JP4490699B2 - Roller wheel of crawler type traveling device - Google Patents

Description

  The present invention relates to a technology of a rolling wheel of a crawler type traveling device for supporting a crawler belt provided in a crawler type traveling device or the like.

  Conventionally, in a crawler type traveling device, a rolling wheel is provided at a position opposite to a driving sprocket for transmitting an output transmitted from a driving source such as an engine to a crawler belt, and the driving sprocket. It is rotatably provided between an idler (driven sprocket). Accordingly, the rolling wheel is provided for the purpose of supporting the crawler belt wound around the drive sprocket and the driven sprocket, assisting the slack of the crawler belt, and smoothing the transfer of the crawler belt. . In addition, by configuring an equalizer that rotatably supports a pair of front and rear rolling wheels on a track frame, it also has a function of suppressing large shaking of the airframe when overcoming a convex portion or the like on a farm field. As an example of the crawler type traveling device having such a structure, there is one as shown in Patent Document 1 below.

JP 2002-316661 A

  Specifically, the rolling wheels in the crawler type traveling device are rotatably provided on a support member fixed to a frame or the like of the crawler type traveling device. In this case, for example, when vibration occurs due to the unevenness of the traveling surface (farm scene) or the crawler belt lug during traveling, the vibration is transmitted from the rolling wheels to the body frame via the track frame. As a result, not only does the aircraft be adversely affected, but the entire crawler traveling device vibrates due to the vibration. Therefore, a driver who controls a crawler tractor or the like that employs the crawler type traveling device as described above may be difficult to control due to the vibration or may cause fatigue. In addition, since such vibration increases as the speed of the crawler type traveling device is increased, it is difficult to increase the speed above a certain level. Accordingly, the present invention has been made in view of the above circumstances, and an object of the present invention is to control vibration transmitted from a rolling wheel to a crawler type traveling device and to control a crawler tractor including the crawler type traveling device. It is to provide a rolling wheel of a crawler type traveling device that reduces a burden on a person and can be comfortably operated.

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

Between the drive sprocket (11) and the idler (12) constituting the crawler type traveling device (1), an equalizer (90) that swings in the front-rear direction about the swing shaft (21) is provided, and the equalizer Between the two left and right equalizer plates (20a, 20b) constituting (90), there is provided a shaft (51) for rotatably supporting two rolling wheels (13) by bearings (42), Engaging members (52a, 52b) are spline-fitted to both ends of the shaft (51), and engaging shafts (53, 54) corresponding to the engaging members (52a, 52b) are provided. Between the portions where the engageable shafts (53, 54) pass through the equalizer plates (20a, 20b) and the engaging members (52a, 52b) engage with the engageable shafts (53, 54). And the same axis on both sides of the elastic member (60a, 60b) The engaging members (52a and 52b) are connected on the core, and the engaging members (52a and 52b) have three protrusions (70a). The elastic members (60a and 60b) include three engaging members (52a and 52b). A notch (61a) for fitting the projection (70a) is formed, and the engaging shaft (53, 54 ) is fitted with the engagement member (52a, 52b) having the three projections on the engageable shaft (53, 54). An engaging portion (53b), which is a cut-out portion for fitting the members (60a, 60b), constitutes an engaging member (52a, 52b) that is spline-fitted to the shaft (51). The shafts (53, 54) are engaged with each other via the elastic members (60a, 60b).

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

Between the drive sprocket (11) and the idler (12) constituting the crawler type traveling device (1), an equalizer (90) that swings in the front-rear direction about the swing shaft (21) is provided, and the equalizer Between the two left and right equalizer plates (20a, 20b) constituting (90), there is provided a shaft (51) for rotatably supporting two rolling wheels (13) by bearings (42), Engaging members (52a, 52b) are spline-fitted to both ends of the shaft (51), and engaging shafts (53, 54) corresponding to the engaging members (52a, 52b) are provided. Between the portions where the engageable shafts (53, 54) pass through the equalizer plates (20a, 20b) and the engaging members (52a, 52b) engage with the engageable shafts (53, 54). And the same axis on both sides of the elastic member (60a, 60b) The engaging members (52a and 52b) are connected on the core, and the engaging members (52a and 52b) have three protrusions (70a). The elastic members (60a and 60b) include three engaging members (52a and 52b). A notch (61a) for fitting the projection (70a) is formed, and the engaging shaft (53, 54 ) is fitted with the engagement member (52a, 52b) having the three projections on the engageable shaft (53, 54). An engaging portion (53b), which is a cut-out portion for fitting the members (60a, 60b), constitutes an engaging member (52a, 52b) that is spline-fitted to the shaft (51). Since the shafts (53 and 54) are engaged with each other via the elastic members (60a and 60b), the impact and vibration received by the rolling wheels are absorbed by the elastic members and are affected by the impact and vibration. Is transmitted to the crawler type traveling device Whilst it is possible to suppress the vibration of the airframe comprising the crawler type traveling device.

  Further, since the shafts are formed in a shape that can be easily engaged with each other, the shafts can be easily engaged with each other.

Since the shafts are still engaged by engaging each other, the shafts can be automatically aligned by the rotation and vibration of the rolling wheels.
Moreover, since it engages only by meshing | engaging without using a volt | bolt and a nut, it becomes possible to aim at cost reduction since the number of parts is suppressed, and the work process in a manufacture process can also be simplified.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the accompanying drawings for understanding of the present invention.

  The following best mode for carrying out the present invention is an example embodying the present invention, and is not intended to limit the technical scope of the present invention.

  FIG. 1 is an external view showing a schematic configuration of a crawler tractor including a crawler type traveling device 1 in which a rolling wheel of the present invention is used, FIG. 2 is a side view of the crawler tractor shown in FIG. 1, and FIG. 3 is a reference example. FIG. 4 is a sectional view showing an embodiment of the rolling wheel according to the present invention, and FIG. 5 is an engagement detail view of the shaft of the rolling wheel in FIG.

  First, a schematic configuration of a crawler tractor including a crawler type traveling device 1 in which a rolling wheel of the present invention is used will be described with reference to FIGS. 1 and 2. An engine 3, which is an example of a drive source of the crawler type traveling device 1, is covered with a bonnet 4, and the engine 3 is fixed between main frames 6 and 6 on the lower left and right sides. A steering column 2 is provided at the rear of the bonnet 4, a round steering handle 7 for performing a steering operation is disposed on the steering column 2, and a seat 8 is disposed behind the steering handle 7. A step 18 is arranged below the steering column 2 and the seat 8 to constitute a driving part (cabin). These operating parts are covered with a cabin frame 9. The cabin frame 9 also has a function of securing the operator's space in the event that the present crawler tractor falls. In addition, a three-point link type mounting device 10 for mounting various working machines is provided at the rear end of the vehicle.

  The crawler traveling device 1 is supported by a track frame 15. A front differential case 16 is disposed on the front end side of the track frame 15 to support the drive sprocket 11, while an idler (driven sprocket) 12 is disposed on the rear end side. Between the drive sprocket 11 and the idler 12, there are provided equalizers 20 and 20 that swing in the traveling direction (front-rear direction) about the swing shafts 21 and 21. The equalizers 20 and 20 are configured to rotatably support the rolling wheels 13 and 13. Further, the crawler belt 14 is wound around the drive sprocket 11, the idler 12, the rolling wheels 13 and 13 and the like. Since it is configured in this manner, even when the crawler type traveling device 1 travels on unevenness on the field, the equalizers 20 and 20 that support the rolling wheels 13 swing in the traveling direction (front-rear direction). The influence of the unevenness is absorbed, and the large vertical movement of the aircraft is suppressed. Further, the idler 12 may be moved in the traveling direction (front-rear direction) so that the tension of the crawler belt 14 can be adjusted. Further, by providing at least one upper rolling wheel 17 on the upper side of the crawler belt 14, It is possible to prevent the crawler belt from drooping.

<Equalizer 20 top>
Here, a reference example of the rolling wheel 13 will be described with reference to FIG. FIG. 3 is a cross-sectional view of a reference example in which the rolling wheels 13 are viewed from the traveling direction side of the crawler type traveling device 1. Further, the right side of FIG. 3 is the side surface (external side) shown in FIG. 2, and the left side of FIG. 3 is the airframe inner side (airframe side) of the crawler type traveling device 1. In the lower part of FIG. 3, the cross section of the crawler belt 14 to be wound is indicated by a dotted line. The equalizer 20 is composed of two equalizer plates 20a (airframe side) and 20b (external side), and the upper side of the equalizer plate 20 is penetrated by the swing shaft 21 so that the equalizer 20 can be pivoted so as not to be displaced in the axial direction by a bolt 22 or the like. It is fastened. Further, the swing shaft 21 is fixed to a frame (track frame 15) or the like which is a base of the crawler type traveling device 1 such as the track frame 15. With this configuration, the equalizer 20 can swing in the traveling direction (front-rear direction) about the swing shaft 21.

