CN109713840B - Servo pressure cylinder rod rotation preventing device - Google Patents
Servo pressure cylinder rod rotation preventing device Download PDFInfo
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- CN109713840B CN109713840B CN201910063751.0A CN201910063751A CN109713840B CN 109713840 B CN109713840 B CN 109713840B CN 201910063751 A CN201910063751 A CN 201910063751A CN 109713840 B CN109713840 B CN 109713840B
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Abstract
The invention provides a cylinder rod rotation-proof device of a servo pressure cylinder, which comprises: the device comprises a base station and a movable supporting tray, wherein the base station is provided with a guide cylinder; a cylinder body is arranged in the guide cylinder, and the cylinder body is connected with the guide cylinder in a sliding way; the first end of the cylinder body is connected with a screw nut, and the screw nut is connected with a screw in a rotating and sliding manner in a matching manner; the lead screw passes through the lead screw nut and extends out of the cylinder body; the first end of the cylinder body is supported on the base platform through the movable supporting tray, and the second end of the cylinder body is supported on the base platform through the guide cylinder. The anti-rotation device adopts a bearing, the walking wheels move on the base platform, the walking resistance is small, and the control is convenient. Meanwhile, when the output force of the servo pressure cylinder changes, the rolling friction force does not change greatly, the output force of the servo pressure cylinder is approximate to the value of the sensor, and the control precision of the force of the servo pressure cylinder is greatly improved.
Description
Technical Field
The invention relates to the technical field of servo pressure cylinders, in particular to an anti-rotation device for a cylinder rod of a servo pressure cylinder.
Background
The cylinder rod rotation prevention device is an important component of the servo pressure cylinder and cooperates with the screw rod to change the rotation motion into the axial linear motion. The anti-rotation device of the servo pressure cylinder has uniqueness: the requirement load is large, the fit clearance is small, and the smoothness is high. The servo pressure cylinder outputs tens of thousands of newtons, the component force of the reaction force acts on the anti-rotation device, and the static load is very large; the large fit clearance causes the reverse positioning precision of the servo pressure cylinder to be very low, and the instant impact also causes the damage of the anti-rotation device of the pressure cylinder; the smooth degree of the anti-rotation device directly generates damping force to be output to a force sensor of the servo pressure cylinder, and force value judgment of the servo pressure cylinder is influenced. The conventional lever anti-rotation device uses a sliding clearance fit between a key and a key groove, as shown in fig. 3, and the key groove 101 is matched with the key to play a role in preventing rotation. The key groove and the key are both arranged in the round cylinder barrel, the processing difficulty is high, the smoothness is reduced due to the fact that the key is stressed and deformed when fixed, the sliding friction force is in direct proportion to the end face pressure, when the output force of the servo cylinder barrel is changed, the sliding damping force of the key is increased along with the change of the output force, the resultant force of the sliding damping force is the numerical value of the sensor, the electric energy cannot distinguish the source of the force, the output force is inaccurate, and the control is inaccurate.
Disclosure of Invention
The invention solves the technical problem of ensuring that a cylinder rod only moves along the axial direction, the damping force is reduced, and the pressure floating is reduced, and provides an anti-rotation device for a cylinder rod of a servo pressure cylinder, which comprises: the device comprises a base station and a movable supporting tray, wherein the base station is provided with a guide cylinder; a cylinder body is arranged in the guide cylinder, and the cylinder body is connected with the guide cylinder in a sliding way;
the first end of the cylinder body is connected with a screw nut, and the screw nut is connected with a screw in a rotating and sliding manner in a matching manner; the lead screw passes through the lead screw nut and extends out of the cylinder body;
the first end of the cylinder body is supported on the base platform through the movable supporting tray, and the second end of the cylinder body is supported on the base platform through the guide cylinder.
Preferably, the mobile support tray is provided with a bracket;
a first screw is connected to a first end of the bracket, a first bearing is sleeved outside the first screw, and a first travelling wheel is sleeved outside the first bearing;
the second end of bracket is connected with the second screw, and the outside cover of second screw is equipped with the second bearing, and the outside cover of second bearing is equipped with the second walking wheel.
