JPS63510A - Snow removing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Field of Industrial Application) This invention relates to a snow blower, specifically, an electric power and a blower are connected to an engine via a dry clutch, and the dry clutch and a transmission mechanism are separated by a partition wall. This invention relates to a snow blower stored in an enclosed storage space.

(Prior art) Snow blowers, especially small snow blowers, use an Oi engine to drive a crawler, etc., and use this engine to drive an auger and a blower to shovel and remove snow. .

Conventionally, as this type of snow removal machine, Japanese Patent Application Laid-Open No. 59-21781
The one described in Publication No. 4 is known. This snow blower has an engine that is connected to a traveling means such as a crawler through a main transmission, etc., and to an electric power source and a blower through a belt with a tensioner. It is used to remove snow.

(Problems to be solved by this invention) However, 1
In such conventional snow blowers, the auger and blower are connected to the engine by a belt with a tensioner, and the tension of this belt is Jfl by the tensioner to transmit power to the auger etc. There are problems in that tension adjustment and belt replacement must be performed frequently, which requires a lot of maintenance, and there is also a large distance between the engine crankshaft and the shaft that transmits driving force to the auger, etc. However, there was a problem in that the overall size of the device was increased.

This invention was made in view of the above problems, and provides a snow blower in which an auger and a blower are connected to an engine via a dry clutch, and a dry clutch and a transmission mechanism are arranged across a bulkhead, thereby simplifying maintenance thereof. The aim is to achieve miniaturization as well.

(Means for Solving the Problems) The present invention provides a snow blower in which an engine drives a traveling means through a transmission mechanism to travel, and the engine drives an auger and a blower to shovel and remove snow. , the engine 7 and the blower are connected to the engine via a dry clutch, and the transmission mechanism and the soft clutch are arranged separated by a partition wall, and the transmission case 14 includes the transmission case of which the partition wall is a part. Further, the gist is that the dry clutch is housed in a clutch housing of which the drawing wall is a part.

(Function) According to the snow blower according to the present invention, since the engine, auger, and blower are mechanically connected via a dry clutch, there is no need for tension management, etc., as with conventional belt-based devices, and maintenance is unnecessary. is easy. Further, since a belt is not used, and the dry clutch and the speed change mechanism are arranged with a partition wall between them and are housed in a transmission case and a clutch housing, each of which has the partition wall as a part, it is possible to achieve miniaturization.

(Example) Embodiments of the present invention will be described below based on the drawings.

1 to 8 represent a snow blower according to an embodiment of the present invention, FIGS. 1, 2, 3, and 4 represent the whole, and FIGS. 5, 6, and 7 FIG. 8 and FIG. 8 are partially enlarged sectional views.

In Figure 1, (If) is the frame of the aircraft,
A handle (12) is set on the upper end of the frame (11) that curves upward, and an engine (13) is mounted on the frame (11). Note that (72) is the frame (11) near the handle (12).
) Similarly to clutch lever 1 attached to (99)
is a gear shift lever supported by the frame (11) near the handle (12). In the engine (13), a transmission case (15) housing a transmission mechanism (14) in a crankcase (13a) is fastened with bolts (16), and a drive gear (17) is fixed inside this transmission case (15). The crankshaft (13b) protrudes.

The transmission case (15) is attached to the crankshaft (13).
b) Two split cases (15a) split in the longitudinal direction
) and (15b) are joined together. As shown in FIGS. 5 to 8, the input shaft (1B) of the transmission mechanism (14) is located inside the transmission case (15).
), an intermediate shaft (19), and an output shaft (20) are each supported in parallel and rotatably. As shown in detail in FIG. 5, the input shaft (18) has a driven gear (21) meshing with the drive gear (17) of the crankshaft (+3b) and a drive sprocket adjacent to the driven gear (21).
(22) are provided to rotate together, and the left end in the figure is connected to an auger and a blower via a friction multi-plate dry clutch which will be described later.

