CN210118226U - Non-shell tandem non-circular planetary gear hydraulic motor - Google Patents

Abstract

The utility model relates to a no casing serial-type non-circular planetary gear hydraulic motor, it is mainly including installing in proper order in output shaft through lid, preceding cavity, valve plate, ring gear, planetary gear, sun gear, rear cavity, baffle, back lid. The main parts are connected and fixed in series through bolts at the end of the transparent cover. The liquid inlet and the liquid outlet are respectively and radially arranged on the front cavity and the rear cavity, when the flow directions are opposite, the reverse rotation function with the same power as the forward rotation can be realized, and the relative direction of the liquid inlet and the liquid outlet can be adjusted. The inner gear ring and the central gear of the core part are made of precipitation hardening stainless steel and are subjected to strengthening treatment, the planetary gear is made of a high-strength copper alloy material, and the valve plate is made of a high-hardness wear-resistant cermet material, so that the motor has the advantages of simple structure, few parts, low cost, reliable operation, wear resistance, corrosion resistance and long service life, and hydraulic oil or high-water-base emulsion can be used as a working medium.

Description

Non-shell tandem non-circular planetary gear hydraulic motor

Technical Field

The utility model relates to a hydraulic motor technical field, concretely relates to use non-circular planetary gear mechanism as basic operating principle, can use high water base emulsion or hydraulic oil as working medium's big moment of torsion hydraulic motor of low-speed.

Background

The hydraulic motor can convert the hydraulic pressure energy into mechanical energy as an executing element of a hydraulic system, the mechanical energy is output in the form of torque and rotating speed of a main shaft and then directly driven to work through a speed reducer, the non-circular planetary gear hydraulic motor is a novel low-speed large-torque hydraulic motor, the non-circular planetary gear hydraulic motor utilizes the change characteristics of the position and the volume of a working cavity formed between two adjacent planetary gears and an inner gear ring and a central gear in the meshing rotation process of the non-circular planetary gears, the working cavity is communicated with a liquid inlet hole when the volume of the working cavity is minimum, high-pressure oil acts on a tooth surface to generate radial force to push the planetary gears and the central gear to rotate and output torque rotating speed, the volume of the working cavity is gradually increased along with the change of the position of the working cavity in the rotation process, the working cavity is isolated from the liquid inlet hole and communicated with a liquid outlet, the volume of the working cavity is gradually reduced, oil is discharged through the liquid discharge hole, and when the working cavity is rotated to the position with the minimum volume, the oil is disconnected with the liquid discharge hole and communicated with the liquid inlet hole, and the operation is repeated. Compared with the traditional radial plunger type, crankshaft connecting rod type and cycloid type hydraulic motors, the hydraulic motor has the advantages of few parts, small volume, low manufacturing cost, easiness in processing and assembly, convenience in use and maintenance and convenience in maintenance, has higher mechanical efficiency, volumetric efficiency, starting torque efficiency and pollution resistance, and can directly drive machinery, so that the hydraulic motor has a very wide application prospect in the fields of injection molding machinery, engineering machinery, coal mine machinery, metallurgical machinery, ship machinery, petrochemical industry and the like.

Disclosure of Invention

The utility model aims at providing a simple structure, work efficiency height, long service life, production and maintenance cost are low, the range of application is wide, can realize the general non-circular planetary gear hydraulic motor of oil emulsion of the big moment of torsion output of low-speed.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the shell-free serial non-circular planetary gear hydraulic motor adopts a shell-free serial integral structure and comprises a transparent cover, a front bearing, a front cavity, a valve plate, an inner gear ring, a planetary gear, a central gear, a rear cavity, a rear bearing, a baffle and a rear cover which are sequentially arranged on an output shaft. An oil seal is also arranged between the transparent cover and the output shaft, the connecting end surfaces of the front cavity, the inner gear ring, the rear cavity and the valve plate are all provided with a rubber sealing ring and a positioning pin and are connected and fastened together through a group of high-strength bolts at the transparent cover end, the sizes of the front and rear valve plates are consistent, a group of cylindrical pins are used for realizing radial positioning with the inner gear ring, the front cavity and the rear cavity respectively, the valve plate at the rear end is reversely arranged to keep the staggered position of the front and rear valve plates, the semicircular groove of the output shaft is axially matched with the semicircular boss of the central gear and the inner hole of the metal wear-resistant sealing ring in a sliding way and transmits rotating torque, and the metal wear-resistant sealing ring forms high-pressure end surface rotating, the rear end of the output shaft is provided with a baffle plate to fix the positions of a shaft shoulder and a bearing and bear corresponding axial load. The rear cover is connected and fixed on the rear cavity by a group of screws. When the flow directions of the liquid inlet and the liquid outlet are opposite, the reverse rotation function with the same power as the forward rotation of the motor can be realized.

