CN113464356A - Hydraulic driving device suitable for closed system - Google Patents
Hydraulic driving device suitable for closed system Download PDFInfo
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- CN113464356A CN113464356A CN202110896309.3A CN202110896309A CN113464356A CN 113464356 A CN113464356 A CN 113464356A CN 202110896309 A CN202110896309 A CN 202110896309A CN 113464356 A CN113464356 A CN 113464356A
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- hydraulic motor
- inner cavity
- brake
- hydraulic
- oil
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
- F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
- F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F03C1/0644—Component parts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
- F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F03C1/0644—Component parts
- F03C1/0655—Valve means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
- F03C1/0678—Control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
- F03C1/0678—Control
- F03C1/0686—Control by changing the inclination of the swash plate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H47/00—Combinations of mechanical gearing with fluid clutches or fluid gearing
- F16H47/02—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the volumetric type
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Hydraulic Motors (AREA)
Abstract
The invention discloses a hydraulic driving device suitable for a closed system, which comprises a hydraulic motor and a speed reducing mechanism, the bottom of the left side of the hydraulic motor inner cavity is provided with a valve body combination mechanism, the top of the left side of the hydraulic motor inner cavity is provided with an end cover, a brake spring is arranged on the left side of the inner cavity of the hydraulic motor, a brake ring is arranged in the inner cavity of the hydraulic motor and corresponds to the position of the brake spring, the inner side of the brake ring is provided with a brake rubber sheet, the inner side of the brake ring is provided with a brake steel sheet, the inner side of the brake ring is provided with a spline housing, the top of the hydraulic motor is provided with a sealing plug through threads, the inner cavity of the hydraulic motor is provided with a framework oil seal, a bearing is arranged in the inner cavity of the hydraulic motor and corresponds to the position of the framework oil seal, and an oil distribution disc is arranged in the inner cavity of the hydraulic motor and corresponds to the position of the bearing. The invention solves the problems of single function and poor applicability of the existing open type hydraulic system.
Description
Technical Field
The invention relates to the technical field of hydraulic drive, in particular to a hydraulic drive device suitable for a closed system.
Background
At present, a closed hydraulic system is adopted for transmission on a plurality of engineering devices, compared with an open hydraulic system, an oil suction port of a hydraulic pump in the closed hydraulic system is directly connected with an oil return port of an actuating element, a working medium is in closed circulation in the system, so the transmission stability is good, the control mode generally realizes the control of speed and direction by regulating the displacement of a pump or a motor, so the closed hydraulic system can avoid the hydraulic impact and the energy loss generated by throttling when the system is reversed, the existing closed hydraulic system is designed to be suitable for wheel side driving devices such as a bulldozer, a paver and the like, the slope sliding phenomenon can be avoided when the device is stopped by a built-in parking brake, the hydraulic driving device can be cooled and the internal impurities can be washed by a built-in flushing valve, the closed hydraulic system is suitable for complex working environments by a built-in variable mechanism, and a rotating speed sensor can be selectively installed, the control of the rotating speed of the hydraulic driving device can be realized, and the unmanned operation can be realized by processing the pulse signal output by the rotating speed sensor.
Disclosure of Invention
In order to solve the problems in the background art, the present invention provides a hydraulic driving device suitable for a closed system, which has the advantage of multiple functions and solves the problems of single function and poor applicability of the existing open hydraulic system.
In order to achieve the purpose, the invention provides the following technical scheme: a hydraulic driving device suitable for a closed system comprises a hydraulic motor and a speed reducing mechanism, wherein a valve body combination mechanism is arranged at the left bottom of an inner cavity of the hydraulic motor, an end cover is arranged at the left top of the inner cavity of the hydraulic motor, a brake spring is arranged at the left side of the inner cavity of the hydraulic motor, a brake ring is arranged in the inner cavity of the hydraulic motor and corresponds to the position of the brake spring, a brake film is arranged at the inner side of the brake ring, a brake steel sheet is arranged at the inner side of the brake ring, a spline sleeve is arranged at the inner side of the brake ring, a sealing plug is arranged at the top of the hydraulic motor through threads, a framework oil seal is arranged in the inner cavity of the hydraulic motor, a bearing is arranged in the position corresponding to the framework oil seal, an oil distribution disc is arranged in the inner cavity of the hydraulic motor and corresponds to the position of the bearing, and a cylinder body combination member is arranged in the inner cavity of the hydraulic motor and corresponds to the right side of the oil distribution disc, the swash plate assembly is arranged at the bottom of the right side of the inner cavity of the hydraulic motor, the variable piston is arranged on the right side of the inner cavity of the hydraulic motor, and the main shaft is arranged on the right side of the inner cavity of the hydraulic motor.
