JPH0679692U - Brake device for passenger work equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention is capable of braking front wheels by operating side brakes of rear wheels in an agricultural working machine, and has a simple structure to reduce the size and weight of a rear wheel drive unit. That is the purpose. In a passenger working machine having left and right rear wheel drive units equipped with a friction clutch type side clutch A and a side brake, respectively, clutch shafts 30, 30 are provided on both sides of a distribution shaft 23 driven by a rear wheel input shaft 22, respectively. Are arranged in series with the same axis, and a lock clutch that locks at least one clutch shaft 30 with respect to the distribution shaft 23, the left and right side clutches A, and the left and right side brakes B are arranged on the same axis. A traveling power transmission device for the installed work equipment.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a brake device for a riding work machine in which a drive unit for the left and right rear wheels is equipped with a friction clutch type side clutch and a side brake.

[0002]

[Prior art]

 BACKGROUND ART Conventionally, a riding work machine in which a drive unit for the left and right rear wheels is equipped with a friction clutch type side clutch and a side brake is already known.

[0003]

[Problems to be solved by the device]

 When the vehicle is stopped, the known riding work machine is configured such that the left and right side clutches are disengaged before the side brakes are braked.Therefore, when the vehicle is stopped on a slope, only the rear wheels are braked. Since the front wheels become free, slipping on the front wheels, such as on a downhill, caused slipping and was dangerous. When the side clutch was used as a pawl clutch, the intermittent power supply was not smooth. In order to solve such a problem, the side clutch is made friction type in order to stop the aircraft, and when the clutch pedal and the left and right clutch pedals are stepped on, the side clutch shaft becomes integral with the distribution shaft that transmits to it. As shown in Fig. 9, the clutch shaft is supported at a position lower than the distribution shaft, the distribution shaft and the clutch boss are arranged to be transmitted by gears, and the lock clutch between the clutch boss and the clutch shaft is interposed. As the rear axle case becomes larger and the cost becomes higher, the work equipment is usually connected to the rear part of the riding work machine, so the weight of the rear part of the machine body becomes large and the machine body heads up due to the reaction force. So the aircraft became unstable.

[0004]

[Means for Solving the Problems]

 The present invention is a passenger work machine equipped with a friction clutch type side clutch and a side brake on the left and right rear wheel drive parts, and the clutch shafts are provided on both sides of the distribution shaft driven by the rear wheel input shaft. In the same manner, the distribution shaft, the lock clutch that locks at least one clutch shaft to the distribution shaft, the left and right side clutches, and the left and right side brakes should be arranged on the same axis. Has solved the above-mentioned problems.

[0005]

[Action]

 When correcting the traveling direction during work, if one of the brake pedals is lightly depressed, the side clutch linked to it is disengaged and the traveling direction is corrected. Also, when stopping the aircraft, if you depress the clutch pedal and both brake pedals, the left and right side clutches will be disengaged, the side brakes will operate, and the lock clutch will operate, so that the clutch shaft and the distribution shaft are integrated. It is possible to brake the rear and front wheels. Since the friction clutch type side clutch, side brake, and lock clutch are arranged on the same axis as the distribution shaft and clutch shaft in series, the configuration is significantly simplified, downsized, and lightweight. I was able to

[0006]

【Example】

 An embodiment of the present invention will be described with reference to the riding rice transplanter shown in the drawings. The front wheels 2 and 2 are supported on both sides of the front part of the machine body 1, and the rear wheels 3 and 3 are supported on both sides of the rear part of the front wheel 2, 2. A mission case 4 is arranged in between, an engine 5 is mounted on the upper part of the mission case, a driver's seat 6 is provided on the upper part near the rear part, and a planting device 8 is lifted and lowered by a top link 9 and lower links 10, 10 on a column 7. Connected as possible.

A main clutch 12 is mounted on the input shaft 11 of the mission case 4, and a gear attached to the cylinder shaft is connected to a traveling transmission system and a work machine transmission system so that the work machine transmission shaft 13 is a planting device. 8 is transmitted to the ring gear 18 of the front wheel differential mechanism 17 mounted on the front wheel drive shafts 16 and 16 and the bevel gear at the front end of the rear wheel transmission shaft 20. The rear end of the rear wheel transmission shaft 20 is connected to a rear wheel input shaft 22 protruding forward from the rear axle case 21 by a coupling.

