CN213135834U - Dynamic auxiliary supporting system of large-stroke ball screw - Google Patents
Dynamic auxiliary supporting system of large-stroke ball screw Download PDFInfo
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- CN213135834U CN213135834U CN202021936142.6U CN202021936142U CN213135834U CN 213135834 U CN213135834 U CN 213135834U CN 202021936142 U CN202021936142 U CN 202021936142U CN 213135834 U CN213135834 U CN 213135834U
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- ball screw
- auxiliary supporting
- auxiliary
- screw
- nut
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Abstract
The utility model relates to the technical field of slide rails, in particular to a dynamic auxiliary support system for a large-stroke ball screw, which comprises a screw, a ball screw support seat, an auxiliary support seat roller, an auxiliary support seat, an auxiliary support system fixing plate, a slide block, a slide rail and a nut; the two ends of the screw rod are mounted on a numerical control device lathe bed through the supporting seats, the nut is sleeved on the screw rod, the slide rail is fixed on the numerical control device lathe bed, the bottom of the auxiliary supporting system fixing plate is connected with the slide rail through the slide block, the auxiliary supporting seat idler wheel is mounted on the auxiliary supporting system fixing plate through the auxiliary supporting seat, and the auxiliary supporting seat idler wheel is in contact fit with the bottom of the screw rod. The phenomenon of droop deformation of the large-stroke ball screw due to self weight is avoided, so that the shaking, abnormal sound and poor precision of equipment caused by the bending deformation of the screw during running are avoided, and the service life of the screw is prolonged.
Description
Technical Field
The utility model relates to a slide rail technical field especially relates to a big stroke ball screw developments auxiliary stay system.
Background
At present, ball screw (ball) is adopted in the feed transmission of most digit control machine tool, the stroke overlength (being greater than 5m) when the feed shaft, or ball screw's slenderness ratio (the ratio of length and external diameter) is too big (being greater than 60), the screw rod receives dead weight influence easily this moment and produces flagging to lead to the screw rod to produce the shake in rotatory time, and then lead to the fact the screw rod noise increase, unusual phenomena such as overheated, influence the machining precision of equipment simultaneously, and lead to ball screw and support bearing life-span to shorten. Therefore, it is necessary to improve the sagging deformation of the large-stroke ball screw due to its own weight to ensure the accuracy and life of the apparatus.
Increasing the outer diameter of the ball screw and increasing the pretensioning force on the ball screw can improve this phenomenon. However, increasing the outer diameter of the ball screw will increase the rotational inertia of the screw, so the outer diameter cannot be increased infinitely, otherwise the outer diameter cannot be matched with the inertia of the driving motor and the reducer. Increasing the pretensioning force on the ball screw shortens the service life of the ball screw itself and the screw support bearing, and an excessive pretensioning force burns out the support bearing, so that the pretensioning force cannot be increased infinitely. Therefore, for a large-stroke ball screw, the most economical and effective method for preventing the screw from sagging and deforming due to self-weight is to add an auxiliary support in the stroke of the ball screw. The conventional auxiliary support is to support the screw by hydraulic pressure or a spring to provide a supporting force, when the nut moves to an auxiliary support position, the auxiliary support is lowered to avoid the moving track of the nut, and during the process that the nut passes through the auxiliary support, the ball screw is in a state of losing the auxiliary support.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the not enough of above-mentioned technique, and provide a big stroke ball screw developments auxiliary stay system.
The utility model discloses a realize above-mentioned purpose, adopt following technical scheme: the utility model provides a big stroke ball screw developments auxiliary stay system which characterized in that: the device comprises a screw, a ball screw supporting seat, an auxiliary supporting seat roller, an auxiliary supporting seat, an auxiliary supporting system fixing plate, a sliding block, a sliding rail and a nut; the two ends of the screw rod are mounted on a numerical control device lathe bed through the supporting seats, the nut is sleeved on the screw rod, the slide rail is fixed on the numerical control device lathe bed, the bottom of the auxiliary supporting system fixing plate is connected with the slide rail through the slide block, the auxiliary supporting seat idler wheel is mounted on the auxiliary supporting system fixing plate through the auxiliary supporting seat, and the auxiliary supporting seat idler wheel is in contact fit with the bottom of the screw rod.
Preferably, the two ends of the nut are provided with anti-collision blocks.
The utility model has the advantages of providing auxiliary support for the large-stroke ball screw. The phenomenon of droop deformation of the large-stroke ball screw due to self weight is avoided, so that the shaking, abnormal sound and poor precision of equipment caused by the bending deformation of the screw during running are avoided, and the service life of the screw is prolonged. The supporting position can be changed along with the position change of the nut of the ball screw, and the ball screw is ensured to be effectively supported in the full stroke. And the roller type support is adopted, so that the influence of friction resistance on the operation of the ball screw is reduced.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of the auxiliary support system of the present invention;
fig. 3 is a side view of the auxiliary supporting seat of the present invention.
