CN101220854B - Motor push rod - Google Patents
Motor push rod Download PDFInfo
- Publication number
- CN101220854B CN101220854B CN2008100188886A CN200810018888A CN101220854B CN 101220854 B CN101220854 B CN 101220854B CN 2008100188886 A CN2008100188886 A CN 2008100188886A CN 200810018888 A CN200810018888 A CN 200810018888A CN 101220854 B CN101220854 B CN 101220854B
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- bearing
- screw mandrel
- casing
- ring
- worm gear
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Abstract
The invention relates to an electric push rod which can achieve reciprocating motion, comprising a motor, a worm wheel worm reducer, an internal sleeve, a box body and a leading screw and a nut with a thread section. The motor is arranged at the external side of the box body; the output shaft of the motor is connected with the worm wheel worm reducer; the leading screw is also provided with a connecting section and a bearing seat section which is step-shaped, with the diameter less than that of the connecting section; the connecting section of the leading screw is connected with the connecting hole of a worm wheel; the nut which is sheathed on the leading screw is connected with one end of the internal sleeve; the other end of the internal sleeve is connected with a front supporter; a bearing is arranged between the bearing seat section of the leading screw and a bearing seat which is arranged at one end of the box body; a retaining ring which is connected with the leading screw and a hinge supporter which is connected with the end of the box body respectively press one end of an internal ring and an external ring of the bearing; the other ends of the internal ring and the external ring of the bearing are respectively connected with the shaft shoulder of the leading screw and the end surface of the box body bearing seat; a supporting ring is arranged between the thread section of the leading screw and the box body; a box cover is connected with the other end of the box body and one end of the supporting ring. The invention is characterized by high bearing capability and low noise.
Description
Technical field
The present invention relates to a kind of electric pushrod, belong to the reciprocating push rod device of electric drive.
Background technique
The electric pushrod that is used for electric actuator is mainly by motor, worm type of reduction gearing, screw mandrel, nut and shell constitute, motor is connected with screw mandrel by retarder, be set with nut on the screw mandrel, nut is connected with screw-thread fit on the screw mandrel, nut is connected with the rear end of inner sleeve, and worm type of reduction gearing is installed in the enclosure, thrust-bearing and tension bearing are installed in the axle journal place of worm gear both sides respectively, and thrust-bearing and tension bearing carry out axially locating by the shell and the end cap of worm gear both sides respectively, after machine operation, by worm type of reduction gearing and two bearing supporting strap movable wire bar rotations, screw mandrel by the nut that is mated with the rotation motion motion that is in line, nut then drives inner sleeve and moves forward and backward, thereby the joint that is connected the inner sleeve front portion is also seesawed.After push rod arrived desired location, the sensitive switch action was closed motor.When bearing pulling force, then reach on the worm gear by tension bearing when the push rod retraction.Its shell of the electric pushrod of this kind structure is an overall structure, owing to be subjected to the restriction of mounting structure, the bearing specification that bears pulling force is less than the bearing specification of bearing thrust, therefore present disclosed electric pushrod all exists pulling force less than 1/3 thrust, because of the actual bearer pulling force descends, easily cause damage of bearings.On the other hand, because thrust-bearing and tension bearing carry out axially locating by worm gear and housing and end cap, it still is that bearing thrust all can act on worm gear that push rod bears pulling force, all adopt working of plastics for reducing the noise worm gear, so can produce distortion after the worm gear extruding, cause the worm and gear engaging position to change, not only can influence transmission efficiency, and also can produce big noise.Moreover, the thrust-bearing of this kind structure and tension bearing all are installed in the axle journal place of worm gear both sides, thrust-bearing and thrust axis bear the accuracy of manufacturing of worm gear and the influence of worm gear extrusion-deformation, and the coaxality of two bearings is difficult for guaranteeing, can produce bigger noise when also making push rod work.
Summary of the invention
The purpose of this invention is to provide a kind of electronic thrust that can improve bearing capacity and reduce operational noise.
