CN218694171U

CN218694171U - Axial transmission mechanism of deep hole boring machine

Info

Publication number: CN218694171U
Application number: CN202222925115.4U
Authority: CN
Inventors: 陈建立; 王志刚; 崔攀峰; 任玲玲
Original assignee: Luoyang Guangwei Precision Technology Co ltd
Current assignee: Luoyang Guangwei Precision Technology Co ltd
Priority date: 2022-11-02
Filing date: 2022-11-02
Publication date: 2023-03-24
Anticipated expiration: 2032-11-02

Abstract

An axial transmission mechanism of a deep hole boring machine comprises a boring bar assembly arranged on a base, wherein the boring bar assembly comprises a boring bar, bearing blocks positioned at two ends of the boring bar, a boring tool holder sliding along the axial direction of the boring bar, and a lead screw connected with the boring tool holder in a threaded manner; one end of the boring rod is connected with a motor, and the motor is used for driving the boring rod to rotate; the axial transmission mechanism is arranged at the other end of the boring rod and comprises a central shaft which is coaxial with the boring rod, and a central gear is connected to the central shaft; the screw rod is fixedly connected with a planetary gear, and the central gear is in meshed connection with the planetary gear through a reduction gear set; an anti-rotation arm is fixed on the base and connected with the central shaft for limiting the rotation freedom degree of the central shaft. The axial transmission mechanism does not need to be provided with a feeding motor, and can realize the rotation of the boring bar and the feeding of the boring cutter only by one motor. The axial transmission mechanism has the characteristics of simplicity, compactness and small volume, and is favorable for dismounting the boring bar assembly.

Description

Axial transmission mechanism of deep hole boring machine

Technical Field

The utility model belongs to the technical field of machining equipment and specifically relates to an axial drive mechanism of deep hole boring machine is related to.

Background

The machining of the inner bore of the roller sleeve usually requires the use of a boring machine. In a traditional boring machine, a spindle box and a chuck drive a roller sleeve to rotate, and a boring cutter bar moves axially to cut an inner hole of the roller sleeve. However, for a large roller sleeve with the length of more than 2 meters, the self weight is large, the rotational inertia is large, the load of a spindle box and a transmission mechanism is greatly increased, and the electric energy consumption is huge. In addition, the boring cutter bar of the existing boring machine is of a cantilever structure, so that the rigidity is poor, the sagging amount is large, and the machining precision of deep holes is difficult to ensure.

The patent with the application number of 201810718282.7 discloses a deep hole boring machine for machining a roll sleeve of a casting and rolling machine, wherein a boring bar motor drives a main boring bar and an auxiliary boring bar to rotate, and a lead screw motor drives a boring tool holder to move axially along the main boring bar and the auxiliary boring bar, so that the boring tool cuts the fixed roll sleeve. Because the roller sleeve does not need to rotate, the burden of the main spindle box and the transmission mechanism is reduced. Due to the existence of the main boring bar and the auxiliary boring bar and the change of the supporting condition, the rigidity of the boring cutter holder is increased.

However, the deep hole boring machine has the defects that the roller sleeve can be clamped only by integrally disassembling the boring bar assembly before machining, but the deep hole boring machine is too complex in transmission mechanism, the boring bar assembly is difficult to disassemble and assemble, and the time for disassembling and assembling the boring bar assembly is long, so that the use efficiency of equipment is seriously influenced. There is therefore a need for an improved drive mechanism for facilitating the disassembly and assembly of a boring bar assembly.

SUMMERY OF THE UTILITY MODEL

In order to overcome not enough in the background art, the utility model discloses an axial drive mechanism of deep hole boring machine adopts following technical scheme:

an axial transmission mechanism of a deep hole boring machine comprises a boring rod assembly arranged on a base, wherein the boring rod assembly comprises a boring rod, bearing blocks positioned at two ends of the boring rod, a boring cutter frame sliding along the axial direction of the boring rod, and a lead screw connected with the boring cutter frame in a threaded manner; one end of the boring rod is connected with a motor, and the motor is used for driving the boring rod to rotate; the axial transmission mechanism is arranged at the other end of the boring rod and comprises a central shaft which is coaxial with the boring rod, and a central gear is connected to the central shaft; the screw rod is fixedly connected with a planetary gear, and the central gear is in meshed connection with the planetary gear through a reduction gear set; an anti-rotation arm is fixed on the base and connected with the central shaft for limiting the rotation freedom degree of the central shaft.

