CN2769580Y - Rack and pinion hydraulic cylinder - Google Patents
Rack and pinion hydraulic cylinder Download PDFInfo
- Publication number
- CN2769580Y CN2769580Y CN 200520055246 CN200520055246U CN2769580Y CN 2769580 Y CN2769580 Y CN 2769580Y CN 200520055246 CN200520055246 CN 200520055246 CN 200520055246 U CN200520055246 U CN 200520055246U CN 2769580 Y CN2769580 Y CN 2769580Y
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- cylinder
- cylinder barrel
- gear
- oil
- tooth bar
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Abstract
The utility model relates to a gear and rack hydraulic cylinder, which is provided with a cylinder barrel, pistons, a gear and racks, wherein the pistons are positioned at both ends of the racks and are connected with the racks; the racks and the pistons are positioned in the cylinder barrel; the gear and the racks are matched, and the pistons are matched with the cylinder barrel. The cylinder barrel is divided into a left and a right sections, and guide sleeves are arranged between the two sections of cylinder barrels and at the back parts of the racks. Box bodies are arranged at the middle part of the cylinder barrel and at the outer side of the gear. The box bodies are provided with oil cylinder through holes, the guide sleeves and partial cylinder barrel are positioned in the oil cylinder through holes, and the outer wall of partial cylinder barrel are formed into a tight fit with the oil cylinder through holes. The inner wall of one side of each guide sleeve is in contact with the racks, the other sides of the guide sleeves and the middle parts of the box bodies are provided with gaps, and the external diameter of each gap is greater than the external diameter of the gear. The guide sleeves are nonrigid soft supports, and the inner walls of the guide sleeves are provided with oil tanks. The racks and the pistons are formed into flexible connection, and both sides of a gear shaft and both sides of the gear are symmetrically provided with the two racks and the cylinder barrel. The cylinder barrel is not directly stressed with the side force, and is not easy to deform, and the friction of single side between the pistons and the cylinder barrel can not b generated. The hydraulic cylinder has the characteristics of long service life, low cost, good manufacturability, etc.
Description
Affiliated technical field
The utility model relates to the gear rack oil hydraulic cylinder.
Background technique
At present, the cylinder barrel of the gear rack transmission type hydraulic cylinder pressure that occurs on the market generally has two kinds: a kind of is that the tooth bar back does not have supporting, and cylinder barrel also is a solid-end cylinder made in one piece.The oil hydraulic cylinder of this structure in when work since the additional lateral force of the generation between wheel and rack fully by bearing with rigidly connected piston of tooth bar and cylinder barrel, cause the cylinder barrel distortion easily, and because tooth bar can be to the piston power transmission, cause one side friction aggravation of piston and cylinder barrel spare, make piston or cylinder barrel premature failure.The additional lateral force that how to overcome the generation of gear rack transmission type hydraulic cylinder pressure causes distortion and monolateral friction problem, is the difficult problem in face of the those skilled in the art always.Also there is the people to increase casing and fixes, reduce distortion, still, still can't overcome because the active force between wheel and rack causes the problem of piston or the monolateral friction of oil hydraulic cylinder in the simplified periphery of cylinder.For overcoming additional lateral force, also there is the people to support at tooth bar back stiffened, it is the guide pin bushing of rigidity, generally there is curvature of the spinal column groove at the back of guide pin bushing, by the outside additional lateral force that produces when high pressure oil is eliminated wheel and rack work of beating of casing, but the desired machining accuracy of this design is very high, is difficult to reach.Cooperate because piston and cylinder barrel, cylinder barrel and casing, piston and tooth bar, tooth bar all have with casing, these four cooperations will reach coaxial, are difficult to accomplish the too poor purpose that eliminates stress that do not reach again of coaxality.In addition, because the tooth bar back is hard supporting,, generally be to adopt high-abrasive material, but the high-abrasive material price is relatively expensive in order to improve its wear resistance, or the heat treatment that village's material is improved the strength of materials and wear resistance, but complex process, cost is not low yet.And hard supporting also very easily destroys cylinder barrel with the impurity that tooth bar friction scraping produces.