Further purpose of the present invention provides the strong electric pushrod of a kind of self-lock ability.
The present invention is that the technological scheme that achieves the above object is: a kind of electric pushrod, comprise motor, worm type of reduction gearing, inner sleeve, casing and have the screw mandrel and the nut of thread section, it is characterized in that: described motor is installed in the lateral part of casing, and motor output shaft is connected with worm type of reduction gearing; Described screw mandrel also has linkage section and is step-like bearing support section less than the linkage section diameter, and the linkage section of screw mandrel is connected with the attachment hole of worm gear, and the nut that is sleeved on the screw mandrel is connected with an end of inner sleeve, and the other end of inner sleeve is connected with preceding bearing; Between the bearing support of the bearing support section of screw mandrel and casing one end bearing is installed, the hinged-support that is connected the back-up ring on the screw mandrel and is connected the casing end is pressed in an end of bearing enclose respectively, the other end of bearing enclose respectively with screw mandrel on the shaft shoulder and the end face of housing bearing seat join, between the thread section of screw mandrel and the casing bearing ring is installed, case lid is connected the other end of casing and joins with an end of bearing ring.
The present invention is that another technological scheme that achieves the above object is: the helix angle of the thread section of described screw mandrel≤6 °.
The present invention has the following advantages after adopting technique scheme:
1, rational in infrastructure, can improve bearing capacity.Bearing Installation of the present invention is between the bearing support section of the bearing support of casing and screw mandrel, one end of bearing enclose is located by the shaft shoulder of bearing support section one side and the end face of housing bearing seat respectively, the other end of bearing enclose is then by the back-up ring and the location of the hinged-support on the casing that are installed on the screw mandrel, therefore when worm screw drive screw mandrel moves back and forth, all reach on this bearing by casing and screw mandrel thrust and pulling force, make this bearing can bear the thrust and the pulling force of equivalent push rod.The present invention has improved the bearing capacity of electric pushrod owing to increased the pulling force of push rod, the motor output power under 75 watts, the dynamic load≤7000N of electric pushrod, static load≤10000N.
2, installing and locating is accurate, and noise is low.Casing of the present invention and case lid are for dividing body structure, and bearing, bearing ring and worm gear are installed on the screw mandrel, bearing is to make axially locating by casing, screw mandrel, hinged-support and back-up ring, and bearing ring carries out axially locating by case lid, therefore can make the bearing, bearing ring and the worm gear that are installed on the screw mandrel on same axial reference, guarantee the worm gear of rotation and be positioned at the bearing of worm gear two-side supporting on screw mandrel and the coaxality of bracing ring, guarantee the accuracy of mesh of worm and wheel, reduce operational noise.
3, transmission efficiency is stable.The present invention bears the thrust and the pulling force of screw mandrel by bearing, owing to improved the force-bearing situation of worm gear, the engaging position of worm gear and worm screw can not change, and transmission efficiency is stable, and has also further reduced operational noise.
4, the screw mandrel self-lock ability is strong.The present invention is controlled at the helix angle of wire rod thread section in 6 °, makes to have certain self-lock force between nut and the screw mandrel.
Description of drawings
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the side-looking structural representation of Fig. 1.
Wherein: bearing before the 1-, 2-guide sleeve, 3-sensitive switch, 4-outer sleeve, the spacing muscle of 4-1-, 5-screw mandrel, 5-1-thread section, 5-2-linkage section, 5-3-bearing support section, 6-inner sleeve, 7-nut, 8-case lid, the 9-bearing ring, 10-casing, 11-worm screw, 12-worm gear, the 12-1-ring set, 12-2-supports muscle, 13-bearing, the 14-back-up ring, 15-motor, 16-hinged seat.
