A device for preventing a fuel injection pump from falling off

Abstract

The present invention discloses a device for preventing a fuel injection pump from falling off, relates to the technical field of engine assembly, and solves the technical problem of poor reliability of manual positioning. It comprises a positioning rod, on which at least two positioning pins are detachably mounted, a first supporting connecting rod is provided on one side of the positioning rod, a second supporting connecting rod is provided at the end of the first supporting connecting rod, and a front-to-back adjustable positioning assembly is provided at the end of the second supporting connecting rod. The present invention has a reasonable structure, is easy to use, and is simple and quick to operate, does not require manual positioning, has high reliability, effectively improves assembly efficiency, and meets production requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of engine assembly, and more particularly to a device for preventing a fuel injection pump from falling off. Background Art

[0002] In response to the National VI automobile emission standards, engines that meet the National VI standards are gradually becoming mature and moving towards mass production. At present, the assembly process for the fuel injection pump on the National VI engine K05 is as follows:

[0003] Step 1: Use 4 M10 bolts to fasten the fuel injection pump to the connecting plate;

[0004] Step 2: Use 4 M10 tooling bolts to pass through the connecting plate and the gear chamber cover, and use nuts to temporarily fix the fuel injection pump to the gear chamber cover;

[0005] Step 3: Assemble the gear train;

[0006] Step 4: Remove the tooling bolts and nuts in the second step, then assemble the flywheel housing, and pass the four M10 product bolts through the connecting plate and the gear chamber cover in turn, and finally tighten them on the flywheel housing to complete the installation of the fuel injection pump.

[0007] However, when removing the tooling bolts and nuts in the fourth step and preparing to replace them with product bolts, the fuel injection pump is in an unsupported state and can only be positioned by manpower. The manual positioning method has the risk of the fuel injection pump falling off and injuring people or damaging the fuel injection pump, and the problem of gear displacement caused by the movement of the fuel injection pump. This method is not reliable and has low assembly efficiency, which cannot meet production requirements. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide a device for preventing a fuel injection pump from falling off, which does not require manual positioning and has reliable positioning.

[0009] The technical solution of the present invention is: a device for preventing a fuel injection pump from falling off, comprising a positioning rod, on which at least two positioning pins are detachably installed, a first supporting link is provided on one side of the positioning rod, a second supporting link is provided at the end of the first supporting link, and a front-rear adjustable positioning assembly is provided at the end of the second supporting link.

[0010] As a further improvement, the positioning assembly includes a limiting screw, and the end of the second supporting connecting rod is provided with a screw hole, and the limiting screw is screwed on the screw hole.

[0011] Furthermore, a tightening block is provided at one end of the limiting screw.

[0012] Furthermore, the positioning pin is composed of an integrated threaded rod and a column. The positioning rod is provided with an insertion hole, and the threaded rod is inserted into the insertion hole. A locking nut is installed on the threaded rods on the upper and lower sides of the positioning rod, and the column is located below the positioning rod.

[0013] Furthermore, the plug-in hole is a long waist-shaped through hole.

[0014] Furthermore, a protective cover is provided on the column.

[0015] Furthermore, the first supporting link is hingedly connected to the second supporting link, and a stretching rod is provided between the first supporting link and the second supporting link.

[0016] Furthermore, a handle is provided above the positioning rod.

[0017] Furthermore, the first supporting connecting rod is a telescopic rod, and a counter-thrust bolt is provided on the first supporting connecting rod.

[0018] Beneficial Effects

[0019] The advantages of the present invention are: the positioning pin on the positioning rod is inserted into the mounting hole of the cylinder body to fix the device, and then the positioning assembly on the second supporting connecting rod acts on the fuel injection pump to position the fuel injection pump on the gear chamber cover, thereby realizing the positioning of the fuel injection pump and effectively preventing the fuel injection pump from falling off. The device does not require manual positioning, and is simple and fast to operate, and has reliable positioning. It not only solves the problem of the risk of the fuel injection pump falling off, but also effectively improves work efficiency, and well meets the production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a side structural schematic diagram of the present invention.

[0022] Among them: 1-positioning rod, 2-positioning pin, 3-first supporting connecting rod, 4-second supporting connecting rod, 5-limiting screw, 6-tightening block, 7-locking nut, 8-stretching rod, 9-handle, 21-threaded rod, 22-column. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the embodiments, but it does not constitute any limitation to the present invention. Any limited number of modifications made by anyone within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0024] See also Figure 1-Figure 2, a device for preventing a fuel injection pump from falling off of the present invention comprises a positioning rod 1, on which at least two positioning pins 2 are detachably installed, specifically two. A first supporting link 3 is provided on one side of the positioning rod 1, a second supporting link 4 is provided at the end of the first supporting link 3, and a front-rear adjustable positioning assembly is provided at the end of the second supporting link 4. When in use, the positioning rod 1 is placed on the cylinder body, and the positioning pin 2 is inserted into the mounting hole of the cylinder body, and the mounting hole is used to fix and position the device; then the positioning assembly is adjusted so that the positioning assembly effectively acts on the fuel injection pump, and the fuel injection pump is positioned on the gear chamber cover, thereby realizing the positioning of the fuel injection pump and effectively preventing the fuel injection pump from falling off. The device does not require manual positioning, and is simple and quick to operate, and has reliable positioning. It not only solves the problem of the risk of the fuel injection pump falling off, but also effectively improves the work efficiency, and well meets the production needs.

