CN202597301U - Engineering mechanism and hydraulic speed regulating system thereof - Google Patents
Engineering mechanism and hydraulic speed regulating system thereof Download PDFInfo
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- CN202597301U CN202597301U CN 201220243877 CN201220243877U CN202597301U CN 202597301 U CN202597301 U CN 202597301U CN 201220243877 CN201220243877 CN 201220243877 CN 201220243877 U CN201220243877 U CN 201220243877U CN 202597301 U CN202597301 U CN 202597301U
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Abstract
The utility model discloses a hydraulic speed regulating system for an engineering mechanism. The hydraulic speed regulating system comprises a plurality of clutches, a control valve (11), a leading oil channel (1) and a main oil channel (2), wherein each clutch is connected in parallel on the main oil channel (2), with an oil inlet connected in series with an on-off valve (23); each on-off valve (23) is connected or disconnected with the main oil channel (2) by switching different working positions; a first control port of the switching valve (23) is communicated with the leading oil channel (1), and a second control port of the switching valve (23) is connected with the control valve (11); and moreover, the control valve (11) is communicated with corresponding switching valve (23) by switching different working positions, and the pressure of the second control port of the communicated switching valve (23) can be changed as well. With adoption of the hydraulic speed regulating system, the engineering mechanism can be controlled to walk through little operating force. The utility model further discloses an engineering mechanism comprising such hydraulic speed regulating system.
Description
Technical field
The utility model relates to technical field of engineering machinery, relates in particular to a kind of hydraulic speed regulation system that is used for engineering machinery.In addition, the utility model also provides a kind of engineering machinery that comprises above-mentioned hydraulic speed regulation system.
Background technique
The walking controlled hydraulic system is the core of bulldozer hydraulic control system, and hydraulic speed regulation system is the key link of walking controlled hydraulic system.
Please refer to Fig. 1, Fig. 1 is for being used for the hydraulic schematic diagram of the hydraulic speed regulation system of engineering machinery in the existing technology.
In the existing technology, as shown in Figure 1 for the fraction horsepower engineering machinery, hydraulic speed regulation system generally includes oil hydraulic pump, the working connection 2 that is connected with the oil hydraulic pump output terminal ', and both direction clutch 21 ' and a plurality of gear clutches.Above-mentioned working connection 2 ' be provided with position control valve 111 ', be used to control working connection 2 ' with forward clutch 211 ', back clutch 212 ' break-make.Above-mentioned working connection 2 ' also be provided with speed control valve 112 ', be used to control working connection 2 ' with one grade of clutch 221 ', second gear clutch 222 ' and third gear clutch 223 ' break-make.
Because the vibration hydraulic system flow of fraction horsepower engineering machinery is less; The common manual manipulation position control valve 111 of operator ' and speed control valve 112 '; Can realize to oil hydraulic pump to speed clutch 22 ' with direction clutch 21 ' break-make control, and then control vehicle to run.
Yet for the high-power engineering machinery, the flow that its vibration hydraulic system needs is bigger; If still adopt the method for above-mentioned manual control, then need very big steering force, and need to increase the diameter of speed change valve spool; So that enough flows to be provided, increased cost of production greatly.
In view of this, demand urgently above-mentioned hydraulic speed regulation system being carried out further optimal design, make it need less steering force can realize walking control, improve the operability and the working stability of hydraulic speed regulation system engineering machinery to above-mentioned technical problem.
The model utility content
The technical problem that the utility model will solve is the hydraulic speed regulation system that is provided for engineering machinery, and it needs less steering force can realize the walking control to engineering machinery, improves its operability and working stability.Another technical problem that the utility model will solve is that a kind of engineering machinery that comprises above-mentioned hydraulic speed regulation system is provided.
For solving the problems of the technologies described above, the utility model provides a kind of hydraulic speed regulation system that is used for engineering machinery, comprises a plurality of clutches and control valve; The fuel feeding road of said hydraulic speed regulation system comprises guide's oil circuit and working connection, and the pressure of said guide's oil circuit is less than the pressure of said working connection;
The equal parallel connection of each said clutch is located on the said working connection, and the filler opening of each said clutch is in series with on-off valve, each on-off valve is switched on or switched off said working connection through switching the different working position;
First control of the said on-off valve mouthful said guide's oil circuit of connection; Second control of the said on-off valve mouthful said control valve of connection; And said control valve passes through to switch the corresponding said on-off valve of different working position connection, and the pressure of the second control mouth of the said on-off valve of change connection.
