Internal combustion locomotive rocker arm box cover fastening device

Abstract

The utility model discloses a diesel locomotive rocker arm box cover fastening device which comprises a first press-fitting plate, a second press-fitting plate and a third press-fitting plate, the second press-fitting plate and the third press-fitting plate are connected with the left end and the right end of the first press-fitting plate respectively, and the first press-fitting plate comprises a first press-fitting plate body, a first threaded hole, a first puller bolt and a first rubber pad. The first rubber pad is arranged on the side, close to the rocker arm box cover, of the first press-fitting plate body and the end of the first puller bolt, the first threaded hole is formed in the middle of the first press-fitting plate body, and the first threaded hole penetrates through the first press-fitting plate body and the first rubber pad. When the rocker arm box cover is fastened through the U-shaped structure formed by the first press-fitting plate, the second press-fitting plate and the third press-fitting plate, the positions of the second press-fitting plate and the third press-fitting plate are fixed, so that the rocker arm box cover is fixed through the first press-fitting plate, the second press-fitting plate and the third press-fitting plate; the problem that fixing is time-consuming after the rocker arm box cover loosens or falls off is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of rocker box cover components, in particular to a rocker box cover fastening device for an internal combustion locomotive. Background Art

[0002] At present, domestic railway freight trains run continuously for a long time on long uphill slopes. The diesel engine, the heart of the diesel locomotive, runs at full load. With the long-term mechanical vibration of the moving parts and the fatigue of the parts, the rocker box cover of the diesel engine often falls off or loosens, resulting in serious oil leakage. At this time, the diesel engine needs to be shut down for temporary bundling. The shutdown of the diesel engine causes the train to lose traction, causing the train to stop in the section, which seriously affects the railway traffic order and reduces the transportation efficiency. Therefore, it is necessary to design a device that can urgently reinforce the rocker box cover of the diesel locomotive when the rocker box cover of the diesel locomotive is loose or falls off, so as to avoid the problem of reduced transportation efficiency due to the train stopping in the section. Utility Model Content

[0003] The utility model aims to overcome the deficiencies in the above-mentioned prior art and provides a device for fastening a rocker box cover of a diesel locomotive. When the rocker box cover of the diesel locomotive is fastened by a U-shaped structure formed by a first pressing plate, a second pressing plate and a third pressing plate, the positions of the second pressing plate and the third pressing plate are fixed, so that the first pressing plate, the second pressing plate and the third pressing plate fix the position of the rocker box cover of the diesel locomotive, thereby solving the problem that the fixing of the rocker box cover of the diesel locomotive after it is loose or falls off is time-consuming, affecting the railway driving order and causing low transportation efficiency.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a fastening device for a rocker box cover of a diesel locomotive, comprising a first press plate, a second press plate and a third press plate, the ends of the second press plate along the length direction and the ends of the third press plate along the length direction are respectively connected to the left and right ends of the first press plate, the first press plate comprises a first press plate body, a first threaded hole, a first tightening bolt and a first rubber pad, the first rubber pad is arranged on one side of the first press plate body close to the rocker box cover of the diesel locomotive and on the end of the first tightening bolt, the first threaded hole is arranged in the middle of the first press plate body, the first threaded hole passes through the first press plate body and the first rubber pad, and the external thread of the first tightening bolt matches the internal thread of the first threaded hole.

[0005] Preferably, first auxiliary extension plates are respectively provided at the left and right ends of the first pressing plate body, the first auxiliary extension plates are arranged at the first pressing plate body, and the first auxiliary extension plates can move along the extension direction of the first pressing plate body.

[0006] Preferably, the second press-fit plate has the same structure as the third press-fit plate, and the second press-fit plate includes a second press-fit plate body, a second threaded hole and a second fastening bolt. The second press-fit plate body is an L-shaped structure, and the vertical end of the second press-fit plate body is connected to the end of the first press-fit plate body along the length direction. The second threaded hole is arranged at the lateral end of the second press-fit plate body, and the external thread of the second fastening bolt matches the internal thread of the second threaded hole.

[0007] Preferably, the second pressing plate also includes a third threaded hole, a second rubber pad and a second tightening bolt, the second rubber pad is arranged at the vertical end of the second pressing plate body and the threaded end of the second tightening bolt, the third threaded hole passes through the vertical end of the second pressing plate body and the second rubber pad, the third threaded hole is located in the middle of the vertical end of the second pressing plate body, and the second tightening bolt is arranged in the third threaded hole.

