Engine sprocket fixing tool

Abstract

The present application provides an engine sprocket fixing tool. The tool comprises: a crossbeam; an H-shaped support frame, which is arranged in the middle of the crossbeam, and whose two vertical support rods are perpendicular to the crossbeam; two cylindrical pins, which are respectively arranged at the top ends of the two support rods of the H-shaped support frame, and the distance between them is equal to the distance between two adjacent holes on the flange of the oil pump sprocket. The engine sprocket fixing tool provided by the present application can effectively fix the oil pump sprocket in a floating rotating state when tightening the bolts, effectively avoiding the disadvantage that the oil pump sprocket rotates together with the bolts during the tightening process.

Description

Technical Field

[0001] The present application relates to the technical field of automobile engines, and in particular to an engine sprocket fixing tool. Background Art

[0002] At present, with the continuous development and improvement of automobile engine performance, environmental protection, and safety technical requirements, the requirements for the efficiency of the engine lubrication system are also increasing. As the entire power source of the entire engine lubrication system, the performance of the oil pump plays a decisive role in the operation of the lubrication system. The power of the oil pump comes from the rotation of the engine crankshaft. The crankshaft and the oil pump are connected by steel belts and gears. The oil pump gear is the power input end of the entire oil pump. Its firmness and external wear resistance play a vital role in its working state. As the oil pump is constantly upgraded with the improvement of engine performance, the material and fastening process of the oil pump sprocket are also constantly iterating and updating, and the torque of its fixing bolts is adjusted from the original torque tightening method to the angle tightening method. Since the oil pump sprocket is in a floating state, fixing and tightening it on the premise of ensuring that its exterior is not damaged has become a key research topic for completing the assembly of the engine lubrication system.

[0003] There are three existing ways to fix the engine oil pump sprocket:

[0004] (1) Use a tool to push the chain tensioning arm to lock and secure it:

[0005] By applying pressure to the tensioning arm, the chain is pressed by the friction between the tensioning arm and the chain, so that the oil pump sprocket teeth are engaged with the chain and remain stationary, thereby tightening the oil pump sprocket bolts.

[0006] Disadvantages and shortcomings:

[0007] This method can only be used for the 20N·m small torque fixed-torque bolt tightening method before the oil pump technology was upgraded. The current engine assembly technology has improved the oil pump sprocket bolt fixing process, changing from the original 20N·m fixed-torque fixing method to 30N·m+90° torque plus angle fixing. After tightening, the torque is increased to 55-60N·m. The friction force applied to the tensioning arm and the chain by the tool cannot meet the tightening of this torque, resulting in slippage between the chain and the tensioning arm, making it impossible to tighten the oil pump bolt.

[0008] (2) Insert the pin into the oil pump sprocket hole and secure it:

[0009] The oil pump sprocket has 8 evenly arranged flange holes. Before tightening the bolts, insert two high-strength pins into two adjacent flange holes. When tightening the oil pump sprocket bolts, use a crowbar to hold the two pins and then tighten the bolts.

[0010] Disadvantages and shortcomings:

[0011] This method is complex and difficult to operate, and requires two people to work together. During the process of tightening the bolts, the bolt is inserted into the flange hole of the sprocket, and the torque of nearly 60N·m will cause damage to the flange hole, and the bolt is also prone to deformation or even breakage, which poses certain safety hazards.

[0012] (3) Make a sprocket fixing tool with a handle and fix it by hand:

[0013] According to the relative position of the oil pump sprocket flange hole, two pins are welded and fixed on a handle to make a tool. When tightening the sprocket bolt, another person is required to insert the pin on the tool into the sprocket flange hole and hold it with both hands during the bolt tightening process to prevent the sprocket from rotating.

[0014] Disadvantages and shortcomings:

[0015] During the use of the hand-held tooling, although one person holds it with both hands while the other person tightens the bolts and applies the rotation angle, since the bolts and sprockets are fastened together and are in a floating and rotatable state, as the torque continues to increase and the rotation angle is added, it is difficult to ensure that the tooling remains stationary, which can easily cause the sleeve and bolt to slip during the tightening process for the person applying force to tighten the bolts, and the coordination between the two people is not very convenient. Utility Model Content

[0016] The purpose of this application is to provide an engine combustion chamber volume detection device that can solve at least one of the above-mentioned technical problems. The specific solution is as follows:

[0017] According to a specific embodiment of the present application, the present application provides an engine combustion chamber volume detection device, comprising:

[0018] beam;

[0019] The H-shaped support frame is arranged in the middle of the beam, and its two vertical support rods are perpendicular to the beam;

[0020] Two cylindrical pins are respectively arranged at the top ends of two supporting rods of the H-shaped supporting frame, and the distance between them is equal to the distance between two adjacent holes on the sprocket flange of the oil pump.

