JP2010263912A - Device for coupling implement to tractor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily mount at one-touch a rotary tillage device on the rear of a tractor in a 2P link. <P>SOLUTION: A device for coupling an implement to the tractor includes: the universal joint rod 42 formed of a spline yoke 43 provided with a journal kit 43a at one lateral end at the front part connected to a clutch yoke 44 provided with a journal kit 44a at one lateral end at the rear part with a double yoke 45 so as to be freely flexible; spline holes 43b and 44b in the center of the spline yoke 43 and the clutch yoke 44; the shaft end on the other side of the clutch yoke 44 axially supported with a bearing 47 internally inserted in an anti-slip state in a supporting metal 46 supported at the lower part of the hitch 37 with right and left supporting shafts 46d and 46d; an output shaft 12b at the rear of a traveling machine body 5 inserted into the side of the spline yoke 43; and an input shaft 15b on the side of the rotary tillage device 32 inserted into the side of the clutch yoke 44. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a work machine connecting device for a tractor.

  As a conventional tractor work machine connection device, a work machine hitch is configured to be movable up and down by a three-point connection type lifting device having an upper link and a lower link as components, and this work machine hitch is a work machine such as a rotary tiller. A device for quickly connecting work machines in such a manner as to suspend them is known (Patent Document 1). However, a so-called two-point link (2P link) does not have such a device.

JP-A-2-128610

  In the 2P link, the rotary tiller can be attached to the rear of the tractor with one touch, and the universal joint rod 42 is configured as a dedicated part so that the rotary tiller 32 can be attached to the rear of the tractor 1 with one touch. To do.

  To this end, the invention described in claim 1 is such that the left and right lowering plates 41a and 41b are extended to the front side in a fixed state on both lower sides of the hitch 37 having the upper hook 38 and the lower hooks 39 and 39, Near the center of the lower portion of the hitch 37, a universal joint rod 42 is provided along the front-rear direction, and the front end portions of the left and right lower holding plates 41a and 41b on the hitch 37 side are attached to the mounting plate 36 on the traveling vehicle body 5 side. The lift arm 49a is connected to the support shafts 36a, 36a provided so as to be rotatable up and down, and is provided at the rear part of the vehicle body of the traveling chassis 5 so as to be rotatable up and down. The upper part is pin-connected, the rotary tiller working machine 32 is attached to the upper hook 38 and the lower hooks 39, 39 of the hitch 37, and the hitch 3 is connected from the output shaft 12 b on the traveling vehicle body 5 side through the universal joint rod 42. In the tractor work machine coupling device for transmitting power to the input shaft 15b of the rotary tiller work machine 32 coupled to the universal joint rod 42, the universal joint rod 42 has a spline yoke provided with a journal kit 43a at one end on the front side. 43 and a clutch yoke 44 provided with a journal kit 44a at one end on the rear side thereof are connected by a double yoke 45 so that they can be bent. A spline is formed at the center of the spline yoke 43 and the clutch yoke 44. Holes 43b and 44b are provided, and the shaft end portion on the other side of the clutch yoke 44 is provided by a bearing 47 which is housed in a support metal 46 supported by left and right support shafts 46d and 46d at the lower part of the hitch 37 in a retaining state. The output shaft 12b at the rear of the traveling vehicle body 5 is inserted on the spline yoke 43 side, and the clutch yaw is 44 side is obtained by the working machine coupled device structure as the tractor inserting the input shaft 15b of the rotary cultivator 32 side.

  The invention according to claim 2 includes an upper support plate 34 and a lower support plate 35 on the upper and front sides of the input gear case 15 of the rotary tiller 32, respectively. Insertion holes 34a, a plurality of insertion holes 35a are provided on the lower support plate 35 on the front side of the input gear case 15, and the rotary tiller 32 is initially mounted on the upper and lower sides depending on the insertion positions of the support pins 34b and 35b. The tractor work machine coupling device according to claim 1, wherein the position can be changed.

  According to the first aspect of the present invention, the rotary tiller 32 can be attached to the rear portion of the tractor 1 with one touch by using the universal joint rod 42 as a dedicated part for 2P link configuration.

  In addition to the effect described in claim 1, the rotary plowing device 32 has an insertion position of the support pin 34 b to be inserted into each insertion hole 34 a of the upper support plate 34 and the lower support plate 35. The initial vertical mounting position of the rotary tiller 32 can be changed by the insertion position of the support pin 35b to be inserted into each insertion hole 35a. Therefore, the initial vertical mounting position of the rotary tiller 32 can be easily and easily changed according to the field conditions and the initially set tilling depth, and can be changed in a short time.

Enlarged side sectional view of the adjustment support rod Enlarged side view of the work machine attachment Enlarged plan view with partial cross section of work implement Overall side view of tractor It is a figure which shows the Example of this invention, and is an enlarged side view of the attachment part of a working machine, and a rotary tillage apparatus part. The figure which shows the Example of this invention, and the expanded side view which carried out the cross section of the universal joint collar part partially It is a figure which shows the Example of this invention, and is an expanded side view of a support apparatus part. It is a figure which shows the Example of this invention, and is an enlarged front view of a support apparatus part.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the rear part of the tractor 1, a rotary tiller 2 that is a working machine 2 that performs a tilling work, a cutting work, and the like via a support device 3 is provided. This support device 3 has a configuration in which an adjustment support rod 4 for manually adjusting the vertical position of the rotary tiller 2 is provided in the support device 3. The support device 3 and the adjustment support rod 4 are illustrated and described mainly as shown in FIGS.

