Pin bush batch press fitting tool for engine cylinder block machining

Abstract

The utility model discloses a pin bush batch press fitting tool for engine cylinder block machining, which comprises a bottom plate and a mandrel arranged on the bottom plate. A plurality of pin sleeve fixing holes are formed in the bottom plate, mandrel limiting holes are formed below the pin sleeve fixing holes, and screw mounting holes are formed below the mandrel limiting holes; one side of the pin sleeve is arranged in the pin sleeve fixing hole, the bottom of the mandrel is connected in the mandrel limiting hole, and the screw is arranged in the screw mounting hole and connected with the mandrel. During use, the mandrel is connected to the bottom plate, the mandrel is limited through the screw, then the pin bush is inserted into the fixing hole, and press fitting of the pin bush is completed in a knocking mode. By means of the design, batch production and machining are facilitated, the stability and the press-fitting efficiency of the pin bush can be improved, and the labor intensity of workers is reduced. Through the design of the tool, rapid and stable press fitting of the pin bush can be achieved, and improvement of production efficiency is promoted.

Description

Technical Field

[0001] The utility model belongs to the technical field of engine processing, in particular to a batch press-fitting tool for pin sleeves used for processing engine cylinder bodies. Background Art

[0002] The engine block is an important component of an internal combustion engine. It is usually made of materials such as aluminum alloy or cast iron. The engine block contains cylinders to accommodate the movement of the pistons, and usually also contains valves, spark plugs and other components. During the operation of the engine, fuel is burned in the cylinders to generate energy, drive the pistons to move, and thus drive the vehicle. Therefore, the engine block plays a very important role in engine performance and working efficiency.

[0003] During the processing of the engine cylinder block, the main bearing cap will be assembled. The main bearing cap usually has two limiting methods: the main bearing cap end face stop limit and the pin sleeve limit. When the engine cylinder main bearing cap adopts the pin sleeve limit: the pin sleeve needs to be installed on the pin hole of the engine cylinder bearing seat or installed on the main bearing cap and then the main bearing cap is assembled. The traditional pin sleeve press-fitting method is to make a press-fitting tool to press the pin sleeve on the cylinder block or the main bearing cap. However, the press-fitting tool in the prior art can only press-fit a single one, and cannot realize batch press-fitting of pin sleeves.

[0004] The patent with publication number CN220348307U discloses a center pin sleeve press-fitting equipment, which uses a lifting shaft as a guide, uses a positioning seat for positioning, and cooperates with a locking device and an elastic driving device; during the press-fitting process, no marking of the interface is required to ensure that the press-fitting is qualified, thereby improving the press-fitting efficiency. However, this press-fitting equipment can only press-fit one pin sleeve at a time, and cannot achieve batch press-fitting. Utility Model Content

[0005] The purpose of the utility model is to provide a batch press-fitting tool for pin sleeves used in engine cylinder block processing to solve the following technical problems raised in the background technology:

[0006] The press-fitting tools in the prior art can only press-fit a single piece, and cannot press-fit the pin sleeves in batches.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A batch press-fitting tool for pin sleeves used in engine cylinder block processing comprises a base plate and a mandrel, wherein the mandrel is arranged on the base plate;

[0009] The bottom plate is provided with a plurality of pin sleeve fixing holes, a core shaft limiting hole is provided below the pin sleeve fixing hole, and a screw mounting hole is provided below the core shaft limiting hole;

[0010] One side of the pin sleeve is arranged in the pin sleeve fixing hole, the bottom of the mandrel is connected in the mandrel limiting hole, and the screw is arranged in the screw mounting hole and connected with the mandrel.

[0011] Further, the pin sleeve fixing hole is in clearance fit with the pin sleeve, and the diameter of the pin sleeve fixing hole is 0.05 - 0.1 mm larger than the outer diameter of the pin sleeve.

[0012] Further, the depths of all the pin sleeve fixing holes on the bottom plate are the same, and the depth of the pin sleeve fixing hole is equal to the exposed height after the pin sleeve is assembled.

[0013] Further, the mandrel limiting hole is in clearance fit with the mandrel, and the diameter of the mandrel limiting hole is 0.1 - 0.2 mm larger than the outer diameter of the mandrel. The mandrel limiting hole can allow the mandrel to swing.

[0014] Further, the screw is fitted and installed in the screw mounting hole and connected with the mandrel, and the screw is not completely fastened in the screw mounting hole.

[0015] Further, the surface of the bottom plate is quenched.

[0016] Further, the number of pin sleeve fixing holes on the bottom plate matches the number of pin holes on the main bearing cover; the number of mandrel limiting holes matches the number of pin sleeve fixing holes, and the number of screw mounting holes matches the number of mandrel limiting holes.

