JP4589895B2 - snowblower - Google Patents

Description

  The present invention relates to a technology of a snowplow that is operated by an operator while walking, and more particularly to a structure of a lock mechanism applied to a travel clutch and a snowplow clutch of the snowplow.

Conventionally, in a small and medium-sized snowplow operated by an operator while walking, a traveling clutch lever for switching on and off of the traveling clutch is provided in the vicinity of one of the left and right (usually left) of the steering handle. 2. Description of the Related Art A snow removal machine having a configuration in which a snow removal clutch lever for switching on / off of a snow removal clutch is provided in the vicinity of a steering handle (usually right) is known. For example, the technique is disclosed in Patent Document 1. In this snowplow, the operator can hold the left steering handle with the left hand and simultaneously rotate the travel clutch lever, and simultaneously remove the snow while the operator holds the right steering handle with the right hand. Since the clutch lever can be rotated and gripped, it is possible to easily switch between running and snow removal by the operator, thereby realizing good maneuverability. Further, in this snow remover, considering that it is necessary to operate other levers and the like during traveling, when the traveling clutch lever and the snow removing clutch lever are simultaneously in the “on” state, the snow removing clutch is The lock mechanism is designed to be held, and after the lock mechanism is activated, it is possible to continue running while removing snow even if the hand (usually the right hand) is released from the snow removal clutch lever. The lever can be operated. Furthermore, when the other hand (usually the left hand) is released from the travel clutch lever, the lock mechanism is released to stop both travel and snow removal work, so that The structure is designed with consideration given to safety so as not to continue traveling and removing snow without permission.
JP 2000-144666 A

  However, although the snowplow shown in the publicly known technology as described above achieves excellent maneuverability and safety by the lock mechanism, the lock mechanism has a complicated configuration that requires a large number of link mechanisms and the like. Also, the number of parts is increasing. Therefore, the assembling work of the lock mechanism is a time-consuming and difficult work, which increases the cost. Therefore, in view of such a current situation, the present invention has an object to provide a technique that makes it possible to configure a clutch locking mechanism with a simple configuration while ensuring the conventional excellent functions.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

In claim 1, the snow traveling part (13), the snow removal part (11), the snow traveling part (13), the drive part (12) for driving the snow removal part (11), and the steering handle (32). ), A traveling clutch for switching on / off of the snow traveling unit (13), and a snow removal clutch for switching on / off of the snow removing means, and the traveling clutch lever (35) of the traveling clutch is in an “on” state. When the snow removal clutch lever (39) of the snow removal clutch is in the “on” state, the snow removal machine includes a lock mechanism (50) that holds the snow removal clutch in the “on” state. (50), the running clutch lever plate cam running clutch to rotate together with (35) and (53), and the snow clutch lever (39) snow clutch plate cam which rotates together with (54), the dividing Constituted by a spring member (55) for engaging the clutch plate cam (54), and said traveling clutch plate cam (53), and a plate cam for the snow clutch (54), in parallel on the same axis Arranged and configured to be independently rotatable, the travel clutch plate cam (53) constituting the lock mechanism (50) is configured with an exclusion surface (53c) as unlocking means, and The snow removal clutch plate cam (54) is configured with a latching portion (54c) which is a lock holding means, and the spring member (55) is engaged with the latching portion (54c) which is the lock holding means to “enter”. While the state is maintained and the exclusion surface (53c) as the unlocking means passes, the spring member (55) in a state where the spring member (55) is hooked on the hooking portion (54c) is pushed up. those releasably a holding state A.

According to a second aspect of the present invention, in the snowplow according to the first aspect, the spring member (55) that is latched to the latching portion (54c) that is a lock holding means of the snow removal clutch plate cam (54) is made of steel. It is formed by bending a wire rod into a substantially U shape .

  As effects of the present invention, the following effects can be obtained.