According to the further improved technical scheme, a connecting disc is fixed to the other end of the boring rod through a plurality of connecting rods, a bearing is arranged on the connecting disc, and the central shaft is installed in the bearing.

The technical scheme is further improved, at least two central gears are connected to the central shaft, and the central gears can slide along the axial direction of the central shaft; the reduction gear set is a variable speed reduction gear set, and one sun gear is in meshed connection with the planet gear through the variable speed reduction gear set.

The technical scheme is further improved, a plurality of ring grooves are formed in the central shaft, a positioning sliding sleeve capable of sliding along the central shaft is arranged on the central shaft, the positioning sliding sleeve is provided with a collision bead structure matched with the ring grooves, and one end of the positioning sliding sleeve is connected with the central gear.

The technical scheme is further improved, a square column is arranged at one end, far away from the central gear, of the central shaft, and a square hole corresponding to the square column is formed in the anti-rotating arm.

The technical scheme is further improved, a fixing column with a square column is fixed on the base, and a square hole corresponding to the square column is formed in the other end of the anti-rotation arm.

Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has:

the boring machine special for deep hole machining does not need to be provided with a feeding motor, and can realize the rotation of the boring rod and the feeding of the boring cutter only by one motor.

Compared with the prior art, the axial transmission mechanism is an independent module, has the characteristics of simplicity, compactness and small volume, greatly reduces the workload of dismounting and mounting the boring bar assembly when clamping the roller sleeve, greatly reduces the dismounting difficulty, and improves the service efficiency of equipment.

Drawings

Fig. 1 shows a schematic structural diagram of the special boring machine for deep hole machining.

Fig. 2 shows a schematic structural diagram of the axial transmission mechanism.

Fig. 3 shows a schematic view of the axial transmission mechanism with the connecting disc removed.

Fig. 4 shows a schematic structural diagram of the axial transmission mechanism in a manual feed state.

Fig. 5 is a schematic structural diagram of the axial transmission mechanism in an automatic feed state.

In the figure:

100. a base;

200. a boring bar assembly;

201. boring a rod; 202. a bearing seat; 203. a boring tool holder; 204. a lead screw; 205. a central shaft; 206. a sun gear; 207. a planetary gear; 208. a stage I reduction gear; 209. a second-stage reduction gear; 210. positioning the sliding sleeve; 211. an antirotation arm; 212. fixing a column; 213. a connecting disc; 214. a connecting rod;

300. a motor;

400. a speed reducer;

500. a coupling;

600. v-shaped fixing frame.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. It should be noted that in the description of the present invention, the terms "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate directions or positional relationships based on those shown in the drawings, which are merely for convenience of description, but do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. It should also be noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and include, for example, fixed or removable connections or integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1, a boring machine for deep hole processing includes a boring bar assembly 200 mounted on a base 100. The boring bar assembly 200 comprises a horizontally arranged boring bar 201, a bearing seat 202, a boring bar holder 203 and a lead screw 204. Specifically, the boring bar 201 is a long hollow cylinder, a pair of bearing blocks 202 are disposed at two ends of the boring bar 201, and the bearing blocks 202 are connected to the base 100 by bolts. A boring holder 203 is attached to the boring bar 201, and a boring cutter is attached to the boring holder 203. The boring holder 203 has a sliding bush structure, and the boring holder 203 can slide in the axial direction of the boring bar 201. An axial groove is formed in the boring bar 201, a lead screw 204 is installed in the axial groove, a lead screw nut is installed on the boring tool holder 203, and when the lead screw 204 rotates, the boring tool holder 203 can be pushed to slide along the axial direction of the boring bar 201, so that axial feed of the boring tool holder 203 is achieved. The base 100 is further provided with a motor 300, a speed reducer 400 and a pair of V-shaped fixing frames 600, wherein the speed reducer 400 is connected with one end of the boring bar 201 through a coupling 500, and the motor 300 drives the boring bar 201 to rotate after being decelerated by the speed reducer 400.

