CN219081766U

CN219081766U - Crankshaft type radial plunger motor

Info

Publication number: CN219081766U
Application number: CN202223548219.4U
Authority: CN
Inventors: 黄素平; 姜剑平; 阮金勇
Original assignee: Ningbo Zheli Hydraulic Technology Co ltd
Current assignee: Ningbo Zheli Hydraulic Technology Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-05-26
Anticipated expiration: 2032-12-29

Abstract

The utility model discloses a crankshaft type radial plunger motor which comprises a shell, a sealing cover and an oil passing disc, wherein five plunger cavities and a sealing cover for sealing the plunger cavities are radially distributed on the shell, a plunger is matched in each plunger cavity, a connecting rod is arranged on each plunger, an eccentric shaft is arranged in the shell through a lower bearing, a bearing sleeve is arranged on the eccentric shaft through a roller, all the connecting rods are movably arranged on the bearing sleeve, the sealing cover is connected with the eccentric shaft through an upper bearing and is arranged in the shell, two oil ports are arranged on the oil passing disc, an oil distributing disc and a copper pad block are arranged in the oil passing disc, one end of the eccentric shaft penetrates through the sealing cover, and the other end of the eccentric shaft is connected with the oil distributing disc through a double-head key. The plane oil distribution structure is formed by the oil distribution disc and the copper pad, the reliability is good, the leakage amount is small, and the structure of the eccentric shaft and the multiple pistons with lower excitation frequency is adopted, so that the oil distribution disc has the characteristic of low noise.

Description

Crankshaft type radial plunger motor

Technical Field

The utility model relates to the technical field of plunger motors, in particular to a crankshaft type radial plunger motor.

Background

At present, hydraulic motors are widely used in various engineering fields, and generally refer to energy conversion devices for outputting rotational motion and converting hydraulic energy provided by a hydraulic pump into mechanical energy, and the energy conversion devices can be divided into two main types, namely high-speed and low-speed according to the rated rotation speed of the hydraulic motor. The high-speed hydraulic Ma Daji is divided into gear type, screw type and vane type, and is mainly characterized by higher rotating speed, small moment of inertia and high adjustment sensitivity; the low-speed hydraulic motor is mainly characterized by large displacement, large volume and low rotating speed, and does not need a speed reducing device. However, both types of motors adopt the cooperation between the plunger and the plunger sleeve, and the appearance volume is larger and the pressure bearing capacity is relatively weaker.

Disclosure of Invention

The utility model aims to solve the defects in the prior art, so that the crankshaft type radial plunger motor has the characteristics of low noise due to the adoption of an eccentric shaft and a multi-piston structure with lower excitation frequency; the starting torque is large, the low-speed stability is good, and the motor can stably run at a very low rotating speed; the plane compensation valve plate has good reliability and small leakage quantity, and the plunger cavity are sealed by adopting polyester materials, so that the volume efficiency is higher; the crankshaft and the connecting rod are supported by the bearing sleeve and the roller, so that the mechanical efficiency is high; the output shaft can bear certain radial and axial external forces.

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

a crankshaft type radial plunger motor comprises a shell, a sealing cover and an oil passing disc, wherein a plurality of plunger cavities and a sealing cover for sealing the plunger cavities are axially distributed on the shell, a plunger is matched in each plunger cavity, connecting rods are arranged on each plunger, an eccentric shaft is arranged in the shell through a lower bearing, a bearing sleeve is arranged on the eccentric shaft through a roller, all the connecting rods are movably arranged on the bearing sleeve, the sealing cover is connected with the eccentric shaft through an upper bearing and is arranged in the shell, two oil ports are arranged on the oil passing disc, an oil distributing disc and a copper pad block are arranged in the oil passing disc, and one end of the eccentric shaft penetrates through the sealing cover and the other end of the eccentric shaft is connected with the oil distributing disc through double-head keys. The plane oil distribution structure is formed by the oil distribution disc and the copper pad block, the reliability is good, the leakage amount is small, meanwhile, the plunger is directly matched with the shell, a novel simplified design structure of a plunger sleeve is omitted, stable operation can be completed, and the multi-piston structure with an eccentric shaft and lower excitation frequency is adopted, so that the multi-piston oil distribution structure has the characteristic of low noise. The whole structure is small in size, can run stably at a low speed and has high torque starting capability.

In the further technical improvement scheme, the middle part of one side of the oil distribution disc opposite to the copper cushion block and the end part of the eccentric shaft positioned in the shell are uniformly provided with socket grooves, and the socket grooves are inserted with the corresponding ends of the double-headed keys. The eccentric shaft and the oil distribution disc are synchronously moved by inserting the eccentric shaft and the oil distribution disc at two ends of the double-headed key respectively.

