A diesel engine connecting rod big end bearing cap assembly tool

Abstract

The present invention relates to the technical field of diesel engine connecting rod big end bearing cap assembly, and provides a diesel engine connecting rod big end bearing cap assembly tool, including a first bracket, a balancing screw, a second bracket, a first pulley, an operating handle, an adjusting rod, a fixing groove, and a baffle; the first bracket is provided with a U-shaped groove at the lower end, and two balancing screws are respectively arranged in corresponding threaded holes provided at the upper end of the first bracket; two second brackets are arranged in parallel at the upper end of the first bracket; the central axis of the first pulley is respectively fixed on the two second brackets at both ends; one end of the adjusting rod is fixed in the middle of the operating handle, and the other end of the adjusting rod is arranged as an inclined surface; one side of the fixing groove is open, and the bottom surface of the fixing groove on one side of the opening is fixed on the inclined surface, and the baffle is arranged at the top of the side wall of the fixing groove opposite to the opening. The present invention can realize the rapid and accurate assembly of the connecting rod big end bearing cap, reduce the physical exertion and safety risks caused by manually lifting the bearing cap upward, reduce the assembly cost, and has a simple structure, lightness and flexibility.

Description

Technical Field

[0001] The invention relates to the technical field of diesel engine connecting rod big end bearing cap assembly, in particular to a diesel engine connecting rod big end bearing cap assembly tool. Background Art

[0002] The traditional technology for installing the connecting rod big end bearing cap is: in a limited space, people cannot stand, squat or kneel during the operation, but half squat and lie sideways. Each installation process requires the cooperation of several people. One person uses a small shovel to lift the big end cap upward in the most clumsy way, and the other person can only use one hand to hold up the bearing cap, exerting the greatest strength, and it takes about half an hour to install a connecting rod bearing cap. The above technology has the following shortcomings: (1) Due to the great physical exertion, it is difficult to align the upper and lower bearings with one hand. The bearing cap is easy to slip during installation. Sometimes the bearing cap cannot be held up, resulting in the bearing cap falling, which is very likely to injure fingers and wrists or hit the oil pan oil filter, causing personal or equipment safety accidents; (2) Because the installation operation is extremely inconvenient and takes a lot of working hours, it takes about an hour for three people to install a connecting rod cap, which increases the maintenance labor cost; (3) Because the crankcase cover at the other end needs to be opened during installation, dirt is easy to enter the crankcase during the operation on both sides, affecting the quality of the locomotive after maintenance. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides a diesel engine connecting rod big end bearing cover assembly tool, which can realize the rapid and accurate assembly of the connecting rod big end bearing cover, reduce the physical exertion and safety risks caused by manually lifting the bearing upwards when assembling the connecting rod big end bearing cover, reduce the manual assembly cost, and has a simple structure, lightness and flexibility.

[0004] The technical solution of the present invention is:

[0005] A diesel engine connecting rod big end bearing cap assembly tool, characterized in that it comprises a first bracket (4), a balancing screw (3), a second bracket (5), a first pulley (6), an operating handle (1), an adjusting rod (2), a fixing groove (7), and a baffle (8);

[0006] The first bracket (4) has a U-shaped groove at the lower end, and two threaded holes at the upper end; there are two balancing screws (3), and the two balancing screws (3) are respectively arranged in corresponding threaded holes;

[0007] There are two second brackets (5), and the two second brackets (5) are arranged in parallel at the upper end of the first bracket (4); the first pulley (6) is arranged between the two second brackets (5), and the central axis of the first pulley (6) is fixed to the two second brackets (5) at both ends respectively;

[0008] One end of the adjusting rod (2) is fixed in the middle of the operating handle (1), and the other end of the adjusting rod (2) is arranged to be an inclined surface; one side of the fixing groove (7) is open, and the bottom surface of the fixing groove (7) on the side of the opening is fixed to the inclined surface, and the baffle (8) is arranged on the top of the side wall of the fixing groove (7) opposite to the opening.