Preferably, the valve body combination mechanism comprises a flushing valve core, the bottom of the flushing valve core is provided with a one-way valve, and two sides of the one-way valve are provided with a throttling oil nozzle and an oil drainage port.
Preferably, the speed reducing mechanism comprises a shell, a floating oil seal is arranged on the right side of the shell, a gear ring is arranged on the right side of an inner cavity of the shell, an angular contact ball bearing is arranged on the right side of the inner cavity of the shell, a locking nut is arranged on the right side of the inner cavity of the shell, a secondary speed reducing part is arranged on the right side of the inner cavity of the shell, a primary speed reducing part is arranged on the right side of the inner cavity of the shell, and an end cover assembly is arranged on the right side of the inner cavity of the shell.
Preferably, the sealing plug is made of cast iron and is matched with the hydraulic motor for use.
Preferably, the type of the hydraulic motor is LTMVB, and the hydraulic motor is made of aluminum alloy.
Preferably, the brake spring is made of alloy steel, and the brake spring is matched with the brake ring for use.
Preferably, the bearing is made of steel, and the bearing is annular.
Preferably, the main shaft is made of bearing steel, and the main shaft is used in cooperation with the hydraulic motor.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention uses the combination of a hydraulic motor, a speed reducing mechanism, a valve body combination mechanism, an end cover, a brake spring, a brake ring, a brake rubber sheet, a brake steel sheet, a spline housing, a sealing plug, a framework oil seal, a bearing, an oil distribution disc, a cylinder body combination piece, a swash plate combination piece, a variable piston 16 and a main shaft, when a user works on the hydraulic pump, the hydraulic pump presses hydraulic oil out of an oil outlet to enter an oil inlet at the hydraulic motor and the valve body combination mechanism, then enters the inside of the cylinder body combination piece through an oil distribution groove of the oil distribution disc and pushes a plunger part to act on the swash plate combination piece, so the swash plate combination piece can generate a reaction force, and as the plunger part and the swash plate part have an angular relationship, the radial component force generated by the reaction force enables the cylinder combination piece to generate torque, thereby the cylinder combination piece rotates, and the cylinder combination piece is connected with the main shaft through a spline, therefore, the main shaft can rotate along with the oil cylinder assembly, thereby realizing the output of rotating speed and torque, when the hydraulic pump works reversely, the hydraulic motor also works reversely, when the hydraulic motor is started, the brake should be released firstly, which is realized by leading pressure to act on the inner part of the brake ring to generate upward force to overcome the acting force generated by the brake spring, thereby the brake ring moves upwards, the brake rubber sheet and the brake steel sheet are separated, no friction force exists between the brake rubber sheet and the brake steel sheet, the brake rubber sheet and the spline housing are connected through the spline, the spline housing sleeved outside the main shaft is not stressed, the hydraulic motor releases the brake, when the hydraulic motor stops rotating, the pilot pressure for releasing the brake is closed, the spring force acts on the brake ring, the brake ring acts on the brake rubber sheet and the brake steel sheet, so that the friction force of the two products is transmitted to the main shaft, and the product brake force is changed from large displacement to small displacement when the hydraulic motor needs to be changed: when the motor is switched from small displacement to large displacement, the variable displacement control pilot pressure is closed, the variable displacement control valve core moves leftwards under the action of spring force to reach a limit, the liquid in the variable piston can be communicated with the oil drainage port through the one-way valve and the two throttling oil nozzles, the variable piston moves downwards under the action of the swash plate assembly, the swash plate assembly recovers to an initial angle, and the displacement of the motor is switched, when the oil inlet and outlet of the hydraulic motor passes through high-pressure oil, the flushing valve core is moved to the low-pressure side by overcoming the spring force by pressure, low-pressure side pressure oil is led to the one-way valve core, when the oil supplementing pressure of the system is greater than the opening pressure of the one-way valve, the one-way valve is opened, the low-pressure side oil of the hydraulic motor enters the inner cavity of the motor to be flushed and cooled, the opening pressure of the flushing valve core can be customized according to the requirements of customers, the output rotating speed of the motor is transmitted to the first-stage speed reducing component through a spline, the first-stage speed reducing component transmits the rotating speed to the second-stage speed reducing component through spline connection, and finally the reduction of the rotating speed and the amplification of torque are realized through the gear ring, so that the multifunctional function of the existing open type hydraulic system is single and the problem of poor application capability is solved.