In claim 1, the snow traveling part (13), the snow removal part (11), the snow traveling part (13), the drive part (12) for driving the snow removal part (11), and the steering handle (32). ), A traveling clutch for switching on / off of the snow traveling unit (13), and a snow removal clutch for switching on / off of the snow removing means, and the traveling clutch lever (35) of the traveling clutch is in an “on” state. When the snow removal clutch lever (39) of the snow removal clutch is in the “on” state, the snow removal machine includes a lock mechanism (50) that holds the snow removal clutch in the “on” state. (50), the running clutch lever plate cam running clutch to rotate together with (35) and (53), and the snow clutch lever (39) snow clutch plate cam which rotates together with (54), the dividing Constituted by a spring member (55) for engaging the clutch plate cam (54), and said traveling clutch plate cam (53), and a plate cam for the snow clutch (54), in parallel on the same axis Arranged and configured to be independently rotatable, the travel clutch plate cam (53) constituting the lock mechanism (50) is configured with an exclusion surface (53c) as unlocking means, and The snow removal clutch plate cam (54) is configured with a latching portion (54c) which is a lock holding means, and the spring member (55) is engaged with the latching portion (54c) which is the lock holding means to “enter”. While the state is maintained and the exclusion surface (53c) as the unlocking means passes, the spring member (55) in a state where the spring member (55) is hooked on the hooking portion (54c) is pushed up. since the release configured to be able to hold state Can configure the locking mechanism with a simple mechanism, and the number of parts can be reduced, thereby the cost reduction.

  Further, the travel clutch plate cam and the snow removal clutch plate cam can be arranged as close as possible, and the lock mechanism can be configured with a simple and compact mechanism.

  Further, the lock holding means and the lock release means can be configured with a simple mechanism. Further, the locked and unlocked state can be easily recognized from the outside, and adjustment and maintenance can be easily performed.

According to a second aspect of the present invention, in the snowplow according to the first aspect, the spring member (55) that is latched to the latching portion (54c) that is a lock holding means of the snow removal clutch plate cam (54) is made of steel. Since the wire is bent into a substantially U-shape , the lock mechanism can be configured with a simple mechanism. Further, the spring member can be manufactured at a low cost.

  Next, embodiments of the invention will be described. FIG. 1 is a perspective view showing an overall configuration of a snowplow according to an embodiment of the present invention, FIG. 2 is a partial perspective view showing a snow remover of the snow remover, and FIG. 3 is a steering handle of the snow remover. It is the partial rear view which showed the part.

  4 is a partial rear view showing details of the lock mechanism, FIG. 5 is a partial left side view showing the steering handle portion of the snowplow, and FIG. 6 is a partial left side showing the operating state of the lock mechanism. Similarly, FIG. 7 is a partial right side view showing the operating state of the lock mechanism.

  FIG. 8 is a partial left side view showing the operating state of the locking mechanism part, FIG. 9 is a partial right side view showing the operating state of the locking mechanism part, and FIG. 10 is a part showing the operating state of the locking mechanism part. Similarly, FIG. 11 is a partial right side view showing the operating state of the lock mechanism.

  First, the whole structure of the snow removal machine 1 in one Example of this invention is demonstrated using FIG. 1 or FIG. In addition, the direction of arrow A shown in FIG. 1 shall show the advancing direction of the snow removal machine 1, and shall determine right and left toward this advancing direction. As shown in FIG. 1, the snow removal machine 1 is provided with a snow removal unit 11 disposed at the front of the machine body, a drive unit 12 disposed behind the snow removal unit 11, and a lower part of the drive unit 12. The crawler-type traveling unit 13 and the driving operation unit 14 disposed behind the driving unit 12 and at the rear of the machine body.

  As shown in FIG. 1 or FIG. 2, the snow removal portion 11 is attached to the rear portion of the body frame 15 via a connection bracket 46 provided at the rear of the blower housing 16. In addition, a blower housing 16 is connected to the front portion of the machine body frame 15 in the snow removal portion 11, and an auger housing 18 is connected to the front of the blower housing 16. A blower (not shown) is provided in the blower housing 16, and the blower is fixed to the front and rear halfway of the blower shaft 41. An auger housing 18 is provided in the auger housing 18, and an auger shaft 42, which is a rotation shaft of the auger auger 19, is pivotally supported in the left-right direction of the auger housing 18.

  On the upper surface of the blower housing 16, a pipe-like discharge port 16 a is formed so as to protrude from the left and right center and protrude upward, and the base of the snow throwing shooter 21 is horizontally disposed at the upper end of the discharge port 16 a via the swivel seat 20. It is fitted so that it can turn freely. The snow throwing shooter 21 engages a holding mechanism (not shown) with the swivel seat 20 so that the snow thrower 21 can be held at an arbitrary position. Then, the gear is rotated by the turning motor, and the snow throwing shooter 21 is turned together with the turning seat 20 to change the snow throwing direction. In the present embodiment, a turning motor is applied as the turning means of the snow throwing shooter 21, but the present invention is not limited to this. An extended shooter handle or the like may be provided so as to be performed manually.