Summary of the invention
For overcoming the prior art deficiency, the technical problems to be solved in the utility model provides a kind of cylinder barrel segmentation combination, cylinder barrel does not directly bear active force, long gear rack oil hydraulic cylinder of life-span between wheel and rack, this gear rack oil hydraulic cylinder manufacturing process is simpler, be not easy distortion, also can not make monolateral friction between piston and cylinder barrel because of the active force between gear and tooth bar.
The technical solution adopted in the utility model is: a kind of gear rack oil hydraulic cylinder, cylinder barrel, piston, gear and tooth bar are set, piston is positioned at the tooth bar two ends and is connected with tooth bar, tooth bar and piston are arranged in cylinder barrel, piston cooperates with cylinder barrel, Gear center place sprocket drive spindle, wheel and rack cooperates, and piston cooperates with cylinder barrel.About described cylinder barrel is divided into two sections, between two sections cylinder barrels and the back of tooth bar is provided with guide pin bushing, outer installment casing at cylinder barrel middle part and gear, the oil cylinder through hole is set on the casing, guide pin bushing and part cylinder barrel are arranged in this oil cylinder through hole and its outer wall and oil cylinder through hole drive fit, and two sections cylinder barrels are integral by casing is fixedly connected.Gear shaft is fixed by casing, has key to fix between gear and gear shaft.Guide pin bushing inwall on one side contacts with tooth bar, and the middle part of guide pin bushing another side and casing is jagged, and breach is greater than the external diameter of gear, and this breach can be the cylindrical hole consistent with the gear shaft center.There is certain clearance between tooth bar and cylinder barrel, not directly contact.
Active force when further reducing because of gear movement impacts, and aforesaid guide pin bushing can be nonrigid soft underprop, can be made by modified formaldehyde or phenolic resin.The inwall of guide pin bushing is provided with the oil groove of intersection, places lubricant oil in the oil groove, but lubricate.The oil cylinder through-hole wall of guide pin bushing outer wall and casing can be bonding by mighty bonds such as hot safe glue, and the end face of guide pin bushing also can have screw and casing to fix.The internal diameter of guide pin bushing is slightly less than the internal diameter of cylinder barrel.For flexibly connecting, between the end axle at tooth bar two ends and the attachment hole of piston certain interval is arranged between described tooth bar and the piston, between tooth bar end axle and the piston steel ball of connection or thimble fastening are arranged.Can have multiplely about this mode that flexibly connects, wherein the applicant also is called in name in the patent application of " flexible plunger " detailed description.This technology capability that has greatly improved piston, cylinder barrel and tooth bar that flexibly connects, manufacture cost is lower.
Be symmetrical arranged two tooth bars and cylinder barrel on the both sides of gear shaft and gear, two tooth bars are vertical with gear shaft with the cylinder barrel direction, and two tooth bars lay respectively at gear upper and lower and and gear engagement.Between two guide pin bushings that two tooth bars are outer and gear three roughly in line.
The two ends of described cylinder barrel are provided with cylinder bottom, and cylinder bottom and cylinder barrel are sealedly and fixedly connected; Described casing is divided into left and right two-part, and two-part are fixedly connected by fastening piece.
This oil hydraulic cylinder is provided with valve piece and oil pipe, and the valve piece is fixed in a casing top or a side, and oil pipe one end is communicated with cylinder barrel, and the oil pipe the other end is communicated with the valve piece.The valve piece is connected with hydraulic control system.Hydraulic control system section adopts existing hydraulic control system, and the utility model no longer describes in detail.
Between described gear shaft two ends and the casing bearing and oil sealing can be set directly; Indentation, there is provided with gland before and after the perhaps described casing, and gland is fixedlyed connected by fastening piece with casing, between gland and the gear shaft two ends bearing and oil sealing is set.
Cross section, described tooth bar back can be circular-arc, and this circular arc size is consistent with the inwall circular arc of guide pin bushing.
