A crankcase bearing cover horizontal bolt turning tool

Abstract

The present invention relates to a crankcase bearing cover horizontal bolt wrenching tool, belonging to the technical field of crankcase auxiliary tools, which comprises a support plate fixedly mounted on the top of the crankcase side wall by a hook, wrenches matching the crankcase side bolts are fixedly arranged on both sides of the support plate, the distance between the two wrenches is the same as the distance between the bolts on the crankcase, the ends of the wrenches are provided with grooves matching the size of the crankcase bolts, the wrenches are rotatably mounted away from the ends of the crankcase with a dial, the ends of the wrenches extending out of the dial are provided with a wrench, and the tightness of the crankcase bolts is adjusted by twisting the wrench with a wrench. The present invention has the effects of reducing operation errors, improving bolt tightening accuracy, reducing bolt tightening operation time, and making the operation convenient and simple.

Description

Technical Field

[0001] The invention relates to a crankcase bearing cover horizontal bolt turning tool, belonging to the technical field of crankcase auxiliary tools. Background Art

[0002] The crankcase is a key component of the diesel engine, and its processing quality has a fatal impact on the diesel engine. In order to ensure the processing quality of the crankshaft hole, the bearing cap is required to be processed together after being installed on the crankcase. In order to ensure the installation quality of the bearing cap on the crankcase, the tightening of the horizontal bolts of the bearing cap is required to be carried out by pre-tightening and twice angle tightening.

[0003] The existing tightening method is: when tightening the horizontal bolts, the operator uses manual marking to tighten the angle, that is, after pre-tightening the bolts according to the torque requirements, use a marker to mark the hexagonal head of the bolt, and then mark the corresponding position of the crankcase according to the tightening angle, and then screw the bolts to align the markings to complete the installation of the bearing cover. Disadvantages of the existing technology: 1. The operation error is large and cannot meet the requirements of high precision. 2. The operation is inconvenient, time-consuming, and the tightening efficiency is low. Summary of the invention

[0004] The purpose of the present invention is to provide a crankcase bearing cover horizontal bolt turning tool, which has the effects of reducing operating errors, improving bolt tightening accuracy, reducing bolt tightening operation time, and making the operation convenient and simple.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A crankcase bearing cover horizontal bolt turning tool comprises a support plate fixedly mounted on the top of the crankcase side wall by a hook, wrenches matching the crankcase side bolts are fixedly arranged on both sides of the support plate, the distance between the two wrenches is the same as the distance between the bolts on the crankcase, the ends of the wrenches are provided with grooves matching the size of the crankcase bolts, the wrenches are rotatably installed away from the end of the crankcase, and a wrench is arranged on the end of the wrench extending out of the dial, and the tightness of the crankcase bolts can be adjusted by turning the wrench with a wrench.

[0007] A further improvement of the technical solution of the present invention is that a butterfly nut is installed on the hook and a thread is provided on the hook.

[0008] A further improvement of the technical solution of the present invention is that: the wrench head is covered with a retaining ring, and the retaining ring is arranged between the dial and the wrench.

[0009] A further improvement of the technical solution of the present invention is that the retaining ring is fixedly mounted on the dial by countersunk screws.

[0010] A further improvement of the technical solution of the present invention is that the hook is L-shaped and is clamped and fixed on the upper end of the crankcase by twisting the butterfly nut.

[0011] A further improvement of the technical solution of the present invention is that a pressure spring and a steel ball for zeroing the scale are arranged at the position of the lever corresponding to the scale.

[0012] Due to the adoption of the above technical solution, the technical effects achieved by the present invention are as follows:

[0013] The present invention designs a plate tool for tightening bolts of a crankcase. By utilizing a dial to tighten the bolt angle, the operation error is small and the tightening accuracy of the bolt is high. The traditional tightening method of manual marking is changed, and the tightening operation time is short and the operation is convenient and simple.

[0014] The present invention provides a retaining ring between the wrench and the dial, the retaining ring is made of elastic material, and can prevent the wrench from wearing and fading the dial, thereby preventing the numbers on the dial from being worn away.

[0015] The present invention installs the entire plate-sizing tool on the box wall of the crankcase by arranging a butterfly nut and a hook, and has a simple structure, convenient operation and easy disassembly.

[0016] The invention fixes the retaining ring on the scale plate by means of a countersunk screw, and when the wrench is hung on the wrench head, the retaining ring can be tightly fitted to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a partial structural front view of the present invention.

[0019] Among them, 1. countersunk screw, 2. support plate, 3. dial, 4. retaining ring, 5. spanner, 6. pressure spring, 7. steel ball, 8. hook, 9. butterfly nut, 10. wrench, 11. spanner. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0021] The crankcase is a key component of the diesel engine. To ensure the installation quality of the bearing cover on the crankcase, the horizontal bolts of the bearing cover must be tightened by pre-tightening and then tightening at an angle twice. The existing tightening method is: when tightening the horizontal bolts, the operator uses manual marking to tighten at an angle, that is, after pre-tightening the bolts according to the torque requirements, use a marker to mark the hexagonal head of the bolt, and then mark the corresponding position of the crankcase according to the tightening angle, and then tighten the bolts to align the marked lines to complete the installation of the bearing cover. Figure 1-2 As shown, a crankcase bearing cover horizontal bolt plate measurement tool provided by the present invention.