  In the snow removal section 11 configured as described above, the snow that has been scraped by the scraping auger 19 in the substantially central direction of the left and right of the auger housing 18 is splashed upward by the blower, and the direction is guided by the snow throwing shooter 21. It can be discharged in any direction. At the upper end of the snow throwing shooter 21, a cap 17 that is pivotally supported is provided so that the snow throwing distance of the discharged snow can be adjusted. That is, a tension spring 34 is provided between the snow throwing shooter 21 and the cap 17 so as to rotate upward, and is provided in the driving operation unit 14 via the link plate 27 and the wire 30. The chute operating lever 36 is connected, and the chute operating lever 36 is rotated to rotate the cap 17 against the tension spring 34 to adjust the snow throwing distance. . The rotating means of the cap 17 is not limited to manual operation, and the chute operating lever 36 can be configured by a switch by rotating with a motor or the like.

  In the drive unit 12, a transmission is installed inside the body frame 15, and the engine 22 is mounted on the upper part of the body frame 15. The power of the engine 22 is output from an output shaft that protrudes forward from the front end, and is transmitted to the snow removal unit 11 and the traveling unit 13. A travel output pulley and a snow removal output pulley are fixed to the output shaft as output pulleys. A belt (not shown) is wound between the snow removal output pulley and a snow removal input pulley (not shown) fixed to the rear end side of the blower shaft 41 that is the input shaft of the snow removal unit 11, and the power of the engine 22 is supplied to the snow removal unit. 11 is transmitted. However, the power transmission means is not limited to pulleys and belts, and chains, gears, and the like can be used and are not limited. In this way, the power transmitted to the snow removal unit 11 is further transmitted to the auger shaft 42 via the gear box 2 provided on the front end side of the blower shaft 41, and the blower and the take-in auger 19 are rotationally driven. The

  Further, a belt is wound between the travel output pulley and a travel input pulley fixed to the input shaft of the transmission of the travel unit 13 so that the power of the engine 22 is transmitted to the travel unit 13. The power transmitted to the traveling unit 13 is shifted by the transmission and then transmitted to the drive shaft 23, and the drive sprockets 25 and 25 fitted to the drive shaft 23 are rotationally driven.

  A driving shaft 23 in which driving sprockets 25 and 25 are fitted to the lower part of the body frame 15 is rotatably supported on the traveling unit 13, and driven sprockets 26 and 26 are fitted on the rear part of the body frame 15. The rear axle 24 is horizontally supported so as to be rotatable. An endless crawler belt 31 is wound around the drive sprocket 25 and the driven sprocket 26 to form a crawler, and the drive sprocket 25 is driven to rotate by the pair of left and right crawlers.

  The driving operation unit 14 has steering handles 32 and 32 projecting obliquely rearward and upward from the rear portions on both sides of the body frame 15, and an operation box 33 is disposed between the steering handles 32 and 32 in plan view. . The operation box 33 includes a travel clutch lever 35 for performing power transmission / removal operation from the engine 22 to the travel unit 13 and a snow removal for performing power transmission / removal operation from the engine 22 to the snow removal unit 11. The clutch lever 39, the above-mentioned snow throwing shooter 21 is turned, the cap 17 is turned up and down, the chute operating lever 36, and the engine speed 22 is operated. In addition, a travel speed change lever 38 and the like for performing a speed change operation by the speed change device are disposed.

  The traveling clutch lever 35 is configured to be able to grasp the traveling clutch lever 35 while grasping the steering handle 32. The traveling clutch lever 35 operates when it is grasped together with the steering handle 32, and stops when released. Has been. The travel clutch lever 35 and the snow removal clutch lever 39 are both disposed in the vicinity of the steering handle 32, and both the travel clutch lever 35 and the snow removal clutch lever 39 are attached to the clutch “disengagement” operation position. It is energized. Further, when the snow removal clutch lever 39 is set to “ON” while the travel clutch lever 35 is set to “ON”, the snow removal clutch can be locked at the operation position of the “ON”. The above is description about the whole structure of the snow remover 1 in one Example of this invention.

