JP4315390B2 - Winding prevention member and tilling claw shaft assembly - Google Patents

Description

  The present invention relates to a tilling claw shaft assembly in a rotary tiller and a wrapping preventing member applied to the tilling claw shaft assembly.

  It is conventionally known to prevent tangling of unnecessary objects such as grass on the outer peripheral surface of the tilling claw shaft by attaching a winding prevention member to the tilling claw shaft in the rotary tilling device (for example, See Patent Document 1 below).

  By providing such an anti-winding member, unnecessary objects such as grass are wound so as to straddle the anti-winding member and the tilling claw shaft. As compared with the case of winding in a close contact state, there is an effect that it becomes easier to cut and remove unnecessary materials after winding.

However, the conventional winding preventing member is linear over substantially the entire area in the axial direction of the tilling claw shaft.
Therefore, even if the removal work of cutting the unnecessary object after being wound with a sickle or the like can be facilitated, the amount of winding of the unnecessary object cannot be reduced.

Furthermore, in the conventional linear winding preventing member, the unnecessary matter is wound substantially uniformly over substantially the entire area in the axial direction of the tilling claw shaft.
Therefore, since it is difficult to insert a cutting member such as a sickle between the wrapping preventing member and the tilling claw shaft, there is a problem in that it takes time and effort to cut and remove the unnecessary material and the efficiency is low.
Moreover, the removal operation | work of the said unnecessary thing wounded had to be performed over the whole axial direction direction of the said tilling nail | claw axis | shaft, and there also existed a problem also in the point of the efficiency of this removal operation | work.
Japanese Utility Model Publication No. 4-110402

The present invention has been made in view of the above prior art, and an object of the present invention is to provide a wrapping prevention member and a tilling claw shaft assembly having a simple structure that can reduce the amount of wrapping of unnecessary objects such as grass.
Another object of the present invention is to provide a simple anti-winding member and a tilling claw shaft assembly that can improve the efficiency of removing unnecessary objects such as wrapped grass.

In order to achieve the above object, the present invention is provided with a tilling claw shaft that is driven to rotate about an axis along the vehicle width direction and a radially outward projection on the outer peripheral surface of the tilling claw shaft. A wrapping preventing member mounted on a tilling claw shaft assembly having a tilling claw so as to cover substantially the entire axial direction of the tilling claw shaft, and is located in a first region in the axial direction of the tilling claw shaft. A first portion, a second portion located in a second region different from the first region with respect to the axial direction, and a transition portion extending between the first and second portions. Provides a wrapping preventing member configured to be substantially along the axis at different positions in the circumferential direction with respect to the axis of the tilling claw shaft.
Preferably, the transition portion is inclined so as to be displaced in the circumferential direction of the tilling claw shaft as it goes from one of the first or second portions to the other.

In order to achieve the above object, the present invention is provided with a tilling claw shaft that is driven to rotate about an axis along the vehicle width direction, and an outer peripheral surface of the tilling claw shaft that protrudes radially outward. An anti-winding member that is mounted on a tilling claw shaft assembly having a tilled claw shaft so as to cover substantially the entire axial direction of the tilling claw shaft, and is located in a first region in the axial direction of the tilling claw shaft. A first portion; a second portion located in a second region different from the first region with respect to the axial direction; and a transition portion extending between the first and second portions, wherein the first and first The two portions provide an anti-winding member configured such that the distances from the outer peripheral surface of the tilling claw shaft are different from each other.
Preferably, the transition portion is inclined so as to approach the outer peripheral surface of the tilling claw shaft as it goes from one of the first or second portions to the other.
For example, of the first or second portion, a high-order portion having a large separation distance from the outer peripheral surface of the tilling claw shaft is positioned on the front side in the rotation direction of the tilling claw shaft than the other low-order portion.

  In the various aspects, preferably, the transition portion is configured to be positioned at a central portion in the axial direction of the tilling claw shaft.

