阅读说明：本技术 一种加工中心丝杠安装结构 (Machining center lead screw mounting structure ) 是由 胡胜庚 胡胜贤 于 2019-09-19 设计创作，主要内容包括：本发明公开了一种加工中心丝杠安装结构,包括用于安装丝杠两端的第一螺母座和第二螺母座,所述第一螺母座和第二螺母座上均设有安装孔,所述丝杠两端分别通过至少两个滚珠轴承安装在安装孔内,所述滚轴轴承轴向外侧的丝杠两端均装有一组蝶形弹簧,所述蝶形弹簧轴向外侧的丝杠上装有锁紧螺母。通过在滚珠轴承与锁紧螺母之间设置蝶形弹簧,就提供了一定的伸缩余量,从而在丝杠发热伸长时,可以通过蝶形弹簧的弹性补偿因伸长而产生的间隙,将丝杠的轴端稳定的定位在第一螺母座和第二螺母座上,避免轴端伸出导致定位不稳定,防止出现中心偏移现象,有效的保障了丝杠的稳定性和作业精度。(The invention discloses a screw rod mounting structure of a machining center, which comprises a first nut seat and a second nut seat, wherein the first nut seat and the second nut seat are used for mounting two ends of a screw rod, mounting holes are formed in the first nut seat and the second nut seat, two ends of the screw rod are respectively mounted in the mounting holes through at least two ball bearings, a group of belleville springs are mounted at two ends of the screw rod, which are axially outside a roller bearing, and locking nuts are mounted on the screw rod, which is axially outside the belleville springs. Through set up disc spring between ball bearing and lock nut, just provided certain flexible surplus to when the lead screw generates heat and extends, can be through the elastic compensation of disc spring because of the clearance that the extension produced, with the stable location of the axle head of lead screw on first nut seat and second nut seat, avoid the axle head to stretch out and lead to the location unstable, prevent the central skew phenomenon, the effectual stability and the operation precision that ensure the lead screw.)

1. The utility model provides a machining center lead screw mounting structure, includes first nut seat (2) and second nut seat (3) that are used for installing lead screw (1) both ends, its characterized in that: all be equipped with mounting hole (21) on first nut seat (2) and second nut seat (3), install in mounting hole (21) through two at least ball bearing (4) respectively in lead screw (1) both ends, a set of belleville spring (5) are all equipped with at lead screw (1) both ends in roller bearing (4) axial outside, lock nut (6) are equipped with on lead screw (1) in belleville spring (5) axial outside.

2. The machining center screw mounting structure according to claim 1, wherein: each group of the butterfly springs (5) comprises two butterfly-shaped elastic sheets (51) which are buckled and installed.

3. The machining center screw mounting structure according to claim 1, wherein: a movable ring (7) is further arranged between the butterfly spring (5) and the ball bearing (4), and the movable ring (7) is in contact with the inner ring of the ball bearing (4).

4. The machining center screw mounting structure according to claim 1, wherein: the outer end of first nut seat (2) and second nut seat (3) installs bearing holding ring (8) through the bolt, bearing holding ring (8) with the outer lane contact of ball bearing (4), bearing holding ring (8) middle part still is equipped with and is used for dodging dodge hole (81) are dodged of belleville spring (5).

Technical Field

The invention relates to the field of machine tools, in particular to a screw rod mounting structure of a machining center.

Background

The lead screw is an important part of a machining center and is generally installed on a nut seat through a bearing and a locking nut, but the lead screw generates heat and extends during working, so that the gap between the bearing and the nut seat is easily increased, the shaft end of the lead screw is unstably positioned, the center offset phenomenon occurs, and the stability and the operation precision of the lead screw are seriously influenced. Therefore, there is a need for improvements and optimizations to the prior art.

Disclosure of Invention

The invention aims to solve the technical problem of how to prevent the phenomenon of center deviation of a lead screw during operation.

In order to solve the technical problem, the scheme of the invention is as follows:

the utility model provides a machining center lead screw mounting structure, is including first nut seat and the second nut seat that is used for installing the lead screw both ends, all be equipped with the mounting hole on first nut seat and the second nut seat, the lead screw both ends are installed in the mounting hole through two at least ball bearing respectively, a set of belleville spring is all equipped with at the axial outside lead screw both ends of roller bearing, lock nut is equipped with on the axial outside lead screw of belleville spring.

