KR101102817B1 - Multi purpose loaders - Google Patents

Abstract

The present invention relates to a multi-purpose loader that can be used in various fields in agriculture, animal husbandry and construction. According to an aspect of the present invention, a front wheel case coupled to a rotatable front wheel at an end and a rear wheel rotatably coupled to a rear wheel at an end are provided. A lower frame provided with a case, an upper frame having a cab coupled to an upper side of the lower frame and equipped with a steering wheel at an upper portion thereof, and installed between the upper frame and the lower frame to rotate the upper frame with respect to the lower frame. On the upper frame pivot member, the drive unit installed in the lower frame to drive the front and rear wheels, the steering unit installed in the lower frame to rotate the front and rear wheels in accordance with the rotation of the steering wheel, and the end of the boom installed in the upper frame A link portion having a link body to be coupled and an attachment insertion protrusion formed at an end of the link body, Attach garment insertion projection is inserted into the support such that the upper support protrusion insertion groove is formed, and a multi-purpose loaders comprising the attachment the support wings are formed so that the link body is supported on both sides is provided.

Multi purpose, loader, steering, link, shock absorber

Description

Multi purpose loaders {MULTI-PURPOSE LOADER}

The present invention relates to a loader, and more particularly, to a multi-purpose loader that can be used in various fields, such as agriculture, livestock industry and construction.

In general, an industrial vehicle such as a loader is used for moving a powder such as soil or sand in a narrow space, or for loading an object to a high place.

According to such a loader or the like, front and rear wheels are installed at the front and rear of the lower body frame, and a boom assembly to which attachments such as buckets and forks are mounted is installed above the body frame, and the boom assembly is moved up and down with respect to the body frame. To do the job.

The prior art related to the above-mentioned loader is disclosed in Korean Patent Application Publication No. 10-0631388 (October 04, 2006) "Industrial Vehicle". The prior art includes a steering device for steering the front and rear wheels in the same direction without limiting the steering angle and a differential driving device having a simple configuration, so that the vehicle traveling direction can be easily switched, and the work machine horizontal adjusting device and the boom length adjusting device in the boom assembly. Is installed, the vehicle is equipped with an upper frame turning device, and the movement trajectory of the work machine tip is moved along an approximately vertical straight path, so that the boom length is adjusted to an industrial vehicle that can freely select the loading position of the object.

The prior art is equipped with a steering device having a drive chain driven by a steering cylinder and a sprocket, so that the front and rear wheels are steered in the same direction without restricting the steering angle, so that the vehicle traveling direction is easily switched even in a narrow work space and the differential driving of the left and right wheels is performed. This has the advantage of being effective. However, since the process of detaching the work machine to the boom assembly is made by bolting or the like, there is a delay in the work time and the replacement work is inconvenient.

The present invention has been made to solve the problems described above, an embodiment of the present invention relates to a multi-purpose loader that can be used not only to replace the attachment quickly, but also variously used in the agricultural, livestock industry and construction.

A preferred embodiment of the present invention is a lower frame having a front wheel case coupled to the front wheel rotatably coupled to the end and a rear wheel case coupled to the rear wheel rotatably at the end, coupled to the upper side of the lower frame, the steering wheel on the top An upper frame provided with a cab mounted thereto, an upper frame pivot member installed between the upper frame and the lower frame to rotate the upper frame with respect to the lower frame, a drive unit installed in the lower frame to drive the front and rear wheels, Link is provided in the lower frame and the steering portion for rotating the front and rear wheels in accordance with the rotation of the steering wheel, the link body coupled to the end of the boom is installed on the upper frame and the attachment insertion protrusion formed on the end of the link body The insertion protrusion support groove is formed on the upper side so that the attachment insertion protrusion of the link portion is supported. Including the attachment The support wings are formed such that the support body provides a multi-purpose loaders which comprises.

According to one embodiment of the present invention as described above, first, it is possible not only to quickly replace attachments such as buckets, forks, clamps, brushes, etc., but also to provide a multi-purpose loader that can be used in various fields in agriculture, animal husbandry, and construction. have.

Second, the upper body portion can be rotated 360 degrees by the upper frame pivot member installed between the lower frame and the upper frame can add convenience to the work.

Third, since the front and rear wheels can be steered simultaneously by the steering unit, the radius of rotation can be minimized.

Fourth, it is possible to minimize the impact on the vehicle body by the shock absorber installed between the lower frame and the front wheel shaft case.

