CN204434219U - Forklift lifting New Buffering oil cylinder - Google Patents
Forklift lifting New Buffering oil cylinder Download PDFInfo
- Publication number
- CN204434219U CN204434219U CN201520121831.4U CN201520121831U CN204434219U CN 204434219 U CN204434219 U CN 204434219U CN 201520121831 U CN201520121831 U CN 201520121831U CN 204434219 U CN204434219 U CN 204434219U
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- China
- Prior art keywords
- piston
- blind hole
- cylinder
- buffer plunger
- piston rod
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of forklift lifting New Buffering oil cylinder, comprise cylinder body and connect firmly the cylinder bottom in cylinder body bottom, reciprocating piston rod is provided with in cylinder body, piston bush is connected on the front end of piston rod, cavity volume between cylinder bottom and piston is rodless cavity, the hydraulic fluid port be located in cylinder bottom is communicated with rodless cavity and outside delivery line, blind hole is provided with in the front end of described piston rod, the buffer plunger that can move back and forth in blind hole of buffering axle sleeve and hollow is provided with in described blind hole, axial cutoff port is provided with on the top of described buffer plunger, the sidepiece of buffer plunger is provided with radial cutoff port, and stage clip is socketed with on buffer plunger.The utility model cushion cylinder, had both ensured pooling feature when oil cylinder declines, had turn eliminated impact when oil cylinder hoists initial, eliminated forklift door frame jitter phenomenon.
Description
Technical field:
The utility model relates to a kind of novel oil cylinder, specifically a kind of forklift lifting New Buffering oil cylinder.
Background technology:
Current Domestic Forklift uses the commonplace cushion cylinder that hoists, its structure as shown in Figure 1, piston rod 2 is provided with in cylinder body 1, piston 3 is connected to the end of piston rod, blind hole 4 is provided with in the end of piston, buffering axle sleeve 5 is located in blind hole, and the oral area of blind hole be provided with back-up ring 6 stop buffering axle sleeve 5 come off, cylinder bottom 7 and cylinder body 1 are welded as a whole, cavity volume between cylinder bottom 7 and piston 3 is rodless cavity 10, cylinder bottom is provided with buffer plunger 8, and buffer plunger is hollow structure up/down perforation, and outlet at bottom is communicated with the hydraulic fluid port 9 of cylinder bottom 7.When oil cylinder declines, when piston run to contact with buffer plunger time, buffer plunger 8 is inserted in blind hole 4, pressure oil in rodless cavity slowly can only be back in hydraulic fluid port 9 by the gap between buffering axle sleeve 5 and buffer plunger 8, due to the throttling action of pressure oil, piston falling speed slows down, and forms the action of giving of oil cylinder.Equally, when oil cylinder hoists, the pressure oil that hydraulic fluid port enters also can only flow to rodless cavity by the gap between buffer plunger and buffering axle sleeve, and initial raising voltage force rate is comparatively large, has influence on the lifting velocity of door frame, also easily causes forklift door frame to shake simultaneously.
Summary of the invention:
For overcoming the defect of prior art, the purpose of this utility model is to provide a kind of forklift lifting New Buffering oil cylinder, has both ensured pooling feature when oil cylinder declines, and has turn eliminated impact when oil cylinder hoists initial, eliminates forklift door frame jitter phenomenon.
The utility model technical solution problem adopts following technical scheme:
Forklift lifting New Buffering oil cylinder, comprise cylinder body and connect firmly the cylinder bottom in cylinder body bottom, reciprocating piston rod is provided with in cylinder body, piston bush is connected on the front end of piston rod, cavity volume between cylinder bottom and piston is rodless cavity, the hydraulic fluid port be located in cylinder bottom is communicated with rodless cavity and outside delivery line, blind hole is provided with in the front end of described piston rod, the buffer plunger that can move back and forth in blind hole of buffering axle sleeve and hollow is provided with in described blind hole, axial cutoff port is provided with on the top of described buffer plunger, the sidepiece of buffer plunger is provided with radial cutoff port, and stage clip is socketed with on buffer plunger.
Described piston has centre hole, the centre hole of piston and the blind hole coaxial line of piston rod, defines step surface between bottom piston center hole upper inside wall and piston rod blind hole inwall, and described buffering axle sleeve is avoided coming off for supporting with described step surface.
Define step surface bottom the inwall of described buffering axle sleeve and between the center bore inner wall top of described piston, the upper end of described stage clip with this step surface for spring perch, the lower end of stage clip with the bottom flanging of described buffering axle sleeve for spring perch.
Between the upper end of described buffering axle sleeve and the blind hole inwall of described piston rod, there is step surface, groove is provided with at the upper end edge circumferencial direction of described buffer plunger, and back-up ring is provided with in groove, described back-up ring avoids buffer plunger to come off from blind hole with the step surface of buffer shaft set upper side for supporting.
