Tool and method for fixing connecting rod crosshead assembly and rack

Abstract

The invention relates to a tool and method for fixing a connecting rod crosshead assembly and a rack, the tool comprises a supporting body, an adjusting stud, a cylindrical pin, a bolt and a gasket, the supporting body is a right-angle-shaped component and comprises a supporting plate and a bottom plate, and the supporting plate and the bottom plate are perpendicular to each other and are welded and fixed to the side edge; the adjusting stud is connected to the supporting plate through threads, can move up and down in the vertical direction and is used for supporting the sliding block, the cylindrical pin is connected with the bottom plate and the rack web at the same time so that the fixing tool can be located on the rack web, and the gasket and the bolt are connected with the bottom plate and the rack web so that the fixing tool can be fixed to the rack web. The height of the adjusting stud is adjusted through rotation so as to abut against the sliding block, and therefore the connecting rod crosshead assembly is fixedly connected to the machine frame. The integral dispatching integrity of the cylinder body assembly and the rack assembly is realized, the mounting quality of the main engine is improved, the dispatching and running reliability of the main engine is ensured, the labor intensity of workers is reduced, the working efficiency is improved, and the device has the advantages of simplicity in operation, convenience in adjustment, safety and reliability.

Description

Technical Field

[0001] The invention relates to a manufacturing process of a marine low-speed diesel engine, in particular to a tool and method for fixing a connecting rod crosshead assembly to a frame, belonging to the technical field of diesel engine manufacturing. Background Art

[0002] After the manufacturing and assembly of marine low-speed diesel engines are completed, they must be shipped out of the factory. The cylinder block assembly and the frame assembly are the main components of the main engine. The existing shipping method usually packs and transports the two large pieces separately. However, some shipyards require the cylinder block assembly and the frame assembly to be shipped together. In this way, there is a problem of how to fix the connecting rod crosshead in the frame, which brings difficulties to the shipment of the main engine. Summary of the invention

[0003] The purpose of the present invention is to solve the difficulties in the overall shipment of a cylinder block assembly and a frame assembly for a marine low-speed diesel engine, and to provide a tool and method for fixing a connecting rod crosshead assembly to a frame, so as to achieve the effects of improving operating efficiency, improving the quality of main engine installation, reducing labor intensity and ensuring safety and reliability.

[0004] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0005] A fixing fixture for a connecting rod crosshead assembly and a frame, wherein the connecting rod crosshead assembly includes a connecting rod and a slider, and the frame includes a frame web, characterized in that: the fixing fixture includes a supporting body, an adjusting stud, a cylindrical pin, a bolt and a washer;

[0006] The support body is a right-angled component, including a support plate and a bottom plate that are perpendicular to each other, the support plate and the bottom plate are welded and fixed to each other on the side, the adjusting stud is connected to the support plate by a thread and can move up and down in a vertical direction to support the slider, the cylindrical pin is connected to the bottom plate and the frame web at the same time to position the fixing tool on the frame web, the washer and the bolt connect the bottom plate and the frame web to fix the fixing tool on the frame web; the adjusting stud adjusts its own height by rotating to tighten the slider, thereby fixing the connecting rod crosshead assembly to the frame.

[0007] Furthermore, the support plate is provided with a threaded hole for connecting the adjusting stud.

[0008] Furthermore, the bottom plate is provided with a pin hole for connecting the cylindrical pin, the frame web is provided with a positioning hole, and the cylindrical pin is inserted into the pin hole and the positioning hole to fix the support body and position it on the frame web.

[0009] Furthermore, the cylindrical pin is matched with the pin hole and the positioning hole with a small clearance.

[0010] Furthermore, the bottom plate is provided with waist-shaped holes for passing the bolts.

[0011] Furthermore, reinforcing ribs are fixedly welded between the bottom plate and the support plate, and waist-shaped holes for reducing weight are opened on the reinforcing ribs.

[0012] Furthermore, the adjusting stud comprises a cylindrical portion at the top, a threaded portion in the middle and a hexagonal head at the bottom which are connected in sequence.

[0013] Another technical solution of the present invention is:

[0014] A method for fixing a connecting rod crosshead assembly and a frame using the above-mentioned fixing tool comprises the following specific steps:

[0015] 1) The connecting rod crosshead assembly is positioned at the top dead center by turning the gear;

[0016] 2) Assemble the adjusting stud and the cylindrical pin on the supporting body, and rotate the adjusting stud to the lowest position;

[0017] 3) machining positioning holes at appropriate positions of the frame web, inserting the cylindrical pins into the positioning holes of the frame web, and then fixing the support body to the frame web with the bolts and washers, thereby fixing the fixing fixture to the frame;

[0018] 4) Install another fixing device on the other side of the frame in the same manner as step 3);

[0019] 5) Perform the turning operation so that there is a slight gap between the slider and the top of the adjusting stud without contact;

[0020] 6) Rotate the adjusting stud to raise it until the top of the adjusting stud is in good contact with the slider and is locked;

[0021] 7) Disconnect the connection between the connecting rod and the crankshaft, thereby completing the fixing operation of the connecting rod crosshead assembly on the frame.

[0022] The present invention solves the problem that the connecting rod crosshead assembly is difficult to fix in the frame when the cylinder assembly and the frame assembly of a marine low-speed diesel engine are shipped as a whole, and the beneficial technical effects obtained are as follows:

[0023] The present invention realizes the integrity of the overall shipment of the cylinder assembly and the frame assembly, improves the installation quality of the main engine, ensures the reliability of the shipment and operation of the main engine, reduces the labor intensity of workers, effectively improves the working efficiency, and has the advantages of simple operation, convenient adjustment, safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the present invention.

[0025] Figure 2 yes Figure 1 AA section view.

[0026] Figure 3 yes Figure 1 Top view of the .

[0027] In the figure,

[0028] a—frame belly plate, b—fixing fixture, 1—support body, 2—adjusting stud, 3—cylindrical pin, 4—washer, 5—bolt. DETAILED DESCRIPTION

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments, but the scope of protection of the present invention shall not be limited thereby.

[0030] The invention is used for fixing a connecting rod crosshead assembly and a frame when a low-speed marine diesel engine is shipped as a whole; the connecting rod crosshead assembly comprises a connecting rod and a sliding block, and the frame comprises a frame web.

[0031] Please refer to Figure 1 , Figure 2 and Figure 3 The fixing tool b shown in the figure includes a supporting body 1, an adjusting stud 2, a cylindrical pin 3, a bolt 5 and a washer 4.

[0032] The support body 1 is a right-angled welded part, including a support plate and a base plate that are perpendicular to each other, and the support plate and the base plate are welded and fixed to each other on the side. The support plate 1 is provided with a threaded hole for connecting the adjustment stud 2. The base plate 1 is provided with two waist-shaped holes for passing the bolts 5 and a pin hole for connecting the cylindrical pin 3, and also has a threaded hole for installing specific bolts. The frame web a is provided with a positioning hole, and the cylindrical pin 3 is inserted into the pin hole and the positioning hole to fix the support body 1 and position it on the frame web a. A reinforcing rib is fixedly welded between the base plate and the support plate, and the reinforcing rib is provided with a waist-shaped hole for weight reduction.

[0033] The adjusting stud 2 is a forging, which is connected to the support plate by threads and can move up and down in the vertical direction to support the slider. The adjusting stud 2 includes a cylindrical portion at the top, a threaded portion in the middle, and a hexagonal head at the bottom, which are connected in sequence.

[0034] The cylindrical pin 3 connects the bottom plate and the frame web a at the same time, so as to position the fixing tool b on the frame web a. The cylindrical pin 3 is matched with the pin hole and the positioning hole with a small clearance.

[0035] The washer 4 and the bolt 5 connect the bottom plate and the frame web a, and the fixing fixture b is fixedly connected to the frame web a.

[0036] The adjusting stud 2 adjusts its own height by rotating to tighten the slider, thereby fixing the connecting rod crosshead assembly to the frame.

[0037] The fixing method for the connecting rod crosshead assembly and the frame is as follows: after the connecting rod crosshead assembly is turned to the top dead center, the adjusting stud 2 and the cylindrical pin 3 are pre-assembled with the supporting body 1, and it is ensured that the adjusting stud 2 is completely screwed to the bottom; then the cylindrical pin 3 is inserted into the positioning hole of the frame web a, and then it is fixed to the frame by two bolts 5; the fixing tool B on the other side is installed in the same way; after the installation of the tooling on the front and rear sides is completed, the turning operation is performed until the slider is not in contact with the adjusting stud 2, and then the adjusting stud 2 is rotated to make it in good contact with the slider.

[0038] The fixing method of the present invention comprises the following specific steps:

[0039] 1) The connecting rod crosshead assembly is positioned at the top dead center by turning the gear;

[0040] 2) Assemble the adjusting stud 2 and the cylindrical pin 3 on the supporting body 1, and rotate the adjusting stud 2 to the lowest position;

[0041] 3) machining a positioning hole at a suitable position of the frame web a, inserting the cylindrical pin 3 into the positioning hole of the frame web a, and then fixing the support body 1 to the frame web a through the bolt 5 and the washer 4, thereby fixing the fixing tool b to the frame;

[0042] 4) Install another fixing tool b on the other side of the frame in the same manner as step 3);

[0043] 5) Perform the turning operation so that there is a slight gap between the slider and the top of the adjusting stud 2 without contact;

[0044] 6) Rotate the adjusting stud 2 to raise it until the top of the adjusting stud 2 is in good contact with the slider and is locked;

[0045] 7) Disconnect the connection between the connecting rod and the crankshaft, thereby completing the fixing operation of the connecting rod crosshead assembly on the frame.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. All equivalent changes and modifications made according to the content of the present application should be within the technical scope of the present invention.

Claims

1. A fixing fixture for a connecting rod crosshead assembly and a frame, wherein the connecting rod crosshead assembly includes a connecting rod and a slider, and the frame includes a frame web, characterized in that: The fixing fixture comprises a supporting body, an adjusting stud, a cylindrical pin, a bolt and a washer; The support body is a right-angled component, including a support plate and a bottom plate that are perpendicular to each other, the support plate and the bottom plate are welded and fixed to each other on the side, the adjusting stud is connected to the support plate by a thread and can move up and down in a vertical direction to support the slider, the cylindrical pin is connected to the bottom plate and the frame web at the same time to position the fixing tool on the frame web, the washer and the bolt connect the bottom plate and the frame web to fix the fixing tool on the frame web; the adjusting stud adjusts its own height by rotating to tighten the slider, thereby fixing the connecting rod crosshead assembly to the frame.

2. The tooling for fixing the connecting rod crosshead assembly to the frame according to claim 1 is characterized in that: The support plate is provided with a threaded hole for connecting the adjusting stud.

3. The tooling for fixing the connecting rod crosshead assembly to the frame according to claim 1 is characterized in that: The bottom plate is provided with a pin hole for connecting the cylindrical pin, the frame web is provided with a positioning hole, the cylindrical pin is inserted into the pin hole and the positioning hole, and the support body is fixedly connected and positioned on the frame web.

4. The tooling for fixing the connecting rod crosshead assembly to the frame according to claim 3 is characterized in that: The cylindrical pin is matched with the pin hole and the positioning hole with a small gap.

5. The tooling for fixing the connecting rod crosshead assembly to the frame according to claim 1, characterized in that: The bottom plate is provided with waist-shaped holes for passing the bolts.

6. The tooling for fixing the connecting rod crosshead assembly to the frame according to claim 1, characterized in that: A reinforcing rib is fixedly welded between the bottom plate and the support plate, and a waist-shaped hole for reducing weight is opened on the reinforcing rib.

7. The tooling for fixing the connecting rod crosshead assembly to the frame according to claim 1, characterized in that: The adjusting stud comprises a cylindrical portion at the top, a threaded portion in the middle and a hexagonal head at the bottom which are connected in sequence.

8. A method for fixing a connecting rod crosshead assembly and a frame using the fixing fixture of claim 1, characterized in that: The fixing method comprises the following specific steps: 1) The connecting rod crosshead assembly is positioned at the top dead center by turning the gear; 2) Assemble the adjusting stud and the cylindrical pin on the supporting body, and rotate the adjusting stud to the lowest position; 3) machining positioning holes at appropriate positions of the frame web, inserting the cylindrical pins into the positioning holes of the frame web, and then fixing the support body to the frame web with the bolts and washers, thereby fixing the fixing fixture to the frame; 4) Install another fixing device on the other side of the frame in the same manner as step 3); 5) Perform the turning operation so that there is a slight gap between the slider and the top of the adjusting stud without contact; 6) Rotate the adjusting stud to raise it until the top of the adjusting stud is in good contact with the slider and is locked; 7) Disconnect the connection between the connecting rod and the crankshaft, thereby completing the fixing operation of the connecting rod crosshead assembly on the frame.

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