CN210059861U

CN210059861U - Reaming device for rocker arm drill

Info

Publication number: CN210059861U
Application number: CN201920908261.1U
Authority: CN
Inventors: 冯祥
Original assignee: Tianjin Jingjun Precision Mould Co Ltd
Current assignee: Tianjin Jingjun Precision Mould Co Ltd
Priority date: 2019-06-17
Filing date: 2019-06-17
Publication date: 2020-02-14
Anticipated expiration: 2029-06-17

Abstract

The utility model discloses a reaming device for radial drill, including the drill bit and with drill bit threaded connection's rotary cutter group, the drill bit includes the swivelling movement section and canned paragraph, and swivelling movement section surface is equipped with first screw thread, and the canned paragraph surface is equipped with the second screw thread, and the direction of rotation of first screw thread and second screw thread is opposite, when the drill bit drills, because of the direction of rotation of first screw thread and second screw thread is opposite, rotary cutter group stops in the upper end of swivelling movement group because of the fender of main shaft, can not influence the drilling work of drill bit. The rotary moving section is provided with a rotary cutter set, the rotary cutter set comprises a rotary ring and a blade arranged on the rotary ring, the rotary ring is in threaded connection with the rotary moving section, the rotary cutter set is rotationally moved to the lower end of the rotary moving section from the upper end of the rotary moving section along a first thread, and the blade is used for reaming a workpiece.

Description

Reaming device for rocker arm drill

Technical Field

The utility model belongs to the technical field of reaming device technique and specifically relates to a reaming device is used to rocking arm brill is related to.

Background

Radial drills may also be referred to as cross arm drills. The radial drilling machine mainly comprises a base, an inner upright post, an outer upright post, a rocker arm, a spindle box, a workbench and the like. The main spindle box is a composite component and consists of a main transmission motor, a main spindle and main spindle transmission mechanism, a feeding and speed changing mechanism, an operating mechanism of a machine tool and the like. The main spindle box is arranged on a horizontal guide rail of the rocker arm and can be operated by a hand wheel to move along the rocker arm on the horizontal guide rail.

When machining, the main spindle box is fastened on the rocker guide rail by a special clamping device, the outer upright post is fastened on the inner upright post, the rocker is fastened on the outer upright post, and then drilling machining is carried out. During drilling, a drill bit arranged on a main shaft performs rotary cutting and longitudinal feeding at the same time, and the motion mode is as follows:

1. the main motion of the radial drilling machine is the rotation motion of the main shaft;

2. the feeding motion is longitudinal feeding of the main shaft;

3. the auxiliary exercise comprises the following steps: the rocker arm vertically moves along the outer upright post, the spindle box moves along the length direction of the rocker arm, and the rocker arm and the outer upright post rotate around the inner upright post together.

The rocker drill can process a small-aperture hole on a workpiece, and a large-aperture drill bit is required for processing a large aperture, so that the cost is increased, the size of the drill bit is limited, and once the aperture to be processed is larger, the drill bit cannot meet the processing requirement.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a reaming device is used to rocking arm brill aims at solving among the background art drill bit and can't increase the processing aperture.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a reaming device for a radial drill comprises a drill bit and a rotary cutter set in threaded connection with the drill bit, wherein the drill bit comprises a rotary moving section and a fixed section, a first thread is arranged on the outer surface of the rotary moving section, a second thread is arranged on the outer surface of the fixed section, the rotating directions of the first thread and the second thread are opposite, the rotary cutter set is arranged on the rotary moving section, the rotary cutter set comprises a rotary ring and a cutter blade arranged on the rotary ring, the rotary ring is in threaded connection with the rotary moving section, the cutter blade comprises a side cutter blade arranged on the side surface of the rotary ring and a bottom cutter blade arranged on the bottom surface of the rotary ring, a first cutting edge is arranged on one side of the side cutter blade far away from the rotary ring, the bottom cutter blade extends in the direction far away from the rotary ring, the width of the bottom cutter blade far away from the rotary ring is smaller, an inclined, the inclined plane is provided with a second cutting edge, the first cutting edge is connected with the second cutting edge, the side blade and the bottom blade are integrally formed, the rotary cutter group rotates and moves to the lower end of the rotating and moving section from the upper end of the rotating and moving section along the first thread, the second cutting edge on the inclined plane of the bottom blade gradually reams the workpiece, and then the first cutting edge on the side blade reams the workpiece.

As a further improvement of the present invention, the first thread is provided with a plurality of threads, and the first thread is provided with a plurality of threads therebetween.

As a further improvement of the present invention, the blade is provided with a plurality of and uniform distribution on the rotating ring.

As a further improvement of the utility model, the angle formed by the bottom blade inclined plane and the axial direction of the drill bit is 30-80 degrees.

