KR100900719B1 - Pump for providing grease - Google Patents

Abstract

A grease supply pump is provided to prevent the thermal transformation and fatigue failure by molding an inner reinforcement rib within supply pump housing into one body. A grease supply pump comprises: an eccentric body(32) inserted and jointed in an axis(15) of a motor(14), installed on a lower part of a steering paddle assembly(22) within a pump housing; an element assembly(34) consisting of a spring(42) providing the elastic restoring force to a piston(40) while compacted in the reversing of the piston; a connector(45) for the pump power on combined in the outer surface of the pump housing; a binding hole(46) concavely formed in the inside of the pump housing in order to bury a PCB having an operating time lamp and a latency time lamp; and finishing plug(48) connected in a fastener.

Description

PUMP FOR PROVIDING GREASE [0002]

The present invention relates to a grease supply pump, and more particularly, to a grease supply pump for improving the structure of a pump housing of a grease supply pump for pumping grease to a desired position at a plurality of desired positions, To a grease supply pump.

As is well known, grease is a kind of lubricant used in semi-solid state, mainly used in parts where it is difficult to inject lubricant, exhibits a liquid state during exercise, and has a characteristic of being in a semi-solid state due to loss of mobility .

The grease having such characteristics is applied to a place where lubrication is required in a manufacturing facility of a vehicle, a friction drive portion and a connection portion of various vehicles, and various production facilities.

Recently, there has been proposed a grease supply pump which simultaneously distributes and supplies grease to a large number of parts requiring grease application.

However, the conventional grease supply pump has the following problems.

1) The pump housing, which is the main constituent of the pump for supplying grease, is manufactured using expensive materials that are made of 55% glass (glass fiber) additive and plastic, resulting in an increase in manufacturing cost.

2) A pump housing is manufactured through an injection process in the structure of a grease supply pump. In order to assemble a finishing plug or an element (piston) to the pump housing, a process of processing a separate female thread at a predetermined position of the pump housing Thereby further increasing the number of steps and lowering the workability.

3) There is a problem that when the pump housing is subjected to a separate threading operation, thermal deformation occurs in the pump housing, foreign matter is generated, and the machined surface becomes rough, thereby lowering the reliability of the product.

4) The parts where the elements of the pump housing are coupled are fragile, which causes fatigue increase and fatigue fracture of the corresponding parts when the grease is pumped by the elements.

5) In particular, there is a problem in that the element mounting portion of the pump housing is deformed outwardly in a convex manner due to a long-term repeated operation of the element mounted on the pump housing (deformation in the outward direction from the planar circular shape) have.

6) Due to the phenomenon such as overburden phenomenon and fatigue breakdown, the life of the pump housing is shortened and the discharge operation force of the element is lowered.

7) In addition to the occurrence of the flow of the element, the female thread of the pump housing, to which the element is coupled, is worn, and the gap between the grease reservoir (grease chamber) and the pump housing is generated due to the deformation of the pump housing, There is a problem that foreign matters are contained in the grease.

8) Since the connector mounted on the pump housing is made of an opaque material, it is impossible to confirm the operation time lamp and the standby time lamp of the PCB mounted in the connector, and it is inconvenient to assemble and disassemble the connector.

In order to solve the problems of the conventional grease supply pump as described above, the present invention proposes a pump housing made of a composite material of 35% glass and plastic through an injection process, in which a finishing plug or an element A metal thread, which has been manufactured in advance, can be injected in the injection process to form a female thread having a clean surface, and the manufacturing process can be simplified and the manufacturing cost can be reduced In addition, the inner reinforcing ribs can be integrally molded into various shapes in the pump housing to prevent thermal deformation and fatigue breakage, and the structure of the connector can be improved by a one-touch rotary opening / closing method of translucent material, And it is an object of the present invention to provide a grease supply pump for improving convenience.