  Next, the configuration of the lock mechanism, which is the main part of the present invention, will be described with reference to FIGS. As shown in FIG. 3 or FIG. 4, the lock mechanism 50 includes a first rotating shaft 51, a second rotating shaft 52, a joint shaft member 65, a travel clutch plate cam 53, a snow removal clutch plate cam 54, and a spring member. 55 and left and right support fittings 56a and 56b fixed to the steering handle 32. The first rotation shaft 51 is a steel shaft member, one end (left end) of which is pivotally supported by a support fitting 56a, and the other end (right end 51a) is connected to a joint shaft member 65. The formed hole 65a is rotatably fitted and is horizontally provided in the left-right direction. Further, the first rotating shaft 51 is fixed in a non-rotatable manner relative to the support plate portion 35a of the traveling clutch lever 35 in the vicinity of the shaft support portion by the support fitting 56a, and the rotation of the traveling clutch lever 35 ( In other words, the first rotation shaft 51 is configured to rotate as the operator grasps the travel clutch lever 35 or releases the hand).

  The second rotating shaft 52 is a steel shaft member, and one end (right end) is pivotally supported by the support metal fitting 56b, and the other end (left end portion 52a) is connected to the joint shaft member 65. It is fitted in the formed hole 65a and is laid horizontally in the left-right direction. A hole 52b is formed in the end 52a of the second rotation shaft 52 so as to be orthogonal to the axis of the second rotation shaft 52, and a fixing member 59 is inserted into the hole 52b. By fixing the member 59 with a nut, the joint shaft member 65 and the second rotating shaft 52 are fixed so as not to be relatively rotatable. With this configuration, the first rotation shaft 51 can rotate independently, and the second rotation shaft 52 can rotate integrally with the joint shaft member 65, and The moving shaft 51 and the second rotation shaft 52 are rotatable independently of each other while having substantially the same axis. Further, the second rotation shaft 52 is fixed so as not to rotate relative to the support plate portion 39a of the snow removal clutch lever 39 in the vicinity of the shaft support portion by the support metal fitting 56b, and with the rotation of the snow removal clutch lever 39 ( In other words, the second rotating shaft 52 is configured to be rotated as the operator grips or removes the snow removal clutch lever 39).

  As shown in FIG. 4 or FIG. 5, the travel clutch plate cam 53 is a plate-like member obtained by processing a steel plate into a substantially elliptical shape, and is first welded or the like so that the plate surface is orthogonal to the first rotation shaft 51. The rotating shaft 51 is fixed. Further, as shown in FIG. 6, the travel clutch plate cam 53 forms a smooth contact surface 53a that contacts the spring member 55 on the rear surface when the travel clutch lever 35 is released (travel clutch “disengaged”). The contact surface 53a is formed with a linear exclusion surface 53c having a radius that is substantially upward from the rear end, and a linear holding surface 53d that is parallel to the tangent from the upper end of the exclusion surface 53c to the front upper direction. ing. In this way, the contact surface 53a is provided with the exclusion surface 53c and the holding surface 53d, and the distance between the contact surface 53a (exclusion surface 53c and holding surface 53d) and the axis of the first rotation shaft 51 is the first rotation. The cam mechanism which changes with rotation of the axis | shaft 51 is comprised.

  Further, the travel clutch plate cam 53 has a latch portion 53 b for latching one end (wire end 57 a) of the travel clutch wire 57 and one end of the travel clutch spring 60. Projecting in a vertical direction. A hole is formed near the tip of the latching portion 53b, and the pin 62 is inserted into the hole so that the wire end 57a is not detached. As shown in FIG. 5, the other end of the travel clutch spring 60 is hooked to the front stay 64a in the extended state at the front lower side of the lock mechanism 50, and the travel clutch plate cam 53 is shown in FIG. It is set as the structure always urged | biased in the direction rotated counterclockwise. The other end of the travel clutch wire 57 is connected to a travel clutch (not shown), and the travel clutch plate cam 53 is urged by the travel clutch spring 60 and rotated counterclockwise in FIG. Is configured so that the traveling clutch is turned “ON” when the traveling clutch is turned “OFF” and the operator holds the traveling clutch lever 35 and is rotated more than a certain angle clockwise in FIG. Yes.

  As shown in FIG. 4 or FIG. 5, the snow removal clutch plate cam 54 is a plate-like member obtained by processing a steel plate into a substantially elliptical shape and partially forming a latching portion 54c, and the plate surface is a joint shaft. It is fixed to the joint shaft member 65 by welding or the like so as to be orthogonal to the member 65. The snow removal clutch plate cam 54 is formed with a hole 54e so as to communicate with the hole 65a of the joint shaft member 65, and the first rotation shaft 51 can be inserted into the hole 65a. ing.

  As shown in FIG. 7, the snow removal clutch plate cam 54 has a smooth arcuate contact surface 54a that contacts the spring member 55 on the rear surface when the snow removal clutch lever 39 is released (snow removal clutch “off”). A latching portion 54c is formed in the diagonally upper position of the contact surface 54a by providing a notch in the radial direction to reduce the radius. Thus, a cam mechanism is formed in which the distance between the contact surface 54 a and the axis of the second rotation shaft 52 changes as the second rotation shaft 52 rotates. Note that the latching portion 54c and the holding surface 53d are provided in a portion where an engaging portion 55b of a spring member 55 described later is located in a state where the travel clutch lever 35 and the snow removal clutch lever 39 are gripped to the maximum. That is, as shown in FIG. 6 or FIG. 7, the exclusion surface 53 c has a latching portion in a state where the snow removal clutch lever 39 is released from a position where it contacts the engaging portion 55 b of the spring member 55 in a state where the traveling clutch lever 35 is released. It is formed in a straight line up to the position immediately before reaching 54c.

  Further, the snow removal clutch plate cam 54 has a latching portion 54 b for latching one end of the snow removal clutch wire 58 (wire end 58 a) and one end of the snow removal clutch spring 61, and the surface of the snow removal clutch plate cam 54. Projecting in a vertical direction. A hole is formed near the tip of the latching portion 54b, and the pin 63 is inserted into the hole so that the wire end 58a is not detached. As shown in FIG. 5, the other end of the snow removal clutch spring 61 is hooked to the front stay 64a in the extended state at the front lower side of the lock mechanism 50, and the snow removal clutch plate cam 54 in FIG. It is set as the structure always urged | biased in the direction rotated counterclockwise. Further, the other end of the snow removal clutch wire 58 is connected to a snow removal clutch (not shown), and when the snow removal clutch plate cam 54 is biased by the snow removal clutch spring 61 and rotated counterclockwise in FIG. The snow removal clutch is set to “OFF”, and when the operator holds the snow removal clutch lever 39 and is rotated more than a certain angle clockwise in FIG. 5, the snow removal clutch is set to “ON”.

  As shown in FIG. 3, the spring member 55 is a member obtained by forming a steel wire into a substantially U shape, and fixing portions 55 a and 55 a for fixing bolts bent in a U shape are formed at both ends of the wire. The horizontal portion at the upper end portion at the center of the left and right is formed as an engaging portion 55b. As shown in FIG. 3, in the installed state, the fixed portion is attached to the reinforcing plate 66 fixed to the steering handle 32 at both sides below and parallel to the first rotating shaft 51 and the second rotating shaft 52. By fixing the bolts 55a and 55a with bolts, the rear view is substantially trapezoidal.

  Further, as shown in FIG. 5, the spring member 55 is configured to have a substantially square shape when viewed from the left side, and the upper end is the front (the axis of the first rotation shaft 51 and the second rotation shaft 52). It is energized to rotate in the direction). That is, as shown in FIG. 6, the spring member 55 is in the position A shown in FIG. 6 in the undeformed state at the time of assembly, and in the state assembled together with the plate cams 53 and 54, the clockwise direction in FIG. It is in a state of being inclined to. At this time, since the restoring force in the counterclockwise direction to return to the original A position is generated in the spring member 55, the spring member 55 always maintains the state in contact with the plate cams 53 and 54. ing. With this configuration, when a pressing force is applied to the engaging portion 55b (the trapezoidal upper bottom portion) of the spring member 55, the left and right side portions that form the substantially C shape of the spring member 55 are substantially even. In order to be elastically deformed, the spring member 55 is configured to function as a leaf spring against a pressing force from other than the left-right direction. That is, the leaf spring is configured with a simple configuration using a wire. The above is the description of the configuration of the lock mechanism.

  Next, the operation state of the lock mechanism will be described with reference to FIGS. As shown in FIG. 6 or FIG. 7, when both the travel clutch lever 35 and the snow removal clutch lever 39 are not gripped, the plate cams 53 and 54 are most inclined forward by the urging force of the springs 60 and 61. Since both the travel clutch and the snow removal clutch are in the “off” state, the snow removal machine 1 is in the travel stop state and the snow removal unit 11 is not in operation. At this time, the spring member 55 is in contact with the contact surfaces 53a and 54a of the plate cams 53 and 54, and does not limit the rotation of the plate cams 53 and 54. ing. The contact surfaces 53a and 54a are formed with the same radius.

