CN203730735U - Hydraulic three-position reversing mechanism - Google Patents
Hydraulic three-position reversing mechanism Download PDFInfo
- Publication number
- CN203730735U CN203730735U CN201320713840.3U CN201320713840U CN203730735U CN 203730735 U CN203730735 U CN 203730735U CN 201320713840 U CN201320713840 U CN 201320713840U CN 203730735 U CN203730735 U CN 203730735U
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- spool
- valve rod
- gland
- spring
- left end
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Abstract
The utility model relates to a hydraulic reversing mechanism, and provides a hydraulic three-position reversing mechanism in order to solve the problem that an existing connecting rod reversing mechanism is complicated in structure and easy to wear. The hydraulic three-position reversing mechanism comprises a cylindrical shell and a shell gland fixed connected with the right end of the cylindrical shell, a cylindrical spool is arranged in the shell in a sliding manner, a valve rod is arranged in the spool in a sliding manner, a valve rod spring sleeves the left section of the valve rod, the left end of the valve rod spring is in contact connection with the valve spool while the right end of the same is in contact connection with the valve rod, a spool gland is arranged at the right end of the spool, a spool spring is arranged between the right end of the spool and the shell gland, a first oil cavity is arranged between the valve spool and the shell and communicated with a PA oil port, a second oil cavity is arranged between the spool and the valve rod and communicated with a PB oil port, and the tip of the left end of the valve rod is a connection portion extending to the outside of the shell. The hydraulic three-position reversing mechanism adopts hydraulic drive, spring return and mechanical limit, is matched with a hydraulic or electronic control device in use, is directly mounted in a speed change valve, needs not to be adjusted, is not easy to wear, and has the advantages of simple structure, reliable performance and the like.
Description
Technical field
The utility model relates to a kind of changement, relates in particular to three changements of a kind of hydraulic pressure.
Background technique
The gear actuator of existing transmission for engineering machinery is generally rigid connecting linkage, for example on bulldozer, use three changements, the transmission " node " of such changement is many, the operating space of reversing handle is larger, articulation mechanism is many, thereby causes equipment adjustment difficulty large, and transmission efficiency is lower, " weight " of commutation, the frequent commutation in operation easily cause operator anxiety and fatigue.The changement of this linkage mechanism uses in the severe machinery of working condition in addition, the wear extent of linkage mechanism joint shaft bearing is large, when adjusting not in time or safeguarding time not in place, the commutation that happens occasionally is not in place, causes working life of speed changer to decline rapidly or the fault such as damage.
Model utility content
The technical problems to be solved in the utility model is the above-mentioned shortcoming for existing changement, proposes a kind of simple in structure, three changements of hydraulic pressure that reliability is high.
Technical solution adopted in the utility model is three changements of a kind of hydraulic pressure of structure, the shell gland that it comprises the frame of tubular and is fixedly connected with at frame right-hand member, between frame and shell gland, be connected with bolt, the sliding spool of establishing tubular in frame, the sliding valve rod of establishing in spool, left section of valve rod is set with to valve rod the valve rod spring of elastic force is to the right provided, left section of valve rod and valve core cavity sidewall left section is all stepped, left section at valve rod is arranged with valve rod spring, the left end of valve rod spring contacts with the ladder of valve core cavity sidewall, the right-hand member of valve rod spring contacts with the ladder of left section of valve rod, , , spool gland is fixedly mounted on the right-hand member of spool by spool gland construction bolt, , between spool and spool gland, be connected with bolt, seal with O ring, the left end of the right-hand member of spool and shell gland is provided with valve core spring, valve core spring provides elastic force left to spool, between spool and frame, be provided with and promote the first oil pocket that spool moves right, between valve rod and spool gland, form and promote the second oil pocket that valve rod is moved to the left, two oil pockets respectively with the PA hydraulic fluid port being arranged on frame, PB hydraulic fluid port is communicated with, the termination of valve rod left end is the joint that extends frame outside, the left end of spool is provided with the window stretching out for joint.In the utility model changement, joint is connected with the spool of selector valve, when PA hydraulic fluid port, PB hydraulic fluid port are all when not oil-feed, spool under the effect of valve core spring in ultra-Left end, valve rod under the effect of valve rod spring in ultra-Right end, now can be corresponding with of a selector valve gear fixed position, when the oil-feed of PB hydraulic fluid port and when the not oil-feed of PA hydraulic fluid port, spool is still in ultra-Left end, but the second oil pocket promotes valve rod to be moved to the left, and makes valve rod pull the spool of selector valve to be also moved to the left and in gear fixed position corresponding to another one; In the time that the oil-filled and PB hydraulic fluid port of PA hydraulic fluid port is not oil-filled, valve rod under the effect of valve rod spring in ultra-Right end, the first oil pocket promotes spool and moves right, make spool pull valve rod, valve rod to pull the spool of selector valve also to move right and in gear fixed position corresponding to another one, thus realize advance, retreat, the commutation fixed position of neutral gear three gears.