In the further technical improvement scheme, the plunger is provided with a mounting hole, one end of the connecting rod is provided with a head, and the head is inserted into the mounting hole and fixedly mounted by the clamp spring. The plunger is convenient to install through the clamp spring and the connecting rod, and has higher volumetric efficiency.

In a further technical improvement scheme, protruding limiting parts are arranged at two ends of one side of each connecting rod back to the bearing ring, two check rings are arranged between the two protruding parts, and the two check rings are respectively located at two sides of the head. The plurality of connecting rods limit the check rings through the protruding limiting parts at the two side ends, the connecting rods are hooped by the two check rings after being arranged outside the bearing sleeve, and the rotation of the eccentric shaft can be realized by utilizing the rollers between the bearing sleeve and the eccentric shaft.

In a further technical improvement, a framework oil seal is arranged on one side of the sealing cover opposite to the shell. The sealing treatment between the sealing cover and the crankshaft can be realized through the framework oil seal, so that the sealing effect of the internal working cavity is facilitated.

In a further technical improvement, the oil distribution disc is provided with a wear-resistant ring on the side close to the oil passing disc, and a plane seal is arranged between the oil passing disc and the shell. The wear-resistant ring can ensure that the wear of the oil distribution disc is reduced when the oil distribution disc synchronously rotates along with the eccentric shaft, and the plane seal is beneficial to realizing the sealing treatment between the oil distribution disc and the oil passing disc.

In a further technical improvement, the surface of the shell is provided with a nitride layer, and the plunger cavity and the plunger are sealed by adopting a polyester material. And a polyester sealing material mounting groove is distributed on the plunger cavity. The plunger and the plunger cavity are sealed by adopting polyester materials, so that the volumetric efficiency is high.

Compared with the prior art, the utility model has the following beneficial effects:

hydraulic oil enters from an oil port, passes through the oil passing disc, enters into the shell through a high-pressure runner of the oil distributing disc, pushes the plunger, and transmits thrust between the plunger and the crankshaft through the connecting rod by the bearing sleeve; and the hydraulic oil doing work is discharged from the other oil port to return to the oil tank, and if the hydraulic oil needs to be reversed, the oil inlet and outlet directions of the two oil ports are reversed.

The utility model adopts the eccentric shaft and the multi-piston structure with lower excitation frequency, thereby having the characteristic of low noise; the starting torque is large, the low-speed stability is good, and the motor can stably run at a very low rotating speed; the plane compensation valve plate has good reliability and small leakage quantity, and the plunger cavity are sealed by adopting polyester materials, so that the volume efficiency is higher; the crankshaft and the connecting rod are supported by the bearing sleeve and the roller, so that the mechanical efficiency is high; the output shaft can bear certain radial and axial external forces.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is an exploded view of the overall structure of the present utility model;

FIG. 3 is a schematic view of the front structure of the oil distribution pan of the present utility model;

FIG. 4 is a schematic view of the back side structure of the oil distribution pan of the present utility model;

FIG. 5 is a schematic view of the back structure of the housing of the present utility model;

FIG. 6 is a schematic diagram of the front structure of the housing of the present utility model;

FIG. 7 is a diagram of the connection between the eccentric shaft and the bearing housing of the present utility model;

fig. 8 is a schematic view of the overall structure of the copper pad of the present utility model.

In the figure: 10. a housing; 11. an oil port; 20. an oil pan; 21. an oil distribution tray; 22. a copper pad; 23. a double-headed key; 24. sealing the plane; 25. a wear ring; 30. a cover; 31. a framework oil seal; 40. a cover is closed; 50. a plunger cavity; 60. a plunger; 70. a connecting rod; 71. a retainer ring; 80. a lower bearing; 90. an eccentric shaft; 100. a bearing sleeve; 110. and (5) an upper bearing.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Example 1: the utility model provides a crankshaft type radial plunger motor, includes casing 10, closing cap 30 and logical food tray 20, and the axial distributes has five plunger chambeies 50 and is used for shutoff plunger 60 chamber 50's blank cap 40 on the casing 10, and every plunger 60 intracavity all cooperates with a plunger 60, all installs connecting rod 70 on every plunger 60, has laid the mounting hole on the plunger 60, and the one end of connecting rod 70 is provided with head and head socket joint in the mounting hole and by retaining ring 71 fixed mounting, every connecting rod 70 has laid protruding spacing portion on the opposite side both ends of bearing ring, installs two retaining rings 71 between two protruding spacing portions, and two retaining rings 71 are located the both sides of head respectively.

The eccentric shaft 90 is arranged in the shell 10 through the lower bearing 80, the bearing sleeve 100 is arranged on the eccentric shaft 90 through rollers, all the connecting rods 70 are movably arranged on the bearing sleeve 100, the sealing cover 30 is connected with the eccentric shaft 90 through the upper bearing 10 and is used for arranging the eccentric shaft 90 in the shell 10, the oil passing disc 20 is provided with two oil ports 11, the oil passing disc 20 is internally provided with the oil distribution disc 21 and the copper pad 22, the oil distribution disc 21 is provided with the wear-resisting ring 25 on the side close to the oil passing disc 20, and the plane seal 24 is arranged between the oil passing disc and the shell 10. The wear-resistant ring can ensure that the wear of the oil distribution disc is reduced when the oil distribution disc synchronously rotates along with the eccentric shaft, and the plane seal is beneficial to realizing the sealing treatment between the oil distribution disc and the oil passing disc.