According to an aspect of the present invention, there is provided a fuel pump comprising: a pump housing integrally injection-molded on a top surface of a reinforcing structure; A motor housed in the bottom space of the pump housing; A cover body coupled to the bottom of the pump housing; An intermediate plate coupled to an upper portion of the pump housing, the plate having a grease outlet hole formed at the center thereof; A reservoir for storing grease fastened to an upper rim of the pump housing; A cylindrical body inserted into an upper end portion of the steering plate to closely contact the wall surface of the reservoir and a nut for connecting the lower end of the steering plate to a shaft of the motor at a center position of the upper surface of the intermediate plate, A paddle assembly; An eccentric body positioned below the steering paddle and inserted into the shaft of the motor, inside the pump housing; A piston housed inside the element body and brought into contact with the surface of the eccentric body when the eccentric body rotates and moving forward and backward to discharge grease to the outside; A spring configured to provide elastic resilient force to the piston while being compressed upon retraction of the piston; A pump power supply connector coupled to the outer surface of the pump housing; A fastener formed inwardly of the outer surface of the pump housing so that the PCB having the operation time lamp and the standby time lamp is inserted therein; A finish plug sealed and fastened to the fastener; And a pump for supplying the grease.

In a preferred embodiment, the inner surface of the discharge port of the pump housing to which the element body is screwed is formed with a female screw acid by an insert discharge method in which metal bolts are inserted into the metal mold during the injection process.

According to another preferred embodiment of the present invention, the finishing plug is formed of a translucent material so that an operation time lamp and a waiting time lamp inside the finishing plug can be seen, and is fastened by a one-touch method in which the finishing plug is turned and opened by a fastening hole of the pump housing.

In another preferred embodiment, the reinforcing structure integrally formed on the upper surface of the pump housing includes a circular rib concentrically formed at a predetermined distance from the mounting hole through which the shaft of the motor passes, And a plurality of main vertical ribs connecting the outer surface of the circular rib and the wall surface of the pump housing.

Further, a reinforcing end of a triangular cross section is integrally formed between the lower end of the inner surface of the circular rib and the upper surface of the pump housing.

In addition, a plurality of inclined first auxiliary vertical ribs or horizontal auxiliary vertical ribs are integrally formed between the outer surface of the circular rib and the fastening port and the discharge port of the pump housing, and the outer surface of the circular rib and the pump housing And an inclined second auxiliary vertical rib is further integrally formed between the wall surfaces.

The upper surface of the pump housing between the outer surface of the circular rib and the wall surface of the pump housing is further integrally formed with a 2-mm thick gauze-reinforced surface.

Through the above-mentioned problem solving means, the present invention can provide the following effects.

1) The manufacturing cost can be reduced by injection molding the pump housing using 35% glass + plastic.

2) A method of forming a female thread in a discharge port for coupling an element (piston) of a pump housing is adopted as a method of inserting a metal bolt manufactured at the time of injection at the time of injection so that the process of forming a female thread is simple, Which is advantageous in that the surface of the female thread portion is clean and the thermal deformation is not easily generated in the female thread portion.

3) A circular rib, a main vertical rib, a secondary vertical rib, a resilient reinforcing face, and the like are integrally injection-molded into the pump housing to prevent fatigue increase and fatigue breakage of the pump housing when the element is pumped with grease, It is possible to prevent the folding phenomenon caused by the deformation, and as a result, it is possible to increase the soil power output and the lifetime of the element.

4) It adopts the finishing plug molded with semi-transparent material and improves the one-touch method of opening and closing by turning, it is easy to mount and unmount for opening and closing, and the operation time lamp and waiting time lamp included in PCB inside can be checked Provides advantages.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a front view, FIG. 3 is a side view, FIG. 4 is a bottom view, and FIG. 5 is a sectional view taken along line A-A of FIG.

The grease pump 100 of the present invention has a pump housing 10 disposed at an outer lower portion thereof and a reservoir 12 for storing grease is coupled to the upper portion of the pump housing 10.

A reinforcing structure is integrally formed to reinforce the strength of the pump housing 10. The reinforcing structure 10 is formed of a reinforcing structure, Will be described in more detail below.

The motor 14 is installed in the bottom space of the pump housing 10 and the shaft 15 of the motor 14 is extended toward the upper side.

A cover 16 for sealing is coupled to the bottom of the pump housing 10 by a screw in a state in which the motor 14 is retracted from the bottom of the pump housing 10 into the interior thereof.

The upper surface of the intermediate plate 20 is connected to the bottom surface of the reservoir 12 for storing grease 12, .

That is, when a reverse U-shaped reservoir 12 for storing grease is inserted into the upper rim of the pump housing 10, the upper surface of the intermediate plate 20 is connected to the bottom surface of the reservoir 12 for storing grease do.