A bevel gear 24 a attached to the intermediate distribution shaft 23 in the rear axle case 21 meshes with a bevel gear 24 b attached to the rear end of the rear wheel input shaft 22 described above, and both ends of the distribution shaft 23 are connected to each other. Of the claw clutches 25 and 25a engaged so as to rotate integrally with each other, only the claw clutch 25 on the right side slides in the axial direction, and is compressed and biased toward the rear wheel input shaft 22 side by the compression spring 26. , The claw is thick in the radial direction and long in the axial direction. On the outside of the claw clutches 25, 25a, passive claw clutches 27, 27a that are constantly meshed with the claw clutches 25, 25a are mounted, and at the boss portion, a friction plate 28, which is a component of the side clutch A composed of a friction clutch, For example, the clutch case 31 spline-fitted as shown in FIG. 5 is rotatably loosely fitted to the clutch shaft 30 on which the passive pawl clutch 27, 27a is fitted. The friction plate 33, which has two cutout grooves 32 and slidably fits the protrusions 32a on the outer periphery into the cutout grooves 32, has the inner end received by the ring 34. In this state, the disc springs 35 are interposed between the friction plates 28, ... And are pressed and urged by two disc springs 35 via a spacer 36 that abuts on the body mounting portion 30a of the clutch shaft 30.

A groove 37 formed on the outer periphery of the boss portion 31a extending outward from the clutch case 31 is provided with a protrusion on the inner periphery of a friction plate 38, which is a constituent element of the side brake B which is a friction brake. The projection 38a is loosely fitted, and the two grooves 39 formed on the inner peripheral surface of the outer portion of the rear axle case 21 are loosely fitted with the projection 40a projecting on the outer circumference of the friction plate 40. Two disc springs 41, which are interposed between the friction plates 38, and received by a ring-shaped plate 42, are provided on the outside in a stretched state. The side brake B could be integrated. Further, a bearing 44 is attached to the pin at the tip of the shift arm 43a fixed to the lower end of the side clutch shifter shaft 43 rotatably supported on the outer upper side of the rear axle case 21, and this bearing 44 is A clutch arm 45 is attached to the plate 42 and is attached to the upper end of the plate 42. A gear 46 mounted on the outer end of the clutch shaft 30 drives a rear axle 47 via a plurality of reduction gears.

A lock clutch 50, which is a claw clutch spline-fitted to the inner end of the clutch shaft 30, is internally provided in the inner cavity 48 of the passive claw clutch 27 on the right side. Since the claw clutch 25 is biased by the compression spring 26 in the disengagement direction, only the claw of the passive claw clutch 27 is always engaged with the claw of the claw clutch 25 and the claw of the lock clutch 50. Absent. A lock shift shaft 51 is supported by the rear axle case 21 near the lock clutch 50, and a lower end of the lock shift shaft 51 is engaged with a step portion on the outer circumference of the pawl clutch 25. The shift arm 52 is attached and the lock clutch arm 53 is attached to the upper end.

Next, the operating device will be described. The clutch pedal 55 arranged on the left side of the front part of the operating part is integrally mounted on the shaft 56, and the arm 57 projecting from the shaft 56 has the spring 58a. It is connected to the lock clutch arm 53 by an interposed rod 58, and one of a pair of left and right brake pedals 59 and 60 arranged on the right side of the operating part is attached to the shaft 61 so as to rotate integrally with the shaft 61, and the other is rotated. The brake pedals 59, 60 are movably mounted, and the brake pedals 59, 60 are linked to the left and right brake arms 45 by rods 64, 64. The clutch pedal 55 is linked to the main clutch 12 by a rod 12a. is there.

When any one of the brake pedals 59 and 60 is depressed shallowly while working with the above-mentioned riding work machine, first, the shift arm 43a interlocking therewith is rotated to move through the plate 42. Since the clutch case 31 is pushed against the disc spring 35, the side clutch A on that side is disengaged, and the transmission to the rear wheel 3 is cut off. Therefore, it is possible to correct the traveling direction, and when the pedal is fully depressed, After the side clutch A on the side is disengaged, the side brake B is activated and the rear wheels 3 are stopped, so that the vehicle can travel with a small turning radius.

When the vehicle is stopped on the road, when the clutch pedal 55 is depressed and then the left and right brake pedals 59 and 60 are fully depressed, the main clutch 12 is disengaged and the traveling system and the working machine are stopped. The transmission of the transmission system is cut off. On the other hand, the side brakes B, B are activated after the left and right side clutches A, A are disengaged, and the brake arm 53 is rotated with the depression of the clutch pedal 55. Since the claw clutch 25 moves against the compression spring 26 and meshes with the lock clutch 50, the distribution shaft 23, the left and right clutch shafts 30 and 30, and the rear wheel transmission shaft 20 are integrated to form the transmission case. The final speed change shaft 15 in 4 does not rotate, the front wheel drive shafts 16, 16 linked to it become braked, and the road surface Even if it is slippery like the cleats, and even if a large load is applied to the front wheels on a downhill, it can be stopped without slipping without fail.