The beneficial effects of the utility model are: guide pin bushing has been adopted at the tooth bar back, adopt between piston and the tooth bar and flexibly connect, when middle guide pin bushing by casing and tooth bar back directly bears and work from wheel and rack generation the side direction additional force, this oil hydraulic cylinder is not easy distortion, and owing to the side direction active force of gear mesh tooth bar is no longer passed on the piston by tooth bar, can not cause the monolateral friction between piston and cylinder barrel, increase the working life of oil hydraulic cylinder greatly.And, the soft underprop guide pin bushing at tooth bar back, easy to manufacture, low price, guidance quality and wear resistance are good, and its fricative impurity can not destroy cylinder barrel yet.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the plan view of a kind of structure of the utility model.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the enlarged diagram of guide pin bushing structure among Fig. 1.
Fig. 4 is the enlarged diagram of Fig. 1 middle rack and piston linkage structure.
Among the figure, 1. oil pipe, 2. casing, 3. valve piece, 4. guide pin bushing, 5. gear, 6. flange, 7. tooth bar, 8. piston, 9. cylinder barrel, 10. cylinder bottom, 11. glands, 12. bearings, 13. oil sealings, 14. oil grooves, 15. gear shafts, 16. breach, 21. steel balls, 22. springs, 23. spring plugs.
Embodiment
As shown in Figure 1 and Figure 2, a kind of gear rack oil hydraulic cylinder is provided with cylinder barrel (9), piston (8), gear (5) and tooth bar (7).Piston (8) is positioned at tooth bar (7) two ends and is connected with tooth bar (7), between tooth bar (7) and the piston (8) for flexibly connecting, as shown in Figure 4, between the end axle at tooth bar (7) two ends and the attachment hole of piston (8) certain interval is arranged, by being connected steel ball (21) connection, steel ball (21) is withstood by spring (22) and spring plug (23) between tooth bar (7) end axle and the piston (8).Tooth bar (7) and piston (8) are arranged in cylinder barrel (9), and piston (8) cooperates with cylinder barrel (9), gear (5) center sprocket drive spindle (15), and gear (5) cooperates with tooth bar (7), and piston (8) cooperates with cylinder barrel (9).About described cylinder barrel (9) is divided into two sections, guide pin bushing (4) is set between two sections cylinder barrels (9), outer installment casing (2) at cylinder barrel (9) middle part and gear (5), casing is provided with the oil cylinder through hole on (2), guide pin bushing (4) and part cylinder barrel (9) are arranged in this oil cylinder through hole and its outer wall and oil cylinder through hole drive fit, two sections cylinder barrels (9) are by fixedly connected being integral of casing (2), and cylinder barrel (9) also is provided with flange (6) with the joint of casing (2).Guide pin bushing (4) is nonrigid soft underprop, can be made by modified formaldehyde or phenolic resin; The inwall of guide pin bushing (4) is provided with the oil groove of intersection; The oil cylinder through-hole wall of guide pin bushing (4) outer wall and casing (2) is by safe gluing the connecing of heat.The internal diameter of guide pin bushing (4) is less than the internal diameter of cylinder barrel (9).Gear shaft (15) is fixing by casing (2), has key to fix between gear (5) and gear shaft (15).Tooth bar (7) cross section, back is circular-arc, and this circular arc size is consistent with the inwall circular arc of guide pin bushing (4).Guide pin bushing (4) inwall on one side contacts with tooth bar (7), there is circular arc cutaway (16) at the middle part of guide pin bushing (4) another side and casing (2), as shown in Figure 3, breach (16) is greater than the external diameter of gear (5), this breach (16) is and the consistent cylindrical hole in gear shaft (15) center, guide pin bushing (4) inwall is provided with 5 oil grooves (14), and oil groove (14) has been placed the lubricated lubricant oil of doing.There is certain clearance between tooth bar (7) and cylinder barrel (9), not directly contact.Be symmetrical arranged two tooth bars (7) and cylinder barrel (9) on the both sides of gear shaft (15) and gear (5), two tooth bars (7) are vertical with gear shaft (15) with cylinder barrel (9) direction, and two tooth bars (7) lay respectively at gear (5) upper and lower and mesh with gear (5).Between two guide pin bushings (4) that two tooth bars (7) are outer and gear (5) three roughly in line.The two ends of cylinder barrel (9) are provided with cylinder bottom (10), and cylinder bottom (10) is sealedly and fixedly connected with cylinder barrel (9); Described casing (2) is divided into left and right two-part, and two-part are fixedly connected by fastening piece.Indentation, there is provided with gland (11) before and after the casing (2), and gland (11) is fixedlyed connected by fastening piece with casing (2), between gland (11) and gear shaft (15) two ends bearing (12) and oil sealing (13) is set.This oil hydraulic cylinder is provided with valve piece (3) and oil pipe (1), and oil pipe (1) one end is communicated with cylinder barrel (9), and oil pipe (1) the other end is communicated with valve piece (3).
