Fixing tool

Abstract

The utility model relates to a fixing tool which comprises a main body section and an extension section, the main body section is provided with a first insertion column, the first insertion column is used for being in insertion fit with a positioning hole of an engine cylinder block, the extension section is connected with the main body section, the extension section is provided with a second insertion column, and the second insertion column is used for being in insertion fit with the positioning hole of the engine cylinder block. The second inserting column is used for being matched with an installation hole of the connecting rod in an inserting mode so as to limit movement between the engine cylinder body and the connecting rod. Therefore, the connecting rod and the engine cylinder body can be relatively fixed to limit movement between the engine cylinder body and the connecting rod, so that the connecting rod is prevented from shaking when the crankshaft is installed, the crankshaft is convenient to install, the situation that the installation position has errors can be avoided, and the assembling precision and the assembling efficiency of the crankshaft are improved. Meanwhile, the original hole-shaped structures of the engine cylinder body and the connecting rod and the fixing tool are used for relative fixing, and the machining steps can be simplified.

Description

Technical Field

[0001] The present application relates to the technical field of engine assembly auxiliary equipment, and in particular to a fixing tool. Background Art

[0002] In the prior art, when assembling the engine, the crankshaft needs to be installed in the engine cylinder. However, during the assembly process of the crankshaft, the connecting rod arranged in the engine cylinder is prone to shaking, which is inconvenient for installation, and the installation position is prone to errors, which will further cause assembly errors, resulting in secondary assembly of the crankshaft, affecting assembly efficiency. Utility Model Content

[0003] The purpose of the present application is to provide a fixing tool to solve the technical problem in the prior art that during the crankshaft assembly process, the connecting rod is prone to shaking or the installation position is deviated, which affects the assembly efficiency and easily causes assembly errors.

[0004] In order to achieve the above purpose, the technical solution adopted in this application is as follows:

[0005] A fixing tool comprises a main section and an extension section, wherein the main section is provided with a first plug-in column, and the first plug-in column is used to be plugged and matched with the positioning hole of the engine cylinder body; the extension section is connected to the main section, and the extension section is provided with a second plug-in column, and the second plug-in column is used to be plugged and matched with the mounting hole of the connecting rod to limit the movement between the engine cylinder body and the connecting rod.

[0006] According to the above technical means, the fixing tool can be fixed to the engine cylinder by plugging and matching the first plug-in column with the positioning hole of the engine cylinder, and the fixing tool can be relatively fixed to the connecting rod by plugging and matching the second plug-in column with the mounting hole of the connecting rod located in the engine cylinder, so that the connecting rod can be relatively fixed to the engine cylinder. The plug-in matching can be beneficial to limit the movement between the engine cylinder and the connecting rod in multiple directions to prevent the connecting rod from moving and shaking when installing the crankshaft, so as to facilitate the installation of the crankshaft, and to prevent errors in the installation position, so as to improve the assembly accuracy of the crankshaft, improve the assembly efficiency and the first-time qualified rate of the assembly. At the same time, the original hole structure of the engine cylinder and the connecting rod and the fixing tool can be used for relative fixation, which can simplify the processing steps.

[0007] Furthermore, the extension section has a stop surface that abuts against the end of the connecting rod, and the second plug-in column is arranged on the stop surface.

[0008] According to the above technical means, the contact area between the fixing fixture and the connecting rod can be increased. At the same time, the movement of the connecting rod relative to the engine cylinder block can be restricted in multiple directions to further improve the assembly accuracy and assembly efficiency.

[0009] Furthermore, the extension section includes a first flexible portion, a first connecting portion and a second connecting portion that are bent and connected, the first connecting portion is connected to the main section; the first flexible portion is connected to a side of the second connecting portion away from the main section, and the first flexible portion has the stop surface.

[0010] According to the above technical means, the first flexible portion can ensure that the connecting rod will not be damaged when the fixing tool is connected to the connecting rod, and at the same time, it can reduce the risk of damage when installing the crankshaft.

[0011] Furthermore, the first flexible portion has an inclined surface, which is connected to a side of the stop surface away from the main body section, and the inclined surface gradually inclines toward the main body section in a direction away from the stop surface.

[0012] According to the above technical means, in order to adapt to the shape of the big end of the connecting rod, an inclined surface can be provided so that the extension section and the connecting rod have a continuous profile after installation, so as to prevent the crankshaft from being bumped when the crankshaft is installed, so as to improve the qualified rate of assembly and the service life of the crankshaft. At the same time, by providing the first flexible portion, the corners of the big end of the connecting rod can be separated from the crankshaft during assembly, so as to prevent the risk of the corners of the big end of the connecting rod bumping the connecting rod journal of the crankshaft during the crankshaft assembly process, so as to improve the service life of the crankshaft.

[0013] Furthermore, the extension section has a first step portion, and the stop surface is formed on the first step portion.

[0014] According to the above technical means, the protruding portion of the first step portion can extend into the engine cylinder body to facilitate positioning and installation.

[0015] Furthermore, there are two first plug-in posts, which are respectively arranged at two ends of the main body section.

[0016] According to the above technical means, it is easy to ensure the balance of the fixed tooling installed on the engine cylinder block, and it is more effective to prevent the connecting rod from shaking or moving, thereby improving the assembly accuracy and assembly efficiency.

[0017] Furthermore, it also includes: a guide section, which is connected to the main section and spaced apart from the extension section, and has a second step portion for abutting against the main bearing of the engine.

[0018] According to the above technical means, on the one hand, it can play a guiding role, facilitate positioning when installing the fixing tool, and improve assembly efficiency; on the other hand, by setting the second step portion, after the fixing tool is assembled, the second step portion can stop against the engine main bearing, so as to further improve the assembly stability between the fixing tool, the connecting rod and the engine cylinder block.

[0019] Furthermore, the guide section includes a second flexible portion, a third connection portion and a fourth connection portion connected in a bent manner, the third connection portion is connected to the main section; the second flexible portion is connected to the side of the fourth connection portion away from the main section, and the second flexible portion has the second step portion.

[0020] According to the above technical means, it can be ensured that the engine main bearing will not be damaged when the fixing tool is connected to the engine main bearing, and at the same time, it can reduce the risk of damage when installing the crankshaft.

[0021] Furthermore, the fixing tool also includes: a hand-held portion, and the hand-held portion is connected to the main body section.

[0022] According to the above technical means, by providing a hand-held portion, it is convenient for assemblers to hold the handle, so as to adjust the position of the fixed tooling and improve assembly efficiency.

[0023] Furthermore, the extension sections are multiple and arranged at intervals.

[0024] According to the above technical means, such a configuration can make the fixed tooling limit the relative movement of multiple connecting rods and the engine cylinder block, so as to further improve the assembly efficiency of the crankshaft. In addition, an accommodation space can be formed between two adjacent extension sections, and the accommodation space can accommodate the balance block or crank arm of the crankshaft to prevent interference and improve assembly accuracy and assembly efficiency.

[0025] Beneficial effects of this application:

[0026] (1) The present application can relatively fix the connecting rod and the engine cylinder block by setting the first plug-in column and the second plug-in column to limit the movement between the engine cylinder block and the connecting rod, so as to prevent the connecting rod from shaking when installing the crankshaft, so as to facilitate the installation of the crankshaft, and avoid the occurrence of errors in the installation position, so as to improve the assembly accuracy and assembly efficiency of the crankshaft. At the same time, the original hole structure and fixed tooling of the engine cylinder block and the connecting rod are used for relative fixation, which can simplify the processing steps.

[0027] (2) The present application can ensure that the connecting rod will not be damaged when the fixing tool is connected to the connecting rod by setting the first flexible part, and at the same time, it can reduce the risk of damage when installing the crankshaft; the second flexible part can ensure that the engine main bearing will not be damaged when the fixing tool is installed and connected to the engine main bearing, and at the same time, it can reduce the risk of damage when installing the crankshaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A three-dimensional diagram of a fixing tool according to an embodiment of the present application;

[0029] Figure 2 Another three-dimensional view of the fixing tool of the embodiment of the present application;

[0030] Figure 3 This is a schematic diagram of the cooperation between the fixing tool and the engine according to an embodiment of the present application.