In three changements of the utility model hydraulic pressure, the oil circuit that connects the second oil pocket and PB hydraulic fluid port comprises the annular oil groove and the radial direction oil hole that are arranged on spool, and radial direction oil hole is communicated with the second oil pocket and annular oil groove, and annular oil groove is communicated with PB hydraulic fluid port.
In three changements of the utility model hydraulic pressure, the left end of frame inner chamber is provided with the left limit step to spool left end stroke limit.The left end of same shell gland is provided with the right limit end face to spool gland right-hand member stroke limit.Can realize accurate location by left and right limited step or end face.
In three changements of the utility model hydraulic pressure, the left end of valve core cavity is provided with the left limit step to valve rod left end stroke limit.The left end of same spool gland is provided with the right limit end face to valve rod right-hand member stroke limit.Can realize accurate location by left and right limited step or end face.
In three changements of the utility model hydraulic pressure, left section of left section of valve rod and valve core cavity sidewall are equipped with step, valve rod spring housing is located at left section of valve rod, and the left end of valve rod spring is connected with the step contact of valve core cavity sidewall, and the right-hand member of valve rod spring is connected with the step contact of left section of valve rod.Right section of outer side surface of spool is provided with step, and valve core spring is set in right section of spool, and the left end of valve core spring is connected with the step contact of spool outer side surface, and the right-hand member of valve core spring is connected with the left side contact of shell gland.Left section of spool is provided with valve rod spring chamber resettling and the outside ventilating slit being communicated with, shell gland is provided with valve core spring chamber resettling and the outside ventilating slit that is communicated with, avoid spool and valve rod to move left and right in the cavity at two ends, Shi Qi left and right and occur high pressure or negative pressure, affect the movement of spool and valve rod.
Three changements of the utility model hydraulic pressure compared with prior art, adopt hydraulic driving, spring return function and mechanical position limitation, and itself and hydraulic pressure, or/and electric controller is used in conjunction with, are directly installed in speed change valve, do not need to adjust, not easy to wear.Simple in structure, with low cost, operate light, reliable performance, the advantage such as multiple functional.
Brief description of the drawings
Fig. 1 is the projection drawing of three changement right sides of the utility model hydraulic pressure;
Fig. 2 be in Fig. 1 A-A to cross section view;
Fig. 3 be in Fig. 2 B-B to cross section view.
Reference character:
1-shell gland construction bolt, 2-frame, 3-spool, 4-valve rod, 5-valve rod spring, 6-spool gland, 7-seal ring, 8-shell gland, 9-valve core spring, 10-vent, 11-the first oil pocket, 12-the second oil pocket, 13-radial direction oil hole, 14-annular oil groove, 15-spool left end limited step, 16-valve rod left end limited step, 17-spool gland construction bolt.
Embodiment
Below in conjunction with brief description of the drawings specific embodiments.