Preferably, said a plurality of clutches comprise both direction clutch and at least two gear clutches, and said control valve comprises position control valve and speed control valve, and said on-off valve comprises direction on-off valve and speed on-off valve;
The filler opening of each the said direction clutch filler opening of said direction on-off valve, each the said gear clutch said speed on-off valve of connecting of connecting;
The second control mouth of second control of the said direction on-off valve mouthful said position control valve of connection, said speed on-off valve connects said speed control valve; And said position control valve, said speed control valve are connected corresponding said direction on-off valve, said speed on-off valve through switching the different working position, and change the pressure of second control mouthful of second control mouthful of the said direction on-off valve of connecting, said speed on-off valve.
Preferably, said both direction clutch comprises forward clutch, back clutch, and said at least two gear clutches comprise one grade of clutch, second gear clutch and third gear clutch;
Said position control valve comprises first unloading port; When said position control valve was in second working position, said first drain tap was communicated with the second control mouth of said forward clutch; When said position control valve was in first working position, said first drain tap was communicated with the second control mouth of said back clutch;
Said speed control valve comprises second drain tap; When said speed control valve was in primary importance, said second drain tap was communicated with second control port of said one grade of clutch; When said speed control valve was in the second place, said second drain tap was communicated with second control port of said second gear clutch; When said speed control valve was in the 3rd position, said second drain tap was communicated with second control port of said third gear clutch.
Preferably, said guide's oil circuit is connected same oil hydraulic pump with the filler opening of said working connection, and said guide's oil circuit is provided with guide's reduction valve, the oil outlet of first control of said direction on-off valve, the said speed on-off valve mouthful said guide's reduction valve of connection.
Preferably, said speed control valve is three eight logical valves, and said position control valve is the 3-position-3-way valve; Said speed control valve comprises first oil circuit and second oil circuit that connects said forward clutch, said back clutch respectively; When said position control valve is in first working position; Said first drain tap is communicated with said forward clutch through said first oil circuit; When said position control valve was in second working position, said first drain tap was communicated with said back clutch through said second oil circuit.
Preferably, said working connection is provided with pressure regulator valve and quick return valve, and the oil outlet of said pressure regulator valve connects the filler opening of said quick return valve, and the oil outlet of said quick return valve connects said clutch.
Preferably, also comprise reduction valve, said reduction valve is located between said quick return valve and the said clutch.
Preferably, also be provided with sequence valve on the said working connection, the oil outlet of said sequence valve connects said pressure regulator valve.
The utility model provides a kind of hydraulic speed regulation system that is used for engineering machinery, and its fuel feeding road comprises guide's oil circuit and working connection, and the pressure of guide's oil circuit is less than the pressure of working connection; The equal parallel connection of each clutch is located on the working connection, and the filler opening of each clutch is in series with on-off valve, each on-off valve is switched on or switched off working connection through switching the different working position; First control of on-off valve mouthful is communicated with guide's oil circuit, and second control of on-off valve mouthful connects a control valve, and control valve connects corresponding on-off valve through switching the different working position, and changes the pressure of second control mouthful of the on-off valve of connecting.
Adopt this hydraulic speed regulation system; The pressure that the pressure that operator control mouth through second of control on-off valve in the course of the work is greater than or less than the first control mouth carries out speed regulating control; The first control mouth of on-off valve is communicated with guide's oil circuit all the time, and promptly the first control mouth pressure equals the pressure of guide's oil circuit.Because the pressure of guide's oil circuit is low, flow is little, thereby operator only need pay less steering force and can realize the control to the travelling speed of engineering machinery, have strengthened the operability and the working stability of hydraulic speed regulation system.
The utility model also provides a kind of engineering machinery, comprises vibration hydraulic system, and said vibration hydraulic system comprises hydraulic speed regulation system; Said hydraulic speed regulation system is aforesaid hydraulic speed regulation system.
