CN210290001U - Piston assembly in tilt cylinder hydraulic motor - Google Patents

Abstract

The piston assembly comprises a piston cylinder and a piston column which are sleeved together, one end of the piston assembly is matched with the surface of the crankshaft part, and the other end of the piston assembly is provided with a ball seat which is fixed in the cylinder cover and can rotate relative to the cylinder cover; two oil paths are arranged in the cylinder body and the cylinder cover, and an oil port is arranged at the top of the ball seat and is communicated with the piston cavity through a ball seat channel; the openings of the two oil paths towards the ball seat are respectively positioned at two sides of the oil port, and one of the two oil paths is communicated with one of the two oil paths in the rotating process of the ball seat. The utility model changes the oil distribution mode of the hydraulic motor by changing the structure of the oil circuit in the hydraulic motor, innovatively adopts the structure of double oil circuits, and the two oil circuits are respectively used for oil inlet and oil outlet, so that the operation of the motor is simpler; meanwhile, due to the arrangement of the oil grooves and the annular oil grooves, the lubricating and cooling effects between the friction pairs are good, the mechanical efficiency is high, and the service life of the whole equipment is long.

Description

Piston assembly in tilt cylinder hydraulic motor

Technical Field

The utility model belongs to the technical field of motor equipment, concretely relates to piston assembly among tilt cylinder hydraulic motor.

Background

Hydraulic motors are transmission devices for realizing hydraulic-mechanical energy conversion, are widely applied in various industries, and are well known and common by people. The hydraulic motors are various, and among them, a crankshaft connecting rod type five-star hydraulic motor is one of them. There are more crankshaft connecting rod hydraulic motor among the prior art, if: chinese patent No. CN1189673C discloses a crankshaft connecting rod type hydraulic motor, in which the general structure of such a hydraulic motor is disclosed.

The crankshaft connecting rod type hydraulic motor is an actuating element for converting hydraulic energy into mechanical energy, generally, the hydraulic motor comprises a shell, an oil guider, an oil distributor, a piston connecting rod assembly and a crankshaft, one end of the crankshaft coaxially rotates with the oil distributor through a double-end structure, piston cylinders are uniformly arranged on the radial periphery of the crankshaft, and pistons in the piston cylinders are connected with a connecting rod ball hinge. When the hydraulic energy conversion device is used, pressure oil enters the piston cylinder from the oil distributor and the shell, the pressure oil generates pressure to act on the top of the piston, the piston pushes the connecting rod to further push the crankshaft to rotate, and the crankshaft rotates around the crankshaft rotating center, so that hydraulic energy is converted into mechanical energy to drive a load.

The cylinder-oscillating hydraulic motor is one of crankshaft connecting rod type hydraulic motors, disc type oil distribution and shaft oil distribution are generally adopted in a traditional hydraulic motor, oil inlet and oil return are carried out in each oil cylinder through one oil way, the control mode of the oil way is more traditional, the control is more complex, for example, when the motor needs to rotate reversely, the states of a plurality of oil pumps need to be adjusted, and the operation is inconvenient.

Accordingly, the present application provides further designs and improvements to piston assemblies in prior art tilt cylinder hydraulic motors based on the above-identified problems.

SUMMERY OF THE UTILITY MODEL

To not enough among the above prior art, the utility model provides a piston assembly among tilt cylinder hydraulic motor through the change to oil circuit structure among the piston assembly, has changed hydraulic motor's the mode of joining in marriage oil, makes the operation of motor simpler, and the lubrication and cooling effect between the friction is vice is good, and mechanical efficiency is high.

In order to solve the above technical problem, the present invention solves the above technical problems.

The piston assembly comprises a piston cylinder and a piston column which are sleeved together, one end of the piston assembly is matched with the surface of the crankshaft part, and the other end of the piston assembly is provided with a ball seat which is fixed in the cylinder cover and can rotate relative to the cylinder cover; two oil paths are arranged in the cylinder body and the cylinder cover, and an oil port is arranged at the top of the ball seat and is communicated with the piston cavity through a ball seat channel; the openings of the two oil paths towards the ball seat are respectively positioned at two sides of the oil port, and one of the two oil paths is communicated with one of the two oil paths in the rotating process of the ball seat.

The traditional hydraulic motor generally adopts disc type oil distribution or shaft oil distribution, the oil path is single, and the control is not flexible enough. In the hydraulic motor in this application, adopted the design of two oil circuits, and one of them oil circuit of piston chamber only can alternative intercommunication. During operation, carry out self-adaptation distribution of oil through the rotation of ball seat, if: for each oil way and each piston assembly, when the crankshaft assembly rotates from 0-180 degrees, high-pressure oil enters the piston cavity from the oil way on one side, and when the crankshaft assembly continues to rotate to 180-360 degrees, the hydraulic oil in the piston assembly returns from the oil way on the other side. And, the direction of business turn over hydraulic fluid port is changed, and motor rotation direction will corresponding change, convenient operation and flexibility are high.