The intermediate shaft (19) is rotatably provided with a driven sprocket 7 (24) having a chain (23) bridged between it and the drive sprocket (22) of the input shaft (18). The sleeve (2B) of the latch (25) running to the right in FIG.
A forward speed change gear (27) and a reverse speed change sprocket (28) are attached to the left side of the figure. The driven sprocket (24) has an engaging portion (24a) with unevenness formed on the end surface on the sleeve (26) side.
In G), a retaining part (26a) that can be fitted with the engaging part (24a) of the driven sprocket (24) is formed on the end face on the driven sprocket (24) side. This sleeve (2
8) is a groove (28b) on the outer periphery as shown in FIG.
The tip of the clutch fork (30) fixed to the shift shaft (28) is fitted into the clutch fork (30).
) and moves in the axial direction on the intermediate shaft (19) to fit the engaging portion (213a) into the engaging portion (24a) of the driven sub-rotate (24). shift shirt) (29
) is connected to an operation lever, etc. (not shown). These fork (30), sleeve (26), etc. constitute a latch (25) on which it runs.

The forward speed change gear (27) is provided on the intermediate shaft (18) with splines so as to be movable in the axial direction, and is connected to the reverse speed change sprocket (
28) is rotatably provided on the intermediate shaft (19).

The forward speed change gear (27) is integrally formed with a large diameter high speed gear (27a) and a small diameter low speed gear (27b), and also has an engaging protrusion (27c) on the end surface on the backward speed change sprocket (28) side. ) is formed. As shown in detail in FIG. 7, this forward gear (27) is a high speed gear (2?a).
A groove (27d) is formed between the gear and the low speed gear (27b), and a shift fork (32) fixed to the shift rod (31) is fitted into the groove (27d). The shift rod (31) is the transmission, engine (15)
The intermediate shaft (19) is supported so as to be movable in the axial direction substantially parallel to the intermediate shaft (19), and is connected to a speed change lever (not shown). The shift fork (32) responds to the speed change lever via the shift rod (31) and drives the forward speed change gear (27) as shown by the dashed line in FIG. In addition, (33) is the shift rod (
31) is a pole that is biased by a spring (34) toward a plurality of grooves (31a) formed on the left side of the figure, and fits into the grooves (31a) in response to a gear shifting operation to provide a sense of moderation. occurs.

The reverse gearshift gear (28) is the forward gearshift gear (28).
7) side end face of the forward speed change gear (27).
7c) and an engaging convex portion (28a) that can be engaged with is formed. When the forward gear (27) moves to the leftmost position, the engagement protrusion (28a) of the reverse gear (28) engages the engagement protrusion (28) of the forward gear (27).
27c) and rotate together with the forward speed change gear (27).

The output shaft (20) includes a low speed counter gear (35) that can mesh with the low speed gear (2?b) of the forward speed change gear (27), a high speed counter gear (36) that can also mesh with the high speed gear (27a), and A reverse transmission driven subblock (38) with a chain (37) bridged between it and the reverse transmission tin block (28) are provided to rotate together, and
At the left end of the figure is a worm (20a) that meshes with a worm wheel (40) installed on the driving shaft (39).
) is formed. When the forward speed change gear (27) moves from the illustrated position to the right in the figure, the low speed counter gear (35) meshes with the low speed gear (27b) and engages with the high speed counter gear (3B).
) meshes with the high speed gear (27a) when the forward speed change gear (27) moves from the illustrated position to the left in the figure. In addition, the above-mentioned transmission mechanism (14) can adopt two forward speeds (high and low speed) and one reverse speed according to the movement of the forward speed change gear (27) by operating the speed change lever (99), and the forward speed change gear (
The illustrated position of 27) represents the neutral position.

As shown in Figure 2, the drive shaft (38) has drive sprockets (41) for crawlers at both left and right ends.
are provided, and a crawler (43) serving as a traveling means is bridged in the rearward direction between each driving sprocket (41) and driven sprocket (42) on both sides of the frame (11). The driven subrocket (42) is a bladder suspended on the frame (II) as shown in Fig. 1.
(44) A long hole (44) extending in the front-rear direction is formed in the
a) is attached to the axle (45) that passes through it. The axle (45) can be moved in the long hole (44a) to change its position in the longitudinal direction, and is fixed in the longitudinal direction by a bolt (4B) screwed into the bracket (44). Note that (47) is a lock nut screwed onto the bolt (4B).

Four parts (48) are formed on the outside of the front part of the transmission case (15) and are recessed rearward and open at the front, and this recessed part (48) is fastened to the front end part of the transmission case (15) with bolts (49). The front opening is closed by the cover (50) to define a storage space in which a friction multi-plate dry clutch (51) is stored. These recesses (48) in the transmission case (15)
The drawing wall (48a) and the cover (50) constitute the clutch housing (52)6, that is, the drawing wall <48a) is -g! of the transmission case (15). ! Also constitutes a part of the clutch housing (52).

