JP2018105040A - Concrete pump vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concrete pump vehicle that can secure the stability of the vehicle while ensuring the rigidity of the entire frame.SOLUTION: By arranging a power switching assembly TA in which a power switching device T and hydraulic pump units 49, 50, at the arrangement position, are assembled below the upper end of a sub frame F2 omitting the cross member connecting the sub frame F2, a vehicle body stabilizes with the center of a gravity position of a concrete pumping vehicle as a low position. Instead of omitting the cross member connecting the sub frame F2, by the sub frame F2 is connected by a lateral direction connecting member 120 at a position corresponding to the upper side of the power switching assembly TA, the rigidity of the sub frame F2 is ensured.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a concrete pump car used when pressure-feeding concrete to its placement position.

  This type of concrete pump truck is proposed in Patent Document 1 below. A concrete pump car described in Patent Document 1 includes a concrete pump for pumping ready-mixed concrete (hereinafter referred to as “green concrete”) toward a placement site, and a hydraulic pump for supplying hydraulic oil to the concrete pump. And a power switching device (also referred to as “PTO”) for taking out the driving force of the hydraulic pump from the propeller shaft (also referred to as “drive shaft”).

  A concrete pump, a hydraulic pump, and a power switching device are attached to the chassis. The chassis includes a chassis frame and a subframe arranged on the upper side of the chassis frame. The sub-frames are provided as a pair spaced apart on both sides in the vehicle width direction, and are integrated by being connected by a cross member that extends in the vehicle width direction. The hydraulic pump is located behind the power switching device connected to the middle portion of the propeller shaft, is placed on the subframe, and is supported by the subframe.

No. 02-44577

  In the concrete pump car described in Patent Document 1, the hydraulic pump is located at a position where the center of gravity of the concrete pump car is high as much as the hydraulic pump is placed on the subframe arranged on the upper side of the chassis frame. For this reason, it is pointed out that the concrete pump truck is unstable. Therefore, in order to stabilize the concrete pump truck, it is conceivable to dispose the hydraulic pump below the subframe.

  However, the sub-frames are connected by the cross member to ensure rigidity. For this reason, if a hydraulic pump is arrange | positioned below with respect to a sub-frame, a cross member will not be provided. If it becomes so, the rigidity of the whole frame will fall.

  Therefore, an object of the present invention is to provide a concrete pump car that can ensure stability while ensuring rigidity of the entire frame.

  The concrete pump vehicle of the present invention includes a chassis frame arranged in parallel at a predetermined interval in the vehicle width direction, and a subframe mounted and fixed on the chassis frame at a predetermined interval in the vehicle width direction. A boom device for connecting a plurality of beams to supply concrete to the placement position, a concrete pump for pumping concrete toward the placement position, and supplying hydraulic oil to the concrete pump And a power switching device configured to take out the driving force of the hydraulic pump from a vehicle driving mechanism, and the hydraulic pump and the power switching device are assembled to form a power switching assembly. The power switching assembly is disposed below the upper end of the subframe, and the vehicle width is positioned above the power switching assembly. A lateral connection member that is arranged along the direction and connects the sub-frames in the vehicle width direction, and a vertical connection member that connects the chassis frame and the sub-frame in the vehicle height direction at a position near the side of the power switching assembly. At least one of the direction connecting members is provided.

  According to the concrete pump vehicle of the present invention having the above-described configuration, the power switching assembly of the hydraulic pump and the power switching device is disposed below the subframe, so that the center of gravity of the concrete pump vehicle is lower by that amount. At least one of a lateral connection member that connects the subframes in the vehicle width direction, and a vertical connection member that connects the chassis frame and the subframe in the vehicle height direction. By providing, the rigidity of the entire frame can be secured.

  In the concrete pump vehicle of the present invention, a configuration in which a lateral connection member different from the lateral connection member that connects the chassis frames in the vehicle width direction can be employed at the front and rear positions of the power switching assembly.

  By providing a lateral connection member that connects chassis frames in the vehicle width direction as in the above configuration, the rigidity of the entire frame is ensured even if the power switching assembly includes a hydraulic pump and a power switching device. it can.