Preferably, the bracket is provided with a U-shaped groove, and the cylinder body is clamped in the U-shaped groove;
at least two fixing pin holes are formed in the groove bottom of the U-shaped groove;
the fixed pin passes through the fixed pin hole and is connected with the cylinder body in a matching way, so that the cylinder body is fixed with the U-shaped groove.
Preferably, the first end of the bracket is provided with a fastening screw hole; the fastening screw penetrates through the fastening screw hole to be propped against the first screw, and the first screw is locked;
the second end of the bracket is provided with a fastening screw hole; the fastening screw penetrates through the fastening screw hole to be propped against the second screw, and the second screw is locked.
Preferably, a gasket is arranged between the first bearing and the bracket;
a gasket is arranged between the second screw and the bracket.
Preferably, a space is arranged between the bracket and the base.
Preferably, the bottom of the guide cylinder is provided with a bottom connecting surface, and the bottom connecting surface is connected with the base station through bolts and nuts;
the two ends of the cylinder body respectively extend out of the guide cylinder.
Preferably, the screw nut is fixedly arranged at the first end of the cylinder body through a plurality of fixing bolts.
According to the technical scheme, the invention has the following advantages:
the anti-rotation device adopts a bearing, the walking wheels move on the base platform, the walking resistance is small, and the control is convenient. The extension section of the screw rod extending out of the cylinder body is matched with the driving mechanism, the screw rod is enabled to rotate relative to a screw nut of the screw rod under the matching of the driving mechanism, the cylinder body is driven to move forwards or backwards on the base station, the walking is smooth, the cylinder body is controlled to move through the rotation of the screw rod, the control precision is high, after sliding friction is changed into rolling friction, damping force is reduced, meanwhile, when the output force of the servo pressure cylinder changes, the rolling friction force does not change greatly, the output force of the servo pressure cylinder is approximate to the value of a sensor, and the control precision of the force of the servo pressure cylinder is greatly improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, 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 that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic structural view of a cylinder rod rotation preventing device of a servo pressure cylinder;
fig. 2 is a schematic view of the structure in the direction of a-a in fig. 1.
Fig. 3 is a schematic diagram of the prior art.
Detailed Description
The invention provides a cylinder rod rotation preventing device of a servo pressure cylinder, as shown in figures 1 and 2, comprising: the device comprises a base station 1 and a movable supporting tray 11, wherein a guide cylinder 10 is arranged on the base station; a cylinder body 5 is arranged in the guide cylinder 10, and the cylinder body 5 is connected with the guide cylinder 10 in a sliding manner; the first end of the cylinder body 5 is connected with a screw nut 3, and the screw nut 3 is matched and connected with a screw 2 in a rotating and sliding mode; the lead screw 2 passes through the lead screw nut 3 and extends out of the cylinder body 5; the cylinder 5 is supported at a first end thereof on the base 1 by the movable support tray 11, and at a second end thereof, the cylinder 5 is supported on the base 1 by the guide cylinder 10.
The extension section of the screw 2 extending out of the cylinder 5 is matched with the driving mechanism, and under the matching of the driving mechanism, the screw 2 rotates relative to the screw nut 3 to drive the cylinder 5 to move forwards or backwards on the base platform 1. The movable support tray 11 serves to support the first end of the cylinder 5.
It will be understood that when an element or layer is referred to as being "on," connected to, "or" coupled to "another element or layer, it can be directly on, connected or coupled to the other element or layer, and intervening elements or layers may also be present. In contrast, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers present. Like numbers refer to like elements throughout. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the present invention, the mobile support tray 11 is provided with a bracket 14; a first screw 6 is connected to a first end of the bracket 14, a first bearing 7 is sleeved outside the first screw 6, and a first travelling wheel is sleeved outside the first bearing 7; the second end of bracket 14 is connected with second screw 21, and the outside cover of second screw 21 is equipped with second bearing 22, and the outside cover of second bearing 22 is equipped with the second walking wheel.
That is, the bracket 14 carries a first end of the cylinder 5, and drives the driving mechanism to rotate the lead screw 2 relative to the lead screw nut 3, thereby moving the cylinder 5 forward or backward on the base 1. The drive mechanism may be a servo motor.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
It should be further noted that the bracket 14 is provided with a U-shaped groove, and the cylinder body 5 is clamped in the U-shaped groove; at least two fixing pin holes 13 are arranged at the groove bottom of the U-shaped groove; the fixing pin passes through the fixing pin hole 13 to be matched and connected with the cylinder body 5, so that the cylinder body 5 is fixed with the U-shaped groove.
A fastening screw hole 9 is arranged at the first end of the bracket 14; the fastening screw penetrates through the fastening screw hole 9 to be propped against the first screw 6, and the first screw 6 is locked; preventing the first screw 6 from loosening.
A second end of the bracket 14 is provided with a fastening screw hole 9; the fastening screw passes through the fastening screw hole 9 and is propped against the second screw 21, and the second screw 21 is locked. Preventing the second screw 21 from loosening.
A gasket 8 is arranged between the first bearing 7 and the bracket 14; a washer 8 is provided between the second screw 21 and the bracket 14. It is possible to prevent friction from being generated between the bearing and the bracket 14, which causes an increase in resistance. And then make, cylinder pole rotational lock adopt ball bearing to fix on the cylinder pole, roll along the plane, play the cylinder pole and prevent changeing and reduce the effect of damping force, the numerical value that the cylinder pole fed back the force transducer is steady, and the error that the damping introduced obviously descends.
A space is provided between the bracket 14 and the base 1. The movement of the movable support tray 11 on the base can be ensured.
In the present invention, the base 1 and the guide cylinder 10 can be seen as a single body as a support portion of the present apparatus. The cylinder 5, the screw nut 3, the screw 2 and the movable support tray 11 are moving parts. The movable support tray 11 can be moved along the top surface of the base 1. The screw 2 rotates, linearly rotating under the constraint of the support portion. The specific operation process is that the screw rod 2 rotates anticlockwise, the moving support tray 11 of the moving part is extruded, the screw rod 2 and the screw rod nut 3 slide relatively, and the moving part is pushed to extend. The screw 2 rotates clockwise and the moving support tray 11 of the moving part is squeezed, causing the screw 2 and the screw nut 3 to slide relatively, pushing the moving part to retract.
The anti-rotation device adopts the bearing to roll along the plane, the planar machining difficulty is low, the precision is high, the standardization degree of the bearing is high and stable, so that the fit clearance is greatly reduced, after the sliding friction is changed into the rolling friction, the damping force is reduced to about 1/15 of the original damping force, meanwhile, the rolling friction force is not greatly changed when the output force of the servo pressure cylinder is changed, the output force of the servo pressure cylinder is approximate to the value of a sensor, and the control precision of the servo pressure cylinder force is greatly improved.
The bottom of the guide cylinder 10 is provided with a bottom connecting surface which is connected with the base station 1 through bolts and nuts; the two ends of the cylinder body 5 respectively extend out of the guide cylinder 10, and the guide cylinder 10 and the base platform 1 can be detachably connected.
The screw nut 3 is fixedly arranged at the first end of the cylinder body 5 through a plurality of fixing bolts 16. Is convenient for the operator to disassemble and assemble.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. The utility model provides a servo pressure cylinder jar pole rotational lock which characterized in that includes: the device comprises a base platform (1) and a movable supporting tray (11), wherein a guide cylinder (10) is arranged on the base platform; a cylinder body (5) is arranged in the guide cylinder (10), and the cylinder body (5) is connected with the guide cylinder (10) in a sliding way;
the first end of the cylinder body (5) is connected with a screw nut (3), and the screw nut (3) is matched and connected with a screw (2) in a rotating and sliding mode; the lead screw (2) passes through the lead screw nut (3) and extends out of the cylinder body (5);
a first end of the cylinder body (5) is supported on the base platform (1) through a movable supporting tray (11), and a second end of the cylinder body (5) is supported on the base platform (1) through a guide cylinder (10);
the movable supporting tray (11) is provided with a bracket (14);
a first screw (6) is connected to a first end of the bracket (14), a first bearing (7) is sleeved outside the first screw (6), and a first travelling wheel is sleeved outside the first bearing (7);
a second screw (21) is connected to a second end of the bracket (14), a second bearing (22) is sleeved outside the second screw (21), and a second travelling wheel is sleeved outside the second bearing (22);
the bracket (14) is provided with a U-shaped groove, and the cylinder body (5) is clamped in the U-shaped groove;
at least two fixing pin holes (13) are arranged at the groove bottom of the U-shaped groove;
the fixing pin penetrates through the fixing pin hole (13) to be matched and connected with the cylinder body (5), so that the cylinder body (5) is fixed with the U-shaped groove;
a fastening screw hole (9) is arranged at the first end of the bracket (14); the fastening screw penetrates through the fastening screw hole (9) to be propped against the first screw (6) so as to lock the first screw (6);
a fastening screw hole (9) is arranged at the second end of the bracket (14); the fastening screw penetrates through the fastening screw hole (9) and is propped against the second screw (21) to lock the second screw (21).
