Combined piston oil channel oil inlet hole isolation tube assembly and assembly method

Abstract

The present invention discloses a combined piston oil channel oil inlet hole isolation tube assembly and an assembly method, which solves the technical problem that the manual knocking method used in the prior art during the assembly of the elastic isolation tube for the cooling oil channel oil inlet hole in the combined piston cannot guarantee the assembly height and the knocking assembly method may cause the isolation tube to be deformed and scrapped. It includes an isolation tube and an isolation tube positioning assembly, the isolation tube positioning assembly includes a support body, a guide body connected to the support body, the lower end face of the support body is connected to the piston skirt; the guide body is connected to an isolation tube angular positioning block for setting the isolation tube, the isolation tube angular positioning block is used to arrange one end of the isolation tube to extend into the piston skirt. The combined piston oil channel oil inlet hole isolation tube and the assembly method of the present invention can be better used for the assembly of the combined piston oil channel oil inlet hole isolation tube, has a wide range of applications, and is easy to use.

Description

Technical Field

[0001] The invention relates to the technical field of manufacturing a combined piston for an internal combustion engine, and in particular to a combined piston oil passage oil inlet hole isolation tube assembly and an assembly method. Background Art

[0002] The industry currently relies on manual tapping to assemble the elastic isolation tubes for the oil inlet holes in the cooling oil passages of combined pistons. The bevel of the isolation tube must be aligned with the piston's central axis. Excessive angular misalignment can interfere with the isolation tube and the piston oil passage, preventing proper assembly. This angular misalignment cannot be controlled using the tapping assembly method. Existing tapping assembly methods for isolation tubes are prone to deformation and scrapping, and their assembly efficiency is low, making them unsuitable for high-volume production. Summary of the Invention

[0003] The purpose of the present invention is to provide a combined piston oil channel oil inlet hole isolation tube assembly and assembly method to solve the technical problems that the existing isolation tube adopts the knocking assembly method and is easily deformed and scrapped, and the assembly efficiency is low and cannot adapt to large-scale production.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] The present invention provides a combined piston oil channel oil inlet hole isolation tube assembly, including an isolation tube and an isolation tube positioning assembly. The isolation tube positioning assembly includes a support body and a guide body connected to the support body, and the lower end face of the support body is connected to the piston skirt; the guide body is connected to an isolation tube angular positioning block for setting the isolation tube, and the isolation tube angular positioning block is used to arrange one end of the isolation tube to extend into the piston skirt.

[0006] Optionally or preferably, the isolation tube is a right-angled trapezoidal structure with an inclined surface on one side.

[0007] Optionally or preferably, the isolation tube angular positioning block includes a clamping positioning shaft and an angular guide block nested with the clamping positioning shaft, the clamping positioning shaft is provided with a spring at the lower end, and a modified screw for fixing the isolation tube angular positioning block at the upper end.

[0008] Optionally or preferably, one end of the angular guide block is provided with an angular positioning bevel groove for engaging and positioning the isolation tube, and the inclined surface of the isolation tube is engaged with the inclined surface of the angular positioning bevel groove.

[0009] Optionally or preferably, the angular guide block also includes a clamping positioning shaft guide hole for guiding and limiting the clamping positioning shaft; it also includes a spring mounting hole for installing a spring; the upper end face of the angular guide block is also provided with a threaded hole for limiting the clamping positioning shaft, and the modified screw is connected with a threaded hole.

[0010] Optionally or preferably, the side wall of the angular guide block is further provided with an isolation tube observation hole for observing the positioning condition of the isolation tube end face.

[0011] Optionally or preferably, a positioning hole is provided on the piston skirt, and a positioning pin is provided on the support body, and the positioning hole and the positioning pin are used to make the support body fit with the piston skirt.

[0012] A method for assembling a combined piston oil channel oil inlet hole isolation tube assembly comprises the following steps:

[0013] S1, before assembly, the device is positioned using two pins on one side, and the support body is connected to the piston skirt through the positioning pins; the lower end surface of the support body is connected to the piston skirt;

[0014] S2, positioning the isolation tube: install the non-beveled end of the isolation tube on the isolation tube installation port of the piston skirt, install the isolation tube angular positioning pressure block as a whole into the guide groove in the middle of the guide body, and install the inclined end face of the isolation tube on the inclined surface of the angular positioning inclined groove in the angular guide block on the isolation tube angular positioning pressure block; insert the isolation tube guide cylinder on the compression positioning shaft into the inner hole of the isolation tube to guide the isolation tube to keep it vertical; check the positioning of the inclined end of the isolation tube through the isolation tube observation hole on the guide block;

[0015] S3, the isolation tube is pressed in, and a pressure rod is extended into the upper hole of the clamping positioning shaft. Under the action of the pressure rod, the clamping positioning shaft moves downward until the end face of the clamping positioning shaft contacts the top of the inclined surface of the isolation tube; continue to apply force until the isolation tube is pressed into the piston skirt mounting hole. When the upper end face of the clamping positioning shaft and the upper end face of the guide body are in the same plane, they cannot be pressed down further due to obstruction, thus completing the assembly of the isolation tube.