[0021] Optionally, the crossbeam is an elongated rod-shaped body.

[0022] Optionally, the length of the cross beam is greater than the distance between the two sides of the bottom end of the engine block.

[0023] Optionally, during assembly, the crossbeam is placed on both sides of the bottom end of the engine block.

[0024] Optionally, the two vertical support rods of the H-shaped support frame are parallel to each other.

[0025] Optionally, the distance between the left support rod and the left vertex of the beam is equal to the distance between the right support rod and the right vertex of the beam.

[0026] Optionally, the left support rod and the right support rod are connected by a cross bar.

[0027] Optionally, also include:

[0028] A handle is provided on one side of the beam.

[0029] Optionally, the handle is arranged on a side of the cross beam which does not need to contact the oil pump sprocket flange.

[0030] Optionally, the handle is arranged to protrude from the crossbeam.

[0031] Compared with the prior art, the above solution of the embodiment of the present application has at least the following beneficial effects:

[0032] The utility model innovates a new sprocket fixing tool and use method based on the chain system structure. In the process of tightening the oil pump sprocket, the design characteristics of the sprocket flange surface are used, combined with the spatial positions of the sprocket, oil pump and cylinder body, to design an H-frame integrated sprocket fixing tool. The present invention connects the sprocket, oil pump and cylinder body to combine the three originally separate parts into a whole. While ensuring that the oil pump sprocket is not damaged, the force of 30N·m+90° loaded on the bolt is transmitted and distributed to the sprocket, oil pump, cylinder body and engine assembly turning table, so that the above four interact with each other, so that the oil pump sprocket in a floating state can be stable and motionless, and the assembly difficulty that the sprocket will move with the rotation of the bolt when tightened is completely avoided. The entire tightening process becomes more efficient, fast, safe and labor-saving. At the same time, it also avoids the potential safety hazards of the sleeve bolt slipping and the tool falling off the sprocket during the previous tightening process when two operators cooperate with each other; it overcomes the important issue of the difficulty in tightening when assembling the oil pump sprocket in a floating state, greatly improving the work efficiency of the operators, reducing the labor load, improving the assembly accuracy, and protecting the related parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a picture of the sprocket fixing tool;

[0034] Figure 2 This is the installation diagram of the entire engine chain system;

[0035] Figure 3 It is a schematic diagram of the position when the oil pump sprocket bolt is tightened using the utility model tool;

[0036] Figure 4 yes Figure 3 A partial enlarged view of .

[0037] Description of reference numerals:

[0038] 1-1. Crossbeam, 1-2. H-type support frame, 1-3. Cylindrical pin, 1-4. Handle; 2. Engine block, 3. Chain cooling nozzle, 4-1. Oil pump sprocket, 4-2. Oil pump sprocket bolt, 4. Oil pump, 5. VCT sprocket, 5-1. VCT sprocket bolt, 6. Crankshaft sprocket, 7. Camshaft drive chain, 8. Oil pump chain, 9. Camshaft drive chain tensioner arm, 10. Camshaft drive chain guide, 11. Oil pump drive chain tensioner arm, 12. Camshaft chain tensioner, 12-1. Camshaft chain tensioner pin, 13. Camshaft drive chain upper end guide. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0040] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0041] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0042] It should be understood that although the terms first, second, third, etc. may be used to describe in the embodiments of the present application, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, without departing from the scope of the embodiments of the present application, the first may also be referred to as the second, and similarly, the second may also be referred to as the first.

[0043] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0044] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the commodity or device including the elements.

[0045] It should be particularly noted that any symbols and / or numbers in the specification that are not marked in the accompanying drawings are not drawing marks.

[0046] The optional embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0047] With the advancement of my country's automobile engine technology, the performance improvement of the machine lubrication system has become more normalized. The working stability of the lubrication system and the corresponding chain system is extremely important. The engine oil pump sprocket bolt is the key bolt on the sprocket transmission mechanism. After being fastened to the oil pump sprocket, it is in a floating and rotatable state. This design not only solves the problem of the difficulty in fixing the engine oil pump sprocket when fastening the high-strength bolts, but also has the advantages of safety, efficiency, and convenience, thereby shortening the production cycle of each engine on the mass production line and saving a lot of time costs.