One end of the eccentric shaft 90 penetrates through the sealing cover 30, the other end of the eccentric shaft 90 is connected with the oil passing disc 20 through the double-headed key 23, a framework oil seal 31 is arranged on one side of the sealing cover 30 opposite to the shell 10, specifically, a middle part of one side of the oil distribution disc 21 opposite to the copper cushion block 22, socket grooves are uniformly distributed on the end part of the eccentric shaft 90 positioned in the shell 10, and the socket grooves are inserted with the corresponding ends of the double-headed key 23. The outside cover of double-end key 23 is equipped with holding ring 120, and the concentricity of action of locating oil distribution disc 21 and copper pad piece 22 has the effect of righting to the double-end key simultaneously.

The surface of the shell 10 is provided with a nitriding layer, the nitriding layer is manufactured by adopting a vacuum nitriding process, and the cavity 50 of the plunger 60 and the plunger 60 are sealed by adopting a polyester material.

Hydraulic oil enters from an oil port 11, passes through the oil passing disc 20 and then enters the shell through a high-pressure flow passage of the oil distribution disc 21 to push the plunger 60 to move along the plunger cavity 50, the plunger 60 and the eccentric shaft 90 transmit thrust through the connecting rod 70 by the bearing sleeve 100, and as the roller is arranged between the bearing sleeve 100 and the eccentric shaft 90, the plunger 60 rotates the eccentric shaft 90 through the bearing sleeve 100 to enable the eccentric shaft 90 to continuously rotate to output torque, so that the process of converting hydraulic energy into mechanical energy by the hydraulic motor is realized; and the hydraulic oil doing work is discharged from the other oil port to return to the oil tank, and if the hydraulic oil needs to be reversed, the oil inlet and outlet directions of the two oil ports are reversed.

The above description is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto. The substitutions may be partial structures, devices, or method steps, or may be a complete solution. The technical proposal and the utility model concept are equivalent to or changed in accordance with the utility model, and the utility model is covered in the protection scope of the utility model.

Claims

1. The utility model provides a crankshaft type radial plunger motor, a serial communication port, including casing (10), closing cap (30) and logical food tray (20), axial distribution has five plunger chamber (50) and be used for shutoff plunger chamber (50) stifled closing cap (40) on casing (10), all cooperate in every plunger chamber (50) has a plunger (60), all install connecting rod (70) on every plunger (60), casing (10) inside installs eccentric shaft (90) through lower bearing (80), install bearing housing (100) through the roller on eccentric shaft (90), all connecting rod (70) movable mounting is on bearing housing (100), closing cap (30) connect eccentric shaft (90) and install eccentric shaft (90) inside casing (10) through upper bearing (110), it has two hydraulic fluid ports (11) to have laid on the food tray (20), it has oil distribution disc (21) and copper pad piece (22) to lead to install inside in food tray (20), one end of eccentric shaft (90) runs through closing cap (30), the other end is connected with oil distribution disc (21) through double-end key (23).

2. The crankshaft type radial plunger motor according to claim 1, wherein socket grooves are uniformly distributed on the middle part of one side of the oil distribution disc (21) opposite to the copper cushion block (22) and on the end part of the eccentric shaft (90) positioned in the shell (10), and the socket grooves are inserted into the corresponding ends of the double-headed keys (23).

3. The crankshaft type radial plunger motor according to claim 1, wherein the plunger (60) is provided with a mounting hole, one end of the connecting rod (70) is provided with a head, and the head is inserted into the mounting hole and fixedly mounted by the snap spring (72).

4. A crankshaft radial plunger motor according to claim 3, wherein each connecting rod (70) is provided with a protruding limiting part at two ends at one side of the connecting rod facing away from the bearing ring, two retaining rings (71) are arranged between the two protruding limiting parts, and the two retaining rings (71) are respectively arranged at two sides of the head part.

5. A crank-type radial plunger motor according to claim 1, wherein the cover (30) is provided with a skeleton oil seal (31) on a side opposite to the housing (10).

6. A crank-shaft radial plunger motor according to claim 1, characterized in that the oil distribution disc (21) is provided with a wear ring (25) on the oil pan (20) side, and that a planar seal (24) is arranged between the oil pan (20) and the housing (10).

7. A radial piston motor according to claim 1, wherein the surface of the housing (10) is provided with a nitride layer and the piston chamber (50) and the piston (60) are sealed with a polyester material.