Because above-mentioned hydraulic speed regulation system has above-mentioned technique effect, therefore, comprises that the engineering machinery of this hydraulic speed regulation system also should have above-mentioned technique effect, repeats no more at this.
Description of drawings
Fig. 1 is for being used for the hydraulic schematic diagram of the hydraulic speed regulation system of engineering machinery in the existing technology;
Fig. 2 is the hydraulic schematic diagram of a kind of embodiment of hydraulic speed regulation system that the utility model provides;
Fig. 3 is the structural representation of hydraulic speed regulation system shown in Figure 2;
Fig. 4 is the B-B sectional view of Fig. 3;
Fig. 5 is the A-A sectional view of Fig. 2;
Fig. 6 is that the X of Fig. 2 is to figure;
Fig. 7 is the pressure regulation plotted curve of hydraulic speed regulation system shown in Figure 2.
Wherein, reference character among Fig. 1 and the corresponding relation between the component names are:
Working connection 2 '; Position control valve 111 '; Speed control valve 112 '; Direction clutch 21 '; Speed clutch 22 '; Forward clutch 211 '; Back clutch 212 '; One grade of clutch 221 '; Second gear clutch 222 '; Third gear clutch 223 ';
Reference character and the corresponding relation between the component names among Fig. 2 to Fig. 7 are:
Guide's oil circuit 1; Working connection 2; Valve body 3; Valve seat 4; Valve gap 5;
Control valve 11; Guide's reduction valve 12; Position control valve 111; The first drain tap c; Speed control valve 112; The second drain tap d;
Direction clutch 21; Forward clutch 211; Back clutch 212; Speed clutch 22; One grade of clutch 221; Second gear clutch 222; Third gear clutch 223; On-off valve 23; Direction on-off valve 231; Speed on-off valve 232; The first control mouthful a; The second control mouthful b; Pressure regulator valve 24; Quick return valve 25; Reduction valve 26; Sequence valve 27;
Embodiment
The core of the utility model is that a kind of hydraulic speed regulation system that is used for engineering machinery is provided, and this system only needs less steering force can realize the walking control to engineering machinery, has operability and working stability preferably.Another core of the utility model is that a kind of engineering machinery that comprises above-mentioned hydraulic speed regulation system is provided.
In order to make those skilled in the art understand the technological scheme of the utility model better, the utility model is done further to specify below in conjunction with accompanying drawing and specific embodiment.
Please refer to Fig. 2 to Fig. 5, Fig. 2 is the hydraulic schematic diagram of a kind of embodiment of hydraulic speed regulation system that the utility model provides; Fig. 3 is the structural representation of hydraulic speed regulation system shown in Figure 2; Fig. 4 is the B-B sectional view of Fig. 3; Fig. 5 is the A-A sectional view of Fig. 2.
In a kind of embodiment, as shown above, the utility model provides a kind of hydraulic speed regulation system that is used for engineering machinery, comprises a plurality of clutches and control valve 11; The fuel feeding road of hydraulic speed regulation system comprises guide's oil circuit 1 and working connection 2, and the pressure of guide's oil circuit 1 is less than the pressure of working connection 2; The equal parallel connection of each clutch is located on the working connection 2, and the filler opening of each clutch is in series with on-off valve 23, each on-off valve 23 is switched on or switched off working connection 2 through switching the different working position; The first control mouthful a of on-off valve 23 is communicated with guide's oil circuit 1; The second control mouthful b of on-off valve 23 connects control valve 11; And control valve 11 is connected corresponding on-off valve 23 through switching the different working position, and changes the pressure of the second control mouthful b of the on-off valve of connecting 23.
Adopt this structure; In the working procedure of hydraulic speed regulation system; Operator's switching control valve 11 makes it change the working position, connects an on-off valve 23 corresponding with this working position of control valve 11, and changes the pressure of the second control mouthful b of this on-off valve 23; The pressure that makes second of on-off valve 23 control mouthful b is greater than or less than the pressure of the first control mouthful a; On-off valve 23 switches to another working position by a position under the first control mouthful a pressure and the second control mouthful pressure difference that b pressure forms, realized being switched on or switched off of working connection 2; Make working connection 2 to the clutch feed or the fuel cut-off of connecting, and then realize the travelling speed of engineering machinery is adjusted with this on-off valve 23.