<Lower equalizer 20>
In the lower part of the equalizer 20, shafts 31 and 31 for rotatably supporting the rolling wheels 13 with bearings 42 and the like are provided in parallel in the front-rear direction. The shaft 31 does not directly penetrate the equalizer plates 20a and 20b. Elastic members 30a and 30b are provided at both ends of the shaft 31, and the shaft 32 and the shaft 33 penetrating the equalizer plates 20a and 20b are connected via the elastic members 30a and 30b. The shaft 32 and the shaft 33 are configured to be fastened to the equalizer plates 20a and 20b by nuts 34, 35, and 36. That is, the shaft for supporting the rolling wheel 13 is divided into three shafts 31, 32, and 33, and the divided shafts are connected to each other via elastic members 30a and 30b. Since the configuration is arranged on the center, the shaft 31 can be provided in the equalizer 20. In other words, a plurality of shafts divided in the axial direction are connected via an elastic member. The elastic members 30a and 30b are rubber flexible couplings, vibration-proof rubbers, or the like, and may be any material that is generally known for vibration-proof use. Since it is comprised in this way, since the impact and vibration which the rolling wheel 13 receives are absorbed by this elastic member 30a * 30b, it becomes possible to suppress the vibration transmitted to equalizer board 20a * 20b. Therefore, the impact received by the crawler belt 14 from the running surface is transmitted to the crawler type traveling device 1 via the shaft and the equalizer that supports the rolling wheels 13, and the entire crawler tractor can be prevented from vibrating. .

<Equalizer 90 top>
Next, the structure of the Example of this invention is demonstrated using FIG. In FIG. 4, components having the same functions and effects as those already described with reference to FIG. 3 are assigned the same reference numerals as in FIG. 4A is a cross-sectional view seen from the traveling direction side of the crawler type traveling device 1 as in FIG. 3 of the reference example, and FIG. 4B is a cross-sectional view taken along line A1-A2 in FIG. It is sectional drawing which looked at. The equalizer 90 is composed of two equalizer plates 20a (airframe side) and 20b (external side), and the upper side of the equalizer 90 is penetrated by the swing shaft 21 so as to be rotatable so as not to be displaced in the axial direction by the bolt 22 or the like. It is fastened. Further, the swing shaft 21 is fixed to a frame (track frame 15) or the like which is a base of the crawler type traveling device 1 such as the track frame 15. With this configuration, the equalizer 90 can swing in the traveling direction (front-rear direction) around the swing shaft 21.

<Lower equalizer 90>
A shaft 51 for rotatably supporting the rolling wheel 13 with a bearing 42 or the like is provided at the lower portion of the equalizer 90. The shaft 51 does not directly penetrate the equalizer plates 20a and 20b. Engaging members 52a and 52b are provided in a spline fitting manner at both ends of the shaft 51. On the other hand, the shafts 53 and 54 that can be engaged with the engaging members 52a and 52b are provided as equalizer plates. It is provided so as to penetrate 20a and 20b. The shafts 53 and 54 are provided so as to penetrate the equalizer plates 20a and 20b, and are fastened to the equalizer plates 20a and 20b by nuts 34, 35, and 36. That is, in the engagement between the engaging members 52a and 52b and the shafts 53 and 54, the shafts are connected by engaging the elastic members 60a and 60b between them. That is, as in the case of FIG. 3 of the reference example, a plurality of divided shafts are connected via an elastic member.

  Next, the above engagement will be described in detail. As an example of the above-described engagement, the relationship among the engagement member 52a, the shaft 53, and the elastic member 60a will be described with reference to FIG. As shown in FIG. 5, the engaging member 52 a has a shape having three protrusions 70 a and is fixed to the shaft 51 in a spline fitting manner. Next, the outline of the outer shape of the elastic member 60a is substantially similar to the engaging member 52a, and has a slightly larger shape than the engaging member 52a. In the elastic member 60a, a notch 61a for fitting the engaging member 52a is formed in the same size as the outer shape of the engaging member 52a. The shaft 53 is fitted in the through hole of the equalizer plate 20a, and a notch portion for fitting the shaft portion 53a in which a screw that can be screwed into the nut 34 is cut, and the elastic member 60a in which the engaging member 52a is fitted. The engaging portion 53b is a portion. That is, the outline of the outer shape of the engaging portion 53b of the shaft 53 is substantially similar to the elastic member 60a and has a slightly larger shape than the elastic member 60a. It has become. As described above, the engagement member 52a, the shaft 53, and the elastic member 60a are configured, so that the engagement member 52a is fitted into the notch 61a of the elastic member 60a, and the engagement member 52a is further fitted. The elastic member 60a is engaged by engaging with the engaging portion 53b of the shaft 53. That is, the shaft 51 (including the engagement member 52a) and the shaft 53 are engaged with each other so as to be engaged with each other via the elastic member 60a. Such a configuration is the same for the relationship between the shaft 51, the engaging member 52b, the shaft 54, and the elastic member 60b.

  Since the shaft 51 is configured as described above, the shaft 51 is connected to the shafts 53 and 54 via the elastic members 60a and 60b, and thus is supported by the equalizer plates 20a and 20b of the equalizer 90. That is, the rolling wheel 13 is pivotally supported by the shaft 51 with respect to the equalizer 20. That is, in the configuration shown in FIGS. 4 and 5, as in the case of FIG. 3 of the reference example, the shaft for supporting the rolling wheel 13 includes the shaft 51 (including the engaging members 52 a and 52 b), the shaft 53, And the shaft 54, and the divided shafts are connected to each other by elastic members 60a and 60b. Also, as the elastic members 60a and 60b, as in the case of FIG. Alternatively, any material may be used as long as the material is a vibration-proof rubber or the like, and is generally made of a material known for vibration-proofing. Since it is comprised in this way, since the impact and vibration which the rolling wheel 13 receives are absorbed by elastic member 60a * 60b, it becomes possible to suppress the vibration transmitted to equalizer board 20a * 20b. That is, since the impact received by the crawler belt 14 from the running surface is transmitted to the crawler type traveling device 1 through the elastic member where the shafts supporting the rolling wheels 13 are engaged with each other, the entire crawler tractor is vibrated. It becomes possible to suppress. Further, since the shafts [the shaft 51 (including the engaging members 52a and 52b), the shaft 53, and the shaft 54] are formed into shapes that can be easily engaged with each other, the shafts can be easily engaged with each other. Is possible. Furthermore, since the shafts engage with each other by engaging with each other, the shaft 51 (including the engaging members 52a and 52b), the shaft 53, and the shaft 54 are automatically aligned by the rotation and vibration of the rolling wheel 13. It becomes possible. In this case, since it engages only by meshing | engaging, without using a volt | bolt and a nut, since a number of parts is suppressed, it becomes possible to aim at cost reduction and the work process in a manufacture process can also be simplified.

The external view which showed schematic structure of the crawler tractor which comprises the crawler type traveling apparatus 1 in which the rolling wheel of this invention is used. The side view of the crawler tractor shown in FIG. Sectional drawing of the rolling wheel of a reference example. Sectional drawing which the Example of the rolling wheel of this invention showed. FIG. 5 is an engagement detail view of the shaft of the rolling wheel of FIG. 4.

DESCRIPTION OF SYMBOLS 1 Crawler type traveling device 2 Steering column 4 Bonnet 7 Steering handle 11 Drive sprocket 12 Idler (driven sprocket)
DESCRIPTION OF SYMBOLS 13 Rolling wheel 14 Crawler belt 15 Track frame 20 Equalizer 21 Oscillation shaft 30a, 30b Elastic member 31 Axis 32, 33 Axis 51 Axis 52a, 52b Engagement member 53, 54 Axis 60a, 60b Elastic member

Claims (1)

Between the drive sprocket (11) and the idler (12) constituting the crawler type traveling device (1), an equalizer (90) that swings in the front-rear direction about the swing shaft (21) is provided, and the equalizer Between the two left and right equalizer plates (20a, 20b) constituting (90), there is provided a shaft (51) for rotatably supporting two rolling wheels (13) by bearings (42), Engaging members (52a, 52b) are spline-fitted to both ends of the shaft (51), and engaging shafts (53, 54) corresponding to the engaging members (52a, 52b) are provided. Between the portions where the engageable shafts (53, 54) pass through the equalizer plates (20a, 20b) and the engaging members (52a, 52b) engage with the engageable shafts (53, 54). And the same axis on both sides of the elastic member (60a, 60b) The engaging members (52a and 52b) are connected on the core, and the engaging members (52a and 52b) have three protrusions (70a). The elastic members (60a and 60b) include three engaging members (52a and 52b). A notch (61a) for fitting the projection (70a) is formed, and the engaging shaft (53, 54 ) is fitted with the engagement member (52a, 52b) having the three projections on the engageable shaft (53, 54). An engaging portion (53b), which is a cut-out portion for fitting the members (60a, 60b), constitutes an engaging member (52a, 52b) that is spline-fitted to the shaft (51). Rolling wheels of a crawler type traveling device, wherein the shafts (53, 54) are engaged with each other via elastic members (60a, 60b).

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