TWI625181B - Tool machine spindle anti-loose device and its combined structure - Google Patents

Abstract

A tool machine spindle anti-loose device and a combined structure thereof, the utility model has an axial sleeve and a lock ring attached to the main shaft of the machine tool, and the anti-loose ring has a screw hole attached to the main shaft of the spindle, and the outer ring of the anti-loose ring The end surface is provided with a plurality of anti-loose structures; the anti-loose structure has a first slot that is radially connected to the inner screw hole, an axial stop surface formed at the bottom of the first slot, and a first slot The elastic piece in the middle of the adjacent threaded hole wall of the elastic piece has an internal thread, a first screw hole which is disposed on the elastic piece and axially communicates with the first slit, and a fixing component which is locked in the first screw hole, One end of the fixing element passes through the first screw hole and axially abuts against the axial blocking surface of the first slot, thereby causing the inner end surface of the anti-loose ring to generate axial pressure on the bearing around the main shaft, and preventing the prevention The loose ring is loose.

Description

Tool machine spindle anti-loose device and its combined structure

The invention relates to a tool machine spindle anti-loose device and a combined structure thereof, in particular to a machine tool which is applied on a main shaft of a machine tool such as a CNC integrated processing machine, and can generate an axial locking pressure on rolling bearings and the like around the main shaft. Spindle lockout device and its combined construction.

Referring to FIG. 1 , it is a spindle front end structure of a CNC integrated processing machine, which has a spindle box 10 for assembling on a spindle head. The spindle box 10 is rotatably provided with a spindle 20; the front end of the spindle 20 For mounting the tool holder and the cutter, the front portion of the main shaft 20 is sleeved with a plurality of rolling bearings 30, and the rolling bearing 30 is disposed in the spindle housing 10, thereby enabling the main shaft 20 to rotate; further, between the plurality of rolling bearings 30 The components of the supporting ring 40 and the like are arranged to maintain the axial position of the plurality of axially adjacent rolling bearings 30; and in order to cause the spindle 20 to axially limit the rolling bearing 30, the front portion of the main shaft 20 is usually provided. The threaded portion 201 is further attached with a lock ring 50 to the threaded portion 201, and the inner ring of the rolling bearing 30 is axially urged by the lock ring 50.

Referring to FIG. 2 and FIG. 3, the anti-loose ring 50 is locked to the thread 201 of the shaft of the main shaft 20. When the main shaft 20 rotates at a high speed, the anti-loose ring 50 may be loosened, so the prior art proposes A plurality of anti-loose structure designs, one of which is shown in FIG. 1 to FIG. 3, wherein the wall of the inner screw hole 501 of the anti-loose ring 50 is selected to have a first ring structure radially recessed in the direction of the outer ring surface. 502. The outer ring surface of the anti-loose ring 50 is further provided with a second ring structure 503 radially recessed toward the inner screw hole 501. The first ring structure 502 is axially adjacent to the second ring structure 503. Thus, a curved elastically deformed curved wall 504 is formed, and an outer hole surface of the anti-loose ring 50 is provided with a light hole 505 extending axially through the elastically deformable curved wall 504, and a pair of screw holes 506 corresponding to the optical hole 505. This passes a screw 60 through the optical hole 505 and is locked to the screw hole 506. The elastic locking wall 504 is slightly deformed by the force of the screw 60, thereby causing the thread of the inner screw hole 501 of the anti-loose ring 50. The threaded portion 201 of the main shaft 20 is bitten, and the lock ring 50 can be prevented from loosening.

However, referring to FIG. 3, when the screw 60 is locked to the screw hole 506, a reaction force is generated opposite to the axial direction of the anti-loose ring 50 against the rolling bearing 30 (as indicated by the arrow in the figure). The reaction force causes the inner end surface 507 of the anti-loose ring 50 to abut against the axial pressure of the rolling bearing 30, so that a large number of components such as the rolling bearing 30 and the support ring 40 may be loosened. The looseness of the components such as the peripheral bearing of the main shaft 20 is one of the causes of the unbalanced rotation of the main shaft 20. If the main shaft 20 cannot be balanced, the main shaft flutter (vibration) will occur, affecting the components such as the main shaft, the bearing and the cutter. The service life and affect the precision and surface roughness of the workpiece. For this reason, how to improve the above disadvantages of the anti-loose ring 50 is a problem that is actively overcome by the present invention.

