JPS5940589Y2 - clutch brake device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clutch brake device, particularly a side clutch device for mobile agricultural machinery.

Conventionally, a side latch device for a mobile agricultural machine having this type of clutch brake device has a power transmission shaft 1 as shown in FIG.
The drive gear 3 is fitted into the drive gear 3 and the power is transmitted from the manual pulley 2 via the gear train, and the transmission shaft 1 is fitted into the drive gear 3.
and both gears 6, 6 fixed to both axle shafts 5°5
Power is transmitted by meshing one end of the slide gears 7, 7, which are always in mesh with each other, through gear serrations or pawl clutches 8, 8, or by sliding the slide gears 7. The brake is applied by disengaging the slide gears 7, 8 and further engaging the claw clutch 10.10 provided at the other end of the slide gears 7, 7 with the fixed claw 11.11 formed on the gear case 11.11. was.

At this time, the slide gears 7, 7 have gear serrations of 8°8.
, the reaction force of power transmission is received at the meshing part with the gears 6, 6 and the fitting part with the transmission shaft 1, and a considerably large operating force is required to slide the slide gears 7, 7 against these forces. I needed it.

In addition, the stroke for sliding the slide gear 7 requires a depth of engagement between the gear serrations 8 and the pawl clutch 10, and in order to prevent the drive section and the brake section from engaging at the same time, a neutral He needed a zone and a pretty big stroke.

Furthermore, since a large operating force is required, the lever ratio to the clutch lever cannot be made small, and the operating stroke of the clutch lever becomes large, making operation cumbersome.

Therefore, the present invention has a driving member and a passive member,
and one of these two members is a shaft-like member, and the other is a hollow member fitted to the shaft-like member, the hollow member has a ball holding hole, and the shaft-like member has a ball holding hole. Notches are provided at corresponding positions, and a braking member made of a shaft-like member or a hollow member similar to the driving member is disposed adjacent to the driving member, and the notch or ball holding hole of the braking member is provided. Correspondingly, ball holding holes or notches are provided in the passive member, balls are held in the respective ball holding holes, and a small diameter portion and a small diameter portion are provided that engage the balls in the notches by slidingly contacting each ball. A sliding member having a large diameter portion on its inner diameter side that releases the engagement is arranged so as to surround the hollow member, and by sliding the sliding member, the ball is moved into and out of the notch. It is an object of the present invention to provide a latch brake device in which the passive member is configured to be able to be switched freely between driving, idling, and braking states, and which does not require a large operating force, suffices with a small stroke, and is easy to operate. That is.

Hereinafter, an embodiment in which the present invention is applied to a side clutch for a mobile agricultural machine will be described based on FIGS. 2 to 6.

The transmission shaft 12, that is, the portion corresponding to the reference numeral in FIG. 1, is rotatably supported by the transmission case 13 by a ball bearing 15.

Drive gears 1 are mounted on the transmission shaft 12 by splines, respectively.
6 and a driving member 17 are fixed, and a passive member 18 is rotatably fitted loosely thereto.

Further, a cylindrical braking member 20 is provided surrounding the transmission shaft 12.
is fixed to the mission case 13.

The passive member 18 has two rows of four ball holding holes 21 in each row.
Each of the ball holding holes 21 and 22 holds driving and braking balls 24 and 25, each having a diameter slightly larger than the depth of the holding holes 21 and 22. 6 Also, the driving member 17 and the braking member 20 at positions corresponding to the respective ball holding holes 21, 22 are provided with conical or prismatic notches 26, 27, respectively.
are drilled, and each notch 26.27 has a ball 24.
．． 25 can be engaged or disengaged.

Furthermore, the passive member 18 has a gear 28, and the gear 2
8 meshes with a gear 30 (corresponding to the reference numeral 6 in FIG. 1) fixed to the axle shaft.

Further, a sliding member 31 is arranged so as to surround the passive member 18, and the sliding member 31 is interlocked with the clutch lever.
It can slide against the spring 32 compressed between the brake member 20 and the brake member 20 .

On the other hand, the inner diameter side of the sliding member 31 has a large diameter part 31a at the left and right ends, a small diameter part 31b at the center of 31a, and inclined parts 31c, 31c connecting them, and each part has a ball 24. It is in sliding contact with 25.

Since this embodiment has the above configuration, when the sliding member 31 moves to the left as shown in FIG. 2 and its small diameter portion 31b is in contact with the ball 24, as shown in FIG. As shown, the driving ball 24 is inserted into the holding hole 21 of the passive member 18.
The notch 26 of the driving member 17 is engaged with the notch 26 of the driving member 17.

Therefore, the power from the driving gear 16 is transmitted to the driving member 17 via the transmission shaft 12, and further transmitted via the ball 24, the passive member 18, and the gear 28 to the gear 30 fixed to the axle shaft.

At this time, as shown in detail in FIG. 4, the braking ball 25
is located in the large diameter portion 31C of the sliding member 31, so that the holding hole 22 and the large diameter portion 31c of the sliding member 31 are projected outward by centrifugal force based on the rotation of the passive member 18.
The ball 25 is held by the braking member 20.
Since it is removed from the notch 27, rotation of the passive member 18 is not hindered.

Next, as shown in FIG. 5, when the sliding member 31 is moved to the right, each ball 24, 25 both has a large diameter portion 31a,
31a, and is in a neutral state.

In this state, both balls 24 and 25 are connected to the driving member 17.
The passive member 18 is not engaged with the notches 26 and 27 of the braking member 20, and is in an idle state where it rotates freely.

Furthermore, as shown in FIG. 6, when the sliding member 31 is moved to the right, the braking ball 25 is guided by the inclined portion 31c of the sliding member 31 and inserted into the holding hole 22, and the ball 25
is located in the small diameter portion 31b, the ball 25
engages with the notch 27 of the braking member 20.

In this state, the passive member 18 is fixed to the braking member 20 via the ball 25, and the axle shaft is braked via the gears 28 and 30.

Next, based on FIG. 7, another embodiment similarly applied to a side clutch for a mobile agricultural machine will be described.

Passive members 35 and 35 consisting of left and right axle shafts (corresponding to the reference numeral 5 in FIG. 1) are each rotatably supported by an axle housing 36 fixed to the transmission case 13.

A cross-driving member 37 is loosely fitted into both of the passive members 35.35, and a braking member 38.38 is fixed to the transmission case 13 so as to surround each of the passive members 35.35.

The drive member 37 is a gear 40 (reference numeral 3 in FIG.
), and also has left and right passive members 35.3
The boss portion located at 5 has a ball holding hole 41.4, respectively.
1 is drilled.

Each braking member 38.38 also has a ball holding hole 42.
42 are bored, and each holding hole 41.42 holds a driving and braking ball 44, 45 having a diameter slightly larger than its depth.

Further, sliding members 46, 46 having a large diameter portion 46a, a small diameter portion 46b, and an inclined portion 46c similar to those in the previous embodiment are arranged so as to be in sliding contact with each ball 44, 45. 46.46 is slidable by a clutch lever against a spring 47.47.

In addition, each ball holding hole 41.4 of each passive member 3535
2 are provided with notches 48, 49 in the same number as balls 44, 45, respectively.

In this embodiment, the power is directly transmitted from the manual pulley to the gear 40 via the gear train.
The transmission shafts 1 and 12 in the figures and the previous embodiments are not required.

Since this embodiment has the above-mentioned usurpation, when the sliding member 46 is located on the left side as shown on the right side of FIG. Since the braking ball 45 is located in the large diameter portion 46b, the ball 44 is engaged with the notch 48, and the ball 45 is disengaged from the notch 49.

In this state, the rotation of the driving member 37 transmitted by the gear 40 is transmitted to the passive member 35, which is an axle shaft, via the ball 44, and the clutch is connected.

Further, when the sliding member 46 is located on the left side as shown in the left side of FIG. is located, the ball 45 engages with the notch 49,
The ball 44 has left the notch 48.

Therefore, the passive member 35 is fixed to the braking member 38 by the ball 45, and the brake is applied.

As explained above, according to the present invention, the sliding member 31.
The resistance received when 46 slides is 24.25°44,
There is only frictional resistance due to the radial force of the ball trying to exit from the notch 26, 27, 48, 49 and the force trying to sink the ball into the notch, and these forces are also extremely weak due to point contact or rolling contact with the ball. Since the force is small, the operating force can be made very small.

Furthermore, by reducing the spacing between the small diameter portions 31b, 46b and the ball holding holes 21, 22, 41, 42, the neutral zone can be set extremely small, and the operating force is also small, making it possible to reduce the clutch lever ratio. Since it can be made small, the operation stroke of the clutch lever can be made small, making operation very easy.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional side clutch brake device, Fig. 2 is a sectional view showing a clutch connected state according to the present invention, Fig. 3 is a sectional view taken along line III-III in Fig. 2, and Fig. 4 is Figure 2 is a sectional view taken along the line ■-N, Figure 5 is a diagram similar to Figure 2 showing the idling state, Figure 6 is a diagram similar to Figure 2 showing the braking state, and Figure 7 is a diagram showing other implementations. It is a sectional view showing an example. 17, 37... Drive member, 18.35...
... Passive member, 20, 38... Braking member, 21.22.41.42... Ball holding hole,
24.25.44.45・・・Ball, 26.2
7゜48, 49...notsuchi, 31.46...
...Sliding member, 31a. 46a...Large diameter part, 31b, 46b...
・Small diameter part, 31C246c... Slope part.

Claims (1)

[Scope of utility model registration request] It has a driving member and a passive member, one of these members is a shaft-like member, and the other is a hollow member rotatably fitted to the shaft-like member, and the hollow member has a ball holding member. A hole is provided in the shaft-like member, and a notch is provided in the shaft-like member at a position corresponding to the ball holding hole, and a braking member made of a shaft-like member or a hollow member similar to the driving member is arranged adjacent to the driving member. , ball holding holes or notches are provided in the passive member to correspond to the notches or ball holding holes of the braking member, balls are held in the respective ball holding holes, and the balls are held in sliding contact with each ball. A sliding member having a small diameter portion that engages with the notch and a large diameter portion that releases the engagement on the inner diameter side is disposed so as to surround the hollow member, and the sliding member is arranged so as to surround the hollow member. A clutch/brake device in which the ball is moved in and out of the notch so that the passive member can be freely switched between a driving state, an idling state, or a braking state.