Embodiment
See shown in Fig. 1,2, electric pushrod of the present invention comprises motor 15, worm type of reduction gearing, inner sleeve 6, casing 10 and has the screw mandrel 5 and the nut 7 of screw thread, motor 15 is installed in the outer end of casing 10, motor 15 output shafts are connected with worm type of reduction gearing, worm type of reduction gearing is made of with worm gear 12 worm screw 11 that is meshed, the output shaft of motor 15 of the present invention can directly adopt worm screw 11, or the output shaft of motor 15 is connected with worm screw 11, and power is reached worm type of reduction gearing.See shown in Figure 1, screw mandrel 5 of the present invention has thread section 5-1, linkage section 5-2 and less than linkage section 5-2 diameter and be step-like bearing support section 5-3, the linkage section 5-2 of screw mandrel 5 is connected in the attachment hole of worm gear 12, its periphery of linkage section 5-2 of this screw mandrel 5 is provided with axial straight-tooth, the attachment hole interference of worm gear 12 is crimped on the linkage section 5-2 of screw mandrel 5, and screw mandrel 5 is connected with worm gear 12.Its periphery of linkage section 5-2 of screw mandrel 5 of the present invention also can be provided with helical teeth or annular knurl, and the attachment hole of worm gear 12 is bonded on the linkage section 5-2 of screw mandrel 5, and screw mandrel 5 is connected on the worm gear 12, and power is reached on the screw mandrel 5.See shown in Figure 1, the present invention has mechanical property preferably for making worm gear 12, the length of worm gear 12 attachment holes is greater than the length of worm gear Surface of action, and worm gear 12 sidepieces also are provided with stiffening rib, this stiffening rib can be illustrated in figure 1 as uniform support muscle 12-2 radially, or/and be provided with ring set 12-1 at the opposite side of worm gear 12.See shown in Figure 1, nut 7 is sleeved on the screw mandrel 5, rotatablely moving of screw mandrel 5 become nut 7 straight line motions, nut 7 is connected with an end of inner sleeve 6, these nut 7 one sides be provided with outside thread, and the internal thread that inner sleeve 6 is provided with, inner sleeve 6 is screwed on the nut 7 and is spacing by the shaft shoulder on the nut 7, quickly and easily inner sleeve 6 is connected on the nut 7, the other end of inner sleeve 6 is connected with preceding bearing 1, drives inner sleeve 6 by nut 7 and does reciprocating linear motion.Between the bearing support of the bearing support section 5-3 of screw mandrel 5 of the present invention and casing 10 1 ends bearing 13 is installed, the end face of casing 10 is connected with hinged-support 16, and be connected with back-up ring 14 on the screw mandrel 5, back-up ring 14 and hinged-support 16 are crimped on an end of bearing 13 Internal and external cycles respectively, and the other end of bearing 13 Internal and external cycles by respectively with screw mandrel 5 on the shaft shoulder and the end face of casing 10 bearing supports join spacing, this back-up ring 14 can adopt locking nut, screw mandrel 5 is provided with screw thread, by locking nut bearing 13 is carried out axial limiting.When nut 7 moves back and forth, by casing 10 and screw mandrel 5 thrust and pulling force are reached on this bearing 13, between the thread section 5-1 of screw mandrel 5 and the casing 10 bearing ring 9 is installed, case lid 8 is connected on the casing 10, case lid 8 of the present invention is provided with seam, one end of casing 10 is arranged on the stop portion of case lid 8, and an end of the end of case lid 8 and bearing ring 9 joins, and bearing ring 9 is carried out axial limiting.
See shown in Fig. 1,2, the present invention also has outer sleeve 4, outer sleeve 4 is installed on the case lid 8, one end of outer sleeve 4 withstands on the bearing ring 9, and the other end of outer sleeve 4 is equipped with guide sleeve 2, and 6 of inner sleeves are bearing in guide sleeve 2 endoporus places, and the inwall of outer sleeve 4 is provided with the spacing muscle 4-1 that prevents nut 7 rotations, to guarantee nut 7 straight line motions, the sensitive switch 3 of control screw mandrel stroke also is installed in the outer sleeve 4 and connects lead, keep the electric pushrod outward appearance clean and tidy.