[0022] The plate-sizing tool of the present invention comprises a support plate 2, which is an annular plate-shaped structure, and a semicircular protrusion is integrally formed in the middle of the support plate 2, and a hook 8 is installed in the protrusion, and the hook 8 is L-shaped, and a butterfly nut 9 is fixedly installed at one end of the hook 8 away from the corner. In a specific embodiment, the butterfly nut 9 can be selected to have a specification of M8×1.25, so that the hook 8 does not fall from the protrusion, and at the same time, a thread is provided on the hook 8, and the hook 8 can be adjusted to be extended and retracted by twisting the butterfly nut 9, so as to fix the support plate 2 to the upper end wall of the crankcase.

[0023] Bolts are fixedly installed on the upper ends of both sides of the crankcase, and a lever 11 is fixedly installed at the position of the support plate 2 corresponding to the two bolts. The lever 11 is set in the same direction as the bolts. The lever 11 is a cylindrical structure. A regular hexagonal groove matching the bolt is opened on the surface of the lever 11 corresponding to the bolt on the crankcase. The lever 11 is sleeved on the bolt, and a circular boss concentric with the lever 11 is set between the lever 11 and the support plate 2 to clamp the lever 11 to prevent the lever 11 from moving longitudinally; when the lever 11 extends out of the support plate Part of the plate 2 is covered with a dial 3, and the dial 3 and the lever column 11 can rotate relative to each other. A pressure spring 6 and a steel ball 7 are radially installed along the lever column 11 at a position corresponding to the dial 3 in the lever column 11. The size of the pressure spring 6 is 0.5×4.5×15, and the size of the steel ball 7 is Φ6. They are used to zero the dial 3 and ensure the accuracy of the dial. A plurality of relative circular grooves are provided on the inner wall of the dial 3 at positions corresponding to the steel balls 7, and the steel balls 7 are inserted into the circular grooves for adjustment.

[0024] A wrench head 5 is welded or integrally formed on the lever column 11 extending out of the dial 3. The wrench head 5 is coaxially arranged with the lever column 11 and is a regular hexagonal prism-shaped structure. The bolts on the crankcase are tightened by rotating the wrench 10 on the wrench head 5. At the same time, a retaining ring 4 is arranged between the dial 3 and the wrench 10. The retaining ring 4 is made of a circular elastic material and is fixedly mounted on the dial 3 by three M4×8 countersunk screws 1 to prevent the wrench 10 from rubbing against the dial 3 to prevent wear and tear on the dial 3.

[0025] Specific implementation of this embodiment: When in use, after the crankcase is pre-tightened with bolts, the lever 11 of the plate tool of the present invention is sleeved on the head of the bolt, and the hook 8 is hung on the wall of the crankcase by screwing the butterfly nut 9, so that the entire tool and the crankcase are kept in a fixed state. At this time, the lever 11 is perpendicular to the side wall of the crankcase. Adjust the scale on the dial 3 to zero, that is, the steel ball 7 is stuck in the circular groove on the inner wall of the dial 3, and then tighten according to the scale. Since the inner wall of the dial 3 has two circular grooves, the bolt is tightened with high precision, and it will not be over-tightened or under-tightened. The operation time of tightening the bolt is short, and the operation is convenient.

[0026] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, principle, etc. of the present invention should be included in the protection scope of the present invention.

Claims

1. A crankcase bearing cover horizontal bolt turning tool, characterized by: The invention comprises a support plate (2) fixedly mounted on the top of the crankcase side wall by a hook (8), levers (11) matching the crankcase side bolts are fixedly arranged on both sides of the support plate (2), the distance between the two levers (11) is the same as the distance between the bolts on the crankcase, the ends of the levers (11) are provided with grooves matching the size of the crankcase bolts, the levers (11) are rotatably mounted away from the end of the crankcase with a dial (3), the end of the lever (11) extending out of the dial (3) is provided with a wrench (5), and the tightness of the crankcase bolts is adjusted by twisting the wrench (5) with a wrench (10); A butterfly nut (9) is mounted on the hook (8), and a thread is provided on the hook (8); a retaining ring (4) is sleeved on the spanner head (5), and the retaining ring (4) is arranged between the dial (3) and the spanner (10); The retaining ring (4) is fixedly mounted on the dial (3) by means of a countersunk screw (1); The hook (8) is L-shaped and is fixed to the upper end of the crankcase by twisting the butterfly nut (9); A pressure spring (6) and a steel ball (7) for zeroing the scale plate are arranged at a position corresponding to the scale plate (3) in the lever column (11); When in use, after the crankcase is pre-tightened with bolts, the lever (11) of the tool is placed on the head of the bolt, and the hook (8) is hung on the wall of the crankcase by screwing the butterfly nut (9), so that the entire tool and the crankcase are kept fixed; at this time, the lever (11) is perpendicular to the side wall of the crankcase; the scale on the dial (3) is adjusted to zero, that is, the steel ball (7) is stuck in the circular groove on the inner wall of the dial (3), and then the tightening operation is performed according to the scale.

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