[0025] The positioning assembly includes a limit screw 5, and a screw hole is provided at the end of the second supporting connecting rod 4. The limit screw 5 is screwed on the screw hole, so that the limit screw 5 is adjustably installed on the second supporting connecting rod 4. When positioning the fuel injection pump, the limit screw 5 is rotated toward the fuel injection pump so that it is pressed against the end of the fuel injection pump, thereby positioning the fuel injection pump on the gear chamber cover. Specifically, a tightening block 6 is provided at one end of the limit screw 5, and the end face of the tightening block 6 is larger than the end face of the limit screw 5, so as to firmly tighten the fuel injection pump and improve the reliability of the device.

[0026] The positioning pin 2 is composed of an integrated threaded rod 21 and a column 22. The positioning rod 1 is provided with a plug-in hole, and the threaded rod 21 is plugged into the plug-in hole. A locking nut 7 is installed on the threaded rod 21 located on the upper and lower sides of the positioning rod 1. The column 22 is located below the positioning rod 1, so that the positioning pin 2 can be detachably installed on the positioning rod 1, which is convenient for the maintenance and replacement of the positioning pin 2. Preferably, the plug-in hole is a long waist-shaped through hole, so that the spacing between the positioning pins 2 can be adjusted, so that the device is suitable for different models, and the scope of application of the device is improved. Preferably, a protective cover is provided on the column 22 to protect the mounting hole. Since most of the mounting holes are threaded holes, if the positioning pin 2 is directly in rigid contact with the thread of the threaded hole, it is easy to cause the thread to deform. The protective effect of the protective cover can effectively avoid the occurrence of the above situation. Specifically, the protective cover is a plastic cover, which effectively protects the thread while ensuring the hardness and durability of the protective cover. Preferably, the end of the column 22 is a cone-shaped structure, so that the positioning pin 2 is easy to be inserted into the installation hole.

[0027] The first support link 3 is hingedly connected to the second support link 4, and a stretching rod 8 is provided between the first support link 3 and the second support link 4, so as to realize the swing of the second support link 4. Specifically, the first support link 3 and the second support link 4 are both hingedly connected to the stretching rod 8. By swinging the second support link 4, the limit screw 5 can be moved to a suitable tightening position to better tighten the injection pump. Preferably, the first support link 3 is a telescopic rod, and a reverse top bolt is provided on the first support link 3. Specifically, the first support link 3 includes an inner rod and an outer rod, the inner rod is inserted into the outer rod, and the inner rod is positioned by the reverse top bolt provided on the outer rod. One end of the outer rod is connected to the positioning rod 1, and one end of the inner rod is connected to the second support link 4. The scope of application of the device is further improved by the telescopic first support link 3.

[0028] A handle 9 is provided above the positioning rod 1 of this embodiment for easy operation.

[0029] The working principle of the present invention is: place the positioning rod 1 on the cylinder body, and insert the positioning pin 2 into the mounting hole of the cylinder body, and use the mounting hole to fix the device in position; then adjust the first supporting link 3 and the second supporting link 4 to the appropriate position, and then rotate the limiting screw 5 so that the limiting screw 5 presses the injection pump against the gear chamber cover, thereby realizing the positioning of the injection pump and effectively preventing the injection pump from falling off.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A device for preventing a fuel injection pump from falling off, characterized in that: The invention comprises a positioning rod (1), on which at least two positioning pins (2) are detachably mounted, a first supporting link (3) is provided on one side of the positioning rod (1), a second supporting link (4) is provided at the end of the first supporting link (3), and a front-rear adjustable positioning assembly is provided at the end of the second supporting link (4); The positioning pin (2) is composed of an integrated threaded rod (21) and a column (22); the positioning rod (1) is provided with a plug hole, the threaded rod (21) is plugged into the plug hole, a locking nut (7) is installed on the threaded rod (21) located on the upper and lower sides of the positioning rod (1), and the column (22) is located below the positioning rod (1); A protective sleeve is sleeved on the column (22); The positioning assembly comprises a limiting screw (5), the end of the second supporting connecting rod (4) is provided with a screw hole, and the limiting screw (5) is screwed onto the screw hole; A tightening block (6) is provided at one end of the limiting screw (5); The first supporting link (3) is hingedly connected to the second supporting link (4), and a stretching rod (8) is provided between the first supporting link (3) and the second supporting link (4); The first supporting connecting rod (3) is a telescopic rod, and a counter-bolt is provided on the first supporting connecting rod (3).

2. A device for preventing a fuel injection pump from falling off according to claim 1, characterized in that: The plug-in hole is a long waist-shaped through hole.

3. The device for preventing a fuel injection pump from falling off according to claim 1, characterized in that: A handle (9) is provided above the positioning rod (1).

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