[0048] The purpose of the present invention is to change the newly upgraded oil pump sprocket bolts from the original two-person cooperation to: one person quickly completes the bolt tightening process through simple working actions. The original steps are to first insert two cylindrical pins into the flange holes of the oil pump sprocket, and then one person holds the two cylindrical pins with a crowbar, and the other person performs the fixed torsion and angle rotation of the bolts. The angle rotation process requires the cooperative personnel to hold the crowbar tightly and apply a force in the opposite direction of the tightening bolts to ensure that the oil pump sprocket does not rotate during the entire tightening process of the bolts, and finally pull out the two cylindrical pins that may be deformed after being stressed. Even if the combination of cylindrical pins and crowbars is replaced with a tooling with welded cylindrical pins, two people are still required to cooperate, and another person is also required to hold the tooling and apply the same force as when the bolts are tightened. Both methods not only have the safety hazard of slipping, but also are very inconvenient to operate. The present invention mainly solves the inconvenience of operation when the oil pump bolts are tightened in a floating state, simplifies the complex operation steps and reduces the two-person operation to one-person operation, and the entire tightening process is efficient, convenient, safe and reliable.

[0049] This utility model patent innovates a new sprocket fixing tool and use method based on the chain system structure. In the process of tightening the oil pump sprocket, the design characteristics of the sprocket flange surface are used, combined with the spatial positions of the sprocket, oil pump and cylinder body, to design an H-frame integrated sprocket fixing tool. The present invention connects the sprocket, oil pump and cylinder body to combine the three originally separate parts into a whole. While ensuring that the oil pump sprocket is not damaged, the force of 30N·m+90° loaded on the bolt is transmitted and distributed to the sprocket, oil pump, cylinder body and engine assembly turning table, so that the above four interact with each other, so that the oil pump sprocket in a floating state can be stable and motionless, completely avoiding the assembly difficulty that the sprocket will move with the rotation of the bolt when tightened. The entire tightening process becomes more efficient, fast, safe and labor-saving. At the same time, it also avoids the potential safety hazards of the sleeve bolt slipping and the tool falling off the sprocket during the previous tightening process when two operators cooperate with each other; it overcomes the important issue of the difficulty in tightening when assembling the oil pump sprocket in a floating state, greatly improving the work efficiency of the operators, reducing the labor load, improving the assembly accuracy, and protecting the related parts.

[0050] The utility model device can effectively fix the oil pump sprocket in a floating rotation state when the bolts are tightened thereto, and effectively avoids the disadvantage that the oil pump sprocket rotates together with the bolts during the tightening process in the past.

[0051] The utility model device is fixed by the sprocket flange surface during use, and will not contact the outer gear ring of the oil pump sprocket, thereby avoiding deformation of the sprocket under stress and playing a good protective role.

[0052] The utility model device has innovated a brand-new sprocket fixing tool and use method. In the process of tightening the oil pump sprocket, the design characteristics of the sprocket flange surface are used, combined with the spatial positions of the sprocket, oil pump and cylinder body, so that the three originally separate parts are combined into a whole. Under the condition of completely ensuring that the oil pump sprocket is not damaged, the sprocket is completely prevented from moving with the rotation of the bolt. The process of tightening the sprocket bolt transmits and distributes the 30N·m+90° force loaded on the bolt to the sprocket, oil pump and cylinder body, so that the entire tightening process becomes more efficient, fast, safe and labor-saving. The original two-person cooperative operation is reduced to a single-person efficient operation, effectively avoiding the potential safety hazards such as tool slippage and loss of hands during the tightening process.

[0053] The utility model device can be used in mass production of current engine production lines due to its convenient, simple, fast, safe, time-saving and labor-saving operation, and can improve the production efficiency of the production line and shorten the production cycle.

[0054] The utility model discloses an engine sprocket fixing tool, such as Figure 1 The three-dimensional diagram shows that its main components are the crossbeam 1-1, the H-shaped support frame 1-2, the cylindrical pin 1-3, and the handle 1-4. This tool adopts an integral frame structure, and the H-shaped support frame 1-2 is placed in the middle of the crossbeam 1-1, which plays a role in enhancing the overall strength of the tool; the two cylindrical pins 1-3 are set according to the spatial position and hole size of the two adjacent holes of the oil pump sprocket flange, so that the two cylindrical pins 1-3 on the tool can just be inserted into the two adjacent holes of the sprocket flange. The handle 1-4 is placed on the crossbeam 1-1, and is relatively perpendicular to the spatial position of the H-shaped support frame 1-2. Firstly, it is convenient to use the tool, and secondly, it can form a frame-type spatial mechanism with the H-shaped support frame 1-2 and the crossbeam 1-1, which greatly enhances the overall strength of the tool.

[0055] like Figure 2 The figure shows the schematic diagram of the entire engine chain system. First, install the crankshaft sprocket 6 into the crankshaft front end shaft diameter, insert the oil pump sprocket 4-1 into the front end shaft sleeve of the oil pump 4, bring the oil pump bolt 4-2 close (no torque), and then hang the oil pump chain 8 on the crankshaft sprocket 6 and the oil pump sprocket 4-1; use bolts to fix and tension the oil pump drive chain tensioning arm 11.