In a preferred embodiment, the piston assembly has an arc surface with an oil groove on the arc surface, and the oil groove is provided with an oil groove through hole which communicates the oil groove and the piston cavity. In this structure, the surface cooperation of piston assembly and crankshaft portion is smooth and easy, and high pressure oil can enter into the oil groove through-hole, realizes the effect that the static pressure supported, and is lubricated effectual, is showing the reduction friction, has improved mechanical efficiency.

In a preferred embodiment, in the piston assembly, the piston cylinder is arranged on one side close to the crankshaft part, and the oil groove through hole are arranged at the bottom of the piston cylinder; the piston column is arranged on one side close to the cylinder cover, and the ball seat is arranged at the top of the piston column.

In a preferred embodiment, the inner wall of the piston cylinder is provided with a sealing ring, so that the sealing performance of the piston assembly in the telescopic motion process is good.

In a preferred embodiment, a plurality of annular oil grooves are formed in the inner wall of the piston cylinder and used for storing oil and playing a good lubricating role.

In a preferred embodiment, the ball seat is limited in the cylinder cover through the snap ring, so that the limiting rotation fit between the ball seat and the cylinder cover is guaranteed, and the ball seat is prevented from being separated.

In a preferred embodiment, the bottom of the piston assembly is provided with a convex edge, the outer end of the crankshaft part is provided with a clamping ring, and the clamping ring clamps the convex edge so as to limit the piston assembly and ensure the harmony and stability of the whole structure when the motor works.

Compared with the prior art, the utility model discloses following beneficial effect has: the piston assembly in the tilt cylinder hydraulic motor is provided, the oil distribution mode of the hydraulic motor is changed by changing the structure of the oil way in the hydraulic motor, a double-oil-way structure is innovatively adopted, and the two oil ways are respectively used for oil inlet and oil outlet, so that the operation of the motor is simpler; meanwhile, due to the arrangement of the oil grooves and the annular oil grooves, the lubricating and cooling effects between the friction pairs are good, the mechanical efficiency is high, and the service life of the whole equipment is long.

Drawings

Fig. 1 is a first perspective view of a motor according to the present application.

Fig. 2 is a second perspective view of the motor in the present application.

Fig. 3 is a perspective view of the motor of the present application with the cylinder head omitted.

Fig. 4 is a perspective view of a housing in the motor of the present application.

Fig. 5 is a first perspective view of a bearing cap of the present application.

Fig. 6 is a second perspective view of the bearing cap of the present application.

FIG. 7 is a perspective view of a crankshaft assembly and piston assembly of the present application.

FIG. 8 is an elevation view of a crankshaft assembly and piston assembly of the present application in cooperation.

Fig. 9 is a perspective view of the cylinder head in the present application.

Fig. 10 is a schematic view of a cylinder head in the present application.

Fig. 11 is a perspective view of a crankshaft assembly in the present application.

Fig. 12 is a first perspective view of the piston assembly of the present application in cooperation with a cylinder head.

Fig. 13 is a second perspective view of the piston assembly of the present application in cooperation with a cylinder head.

FIG. 14 is a cross-sectional view of a piston assembly of the present application in cooperation with a cylinder head.

Fig. 15 is a perspective view of a piston assembly of the present application.

Fig. 16 is a perspective view one of a piston cylinder in the piston assembly of the present application.

Fig. 17 is a second perspective view of a piston cylinder in the piston assembly of the present application.

Fig. 18 is a perspective view of a piston post in the piston assembly of the present application.

Fig. 19 is a perspective view of a tee in the present application.

Fig. 20 is a cross-sectional view of the hydraulic motor of the present application.

Fig. 21 is a sectional view of the hydraulic motor in the present application.

Fig. 22 is a sectional view of the hydraulic motor in the present application.

Fig. 23 is a cross-sectional view of the hydraulic motor in the present application.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not construed as limiting the present invention, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

In the description of the present invention, it is to be understood that the term: the center, vertically, transversely, length, width, thickness, upper and lower, preceding, back, left and right, vertical, level, top, end, inside and outside, clockwise, anticlockwise etc. indicate position or positional relationship for based on the position or positional relationship that the drawing shows, just for the convenience of description the utility model discloses and simplified description, consequently can not be understood as the restriction of the utility model. Furthermore, the terms: first, second, etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features shown. In the description of the present invention, unless explicitly stated or limited otherwise, the terms: mounting, connecting, etc. should be understood broadly, and those skilled in the art will understand the specific meaning of the terms in this application as they pertain to the particular situation.

