Tapping machine

Abstract

The utility model discloses a tapping machine, which relates to tapping equipment and is characterized in that a front rack and a rear rack are arranged on a rack, a sliding seat is arranged on a guide rail between the front rack and the rear rack in a sliding manner, a main shaft tube is connected onto the sliding seat, the main shaft tube and the sliding seat are in axial limiting and circumferential running fit, a nut is fixedly connected onto the sliding seat, and the nut is fixedly connected onto the main shaft tube. An axial feed driving mechanism is arranged on the rear rack, and a power output screw rod on the axial feed driving mechanism and a nut fixedly connected to the sliding seat form screw rod-nut fit; the stability of the cutting feed working process in an automatic cutting feed mode or a manual cutting feed mode can be achieved.

Description

Technical Field

[0001] This utility model relates to hole-opening equipment, specifically a hole-opening machine. Background Technology

[0002] Pipe drilling machines are widely used in pipe drilling operations. For example, a pipe drilling machine disclosed in the document titled "A Pressure Drilling Machine with Switchable Manual and Automatic Feed" (Document No. CN216758256U) includes a guiding mechanism, a feed mechanism, and a transmission mechanism. The feed mechanism has two modes: manual and automatic feed, which can be switched. In the automatic feed mode, by moving a lever, the second gear meshes with the first and second gears respectively. The motor drives the third, second, and first gears to mesh, and the first gear drives the threaded rod to rotate. In the manual feed mode, by moving a lever, the second gear disengages from the first and second gears respectively. At this time, the threaded rod is driven to rotate by manually turning the handwheel.

[0003] In the aforementioned literature, because the lever lacks a corresponding limiting structure, it remains in a free state, making it impossible to guarantee the stability of the lever's posture in both manual and automatic feed modes. In automatic feed mode, the second gear may disengage from the first and third gears due to changes in the lever's position, ultimately preventing automatic feed from being achieved. Utility Model Content

[0004] The purpose of this invention is to provide a hole-opening machine that ensures the stability of both manual and automatic feed processes.

[0005] This utility model can be achieved through the following technical solution: A hole-opening machine, comprising a front frame and a rear frame, with a slide block slidably mounted on a guide rail between the front and rear frames. A spindle tube is connected to the slide block, forming an axial limiting and circumferential rotational fit between the spindle tube and the slide block. A nut is fixedly connected to the slide block. An axial feed drive mechanism is mounted on the rear frame, with a power output screw on the axial feed drive mechanism and a screw-nut fit with the nut fixedly connected to the slide block. The power output screw is concentric with the spindle tube and arranged parallel to the guide rail direction. A rotary drive mechanism is mounted on the slide block, with its torque output end connected to the rear end of the spindle tube and driving the spindle tube to rotate around the core. The tube of the spindle tube is mounted on the front frame. The guide support hole is connected to the front end of the spindle tube and the tool is connected. The axial feed drive mechanism on the rear frame includes a manual feed mechanism and an automatic feed mechanism. A screw torque input gear is provided on the power output screw on the rear end face of the rear frame. The manual torque output gear of the manual feed mechanism and the automatic torque output gear of the automatic feed mechanism mesh with the screw torque input gear. The automatic torque output gear is loosely fitted on the automatic torque shaft. An axial sliding and circumferential limiting sleeve is provided on the automatic torque shaft. A limiting groove is provided on the side of the sleeve facing the automatic torque output gear. The limiting groove and the limiting teeth on the side of the automatic torque output gear form a circumferential limiting and axial sliding fit. A lever for driving the sleeve to move axially along the automatic torque shaft is also provided on the rear frame.

[0006] Compared with the prior art, the present invention has the following beneficial effects:

[0007] By setting an axially sliding and circumferentially limiting sleeve, and cooperating with the lever to drive the sleeve, the synchronous rotation of the automatic torque output gear and the automatic torque shaft can be achieved by utilizing the two states of engagement and disengagement of the limiting groove and the limiting tooth, as well as the idling of the automatic torque output gear, thereby realizing two feeding modes. Furthermore, since the position of the sleeve on the automatic torque shaft is stable when the lever drives the sleeve to the engagement or disengagement state of the limiting groove and the limiting tooth, it is beneficial to achieve the stability of the feeding process in automatic or manual feeding modes. Attached Figure Description

[0008] Figure 1 , 2 This is a schematic diagram of the external structure of this utility model;

[0009] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0010] Figure 4 , 5 These are the transverse and longitudinal sectional views of the gearbox, respectively.

