Engine connecting rod assembly guide tool

Abstract

The utility model relates to the technical field of tools, in particular to an engine connecting rod assembly guide tool which comprises a nylon guide rod and a metal guide rod, and the nylon guide rod is detachably connected with the metal guide rod. An interference fit assembly is arranged on the metal guide rod, the metal guide rod can be connected with the connecting rod through the interference fit assembly, the engine rod assembly guide rod tool composed of the nylon guide rod and the metal guide rod which are detachably connected is arranged, and the interference fit assembly is used for replacing a thread screwing assembly mode. Installation can be completed only by pressing the guide rod into a threaded hole of the connecting rod during assembly, fixation is firm and reliable, operation can be completed by pulling out the guide rod during disassembly, redundant actions and extra tools are not needed, efficiency is high, meanwhile, assembly and disassembly of the engine rod assembly guide rod tool can be rapidly completed through two simple actions of pressing-in and pulling-out, and assembly and disassembly are convenient. Traditional multi-rotation motion is converted into one-time linear motion, and the efficiency is high for an engine with a limited operation space.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling, in particular to an assembly guiding tooling for engine connecting rods. Background Art

[0002] In the assembly process of engine connecting rods, when the piston connecting rod assembly enters the cylinder, in order to avoid the big end of the connecting rod from damaging the connecting rod journal of the crankshaft, it is necessary to install two guiding rods on the bolt holes of the big end of the connecting rod. After the assembly is completed, they are removed and reused in a cycle. The traditional guiding rods are installed on the bolt holes of the connecting rod by means of thread screwing. Two guiding rods need to be installed on each connecting rod, and at least 3 to 5 turns of screwing are required to fix them firmly during assembly. An eight-cylinder engine needs to install eight guiding rods, so the efficiency of assembly and disassembly is greatly reduced. On the other hand, the connecting rods of the piston connecting rod assembly at the top dead center after being installed in the cylinder block (such as the first and fourth cylinders) are located deep in the inner cavity of the engine block. When removing, the operating space for hands and tools is small, which further increases the difficulty and affects the production efficiency. Content of the Utility Model

[0003] The utility model aims at the above problems and provides an assembly guiding tooling for engine connecting rods.

[0004] The technical solution adopted is an assembly guiding tooling for engine connecting rods, including a nylon guiding rod and a metal guiding rod, wherein the nylon guiding rod is detachably connected to the metal guiding rod;

[0005] An interference fit assembly is arranged on the metal guiding rod, and the metal guiding rod can be connected to the connecting rod through the interference fit assembly.

[0006] Optionally, a slot is arranged on the surface of the nylon guiding rod facing the metal guiding rod, and a first positioning groove is arranged on the rod body of the nylon guiding rod, and the first positioning groove communicates with the slot.

[0007] Optionally, a protruding portion is arranged on the surface of the metal guiding rod facing the nylon guiding rod, and the protruding portion can be inserted into the slot.

[0008] Optionally, a second positioning groove is arranged on the protruding portion, and the second positioning groove is adapted to the position of the first positioning groove. The nylon guiding rod and the metal guiding rod are detachably connected through a positioning pin passing through the first positioning groove and the second positioning groove.

[0009] Optionally, a smooth surface is arranged on the rod body of the nylon guiding rod, and the smooth surface is close to the slot, and the first positioning groove passes through the smooth surface.

[0010] Optionally, the interference fit assembly includes a mounting hole and a spring ball plunger. The mounting hole is arranged on the rod body of the metal guiding rod, and the spring ball plunger is placed in the mounting hole, and the spring ball plunger can fix the metal guiding rod in the connecting rod.

[0011] Optionally, the spring ball plungers are symmetrically distributed.

[0012] The advantages of the present utility model are as follows:

[0013] By providing a guiding tool for assembling the engine rod composed of a detachable nylon guide rod and a metal guide rod, and using an interference fit component to replace the assembly method of screw threading, during assembly, it only needs to be pressed into the connecting rod threaded hole to complete the installation, with firm and reliable fixation. When disassembling, pulling out the guide rod can complete the operation without any extra actions and additional tools, with high efficiency. At the same time, for the guiding tool for assembling the engine rod, two simple actions of pressing in and pulling out can quickly complete the loading and unloading, converting the traditional multiple rotational motions into a single linear motion. For an engine with limited operating space, the efficiency is high, solving the problem that the existing guide rod is installed on the bolt hole of the connecting rod by screw threading, resulting in a greatly reduced efficiency of assembly and disassembly, and a relatively small operating space for the hand and tools during disassembly, further increasing the difficulty and affecting the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 FIG. is a schematic structural diagram of a guiding tool for assembling an engine connecting rod;

[0015] Figure 2 FIG. is a schematic cross-sectional structural diagram of a guiding tool for assembling an engine connecting rod;

[0016] Figure 3 FIG. is an exploded structural diagram of a guiding tool for assembling an engine connecting rod;

[0017] Figure 4 FIG. is a schematic installation structural diagram of a guiding tool for assembling an engine connecting rod.

[0018] Wherein the reference numerals: 1 is a nylon guide rod, 2 is a positioning pin, 3 is a spring ball plunger, 4 is a metal guide rod, 5 is a connecting rod, 6 is a first positioning groove, 7 is a smooth surface, 8 is a slot, 9 is a protruding portion, 10 is a second positioning groove, and 11 is a mounting hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following specific examples illustrate the embodiments of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0020] It should be noted that the illustrations provided in the following embodiments only schematically illustrate the basic concept of the present utility model. Therefore, only the components related to the present utility model are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The types, quantities, and proportions of the components in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0021] As Figures 1 to 4 shown, an engine connecting rod assembly guiding tooling includes a nylon guide rod 1 and a metal guide rod 4, wherein the nylon guide rod 1 is detachably connected to the metal guide rod 4;

[0022] An interference fit component is provided on the metal guide rod 4, and the metal guide rod 4 can be connected to the connecting rod 5 through the interference fit component.

[0023] The purpose of such a design is to form an engine rod assembly guiding rod tooling by setting a detachable connection between the nylon guide rod and the metal guide rod, and use the interference fit component to replace the assembly method of screw threading. During assembly, it only needs to be pressed into the threaded hole of the connecting rod to complete the installation, and the fixation is firm and reliable. When disassembling, pulling out the guide rod can complete the operation, without redundant actions and additional tools, with high efficiency. At the same time, for the engine rod assembly guiding rod tooling, the loading and unloading can be quickly completed by using two simple actions of pressing in and pulling out, converting the traditional multiple rotational motions into a single linear motion. For an engine with limited operating space, the efficiency is high, which solves the problem that the existing guide rod is installed on the bolt hole of the connecting rod by screw threading, resulting in a greatly reduced efficiency of assembly and disassembly, and a small operating space for hands and tools during disassembly, further increasing the difficulty and affecting the production efficiency.

[0024] Meanwhile, in this embodiment, a detachable connection between the nylon guide rod 1 and the metal guide rod 4 is provided. A slot 8 is provided on one side of the nylon guide rod 1 facing the metal guide rod 4. A first positioning groove 6 is provided on the rod body of the nylon guide rod 1, and the first positioning groove 6 communicates with the slot 8. A protruding portion 9 is provided on one side of the metal guide rod 4 facing the nylon guide rod 1. The protruding portion 9 can be inserted into the slot 8. A second positioning groove 10 is provided on the protruding portion 9, and the second positioning groove 10 is adapted to the position of the first positioning groove 6. The nylon guide rod 1 and the metal guide rod 4 are detachably connected by a positioning pin 2 passing through the first positioning groove 6 and the second positioning groove 10.

[0025] That is, when connecting the nylon guide rod and the metal guide rod, first insert the protruding portion into the slot, and then insert the positioning pin to pass through the first positioning groove and the second positioning groove to complete the connection between the nylon guide rod and the metal guide rod.