A steering paddle assembly 22 is mounted on the intermediate plate 20 and includes a vertically bent steering plate 24 and a guide plate 24 inserted into the upper end of the steering plate 24, A nut 28 for connecting the lower end of the steering plate 24 to the shaft 15 of the motor 14 at the center of the upper surface of the intermediate plate 20; ).

More specifically, the lower end (horizontal end) of the vertically bent shaped steering plate 24 is fastened to the shaft 15 of the motor 14 extended to the center position of the upper surface of the intermediate plate 20, A cylindrical body 26, which is in close contact with the wall surface of the reservoir 12 and rolls, is inserted into the upper end (vertical end) of the steering plate 24.

Particularly, a grease punch 30 (paddle) is integrally formed at an acute angle on the lower end of the steering plate 24, and the grease punch 30 is connected to the grease outlet hole 18 of the intermediate plate 20 It will serve as a boost to Greece.

An eccentric body 32 is also disposed below the steering paddle assembly 22 in the pump housing 10 so that the eccentric body 32 is also supported on the shaft 15 of the motor 14 And is in a state of being inserted and fastened.

An element assembly 34 capable of discharging grease to the outside while moving forward and backward when the eccentric body 32 rotates is provided at a discharge port 36 formed in one inner wall surface of the pump housing 10. [

The element assembly 34 is composed of a hollow element body 38, a piston 40, and a spring 42.

The element body 38 of the element assembly 34 is screwed to the discharge port 36 of the pump housing 10. At this time, the female thread 44 is inserted into the inner surface of the discharge port 36 by an insert injection method It is in a formed state.

That is, the metallic thread is pre-inserted into the metal mold during the injection process of the pump housing 10 and then the injection process is performed to form the female thread 44 on the inner surface of the discharge port 36 of the pump housing 10 State.

Therefore, it is possible to easily insert and fasten the element body 38 having the male thread into the discharge port 36 in which the female thread 44 is formed in advance, It is possible to provide the surface of the female thread having a clean surface by the insert injection method and to prevent the thermal deformation of the female thread portion which is generated in the conventional processing.

As a constitution of the element assembly 34, a piston 40 is provided inside the element body 38 so as to move forward and backward so as to discharge the grease outward while contacting the surface of the eccentric body 32 when the eccentric body 32 rotates. Is inserted.

A spring (42), which provides an elastic restoring force to the piston (40) while being compressed when the piston (40) is retracted, is inserted into the outer peripheral surface of the piston (40).

On the other hand, a pump power supply connector 45 is mounted on the outer surface of the pump housing 10.

A fastener 46 is formed on the outer surface of the pump housing 10. A PCB (not shown) having an operation time lamp and a standby time lamp is installed in the fastener 46, A sealing finishing plug 48 is fastened to the fastening opening 46.

At this time, the finishing plug 48 is made of a translucent material so that the operation time lamp and the waiting time lamp inside the fastening hole 46 can be seen. The finishing plug 48 is inserted into the fastening hole 46 of the pump housing 10, And a fastening end 50 of one-touch type for opening and closing.

Hereinafter, the operational flow of the grease supply pump of the present invention will be described.

When the grease storing reservoir 12 is filled with grease, power is supplied from the external power source to the motor 14 via the connector 45 to drive the motor.

The shaft 14 of the motor 14 is rotated by the driving of the motor 14 so that the steering plate 24 of the eccentric body 32 and the steering paddle assembly 22 is simultaneously rotated, The paddle integrated in the lower end of the plate 24, that is, the grease pusher 30, pushes the grease into the grease outlet hole 18 of the intermediate plate 20.

The grease flowing out through the grease outlet hole 18 is supplied to the eccentric body 32 rotating together with the shaft 15 of the motor 14 and the operation of the element assembly 34 interlocked with the eccentric body 32 To the discharge port (36) of the pump housing (10).

That is, when the eccentric body 32 rotates, when the piston 40 of the element assembly 34 moves backward while compressing the spring 42 at the maximum thickness point of the eccentric body 32, At this time, the grease is transferred to the outside of the discharge port 36 along the groove 52 formed in the piston 40.