[0008] Preferably, a second auxiliary extension plate is provided at the end of the vertical end of the second pressing plate body away from the lateral end, and the second auxiliary extension plate is provided on the second pressing plate body. The second auxiliary extension plate can extend or contract along the extension direction of the vertical end of the second pressing plate body.

[0009] Preferably, the connection between the second pressing plate body and the first pressing plate body is configured as an arc structure.

[0010] Preferably, the first pressing plate, the second pressing plate and the third pressing plate are all made of steel plates, and the steel plates have a width of 60 mm and a thickness of 5 mm.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] 1. When the U-shaped structure formed by the first pressing plate, the second pressing plate and the third pressing plate is used to fasten the rocker box cover of the internal combustion engine locomotive, the positions of the second pressing plate and the third pressing plate are fixed, so that the first pressing plate, the second pressing plate and the third pressing plate fix the position of the rocker box cover of the internal combustion engine locomotive, thereby solving the problem that the rocker box cover of the internal combustion engine locomotive is loose or falls off and the fixing takes a long time, affecting the railway driving order and causing low transportation efficiency.

[0013] 2. The utility model cooperates with the first pressing plate body and the first extension plate, cooperates with the second pressing plate body and the second extension plate, and the third pressing plate has the same structure as the second pressing plate. The lengths of the first pressing plate, the second pressing plate and the third pressing plate are adjusted so that the first pressing plate, the second pressing plate and the third pressing plate can be adapted to the rocker box covers of diesel locomotives with different widths and thicknesses, thereby improving the applicability of the fastening device.

[0014] 3. The first pressing plate of the utility model is provided with a first threaded hole, the second pressing plate is provided with a third threaded hole, the third pressing plate has the same structure as the second pressing plate, and the first tightening bolt passes through the first threaded hole, and the second tightening bolt passes through the third threaded hole, so that the first tightening bolt and the second tightening bolt are respectively tightened against the side wall of the rocker box cover of the diesel locomotive, thereby improving the reliability of the fastening device tightening the rocker box cover of the diesel locomotive.

[0015] 4. The first pressing plate and the first tightening bolt of the utility model are both provided with a first rubber pad on one side close to the rocker box cover of the internal combustion engine vehicle, and the second pressing plate, the third pressing plate and the second tightening bolt are both provided with a second rubber pad on one side close to the rocker box cover of the internal combustion engine vehicle. The first rubber pad and the second rubber pad are used to avoid direct contact between the fastening device and the rocker box cover of the internal combustion engine vehicle, thereby extending the service life of the fastening device.

[0016] The present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 This is a schematic structural diagram of the first press-fit plate of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the second press-fit plate of the utility model.

[0020] Description of reference numerals:

[0021] 1—first press-fit plate; 1-1—first press-fit plate body;

[0022] 1-2—first threaded hole; 1-3—first tightening bolt; 1-4—first rubber pad;

[0023] 1-5—first auxiliary extension plate; 1-6—fourth threaded hole;

[0024] 1-7—fifth threaded hole; 2—second press-fit plate;

[0025] 2-1—second press-fit plate body; 2-2—second threaded hole;

[0026] 2-3—second fastening bolt; 2-4—third threaded hole; 2-5—second rubber pad;

[0027] 2-6—second tightening bolt; 2-7—second auxiliary extension plate;

[0028] 2-8—sixth threaded hole; 2-9—seventh threaded hole; 3—third press-fit plate. DETAILED DESCRIPTION

[0029] like Figure 1 As shown, the utility model includes a first press plate 1, a second press plate 2 and a third press plate 3. The ends of the second press plate 2 and the third press plate 3 along the length direction are respectively connected to the left and right ends of the first press plate 1. The first press plate 1 includes a first press plate body 1-1, a first threaded hole 1-2, a first tightening bolt 1-3 and a first rubber pad 1-4. The first rubber pad 1-4 is arranged on one side of the first press plate body 1-1 close to the rocker box cover of the diesel locomotive and on the end of the first tightening bolt 1-3. The first threaded hole 1-2 is arranged in the middle of the first press plate body 1-1. The first threaded hole 1-2 passes through the first press plate body 1-1 and the first rubber pad 1-4. The external thread of the first tightening bolt 1-3 matches the internal thread of the first threaded hole 1-2.