[0009] Furthermore, the longitudinal section of the adjusting rod (2) except the bevel end is rectangular.

[0010] Furthermore, the angle between the inclined surface and the center line of the adjusting rod (2) is 45 degrees.

[0011] Furthermore, the adjusting rod (2) is arranged above the first pulley (6).

[0012] Furthermore, the inclined surface is located between the center line of the bottom surface of the fixing groove (7) and one end of the bottom surface.

[0013] Furthermore, it also includes a second pulley, which is arranged above the first pulley (6), and the central axis of the second pulley is fixed on two second brackets (5) at both ends respectively, the central axis of the second pulley is parallel to the central axis of the first pulley (6), and the adjustment rod (2) is arranged between the first pulley (6) and the second pulley.

[0014] Furthermore, the angle between the line between the center point of the first pulley (6) and the center point of the second pulley and the horizontal plane is 75 degrees.

[0015] Furthermore, the first bracket (4) comprises a top plate (4-1), a first side wall plate (4-2), and a second side wall plate (4-3); the first side wall plate (4-2) and the second side wall plate (4-3) are respectively arranged on two opposite sides of the top plate (4-1) to form the U-shaped groove.

[0016] Furthermore, the first side wall plate (4-2) and the second side wall plate (4-3) are parallel to each other, the distance between the first side wall plate (4-2) and the second side wall plate (4-3) is greater than the wall thickness of the crankcase inspection hole of the diesel engine, and the second bracket (5) is perpendicular to the first side wall plate (4-2).

[0017] Furthermore, the second bracket (5) and the first bracket (4), the central axis of the first pulley (6) and the two second brackets (5), the adjusting rod (2) and the operating handle (1), and the fixing groove (7) and the inclined surface are all welded together, and the baffle (8) and the side wall of the fixing groove (7) opposite to the opening are integrally formed.

[0018] The beneficial effects of the present invention are:

[0019] (1) The present invention arranges a U-shaped groove on the first bracket, a pulley on the second bracket, and a fixing groove on the inclined surface of one end of the adjusting rod, so that the first bracket can be fixed on the wall of the crankcase inspection hole. The adjusting rod is manipulated by an operating handle and cooperates with the pulley to adjust the fixing groove to hold the connecting rod big end bearing cap and move it forward and backward and up and down to align the upper and lower bearing mouth mating surfaces, which is conducive to inserting the connecting rod screws for fixing, and can realize the fast and accurate assembly of the connecting rod big end bearing cap, reduce the physical consumption and safety risks caused by manually lifting the bearing upward when assembling the connecting rod big end bearing cap, improve the maintenance quality, reduce the manual assembly cost, and has a simple structure, lightness and flexibility.

[0020] (2) By arranging a balancing screw on the first bracket, the present invention can adjust the balance of the first bracket when the U-shaped groove of the first bracket is stuck on the wall of the crankcase inspection hole, which is beneficial to the left-right alignment of the upper and lower shoe joint surfaces and ensures the smooth progress of the assembly work.

[0021] (3) By providing a baffle at one end of the fixing groove, the present invention can prevent the connecting rod big end bearing cover from tilting downward by 45 degrees during installation and having a height greater than the height of the fixing groove, causing the bearing cover to fall from the front of the fixing groove into the oil pan and even damage the filter screen during installation, which is conducive to the smooth progress of the assembly work.

[0022] (4) The present invention sets the longitudinal section of the adjusting rod to be rectangular so that the contact surface between the adjusting rod and the pulley is a plane, thereby preventing the adjusting rod from rotating left and right on the pulley and improving the accuracy of adjusting rod manipulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a front view of a diesel engine connecting rod big end bearing cap assembly tool of the present invention in Example 1.

[0024] Figure 2 It is a top view of the diesel engine connecting rod big end bearing cap assembly tool of the present invention in embodiment 1.

[0025] Figure 3 This is a schematic structural diagram of the first bracket in the diesel engine connecting rod big end bearing cap assembly tool of the present invention in Example 1.