[0016] Based on the above technical solution, the embodiments of the present invention can produce at least the following technical effects:

[0017] The present invention provides a combined piston oil channel oil inlet hole isolation tube assembly and an assembly method. Through the isolation tube assembly assembly, accurate and damage-free assembly of the isolation tube is achieved, avoiding position deviation, instability and the like during the installation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of an embodiment of the present invention;

[0019] Figure 2 This is an exploded view of the angular positioning block structure of the isolation tube according to an embodiment of the present invention;

[0020] Figure 3 is a cross-sectional view of an angular guide block according to an embodiment of the present invention;

[0021] Figure 4 It is a schematic structural diagram of the angular guide block according to an embodiment of the present invention.

[0022] In the figure: 1. Support body; 2. Isolation tube; 3. Isolation tube angular positioning pressure block; 31. Angular guide block; 311. Isolation tube observation hole; 32. Spring; 33. Clamping and positioning shaft; 34. Modified screw; 35. Clamping and positioning shaft guide hole; 36. Spring mounting hole; 4. Piston skirt; 5. Guide body; 6. Angular positioning inclined groove. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work shall fall within the scope of protection of the present invention.

[0024] See also Figures 1 to 4 A combined piston oil channel oil inlet hole isolation tube assembly includes an isolation tube 2 and an isolation tube positioning assembly. The isolation tube positioning assembly includes a support body 1 and a guide body 3 connected to the support body 1. The lower end surface of the support body 1 is connected to a piston skirt 4; the guide body 3 is connected to an isolation tube angular positioning block 3 for setting the isolation tube 2. The isolation tube angular positioning block 3 is used to arrange one end of the isolation tube 2 to extend into the piston skirt 4.

[0025] As an optional embodiment, the isolation tube 8 is a right-angled trapezoidal structure with one side being an inclined surface.

[0026] As an optional embodiment, the isolation tube angular positioning block 3 includes a clamping positioning shaft 33 and an angular guide block 31 nested with the clamping positioning shaft 33. The clamping positioning shaft 33 is provided with a spring 32 at the lower end and a modified screw 34 at the upper end for fixing the isolation tube angular positioning block 3.

[0027] As an optional embodiment, one end of the angular guide block 31 is provided with an angular positioning inclined groove 6 for engaging and positioning the isolation tube 2 , and the inclined surface of the isolation tube 2 engages with the inclined surface of the angular positioning inclined groove 6 .

[0028] As an optional embodiment, the angular guide block 31 also includes a clamping positioning shaft guide hole 35 for guiding and limiting the clamping positioning shaft 33; it also includes a spring mounting hole 36 for installing the spring 32; the upper end surface of the angular guide block 31 is also provided with a threaded hole for limiting the clamping positioning shaft 33, and the modified screw 34 is connected with the threaded hole.

[0029] As an optional embodiment, the side wall of the angular guide block 31 is further provided with an isolation tube observation hole 22 for observing the positioning of the end face of the isolation tube 8.

[0030] As an optional embodiment, a positioning hole is provided on the piston skirt 10 and a positioning pin is provided on the support body 1 . The positioning hole and the positioning pin are used to make the support body fit with the piston skirt 10 .

[0031] The present invention provides an assembly method of a combined piston oil channel oil inlet hole isolation tube assembly, comprising the following steps:

[0032] S1, before assembly, the device adopts one-side two-pin positioning, and the support body 1 is connected to the piston skirt 10 through the positioning pins; the lower end surface of the support body 1 is connected to the piston skirt 10;

[0033] S2, positioning the isolation tube 8. Install the non-beveled end of the isolation tube 8 on the isolation tube 2 mounting opening of the piston skirt 10. Install the isolation tube angular positioning block 3 as a whole into the guide groove in the middle of the guide body 5. Install the inclined end face of the isolation tube 2 on the inclined surface of the angular positioning bevel groove 6 in the angular guide block 31 on the isolation tube angular positioning block 3. Insert the isolation tube guide cylinder 28 on the compression positioning shaft 33 into the inner hole of the isolation tube 8 to guide the isolation tube 2 to keep it vertical. Check the positioning of the inclined end of the isolation tube 2 through the isolation tube observation hole 311 on the phase guide block 31.

[0034] S3, the isolation tube 8 is pressed in, and a pressure rod is extended into the upper hole of the clamping positioning shaft 33. Under the action of the pressure rod, the clamping positioning shaft 33 moves downward until the end face of the clamping positioning shaft 33 contacts the top of the inclined surface of the isolation tube 2; continue to apply force until the isolation tube 8 is pressed into the mounting hole of the piston skirt 10. When the upper end face of the clamping positioning shaft 33 and the upper end face of the guide body 5 are in the same plane, they cannot be pressed down further due to obstruction, thereby completing the assembly of the isolation tube 2.