Furthermore, each group of the butterfly springs comprises two butterfly-shaped elastic sheets which are buckled and installed.

Furthermore, a movable ring is arranged between the butterfly spring and the ball bearing, and the movable ring is in contact with an inner ring of the ball bearing.

Further, the outer ends of the first nut seat and the second nut seat are provided with bearing positioning rings through bolts, the bearing positioning rings are in contact with the outer rings of the ball bearings, and the middle parts of the bearing positioning rings are further provided with avoiding holes for avoiding the belleville springs.

Compared with the prior art, the invention has the beneficial effects that: through set up disc spring between ball bearing and lock nut, just provided certain flexible surplus to when the lead screw generates heat and extends, can be through the elastic compensation of disc spring because of the clearance that the extension produced, with the stable location of the axle head of lead screw on first nut seat and second nut seat, avoid the axle head to stretch out and lead to the location unstable, prevent the central skew phenomenon, the effectual stability and the operation precision that ensure the lead screw.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

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

FIG. 3 is a cross-sectional view of a first nut seat according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a bearing positioning ring according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a Belleville spring according to an embodiment of the present disclosure;

fig. 6 is an enlarged view of a portion B in fig. 1.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1-6, a machining center lead screw mounting structure, includes first nut seat 2 and second nut seat 3 that are used for installing lead screw 1 both ends, all be equipped with mounting hole 21 on first nut seat 2 and the second nut seat 3, install in mounting hole 21 through two ball bearing 4 respectively at lead screw 1 both ends, a set of belleville spring 5 is all equipped with at lead screw 1 both ends of the axial outside of ball bearing 4, be equipped with lock nut 6 on the lead screw 1 of the axial outside of belleville spring 5.

The method specifically comprises the following steps: the right end of the screw 1 is arranged in the mounting hole 21 of the second nut seat 3, two ball bearings 4, a group of belleville springs 5 and a locking nut 6 are sequentially mounted at the right end of the screw 1 from left to right, the second nut seat 3 is connected to the driving device 9, the right end of the screw 1 is connected with an output shaft 91 of the driving device 9 through a coupler (not shown in the figure), and the second nut seat 3 is provided with an operation window 31 so as to facilitate mounting of the coupler. The left end of the screw rod 1 is arranged in the mounting hole 21 of the first nut seat 2, and the left end of the screw rod 1 is sequentially provided with two ball bearings 4, a group of belleville springs 5 and a locking nut 6 from right to left; through set up belleville spring 5 between ball bearing 4 and lock nut 6, just certain flexible surplus has been provided to when lead screw 1 generates heat and extends, can be through belleville spring 5's elastic compensation because of the clearance that the extension produced, with the stable location of the axle head of lead screw 1 on first nut seat 2 and second nut seat 3, avoid the axle head to stretch out and lead to the location unstable, prevent the central skew phenomenon from appearing, the effectual stability and the operation precision that ensure the lead screw.

Specifically, each group of the belleville springs 5 comprises two belleville spring plates 51 which are buckled and installed, so that when the belleville springs 5 are compressed, the stability is high, and the strength of the belleville springs 5 can be guaranteed.

As a further improvement of the foregoing embodiment, a movable ring 7 is further installed between the belleville spring 5 and the ball bearing 4, and the movable ring 7 is in contact with the inner race of the ball bearing 4, so that when the screw 1 is extended, the elastic force of the belleville spring 5 acts on the inner race of the ball bearing 4 through the movable ring 7.

Further, bearing positioning ring 8 is installed through the bolt in the outer end of first nut seat 2 and second nut seat 3, bearing positioning ring 8 with ball bearing 4's outer lane contact, bearing positioning ring 8 middle part still is equipped with and is used for dodging belleville spring 5 and loose ring 7 dodge hole 81 to lock nut 6, belleville spring 5, loose ring 7 and ball bearing 4 are head and tail direct contact in proper order.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.