Disassembling tool for common rail pump tappet clamping ring and pulling method for clamping ring

Abstract

The invention discloses a common rail pump tappet clamping ring dismounting tool and a clamping ring pulling method, the dismounting tool comprises a positioning sleeve and a tightening screw, when the dismounting tool is used, the positioning sleeve is arranged on a tappet part in a sleeving mode, the tightening screw is screwed into a thread of the positioning sleeve, along with continuous screwing-in of the tightening screw, the head of the screw abuts against the clamping ring, and the clamping ring is pulled out. And the clamping ring is gradually ejected out of the tappet groove, and finally, the clamping ring is easily taken out through needle-nose pliers. By means of the design tool, the disassembly and assembly time is saved, tappet parts are prevented from being damaged in the disassembly and assembly process, and meanwhile the requirement for the skill level of workers in the prior art is lowered.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-pressure common rail pump assembly, in particular to a common rail pump tappet collar dismounting tool and collar pulling method. BACKGROUND

[0002] With the continuous development of diesel engine technology, the power density index of diesel engine is getting higher and higher, and the performance requirements of the "heart" of diesel engine, fuel supply system, are also getting higher and higher. The high-pressure common rail fuel injection system is an effective means to provide high power density index for diesel engine with its high pressure, flexible adjustment and other characteristics. The high-pressure common rail pump is an important part of the high-pressure common rail system, and its performance directly determines the pressure in the common rail and the pressure fluctuation and other important parameters affecting the performance of the high-pressure common rail fuel injection system.

[0003] The plunger tappet part of a certain type of high-pressure common rail pump needs to use a collar to press the plunger disc tightly to prevent the plunger disc from being separated from the plunger during high-speed reciprocating motion. Due to the limitation of design space size structure, the collar structure cannot add "ears", and the installation and pulling of the collar cannot be realized through a collar clamp. During the first disassembly of the high-pressure common rail pump plunger tappet part, due to the lack of special tooling, on-site assembly can only use a flat screwdriver to slowly pull it out. Since the collar has high rigidity, a large pulling force is required, which requires workers to have high operating skills and must adjust the screwdriver pull-out position repeatedly to slowly pull the collar out of the tappet groove. When the collar is pulled out using this method, the efficiency is very low, and since the tappet part has a thin wall, this method is easy to damage the tappet, affecting the secondary assembly of the tappet part.

[0004] Therefore, there is an urgent need for a more efficient and quick disassembly tool to quickly disassemble and assemble the high-pressure common rail pump tappet collar. SUMMARY

[0005] The purpose of the present application is to provide a common rail pump tappet collar dismounting tool and collar pulling method. The tappet collar is disassembled and assembled by using the collar pulling tool. First, the positioning sleeve is placed on the tappet part, and the tightening screws are screwed into the threads of the positioning sleeve. As the tightening screws are continuously screwed in, the screw heads push against the collar and gradually push the collar out of the tappet groove. Finally, the collar is easily removed using a pointed pliers. The use of this design tool not only saves disassembly time, but also avoids damage to the tappet part during disassembly.

[0006] To achieve the above purpose, the present application provides a common rail pump tappet collar dismounting tool, which comprises:

[0007] The positioning sleeve is a cylindrical structure with two ends penetrating, the inner diameter specification of the cylindrical structure is matched with the outer diameter specification of the ring at the tappet groove of the common rail pump, and the lateral surface of the body of the cylindrical structure is provided with a plurality of penetrating threaded holes, the plurality of threaded holes are located on the circumference of the circular section of the cylindrical structure, and the center of the circular section is located on the central axis of the cylindrical structure; the tightening screw is provided with one end of a top rod inserted into the threaded hole of the positioning sleeve.

[0008] The central axis of the positioning sleeve is coincided with the central axis of the ring of the tappet of the common rail pump, the threaded hole is corresponded to the internal threaded hole of the ring groove of the tappet of the common rail pump, the tightening screw is screwed into the threaded hole of the positioning sleeve and then penetrates into the internal threaded hole of the ring groove, so as to contact the ring in the ring groove.