Can find out by above-mentioned working procedure; Adopt this hydraulic speed regulation system; The pressure that the pressure that operator control mouthful b through second of control on-off valve 23 in the course of the work is greater than or less than the first control mouthful a carries out speed regulating control; A first control mouthful a of on-off valve 23 is communicated with guide's oil circuit 1 all the time, and promptly first control mouthful a pressure equals the pressure of guide's oil circuit 1.Because the pressure of guide's oil circuit is low, flow is little, thereby operator only need pay less steering force and can realize the control to the travelling speed of engineering machinery, have strengthened the operability and the working stability of hydraulic speed regulation system.
The specific constructive form of above-mentioned clutch, above-mentioned on-off valve 23 and above-mentioned control valve 11 can also further be set.
In concrete scheme, as shown in Figure 2, a plurality of clutches of above-mentioned hydraulic speed regulation system comprise both direction clutch 21 and at least two gear clutches, and control valve 11 comprises position control valve 111 and speed control valve 112; The filler opening series connection direction on-off valve 231 of each direction clutch 21, the filler opening series connection speed on-off valve 232 of each gear clutch; The second control mouthful b connection speed control valve 112 of second control of direction on-off valve 231 mouthful b connecting direction control valve 111, speed on-off valve 232; And position control valve 111, speed control valve 112 connected corresponding direction on-off valve 231, speed on-off valve 232 through switching the different working position, and changes the pressure of the second control mouthful b of second a control mouthful b, the speed on-off valve 232 of the direction on-off valve of connecting 231.
Adopt this structure; Through steering control valve 111 direction clutch 21 and working connection 2 are connected or disconnected; Through handling speed control valve 112 speed clutch 22 and working connection 2 are connected or disconnected; Make above-mentioned hydraulic speed regulation system all can realize through less steering force to the size and Orientation of the running velocity of engineering machinery; Promptly, also can realize, further improve the operability of hydraulic speed regulation system through manual control for the high-power engineering machinery.
In scheme further, the both direction clutch 21 in the above-mentioned hydraulic speed regulation system comprises forward clutch 211, back clutch 212, and at least two gear clutches comprise one grade of clutch 221, second gear clutch 222 and third gear clutch 223.Position control valve 111 comprises the first drain tap c, and when position control valve 111 was in second working position, the first drain tap c was communicated with second a control mouthful b of forward clutch 211; When position control valve 111 was in first working position, the first drain tap c was communicated with second a control mouthful b of back clutch 212.Speed control valve 112 comprises the second drain tap d, and when speed control valve 112 was in primary importance, the second drain tap d was communicated with second control port of one grade of clutch 221; When speed control valve 112 was in the second place, the second drain tap d was communicated with second control port of second gear clutch 222; When speed control valve 112 was in the 3rd position, the second drain tap d was communicated with second control port of third gear clutch 223.
Adopt this structure; With concrete working position shown in Figure 2 is example; The first drain tap c, the second drain tap d are set respectively on position control valve 111, speed control valve 112, when position control valve 111 switches to second working position, the first drain tap c unloading of the pressure direction of passage control valve 111 of the second control mouthful b of the direction on-off valve 231 of connecting with forward clutch 211; Make this direction on-off valve 231 under the differential pressure action of its throttle orifice both sides, switch to the working position, right side by the working position, left side; Realize the conducting of working connection 2, promptly working connection 2 clutch 211 fuel feeding that march forward are realized the control to the velocity attitude of engineering machinery.
When speed control valve 112 switches to first working position; The pressure of the second control port b of the speed on-off valve 232 of connecting with one grade of clutch 221 is through the second unloading mouthful d unloading of speed control valve 112; Make this speed on-off valve 232 under the differential pressure action of its throttle orifice both sides, switch to the working position, right side by the working position, left side; Realize the conducting of working connection 2, promptly working connection 2 is realized the control to the velocity magnitude of engineering machinery to one grade of clutch 221 fuel feeding.