Detailed Description
Spatially relative terms such as "above … …", "above … …", "above … …", "above", and the like, may be used herein for ease of description to describe the spatial relationship of one feature or characteristic to another feature or characteristic as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In order to solve the problem that a large-stroke ball screw of large numerical control equipment is easily sagged and deformed due to self weight, the invention provides a dynamic auxiliary supporting system which is suitable for the situation and can move along with the movement of a nut of the ball screw. The auxiliary supporting system is positioned between the screw supporting seats at the two ends of the ball screw and consists of two auxiliary supporting units provided with rollers, and the two auxiliary supporting units are fixed by a fixing plate and connected into a rigid whole so as to ensure that the two auxiliary supporting units can keep the same motion state to advance and retreat together. The two auxiliary supporting units are respectively arranged on the sliding blocks of a pair of linear sliding rails, so that the two auxiliary supporting units can smoothly move linearly. The two auxiliary supporting units are distributed on two sides of the nut of the ball screw, and the distance between the two auxiliary supporting units is set to be 1/2 of the span of the supporting seats on two sides of the ball screw, so as to ensure that at least one point of auxiliary support is still arranged between the supporting seats on two sides of the ball screw in an extreme state. And the auxiliary supporting unit contacts and supports the ball screw through the roller, so that the influence of the friction resistance on the ball screw system is reduced to the maximum extent.
As shown in fig. 1, a ball screw (composed of a screw 1 and a nut 11) is mounted on a bed 10, and forms a conventional numerical control device transmission system together with the bed 10, a workbench 2 and a ball screw support 4. Between the ball screw supports 4, a linear slide rail system (composed of a slide block 8 and a slide rail 9) is laid on the bed 10. A fixed plate 7 is arranged on the slide block 8 of the linear slide rail to connect and fix the two slide blocks 8 of the linear slide rail system, so that the two slide blocks 8 can keep the same motion state in a rigid system to advance and retreat together. The fixing plate 7 serves as a mounting surface for two auxiliary supporting seats 6 at the same time, and is used for bearing the two auxiliary supporting seats 6. The two auxiliary bearings 6 are located on both sides of the nut 11 of the ball screw, and the distance between the two auxiliary bearings 6 is set to 1/2 of the distance between the two bearings 4 of the ball screw (composed of the screw 1 and the nut 11). When the motor of the numerical control device drives the ball screw (composed of the screw 1 and the nut 11) to drive the workbench 2 to do linear motion, the two auxiliary supporting seats 6 can provide auxiliary support outside the supporting seats 4 at the two sides of the ball screw in the stroke of the ball screw. And when the nut 11 of the ball screw rod runs over the full-length distance between the auxiliary supporting seats 6, the anti-collision block 3 outside the nut 11 (or the nut seat connected with the workbench 2 by the nut 11 depending on the installation mode of the nut 11 and the workbench 2) can push the auxiliary supporting seats 6 to continue to move forwards linearly until the stroke end point of the ball screw rod. In the process, the auxiliary support seats 6 on both sides of the nut 11 provide support for the ball screw at all times. In the limit state, when the auxiliary support 6 at one end is pushed to the end of the ball screw stroke by the anti-collision block 3, the auxiliary support 6 at the other end still provides auxiliary support at the middle point of the distance between the support seats 4 at the two sides of the ball screw, thereby ensuring that the ball screw can obtain effective auxiliary support under the full stroke. When the ball screw moves in the reverse direction, the above movement is repeated, and the auxiliary support is still kept in the full stroke of the ball screw.
With reference to the detail of the auxiliary support 6, fig. 3 shows that the upper end of the auxiliary support 6 has two projections, which are provided with rollers 5. The auxiliary supporting system is provided with two auxiliary supporting seats 6, two rollers 5 are arranged on each supporting seat 6, and the auxiliary supporting seats 6 are in contact with a screw rod 1 of a ball screw through the rollers 5 so as to reduce the influence of friction resistance on the ball screw system.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (2)
1. The utility model provides a big stroke ball screw developments auxiliary stay system which characterized in that: the device comprises a screw, a ball screw supporting seat, an auxiliary supporting seat roller, an auxiliary supporting seat, an auxiliary supporting system fixing plate, a sliding block, a sliding rail and a nut; the two ends of the screw rod are mounted on a numerical control device lathe bed through the supporting seats, the nut is sleeved on the screw rod, the slide rail is fixed on the numerical control device lathe bed, the bottom of the auxiliary supporting system fixing plate is connected with the slide rail through the slide block, the auxiliary supporting seat idler wheel is mounted on the auxiliary supporting system fixing plate through the auxiliary supporting seat, and the auxiliary supporting seat idler wheel is in contact fit with the bottom of the screw rod.
2. The large stroke ball screw dynamic auxiliary support system of claim 1, wherein: and two ends of the nut are provided with anti-collision blocks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021936142.6U CN213135834U (en) | 2020-09-08 | 2020-09-08 | Dynamic auxiliary supporting system of large-stroke ball screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021936142.6U CN213135834U (en) | 2020-09-08 | 2020-09-08 | Dynamic auxiliary supporting system of large-stroke ball screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213135834U true CN213135834U (en) | 2021-05-07 |
Family
ID=75710468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021936142.6U Active CN213135834U (en) | 2020-09-08 | 2020-09-08 | Dynamic auxiliary supporting system of large-stroke ball screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213135834U (en) |
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2020
- 2020-09-08 CN CN202021936142.6U patent/CN213135834U/en active Active
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