JPS63508A - 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 (Industrial Application Field) This invention relates to a snow blower, more specifically, a rotating shaft that transmits power to an auger and a blower is connected to an engine via a clutch, and a cover that covers the auger and blower is connected to the engine through a clutch. The present invention relates to a snow blower which is fixed by a bolt passing through the rotating shaft in the axial direction, and whose cover is assembled in the same direction as the fastening direction, thereby improving workability.

(Prior Art) A snow blower, particularly a small snow blower, uses a single engine to drive a crawler or the like to run, and this engine also drives 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 auger and a blower through a belt with a tensioner, so that it can travel, shovel snow, and remove snow using the power of a single engine. This is what we do.

(Problem to be solved by this invention) However,
In such conventional snow blowers, the auger and blower are connected to the engine by a heddle with a tensioner, and the tension of the belt is adjusted by the tensioner to transmit power to the auger, etc. There was a problem in that tension adjustment and belt replacement had to be carried out frequently, and maintenance was complicated.

In addition, in this snow blower, as shown in FIG. 9, the auger (100a) and blower (101) are
2), the cover (103) in which the auger (IQOa) and blower (101) are housed is attached to the drive shaft (1) of the auger (100a) and blower (101).
After assembling the cover (103) from the axial direction of
A tightening hole (105) formed in the radial direction at the end of the fuselage (102) side and a blower (101) of the fuselage (102)
The problem is that the cover (103) must be fastened to the fuselage (102) by inserting bolts into the tightening holes (10B) formed in the radial direction at the side ends, making the assembly work difficult. was there. In Fig. 9, (10?) is the engine, (108) is the pulley provided on the crankshaft (109) of the engine (107), (11G) is the pulley provided on the rotating shaft (104), and (11G) is the pulley provided on the rotating shaft (104). 111) represents a belt bridged between pulleys (+08).

This invention was made in view of the above-mentioned problems.
The purpose of the present invention is to provide a snow blower in which the direction in which the cover of the auger and blower are assembled to the machine body matches the direction in which they are fastened, thereby simplifying its maintenance and improving the workability of the assembly work.

(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. , a drive shaft that transmits power to the auger and blower is connected to the engine via a clutch, and
The blower is composed of a plurality of blades that are divided in the rotational direction and protrude in the radial direction, and a cover that the drive shaft passes through and covers the auger and the blower is inserted from the auger side around the axis of the drive shaft. The gist is that it is fixed with a bolt that penetrates in the axial direction.

(Function) According to the snow blower according to the present invention, since the engine, auger, and blower are connectable and disconnectable via the Clara--, inspections for maintenance are shortened, unlike conventional belts. There is no need to perform it periodically, making maintenance easier. Then, the cover is assembled from the axial direction of the drive shaft to the machine body or a stationary member such as a clutch housing in which the clutch is housed, and a bolt passing through the cover parallel to the drive shaft is inserted between the blades of the blower. It is fastened and fixed using a tool. Therefore, the work of assembling the cover is easy and the number of man-hours can be reduced.

(Example) Hereinafter, embodiments of the great invention will be described based on the drawings.

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

In Figure 1, (11) is the frame of the aircraft,
A handle (12) is set on the upper end of the frame (11) that curves upward, and one engine (13) is placed on the frame (11)k. In addition, (72) is the frame (11) near the handle (12)
Similarly to the clutch lever 1 supported by the clutch lever 1, (93) is a gear shift lever supported by the frame (11) near the handlebar (12). The engine (13) has a crankcase (
A transmission case (15) housing a transmission mechanism (14) in the transmission case (13a) is fastened with a pole (1B), and a crankshaft (13b) with a drive gear (17) fixed inside the transmission case (15). It stands out.

The transmission case (15) is attached to the crankshaft (+3
b) Two split cases (15a) split in the longitudinal direction
), (15b) are joined together. As shown in FIGS. 5 to 8, inside this transmission case (15), the input shaft (+8), intermediate shaft (19), and output shaft (20) of the transmission mechanism (14) are parallel and rotating, respectively. freely supported. As detailed in Figure 5,
The input shaft (18) includes a driven gear (21) that meshes with the drive gear (17) of the crankshaft (13b) 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 the auger and the blower via a friction multi-plate dry clutch, which will be described later.