[0026] In this embodiment, a smooth surface 7 is provided on the rod body of the nylon guide rod 1, and the smooth surface 7 is close to the slot 8. The first positioning groove 6 passes through the smooth surface 7.

[0027] The purpose of such a design is to facilitate the gripping of the nylon guide rod during installation by providing a smooth surface.

[0028] In this embodiment, an interference fit assembly is provided, which includes a mounting hole 11 and a spring ball plunger 3. The mounting hole 11 is provided on the rod body of the metal guide rod 4. The spring ball plunger 3 is placed into the mounting hole 11, and the spring ball plunger 3 can fix the metal guide rod 4 in the connecting rod 5. At the same time, the spring ball plungers 3 are symmetrically distributed.

[0029] The purpose of such a design is that the elastic force generated by the symmetrically distributed spring ball plungers is evenly applied to the cylindrical surface of the connecting rod bolt hole, firmly fixing the entire guide rod on the connecting rod to ensure that it will not fall off under the action of gravity and impact during the assembly process. At the same time, the application of the spring ball plunger 3 replaces the traditional assembly method of screwing the guide rod on the connecting rod by thread. It can be quickly pressed in during assembly and quickly pulled out during disassembly, with high efficiency.

[0030] As Figure 4 shown, during specific installation, manually hold the nylon guide rod 1, align the metal guide rod 4 with the connecting rod bolt hole, and press it in along the axial direction. The ball head of the spring ball plunger 3 contacts the edge of the connecting rod bolt hole, and the ball head is squeezed and contracted. After being pressed in place, the ball head of the spring ball plunger 3 expands under the action of the spring and abuts against the cylindrical surface of the connecting rod threaded hole, completing a firm and reliable assembly with the connecting rod. During disassembly, manually hold the nylon guide rod 1 and pull it out along the axial direction to complete the separation of the tooling from the connecting rod.

[0031] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An engine connecting rod assembly guide tool, comprising a nylon guide rod (1) and a metal guide rod (4), characterized in that: The nylon guide rod (1) and the metal guide rod (4) are detachably connected; The metal guide rod (4) is provided with an interference fit component, and can be connected to the connecting rod (5) via the interference fit component.

2. The engine connecting rod assembly guide tool according to claim 1, characterized in that: A slot (8) is provided on a side of the nylon guide rod (1) facing the metal guide rod (4), a first positioning slot (6) is provided on the rod body of the nylon guide rod (1), and the first positioning slot (6) is communicated with the slot (8).

3. The engine connecting rod assembly guide tool according to claim 2, characterized in that: A protrusion (9) is provided on a side of the metal guide rod (4) facing the nylon guide rod (1), and the protrusion (9) can be inserted into the slot (8).

4. The engine connecting rod assembly guide tool according to claim 3, characterized in that: The protruding portion (9) is provided with a second positioning groove (10), and the second positioning groove (10) matches the position of the first positioning groove (6). The nylon guide rod (1) and the metal guide rod (4) are detachably connected via a positioning pin (2) passing through the first positioning groove (6) and the second positioning groove (10).

5. An engine connecting rod assembly guide tool according to any one of claims 2 to 4, characterized in that: A smooth surface (7) is provided on the rod body of the nylon guide rod (1), and the smooth surface (7) is close to the slot (8), and the first positioning groove (6) passes through the smooth surface (7).

6. The engine connecting rod assembly guide tool according to claim 1, characterized in that: The interference fit assembly comprises a mounting hole (11) and a spring ball plunger (3); the mounting hole (11) is provided on the rod body of the metal guide rod (4); the spring ball plunger (3) is placed in the mounting hole (11); and the spring ball plunger (3) can fix the metal guide rod (4) in the connecting rod (5).

7. The engine connecting rod assembly guide tool according to claim 6, characterized in that: The spring ball head plungers (3) are symmetrically distributed.

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