The dry clutch (51) is connected to the transmission case (
15), the input shaft (18) passing through the partition wall (48a) and the output shaft (5) connected to the auger and blower.
3) are connected so that they can be connected and separated.

As shown in FIG. 5, this dry clutch (51) has a clutch hub (55) fitted and fixed to the outer periphery of a sleeve (54) that is attached to rotate integrally with the input shaft (18). Crachi hub (55) is sleeve (54)
a boss portion (55a) that fits into the boss portion (55a); a disk portion (55b) extending radially outward from the boss portion (55a); and a cylinder extending axially from the outer peripheral end of the disk portion (55b). Part (5
5c). This clutch hub (55)
has a plurality of drive plates (56) in the cylindrical part (55c).
) is provided so that it can be displaced only in the axial direction so that it rotates together, and a piston (57) is provided on the outer periphery of the boss (55a).
are fitted so as to be slidable in the axial direction. The drive plates (56) are arranged alternately in the axial direction with a plurality of driven plates (59) which are displaceable in the axial direction so as to rotate together with the clutch drum (5B), and are arranged alternately in the axial direction, and are arranged alternately in the axial direction.
) and make frictional contact. Clutch drum (5
8) is riveted through the rubber elastic body (60) in the radial direction)
(81) is connected to the output shaft (53).

The piston (57) has a drive plate (5
6) and driven play) (5f3) are set, and a plurality of engaging pieces (57b) are integrally formed at regular intervals in the direction of one rotation. These engagement pieces (57b) slidably pass through the disc portion (55b) of the clutch hub (55) in the axial direction, and extend through the engine (1).
3), and an annular retainer (63) is fixed to the engine (13) side end by a pin (82). This retainer (B3) and clutch hub (5
A plurality of return springs (64) are compressed between the engagement piece (57b) and the piston (5).
7b) is urged in the direction away from the drive play (5B) on the left in the figure.

Further, an engagement piece (83a) is formed on the retainer (83), and a shifter (B5) is arranged so as to be able to come into contact with this engagement piece (83a). The shifter (65) is a cylindrical part (48) of the transmission case (15) that extends integrally from the partition wall (48a) and into which the input shaft (18) is loosely inserted.
48b) is slidably inserted, and a fork (66) is fitted into a groove (85a) formed on the outer periphery of the fork.

As shown in detail in FIG. 8, the fork (68) is provided on the rotation shaft (87a) of the release lever (67) supported by the transmission case (15) and responds to the release lever (67). The release lever (67) is.

A spring (6 days) is compressed between one end and the transmission case (15), and the other end is a buffer spring (6 days).
69) and the handle (12) via the cable (70)
The clutch operating lever (72) is connected to the clutch operating lever (72). This release lever (67) releases the spring (88) when the clutch is operated/< (72) is operated.
(7) Rotation shaft (87) clockwise in Figure 8 against elastic force.
a) to move the chic (65) to the right in FIG.
8), the shifter (65) presses the retaining piece (57b).

The dry clutch (51) shown in FIG. 5 has an upper half in a connected state and a lower half in a disconnected state. That is, when the shifter (85) separates from the engagement piece (57b), the return spring (64) biases the piston (57) to the right in the figure, causing the drive plate (58) and the driven plate (59 ) to connect the input shaft (18) and output shaft (53), but the chic (85) is pressed against the engagement piece (5
711), the piston (57) moves to the left in the figure against the elastic force of the return spring (64), and the input shaft (
1 day) and the output shaft (58).

As shown in Fig. 1, the output shaft (53) of the dry clutch (51) is equipped with a drive shaft (73) for driving the auger and prower.
) are connected. The drive shaft (73) is the output shaft (53
) and a first solid shaft (73a) having one end connected to the force/< -(50) and rotatably passing through the force/<-(50), and a worm (71a).
is formed and the second solid shaft (73b) is rotatably supported by the auger bra (74), and these first solid shafts (73a) and second solid shafts (73b) are extrapolated. and a hollow shaft (73c) for connecting. A blower (75) is fixed to the outer periphery of the end of the hollow shaft (73c) on the first solid shaft (?3a) side, and the second solid shaft (?3a) is fixed to the outer periphery of the hollow shaft (73c).
73b), the worm (71a) is rotatably supported by the auger drive shaft (74).
It meshes with the worm wheel (71b) fixedly attached to the worm wheel (76).