As the utility model discloses a further improvement, inlet, leakage fluid dram set up respectively alone in the front on cavity and back cavity, and the drill way direction is radial to be arranged, can be according to syntropy, reverse or become specific contained angle installation.

As the further improvement of the utility model, the inner gear ring and the central gear are made of precipitation hardening stainless steel, the planetary gear is made of high-strength copper alloy material and is subjected to strengthening treatment, and the valve plate is produced by using metal ceramic material.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:

the utility model has the advantages of simple integral structure, low production and maintenance cost, flexible installation and adjustment and wide application range. The non-circular planetary gear mechanism has the advantages of being reliable in work, long in service life and high in efficiency, the shell-free tandem type structure has the advantages of being smaller in size and fewer in parts compared with a traditional integral shell type hydraulic motor, machining and assembling quality can be guaranteed on the premise that parts and machining precision requirements are effectively reduced, meanwhile, design and production of series products of similar specifications are facilitated, products of different performance parameter specifications can be formed within a certain range only by using non-circular planetary gear assemblies of different specifications and output shafts, and the types of parts of the series products are effectively reduced. The precipitation hardening stainless steel, copper alloy and cermet materials adopted by the non-circular planetary gear assembly and the valve plate have the characteristics of wear resistance, corrosion resistance and high strength, can meet the requirement of using high-water-based emulsion for working for a long time while using hydraulic oil, and further reduce the working noise of the planetary gear made of the copper alloy materials.

Drawings

In order to more clearly illustrate the specific embodiment or technical solution of the present invention, the following drawings to be used are briefly introduced, and it should be noted that the drawings are all the embodiments of the present invention based on a 46-type non-circular planetary gear train, obviously according to the present invention, the features can also obtain drawings of other types calculated according to the disclosed calculation formula, and the other types refer to non-circular planetary gear trains conforming to the condition that the planetary gear is a spur gear, a ring gear and a sun gear are high-order elliptic gears corresponding to each other.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic top sectional structure view of the overall structure of the present invention.

Fig. 3 is a schematic diagram of a right-side sectional structure of the non-circular planetary gear train, the cylindrical pin and the metal wear-resistant sealing ring.

Wherein: 1. an output shaft; 2. a transparent cover; 2-1, motor mounting holes; 3. a front bearing; 4. a front cavity; 4-1, liquid inlet; 5. a valve plate; 5-1, distributing hole; 6. an inner gear ring; 7. a planetary gear; 8. a sun gear; 9. a rear cavity; 9-1, a liquid outlet; 10. a rear bearing; 11. a baffle plate; 12. a rear cover; 13. a metal wear-resistant sealing ring; 14. a cylindrical pin; 15. and (7) oil sealing.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the following description of the present invention with reference to the accompanying drawings and specific embodiments is provided for clarity and completeness.

As shown in the figure 1-3, the non-circular planetary gear hydraulic motor without the shell series structure is in a hexagonal cylinder shape in the whole form, the non-circular planetary gear hydraulic motor is connected through a flange at the end part of a transparent cover 2 and is tightly fixed at a position of a motor mounting hole 2-1 through a bolt, an output shaft 1 can output torque through the end part of the shaft by using connection forms such as a flat key, a spline, a thread and the like, a high-pressure oil liquid inlet 4-1 and a liquid outlet 9-1 are respectively arranged on a front cavity 4 and a rear cavity 9, the positions of the high-pressure oil liquid inlet 4-1 and the liquid outlet 9-1 are radially arranged on one side plane of the hexagonal cylinder and are respectively communicated with annular grooves in the front cavity 4 and the rear cavity 9, and the six directions of the front cavity 4 and the rear cavity 9 can be adjusted to enable the liquid inlet 4-1 and the liquid.