[0009] According to the embodiment of the present application, the positioning sleeve is a tool elastic positioning sleeve, and the elastic positioning sleeve is a composite structure with an outer steel sleeve and an inner rubber layer.

[0010] According to the embodiment of the present application, the positioning sleeve is provided with two threaded holes, and the included angle between the two threaded holes is 55°.

[0011] According to the embodiment of the present application, the ring is provided with an opening, and the internal threaded holes of the ring groove corresponding to the threaded holes of the positioning sleeve are respectively located on the two sides of the opening.

[0012] According to the embodiment of the present application, the opening size of the ring is 10 mm.

[0013] According to the embodiment of the present application, the outer diameter of the positioning sleeve is 55 mm, the inner diameter of the upper part of the positioning sleeve is 36 mm, and the inner diameter of the bottom part of the positioning sleeve is 39.3 mm.

[0014] According to the embodiment of the present application, the part with the inner diameter of 39.3 mm in the positioning sleeve is higher than half of the height of the positioning sleeve.

[0015] According to the embodiment of the present application, the central axis of the threaded hole on the positioning sleeve is located on the transverse central axis surface of the positioning sleeve.

[0016] Another aspect of the present application discloses a pulling method of the ring of the tappet of the common rail pump, which adopts the dismounting tool of the ring of the tappet of the common rail pump as described above, and comprises the following steps.

[0017] S1: the positioning sleeve is sleeved on the top of the tappet component provided with the ring, so that the threaded hole of the positioning sleeve is aligned with the internal threaded hole of the ring groove;

[0018] S2: the tightening screws are respectively screwed into the threaded holes of the positioning sleeve, the head of the tightening screw abuts against the ring as the tightening screw is continuously screwed in, and the ring is gradually pushed out of the tappet groove, and finally the ring is easily taken out by using the pointed pliers.

[0019] The beneficial effects of the technical scheme of the present application relative to the prior art are as follows:

[0020] The dismounting tool for the common rail pump tappet collar of the application comprises a positioning sleeve and a tightening screw. In use, the positioning sleeve is first placed on the tappet part, and the tightening screw is screwed into the thread of the positioning sleeve. As the tightening screw is screwed in, the head of the screw pushes against the collar and gradually pushes the collar out of the tappet groove. Finally, the collar is easily removed using a needle-nose pliers. The use of the designed tool not only saves dismounting time, but also avoids damage to the tappet part during dismounting, reduces the skill level requirement for workers, and avoids the defects of excessive reliance on manual work in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a front view of a dismounting tool for a common rail pump tappet collar according to an example of the application;

[0022] Figure 2 is a side view of a dismounting tool for a common rail pump tappet collar according to an example of the application; Figure 1 is a cross-sectional view along the AA direction;

[0023] Figure 3 is a cross-sectional view along the BB direction; Figure 2

[0024] Figure 4 is a cross-sectional view of a dismounting tool for a common rail pump tappet collar according to an example of the application when applied to the tappet collar;

[0025] Figure 5 is a cross-sectional view along the CC direction; Figure 4

[0026] The reference signs are explained as follows:

[0027] 1. collar, 2. tappet, 3. tappet washer, 10. positioning sleeve, 11. threaded hole, 20. tightening screw, 111. push rod.

[0028] Wherein a is the inner diameter of the upper part of the positioning sleeve, and b is the inner diameter of the lower part of the positioning sleeve. DETAILED DESCRIPTION

[0029] The application will be further described below in conjunction with the drawings and specific examples. The following examples are used to illustrate the application, but are not used to limit the scope of the application.