As shown in detail in FIG. 3, the blower (75) is housed in a blower housing (77) that is integrated with the cover (50) described above. The blower housing (77) has an opening 1- at the upper side and a discharge duct (78) at the opening end.
(see Figure 1) is rotatably provided. In addition, (1
00) is a handle for adjusting the inclination (snow throwing distance) of the discharge duct (78), this handle (100) is supported by the frame (11), and the mt end is connected to the discharge duct (78) through a worm gear mechanism. 78).

As shown in detail in FIG. 4, the auger drive shaft (78) has auger assemblies (79) fixed to both sides of the worm wheel (71b).

These auger assemblies (79) each include three blades (80) each spirally attached to the auger drive shaft (7B).
), the front end is open and the rear end is housed in an auger cover (81) fixed to the aforementioned blower housing (77).

Next, the operation of this embodiment will be explained.

This snow blower runs by driving a crawler (43) with the power of the engine (+3), and also drives an auger (79) with the power of the engine (13) to shovel snow and operates a blower (75). The snow is removed by driving. That is, the latch (25) for running is connected, the transmission mechanism (14) is operated to a high or low forward gear or a reverse gear to drive, and the clutch operating lever (72) is connected.
) to connect the dry clutch (51), the auger (79) and blower (75) are connected to the engine (+3), and these auger (79) and blower (75) plow snow. . This snow blower can reliably transmit and cut off power to the auger (79) and blower (75), without causing so-called grinding, and without causing the clutch operation lever (75).
The auger (79) no longer rotates after the shutoff operation in 2).

In addition, this snow blower is equipped with a dry type cracker 2,000 (51), an engine (13), an auger (78), and a blower (75).
), it does not require regular maintenance at short intervals unlike conventional belt tensioners.
Maintenance work can be simplified, and the distance between the shafts can be reduced to lower the ground clearance of the engine (13).

Furthermore, in this snow blower, the transmission mechanism (14) and the dry clutch (51) are housed in the transmission case (15) and clutch housing (52), which share the partition wall (48a). Further miniaturization can be achieved. Furthermore, the drive shaft of the crawler (43) (
39) is connected to the output shaft (2o) of the transmission mechanism (14) by a worm gear mechanism, maintenance can be further simplified.

(Effects of the Invention) As explained below, according to the snow blower according to the present invention, the auger and blower are connected to the engine by a dry clutch, and the dry clutch and the transmission mechanism are separated by both walls. Since it is housed in a case that includes the picture wall as a part, maintenance can be simplified and it can be made smaller.

[Brief explanation of the drawing]

1 to 8 show a snow blower according to an embodiment of the present invention, in which FIG. 1 is an overall side sectional view, FIG. 2 is a front sectional view showing the crawler portion in detail, and FIG. 3 is a front sectional view showing the crawler portion in detail. 4 is a front sectional view showing the auger part in detail, FIG. 5 is a side sectional view of the transmission mechanism and dry clutch, and FIG. FIG. 7 is an enlarged sectional view of the transmission mechanism portion, and FIG. 8 is an enlarged sectional view of the dry clutch portion. 11... Frame 13... Engine 13
a...Crank case 13b...Crank holder 14
...Transmission mechanism 15...Transmission case 18...Input JAI+ 20...Output shaft 25...Latch for running 43...Crawler 4
8a... Wall 50... Cover 51.
...Dry clutch 52...Clutch 53...
Output shaft Housing 73... Drive shaft 75... Proar 76... Auger drive shaft 77... Blower housing 79... Auger assembly (auger) 81... Auger cover

Claims (1)

[Scope of Claims] A snow blower in which an engine drives a traveling means through a transmission mechanism to drive the machine, and the engine drives an auger and a blower to shovel and remove snow, the auger and the blower being operated by a dry clutch. The speed change mechanism and the dry clutch are arranged to be separated from each other by a wall, and the speed change mechanism is placed inside a transmission case of which the wall is a part, and the speed change mechanism is connected to the engine through a A snow blower characterized in that the dry clutch is housed in a clutch housing.