The object of the present invention is to provide a tool machine spindle anti-loose device and a combined structure thereof, which adopts a anti-loose structure design on a anti-loose ring, so that the anti-loose ring is axially locked on the spindle of the machine tool, and the bearing can be The peripheral components are subjected to axial surface pressure, thereby preventing the loosening of components around the spindle of the machine tool.

In order to achieve the above object, the utility model provides a spindle locking device and a combined structure thereof, and a preferred technical solution thereof comprises: a locking ring, the locking ring center has a shaft for axially inserting the machine tool and locking Attached to the inner screw hole of the spindle of the machine tool, an outer end surface of the anti-loose ring is provided with at least one anti-loose structure; the anti-loose structure has a first slot which is connected to the threaded hole wall of the inner screw hole, An axial stop surface formed on the bottom of the first slot, a spring formed in the first slot, and an end of the spring adjacent to the threaded hole wall has the same internal thread as the threaded hole wall a first screw hole disposed on the elastic piece and axially connected to the first slit, a fixing member locked in the first screw hole, one end of the fixing member passing through the first screw hole axial direction Abutting against the axial stop surface of the first slot causes the elastic piece to elastically deform.

In the above-mentioned machine tool spindle anti-loose device, the anti-loose structure comprises two second slots which are radially connected to the threaded hole wall of the inner screw hole, and the two second slots are from the outer end surface of the anti-loose ring The axial extension extends to the first slit, and the elastic piece is formed between the two second slits.

In the above-mentioned machine tool spindle locking device, the anti-loose ring is a circular ring body or a polygonal ring body.

In the above-mentioned machine tool spindle locking device, the outer end surface of the anti-loose ring is provided with a plurality of the anti-loose structures arranged in a ring shape.

In the above-mentioned machine tool spindle locking device, the fixing component is a socket screw or a stop screw.

In the above-mentioned machine tool spindle anti-loose device, the outer end surface of the anti-loose ring is provided with a plurality of second screw holes arranged in an annular shape and axially recessed, and the second screw hole is selectively locked with a counterweight screw .

In the above-mentioned machine tool spindle anti-loose device, the weight screw is supplied with a screw.

The utility model relates to a combined structure of a tool machine spindle anti-loose device, comprising: a spindle box having a spindle chamber; a spindle for assembling a tool holder and a cutter at an end thereof, the spindle passing through at least one rolling bearing Rotatingly disposed in the main shaft housing, the main shaft is provided with an external thread portion adjacent to the shaft of the rolling bearing; and the anti-loose ring is axially inserted into the main shaft, and the inner screw hole of the anti-loose ring is locked outside the main shaft a threaded portion, an inner end surface of the anti-loose ring axially abuts against an end surface of the rolling bearing, and an internal thread of one end of the elastic piece is screwed to the external thread portion of the main shaft.

The tool machine spindle anti-loose device of the present invention and the combined structure thereof, the first slot of the anti-loose ring, the axial stop surface of the first slot, the spring piece in the first slot, the first screw hole and the fixing The component structure is designed to axially fit the anti-loose ring into the main shaft, so that the inner screw hole of the anti-loose ring is locked to the external thread portion of the main shaft, and the fixing element is locked to the first screw hole of the elastic piece One end of the fixing member is axially abutted against the axial blocking surface of the first slot through the first screw hole, so that the elastic piece is slightly elastically deformed, thereby causing the internal thread of one end of the elastic piece and the spindle The external thread portion is tightly engaged, and the fixing member can generate axial pressure on the inner end surface of the anti-loose ring to prevent the axial pressure of the inner end surface from being weakened by the rolling bearing, thereby preventing the loosening of components around the spindle of the machine tool. The effect.

