled, a spring cover B8 is fixed by an inner hexagonal flat end set screw, the two ends of the spring cover B8 are connected with hexagonal joints by the inner hexagonal flat end set screw, the gear shaft B4 fixes the axial position through a shaft sleeve and a bearing, and the position of the bearing is limited by a clamp spring; the handle B9 is connected to a socket head joint B6, the socket head joint B6 is connected with one end of the gear shaft B4 through a set screw to transmit torque, the gear shaft B4 and the handle B9 control the axial position through collision balls, and the torque is transmitted through a socket head joint B6; the inner hexagonal joint B6 is internally provided with a hexagonal groove and a ball-touching groove and is fixed on the gear shaft B4 through a set screw; (the handle B9 is an assembly with a spring, a mandril and a steel ball on the head, the mandril is provided with a groove for containing the collision ball, when the spring is compressed, the mandril stretches out, the collision ball can return to the groove, the handle B9 can be detached from the hexagonal joint, and the mandril is prevented from falling off by a clamp spring in the retraction state).

The spring B7 connected with the gear shaft B4 is arranged on the sliding block and is closed through a spring cover B8, the spring cover B8 is connected with the spring B7 through a hole in the spring B7, the spring cover B8 is connected with the gear shaft B4 through an inner hexagonal flat end set screw to transmit torsion, and a wrench groove is formed in the spring cover B8 to provide pre-tightening force during assembly.

The spring connected with the gear shaft B4 is a clockwork spring B7, so that the travel of a return spring arranged on the front guide pillar A2 or the rear guide pillar A3 is reduced, and the height of the machine is reduced.

The handle B9 and the carriage B1 are angled to increase the operating space.

The spring B7 is matched with the handle gear B5 and the guide post, so that the large-stroke automatic resetting requirement of the hole digger is met.

The connecting rod B2 is connected between connecing B3 and is connected reliably fast and not skid, adopts the boss transmission moment of torsion between the two, through allen key screw fixed position, easy dismounting.

The handle B9 can be quickly exchanged between left and right, and can adapt to different operating environments and operating requirements.

The three-level speed reduction assembly C6 is connected with the connecting rod B2, the three-level speed reduction assembly C6 is connected with the connecting rod B2 through two cylindrical pins to transfer torque, and the connecting rod B2 is provided with a wrench groove to facilitate disassembly and assembly.

The reduction box consists of a motor assembly C7, a transmission box cover C1, a motor cover C3, a transmission box body C2 and a gear set; the gearbox cover C1 and the gearbox body C2 are connected by a positioning sleeve C8 and an inner hexagonal cylindrical head screw; the reduction box is composed of three stages of speed reduction, namely a first-stage speed reduction assembly C4, a second-stage speed reduction assembly C5 and a third-stage speed reduction assembly C6, wherein the second-stage speed reduction assembly C5 is completed by a bevel gear, so that the motor assembly C7 can be transversely placed, and the height of the machine is reduced; the reduction box is fixed on the sliding frame by a lug boss and a screw.

Improved motor output shaft structure, connecting rod B2 is longer when having solved the trompil, and the gear box output shaft vibrates greatly, the not good problem of axiality, and installs and removes easily between gear box output shaft and connecting rod B2, especially through being provided with the bearing in balladeur train B1 middle part, wears to be equipped with connecting rod B2 in the bearing, reduces connecting rod B2 and rocks in the course of working, causes the diplopore disalignment problem of processing.

The motor assembly C7 is laid horizontally, so that the total height of the machine is reduced, and a space is reserved for arranging a handle; the secondary speed reducing assembly C5 of the reduction gearbox uses bevel gear transmission, so that the motor assembly C7 can be laid horizontally.

The tapping method of the tapping machine for the through metal pipe in the embodiment is as follows: the pipe fitting is tightly held by the holding device A5, the handle B9 controls the sliding frame B1 to move downwards along the front guide post A2 and the rear guide post A3, the connecting rod B2 and the connecting head B3 are driven to rotate by the power mechanism C, the punching function is realized by a center drill arranged on the connecting head B3, the sliding frame B1 is automatically reset by the spring B7 after punching is finished, and the sliding frame B1 moves upwards along the front guide post A2 and the rear guide post A3.

During operation, can block the other end of chain A56 on chain gasket A55 and chucking groove A12, twist through chain handle A54 and embrace nut A53, owing to embrace nut A53 and embrace screw A52 and adopt threaded connection, and then the accessible embraces screw A52 pulling chain A56's one end will, so that chain A56 embraces the pipeline tightly, and contact the V style of calligraphy structure of the bottom of pipeline and base body A11, the realization is with embracing tightly of pipeline.

Make gear shaft B4 drive handle gear B5 rotate through rotating handle B9, because handle gear B5 and the rack toothing on the preceding guide pillar A2, and then can make balladeur train B1 move on preceding guide pillar A2 and back guide pillar A3, after punching, the automatic back-set to balladeur train B1 is realized to accessible suit at the outer clockwork spring B7 of spring cover B8, need not the manual work and resets balladeur train B1.

The motor assembly C7 sequentially drives the first-stage speed reduction assembly C4, the second-stage speed reduction assembly C5 and the third-stage speed reduction assembly C6 to achieve the purpose of speed reduction, the connecting rod B2 is connected with the third-stage speed reduction assembly C6, the position of the sliding frame B1 is controlled, and the center drill mounted on the connecting head of the connecting rod B2 is driven to achieve the punching function through the rotation of the driving connecting rod B2.

In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an illustration of the structure of the present invention. Equivalent or simple changes in the structure, characteristics and principles of the invention are included in the protection scope of the patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.