1 is a perspective view illustrating a multi-purpose loader according to an embodiment of the present invention, FIG. 2 is a side view of the multi-purpose loader shown in FIG. 1, FIG. 3 is a front view of the multi-purpose loader shown in FIG. 1, and FIG. 4 is 1 is a rear view of the multi-purpose loader shown in FIG. 1, FIG. 5 is a plan view of the multi-purpose loader shown in FIG. 1, and FIG. 6 shows a lower frame, a driving unit, a steering unit, and a link unit employed in the multi-purpose loader shown in FIG. 1. FIG. 7 is an operation state diagram of the driving unit in FIG. 6, and FIG. 8 is a rear view illustrating a state in which a lower frame employed in the multipurpose loader illustrated in FIG. 1 is fixed to the front wheel shaft case by an impact buffer unit. FIG. 9 is a rear view illustrating a state in which a lower frame employed in the multipurpose loader illustrated in FIG. 1 is fixed to a rear axle case, and FIG. 10 is an operating state diagram of a steering unit employed in the multipurpose loader illustrated in FIG. 1. 11 is a side view illustrating a state in which a link unit employed in the multi-purpose loader illustrated in FIG. 1 is combined with an attachment, and FIG. 12 is a perspective view illustrating a state in which the link unit illustrated in FIG. 11 is replaced with another attachment. 13 is a hydraulic circuit diagram of the multi-purpose loader shown in FIG. 1.

Multi-purpose loader 1 according to a preferred embodiment of the present invention, the lower frame 10, the upper frame 20, the upper frame pivot member 30, the drive unit 40, the steering unit 50, the link unit 70 It includes an attachment 80, shock absorber 90.

The lower side of the lower frame 10 is coupled to the front wheel shaft case 11 and the rear wheel shaft case 12, as shown in Figure 5, the upper frame 20 to be described later as shown in Figure 6 Rotating support shafts 13 are formed on the outer circumferential surface to which the bearings 13a are coupled.

As shown in FIG. 5, the front wheel shaft 11a having the front wheel driven gear 11aa formed therein is rotatably installed in the front wheel shaft case 11, and the front wheel shaft case 11 is provided. The front wheels 11b are rotatably coupled to both ends of the front wheel shaft case 11, and the front wheel drive shaft 11c having the front wheel drive gears 11ca engaged with the front wheel driven gears 11aa is rotatable at the center portion of the front wheel shaft case 11. To be combined.

As shown in FIG. 5, the rear wheel shaft 12a having the rear wheel driven gear 12aa formed therein is rotatably installed in the rear wheel shaft case 12, and the rear wheel shaft case 12 is provided. The rear wheels 12b are rotatably coupled to both ends of the rear wheel shaft case 12, and the rear wheel drive shaft 12c having the rear wheel drive gears 12ca engaged with the rear wheel driven gears 12aa is rotatable at the center portion of the rear wheel shaft case 12. To be combined.

The upper frame 20 is rotated while being supported by the lower frame 10 by the upper frame pivot member 30 to be described later, the lower side of the lower frame 10 as shown in FIG. A rotating ring 21 is formed to accommodate the bearing 13a, and the hinge 22a is coupled to the upper side of the upper frame 20 so that the cab 22 is rotatable as shown in FIG. 2. In addition, one end of the upper frame 20 is hingedly coupled to the end of the boom 23, as shown in Figure 2, the boom 23 is rotated up and down by the boom actuator 24. Furthermore, a link part actuator 25 for operating the link part 70 to be described later is installed on one side of the upper frame 20.

A steering wheel 22b for operating the steering unit 50 to be described later is installed in the cab 22, and the cab 22 is foldable in the upper frame 20 in a foldable structure for easy maintenance of the loader. Is installed. That is, a cab drive actuator (not shown) is provided below the cab 22, and the top of the cab 22 is preferably fixed to the upper frame 20 by the clamp 22c.

The upper frame pivot member 30 is installed between the lower frame 10 and the upper frame 20 to rotate the upper frame 20 with respect to the lower frame 10, and the upper frame pivot member 30 ) Preferably uses a turning joint.

As shown in FIG. 6, the turning joint is preferably bolted to the lower frame 10 and has a base shaft 31 formed with a plurality of hydraulic oil inlets 31a, and one side of the turning joint is rotatable to the base shaft 31. The other side is preferably bolted to the upper frame 20 and consists of a housing 32 in which a plurality of hydraulic oil outlets 32a are formed.

The driving unit 40 drives the front wheel 11b and the rear wheel 12b to advance and back the multi-purpose loader 1 according to the preferred embodiment of the present invention. As illustrated in FIG. 6, the front wheel shaft case 11 is shown. A front wheel coupling 41 which is preferably bolted to the front wheel drive shaft 11c of the crankshaft, a front wheel drive motor 42 that is bolted to the front wheel coupling 41 to drive the front wheel drive shaft 11c, and a rear wheel. The rear wheel coupling 43, which is preferably bolted to the rear wheel drive shaft 12c of the shaft case 12, and the rear wheel drive motor 44 that is bolted to the rear wheel coupling 43 to drive the rear wheel drive shaft 12c. And a universal joint 45 connecting the front wheel drive motor 42 and the rear wheel drive motor 44.

The front wheel drive motor 42 and the rear wheel drive motor 44 are preferably connected in parallel as shown in FIG. In this case, there is an advantage that the wheels are idle and prevent the vehicle from moving or the power is transmitted to only one of the wheels by the pressure distribution of the working fluid.

In the related art, when there is a curvature on the ground, one wheel is lifted, and when one wheel is lifted, all of the working fluid moves only to the wheel drive motor lifted by the pressure gradient in the flow path. As a result, the working fluid is supplied only to the wheel-side driving motor lifted without the operating fluid supplied to the opposite drive motor, and only the wheel lifted by the wheel device is idle and the vehicle is not moved.

In a preferred embodiment of the present invention, the drive unit 40 is the front wheel drive motor 42 and the rear wheel drive motor 44 are connected in parallel, the front wheel drive motor 42 and the rear wheel drive motor 44 is a universal joint (45) Since the above-described conventional problem does not occur.

Specifically, in the preferred embodiment of the present invention, when one of the wheels is lifted as described above, the front wheel drive motor 42 and the rear wheel drive motor 44 are connected in parallel, as shown in FIG. 13. In addition, the working fluid is supplied to the wheel in contact with the ground at the same flow rate. Even when the working fluid is supplied, a difference occurs in the driving force between the drive motor to which the lifted wheel is connected and the drive motor to which both wheels are in contact with the ground, and the difference in driving power is offset by the universal joint 45 connecting the two drive motors. do. That is, the wheel on the other side of the wheel is rotated by the operation of the drive motor in contact with the wheel on the floor, because the wheel is moved because the wheel is moved in contact with the ground, the difference in the driving force is offset.

Hereinafter, the operating state of the driving unit 40 will be described with reference to FIGS. 7 and 13. First, as shown in FIG. 13, when the engine is driven, a piston pump is operated by the engine, and the working fluid is driven by the piston pump through the turning joint to the front wheel drive motor 42 and the rear wheel drive motor 44. To be discharged. When the front wheel drive motor 42 is driven by the working fluid, the front wheel drive shaft 11c is rotated as shown in FIG. 7, and the front wheel drive gear 11ca integrally formed on the front wheel drive shaft 11c is also the front wheel drive shaft 11c. Is rotated as follows. When the front wheel drive gear 11ca is rotated, the front wheel driven gear 11aa meshed with the front wheel drive gear 11ca is rotated, and the front wheel drive gear 11aa is integrally formed on the front wheel shaft 11a, so that the front wheel shaft 11a is rotated. When the front wheel shaft 11a is rotated, the front wheel 11b coupled thereto is rotated. The operation principle of the rear wheel 12b is rotated is the same as the front wheel 11b described above, and a detailed description thereof will be omitted.

As shown in FIG. 5, the steering unit 50 is provided with a pair spaced apart from the center portion of the front wheel shaft case 11 and has a front wheel steering actuator 51 having a front wheel input port 51a and a front wheel shaft case 11. The front wheel knuckle arm 52, which is respectively installed on both sides of the front side and is bolted to the front wheel 11b, the front wheel tie rod 53 connecting the front wheel knuckle arm 52, and the center of the rear wheel shaft case 12 A pair of rear wheel knuckle arms 54 are provided on both sides of the rear wheel steering actuator 54 having rear wheel input ports 54a and rear wheel shaft cases 12, and one side of which is bolted to the rear wheel 12b. 55, a rear wheel tie rod 56 connecting the rear wheel knuckle arm 55, a steering pump 57 and a hydraulic tank installed on the lower frame 10 installed on one side of the upper frame 20; 58, connected to the steering pump 57 and the hydraulic tank 58, the pressure oil from the steering pump 57 in accordance with the rotation of the steering handle (22b) to the steering fluid Rotary valve 59 to be discharged to the rotor, the first passage 60 connecting the rotary valve 59 and one side front wheel steering actuator 51, the other front wheel steering actuator 51 and one rear wheel steering actuator 54 The second passage 61 for connecting the (3), the other rear wheel steering actuator 54 and the third passage 62 for connecting the rotary valve (59).

Hereinafter, the operating state of the steering unit 50 will be described with reference to FIGS. 5 and 10. Specifically, the case in which the right turn as shown in Figure 10b will be described. When the driver rotates the steering wheel 22b in the right direction, the rotary valve 59 supplies the working fluid supplied from the steering pump 57 through the first flow path 60 to the left front wheel steering actuator (as shown in FIG. 10B). 51). The working fluid introduced through the front wheel port 51a of the front wheel steering actuator 51 is expanded to incline the left front wheel 11b to the right as shown in FIG. 10B. When the left front wheel 11b is inclined to the right, the front wheel tie rod 53 is pushed to the right and the right front wheel 11b is also inclined to the right.

The right front wheel 11b is inclined to the right to contract the right front wheel steering actuator 51, and the working fluid in the right front wheel steering actuator 51 moves to the left rear wheel steering actuator 54 through the second flow path 61. do. The left rear wheel steering actuator 54 is inflated by the moving working fluid, and the left rear wheel steering actuator 54 is inflated to tilt the left rear wheel 12b to the left. When the left rear wheel 12b is inclined to the left, the right rear wheel 12b is inclined to the left by the rear wheel tie rod 56, and the right rear wheel steering actuator 54 is contracted while the working fluid is right of the rotary valve 59. It flows into the rotary valve 59 through the rotary valve port 59a.

As described above, the preferred embodiment of the present invention has the advantage of maximizing the turning radius with a simple configuration by the above-described flow path structure and the front and rear wheel tie rods 53 and 56.

As shown in FIG. 11, the link unit 70 includes a link body 71 hinged to both sides of the boom 23 so as to be rotatable, and an attachment insertion protrusion 72 formed at an upper end of the link body 71. And at least one connection rod 73 for connecting the link body 71.

The link portion 70 is attached as the attachment insertion protrusion 72 formed in the link body 71 is simply fitted in the insertion protrusion support groove 81 formed in the attachment 80 to be described later, as shown in FIG. Since the attachment and detachment of 80 is made, there is an advantage that the attachment 80 such as the fork can be quickly attached and detached as shown in FIG. 12.

Attachment 80 is a device that is coupled to the link unit 70 to perform a variety of tasks, preferably using a bucket, fork, clamp, brush, and the like. As shown in FIG. 11, an insertion protrusion support groove 81 is formed at the upper side of the attachment 80 such that the attachment insertion protrusion 72 of the link unit 70 is inserted and supported at both sides thereof, and the link body 71 is formed at both sides thereof. The support wing 82 is formed so that the support closely.

The shock absorber 90 is installed between the lower frame 10 and the front wheel shaft case 11 to absorb shock applied to the vehicle body, as shown in FIG. 8, and is preferable to the front wheel shaft case 11. Preferably, the lower support member 91 is bolted and the lower support rod 91a is formed on the upper side, and the upper support member is preferably bolted to the lower frame 10 and the upper support member 92a is formed on the inner ceiling. 92, and one side is fixed to the bottom of the lower support member 91 and the other side is composed of an elastic body 93, such as a coil spring fixed to the ceiling of the upper support member 92.

As the present invention can be variously modified by those skilled in the art without departing from the scope of the claims, the technical protection scope of the present invention is not limited to the specific preferred embodiments described above. Do not.

1 is a perspective view showing a multi-purpose loader according to an embodiment of the present invention,

2 is a side view of the multipurpose loader shown in FIG. 1, FIG.

3 is a front view of the multipurpose loader shown in FIG. 1, FIG.

4 is a rear view of the multi-purpose loader shown in FIG. 1, FIG.

5 is a plan view of the multi-purpose loader shown in FIG. 1, FIG.

6 is a plan view illustrating a lower frame, a driving unit, a steering unit, and a link unit employed in the multipurpose loader shown in FIG. 1;

7 is an operating state diagram of the driving unit in FIG. 6;

8 is a rear view showing a state in which the lower frame employed in the multi-purpose loader shown in FIG. 1 is fixed to the front wheel shaft case by an impact buffer;

FIG. 9 is a rear view illustrating a state in which a lower frame employed in the multipurpose loader illustrated in FIG. 1 is fixed to a rear wheel case;

10 is an operating state diagram of a steering unit employed in the multipurpose loader shown in FIG. 1;

FIG. 11 is a side view illustrating a state in which a link unit employed in the multi-purpose loader shown in FIG. 1 is combined with an attachment; FIG.