[0030] The utility model is suitable for fixing the rocker box cover of a diesel locomotive. When the rocker box cover of the diesel locomotive falls off or becomes loose, the first pressing plate 1 is contacted with the front side of the rocker box cover of the diesel locomotive, the second pressing plate 2 is contacted with one side wall of the rocker box cover of the diesel locomotive, and the third pressing plate 3 is contacted with the other side wall of the rocker box cover of the diesel locomotive. The second pressing plate 2 and the third pressing plate 3 are fixed so that the first pressing plate 1 is always kept in a fixed position, and then the first tightening bolt 1-3 is screwed into the first threaded hole 1-2 so that the first tightening bolt 1-3 is tightened against the rocker box cover of the diesel locomotive, thereby achieving the purpose of fixing the rocker box cover of the diesel locomotive. In addition, the utility model is simple to operate and convenient to carry, thereby improving the personal safety of the staff and avoiding the problem of train section parking due to the long time of the staff fixing the rocker box cover of the diesel locomotive.

[0031] One side of the first press plate body 1-1 is in contact with the rocker box cover of the internal combustion engine. In order to extend the service life of the first press plate body 1-1, a first rubber pad 1-4 is arranged at the contact position between the first press plate body 1-1 and the rocker box cover of the internal combustion engine. The size of the first rubber pad 1-4 matches the size of the first press plate body 1-1, so that the first rubber pad 1-4 covers the side of the first press plate body 1-1 close to the rocker box cover of the internal combustion engine, thereby reducing the wear of the first press plate body 1-1 and the rocker box cover of the internal combustion engine caused by vibration during the operation of the train; the size of the first rubber pad 1-4 can also be smaller than the size of the first press plate body 1-1. At this time, the first rubber pad 1-4 is arranged at the contact position between the first press plate body 1-1 and the rocker box cover of the internal combustion engine.

[0032] The first tightening bolt 1-3 passes through the first threaded hole 1-2 and is tightened against the rocker box cover of the diesel locomotive. A first rubber pad 1-4 is provided at the threaded end of the first tightening bolt 1-3 to reduce the friction between the first tightening bolt 1-3 and the rocker box cover of the diesel locomotive.

[0033] like Figure 1 , Figure 2 As shown, first auxiliary extension plates 1-5 are respectively provided at the left and right ends of the first pressing plate body 1-1. The first auxiliary extension plates 1-5 are arranged at the first pressing plate body 1-1 and can move along the extension direction of the first pressing plate body 1-1.

[0034] In a possible embodiment, the left and right ends of the first pressing plate body 1-1 are hollow structures, and a plurality of fourth threaded holes 1-6 are arranged at intervals on the side walls of the hollow structures at the left and right ends of the first pressing plate body 1-1. The length of the first auxiliary extension plate 1-5 is consistent with the length of the hollow structures at the left and right ends of the first pressing plate body 1-1, so that the first auxiliary extension plate 1-5 can be stored in the hollow structure. The height of the first auxiliary extension plate 1-5 is consistent with the height of the hollow structure of the first pressing plate body 1-1, so that the first auxiliary extension plate 1-5 can fill the hollow structure. The first auxiliary extension plate 1-5 is arranged at intervals on the side walls corresponding to the fourth threaded holes 1-6. There are multiple fifth threaded holes 1-7, and the inner diameter of the fifth threaded hole 1-7 is consistent with the inner diameter of the fourth threaded hole 1-6; the first auxiliary extension plate 1-5 moves left and right along the length direction of the first press plate body 1-1 to adjust the length of the first press plate 1. When the first auxiliary extension plate 1-5 moves to the target position, the bolt passes through the fourth threaded hole 1-6 and is threadedly connected with the fifth threaded hole 1-7 to fix the position of the first auxiliary extension plate 1-5 and the first press plate body 1-1. By adjusting the length of the first auxiliary extension plate 1-5 in the hollow structure of the first press plate body 1-1, the first press plate 1 can be adapted to rocker box covers of diesel locomotives of different sizes.

