Main bearing cap bolt battery gun tightening device of V-shaped engine

Abstract

The utility model relates to the technical field of engine assembly tools, in particular to a main bearing cap bolt battery gun tightening device of a V-shaped engine, which can effectively reduce labor intensity and improve efficiency, is very wide in usability, and ensures use stability and reliability and safety of operators. The device comprises a battery gun and is characterized in that the output end of the battery gun is connected with one end of a torsion multiplier, the other end of the torsion multiplier is connected with a sleeve with a dodecagonal sleeve head, and a counter-force arm is arranged on the outer wall of the torsion multiplier.

Description

Technical Field

[0001] The utility model relates to the technical field of engine assembly tools, in particular to a battery gun tightening device for main bearing cover bolts of a V-type engine. Background Art

[0002] In a V-type engine, the main bearing cap bolts are located at the bottom of the crankcase. Each main bearing cap is equipped with 4 main bearing cap bolts. Its function is to fasten the connection between the engine body, crankshaft, main bearing shell and main bearing cap. By tightening, the main bearing cap produces a uniform and appropriate axial preload to support and position the crankshaft on the engine body. The main bearing cap bolts generally use a special thread design and have extremely high precision requirements. Its tightening torque and tightening sequence must meet the design standards to ensure firmness, sealing and reliability during operation. In the trial production of new products, the tightening method of the main bearing cap bolts is generally completed by impact pneumatic wrenches and fixed torque wrenches. This method often brings disadvantages such as inconvenient operation, high labor intensity, low torque and angle accuracy, and narrow usability. Summary of the invention

[0003] In order to solve the existing problems of high labor intensity, low efficiency, poor consistency, and narrow applicability of manual labor, the utility model provides a battery gun tightening device for the main bearing cover bolts of a V-type engine, which can effectively reduce labor intensity, improve efficiency, and has a wide range of applicability, ensuring stable and reliable use and the safety of the operator.

[0004] The technical solution is as follows: a battery gun tightening device for the main bearing cover bolts of a V-type engine, used for tightening the battery gun, characterized in that the output end of the battery gun is connected to one end of a torque multiplier, the other end of the torque multiplier is connected to a socket with a twelve-angle socket head, and a reaction arm is provided on the outer wall of the torque multiplier.

[0005] Its further feature is that the reaction arm includes a connecting plate and a reaction rod, the torque multiplier is provided with an external spline, the connecting plate is provided with an internal spline matched with the external spline, the external spline is provided with a retaining ring groove, and when the reaction arm is sleeved on the external spline, it is pressed and fixed by a retaining ring embedded in the retaining ring groove;

[0006] The torque multiplier is provided with a square head, the sleeve is provided with a square hole matched with the square head, and the sleeve is connected with the square head through a fastening screw.

[0007] After adopting the utility model, the battery gun is held in hand, the sleeve is placed on the main bearing cover bolt, the reaction arm is supported on the inner side of the body, and the torque multiplier is driven to drive the sleeve to rotate. Through the principle of the torque multiplier, it is used to amplify the torque applied by the operator, so that a smaller force produces a larger output torque, thereby driving the sleeve to realize disassembly and tightening of the bolts. Multi-angle operation can be achieved again through manual movement. Reaction arms and sleeves of appropriate sizes can also be selected according to different bolts, so that only one battery gun is used to tighten bolts at different angles in one workstation or multiple workstations, which greatly saves costs, improves production efficiency, is simple to operate, has a wide range of applications, and ensures stability and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of the utility model;

[0009] Figure 2 It is a schematic diagram of the battery gun and torque multiplier structure;

[0010] Figure 3 Schematic diagram of the reaction arm structure;

[0011] Figure 4 It is a schematic diagram of the sleeve structure;

[0012] Figure 5 It is a schematic diagram of the fastening screw structure;

[0013] Figure 6 This is a schematic diagram of the utility model in use. DETAILED DESCRIPTION

[0014] See Figures 1 to 5 As shown, a battery gun tightening device for the main bearing cover bolts of a V-type engine is used to tighten a battery gun 1, the output end of the battery gun 1 is connected to one end of a torque multiplier 2, the other end of the torque multiplier 2 is connected to a sleeve 3 with a 12-angle socket head, and a reaction arm 4 is provided on the outer wall of the torque multiplier 2.

[0015] The reaction arm 4 includes a connecting plate 4-1 and a reaction rod 4-2. The torque multiplier 2 is provided with an external spline 2-1. The connecting plate 4-1 is provided with an internal spline 4-3 that cooperates with the external spline 2-1. The external spline 2-1 is provided with a retaining ring groove 2-2. When the reaction arm 4 is mounted on the external spline 2-1, it is pressed and fixed by a retaining ring embedded in the retaining ring groove 2-2.

[0016] A square head 2-3 is provided on the torque multiplier 2, a square hole 3-1 matching with the square head is provided on the sleeve 3, the sleeve 3 is connected with the square head 2-3 by a fastening screw 5, a smooth hole 2-4 is provided on the square head 2-3, the fastening screw 5 includes a smooth rod section 5-1 and a threaded section 5-2, the smooth rod section 5-1 needs to pass through the smooth hole 2-4, the threaded section 5-2 is connected with the threaded hole 3-2 on the sleeve 3, and the 12-angle sleeve head 3-3 on the sleeve 3 is used to cooperate with the main bearing cover bolt.

[0017] The battery gun 1 is powered by a lithium battery 1-1 and is provided with a touch screen 1-2, an indicator light 1-3, a forward and reverse switching key 1-4, and a start button 1-5 is arranged on the grip.

[0018] like Figure 6 As shown, in actual operation, the sleeve 3 on the battery gun is mounted on the main bearing cap bolt 6, and the sleeve 3 and the main bearing cap bolt 6 are positioned by clearance fit, and the reaction arm 4 is supported on the inner side of the body 7 to play a reaction role. The settings are switched through the touch screen 1-2 on the LCD screen, and the forward and reverse switching keys 1-4 are pressed to adjust the rotation direction, and then the start button 1-5 is pressed, and the brushless motor inside the battery gun 1 starts to work, which is similar to a conventional electric screw machine. The torque multiplier 2 is driven to drive the sleeve 3 to rotate. Due to the vertical downward gravity of the battery gun 1 itself, the sleeve 3 is guaranteed not to fall off during rotation. In this way, the sleeve 3 can be driven to disassemble or tighten the main bearing cap bolt 6 more conveniently and easily, and the process requirements can be met, the assembly is completed, and the operation efficiency is improved.

Claims

1. A battery gun tightening device for the main bearing cap bolts of a V-type engine, used for tightening the battery gun, characterized in that: The output end of the battery gun is connected to one end of a torque multiplier, the other end of the torque multiplier is connected to a sleeve with a twelve-angle socket head, and a reaction arm is arranged on the outer wall of the torque multiplier.

2. A battery gun tightening device for main bearing cap bolts of a V-type engine according to claim 1, characterized in that: The reaction arm includes a connecting plate and a reaction rod. The torque multiplier is provided with an external spline. The connecting plate is provided with an internal spline that cooperates with the external spline. The external spline is provided with a retaining ring groove. When the reaction arm is sleeved on the external spline, it is pressed and fixed by a retaining ring embedded in the retaining ring groove.

3. A battery gun tightening device for main bearing cap bolts of a V-type engine according to claim 1, characterized in that: The torque multiplier is provided with a square head, the sleeve is provided with a square hole matched with the square head, and the sleeve is connected with the square head through a fastening screw.

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