[0030] Please refer to Figures 1 to 5 ​​As shown, the present application shows a dismounting tool for a common rail pump tappet collar, which comprises a positioning sleeve 10 and a tightening screw. In use, the positioning sleeve 10 is sleeved on the tappet 2 component, and the tightening screw 20 is screwed into the thread of the positioning sleeve 10, respectively. With the continuous screwing of the tightening screw 20, the screw head top of the tightening screw 20 pushes against the collar 1, and gradually pushes the collar 1 out of the tappet groove. Finally, the collar 1 is easily taken out by using the needle-nose pliers. The use of the designed tool not only saves the dismounting time, but also avoids the damage to the tappet parts during the dismounting process, and at the same time, reduces the skill level requirement of the existing technology for the workers.

[0031] In the embodiment, the positioning sleeve 10 is a cylindrical structure with both ends penetrating, the inner diameter specification of the cylindrical structure is matched with the outer diameter specification of the common rail pump tappet collar, and the body side of the cylindrical structure is provided with a plurality of penetrating threaded holes 11. The plurality of threaded holes 11 are located on the circumference of the circular section of the cylindrical structure, and the center of the circular section is located on the central axis of the cylindrical structure.

[0032] Specifically, the central axis of the positioning sleeve 10 coincides with the central axis of the collar 1 of the common rail pump tappet; the threaded hole 11 corresponds to the internal threaded hole of the collar groove of the common rail pump tappet, the tightening screw 20 is screwed into the threaded hole 11 of the positioning sleeve 10, and then penetrates into the internal threaded hole of the collar groove, so as to contact the collar 1 in the collar groove.

[0033] In the embodiment, as shown in Figure 4 , Figure 5 , the tightening screw 20, one end of the top rod 111 is inserted into the threaded hole 11 of the positioning sleeve 10, and the top rod 111 is convenient to extend into the internal threaded hole of the collar groove and apply force to the collar 1.

[0034] Specifically, as shown in Figure 4 , the collar 1 is embedded in the collar groove, the collar groove is formed by the tappet 2 and the tappet washer 3, and the internal threaded hole of the collar groove is provided on the tappet 2.

[0035] Specifically, as shown in the figure, the outer diameter of the positioning sleeve 10 is 55mm, the inner diameter a of the upper part of the positioning sleeve 10 is 36mm, and the inner diameter b of the bottom of the positioning sleeve 10 is 39.3mm. The part with the inner diameter of 39.3mm of the positioning sleeve 10 is higher than half of the height of the positioning sleeve 10. Such design corresponds to the shape of the common rail pump tappet structure, which is convenient for the positioning sleeve 10 to be sleeved into the position where the common rail pump tappet structure is provided with the collar 1.

[0036] Specifically, the positioning sleeve 10 can also be a tool elastic positioning sleeve. The elastic positioning sleeve is a composite structure with an outer steel sleeve and an inner rubber layer. The steel provides strength, and the rubber provides elasticity and friction reduction. It is the core element of oil-free lubrication, vibration reduction and fast tightening.

[0037] Specifically, the positioning sleeve 10 has two threaded holes 11, and the included angle between the two threaded holes 11 is 55°. The retaining ring 1 has an opening, and the internal threaded holes of the retaining ring groove corresponding to the threaded holes 11 on the positioning sleeve 10 are located on both sides of the opening.

[0038] Specifically, the opening size of the retaining ring 1 is 10mm.

[0039] Specifically, the central axis of the threaded hole 11 on the positioning sleeve 10 is located on the transverse central axis surface of the positioning sleeve 10, that is, the threaded hole 11 is set at the middle height of the positioning sleeve 10.

[0040] Another aspect of this application discloses a method for removing the tappet retaining ring of a high-pressure common rail pump, which employs the above-mentioned disassembly tooling for the common rail pump tappet retaining ring, including the following steps:

[0041] S1: Place the positioning sleeve 10 on the top of the tappet component where the retaining ring 1 is located, so that the threaded hole 11 of the positioning sleeve 10 is aligned with the internal threaded hole of the retaining ring groove.

[0042] S2: Screw the tightening screws 20 into the threads of the positioning sleeve 10. As the tightening screws 20 are screwed in, the head of the tightening screws 20 presses against the retaining ring 1 and gradually pushes the retaining ring 1 out of the pusher groove. Finally, use needle-nose pliers to easily remove the retaining ring 1.

[0043] In summary, the technical solution of this application has the following beneficial effects:

[0044] The disassembly fixture for the tappet retaining ring of a common rail pump disclosed in this application includes a positioning sleeve and tightening screws. In use, the positioning sleeve is first placed on the tappet component, and then the tightening screws are screwed into the threads of the positioning sleeve. As the screws are screwed in, the screw heads press against the retaining ring, gradually pushing it out of the tappet groove. Finally, the retaining ring is easily removed using needle-nose pliers. This fixture design saves disassembly and assembly time, avoids damage to the tappet components during disassembly and assembly, and reduces the skill requirements for workers, avoiding the over-reliance on manual labor in existing technologies.

[0045] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A disassembly tooling for a common rail pump tappet retaining ring, characterized in that, include: The positioning sleeve is a cylindrical structure that extends through both ends. The inner diameter of the cylindrical structure is compatible with the outer diameter of the common rail pump tappet retainer. The cylindrical structure has several through threaded holes on its side. These threaded holes are located on the circumference of the circular cross-section of the cylindrical structure, and the center of the circular cross-section is located on the central axis of the cylindrical structure. Tighten the screw, and insert the end with the push rod into the threaded hole of the positioning sleeve; The central axis of the positioning sleeve coincides with the central axis of the retaining ring of the common rail pump tappet; The threaded hole corresponds to the internal threaded hole of the retaining ring groove of the common rail pump tappet. The tightening screw is screwed into the threaded hole of the positioning sleeve and then through the internal threaded hole of the retaining ring groove, thereby contacting the retaining ring in the retaining ring groove.

2. The disassembly tooling for a common rail pump tappet retaining ring according to claim 1, characterized in that, The positioning sleeve is a tooling elastic positioning sleeve, which is a composite structure with an outer steel sleeve and an inner rubber layer.

3. The disassembly fixture for a common rail pump tappet retaining ring according to claim 1, characterized in that, The positioning sleeve has two threaded holes, and the included angle between the two threaded holes is 55°.

4. The disassembly tooling for a common rail pump tappet retaining ring according to claim 3, characterized in that, The retaining ring has an opening, and the internal threaded holes of the retaining ring groove corresponding to the threaded holes on the positioning sleeve are located on both sides of the opening.

5. The disassembly fixture for a common rail pump tappet retaining ring according to claim 4, characterized in that, The opening size of the retaining ring is 10mm.

6. The disassembly tooling for a common rail pump tappet retaining ring according to claim 1, characterized in that, The outer diameter of the positioning sleeve is 55mm, the inner diameter of the upper part of the positioning sleeve is 36mm, and the inner diameter of the bottom of the positioning sleeve is 39.3mm.

7. The disassembly fixture for a common rail pump tappet retaining ring according to claim 1, characterized in that, The portion of the positioning sleeve with an inner diameter of 39.3 mm is higher than half the height of the positioning sleeve.

8. The disassembly fixture for a common rail pump tappet retaining ring according to claim 1, characterized in that, The central axis of the threaded hole on the positioning sleeve is located on the transverse central axis surface of the positioning sleeve.

9. A method for removing the tappet retaining ring of a high-pressure common rail pump, comprising a disassembly fixture for a common rail pump tappet retaining ring as described in any one of claims 1-8, characterized in that, Includes the following steps: S1: Place the positioning sleeve on the top of the tappet component where the retaining ring is located, so that the threaded hole of the positioning sleeve is aligned with the internal threaded hole of the retaining ring groove. S2: Screw the tightening screws into the threads of the positioning sleeve. As the tightening screws are screwed in, the head of the tightening screw presses against the retaining ring and gradually pushes the retaining ring out of the tappet groove. Finally, use needle-nose pliers to easily remove the retaining ring.

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