2. The anti-rotation device for cylinder rod of servo cylinder according to claim 1,
a gasket (8) is arranged between the first bearing (7) and the bracket (14);
a gasket (8) is arranged between the second screw (21) and the bracket (14).
3. The anti-rotation device for cylinder rod of servo cylinder according to claim 1,
a space is arranged between the bracket (14) and the base (1).
4. The anti-rotation device for cylinder rod of servo cylinder according to claim 1,
the bottom of the guide cylinder (10) is provided with a bottom connecting surface, and the bottom connecting surface is connected with the base station (1) through bolts and nuts;
two ends of the cylinder body (5) respectively extend out of the guide cylinder (10).
5. The anti-rotation device for cylinder rod of servo cylinder according to claim 1,
the screw rod and the screw nut (3) are fixedly arranged at the first end of the cylinder body (5) through a plurality of fixing bolts (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910063751.0A CN109713840B (en) | 2019-01-23 | 2019-01-23 | Servo pressure cylinder rod rotation preventing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910063751.0A CN109713840B (en) | 2019-01-23 | 2019-01-23 | Servo pressure cylinder rod rotation preventing device |
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| Publication Number | Publication Date |
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| CN109713840A CN109713840A (en) | 2019-05-03 |
| CN109713840B true CN109713840B (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910063751.0A Active CN109713840B (en) | 2019-01-23 | 2019-01-23 | Servo pressure cylinder rod rotation preventing device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201113645Y (en) * | 2007-09-11 | 2008-09-10 | 银川西部大森数控技术有限公司 | Servo-jar |
| CN203272325U (en) * | 2013-05-17 | 2013-11-06 | 天津钢管集团股份有限公司 | Anti-rotation structure of rolling mill servo cylinder |
| CN207321031U (en) * | 2017-08-24 | 2018-05-04 | 润达精密股份有限公司 | Electric cylinder force-output shaft limits not rotating mechanism |
| CN207511331U (en) * | 2017-11-03 | 2018-06-19 | 南通合强液压科技有限公司 | A kind of high-precision electric servoBcylinder feed device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4974464A (en) * | 1988-03-17 | 1990-12-04 | Erikson Kenneth W | Motorized anti-backlash linear actuator |
| DE19943709C2 (en) * | 1999-09-08 | 2002-07-18 | Demag Ergotech Wiehe Gmbh | Precision injection unit |
-
2019
- 2019-01-23 CN CN201910063751.0A patent/CN109713840B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201113645Y (en) * | 2007-09-11 | 2008-09-10 | 银川西部大森数控技术有限公司 | Servo-jar |
| CN203272325U (en) * | 2013-05-17 | 2013-11-06 | 天津钢管集团股份有限公司 | Anti-rotation structure of rolling mill servo cylinder |
| CN207321031U (en) * | 2017-08-24 | 2018-05-04 | 润达精密股份有限公司 | Electric cylinder force-output shaft limits not rotating mechanism |
| CN207511331U (en) * | 2017-11-03 | 2018-06-19 | 南通合强液压科技有限公司 | A kind of high-precision electric servoBcylinder feed device |
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| CN109713840A (en) | 2019-05-03 |
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