[0031] Among them, 100, fixed tooling; 200, engine cylinder block; 300, connecting rod; 310, connecting rod bearing; 400, engine main bearing;

[0032] 10. Main body;

[0033] 20. extension section; 21. stop surface; 22. first connection portion; 23. second connection portion; 24. first flexible portion; 241. inclined surface; 25. first step portion;

[0034] 30. First plug-in column; 40. Second plug-in column; 50. Guide section; 51. Second step portion; 52. Third connecting portion; 53. Fourth connecting portion; 54. Second flexible portion; 60. Hand-held portion. DETAILED DESCRIPTION

[0035] The following will describe the implementation methods of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, not for limiting the scope of protection of the present application.

[0036] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application, and thus the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0037] In the description of the present application, “plurality” means two or more.

[0038] Reference below Figure 1-Figure 3 The fixing fixture 100 of the embodiment of the present application is described. The fixing fixture 100 is used to relatively fix the connecting rod 300 to the engine cylinder block 200 to assist in installing the crankshaft (not shown). The fixing fixture 100 includes a main section 10 and an extension section 20.

[0039] Specifically, the main section 10 is provided with a first plug-in column 30, which is used to be plugged into and matched with the positioning hole of the engine block 200; the extension section 20 is connected to the main section 10, and the extension section 20 is provided with a second plug-in column 40, which is used to be plugged into and matched with the mounting hole of the connecting rod 300 to limit the movement between the engine block 200 and the connecting rod 300.

[0040] like Figure 1-Figure 3 As shown, a plurality of connecting rods 300 may be provided inside the engine block 200, and the plurality of connecting rods 300 are arranged side by side at intervals. The main body section 10 may be generally configured as a long strip, and the main body section 10 extends along the direction in which the plurality of connecting rods 300 are arranged side by side and is arranged in close contact with the engine block 200 to ensure the stability of the connection with the engine block 200. The extension section 20 is connected to one side of the main body section 10 to facilitate connection with the connecting rod 300. For example, the extension section 20 is connected to the large end of the connecting rod 300.

[0041] It is understandable that the two ends of the connecting rod 300 in the length direction are respectively a large end and a small end, and the large ends of the connecting rods 300 are arranged to face upward (that is, toward the side of the engine cylinder head). When installing the crankshaft, the crankshaft is placed in the engine cylinder block 200 from above, and the large end of the connecting rod 300 corresponds to the connecting rod 300 journal of the crankshaft. However, if the connecting rod is not relatively fixed during assembly, the connecting rod will shake or have an error in relative position, which will cause the crankshaft to fail to be assembled in place, affecting assembly accuracy and assembly efficiency.

[0042] Thus, the fixing fixture 100 can be fixed to the engine block 200 by plugging and matching the first plug-in column 30 with the positioning hole of the engine block 200, and the fixing fixture 100 and the connecting rod 300 can be relatively fixed by plugging and matching the second plug-in column 40 with the mounting hole of the connecting rod 300 located in the engine block 200, so that the connecting rod 300 and the engine block 200 can be relatively fixed, and the plug-in matching can be beneficial to limit the movement between the engine block 200 and the connecting rod 300 in multiple directions, so as to prevent the connecting rod 300 from moving and shaking when installing the crankshaft, so as to facilitate the installation of the crankshaft, and to prevent errors in the installation position, so as to improve the assembly accuracy of the crankshaft, improve the assembly efficiency and the first-time qualified rate of the assembly. At the same time, the original hole structure of the engine block 200 and the connecting rod 300 and the fixing fixture 100 can be used for relative fixation, which can simplify the processing steps.