The intermediate shaft (19) is rotatably provided with a driven sprocket (24) with a chain (23) bridged between it and the drive sprocket (22) of the input shaft (18). The sleeve (26) of the latch (25) running to the right in FIG. 5 of (21) is attached by a spline, and the forward speed change gear (27) and the driven sprocket (24) are attached to the left of FIG. A reverse gear shift block (28) is attached. The driven sprocket (24) is formed with an engaging portion (24a) having unevenness on the end face on the sleeve (26) side, and similarly, the sleeve (26) is formed with the driven sprocket (24) on the end face on the driven sprocket (24) side. An engaging portion (26a) that can fit with the engaging portion (24a) of the sprocket (24) is formed. 28) on the outer periphery, as shown in Fig. 6.
213b), the tip of a clutch fork (30) fixed to the shift shaft (29) is fitted, and driven by the clutch fork (30), moves axially on the intermediate shaft (19) to engage the engagement portion. (26a) as the driven sprocket) (
24) fits into the engaging portion (24a). The shift shaft (29) is connected to an operation lever (not shown) or the like.

These fork (30), sleeve (28), etc. constitute a latch (25) on which it runs.

The forward speed change gear (27) is provided on the intermediate shaft (19) with a spline so as to be movable in the axial direction, and is connected to the reverse speed change sprocket.
(2B) is rotatably provided on the intermediate shaft (19). The forward speed change gear (27) is a large-diameter high-speed gear (27a)
and a small-diameter low-speed gear (27b) are integrally formed, and an engaging convex portion (27c) is formed on the end face of the reverse gear change block (28). As shown in detail in FIG. 7, this forward speed change gear (27) is a high speed gear (27a
) and the low speed gear (27b), a groove (27d) is formed, and a shift fork (32) fixed to the shift rod 2 (31) is fitted into this groove (27d). The shift rod (31) is attached to the transmission case (1
5) so as to be movable in the axial direction substantially parallel to the intermediate shaft (19), and 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. Note that (33) indicates a plurality of grooves (31a) formed on the left side of the shift rod (31) in the figure.
), which is biased by a spring (34) toward the gear position, and fits into the groove (31a) in response to a gear shift operation to generate a sense of moderation.

Reverse speed change sprocket) (2B) is forward speed change gear (2B)
7) side end face of the forward speed change gear (27).
7e) is formed with an engaging convex portion (28a) that can be engaged with. When the forward speed change gear (27) moves to the leftmost position, this reverse speed change sprocket (2B) engages the engagement convex portion (28a) of the forward speed change gear (27).
27c) and rotate together with the forward speed change gear (27).

Output I! 1lI (20) has a 0T low speed counter gear (0T) that meshes with the low speed gear (27b) of the forward speed change gear (27).
35), a high-speed counter gear (38) that can also mesh with the high-speed gear (27a), and a reverse speed change sprocket (28).
) with a chain (37) bridged between it, r
Audience 1 + Kazugara Ota. At the left end of the figure is the driving shaft (3
A worm (2Oa) is formed which is mated with the worm wheel (40) provided in the section 9). Low speed counter gear (35) is tIiii! When the speed change gear (27) moves from the illustrated position to the right in the figure, it meshes with the low speed gear (27b), and when the forward speed change gear (27) moves from the illustrated position to the left in the figure, the high speed counter gear (3B) meshes with the low speed gear (27b). Gear (27a)
mesh with. The transmission mechanism (14) mentioned above can have 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 (89). The illustrated position of the speed change gear (27) represents a neutral position.

As shown in Figure 2, the drive shaft (39) has crawler drive sprockets (7) (4
1) are provided, and on both sides of the frame (11), each of these driving sprockets (41) and driven sprockets (42) are provided.
) A crawler (43) serving as a traveling means is bridged in the front-rear direction. The driven sprocket (42) is the first
As shown in the figure, a long hole (44) extending in the rearward direction is formed in the bracket (44) suspended on the frame (11).
a) is attached to the axle (45) that passes through it. This axle (45) can change its position in the longitudinal direction by moving within the elongated hole (44a), and is fixed in the longitudinal direction by a pole (4B) that is screwed into the bracket (44).

