Lead screw strutting arrangement and lathe
阅读说明:本技术 一种丝杆支撑装置及机床 (Lead screw strutting arrangement and lathe ) 是由 陈成军 杜祥星 张星岗 李朋银 于 2019-11-19 设计创作,主要内容包括:本发明提供了一种丝杆支撑装置和机床,包括丝杆支撑和连接轴;丝杆支撑用于支撑丝杆传动副中的丝杆;连接轴与丝杆相互垂直,丝杆支撑可以围绕连接轴做圆周旋转;丝杆支撑能够在丝杆传动副中的旋转丝母组合经过时脱离丝杆,并且在旋转丝母组合经过后恢复对丝杆的支撑。本发明提供的丝杆支撑装置和机床主要适用于丝母旋转的丝杆传动系统,安全可靠,有效地解决了丝杆水平放置使用时产生的下垂问题,还可以调节丝杆支撑与丝杆之间的支撑力,并且丝杆支撑不会与丝杆产生摩擦,避免了丝杆温升及丝杆支撑磨损的现象出现。(The invention provides a screw rod supporting device and a machine tool, which comprise a screw rod support and a connecting shaft; the screw rod support is used for supporting a screw rod in the screw rod transmission pair; the connecting shaft is vertical to the screw rod, and the screw rod support can rotate around the connecting shaft in a circumferential manner; the screw rod support can be separated from the screw rod when a rotary nut combination in the screw rod transmission pair passes through, and the support for the screw rod is restored after the rotary nut combination passes through. The screw rod supporting device and the machine tool provided by the invention are mainly suitable for a screw rod transmission system for screw rotation, are safe and reliable, effectively solve the problem of sagging of a screw rod when the screw rod is horizontally placed for use, can also adjust the supporting force between the screw rod support and the screw rod, and can prevent the screw rod support from rubbing against the screw rod, thereby avoiding the phenomena of temperature rise of the screw rod and abrasion of the screw rod support.)
1. The utility model provides a lead screw strutting arrangement which characterized in that:
the screw rod support and the connecting shaft are included;
the screw rod support is used for supporting a screw rod in the screw rod transmission pair;
the connecting shaft is vertical to the screw rod, and the screw rod support can rotate around the connecting shaft in a circumferential manner;
the screw rod support can be separated from the screw rod when a rotary nut combination in the screw rod transmission pair passes through, and the support of the screw rod is restored after the rotary nut combination passes through.
2. The lead screw support device of claim 1, wherein:
the screw rod support is of a corner structure and comprises a corner part and two ends extending outwards from the corner part, and the lengths of the two ends are equal;
the corner part is rotatably connected with the connecting shaft;
the end parts of the two ends are provided with grooves, and the grooves can be clamped with the screw rod.
3. The lead screw support device of claim 2, wherein:
the screw rod support is of a right-angle structure.
4. The lead screw support device of any one of claims 1-3, wherein:
the device also comprises a connecting shaft adjusting structure;
the connecting shaft adjusting structure can adjust the relative height of the connecting shaft.
5. The lead screw support device of claim 1, wherein:
the device also comprises a spring pressing system;
the spring pressing system comprises a spring, a spring seat and a supporting base plate, the lower end of the spring is located in the spring seat, the upper end of the spring abuts against the lower surface of the supporting base plate, and the upper surface of the supporting base plate supports the screw rod from the lower side.
6. The lead screw support device of claim 5, wherein:
the spring pressing system also comprises a spring guide shaft positioned below the supporting base plate;
the spring guide shaft comprises a guide rod, and the guide rod is positioned in the inner ring of the spring, extends downwards from the upper end of the spring and extends into the spring seat.
7. The lead screw support device of claim 5, wherein:
the spring pressing system further comprises a spring adjusting structure;
the spring adjustment structure may adjust a degree of compression of the spring relative to the support pad.
8. The lead screw support device of any one of claims 5-7, wherein:
the spring compression system comprises at least one linear bearing kinematic pair;
the linear bearing kinematic pair comprises a light bar and a linear bearing corresponding to the light bar, and the light bar penetrates through an inner hole of the linear bearing and can move along the inner hole.
