JP7018149B2 - Mixer truck - Google Patents

Description

The present invention relates to a mixer truck.

Patent Document 1 discloses a mixer truck that rotatably supports a mixer drum by a front support frame and a rear support frame provided on a vehicle body frame.

Japanese Unexamined Patent Publication No. 2004-9777

In the mixer truck described in Patent Document 1, the mixer drum is supported by a front support frame and a rear support frame, and the weight of the mixer drum and the ready-mixed concrete put into the mixer drum is transferred through the front support frame and the rear support frame. Acts on the body frame. Since the vehicle body frame is generally a long structure extending in the front-rear direction of the vehicle, when the weight of the mixer drum acts on the vehicle body frame as described above, the portion between the front support frame and the rear support frame, In particular, distortion occurs in the portion that supports the axle, and stress is concentrated in this portion. When such stress concentration occurs, the vehicle body frame may be plastically deformed or the joints between the members constituting the vehicle body frame may be damaged.

The present invention has been made in view of the above problems, and an object of the present invention is to suppress deformation of the body frame of a mixer truck.

The present invention is a mixer truck provided with a mixer drum rotatably mounted on the vehicle, which includes a vehicle body frame extending in the front-rear direction of the vehicle, a front support frame provided on the vehicle body frame to support the front of the mixer drum, and a vehicle body. A rear support frame provided on the frame and supporting the rear of the mixer drum and a reinforcing frame arranged between the front support frame and the rear support frame along the vehicle body frame are provided, and the reinforcement frame is provided via a fastening member. It has a main body portion that is fastened to the front support frame and the rear support frame and is arranged along the vehicle body frame, and a flange portion that is provided at the end of the main body portion and has a through hole through which the fastening member is inserted. The through hole is characterized in that it is formed parallel to the direction in which the vehicle body frame extends.

In the present invention, a reinforcing frame is provided between the front support frame and the rear support frame along the vehicle body frame. Therefore, the rigidity of the vehicle body frame between the front support frame and the rear support frame is improved by the reinforcing frame, and the reinforcing frame is provided along the vehicle body frame, so that the vehicle body frame may be deformed or distorted. It is suppressed. Further, in the first invention, the reinforcing frame is easily attached to the front support frame and the rear support frame via the fastening member. Since welding work or the like is not required to connect the frames to each other in this way, it is possible to suppress an increase in the manufacturing cost of the mixer truck even when the reinforcing frame is provided. Further, in the first invention, the reinforcing frame is connected to the front support frame and the rear support frame by a fastening member inserted into a through hole formed in parallel with the direction in which the vehicle body frame extends. That is, the reinforcing frame is coupled to the front support frame and the rear support frame via the fastening member so as to counter the tensile load acting on the vehicle body frame in the front-rear direction of the vehicle. As a result, it is possible to prevent the vehicle body frame from being deformed or the like due to the tensile load between the front support frame and the rear support frame.

Further, the present invention is a mixer truck provided with a mixer drum rotatably mounted on the vehicle, which includes a vehicle body frame extending in the front-rear direction of the vehicle and a front support frame provided on the vehicle body frame to support the front of the mixer drum. A rear support frame provided on the vehicle body frame to support the rear of the mixer drum and a reinforcing frame arranged between the front support frame and the rear support frame along the vehicle body frame are provided, and the reinforcement frame is front-supported. A main body portion that is integrally formed with either one of the frame and the rear support frame, is fastened to either the front support frame or the rear support frame via a fastening member, and is arranged along the vehicle body frame, and the main body portion. It has a flange portion provided at an end portion of the above and through which a through hole through which a fastening member is inserted is formed, and the through hole is formed in parallel with the direction in which the vehicle body frame extends.

In the present invention, a reinforcing frame is provided between the front support frame and the rear support frame along the vehicle body frame. Therefore, the rigidity of the vehicle body frame between the front support frame and the rear support frame is improved by the reinforcing frame, and the reinforcing frame is provided along the vehicle body frame, so that the vehicle body frame may be deformed or distorted. It is suppressed. Further, in the second invention, the number of parts is reduced by integrally forming the reinforcing frame with the front support frame or the rear support frame. Further, the reinforcing frame is easily attached to the front support frame or the rear support frame via the fastening member. Even when the reinforcing frame is provided in this way, the number of parts is reduced and welding work or the like is not required to connect the frames to each other, so that it is possible to suppress an increase in the manufacturing cost of the mixer truck. .. Further, in the second invention, the reinforcing frame is connected to the front support frame and the rear support frame by a fastening member inserted into a through hole formed in parallel with the direction in which the vehicle body frame extends. That is, the reinforcing frame is coupled to the front support frame and the rear support frame via the fastening member so as to counter the tensile load acting on the vehicle body frame in the front-rear direction of the vehicle. As a result, it is possible to prevent the vehicle body frame from being deformed or the like due to the tensile load between the front support frame and the rear support frame.

Further, the present invention is characterized in that the flange portion has a thickness equal to or larger than the plate thickness of the main body portion.

In the present invention, the plate thickness of the flange portion is set to be equal to or larger than the plate thickness of the main body portion. By improving the rigidity of the flange portion in this way, the reinforcing frame is integrally coupled with the front support frame and the rear support frame. As a result, the load acting on the vehicle body frame is made uniform, and it is possible to prevent the vehicle body frame from being deformed or the like.

Further, the present invention is characterized in that the reinforcing frame has a plate thickness equal to or less than the plate thickness of the vehicle body frame.

In the present invention, the plate thickness of the reinforcing frame has a thickness equal to or less than the plate thickness of the vehicle body frame. In this way, the weight of the reinforcing frame is reduced by reducing the plate thickness of the reinforcing frame. As a result, it is possible to suppress the reduction of the load capacity while improving the strength of the vehicle body frame by the reinforcing frame.

Further, in the present invention, the flange portion is arranged at a position where the lower surface of the flange portion is flush with the lower surface of the main body portion, or the lower surface of the flange portion is located at a position farther from the upper surface of the vehicle body frame than the lower surface of the main body portion. It is characterized by that.

In the present invention, the lower surface of the main body and the upper surface of the vehicle body frame are in surface contact with each other. Therefore, the surface pressure is reduced and the load acting on the vehicle body frame is made uniform. As a result, it is possible to prevent the vehicle body frame from being distorted.

Further, the present invention is characterized in that through holes are provided in a portion of the flange portion above the main body portion and a portion on the side thereof.

In the present invention, a through hole through which the tightening member is inserted is provided in a portion of the flange portion above the main body portion and a portion on the side thereof. Therefore, when the reinforcing frame is connected to the front support frame and the rear support frame, the tightening work of the tightening member can be easily performed.

Further, the present invention is characterized in that the flange portion has a notch portion.

In the present invention, a notch is formed in the flange portion. By providing the notch in the flange portion in this way, the weight of the flange portion can be reduced and the weight of the reinforcing frame can be reduced.

Further, the present invention is characterized in that the fastening member is a bolt and is inserted into the through hole from the rear side of the vehicle.

In the present invention, the bolt is inserted into the through hole from the rear side of the vehicle. Therefore, the head of the bolt is located on the rear side of the vehicle, and it is possible to prevent the head of the bolt from being damaged by flying stones or the like while the vehicle is running.

Further, the present invention is characterized in that the reinforcing frame is formed of a hollow pipe material.

In the present invention, the reinforcing frame is formed of a pipe material having a relatively high moment of inertia of area. By increasing the moment of inertia of area of the reinforcing frame arranged along the vehicle body frame and improving the rigidity in this way, the rigidity between the front support frame and the rear support frame is improved. As a result, it is possible to prevent the vehicle body frame from being deformed between the front support frame and the rear support frame. Further, since the reinforcing frame is hollow, it is possible to suppress an increase in the weight of the mixer truck even when the reinforcing frame is provided.

Further, the present invention is further provided with a pressing member that presses the reinforcing frame against the vehicle body frame.

In the present invention, the reinforcing frame is pressed and fixed to the vehicle body frame by the pressing member. That is, since the reinforcing frame has a structure integrated with the vehicle body frame, the rigidity of the vehicle body frame between the front support frame and the rear support frame is improved. As a result, it is possible to prevent the vehicle body frame from being deformed between the front support frame and the rear support frame.

According to the present invention, it is possible to suppress deformation and the like of the body frame of the mixer truck.

It is a side view of the mixer truck which concerns on 1st Embodiment of this invention. It is an enlarged view of the connection structure shown by the part II of FIG. It is sectional drawing of the flange along the line III-III of FIG. It is sectional drawing of the reinforcement frame along the IV-IV line of FIG. It is a side view of the mixer truck which concerns on 2nd Embodiment of this invention. It is an enlarged view of the connection structure shown by the VI part of FIG. It is sectional drawing of the connection structure along the line VII-VII of FIG.

Hereinafter, the mixer truck according to the embodiment of the present invention will be described with reference to the drawings.

<First Embodiment>
First, the mixer truck 100 according to the first embodiment will be described with reference to FIGS. 1 to 4. The mixer truck 100 shown in FIG. 1 is a vehicle that transports ready-mixed concrete (hereinafter referred to as “ready-mixed concrete”) put into the mixer drum 10 in a concrete plant. In the following description, the mixer truck 100 will describe a case where ready-mixed concrete is loaded as a load.

The mixer truck 100 includes a mixer drum 10 for loading ready-mixed concrete, a drive device 12 for rotationally driving the mixer drum 10, a hopper 14 for supplying ready-mixed concrete to the mixer drum 10, and a chute 16 for guiding the ready-mixed concrete discharged from the mixer drum 10 to a predetermined position. A vehicle body frame 20 extending in the front-rear direction of the vehicle, a front support frame 30 provided on the vehicle body frame 20 to support the front of the mixer drum 10, and a rear support frame provided on the vehicle body frame 20 to support the rear of the mixer drum 10. 40 is provided with a reinforcing frame 50 arranged between the front support frame 30 and the rear support frame 40 along the vehicle body frame 20 to reinforce the vehicle body frame 20.

The mixer drum 10 is a cylindrical member whose rear end is formed as an open end, and is rotatably mounted on a vehicle body frame 20.

A drive shaft 10a extending along the rotation axis C1 of the mixer drum 10 is provided at the front end of the mixer drum 10, and an annular roller ring 10b is provided on the outer periphery of the rear portion of the mixer drum 10. The drive shaft 10a of the mixer drum 10 is connected to a hydraulic motor (not shown) provided in the drive device 12 mounted on the front support frame 30 via a gearbox (not shown). The mixer drum 10 is configured to rotate forward or backward by a hydraulic motor.

The rear side of the mixer drum 10 is supported from below by the rear support frame 40 arranged behind the vehicle body frame 20 via the roller ring 10b. The front side of the mixer drum 10 is supported from below by the front support frame 30 arranged in front of the vehicle body frame 20 via the drive device 12. The mixer drum 10 is arranged on the vehicle body frame 20 in a front-down posture in which the rear side is lifted upward from the front side.

Inside the mixer drum 10, drum blades (not shown) are spirally arranged along the inner wall surface of the drum. The ready-mixed concrete loaded in the mixer drum 10 is agitated by the drum blade that rotates together with the mixer drum 10.

When the mixer drum 10 rotates in the forward direction, the drum blade moves the ready-mixed concrete in the mixer drum 10 forward while stirring. On the other hand, when the mixer drum 10 rotates in the reverse direction, the drum blade moves the ready-mixed concrete backward while stirring. By rotating the mixer drum 10 in the reverse direction in this way, ready-mixed concrete can be discharged from the open end of the mixer drum 10. The ready-mixed concrete discharged from the mixer drum 10 is guided to a predetermined position via a chute 16 rotatably provided in the lower rear portion of the mixer truck 100.

When the ready-mixed concrete is put into the mixer drum 10 via the hopper 14 provided in the upper rear part of the mixer truck 100, the ready-mixed concrete is rotated forward at a higher speed than during stirring, and the put-in ready-mixed concrete is quickly discharged. Move to the front of the mixer drum 10.

The vehicle body frame 20 has a pair of side rails 21 extending in the front-rear direction of the vehicle and a cross member (not shown) extending in the left-right direction of the vehicle to connect the pair of side rails 21. The vehicle body frame 20 supports an axle 22 having wheels 24 attached to both ends via a suspension or the like (not shown). The mixer truck 100 shown in FIG. 1 is based on a truck having one axle in the front and two axles 22 in the rear. The number of axles of the rear axle 22 is not limited to this, and a truck having one or three or more rear axles may be adopted as the base vehicle.

The front support frame 30 has a base portion 31 arranged along the vehicle body frame 20, and a support portion 33 extending upward from the base portion 31 and supporting the drive device 12. A flange portion 32 is provided on the end surface of the base portion 31 on the rear side of the vehicle. The flange portion 32 is joined to the front flange portion 52 of the reinforcing frame 50 described later.

The front support frame 30 is fixed to the vehicle body frame 20 by pressing the base portion 31 against the vehicle body frame 20 by the pressing member 70. The pressing member 70 includes a U-shaped bolt 72, a fixing plate 74 having two through holes through which the threaded portion of the U-shaped bolt 72 is inserted, and a nut 76 screwed into the threaded portion of the U-shaped bolt 72. , Have. With the base portion 31 and the vehicle body frame 20 surrounded by the U-shaped bolt 72 and the fixing plate 74, the nut 76 is screwed onto the U-shaped bolt 72, so that the base portion 31 becomes the vehicle body frame 20. It is pressed and fixed to. The position where the pressing member 70 is provided and the number of the pressing members 70 are not limited to the form shown in FIG. 1, and are arbitrarily set.

The rear support frame 40 includes a base portion 41 arranged along the vehicle body frame 20, a support portion 43 extending upward from the base portion 41 to support the roller ring 10b of the mixer drum 10, and a support portion 43 to which the hopper 14 and the chute 16 are assembled. , Have. A flange portion 42 is provided on the end surface of the base portion 41 on the front side of the vehicle. The flange portion 42 is joined to the rear flange portion 53 of the reinforcing frame 50 described later.

Similar to the front support frame 30, the rear support frame 40 is also fixed to the vehicle body frame 20 by pressing the base portion 41 against the vehicle body frame 20 by the pressing member 70.

The reinforcing frame 50 is provided on a hollow main body 51 arranged along the vehicle body frame 20, a front flange 52 provided on the front end surface of the main body 51 on the vehicle front side, and an end surface on the vehicle rear side of the main body 51. It has a rear flange portion 53 provided. The front flange portion 52 is joined to the flange portion 32 of the front support frame 30, and the rear flange portion 53 is joined to the flange portion 42 of the rear support frame 40. The joining structure will be described later.

Similar to the front support frame 30, the reinforcing frame 50 is also fixed to the vehicle body frame 20 by pressing the main body 51 against the vehicle body frame 20 by the pressing member 70. As described above, since the vehicle body frame 20 and the reinforcing frame 50 have an integral structure between the front support frame 30 and the rear support frame 40, the rigidity of the vehicle body frame 20 in this portion can be improved.

Next, the coupling structure of the reinforcing frame 50 and the front support frame 30 will be described with reference to FIGS. 2 to 4. FIG. 2 is an enlarged view of the portion shown by the part II of FIG. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. 2, and FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG.

As shown in FIGS. 2 and 3, the front flange portion 52 of the reinforcing frame 50 is a plate-shaped member joined to the end surface of the main body portion 51 by welding or the like. The front flange portion 52 is positioned so that its lower surface 52b is flush with the lower surface 51a of the main body 51, or the lower surface 52b is located away from the lower surface 51a of the main body 51 and away from the upper surface 21a of the side rail 21. It is joined to the main body 51. That is, the front flange portion 52 is formed in the shape of a flange protruding in three directions except the lower part with respect to the main body portion 51. Therefore, the lower surface 51a of the main body 51 and the upper surface 21a of the side rail 21 are in surface contact with each other. Similarly to the reinforcing frame 50, the front support frame 30 and the rear support frame 40 are also in surface contact with the upper surface 21a of the side rail 21.

The front flange portion 52 is provided with a plurality of insertion holes 52a as through holes through which bolts 60 as tightening members are inserted, parallel to the longitudinal direction of the vehicle body frame 20. From the viewpoint of joining strength, it is preferable that the insertion holes 52a are provided on all sides so as to surround the main body 51. However, if the insertion hole 52a is provided between the main body 51 and the side rail 21, it becomes difficult to tighten the bolt 60. Further, the front flange portion 52 is shaped so that the main body portion 51 and the side rail 21 are in surface contact with each other as described above. Therefore, the insertion holes 52a are provided on both sides and above the main body 51. The positions and numbers of the insertion holes 52a are not limited to those shown in FIG. 3, and are appropriately set in consideration of assembleability, joint strength, and the like.

Further, as shown in FIG. 3, the front flange portion 52 is formed with a notch portion 52c in order to avoid interference with the fender 25 assembled to the vehicle in close proximity to the front flange portion 52. The cutout portion 52c is formed by cutting out a part of the outer surface of the front flange portion 52 in an L shape. The shape of the notch 52c is not limited to the above shape, and may be appropriately changed according to the shape of adjacent vehicle parts, and may be, for example, a through hole through which wiring or piping for a mixer truck is inserted. Further, the cutout portion 52c may be a lightening portion such as a hole formed in the front flange portion 52 while avoiding the portion where the insertion hole 52a is provided. By providing the cutout portion 52c in the front flange portion 52 in this way, the weight of the front flange portion 52 can be reduced. Further, by providing the notch portion 52c, it is possible to improve the degree of freedom in arranging the vehicle parts provided in the vicinity of the front flange portion 52.

The plate thickness Ta of the front flange portion 52 is set to be equal to or greater than the plate thickness Tb of the main body portion 51. By improving the rigidity of the front flange portion 52 in this way, it is possible to suppress deformation at the joint portion. Therefore, by connecting the front flange portion 52 and the flange portion 32, the reinforcing frame 50 and the front support frame 30 have an integral structure.

The flange portion 32 of the front support frame 30 has the same shape as the front flange portion 52 of the reinforcing frame 50. The flange portion 32 is provided with a plurality of insertion holes 32a corresponding to the insertion holes 52a of the front flange portion 52.

The bolt 60 is inserted into the insertion hole 52a and the insertion hole 32a from the reinforcing frame 50 side on the rear side of the vehicle, and is screwed with the nut 62 provided on the front support frame 30 side. By tightening the bolt 60 and the nut 62 with a predetermined tightening torque, the reinforcing frame 50 and the front support frame 30 are joined. Here, if the head of the bolt 60 is damaged by a stepping stone or the like while the vehicle is running, it becomes difficult to remove the bolt 60. In the present embodiment, the bolt 60 is inserted into the insertion hole 52a and the insertion hole 32a from the rear side of the vehicle as described above. Therefore, the head of the bolt 60 is located on the rear side of the vehicle, and it is possible to prevent the head of the bolt 60 from being damaged by flying stones or the like while the vehicle is running. The nut 62 may be a welded nut welded and fixed to the flange portion 32. Alternatively, instead of the insertion hole 32a, a female screw hole may be formed in the flange portion 32 and the nut 62 may be abolished.

Since the reinforcing frame 50 is arranged on the left and right side rails 21, if the lengths of the reinforcing frame 50 are different on the left and right, a gap is formed between one flange portion 32 and the front flange portion 52. There is a risk of Therefore, a spacer that fills the gap may be inserted between the flange portion 32 and the front flange portion 52.

As shown in FIG. 4, the main body 51 of the reinforcing frame 50 is formed of a square pipe having four corners having a plate thickness Tb equal to or greater than the plate thickness Tc of the side rail 21. The larger the cross-sectional area of the main body 51, the larger the moment of inertia of area and the higher the rigidity of the reinforcing frame 50. On the other hand, the larger the cross-sectional area, the heavier the weight, and the lower the weight of ready-mixed concrete that can be loaded. Therefore, in consideration of the balance between the weight and the moment of inertia of area, it is preferable that the plate thickness Tb of the main body 51 is equal to or less than the plate thickness Tc of the side rail 21 if sufficient rigidity is ensured. As the plate thickness Tb of the main body 51 is reduced, the weight of the reinforcing frame 50 is reduced. Therefore, the reinforcing frame 50 can improve the strength of the vehicle body frame 20 and suppress the reduction of the load capacity. The main body 51 is not limited to the square pipe, and may be, for example, a circular pipe having a relatively high moment of inertia of area. Further, from the viewpoint of integrating the reinforcing frame 50 and the vehicle body frame 20, it is preferable to have a cross-sectional shape having a flat surface portion in contact with the side rail 21 like a square pipe.

The reinforcing frame 50 and the rear support frame 40 are coupled in the same manner as the reinforcing frame 50 and the front support frame 30. Therefore, the description thereof will be omitted.

In the mixer truck 100 having the above configuration, the mixer drum 10 is supported by the front support frame 30 and the rear support frame 40, and the weight of the ready-mixed concrete put into the mixer drum 10 and the mixer drum 10 is the weight of the front support frame 30 and the rear support frame. It acts on the vehicle body frame 20 via the 40. Since the vehicle body frame 20 is a long structure extending in the front-rear direction of the vehicle, when the weight of the mixer drum 10 acts on the vehicle body frame 20 via the front support frame 30 and the rear support frame 40, the vehicle body frame 20 becomes a front support frame 30. The portion between the rear support frame 40 and the portion that supports the axle 22 is distorted so as to bend upward, and stress is concentrated on this portion. When such stress concentration occurs, the side rail 21 constituting the vehicle body frame 20 may be plastically deformed, or the joint portion of the cross member joined to the side rail 21 by welding or rivet may be damaged. ..

Specifically, the vehicle body frame 20 has a force for supporting the entire vehicle upward from below the vehicle body frame 20 via the axle 22, and a front support frame 30 and a rear support frame mounted on the vehicle body frame 20. A downward force via the 40, mainly the mixer drum 10 and the load of the ready-mixed concrete applied to the mixer drum 10 act. When the vehicle travels on the road surface with a vertical force acting on the vehicle body frame 20 in this way, the vehicle body frame 20 is partially distorted due to vibration or the like received from the road surface. Since the positions of the front support frame 30 and the rear support frame 40 with respect to the position of the axle 22 differ depending on the length of the vehicle, the size of the mixer drum 10 mounted on the vehicle, and the like, the distortion generated in the vehicle body frame 20 also differs. For example, when the rear support frame 40 is arranged behind the axle 22, the vehicle body frame 20 is curved so as to hang down from the axle 22 toward the rear of the vehicle.

On the other hand, in the present embodiment, by arranging the reinforcing frame 50 between the front support frame 30 and the rear support frame 40, it is possible to suppress the distortion of the vehicle body frame 20 as described above. ..

Specifically, the reinforcing frame 50 is arranged along a portion between the front support frame 30 and the rear support frame 40 where the vehicle body frame 20 is likely to be deformed. Therefore, the rigidity of the vehicle body frame 20 in this portion is improved by the reinforcing frame 50, and the reinforcing frame 50 is provided along the vehicle body frame 20 so that the vehicle body frame 20 is less likely to be deformed. For example, even if the force for bending the vehicle body frame 20 acts on the vehicle body frame 20 as described above, the reinforcing frame 50 is contact-arranged along the vehicle body frame 20 so that the vehicle body frame 20 is prevented from bending. Will be done. In this way, the deformation of the vehicle body frame 20 between the front support frame 30 and the rear support frame 40 is suppressed by providing the reinforcing frame 50.

Further, since the reinforcing frame 50 is coupled and arranged between the front support frame 30 and the rear support frame 40, the load of the ready-mixed concrete put into the mixer drum 10 and the mixer drum 10 is the reinforcing frame with respect to the vehicle body frame 20. 50, it will act via the front support frame 30 and the rear support frame 40. That is, the load acting on the vehicle body frame 20 is averaged in the vehicle front-rear direction as compared with the case where the load acts only through the front support frame 30 and the rear support frame 40. By equalizing the load acting on the vehicle body frame 20 in this way, the distortion of the vehicle body frame 20 caused by the non-uniform load is suppressed. Further, since the reinforcing frame 50, the front support frame 30, and the rear support frame 40 are in surface contact with the vehicle body frame 20, the surface pressure is reduced, and the load acting on the vehicle body frame 20 is further made uniform. As a result, it is possible to prevent the vehicle body frame 20 from being distorted.

Further, the reinforcing frame 50 is connected to the front support frame 30 and the rear support frame 40 by a plurality of bolts 60 arranged along the longitudinal direction of the vehicle body frame 20. That is, the reinforcing frame 50 is coupled to the front support frame 30 and the rear support frame 40 via bolts 60 so as to counter the tensile load acting on the vehicle body frame 20 in the longitudinal direction. Since the bolt 60 has a large allowable value for the tensile load, even if a longitudinal tensile load acts on the vehicle body frame 20 between the front support frame 30 and the rear support frame 40, the reinforcing frame 50 including the bolt 60 has this load. This makes it difficult for the vehicle body frame 20 to stretch. As described above, the deformation of the vehicle body frame 20 due to the tensile load between the front support frame 30 and the rear support frame 40 is suppressed by providing the reinforcing frame 50.

Further, the reinforcing frame 50 is pressed and fixed to the vehicle body frame 20 by the pressing member 70. That is, since the reinforcing frame 50 has a structure integrated with the vehicle body frame 20, the rigidity of the vehicle body frame 20 between the front support frame 30 and the rear support frame 40 is improved. By improving the rigidity of the vehicle body frame 20 in this way, it is possible to prevent the vehicle body frame 20 from being deformed between the front support frame 30 and the rear support frame 40.

According to the above first embodiment, the following effects are obtained.

In the mixer truck 100, the reinforcing frame 50 is arranged between the front support frame 30 and the rear support frame 40 along the vehicle body frame 20. Therefore, the rigidity of the vehicle body frame 20 between the front support frame 30 and the rear support frame 40 is improved by the reinforcing frame 50, and the reinforcing frame 50 is provided along the vehicle body frame 20 to deform the vehicle body frame 20. It is less likely to be distorted or distorted. As a result, it is possible to prevent the vehicle body frame 20 from being deformed between the front support frame 30 and the rear support frame 40.

Further, the frame is generally joined by welding, but when the welding work is performed on the vehicle body frame 20, spatter is scattered around. If the spatter adheres to the vehicle body, the device mounted on the vehicle body frame 20, or the like, it may cause a painting failure or a malfunction of the device. Further, if there is a welding process in the assembly process of the mixer truck 100, the spatter may be scattered, which may adversely affect the devices and the like assembled in the vicinity.

On the other hand, in the mixer truck 100, the reinforcing frame 50 can be easily assembled to the front support frame 30 and the rear support frame 40 simply by tightening the bolt 60. In order to join the frames together in this way, welding work that requires a lot of work man-hours and attention to the work atmosphere is not required, so even if the reinforcing frame 50 is provided, the assemblability and workability are deteriorated. I won't let you. As a result, it is possible to suppress an increase in the manufacturing cost of the mixer truck 100 and improve the quality of the mixer truck 100. Further, since the welding work is not required, the work atmosphere in the assembly process of the mixer truck 100 can be improved, and the quality of the devices and the like assembled in the surroundings can be improved.

Subsequently, a modification of the first embodiment will be described.

In the first embodiment, the reinforcing frame 50 is formed separately from the front support frame 30 and the rear support frame 40. Instead, the reinforcing frame 50 may be integrally formed with either the front support frame 30 or the rear support frame 40. In this case, the reinforcing frame 50 is connected to either the front support frame 30 or the rear support frame 40 by a bolt 60. Further, the reinforcing frame 50 may be divided, for example, at an intermediate point in the longitudinal direction, and the reinforcing frame 50 divided into the front support frame 30 and the rear support frame 40 may be integrally formed.

Further, in the first embodiment, the bolt 60 is used as the tightening member. Instead of this, rivets inserted into the insertion hole 52a and the insertion hole 32a may be adopted as the tightening member.

<Second Embodiment>
Next, the mixer truck 200 according to the second embodiment of the present invention will be described with reference to FIGS. 5 to 7. Hereinafter, the points different from those of the first embodiment will be mainly described, and the same reference numerals will be given to the same configurations as those of the first embodiment, and the description thereof will be omitted.

As shown in FIG. 5, the basic configuration of the mixer truck 200 is the same as that of the mixer truck 100 according to the first embodiment. The mixer truck 200 differs from the mixer truck 100 in that the reinforcing frame 150 is inserted into and fastened to the front support frame 130 and the rear support frame 140.

The front support frame 130 has a base portion 131 arranged along the vehicle body frame 20, and a support portion 133 extending upward from the base portion 131 and supporting the drive device 12. An inserted portion 132 into which the reinforcing frame 150 is inserted is provided at the end of the base portion 131 on the rear side of the vehicle. The base portion 131 is pressed and fixed to the vehicle body frame 20 by the pressing member 70, as in the first embodiment.

The rear support frame 140 includes a base portion 141 arranged along the vehicle body frame 20, a support portion 143 extending upward from the base portion 141 to support the roller ring 10b of the mixer drum 10, and a support portion 143 to which the hopper 14 and the chute 16 are assembled. , Have. An inserted portion 142 into which the reinforcing frame 150 is inserted is provided at the end portion of the base portion 141 on the front side of the vehicle. The base portion 141 is pressed and fixed to the vehicle body frame 20 by the pressing member 70, as in the first embodiment.

The reinforcing frame 150 includes a hollow main body portion 151 arranged along the vehicle body frame 20, a front insertion portion 152 provided on the vehicle front side of the main body portion 151, and a rear insertion portion provided on the vehicle rear side of the main body portion 151. It has a portion 153 and. The front insertion portion 152 is inserted into the inserted portion 132 of the front support frame 130, and the rear insertion portion 153 is inserted into the inserted portion 142 of the rear support frame 140. The main body portion 151 is pressed and fixed to the vehicle body frame 20 by the pressing member 70, as in the first embodiment.

Next, the coupling structure of the reinforcing frame 150 and the front support frame 130 will be described with reference to FIGS. 6 and 7. FIG. 6 is an enlarged view of a portion shown by the VI portion of FIG. FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG.

The front insertion portion 152 of the reinforcing frame 150 is provided with a plurality of insertion holes 152a through which the bolt 160 as a tightening member is inserted. The insertion hole 152a is provided in a direction orthogonal to the direction in which the vehicle body frame 20 extends. Further, a nut 162 is welded and fixed to the inside of the front insertion portion 152 for each insertion hole 152a.

The inserted portion 132 of the front support frame 130 is provided with a plurality of insertion holes 132a corresponding to the insertion holes 152a of the front insertion portion 152.

The bolt 160 is inserted into the insertion hole 132a and the insertion hole 152a from the outside of the insertion portion 132, and is screwed with the nut 162 provided in the front insertion portion 152. By tightening the bolt 160 with a predetermined tightening torque, the reinforcing frame 150 and the front support frame 130 are coupled. Instead of the configuration in which the reinforcing frame 150 is inserted into the front support frame 130, the front support frame 130 may be inserted into the reinforcement frame 150.

The reinforcing frame 150 and the rear support frame 140 are coupled in the same manner as the reinforcing frame 150 and the front support frame 130. Therefore, the description thereof will be omitted.

According to the above-mentioned second embodiment, the following effects are obtained.

In the mixer truck 200, the reinforcing frame 150 is arranged between the front support frame 130 and the rear support frame 140 along the vehicle body frame 20. Therefore, the rigidity of the vehicle body frame 20 between the front support frame 130 and the rear support frame 140 is improved by the reinforcing frame 150, and the vehicle body frame 20 is deformed by providing the reinforcing frame 150 along the vehicle body frame 20. It is less likely to be distorted or distorted. As a result, it is possible to prevent the vehicle body frame 20 from being deformed between the front support frame 130 and the rear support frame 140.

Further, the reinforcing frame 150 can be easily assembled by simply tightening the bolt 160 after being inserted into the front support frame 130 and the rear support frame 140. In order to connect the frames to each other in this way, there is no need for welding work or the like, which requires a lot of work man-hours and attention to the work atmosphere. Therefore, even when the reinforcing frame 150 is provided, the assemblability and workability are improved. It does not make it worse. As a result, it is possible to suppress an increase in the manufacturing cost of the mixer truck 200.

The configuration, operation, and effect of the embodiment of the present invention configured as described above will be collectively described.

The mixer trucks 100 and 200 include a vehicle body frame 20 extending in the front-rear direction of the vehicle, front support frames 30 and 130 provided on the vehicle body frame 20 to support the front of the mixer drum 10, and rear of the mixer drum 10 provided on the vehicle body frame 20. It is characterized by including a rear support frame 40, 140 for supporting, and a reinforcing frame 50, 150 arranged between the front support frame 30, 130 and the rear support frame 40, 140 along the vehicle body frame 20. ..

In this configuration, the reinforcing frames 50 and 150 are arranged between the front support frames 30 and 130 and the rear support frames 40 and 140 along the vehicle body frame 20. Therefore, the rigidity of the vehicle body frame 20 between the front support frames 30, 130 and the rear support frames 40, 140 is improved by the reinforcing frames 50, 150, and the reinforcing frames 50, 150 are provided along the vehicle body frame 20. This makes it difficult for the vehicle body frame 20 to be deformed or distorted. As a result, it is possible to prevent the vehicle body frame 20 from being deformed between the front support frames 30, 130 and the rear support frames 40, 140.

Further, the reinforcing frames 50 and 150 are fastened to the front support frames 30 and 130 and the rear support frames 40 and 140 via bolts 60 and 160.

In this configuration, the reinforcing frames 50 and 150 can be easily assembled to the front support frames 30 and 130 and the rear support frames 40 and 140 simply by tightening the bolts 60 and 160. In order to connect the frames to each other in this way, there is no need for welding work or the like, which requires a lot of work man-hours and attention to the work atmosphere. Therefore, even when the reinforcing frames 50 and 150 are provided, the assembleability and work Does not worsen sex. As a result, it is possible to suppress an increase in the manufacturing cost of the mixer trucks 100 and 200. Further, by separating the reinforcing frames 50 and 150 from the front support frames 30 and 130 and the rear support frames 40 and 140, the sizes of the front support frames 30 and 130 and the rear support frames 40 and 140 are extremely large. Can be avoided. Therefore, when cation coating of each frame, the conventional electrodeposition tank can be used as it is, and each frame can be stored without significantly expanding the storage space of the frame.

Further, the reinforcing frames 50 and 150 are integrally formed with either one of the front support frames 30 and 130 and the rear support frames 40 and 140, and the other of the front support frames 30 and 130 and the rear support frames 40 and 140. It is characterized in that it is fastened via bolts 60 and 160.

In this configuration, the number of parts is reduced by integrally forming the reinforcing frames 50 and 150 with the front support frames 30 and 130 or the rear support frames 40 and 140. Further, the reinforcing frames 50 and 150 can be easily assembled to the front support frames 30 and 130 or the rear support frames 40 and 140 simply by tightening the bolts 60 and 160. Even when the reinforcing frames 50 and 150 are provided in this way, the number of parts is reduced and welding work or the like is not required to connect the frames to each other, so that the manufacturing cost of the mixer trucks 100 and 200 increases. Can be suppressed.

Further, the reinforcing frame 50 includes a main body portion 51 arranged along the vehicle body frame 20, and flange portions 52, 53 provided at the end of the main body portion 51 and having an insertion hole 52a through which the bolt 60 is inserted. 52a is characterized in that the insertion hole 52a is formed in parallel with the direction in which the vehicle body frame 20 extends.

In this configuration, the reinforcing frame 50 is coupled to the front support frame 30 and the rear support frame 40 by bolts 60 arranged parallel to the direction in which the vehicle body frame 20 extends. That is, the reinforcing frame 50 is coupled to the front support frame 30 and the rear support frame 40 via bolts 60 so as to counter the tensile load acting on the vehicle body frame 20 in the longitudinal direction. In general, since the bolt 60 has a large allowable value for a tensile load, even if a longitudinal tensile load acts on the vehicle body frame 20 between the front support frame 30 and the rear support frame 40, the reinforcing frame including the bolt 60 is included. The 50 will withstand this load, and the vehicle body frame 20 will be difficult to stretch. As a result, it is possible to prevent the vehicle body frame 20 from being deformed or the like due to the tensile load between the front support frame 30 and the rear support frame 40.

Further, the flange portions 52 and 53 are characterized by having a thickness Ta equal to or greater than the plate thickness Tb of the main body portion 51.

In this configuration, the plate thickness Ta of the flange portions 52 and 53 is set to be equal to or larger than the plate thickness Tb of the main body portion 51. By improving the rigidity of the flange portions 52 and 53 in this way, it is possible to prevent deformation at the joint portion when the reinforcing frame 50 is coupled to the front support frame 30 and the rear support frame 40. Therefore, the front support frame 30, the rear support frame 40, and the reinforcing frame 50 are integrally configured, and the load acting on the vehicle body frame 20 is larger than the case where the load acts on the front support frame 30 and the rear support frame 40 only. Is also averaged in the front-rear direction of the vehicle. By equalizing the load acting on the vehicle body frame 20 in this way, it is possible to prevent the vehicle body frame 20 from being deformed between the front support frame 30 and the rear support frame 40.

Further, the reinforcing frames 50 and 150 are characterized by having a plate thickness Tb equal to or less than the plate thickness Tc of the vehicle body frame 20.

In this configuration, the plate thickness Tb of the reinforcing frames 50 and 150 has a thickness equal to or less than the plate thickness Tc of the vehicle body frame 20. In this way, the weight of the reinforcing frames 50 and 150 is reduced by reducing the plate thickness Tb of the main body 51. As a result, the reinforcing frame 50 can improve the strength of the vehicle body frame 20 and suppress the reduction of the load capacity.

Further, in the flange portions 52, 53, the lower surface 52b of the flange portions 52, 53 is flush with the lower surface 51a of the main body 51, or the lower surface 52b of the flange portions 52, 53 is closer to the lower surface 51a of the main body 51. It is characterized in that it is arranged at a position away from the upper surface 21a of the vehicle body frame 20.

In this configuration, the lower surface 51a of the main body 51 and the upper surface 21a of the side rail 21 are in surface contact with each other. Therefore, the surface pressure is reduced, and the load acting on the vehicle body frame 20 is made uniform. As a result, it is possible to prevent the vehicle body frame 20 from being distorted.

Further, the insertion hole 52a is characterized in that it is provided in a portion of the flange portions 52 and 53 above the main body portion 51 and a portion on the side thereof.

From the viewpoint of joining strength, it is preferable that the insertion holes 52a are provided on all sides so as to surround the main body 51. However, if the insertion hole 52a is provided between the main body 51 and the side rail 21, it becomes difficult to tighten the bolt 60. Therefore, in this configuration, the insertion holes 52a are provided on both sides and above the main body 51. As a result, when the reinforcing frame 50 is connected to the front support frame 30 and the rear support frame 40, the bolt 60 can be easily tightened.

Further, the flange portions 52 and 53 are characterized by having a notch portion 52c.

In this configuration, the notch 52c is formed in the flanges 52 and 53. By providing the notch portions 52c in the flange portions 52 and 53 in this way, the weight of the flange portions 52 and 53 can be reduced and the weight of the reinforcing frame 50 can be reduced. Further, by providing the notch portion 52c, it is possible to improve the degree of freedom in arranging the vehicle parts provided in the vicinity of the flange portions 52 and 53.

