JPH0634180U - Forced lubricator for trochoid pump - Google Patents

Abstract

(57) [Summary] [Purpose] To forcibly supply lubricating oil to the rotating part of a trochoid pump to prolong the life of the pump. [Configuration] Casing 10, Cover 15, and Bearing 1
Grooves 14, 17 and small holes 18, 19 are formed in 3, 16,
The lubricating oil supplied in the pump 2 is these grooves 14, 1
7 and the small holes 18, 19 are supplied. [Effect] Since the pumps are constantly lubricated during operation, the wear of their contact portions is extremely reduced, and the service life is extended. In addition, the extended service life eliminates frequent replacement of pump parts and improves work efficiency.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a trochoid pump used for forcibly supplying lubricating oil to a machine, and relates to a forced lubricating device for forcibly supplying this lubricating oil also to bearings and the like in the pump.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, in a machine that manufactures machine parts such as screws, nuts, and bolts, lubricating oil is forcibly supplied in order to maintain good operation and machining accuracy of the machine. For this reason, pumps are integrally attached to such machines to supply lubricating oil, and play an important role for the machines.

[0003]

[Problems to be solved by the device]

 However, there is a trochoid pump that is mainly used as such a pump, which has no problem in normal use, but when it is used for a long time, its performance is deteriorated due to abrasion. There was a problem such as a decrease in the machine and insufficient lubrication of the machine. Moreover, in order to solve this problem, it is necessary to frequently replace the parts of this pump, which causes problems such as long maintenance work.

The present invention was devised for the purpose of solving the above problems and providing a pump having a simple structure and a long life.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a trochoid pump that performs suction and discharge operations by a rotating body such as a rotating shaft 20 that rotates in the casing 10. A rotating rotor 22 and a cylindrical body 23 having an internal tooth, which is one more than the number of teeth formed around the rotor 22 on the outer circumference of the rotor 22, are rotatably arranged, while the rotor 22 and the cylindrical body are arranged. Ends 23 of the casing 10 are provided with grooves 14 and 17 which are long in the radial direction on the contact surface of the casing 10 with which the end surface of the rotary member 20 is in rotary contact and the contact surface of the casing 10 with the cover 15, respectively. A small hole 19 is formed in the bearing portion 16 formed in the inner wall of the casing 10, and the rotating shaft 20 is formed in the inlet 12 formed on the side of the casing 10 where one end of the rotor 22 contacts. It is obtained by forming a small hole 18 which communicates with the bearing portion 13.

[0006]

[Action]

When the machine operates, a signal also enters this pump, and the rotating shaft 20 starts to rotate by the motor 1. As a result, the rotor 22 in the casing 10 also rotates, and this rotation also rotates the cylindrical body 23. At this time, the rotor 22 is so rotated reluctant Na meshing with the internal teeth of the cylindrical body 23, the lubricating oil from the inlet 12 of the casing 10 is Ru sucked. The lubricating oil sucked in this way is pumped from the discharge port 11 and supplied to the machine. At this time, the lubricating oil is supplied from the grooves 14 and 17 of the pump 2 to the bearings 13 and 16 and returned from the small holes 18 and 19 again, so that the rotating part itself is also lubricated. become.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 4 is an overall view of the trochoid pump, and 1 is a motor. A casing 10 of a pump 2 is fixed to the motor 1, and a lubricating oil discharge port 11 formed in the casing 10 is fixed to a filter case 3 having a filter (not shown) for filtering the lubricating oil on the upper portion. Has been done. As shown in FIGS. 1 and 3, the motor 1 is provided with a rotary shaft 20, and a spline 21 is integrally fixed to the rotary shaft 20. A rotor 22 having teeth that mesh with the spline 21 meshes with the spline 21, and teeth connected to each other by arcs are formed on the outer periphery of the rotor 22. Although the spline 21 is fixed to the rotary shaft 20 to rotate the rotor 22 here, the rotor 22 may be directly fixed to the rotary shaft 20.