[0056] Then install the two VCT sprockets 5 to the front end shaft diameter of the intake and exhaust camshafts, and use the two VCT sprocket bolts 5-1 to manually tighten the two VCT sprockets. Hang the camshaft drive chain 7 on the two VCT sprockets 5 and the crankshaft sprocket 6. Then assemble the camshaft drive chain tensioning arm 9, the camshaft drive chain guide 10, the camshaft drive chain upper end guide 13, the chain cooling nozzle 3, and the camshaft chain tensioner 12, and tighten them with their corresponding bolts.

[0057] Then, pull out the camshaft chain tensioner pin 12-1 on the camshaft chain tensioner 12 to tension the camshaft drive chain 7. Then, tighten the bolts 5-1 corresponding to the two VCT sprockets 5. After the two VCT sprocket bolts 5-1 are tightened, turn the engine upside down on the turning table so that the engine cylinder block 2 is turned to face the bottom upward.

[0058] Rotate the oil pump sprocket 4-1 to the position where the two adjacent holes at the bottom of the flange are symmetrical to the center line. The assembler holds the special tool handle 1-4 with one hand and places the tool crossbeam 1-1 on both sides of the bottom end of the engine cylinder block 2. Slide the tool in the direction perpendicular to the oil pump sprocket 4-1, and during the process, the other hand fine-tunes and rotates the oil pump sprocket 4-1 left and right, so that the two cylindrical pins 1-3 of the tool can just slide into the adjacent flange holes at the bottom end of the oil pump sprocket, and then release the hand holding the tool handle 1-4.

[0059] Adjust the torque wrench to 30N·m+90°, and tighten the oil pump sprocket bolt 4-2 by the angle method. After tightening, record the tightening torque of the oil pump sprocket bolt 4-2, and put the sprocket fixing special tool into the appropriate fixed position.

[0060] like Figure 3 and Figure 4 As shown, during the tightening process of the oil pump sprocket 4-1, the oil pump sprocket 4-1, the engine block 2, and the oil pump 4 form a whole under the combination of the utility model tool. While ensuring that the oil pump sprocket 4-1 is not damaged, the oil pump sprocket 4-1 is completely prevented from moving with the rotation of the oil pump sprocket bolt 4-2. During the tightening process of the oil pump sprocket bolt 4-2, the force loaded on the bolt is transmitted and distributed to the oil pump sprocket 4-1, the oil pump 4, and the engine block 2, thereby making the entire tightening process more efficient, fast, safe, and labor-saving. The original collaboration of two people is reduced to a single-person efficient operation, which effectively saves manpower and time costs, and at the same time avoids the potential safety hazards of tool slippage and loss of hands during the tightening process.

[0061] The utility model tool overcomes the difficult operation requiring cooperation of two persons and completely realizes the efficient tightening of the engine oil pump bolts.

[0062] The utility model makes full use of the relative spatial position of the oil pump sprocket and the engine cylinder body, so that the oil pump sprocket in a floating rotation state can be completely fixed, and embodies the characteristics of simple, high-strength, high-efficiency, safety and exquisiteness of the tool.

[0063] During the process of tightening the oil pump bolts of the utility model, the force point is evenly transmitted from the oil pump sprocket to the engine cylinder body through the tool, so that a single operator can easily tighten the sprocket bolts.

[0064] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the system or device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0065] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An engine sprocket fixing tool, characterized in that: include: beam; The H-shaped support frame is arranged in the middle of the beam, and its two vertical support rods are perpendicular to the beam; Two cylindrical pins are respectively arranged at the top ends of two supporting rods of the H-shaped supporting frame, and the distance between them is equal to the distance between two adjacent holes on the sprocket flange of the oil pump.

2. The tool according to claim 1, characterized in that The crossbeam is a slender rod-shaped body.

3. The tool according to claim 2, characterized in that The length of the crossbeam is greater than the distance between the two sides of the bottom end of the engine block.

4. The tool according to claim 3, characterized in that During assembly, the crossbeam is placed on both sides of the bottom end of the engine block.

5. The tool according to claim 1, characterized in that The two vertical support rods of the H-shaped support frame are parallel to each other.

6. The tool according to claim 5, characterized in that The distance between the left support rod and the left vertex of the beam is equal to the distance between the right support rod and the right vertex of the beam.

7. The tool according to claim 6, characterized in that The left supporting rod and the right supporting rod are connected by a cross bar.

8. The tool according to claim 1, characterized in that Also includes: A handle is provided on one side of the beam.

9. The tool according to claim 8, characterized in that The handle is arranged on the side of the cross beam which does not need to contact the oil pump sprocket flange.

10. The tool according to claim 9, characterized in that The handle protrudes from the crossbeam.

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