Referring to fig. 2 and 3, in order to simplify the transmission mechanism of the prior axial feed, a connecting disc 213 is fixed on one end of the boring bar 201 far away from the motor 300 through six connecting rods 214, one end of each connecting rod 214 is provided with threads, and the connecting disc 213 is screwed on the connecting rod 214 through nuts. The connecting disc 213 is circular and is smaller than the inner diameter of the bearing housing 202. A bearing is attached to the center of the connecting plate 213, a center shaft 205 is attached to the bearing, the center shaft 205 is provided coaxially with the boring bar 201, and a center gear 206 is connected to the center shaft 205. In the present embodiment, the sun gear 206 is a duplicate gear having one gear with a smaller number of teeth and one gear with a larger number of teeth. The central shaft 205 is provided with a spline, and the duplicate gear is slidable along the central shaft 205 but is not rotatable.

Referring to fig. 3, three ring grooves are formed on a central shaft 205, a positioning sliding sleeve 210 capable of sliding along the central shaft 205 is arranged on the central shaft 205, and the left end of the positioning sliding sleeve 210 is connected with a central gear 206. The positioning sliding sleeve 210 has a collision bead structure matching with the ring groove. Specifically, a pressure spring and a steel ball are arranged in the positioning sliding sleeve 210, and under the action of the pressure spring, the steel ball can enter one of the annular grooves, so that a certain central gear 206 in the dual gear is meshed with other gears.

Referring to fig. 2, a fixing post 212 having a square column is fixed to the base 100, and a square hole corresponding to the square column is formed at a lower end of the rotation preventing arm 211. A square column is arranged at the right end of the central shaft 205, and a square hole corresponding to the square column is arranged at the upper end of the rotation preventing arm 211. Due to the limitation of the rotation preventing arm 211, when the boring bar 201 rotates, the rotation preventing arm 211 can limit the rotation degree of freedom of the central shaft 205, and prevent the central shaft 205 and the central gear 206 from rotating.

Referring to fig. 3, two planetary gears 207 are coaxially attached to the screw 204, wherein the planetary gear 207 at the right end is used for manually moving the boring holder 203, and the planetary gear 207 at the left end is used for automatic feed. When the boring cutter holder 203 is moved manually (at the moment, the boring rod 201 does not rotate), the positioning sliding sleeve 210 is moved, one central gear 206 in the duplicate gears is meshed with the planetary gear 207 at the right end, and the positioning sliding sleeve 210 is used for preventing the central gear 206 from moving and ensuring the normal meshing. Then, the rotation preventing arm 211 is removed and a rocker arm is mounted on the square column of the center shaft 205, and then the screw 204 is rotated by rotating the rocker arm, thereby moving the boring bar 203 along the boring bar 201. Since the number of teeth of the planetary gear 207 at the right end is close to that of the sun gear 206, the boring holder 203 can be moved quickly by rotating the rocker arm.

Referring to fig. 4, two gear shafts are further provided between the fixing frame and the boring bar 201, one of which is connected with a set of i-stage reduction gears 208, and the other of which is connected with a set of ii-stage reduction gears 209. Wherein one of the stage i reduction gears 208 is engaged with one of the stage ii reduction gears 209, and the other of the stage ii reduction gears 209 is engaged with the planetary gear 207. When the boring holder 203 is manually moved, one sun gear 206 is engaged with the planetary gear 207, but neither sun gear 206 is engaged with the stage i reduction gear 208.

Referring to fig. 5, before the automatic feed, the positioning shift sleeve 210 is first moved so that one of the sun gears 206 meshes with the stage i reduction gear set 208, the stage i reduction gear set 208 meshes with the stage ii reduction gear set 209, and the stage ii reduction gear set 209 meshes with the planetary gears 207 having a larger number of teeth. During automatic feed, the boring bar 201 is driven by the motor 300 to rotate, the lead screw 204 and the gear shaft on the boring bar 201 rotate along with the boring bar 201, and at the same time, the planetary gear 207 on the lead screw 204 and the I-stage and II-stage reduction gear sets 208 and 209 on the gear shaft perform revolution motion relative to the central gear 206. Since the sun gear 206 cannot rotate due to the restriction of the rotation preventing arm 211, the i-stage reduction gear 208 engaged with the sun gear 206 performs revolution motion and also performs rotation motion. In this case, the sun gear is fixed as a sun gear in the planetary reduction gear set, and the gears of the stage i reduction gear set 208 are planetary gears of the planetary carrier, and when the planetary carrier rotates, the planetary gears revolve around the sun gear while rotating on their own axis. Thus, the rotating stage i reduction gear set 208 can drive the screw 204 to rotate through the stage ii reduction gear set 209, thereby enabling the boring cutter holder 203 to automatically feed.