[0035] In another possible embodiment, the first pressing plate body 1-1 is a square structure, the first auxiliary extension plate 1-5 is a square structure, the width of the first auxiliary extension plate 1-5 is consistent with the width of the first pressing plate body 1-1, and the first auxiliary extension plate 1-5 is respectively provided with slideways (not shown in the figure) at both ends along the width, and the slideways are arranged along the side of the first auxiliary extension plate 1-5, so that the first pressing plate body 1-1 can be installed in the slideways, and the left and right ends of the first pressing plate body 1-1 along the length direction are respectively installed in the slideways of the first auxiliary extension plates 1-5 located on the left and right sides of the first pressing plate body 1-1, and the first auxiliary extension The plates 1-5 are stretched toward both ends along the length direction of the first pressing plate body 1-1, respectively, so that the length of the first pressing plate 1 can be extended. The first auxiliary extension plates 1-5 located on the left and right sides of the first pressing plate body 1-1 are approached to each other along the length direction of the first pressing plate body 1-1, respectively, so that the length of the first pressing plate 1 can be shortened. After the first auxiliary extension plate 1-5 is stretched or shortened to the target position, the position of the first auxiliary extension plate 1-5 is fixed by the locking mechanism of the slide, or the first auxiliary extension plate 1-5 is fixed to the position of the first pressing plate body 1-1 by bolts, and the length adjustment of the first pressing plate 1 is completed.

[0036] like Figure 1 , Figure 3 As shown, the second press plate 2 has the same structure as the third press plate 3. The second press plate 2 includes a second press plate body 2-1, a second threaded hole 2-2 and a second fastening bolt 2-3. The second press plate body 2-1 is an L-shaped structure. The vertical end of the second press plate body 2-1 is connected to the end of the first press plate body 1-1 along the length direction. The second threaded hole 2-2 is arranged at the lateral end of the second press plate body 2-1. The external thread of the second fastening bolt 2-3 matches the internal thread of the second threaded hole 2-2.

[0037] The second threaded hole 2-2 is threadedly connected to the original locomotive rocker box cover mounting bolt, and the second press plate 2 is fixed to the locomotive rocker box cover mounting bolt by a clamping nut, so that the first press plate 1 keeps pressing the locomotive rocker box cover.

[0038] In a possible embodiment, the number of the second threaded holes 2-2 is at least two, and the plurality of the second threaded holes 2-2 are arranged along the length direction of the lateral end of the second pressing plate body 2-1. The second fastening bolts 2-3 pass through the second threaded holes 2-2 and are fastened to the vehicle wall to form a fixed fulcrum, so that the second pressing plate 2, the third pressing plate 3 and the first pressing plate 1 remain in contact with the rocker box cover of the diesel locomotive, thereby preventing the rocker box cover of the diesel locomotive from falling off.

[0039] like Figure 1 , Figure 3As shown, the second pressing plate 2 also includes a third threaded hole 2-4, a second rubber pad 2-5 and a second tightening bolt 2-6. The second rubber pad 2-5 is arranged at the vertical end of the second pressing plate body 2-1 and the threaded end of the second tightening bolt 2-6. The third threaded hole 2-4 penetrates the vertical end of the second pressing plate body 2-1 and the second rubber pad 2-5. The third threaded hole 2-4 is located in the middle of the vertical end of the second pressing plate body 2-1. The second tightening bolt 2-6 is arranged in the third threaded hole 2-4.

[0040] A second rubber pad 2-5 is arranged on the side of the vertical end of the second pressing plate body 2-1 close to the rocker box cover of the diesel locomotive to prevent the second pressing plate body 2-1 from rubbing against the rocker box cover of the diesel locomotive during the operation of the train, thereby preventing wear of the second pressing plate body 2-1 and the rocker box cover of the diesel locomotive. At the same time, the second tightening bolt 2-6 is passed through the third threaded hole 2-4 so that the second tightening bolt 2-6 can be tightened against the side wall of the rocker box cover of the diesel locomotive. A second rubber pad 2-5 is arranged at the threaded end of the second tightening bolt 2-6 to prevent the second tightening bolt 2-6 from directly contacting the side wall of the rocker box cover of the diesel locomotive, thereby preventing wear of the second tightening bolt 2-6 and the side wall of the rocker box cover of the diesel locomotive.

[0041] like Figure 3 As shown, a second auxiliary extension plate 2-7 is provided at the end of the vertical end of the second pressing plate body 2-1 away from the lateral end. The second auxiliary extension plate 2-7 is provided on the second pressing plate body 2-1. The second auxiliary extension plate 2-7 can extend or shrink along the extension direction of the vertical end of the second pressing plate body 2-1.

[0042] In a possible embodiment, the end of the vertical end of the second pressing plate body 2-1 away from the lateral end is a hollow structure, and a plurality of sixth threaded holes 2-8 are arranged at intervals on the side wall of the hollow structure of the second pressing plate body 2-1. A second auxiliary extension plate 2-7 is arranged in the hollow structure of the second pressing plate body 2-1. The length of the second auxiliary extension plate 2-7 is consistent with the length of the hollow structure of the second pressing plate body 2-1, so that the second auxiliary extension plate 2-7 can be stored in the hollow structure. The height of the second auxiliary extension plate 2-7 is consistent with the height of the hollow structure of the second pressing plate body 2-1, so that the second auxiliary extension plate 2-7 can fill the hollow structure. The second auxiliary extension plate 2-7 and the sixth threaded holes 2-8 A plurality of seventh threaded holes 2-9 are arranged at intervals on the corresponding side walls, and the inner diameter of the seventh threaded hole 2-9 is consistent with the inner diameter of the sixth threaded hole 2-8; the second auxiliary extension plate 2-7 moves along the length direction of the vertical end of the second press plate body 2-1, and the length of the vertical end of the second press plate 2 can be adjusted. When the second auxiliary extension plate 2-7 moves to the target position, the bolt passes through the sixth threaded hole 2-8 and is threadedly connected with the seventh threaded hole 2-9, so that the position of the second auxiliary extension plate 2-7 and the second press plate body 2-1 is fixed, and by adjusting the length of the second auxiliary extension plate 2-7 in the hollow structure of the second press plate body 2-1, the second press plate 2 can be suitable for rocker box covers of diesel locomotives with different thicknesses.

[0043] In another possible embodiment, the structure of the second auxiliary extension plate 2-7 is the same as the structure of the vertical end of the second press-fit plate body 2-1, and the width of the second auxiliary extension plate 2-7 is consistent with the width of the second press-fit plate body 2-1. The second auxiliary extension plate 2-7 is respectively provided with slideways (not shown in the figure) at both ends along the width. The slideways are arranged along the sides of the second auxiliary extension plate 2-7 so that the second press-fit plate body 2-1 can be installed in the slideways. The end of the vertical end of the second press-fit plate body 2-1 away from the lateral end is installed in the slideway of the second auxiliary extension plate 2-7. The second auxiliary extension plate 2-7 is provided along the length of the vertical end of the second press-fit plate body 2-1. When the second auxiliary extension plate 2-7 extends outward along the length direction of the vertical end of the second pressing plate body 2-1, the length of the vertical end of the second pressing plate 2 can be extended. When the second auxiliary extension plate 2-7 shrinks inward along the length direction of the vertical end of the second pressing plate body 2-1, the length of the vertical end of the second pressing plate 2 can be shortened. After the second auxiliary extension plate 2-7 is extended or contracted to the target position, the position of the second auxiliary extension plate 2-7 is fixed by the locking mechanism of the slide, or the second auxiliary extension plate 2-7 is fixed to the position of the second pressing plate body 2-1 by bolts, and the length adjustment of the second pressing plate 2 is completed.

[0044] like Figure 1 As shown, the connection between the second pressing plate body 2-1 and the first pressing plate body 1-1 is configured as an arc structure.

[0045] The second pressing plate body 2-1 is fixedly connected to the first pressing plate body 1-1, and the connection between the second pressing plate body 2-1 and the first pressing plate body 1-1 is set to an arc structure to avoid accidental injuries when the staff installs the fastening device due to the right-angle connection between the second pressing plate body 2-1 and the first pressing plate body 1-1.

[0046] The first pressing plate 1 , the second pressing plate 2 and the third pressing plate 3 are all made of steel plates with a width of 60 mm and a thickness of 5 mm.

[0047] The first press plate 1 , the second press plate 2 and the third press plate 3 are all made of steel plates with a width of 60 mm and a thickness of 5 mm, which can meet the strength requirements of the first press plate 1 , the second press plate 2 and the third press plate 3 .

[0048] When in use, the first press plate 1 is adjusted to the target length by cooperating with the first auxiliary extension plate 1-5 and the first press plate body 1-1, so that the length of the first press plate 1 is consistent with the width of the rocker box cover of the internal combustion engine; the second press plate 2 is adjusted to the target length by cooperating with the second auxiliary extension plate 2-7 and the second press plate body 2-1, so that the length of the second press plate 2 is consistent with the thickness of the rocker box cover of the internal combustion engine. The third press plate 3 is adjusted in the same way as the second press plate 2. The third press plate 3 is adjusted to the same length as the second press plate 2, and then the first press plate 1, the second press plate 2, and the third press plate 3 are respectively pressed against the front, left, and right sides of the rocker box cover of the internal combustion engine, and the second threaded hole 2-2 at the lateral end of the second press plate 2 and the second fastening bolt 2-3 are cooperated to fix

[0049] The second pressing plate 2 is fixed, and the third pressing plate 3 is fixed in the same way, so that the first pressing plate 1, the second pressing plate 2 and the third pressing plate 3 are all kept in a fixed position; then the first tightening bolt 1-3 is passed through the first threaded hole 1-2, so that the first tightening bolt 1-3 presses the front side of the rocker box cover of the diesel locomotive, and the second tightening bolt 2-6 is passed through the third threaded hole 2-4, so that the second tightening bolt 2-6 presses the side wall of the rocker box cover of the diesel locomotive, and the third pressing plate 3 is also tightened to the side wall of the rocker box cover of the diesel locomotive by the second tightening bolt 2-6, so that the position of the rocker box cover of the diesel locomotive is fixed, which solves the problem of time-consuming fixation of the rocker box cover of the diesel locomotive after it is loose or falls off.

[0050] The above is only a preferred embodiment of the present invention and does not constitute any limitation to the present invention. Any simple modification, change and equivalent structural transformation made to the above embodiments according to the technical essence of the present invention shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A rocker box cover fastening device for a diesel locomotive, characterized in that: The invention comprises a first pressing plate (1), a second pressing plate (2) and a third pressing plate (3), wherein the ends of the second pressing plate (2) and the third pressing plate (3) along the length direction are respectively connected to the left and right ends of the first pressing plate (1), and the first pressing plate (1) comprises a first pressing plate body (1-1), a first threaded hole (1-2), a first tightening bolt (1-3) and a first rubber pad (1-4). The first rubber pad (1-4) is arranged on one side of the first pressing plate body (1-1) close to the rocker box cover of the internal combustion engine vehicle and on the end of the first tightening bolt (1-3). The first threaded hole (1-2) is arranged in the middle of the first pressing plate body (1-1), and the first threaded hole (1-2) passes through the first pressing plate body (1-1) and the first rubber pad (1-4). The external thread of the first tightening bolt (1-3) matches the internal thread of the first threaded hole (1-2).

2. A rocker box cover fastening device for a diesel locomotive according to claim 1, characterized in that: First auxiliary extension plates (1-5) are respectively arranged at the left and right ends of the first pressing plate body (1-1); the first auxiliary extension plates (1-5) are arranged at the first pressing plate body (1-1); and the first auxiliary extension plates (1-5) can move along the extension direction of the first pressing plate body (1-1).

3. A rocker box cover fastening device for a diesel locomotive according to claim 1, characterized in that: The second press-fit plate (2) has the same structure as the third press-fit plate (3). The second press-fit plate (2) comprises a second press-fit plate body (2-1), a second threaded hole (2-2) and a second fastening bolt (2-3). The second press-fit plate body (2-1) is an L-shaped structure. The vertical end of the second press-fit plate body (2-1) is connected to the end of the first press-fit plate body (1-1) along the length direction. The second threaded hole (2-2) is arranged at the lateral end of the second press-fit plate body (2-1). The external thread of the second fastening bolt (2-3) matches the internal thread of the second threaded hole (2-2).

4. A rocker box cover fastening device for a diesel locomotive according to claim 3, characterized in that: The second pressing plate (2) also includes a third threaded hole (2-4), a second rubber pad (2-5) and a second tightening bolt (2-6); the second rubber pad (2-5) is arranged at the vertical end of the second pressing plate body (2-1) and the threaded end of the second tightening bolt (2-6); the third threaded hole (2-4) passes through the vertical end of the second pressing plate body (2-1) and the second rubber pad (2-5); the third threaded hole (2-4) is located in the middle of the vertical end of the second pressing plate body (2-1); and the second tightening bolt (2-6) is arranged in the third threaded hole (2-4).

5. A rocker box cover fastening device for a diesel locomotive according to claim 4, characterized in that: A second auxiliary extension plate (2-7) is provided at the end of the vertical end of the second pressing plate body (2-1) away from the lateral end. The second auxiliary extension plate (2-7) is provided on the second pressing plate body (2-1). The second auxiliary extension plate (2-7) can extend or shrink along the extension direction of the vertical end of the second pressing plate body (2-1).

6. A rocker box cover fastening device for a diesel locomotive according to claim 3, characterized in that: The connection between the second pressing plate body (2-1) and the first pressing plate body (1-1) is arranged as an arc-shaped structure.

7. A rocker box cover fastening device for a diesel locomotive according to claim 1, characterized in that: The first pressing plate (1), the second pressing plate (2) and the third pressing plate (3) are all made of steel plates, and the steel plates are 60 mm wide and 5 mm thick.

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