[0026] In the figure, 1 is an operating handle, 2 is an adjusting rod, 3 is a balancing screw, 4 is a first bracket, 4-1 is a top plate, 4-2 is a first side wall plate, 4-3 is a second side wall plate, 5 is a second bracket, 6 is a first pulley, 7 is a fixing groove, and 8 is a baffle. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0028] It should be noted that the “front, back, left, right, up, down” mentioned in the present invention refers to the “front, back, right, left, right, up, down” when assembling the connecting rod big end cap facing the crankcase inspection hole wall.

[0029] Embodiment 1

[0030] In the first embodiment, the diesel engine connecting rod big end bearing cap assembly tool of the present invention is used to assemble the diesel engine connecting rod big end bearing cap of the Dongfeng 7C diesel locomotive.

[0031] like Figure 1 , Figure 2 As shown, the diesel engine connecting rod big end bearing cap assembly tool of the present invention comprises a first bracket 4, a balancing screw 3, a second bracket 5, a first pulley 6, an operating handle 1, an adjusting rod 2, a fixing groove 7, and a baffle 8.

[0032] The first bracket 4 is provided with a U-shaped groove at the lower end, and the first bracket 4 is provided with two threaded holes at the upper end; there are two balancing screws 3, and the two balancing screws 3 are respectively arranged in the corresponding threaded holes.

[0033] like Figure 3 As shown, in the first embodiment, the first bracket 4 includes a top plate 4-1, a first side wall plate 4-2, and a second side wall plate 4-3, and the first side wall plate 4-2 and the second side wall plate 4-3 are respectively arranged on opposite sides of the top plate 4-1 to form a U-shaped groove. The first side wall plate 4-2 and the second side wall plate 4-3 are parallel to each other, and the distance between the first side wall plate 4-2 and the second side wall plate 4-3 is greater than the wall thickness of the crankcase inspection hole of the diesel engine.

[0034] The present invention arranges the balancing screw 3 on the first bracket 4, so that the first bracket 4 can be balanced and adjusted when the U-shaped groove of the first bracket 4 is stuck on the wall of the crankcase inspection hole, which is beneficial to the left-right alignment of the upper and lower shoe joint surfaces and ensures the smooth progress of the assembly work.

[0035] There are two second brackets 5, and the two second brackets 5 are arranged in parallel at the upper end of the first bracket 4, and the second bracket 5 is perpendicular to the first side wall plate 4-2; the first pulley 6 is arranged between the two second brackets 5, and the central axis of the first pulley 6 is fixed on the two second brackets 5 at both ends.

[0036] One end of the adjusting rod 2 is fixed in the middle of the operating handle 1, and the other end of the adjusting rod 2 is set to an inclined surface; one side of the fixing groove 7 is open, and the bottom surface of the fixing groove 7 on the side of the opening is fixed to the inclined surface, and the baffle 8 is set at the top of the side wall of the fixing groove 7 opposite to the opening. When the connecting rod big end tile cover is assembled in the fixing groove 7, it is easy to cause the tile cover to fall from the front of the fixing groove into the oil pan or even damage the filter screen during installation due to the downward inclination of 45 degrees and the height greater than the height of the fixing groove. The present invention can prevent the tile cover from falling from the front of the fixing groove into the oil pan or even damaging the filter screen during installation by setting a baffle 8 at one end of the fixing groove 7, which is conducive to the smooth progress of the assembly work.

[0037] In the first embodiment, the longitudinal section of the adjusting rod 2 except the inclined end is rectangular, so that the contact surface between the adjusting rod 2 and the first pulley 6 is a plane, which can prevent the adjusting rod 2 from rotating left and right on the first pulley 6 and improve the accuracy of the operation of the adjusting rod 2.

[0038] In the first embodiment, the angle between the inclined surface and the center line of the adjusting rod 2 is 45 degrees, and the adjusting rod 2 is arranged above the first pulley 6. In the vertical direction of the connecting rod, the connecting rod is cut at a 45° angle at the big end, and the 45° angle between the inclined surface and the center line of the adjusting rod 2 makes the fixing groove 7 tilt downward by 45° and just align with the upper end shoe.

[0039] In the first embodiment, the inclined surface is located between the center line of the bottom surface of the fixing groove 7 and one end of the bottom surface. The inclined surface is arranged at one end of the bottom surface of the fixing groove 7, so that no matter which side of the connecting rod cap is installed, it is convenient to install the small end screw of the connecting rod cap first after aligning the upper and lower shoe grooves.

[0040] In the first embodiment, the second bracket 5 and the first bracket 4, the central axis of the first pulley 6 and the two second brackets 5, the adjusting rod 2 and the operating handle 1, and the fixing groove 7 and the inclined surface are all welded and connected, and the baffle 8 is integrally formed with the side wall of the fixing groove 7 opposite to the opening.

[0041] The working principle of the present invention is described below in conjunction with the accompanying drawings:

[0042] When preparing to install the connecting rod big end cap, first, turn the connecting rod so that it is perpendicular to the horizontal plane. At this time, the split cut is at a 45-degree angle to the horizontal plane. The connecting rod is closest to the crankcase inspection hole and is most suitable for the installation of the cap.

[0043] Then, the first bracket 4 is clamped on the inspection hole wall of the crankcase of the diesel engine through the U-shaped groove, and the balancing screw 3 is adjusted to balance the first bracket 4 on the inspection hole wall of the crankcase.

[0044] Next, operate the operating handle 1 and the adjusting rod 2 so that the fixing groove 7 and the baffle 8 pass through the crankcase inspection hole and extend into the crankcase. At the same time, place the adjusting rod 2 on the first pulley 6 and place the connecting rod big end bearing cap in the fixing groove 7.

[0045] Finally, push and pull the operating handle 1 forward and backward or shake it up and down and left and right as needed, so that the adjusting rod 2 can adjust the position of the fixing groove 7 to the connecting rod neck under the action of the pulley, and align the connecting rod big end bearing cap in the fixing groove 7 with the connecting rod big end bearing mouth, insert the first connecting rod screw for the first pre-tightening. Take out the assembly tool of the present invention, turn the car to install the second connecting rod screw for the second pre-tightening, and the installation is completed. The whole process is very simple, light and flexible, and finally tighten it with a hydraulic wrench until the specified engraved line is aligned.

[0046] It can be seen that the present invention arranges a U-shaped groove on the first bracket 4, arranges a first pulley 6 on the second bracket 5, and arranges a fixing groove 7 on the inclined surface of one end of the adjusting rod 2, so that the first bracket 4 can be fixed on the crankcase inspection hole wall. The adjusting rod 2 is manipulated by the operating handle 1 and cooperates with the first pulley 6 to adjust the fixing groove 7 to support the connecting rod big end bearing cover and move it forward and backward and up and down to align the upper and lower bearing mouth mating surfaces, which is conducive to fixing by inserting the connecting rod screws, and can realize fast and accurate assembly of the connecting rod big end bearing cover, reduce the physical consumption and safety risks caused by manually supporting the bearing upward when assembling the connecting rod big end bearing cover, improve the maintenance quality, reduce the manual assembly cost, and has a simple structure, lightness and flexibility.

[0047] Embodiment 2

[0048] In this embodiment, the assembly tool of the present invention also includes a second pulley, which is arranged above the first pulley 6. The central axis of the second pulley is fixed on two second brackets 5 at both ends, and the central axis of the second pulley is parallel to the central axis of the first pulley 6. The adjusting rod 2 is arranged between the first pulley 6 and the second pulley. The angle between the line between the center point of the first pulley 6 and the center point of the second pulley and the horizontal plane is 75 degrees. Using the lever principle and the up and down, left and right gaps between the two pulleys and the adjusting rod 2, the operating handle 1 moves the adjusting rod 2 back and forth, left and right, up and down between the two pulleys through the two pulleys, so as to achieve micro-adjustment of the movement of the fixed groove 7 so that the large end bearing cap in the groove is aligned with the upper end bearing mouth, so as to achieve fast and accurate assembly of the large end bearing cap of the existing connecting rod.