Further, the fastening member is a bolt 60, and is characterized in that it is inserted into the insertion hole 52a from the rear side of the vehicle.

In this configuration, the bolt 60 is inserted into the insertion hole 52a from the rear side of the vehicle. Therefore, the head of the bolt 60 is located on the rear side of the vehicle, and it is possible to prevent the head of the bolt 60 from being damaged by flying stones or the like while the vehicle is running. As a result, the bolt 60 can be easily removed.

Further, the reinforcing frames 50 and 150 are characterized in that they are made of a hollow pipe material.

In this configuration, the reinforcing frames 50 and 150 are made of a pipe material having a relatively high moment of inertia of area. By increasing the moment of inertia of area of the reinforcing frames 50 and 150 to improve the rigidity in this way, the rigidity between the front support frames 30 and 130 and the rear support frames 40 and 140 is improved. As a result, it is possible to prevent the vehicle body frame 20 from being deformed between the front support frames 30, 130 and the rear support frames 40, 140. Further, since the reinforcing frames 50 and 150 are hollow, it is possible to suppress an increase in the weight of the mixer trucks 100 and 200 even when the reinforcing frames 50 and 150 are provided.

Further, the mixer trucks 100 and 200 are further provided with a pressing member 70 that presses the reinforcing frames 50 and 150 against the vehicle body frame 20.

According to this configuration, the reinforcing frames 50 and 150 are pressed and fixed to the vehicle body frame 20 by the pressing member 70. That is, since the reinforcing frames 50 and 150 have a structure integrated with the vehicle body frame 20, the rigidity of the vehicle body frame 20 between the front support frames 30 and 130 and the rear support frames 40 and 140 is improved. As a result, it is possible to prevent the vehicle body frame 20 from being deformed between the front support frames 30, 130 and the rear support frames 40, 140.

Although the embodiments of the present invention have been described above, the above embodiments are only a part of the application examples of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiments. do not have.

100, 200 ... Mixer car, 10 ... Mixer drum, 20 ... Body frame, 30, 130 ... Front support frame, 32, 132 ... Flange part, 40, 140 ... Rear support frame , 42, 142 ... Flange part, 50, 150 ... Reinforcing frame, 51, 151 ... Main body part, 52 ... Front flange part, 52a ... Insertion hole (through hole), 53 ...・ Rear flange part, 60, 160 ・ ・ ・ bolt (fastening member), 62, 162 ・ ・ ・ nut, 70 ・ ・ ・ pressing member, 132 ・ ・ ・ inserted part, 142 ・ ・ ・ inserted part, 152 ・・ ・ Front insertion part, 152a ・ ・ ・ Insertion hole, 153 ・ ・ ・ Rear insertion part, Ta ・ ・ ・ Plate thickness of front flange part, Tb ・ ・ ・ Plate thickness of reinforcement frame, Tc ・ ・ ・ Plate of body frame Thick

Claims (10)

It is a mixer truck equipped with a mixer drum that is rotatably mounted on the vehicle.
The vehicle body frame extending in the front-rear direction of the vehicle and
A front support frame provided on the vehicle body frame and supporting the front of the mixer drum, and
A rear support frame provided on the vehicle body frame and supporting the rear of the mixer drum, and a rear support frame.
A reinforcing frame arranged between the front support frame and the rear support frame along the vehicle body frame is provided.
The reinforcing frame is fastened to the front support frame and the rear support frame via a fastening member, and is provided at a main body portion arranged along the vehicle body frame and an end portion of the main body portion through which the fastening member is inserted. With a flange portion on which a through hole is formed,
The mixer truck is characterized in that the through hole is formed in parallel with the direction in which the vehicle body frame extends. It is a mixer truck equipped with a mixer drum that is rotatably mounted on the vehicle.
The vehicle body frame extending in the front-rear direction of the vehicle and
A front support frame provided on the vehicle body frame and supporting the front of the mixer drum, and
A rear support frame provided on the vehicle body frame and supporting the rear of the mixer drum, and a rear support frame.
A reinforcing frame arranged between the front support frame and the rear support frame along the vehicle body frame is provided.
The reinforcing frame is integrally formed with either one of the front support frame and the rear support frame, and is fastened to any one of the front support frame and the rear support frame via a fastening member to form the vehicle body frame. It has a main body portion arranged along the above, and a flange portion provided at an end portion of the main body portion and having a through hole through which the fastening member is inserted.
The mixer truck is characterized in that the through hole is formed in parallel with the direction in which the vehicle body frame extends. The mixer truck according to claim 1 or 2, wherein the flange portion has a thickness equal to or larger than the plate thickness of the main body portion. The mixer truck according to any one of claims 1 to 3, wherein the main body portion has a plate thickness equal to or less than that of the vehicle body frame. The flange portion is arranged at a position where the lower surface of the flange portion is flush with the lower surface of the main body portion, or at a position where the lower surface of the flange portion is separated from the lower surface of the main body portion from the upper surface of the vehicle body frame. The mixer truck according to any one of claims 1 to 4, wherein the mixer truck is characterized in that. The mixer truck according to any one of claims 1 to 5, wherein the through hole is provided in a portion of the flange portion above the main body portion and a portion on the side thereof. The mixer truck according to any one of claims 1 to 6, wherein the flange portion has a notch portion. The mixer truck according to any one of claims 1 to 7, wherein the fastening member is a bolt and is inserted into the through hole from the rear side of the vehicle. The mixer truck according to any one of claims 1 to 8, wherein the reinforcing frame is formed of a hollow pipe material. The mixer truck according to any one of claims 1 to 9, further comprising a pressing member for pressing the reinforcing frame against the vehicle body frame.

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