Note that (47) is a lock nut screwed onto Pole (4B).

A recess (48) is formed on the outside of the front part of the transmission case (!5) and is recessed backward and opened at the front, and the front opening of these four parts (48) is closed by a cover (50) to form a friction multi-plate type. A storage space is defined in which a dry clutch (51) is stored. This cover (50) is fastened to the front end of the transmission case (15) with six wooden bolts (49) that penetrate at regular intervals in the direction of one rotation. These recesses (4) of the transmission case (15)
(b) The partition wall (48a) and the cover (50) constitute a clutch housing (52). Dry type cracker 2ch (51)
is the recess (48) of the transmission case (15)
An input shaft (18) passing through the partition wall (48a) and an output shaft (53) connected to an auger and a blower are connected so as to be connectable and disconnectable.

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. drive play h
(5B) is a plurality of driven plates (59) which are displaceable in the axial direction so as to rotate integrally with the clutch drum (58), and which are arranged alternately in the axial direction,
57) to make frictional contact. The clutch drum (58) is radially connected to the output shaft (53) via a rubber elastic body (60) with a rivet (61).

The piston (57) has a drive plate (5
B) and the suppressing part (59) that presses the driven plate (59).
57a), and a plurality of retaining pieces (5?b) are integrally formed at regular intervals in the direction of one rotation. These engagement pieces (57b) are connected to the disc portion (5) of the clutch hub (55).
5b) slidably in the axial direction to insert the engine (13).
An annular retainer (83) is protruded to the side and is fixed to the engine (13) side end by a bolt (82). Between the retainer (83) and the clutch hub (55), a plurality of return springs (64) are compressed and held by the engagement piece (57b), and the piston (57b)
is urged away from the drive plate (56) on the left side in the figure.

Further, an engagement piece (e3a) is formed on the retainer (63), and a shifter (B5) is arranged so as to be able to come into contact with this engagement piece (Ha). The shifter (85) includes a cylindrical portion (4) that integrally extends from the concave portion (48) and the partition wall (48a) of the transmission case (15) and into which the input shaft (18) is loosely inserted.
8b) is slidably inserted, and a fork (8B) is fitted into a groove (65a) formed on its outer periphery.

-y j -)y (R8)I+m 8111j n云JuA! The rotation shaft (87a) of the release lever/<- (87) supported by the transmission case (15)
) and responds to the release lever (67). The release lever (67) has a spring (B8) compressed between it and the transmission case (15) at one end, and a buffer spring (69) and a cable (70) at the other end.
) is connected to a clutch operating lever (72) provided on the handle (12). This release lever (
When the clutch operating lever (72) is operated, the clutch operating lever (72) rotates clockwise in FIG. In Fig. 5, it is moved to the right to separate it from the retaining piece (57b), but if the clutch or operating lever (72) is not operated, the spring (88) biases the chic (85) counterclockwise. The engagement piece (57b) is pressed.

In the dry clutch (51) shown in FIG. 5, the upper half represents the connected state and the lower half represents the disconnected state. That is, when the shifter (65) is separated from the engagement piece (57b), the return spring (64) forces the piston (57) to the right in the figure to press the drive plate (5B) and the driven plate (59) to connect the input shaft (18) and output shaft (53). However, Chic (65) is a retainer (
57b), the piston (57) moves to the left in the figure against the elastic force of the return spring (84), and the input shaft (
18) and the output shaft (58) are separated.

As shown in FIG. 1, the output shaft (53) of the dry clutch (51) has a drive shaft (73) for driving the auger and blower.
) are connected. The drive shaft (73) is the output shaft (53
) is connected to one end by a serration, and the force is <-(5
A first solid shaft (73a) that rotatably penetrates the auger bracket (74) and a worm (71a) are formed.
), and a hollow shaft (73c) that connects these first solid shaft (?3a) and second solid shaft (73b) by extrapolating them together. ). The hollow shaft (73C) has its first solid shaft (73a
) A blower (75) consisting of three wings (75a) that are divided in the rotational direction and protrude in the radial direction is fixed to the outer periphery of the end on the ) side, and the second solid shaft (73b) is fixed.