  Next, as shown in FIG. 8 or FIG. 9, both clutches “ON” in which both the traveling clutch lever 35 and the snow removal clutch lever 39 are gripped from the above-mentioned both clutch “disengaged” state (the state shown in FIGS. 6 and 7). In this state, the first rotation shaft 51 and the second rotation shaft 52 rotate against the urging force of the springs 60 and 61, and the travel clutch plate cam 53 and the snow removal clutch rotate clockwise in FIG. The plate cam 54 is rotated. At this time, the spring member 55 is in contact with the plate cams 53 and 54 while changing the inclination in accordance with the distance between the contact surfaces 53a and 54a and the shaft centers of the shafts 51 and 52. Then, after passing the section of the contact surface 53a of the travel clutch plate cam 53 and entering the section of the exclusion surface 53c, the shaft center and the exclusion surface 53c are compared to the contact surface 54a of the snow removal clutch plate cam 54. Since the distance is configured to be small, the spring member 55 comes into contact only with the contact surface 54a of the snow removal clutch plate cam 54 from the middle of a series of rotation operations.

  Further, when the plate cams 53 and 54 are rotated and the contact portion with the spring member 55 gets over the end portion 54d of the contact surface 54a, the engagement portion 55b of the spring member 55 is fitted into the hook portion 54c. Thus, the snow removal clutch plate cam 54 is hooked by the spring member 55 and cannot rotate in the counterclockwise direction in FIG. At this time, when the operator releases his / her hand from the snow removal clutch lever 39, the urging force rotated counterclockwise by the snow removal clutch spring 61 acts on the snow removal clutch plate cam 54, but the spring member 55 is tangential. Since the contact portion of the notch of the latching portion 54c is provided in the radial direction, the snow removal clutch plate cam 54 is latched and cannot rotate, and the snow removal clutch It is configured to maintain the “ON” state. The engaging portion 55b of the spring member 55 may be provided with a rotating body such as a collar or a bearing in order to improve movement or prevent wear of the engaging portion 55b.

  That is, after both the levers 35 and 39 are simultaneously grasped and the snow removal machine 1 starts running and snow removing work, if the running clutch lever 35 is continuously grasped, the snow removing clutch can be operated even if the snow removing clutch lever 39 is released. Since the “on” state is maintained, it is configured such that another lever operation can be performed with a hand separated from the snow removal clutch while continuing the snow removal work.

  Next, as shown in FIG. 10 or FIG. 11, if the hand is also released from the traveling clutch lever 35 from the above-mentioned both clutch “on” state (the state of FIGS. 8 and 9), the urging force of the traveling clutch spring 60 causes the illustration. 10, only the travel clutch plate cam 53 is independently rotated counterclockwise. At this time, the engaging portion 55b of the spring member 55 comes into contact with the exclusion surface 53c from the holding surface 53d of the travel clutch plate cam 53, and the radius gradually increases on the exclusion surface 53c. Is pushed to the side, tilted clockwise in FIG. 10, and gradually pushed out from the latching portion 54c. When the spring member 55 is completely pushed out from the latching portion 54 c, the snow removal clutch plate cam 54 loses the latching force by the spring member 55, so that the counterclockwise rotation in FIG. 10 is caused by the biasing force of the snow removal clutch spring 61. Rotated in the direction. Therefore, when the travel clutch is “disengaged”, the snow removal clutch is also “disengaged” substantially simultaneously.

  That is, when the snow removing clutch is kept in the “on” state (ie, the snow removing operation is maintained) with the hand released from the snow removing clutch lever 39 by the lock mechanism 50, the hand is also moved from the traveling clutch lever 35. When the vehicle is released, the travel is stopped and the lock mechanism 50 is released, and the snow removal clutch is set to the “disengaged” state (that is, the snow removal operation is stopped) to function as a deadman switch. ing. Thereby, the lock mechanism 50 having a simple configuration can realize the function of the deadman switch and ensure safety while ensuring the workability when the snow remover 1 is traveling. The above is the description of the operating state of the lock mechanism.