  In the concrete pump vehicle of the present invention, stability can be ensured while ensuring rigidity of the entire frame.

It is a side view showing schematic structure of the piston type concrete pump of the present invention. It is a side view showing the positional relationship of the same power switching assembly and a longitudinal connection member. It is a rear view showing the positional relationship between the power switching assembly and the vehicle body frame in the vertical direction and the horizontal direction. It is a top view showing schematic structure of the concrete pump. It is a top view showing the pump drive cylinder and power switching assembly to which the hose was connected. It is the same side view. It is a side view showing the positional relationship in the up-down direction of the sub-frame and power switching assembly provided with the horizontal direction connection member. It is the same top view.

  Hereinafter, a concrete pump truck according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the concrete pump vehicle includes a body frame behind the driver's seat, and the body frame includes a chassis frame F1 and a subframe F2.

  The chassis frame F1 is a long member extending in the vehicle front-rear direction, and is arranged in a pair in parallel at a predetermined interval in the vehicle width direction to constitute a vehicle body. The sub frame F2 is fixed to the upper surface of the pair of chassis frames F1, and is formed to be long along the vehicle front-rear direction. That is, the sub-frame F2 is arranged in parallel at a predetermined interval in the vehicle width direction, like the chassis frame F1.

  As shown in FIG. 3, both the chassis frame F1 and the subframe F2 are made of a steel material having a U-shaped cross section. Specifically, the lower flange 92 of the subframe F2 is fixed to the upper flange 90 of the chassis frame F1 via the shim plate 91, and the outer sides in the vehicle width direction of the chassis frame F1 and the subframe F2 are arranged flush with each other. Has been.

  The sub frame F2 is formed to have a shorter length in the front-rear direction than the chassis frame F1, and the front end surface of the sub frame F2 is located rearward of the front end surface of the chassis frame F1. As shown in FIGS. 1 and 2, the sub-frame F <b> 2 includes a low position support portion 93 that is set lower than the rear portion at the front portion. The low position support portion 93 is formed integrally with the high position support portion 94 on the rear side via a stepped surface portion 95 along the vertical direction that is the vehicle height direction.

  As shown in FIG. 1, the concrete pump truck includes a boom device B for supplying ready-mixed concrete to a placement position. The boom device B is disposed at the front portion of the subframe F2. The schematic configuration of the boom device B will be described. The boom device B includes a gantry 96 fixed to the low-position support portion 93 at the front portion of the subframe F2, a slewing support base 97 installed on the gantry 96, and a slewing support. The stand 97 includes a support column 98 supported so as to be able to turn around a vertical axis, and a boom 100 provided at the upper end of the support column 98.

  The gantry 96 is fixed so as to pass to the low position support portion 93 of the pair of subframes F2. The boom 100 is a plurality of (for example, four) beams connected to each other so as to be bendable, and are arranged in order from the column 98 side, the first beam 101, the second beam 102, the third beam 103, and the first beam. The four beams 104 are combined. A boom pipe 105 that guides ready-mixed concrete pumped from the concrete pump 1 described later to the first beam 101 to the fourth beam 104 to the tip of the fourth beam 104 is fixed along the support column 98 and the boom 100. .

  The concrete pump truck includes a concrete pump 1 for pumping ready-mixed concrete, hydraulic pump units 49 and 50 for supplying hydraulic oil to the concrete pump 1 (pump drive cylinders 23 and 24 described later), a hydraulic pump unit 49, And a power switching device T, also referred to as a transfer PTO, which is configured to extract 50 driving forces from a propeller shaft D which is a driving mechanism of the vehicle. The concrete pump 1 is supported at the rear part of the chassis frame F1.

  As shown in FIG. 4, the concrete pump 1 includes a concrete pump main body 2, a valve device 3 disposed behind the concrete pump main body 2, a hydraulic oil relay block 44 shown in FIGS. 5 and 6, and a block 44 and a plurality of hydraulic oil hoses connected at one end side.

  As shown in FIG. 4, the concrete pump main body 2 includes a left pump cylinder 21 and a right pump cylinder 22 that are spaced apart and arranged in parallel in the vehicle width direction. A left pump drive cylinder 23 for driving the left pump cylinder 21 is provided at the base end (front end) of the left pump cylinder 21, and a right side for driving the right pump cylinder 22 is provided at the base end of the right pump cylinder 22. These pump drive cylinders 24 are integrally connected in the axial direction via a center frame 25. The pump cylinders 21 and 22 are arranged close to each other so as to have a slight gap in the left-right direction with the axes being parallel. The pump drive cylinders 23 and 24 are arranged close to each other so as to have a slight gap in the left-right direction with the axes being parallel.

  Pump pistons 21a and 22a are slidably mounted in the pump cylinders 21 and 22, and drive pistons 23a and 24a are slidably mounted in the pump drive cylinders 23 and 24. A pump piston 21a in the left pump cylinder 21 and a drive piston 23a in the left pump drive cylinder 23 are integrally connected by a left piston rod 26 that slidably penetrates the center frame 25. A pump piston 22a in the right pump cylinder 22 and a drive piston 24a in the right pump drive cylinder 24 are integrally connected by a right piston rod 27 that slidably penetrates the center frame 25.

  The pump drive cylinders 23 and 24 are partitioned into second hydraulic oil chambers 23b and 24b on the piston rods 26 and 27 side and first hydraulic oil chambers 23c and 24c on the drive pistons 23a and 24a side by the drive pistons 23a and 24a. Has been. The front ends (rear ends) of the pump cylinders 21 and 22 are opened as hydraulic oil discharge ends 21b and 22b. The discharge ends 21 b and 22 b of the pump cylinders 21 and 22 are connected to the front surface of the valve device 3.

  The valve device 3 includes a valve casing 31, a bottom lid 32, an S valve 33 (oscillating valve pipe), an S valve driving means 34, and a discharge pipe 35. The valve casing 31 is formed in a frame shape by a front wall 31a, a rear wall 31b, and left and right side walls 31c, 31c. The lower part of the valve casing 31 is opened to form an opening 31d. The opening 31d is closed by a bottom lid 32, and the opening 31d can be opened and closed by moving the bottom lid 32 by a cylinder (not shown).

  A hopper H that receives ready-mixed concrete is connected to the upper portion of the valve casing 31. In the lower part of the valve casing 31, the curved tubular S valve 33 is accommodated. The S valve 33 is parallel to the axis of the pump cylinders 21 and 22 and is configured to be rotatable around the axis of a rotation support shaft 33 a provided integrally with the S valve 33. With this configuration, the S valve 33 is configured to be switchable so that the discharge ends 21 b and 22 b of the pair of pump cylinders 21 and 22 are alternately in communication with the suction port 33 b of the S valve 33.

  An S valve driving means 34 is connected to the rotation support shaft 33a. The S valve driving means 34 rotates the rotation support shaft 33a in synchronization with the operation of the two pump pistons 21a and 22a, thereby switching the S valve 33. The S valve drive means 34 includes a left single-acting valve drive cylinder 34a and a right single-acting valve drive cylinder 34b that cooperate with each other. The distal ends of the valve drive cylinder 34a and the valve drive cylinder 34b are connected to each other via a connection arm 34c extending integrally from the rotation support shaft 33a, and the base ends of the valve drive cylinders 34a and 34b are connected to a concrete pump. The main body 2 is rotatably connected.

  During the operation of the concrete pump, the pair of valve drive cylinders 34a and 34b is configured so that, among the pair of left and right pump cylinders 21 and 22, the ready concrete sucked state is put into the valve casing 31 and the ready concrete is pumped. The S-valve 33 is switched and controlled so that a certain thing is alternately connected to the suction port 33b of the S-valve 33 to smoothly feed the ready-mixed concrete. That is, the S valve 33 has a first switching position that connects the suction port 33b to the discharge end 21b of the left pump cylinder 21, and a second switching position that connects the suction port 33b to the discharge end 22b of the right pump cylinder 22. Between the first switching position and the second switching position by the extension operation of the left valve drive cylinder 34a, and to the second switching position by the extension operation of the right valve drive cylinder 34b, respectively. It is switched and held.