Described radial cutoff port is provided with multiple, and multiple radial cutoff port is spaced apart in the axial direction at the sidewall of described buffer plunger, and the aperture of radial cutoff port is from top to bottom in reducing Long-term change trend gradually.
Compared with the prior art, the beneficial effects of the utility model are embodied in:
The utility model by arranging buffer structure on piston rod and piston, when oil cylinder hoists initial, buffer plunger is due to the effect of cutoff port, fundamental sum piston hoists action together, pressure oil just directly can enter oil cylinder rodless cavity without cutoff port, so substantially can not produce fluctuation of pressure when initially hoisting.When oil cylinder declines, first contact cylinder bottom bottom buffer plunger and seal oil outlet loop, the hydraulic fluid port making the pressure oil in rodless cavity slowly can only be flowed to cylinder bottom by cutoff port A3, A4, A5, the A6 on buffer plunger carries out oil return, pressure oil in such rodless cavity just forms the impulsive force that immense pressure opposing descent of piston produces, the speed of descent of piston is slowed down, forms the action of giving of oil cylinder.
Accompanying drawing illustrates:
Fig. 1 is the structural representation (piston rod falling state) of existing cushion cylinder; Fig. 2 is the schematic diagram (piston rod hoist state) of existing cushion cylinder; Fig. 3 is the structural representation (piston rod hoist state) of the utility model cushion cylinder; Fig. 4 is the structural representation (piston rod falling state) of the utility model cushion cylinder.
Number in the figure: 1 cylinder body, 2 piston rods, 3 pistons, 4 blind holes, 5 buffering axle sleeves, 6 back-up rings, 7 cylinder bottoms, 8 buffer plungers, 9 hydraulic fluid ports, 10 rodless cavities, 11 axial cutoff ports, 12 radial cutoff ports, 13 stage clips.
Below by way of detailed description of the invention, and the utility model is described in further detail by reference to the accompanying drawings.
Detailed description of the invention, non-limiting examples is as described below:
Embodiment: composition graphs 3,4, the forklift lifting New Buffering oil cylinder of the present embodiment, it comprises cylinder body 1 and connects firmly the cylinder bottom 7 in cylinder body 1 bottom, reciprocating piston rod 2 is provided with in cylinder body, piston 3 is socketed in the front end of piston rod 2, cavity volume between cylinder bottom 7 and piston 3 is rodless cavity 10, and the hydraulic fluid port 9 be located in cylinder bottom is communicated with rodless cavity and outside delivery line.Blind hole 4 is provided with in the front end of piston rod, the centre hole coaxial line (dead in line) of blind hole 4 and piston 3, the buffer plunger 8 that can move back and forth in blind hole of buffering axle sleeve 5 and hollow is provided with in blind hole, be provided with axial cutoff port 11 on the top of buffer plunger 8, the sidepiece of buffer plunger is provided with radial cutoff port 12.
In specifically arranging, be provided with multi-sealed between piston outer wall and inboard wall of cylinder block, define step surface between bottom piston center hole upper inside wall and piston rod blind hole inwall, the buffering axle sleeve 5 in blind hole is avoided coming off for supporting with this step surface.
Buffer plunger 8 is socketed with stage clip 13, buffering axle sleeve 5 inwall bottom and define step surface between the center bore inner wall top of piston 3, the upper end of stage clip is with this step surface for spring perch, and the lower end of stage clip is to cushion the bottom flanging of axle sleeve for spring perch.So-called flanging, the bottom namely cushioning axle sleeve has outside flanging, just as flange.
Come off from the outlet at bottom of blind hole for avoiding buffer plunger, step surface is provided with between the upper end and the blind hole inwall of piston rod 2 of buffering axle sleeve 5, the upper end edge circumferencial direction of buffer plunger 8 is provided with groove, and in groove, be provided with back-up ring 6, back-up ring 6 for supporting, prevents buffer plunger from departing from from blind hole with the step surface of buffer shaft set upper side.
Shown in Fig. 3, the radial cutoff port 12 of buffer plunger sidepiece is provided with 3-5, and multiple radial cutoff port is spaced apart in the axial direction at the sidewall of buffer plunger 8, and the aperture of radial cutoff port is from top to bottom in reducing Long-term change trend gradually.
In work, shown in Fig. 3, when piston rod initially hoists, hydraulic oil enters in rodless cavity 10 along direction shown in A1, A2 arrow from the hydraulic fluid port 9 of cylinder bottom 7, and hydraulic oil, by piston, piston rod jack-up, realizes oil cylinder and to hoist action, because hydraulic oil directly, successfully can enter in rodless cavity 10 from hydraulic fluid port 9, the pressure that initially hoists is large, and the lifting velocity of door frame is fast, therefore there will not be the phenomenon that forklift door frame is shaken.