In order to achieve the above object, the present invention is provided with a tilling claw shaft that is driven to rotate about an axis along the vehicle width direction, and an outer peripheral surface of the tilling claw shaft that protrudes radially outward. There is provided a tillage claw shaft assembly provided with a tilled claw, a winding preventing member of any one of the various aspects, and another winding preventing member different from the one winding preventing member To do.
Preferably, the other anti-winding member may have the same configuration as the one anti-winding member.

According to the winding preventing member according to one aspect of the present invention, the first portion located in the first axial direction region of the tilling claw shaft and the second portion located in the second region different from the first region in the axial direction. Since the two portions are configured so as to be substantially along the axis at positions different from each other in the circumferential direction with respect to the axis of the tilling nail shaft, unnecessary parts such as grass to the winding prevention member and the tilling nail shaft Can be effectively reduced.
Further, according to such a configuration, the winding amount of the unnecessary matter wound so as to straddle the winding preventing member and the tilling claw shaft may be made non-uniform along the axial direction of the tilling claw shaft. it can. Therefore, a cutting member such as a sickle can be easily inserted between the anti-winding member and the tilling claw shaft, thereby improving the efficiency of cutting and removing unnecessary items.

If the transition part located between the first part and the second part is inclined so as to be displaced in the circumferential direction of the tilling claw shaft as it goes from one of the first or second parts to the other, By the moment of inertia accompanying rotation of the tillage claw shaft, it is possible to prevent or reduce the wrapping of unnecessary objects such as grass around the transition portion. Accordingly, a cutting member such as a sickle can be easily positioned between the winding preventing member and the tilling claw shaft via the transition portion, and the efficiency of the unnecessary material cutting and removing operation can be improved. Can do.
Further, according to such a configuration, it is possible to eliminate or reduce unnecessary material cutting / removing work for the transition portion, and also to increase the efficiency of the unnecessary material cutting / removing work. Can do.

Furthermore, according to the winding preventing member according to another aspect of the present invention, the distance between the first portion located in the first axial direction region of the tilling claw shaft from the outer surface of the tilling claw shaft and the axial direction is Since the second portion located in the second region different from the first region is configured so that the distance from the outer surface of the tilling claw shaft is different from each other, the winding preventing member and the grass on the tilling claw shaft, etc. It is possible to effectively reduce the amount of unneeded material wound.
Further, according to such a configuration, the winding amount of the unnecessary matter wound so as to straddle the winding preventing member and the tilling claw shaft may be made non-uniform along the axial direction of the tilling claw shaft. it can. Therefore, a cutting member such as a sickle can be easily inserted between the anti-winding member and the tilling claw shaft, thereby improving the efficiency of cutting and removing unnecessary items.

In addition, the transition portion located between the first portion and the second portion is inclined so as to approach the outer peripheral surface of the tilling nail shaft as it goes from one of the first or second portions to the other. By doing so, it is possible to prevent or reduce wrapping of unnecessary objects such as grass around the transition portion by the cam action of the transition portion. Accordingly, a cutting member such as a sickle can be easily positioned between the winding preventing member and the tilling claw shaft via the transition portion, and the efficiency of the unnecessary material cutting and removing operation can be improved. Can do.
Further, according to such a configuration, it is possible to eliminate or reduce unnecessary material cutting / removing work for the transition portion, and also to increase the efficiency of the unnecessary material cutting / removing work. Can do.

Hereinafter, preferred embodiments of a wrapping preventing member according to the present invention will be described with reference to the accompanying drawings.
1 to 3 show a side view, a plan view, and a rear view of a rotary tiller 100 to which the winding preventing members 300a and 300b according to the present embodiment are applied, respectively.

As shown in FIGS. 1 and 2, the rotary tiller 100 is connected to a rear portion of a working vehicle 1 such as a tractor via an elevating link mechanism 60 so as to be elevable.
The elevating link mechanism 60 includes a top link 61 and a pair of lower links 62 that are coupled to the work vehicle so that a front end portion thereof is swingable about a rotation axis along a vehicle width direction, and a transmission case 50 of the work vehicle 1. A hydraulic cylinder (not shown) disposed in the upper part, a pair of lift arms 70 swung around a rotation axis along the vehicle width direction by the hydraulic cylinder, the pair of lift arms 70 and the pair And a pair of lift rods 71 respectively connecting the lower links 62.