The core part of the shell-free series structure non-circular planetary gear hydraulic motor is a non-circular planetary gear train consisting of an inner gear ring 6, a planetary gear 7 and a sun gear 8, wherein the inner gear ring 6 is a six-step elliptic inner gear, the sun gear 8 is a four-step elliptic gear, and the planetary gear 7 is a cylindrical straight gear; two end faces of the inner gear ring 6 are respectively provided with six uniformly distributed positioning pin holes and sealing ring grooves, the inner gear ring 6 is fixedly connected with the valve plates 5 on two sides and the front cavity 4 and the rear cavity 9 through cylindrical pins 14, the transparent cover 2, the front cavity 4, the valve plates 5, the inner gear ring 6 and the rear cavity 9 are fixedly connected together through six high-strength bolts at one end of the transparent cover 2, a liquid inlet 4-1, the annular groove of the front cavity 4, six valve holes 5-1 on the valve plates 5 on two positions, the inner cavity of the inner gear ring 6, the annular groove of the rear cavity 9 and a liquid discharge port 9-1 form a communicated inner cavity, wherein the six valve holes 5-1 on the valve plates 5 on two positions are uniformly distributed, and the rear valve plate 5 is reversely mounted to enable the front valve hole 5-1 and the rear valve hole 5-1 to form an included angle of 30 degrees; a central gear 8 and ten planet gears 7 are meshed and rotate in a space formed by an inner gear ring 6 and two side thrust plates 5, two ends of an inner hole of the central gear 8 are stepped holes and are provided with metal wear-resistant sealing rings 13 with O-shaped rubber sealing rings, the end surfaces of the metal wear-resistant sealing rings 13 are tightly attached to the thrust plates 5 by virtue of the pretightening force of the O-shaped rubber sealing rings, the inner holes of the central gear 8 and the metal wear-resistant sealing rings 13 are respectively provided with six semicircular bosses and are in axial sliding fit with a semicircular groove of an output shaft 1, the central gear 8 and the metal wear-resistant sealing rings 13 synchronously rotate, two ends of the output shaft 1 are respectively matched with a front bearing 3 and a rear bearing 10 and are axially positioned by virtue of a shaft shoulder and a tail baffle plate 11 so as to bear the axial load transmitted by a shaft end, the front bearing 3 and the rear bearing 10 are respectively arranged in a front cavity body 4 and a, an oil seal 15 is arranged between the transparent cover 2 and the output shaft 1 to prevent lubricating grease from leaking, the rear cover 12 is positioned through a spigot and an end face and is fastened with the tail end of the rear cavity 9 through six screws, and the end face of the spigot of the rear cover 12 is flush with the end face of the outer ring of the rear bearing 10 to limit the axial position of the rear bearing 10.

The shell-free series structure non-circular planetary gear hydraulic motor utilizes the basic principle of the position and volume change characteristics of working chambers formed between two adjacent planetary gears 7 and an inner gear ring 6 and a central gear 8 in the meshing transmission process of the non-circular planetary gears, the space between the inner gear ring 6 and the central gear 8 is divided by ten planetary gears 7 respectively meshed with the inner gear ring 6 and the central gear 8 to form ten independent working chambers, the planetary gears 7 are displaced to generate rotation when being pushed by radial force and simultaneously push the central gear 8 to rotate around the center along the revolution of the inner gear ring 6, the positions of the working chambers continuously deviate around the center in the rotating process and generate periodic volume change, and the volume change of the adjacent working chambers is opposite; the volume of the working cavity is set to be communicated with a distributing hole 5-1 on the front distributing plate 5 and isolated from the rear when the volume of the working cavity is increased from the minimum to the maximum, and is communicated with a distributing hole 5-1 on the rear distributing plate 5 and isolated from the front when the volume of the working cavity is decreased from the maximum to the minimum; therefore, when high-pressure oil enters the annular groove of the front cavity 4 through the liquid inlet 4-1 and then enters the working cavity through the distributing hole 5-1 on the front distributing plate 5, the volume of the working cavity is minimum, the high-pressure oil acts on the tooth surface of the planet gear 7 to generate radial force to push the planet gear 7 and the central gear 8 to rotate and transmit the radial force to the output torque of the output shaft 1, the volume of the working cavity is gradually increased along with the change of the position of the working cavity in the rotating process, when the working cavity reaches the position with the maximum volume, the working cavity is isolated from the front distributing hole 5-1 and communicated with the rear distributing hole 5-1, simultaneously the gear continues to rotate under the pressure action of the adjacent working cavity, the volume of the working cavity is gradually reduced, the oil passes through the annular groove of the rear cavity 9 and the liquid discharge hole 9-1 after passing through the rear distributing hole 5-1 and is disconnected from the rear distributing hole 5-1 when the, is communicated with the front distributing hole 5-1; the operation is repeated, so that the motor can continuously output torque and rotating speed; when the direction of the high-pressure oil liquid flowing through the liquid inlet 4-1 and the liquid outlet 9-1 is opposite, the motor can output reverse torque and rotating speed.