2. The invention can lead the pressure to the inner cavity of the hydraulic motor for flushing and cooling by the arrangement of the valve body combination mechanism in cooperation with the one-way valve and the throttling oil nozzle.
3. The hydraulic motor can transmit power to the first-stage speed reducing component through the arrangement of the speed reducing mechanism, and the first-stage speed reducing component transmits the power to the second-stage speed reducing component and finally reduces torque through the gear ring.
4. According to the hydraulic motor sealing structure, the sealing plug is made of cast iron, so that the strength of the sealing plug can be increased, and the phenomenon that the sealing plug loosens and falls off in the process of working with a hydraulic motor is avoided.
5. According to the invention, the hydraulic motor is provided with the LTMOVB, so that the rotating speed and the torque of the hydraulic motor can achieve the actual effect, and the situation that the hydraulic motor cannot work mechanically due to the failure of the power motor is avoided.
6. According to the invention, the brake spring is made of alloy steel, so that the toughness of the brake spring can be increased, the low mechanical working efficiency caused by the loss increase of the brake spring in the repeated working process is avoided, and the service life of the brake spring is prolonged.
7. According to the invention, the bearing is made of steel, so that the metal strength of the bearing can be increased, the phenomenon that the bearing is damaged in the working process of matching with the hydraulic motor is avoided, and the safety of mechanical work is improved.
8. According to the invention, the spindle is made of bearing steel, so that the strength of the spindle can be improved, and the influence of loss increase of the spindle on long-time use of machinery in the working process is avoided.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a right side view of the hydraulic motor arrangement of FIG. 1 in accordance with the present invention;
FIG. 3 is a cross-sectional view of the hydraulic motor of FIG. 1 according to the present invention;
FIG. 4 is a sectional view of the valve body assembly of FIG. 2 according to the present invention;
FIG. 5 is a sectional view of the reduction mechanism shown in FIG. 3 according to the present invention;
fig. 6 is a partial structural sectional view of the valve body assembly of fig. 2 according to the present invention.
In the figure: 1. a hydraulic motor; 2. a speed reduction mechanism; 21. a housing; 22. floating oil seal; 23. a ring gear; 24. angular contact ball bearings; 25. locking the nut; 26. a secondary speed reduction component; 27. a primary speed reduction member; 28. an end cap assembly; 3. a valve body assembly mechanism; 31. flushing the valve core; 32. a one-way valve; 33. a throttling oil nozzle; 34. an oil drainage port; 4. an end cap; 5. a brake spring; 6. a brake ring; 7. braking the rubber sheet; 8. braking a steel sheet; 9. a spline housing; 10. sealing and plugging; 11. framework oil seal; 12. a bearing; 13. an oil distribution disc; 14. a cylinder block assembly; 15. a swash plate assembly; 16. a variable piston; 17. a main shaft.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 6, the hydraulic driving device suitable for a closed system provided by the present invention comprises a hydraulic motor 1 and a speed reducing mechanism 2, a valve body combination mechanism 3 is arranged at the bottom of the left side of the inner cavity of the hydraulic motor 1, an end cover 4 is arranged at the top of the left side of the inner cavity of the hydraulic motor 1, a brake spring 5 is arranged at the left side of the inner cavity of the hydraulic motor 1, a brake ring 6 is arranged in the inner cavity of the hydraulic motor 1 and corresponding to the position of the brake spring 5, a brake rubber sheet 7 is arranged at the inner side of the brake ring 6, a brake steel sheet 8 is arranged at the inner side of the brake ring 6, a spline housing 9 is arranged at the inner side of the brake ring 6, a sealing plug 10 is arranged at the top of the hydraulic motor 1 through a thread, a framework oil seal 11 is arranged in the inner cavity of the hydraulic motor 1 and corresponding to the position of the framework oil seal 11, an oil distributing disc 13 is arranged in the inner cavity of the hydraulic motor 1 and corresponding to the position of the bearing 12, a cylinder assembly 14 is arranged in the inner cavity of the hydraulic motor 1 and on the right side corresponding to the oil distribution disc 13, a swash plate assembly 15 is arranged at the bottom of the right side of the inner cavity of the hydraulic motor 1, a variable piston 16 is arranged on the right side of the inner cavity of the hydraulic motor 1, and a main shaft 17 is arranged on the right side of the inner cavity of the hydraulic motor 1.