The structural features and other functions and purposes of the present invention are described in detail below with reference to the accompanying drawings:

Referring to FIG. 4 and FIG. 5, the machine tool spindle anti-loose device of the present invention is used for the axial sleeve and the spindle retracting device of the main shaft 2 of the machine tool. The preferred embodiment includes: The anti-loose ring 1 is a circular ring body or a polygonal ring body. The center of the anti-loose ring 1 is provided with a spindle 2 for axially inserting into the machine tool and is locked in the spindle 2 a screw hole 11 , an outer end surface 12 of the anti-loose ring 1 is provided with at least one anti-loosening structure 13 , preferably a plurality of anti-loose structures 13 arranged annularly on the outer end surface 12 ; the anti-loose structure 13 has a diameter A first blocking groove 131 communicating with the threaded hole wall 111 of the inner screw hole 11 is formed, and an axial blocking surface 132 is formed at the groove bottom of the first cutting groove 131, and is formed in the first slit 131. The elastic piece 133, the one end of the elastic piece 133 adjacent to the screw hole wall 111 has the same internal thread 134 as the threaded hole wall 111, and is disposed on the elastic piece 133 and axially communicates with the first slit 131. a screw hole 135, a fixing component 14 attached to the first screw hole 135, the fixing component 14 preferably being a socket screw or a stop screw. Therefore, one end of the fixing member 14 passes through the first screw hole 135 and axially abuts against the axial blocking surface 132 of the first slit 131, so that the elastic piece 133 is slightly elastically deformed, thereby making the elastic piece 133 end. The internal thread 134 is capable of gripping the threaded portion of the spindle 2.

Referring to FIG. 4 and FIG. 5, the preferred embodiment of the anti-loose ring 1 further includes two second slots 136 that radially communicate with the threaded hole wall 11 of the inner screw hole 11, and the second and second slots The slit 136 extends from the outer end surface 12 of the anti-loose ring 1 to the first slit 131, so that the elastic piece 133 is formed between the two second slits 136. Preferably, the first slit 131 and the second slit 136 are formed by cutting the lock ring 1 by a cutter, and further forming the structure of the elastic piece 133. Moreover, the outer end surface 12 of the anti-loose ring 1 of the present invention may be provided with a plurality of second screw holes 15 arranged in an annular shape and axially recessed, and the second screw holes 15 are selectively locked and matched. The heavy screw 16 is preferably a stop screw, so that the anti-loose device (the anti-loose ring 1) of the present invention has the function of a balance ring and can be used to correct the dynamic balance of the main shaft 2.

The present invention further provides a combined construction of a machine tool spindle lock-up device using the above-described technique of the lock ring 1. The preferred embodiment comprises: a headstock 3 for assembling on a spindle head, the spindle box 3 a cylindrical body having a main shaft chamber 31 communicating with the two ends; a spindle 2 for assembling a tool holder and a cutter at its end, the spindle 2 being rotatably rotated by a plurality of axially adjacent rolling bearings 4 The main shaft 2 is disposed in the front end of the main shaft 2 adjacent to the shaft of the rolling bearing 4 with an external thread portion 21; thereby, the anti-loose ring 1 is axially inserted into the main shaft 2 to make the anti-loose ring The inner screw hole 11 of the lock 1 is locked to the external thread portion 21 of the main shaft 2, and an inner end surface 17 of the lock ring 1 axially abuts against the end surface of the inner ring of the rolling bearing 4 while the elastic piece 133 of the lock ring 1 is secured. The internal thread 134 of one end is also screwed to the external thread portion 21 of the main shaft 2, and the fixing element 14 is locked to the first screw hole 135 of the elastic piece 133, so that one end of the fixing element 14 passes the first The screw hole 135 axially abuts against the axial blocking surface 132 of the first slit 131, thus causing The elastic piece 133 is elastically deformed in a small amount, so that the internal thread 134 at one end of the elastic piece 133 is tightly engaged with the external thread portion 21 of the spindle 2, and the fixing member 14 can generate an axial direction in the direction of the inner end surface 17 of the lock ring 1. The pressure prevents the axial pressure of the inner end surface 17 from being weakened to the rolling bearing 4, thereby preventing the loosening of components around the spindle of the machine tool.