[0043] Among them, the fixing fixture 100 of the embodiment of the present application can be relatively fixed by using the original hole-shaped structure of the engine block 200 and the connecting rod 300. The positioning hole of the engine block 200 can be a positioning pin hole, which is used to position the subsequent oil pan and is located on the K surface of the engine block 200. The mounting hole of the connecting rod 300 can be a threaded hole for matching with the connecting rod cover. Such a setting can not only ensure the stability of the connection between the engine block 200 and the connecting rod 300, but also reasonably utilize the original structure without the need to set up an additional mounting structure, thereby simplifying the processing steps and improving the processing efficiency.

[0044] It should be noted that the second plug-in column 40 can be arranged in the extension section 20 in such a way that the extension section 20 has a hole-shaped structure or a groove-shaped structure, and the second plug-in column 40 is plugged into the hole-shaped structure or the groove-shaped structure, or it can be integrally formed with the extension section 20, etc., which are not limited here. The first plug-in column 30 can also be arranged in the main section 10 in the above manner, which is not repeated here. Figure 1 and Figure 2 In the example, the first plug-in column 30 can be a positioning pin, the main section 10 has a hole-shaped structure, the positioning pin is inserted into the hole-shaped structure of the main section 10 and plugged into the positioning hole of the engine cylinder block 200, for example, the outer diameter of the positioning pin is equal to the inner diameter of the positioning hole of the engine cylinder block 200 to ensure the limiting effect. The second plug-in column 40 can be a limiting pin, the extension section 20 has a groove-shaped structure, one end of the limiting pin is inserted into the groove-shaped structure of the extension section 20, and the other end is plugged into the mounting hole of the connecting rod 300. The first plug-in column 30 and the second plug-in column 40 can be steel parts, such as 45 steel, to ensure the stability of the connection.

[0045] In some embodiments, Figure 1 and Figure 2 As shown, the extension section 20 has a stop surface 21 that abuts against the end of the connecting rod 300, and the second plug-in column 40 is arranged on the stop surface 21. For example, the two ends of the connecting rod 300 in the length direction are respectively a large end and a small end, and the end of the connecting rod 300 can be the large end of the connecting rod 300. The stop surface 21 can be located above the large end of the connecting rod 300 and fit with the upper end surface of the large end of the connecting rod 300, and the upper end of the large end of the connecting rod 300 can be the bearing surface of the connecting rod bearing 310. The free end of the second plug-in column 40 is located on the side of the end of the connecting rod 300 facing the stop surface 21, so as to facilitate the plug-in cooperation with the mounting hole of the connecting rod 300. This arrangement can increase the contact area between the fixing fixture 100 and the connecting rod 300, and at the same time, can limit the movement of the connecting rod 300 relative to the engine cylinder block 200 in multiple directions, so as to further improve the assembly accuracy and assembly efficiency.

[0046] In some embodiments, Figure 1 and Figure 2As shown, the extension section 20 includes a first flexible portion 24, a first connecting portion 22 and a second connecting portion 23 that are bent and connected, the first connecting portion 22 is connected to the main section 10; the first flexible portion 24 is connected to the side of the second connecting portion 23 away from the main section 10, and the first flexible portion 24 has the above-mentioned stop surface 21. For example, the first connecting portion 22 and the second connecting portion 23 can be vertically connected and integrally formed with the main section 10, and both can be aluminum alloy parts. The first flexible portion 24 can be arranged in a fit with the second connecting portion 23, and be installed and fixed by bolts such as hexagon socket bolts. Among them, the first flexible portion 24 is made of flexible material, for example, it can be a rubber part or a polyurethane part. The first flexible portion 24 can ensure that the connecting rod 300 will not be damaged when the fixing fixture 100 is connected to the connecting rod 300, and at the same time, it can reduce the risk of damage when installing the crankshaft.