The rotary tiller 100 is connected to the rear ends of the top link 61 and the pair of lower links 62.
In the illustrated embodiment, a one-touch type attachment mechanism 65 (a so-called quick hitch mechanism) is attached to the rear ends of the top link 61 and the pair of lower links 62, and the rotary tiller 100 is The top link 61 and the pair of lower links 62 are connected via the one-touch type mounting mechanism 65.

  As shown in FIGS. 1 to 3, the rotary tiller 100 includes a gear case 110 disposed substantially at the center in the vehicle width direction, and a main beam 120 disposed on both sides of the gear case 110 along the vehicle width direction. A chain case 130 and a bearing plate 135 whose upper ends are respectively connected to left and right end portions of the main beam 120, and are supported on the lower ends of the chain case 130 and the bearing plate 135 in a state along the vehicle width direction. The tillage claw shaft assembly 200 is provided.

  The tilling claw shaft assembly 200 has a tilling claw shaft 210 whose left and right ends are rotatably supported on the lower ends of the chain case 130 and the bearing plate 135, and a diameter based on the axis of the tilling claw shaft 210. It has a plurality of tilling claws 220 provided on the outer peripheral surface of the tilling claw shaft 210 so as to extend outward in the direction.

  Further, the rotary tiller 100 includes a tilling upper surface cover 150 disposed so as to cover the top of the rotation trajectory of the tilling claw 220 and left and right sides disposed so as to cover the left and right sides of the rotation trajectory of the tilling claw 220. A tilling side cover 160 and a tilling rear cover 170 arranged to cover the rear of the rotation trajectory of the tilling claw 220 are provided.

  In such a rotary tiller 100, power is transmitted from the PTO shaft 51 projecting rearward from the transmission case 50 to the input shaft of the gear case 110 via a connecting shaft 55 provided with universal joints at both ends. It is to be transmitted. The power is transmitted to the tilling claw shaft 210 via a transmission shaft inserted into one of the main beams 120 and a transmission mechanism in the chain case 130.

4 and 5 are a schematic perspective view and a partially longitudinal rear view of the tillage claw shaft assembly 200, respectively. In FIG. 4, the tilling claw 220 is omitted.
6 (a) and 6 (b) show a schematic side view and a schematic development view of the tilling claw shaft assembly 200, respectively.

As shown in FIGS. 4 to 6, the tilling claw shaft assembly 200 is spaced radially outward from the outer peripheral surface of the tilling claw shaft 210 in addition to the tilling claw shaft 210 and the tilling claw 220. The wrapping preventing member 300 extends over substantially the entire axial direction of the tilling claw shaft 210.
As shown in FIGS. 4 and 6, in the present embodiment, the wrapping preventing member 300 is a first wrapping preventing member 300 a that is spaced apart in the circumferential direction with reference to the axis of the tilling claw shaft 210. And the 2nd winding prevention member 300b is included.

  As shown in FIGS. 4 and 6, the first winding preventing member 300 a includes a first portion 301 a located in the first axial direction region of the tilling claw shaft 210 and the first region with respect to the axial direction. It has the 2nd part 302a located in a different 2nd area | region, and the transition part 303a extended between the said 1st and 2nd parts 301a and 302a.

The first and second portions 301 a and 302 a are displaced in the circumferential direction with respect to the axis X of the tilling claw shaft 210.
In other words, in the present embodiment, the transition portion 303a causes the first and second portions 301a and 302a to substantially follow the axis X at positions different in the circumferential direction with respect to the axis X of the tilling claw shaft 210. It has become like this.

By providing such a first winding preventing member 300a, the posture of the unnecessary material when the unnecessary material such as grass is wound around the first winding preventing member 300a and the tilling claw shaft 210 is set to the first portion. 301a and the second portion 301b can be different.
Therefore, compared with the conventional winding prevention member made into the simple linear form, the winding amount itself of the said unnecessary thing can be reduced.
Further, according to the first winding preventing member 300 a, the amount of unneeded material wound around the first winding preventing member 300 a and the tilling claw shaft 210 is not increased in the axial direction of the tilling claw shaft 210. Accordingly, a cutting member such as a sickle can be easily inserted between the first winding preventing member 300a and the tilling claw shaft 210.

Preferably, as shown in FIGS. 4 and 6, the transition portion 303a is inclined so as to be displaced in the circumferential direction of the tilling claw shaft 210 from one of the first or second portions 301a and 302a toward the other. Can be used.
In this way, by tilting the transition portion 303a in the circumferential direction, it is possible to prevent or reduce wrapping of unnecessary objects such as grass around the transition portion 303a due to the moment of inertia accompanying the rotation of the tilling claw shaft 210.
Therefore, when the unnecessary material wound around the first winding prevention member 300a and the tilling claw shaft 210 is cut and removed by a cutting member such as a sickle, the cutting member can be easily removed via the transition portion 303a. It can be located between the first winding preventing member 300a and the tilling claw shaft 210, thereby making it possible to improve the efficiency of cutting and removing the unnecessary material.

Further, by preventing or reducing the wrapping of unnecessary materials such as grass around the transition portion 303a, it is possible to eliminate or simplify the operation of cutting and removing the unnecessary materials at the transition portion 303a.
That is, only the first and second portions 301a and 302a other than the transition portion 303a are removed when the unnecessary matter wound so as to straddle the first winding preventing member 300a and the tilling claw shaft 210 is cut and removed. Therefore, it is possible to improve the efficiency of cutting and removing the unnecessary material.

Preferably, as shown in FIG. 6, the transition portion 303 a can be disposed at a substantially central portion in the axial direction of the tilling claw shaft 210.
By providing such a configuration, the left and right balance of the entire tilling claw shaft assembly 200 can be favorably maintained while the first and second portions 301a and 302a are displaced in the circumferential direction.
In the present embodiment, the transition portion 303a is disposed at a position that intersects with the central bisector CL (a bisector extending in a direction perpendicular to the axis X) of the tilling claw shaft 210. (See FIG. 6).

In the present embodiment, as shown in FIG. 5, the first winding preventing member 300 a uses a claw holder 225 for attaching the cultivation claw 220 to the cultivation claw shaft 210, and uses the cultivation claw shaft. 210 is detachably mounted.
Specifically, as shown in FIG. 5, the tilling claw shaft 210 is provided with the claw holder 225 having a mounting hole that opens radially outward.
The tilling claw 220 is detachably fixed by a fastening member 226 such as a bolt in a state where the base end portion is inserted into the mounting hole of the corresponding claw holder 225.

In such a configuration, the first winding preventing member 300a is detachably attached to the tilling claw shaft 210 via a mounting bracket 310 attached to the claw holder 225.
Specifically, the mounting bracket 310 includes a main bracket 320 attached to an outermost nail holder 225E located at both axial ends of the tillage nail shaft 210 of the nail holder 225, and the outermost nail holder 225E. And an auxiliary metal fitting 330 attached to a claw holder 225M positioned inward of the tilling claw shaft 210 in the axial direction.

The main metal fitting 320 includes a plate portion 321 that is fixed to the inner surface of the outermost nail holder 225E, and a support portion 322 that extends inward in the axial direction of the tilling claw shaft 210 from the plate portion 321. Yes.
The plate portion 321 is detachably fixed to the inner surface of the outermost claw holder 225E via a fastening member such as a bolt.
In the present embodiment, as shown in FIG. 5, the plate portion 321 is fastened together with the tilling claws 220 by the tilling claws fastening members 226.
The support portion 322 is a mounting hole that opens inward in the axial direction of the tilling claw shaft 220 and has a support hole into which an end portion of the first winding preventing member 300a is fitted.

The auxiliary metal fitting 330 has a plate portion 331 that is detachably fixed to a corresponding inner surface of the claw shaft holder 225M by a fastening member such as a bolt.
The plate portion 331 is provided with a bearing hole through which the first winding preventing member 300a is inserted.
In the present embodiment, the auxiliary metal fitting 330 is also fastened together with the tilling claw shaft 220 by the fastening claws 226 for the tilling claws.

By attaching the first winding preventing member 300a to the tilling claw shaft 210 via the main metal fitting 320 and the auxiliary metal fitting 330 having such a configuration, the first winding attachment can be performed without removing the tilling claw 220. The prevention member 300a can be detached.
Accordingly, it is possible to facilitate maintenance work such as replacement of the first winding preventing member 300a.

As shown in FIG. 6, in the present embodiment, the second winding preventing member 300b also has the first winding preventing member 300a along the axial direction of the tilling claw shaft 210 in the same manner as the first winding preventing member 300a. It has a part 301b, a transition part 303b and a second part 302b.
The transition portion 303b is inclined such that the first portion 301b and the second portion 302b are displaced in the circumferential direction with reference to the axis of the tilling claw shaft 210.
As described above, the second winding preventing member 300b has substantially the same configuration as that of the first winding preventing member 300a, so that it is possible to further increase the efficiency of the unnecessary material cutting and removing operation.

Preferably, the transition portion 303b of the second anti-winding member 300b can be provided at substantially the same position in the axial direction of the transition portion 303a of the first anti-winding member 300a and the tilling claw shaft 210.
By providing such a configuration, it is possible to effectively reduce the amount of winding of the unnecessary object while maintaining the left / right balance of the tilling claw shaft assembly 200.

In the present embodiment, as shown in FIG. 6, in the first winding preventing member 300a, the first portion 301a is positioned on the front side in the rotation direction of the tilling claw shaft 210 with respect to the second portion 302a. In the second anti-winding member 300b, the first portion 301b is positioned behind the second portion 302b in the rotation direction of the tilling claw shaft 210.
Thus, the circumferential interval between the first portions 301a and 301b and the circumferential interval between the second portions 302a and 302b in the first winding preventing member 300a and the second winding preventing member 300b are made different. As a result, the amount of unnecessary matter wound around the transition portions 303a and 303b can be further reduced.

In the present embodiment, as described above, the second winding preventing member 300b is configured to have the transition portion 303b similarly to the first winding preventing member 300a. A substantially linear anti-winding member can also be used as the anti-winding member 300b (see FIG. 7).
Further, depending on the specifications, the second winding preventing member 300b can be deleted.

Further, in the present embodiment, as described above, the first winding prevention is performed so that the first portion 301a and the second portion 302a are displaced in the circumferential direction with respect to the axis of the tilling claw shaft 210. Although the member 300a (and the second anti-winding member 300b) is configured, the first portion 301a and the second portion 302a are configured to be displaced in the radial direction with respect to the axis of the tilling claw shaft 210. It is also possible.
That is, the first winding preventing member 300a (and / or the second winding preventing member 300b) is separated from the outer peripheral surface of the tilling claw shaft 210 of the first and second portions 301a and 302a. It is also possible to configure differently, and by this, the same effect as in the present embodiment can be obtained.

  In this manner, in the aspect in which the first and second portions 301a and 302a are configured to have different separation distances from the outer peripheral surface of the tilling claw shaft 210, preferably, the transition portion 303a is the first or second portion 301a. It can be inclined so that it may approach the outer peripheral surface of the said tilling nail | claw axis | shaft 210 as it goes to the other from one side of 2nd part 301a, 302a.

Further, as a matter of course, in the configuration in which the first and second portions 301a and 302a are displaced in the circumferential direction with reference to the axis X of the tilling claw shaft 210 as in the present embodiment, the first and second portions It is also possible to displace the two portions 301a and 302a in the radial direction with reference to the axis X of the tilling claw shaft 210.
In such a configuration, for example, a higher portion of the first or second portion 301a, 302a having a larger separation distance from the outer peripheral surface of the tilling claw shaft 210 is replaced with a lower portion of the tilling claw shaft 210 than the other lower portion. It can be located on the front side in the rotational direction.

FIG. 1 is a side view of a rotary cultivator to which a wrapping preventing member according to an embodiment of the present invention is applied. FIG. 2 is a plan view of the rotary cultivator shown in FIG. 1. FIG. 3 is a rear view of the rotary cultivator shown in FIGS. 1 and 2. FIG. 4 is a perspective view of a tilling claw shaft assembly provided with a winding preventing member according to an embodiment of the present invention. FIG. 5 is a partial longitudinal rear view of the tillage claw shaft assembly shown in FIG. 4. 6 (a) and 6 (b) are a schematic side view and a schematic development view of the tilling claw shaft assembly shown in FIGS. 4 and 5, respectively. FIGS. 7A and 7B are a schematic side view and a schematic development view, respectively, of a modified example of the tilling claw shaft assembly.

Explanation of symbols

200 Cultivation Claw Shaft Assembly 210 Cultivation Claw Shaft 220 Cultivation Claw 300a, 300b First Winding Prevention Member, Second Winding Prevention Member 301a, 301b First Part 302a, 302b Second Part 303a, 303b Transition Part

Claims (8)

A tilling claw shaft assembly having a tilling claw shaft that is driven to rotate about an axis along the vehicle width direction, and a tilling claw that is provided on an outer peripheral surface of the tilling claw shaft so as to protrude radially outward. A wrapping prevention member that is mounted so as to cover substantially the entire axial direction of the tilling claw shaft,
Between the first portion located in the first region in the axial direction of the tilling nail shaft, the second portion located in the second region different from the first region in the axial direction, and the first and second portions A transition portion extending,
The winding preventing member, wherein the first and second portions are configured to substantially follow the axis at positions different from each other in the circumferential direction with respect to the axis of the tilling claw shaft.   The winding according to claim 1, wherein the transition portion is inclined so as to be displaced in a circumferential direction of the tilling claw shaft as it goes from one of the first or second portions to the other. Prevention member. A tilling claw shaft assembly having a tilling claw shaft that is driven to rotate about an axis along the vehicle width direction, and a tilling claw that is provided on an outer peripheral surface of the tilling claw shaft so as to protrude radially outward. A wrapping prevention member that is mounted so as to cover substantially the entire axial direction of the tilling claw shaft,
Between the first portion located in the first region in the axial direction of the tilling nail shaft, the second portion located in the second region different from the first region in the axial direction, and the first and second portions A transition portion extending,
The winding preventing member, wherein the first and second portions are configured such that the distances from the outer peripheral surface of the tilling claw shaft are different from each other.   4. The winding according to claim 3, wherein the transition portion is inclined so as to approach the outer peripheral surface of the tilling claw shaft as it goes from one of the first or second portions to the other. Prevention member.   Of the first or second portion, the high-order portion having a large separation distance from the outer peripheral surface of the tilling claw shaft is configured to be positioned on the front side in the rotation direction of the tilling claw shaft than the other low-order portion. The winding prevention member according to claim 3 or 4 characterized by things.   The winding preventing member according to any one of claims 1 to 5, wherein the transition portion is configured to be positioned at a central portion in an axial direction of the tilling claw shaft. A tillage claw shaft that is driven to rotate about an axis along the vehicle width direction;
A tilling claw provided on the outer peripheral surface of the tilling claw shaft so as to protrude radially outward;
One winding prevention member according to any one of claims 1 to 4,
A tilling claw shaft assembly comprising: another winding preventing member different from the one winding preventing member. The tilling claw shaft assembly according to claim 7, wherein the other winding preventing member has the same configuration as the one winding preventing member.

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