Shown in Fig. 4, when forklift door frame falls, i.e. piston, when piston rod declines, due to the pressure effect of hydraulic oil in the reset response of stage clip 13 and blind hole, first the bottom of buffer plunger 8 contacts with cylinder bottom 7, make the hydraulic oil in rodless cavity 10 can not flow directly in the hydraulic fluid port 9 of cylinder bottom, but by the axial cutoff port 11 on buffer plunger 8, radial cutoff port 12 flows in hydraulic fluid port 9, oil return direction is as shown in A3-A6 arrow in Fig. 4, due to the throttling action of cutoff port, huge oil pressure is defined in rodless cavity 10, the impulsive force that impedance piston rod 2 falls, guarantee that piston rod slowly falls, avoid impacting cylinder bottom, also guarantee that forklift door frame does not produce large rocking.Moreover because the aperture of the radial cutoff port 12 on buffer plunger 8 reduces gradually, when piston 3 is more close to cylinder bottom 7, oil return speed is slower, the falling speed of piston rod can be made to present the linear trend reduced, until drop on cylinder bottom light and slowly from top to bottom.
Claims (5)
1. forklift lifting New Buffering oil cylinder, comprise cylinder body (1) and connect firmly the cylinder bottom (7) in cylinder body (1) bottom, reciprocating piston rod (2) is provided with in cylinder body, piston (3) is socketed in the front end of piston rod (2), cavity volume between cylinder bottom (7) and piston (3) is rodless cavity (10), the hydraulic fluid port (9) be located in cylinder bottom is communicated with rodless cavity and outside delivery line, it is characterized in that, blind hole (4) is provided with in the front end of described piston rod, the buffer plunger (8) that can move back and forth in blind hole of buffering axle sleeve (5) and hollow is provided with in described blind hole, axial cutoff port (11) is provided with on the top of described buffer plunger (8), the sidepiece of buffer plunger is provided with radial cutoff port (12), and on buffer plunger, be socketed with stage clip (13).
2. forklift lifting New Buffering oil cylinder according to claim 1, it is characterized in that, described piston (3) has centre hole, the centre hole of piston and the blind hole coaxial line of piston rod, define step surface between bottom piston center hole upper inside wall and piston rod blind hole inwall, described buffering axle sleeve (5) is avoided coming off for supporting with described step surface.
3. forklift lifting New Buffering oil cylinder according to claim 1, it is characterized in that, step surface is defined bottom the inwall of described buffering axle sleeve (5) and between the center bore inner wall top of described piston (3), the upper end of described stage clip with this step surface for spring perch, the lower end of stage clip with the bottom flanging of described buffering axle sleeve for spring perch.
4. forklift lifting New Buffering oil cylinder according to claim 1, it is characterized in that, between the upper end of described buffering axle sleeve (5) and the blind hole inwall of described piston rod (2), there is step surface, groove is provided with at the upper end edge circumferencial direction of described buffer plunger (8), and in groove, being provided with back-up ring (6), described back-up ring (6) avoids buffer plunger to come off from blind hole with the step surface of buffer shaft set upper side for supporting.
5. forklift lifting New Buffering oil cylinder according to claim 1, it is characterized in that, described radial cutoff port (12) is provided with multiple, multiple radial cutoff port is spaced apart in the axial direction at the sidewall of described buffer plunger (8), and the aperture of radial cutoff port is from top to bottom in reducing Long-term change trend gradually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520121831.4U CN204434219U (en) | 2015-03-02 | 2015-03-02 | Forklift lifting New Buffering oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520121831.4U CN204434219U (en) | 2015-03-02 | 2015-03-02 | Forklift lifting New Buffering oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204434219U true CN204434219U (en) | 2015-07-01 |
Family
ID=53602115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520121831.4U Expired - Fee Related CN204434219U (en) | 2015-03-02 | 2015-03-02 | Forklift lifting New Buffering oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204434219U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443491A (en) * | 2015-12-07 | 2016-03-30 | 柳州柳工液压件有限公司 | Forklift lifting oil cylinder |
| US10738802B2 (en) | 2016-06-16 | 2020-08-11 | Qingdao Acme Innovation Technology Co., Ltd. | Hydraulic buffer and cylinder combined with the same |
| US10962221B2 (en) | 2018-11-13 | 2021-03-30 | Pro-Iroda Industries, Inc. | Flame gun with flow control ring |
-
2015
- 2015-03-02 CN CN201520121831.4U patent/CN204434219U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443491A (en) * | 2015-12-07 | 2016-03-30 | 柳州柳工液压件有限公司 | Forklift lifting oil cylinder |
| US10738802B2 (en) | 2016-06-16 | 2020-08-11 | Qingdao Acme Innovation Technology Co., Ltd. | Hydraulic buffer and cylinder combined with the same |
| US10962221B2 (en) | 2018-11-13 | 2021-03-30 | Pro-Iroda Industries, Inc. | Flame gun with flow control ring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150701 Termination date: 20180302 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |