Fuel oil delivery pump convenient to disassemble and assemble

Abstract

The fuel oil delivery pump convenient to disassemble and assemble comprises a pump body and a shell arranged on the pump body in a sleeved mode, one end of the pump body is detachably connected with a connector, and an opening allowing the connector to be locally placed in the pump body is formed in the position, corresponding to the connector, of one end of the pump body. A connecting structure used for enabling the outer shell and the pump body to be detachably connected is arranged between the inner circumferential wall of the outer shell and the outer circumferential wall of the pump body, and a buckling piece used for being buckled on the outer circumferential wall of the connector in an abutting mode is detachably arranged between the pump body and the outer shell. The utility model solves the problem that the end part of the traditional pump body is hermetically connected with the joint through riveting, so that the pump body is difficult to disassemble and assemble during later repair or maintenance.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel pumps, in particular to a fuel delivery pump that is easy to assemble and disassemble. Background Art

[0002] A fuel transfer pump is a pump body that ensures diesel circulation in a low-pressure oil circuit and supplies sufficient fuel at a certain pressure to the injection pump. It is usually composed of an outer shell and a pump body, with a joint connected to one end of the pump body. The end of a traditional pump body needs to be riveted to reduce the space between the end of the pump body and the outer wall of the joint and prevent the joint from falling out. However, during the later repair or maintenance of the pump body, the riveting makes it difficult to separate the pump body and the joint, thereby affecting the repair and maintenance efficiency. At the same time, the riveted part is annular and has a certain inclination angle, making it difficult for maintenance personnel to lift the riveted part and cause the joint to fall out of the pump body or to repair the connection between the joint and the pump body. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the utility model provides an easy-to-disassemble fuel transfer pump to solve the problem that the traditional pump body end and the joint are sealed by riveting, which makes the pump body difficult to disassemble and assemble during later repair or maintenance.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a fuel transfer pump that is easy to disassemble and assemble, including a pump body and an outer shell mounted on the pump body, one end of the pump body is detachably connected to a joint, and an opening is provided at one end of the pump body corresponding to the position of the joint for partially inserting the joint into the inside of the pump body, a connecting structure for detachably connecting the outer shell and the pump body is provided between the inner peripheral wall of the outer shell and the outer peripheral wall of the pump body, and a buckling piece for buckling on the outer peripheral wall of the joint is detachably provided between the pump body and the outer shell.

[0005] The benefits of adopting the above technical solution are: in the above technology, a detachable connection between the outer shell and the pump body is achieved through a connecting structure to facilitate subsequent maintenance of the pump body and the joint, thereby improving the disassembly and assembly efficiency; the buckling part is set to buckle on the outer peripheral wall of the joint to prevent the joint from falling out of the pump body along the axial direction of the pump body, thereby improving the connection strength between the joint and the pump body.

[0006] The utility model further provides that: the connection structure includes a first thread groove annularly opened on the inner peripheral wall of the shell and a second thread groove annularly opened on the outer peripheral wall of the pump body, and the first thread groove and the second thread groove are threadedly connected.

[0007] The benefit of adopting the above technical solution is that: in the above technology, the pump body and the shell are detachably connected through the threaded connection of the first thread groove and the second thread groove, thereby improving the disassembly and assembly efficiency, and facilitating the later disassembly, repair and maintenance of the pump body and the joint.

[0008] The present invention is further provided with: the connecting structure includes a first sealing surface annularly opened on the outer peripheral wall of one end portion of the pump body, the radial cross-section of the first sealing surface is stepped, a sealing gap is formed between the first sealing surface and the inner peripheral wall of the outer shell, the fastener includes a connecting ring filling the sealing gap, the inner peripheral wall surface of the connecting ring is a second sealing surface for abutting and cooperating with the first sealing surface, the radial cross-section of the second sealing surface is stepped, the connecting ring is bent toward the outer peripheral wall of the joint to have a plurality of riveted plates for external riveting equipment to punch to buckle on the outer peripheral wall of the joint, the plurality of riveted plates are arranged in a ring shape and a deformation gap is formed between adjacent riveted plates.

[0009] The advantages of adopting the above technical solution are as follows: in the above technology, before the outer shell is connected to the pump body, the connecting ring is first placed on one end of the pump body so that the second sealing surface abuts against the first sealing surface, thereby preventing the connecting ring from shaking or loosening due to external axial loads, and then the outer shell is screwed in so that the outer shell and the pump body are threaded together, and the connecting ring is used to fill the sealing gap so that after the outer shell is screwed in, the inner circumferential wall of the outer shell is outside the outer circumferential wall of the connecting ring, thereby preventing the connecting ring from shaking and loosening due to external radial loads, and then the riveting plates are punched by the stamping equipment so that several riveting plates are riveted on the outer circumferential wall of the joint, and the joint is limited by the combined clamping of the riveting plates arranged in a ring to prevent the joint from shaking or loosening along its radial direction. Loosening phenomenon; in the above technology, due to the deformation gap formed between adjacent riveted plates, when the joint needs to be repaired or disassembled later, the disassembly tool is placed in the deformation gap and the riveted plate is pried from the side of the riveted plate to achieve the removal of the riveted plate, so that the riveted plate no longer restricts the joint; compared with the traditional riveted structure between the pump body and the joint, which is a circular ring-shaped structure with an inclined surface, the setting of the deformation gap in this technology facilitates the insertion of the disassembly end of the disassembly tool, and at the same time exposes the maintenance vision and space to the maintenance personnel without having to disassemble the joint, thereby facilitating the maintenance personnel to repair the connection between the joint and the pump body, while the traditional circular ring-shaped riveted structure makes it impossible for the operator to pry the riveted structure by the disassembly tool to achieve disassembly or repair of the joint.

[0010] The utility model is further provided with: a third thread groove for threaded connection with the first thread groove is provided on the top wall of the connecting ring.

[0011] The benefits of adopting the above technical solution are: after the connecting ring is installed, the operator continues to screw into the outer shell so that the first thread groove is threadedly connected to the third thread groove, thereby fixing the connecting ring, thereby improving the connection strength of the connecting ring between the outer shell and the pump body. At the same time, when the diameter of the joint is too small, the riveting plate and the joint can be separated by unscrewing the outer shell and pushing the connecting ring along the axial direction of the joint, so that maintenance personnel can repair and maintain the joint and pump body, thereby improving maintenance efficiency and disassembly efficiency.

[0012] The utility model is further configured as follows: a connecting hole is provided on the connecting ring, a matching hole is provided on the outer shell at a position corresponding to the connecting hole, and a connecting bolt is threadedly connected between the connecting hole and the matching hole.

[0013] The benefit of adopting the above technical solution is that the detachable connection of the connecting ring is achieved by threading the connecting bolts with the connecting hole and the matching hole respectively, which makes it easy for maintenance personnel to remove the outer shell and the connecting ring to achieve disassembly and maintenance between the joint and the pump body.

[0014] The present invention is further provided with: a sealing gasket is provided between the bottom wall of the riveted plate and the outer peripheral wall of the joint, and the sealing gasket is made of an elastic sealing material.

[0015] The benefit of adopting the above technical solution is that the provision of the sealing gasket in the above technology further increases the friction torque between the riveted plate and the joint, while increasing the fitting strength between the two, thereby increasing the limiting strength of the joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a simplified cross-sectional view of the utility model;

[0017] Figure 2 for Figure 1 A partial enlarged view of part A;

[0018] Figure 3 This is a simplified front view of the assembled state of several riveted plates in the present invention. DETAILED DESCRIPTION

[0019] The utility model provides a fuel delivery pump that is easy to disassemble and assemble, including a pump body 1 and a shell 2 arranged on the pump body 1, one end of the pump body 1 is detachably connected to a joint 11, and an opening for partially inserting the joint 11 into the interior of the pump body 1 is opened at the position corresponding to the joint 11 at one end of the pump body 1, a connecting structure for detachably connecting the shell 2 and the pump body 1 is provided between the inner peripheral wall of the shell 2 and the outer peripheral wall of the pump body 1, and a buckling piece for buckling on the outer peripheral wall of the joint 11 is detachably provided between the pump body 1 and the shell 2, the connecting structure includes a first thread groove 21 circumferentially arranged on the inner peripheral wall of the shell 2 and a second thread groove 12 circumferentially arranged on the outer peripheral wall of the pump body 1, the first thread groove 21 and the second thread groove 12 are threadedly connected, the connecting structure includes a first sealing surface 13 circumferentially arranged on the outer peripheral wall of one end of the pump body 1, the radial cross-section of the first sealing surface 13 is stepped, and the first sealing surface 13 is connected to the inner peripheral wall of the shell 2 A sealing gap is formed between the peripheral walls, and the buckle includes a connecting ring 3 that fills the sealing gap. The inner peripheral wall surface of the connecting ring 3 is a second sealing surface 31 for abutting and cooperating with the first sealing surface 13. The radial cross-section of the second sealing surface 31 is arranged in a stepped shape. The connecting ring 3 is bent toward the outer peripheral wall of the joint 11 to have several riveted plates 32 for external riveting equipment to punch and buckle on the outer peripheral wall of the joint 11. Several of the riveted plates 32 are arranged in a ring shape and a deformation gap is formed between adjacent riveted plates 32. A third thread groove 33 for threaded connection with the first thread groove 21 is provided on the top wall of the connecting ring 3. A connecting hole 34 is provided on the connecting ring 3, and a matching hole 22 is provided on the outer shell 2 at a position corresponding to the connecting hole 34. A connecting bolt 35 is threadedly connected between the connecting hole 34 and the matching hole 22. A sealing gasket is provided between the bottom wall of the riveted plate 32 and the outer peripheral wall of the joint 11, and the sealing gasket is made of an elastic sealing material.

[0020] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A removable fuel transfer pump comprising a pump body and a housing sleeved on the pump body, wherein one end of the pump body is detachably connected to a connector, and an opening is provided at one end of the pump body corresponding to the position of the connector for partially inserting the connector into the pump body, characterized in that: A connection structure for detachably connecting the shell and the pump body is provided between the inner peripheral wall of the shell and the outer peripheral wall of the pump body, and a buckling piece for buckling on the outer peripheral wall of the joint is detachably provided between the pump body and the shell.

2. The easily detachable fuel pump according to claim 1, characterized in that: The connection structure includes a first thread groove annularly provided on the inner peripheral wall of the shell and a second thread groove annularly provided on the outer peripheral wall of the pump body, and the first thread groove and the second thread groove are threadedly connected.

3. The easily detachable fuel pump according to claim 2, characterized in that: The connecting structure includes a first sealing surface annularly opened on the outer peripheral wall of one end portion of the pump body, the radial cross-section of the first sealing surface is stepped, a sealing gap is formed between the first sealing surface and the inner peripheral wall of the shell, the buckle includes a connecting ring filling the sealing gap, the inner peripheral wall surface of the connecting ring is a second sealing surface for abutting and cooperating with the first sealing surface, the radial cross-section of the second sealing surface is stepped, the connecting ring is bent toward the outer peripheral wall of the joint to have a plurality of riveted plates for external riveting equipment to punch and buckle on the outer peripheral wall of the joint, the plurality of riveted plates are arranged in a ring shape and a deformation gap is formed between adjacent riveted plates.

4. The easily detachable fuel pump according to claim 3, characterized in that: The top wall of the connecting ring is provided with a third thread groove for threaded connection with the first thread groove.

5. The easily detachable fuel pump according to claim 3, characterized in that: The connecting ring is provided with a connecting hole, the outer shell is provided with a matching hole at a position corresponding to the connecting hole, and a connecting bolt is threadedly connected between the connecting hole and the matching hole.

6. The easily detachable fuel pump according to claim 3, characterized in that: A sealing gasket is provided between the bottom wall of the riveting plate and the outer peripheral wall of the joint, and the sealing gasket is made of elastic sealing material.

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