[0011] Figure 6 for Figure 1Enlarged view of a portion of region A in the middle;

[0012] Figure 7 This is a schematic diagram of the external structure of the gearbox;

[0013] Figure 8 This is an assembly diagram of the automatic torque shaft and the sliding sleeve.

[0014] Figure 9 This is a schematic diagram of the automatic torque output gear. Detailed Implementation

[0015] Please see Figure 1-9 As shown, a drilling machine includes a front frame 11 and a rear frame 12 mounted on a frame 10. A slide block 30 is slidably mounted on a guide rail 13 between the front frame 11 and the rear frame 12. A spindle tube 40 is connected to the slide block 30, forming an axial limiting and circumferential rotational fit between the spindle tube 40 and the slide block 30. A nut 31 is fixedly connected to the slide block 30. An axial feed drive mechanism is mounted on the rear frame 12. A power output screw 50 on the axial feed drive mechanism and the nut 31 fixedly connected to the slide block 30 form a screw-nut fit. The power output screw 50 is concentric with the spindle tube 40 and arranged parallel to the guiding direction of the guide rail 13. A rotary drive mechanism 20 is mounted on the slide block 30. The torque output end of the rotary drive mechanism 20 is connected to the rear end of the spindle tube 40 and drives the spindle tube 40 to rotate around the core. The tube of the spindle tube 40 is inserted into a guide support hole on the front frame 11. The front end of the spindle tube 40 is connected to the cutting tool. The axial feed drive mechanism on the rear frame 12 includes a manual feed mechanism 60 and an automatic feed mechanism 70. A screw torque input gear 51 is provided on the power output screw 50 at the rear end face of the rear frame 12. The manual torque output gear 61 of the manual feed mechanism 60 and the automatic torque output gear 71 of the automatic feed mechanism 70 mesh with the screw torque input gear 51. The automatic torque output gear 71 is loosely fitted on the automatic torque shaft 72. The automatic torque shaft 72 is provided with a sliding sleeve 73 that slides axially and limits circumferentially. The sliding sleeve 73 is provided with a limiting groove 731 on the side facing the automatic torque output gear 71. The limiting groove 731 and the limiting tooth 711 on the side of the automatic torque output gear 71 form a circumferential limiting and axial sliding fit. The rear frame 12 is also provided with a lever 81 for driving the sliding sleeve 73 to move axially along the automatic torque shaft 72.

[0016] In the above scheme, the connection between the sliding sleeve 73 and the automatic torque shaft 72 can be selected as a spline connection. By setting the sliding sleeve 73 with axial sliding and circumferential limiting, and cooperating with the lever 81 to drive the sliding sleeve 73, the synchronous rotation of the automatic torque output gear 71 and the automatic torque shaft 72 can be realized by utilizing the two states of engagement and disengagement of the limiting groove 731 and the limiting tooth 711, as well as the free rotation of the automatic torque output gear 71. This ensures that in the automatic feed mode, the automatic torque output gear 71 will not drive the synchronous rotation of the automatic torque shaft 72. Therefore, the load in the manual feed mode is small and the operation is more labor-saving. At the same time, when the lever 81 drives the sliding sleeve 73 to a stable and reliable engagement or disengagement state between the limiting groove 731 and the limiting tooth 711, the position of the sliding sleeve 73 on the automatic torque shaft 72 is stable, which is beneficial to the stability of the feed process in the automatic or manual feed modes.