Referring to fig. 1, the valve body combination mechanism 3 comprises a flushing valve core 31, a one-way valve 32 is arranged at the bottom of the flushing valve core 31, and a throttling oil nozzle 33 and an oil drain port 34 are arranged on two sides of the one-way valve 32.
Adopt above-mentioned scheme: through the arrangement of the valve body combination mechanism 3, the flushing valve core 31 can be matched with the one-way valve 32 and the throttling oil nozzle 33 to guide the pressure to the inner cavity of the hydraulic motor 1 for flushing and cooling.
Referring to fig. 2, the speed reducing mechanism 2 includes a housing 21, a floating oil seal 22 is provided on the right side of the housing 21, a ring gear 23 is provided on the right side of the inner cavity of the housing 21, an angular contact ball bearing 24 is provided on the right side of the inner cavity of the housing 21, a lock nut 25 is provided on the right side of the inner cavity of the housing 21, a secondary speed reducing component 26 is provided on the right side of the inner cavity of the housing 21, a primary speed reducing component 27 is provided on the right side of the inner cavity of the housing 21, and an end cover assembly 28 is provided on the right side of the inner cavity of the housing 21.
Adopt above-mentioned scheme: by providing the speed reducing mechanism 2, the hydraulic motor 1 can be made to operate to transmit power to the primary speed reducing member 27, and the primary speed reducing member 27 transmits power to the secondary speed reducing member 26 to finally reduce torque by the ring gear 23.
Referring to fig. 1, the sealing plug 10 is made of cast iron, and the sealing plug 10 is used in cooperation with the hydraulic motor 1.
Adopt above-mentioned scheme: the sealing plug 10 is made of cast iron, so that the strength of the sealing plug 10 can be increased, and the phenomenon that the sealing plug 10 loosens and falls off in the working process of the hydraulic motor 1 is avoided.
Referring to fig. 1, the hydraulic motor 1 is LTM04VB, and the hydraulic motor 1 is made of aluminum alloy.
Adopt above-mentioned scheme: through the arrangement that the type of the hydraulic motor 1 is LTMO4VB, the rotating speed and the torque of the hydraulic motor 1 can achieve the actual effect, and the situation that the power of the hydraulic motor 1 cannot reach the power and the mechanical work cannot be carried out is avoided.
Referring to fig. 1, the material of the brake spring 5 is alloy steel, and the brake spring 5 is used in cooperation with the brake ring 6.
Adopt above-mentioned scheme: the brake spring 5 is made of alloy steel, so that the toughness of the brake spring 5 can be improved, the problem that the loss of the brake spring 5 is increased in the repeated working process to cause low mechanical working efficiency is avoided, and the service life of the brake spring 5 is prolonged.
Referring to fig. 1, the bearing 12 is made of steel, and the bearing 12 is annular.
Adopt above-mentioned scheme: the bearing 12 is made of steel, so that the metal strength of the bearing 12 can be increased, the phenomenon that the bearing 12 is damaged in the working process of the hydraulic motor 1 is avoided, and the safety of mechanical work is improved.
Referring to fig. 1, the main shaft 17 is made of bearing steel, and the main shaft 17 is used in cooperation with the hydraulic motor 1.
Adopt above-mentioned scheme: the main shaft 17 is made of bearing steel, so that the strength of the main shaft 17 can be improved, and the influence of loss increase of the main shaft 17 on long-time use of machinery in the working process is avoided.