As shown in Figure 1 to Figure 3, in three changements of hydraulic pressure in the present embodiment, shell gland 8 is fixedly connected with shell gland construction bolt 1 at the right-hand member of the frame 2 of tubular, in frame 2, be slidably equipped with the spool 3 of tubular, right section of outer side surface of spool 3 is stepped, and be arranged with herein the valve core spring 9 of reset use, the left end of valve core spring 9 contacts with the step on spool 3, right-hand member contacts with the left end of shell gland 8, inner chamber cunning at spool 3 is established valve rod 4, valve rod 4 left ends are joint, this joint extend out to the outside of frame 2, for being connected with the spool of selector valve.Left section of valve rod 4 and spool 3 intracavity sidewalls left section is all stepped, is arranged with valve rod spring 5 left section of valve rod 4, and the left end of valve rod spring 5 contacts with the ladder of spool 3 intracavity sidewalls, and the right-hand member of valve rod spring contacts with the ladder of left section of valve rod 4.Spool gland 6 is fixedly mounted on the right-hand member of spool 3 by spool gland construction bolt 17, between valve rod 4 and spool gland 6, form the second oil pocket 12, on the outer side surface of spool 3, be provided with annular oil groove 14, in spool 3, be provided with radial direction oil hole 13 and be communicated with the second oil pocket 12 and annular oil groove 14, annular oil groove 14 is communicated with the PB mouth on frame 2.In order to prevent occurring high pressure or negative pressure in the chamber resettling of valve rod spring and valve core spring, be provided with ventilative hole by the chamber resettling of valve rod spring and exterior at the left end of spool 3, shell gland 8 is provided with vent 10 by the chamber resettling of valve core spring and exterior.
Between frame 2 intracavity sidewalls and spool 3 outer side walls, be provided with the first oil pocket 11, the first oil pocket 11 is communicated with the PA hydraulic fluid port on frame 2, for accurate location, between left section of outer side surface of spool 3 and left section of inner side surface of inner chamber of frame 2, be provided with the spool left end limited step 15 being in contact with one another for to spool 3 left end stroke limits, spacing to spool 3 right-hand member strokes contacts at shell gland 8 left side walls.Between left section of sidewall of spool 3 inner chambers and left section of outer side wall of valve rod 4, be provided with the valve rod left end limited step 16 to valve rod 4 left end stroke limits, spacing to valve rod 4 right-hand member stroke contacts at spool gland 6 left surfaces.In three changements of hydraulic pressure in the present embodiment, joint is connected with the spool of selector valve, in the time that PA hydraulic fluid port, PB hydraulic fluid port are all not oil-filled, spool 3 under the elastic force of valve core spring 9 and spool left end limited step 15 position-limiting actions in ultra-Left end, valve rod 4 under valve rod spring 5 elastic force and spool gland 6 position-limiting actions in ultra-Right end, now can be corresponding with first gear fixed position of selector valve; In the time of the oil-filled and not oil-feed of PA hydraulic fluid port of PB hydraulic fluid port, spool 3 is still in ultra-Left end, but the second oil pocket 12 promotes that valve rod 4 is moved to the left until valve rod left end limited step 16 is spacing, valve rod 4 moves and pulls the spool of selector valve to be also moved to the left and in second gear fixed position; In the time that the oil-filled and PB hydraulic fluid port of PA hydraulic fluid port is not oil-filled, valve rod 4 under the effect of valve rod spring 5 relatively spool in ultra-Right end, the first oil pocket 11 promotes that spool 3 moves right until spool gland 6 contacts spacing with the left end of shell gland 8, spool 3 together with valve rod 4, valve rod 4 pull the spool of selector valve also to move right in the 3rd gear fixed position, changement can realize advance, retreat, the commutation fixed position of three gears of neutral gear.
Claims (9)
1. three changements of a hydraulic pressure, it is characterized in that the shell gland that comprises the frame of tubular and be fixedly connected with at frame right-hand member, the sliding spool of establishing tubular in frame, the sliding valve rod of establishing in spool, left section of valve rod is set with to valve rod the valve rod spring of elastic force is to the right provided, left section of valve rod (4) and spool (3) intracavity sidewall left section is all stepped, left section at valve rod (4) is arranged with valve rod spring (5), the left end of valve rod spring (5) contacts with the ladder of spool (3) intracavity sidewall, the right-hand member of valve rod spring contacts with the ladder of left section of valve rod (4), spool gland (6) is fixedly mounted on the right-hand member of spool (3) by spool gland construction bolt (17), the left end of the right-hand member of spool and shell gland is provided with valve core spring, between spool and frame, be provided with and promote the first oil pocket that spool moves right, the first oil pocket is communicated with the PA hydraulic fluid port being arranged on frame, between valve rod (4) and spool gland (6), form and promote the second oil pocket (12) that valve rod is moved to the left, the second oil pocket is communicated with the PB hydraulic fluid port being arranged on frame through oil circuit, the termination of valve rod left end is the joint that extends frame outside.