Referring to fig. 1 to 23, in the present invention, a tilt cylinder hydraulic motor and a piston assembly thereof, the hydraulic motor may specifically be a five-star hydraulic motor, and includes a housing 1, a plurality of cylinder bodies 2 are uniformly distributed on the housing 1, a cylinder cover 21 is fixed to an outer end of each cylinder body 2 through a bolt 211, a crankshaft assembly 3 is disposed in the housing 1, and a crankshaft portion 31 of the crankshaft assembly 3 is disposed in the housing 1 and sealed by a bearing cover 4; wherein, the outer side of the crankshaft part 31 is evenly distributed with piston components corresponding to the number of the cylinder bodies 2.

In the present application, the piston assembly includes a piston cylinder 6 and a piston post 61 that are sleeved together, one end of the piston assembly is matched with the surface of the crankshaft 31, and the other end of the piston assembly is provided with a ball seat 66, and the ball seat 66 is fixed in the cylinder head 21 and can rotate relative to the cylinder head 21; two oil passages 27 are arranged in the cylinder body 2 and the cylinder cover 21, an oil port 662 is arranged at the top of the ball seat 66, and the oil port 662 is communicated with the piston cavity 68 through a ball seat channel 663; the openings of the two oil passages 27 facing the ball seat 66 are respectively positioned at two sides of the oil port 662, and one of the two oil passages 27 is communicated with one of the two oil passages 66 during the rotation process of the ball seat 66; the piston assembly has the cambered surface with crankshaft 31's surface complex tip, is equipped with oil groove 62 on this cambered surface, be equipped with oil groove through-hole 63 in the oil groove 62, this oil groove through-hole 63 intercommunication oil groove 62 and piston chamber 68.

In the hydraulic motor according to the embodiment of the present application, in the piston assembly, the piston cylinder 6 is disposed on a side close to the crankshaft 31, and the oil groove 62 and the oil groove through hole 63 are disposed at the bottom of the piston cylinder 6; the piston post 61 is disposed on a side close to the cylinder head 21, and the ball seat 66 is disposed on a top portion of the piston post 61. The inner wall of the piston cylinder 6 is provided with a sealing ring 611, so that the sealing performance of the piston assembly in the telescopic motion process is good; in addition, be equipped with multichannel annular oil groove 65 on the inner wall of piston cylinder 6 for the oil storage also plays fine lubricated effect.

In the embodiment of this application, ball seat 66 passes through snap ring 661 restriction in cylinder cap 21, guarantees spacing normal running fit between the two, avoids deviating from. Meanwhile, the bottom of the piston assembly is provided with a convex edge 601, the outer end of the crankshaft part 31 is provided with a clamping ring 321, and the clamping ring 321 clamps the convex edge 601 to limit the piston assembly, so that the stability of the whole structure of the motor during working is ensured.

In addition, in the present application, an eccentric hole 312 is provided on the eccentric structure of the crankshaft 31. In this structure, through the setting of eccentric orfice, can alleviate the weight of eccentric structure on the crankshaft portion, reduce the eccentric power when moving, guarantee motor during operation overall structure's harmony and stability.

In an embodiment of the present application, the periphery of the oil port 662 on the ball seat 66 is provided with a plurality of oil port slots 669, preferably 18 to 22, radially distributed outward and centered around the oil port center. In this structure, under the condition of high-speed operation of the motor, the oil trap phenomenon cannot occur when the oil inlet and outlet of the motor are switched by the plurality of oil port grooves 669, and meanwhile, the starting impact phenomenon of the motor can be avoided, and noise can be reduced. Further, the oil port grooves 669 can store hydraulic oil, which can lubricate and cool the concave-convex spherical pair on the ball seat 66 in response to the swing of the piston.

Further, in the present application, the two oil passages 27 in each of the cylinder block 2 and the cylinder head 21 communicate with the first oil passage 711 and the second oil passage 721 in the housing side plate 7, respectively, the first oil passage 711 and the second oil passage 721 are both annular passages, and are provided in the side plate 7 one after another, one large and one small, wherein the first oil passage 711 communicates with one oil passage 27 in the cylinder block 2 through the first branch pipe 712, and the second oil passage 721 communicates with the other oil passage 27 in the cylinder block 2 through the second branch pipe 722. In addition, the first oil passage 711 and the second oil passage 721 are externally connected to equipment through the oil holes 701 and 702 respectively for oil supply, so that the structure is simple, and the hydraulic control is convenient.