The working principle and the using process of the invention are as follows: when the hydraulic pump is used, when a user works, the hydraulic pump presses hydraulic oil out of an oil outlet to enter the oil inlet at the hydraulic motor 1 and the valve body combination mechanism 3, then the hydraulic oil enters the inside of the cylinder body combination unit 14 through an oil distribution groove of the oil distribution disc 13, the plunger part is pushed to act on the swash plate combination unit 15, so the swash plate combination unit 15 generates a reaction force, because the plunger part and the swash plate part 15 have an angular relationship, the radial component force generated by the reaction force enables the cylinder combination unit to generate torque, so the cylinder combination unit rotates, the cylinder combination unit is connected with the main shaft 17 through a spline, so the main shaft 17 rotates along with the cylinder combination unit, so that the output of the rotating speed and the torque is realized, when the hydraulic pump works reversely, the hydraulic motor 1 also works reversely, when the hydraulic motor 1 is started, the brake is firstly released, particularly, the brake ring 6 is acted through pilot pressure, the upward force is generated to overcome the acting force generated by the brake spring 5, so that the brake ring 6 moves upwards, the brake rubber sheet 7 and the brake steel sheet 8 are separated, no friction force exists between the brake rubber sheet 7 and the spline housing 9, the spline housing 9 sleeved outside the main shaft 17 is not stressed, the hydraulic motor 1 releases braking, when the hydraulic motor 1 stops rotating, the pilot pressure for releasing braking is closed, the spring force acts on the brake ring 6, the brake ring 6 acts on the brake rubber sheet 7 and the brake steel sheet 8, so that the friction force between the brake rubber sheet 7 and the brake steel sheet 8 is transmitted to the main shaft 17, and the braking force of a product is transmitted to the main shaft 17, when the hydraulic motor 1 needs to be switched from large displacement to small displacement: the variable displacement control pilot pressure is communicated and acts on the left side of the variable displacement control valve core to push the compression spring to move rightwards, hydraulic oil in the spring cavity enters the inner cavity of the shell 21 through the oil drain port 34, at the moment, the hydraulic oil at the oil inlet and the oil outlet of the motor passes through two throttling oil nozzles 33, the high-pressure side of the one-way valve 32 is opened preferentially, the hydraulic oil acts on the variable piston 16 through an oil duct to push the variable piston 16 to move upwards to generate an arm of force so as to push the swash plate assembly 15 to rotate, so that the displacement of the motor is changed, when the motor is switched from small displacement to large displacement, the variable displacement control pilot pressure is closed, the variable displacement control valve core moves leftwards under the action of spring force to reach a limit position, at the moment, liquid in the variable piston 16 is communicated with the oil drain port 34 through the one-way valve 32 and the two throttling oil nozzles 33, the variable piston 16 moves downwards under the action of the swash plate assembly 15, and the swash plate assembly 15 is restored to an initial angle, realize the motor displacement and switch, when hydraulic motor 1 advances the oil outlet and passes through high-pressure oil, wash case 31 and overcome the spring force by pressure and move to the low pressure side, lead low pressure side pressure oil to check valve 32 core department, when system's oil supply pressure is greater than check valve 32 cracking pressure, check valve 32 opens, hydraulic motor 1 low pressure side oil gets into the motor inner chamber and washes and cool down, wash case 31 cracking pressure can be customized according to customer's demand, motor output rotational speed transmits the rotational speed for one-level speed reduction part 27 through the spline, one-level speed reduction part 27 transmits the rotational speed to second grade speed reduction part 26 through splined connection, finally realize the reduction of rotational speed and the amplification of moment of torsion through ring gear 23, realize multi-functional effect.
