JPH079744Y2 - Axle bearing holder structure for cultivators etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an axle bearing holder structure in a cultivator or the like in which an axle can be operated by an axle bearing holder portion of a mission case.

[Problems to be solved by conventional techniques and devices]

Conventionally, in agricultural work machines such as cultivators and management machines, a side clutch is provided on a gear shaft with a high rotational speed and a small torque in the mission case above the axle to reduce the operating force of the side clutch, and this operation is performed via a wire. The side clutch lever on the steering wheel is used. Therefore, the link mechanism in the mission case is different for each model, the structure is complicated, the number of parts is increased, and the cost is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems and has been made in order to improve the problems. Therefore, an axle operation such as a side clutch or a differential mechanism (hereinafter referred to as a differential) lock can be directly performed by an external operation. Therefore, it is an object of the present invention to provide an axle bearing holder structure for a cultivator or the like, which has a simple structure and can always use the same mission case in common even if the models are different, and the cost can be reduced.

[Means for solving problems]

The technical means taken by the present invention to achieve the above object are:
An axle bearing holder is detachably provided on the outer side of the transmission case formed into two halves, and a protrusion is formed on the axle bearing holder so as to extend upward, and the protrusion is provided in a vertical direction for axle operation. The link shaft is rotatably supported.

[Action]

Therefore, according to the present invention, the axle bearing holder can be easily attached to and detached from the outside of the mission case, and the rotatable link shaft supported by the protruding portion of the axle bearing holder allows the axle shaft to be directly attached to the outside of the mission case. Since it can be operated, it is not necessary to provide a complicated link mechanism, an operation wire, or the like inside the mission case or the axle. Therefore, even if the model is different, only by replacing the axle bearing holder, the mission cases of the same shape can always be used in common, the structure is simplified, and the cost can be greatly reduced.

〔Example〕

 Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

FIG. 1 is a longitudinal sectional view of a side clutch of a cultivator to which the present invention is applied, FIG. 2 is a plan view of an A portion shown by an arrow in FIG. 1, and FIG. 3 is an overall side view of a cultivator to which the present invention is applied. So in the figure 2
Is an engine of the cultivator 1, 3 is a power transmission unit, 4 is a transmission case, 5 is an axle bearing holder of the transmission case 4, 6 are wheels, 7 is a main gear shift lever, 8 is a handlebar, 9
Is a rotary.

The transmission case 4 is formed in a split shape by a steel plate press structure, a multi-stage transmission gear device 10 is built in the upper portion thereof, an axle 11 is in the lower portion, and an axle fixed to the outside of the transmission case 4 with bolts and nuts 12. It is supported by a roller bearing 13 held by the bearing holder 5.

The axle 11 is divided into left and right parts at the center, and each axle 11 is provided with a side clutch 14. That is, the side clutch 14 has a sleeve 15 that straddles the central divisions of the left and right axles 11.
Is loosely fitted, and the final sprocket 18 connected to the output shaft sprocket 16 of the multi-stage transmission gear device 10 via a chain 17 is mounted on the sleeve 15, and drive-side male splines 15a are formed at both ends. On the other hand, a driven-side male spline 11a is formed on the axle 11, and a female spline 19a formed on the clutch actuating portion 19 is inserted into and removed from the driving-side and driven-side male splines 15a, 11a, respectively.
Or the one of the axles 11 is released from the connection with the sleeve 15 so that both the left and right axles 11 are connected.
The power is transmitted to and released from both or one of the two.

Reference numeral 20 in the figure denotes a spring that constantly urges the operating portion 19 of the side clutch 14 in the clutch engaging direction.

The axle bearing holder 5 is made of cast metal, and a mounting portion 5a of the link shaft 21 for operating the side clutch 14 is integrally formed on a protrusion provided on the bearing holder 5, and the vertical link mounted on the mounting portion 5a. The eccentric pin 21a formed on the inner end of the shaft 21 is engaged with the engaging groove 19b formed on the outer periphery of the operating portion 19 of the side clutch 14, and the link shaft 21
An operation lever 21b is attached to the outer end of the.

