CN209855984U

CN209855984U - Single-plunger pump

Info

Publication number: CN209855984U
Application number: CN201920659609.8U
Authority: CN
Inventors: 李壮; 夏小强
Original assignee: Suzhou Redefine Industrial Design Co Ltd
Current assignee: Suzhou Redefine Industrial Design Co Ltd
Priority date: 2019-05-09
Filing date: 2019-05-09
Publication date: 2019-12-27
Anticipated expiration: 2029-05-09

Abstract

The utility model discloses a single plunger pump, which comprises a pump body, pump head and pump cover, the pump head sets up the one end of the pump body, the top at the pump head is installed to the pump cover, there is the motor inside of the pump body through motor support fixed mounting, the pinion passes through the gear wheel and is connected with the eccentric shaft transmission, the one end fixed mounting of eccentric shaft has the plunger, deep groove ball bearing is installed to the equal symmetry in the one end of gear wheel and the both ends of eccentric shaft, the outside cover of off-load case is equipped with the off-load valve spring, the one end of pump head is equipped with the outlet pipe, one side of water supply connector and outlet pipe is equallyd divide and does not install a set of O type sealing washer and business turn over water bolt, the outside both sides of plunger are equipped with. The utility model discloses simple structure, matter is light, and assemblability and manufacturability improve by a wide margin, and economic nature and good reliability can use occasions such as handheld rifle, agricultural injection pump in a large number.

Description

Single-plunger pump

Technical Field

The utility model relates to a pump specifically is a single-plunger pump.

Background

The cleaning machine on the market at present generally uses three steel plunger pumps of sloping cam plate drive, and the structure is complicated, and weight is heavy, is unsuitable for handheld product. The horizontal bar double-end plunger pump product generally adopts planetary gear transmission or internal gear meshing transmission and the like, and although the center distance between the motor output shaft and the pump transmission shaft is small, the whole transmission efficiency is poor, and the noise is large. The common gear box and the motor lower support of the horizontal bar hand-held pump in the market are designed into a whole, the gear box and the motor need to be assembled firstly in the installation process, then a transmission system, a hydraulic system and the like are installed on the basis of smashing the gear box, and in the dismounting and maintenance process, the pump and the motor cannot be mutually independent and the assembling and maintenance process is complex due to the fact that the pump and the motor need to be strictly dismounted reversely according to steps. The design of water inlet and outlet of the handheld horizontal bar pump adopts different sizes and connection forms, and is complex; or the water inlet and the water outlet are concentrated on one part, the structural universality is poor, and the expansibility of the pump is poor. The unloading form of the pump structure generally adopts a cone valve unloading structure, and the pump structure is provided with an independent valve body and a sealing structure, so that the pump structure has the disadvantages of more parts, complex structure and poor reliability. And generally, an oil seal is arranged on the lower side of the compression ring and used for sealing grease in the gear box, and simultaneously, a small amount of water leaked from the water seal is prevented from flowing into the gear box, so that the oil seal is high in holding force, poor in overall efficiency and not suitable for a low-power handheld product. Gear box in the existing market generally designs motor locating hole and transmission shaft mounting hole in the opposition direction of part, leads to the central dimension deviation in two holes in the part manufacture process big, and the noise is big, and is efficient. Reasonable part precision is required, the part production cost is high, and the economy is poor.

SUMMERY OF THE UTILITY MODEL

For solving the problem that prior art exists, the utility model provides a single-plunger pump.

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model relates to a single plunger pump, which comprises a pump body, a pump head and a pump cover, wherein the pump head is provided with one end of the pump body, the pump cover is arranged at the top end of the pump head, the inside of the pump body is fixedly provided with a motor through a motor bracket, the output end of the motor is provided with a pinion, one side of the pinion is fixedly provided with a big gear, one side of the big gear is fixedly provided with an eccentric shaft, the pinion is in transmission connection with the eccentric shaft through the big gear, one end of the eccentric shaft is fixedly provided with a plunger, one end of the big gear and two ends of the eccentric shaft are symmetrically provided with deep groove ball bearings, one side of the pump head is provided with a water inlet connector, one end inside the water inlet connector is provided with an unloading valve core, the outside of the unloading valve core is, the outside both sides of plunger are equipped with the clamping ring to through water seal, the end cap that is used for sealed is installed through the end cap bolt in one side on pump cover top, and the upper and lower bilateral symmetry of off-load case is equipped with two sets of check valves, and every check valve outside all is equipped with check valve subassembly.

Furthermore, the pump head and the pump body are fixedly installed through cross-shaped groove pan head screws.

Furthermore, the small gear and the large gear are in external meshing transmission, and the modulus is 0.6-1.

Furthermore, the unloading valve core and the pump head are sealed by a line, and the size of the unloading valve hole is 1.5-2.5 mm.

Furthermore, the inner side of the pressure ring is provided with a sealing groove, a complete cavity is formed by the pressure ring, the plunger and the pump head, and an O-shaped sealing ring is arranged in the cavity.