In summary, the following steps: the hydraulic driving device suitable for the closed system is characterized in that a hydraulic motor 1, a speed reducing mechanism 2, a valve body combination mechanism 3, an end cover 4, a brake spring 5, a brake ring 6, a brake rubber sheet 7, a brake steel sheet 8, a spline sleeve 9, a sealing plug 10, a framework oil seal 11, a bearing 12, an oil distribution disc 13, a cylinder body combination part 14, a swash plate combination part 15, a variable piston 16 and a main shaft 17 are matched for use, when a user works the hydraulic pump, the hydraulic pump presses hydraulic oil out of an oil outlet to enter the hydraulic motor 1 and an oil inlet at the valve body combination mechanism 3, then enters the cylinder body combination part 14 through an oil distribution groove of the oil distribution disc 13 to push a plunger part to act on the swash plate combination part 15, so the swash plate combination part 15 can generate a reaction force, and the radial component force generated by the reaction force enables the cylinder body combination part to generate torque due to the angular relation between the plunger part and the swash plate part 15, so that the cylinder assembly rotates, the cylinder assembly is connected with the main shaft 17 through a spline, therefore, the main shaft 17 rotates along with the cylinder assembly, thereby realizing the output of the rotating speed and the torque, when the hydraulic pump works reversely, the hydraulic motor 1 also works reversely, when the hydraulic motor 1 is started, the brake should be released firstly, specifically, the brake is acted inside the brake ring 6 through the pilot pressure, the upward force is generated to overcome the acting force generated by the brake spring 5, thereby the brake ring 6 moves upwards, the brake rubber sheet 7 is separated from the brake steel sheet 8, no friction force exists between the brake rubber sheet 7 and the spline housing 9, thereby the spline housing 9 sleeved outside the main shaft 17 is not stressed, the hydraulic motor 1 releases the brake, when the hydraulic motor 1 stops rotating, the pilot pressure for releasing the brake is closed, the spring force acts on the brake ring 6, the brake ring 6 acts on the brake rubber sheet 7 and the brake steel sheet 8, the friction force of the two products is transmitted to the main shaft 17, so that the braking force of the products is changed when the hydraulic motor 1 needs to be switched from large displacement to small displacement: the variable displacement control pilot pressure is communicated and acts on the left side of the variable displacement control valve core to push the compression spring to move rightwards, hydraulic oil in the spring cavity enters the inner cavity of the shell 21 through the oil drain port 34, at the moment, the hydraulic oil at the oil inlet and the oil outlet of the motor passes through two throttling oil nozzles 33, the high-pressure side of the one-way valve 32 is opened preferentially, the hydraulic oil acts on the variable piston 16 through an oil duct to push the variable piston 16 to move upwards to generate an arm of force so as to push the swash plate assembly 15 to rotate, so that the displacement of the motor is changed, when the motor is switched from small displacement to large displacement, the variable displacement control pilot pressure is closed, the variable displacement control valve core moves leftwards under the action of spring force to reach a limit position, at the moment, liquid in the variable piston 16 is communicated with the oil drain port 34 through the one-way valve 32 and the two throttling oil nozzles 33, the variable piston 16 moves downwards under the action of the swash plate assembly 15, and the swash plate assembly 15 is restored to an initial angle, the displacement switching of the motor is realized, when the oil inlet and the oil outlet of the hydraulic motor 1 pass through high-pressure oil, the flushing valve core 31 is moved to the low-pressure side by overcoming the spring force by pressure, the low-pressure side pressure oil is led to the position of the check valve 32 core, when the oil supplementing pressure of the system is greater than the opening pressure of the check valve 32, the check valve 32 is opened, the low-pressure side oil of the hydraulic motor 1 enters the inner cavity of the motor to be flushed and cooled, the opening pressure of the flushing valve core 31 can be customized according to the requirements of customers, the output rotating speed of the motor is transmitted to the first-stage speed reducing part 27 through a spline, the first-stage speed reducing part 27 transmits the rotating speed to the second-stage speed reducing part 26 through the spline connection, finally, the reduction of the rotating speed and the amplification of torque are realized through the gear ring 23, the multifunctional effect is realized, the problems of single function and poor applicability of the existing open type hydraulic system are solved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A hydraulic drive device suitable for closed system, includes hydraulic motor (1) and reduction gears (2), its characterized in that: the left bottom of the inner cavity of the hydraulic motor (1) is provided with a valve body combination mechanism (3), the left top of the inner cavity of the hydraulic motor (1) is provided with an end cover (4), the left side of the inner cavity of the hydraulic motor (1) is provided with a brake spring (5), the inner cavity of the hydraulic motor (1) and the position corresponding to the brake spring (5) are provided with a brake ring (6), the inner side of the brake ring (6) is provided with a brake rubber sheet (7), the inner side of the brake ring (6) is provided with a brake steel sheet (8), the inner side of the brake ring (6) is provided with a spline sleeve (9), the top of the hydraulic motor (1) is provided with a sealing plug (10) through threads, the inner cavity of the hydraulic motor (1) is provided with a framework oil seal (11), the inner cavity of the hydraulic motor (1) and the position corresponding to the framework oil seal (11) are provided with a bearing (12), the oil distribution disc (13) is arranged in the inner cavity of the hydraulic motor (1) and in a position corresponding to the bearing (12), a cylinder body assembly (14) is arranged in the inner cavity of the hydraulic motor (1) and in the right side corresponding to the oil distribution disc (13), a swash plate assembly (15) is arranged at the bottom of the right side of the inner cavity of the hydraulic motor (1), a variable piston (16) is arranged on the right side of the inner cavity of the hydraulic motor (1), and a main shaft (17) is arranged on the right side of the inner cavity of the hydraulic motor (1).