The side clutch 14 above operates the operating lever 21b from the outside of the machine body to rotate the link shaft 21, and as shown on the left side of FIG. When moved to the dead center, the operating portion 19 moves toward the inside of the aircraft, and its female spline 19a engages with the male spline 11a of the axle 11 and the male spline 15a of the sleeve 15 at the same time,
The axle 11 and the sleeve 15 are integrally connected, and power is transmitted from the sleeve 15 to the axle 11. Further, as shown in the right side of FIG. 1, when the link shaft 21 is rotated against the urging force of the spring 20 and the eccentric pin 21a is moved to the dead point outside the machine body, the operating portion 19 is moved outside the machine body. Move that female spline 19a
And the engagement of the sleeve 15 with the male spline 15a is disengaged, the axle 11 becomes free with respect to the sleeve 15, and the power transmission from the sleeve 15 to the axle 11 is released.

Therefore, by turning on both the left and right side clutches 14 and transmitting the driving force to both the left and right axles, a reliable driving force at the time of tilling can be obtained and the workability of the tiller 1 can be improved.
Further, when turning, the turning operation can be facilitated by disengaging either the left or right side clutch 14 to release the driving force of one axle. The above-mentioned axle operation is performed by the link shaft mounted on the axle bearing holder 5.
Since the operation is performed by the external operation of 21, it is not necessary to provide a complicated link mechanism, an operation wire, or the like inside the mission case or the axle, and the configuration is simplified, and the cost can be significantly reduced.

Reference numeral 22 in FIG. 3 is a sickle, the details of which are shown in FIG. 4, and the main shift lever 7 is connected to the body side lever 7a and the operation side lever.
7b is divided into two parts, which are connected and separable by a joint pipe 23 and a pin 24 so that the joint side end of the operating side lever 7b has a sickle 22.
In addition, the pin 24 is positioned so that the blade edge of the sickle 22 faces upward when the operation side lever 7b is connected.

With this sickle 22, it is not necessary to search for a sickle each time to remove grass and straw that have been wound around the rotary etc. of the tiller, and it is now possible to easily remove grass and straw and the like. As shown in the figure, the cutting edge of the sickle 22 serves as an indicator of the gear shift position of the gear shift guide plate 25, so that the gear shift position can be reliably determined.
It is possible to prevent obstacles such as disengagement of gears and lack of gear teeth due to half-engagement of the speed change gear.

FIG. 6 shows an embodiment in which the present invention is applied to a lock mechanism of a bevel gear type differential, in which the same members as those in the above embodiment are designated by the same reference numerals.

The axle bearing holder 5 of the structure of the present invention is used on one side of the mission case 4, the other side is a normal axle bearing holder 5 ', and both are equipped with a double roller bearing 13 for heavy load.

Numeral 26 is a bevel gear type differential which is formed in the differential case 27, and both ends of the differential case 27 are axially supported inside the transmission case 4 by both axle bearing holders 5 and 5'via differential case bearings 28.

The diff lock mechanism 29 is configured almost the same as the side clutch 14 of the previous embodiment, and the link shaft 21 is rotated by an external operation to move the eccentric pin 21a from the body outer dead point to the body inner dead point. Actuator 30 of the diff lock mechanism 29 having a female spline 30a that engages with the male spline 11a of the axle 11.
Is slid toward the inside of the body by the urging force of the spring 31, and the engaging claw 30b formed on the end face of the actuating portion 30 shown in FIG. 7 engages with the engaging claw 27a of the differential case 27 which faces the engaging claw 30b. 26 is locked.

On the contrary, the link shaft resists the urging force of the spring 31.
By rotating 21 to move the eccentric pin 21a from the dead center inside the machine body to the dead center outside the machine body, the operating portion 30 is moved to the spring 31.
It slides to the outside of the machine body against the urging force of, and its engaging claw 30b and the engaging claw 27a of the differential case 27 are disengaged to release the diff lock.

In the above structure, the diameter d ₁ of the axle bearing holders 5, 5'mounting holes 4a of the transmission case 4 is made larger than the outer diameter of the differential case bearing 28. In other words, by doing so, in the case of the differential case with the differential case of FIG. 6 having the differential case bearing, the model without the differential lock with the differential case and the side clutch of the embodiment of FIG. By using a common mission case for various models and adopting only axle bearing holders that are compatible with various models, it is possible to support various models, simplifying the structure and improving productivity and cost reduction. It can be achieved.

FIG. 8 shows a cultivator in which an automatic diff lock device is attached to the diff lock mechanism 29 of the embodiment shown in FIG.
Reference numeral 32 denotes a machine body tilt detector which is rotatable about the support shaft 33 in the longitudinal direction of the machine body, and 34 denotes an upper end of the machine body tilt detection tentacle 31 and an operation lever 21b of an axle operation link shaft 21 mounted on the axle bearing holder 5. A buffer wire 35 is interposed in the middle of the connecting wire for connecting the above, and an automatic differential lock device 36 is constituted by these. The body inclination detector 32 may be of a cane type or a wheel type as shown in the figure, and may be of any type.

Therefore, the cultivator 1 has the handle 8 when moving without cultivating.
Lifting and moving the rotary 9 slightly above the ground surface (the positional relationship of the ground surface when moving is I in the figure), the handle 8 is pushed down during the plowing work and the rotary 9 is put under the ground surface. (The positional relationship of the ground surface during plowing is shown in the figure.
II), when turning at the end point of plowing, raise the handle 8 greatly and tilt the aircraft 1 forward (the relationship of the ground surface when turning is III in the figure).

Here, the inclination of the airframe with respect to the ground surface is small at the time of movement and tillage, the airframe inclination detector 32 is at the position indicated by the two-dot chain line in the figure that does not contact the ground surface I or II, and the link shaft 21 is at the diff lock position. Therefore, the diff 26 is locked and the left and right axles 6 are driven equally.

When the handle 8 is largely lifted to rotate the cultivator 1 and the vehicle body 1 is moved forward much, the ground surface is located at the position III relative to the vehicle body 1, and the vehicle body inclination detector 32 is shown on the ground surface. Pushed up to the solid line position, the link shaft 21 is rotated to the differential release position via the connecting wire 34,
26 is unlocked. Therefore, the left and right wheels 6 when cultivating
A reliable driving force can be obtained by means of which the workability is improved, the left and right wheels 6 are differentially turned during turning to facilitate turning, and the diff 26 is locked and released by interrupting the operation of the cultivator. In addition, since it can be automatically performed only by the tilting operation of the machine body, the work can be performed extremely flexibly.

FIG. 9 shows a mission case 4 incorporating a spur gear type diff 37. The cover 38a of the diff case 38 of this spur gear type diff 37 is also used as the final sprocket 18 of the drive system.

Conventionally, the diff case consists of a case body that houses the diff mechanism and a cover, and there is no diff mechanism that incorporates the diff mechanism in a part of the diff case. However, the above structure makes the diff mechanism compact, reduces the number of parts, and reduces the weight. Reduction is achieved, and it is possible to reduce costs. The differential case cover is not limited to the final sprocket, but may be the link gear of the differential mechanism.

[Effect of device]

In short, according to the present invention, the axle bearing holder is detachably provided on the outer side of the transmission case which is formed into two parts, and the axle bearing holder is formed with a protruding portion which is directed upward. Since the vertical link shaft for axle operation is rotatably supported, the axle shaft can be directly operated from the outside of the mission case by the rotatable link shaft supported by the axle bearing holder. It is not necessary to provide complicated link mechanism or operation wire on the inside or the axle. Therefore, the axle bearing holder can be used with or without the side clutch and the differential mechanism in the mission case. The mission cases of the same shape can be used in common by simply replacing the Width cost down is possible.

[Brief description of drawings]

1 to 3 and 6 to 8 show an embodiment of the present invention, FIG. 1 is a longitudinal sectional view of a side clutch of a cultivator to which the present invention is applied, and FIG. 2 is FIG. Fig. 3 is a plan view of a portion A of Fig. 3, Fig. 3 is an overall side view of the same cultivator, Fig. 4 is a side view of a main shift lever part of the same cultivator, and Fig. 5 is B- in Fig. 4.
FIG. 6 is a vertical sectional view of an embodiment in which the present invention is applied to a lock mechanism of a bevel gear type differential, and FIG. 7 is an enlarged engagement claw portion of the differential lock mechanism of FIG. 6 embodiment. Figure, 8th
FIG. 9 is a side view of the entire cultivator in which an automatic diff lock device is attached to the diff lock mechanism of the embodiment shown in FIG. 6, and FIG. 9 is a proposed longitudinal section in which the cover of the diff case of the spur gear type diff is also used as the final sprocket of the drive system It is a figure. 1 ... Tiller, 4 ... Mission case, 5 ... Axle bearing holder, 5a ... Link shaft mounting part, 11 ...
Axle, 12 ... Link shaft.

Claims (1)

[Scope of utility model registration request] 1. An axle bearing holder is detachably provided on the outer side of a transmission case formed into two halves, and a protrusion is formed on the axle bearing holder so as to be directed upward. An axial bearing holder structure for a cultivator or the like, in which an up-and-down link shaft for a vehicle is rotatably supported.