As a further improvement, be equipped with dust exhaust device in the drill bit, dust exhaust device includes the dust exhaust room, establishes with fixed axle, the cover of the coaxial setting of drill bit the fixed axle on the fixed axle with fixed axle swivelling joint's swivel sleeve and locate the flabellum on the swivel sleeve, fixed axle and drill bit welding or bolted connection, the dust exhaust is indoor still located to swivel sleeve and flabellum, dust exhaust device is still including locating the dust exhaust hole on the drill bit outer wall, dust exhaust hole and dust exhaust room intercommunication, the relative fixed axle of swivel sleeve is rotatory, and the flabellum carries out the dust exhaust along with the rotatory air current that forms from the dust exhaust room to dust exhaust hole direction flow of swivel sleeve.

As a further improvement, the same horizontal plane on the rotary sleeve is provided with a plurality of fan blades to form a group, and different horizontal heights on the rotary sleeve are provided with a plurality of groups of fan blades.

As a further improvement of the utility model, the dust exhaust hole is provided with a plurality of, the dust exhaust hole is arranged on the same horizontal plane with the flabellum.

Compared with the prior art, the beneficial effects of the utility model are that:

1. when the drill bit drills, the rotating direction of the first thread is opposite to that of the second thread, and the rotating cutter group stays at the upper end of the rotating moving group due to the resistance of the main shaft, so that the drilling work of the drill bit cannot be influenced;

2. when reaming is required, the direction of rotation of the drill bit is changed and the rotating assembly is rotationally moved along the first thread from the upper end of the rotationally movable section to the lower end of the rotationally movable section. The second cutting edge on the bottom blade contacts the surface of the workpiece firstly, the second cutting edge on the inclined surface of the bottom blade gradually enlarges the aperture of the workpiece along with the increase of the processing depth of the drill on the workpiece, and then the first cutting edge on the side blade enlarges the target aperture of the workpiece. The arrangement of the bottom blade realizes the gradual expansion of the aperture, reduces the abrasion of the blade and improves the processing quality of the workpiece;

3. the fixed shaft rotates along with the drill bit, and the rotating sleeve rotates along with the fixed shaft due to friction between the fixed shaft and the rotating sleeve. The rotating speed of the rotating sleeve is lower than that of the fixed shaft, so that the fan blades rotate along with the rotating sleeve to form airflow flowing from the dust exhaust chamber to the dust exhaust hole, and the airflow can not only blow off chips or dust staying on a workpiece, but also exhaust the chips or dust entering the dust exhaust chamber.

Drawings

FIG. 1 is a schematic structural view of a rotary cutter set staying at the upper end of a rotary moving section;

FIG. 2 is an enlarged view of a portion a of FIG. 1;

FIG. 3 is a schematic structural view of the rotary cutter set staying at the lower end of the rotary moving section;

FIG. 4 is a schematic view of a rotary cutter set;

fig. 5 is a schematic structural view of the dust exhaust device.

The reference numerals are explained below: 1. a main shaft; 2. rotating the cutter set; 21. a rotating ring; 22. a blade; 221. a side blade; 222. a bottom blade; 3. a drill bit; 31. a rotational movement section; 311. a first thread; 32. a fixed section; 321. a second thread; 4. a dust exhaust device; 41. a fixed shaft; 42. a rotating sleeve; 43. a fan blade; 44. a dust exhaust hole; 45. a dust exhaust chamber.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals. It should be noted that as used in the following description, the terms "front," "back," "left," "right," "upper," and "lower" refer to directions in the drawings, and the terms "bottom" and "top," "inner," and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Example 1:

as shown in fig. 1, 3 and 4, a hole enlarging device for a rocker arm drill comprises a drill bit 3 and a rotary cutter set 2 in threaded connection with the drill bit 3, the drill bit 3 comprises a rotary moving section 31 and a fixed section 32, a first thread 311 is arranged on the outer surface of the rotary moving section 31, a second thread 321 is arranged on the outer surface of the fixed section 32, the rotating directions of the first thread 311 and the second thread 321 are opposite, the rotary moving section 31 is provided with the rotary cutter set 2, the rotary cutter set 2 comprises a rotary ring 21 and a cutter blade 22 arranged on the rotary ring 21, the rotary ring 21 is in threaded connection with the rotary moving section 31, the cutter blade 22 comprises a side cutter 221 arranged on the side surface of the rotary ring 21 and a bottom cutter 222 arranged on the bottom surface of the rotary ring 21, one side of the side cutter 221 away from the rotary ring 21 is provided with a first cutting edge, the bottom cutter 222 extends in a direction away from the rotary ring 21 and forms, the side surface of the bottom blade 222 close to the drill 3 is parallel to the drill 3, the inclined surface is provided with a second cutting edge, the first cutting edge is connected with the second cutting edge, the side blade 221 and the bottom blade 222 are integrally formed, the rotary cutter group 2 rotates and moves from the upper end of the rotating and moving section 31 to the lower end of the rotating and moving section 31 along the first thread 311, the second cutting edge on the inclined surface of the bottom blade 222 gradually reams the hole of the workpiece, and then the first cutting edge on the side blade 221 reams the hole of the workpiece.