[0047] In some embodiments, reference Figure 1 The first flexible portion 24 has an inclined surface 241, which is connected to the side of the stop surface 21 away from the main section 10. Along the direction away from the stop surface 21, the inclined surface 241 gradually tilts toward the direction of the main section 10. It can be understood that the large end of the connecting rod 300 has a groove, and the connecting rod bearing 310 of the connecting rod 300 is assembled in the groove. The cross section of the connecting rod bearing 310 is semi-arc-shaped, that is, the upper surface of the connecting rod 300 is arc-shaped. Therefore, in order to adapt to the shape of the large end of the connecting rod 300, the inclined surface 241 can be provided so that the contours of the extension section 20 and the connecting rod 300 after installation are continuous surfaces, so as to prevent the crankshaft from being bumped when the crankshaft is installed, so as to improve the qualified rate of assembly and the service life of the crankshaft. At the same time, by setting the first flexible portion 24, during assembly, the corners of the large end of the connecting rod 300 can be separated from the crankshaft to prevent the risk of the corners of the large end of the connecting rod 300 hitting the connecting rod 300 journal of the crankshaft during the crankshaft assembly process, thereby increasing the service life of the crankshaft.

[0048] In some embodiments, Figure 1 As shown, the extension section 20 has a first step portion 25, and the stop surface 21 is formed on the first step portion 25. For example, the first step portion 25 can be formed by a portion of the first flexible portion 24 close to the second connecting portion 23 protruding downward, and the protruding portion of the first step portion 25 can extend into the interior of the engine cylinder block 200 for easy positioning and installation.

[0049] In some embodiments, Figure 1 and Figure 2As shown, there are two first plug-in posts 30, and the two first plug-in posts 30 are respectively arranged at the two ends of the main body section 10. That is, the two first plug-in posts 30 are respectively arranged at the edges of the two ends of the length direction of the main body section 10 and can be symmetrically arranged, so that it is convenient to ensure the balance of the fixing tool 100 installed on the engine cylinder block 200, and it can more effectively prevent the connecting rod 300 from shaking or moving, thereby improving the assembly accuracy and assembly efficiency.

[0050] In some embodiments, Figure 1 and Figure 2 As shown, the fixing fixture 100 may also include a guide section 50, which is connected to the main section 10 and spaced apart from the extension section 20, and has a second step portion 51 for abutting against the engine main bearing 400. For example, the engine main bearing 400 may be an upper main bearing of the engine. The second step portion 51 may be a step structure formed by a portion of the guide section 50 on a side away from the main section 10 that protrudes downward, the length of the guide block may be consistent with the installation depth of the main shaft cover of the engine block 200, the thickness of the lower end of the guide block is less than or equal to the distance between the bearing surface of the upper main bearing of the engine block 200 and the main shaft cover positioning sleeve, and the second step portion 51 of the guide section 50 abuts against the bearing surface of the main shaft hole of the engine block 200 after the main bearing is installed. By providing the guide section 50, on the one hand, it can play a guiding role, facilitate positioning when installing the fixing tool 100, and improve assembly efficiency; on the other hand, by providing the second step portion 51, after the fixing tool 100 is assembled, the second step portion 51 can abut against the engine main bearing 400 to further improve the assembly stability between the fixing tool 100, the connecting rod 300 and the engine cylinder block 200.

[0051] In some embodiments, Figure 1 and Figure 2 As shown, the guide section 50 includes a third connection portion 52, a fourth connection portion 53 and a second flexible portion 54 which are connected in a bent manner, the third connection portion 52 is connected to the main section 10, the second flexible portion 54 is connected to the side of the fourth connection portion 53 away from the main section 10, and the second flexible portion 54 has a second step portion 51. The second flexible portion 54 is made of a flexible material, for example, a rubber part or a polyurethane part, to ensure that the fixing fixture 100 will not damage the engine main bearing 400 when it is installed and connected with the engine main bearing 400, and at the same time, it can reduce the risk of damage when installing the crankshaft.

[0052] For example, the third connection portion 52 and the fourth connection portion 53 can be vertically connected, and the second flexible portion 54 can be arranged in close contact with the fourth connection portion 53, and can be installed and fixed by bolts such as hexagon socket bolts. There can be two guide sections 50, and the two guide sections 50 are respectively arranged adjacent to the edges of both ends of the length direction of the main section 10, so as to facilitate installation and connection with the engine main bearing 400.