Adopt this structure; The mode that connects fuel tank through hydraulic fluid port with position control valve 111, speed control valve 112 has promptly realized the pressure reduction of direction on-off valve 231, speed on-off valve 232 both sides is regulated, make above-mentioned hydraulic speed regulation system have simple in structure, control characteristics easily.Certainly, except the mode that adopts draining changes the pressure that second of each on-off valve is controlled mouthful b, can also be through other any modes that realizes clutch pressure modulation by pressure reduction control.
The concrete set-up mode of above-mentioned guide's oil circuit 1 can also further be set.
In another kind of embodiment; Above-mentioned guide's oil circuit 1 is connected same oil hydraulic pump with the filler opening of working connection 2; And guide's oil circuit 1 is provided with guide's reduction valve 12, and the first control mouthful a of direction on-off valve 231, speed on-off valve 232 is communicated with the oil outlet of guide's reduction valve 12.
Adopt the said structure form; Adopt guide's reduction valve 12 that the pressure of the fluid of oil hydraulic pump output is reduced; Make the pressure of guide's oil circuit 1 less than the pressure of working connection 2; Because guide's oil circuit flow is less, thereby guarantee that less steering force gets final product the working position of switching direction control valve 111, speed control valve 112.This set mode has simple and compact for structure, and the higher characteristics of stability.Certainly; Above-mentioned guide's oil circuit 1 is not limited in and is connected same hydraulic pressure pump structure with working connection 2; An auxiliary hydraulic pump that flow is less can also be set; This auxiliary hydraulic pressure delivery side of pump is communicated with guide's oil circuit 1, and the pressure that operator equally only need overcome guide's oil circuit 1 carries out direction control valve 111, speed control valve 112 are operated, and improves the operability of hydraulic speed regulation system.
In the scheme, above-mentioned speed control valve 112 can be three eight logical valves more specifically, and position control valve 111 can be the 3-position-3-way valve; Speed control valve 112 comprises first oil circuit and second oil circuit that connects forward clutch 211, back clutch 212 respectively and remain connection; When position control valve 111 is in first working position; The first drain tap c is communicated with forward clutch 211 through first oil circuit; When position control valve 111 was in second working position, the first drain tap c was communicated with back clutch 212 through second oil circuit.
Adopt this structural type; Position control valve 111 is communicated with forward clutch 211, back clutch 212 through speed control valve 112; Be that position control valve 111 is connected with the mode of speed control valve 112 through series connection, this makes hydraulic speed regulation system have advantage simple and compact for structure.Certainly, above-mentioned position control valve 111 can also adopt independent control with speed control valve 112.
Specific to the concrete structure of above-mentioned control valve 11, please refer to Fig. 4 and Fig. 6, Fig. 6 is that the X of Fig. 2 is to figure.Like Fig. 4 and shown in Figure 6; Above-mentioned control valve 11 can comprise direction rotating shaft 51, speed rotating shaft 52, fan tooth arm 53, first Rocker arm 54 and second Rocker arm 55, and in the working procedure, fan tooth arm 53 passes through bolt in speed rotating shaft 52; First Rocker arm 54 is connected in the direction rotating shaft 51 by bearing; Have bearing pin on first Rocker arm 54, mesh together with the inside groove of fanning on the tooth arm 53, the outside is tightened them by extension spring; Have bearing pin on the fan tooth arm 53, be connected in position control valve 111 fork slots.When the bearing pin of pulling direction rotating shaft 51, the first Rocker arm 5s 4 rolls in the inside groove of fan tooth arm 53, the position sense when making the gear shift action is very clear and definite.Have bearing pin on second Rocker arm 55; In direction rotating shaft 51, bearing pin is stuck in speed control valve 112 fork slots, trough of belt on the position control valve 112 through bolt for it; Positioning device compaction direction control valve 112 on the valve body, the position sense when making the switching-over action is clear and definite.
Can also further be located at the control block hydraulic unit with of above-mentioned working connection 2.