[0017] Further, a fillet is provided at the top edge of the mandrel.

[0018] Further, the bottom plate is of a rectangular plate - like structure.

[0019] Further, a bolt hole is provided at the bottom of the mandrel, and one side of the screw is thread - connected in the bolt hole of the mandrel.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] The design of the pin sleeve batch press - fitting tooling for engine cylinder block processing of the utility model includes components such as a bottom plate, a mandrel, and a pin sleeve. The bottom plate is provided with pin sleeve fixing holes, mandrel limiting holes, and screw mounting holes for installing and fixing corresponding parts. In actual use, the mandrel is connected to the bottom plate, and the mandrel is limited by screws. Then the pin sleeve is inserted into the fixing hole, and the press - fitting of the pin sleeve is completed by knocking. In addition, the position of the mandrel on the bottom plate corresponds to the valve cover bolt holes on the bearing cover, ensuring that when the bearing cover is placed on the bottom plate, the mandrel can pass through the bolt holes. This design not only facilitates batch production and processing, but also improves the stability and press - fitting efficiency of the pin sleeve, reducing the labor intensity of employees. Through this tooling design, the rapid and stable press - fitting of the pin sleeve can be realized, promoting the improvement of production efficiency. Description of the Drawings

[0022] Figure 1 One of the schematic diagrams of the bottom plate structure of the present utility model;

[0023] Figure 2 Another schematic diagram of the bottom plate structure of the present utility model;

[0024] Figure 3 Partial sectional view schematic diagram of the bottom plate of the present utility model;

[0025] Figure 4 Overall structure schematic diagram of the tooling of the present utility model;

[0026] Figure 5 Cooperating schematic diagram of the mandrel and the bottom plate of the present utility model;

[0027] Figure 6 Cooperating schematic diagram of the bearing cover and the tooling of the present utility model.

[0028] Markings in the figure: 101 - bottom plate, 102 - pin sleeve fixing hole, 103 - screw mounting hole, 104 - mandrel limiting hole, 105 - mandrel, 106 - pin sleeve, 107 - screw, 108 - bearing cover. Specific implementation manners

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0030] Embodiment

[0031] A batch press-fitting tooling for pin sleeves used in engine cylinder block machining, including a bottom plate 101 and a mandrel 105, and the mandrel 105 is arranged on the bottom plate 101;

[0032] A number of pin sleeve fixing holes 102 are arranged on the bottom plate 101. A mandrel limiting hole 104 is arranged below the pin sleeve fixing hole 102, and a screw mounting hole 103 is arranged below the mandrel limiting hole 104; wherein, the pin sleeve fixing hole 102 is used for installing the pin sleeve 106, the mandrel limiting hole 104 is used for installing the mandrel 105, the screw mounting hole 103 is used for installing the screw 107, and the mandrel 105 is used for guiding the pin sleeve 106.

[0033] One side of the pin sleeve 106 is arranged in the pin sleeve fixing hole 102, the bottom of the mandrel 105 is connected in the mandrel limiting hole 104, and the screw 107 is arranged in the screw mounting hole 103 and connected to the mandrel 105. The screw 107 is used for limiting the mandrel 105.

[0034] In actual use, first connect the mandrel 105 to the bottom plate 101 and limit the mandrel 105 with the screw 107. Insert the bottom of the pin sleeve 106 into the pin sleeve fixing hole 102. Pass the tile cover bolt hole on the bearing cover 108 through the mandrel 105 and place it on the bottom plate 101, and then tap it with a rubber hammer to complete the press-fitting of the pin sleeve 106. It should also be noted that the position of the mandrel 105 on the bottom plate 101 corresponds to the position of the tile cover bolt hole on the bearing cover 108. That is to say, when the bearing cover 108 is placed on the bottom plate 101, the mandrel 105 on the bottom plate 101 can all pass through the tile cover bolt hole on the bearing cover 108. In addition to facilitating batch processing, this method can also facilitate the fixation of the position of the bearing cover 108, thereby ensuring the stability of the press-fitting of the pin sleeve 106 and enabling the pin sleeve 106 to be stably pressed into the tile cover bolt hole of the bearing cover 108. By this method, multiple pin sleeves 106 can be press-fitted at one time, thereby reducing the labor intensity of employees and effectively improving the press-fitting efficiency of the pin sleeve 106.