FIG. 12 is a perspective view showing a state in which the attachment part is replaced with another attachment using the link unit shown in FIG. 11;

13 is a hydraulic circuit diagram of the multi-purpose loader shown in FIG. 1.

Explanation of symbols on the main parts of the drawings

1: Multi purpose loader 10: Lower frame

11: front wheel shaft case 11a: front wheel shaft

11aa: front wheel driven gear 11b: front wheel

11c: Front wheel drive shaft 11ca: Front wheel drive gear

12: rear wheel shaft case 12a: rear wheel shaft

12aa: Rear wheel driven gear 12b: Rear wheel

12c: Rear wheel drive shaft 12ca: Rear wheel drive gear

12b: rear wheel 12c: rear wheel drive shaft

12ca: Rear wheel drive gear 13: Rotating support shaft

13a: bearing 20: upper frame

21: rotating ring 22: cab

22a: hinge 22b: steering wheel

22c: Clamp 23: Boom

24: boom actuator 25: link unit actuator

30: upper frame pivot member 31: base shaft

31a: hydraulic oil inlet 32: housing

32a: hydraulic oil outlet 40: drive unit

41: front wheel coupling 42: front wheel drive motor

43: rear wheel coupling 44: rear wheel drive motor

45: universal joint 50: steering

51: front wheel steering actuator 51a: front wheel port

52: front wheel knuckle arm 53: front wheel tie rod

54: rear wheel steering actuator 54a: rear wheel port

55: rear wheel knuckle arm 56: rear wheel tie rod

57: steering pump 58: hydraulic tank

59: rotary valve 59a: rotary valve port

60: first euro 61: second euro

62: third euro 70: link part

71: link body 72: attachment insertion protrusion

73: connection rod 80: attachment

81: insertion protrusion support groove 82: support wing

90: shock absorber 91: lower support member

91a: lower support rod 92: upper support member

92a: upper support rod 93: elastic body

Claims (7)

A lower frame having a front wheel case coupled to the front end rotatably and a rear wheel case coupled to the rear end rotatably; An upper frame coupled to an upper side of the lower frame and provided with a cab equipped with a steering wheel at an upper portion thereof; An upper frame pivot member installed between the upper frame and the lower frame to rotate the upper frame with respect to the lower frame; A driving unit installed in the lower frame to drive the front and rear wheels; A steering part installed at the lower frame to rotate the front and rear wheels according to the rotation of the steering wheel; A link unit having a link body coupled to an end of the boom installed on the upper frame and an attachment insertion protrusion formed at an end of the link body; And An attachment protrusion supporting groove is formed on an upper side of the link insertion attachment protrusion to support the link portion, and an attachment on which the support wings are formed to support the link body. The driving unit includes a front wheel coupling connected to the front wheel driving shaft of the front wheel case, a front wheel driving motor coupled to the front wheel coupling to transfer power to the front wheel driving shaft, and a rear wheel coupling connected to the rear wheel driving shaft of the rear wheel case; And a rear wheel drive motor coupled to the rear wheel coupling for transmitting power to the rear wheel drive shaft, and a universal joint connecting the front wheel drive motor and the rear wheel drive motor. The method of claim 1, A lower support member installed on an upper side of the front wheel case of the lower frame and having a lower support rod on one side, an upper support member installed on a lower side of the lower frame and having an upper support rod on one side, and one side of which is fixed to the lower support member And the other side further comprises an impact buffer having an elastic body fixed to the upper support member. The method of claim 2, The link body of the link unit is characterized in that the insertion protrusion connecting rod is further formed. 4. The method according to any one of claims 1 to 3, And the upper frame pivot member is a turning joint. delete The method of claim 1, The steering unit includes front and rear wheel steering actuators respectively installed on the front and rear wheel shaft cases, front and rear wheel knuckle arms rotatably installed on the front and rear wheel shaft cases, and one side of which is connected to the front and rear wheels, and the front wheel knuckle arms. A front wheel tie rod connecting the rear wheel, a rear wheel tie rod connecting the rear wheel knuckle arm, a steering pump and a hydraulic tank installed on the upper frame, the steering pump and the hydraulic tank connected to the steering wheel A rotary valve for discharging the hydraulic oil from the steering pump to the steering actuator, a first passage connecting the rotary valve and one front wheel steering actuator, a second passage connecting the other front wheel steering actuator and one rear wheel steering actuator, and the other side And a third flow path connecting the rear wheel steering actuator and the rotary valve. The method of claim 6, The front wheel drive motor and the rear wheel drive motor of the drive unit is characterized in that connected in parallel.

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