CN209838571U - Connection structure of agricultural machinery fuel feed pump - Google Patents

Abstract

The utility model provides a connection structure of agricultural machinery fuel feed pump belongs to fluid machinery technical field. The problem that the coaxiality of an existing motor shaft and an existing pump shaft is low after the motor shaft and the pump shaft are connected through a coupler is solved. This agricultural machinery fuel feed pump includes the motor, pump head and shaft coupling, through the coupling joint between the transmission shaft of motor and the pump shaft of pump head, this shaft coupling passes through the screw-up shaping for controlling split type structure, the center card of shaft coupling is equipped with the connecting piece, the upper and lower both ends face of connecting piece is seted up and is the groove of round platform structure and respectively with the transmission shaft, the terminal surface of pump shaft is mutually supported, wherein through skewed tooth meshing between transmission shaft and the connecting piece, the contact surface of pump shaft and connecting piece is smooth planar structure, the below card that lies in the connecting piece in the shaft coupling is equipped with the drive ring, be the cusp meshing between the outer lane of drive ring and the shaft coupling, the pump shaft passes the center. The utility model has the advantages of the practicality is good and the axiality high stability is better.

Description

Connection structure of agricultural machinery fuel feed pump

Technical Field

The utility model belongs to the technical field of fluid machinery, a pump, in particular to connection structure of agricultural machinery fuel feed pump is related to.

Background

Fuel feed pumps, also known as fuel pumps, are a term of art in the automotive industry and are one of the basic components of fuel injection systems, the fuel feed pump operating at start-up and engine operation. The fuel supply pump is used for sucking fuel from the fuel tank, pressurizing the fuel and then conveying the fuel to the fuel supply pipe, and the fuel supply pump is matched with the fuel pressure regulator to establish certain fuel pressure.

The connected mode of motor and pump head divide into two kinds in the fuel feed pump, one kind is direct setting epaxial for associated mode impeller, and another kind is for linking to each other through the shaft coupling, and is comparatively common in the multistage pump, but this structure exists following not enough, and the axiality can reduce after motor shaft and pump shaft pass through the coupling joint, causes the transmission efficiency of pump to reduce to the contact surface of each spare part relevant with the axle easily wears and teares, causes the leakproofness to descend the noise grow.

Disclosure of Invention

The utility model aims at providing a to the above-mentioned problem that exists among the prior art, provide the connection structure of the better motor of the practicality and the pump head of axiality high stability in the agricultural machinery fuel feed pump.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a connection structure of agricultural machinery fuel feed pump, includes motor, pump head and shaft coupling, through the coupling joint between the transmission shaft of motor and the pump shaft of pump head, this shaft coupling passes through the screw-up shaping for controlling split type structure, a serial communication port, the center card of shaft coupling is equipped with the connecting piece, and the groove that is the round platform structure is offered to the upper and lower both ends face of connecting piece and mutually supports with the terminal surface of transmission shaft, pump shaft respectively, wherein through the skewed tooth meshing between transmission shaft and the connecting piece, the contact surface of pump shaft and connecting piece is smooth planar structure, and the below card that lies in the connecting piece in the shaft coupling is equipped with the drive ring, is the cusp meshing between the outer lane of drive ring and the shaft coupling, and the pump.

The principle of the connecting structure of the agricultural machinery oil supply pump is as follows: the motor drive shaft passes through the skewed tooth meshing and gives the connecting piece with power transmission, the connecting piece outside is established each other with the shaft coupling and is driven its rotation, the shaft coupling passes through dentate meshing structure and gives the drive ring with power transmission, the transmission of power is realized through the spline with the pump shaft to the drive ring, in this fuel feed pump, the alignment of the central axis is realized through round platform type groove on the connecting piece to the tip of motor shaft and pump shaft, and fasten it through split type shaft coupling, axis meeting automatically regulated coincidence when the equipment of this structure, consequently, the axiality of transmission shaft and pump shaft is higher after accomplishing.

In the connection structure of the agricultural machinery fuel feed pump, a seal sleeve is arranged between the pump head and the pump shaft, the seal sleeve is made of hard rubber and is externally sleeved with a seal ring, and the seal sleeve and the pump head are fastened through thread matching.

In the connection structure of the agricultural machinery oil supply pump, the pump head is provided with the exhaust valve, the exhaust valve comprises a valve body and a valve core, the valve core is fixedly connected with the damping sleeve, and an air flow channel which is matched with each other and is of a vertical structure is arranged between the valve body and the valve core.

In the connecting structure of the agricultural machinery oil supply pump, the connecting piece is provided with a central hole.

Compared with the prior art, this agricultural machinery fuel feed pump has following advantage: 1. the coaxiality of the transmission shaft and the pump shaft is higher, the integral efficiency of the pump can be improved, and the contact surfaces between the shaft and each part are not easy to wear; 2. the sealing sleeve is made of hard rubber and is matched with the pump shaft through threads, so that the mounting is convenient, and the sealing performance between the sealing sleeve and the pump shaft is better; 3. the structure of the exhaust valve can realize exhaust through rotating the valve core, and the exhaust is convenient without opening the whole body.

Drawings

FIG. 1 is a sectional view of the oil supply pump of the agricultural machinery.

In the figure, 1, a motor; 1a, a transmission shaft; 2. a pump head; 2a, a pump shaft; 3. a coupling; 4. a connecting member; 5. a drive ring; 6. sealing sleeves; 7. a seal ring; 8. a valve body; 9. a valve core; 10. a damping sleeve; 11. an air flow channel; 12. a central bore.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, this connection structure of agricultural machinery fuel feed pump, including motor 1, pump head 2 and shaft coupling 3, connect through shaft coupling 3 between the transmission shaft 1a of motor 1 and the pump shaft 2a of pump head 2, this shaft coupling 3 passes through screw fastening shaping for controlling split type structure, the center card of shaft coupling 3 is equipped with connecting piece 4, the upper and lower both ends face of connecting piece 4 is seted up and is the groove of round platform structure and respectively with transmission shaft 1a, the terminal surface of pump shaft 2a mutually supports, wherein pass through the skewed tooth meshing between transmission shaft 1a and the connecting piece 4, the contact surface of pump shaft 2a and connecting piece 4 is smooth planar structure, the card that lies in the below of connecting piece 4 in the shaft coupling 3 is equipped with drive ring 5, be the cusp meshing between the outer lane of drive ring 5 and the shaft coupling 3, pump shaft 2a passes the center of drive ring 5 and.

It is further said that, be provided with seal cover 6 between pump head 2 and the pump shaft 2a, seal cover 6 is equipped with sealing washer 7 for stereoplasm rubber material and outside cover, it is fastened through screw-thread fit between seal cover 6 and the pump head 2, seal cover 6's installation is comparatively convenient, it is direct through the screw thread setting on pump head 2, and realize sealed between the characteristic through the rubber material and the pump shaft 2a, realize sealed through realizing between sealing washer 7 and the 2 inner walls of pump head, still be provided with mechanical seal in the below of seal cover 6, overall sealing performance is better.

Further, be provided with discharge valve on pump head 2, discharge valve includes valve body 8 and case 9, has linked firmly damping sleeve 10 on the case 9, and has offered the air current way 11 that mutually supports and be the vertical structure between valve body 8 and the case 9, and damping sleeve 10 makes case 9 be fixed in valve body 8 and can rotate, when case 9 is rotatory and aligns with valve body 8's air current way 11, discharge valve is the open mode, when air current way 11 between them staggers each other, the clearance department is sealed through damping sleeve 10, discharge valve closes.

Furthermore, the connecting piece 4 is provided with a center hole 12, so that the connecting piece 4 can be conveniently processed, oil can be circulated, and the coaxiality of the inner part is prevented from being reduced when the inner part is rusted and then assembled after maintenance.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms electric motor 1, drive shaft 1a, pump head 2, pump shaft 2a, coupling 3, connecting piece 4, drive ring 5, sealing sleeve 6, sealing ring 7, valve body 8, valve spool 9, damping sleeve 10, gas flow channel 11, central bore 12, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims (4)

1. A connecting structure of an agricultural machinery oil supply pump comprises a motor (1), a pump head (2) and a shaft coupling (3), wherein a transmission shaft (1 a) of the motor (1) is connected with a pump shaft (2 a) of the pump head (2) through the shaft coupling (3), the shaft coupling (3) is of a left-right split structure and is formed through screw fastening, and the connecting structure is characterized in that a connecting piece (4) is clamped at the center of the shaft coupling (3), grooves in a circular truncated cone structure are formed in the upper end face and the lower end face of the connecting piece (4) and are respectively matched with the end faces of the transmission shaft (1 a) and the pump shaft (2 a), the transmission shaft (1 a) is meshed with the connecting piece (4) through oblique teeth, the contact face of the pump shaft (2 a) and the connecting piece (4) is of a smooth plane structure, a transmission ring (5) is clamped below the connecting piece (4) in the shaft coupling (3), and the outer ring of the transmission ring (, the pump shaft (2 a) penetrates through the center of the transmission ring (5) and is connected through a spline structure.

2. The connecting structure of the agricultural machinery oil supply pump according to claim 1, wherein a sealing sleeve (6) is arranged between the pump head (2) and the pump shaft (2 a), the sealing sleeve (6) is made of hard rubber, a sealing ring (7) is sleeved outside the sealing sleeve (6), and the sealing sleeve (6) and the pump head (2) are fastened through threaded fit.

3. The connecting structure of the agricultural machinery oil supply pump according to claim 1 or 2, wherein the pump head (2) is provided with an exhaust valve, the exhaust valve comprises a valve body (8) and a valve core (9), the valve core (9) is fixedly connected with a damping sleeve (10), and a gas flow channel (11) which is matched with each other to form a vertical structure is arranged between the valve body (8) and the valve core (9).

4. The connecting structure of an agricultural machinery fuel feed pump according to claim 1, characterized in that the connecting piece (4) is provided with a central hole (12).