Conversely, when the eccentric body 32 rotates, the piston 40 of the element assembly 34 is advanced to its original position by the elastic restoring force of the spring 42 at the minimum thickness point of the eccentric body 32 .

When the piston 40 of the element assembly 34 is repeatedly advanced and reversed, the grease continues to be discharged to the outside through the discharge port 36 of the pump housing 10.

At this time, the grease discharged to the outside of the pump housing 10 is simultaneously distributed and supplied to a plurality of desired positions (friction portions) through the distributor 54 as shown in FIG.

Hereinafter, embodiments of the reinforcing structure integrally formed in the pump housing according to the present invention will be described with reference to FIGS.

The reinforcing structure according to each embodiment of the present invention is a structure that is integrally formed on the upper surface of the inside of the pump housing. It is possible to prevent the fatigue increase and fatigue breaking phenomenon of the pump housing when the element is pumped with grease, And thus it is possible to provide an effect of increasing the soil power of the element and increasing the life span of the element.

First Embodiment

As shown in FIG. 8, the reinforcing structure has a 3 mm thickness and a 8 mm height, which are concentric with the motor mounting hole 56 formed on the upper surface of the pump housing 10, A plurality of main vertical ribs, preferably nine main vertical ribs 60, are integrally formed between the outer surface of the circular rib 58 and the wall surface of the pump housing 10 .

At this time, the main vertical ribs 60 have a gradually increasing inclination from the inside to the outside.

Second Embodiment

In the second embodiment of the reinforcing structure, as shown in FIG. 9, a 2 mm thick reinforcing surface 62 is integrally formed on the upper surface (excluding the motor mounting hole) of the pump housing 10, A plurality of main vertical ribs, preferably nine main vertical ribs 60, are integrally formed between the motor mounting hole 56 and the wall surface of the pump housing 10. [

Likewise, the main vertical ribs 60 have a gradually increasing inclination from the inside to the outside.

Third Embodiment

As a third embodiment of the reinforcing structure, as shown in FIG. 10, a 2 mm thick resilient reinforcing surface 62 is integrally formed on the upper surface (excluding the motor mounting hole) of the pump housing 10, A plurality of main vertical ribs, preferably nine main vertical ribs 60 are integrally formed between the motor mounting hole 56 and the wall surface of the pump housing 10 and the surface of the motor mounting hole 56 is also formed to have a thickness of 2 mm As shown in FIG.

Likewise, the main vertical ribs 60 have a gradually increasing inclination from the inside to the outside.

Fourth Embodiment

As a fourth embodiment of the reinforcing structure, a plurality of main vertical ribs, preferably nine main vertical ribs, are provided between the wall of the pump housing 10 and the motor mount 56, The rib 60 is integrally formed and a reinforcing end 64 having a triangular cross section is integrally formed at the boundary between the upper surface of the pump housing 10 and the motor mounting hole 56. [

Likewise, the main vertical ribs 60 have a gradually increasing inclination from the inside to the outside.

Fifth Embodiment

12, a motor mounting hole 56 formed on the upper surface of the pump housing 10 is formed to have a 3 mm thickness and a 8 mm height in a concentric manner, A plurality of main vertical ribs, preferably nine main vertical ribs 60, are integrally formed between the outer surface of the circular ribs 58 and the wall surface of the pump housing 10 , And between the lower end of the inner surface of the circular rib 58 and the surface of the motor mount 56, a reinforcing end 64 having a triangular cross section is further integrally molded.

Likewise, the main vertical ribs 60 have a gradually increasing inclination from the inside to the outside.

Sixth Embodiment

As a sixth embodiment of the reinforcing structure, as shown in FIG. 13, a motor mounting hole 56 formed on the upper surface of the pump housing 10 is formed to have a 3 mm thickness and a 8 mm height A plurality of main vertical ribs, preferably nine main vertical ribs 60, are integrally formed between the outer surface of the circular rib 58 and the wall surface of the pump housing 10 .

A reinforcing end 64 having a triangular cross section is further integrally formed between the lower end of the inner surface of the circular rib 58 and the surface of the motor mount 56.