In summary, the utility machine spindle anti-loose device and its combined structure have been practical and creative, and the application of the technical means is novel and undoubted, and the efficacy and design purpose are in line with the fact that it has been reasonably improved. To Ming. To this end, the invention patent application was filed according to law, but the bureau was requested to give a detailed examination, and the patent was granted as a prayer.

1‧‧‧Anti-loose ring

11‧‧‧Inner hole

111‧‧‧Threaded hole wall

12‧‧‧Outer end face

13‧‧‧Anti-loose structure

131‧‧‧first slot

132‧‧‧Axial stop surface

133‧‧‧Shrap

134‧‧‧ internal thread

135‧‧‧first screw hole

136‧‧‧second slot

14‧‧‧Fixed components

15‧‧‧Second screw hole

16‧‧‧Head screw

17‧‧‧ inside end

2‧‧‧ Spindle

21‧‧‧External thread

3‧‧‧ headstock

31‧‧‧ Spindle chamber

4‧‧‧ rolling bearings

Figure 1 is a schematic cross-sectional view of a set structure of a machine tool spindle. Figure 2 is a perspective view of the machine tool spindle and the anti-loose ring. 3 is a schematic cross-sectional view showing a partial enlargement of a lock ring of a machine tool main shaft. Fig. 4 is a perspective view showing the disassembling device and the spindle of the spindle of the machine tool of the present invention. Figure 5 is a perspective view of the spindle locking device of the machine tool of the present invention. Figure 6 is a cross-sectional view showing the assembled structure of the spindle locking device of the machine tool of the present invention. Figure 7 is a partially enlarged cross-sectional view showing the spindle locking device of the machine tool of the present invention.

Claims (8)

A utility machine spindle anti-loose device comprises: a anti-loose ring, the anti-loose ring center has an inner screw hole for axially inserting the machine tool main shaft and locked to the machine tool main shaft, the anti-loose ring An outer end surface is provided with at least one anti-loose structure; the anti-loose structure has a first slot extending radially to the threaded hole wall of the inner screw hole, and an axial stop surface formed on the sidewall of the first slot a second slot that radially communicates with the threaded hole wall of the inner screw hole, and the two second slots extend axially from the outer end surface of the lock ring to the first slot; a spring piece in the first slot, the one end of the spring piece adjacent to the threaded hole wall has the same internal thread as the threaded hole wall; a first portion disposed on the elastic piece and axially communicating to the first slot a screw hole, a fixing member attached to the first screw hole, the one end of the fixing member axially abutting against the axial blocking surface of the first slot through the first screw hole causes the elastic piece to be elastically deformed. The machine tool spindle locking device according to claim 1, wherein the elastic piece is formed between the two second slots. The machine tool spindle locking device according to claim 1 or 2, wherein the anti-loose ring is a circular ring or a polygonal ring. The machine tool spindle locking device according to claim 1 or 2, wherein the outer end surface of the anti-loose ring is provided with a plurality of the anti-loose structures arranged in a ring shape. The machine tool spindle locking device according to claim 1 or 2, wherein the fixing member is a socket screw or a stop screw. The machine tool spindle locking device according to claim 1 or 2, wherein the outer end surface of the anti-loose ring is provided with a plurality of second screw holes arranged in an annular shape and axially recessed, and the second screw holes are selectively A weighted screw is attached to the lock. The machine tool spindle locking device according to claim 6, wherein the weight screw is provided with a screw. A combined structure comprising: a spindle box having a spindle housing; a spindle for assembling a tool holder and a tool at an end thereof, the spindle being rotatably disposed on the spindle capacity by at least one rolling bearing Indoor, the spindle is provided with an external threaded portion adjacent to the shaft of the rolling bearing; and the machine tool spindle locking device according to any one of claims 1 to 7, the anti-loose ring axial sleeve of the machine tool spindle anti-loose device Into the main shaft, the inner screw hole of the anti-loose ring is locked to the external thread portion of the main shaft, and an inner end surface of the anti-loose ring abuts axially against the end surface of the rolling bearing, and the elastic piece end of the machine tool spindle anti-loose device The internal thread is screwed into the external thread portion of the spindle.