2. A hydraulic drive for a closed system according to claim 1, wherein: the valve body combination mechanism (3) comprises a flushing valve core (31), a one-way valve (32) is arranged at the bottom of the flushing valve core (31), and a throttling oil nozzle (33) and an oil drainage port (34) are arranged on two sides of the one-way valve (32).
3. A hydraulic drive for a closed system according to claim 1, wherein: reduction gears (2) include casing (21), the right side of casing (21) is provided with floating oil seal (22), the right side of casing (21) inner chamber is provided with ring gear (23), the right side of casing (21) inner chamber is provided with angular contact ball bearing (24), the right side of casing (21) inner chamber is provided with lock nut (25), the right side of casing (21) inner chamber is provided with second grade speed reduction part (26), the right side of casing (21) inner chamber is provided with one-level speed reduction part (27), the right side of casing (21) inner chamber is provided with end cover subassembly (28).
4. A hydraulic drive for a closed system according to claim 1, wherein: the material of sealed plug (10) is cast iron, sealed plug (10) uses with hydraulic motor (1) cooperation.
5. A hydraulic drive for a closed system according to claim 1, wherein: the hydraulic motor (1) is LTM04VB in model, and the hydraulic motor (1) is made of aluminum alloy.
6. A hydraulic drive for a closed system according to claim 1, wherein: the brake spring (5) is made of alloy steel, and the brake spring (5) is matched with the brake ring (6) for use.
7. A hydraulic drive for a closed system according to claim 1, wherein: the bearing (12) is made of steel, and the bearing (12) is annular.
8. A hydraulic drive for a closed system according to claim 1, wherein: the main shaft (17) is made of bearing steel, and the main shaft (17) is matched with the hydraulic motor (1) for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110896309.3A CN113464356A (en) | 2021-08-05 | 2021-08-05 | Hydraulic driving device suitable for closed system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110896309.3A CN113464356A (en) | 2021-08-05 | 2021-08-05 | Hydraulic driving device suitable for closed system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113464356A true CN113464356A (en) | 2021-10-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110896309.3A Pending CN113464356A (en) | 2021-08-05 | 2021-08-05 | Hydraulic driving device suitable for closed system |
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| Country | Link |
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| CN (1) | CN113464356A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115839357A (en) * | 2023-02-10 | 2023-03-24 | 青岛力克川液压机械有限公司 | Delay brake control valve for hydraulic rotary motor |
| CN116025707A (en) * | 2022-12-29 | 2023-04-28 | 青岛力克川液压机械有限公司 | Hydraulic braking reduction gearbox device for motor |
-
2021
- 2021-08-05 CN CN202110896309.3A patent/CN113464356A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116025707A (en) * | 2022-12-29 | 2023-04-28 | 青岛力克川液压机械有限公司 | Hydraulic braking reduction gearbox device for motor |
| CN115839357A (en) * | 2023-02-10 | 2023-03-24 | 青岛力克川液压机械有限公司 | Delay brake control valve for hydraulic rotary motor |
| CN115839357B (en) * | 2023-02-10 | 2024-01-12 | 青岛力克川液压机械有限公司 | Delay brake control valve for hydraulic rotary motor |
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