Six inclined first auxiliary vertical ribs 66 are integrally formed between the outer surface of the circular rib 58 and the fastening opening 46 and the discharge opening 36 of the pump housing 10, An inclined second auxiliary vertical rib 68 having a longer length is further integrally formed between the outer surface of the circular rib 58 and the wall surface of the pump housing 10. [

At this time, the main vertical ribs 60, the first auxiliary vertical ribs 66, and the second auxiliary vertical ribs 68 have a gradually increasing inclination from the inner side to the outer side.

The fastening port 46 and the discharge port 36 of the pump housing 10 and the second auxiliary vertical rib 68 are integrally connected to each other by the connection end 70 while being spaced apart from each other.

Seventh Embodiment

As a seventh embodiment of the reinforcing structure, as shown in FIG. 14, the reinforcement structure has the same reinforcing structure as the sixth embodiment, except that only the outer surface of the circular rib 58 is fastened to the pump housing 10 Unlike the sixth embodiment in which six inclined first auxiliary vertical ribs 66 are integrally formed between the ball 46 and the discharge port 36, the six inclined first auxiliary vertical ribs 66 are divided into six And is replaced with a horizontal auxiliary secondary rib 72.

That is, the six horizontal auxiliary vertical ribs 72 are characterized by having a uniform height rather than an inclined shape.

Eighth Embodiment

15, the reinforcing structure has the same reinforcing structure as that of the sixth embodiment except that only the outer surface of the circular rib 58 and the wall surface of the pump housing 10 And a 2 mm thick resilient reinforcing face 62 is further integrally molded on the surface of the pump housing 10 between the two.

Comparative Examples 1 to 2

Comparative Example 1 and Comparative Example 2 are the conventional pump housing structure. In Comparative Example 1, as shown in FIG. 6, a motor mounting hole 56 formed on the upper surface of the pump housing 10, , Only nine main vertical ribs 60 are integrally formed.

7, nine main vertical ribs 60 are provided between the motor mounting hole 56 formed on the upper surface of the pump housing 10 and the wall surface of the pump housing 10, Six inclined first auxiliary vertical ribs 66 are integrally formed between the outer surface of the circular rib 58 and the fastening opening 46 and the discharge opening 36 of the pump housing 10 And an inclined second auxiliary vertical rib 68 having a longer length is further integrally formed between the outer surface of the circular rib 58 and the wall surface of the pump housing 10.

Test Example

In order to derive an optimum rib structure suitable for reinforcing the strength of the pump housing and to perform strength analysis tests on comparative examples showing a conventional pump housing reinforcing structure, Respectively.

In Comparative Example 1 and Comparative Example 2, the amounts of deformation on the side of the pump discharge port were 0.7506 mm and 0.7412 mm, respectively. However, in Examples 1 to 8, the amount of deformation was smaller than that of Comparative Example.

In particular, in the case of the eighth embodiment, i) a round rib 58 having a thickness of 3 mm and a height of 8 mm formed concentrically with the motor mount 56 formed on the upper surface of the pump housing 10, Ii) a plurality of main vertical ribs, preferably nine main vertical ribs 60, are integrally formed between the outer surface of the circular rib 58 and the wall surface of the pump housing 10, iii) the circular ribs 58) and the surface of the motor mount is formed integrally with the reinforcing end (64) of a triangular cross section, iv) the outer surface of the circular rib (58) The first auxiliary vertical ribs 66 are integrally formed between the first auxiliary vertical ribs 46 and the discharge port 36. A gap between the outer surface of the circular ribs 58 and the wall surface of the pump housing 10 has a longer length And the inclined second auxiliary vertical ribs 68 having the circular ribs 58 are further integrally molded, and v) And a 2 mm thick resilient reinforcing surface 62 is integrally formed on the surface of the pump housing 10 between the surface of the pump housing 10 and the wall surface of the pump housing 10. As a result of the analysis, the amount of deformation is 0.4570 mm It is found that it is the most suitable reinforcing structure to prevent deformation of pump housing and maintain strength.

1 is an exploded perspective view showing a grease supply pump according to the present invention,

2 is a front view showing a grease supply pump according to the present invention,

3 is a side view showing a grease supply pump according to the present invention,

4 is a bottom view showing a grease supply pump according to the present invention,

5 is a sectional view taken along the line A-A in Fig. 4 showing a grease supply pump according to the present invention,

6 and 7 are schematic views showing results of strength analysis for a conventional pump housing,

8 to 15 are schematic views showing results of strength analysis for a pump housing according to the present invention,

16 is a schematic view comparing strength analysis results of the conventional and pump housings of the present invention,

17 is a schematic view illustrating a system connected to a grease supply pump according to the present invention to distribute and supply grease to a desired position.