When the drill bit 3 drills, the rotating direction of the first thread 311 is opposite to that of the second thread 321, and the rotating cutter group 2 stays at the upper end of the rotating and moving group due to the resistance of the main shaft 1; when reaming is required, the direction of rotation of the drill bit 3 is changed and the rotation assembly is rotationally moved along the first thread 311 from the upper end of the rotationally moving section 31 to the lower end of the rotationally moving section 31. The second cutting edge on the bottom blade 222 first contacts the surface of the workpiece, and as the depth of the workpiece to be machined by the drill 3 increases, the second cutting edge on the inclined surface of the bottom blade 222 gradually enlarges the aperture of the workpiece, and then the first cutting edge on the side blade 221 enlarges the target aperture of the workpiece. The arrangement of the bottom blade 222 realizes the gradual expansion of the aperture, reduces the abrasion of the blade 22 and improves the processing quality of the workpiece.

Example 2:

As shown in fig. 2, the first screw 311 is provided with a plurality of first screws 311, and the first screws 311 are arranged in parallel. The arrangement of the plurality of parallel first screw threads 311 increases the stability of the connection of the rotary cutter unit 2 to the rotationally moving section 31.

As shown in fig. 1 and 3, the plurality of blades 22 are provided and are uniformly distributed on the rotating ring 21. The above-described arrangement of the blades 22 improves the quality of the work piece process and reduces wear on the individual blades 22.

As shown in fig. 1, 3 and 4, the inclined surface of the bottom blade 222 forms an angle of 30 ° to 80 ° with the axial direction of the drill 3. The angle can avoid the problem that the bottom blade 222 is too long and is easy to break, and can also avoid the problem that the hole diameter of the workpiece is too fast to expand and the blade 22 is seriously abraded.

As shown in fig. 5, a dust exhaust device 4 is disposed in the drill bit 3, the dust exhaust device 4 includes a dust exhaust chamber 45, a fixed shaft 41 disposed coaxially with the drill bit 3, a rotating sleeve 42 sleeved on the fixed shaft 41 and rotatably connected to the fixed shaft 41, and fan blades 43 disposed on the rotating sleeve 42, the fixed shaft 41 is welded or bolted to the drill bit 3, the rotating sleeve 42 and the fan blades 43 are disposed in the dust exhaust chamber 45, the dust exhaust device 4 further includes a dust exhaust hole 44 disposed on an outer wall of the drill bit 3, the dust exhaust hole 44 is communicated with the dust exhaust chamber 45, the rotating sleeve 42 rotates relative to the fixed shaft 41, and the fan blades 43 rotate with the rotating sleeve 42 to form an air flow flowing from the dust exhaust chamber 45 to the dust exhaust hole 44 for dust exhaust. Since the fixed shaft 41 rotates along with the drill 3, the rotary sleeve 42 rotates along with the fixed shaft 41 due to a frictional force between the fixed shaft 41 and the rotary sleeve 42. The rotating sleeve 42 rotates at a lower speed than the fixed shaft 41, so that the fan blades 43 rotate with the rotating sleeve 42 to form an air flow flowing from the dust exhaust chamber 45 to the dust exhaust hole 44, and the air flow can blow off the chips or dust staying on the workpiece and exhaust the chips or dust entering the dust exhaust chamber 45.

As shown in fig. 5, a plurality of blades 43 are disposed on the same horizontal plane of the rotating sleeve 42 to form a group, and a plurality of groups of blades 43 are disposed on the rotating sleeve 42 at different horizontal heights. The arrangement of the fan blades 43 can improve the dust exhaust efficiency.

As shown in fig. 5, a plurality of dust exhaust holes 44 are provided, and the dust exhaust holes 44 are provided on the same horizontal plane as the fan blades 43. The arrangement of the dust exhaust holes 44 can improve the dust exhaust efficiency.