Furthermore, lubricating grease is arranged in a cavity between the plunger and the pump head.

Furthermore, the two groups of one-way valves comprise a first water inlet valve, a first water outlet valve, a second water inlet valve and a second water outlet valve.

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

the single-plunger pump has the advantages that the structure of the pump is reasonably optimized, so that two ends of the plunger participate in hydraulic action in the operation process, the plunger moves once and pumps water twice in the same number of parts and small size, and the single-plunger pump is simple in structure and high in efficiency.

And by the meshing transmission design of the large gear and the small gear, the progress and the manufacturing difficulty of parts are reduced, and the transmission efficiency of a transmission system is improved.

(III), through optimizing the motor support design, with the set screw design of motor support and transmission system in the pump transmission system outside, can realize not dismantling the pump package spare, and with the function of whole pump follow motor dismantlement, make things convenient for the production of modularization, promote the work degree of difficulty of maintenance etc. by a wide margin simultaneously.

And (IV) the water inlet and the water outlet of the pump are optimally arranged in the 90-degree direction of the pump, and the water inlet and the water outlet are designed into the insertion ports with the same size, so that the universality of parts is good, and the use of the pump in different use occasions is facilitated.

(V), with the pump head, the clamping ring, and the plunger between design formation seal chamber, seal in cavity internal design and be used for the separation to follow the rivers of a small amount of water seal seepage and flow into the gear box, realize sealed function under the condition that does not increase the part number, simple structure, good reliability, it is with low costs.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a partial schematic structural view of a front view of a single plunger pump of the present invention;

fig. 2 is a bottom cross-sectional view of a single plunger pump of the present invention;

fig. 3 is a top view of a single plunger pump of the present invention;

fig. 4 is a left side cross-sectional view of a single plunger pump of the present invention;

fig. 5 is a schematic diagram of the single plunger pump of the present invention.

In the figure: 1. a body; 2. a pump cover; 3. an O-shaped sealing ring; 4. pressing a ring; 5. water sealing; 6. a plug; 7. a plug bolt; 8. a water outlet pipe; 9. a water inlet and outlet bolt; 10. an unloading valve core; 11. an unloader valve spring; 12. a water inlet joint; 13. a pump head; 14. a plunger; 15. a deep groove ball bearing; 16. a bull gear; 17. a motor bracket; 18. an eccentric shaft; 19. a pinion gear; 20. a motor; 21. a one-way valve assembly; 22. a one-way valve; 23. a cross recessed pan head screw; 24. lubricating grease.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

As shown in fig. 1 to 5, a single plunger pump comprises a pump body 1, a pump head 13 and a pump cover 2, wherein the pump head 13 is provided with one end of the pump body 1, the pump cover 2 is installed at the top end of the pump head 13, a motor 20 is fixedly installed inside the pump body 1 through a motor bracket 17, a pinion 19 is installed at the output end of the motor 20, a large gear 16 is fixedly installed at one side of the pinion 19, an eccentric shaft 18 is fixedly installed at one side of the large gear 16, the pinion 19 is in transmission connection with the eccentric shaft 18 through the large gear 16, a plunger 14 is fixedly installed at one end of the eccentric shaft 18, deep groove ball bearings 15 are symmetrically installed at one end of the large gear 16 and at two ends of the eccentric shaft 18, a water inlet connector 12 is arranged at one side of the pump head 13, an unloading valve core 10 is arranged at one end inside the water inlet connector 12, an unloading valve spring 11 is sleeved outside the unloading valve core, the water inlet connector 12 is communicated with the water outlet pipe 8, the pressing rings 4 are arranged on two sides of the outer portion of the plunger 14 and sealed through the water seal 5, the plug 6 used for sealing is installed on one side of the top end of the pump cover 2 through the plug bolt 7, the two sets of check valves 22 are symmetrically arranged on the upper side and the lower side of the unloading valve core 10, and the check valve assembly 21 is arranged on the outer side of each check valve 22.

Wherein, the pump head 13 and the pump body 1 are fixedly installed through a cross recessed pan head screw 23.

The small gear 19 and the large gear 16 are in external meshing transmission, the modulus is 0.6-1, the part progress and the manufacturing difficulty are reduced, and meanwhile, the transmission efficiency of a transmission system is improved.

Wherein, the unloading valve core 10 and the pump head 13 are sealed by a line, and the size of the unloading valve hole is 1.5-2.5mm, so that the internal space is more optimized.

Wherein, the clamping ring 4 inboard is equipped with the seal groove to form complete cavity with plunger 14, pump head 13, cavity inside sets up O type sealing washer 3, when reciprocating motion's water seal has a small amount of water seepage, this O type sealing washer 3 can prevent inside water inflow pump body 1 along plunger 14's reciprocating motion, leads to inside parts to meet water corrosion etc..

Wherein, lubricating grease 24 is arranged in the cavity between the plunger 14 and the pump head 13, which plays a role in lubrication.

Wherein, the two sets of check valves 22 include a first inlet valve, a first outlet valve, a second inlet valve, and a second outlet valve.

It should be noted that the utility model relates to a single plunger pump, concrete during operation, plunger 14 realizes reciprocating motion under the cam drive, has two sealed cavitys, cavity one and cavity two respectively at plunger 14 both ends. The machine is not internally provided with water in an initial state, when the plunger 14 moves from the right to the left, air in the cavity I is positive pressure, the first water inlet valve is closed, the first water outlet valve is opened, air in the cavity I is discharged, when the plunger 14 moves to a limit position and moves from the left to the right, the volume of the inner part of the cavity I is enlarged to form negative pressure vacuum, the first water outlet valve is closed, the first water inlet valve is opened, air in the water inlet pipe is continuously sucked into the cavity I, when the negative pressure of the cavity I is sucked, the gas in the cavity II is discharged, the circulation is performed until the air in the water inlet system is exhausted, the liquid is filled in the water inlet pipeline, and the self-water-sucking function is realized. When the plunger 14 moves from right to left, the liquid in the first cavity is pressurized positively, the first water inlet valve is closed, the first water outlet valve is opened, the liquid in the first cavity is pumped out from the water outlet, meanwhile, the negative pressure is formed in the second cavity, the second water outlet valve is closed, the second water inlet valve is opened, and the liquid is sucked into the second cavity from the water inlet. When the plunger 14 moves to the extreme position at the left end, the cam drives the plunger 14 to move from left to right, at this time, the inside of the cavity II is filled with liquid, the liquid is converted into positive pressure due to the compression of the plunger 14, the second water inlet valve is closed, the first water outlet valve is opened, the liquid inside the cavity II is pumped out from the water outlet by the plunger 14, in the process that the plunger 14 moves from left to right, the pressure inside the cavity I is changed into negative pressure, the first water outlet valve is closed, the first water inlet valve is opened, the liquid is sucked into the cavity I from the water inlet, and therefore a cycle is completed.

When the water outlet is blocked by foreign matters, the internal pressure of the pump rises to exceed the set pressure of the safety valve, the safety valve is opened, high-pressure water between the water outlet check valve and the water outlet is discharged from the safety valve to a low-pressure area in front of the water inlet check valve, the internal pressure of the pump is protected from being too high, and the pump structure is protected from being damaged.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. Wherein "upper", "lower", "left" and "right" all represent terms of orientation. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A single plunger pump comprises a pump body (1), a pump head (13) and a pump cover (2), wherein the pump head (13) is provided with one end of the pump body (1), the pump cover (2) is arranged on the top end of the pump head (13), a motor (20) is fixedly arranged in the pump body (1) through a motor support (17), the single plunger pump is characterized in that a pinion (19) is arranged at the output end of the motor (20), a gear wheel (16) is fixedly arranged on one side of the pinion (19), an eccentric shaft (18) is fixedly arranged on one side of the gear wheel (16), the pinion (19) is in transmission connection with the eccentric shaft (18) through the gear wheel (16), a plunger (14) is fixedly arranged at one end of the eccentric shaft (18), deep groove ball bearings (15) are symmetrically arranged at one end of the gear wheel (16) and two ends of the eccentric shaft (18), a water inlet joint (12) is arranged on one side, the outside cover of off-load case (10) is equipped with off-load valve spring (11), the one end of pump head (13) is equipped with outlet pipe (8), a set of O type sealing washer (3) and business turn over water bolt (9) are equallyd divide to one side of water supply connector (12) and outlet pipe (8) and do not install, water supply connector (12) are linked together with outlet pipe (8), the outside both sides of plunger (14) are equipped with clamping ring (4), and seal through water seal (5), end cap (6) that are used for sealed are installed through end cap bolt (7) in one side on pump cover (2) top, the upper and lower bilateral symmetry of off-load case (10) is equipped with two sets of check valve (22), every check valve (22) outside all.

2. A single-plunger pump according to claim 1, characterised in that the pump head (13) is fixedly mounted to the pump body (1) by cross-recessed pan head screws (23).

3. Single piston pump according to claim 1, in which the external gearing between the pinion (19) and the gearwheel (16) has a module of 0.6 to 1.

4. The single-plunger pump according to claim 1, characterized in that the unloading valve core (10) and the pump head (13) are sealed by a line, and the size of the unloading valve hole is 1.5-2.5 mm.

5. The single-plunger pump according to claim 1, characterized in that the inner side of the pressure ring (4) is provided with a sealing groove, and forms a complete cavity with the plunger (14) and the pump head (13), and an O-shaped sealing ring (3) is arranged in the cavity.

6. A single plunger pump according to claim 1, characterised in that grease (24) is provided in the cavity between the plunger (14) and the pump head (13).

7. Single plunger pump according to claim 1, characterised in that said two sets of non return valves (22) comprise a first inlet valve, a first outlet valve, a second inlet valve, a second outlet valve.