It is noted that the rotation speed of the screw 204 is much less than the rotation speed of the boring bar 201. Wherein, the immobile central gear 206 is meshed with the revolving I-stage reduction gear set 208, so that the screw 204 is subjected to first-stage reduction; the I-stage reduction gear set 208 is meshed with the II-stage reduction gear set 209, so that the screw 204 is subjected to two-stage reduction; the second reduction gear set 209 is engaged with the planetary gear 207 having a larger number of teeth, so that the screw 204 is decelerated in three stages. After three times of speed reduction, the rotating speed of the screw 204 is far less than that of the boring bar 201, so that the feeding speed of the boring cutter is far less than that of the boring cutter 201, which well meets the cutting requirement of the boring cutter on the roller sleeve.

In the present embodiment, the stage I reduction gear set 208 has three gears with different tooth numbers. By moving the positioning sliding sleeve 210, two gears of the positioning sliding sleeve can be respectively meshed with two central gears 206 on the central shaft 205, so that the boring cutter can obtain two different feeding speeds.

Referring to fig. 1, since the axial transmission mechanism is installed at one end of the boring bar 201 far away from the motor 300, and the overall structure is relatively compact, before the roller sleeve is machined, the roller sleeve can be clamped only by pulling the bearing seat 202 at the end out of the boring bar 201, then sleeving the roller sleeve on the boring bar 201, and fixing the roller sleeve through the pair of V-shaped fixing frames 600.

Therefore, the boring machine special for deep hole processing does not need to be provided with the feeding motor 300, and only one motor 300 is needed to realize the rotation of the boring bar 201 and the feeding of the boring cutter. Compared with the prior art, the boring machine special for deep hole machining is simple and compact, and the transmission mechanism is ingenious, so that when the roller sleeve is clamped, the workload of disassembling and assembling the boring bar assembly 200 is greatly reduced, the disassembling and assembling difficulty is greatly reduced, and the service efficiency of equipment is improved.

The details of which are not described in the prior art. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The axial transmission mechanism of the deep hole boring machine comprises a boring bar assembly arranged on a base, wherein the boring bar assembly comprises a boring bar, bearing blocks positioned at two ends of the boring bar, a boring tool holder sliding along the axial direction of the boring bar, and a lead screw connected with the boring tool holder in a threaded manner, one end of the boring bar is connected with a motor, and the motor is used for driving the boring bar to rotate, and the axial transmission mechanism is characterized in that: the axial transmission mechanism is arranged at the other end of the boring rod and comprises a central shaft which is coaxial with the boring rod, and a central gear is connected to the central shaft; the screw rod is fixedly connected with a planetary gear, and the central gear is in meshed connection with the planetary gear through a reduction gear set; an anti-rotation arm is fixed on the base and connected with the central shaft for limiting the rotation freedom degree of the central shaft.

2. The axial transmission mechanism of the deep hole boring machine as claimed in claim 1, wherein: and a connecting disc is fixed at the other end of the boring bar through a plurality of connecting rods, a bearing is arranged on the connecting disc, and the central shaft is arranged in the bearing.

3. The axial transmission mechanism of the deep hole boring machine as claimed in claim 1, wherein: at least two central gears are connected to the central shaft, and the central gears can slide along the axial direction of the central shaft; the reduction gear set is a variable speed reduction gear set, and one sun gear is in meshed connection with the planet gear through the variable speed reduction gear set.

4. The axial transmission mechanism of the deep hole boring machine as claimed in claim 3, wherein: the central shaft is provided with a plurality of ring grooves, the central shaft is provided with a positioning sliding sleeve capable of sliding along the central shaft, the positioning sliding sleeve is provided with a collision bead structure matched with the ring grooves, and one end of the positioning sliding sleeve is connected with the central gear.

5. The axial transmission mechanism of the deep hole boring machine as claimed in claim 1, wherein: a square column is arranged at one end of the central shaft, which is far away from the central gear, and a square hole corresponding to the square column is arranged on the anti-rotating arm.

6. The axial transmission mechanism of a deep-hole boring machine according to claim 5, characterized in that: a fixing column with a square column is fixed on the base, and a square hole corresponding to the square column is formed in the other end of the rotation preventing arm.