The working principle is as follows: as shown in fig. 1 to 4, when the drill 3 drills, the first screw 311 and the second screw 321 rotate in opposite directions, and the rotary cutter set 2 stays at the upper end of the rotary moving set due to the resistance of the main shaft 1; when reaming is required, the direction of rotation of the drill bit 3 is changed and the rotation assembly is rotationally moved along the first thread 311 from the upper end of the rotationally moving section 31 to the lower end of the rotationally moving section 31. The second cutting edge on the bottom blade 222 first contacts the surface of the workpiece, and as the depth of the workpiece to be machined by the drill 3 increases, the second cutting edge on the inclined surface of the bottom blade 222 gradually enlarges the aperture of the workpiece, and then the first cutting edge on the side blade 221 enlarges the target aperture of the workpiece. The arrangement of the bottom blade 222 realizes the gradual expansion of the aperture, reduces the abrasion of the blade 22 and improves the processing quality of the workpiece.

As shown in fig. 5, the fixed shaft 41 rotates with the drill 3, and the rotary sleeve 42 rotates with the fixed shaft 41 due to a frictional force between the fixed shaft 41 and the rotary sleeve 42. The rotating sleeve 42 rotates at a lower speed than the fixed shaft 41, so that the fan blades 43 rotate with the rotating sleeve 42 to form an air flow flowing from the dust exhaust chamber 45 to the dust exhaust hole 44, and the air flow can blow off the chips or dust staying on the workpiece and exhaust the chips or dust entering the dust exhaust chamber 45.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A reaming device for a rocker arm drill comprises a drill bit (3) and a rotary cutter set (2) in threaded connection with the drill bit (3), and is characterized in that the drill bit (3) comprises a rotary moving section (31) and a fixed section (32), a first thread (311) is arranged on the outer surface of the rotary moving section (31), a second thread (321) is arranged on the outer surface of the fixed section (32), the rotating directions of the first thread (311) and the second thread (321) are opposite, the rotary cutter set (2) is arranged on the rotary moving section (31), the rotary cutter set (2) comprises a rotary ring (21) and a cutter blade (22) arranged on the rotary ring (21), the rotary ring (21) is in threaded connection with the rotary moving section (31), the cutter blade (22) comprises a side cutter blade (221) arranged on the side face of the rotary ring (21) and a bottom cutter blade (222) arranged on the bottom face of the rotary ring (21), the side of the side blade (221) far away from the rotating ring (21) is provided with a first cutting edge, the bottom blade (222) extends in the direction far away from the rotating ring (21) and forms an inclined surface with the width smaller as the side is far away from the rotating ring (21), the side surface of the bottom blade (222) close to the drill (3) is parallel to the drill (3), the inclined surface is provided with a second cutting edge, the first cutting edge is connected with the second cutting edge, the side blade (221) and the bottom blade (222) are integrally formed, the rotary cutter set (2) rotates and moves from the upper end of the rotating and moving section (31) to the lower end of the rotating and moving section (31) along a first thread (311), the second cutting edge on the inclined surface of the bottom blade (222) gradually reams the hole of the workpiece, and then the first cutting edge on the side blade (221) reams.

2. The reaming device for the rocker arm drill according to claim 1, wherein the first threads (311) are provided in a plurality, and the first threads (311) are arranged in parallel.

3. A reaming device for the rocker arm drill according to claim 1, characterized in that said blades (22) are provided in plurality and are uniformly distributed on the rotating ring (21).

4. A reaming device for a rocker arm drill according to claim 1, characterized in that the angle formed by the inclined surface of the bottom blade (222) and the axial direction of the drill bit (3) is 30-80 °.

5. The reaming device for the rocker drill according to claim 1, wherein a dust exhaust device (4) is arranged in the drill bit (3), the dust exhaust device (4) comprises a dust exhaust chamber (45), a fixed shaft (41) coaxially arranged with the drill bit (3), a rotating sleeve (42) sleeved on the fixed shaft (41) and rotatably connected with the fixed shaft (41), and fan blades (43) arranged on the rotating sleeve (42), the fixed shaft (41) is welded or bolted with the drill bit (3), the rotating sleeve (42) and the fan blades (43) are arranged in the dust exhaust chamber (45), the dust exhaust device (4) further comprises dust exhaust holes (44) arranged on the outer wall of the drill bit (3), the dust exhaust holes (44) are communicated with the dust exhaust chamber (45), the rotating sleeve (42) rotates relative to the fixed shaft (41), and the fan blades (43) form airflow flowing from the dust exhaust chamber (45) to the dust exhaust holes (44) along with the rotation of the rotating sleeve (42) to exhaust dust .

6. The reaming device for the rocker arm drill according to claim 5, wherein a plurality of blades (43) are arranged on the same horizontal plane on the rotating sleeve (42) to form a group, and a plurality of groups of blades (43) are arranged on the rotating sleeve (42) at different horizontal heights.

7. The reaming device for the rocker arm drill according to claim 5 or 6, wherein a plurality of dust exhaust holes (44) are provided, and the dust exhaust holes (44) and the fan blades (43) are arranged on the same horizontal plane.