[0017] In the implementation of the above scheme, the axial feed drive mechanism drives the slide 30 to move along the guide rail 13 towards the front support 11, so that the tool reaches the pipe to be drilled. Then, the rotation drive mechanism 20 drives the spindle tube 40 to rotate, thereby driving the tool to rotate and thus achieving the drilling of the pipe to be drilled. The axial feed drive mechanism includes a manual feed mechanism 60 and an automatic feed mechanism 70, so that the feed mode is divided into manual feed and automatic feed. The manual feed mechanism 60 is operated manually to achieve precise control of the feed amount, and the automatic feed mechanism 70 is driven by a motor. When it is necessary to change the automatic feed mode to the manual feed mode, the lever 81 drives the slide sleeve 73 to move axially along the automatic torque shaft 72, so that the limiting groove 731 and the limiting tooth 711 are completely separated. Since the automatic torque output gear 71 is loosely fitted on the automatic torque shaft 72, the automatic torque output gear 71 cannot drive the automatic torque shaft 72 to rotate. When the worker drives the manual torque shaft 62 to rotate, thereby driving the manual torque output gear 61, the manual torque output gear 61, the lead screw torque input gear 51, and the automatic torque output gear 71 engage. This causes the lead screw torque input gear 51 to drive the lead screw 50 to rotate, causing the slide 30 to feed along the guide rail 13. Meanwhile, the automatic torque output gear 71 will be in an idle state and will not affect the automatic torque shaft 72. Similarly, when changing from manual feed mode to automatic feed mode, the lever 81 is used to push the sliding sleeve 73, so that the limiting groove 731 and the limiting tooth 711 are engaged. This ensures that the sliding sleeve 73, the automatic torque output gear 71, and the automatic torque shaft 72 move synchronously. Thus, when the motor drives the automatic torque shaft 72 to rotate, the automatic feed mode can be achieved. In the automatic feed mode, the manual torque shaft 62 will be rotating, and the sliding sleeve 73 and the automatic torque shaft 72 can be optionally splined.

[0018] A gearbox 14 is provided on the rear frame 12, and the lead screw torque input gear 51, the automatic torque output gear 71 and the manual torque output gear 61 are all located in the gearbox 14. The gearbox 14 is provided to set the working environment of the lead screw torque input gear 51, the automatic torque output gear 71 and the manual torque output gear 61, so as to avoid the gears being corroded by external gases.

[0019] A rotating shaft 82 is rotatably mounted on the gearbox 14 housing. A swing arm 83 is connected to the shaft body outside the gearbox 14, and a positioning pin 84 is connected to the free suspension end of the swing arm 83. A lever 81 is connected to the shaft body inside the gearbox 14 where the rotating shaft 82 is located. The rotating shaft 82 and the positioning pin 84 are parallel, and the rotating shaft 82 is perpendicular to the main shaft tube 40. The lever 81 is parallel to the coplanar plane of the rotating shaft 82 and the positioning pin 84, or the lever 81, the rotating shaft 82, and the positioning pin 84 are coplanar. The other side of the lever 81... The end is inserted into the annular groove 732. A spring 85 is provided between the positioning pin 84 and the rocker arm 83. The spring 85 provides elastic force to drive one end of the positioning pin 84 to abut against the outer wall of the gearbox 14 or the positioning hole 141 provided on the gearbox 14. The positioning holes 141 are arranged at intervals on the rotation path of the positioning pin 84, and the two positioning holes 141 are respectively engaged or disengaged from the limiting groove 731 provided on one side of the sliding sleeve 73 and the limiting tooth 711 of the automatic torque output gear 71.

[0020] In the above description, when switching from automatic feed mode to manual feed mode, first pull the positioning pin 84 upward so that the bottom end of the positioning pin 84 leaves the outer wall of the gearbox 14 or the positioning hole 141 provided on the gearbox 14. At the same time, the spring 85 is in a compressed state. Then, rotate the swing arm 83 so that the rotating shaft 82 drives the lever 81 to rotate together. This causes the lever 81 to drive the sliding sleeve 73 away from the automatic torque output tooth 71. When the limiting groove 731 and the limiting tooth 711 are in the separated position, the bottom end of the positioning pin 84 is just above the other positioning hole 141. After releasing the positioning pin 84, the spring 85 springs out. The force causes the positioning pin 84 to abut against the positioning hole 141. At this time, the position of the lever 81 is fixed, which further limits the position of the sliding sleeve 73 on the automatic torque shaft 72, thereby further improving the stability of the feed process in automatic feed mode. Similarly, after switching from manual feed mode to automatic feed mode, the bottom end of the positioning pin 84 abuts against the positioning hole 141, which also further limits the position of the lever 81 and the position of the sliding sleeve 73 on the automatic torque shaft 72 in this mode, thereby further improving the stability of the feed process in manual feed mode.

