JP3172880B2 - Drive for mixer drum - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a drive device for a mixer drum in a concrete mixer truck.

[0002]

2. Description of the Related Art A mixer drum mounted on a bed of a concrete mixer truck is configured to be rotated for various purposes, and a driving device for rotating the mixer drum is conventionally shown in FIG. Structures have been proposed.

That is, the conventional device for driving a mixer drum is driven by a hydraulic pump 1 driven by the rotation of a traveling engine E mounted on a concrete mixer truck A, and a hydraulic pressure supplied from the hydraulic pump 1. And a hydraulic motor 2.

The traveling engine E and the hydraulic pump 1
Are connected by a drive shaft 4 in the presence of a universal joint 3, and the hydraulic pump 1 and the hydraulic motor 2 are connected via a pipe 5, while the hydraulic motor 2 is integrated with a speed reducer 6, The rotary shaft 6a from the machine 6 is connected to the mixer drum D.

Therefore, according to the driving apparatus of this conventional example, the hydraulic pump 1 is driven by the rotation of the traveling engine E, the hydraulic motor 2 is driven by the hydraulic pressure supplied from the hydraulic pump 1, and the speed reducer 6 is driven. , The rotation of the mixer drum D becomes possible.

[0006]

However, in the above-mentioned conventional mixer drum driving device, various components are exposed on the loading platform a of the concrete mixer truck A, and the concrete components are exposed to these components. In recent years, since it is easy to adhere, and since removal of these, that is, car washing is troublesome, in recent years, there has been a tendency to be shunned by consumers.

Therefore, of the above components, at least the hydraulic pump 1 and the hydraulic motor 2 are integrated to form a pipe 5
However, in view of the actual situation, it is expected that it will be difficult to equip a drive unit in which the hydraulic pump 1 and the hydraulic motor 2 are integrated without any obstacle.

That is, while the mixer drum D is stipulated to be mounted on the carrier a with an inclination angle θd of about 16 to 20 degrees with respect to the horizontal plane,
The traveling engine E of the concrete mixer truck A is mounted so as to be tilted backward at an inclination angle θe that is approximately 5 degrees with respect to the horizontal plane.

Therefore, when the hydraulic pump 1 and the hydraulic motor 2 are integrated, the input shaft 1a of the hydraulic pump 1 and the output shaft 2a of the hydraulic motor 2 (shown by imaginary lines in the figure).
Are parallel to each other, the input shaft 1a of the hydraulic pump 1 and the drive shaft e of the traveling engine E
Is extremely large.

[0010] Further, even in the case of the drive shaft e of the traveling engine E, the protruding position of the drive shaft e toward the carrier a on the plane varies depending on the manufacturer. Even if the connection with the drive shaft e is made by the drive shaft 4 in the presence of the universal joint 3, there is a fear that the realization is impossible.

[0011] The present invention has been made in view of the above circumstances, and an object thereof is to provide a hydraulic pump even if the structure of a concrete mixer truck serving as a truck of a mixer drum varies depending on a manufacturer. It is an object of the present invention to provide a mixer drum driving device which is optimal for being mounted on a bed of a concrete mixer truck in a state where a hydraulic motor and a hydraulic motor are integrated.

[0012]

To achieve the above object, the present invention provides a hydraulic pump driven by a driving force from a traveling engine of a concrete mixer truck, and a concrete mixer driven by a driving force from the hydraulic pump. A hydraulic motor for rotating a mixer drum of a car via a speed reducer, and a mixer drum driving device having a unit block integrated by assembling in a casing; A plurality of bolt insertion holes are set on the casing on the unit block side on the same circumference around the output shaft of the hydraulic motor, and a plurality of bolt insertion holes are provided on the casing of the unit block side. A large number of bolt holes or curved long holes are formed on the same circumference while facing the bolt insertion holes around the rotation axis of The unit block is pivoted in the direction of rotation to align with the casing of the damper, and then the output shaft of the hydraulic motor is connected to the rotation shaft of the reducer, and a bolt is inserted between the bolt insertion hole and the bolt hole or slot. It is characterized by being worn.

[0013]

Therefore, when the unit block in which the hydraulic pump and the hydraulic motor are integrated is connected to the speed reducer, the axial direction of the input shaft of the hydraulic pump and the output shaft of the hydraulic motor are set to intersect. Since it is set, the intersection angle between the input shaft of the hydraulic pump and the drive shaft of the traveling engine mounted on the concrete mixer truck can be suppressed to a small value.

Further, since the unit block is connected to the speed reducer at a position where the unit block is turned at an arbitrary angle about the rotation axis of the speed reducer, the structure of the concrete mixer truck serving as the truck of the mixer drum varies depending on the manufacturer. Therefore, even if the drive shaft from the traveling engine is projected to an arbitrary position on the horizontal plane, the unit block can always be connected to the reduction gear.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. A driving device for a mixer drum according to one embodiment of the present invention is shown in FIGS. This is a hydraulic pump 1 driven by a driving force from a traveling engine E of a concrete mixer truck, and a hydraulic motor that rotationally drives a mixer drum D of the concrete mixer truck via a speed reducer 6 by the driving force from the hydraulic pump 1. 2 and a unit block 10 integrated into a casing 11. The axis of the input shaft 1a of the hydraulic pump 1 and the axis of the output shaft 2a of the hydraulic motor 2 are set so as to intersect each other. Further, a plurality of bolt insertion holes 13 are provided on the same circumference around the output shaft 2a of the hydraulic motor 2 in the casing 11 on the unit block 10 side, and the rotating shaft 62 of the speed reducer 6 is mounted on the casing 61 of the speed reducer 6. A number of bolt holes 61a or curved long holes are formed on the same circumference while being opposed to the bolt insertion holes 13 with the center as the center. Then, the unit block 10 is turned around the rotation shaft 62 of the reduction gear 6 in the rotation direction to align the unit block 10 with the casing 61 of the reduction gear 6, and then the output shaft 2 a of the hydraulic motor 2 is connected to the rotation shaft 62 of the reduction gear 6. In addition, the bolt 12 is mounted between the bolt insertion hole 13 and the bolt hole 61a or the elongated hole. As shown in FIG. 1, the drive device for the mixer drum is mounted on a bed a of a concrete mixer truck A, as in the conventional example.

That is, the drive unit integrally includes a hydraulic pump 1 driven by the rotation of the traveling engine E of the concrete mixer truck A and a hydraulic motor 2 driven by the hydraulic pressure supplied from the hydraulic pump 1. Unit block 1
It has zero.

The input shaft 1a of the hydraulic pump 1 in the unit block 10 and the drive shaft e of the traveling engine E are connected by the drive shaft 4 under the presence of the universal joint 3, and the hydraulic motor 2 in the unit block 10 Is transmitted to the speed reducer 6.

The rotation from the speed reducer 6 is transmitted to the mixer drum D via the rotation shaft 6a.

In the unit block 10, the axial direction of the input shaft 1a of the hydraulic pump 1 and the output shaft 2a of the hydraulic motor 2 (see FIG. 2) are intersecting directions, that is, the axial line of the hydraulic pump 1. And the axis of the hydraulic motor 2 are set so as to intersect at an appropriate acute angle θ, and the unit block 10 is turned at an arbitrary angle about the rotation axis 6a of the speed reducer 6 at an arbitrary angle. It is configured to be connected to the speed reducer 6.

Specifically, the axis of the input shaft 1a of the hydraulic pump 1 intersects the axis of the drive shaft 4 at a slight inclination angle, and the axis of the drive shaft e of the traveling engine E also has a slight inclination. They are set to intersect at corners.

On the other hand, as shown in FIG. 2, the unit block 10 has a casing 11 having a so-called bent shape as a whole, and has a structure for mounting to the speed reducer 6 by using bolts 12. It has a mounting structure.

That is, in the unit block 10, as shown in FIG. 3, the hydraulic motor 2 is provided with a plurality of bolt insertion holes 13 on the same circumference, that is, four bolt insertion holes in the illustrated example. In the speed reducer 6, as shown in FIG. 3, screw holes 61a into which the bolts 12 are screwed into the casing 61 (see FIG. 2) have extremely fine pitches on the same circumference, that is, 15 in the illustrated example. It is said that it is opened at intervals of degrees.

In the unit block 10,
Output shaft 2a of hydraulic motor 2 and gear 62 in reduction gear 6
Is connected to the inner periphery by a spline structure.

Therefore, in the driving device according to this embodiment formed as described above, the unit block 1
3, the direction of the axis 11a of the unit block 10 is set at the same angle on the side of the speed reducer 6 as shown by the imaginary line in FIG. The rotation axis of the speed reducer 6 at an arbitrary set angle such as 45 degrees of the pitch, that is, the gear 62 in the illustrated example.
Can be connected at a position turned around the center.

In the above description, a large number of bolt holes are selectively used. However, the present invention can be embodied by using an appropriate number of curved elongated holes instead. Of course, it is.

[0026]

As described above, according to the present invention, a hydraulic pump driven by a driving force from a traveling engine of a concrete mixer truck, and a mixer mounted on a bed of the concrete mixer truck by a driving force from the hydraulic pump. In a drive device for a mixer drum having a unit block in which a hydraulic motor that rotationally drives the drum via a speed reducer is integrated, an axial direction between an input shaft of a hydraulic pump and an output shaft of the hydraulic motor in the unit block Are set to be in the cross direction, and the unit block is configured to be connected to the speed reducer at a position turned at an arbitrary angle about the rotation axis of the speed reducer. Even if the structure of the concrete mixer truck, which is the truck of the mixer drum, varies according to the manufacturer, the hydraulic pump and hydraulic motor Not only can it be mounted on the bed of a concrete mixer truck in the form of an integrated unit block, but also its operation is not overdosed, so a reliable drive is guaranteed and the mixer There is an advantage that is most suitable for use as a driving device for a drum.

[Brief description of the drawings]

FIG. 1 is a partial schematic view showing a concrete mixer truck equipped with a drive device according to an embodiment of the present invention.

FIG. 2 is an exploded side view showing a unit block constituting a drive device according to the present invention, partially cut away together with a speed reducer.

FIG. 3 is an explanatory diagram showing a connection state between a unit block and a speed reducer.

FIG. 4 is a partial schematic view showing a state where a conventional driving device is mounted on a concrete mixer truck.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hydraulic pump 1a Input shaft 2 Hydraulic motor 2a Output shaft 6 Reduction gear 10 Unit block 62 Gear which is a rotating shaft A Concrete mixer truck a Loading platform D Mixer drum E Engine for traveling

Claims (1)

(57) [Claims] 1. A hydraulic pump driven by a driving force from a traveling engine of a concrete mixer truck, a hydraulic motor rotating a mixer drum of the concrete mixer truck via a speed reducer by a driving force from the hydraulic pump, In a mixer drum driving device having a unit block integrated by assembling in a casing, an axis of an input shaft of a hydraulic pump and an output shaft of a hydraulic motor are set so as to intersect with each other. A plurality of bolt insertion holes are provided on the same circumference around the output shaft of the hydraulic motor in the casing of the casing, and the same circle is formed in the casing of the reduction gear while facing the bolt insertion hole about the rotation axis of the reduction gear. A number of bolt holes or curved long holes are formed around the circumference, and the unit block is turned in the direction of rotation about the rotation axis of the reduction gear to A driving device for a mixer drum, wherein the output shaft of a hydraulic motor is connected to a rotating shaft of a speed reducer, and a bolt is mounted between a bolt insertion hole and a bolt hole or a long hole.