2. three changements of hydraulic pressure according to claim 1, it is characterized in that the oil circuit that connects the second oil pocket and PB hydraulic fluid port comprises the annular oil groove and the radial direction oil hole that are arranged on spool, described radial direction oil hole is communicated with described the second oil pocket and annular oil groove, and described oil groove is communicated with described PB hydraulic fluid port.
3. three changements of hydraulic pressure according to claim 1, is characterized in that the left end of described frame inner chamber is provided with the limited step to spool left end stroke limit.
4. three changements of hydraulic pressure according to claim 1, is characterized in that the left end of described shell gland is provided with the spacing end face to spool gland right-hand member stroke limit.
5. three changements of hydraulic pressure according to claim 1, is characterized in that the left end of described spool gland is provided with the spacing end face to valve rod right-hand member stroke limit.
6. three changements of hydraulic pressure according to claim 1, it is characterized in that left section of left section of described valve rod and valve core cavity sidewall is equipped with step, described valve rod spring housing is located at left section of described valve rod, the left end of described valve rod spring is connected with the step contact of valve core cavity sidewall, and the right-hand member of described valve rod spring is connected with the step contact of left section of described valve rod.
7. three changements of hydraulic pressure according to claim 6, is characterized in that left section of described spool is provided with valve rod spring chamber resettling and the outside ventilating slit being communicated with.
8. three changements of hydraulic pressure according to claim 1, it is characterized in that right section of outer side surface of described spool is provided with step, described valve core spring is set in right section of described spool, the left end of described valve core spring is connected with the step contact of spool outer side surface, and the right-hand member of described valve core spring is connected with the left side contact of described shell gland.
9. three changements of hydraulic pressure according to claim 8, is characterized in that described shell gland is provided with the ventilating slit inside and outside being communicated with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320713840.3U CN203730735U (en) | 2013-11-13 | 2013-11-13 | Hydraulic three-position reversing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320713840.3U CN203730735U (en) | 2013-11-13 | 2013-11-13 | Hydraulic three-position reversing mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203730735U true CN203730735U (en) | 2014-07-23 |
Family
ID=51200811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320713840.3U Expired - Fee Related CN203730735U (en) | 2013-11-13 | 2013-11-13 | Hydraulic three-position reversing mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203730735U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105972196A (en) * | 2016-07-19 | 2016-09-28 | 广西正匠农业科技有限公司 | Hydraulic steering variable speed execution mechanism |
| CN106958523A (en) * | 2017-05-20 | 2017-07-18 | 重庆水泵厂有限责任公司 | Membrane pump displacement configuration |
-
2013
- 2013-11-13 CN CN201320713840.3U patent/CN203730735U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105972196A (en) * | 2016-07-19 | 2016-09-28 | 广西正匠农业科技有限公司 | Hydraulic steering variable speed execution mechanism |
| CN106958523A (en) * | 2017-05-20 | 2017-07-18 | 重庆水泵厂有限责任公司 | Membrane pump displacement configuration |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 300300 Tianjin Binhai New Area Airport Economic Zone, No. three road 203. Co-patentee after: GUANGXI LIUGONG MACHINERY Co.,Ltd. Patentee after: TIANJIN LIUGONG MACHINERY Co.,Ltd. Address before: 300300 Tianjin Binhai New Area Airport Economic Zone, No. three road 203. Co-patentee before: GUANGXI LIUGONG MACHINERY Co.,Ltd. Patentee before: TIANJIN LIUGONG MACHINERY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180719 Address after: 213168 588 Yancheng South Road, Wujin hi tech Industrial Development Zone, Changzhou, Jiangsu Co-patentee after: GUANGXI LIUGONG MACHINERY Co.,Ltd. Patentee after: LIUGONG CHANGZHOU MACHINERY Co.,Ltd. Address before: 300300 Tianjin Binhai New Area Airport Economic Zone, No. three road 203. Co-patentee before: GUANGXI LIUGONG MACHINERY Co.,Ltd. Patentee before: TIANJIN LIUGONG MACHINERY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140723 Termination date: 20211113 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |