JPH0557015U - Working machine with dozer - Google Patents

Abstract

(57) [Summary] [Structure] The power source 10 is mounted on the crawler traveling device 40.
In a working machine equipped with a handle 21 at the rear part of a machine body suspended from and a dozer 31 at the front, a power source 10 is mounted to a traveling frame 41 equipped with a crawler traveling device 40, and a handle 21 and a dozer 31 are provided. Main frame 1
A spring member 71 is pivotally connected to the rear portion so that the dozer 31 can be raised by a push-down operation of the handle 21 so as to swing, and a spring member 71 that reduces a push-down operation force of the handle 21 is provided between the traveling frame 41 and the main frame 1. To do. [Effect] The handle for pushing up the main frame 1 by the pushing operation of the handle 21 to hold the dozer 31 in the raised position and for raising the dozer 31 integrated with the power source 10 side. The pressing operation load of 21 is reduced by the urging force of the spring member 71, and the operability can be improved.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a walking type work machine with a dozer.

[0002]

[Prior Art]

 A walk-behind snow remover equipped with a dozer has been put into practical use, and it is disclosed in Japanese Utility Model Publication No. 55-32902 that a link mechanism that raises the dozer by the pushing action of the handle when moving backward or moving is provided. It is known from JP-A-63-171908.

[0003]

[Problems to be solved by the device]

 In this type of walk-type working machine with a dozer, when climbing over a step such as a curb, conventionally, only the rotational drive of a rubber crawler was relied upon, and improvement of the step climbing performance was desired. Then, in order to easily get over the step, it is sufficient to push the handle down to change the posture of the aircraft upward, but the overall weight of the aircraft equipped with the engine, the crawler traveling device and the dozer is considerably heavy, and such a large operation is required. It is disadvantageous in handling that the load is required even when the dozer is raised.

Therefore, an object of the present invention is to make it possible to raise the dozer integrated with the power source side with respect to the crawler traveling device by depressing the handle, and reduce the operation load to improve operability. Another objective is to provide a work machine with a dozer that can improve the performance of climbing over bumps.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention provides a work machine equipped with a power source and a handle at the rear of a body on which a crawler traveling device is suspended, and a dozer in front of the machine. The main frame equipped with the power source and equipped with the handle and the dozer is pivotally connected to the traveling frame at the rear so that the main frame is swingable so as to raise the dozer by pushing down the handle. At the same time, a spring member is installed between the traveling frame and the main frame so as to reduce the pushing-down operation force of the handle. Specifically, the main frame is pivotally connected to the traveling frame so as to be swingable around a rear drive shaft of the crawler traveling device, and a weight member is coupled to a rear drive wheel of the crawler traveling device. is doing.

[0006]

[Action]

 First, with respect to a traveling frame equipped with a crawler traveling device, a main frame equipped with a power source and equipped with a rear handle and a front dozer is swingable at the rear so that the dozer can be raised by pushing down the handle. Since it is pivotally connected, the dozer can be held in the raised position when the vehicle is moving backwards or moving, by the pushing action of the handle that causes the main frame to move forward and up. A spring member is installed between the traveling frame and the main frame to reduce the force of pushing down the handle, so the load for pushing down the handle for raising the dozer, which is integral with the power source, can be applied to the spring member. It can be reduced by the urging force of and the operability can be improved. Further, since the weight member for improving the crawler running performance is provided at the center of the swing shaft, it has little influence on the load during the ascending operation.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 to 4 showing a snow remover with a dozer as an example of a working machine with a dozer to which the present invention is applied, 1 is a main frame, 10 is an engine unit as a power source, 21 is a handle, 31 is a dozer, and 40 is a crawler. A traveling device, 41 is a traveling frame, 51 is a rubber crawler, 61 is a stopper mechanism, and 71 is a spring member.

As shown in FIG. 5, the main frame 1 is formed by connecting left and right side plates 2 and 2, a front cover 3 serving also as a front fan cover, and a rear cover 4 on a rear portion with bolts and nuts. The engine unit 10 is box-shaped, and the engine unit 10 is mounted and supported on an engine base 11 that is bolt-nut-coupled to the front portions of the side plates 2 and 2. The rear portions of the dozer supporting arms 5 and 5 are bolt-nut-coupled to the lower portions of the side plates 2 and 2, and a bridge 6 is installed at an intermediate portion between the dozer supporting arms 5 and 5.

As shown in FIG. 4, the engine unit 10 is a hydraulic transmission in which a crankshaft 12 is projected forward and is arranged inside the main frame 1 from the crankshaft 12 via a belt pulley mechanism 13. Power is transmitted to the input shaft 15 protruding forward of the (HST) 14, 16 is a cooling fan, and 17 is a belt cover. As shown in FIG. 7, a transmission 18 is coupled to the rear portion of the HST 14, and a transmission 18 having drive shafts 19 and 19 protruding left and right is bolted to the lower portions of the side plates 2 and 2 of the main frame 1. Has been done.

The handle 21 is composed of a pair of left and right members having a lower end 22 joined to the upper portion of the rear side surface of the side plate 2 of the main frame 1 by a bolt and nut, and a grip portion 23 provided at an upper end extending rearward and upward. 24 is an operation plate, and 25, 26 and 27 are various operation levers.

As shown in FIG. 6, the dozer 31 is provided with side plates 33, 33 on the left and right sides of the main body 32 and an edge 34 along the lower edge of the main body 32. The front ends of the dozer support arms 5 and 5 are pivotally connected to the lower portion. The stay 7 is pivotally connected between the upper center of the rear surface of the main body 32 and the front cover 3 of the main frame 1.

As shown in FIG. 7, the crawler traveling device 40 includes a traveling frame 41 having a rectangular frame shape in a plan view formed by connecting left and right side plates 42, 42, a front bridge 43, and a rear bridge 44 with a bolt and nut, and the left and right thereof. Drive sprocket 45, 45, which is a drive wheel provided in the vehicle, driven wheels 47, 47 in front of the drive sprocket, and rubber crawlers 51, 51 mounted on them.

As shown in FIG. 7, the sprocket shaft 46 of the drive sprocket 45 is supported in the bearing circular hole 42 a at the rear portion of the side plate 42 of the traveling frame 41, and the sprocket shaft 46 of the transmission 18 is accommodated in the sprocket shaft 46. The drive shaft 19 is inserted and integrally connected. In this manner, the main frame 1 is pivotally connected to the traveling frame 41 so as to be swingable around the rear drive shaft 19.

The idle wheel shaft 48 including the left and right driven wheels 47, 47 is axially supported by the position adjusting slots 42b, 42b at the front portions of the side plates 42, 42 of the traveling frame 41. A drum-shaped weight member 55 is connected to the outer surface of the drive sprocket 45 by a bolt and nut.

As shown in FIGS. 4 and 6, the stopper mechanism 61 has a lower link 62 pivotally connected to the central portion of the front bridge 43 of the traveling frame 41 and a central portion of the bridge 6 between the dozer support arms 5 and 5. The upper link 63 and the upper link 63 that are fixedly coupled are pivotally connected to each other, and a locking claw portion 64 for preventing a dead point overrunning is provided at the tip of one of the links 63. Then, as shown in FIGS. 4 and 5, behind the drive shaft 19 which is the swing center of the main frame 1 with respect to the traveling frame 41, the central portion of the rear cover 4 of the main frame 1 and the central portion of the rear bridge 44 of the traveling frame 41. An extension coil spring 71, which is a spring member, is stretched between the section and the section.

The operation of the snow remover with a dozer having the above configuration will be described below. First, as shown in FIG. 1, this snow remover with a dozer is moved forward by rotationally driving the left and right rubber crawlers 51, 51 with the dozer 31 grounded, for example, a gas station or a parking lot of a store. In this, snow removal work can be performed easily.

Further, since the crawler traveling device 40 is provided with the drum-shaped weight members 55, 55 on the outer surfaces of the left and right drive sprockets 45, 45, it is excellent in running performance by the rubber crawlers 51, 51. At the time of retreating or moving, the grips 23, 23 of the left and right handles 21, 21 are pushed down, and due to the pushing action thereof, as shown in FIG. Then, the main frame 1 is swung to a forwardly raised posture, and the dozer 31 provided in front of the main frame 1 via the dozer supporting arms 5 and 5 and the stay 7 is held at the raised position.