A cylindrical body 23 having internal teeth whose number of teeth is one more than the number of teeth on the outer circumference of the rotor 22 is arranged on the outer circumference of the rotor 22. Like the teeth of the rotor 22 described above, they are connected by an arc. Further, the center of the cylindrical body 23 is slightly deviated from the center line of the rotating shaft 20, so that the gap between the rotor 22 and the cylindrical body 23 changes as the rotor 22 rotates. Has become. The outer circumference of the cylindrical body 23 is inscribed in the casing 10 to rotate.

Further, as shown in FIGS. 1 and 2, a thin groove is formed in the first bearing portion 13 that supports the surface of the casing 10 in contact with the end surfaces of the rotor 22 and the cylindrical body 23 and the rotary shaft 20. 14 is formed in the radial direction. A cover 15 is fixed to the casing 10 on the side in contact with the other end surface of the rotor 22 and the cylindrical body 23. The cover 15 has a second end for rotatably supporting the tip of the rotary shaft 20. The bearing portion 16 is provided. The second bearing 16 and the cover 15 are also formed with a thin groove 17 in the radial direction. A second small hole 19 communicating with the inner surface of the casing 10 is formed in the second bearing portion 16.

On the other hand, a first small hole 18 communicating with the opposite side of the first bearing portion 13 is formed along the axis of the rotary shaft 20 at the inlet 12 through which the lubricating oil entering the casing 10 passes. Has been done.

Next, the operation of this embodiment will be described. When the motor 1 rotates, the rotary shaft 20 rotates, and the spline 21 integrated with this rotates. As a result, the rerotator 22 rotates, and the cylindrical body 23 meshing with this also rotates. At this time, one of the teeth of the cylindrical body 23 and the teeth of the rotor 22 mesh with each other, and a gap is formed between the other, so that the lubricating oil is sucked from the inflow port 12 and the already sucked lubricating oil from the discharge port 11. Is ejected. The lubricating oil discharged in this way enters the filter, and the lubricating oil passing through this is supplied to the machine. This operation is repeated while the motor 1 is operating, and the lubricating oil is supplied to the machine.

On the other hand, a part of this high-pressure lubricating oil is also supplied to the first and second bearing portions 13 and 16 through the grooves 14 and 17, and the supplied lubricating oil is supplied to the first and second bearing portions. Since the small holes 18, 19 return to the inside of the rotor 22, the casing 10, the rotor 22, the cylindrical body 23, and the rotary shaft 20 in the pump 2 are constantly lubricated and wear is reduced.

[0013]

[Effect of device]

 As is apparent from the embodiments described above, the present invention forms the grooves 14, 17 and the small holes 18, 19 in the casing 10, the cover 15 and the bearing portions 13, 16 and is supplied into the pump 2. Since the lubricating oil is circulated and supplied through these grooves 14 and 17 and the small holes 18 and 19, the pumps are constantly lubricated during operation, the wear of their mutual contact portions is extremely reduced, and the service life is shortened. Extends. In addition, such a long service life has significant effects such as frequent replacement of pump parts and improved work efficiency.

[Brief description of drawings]

FIG. 1 is a sectional view showing a main part of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is an enlarged sectional view showing a main part of a trochoid pump.

FIG. 4 is a schematic overall front view of a trochoid pump.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Motor 2 Trochoid pump 3 Filter case 10 Casing 11 Discharge port 12 Inflow port 13 First bearing portion 14, 17 groove 15 Cover 16 Second bearing portion 18 First small hole 19 Second small hole 20 Rotating shaft 21 Spline 22 Rotor 23 Cylindrical body

Claims (1)

[Scope of utility model registration request] 1. A trochoid pump that performs suction and discharge operations by a rotating body that rotates in a casing, comprising: a rotor that rotates integrally with a rotation shaft in the casing;
On the outer circumference of the rotor, there is rotatably arranged a cylinder having inner teeth, which is one more in number than the teeth formed around the rotor, while the rotor and the end surface of the cylinder are in contact with each other. A groove long in the radial direction is formed on the contact surface of the casing with the cover, and a small hole is formed in the bearing formed on the cover that supports the tip of the rotating shaft.
Further, the forced lubricating device is characterized in that a small hole communicating with a bearing portion of the rotating shaft is formed at an inlet formed on a side of the casing where one end of the rotor comes into contact.