When the present invention worked, motor 15 drove worm gear reducer and rotates, and 5 of screw mandrels that are connected on the worm gear 12 rotate, and are enclosed within nut 7 moving linearlies of screw mandrel 5, and nut 7 drives inner sleeve 6 and does straight reciprocating motion, realizes the reciprocating sliding campaign of push rod.
Claims (7)
1. electric pushrod, comprise motor (15), worm type of reduction gearing, inner sleeve (6), casing (10) and have screw mandrel (5) and the nut (7) of thread section (5-1), it is characterized in that: described motor (15) is installed in the outside of casing (10), and the output shaft of motor (15) is connected with worm type of reduction gearing; Described screw mandrel (5) also has linkage section (5-2) and is step-like bearing support section (5-3) less than linkage section (5-2) diameter, the linkage section (5-2) of screw mandrel (5) is connected with the attachment hole of worm gear (12), the nut (7) that is sleeved on the screw mandrel (5) is connected with an end of inner sleeve (6), and the other end of inner sleeve (6) is connected with preceding bearing (1); Between the bearing support section (5-3) of screw mandrel (5) and the bearing support of casing (10) one ends bearing (13) is installed, the hinged-support (16) that is connected the back-up ring (14) on the screw mandrel (5) and is connected casing (10) end is pressed in an end of bearing (13) Internal and external cycle respectively, the other end of bearing (13) Internal and external cycle respectively with screw mandrel (5) on the shaft shoulder and the end face of casing (10) bearing support join, between the thread section (5-1) of screw mandrel (5) and the casing (10) bearing ring (9) is installed, case lid (8) is connected the other end of casing (10) and joins with an end of bearing ring (9).
2. electric pushrod according to claim 1 is characterized in that: helix angle≤6 of described screw mandrel (5) thread section °.
3. electric pushrod according to claim 1 is characterized in that: the periphery of the linkage section (5-2) of described screw mandrel (5) is provided with axial straight-tooth, and the attachment hole interference of worm gear (12) is crimped on the linkage section (5-2) of screw mandrel (5).
4. electric pushrod according to claim 1 is characterized in that: linkage section (5-2) periphery of described screw mandrel (5) is provided with helical teeth or annular knurl, and the attachment hole of worm gear (12) is bonded on the linkage section (5-2) of screw mandrel (5).
5. according to one of claim 1 or 3 or 4 described electric pushrod, it is characterized in that: the length of described worm gear (12) attachment hole is greater than the length of worm gear Surface of action, and the sidepiece of worm gear (12) also is provided with support muscle (12-2) or/and ring set (12-1).
6. electric pushrod according to claim 1, it is characterized in that: also have outer sleeve (4), outer sleeve (4) is installed on the case lid (8), one end of outer sleeve (4) withstands on the bearing ring (9), the other end of outer sleeve (4) is equipped with guide sleeve (2), inner sleeve (6) is bearing in guide sleeve (2) endoporus place, and the inwall of outer sleeve (4) is provided with the spacing muscle (4-1) that prevents nut (7) rotation.
7. electric pushrod according to claim 6 is characterized in that: the sensitive switch (3) of control screw mandrel stroke is installed in the described outer sleeve (4) and connects lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100188886A CN101220854B (en) | 2008-01-24 | 2008-01-24 | Motor push rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100188886A CN101220854B (en) | 2008-01-24 | 2008-01-24 | Motor push rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101220854A CN101220854A (en) | 2008-07-16 |
| CN101220854B true CN101220854B (en) | 2010-06-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100188886A Expired - Fee Related CN101220854B (en) | 2008-01-24 | 2008-01-24 | Motor push rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101220854B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104422010B (en) * | 2013-09-11 | 2017-10-24 | 福州斯狄渢电热水器有限公司 | Solar space heating facility |
| CN104568575B (en) * | 2015-01-12 | 2017-02-22 | 哈尔滨工程大学 | Force-applying push rod device and multi-axial load loading machine |
| CN104828757B (en) * | 2015-05-20 | 2018-07-13 | 浙江捷昌线性驱动科技股份有限公司 | A kind of manually, electrically dual-purpose type push rod |
| JP6370746B2 (en) * | 2015-07-01 | 2018-08-08 | 株式会社椿本チエイン | Linear actuator |
| CN105020216B (en) * | 2015-07-06 | 2017-05-10 | 中国电子科技集团公司第二十研究所 | Manual/automatic integrated locking device |
| CN105119419A (en) * | 2015-09-25 | 2015-12-02 | 北京万阳天力新能源科技有限公司 | Open type electric push rod |
| CN106253568B (en) * | 2016-08-25 | 2018-05-22 | 浙江联宜电机有限公司 | Electric pushrod |
| CN110451421A (en) * | 2019-09-19 | 2019-11-15 | 中国重汽集团柳州运力科迪亚克机械有限责任公司 | Hand retracting cylinder |
| CN111835137B (en) * | 2020-07-20 | 2023-06-20 | 浙江联宜电机有限公司 | Electric push rod |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1049179A (en) * | 1964-11-04 | 1966-11-23 | British Aircraft Corp Ltd | Improvements in recirculating ball screw-and-nut assemblies and linear actuators incorporating such assemblies |
| US5765668A (en) * | 1993-10-15 | 1998-06-16 | Skf Specialty Products Ab | Fall protection device for actuators |
| CN1468350A (en) * | 2000-10-03 | 2004-01-14 | ���ɿ�������˾ | A linear actuator |
| CN2651519Y (en) * | 2003-05-21 | 2004-10-27 | 程卫东 | Electric push rod of worm-gear pair |
| CN2672374Y (en) * | 2003-12-24 | 2005-01-19 | 加维股份有限公司 | Linear driving mechanism |
| JP3800719B2 (en) * | 1997-05-06 | 2006-07-26 | 日本精工株式会社 | Electric linear actuator |
| CN2852423Y (en) * | 2005-10-28 | 2006-12-27 | 模帝科股份有限公司 | Improved structure of satellite antenna rotary stand electric pull-rod |
| CN1898484A (en) * | 2003-12-24 | 2007-01-17 | 株式会社美姿把 | Linear actuator |
| CN201150020Y (en) * | 2008-01-24 | 2008-11-12 | 李芬 | Electric push rod |
-
2008
- 2008-01-24 CN CN2008100188886A patent/CN101220854B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1049179A (en) * | 1964-11-04 | 1966-11-23 | British Aircraft Corp Ltd | Improvements in recirculating ball screw-and-nut assemblies and linear actuators incorporating such assemblies |
| US5765668A (en) * | 1993-10-15 | 1998-06-16 | Skf Specialty Products Ab | Fall protection device for actuators |
| JP3800719B2 (en) * | 1997-05-06 | 2006-07-26 | 日本精工株式会社 | Electric linear actuator |
| CN1468350A (en) * | 2000-10-03 | 2004-01-14 | ���ɿ�������˾ | A linear actuator |
| CN2651519Y (en) * | 2003-05-21 | 2004-10-27 | 程卫东 | Electric push rod of worm-gear pair |
| CN2672374Y (en) * | 2003-12-24 | 2005-01-19 | 加维股份有限公司 | Linear driving mechanism |
| CN1898484A (en) * | 2003-12-24 | 2007-01-17 | 株式会社美姿把 | Linear actuator |
| CN2852423Y (en) * | 2005-10-28 | 2006-12-27 | 模帝科股份有限公司 | Improved structure of satellite antenna rotary stand electric pull-rod |
| CN201150020Y (en) * | 2008-01-24 | 2008-11-12 | 李芬 | Electric push rod |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101220854A (en) | 2008-07-16 |
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Granted publication date: 20100630 Termination date: 20160124 |
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