The hydraulic motor in the present application generally operates as follows: in operation, the oil path 27 on the motor is connected to the hydraulic oil pump through the first oil passage 711 and the second oil passage 721 for supplying oil. In the operation process, the hydraulic oil pump supplies oil to the piston assembly from one of the oil passages 27, high-pressure oil in the piston cavity is increased, the piston is pushed to do work, and then the crankshaft assembly is pushed. This in-process bent axle rotates, and ball seat 66 also rotates in cylinder cap 21 simultaneously, and the rotation in-process, the connection of ball seat 66 and the oil circuit of oil feed is closed, and with another way oil circuit switch-on simultaneously, the piston is compressed this moment, and hydraulic oil in the piston chamber flows out from another way oil circuit, accomplishes a circulation, and five piston assembly and oil circuit work according to the order in proper order, and the drive bent axle subassembly that can be fine rotates, realizes the output of moment of torsion. Meanwhile, when the two oil ways work reversely, the crankshaft assembly can rotate reversely conveniently, and operation is convenient.

The traditional hydraulic motor generally adopts disc type oil distribution or shaft oil distribution, the oil path is single, and the control is not flexible enough. In the hydraulic motor in this application, adopted the design of two oil circuits, and one of them oil circuit of piston chamber only can alternative intercommunication. In operation, the self-adaptive oil distribution is carried out through the rotation of the ball seat 66, such as: for each oil way and each piston assembly, when the crankshaft assembly rotates from 0-180 degrees, high-pressure oil enters the piston cavity from the oil way on one side, and when the crankshaft assembly continues to rotate to 180-360 degrees, the hydraulic oil in the piston assembly returns from the oil way on the other side. And, the direction of business turn over hydraulic fluid port is changed, and motor rotation direction will corresponding change, convenient operation and flexibility are high.

In addition, in this application, the surface cooperation of piston assembly and crankshaft 31 is smooth and easy, and high-pressure oil can enter into oil groove 62 through oil groove through-hole 63, realizes the effect that the static pressure supported, and lubricated effectual is showing the friction reduction, has improved mechanical efficiency.

The above can be seen that the utility model provides an improved tilt cylinder hydraulic motor, through to the change of hydraulic motor oil circuit structure, changed hydraulic motor's the oil distribution mode, the innovative structure that adopts two oil circuits, two oil circuits are used for oil feed and oil outlet respectively, make the operation of motor simpler; simultaneously through the setting of oil groove 62, annular oil groove 65, make the lubricated cooling effect between the friction pair good, mechanical efficiency is high, the whole long service life of equipment.

The protection scope of the present invention includes but is not limited to the above embodiments, the protection scope of the present invention is subject to the claims, and any replacement, deformation, and improvement that can be easily conceived by those skilled in the art made by the present technology all fall into the protection scope of the present invention.

Claims (7)

1. The piston assembly in the tilt cylinder hydraulic motor is characterized by comprising a piston cylinder (6) and a piston column (61) which are sleeved with each other, wherein one end of the piston assembly is matched with the surface of a crankshaft part (31), the other end of the piston assembly is provided with a ball seat (66), and the ball seat (66) is fixed in a cylinder cover (21) and can rotate relative to the cylinder cover (21);

the cylinder swinging hydraulic motor is provided with a cylinder body (2), two oil passages (27) are arranged in the cylinder body (2) and a cylinder cover (21), an oil port (662) is arranged at the top of the ball seat (66), and the oil port (662) is communicated with a piston cavity (68) through a ball seat channel (663); the openings of the two oil passages (27) facing the ball seat (66) are respectively positioned at two sides of the oil port (662), and one of the two oil passages (27) is communicated with one of the two oil passages (27) in the rotating process of the ball seat (66).

2. Piston assembly in a tilt cylinder hydraulic motor according to claim 1, characterized in that the end of the piston assembly engaging the surface of the crankshaft part (31) has an arc surface provided with an oil groove (62), and that the oil groove (62) is provided with an oil groove through hole (63), and that the oil groove through hole (63) communicates the oil groove (62) with the piston chamber (68).

3. The piston assembly in the tilt cylinder hydraulic motor according to claim 2, wherein, in the piston assembly, the piston cylinder (6) is arranged at one side close to the crankshaft part (31), and the oil groove (62) and the oil groove through hole (63) are arranged at the bottom of the piston cylinder (6); the piston column (61) is arranged on one side close to the cylinder cover (21), and the ball seat (66) is arranged at the top of the piston column (61).

4. A piston assembly in a tilt cylinder hydraulic motor according to claim 3, characterized in that the piston cylinder (6) is provided with a sealing ring (611) on its inner wall.

5. A piston assembly in a tilt cylinder hydraulic motor according to claim 3, characterized in that the piston cylinder (6) is provided with a plurality of annular oil grooves (65) on its inner wall.

6. The piston assembly in a tilt cylinder hydraulic motor according to claim 1, characterized in that the ball seat (66) is restrained in the cylinder head (21) by a snap ring (661).

7. The piston assembly in the tilt cylinder hydraulic motor according to claim 1, characterized in that the bottom of the piston assembly is provided with a protruding rim (601), the outer end of the crankshaft part (31) is provided with a collar (321), and the collar (321) catches the protruding rim (601) to restrain the piston assembly.

Images