Claims (10)
1, a kind of gear rack oil hydraulic cylinder is provided with cylinder barrel, piston, gear and tooth bar, and piston is positioned at the tooth bar two ends and is connected with tooth bar, and tooth bar and piston are arranged in cylinder barrel, and wheel and rack cooperates, the center sprocket drive spindle of gear, and piston cooperates with cylinder barrel; It is characterized in that: about described cylinder barrel is divided into two sections, between two sections cylinder barrels guide pin bushing is set, outer installment casing at cylinder barrel middle part and gear is provided with the oil cylinder through hole on the casing, guide pin bushing and part cylinder barrel are arranged in this oil cylinder through hole and its outer wall and oil cylinder through hole drive fit; Guide pin bushing inwall on one side contacts with tooth bar, and the middle part of guide pin bushing another side and casing is jagged, and breach is greater than the external diameter of gear.
2, the described gear rack oil hydraulic cylinder of claim 1, it is characterized in that: described guide pin bushing is nonrigid soft underprop, and the oil cylinder through-hole wall of guide pin bushing outer wall and casing is bonding, and the inwall of guide pin bushing is provided with oil groove.
3, the described gear rack oil hydraulic cylinder of claim 1, it is characterized in that: between described tooth bar and the piston for flexibly connecting, between the end axle at tooth bar two ends and the attachment hole of piston certain interval is arranged, between tooth bar end axle and the piston steel ball of connection or thimble fastening are arranged.
4, the described gear rack oil hydraulic cylinder of claim 1 is characterized in that: be symmetrical arranged two tooth bars and cylinder barrel on the both sides of gear shaft and gear.
5, the described gear rack oil hydraulic cylinder of claim 1, it is characterized in that: the two ends of described cylinder barrel are provided with cylinder bottom, and cylinder bottom and cylinder barrel are sealedly and fixedly connected; Described casing is divided into left and right two-part, and two-part are fixedly connected by fastening piece.
6, the described gear rack oil hydraulic cylinder of claim 1, it is characterized in that: this oil hydraulic cylinder is provided with valve piece and oil pipe, and oil pipe one end is communicated with cylinder barrel, and the oil pipe the other end is communicated with the valve piece.
7, the described gear rack oil hydraulic cylinder of claim 1 is characterized in that: bearing and oil sealing are set between described gear shaft two ends and the casing.
8, the described gear rack oil hydraulic cylinder of claim 1 is characterized in that: indentation, there is provided with gland before and after the described casing, between gland and the gear shaft two ends bearing and oil sealing is set.
9, the described gear rack oil hydraulic cylinder of claim 1, it is characterized in that: cross section, described tooth bar back is circular-arc, this circular arc size is consistent with the inwall circular arc of guide pin bushing.