Moreover, between the central portion of the rear cover 4 of the main frame 1 and the central portion of the rear bridge 44 of the traveling frame 41, behind the drive shaft 19 which is the swing center of the main frame 1 with respect to the traveling frame 41. Since the tension coil spring 71 is stretched, the pushing load of the handles 21 and 21 for raising the dozer 31 integrated with the main frame 1 mounting the engine unit 10 as shown in FIG. It can be reduced from the tension urging force of 71. That is, the raising operation of the dozer 31 integrated with the main frame 1 can be easily performed.

A lower link 62 pivotally connected to the central portion of the front bridge 43 of the traveling frame 41 and an upper link 63 pivotally connected to the central portion of the bridge 6 between the dozer supporting arms 5 and 5 are pivotally connected to each other. Since the stopper mechanism 61 is provided, the dead point crossing prevention locking claw portion 64 provided at the tip of the upper link 63 is locked at the tip of the lower link 62 by further pushing down the handles 21 and 21. After that, the traveling frame 41 is connected to the main frame 1 via the stopper mechanism 61. Therefore, when climbing over a step such as a curb, as shown in FIG. 3, the crawler traveling device 40 is also changed in posture to move forward to easily climb over the step.

In the above embodiments, the description has been given based on the snow remover with a dozer, but the present invention is also applicable to a work machine with a dozer for removing sand. Incidentally, as for the stopper mechanism, it is needless to say that any structure other than the embodiment can be appropriately adopted, and the specific detailed structure and the like can be appropriately changed.

[0021]

[Effect of the device]

 As described above, according to the working machine with a dozer of the present invention, the main frame having the rear handle and the front dozer with the power source mounted is pushed down to the traveling frame having the crawler traveling device. Since the dozer can be swung so that it can be raised by operation, it is pivotally connected at the rear part, so when moving backward or moving, the dosing action of the handle pushes the main frame forward and raises the dozer in the raised position. In addition, since a spring member was installed between the traveling frame and the main frame to reduce the force for pushing down the handle, the load for pushing down the handle for raising the dozer integrally with the power source side was installed. The urging force of the spring member reduces the operability and the operability can be improved. Further, if a stopper mechanism that restricts the swing angle of the main frame with respect to the traveling frame is provided, it is possible to cope with the improvement in the performance of climbing over a step. Furthermore, since the weight member for improving the crawler running performance is provided at the center of the swing shaft, it has little influence on the load during the lifting operation.

[Brief description of drawings]

FIG. 1 is a schematic side view showing a snow remover with a dozer as an example of a working machine with a dozer to which the present invention is applied.

FIG. 2 is a schematic side view showing a raised state of a dozer.

FIG. 3 is a schematic side view showing a state in which the crawler traveling device is moved forward.

FIG. 4 is a side view showing a frame structure and the like by breaking a main part.

FIG. 5 is an exploded perspective view of main frame side components.

FIG. 6 is an exploded perspective view of related parts such as a dozer, its support arm, and a traveling frame.

FIG. 7 is an exploded perspective view of a crawler traveling device, its frame, and related parts such as a transmission.

[Explanation of symbols]

1 ... Main frame, 10 ... Power source, 19 ... Drive shaft, 21 ...
Handle, 31 ... Dozer, 40 ... Crawler traveling device, 4
DESCRIPTION OF SYMBOLS 1 ... Running frame, 45 ... Driving wheel, 51 ... Rubber crawler, 55 ... Weight member, 61 ... Stopper mechanism, 71 ...
Spring member.

Claims (2)

[Scope of utility model registration request] 1. A working machine equipped with a handle at a rear part of a machine body on which a crawler travel device is suspended by mounting a power source, and a dozer in front of the machine body, with respect to a travel frame provided with the crawler travel device, A main frame equipped with the power source and provided with the handle and the dozer is pivotally connected at the rear part so as to be swingable so as to raise the dozer when the handle is pushed down, and the traveling frame and the main frame are connected. A working machine with a dozer, characterized in that a spring member for reducing the pressing operation force of the handle is installed between the two. 2. The main frame is pivotally connected to the traveling frame so as to be swingable around a rear drive shaft of the crawler traveling device, and a weight member is coupled to a rear drive wheel of the crawler traveling device. The working machine with a dozer according to claim 1, wherein: