JPH0218816Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a side clutch in a mobile agricultural machine. Side clutches in mobile agricultural machinery such as harvesters are generally designed to intermittent power by sliding the side clutch gear on an axle. Most of the side clutch gear parts slide on involute splines, but with this sliding method, when a load is applied, the sliding resistance increases and the side clutch becomes difficult to operate. Because of this inconvenience, a conventional system has been proposed in which a large number of steel balls are interposed between the axle and the side clutch gear to reduce the sliding resistance. However, if a sliding system using steel balls is adopted, a new drawback arises in that the steel balls and side clutch gear may fall off from the axle during assembly, resulting in poor assembly workability.

Therefore, the present invention provides a side clutch for a mobile agricultural machine in which a steel ball is interposed on the axle and a side clutch gear is slidably fitted only in the axial direction.
On the above axle, a ring made of two steel balls to prevent slipping is always fitted in a part located within the width of the sliding surface of the side clutch gear with respect to the axle. The sliding surface of the side clutch gear is configured to hold the ring to prevent it from slipping off even when the side clutch gear is in the correct position, and a protrusion to prevent the side clutch gear from slipping out is integrally provided on the inner end of the axle. , which reduces the sliding resistance of the side clutch gear so that the side clutch can be operated easily at all times, while also reliably preventing steel balls, side clutch gears, etc. from falling off during assembly. It is an object of the present invention to provide a side clutch for a mobile agricultural machine which can significantly improve performance, have a simple structure, and be manufactured at low cost.

To explain the structure of the present invention with reference to an embodiment shown in the drawings, 1 is a harvester in which a traveling body 3 having a crawler traveling device 2 is mounted with a threshing machine 4, an engine 5, etc., and the power of the engine 5 is The signal is transmitted via a group of gears in a transmission case 6 to an axle 8 to which a rear drive wheel 7 is fixed, and drives the crawler traveling device 2. Reference numeral 9 denotes an axle holder fixed to the transmission case 6, and a claw 9a is formed at the inner end of the axle holder. 10 is a pusher, 11 is a center pin, and the center pin 11 is
An axle gear 12 that is constantly engaged with a drive-side gear (not shown) in the transmission case 6 is press-fitted into and fixed to the transmission case 6 .

A side clutch gear 13 is fitted to the axle 8 so as to be slidable within a predetermined range only in the axial direction, and has a pawl 13a at its outer end that engages with the pawl 9a, and a side clutch gear 13a that engages with the pawl 9a at its inner end. Teeth 13b that mesh with the internal teeth 12a of the gear 12 are formed.

Semicircular grooves 8' and 13' are provided on the sliding surfaces of the axle 8 and the side clutch gear 13 at predetermined intervals in the circumferential direction, respectively.
A plurality of steel balls 14 are fitted into each of the holes 3'.

Reference numeral 15 denotes a ring for preventing the steel balls 14 from slipping, and this ring 15 is formed in two from a highly elastic member as shown in FIG. The ring 15 formed in two halves is always fitted to a predetermined portion of the axle 8 so as to be located within the width of the sliding surface 13d of the side clutch gear 13 with respect to the axle 8. The sliding surface 13d of the side clutch gear 13 is configured to hold the anti-slip ring 15 from the outside at any position within the allowable sliding range. 8a is ring 1
This is the groove into which 5 is inserted.

16 is a protrusion to prevent the side clutch gear from slipping out,
This protrusion 16 is integrally provided on the inner end of the axle 8 so as to project therefrom. 17 is a liner, 18 is a C ring, and a spring 19 is interposed between the liner 17 and the C ring 18.

In the figure, 8b is a lubricating oil communication hole, and 13c is a groove into which a side clutch shifter S (see FIG. 6) is fitted.

Figure 6 shows the structure of the mission case 6. This mission case 6 is a split-type mission case made by joining the left and right case members in a joined shape. The shape is the same on both sides. A reinforcing wall 6b is integrally provided on the inner surface of the case around the oil filler port 6a.
As shown in FIG. 7, this reinforcing wall 6b
This structure protrudes from the inside of the transmission case 6 to block and close it at an appropriate distance and maintains a wrap amount D. This structure protects the transmission case 6, especially the part near the oil filler port 6a, which has been weakened in strength by drilling. In addition to achieving a reinforcing effect, consideration is given to reliably preventing oil (lubricating oil) scattered by the rotation of the gears in the case 6 from blowing out from the breather hole 6'c provided in the oil filler plug 6c. 20 is a speed change shifter, and 21, 22, and 23 are gear groups.

In the above configuration, when the side clutch is operated, the steel balls 14, 14... roll in the grooves 8, 13', so the sliding resistance of the side clutch gear 13 is greatly reduced, and the side clutch is always operated. It can be done easily.

Also, a side clutch gear 13 is always attached to the axle 8.
A slip-preventing ring 15 of a steel ball 14 formed in two is fitted to a portion located within the width of the sliding surface 13d relative to the axle 8, and the side clutch gear 13 is positioned within the allowable sliding range. Even if the sliding surface 13d of the side clutch gear 13 is attached to the ring 1 for preventing slipping,
A protrusion 1 is provided at the inner end of the axle 8 to prevent the side clutch gear 13 from slipping out.
6 is integrally protruded, it is possible to reliably prevent the steel balls 14 and the like from falling off and the side clutch gear 13 from being pulled out from the axle 8 during assembly. As a result, when assembling, the axle 8, side clutch gear 13, steel balls 14, ring 15, liner 17,
Each part surrounding the side clutch, such as the C pin 18 and the spring 19, can be assembled as a subassembly, thereby significantly increasing the efficiency of assembly.

By the way, since the ring 15 is formed in two parts, it can be easily fitted into the groove 8a from the outside of the axle 8 one by one, and it will not be forced to cross the protrusion 16 as in the case of a single ring shown in FIG. The ring 15 can be used as a side clutch gear, since there is no risk of permanent deformation caused by enlarging the diameter of the ring 15, and the split structure of the ring 15 weakens the clamping force on the axle 8, making it easier to pull out. 13
Since the ring 15 is always held and protected from the outside by the sliding surface 13d relative to the axle 8, the ring 15 is reliably prevented from deviating from the axle 8 and the steel ball 14 is prevented from being pulled out due to the ring 15 deviating from the axle 8. . Therefore, failures and malfunctions of the side clutch due to deviation of the ring 15, etc. are eliminated, and the easy operability of the side clutch by the steel balls 14 is maintained for a long period of time.

As described above, the present invention provides a side clutch for a mobile agricultural machine in which a steel ball is interposed on the axle and a side clutch gear is slidably fitted only in the axial direction. A slip-preventing ring made of two steel balls is fitted to the part located within the width of the sliding surface relative to the axle, and the side clutch gear is prevented from sliding no matter where the side clutch gear is located within the allowable sliding range. The sliding surface is configured to hold the anti-slip ring, and
Since a protrusion for preventing the side clutch gear from coming off is integrally provided on the inner end of the axle, the sliding resistance of the side clutch gear is reduced, and the side clutch can be operated easily regardless of the load. Although it can improve operability,
This has resulted in the following effects. In other words, the ring to prevent the steel balls from slipping off can be easily fitted one by one from the outside of the axle, and the ring and the protrusion that prevents the side clutch gear from falling off ensure that the steel balls, side clutch gear, etc. do not fall off. Therefore, when assembling, it becomes possible to assemble each part surrounding the side clutch gear, such as the steel balls and the side clutch gear, into the axle as a subassembly in advance, and the work efficiency of the assembly can be significantly improved.

Not only does this eliminate the risk of permanent deformation of the ring due to unreasonable force when it crosses the protrusion that prevents the clutch gear from slipping off like a single ring, but it also eliminates the possibility of permanent deformation of the ring due to unreasonable force when passing over the protrusion that prevents the clutch gear from coming out, as opposed to a single ring. The ring, which has weakened and tends to come off easily, can be protected by being constantly held from the outside by the sliding surface of the clutch gear against the axle, ensuring that the ring does not come off and the steel ball does not come out due to the ring coming off. This makes it possible to eliminate failures and malfunctions of the side clutch, maintain the light operability of the side clutch using steel balls over a long period of time, and provide a high-quality side clutch device.

The protrusion for preventing the side clutch gear from coming off can be formed at the same time when machining the axle.The structure is simple, and there is no need for a separate member such as a stopper tube for preventing the side clutch gear from coming off, reducing the number of parts. Since the process of press-fitting and fixing is also unnecessary, costs can be reduced.

[Brief explanation of drawings]

Fig. 1 is a schematic side view of a harvester equipped with the present invention, Fig. 2 is a partially cutaway sectional view of the main parts, Fig. 3 is a sectional view of the sliding part of the side clutch gear of the axle, and Fig. 4 is a schematic side view of a harvester equipped with the present invention.
The figure is a sectional view taken along the line A-A in Figure 2, Figure 5,
6 is a front view showing the shape of a ring for preventing the steel balls from falling off, FIG. 6 is a side view showing the structure of the transmission case, and FIG. 7 is a sectional view taken along the line B--B in FIG. 6. In the figure, 8 and 8 are axles, 13 is a side clutch gear, 14 and 14 are steel balls, 15 is a ring, and 16 is a protrusion.

Claims (1)

[Scope of utility model registration request] In a side clutch for a mobile agricultural machine in which a steel ball is interposed on the axle and a side clutch gear is slidably fitted only in the axial direction, the axle always has a side clutch gear within the width of the sliding surface of the side clutch gear relative to the axle. A slip-preventing ring made of a steel ball split into two is fitted to the part located at the position of the slip-preventing ring. A side clutch for a mobile agricultural machine, characterized in that it is configured to be held in place and has a protrusion integrally protruding from the inner end of the axle for preventing the side clutch gear from coming off.