[0035] In a preferred embodiment, the pin sleeve fixing hole 102 and the pin sleeve 106 are in clearance fit, and the diameter of the pin sleeve fixing hole 102 is 0.05 - 0.1 mm larger than the outer diameter of the pin sleeve 106. In this embodiment, the diameter of the pin sleeve fixing hole 102 is 0.1 mm larger than the outer diameter of the pin sleeve 106. By designing the diameter of the pin sleeve fixing hole 102 to be slightly larger than that of the pin sleeve 106, it is convenient to install the pin sleeve 106. At the same time, since the diameter of the pin sleeve fixing hole 102 is only 0.1 mm larger than that of the pin sleeve 106, the pin sleeve fixing hole 102 can effectively limit the pin sleeve 106. Through this design, it is convenient and fast to install the pin sleeve 106, which is convenient for the subsequent press-fitting of the pin sleeve 106.

[0036] In a preferred embodiment, the depths of all the pin sleeve fixing holes 102 on the bottom plate 101 are the same, and the depth of the pin sleeve fixing hole 102 is equal to the height of the pin sleeve 106 exposed after assembly. This design can make the tops of the installed pin sleeves 106 flush, thereby improving the assembly accuracy and stability of batch press-fitting. The depth of the pin sleeve fixing hole 102 is equal to the height of the pin sleeve 106 exposed after assembly, that is, the length of the pin sleeve 106 exposed after assembly is determined by the depth of the pin sleeve fixing hole 102. This design can reduce the problems caused by errors during the assembly process and improve the reliability of the tooling.

[0037] In a preferred embodiment, the core shaft limiting hole 104 is in clearance fit with the core shaft 105, and the diameter of the core shaft limiting hole 104 is 0.1 - 0.2 mm larger than the outer diameter of the core shaft 105. The core shaft limiting hole 104 can allow the core shaft 105 to swing. This design facilitates the installation of the core shaft 105. In this embodiment, the diameter of the core shaft limiting hole 104 is 0.2 mm larger than that of the core shaft 105. The core shaft limiting hole 104 allows the core shaft 105 to swing slightly to enable the core shaft 105 to cope with a certain degree of assembly error and process fluctuation, thereby improving the assembly flexibility and practicability of the tooling. This design can also reduce assembly problems caused by inaccurate dimensions and ensure the reliability and stability of the tooling.

[0038] In a preferred embodiment, the screw 107 is fitted and installed in the screw mounting hole 103 and connected to the core shaft 105, and the screw 107 is not fully fastened in the screw mounting hole 103. The screw 107 is used to limit the core shaft 105. At the same time, the design of the screw 107 hole and the screw 107 enables the core shaft 105 to be detachably connected to the bottom plate 101, facilitating the replacement of the core shaft 105. The reason for designing the screw 107 not to be fully fastened in the screw mounting hole 103 is to allow the core shaft 105 to swing slightly, so that the core shaft 105 can cope with a certain degree of assembly error and process fluctuation.

[0039] In a preferred embodiment, the surface of the bottom plate 101 is quenched. That is, through the process of rapid cooling after high-temperature heating, a hard quenched layer is formed on the surface of the bottom plate 101. This treatment can greatly improve the hardness of the bottom plate 101, enabling it to withstand higher loads and usage intensities and extending its service life. The quenching treatment can also enhance the anti-deformation ability of the bottom plate 101, improve its stability and reliability, and ensure that it is not easily deformed or fails during use. Through the quenching treatment, the hardness and wear resistance of the surface of the bottom plate 101 are improved, thereby enhancing the overall performance and service life of the tooling. Because during use, the bottom plate 101 and the bearing cover 108 are subjected to knocking for a long time, in order to prevent the bottom plate 101 from being worn due to knocking, it is necessary to quench the bottom plate 101 to increase the overall strength of the bottom plate 101.

[0040] In a preferred embodiment, the number of pin sleeve fixing holes 102 on the bottom plate 101 matches the number of pin holes on the main bearing cap 108; to ensure that the pin sleeve 106 can be correctly fixed on the bearing cap 108 and provides an appropriate number of connection points to enhance the overall stability. The number of mandrel limiting holes 104 matches the number of pin sleeve fixing holes 102, ensuring that the mandrel 105 can be correctly assembled on the bottom plate 101 and has an appropriate positioning function. The number of screw mounting holes 103 matches the number of mandrel limiting holes 104, ensuring that the screws 107 can be correctly installed on the bottom plate 101, further enhancing the reliability and stability of the structure. This design of the matching numbers plays a key role in the assembly and performance of the entire tooling, ensuring that the position and connection of each component can be accurately corresponding, making the tooling structure more stable and reliable.

