CN115401651A - An engine piston circlip pressing tool - Google Patents

Abstract

The invention relates to the technical field of engine production, in particular to a tool for pressing an engine piston circlip, which includes an indenter, which is in the shape of a cylinder, and has a hollow inner cavity along the axial direction, including an upper body of the indenter and an indenter The lower body, the lower body of the indenter can be in contact with the piston pin; the mandrel, which is arranged in the hollow inner cavity corresponding to the upper body of the indenter, and is slidably connected with the hollow inner cavity, and each side of the lower end of the mandrel is provided with a spring Tightening plate, the first end of the tensioning plate is rotatably connected to the mandrel, the second end abuts against the inner wall of the hollow cavity under the elastic force of the spring arranged between the two tensioning plates, and the piston circlip can Set in the hollow inner cavity corresponding to the lower body of the indenter, and enter the piston pin under the push of the tensioner plate, this assembly tool has the advantages of simple operation, high reliability and low cost, and can avoid engine failure caused by misoperation Situation happens.

Description

An engine piston circlip pressing tool

technical field

The invention relates to the technical field of engine production, in particular to an engine piston circlip pressing tool.

Background technique

The engine piston circlip is an important organizational part of the engine and plays a vital role in the engine. When assembling the piston circlip, it is necessary to make the circlip smaller in diameter by external force before it can be loaded into the piston pin hole, and then expand and fit tightly in the circlip ring groove by the circlip spring itself. At present, the one-shaped tool changing tool is used to pry the circlip into the circlip groove. On the one hand, both the circlip and the one-shaped tool changing tool are easy to scratch the inner wall of the piston pin hole. On the other hand, there is still a certain degree of Potential safety hazard, and the circlip assembly is not in place.

Contents of the invention

The object of the present invention is to provide an engine piston circlip pressing tool to solve the problems pointed out in the background technology.

The embodiment of the present invention is achieved through the following technical solutions: a tool for pressing the circlip of an engine piston, including: a pressure head, which is in the shape of a cylinder, and has a hollow inner cavity along the axial direction, including an upper body of the pressure head and a lower body of the pressure head , the lower body of the indenter can be in contact with the piston pin;

The mandrel is arranged in the hollow inner cavity corresponding to the upper body of the indenter and is slidably connected with the hollow inner cavity. A tensioning plate is arranged on both sides of the lower end of the mandrel. The first end of the tensioning plate is connected to the The mandrel is rotatably connected, and the second end abuts against the inner wall of the hollow cavity under the elastic force of the spring arranged between the two tensioning plates. Pushed by the tensioner plate into the piston pin.

According to a preferred embodiment, the hollow inner cavity corresponding to the lower body of the indenter is a tapered segment with gradually smaller diameter.

According to a preferred embodiment, the lower end of the mandrel is provided with a through hole along the vertical direction of the pressure head, the spring is arranged in the through hole, and its two ends are respectively connected with the tensioning plate.

According to a preferred embodiment, the lower end of the lower body of the indenter is provided with an outer contour, and the outer contour matches the ring groove of the piston pin.

According to a preferred embodiment, the mandrel is composed of a first section and a second section provided with a tensioning plate, and the diameter of the first section is larger than that of the second section.

According to a preferred embodiment, the two tension plates and the second section jointly form a cylindrical shape.

According to a preferred embodiment, the upper end of the hollow cavity is provided with a limiting section, and the limiting block on the first section is limited in the limiting section.

According to a preferred embodiment, an end cover is provided at the upper end of the upper body of the indenter, and the end cover is detachably connected to the upper body of the indenter.

According to a preferred embodiment, a gap is opened at the lower end of the upper body of the indenter.