That worm (?1a) is Ogre Bracket) (74
) is engaged with a worm wheel (71b) fixedly attached to an auger drive shaft (7th) rotatably supported by a worm wheel (71b).

The blower (75), as also shown in detail in FIG.
) is stored within. Blower housing 7).

The upper part thereof is open, and a discharge duct (78) (
(see Figure 1) is rotatably provided. In addition, (
+00) is the inclination of the discharge duct (7 days) (snow throwing distance #)
This handle (+00) is supported by the frame (11), and its front end is connected to the discharge duct (78) via a worm gear mechanism.

As shown in detail in FIG. 4, the auger drive shaft (76) has an auger assembly (79) fixed to each side of the worm wheel (?Ib).

These auger assemblies (79) each include three blades (80) each helically attached to the auger drive shaft (76).
), the front end is open and the rear end is fixed to the blower housing (77) described above.
1) It is stored inside.

Next, the operation of this embodiment will be explained.

This snow blower runs by driving a crawler (43) with the power of the engine (13), 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) 8 and blower (75) are connected to the engine (13), and snow shoveling and snow removal are performed by these auger (79) and blower (75). It is done.

This snow blower uses a dry clutch (51) to control the engine (13), auger (79), and blower (75).
Because the belt tensioner is connected to the
Maintenance work can be simplified.

Also, during maintenance work, an auger cover (8
1) is attached to the blower housing (77), and since the blower housing (77) is integrated with the cover (50) of the clutch housing (52), when these auger cover (81) and blower housing (77) are removed in sequence, , the dry clutch (51) can be exposed;
Maintenance can be performed more easily.

Furthermore, in this snow blower, the cover (50) is disposed in the transmission case (15) in the axial direction of the drive shaft (73).
), the drive shaft (73) will be connected to the dry crank, chi (
The output shaft (53) of the output shaft (51) is fitted with the serrations. Then, attach the bolt (48) to the cover (50) and attach the drive shaft (73) to the cover (50).
The bolts (49) are inserted into holes formed at regular intervals in the rotation direction around the blade (75a) of the blower (75).
) with the tool inserted between the transmission case (
15), the cover (50) is fastened to the transmission case (15). Therefore, it is easy to assemble the cover (50), that is, assemble the auger (79) and the blower (75), and it is possible to improve the work efficiency.

(Effects of the Invention) As explained above, according to the snow blower according to the present invention, the auger and the blower are connected to the engine via the clutch, and the direction of assembly and the direction of fastening of the cover covering the auger and the blower are the same. As a result, maintenance can be simplified and the auger and blower can be easily assembled.

[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, and FIG. 8 is an enlarged sectional view of the dry clutch. FIG. 9 is an exploded view of the main parts of a conventional snow blower. 11...Frame 13...-Engine 13a・
...Crankcase 13b...Crankshaft 14...
・Transmission mechanism 15...Transmission case 18...Input shaft 20...Output shaft 25・
...Running latch 43...Crawler 48a...
・Paper wall 49... Porto 50... Cover 51... Dry clutch 52... Clutch housing 53... Output shaft 73... Drive shaft 75.
... Blower 75a ... Wing body 76 ... Auger drive shaft 77 ... Blower housing 79 ... Auger assembly (auger) 81 ... Auger cover

Claims (1)

[Scope of Claims] A snow blower that runs by driving a traveling means through a transmission mechanism with an engine, and also drives an auger and a blower with the engine to shovel and remove snow, wherein the auger and blower are powered. A cover that connects the drive shaft to be transmitted to the engine via a clutch, and that comprises a plurality of wings that are divided in the rotational direction and protrude in the radial direction, and that the drive shaft passes through and covers the auger and the blower. is fixed around the axis of the drive shaft by a bolt passing through the auger side in the axial direction of the drive shaft.