[0021] Specifically, the end of the swing arm 83 near the rotating shaft 82 is connected to a cover 831, the top end of the rotating shaft 82 is inserted and fixed inside the cover 831, the free suspension end of the swing arm 83 is connected to a sleeve 832, the middle section of the positioning pin 84 is arranged in the cavity of the sleeve 832, the step 841 of the lower section of the positioning pin 84 slides with the inner wall of the cavity, the spring 85 is sleeved outside the middle section of the positioning pin 84, and the bottom end of the spring 85 abuts against the top of the step 841, and the top end of the spring 85 abuts against the top end of the sleeve 832; the shaft of the rotating shaft 82 located inside the gearbox 14 is connected to the lever 81 through a connecting rod 86; the cover 831 at one end of the swing arm 83 and the sleeve 832 at the other end are an integral structure, and the top end of the rotating shaft 82 is inserted into the cover 831 and fixed with bolts 87.

[0022] One end of the automatic torque shaft 72 is also connected to a worm gear 74, and a worm 75 that meshes with the worm gear 74 is provided in the gearbox 14. One end of the worm 75 is driven by the first motor 76. The worm gear 74 and worm 75 transmission mechanism is equivalent to a speed reduction mechanism, which is used to reduce the speed of the automatic torque shaft 72 and increase the torque.

[0023] The manual torque output gear 61 is fixed on the manual torque shaft 62, and a handwheel 63 is connected to one end of the manual torque shaft 62 located outside the gearbox 11; a handle is provided on the edge of the rim of the handwheel 63 to facilitate the driving of the manual torque shaft 62.

[0024] The top of the gearbox 14 is provided with an observation window 142 for observing the position of the sliding sleeve 73, and a transparent plate 143 is provided on the top of the observation window 142. The observation window 142 and the transparent plate 143 are provided to observe the position of the sliding sleeve 73 inside the gearbox 14 and the meshing status of the limiting groove 731 and the limiting tooth 711, so that the limiting groove 731 and the limiting tooth 711 can be easily aligned when the sliding sleeve 73 is driven to move axially.

[0025] A sleeve 15, which is coaxial with the spindle tube 40, is fixed on the front frame 11. A flange 16 is connected to the opening of the sleeve 15, and the cutting tool is located in the area enclosed by the sleeve 15. The flange 16 is used to connect the pipes to be drilled.

[0026] The spindle tube 40 is connected to a circular cutter head 91 at one end of the front frame 11. The cutter includes a center drill 92 connected to the center of the circular cutter head 91 and a cylindrical cutter barrel 93 connected to the edge of the circular cutter head 91. The rotary drive mechanism 20 includes a second motor 21 for driving the spindle tube 40 to rotate and a reducer 22 connected between the spindle tube 40 and the second motor 21. The second motor 21 transmits torque to the spindle tube 40 through the reducer 22, driving the spindle tube 40 to rotate, so that the spindle tube 40 drives the circular cutter head 91, the center drill 92 and the cutter barrel 93 to rotate, thereby realizing the opening of the pipe.

Claims

1. A hole punching machine, wherein a front frame (11) and a rear frame (12) are provided on a frame (10), a slide (30) is slidably provided on a guide rail (13) between the front frame (11) and the rear frame (12), a spindle tube (40) is connected to the slide (30), the spindle tube (40) and the slide (30) form an axial limiting and circumferential rotational fit, a nut (31) is fixedly connected to the slide (30), an axial feed drive mechanism is provided on the rear frame (12), and a power output screw (50) on the axial feed drive mechanism is connected to the slide (30). The nut (31) fixedly connected to the 30) forms a screw-nut fit. The power output screw (50) is coaxial with the spindle tube (40) and arranged parallel to the guide direction of the guide rail (13). A rotary drive mechanism (20) is provided on the slide (30). The torque output end of the rotary drive mechanism (20) is connected to the rear end of the spindle tube (40) and drives the spindle tube (40) to rotate around the core. The tube of the spindle tube (40) is inserted into the guide support hole on the front frame (11) and the front end of the spindle tube (40) is connected to the cutting tool. The characteristic is that: The axial feed drive mechanism on the rear frame (12) includes a manual feed mechanism (60) and an automatic feed mechanism (70). A screw torque input gear (51) is provided on the power output screw (50) on the rear end face of the rear frame (12). The manual torque output gear (61) of the manual feed mechanism (60) and the automatic torque output gear (71) of the automatic feed mechanism (70) mesh with the screw torque input gear (51) at the same time. The automatic torque output gear (71) is loosely fitted on the screw. On the moving torque shaft (72), an axial sliding and circumferentially limiting sliding sleeve (73) is provided on the automatic torque shaft (72). A limiting groove (731) is provided on the side of the sliding sleeve (73) facing the automatic torque output gear (71). The limiting groove (731) and the limiting tooth (711) on the side of the automatic torque output gear (71) form a circumferential limiting and axial sliding fit. A lever (81) for driving the sliding sleeve (73) to move axially along the automatic torque shaft (72) is also provided on the rear frame (12).

2. The hole-opening machine according to claim 1, characterized in that: A gearbox (14) is provided on the rear frame (12), and the lead screw torque input gear (51), automatic torque output gear (71) and manual torque output gear (61) are all located in the gearbox (14).

3. The hole-opening machine according to claim 2, characterized in that: A rotating shaft (82) is rotatably mounted on the housing of the gearbox (14). A swing arm (83) is connected to the shaft body outside the gearbox (14) where the rotating shaft (82) is located. A positioning pin (84) is connected to the free suspension end of the swing arm (83). A lever (81) is connected to the shaft body inside the gearbox (14) where the rotating shaft (82) is located. The rotating shaft (82) and the positioning pin (84) are parallel, and the rotating shaft (82) is perpendicular to the main shaft tube (40). The lever (81) is parallel to the rotating shaft (82) and the positioning pin (84) in the same plane, or the lever (81), the rotating shaft (82) and the positioning pin (84) are in the same plane. 1) The other end is inserted into the annular groove (732). A spring (85) is provided between the positioning pin (84) and the swing arm (83). The spring (85) provides elastic force to drive one end of the positioning pin (84) to abut against the outer wall of the gearbox (14) or the positioning hole (141) provided on the gearbox (14). The positioning holes (141) are arranged at intervals on the rotation path of the positioning pin (84), and the two positioning holes (141) are respectively engaged or separated from the limiting groove (731) provided on one side of the sliding sleeve (73) and the limiting tooth (711) of the automatic torque output gear (71).

4. The hole-opening machine according to claim 3, characterized in that: The end of the swing arm (83) near the rotating shaft (82) is connected to a cover (831). The top end of the rotating shaft (82) is inserted and fixed inside the cover (831). The free suspension end of the swing arm (83) is connected to a sleeve (832). The middle section of the positioning pin (84) is arranged in the cavity of the sleeve (832). The step (841) of the lower section of the positioning pin (84) slides with the inner wall of the cavity. The spring (85) is sleeved outside the middle section of the positioning pin (84), and the bottom end of the spring (85) abuts against the top of the step (841). The top end of the spring (85) abuts against the top end of the sleeve (832). The shaft (82) located inside the gearbox (14) is connected to the lever (81) through a connecting rod (86).

5. The hole-opening machine according to claim 2 or 3, characterized in that: One end of the automatic torque shaft (72) is also connected to a worm gear (74), and a worm (75) that meshes with the worm gear (74) is provided in the gearbox (14). One end of the worm (75) is driven by the first motor (76).

6. The hole-opening machine according to claim 2 or 3, characterized in that: The manual torque output gear (61) is fixed on the manual torque shaft (62), and a handwheel (63) is connected to one end of the manual torque shaft (62) located outside the gearbox (11).

7. The hole-opening machine according to claim 2 or 3, characterized in that: The top of the gearbox (14) is provided with an observation window (142) for observing the position of the sliding sleeve (73), and a transparent plate (143) is provided on the top of the observation window (142).

8. The hole-opening machine according to claim 1, characterized in that: A sleeve (15) with the same core as the spindle tube (40) is fixed on the front frame (11). A flange (16) is connected to the opening of the sleeve (15). The cutting tool is located in the area enclosed by the sleeve (15).

9. The hole-opening machine according to claim 1, characterized in that: The spindle tube (40) is connected to a circular cutter head (91) at one end of the front frame (11). The cutter includes a center drill (92) connected to the center of the circular cutter head (91) and a cylindrical cutter tube (93) connected to the edge of the circular cutter head (91).

10. The hole-opening machine according to claim 1, characterized in that: The rotary drive mechanism (20) includes a second motor (21) for driving the spindle tube (40) to rotate and a reducer (22) connected between the spindle tube (40) and the second motor (21).

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