The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects: the assembly tool provided by the present invention, after the circlip is loaded into the tool, inserts the lower body of the indenter into the piston pin hole, and further pushes the mandrel. During the process, under the action of the spring, the tensioning plate has been closely attached to the inner wall of the hollow cavity, and the circlip pushed by the tensioning plate is changed in diameter through the hollow cavity corresponding to the lower body of the indenter, and the circlip is pushed to the piston. After the circlip ring groove is in place, it expands by its own elasticity and fits tightly in the circlip ring groove to complete the assembly. It has the advantages of simple operation, high reliability and low cost, and can avoid engine failure caused by misoperation. occur.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of the assembly tool provided by Embodiment 1 of the present invention;

Fig. 2 is a schematic diagram of the internal structure of the upper body of the indenter provided by Embodiment 1 of the present invention;

FIG. 3 is a schematic structural view of the mandrel provided in Embodiment 1 of the present invention;

Fig. 4 is a sectional view of the assembly tool provided by Embodiment 1 of the present invention;

Icons: 1-Indenter upper body, 2-Indenter lower body, 3-Hollow inner cavity, 4-Mandrel, 5-Tightening plate, 6-Piston pin, 7-Reducing section, 8-Through hole, 9- Spring, 10-outer contour, 11-clip ring groove, 12-limiting section, 13-limiting block, 14-end cover, 15-notch.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Example 1

Referring to FIG. 1 , FIG. 1 is a schematic diagram of the overall structure of an assembly tool provided by an embodiment of the present invention.

The embodiment of the present invention provides an engine piston circlip pressing tool, including: a pressure head, which is cylindrical, and has a hollow inner cavity 3 along the axial direction, including an upper body 1 of the pressure head and a lower body 2 of the pressure head. The lower body 2 of the indenter can be in contact with the piston pin 6; the mandrel 4 is arranged in the hollow inner cavity 3 corresponding to the upper body 1 of the indenter, and is slidably connected with the hollow inner cavity 3;

As shown in Fig. 2, a tensioning plate 5 is arranged on both sides of the lower end of the mandrel 4, the first end of the tensioning plate 5 is rotatably connected with the mandrel 4, and the second end is arranged on two tensioning plates. The elastic force of the spring 9 between the plates 5 abuts against the inner wall of the hollow inner cavity 3, and the piston circlip can be set in the hollow inner cavity 3 corresponding to the lower body 2 of the indenter, and enters into the piston under the push of the tensioning plate 5 pin 6. In one implementation of the embodiment of the present invention, after installing the circlip into the hollow inner cavity 3 corresponding to the lower body 2 of the indenter, insert the lower body 2 of the indenter into the hole of the piston pin 6 to further push the mandrel 4, During the pushing process, under the action of the spring 9, the tensioning plate 5 has been closely attached to the inner wall of the hollow cavity 3, and the circlip pushed by the tensioning plate 5 is changed in diameter through the hollow cavity 3 corresponding to the lower body 2 of the pressure head. After the circlip is pushed to the position of the piston circlip ring groove 11, it expands by its own elastic force and fits tightly in the circlip ring groove 11 to complete the assembly. It has the advantages of simple operation, high reliability and low cost. It can avoid the occurrence of engine failure caused by operating errors.

Further, the hollow inner cavity 3 corresponding to the lower body 2 of the indenter is a diameter-reducing section 7 whose diameter gradually decreases, and the piston circlip passes through the diameter-reducing section 7 under the action of an external force, thereby realizing the diameter reduction, instead of The traditional method of prying the piston circlip into the circlip groove by changing the knife can avoid the situation that the inner wall of the 6 holes of the piston pin will be scratched by the knife.

Further, referring to Fig. 3 and Fig. 4, the lower end of the mandrel 4 is provided with a through hole 8 along the vertical direction of the indenter, and the spring 9 is arranged in the through hole 8, and its two ends are connected with the tensioning plate respectively. 5 connection, the two tensioning plates 5 are closely attached to the inner wall of the hollow cavity 3 under the elastic force of the spring 9, and after entering the lower body 2 of the pressure head 2, the compression spring 9 is reduced in diameter, and the piston circlip Smoothly push into the circlip ring groove 11 position; when the piston circlip is successfully assembled, it withdraws, and resets under the elastic force of the spring 9, and closely fits the inner wall of the hollow cavity 3 again to facilitate the smooth progress of the next assembly work.