9. The utility model provides a machine tool, includes that the screw drive is vice, vice including lead screw and rotatory nut combination of lead screw drive, its characterized in that:
further comprising a lead screw support device according to any one of claims 1-8;
the lead screw supporting device supports the lead screw.
10. The machine tool of claim 9, wherein:
the bottom of the rotating nut combination is provided with a collision block;
the collision block is used for preventing the rotary nut combination from directly colliding the screw rod supporting device.
Technical Field
The invention relates to the field of screw rod transmission, in particular to a screw rod supporting device and a machine tool.
Background
With the rapid development of the equipment manufacturing industry, the numerical control machine tool develops towards the direction of large stroke, high speed, high precision and high automation, and the slender screw rod is widely applied to the numerical control machine tool industry. However, when the long and thin screw rod is horizontally placed for use, the screw rod can sag due to factors such as self weight and temperature rise, and the screw rod sags to cause the screw rod to jump during high-speed operation, so that the operation speed and the processing precision of a machine tool are influenced.
At present, the method for solving the drooping of the screw rod mainly comprises a fixed-point supporting mode and a follow-up supporting mode. Sliding friction can occur between the follow-up support and the screw rod, the temperature rise of the screw rod and the abrasion of the supporting block are easily caused, and the servo motor is not suitable for a high-speed machine tool. The fixed point support mainly comprises a mechanical spring support, a pneumatic support, a hydraulic support and the like, wherein the pneumatic and hydraulic supports need more electric and hydraulic control elements, and if the pneumatic and hydraulic elements are aged or failed, the machine tool is collided and a transmission system of the machine tool is damaged. The mechanical spring support has the problems of spring elastic fatigue, large difficulty in supporting force adjustment, easy vibration of the elastic support and the like.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a screw support device and a machine tool that solve the problem of horizontal filament rod sagging.
To achieve the above and other related objects, an embodiment of the present invention provides a lead screw supporting device, characterized in that: the screw rod support and the connecting shaft are included; the screw rod support is used for supporting a screw rod in the screw rod transmission pair; the connecting shaft is vertical to the screw rod, and the screw rod support can rotate around the connecting shaft in a circumferential manner; the screw rod support can be separated from the screw rod when a rotary nut combination in the screw rod transmission pair passes through, and the support of the screw rod is restored after the rotary nut combination passes through.
Optionally, the lead screw is supported in a corner structure, and comprises a corner part and two ends extending outwards from the corner part, and the two ends are equal in length; the corner part is rotatably connected with the connecting shaft; the end parts of the two ends are provided with grooves, and the grooves can be clamped with the screw rod.
Optionally, the lead screw support is a right angle structure.
Further: the device also comprises a connecting shaft adjusting structure; the connecting shaft adjusting structure can adjust the relative height of the connecting shaft.
Still further, a spring hold down system is included; the spring pressing system comprises a spring, a spring seat and a supporting base plate, the lower end of the spring is located in the spring seat, the upper end of the spring abuts against the lower surface of the supporting base plate, and the upper surface of the supporting base plate supports the screw rod from the lower side.
Further, the spring pressing system also comprises a spring guide shaft positioned below the supporting base plate; the spring guide shaft comprises a guide rod, and the guide rod is positioned in the inner ring of the spring, extends downwards from the upper end of the spring and extends into the spring seat.
Further, the spring pressing system also comprises a spring adjusting structure; the spring adjustment structure may adjust a degree of compression of the spring relative to the support pad.
Further, the spring compression system comprises at least one linear bearing kinematic pair; the linear bearing kinematic pair comprises a light bar and a linear bearing corresponding to the light bar, and the light bar penetrates through an inner hole of the linear bearing and can move along the inner hole.
The invention also provides a machine tool, which comprises a screw rod transmission pair, wherein the screw rod transmission pair comprises a screw rod and a rotary screw nut combination, and is characterized in that: further comprising a lead screw support device according to any of the above; the lead screw supporting device supports the lead screw.
Preferably, the bottom of the rotating nut combination is provided with a collision block; the collision block is used for preventing the rotary nut combination from directly colliding the screw rod supporting device.
