CN221938318U - Cab tilting mechanism and vehicle - Google Patents

Abstract

The utility model discloses a cab turnover mechanism and a vehicle. The cab turnover mechanism comprises a pipe body, a torsion bar and two connecting arms, wherein the pipe body comprises a beam pipe and spline pipes arranged on two axial sides of the beam pipe, and the beam pipe and the spline pipes are welded and connected to form a first welding part; the torsion bar is arranged on the pipe body in a penetrating way, is connected with the spline pipe through the spline and is connected with the car body; the two connecting arms are arranged at intervals along the axial direction of the pipe body, the connecting arms are connected with the pipe body in a welding mode to form a second welding portion, the two connecting arms are used for being connected with the cab, and the first welding portion is located on one side of the connecting arms in the axial direction. The cab turnover mechanism is more reasonable in structural design and longer in service life.

Description

Cab flipping mechanism and vehicle

Technical Field

The utility model relates to the technical field of vehicle parts, in particular to a cab flipping mechanism and a vehicle.

Background Art

At present, truck bodies generally adopt a cab forward flip structure, which is convenient for repair and maintenance during use. A flip mechanism is installed at the front of the cab to support the weight of the cab and provide flip torque, and a locking mechanism is installed at the rear end. When repair and maintenance are required, the locking mechanism at the rear end can be opened to lock the cab when it flips forward to a certain angle, which is convenient for engine failure repair and daily maintenance.

There are two common types of flipping mechanisms: single torsion bar flipping mechanism and double torsion bar flipping mechanism. The double torsion bar flipping mechanism can be further divided into ordinary double torsion bar and coaxial double torsion bar. Compared with the single torsion bar flipping, the coaxial double torsion bar flipping has the same force on the left and right supporting arms, so there is no cab deflection problem after installation. The left and right flip supports are evenly stressed and the service life is extended. Compared with the ordinary double torsion bar flipping, the rocker arm structure is cancelled, and the weight of the vehicle body is directly pressed on the flip shaft. There is no torsion bar torque causing the cab to move up and down, which can solve the problem of vibration and abnormal noise.

However, the coaxial double torsion bar flipping mechanism in the related art still has the problem of unreasonable structural design and still needs further improvement.

Utility Model Content

The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a cab turning mechanism, the cab turning mechanism has a more reasonable structural design and a longer service life.

The utility model also aims to provide a vehicle to which the above-mentioned cab flipping mechanism is applied.

The cab flipping mechanism according to the embodiment of the utility model comprises:

A tube body, the tube body comprising a cross beam tube and spline tubes arranged on both axial sides of the cross beam tube, the cross beam tube and the spline tube are welded to form a first welding portion;

A torsion bar, the torsion bar is passed through the tube body, the torsion bar is spline-connected to the spline tube, and the torsion bar is connected to the vehicle body;

Two connecting arms are arranged axially spaced apart from each other along the tube body, the connecting arms are welded to the tube body to form a second welding portion, the two connecting arms are used to connect to the cab, and the first welding portion is located on one side of the connecting arm in the axial direction.

According to the cab flipping mechanism of the embodiment of the utility model, during use, when flipping the cab, the cab will drive the pipe body to rotate together through the connecting arm, and the spline tube of the pipe body is spline-connected to the torsion bar, so the pipe body will drive the torsion bar to twist and accumulate torque, and when the cab flips back, the accumulated torque can provide a flipping force for the cab to help the cab reset. At the same time, the utility model arranges the first welding part on one side of the connecting arm in the axial direction, so that the first welding part can be as far away from the second welding part as possible, and the mutual influence of the welding deformation generated when the first welding part and the second welding part are formed can be as small as possible, so as to reduce the risk of stress concentration at the second welding part and stress corrosion cracking caused by long-term use. Therefore, the structural design of the cab flipping mechanism of the utility model is more reasonable, the service life is longer, and it is not easy to be damaged.

According to some embodiments of the present invention, the distance between the first welding portion and the second welding portion which is closest to the first welding portion is greater than 50 mm.

According to some embodiments of the present invention, the distance between the first welding portion and the second welding portion which is closest to the first welding portion is greater than half of the axial dimension of the connecting arm of the tube body.

According to some embodiments of the present invention, the second welding portion is arranged around the tube body.

According to some embodiments of the present invention, the two first welding portions are respectively arranged on sides of the two connecting arms that are away from each other.

According to some embodiments of the utility model, an end portion of one of the crossbeam tube and the spline tube is provided with a plug-in portion, and an outer peripheral surface of one end of the other of the crossbeam tube and the spline tube is provided with a plug-in groove, the plug-in portion and the plug-in groove are adapted to be plug-in, and the plug-in portion and the end face of the plug-in groove are welded to each other to form the first welding portion.

According to some embodiments of the present utility model, the plug-in portion is an annular plug-in portion, and the plug-in groove is an annular plug-in groove.

According to some embodiments of the present invention, the angle between the axial end face of the plug-in portion and the central axis of the tube body is less than 90 degrees; the angle between the axial end face of the plug-in slot and the central axis of the plug-in slot is less than 90 degrees.

According to some embodiments of the present utility model, the plug-in portion is provided with a plug welding hole penetrating through the inner surface and the outer surface of the plug-in portion.

According to some embodiments of the present invention, a plurality of the plug welding holes are symmetrically arranged about the central axis of the plug-in portion.

The vehicle according to the embodiment of the utility model comprises the cab flipping mechanism described above.

The vehicle according to the embodiment of the utility model has at least the following advantages because it includes the above-mentioned cab flipping mechanism: fewer maintenance and replacement times, longer service life, and better use effect.

Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

FIG1 is a schematic structural diagram of a cab flipping mechanism according to an embodiment of the utility model;

FIG2 is a partial cross-sectional view of a tube body in a cab flipping mechanism according to an embodiment of the present utility model;

3 is a partial cross-sectional view of a cross beam tube in a cab flipping mechanism according to an embodiment of the present utility model;

4 is a cross-sectional view of a spline tube in the cab flipping mechanism according to an embodiment of the present utility model.

Reference numerals:

Cab flipping mechanism 100;

Tube body 10;

Beam tube 101; spline tube 102; first welding portion 103;

Connecting arm 20;

Second welding portion 201; first connecting plate 202; second connecting plate 203; connecting member 204;

Insertion portion 30; insertion groove 40; plug welding hole 50.

DETAILED DESCRIPTION

The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

In the description of the present invention, it should be understood that the terms "center", "length", "width", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

In addition, features defined as “first” or “second” may explicitly or implicitly include one or more such features, and are used to distinguish and describe features, without any distinction in order or importance.

In the description of the present invention, unless otherwise specified, “plurality” means two or more.

In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

1 to 4 , a cab flipping mechanism 100 according to an embodiment of the present utility model is described below.

As shown in Figure 1, the cab flipping mechanism 100 according to the embodiment of the utility model includes a tube body 10, a torsion bar and two connecting arms 20. The tube body 10 includes a crossbeam tube 101 and a spline tube 102 arranged on both sides of the axial direction of the crossbeam tube 101. The crossbeam tube 101 and the spline tube 102 are welded to form a first welding portion 103; the torsion bar passes through the tube body 10, the torsion bar is spline-connected to the spline tube 102, and the torsion bar is connected to the vehicle body; the two connecting arms 20 are arranged axially spaced apart from each other along the tube body 10, and the connecting arms 20 are welded to the tube body 10 to form a second welding portion 201. The two connecting arms 20 are used to connect to the cab, and the first welding portion 103 is located on one side of the connecting arm 20 in the axial direction.

Specifically, the crossbeam tube 101 and the spline tube 102 are welded to form a first welding portion 103, which refers to the welding connection between the axial end face of the crossbeam tube 101 and the axial end face of the spline tube 102. The welded portion between the crossbeam tube 101 and the spline tube 102 forms the first welding portion 103. The first welding portion 103 can be a weld, or a portion with welding marks.