  The front end of the discharge pipe 35 is connected to the rear wall 31 b of the valve casing 31 and is always in communication with the S valve 33, and the rear end is connected to the boom pipe 105. The boom pipe 105 is extended from the discharge pipe 35 toward the side of the vehicle body, further extended forward, inserted into the turning support base 97, and extended along the support column 98 and the boom 100. Yes.

  As shown in FIGS. 5 and 6, the eight ports 231a, 231b, 241a, 241b, 232a, 232b, 242a, and 242b provided in the pump drive cylinders 23 and 24 of the concrete pump 1 are provided with eight hoses 36. , 37, 38, 39, 45, 46, 47, 48 are connected to each other, and the other ends of the eight hoses 36, 37, 38, 39, 45, 46, 47, 48 are connected to the relay block 44. It is connected. One end of four hoses 40, 41, 42, 43 for supplying or discharging hydraulic oil to or from the block 44 is connected to the block 44, and the other end of the four hoses 40, 41, 42, 43 is 2 The two hydraulic pump units 49 and 50 are connected.

  The block 44 is formed in a substantially rectangular parallelepiped shape, and as shown in FIG. 5, 12 ports 51 to 62 for connecting the 12 hoses 36 to 43 and 45 to 48 are formed. The two ports 51 and 52 provided at the front end portion of the block 44 have two hoses with one ends connected to the first ports 231b and 241a inside the front end portions of the left and right pump drive cylinders 23 and 24, respectively. The other ends of 36 and 37 are connected to each other.

  Of the four ports 53, 54, 55, 56 provided on the left side of the block 44, the front port 53, and of the four ports 57, 58, 59, 60 provided on the right side of the block 44 The front port 57 is connected to the other ends of two hoses 38 and 39 each having one end connected to the first ports 231a and 241b outside the front ends of the left and right pump drive cylinders 23 and 24, respectively. Of the four ports 53, 54, 55, 56 provided on the left side of the block 44, the second and third ports 54, 55 from the front side, and the four ports 57, 58 provided on the right side of the block 44 , 59, 60, the second and third ports 58, 59 from the front side have the other ends of four hoses 40, 41, 42, 43 connected to the two hydraulic pump units 49, 50, respectively. Connected.

  The rear port 56 of the four ports 53, 54, 55, 56 provided on the left side of the block 44, and the rear of the four ports 57, 58, 59, 60 formed on the right side of the block 44 The other end of the two hoses 45 and 46, one end of which is connected to each of the second ports 232a and 242b outside the rear ends of the left and right pump drive cylinders 23 and 24, are connected to the side port 60, respectively. . The two ports 61, 62 provided on the rear surface of the block 44 have two hoses 47, one ends of which are connected to the second ports 232b, 242a inside the rear ends of the left and right pump drive cylinders 23, 24, respectively. The other ends of 48 are connected to each other.

  In the concrete pump vehicle having the above-described configuration, when the output of the engine is switched to the driving force of the concrete pump 1 by the power switching device T, the hydraulic oil is supplied from the oil tank (not shown) to the hydraulic pump units 49 and 50, the hose 40, 41, 42, 43, block 44, hose 36, 37, 38, 39 are supplied to pump drive cylinders 23, 24, or hydraulic pump units 49, 50 are returned to the oil tank, and a pair of By driving the pump drive cylinders 23 and 24, the ready-mixed concrete is alternately discharged from the discharge end 21b of the pump cylinder 21 and the discharge end 22b of the pump cylinder 22, and the ready-mixed concrete is supplied to the boom pipe 105 at a necessary head. .

  Returning to FIG. 1, the power switching device T is connected to the middle of the propeller shaft D in order to take out the driving force of the propeller shaft D rotating by the output of the engine. The power switching device T is configured to be switchable when the output of the engine is used as the driving force of the vehicle and the driving force of the concrete pump 1 by switching the connection of a plurality of built-in gears. The power switching device T and the hydraulic pump units 49 and 50 are assembled into a power switching assembly TA.

  The power switching device T is directly coupled to the middle portion of the propeller shaft D, and the hydraulic pump units 49 and 50 are coupled to the upper portion of the power switching device T and to the rear. Further, as shown in FIG. 6, the power switching device T and the hydraulic pump units 49 and 50 are connected via a gear 49a having an axial center in the front-rear direction.

  In the present embodiment, the hydraulic pump units 49 and 50 are reversible pumps that are assembled to each other and arranged side by side in the front-rear direction. Further, as shown in FIG. 7, two other pump units 106 that supply hydraulic oil to a hydraulic drive unit other than the concrete pump 1 are connected to the rear of the hydraulic pump unit 50 disposed at the rear. . The pump unit 106 is used for driving the S valve driving means 34, for example.

  The power switching assembly TA is disposed below the upper end of the subframe F2 (the upper end surface of the upper flange portion F2a in the subframe F2). In other words, the power switching assembly TA is arranged so as not to protrude upward with respect to the upper end of the subframe F2. As shown in FIG. 3, the left-right width W1, which is the vehicle width direction of the power switching assembly TA, is set to a dimension that falls between the vehicle body frames (the inner ends of the flange portions of the chassis frame F1 and the subframe F2 in the vehicle width direction) W2. Has been.

  In the power switching assembly TA, the shaft center position of the power take-off shaft 107 connected to the propeller shaft D in the power switching device T is compared with the lower end of the chassis frame F1 (the lower end surface of the lower flange portion F1a in the chassis frame F1). Is located above. In the power switching device T, the axial center position of the output shaft 108 that transmits the driving force to the hydraulic pump units 49 and 50 is disposed in the vicinity of the boundary between the chassis frame F1 and the subframe F2. The shaft center of the output shaft 108 and the shaft center of the hydraulic pump units 49 and 50 coincide and exist on the same shaft center.

  The power switching assembly TA is fixed so as to be suspended from the sub-frame F2 via support means arranged at a plurality of positions in the front-rear direction. The support means includes a lashing member 110 that integrates the power switching device T and the hydraulic pump units 49 and 50, and a support member 112 that fixes the lashing member 110 to the subframe F2.

  As shown in FIGS. 3 and 7, the securing member 110 is located on the side surface of the power switching device T and the hydraulic pump units 49 and 50, and spans the power switching device T and the hydraulic pump units 49 and 50 in the front-rear direction. The power switching device T and the hydraulic pump units 49 and 50 are integrated. As shown in FIG. 7, the lashing member 110 is opposed to the front plate-like portion 113 having the vertical direction as the longitudinal direction facing the side surface of the power switching device T, and the front and rear facing the side surfaces of the hydraulic pump units 49 and 50. A rear plate-like portion 114 whose direction is the longitudinal direction and an upper plate-like portion 115 that connects the front plate-like portion 113 and the rear plate-like portion 114 at their upper ends are integrally provided. The front plate-like portion 113 and the rear plate-like portion 114 are formed along the vertical direction, and the upper plate-like portion 115 is formed along the left-right direction. The left and right lashing members 110 are integrated by a connecting member 110A at their upper ends.

  The support member 112 is a member that fixes the securing member 110 to the subframe F2 via the buffer bushing 116. As shown in FIG. 7, the support member 112 is disposed so as to be separated from the front-rear direction of the securing member 110. As shown in FIG. 3, the support member 112 includes an opposing plate-like portion 117 that faces the upper plate-like portion 115 of the tying member 110 below, and a fixed plate-like portion 118 that is attached to the subframe F2 by bolts 118a. Is formed integrally. The upper plate-like portion 115 of the tying member 110 and the opposing plate-like portion 117 of the support member 112 are attached via the buffer bush 116.

  In the region where the power switching assembly TA is disposed at the above position, no cross member for connecting the sub-frames F2 is provided. Therefore, in the concrete pump vehicle according to the present embodiment, the lateral connecting member 120 for securing rigidity is provided to connect the sub frames F2 in the vehicle width direction at a position avoiding the power switching assembly TA.

  As shown in FIGS. 1 and 7, the lateral direction connecting member 120 is arranged on the upper side and the rear side with respect to the power switching assembly TA and along the vehicle width direction as shown in FIG. 8. Yes. In this case, a steel material having a U-shaped cross section is used for the lateral connection member 120. In addition, the sub-frame F2 is reinforced at the front and rear positions with respect to the power switching assembly TA by a conventionally provided cross member separately from the lateral connection member 120.

  Further, as shown in FIG. 1, the chassis frame F1 is provided with a front lateral connecting member 120A for connecting the chassis frames F1 in the lateral direction on the front side of the power switching assembly TA, and on the rear side of the power switching assembly TA. A rear lateral connecting member 120B for connecting the chassis frames F1 in the lateral direction is provided. The rigidity of the chassis frame F1 is ensured by the front lateral connecting member 120A and the rear lateral connecting member 120B. In addition, the arrangement position in the front-rear direction of the rear lateral connection member 120B is the same position as the lateral connection member 120. 120 A of front side direction connection members are arrange | positioned under the mount frame 96, and support a part of weight of the boom apparatus B as a load. The front lateral connecting member 120 </ b> A and the rear lateral connecting member 120 </ b> B have the same configuration as the lateral connecting member 120.

  As shown in FIG. 2, the concrete pump truck further includes a longitudinal connecting member 121 for securing rigidity. The longitudinal connecting member 121 is provided to connect the chassis frame F1 and the subframe F2 in the vertical direction at a position near the side of the power switching assembly TA. In this case, the longitudinal connecting member 121 is arranged by selecting a position corresponding to the position of the cross member omitted by arranging the power switching assembly TA at the above-described position. That is, the longitudinal connecting member 121 is disposed at a position corresponding to the side of the power switching assembly TA.

  The vertical direction connecting member 121 is a member that connects and secures the chassis frame F1 and the subframe F2 at the vehicle width direction outer side position. The vertical connecting member 121 integrally has a rectangular plate-shaped lower plate portion 122 fixed to the chassis frame F1 by bolts 121a and a rectangular plate-shaped upper plate portion 123 fixed to the subframe F2 by welding. Prepare. The longitudinal connecting member 121 is reinforced by ribs 124 along the longitudinal direction. Such a longitudinal connecting member 121 is disposed not only at a position corresponding to the position of the omitted cross member but also at a position necessary for reinforcing the body frame.

  In this concrete pump vehicle, the power switching device T and the hydraulic pump units 49 and 50 are assembled to form a power switching assembly TA. The power switching assembly TA is supported by the subframe F2. Therefore, the subframe F2 needs to support a weight corresponding to the power switching assembly TA. Moreover, in the subframe F2, the cross member is omitted at the position where the power switching assembly TA is disposed.

  However, in this concrete pump car, instead of omitting the cross member for connecting the sub-frame F2 at the position where the power switching assembly TA is disposed, a lateral connecting member 120 is prepared and is placed closer to the upper side of the power switching assembly TA. The rigidity of the sub-frame F2 is ensured by arranging the sub-frames F2 at the corresponding positions. Moreover, the longitudinal connecting member 121 is disposed at least at a position corresponding to the position of the omitted cross member. With this configuration, the sub-frame F2 can support the weight of the power switching assembly TA, and the rigidity is ensured.

  Further, in this concrete pump car, the power switching assembly TA is disposed below the upper end of the subframe F2 by omitting the cross member connecting the subframe F2 at the position where the power switching assembly TA is disposed. Realized. By comprising in this way, the gravity center position of a concrete pump vehicle becomes a low position, and a vehicle body can be stabilized by that much.

  Further, by providing the low position support portion 93 at the front portion of the subframe F2 and disposing the mount 96 on the low position support portion 93, even if the mount 96 is at the low position of the subframe F2, the corresponding amount can be reduced. Only the body can be stabilized. As described above, the gantry 96 is fixed so as to pass to the low position support portion 93 of the pair of subframes F2. Therefore, the gantry 96 has a function as a lateral connection member that couples the subframes F2 in the lateral direction (vehicle width direction).

  By the way, in general, in order to increase the discharge flow rate and discharge pressure of ready-mixed concrete in this type of concrete pump car, a corresponding large-sized power switching device T and hydraulic pump units 49 and 50 are required. In this regard, in the present embodiment, in the power switching assembly TA, the power switching device T and the hydraulic pump units 49 and 50 are arranged in the front-rear direction. That is, in the power switching assembly TA, one hydraulic pump unit is not increased in size, but is connected as a plurality of hydraulic pump units 49 and 50, so that a substantially large capacity hydraulic pump unit is obtained. It is possible to increase the discharge flow rate and discharge pressure.

  The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. The same applies to the specific configuration of each part.

  In the above embodiment, instead of the cross member omitted in the region where the power switching assembly TA is disposed, the lateral connection member 120 and the vertical connection member 121 for securing rigidity are provided. However, by providing at least one of the horizontal connecting member 120 and the vertical connecting member 121, it is possible to replace the omitted cross member.

  In the said embodiment, the concrete pump vehicle of the structure which pumps ready-mixed concrete using S valve | bulb was illustrated. However, it can also be applied to a squeeze-type concrete pump vehicle that pumps ready-mixed concrete by squeezing the pumping tube set on the inner periphery of the cylindrical drum while squeezing it with a roller. Moreover, in the said embodiment, the case where the hydraulic circuit was an open circuit which returns hydraulic oil from a tank with respect to a tank was illustrated. However, the present invention can also be applied to a configuration using a closed circuit as a hydraulic circuit.

  In the above embodiment, the power switching device is provided in the middle part of the propeller shaft of the vehicle so as to extract the power from the propeller shaft. However, the present invention is not limited to this, and the power switching device is configured to extract the engine power from another drive mechanism. You can also.

  In the said embodiment, the case where the horizontal direction connection member 120 was arrange | positioned along a vehicle width direction, ie, the case where it orthogonally provided to the sub-frame F2, was illustrated. However, if the lateral connecting member 120 is passed between the subframes F2 so as to connect the end in the vehicle width direction to the subframe F2, the longitudinal direction of the subframe F2 is not the direction perpendicular to the subframe F2. You may arrange | position with inclination with respect to a direction. That is, the lateral direction connecting member 120 may be configured to connect the subframes F2 with both ends thereof being displaced in the front-rear direction.

  In the above embodiment, the case where the vertical direction connecting member 121 is provided so as to connect the chassis frame F1 and the subframe F2 in the vertical direction is illustrated. However, the vertical connecting member 121 is configured to be inclined in the front-rear direction with respect to the vertical direction in addition to the vertical direction as long as the upper end is connected to the chassis frame F1 and the lower end is connected to the subframe F2. May be.

  DESCRIPTION OF SYMBOLS 1 ... Concrete pump, 2 ... Concrete pump main body, 49, 50 ... Hydraulic pump unit, 49a ... Gear, 93 ... Low position support part, 94 ... High position support part, 110 ... Locking member, 112 ... Support member, 113 ... Front plate-like portion, 114 ... rear plate-like portion, 115 ... upper plate-like portion, 117 ... opposing plate-like portion, 118 ... fixed plate-like portion, 120 ... lateral connection member, 121 ... vertical connection member, 122 ... lower Plate part, 123 ... Upper plate part, B ... Boom device, D ... Propeller shaft, F1 ... Chassis frame, F2 ... Subframe, T ... Power switching device, TA ... Power switching assembly

Claims (2)

A chassis frame disposed in parallel at a predetermined interval in the vehicle width direction, and a subframe mounted and fixed on the chassis frame at a predetermined interval in the vehicle width direction,
A boom device for connecting a plurality of beams to supply concrete to the placement position, a concrete pump for feeding concrete toward the placement position, and a hydraulic pressure for supplying hydraulic oil to the concrete pump A pump and a power switching device configured to take out the driving force of the hydraulic pump from the driving mechanism of the vehicle;
The hydraulic pump and the power switching device are assembled into a power switching assembly,
The power switching assembly is disposed below the upper end of the subframe,
A lateral connection member that is arranged along the vehicle width direction on the upper side of the power switching assembly and connects the sub frames in the vehicle width direction, and the chassis frame and the sub at a position near the side of the power switching assembly. A concrete pump car comprising at least one of longitudinal connecting members for connecting frames in a vehicle height direction.   2. The concrete pump vehicle according to claim 1, further comprising a lateral connection member that is separate from the lateral connection member and connects the chassis frames in the vehicle width direction at front and rear positions of the power switching assembly.

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