When service speed control valve 112 was shifted gears, clutch meshed under piston action, but because working connection 2 pressure are higher, piston action is very fast, and clutch also meshes together rapidly, this can make vehicle start suddenly, causes the vehicle strenuous vibration.For avoiding the generation of this kind phenomenon, as shown in Figure 2 in another kind of embodiment, above-mentioned working connection 2 can be provided with pressure regulator valve 24 and quick return valve 25, and the oil outlet of pressure regulator valve 24 connects the filler opening of quick return valve 25, and the oil outlet of quick return valve 25 connects clutch.
Adopt this structure; Please refer to Fig. 7, Fig. 7 is the pressure regulation plotted curve of hydraulic speed regulation system shown in Figure 2, when service speed control valve 112 is shifted gears action; For example shown in Figure 7 when switching the position second gear by one grade; Fluid from oil hydraulic pump is filled with second gear clutch 222 gradually through the spool of on-off valve 23, and for filling with time t1, this moment, the force value of oil pressure was approximately 0～0.3MPa during this period of time.After fluid was filled with clutch, oil pressure rose to the setting of pressure regulator valve 24 gradually, was oil pressure t2 building-up time during this period of time, and the summation of filling with time t1 and oil pressure t2 building-up time becomes pressure regulation time t.In above-mentioned shift process, the pressure regulation effect of pressure regulator valve 24 is slowly risen the oil pressure that acts on piston, so clutch smoothly meshes together, and just can not produce strenuous vibration during vehicle launch so, has improved the durability of transmission component and the travelling comfort of operation.
In scheme further, above-mentioned hydraulic speed regulation system also is provided with reduction valve 26 on the branch road at one grade of clutch, 221 places, and the oil outlet of this reduction valve 26 connects one grade of on-off valve 23.
Adopt this structure, make the pressure that acts on one grade of clutch 221 reduce (for example reducing to 2.16MPa), the oil circuit seal ring of one grade of clutch 221 of protection can not damaged the working life of further improving each component by too high oil pressure.
In another kind of embodiment, also be provided with sequence valve 27 on the working connection 2 of above-mentioned hydraulic speed regulation system, the oil outlet of sequence valve 27 connects pressure regulator valve 24.
When service speed control valve 112 switch operating positions; Speed change oil circuit pressure is reduced suddenly; Sequence valve 27 can play and break off working connection 2 and guide's oil circuit 1 this moment, effectively guaranteed the realization of speed change and commutation process, and prevented to bring in the speed-change process impact of transmission part.
In addition, this law also provides a kind of engineering machinery, comprises vibration hydraulic system, and vibration hydraulic system comprises hydraulic speed regulation system; Hydraulic speed regulation system is as above-mentioned hydraulic speed regulation system.
Because above-mentioned hydraulic speed regulation system has above-mentioned technique effect, therefore, comprises that the engineering machinery of this hydraulic speed regulation system also should have identical technique effect, repeats no more at this.
A kind of engineering machinery and hydraulic speed regulation system thereof to the utility model provided have carried out detailed introduction.Used concrete example among this paper the principle and the mode of execution of the utility model are set forth, above embodiment's explanation just is used to help to understand the method and the core concept thereof of the utility model.Should be understood that; For those skilled in the art; Under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (9)
1. a hydraulic speed regulation system that is used for engineering machinery comprises a plurality of clutches and control valve (11); It is characterized in that,
The fuel feeding road of said hydraulic speed regulation system comprises guide's oil circuit (1) and working connection (2), and the pressure of said guide's oil circuit (1) is less than the pressure of said working connection (2);
The equal parallel connection of each said clutch is located on the said working connection (2), and the filler opening of each said clutch is in series with on-off valve (23), each on-off valve (23) is switched on or switched off said working connection (2) through switching the different working position;
First control of said on-off valve (23) mouthful connection said guide's oil circuit (1); Second control of said on-off valve (23) mouthful connection said control valve (11); And said control valve (11) passes through to switch the corresponding said on-off valve (23) of different working position connection, and the pressure of the second control mouth of the said on-off valve (23) of change connection.