10, claim 1 or 2 described gear rack oil hydraulic cylinders, it is characterized in that: the internal diameter of described guide pin bushing is less than the internal diameter of cylinder barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520055246 CN2769580Y (en) | 2005-03-04 | 2005-03-04 | Rack and pinion hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520055246 CN2769580Y (en) | 2005-03-04 | 2005-03-04 | Rack and pinion hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2769580Y true CN2769580Y (en) | 2006-04-05 |
Family
ID=36690662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520055246 Expired - Fee Related CN2769580Y (en) | 2005-03-04 | 2005-03-04 | Rack and pinion hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2769580Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500816A (en) * | 2011-11-01 | 2012-06-20 | 东莞市亚峰五金机械有限公司 | Special-shaped edge trimmer |
| CN102536956A (en) * | 2012-02-16 | 2012-07-04 | 长治清华机械厂 | Rotary oil cylinder for lorry-mounted crane |
| CN102619951A (en) * | 2012-04-13 | 2012-08-01 | 长治市永华机械有限公司 | Hydraulic gear rotating device |
| CN103452951A (en) * | 2013-09-26 | 2013-12-18 | 武汉科技大学 | Pendulum-lever type self-servo hydraulic cylinder |
| CN103671352A (en) * | 2013-11-29 | 2014-03-26 | 安徽凯信机电科技有限公司 | Rack hydraulic cylinder |
| CN103953596A (en) * | 2014-05-14 | 2014-07-30 | 南通永创航海机械有限公司 | Hydraulic driving device |
| CN106678432A (en) * | 2016-12-16 | 2017-05-17 | 重庆市巴山液压附件厂有限公司 | Hydraulic gear and rack oil cylinder for pipeline valve opening and closing |
| CN107387479A (en) * | 2017-08-09 | 2017-11-24 | 湘潭大学 | A kind of novel bidentate bar gear liquid cylinder pressure |
| CN108674111A (en) * | 2018-03-23 | 2018-10-19 | 中国北方车辆研究所 | A kind of pinion and-rack rocker arm suspension |
| US11518131B2 (en) | 2017-08-30 | 2022-12-06 | Hefei University Of Technology | Press machine execution system |
-
2005
- 2005-03-04 CN CN 200520055246 patent/CN2769580Y/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500816A (en) * | 2011-11-01 | 2012-06-20 | 东莞市亚峰五金机械有限公司 | Special-shaped edge trimmer |
| CN102536956A (en) * | 2012-02-16 | 2012-07-04 | 长治清华机械厂 | Rotary oil cylinder for lorry-mounted crane |
| CN102619951B (en) * | 2012-04-13 | 2015-10-28 | 长治市永华机械有限公司 | Hydraulic toothed wheel whirligig |
| CN102619951A (en) * | 2012-04-13 | 2012-08-01 | 长治市永华机械有限公司 | Hydraulic gear rotating device |
| CN103452951A (en) * | 2013-09-26 | 2013-12-18 | 武汉科技大学 | Pendulum-lever type self-servo hydraulic cylinder |
| CN103452951B (en) * | 2013-09-26 | 2016-05-25 | 武汉科技大学 | A kind of oscillating rod type is from servo hydraulic cylinder |
| CN103671352A (en) * | 2013-11-29 | 2014-03-26 | 安徽凯信机电科技有限公司 | Rack hydraulic cylinder |
| CN103953596A (en) * | 2014-05-14 | 2014-07-30 | 南通永创航海机械有限公司 | Hydraulic driving device |
| CN103953596B (en) * | 2014-05-14 | 2016-03-23 | 南通永创航海机械有限公司 | A kind of fluid pressure drive device |
| CN106678432A (en) * | 2016-12-16 | 2017-05-17 | 重庆市巴山液压附件厂有限公司 | Hydraulic gear and rack oil cylinder for pipeline valve opening and closing |
| CN107387479A (en) * | 2017-08-09 | 2017-11-24 | 湘潭大学 | A kind of novel bidentate bar gear liquid cylinder pressure |
| US11518131B2 (en) | 2017-08-30 | 2022-12-06 | Hefei University Of Technology | Press machine execution system |
| DE112018001931B4 (en) | 2017-08-30 | 2023-05-25 | Hefei University Of Technology | Press, press system and associated method |
| CN108674111A (en) * | 2018-03-23 | 2018-10-19 | 中国北方车辆研究所 | A kind of pinion and-rack rocker arm suspension |
| CN108674111B (en) * | 2018-03-23 | 2022-03-18 | 中国北方车辆研究所 | Rack and pinion formula rocking arm suspension |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |