JPS63291506A - Device for mounting working machine on tractor - Google Patents

Abstract

PURPOSE:To eliminate necessity of precise centering, by using an uniform velocity joint in a bent transmission part for transmitting rotation power from the side of a tractor to the side of a working machine, providing a wide angle guide in an outer case and enabling engaging and disengaging of an inner race. CONSTITUTION:A power transmission mechanism 12 is constituted of a bent transmission part 13 on the side of a tractor, slide shaft transmission shaft 14 and bent transmission part 15 on the side of a working machine and at least one of the bent transmission part is an uniform velocity ball joint. A wide angle guide (15c) is provided in the inlet part of an outer race (15a) of the uniform velocity ball joint 15 so as to enable power transmission simply by moving the inner race (15b) when mounting a working machine on a tractor.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a tractor in which, for example, an agricultural working machine is connected to an agricultural tractor via a three-point link hitch mechanism having an automatic connection b1 function so that it can be raised and lowered, and rotation and power are transmitted from the agricultural tractor to the agricultural working machine. This relates to a work Ia mounting device.

[Conventional technology]

Conventionally, a work machine is connected to the rear of a tractor through a three-point link hitch mechanism with automatic connection line so that it can be raised and lowered, and a bending transmission part that can be bent from the tractor to the work machine on the tractor side and the work machine side is connected. For example, a power transmission mechanism for transmitting rotational power is provided, and this power transmission mechanism is automatically brought into a power transmission state or a power transmission release state when a working machine is connected or disconnected. Tokukai Showa 6
．． It is known from Publication No. 2-65602@. The power transmission mechanism of this prior art has a configuration in which a pawl clutch is provided on one bending transmission portion for engagement and disengagement. [Problems to be Solved by the Invention] The power transmission mechanism of the above-mentioned prior art automatically engages and disengages the pawl clutch, and centering is especially important when engaging, and the power transmission mechanism is approximately ±3II1m. Only a tolerance of . For this reason, high-precision M4 construction is required for the machine coupling device and power transmission mechanism. In addition, since the tractor and work equipment must be connected to each other with high precision,
It was necessary to select a product suitable for each tractor and work machine in advance, and there was no versatility.

[Means to solve the problem]

The present invention has been conceived in view of the above circumstances, and the power transmission mechanism includes a constant velocity joint disposed in the bending transmission portion of either one of the tractor side or the working machine side, or both. , or one characterized in that one of both constant velocity joints is provided with an inner race that can be inserted into and removed from an outer race that has a wide-angle guide fixed to the working machine side or the tractor side via a slide transmission shaft. It is.

[For production]

By adopting the above configuration, the work-specific attachment device of the present invention does not require particular centering accuracy when engaging the power transmission mechanism, and therefore, the versatility of the tractor and work equipment is enhanced. Furthermore, uniform rotational power transmission is achieved. [Example 1] Hereinafter, an example of the present invention will be described with reference to the drawings. In Fig. 1, numeral 1 is an agricultural tractor, 2 is a rotary agricultural machine, and the rear of the agricultural tractor 1 has a three-point sink B.
! II A top link 4 and a lower link 5 of the structure 3 are provided. An automatic hitch hanger 6 is connected to the top link 4 and the lower link 5, so that the automatic hitch hanger 6 can be automatically connected to the top mast 7 and lower link connecting part 8 of the low-rise agricultural machine 2. A PTO shaft 9 protrudes from the rear of the agricultural tractor 1.
Further, an input shaft 11 projects forward from the mission case 10 of the rotary agricultural machine 2. The PTO shaft 9 and the input shaft 11 are connected by a power transmission mechanism 12 to transmit rotational power, and this power transmission mechanism 12 is connected to a bending transmission part 13 on the tractor side, It consists of a slide (ζ transmission shaft 14) and a bending transmission part 15 on the working machine side.The bending transmission part 13 on the tractor side consists of a single joint, and the bending transmission part 15 on the operating Rva side has a constant velocity. As shown in FIGS. 2 to 4, the constant velocity ball joint 15 has its outer race 15a fixed to the input shaft 11 of the low-crop farming n2, and has a wide-angle joint at its entrance. Guide 1
5c is provided. This wide-angle guide 15c is for guiding the inner race 15b into the outer race 15a, and as is clear from FIGS. 3 and 4, its cross-sectional shape is almost similar. On the other hand, the inner race 15b of the constant velocity ball joint 15
is attached to the tip of the m drive shaft 14a of the slide transmission shaft 14. The sliding shaft 14a has a bearing 1 in its middle part.
6, the outer race 16 of this bearing 1G
The upper part of a is suspended from a bracket 6b provided on the auto hit hanger 6 via a spring 17. Further, one end of an operating lever 18 is fixed to the side of the outer race 16a of the bearing 16, and the other end extends toward the agricultural tractor 1 so that it can be operated from the tractor side by grasping the grip. In addition, the operating lever 18 has a locking rod 1.
9 is fixed, and this locking rod 19 can selectively engage with a plurality of guide grooves 20 fixed to the auto hit hanger 6. In the tractor-specific attachment device configured as described above, when connecting the low-rise agricultural implement 2 to the agricultural tractor 1, the lower link 5 of the three-point link mechanism 3 is operated to connect the hook portion 6a of the auto hit hanger 6. When the rotary agricultural working machine 2 is engaged with the top mast 7 of the rotary agricultural working machine 2 and the rotary working machine is lifted, the lower part of the rotary agricultural working machine 2 moves slightly forward, and the lower link bin 6c of the automatic hitch hanger 6 and the rotary agricultural working machine 2. Roulink consolidated portion 8 in 2 is associated, and Rokeli farm worker 2 is automatically connected to agricultural I and Lacta 1. When the rotary agricultural machine 2 is connected to the agricultural tractor 1, the outer race 15a and wide-angle guide 15c of the constant velocity ball joint 15 fixed to the input shaft 11 of the rotary agricultural machine 20 of the power transmission mechanism 12, and the slide @14
Constant velocity ball joint 1 attached to the sliding shaft 14a of
The inner race 15b of No. 5 is close to the inner race 15b (J is in the opposite position, and the work name is to hold the operating lever 18 while riding on the agricultural tractor 1 facing backwards and move the inner race 15b through the wide-angle guide 15C. outer lace 15a
and engage the locking rod 19 with the guide groove 20. In this engagement operation, since the inner race 15b is suspended by the spring 17 at a position substantially opposite to the wide-angle guide 15c, the sliding shaft 14a is extended by the operating lever 18, and the ball position n is regulated by the wide-angle guide 15C. However, it can be easily introduced into the outer race 15a. When the PTO shaft 9 is rotated, the rotational power is transmitted to the input shaft 11 via the single joint 13, the slide transmission shaft 14, and the constant velocity ball joint 15, and drives the working part of the low-moly agricultural machine 2. . During this power transmission, since the constant velocity ball joint 15 is used in the present invention, the power is transmitted from the agricultural tractor 1 to the rotary agricultural machine 2 at a constant velocity, and the rotary agricultural machine 2 is operated normally. In addition, even when the rotary agricultural machine 2 is raised and lowered by the three-point linkage mechanism 3 and the bending angles of both the bending parts 13 and 15 become large, since a constant velocity ball joint is used in one of the bending parts, Smooth power transmission is achieved without any abnormal noise occurring at the joint. To release the connection between the agricultural tractor 1 and the rotary agricultural machine 2, stop the drive of the rotary agricultural machine 2 and the running of the agricultural tractor 1, hold the operating lever 18 with the rotary agricultural machine 12 on the ground, and press the engagement rod 19. Engage with 'fI20
When the inner race 15b and the sliding shaft 14a are moved toward the agricultural tractor 1 after releasing the engagement with the
The power is cut off when the bales are moved from the 5a1 wide-angle guide 15c. Thereafter, the connection between the lower link bin 6C and the lower link connecting portion 8 is released, the engagement between the hook portion 6a and the top mast 7 is released, and the connection between the agricultural tractor 1 and the rotary agricultural machine 2 is released. Note that instead of the constant velocity ball joint 15, as shown in FIGS. 5 to 7, an inner race 21b, a needle bearing 21C10, and a needle bearing 21d are used, which are connected to the outer race through a wide-angle guide 21e. 21
It is also possible to use a constant velocity joint 21 which is designed to have a and n exits. Further, a two-point link mechanism may be used instead of the three-point link mechanism 3, and furthermore, the single joint 13 may be replaced with a two-point link mechanism.
Instead, a constant velocity ball joint or a constant velocity joint using needle bearings and rollers may be used, and the rotary agricultural machine 2 may be replaced with another agricultural machine. [Effects of the Invention] As explained above, according to the work equipment mounting device for a tractor of the present invention, it is possible to insert and remove the bending transmission part of the power transmission mechanism that transmits rotational power from the tractor side to the work equipment side. Using a quick joint, a wide angle guide is installed on the outer race,
Since the inner race is removable, when the work equipment is attached to the tractor, power transmission can be performed at a constant velocity simply by moving the inner race of the constant velocity joint. Moreover, precise centering is not required. It is versatile because it does not. In addition, the power transmission function of the power transmission mechanism can be easily released, making it easy to connect and disconnect the power transmission as well as attach and detach the work equipment.
And it can be done quickly.

[Brief explanation of drawings]

FIG. 1 is a work l! showing an embodiment of the present invention. FIG. 2 is a partially sectional side view of the constant velocity ball joint, FIGS. 3 and 4 are sectional views taken along lines A-AM and B-B in FIG. 2, Figure 5 shows needle bearings.
The side view of the constant velocity joint using rollers, FIGS. 6 and 7 are sectional views taken along lines CC and D-D in FIG. 5. 1... Agricultural tractor, 2... Rotary agricultural machine, 3
...3-point link mechanism, 4...Top link, 5...
・Lower link, 6... Auto hitch hanger, 7...
Top mast, 8...Lower link connection part, 9...P
TO axis, 10...Mission case, 11...Input shaft, 12...Power transmission mechanism, 13...Tractor side bending transmission part (single joint), 14...Slide transmission shaft, 14a. ...Sliding shaft, 15...Work machine side bending transmission part (constant velocity ball joint) 15a...Outer race, 15b...Inner race, 15c...Wide angle guide, 16...Bearing, 16a ...Outer race, 17...Spring, 18...Operation lever, 19...
・Latching rod, 20...Guide groove, 21...Needle bearing, constant velocity joint using roller, 21a...
・Outer lace, 21b...Inner lace, 21C・
...Needle bearing, 21d...Roller, 210
...Wide-angle guide. Patent Applicant Kobashi Kogyo Co., Ltd. Representative Patent Attorney Nobuo Kobashi Jundo Patent Attorney Susumu Murai Drawing Engraving Date of Drawing 2 Fig. 3 Fig. 4 Fig. 5 Fig. 7 Fig. 6 Procedural Amendment (Method) % formula % 2, Name of the invention Attaching work equipment to a tractor v1 Place 3, Relationship with the case of the person making the amendment Patent Applicant: 684-4 Nakaawashi, Okayama City, Okayama Prefecture, Agent 5, Date of amendment order: Figure 2 7 of the drawing to be corrected and ``Figure 2'' of the content drawing of the correction will be corrected as shown in the attached sheet.

Claims (1)

[Claims] The work equipment is connected to the tractor so that it can be raised and lowered via a link mechanism that has an automatic connection function, and rotational power is transmitted from the tractor to the work equipment by having a bendable transmission part that can be bent on the tractor side and the work equipment side. In the work equipment mounting device equipped with a power transmission mechanism that A tractor characterized in that one of both constant velocity joints is provided with an inner race that can be inserted into and removed from an outer race having a wide-angle guide fixed to the working machine side or the tractor side via a slide transmission shaft. Work equipment attachment device.