[0053] In some embodiments, Figure 1-Figure 3 As shown, the fixing tool 100 may further include: a hand-held portion 60, which is connected to the main body section 10. The hand-held portion 60 may be located in the middle of the length direction of the main body section 10, and is connected to the main body section 10 by a polygonal bolt. The hand-held portion 60 may be made of aluminum alloy. By providing the hand-held portion 60, it is convenient for the assembler to hold it, so as to adjust the position of the fixing tool 100 and improve the assembly efficiency.

[0054] In some embodiments, Figure 1 and Figure 2 As shown, the extension sections 20 are arranged in multiple intervals. The connecting rods 300 inside the engine block 200 are arranged in multiple intervals, so the number of the extension sections 20 can be multiple corresponding to the connecting rods 300, that is, the extension sections 20 are arranged one by one with the connecting rods 300, and the structure of each extension section 20 is the same, and the side of each extension section 20 facing the connecting rod 300 is provided with a second plug-in column 40. Such an arrangement can make the fixed fixture 100 limit the relative movement of the multiple connecting rods 300 and the engine block 200 to prevent the occurrence of movement or installation deviation, so as to further improve the assembly efficiency of the crankshaft. In addition, an accommodation space can be formed between two adjacent extension sections 20, and the accommodation space can accommodate the balance block or crank arm of the crankshaft to prevent interference and improve assembly accuracy and assembly efficiency.

[0055] Other structures and operations of the engine according to the embodiment of the present application, such as bearings, cylinder heads, etc., are well known to those of ordinary skill in the art and will not be described in detail here.

[0056] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "center", "inside", "outside", "up", "down", "left", "right", "front", "back", "length", "width", "thickness", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a change in posture or a change in motion state, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both the above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0057] The above embodiments are only preferred embodiments for fully illustrating the present application, and the protection scope of the present application is not limited thereto. Any equivalent substitution or change made by a person skilled in the art based on the present application is within the protection scope of the present application.

Claims

1. A fixed tool, characterized in that: include: A main body section, wherein the main body section is provided with a first plug-in column, and the first plug-in column is used to be plugged and matched with the positioning hole of the engine cylinder body; an extension section, wherein the extension section is connected to the main body section, and the extension section is provided with a second plug-in column, and the second plug-in column is used to be plugged and matched with the mounting hole of the connecting rod to limit the movement between the engine cylinder body and the connecting rod.

2. The fixing tool according to claim 1, characterized in that: The extension section has a stop surface that abuts against the end of the connecting rod, and the second plug-in column is arranged on the stop surface.

3. The fixing tool according to claim 2, characterized in that: The extension section comprises: A first connecting portion and a second connecting portion connected by bending, wherein the first connecting portion is connected to the main body section; A first flexible portion, wherein the first flexible portion is connected to a side of the second connecting portion away from the main body section, and the first flexible portion has the stop surface.

4. The fixing tool according to claim 3, characterized in that: The first flexible portion has an inclined surface, which is connected to a side of the stop surface away from the main body section, and the inclined surface gradually inclines toward the main body section in a direction away from the stop surface.

5. The fixing tool according to claim 2, characterized in that: The extension section has a first step portion, and the abutment surface is formed on the first step portion.

6. The fixing tool according to claim 1, characterized in that: There are two first plug-in posts, which are respectively arranged at two ends of the main body section.

7. The fixing tool according to claim 1, characterized in that: Also includes: A guide section is connected to the main section and spaced apart from the extension section, and has a second step portion for abutting against a main bearing of an engine.

8. The fixing tool according to claim 7, characterized in that: The guide section comprises: A third connecting portion and a fourth connecting portion connected by bending, wherein the third connecting portion is connected to the main body section; A second flexible portion, wherein the second flexible portion is connected to a side of the fourth connecting portion away from the main body section, and the second flexible portion has the second step portion.

9. The fixing tool according to claim 1, characterized in that: Also includes: A hand-held portion is connected to the main body section.

10. The fixing tool according to any one of claims 1 to 9, characterized in that: The extension sections are multiple and arranged at intervals.

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