Further, the lower end of the lower body 2 of the indenter is provided with an outer contour 10, the outer contour 10 matches the ring groove 11 of the piston pin 6, and the depth of the outer contour 10 limits the lower body 2 of the assembly tool. position, to ensure that the piston circlip can enter the piston pin 6 smoothly.

Further, the mandrel 4 is composed of a first section and a second section provided with a tensioning plate 5, the diameter of the first section is larger than that of the second section, and two tensioning plates 5 and the second section are jointly formed It should be cylindrical; it should be noted that the inner diameter of the hollow inner cavity 3 corresponding to the second section is larger than the inner diameter of the cylindrical shape, so that the tensioning plate 5 can be tightly attached to the movable end of the tensioning plate 5 under the elastic force of the spring 9. The inner wall of the hollow cavity 3.

Further, in order to limit the travel distance of the mandrel 4 , the upper end of the hollow cavity 3 is provided with a limiting section 12 , and the limiting block 13 on the first section is limited in the limiting section 12 .

Further, an end cap 14 is provided on the upper end of the upper body 1 of the indenter, and the end cap 14 is detachably connected to the upper body 1 of the indenter, and the lower body 2 of the indenter is also detachably connected to the upper body 1 of the indenter. In an implementation of this embodiment, the end cap 14 is detachably connected to the upper body 1 of the indenter, the lower body 2 of the indenter and the upper body 1 of the indenter by pins.

Further, the lower end of the upper body 1 of the indenter is provided with a notch 15, and the notch 15 is arranged on the upper end of the lower body 2 of the indenter; it should be noted that the lower end of the upper body 1 of the indenter and the upper end of the upper body 1 The inner diameter is the same.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. A tool for pressing an engine piston circlip, comprising: The indenter is cylindrical, and has a hollow cavity (3) along the axial direction, including the upper body (1) and the lower body (2) of the indenter, and the lower body (2) of the indenter can be connected with the piston pin ( 6) contact; Mandrel (4), which is arranged in the hollow inner cavity (3) corresponding to the upper body (1) of the indenter, and is slidably connected with the hollow inner cavity (3), the lower end of the mandrel (4) is provided on both sides There is a tension plate (5), the first end of the tension plate (5) is rotatably connected to the mandrel (4), and the second end is connected to the spring (9) between the two tension plates (5). Under the action of elastic force, it abuts against the inner wall of the hollow inner cavity (3), and the piston circlip can be set in the hollow inner cavity (3) corresponding to the lower body (2) of the indenter, and enters under the push of the tensioning plate (5). Piston pin (6). 2 . The engine piston circlip pressing tool according to claim 1 , characterized in that, the hollow inner chamber ( 3 ) corresponding to the lower body ( 2 ) of the indenter is a reducing section ( 7 ) whose diameter gradually decreases. 3 . 3. The engine piston circlip pressing tool according to claim 2, characterized in that, the lower end of the mandrel (4) is provided with a via hole (8) along the vertical direction of the pressure head, and the spring (9) is set In the through hole (8), and its two ends are respectively connected with the tension plate (5). 4. engine piston circlip pressing tool as claimed in claim 3 is characterized in that, the lower end of described pressure head lower body (2) is provided with outer profile (10), and described outer profile (10) and piston pin ( 6) to match the snap ring groove (11). 5. The engine piston circlip pressing tool according to claim 4, characterized in that, the mandrel (4) is composed of a first section and a second section where a tensioning plate (5) is set, and the first The segment has a larger diameter than the second segment. 6. The engine piston circlip pressing tool according to claim 5, characterized in that, the two tension plates (5) and the second section form a cylindrical shape together. 7. The engine piston circlip pressing tool according to claim 6, characterized in that, the upper end of the hollow cavity (3) is provided with a limit section (12), and the limit block on the first section (13) is limited in the limiting section (12). 8. The engine piston circlip pressing tool as claimed in claim 7, characterized in that, an end cover (14) is arranged on the upper end of the upper body (1) of the pressure head, and the end cover (14) is connected to the top of the pressure head. The body (1) is detachably connected. 9. The engine piston circlip pressing tool according to any one of claims 1 to 8, characterized in that, a gap (15) is opened at the lower end of the upper body (1) of the pressing head.

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