[0049] Obviously, the above embodiments are only some embodiments of the present invention, rather than all embodiments. The above embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention. Based on the above embodiments, all other embodiments obtained by those skilled in the art without making creative work, that is, all modifications, equivalent substitutions and improvements made within the spirit and principles of this application, fall within the protection scope required by the present invention.

Claims

1. A diesel engine connecting rod big end bearing cap assembly tool, characterized in that: It comprises a first bracket (4), a balancing screw (3), a second bracket (5), a first pulley (6), an operating handle (1), an adjusting rod (2), a fixing groove (7), and a baffle (8); The first bracket (4) has a U-shaped groove at the lower end, and the first bracket (4) has two threaded holes at the upper end; there are two balancing screws (3), and the two balancing screws (3) are respectively arranged in corresponding threaded holes; There are two second brackets (5), and the two second brackets (5) are arranged in parallel at the upper end of the first bracket (4); the first pulley (6) is arranged between the two second brackets (5), and the central axis of the first pulley (6) is fixed to the two second brackets (5) at both ends respectively; One end of the adjusting rod (2) is fixed in the middle of the operating handle (1), and the other end of the adjusting rod (2) is arranged to be an inclined surface; one side of the fixing groove (7) is open, and the bottom surface of the fixing groove (7) on the side of the opening is fixed to the inclined surface; the baffle (8) is arranged at the top end of the side wall of the fixing groove (7) opposite to the opening, The diesel engine connecting rod big end bearing cap assembly tool further comprises a second pulley, the second pulley being arranged above the first pulley (6), the central axis of the second pulley being respectively fixed on two second brackets (5) at both ends, the central axis of the second pulley being parallel to the central axis of the first pulley (6), the adjusting rod (2) being arranged between the first pulley (6) and the second pulley, the angle between the line connecting the central point of the first pulley (6) and the central point of the second pulley and the horizontal plane being 75 degrees, The longitudinal section of the portion of the adjusting rod (2) other than the inclined surface end is rectangular, and the angle between the inclined surface and the center line of the adjusting rod (2) is 45 degrees.

2. The diesel engine connecting rod big end bearing cap assembly tool according to claim 1, characterized in that: The adjusting rod (2) is arranged above the first pulley (6).

3. The diesel engine connecting rod big end bearing cap assembly tool according to claim 1, characterized in that: The inclined surface is located between the center line of the bottom surface of the fixing groove (7) and one end of the bottom surface.

4. The diesel engine connecting rod big end bearing cap assembly tool according to claim 1, characterized in that: The first bracket (4) comprises a top plate (4-1), a first side wall plate (4-2), and a second side wall plate (4-3); the first side wall plate (4-2) and the second side wall plate (4-3) are respectively arranged on two opposite sides of the top plate (4-1) to form the U-shaped groove.

5. The diesel engine connecting rod big end bearing cap assembly tool according to claim 4, characterized in that: The first side wall plate (4-2) and the second side wall plate (4-3) are parallel to each other, the distance between the first side wall plate (4-2) and the second side wall plate (4-3) is greater than the wall thickness of the crankcase inspection hole of the diesel engine, and the second bracket (5) is perpendicular to the first side wall plate (4-2).

6. The diesel engine connecting rod big end bearing cap assembly tool according to claim 1, characterized in that: The second bracket (5) and the first bracket (4), the central axis of the first pulley (6) and the two second brackets (5), the adjustment rod (2) and the operating handle (1), and the fixing groove (7) and the inclined surface are all welded together, and the baffle (8) and the side wall of the fixing groove (7) opposite to the opening are integrally formed.

Images