Claims (5)

1. There is not casing serial-type non-circular planetary gear hydraulic motor, its characterized in that: the shell-free serial non-circular planetary gear hydraulic motor adopts a serial structure without an integral shell and comprises a transparent cover (2), a front bearing (3), a front cavity (4), a valve plate (5), an inner gear ring (6), a planetary gear (7), a central gear (8), a rear cavity (9), a rear bearing (10), a baffle plate (11) and a rear cover (12) which are sequentially arranged on an output shaft (1); the oil seal (15) and the motor mounting hole (2-1) are formed in the transparent cover (2), the end faces, adjacent to the valve plate (5), of the front cavity (4), the inner gear ring (6), the rear cavity (9) are provided with sealing ring grooves and positioning pin holes, are positioned by a group of cylindrical pins (14) and sealed by O-shaped rubber rings, and are fixedly connected through a group of high-strength bolts at one end of the transparent cover (2), the valve plate (5) is divided into two parts, and the two parts are arranged on two sides of the inner gear ring (6) and are reversely arranged on one valve plate (5) located on the rear side.

2. The tandem non-circular planetary gear hydraulic motor without a housing of claim 1, wherein: sealing ring grooves and a group of uniformly distributed positioning pin through holes are formed in two end faces of the inner gear ring (6); the hole of sun gear (8) is equipped with a set of axial semi-circular boss, and the hole both ends are equipped with the step hole, and both ends step hole department is equipped with respectively takes O type rubber seal's metal wear seal ring (13), the hole of metal wear seal ring (13) is equipped with the axial semi-circular boss unanimous with sun gear (8) hole, the semi-circular boss of sun gear (8) and metal wear seal ring (13) hole and the axial semicircular groove on output shaft (1) are axial sliding fit and keep synchronous revolution.

3. The tandem non-circular planetary gear hydraulic motor without a housing of claim 1, wherein: the flow distribution plate (5) is provided with a group of flow distribution holes (5-1) corresponding to the non-circular planetary gear train and a cylindrical pin positioning hole, the position of each flow distribution hole and the position of each positioning pin hole keep an included angle corresponding to the non-circular planetary gear train, and the flow distribution plate (5) at the rear end is reversely arranged and keeps the positions of the front flow distribution hole and the rear flow distribution hole staggered (5-1).

4. The tandem non-circular planetary gear hydraulic motor without a housing of claim 1, wherein: liquid inlets (4-1) and liquid outlets (9-1) are respectively arranged on the plane of one side of the front cavity (4) and the plane of one side of the rear cavity (9), annular grooves communicated with the liquid inlets (4-1) and the liquid outlets (9-1) are respectively arranged on the end faces adjacent to the flow distribution plate (5), the annular grooves are communicated with the flow distribution holes (5-1) of the two flow distribution plates (5), and the directions of the orifices of the liquid inlets (4-1) and the liquid outlets (9-1) can be adjusted according to the same direction, the reverse direction or a specific included angle during assembly.

5. The tandem non-circular planetary gear hydraulic motor without a housing of claim 1, wherein: the inner gear ring (6) and the central gear (8) are made of precipitation hardening stainless steel materials with high strength, high wear resistance and corrosion resistance and are subjected to strengthening treatment, the planet gear (7) is made of a high-strength copper alloy material and is subjected to strengthening treatment, and the valve plate (5) is made of a metal ceramic material.

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