[0041] In a preferred embodiment, a fillet is provided at the top edge of the mandrel 105. By providing the fillet, the wear generated during the press-fitting assembly process can be reduced. In addition, the fillet edge can also enhance the safety during assembly and avoid accidental injuries caused by sharp edges. By providing the fillet, not only can the overall performance and stability of the tooling be improved, but also the usage experience and safety can be optimized, ensuring that the tooling can be used stably and reliably for a long time.

[0042] In a preferred embodiment, the bottom plate 101 is a rectangular plate-like structure. The rectangular plate-like structure has a large contact area, which can provide a more uniform distribution of supporting force and helps to ensure the stability and balance of the tooling. In addition, the rectangular plate-like structure is easier to achieve precise dimensional matching during assembly and docking, improving the assembly efficiency and accuracy of the tooling. By adopting the rectangular plate-like structure of the bottom plate 101, a solid and reliable foundation can be provided for the tooling, meeting the requirements for stability and accuracy during the process of press-fitting the pin sleeve 106, thereby improving the processing efficiency.

[0043] In a preferred embodiment, a bolt hole is provided at the bottom of the mandrel 105, and one side of the screw 107 is threadedly connected to the bolt hole of the mandrel 105. By providing the bolt hole at the bottom of the mandrel 105, the assembly process can be simplified and the assembly efficiency can be improved, while ensuring sufficient firmness and stability at the connection. The setting of the bolt hole can also achieve the convenience of quickly disassembling and replacing the mandrel 105, improving the flexibility and maintainability of the tooling. This design not only ensures the reliable connection between the tooling components, but also enhances the stability and reliability of the overall structure.

[0044] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0045] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "setting", "connection", "fixation", "swivel connection", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0046] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A batch press-fitting tooling for pin bushings used in engine block machining, characterized in that: It includes a bottom plate (101) and a mandrel (105), and the mandrel (105) is arranged on the bottom plate (101); A number of bushing fixing holes (102) are arranged on the bottom plate (101). A mandrel limiting hole (104) is arranged below the bushing fixing hole (102), and a screw mounting hole (103) is arranged below the mandrel limiting hole (104); One side of the bushing (106) is arranged in the bushing fixing hole (102), the bottom of the mandrel (105) is connected in the mandrel limiting hole (104), and the screw (107) is arranged in the screw mounting hole (103) and connected to the mandrel (105).

2. The batch press-fitting tooling for pin sleeves used in the machining of engine cylinder blocks according to claim 1, characterized in that: The bushing fixing hole (102) and the bushing (106) are in clearance fit, and the diameter of the bushing fixing hole (102) is 0.05 - 0.1 mm larger than the outer diameter of the bushing (106).

3. A batch press-fitting tooling for pin bushings used in engine block machining according to claim 1, characterized in that: The depths of all the bushing fixing holes (102) on the bottom plate (101) are the same, and the depth of the bushing fixing hole (102) is equal to the exposed height of the bushing (106) after assembly.

4. A batch press-fitting tooling for pin bushings used in engine block machining according to claim 1, characterized in that: The mandrel limiting hole (104) and the mandrel (105) are in clearance fit, and the diameter of the mandrel limiting hole (104) is 0.1 - 0.2 mm larger than the outer diameter of the mandrel (105). The mandrel limiting hole (104) can allow the mandrel (105) to swing.

5. A batch press-fitting tooling for pin sleeves used in engine block machining according to claim 1, characterized in that: The screw (107) is fitted and installed in the screw mounting hole (103) and connected to the mandrel (105), and the screw (107) is not fully fastened in the screw mounting hole (103).

6. A batch press-fitting tooling for a pin bushing in the machining of an engine cylinder block according to claim 1, characterized in that: The surface of the bottom plate (101) is quenched.

7. A batch press-fitting tooling for pin sleeves used in the machining of engine cylinder blocks according to claim 1, characterized in that: The number of the bushing fixing holes (102) on the bottom plate (101) matches the number of the pin holes on the main bearing cover (108); the number of the mandrel limiting holes (104) matches the number of the bushing fixing holes (102), and the number of the screw mounting holes (103) matches the number of the mandrel limiting holes (104).

8. A batch press-fitting tooling for pin sleeves used in the machining of engine cylinder blocks according to claim 1, characterized in that: The top edge of the mandrel (105) is provided with a fillet.

9. A batch press-fitting tooling for pin bushings used in the machining of engine cylinder blocks according to claim 1, characterized in that: The bottom plate (101) is a rectangular plate - shaped structure.

10. A batch press-fitting tooling for pin bushings used in engine block machining according to claim 1, characterized in that: The bottom of the mandrel (105) is provided with a bolt hole, and one side of the screw (107) is thread - connected in the bolt hole of the mandrel (105).

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