The screw rod supporting device and the machine tool provided by the invention are mainly suitable for a screw rod transmission system for screw nut rotation, are safe and reliable, and effectively solve the problem of sagging caused by horizontally placing and using a screw rod; the supporting force between the screw rod support and the screw rod can be conveniently and quickly adjusted by adjusting the position of the spring or the connecting shaft; the lead screw supports the lead screw in a rotating mode, friction can not be generated between the lead screw and the lead screw, and the phenomena of temperature rise of the lead screw and abrasion of the lead screw support are avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of the machine tool according to the embodiment of the present invention;
FIG. 2 is a cross-sectional view of a machine tool in an embodiment of the invention;
fig. 3 is a schematic view illustrating an operation state of the lead screw supporting device according to the embodiment of the invention.
In the figure:
1.
4.
7. Polished
10. Nut I11, connecting
13. Connecting shaft adjusting block 14, adjusting bolt 15 and spring seat mounting plate
16. Spring seat 17, spring adjusting bolt 18 and hexagon nut
19. Spring backing plate 20, spring 21 and spring guide shaft
22. Support backing plate 23, bearing 24 and nut II
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Fig. 1 shows a schematic structural diagram of a machine tool in an embodiment of the present invention, including a screw transmission pair and a screw supporting device, which are both fixed on a
The screw rod transmission pair comprises a rotary
The screw rod supporting device comprises a
The connecting shaft system comprises a connecting
The spring compression system comprises a spring seat mounting plate 15, a spring seat 16, a spring 20 and a support backing plate 22. As shown in fig. 2, the machine
Preferably, a spring guide shaft 21 is fixed to the bottom of the support cushion plate 22, as shown in fig. 2, the spring guide shaft 21 in this embodiment is a T-shaped structure, and includes a mounting portion ii and a guide portion, the mounting portion ii is fixed to the support cushion plate 22 through a fixing bolt, and in this embodiment, since the size of the mounting portion ii is larger than the size of the inner ring of the spring 20, the upper end of the spring 20 abuts against the mounting portion ii. The guide part of the guide shaft 21 is a guide rod with the diameter smaller than the inner diameter of the spring 20, and the guide rod is arranged below the mounting part II and is integrated with the mounting part II. The guide rod is positioned in the inner ring of the spring 20, extends downwards from the upper end of the spring 20 until extending into the inner cavity of the tubular structure of the spring seat 16, and the spring guide shaft 21 is matched with the tubular structure of the spring seat 16 in the compression and release processes of the spring 20, so that the spring 20 always moves along the vertical direction. It is to be noted that the length of the guide bar of the spring guide shaft 21 is smaller than the length of the spring 20. In other embodiments, the spring guide shaft 21 may be a guide rod directly disposed at the bottom of the support pad 22 and integrally formed therewith, the guide rod being located within the inner race of the spring 20. Further, the spring pressing system further comprises a spring adjusting structure, and the spring adjusting structure comprises a spring adjusting bolt 17, a hexagon nut 18 and a spring washer 19. As shown in figure 2, a vertical threaded through hole IV is formed in the mounting part I of the spring seat 16, and a spring adjusting bolt 17 passes through the through hole IV from the lower part, extends into the tubular structure of the spring seat 16 and is locked by a hexagon nut 18. The spring backing plate 19 is located in the inner cavity of the spring seat 16, the lower surface of the spring backing plate abuts against the spring adjusting bolt 17, and the upper surface of the spring backing plate abuts against the lower end of the spring 20. By adjusting the spring adjusting bolt 17, the relative height of the spring backing plate 19 in the inner cavity of the spring seat 16 can be adjusted, and the compression degree of the
In this embodiment, the spring pressing system further includes a linear bearing kinematic pair, which is a motion guiding direction of the support base plate 22 and ensures that the support base plate 22 keeps moving up and down horizontally and vertically. The linear bearing kinematic pair comprises a
The preferred embodiment and some modified embodiments of the present invention are described above with reference to fig. 1 to 3, and the working process of the lead screw supporting device of the present invention is briefly described below by taking fig. 3 as a schematic diagram in the above preferred form as an example to deepen understanding of the technical solution of the present invention.
As shown in fig. 3, the moving direction of the
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
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