Description of the Related Art

10: pump housing 12: reservoir

14: motor 15: shaft

16: Cover body 18: Grease outlet hole

20: Intermediate plate 22: Steering paddle assembly

24: steering plate 26: cylindrical body

28: Nut 30: Grease pusher

32: eccentric body 34: element assembly

36: discharge port 38: element body

40: piston 42: spring

44: female thread 45: connector

46: fastener 48: closing plug

50: fastening end 52: groove

54: distributor 56: motor mounting hole

58: Circular rib 60: Main vertical rib

62: reinforcement surface 64: reinforcing end of triangular section

66: inclined first auxiliary vertical rib 68: inclined second auxiliary vertical rib

70: connecting end 72: horizontal auxiliary secondary rib

100: grease supply pump

Claims (7)

A pump housing 10 integrally injection-molded on the upper surface of the reinforcing structure; A motor (14) embedded in the bottom space of the pump housing (10); A cover body (16) coupled to the bottom of the pump housing (10); An intermediate plate (20) coupled to an upper surface of the pump housing (10) as a plate body having a grease outlet hole (18) formed at the center thereof; A reservoir 12 for storing grease, which is fastened to an upper edge of the pump housing 10; A cylindrical body 26 inserted into the upper end of the steering plate 24 to be brought into close contact with the inner wall surface of the reservoir 12 and a lower end of the steering plate 24, A steering paddle assembly 22 consisting of a nut 28 connecting to the shaft 15 of the motor 14 at a top center position of the plate 20; An eccentric body 32 positioned below the steering paddle assembly 22 and inserted into the shaft 15 of the motor 14 in the pump housing 10; A hollow element body 38 which is screwed into the discharge port 36 of the pump housing 10 and a hollow element body 38 which is contained in the element body 38 and which contacts the surface of the eccentric body 32 An element assembly 34 composed of a piston 40 which is moved forward and rearward to discharge it to the outside and a spring 42 which provides an elastic restoring force to the piston 40 while being compressed when the piston 40 is retracted; A pump power supply connector 45 coupled to the outer surface of the pump housing 10; A fastener (46) recessed inwardly from the outer surface of the pump housing (10) so that a PCB having an operation time lamp and a standby time lamp is inserted therein; A finishing plug 48 sealed and fastened to the fastening port 46; And a pump for supplying the grease. The inner surface of the discharge port (36) of the pump housing (10) to which the element body (38) is screwed is provided with a female thread (44) by an insert injection method in which metal bolts are inserted into the metal mold Wherein the grease supply pump is formed in advance. The method of claim 1, wherein the finishing plug (48) is formed of a translucent material so that an operation time lamp and a waiting time lamp inside the finishing plug (48) can be seen and is rotated by a fastener (46) of the pump housing And the oil supply pump. The pump housing (10) according to claim 1, wherein the reinforcing member integrally molded on the upper surface of the pump housing (10) A circular rib 58 concentric with the motor mount 56 through which the shaft 15 of the motor 14 penetrates; And a plurality of main vertical ribs (60) connecting the outer surface of the circular rib (58) and the wall surface of the pump housing (10). A reinforcing end 64 having a triangular cross section is integrally formed between the lower end of the inner surface of the circular rib 58 and the surface of the motor mount 56 on which the motor is mounted on the upper surface of the pump housing 10, Wherein the grease supply pump is further molded. A plurality of inclined first auxiliary vertical ribs (66) or horizontal horizontal auxiliary ribs (66) are provided between the outer surface of the circular rib (58) and the fastening opening (46) and the discharge opening (36) of the pump housing A vertical rib 72 is integrally formed and an inclined second auxiliary vertical rib 68 is integrally formed between the outer surface of the circular rib 58 and the wall surface of the pump housing 10. [ Grease supply pump. A grease according to claim 4, characterized in that the upper surface of the pump housing between the outer surface of the circular rib (58) and the wall surface of the pump housing (10) is further integrally molded with a 2 mm- Feeding pump.

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