  As shown in the above description, the traveling unit 13, the snow removal unit 11, the driving unit 12 that drives the traveling unit 13 and the snow removal unit 11, the steering handle 32, and the traveling clutch that switches on / off of the traveling unit 13, A snow removal clutch that switches on / off of the snow removal unit 11, and if the travel clutch lever 35 of the travel clutch is in the “on” state and the snow removal clutch lever 39 of the snow removal clutch is in the “on” state, the snow removal clutch The snow removal machine 1 includes a lock mechanism 50 that holds the snow clutch in a “ON” state, and the lock mechanism 50 hooks the travel clutch plate cam 53, the snow removal clutch plate cam 54, and the snow removal clutch plate cam 54. It is comprised by the spring member 55 which stops. As a result, the lock mechanism can be configured with a simple mechanism. In addition, the number of parts can be reduced and the cost can be reduced.

  Further, in the lock mechanism 50, the travel clutch plate cam 53 constitutes a lock release means (exclusion surface 53c), and the snow removal clutch plate cam 54 constitutes a lock holding means (hanging portion 54c). I have to. Thus, the lock holding means and the lock release means can be configured with a simple mechanism. Further, the locked and unlocked state can be easily recognized from the outside, and adjustment and maintenance can be easily performed.

  Further, the travel clutch plate cam 53 and the snow removal clutch plate cam 54 are arranged in parallel on the same axis formed by the first rotary shaft 51 and the second rotary shaft 52 and rotate independently of each other. It is configured to be movable. As a result, the travel clutch plate cam 53 and the snow removal clutch plate cam 54 can be arranged as close as possible, and the lock mechanism can be configured with a simple and compact mechanism.

  Further, the spring member 55 has a configuration in which a steel wire is bent into a leaf spring shape. As a result, the lock mechanism can be configured with a simple mechanism. In addition, the spring member can be manufactured at low cost.

The perspective view which showed the whole structure of the snow remover which concerns on one Example of this invention. The partial perspective view which similarly showed the snow removal part of the snow remover. The partial rear view which similarly showed the steering handle part of a snowblower. The partial rear view which showed the detail of the locking mechanism part similarly. The partial left view which similarly showed the steering handle part of a snowblower. The partial left view which similarly showed the operation condition of the lock mechanism part. The partial right view which similarly showed the operation condition of the lock mechanism part. The partial left view which similarly showed the operation condition of the lock mechanism part. The partial right view which similarly showed the operation condition of the lock mechanism part. The partial left view which similarly showed the operation condition of the lock mechanism part. The partial right view which similarly showed the operation condition of the lock mechanism part.

DESCRIPTION OF SYMBOLS 1 Snow remover 11 Snow removal part 12 Drive part 13 Traveling part 32 Steering handle 35 Traveling clutch lever 39 Snow removal clutch lever 50 Lock mechanism 53 Traveling clutch plate cam 54 Snow removal clutch plate cam 55 Spring member

Claims (2)

A snow travel unit (13), a snow removal unit (11), a drive unit (12) for driving the snow travel unit (13) and the snow removal unit (11), a steering handle (32), and the snow travel A travel clutch for switching on / off of the section (13) and a snow removal clutch for switching on / off of the snow removal means, the travel clutch lever (35) of the travel clutch being in the “on” state, and the snow removal clutch if snow clutch lever (39) is in "oN" state of a snowplow having a locking mechanism (50) for holding the snow clutch in "oN" state, the locking mechanism (50), the a running clutch lever (35) plate for running clutch rotates together with the cam (53), and the snow clutch lever (39) pivoted to snow clutch plate cam with (54), plate cam the snow clutch ( 4) constituted by a spring member (55) for engaging a said traveling clutch plate cam (53), and a plate cam for the snow clutch (54), arranged in parallel on the same axis, each independently The travel clutch plate cam (53) constituting the lock mechanism (50) is configured to have a removal surface (53c) as unlocking means, and the snow removal clutch plate cam. (54) constitutes a latching portion (54c) which is a lock holding means, and the spring member (55) is engaged with the latching portion (54c) which is the lock holding means to hold the "ON" state. When the exclusion surface (53c), which is the unlocking means, passes, the holding state can be released by pushing up the spring member (55) in which the spring member (55) is hooked on the hook portion (54c). A snowblower characterized by being configured as described above . 2. The snow remover according to claim 1, wherein the spring member (55) which is hooked to the hook portion (54c) which is a lock holding means of the snow removing clutch plate cam (54) is made of a steel wire. A snowblower characterized by being formed by bending into a mold .

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