The torsion bar is passed through the tube body 10, specifically, the torsion bar is passed through the cross beam tube 101 and the spline tube 102 arranged on both sides of the cross beam tube 101. The torsion bar is spline-connected with the spline tube 102, and the torsion bar is connected to the vehicle body. Here, the portion of the torsion bar corresponding to the middle of the tube body 10 is connected to the vehicle body, and the portion of the torsion bar at the end of the tube body 10 is spline-connected with the spline tube 102, so that the portion of the torsion bar connected to the spline tube 102 will rotate synchronously with the spline tube 102, and the torsion bar is fixed to the vehicle body, so that when the spline tube 102 rotates, the torsion bar can be driven to twist. Since the spline connection is more uniformly stressed, and the grooves on the spline are generally shallow, the stress concentration at the root of the tooth is smaller, and the strength is less weakened; the spline is mainly contacted through multiple teeth, and the total contact area is larger, so it can withstand a larger load, which is conducive to the transmission of torque. The inner wall of a spline tube 102 can be set to connect to the torsion bar at multiple locations.

Specifically, the connecting arm 20 can be a connecting plate, a connecting rod, a connecting frame, etc., which are not specifically limited here. The connecting arm 20 is welded to the tube body 10 to form a second welding portion 201. For example, the connecting arm 20 can be welded to the circumferential side wall of the tube body 10, and the portion where the connecting arm 20 is welded to the tube body 10 forms the second welding portion 201. For example, the second welding portion 201 can be a weld or a portion with welding marks. The two connecting arms 20 are used to connect with the cab, that is, when the cab rotates relative to the vehicle body, the connecting arm 20 will be driven to rotate synchronously, so that the connecting arm 20 will drive the tube body 10 to rotate.

For trucks, the engine is generally arranged at the bottom of the cab. When the vehicle is repaired, the cab needs to be turned over to repair and maintain the engine. Since the cab of the truck is heavy, the cab needs to be turned over with the help of a torsion bar flipping mechanism.

The working process of the cab flipping mechanism 100 of the embodiment of the utility model is as follows: when flipping the cab, the cab will drive the tube body 10 to rotate together through the connecting arm 20. The spline tube 102 of the tube body 10 is spline-connected to the torsion bar, so the tube body 10 will drive the torsion bar to twist and accumulate torque. When the cab flips back, the above-mentioned accumulated torque can provide a flipping force for the cab to help the cab reset.

In some related technologies, the first welding portion is formed at the portion where the tube body is connected to the connecting arm, and the distance between the first welding portion and the second welding portion is too close. Stress concentration is prone to occur at the portion where the tube body is connected to the connecting arm, which may cause stress corrosion cracking of the second welding portion during the use of the cab flip mechanism.

The first welding portion 103 is located on one side of the connecting arm 20 in the axial direction. Here, the two first welding portions 103 can be respectively arranged on the sides of the two connecting arms 20 that are away from each other, or the two first welding portions 103 can also be respectively arranged on the sides of the two connecting arms 20 that are close to each other, or one of the two first welding portions 103 is arranged on the side of one connecting arm 20 away from the other connecting arm 20, and the other of the two first welding portions 103 is arranged on the side of one connecting arm 20 close to the other connecting arm 20. In the embodiment of the utility model, by arranging the first welding portion 103 on one side of the connecting arm 20 in the axial direction, the arrangement position of the first welding portion 103 is more flexible, and the first welding portion 103 can be as far away from the connecting arm 20 as possible, thereby reducing the mutual influence of the welding deformation of the first welding portion 103 and the second welding portion 201, and reducing the risk of stress concentration in the second welding portion 201, cracks or corrosion cracks due to long-term use.

According to the cab flipping mechanism 100 of the embodiment of the utility model, during use, when flipping the cab, the cab will drive the pipe body 10 to rotate together through the connecting arm 20, and the spline pipe 102 of the pipe body 10 is spline-connected with the torsion bar, so the pipe body 10 will drive the torsion bar to twist and accumulate torque. When the cab flips back, the accumulated torque can provide a flipping force for the cab to help the cab reset. At the same time, the utility model arranges the first welding part 103 on one side of the connecting arm 20 in the axial direction, so that the first welding part 103 can be as far away from the second welding part 201 as possible, and the mutual influence of the welding deformation generated when the first welding part 103 and the second welding part 201 are formed can be as small as possible, so that the risk of stress concentration at the second welding part 201 and stress corrosion cracking caused by long-term use can be reduced. Therefore, the structural design of the cab flipping mechanism 100 of the utility model is more reasonable, the service life is longer, and it is not easy to be damaged.

According to some embodiments of the present invention, the spacing between the first welding portion 103 and the nearest second welding portion 201 is greater than 50 mm. For example, the spacing between the first welding portion 103 and the nearest second welding portion 201 can be 60 mm, 70 mm, 80 mm, etc. In this way, the mutual influence of the welding deformation generated when the first welding portion 103 and the second welding portion 201 are formed is small, and the risk of stress concentration and stress corrosion cracking in the second welding portion 201 during long-term use is low. The structural design of the cab flip mechanism 100 of the present invention is more reasonable, the service life is longer, and it is not easy to be damaged.

More specifically, as shown in Figure 1, each connecting arm 20 includes a first connecting plate 202 and a second connecting plate 203 arranged at intervals along the axial direction of the tube body 10, and a connecting piece 204 is provided between the first connecting plate 202 and the second connecting plate 203. The first connecting plate 202 and the second connecting plate 203 are connected to each other through the connecting piece 204. The first connecting plate 202 and the second connecting plate 203 are both welded to the tube body 10 to form a second welding portion 201. That is, two second welding portions 201 are formed between each connecting arm 20 and the tube body 10.

According to some embodiments of the present invention, as shown in FIG1 , the spacing between the first welding portion 103 and the nearest second welding portion 201 is greater than half of the axial dimension of the connecting arm 20 in the pipe body 10. In the related art, two second welding portions 201 are formed between one connecting arm 20 and the pipe body 10, and the first welding portion 103 is located between the two second welding portions 201. In order to ensure that the spacing between the first welding portion 103 and the two second welding portions 201 is large enough, the first welding portion 103 is usually located in the middle of the two second welding portions 201. In the embodiment of the present application, the spacing between the first welding portion 103 and the nearest second welding portion 201 is greater than half of the axial dimension of the connecting arm 20 in the pipe body 10, that is, in the embodiment of the present application, the spacing between the first welding portion 103 and the nearest second welding portion 201 is greater than the spacing between the second welding portion and the first welding portion in the related art. In this way, the risk of stress concentration and stress corrosion cracking at the second welding portion 201 in the embodiment of the present invention is lower.

According to some embodiments of the present invention, the second welding portion 201 is arranged around the tube body 10, that is, the second welding portion 201 is in a circular ring shape. In this way, the connection area between the connecting arm 20 and the tube body 10 is large, the connecting arm 20 and the tube body 10 are not easy to separate, and the connection strength is also better.

In some optional embodiments, the second welding portion 201 may also be arc-shaped.

According to some embodiments of the utility model, as shown in FIG1 , the two first welding portions 103 are respectively arranged on the sides away from each other of the two connecting arms 20. That is to say, the size of the spline tube 102 in the axial direction is shorter. It should be noted that the crossbeam tube 101 is a finished tube with a lower cost, while the spline tube 102 requires additional processing. For example, after the spline part of the spline tube 102 is processed, the circumferential surface of the spline tube 102 needs to undergo additional machining and other processes, and the processing cost is relatively high. Therefore, by shortening the spline tube 102 and lengthening the crossbeam tube 101, it is beneficial to reduce the cost of the entire tube body 10, thereby helping to reduce the production cost of the cab flip mechanism 100.

According to some embodiments of the utility model, as shown in FIG. 2 and FIG. 3 , one end of one of the cross beam tube 101 and the spline tube 102 is provided with a plug-in portion 30, and the outer peripheral surface of one end of the other of the cross beam tube 101 and the spline tube 102 is provided with a plug-in groove 40, and the plug-in portion 30 and the plug-in groove 40 are adapted to be plugged, and the end faces of the plug-in portion 30 and the plug-in groove 40 are welded to each other to form a first welding portion 103. It can be understood that when welding, the plug-in portion 30 is first plugged into the plug-in groove 40, and then the end faces of the plug-in portion 30 and the plug-in groove 40 are welded. By providing the plug-in portion 30 and the plug-in groove 40, the plug-in portion 30 and the plug-in groove 40 can support and position each other before welding, so it is helpful to reduce the welding difficulty when welding between the cross beam tube 101 and the spline tube 102, and improve the welding fusion area.

According to some embodiments of the present invention, as shown in Figures 2 and 3, the plug-in portion 30 is an annular plug-in portion, and the plug-in slot 40 is an annular plug-in slot. In this way, the support and positioning stability between the plug-in portion 30 and the plug-in slot 40 are better, and processing is also convenient.

In some optional embodiments, a plurality of plug-in portions 30 are circumferentially spaced apart at one end of one of the crossbeam tube 101 and the spline tube 102, a plurality of plug-in grooves 40 are circumferentially spaced apart at one end outer circumferential surface of the other of the crossbeam tube 101 and the spline tube 102, the axial end face of the crossbeam tube 101 and the axial end face of the spline tube 102 are welded to each other, and the plug-in portion 30 and the end face of the plug-in groove 40 are welded to each other to form a first welding portion 103 (not shown in the figure).

According to some embodiments of the present invention, as shown in Fig. 3, the plug-in portion 30 is provided with a plug welding hole 50 that penetrates the inner surface and the outer surface of the plug-in portion 30. During welding, the welding rod can be inserted into the plug welding hole 50 for fusion welding. By providing the plug welding hole 50, it is beneficial to improve the welding connection strength between the cross beam tube 101 and the spline tube 102 and reduce the risk of fracture.

In some embodiments, a plug welding hole 50 is provided on the circumferential outer surface of the plug slot 40 , and the plug welding holes 50 on the circumferential outer surface of the plug portion 30 correspond one-to-one with the plug welding holes 50 of the plug slot 40 and are connected to each other.

According to some embodiments of the present invention, a plurality of plug welding holes 50 are symmetrically arranged about the central axis of the plug connection portion 30. It should be noted that welding may cause local deformation of the welded portion, and by arranging a plurality of plug welding holes 50 symmetrically along the central axis of the plug connection portion 30, some welding stress can be offset and the influence of welding deformation can be reduced.

In a specific embodiment, two plug welding holes 50 are symmetrically provided about the central axis of the plug-in portion 30. In this way, on the one hand, the welding strength can be improved; on the other hand, the welding deformation is small.

In some embodiments, the cross beam tube 101 is provided with an opening, and the torsion bar can be connected to the vehicle body via a connecting bracket passing through the opening (not shown in the figure).

In some embodiments, the cab flipping mechanism 100 further includes a support frame, the tube body 10 is rotatably supported on the support frame, the support frame is mounted on the vehicle body, and the support frame is used to support the tube body 10, which is beneficial to improve the supporting strength of the tube body 10 (not shown in the figure).

In some embodiments, the cross beam tube 101 and the spline tube 102 are welded by argon arc welding, which has a better welding effect. In other words, the first welding portion 103 is a welding portion formed by welding by argon arc welding.

In some embodiments, as shown in FIG. 2 and FIG. 3 , the angle α between the end surface of the plug-in portion 30 in the axial direction and the central axis of the tube body 10 is less than 90 degrees, for example, the angle α may be 60 degrees, 59 degrees, 58 degrees, 57 degrees, 61 degrees, 62 degrees, 63 degrees, etc. In this way, the welding connection area between the beam tube 101 and the spline tube 102 is larger, which is conducive to improving the welding stability.

In some embodiments, as shown in FIG. 2 and FIG. 4 , the angle β between the end face of the plug slot 40 in the axial direction and the central axis of the plug slot 40 is less than 90 degrees. For example, the angle β may be 60 degrees, 59 degrees, 58 degrees, 57 degrees, 61 degrees, 62 degrees, 63 degrees, etc. In this way, the welding connection area between the crossbeam tube 101 and the spline tube 102 is larger, which is conducive to improving the welding stability. The angle β between the end face of the plug slot 40 in the axial direction and the central axis of the plug slot 40 and the angle α between the end face of the plug-in portion 30 in the axial direction and the central axis of the tube body 10 may be equal or unequal.

The second aspect of the utility model also provides a vehicle.

The vehicle according to the embodiment of the utility model comprises the cab flipping mechanism 100 according to the embodiment of the first aspect of the utility model.

The vehicle according to the embodiment of the utility model is provided with the cab flipping mechanism 100 of the first embodiment of the utility model, and therefore is not prone to damage, has a low number of repair and replacement times, and has a low maintenance cost.

In the description of this specification, the description with reference to the terms "some embodiments", "further" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims (10)

1.A cab tilting mechanism, comprising:

the pipe body (10), the pipe body (10) comprises a beam pipe (101) and spline pipes (102) arranged on two axial sides of the beam pipe (101), and the beam pipe (101) and the spline pipes (102) are welded and connected to form a first welding part (103);

the torsion bar is arranged on the pipe body (10) in a penetrating mode, is connected with the spline pipe (102) in a spline mode, and is connected with the vehicle body;

the two connecting arms (20), two connecting arms (20) are arranged at intervals along the axial direction of the pipe body (10), the connecting arms (20) are welded with the pipe body (10) to form a second welding part (201), the two connecting arms (20) are used for being connected with a cab, and the first welding part (103) is located on one side of the connecting arms (20) in the axial direction.

2. The cab tilting mechanism according to claim 1, characterized in that the distance between the first weld (103) and the second weld (201) closest thereto is greater than 50mm; and/or the distance between the first welding part (103) and the nearest second welding part (201) is greater than one half of the dimension of the connecting arm (20) in the axial direction of the pipe body (10).

3. Cab tilting mechanism according to claim 1, characterized in that the second weld (201) is arranged around the tube body (10).

4. Cab tilting mechanism according to claim 1, characterized in that the two first welding parts (103) are provided on the sides of the two connecting arms (20) facing away from each other, respectively.

5. The cab tilting mechanism according to any one of claims 1 to 4, wherein an end portion of one of the cross beam tube (101) and the spline tube (102) is provided with a socket portion (30), an outer peripheral surface of one end of the other of the cross beam tube (101) and the spline tube (102) is provided with a socket groove (40), the socket portion (30) and the socket groove (40) are adapted to be socket-connected, and the socket portion (30) and an end surface of the socket groove (40) are welded to each other to form the first welded portion (103).

6. The cab tilting mechanism according to claim 5, characterized in that the plug-in part (30) is an annular plug-in part and the plug-in groove (40) is an annular plug-in groove.

7. Cab tilting mechanism according to claim 5, characterized in that the angle (α) between the end face of the plug-in part (30) in the axial direction and the central axis of the tube body (10) is less than 90 degrees; an included angle (beta) between the end surface of the inserting groove (40) in the axial direction and the central axis of the inserting groove (40) is smaller than 90 degrees.

8. The cab tilting mechanism according to claim 5, wherein the plug portion (30) is provided with plug welding holes (50) penetrating through an inner surface and an outer surface of the plug portion (30).

9. The cab tilting mechanism according to claim 8, wherein the plug welding holes (50) are provided in plurality symmetrically with respect to a central axis of the plug portion (30).

10. A vehicle characterized by comprising a cab tilting mechanism (100) according to any one of claims 1-9.