2. the hydraulic speed regulation system that is used for engineering machinery according to claim 1; It is characterized in that; Said a plurality of clutch comprises both direction clutch (21) and at least two gear clutches; Said control valve (11) comprises position control valve (111) and speed control valve (112), and said on-off valve (23) comprises direction on-off valve (231) and speed on-off valve (232);
The filler opening of each said direction clutch (21) filler opening of said direction on-off valve (231), each the said gear clutch said speed on-off valve (232) of connecting of connecting;
The second control mouth of second control of said direction on-off valve (231) mouthful connection said position control valve (111), said speed on-off valve (232) connects said speed control valve (112); And said position control valve (111), said speed control valve (112) are connected corresponding said direction on-off valve (231), said speed on-off valve (232) through switching the different working position, and change the pressure of second control mouthful of second control mouthful, the said speed on-off valve (232) of the said direction on-off valve of connecting (231).
3. the hydraulic speed regulation system that is used for engineering machinery according to claim 2; It is characterized in that; Said both direction clutch (21) comprises forward clutch (211), back clutch (212), and said at least two gear clutches comprise one grade of clutch (221), second gear clutch (222) and third gear clutch (223);
Said position control valve (111) comprises first unloading port; When said position control valve (111) was in second working position, said first drain tap was communicated with the second control mouth of said forward clutch (211); When said position control valve (111) was in first working position, said first drain tap was communicated with the second control mouth of said back clutch (212);
Said speed control valve (112) comprises second drain tap; Said speed control valve (112) is when being in primary importance, and said second drain tap is communicated with second control port of said one grade of clutch (221); Said speed control valve (112) is when being in the second place, and said second drain tap is communicated with second control port of said second gear clutch (222); When said speed control valve (112) was in the 3rd position, said second drain tap was communicated with second control port of said third gear clutch (223).
4. the hydraulic speed regulation system that is used for engineering machinery according to claim 2; It is characterized in that; Said guide's oil circuit (1) is connected same oil hydraulic pump with the filler opening of said working connection (2); And said guide's oil circuit (1) is provided with guide's reduction valve (12), the oil outlet of the first control mouthful said guide's reduction valve of connection (12) of said direction on-off valve (231), said speed on-off valve (232).
5. the hydraulic speed regulation system that is used for engineering machinery according to claim 3 is characterized in that, said speed control valve (112) is three eight logical valves, and said position control valve (111) is the 3-position-3-way valve; Said speed control valve (112) comprises first oil circuit and second oil circuit that connects said forward clutch (211), said back clutch (212) respectively; When said position control valve (111) is in first working position; Said first drain tap is communicated with said forward clutch (211) through said first oil circuit; When said position control valve (111) was in second working position, said first drain tap was communicated with said back clutch (212) through said second oil circuit.
6. according to each described hydraulic speed regulation system that is used for engineering machinery of claim 1-5; It is characterized in that; Said working connection (2) is provided with pressure regulator valve (24) and quick return valve (25); The oil outlet of said pressure regulator valve (24) connects the filler opening of said quick return valve (25), and the oil outlet of said quick return valve (25) connects said clutch.
7. the hydraulic speed regulation system that is used for engineering machinery according to claim 6 is characterized in that, also comprises reduction valve (26), and said reduction valve (26) is located between said quick return valve (25) and the said clutch.
8. the hydraulic speed regulation system that is used for engineering machinery according to claim 7 is characterized in that, also is provided with sequence valve (27) on the said working connection (2), and the oil outlet of said sequence valve (27) connects said pressure regulator valve (24).
9. an engineering machinery comprises vibration hydraulic system, and said vibration hydraulic system comprises hydraulic speed regulation system; It is characterized in that said hydraulic speed regulation system is like each described hydraulic speed regulation system of claim 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220243877 CN202597301U (en) | 2012-05-28 | 2012-05-28 | Engineering mechanism and hydraulic speed regulating system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220243877 CN202597301U (en) | 2012-05-28 | 2012-05-28 | Engineering mechanism and hydraulic speed regulating system thereof |
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| Publication Number | Publication Date |
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| CN202597301U true CN202597301U (en) | 2012-12-12 |
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| CN 201220243877 Expired - Fee Related CN202597301U (en) | 2012-05-28 | 2012-05-28 | Engineering mechanism and hydraulic speed regulating system thereof |
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| CN (1) | CN202597301U (en) |
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2012
- 2012-05-28 CN CN 201220243877 patent/CN202597301U/en not_active Expired - Fee Related
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