Further, the distribution shaft 23 and the clutch shafts 30, 30 are aligned with each other, and the side clutch A, the side brake B, and the lock clutch 50 interposed between them are also the shafts 23, 30, 30. Since it is arranged on the same axis as the above, the configuration is remarkably simplified, the rear axle case 21 can be made smaller and lighter, and the assembly is easy.

[0015]

[Effect of device]

 The present invention relates to a riding work machine in which the left and right rear wheel drive units are equipped with friction clutch type side clutches A and side brakes B, respectively, and a clutch shaft 30 is provided on each side of a distribution shaft 23 driven by a rear wheel input shaft 22. , 30 are connected in series with the same axis, and a distribution shaft, a lock clutch 50 that locks at least one clutch shaft 30 with respect to the distribution shaft 23, left and right side clutches A, and left and right side brakes B. Since and are arranged on the same axis, if the clutch pedal 55 and the brake pedals 59, 60 are depressed when the aircraft is stopped on a downhill road, the transmission is cut off and the side clutches A, A are released. The side brakes B and B are activated after they are disengaged, and the lock clutch 50 integrates the clutch shaft 30 and the split shaft 23 so that the front wheels are also braked. Is safe become. Further, since the side clutch A, the side brake B and the lock clutch 50 are on the same axis, the structure is remarkably simplified, the size and weight are reduced, the cost can be reduced and the stability of the riding work machine is improved. can do.

[Submission date] January 28, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

The bevel gear 24 b attached to the intermediate distribution shaft 23 in the rear axle case 21 is meshed with the bevel gear 24 a attached to the rear end of the rear wheel input shaft 22 described above, and the distribution shaft 23 Of the claw clutches 25 and 25a engaged with both ends of the wheel so that only the right claw clutch 25 slides in the axial direction, the compression spring 26 presses and urges the rear wheel input shaft 22 side. The pawl is thick in the radial direction and is pressed and biased toward the rear wheel input shaft 22 side in the axial direction, and the pawl is thick in the radial direction and elongated in the axial direction. On the outside of the claw clutches 25, 25a, passive claw clutches 27, 27a that are constantly meshed with them are attached, and at the boss portion, a friction plate 28, which is a constituent element of the side clutch A composed of a friction clutch. the Yes spline-fitted as shown in FIG. 5 if e example to rotate integrally, fitting boss 31a is spline as shown in FIG. 6 to the clutch shaft 30 in which the passive claw clutch 27,2 7a is fitted clutch case 31 that has combined and has two rows of notched grooves 32, these switching Ketsumizo 32, friction plates 33 ... fitted the protrusion 32a of the outer circumference slidably the inner end The object is interposed between the friction plates 28, ... While being received by the ring 34, and is pressed by the two disc springs 35 through the spacer 36 that abuts on the trunk portion 30a of the clutch shaft 30. Bias It has been.

[Brief description of drawings]

FIG. 1 is a plan view of a steering operation device for a riding rice transplanter.

FIG. 2 is a developed sectional view of a rear wheel drive unit.

FIG. 3 is a cross-sectional view of a main part.

FIG. 4 is a plan view in which a side clutch and a side brake operating portion of a rear wheel are partially cut away.

5 is a cross-sectional view taken along the line AA of FIG.

6 is a sectional view taken along line BB of FIG.

FIG. 7 is a side view of the riding rice transplanter.

FIG. 8 is a transmission system diagram.

FIG. 9 is a cross-sectional view of a prototype of a rear wheel drive unit.

[Explanation of symbols]

 2 front wheel 3 rear wheel 12 main clutch 15 final speed change shaft 16 front wheel drive shaft 20 rear wheel drive shaft 25, 25a claw clutch 27.27a passive claw clutch 30 clutch shaft 36 spacer 33, 38, 40 friction plate 41 disc spring 50 lock clutch A side clutch B side brake

Claims (1)

[Scope of utility model registration request] 1. In a passenger working machine having friction clutch type side clutches A and side brakes B mounted on the left and right rear wheel drive parts, respectively, clutch shafts are provided on both sides of a distribution shaft 23 driven by a rear wheel input shaft 22. The distribution shafts, the lock clutches that lock at least one of the clutch shafts 30 with respect to the distribution shaft 23, the left and right side clutches A, and the left and right side brakes B. A brake device for a riding work machine, in which the brakes are arranged on the same axis.