[0035] The present invention has the following technical advantages:

[0036] (1) The assembly process method of the present invention makes the pressing force more uniform and stable, avoiding damage to the surface of the assembly hole caused by the position deviation and instability of the isolation tube during the pressing process, thereby avoiding the risk of loosening, separation, and other failures caused by poor combination of the isolation tube, the outer circle of the positioning pin, and the mating surface of the mounting hole after assembly;

[0037] (2) The assembly device of the present invention controls the angular position of the isolation tube with high precision, with an angular error of ≤0.4°, thus avoiding the risk of the isolation tube being scrapped due to interference with the piston top due to the installation position deviation;

[0038] (3) The assembly device of the present invention controls the height position of the isolation tube with high accuracy, with a height error of ≤0.1, thus avoiding the risk of the isolation tube and the elastic positioning pin interfering with the piston top and being scrapped due to excessive height position errors;

[0039] (4) The assembly device of the present invention has simple and flexible clamping operations and a simple and rapid assembly process; therefore, the assembly time is short, the efficiency is high, and it is suitable for mass production mode;

[0040] (5) The assembly process method and device of the present invention can complete the work that originally required two steps in one step, thus saving operators.

[0041] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention in specific circumstances.

[0042] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A combined piston oil channel oil inlet hole isolation tube assembly, characterized in that: The invention comprises an isolation tube (2) and an isolation tube positioning assembly, wherein the isolation tube positioning assembly comprises a support body (1), a guide body (5) connected to the support body (1), and the lower end surface of the support body (1) is connected to a piston skirt (4); the guide body (5) is connected to an isolation tube angular positioning block (3) for setting the isolation tube (2), and the isolation tube angular positioning block (3) is used to arrange one end of the isolation tube (2) to extend into the piston skirt (4); The isolation tube (8) is a right-angled trapezoidal structure with an inclined surface on one side; the isolation tube angular positioning block (3) comprises a clamping positioning shaft (33) and an angular guide block (31) nested with the clamping positioning shaft (33); a spring (32) is provided at the lower end of the clamping positioning shaft (33), and a modified screw (34) is provided at the upper end for fixing the isolation tube angular positioning block (3); one end of the angular guide block (31) is provided with an angular positioning inclined groove (6) for engaging and positioning the isolation tube (2), and the inclined surface of the isolation tube (2) is engaged with the inclined surface of the angular positioning inclined groove (6).

2. The combined piston oil channel oil inlet hole isolation tube assembly according to claim 1, characterized in that: The angular guide block (31) further includes a pressing positioning shaft guide hole (35) for guiding and limiting the pressing positioning shaft (33); and a spring mounting hole (36) for mounting a spring (32); and the upper end surface of the angular guide block (31) is further provided with a threaded hole for limiting the pressing positioning shaft (33), and the modified screw (34) is connected with the threaded hole.

3. The combined piston oil channel oil inlet hole isolation tube assembly according to claim 1, characterized in that: The side wall of the angular guide block (31) is also provided with an isolation tube observation hole (311) for observing the positioning condition of the end face of the isolation tube (2).

4. The combined piston oil passage oil inlet hole isolation tube assembly according to claim 1, characterized in that: A positioning hole is provided on the piston skirt (4), and a positioning pin is provided on the support body (1). The positioning hole and the positioning pin are used to make the support body fit with the piston skirt (4).

5. A method for assembling a combined piston oil passage oil inlet hole isolation tube assembly, based on the combined piston oil passage oil inlet hole isolation tube assembly according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1, before assembly, the device is positioned using two pins on one side, and the support body (1) is connected to the piston skirt (4) through the positioning pins; the lower end surface of the support body (1) is connected to the piston skirt (4); S2, positioning of the isolation tube (2), installing the non-beveled end of the isolation tube (2) on the isolation tube (2) installation port of the piston skirt (4), installing the isolation tube angular positioning block (3) as a whole into the guide groove in the middle of the guide body (5), and installing the inclined end face of the isolation tube (2) on the inclined face of the angular positioning inclined groove (6) in the angular guide block (31) on the isolation tube angular positioning block (3); inserting the isolation tube guide cylinder (28) on the pressing positioning shaft (33) into the inner hole of the isolation tube (2) to guide the isolation tube (2) so that it remains vertical; checking the positioning condition of one end of the inclined face of the isolation tube (2) through the isolation tube observation hole (311) on the angular guide block (31); S3, the isolation tube (2) is pressed in, and a pressure rod is extended into the upper hole of the pressing and positioning shaft (33). Under the action of the pressure rod, the pressing and positioning shaft (33) moves downward until the end face of the pressing and positioning shaft (33) contacts the top of the inclined surface of the isolation tube (2); the force is continued to be applied until the isolation tube (2) is pressed into the mounting hole of the piston skirt (4). When the upper end face of the pressing and positioning shaft (33) and the upper end face of the guide body (5) are in the same plane, the pressure cannot be further pressed down due to the obstruction, thereby completing the assembly of the isolation tube (2).

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