  As shown in FIG. 4, the tractor 1 is provided with a pair of front wheels 6 pivotally supported on the left and right sides of the lower front part of the traveling vehicle body 5 of the tractor 1 and a pair of front wheels 6 on the left and right sides of the lower rear part. In this configuration, the rear wheel 7 is pivotally supported. A handle 8 is provided on the upper front portion of the traveling vehicle body 5, and a control seat 9 on which a worker to be operated is boarded is provided on the rear side of the upper handle 8, and the front wheel 6 is operated by operating the handle 8. Is done. The front and rear wheels 6 and 7 are both driven and steered.

  As shown in FIG. 4, the engine 11 is provided inside the engine room covered with the bonnet cover 10 at the upper part of the traveling chassis 5 and in front of the handle 8. In addition, an output gear case 12 is provided at the rear part of the traveling chassis 5, and the rotary tiller 2 that is the work machine 2 is rotationally driven by the output from the transmission mechanism 12 a built in the output gear case 12. .

As shown in FIGS. 1 to 4, a support device 3 is mounted on the rear portion of the tractor 1, and a rotary tiller device 2 is mounted on the rear side of the support device 3. 2 to 4, the rotary tiller 2 is provided with a support case 13 on the right side, a gear case 14 with a transmission mechanism 14a on the left side, and an input gear case with an input transmission mechanism 15a on the center. 15, the support case 13, the gear case 14, and the input gear case 15 are connected by drive pipes 16, 16 on the left and right sides. The drive pipe 16 on the left side includes a transmission mechanism 16a.

  As shown in FIG. 3, a tiller pipe 17 is rotatably supported at the lower end portion between the support case 13 and the gear case 14 of the rotary tiller 2. The tiller pipe 17 has a configuration in which a plurality of box-shaped claw holders 18 having a helical shape or a straight shape are attached to the outer peripheral portion of the tilling pipe 17 at predetermined intervals. The claw holder 18 has a construction in which a tilling claw 18a is mounted with bolts, nuts and the like. A rotary cover 19 including a ceiling plate cover 19a and left and right side plate covers 19b and 19c is provided on the rotation outer peripheral portion and the left and right side portions of the tillage claw 18a.

  The support device 3 has a special 3P top ring configuration in which a support plate 25a protrudes from the traveling vehicle body 5 side as shown in FIGS. 1, 2, and 4, and the length of the adjustment support rod 4 is shortened. Between the lower mounting plates 20 a provided on the left and right sides of the rear end portion of the traveling vehicle body 5 and the U-shaped rear mounting plates 20 b provided on the input gear case 15, both ends of the pair of lower support rods 21 are provided. It is the structure which provided the support pin 21a and was connected rotatably. A universal joint rod 22 that is an upper support rod that connects the output shaft 12b of the transmission mechanism 12a of the output gear case 12 and the input shaft 15b of the input transmission mechanism 15a of the input gear case 15 is provided so as to be foldable. It is. A base portion of a lift arm 23 is pivotally supported by a support pin 23 a on the upper vehicle body 5 a above the traveling vehicle body 5. The front end portion of the lift arm 23 and the lower support rod 21 are approximately in the front-rear direction. Between these parts, a support pin 23c is provided at both ends of the connecting rod 23b so as to be pivotally connected.

  The adjustment support rod 4 for adjusting the vertical position of the rotary tiller 2 is a part of the components of the support device 3 as shown in FIG. A support plate 25a is provided on the upper mounting plate 20c provided above the rear end of the traveling chassis 5. A rear upper mounting plate 25b is provided at the upper end of the input gear case 15, and one end of the support plate 24 is pivotally supported by a support pin 24a on the rear upper mounting plate 25b. The adjustment support rod 4 is pivotally supported by each support pin 4a between the other end of the support plate 24 and the tip of the support plate 25a. is there. Further, a receiving pin 24c is pivotally supported between the support pin 24b provided at a substantially intermediate portion in the front-rear direction of the support plate 24 and the support pin 21a of the rear mounting plate 20b so as to be rotatable. .

  As shown in FIG. 1, the adjustment support rod 4 has a link ball 26b rotatably inserted into a case 26a of one support case rod 26, and a support shaft 27 is fixed to the case 26a. The distal end portion of the support shaft 27 forms a large-diameter portion 27a and is provided with a spiral screw 27b portion, and a lock nut 27c is screwed into the spiral screw 27b portion. The large-diameter portion 27a is inserted with the inner diameter portion of the female spiral screw 28a of the female support rod 28 provided with the female spiral screw 28a on the inner diameter portion, and the female support rod 28 is independently rotatable. In addition, the female support rod 28 is provided with a small-diameter portion 28b at one end thereof to prevent it from coming off. The support shaft 27 may be formed integrally with the case 26a, and the large diameter portion 27a may be press-fitted into the inner diameter portion of the female spiral screw 28a of the female support rod 28. Alternatively, the support shaft 27 and the case 26a are manufactured separately, and after inserting the large diameter portion 27a of the support shaft 27 into the female support rod 28, the shaft end portion of the support shaft 27 and the support case 26 May be fixed by welding or the like. Alternatively, two semicircular female support rods 28 and 28 are manufactured, and after inserting the large-diameter portion 27a of the support shaft 27 into the semicircular female support rods 28 and 28, the semicircular female support rods 28 and 28 are inserted. The support rods 28 and 28 may be joined and the outer peripheral portion may be fixed by welding or the like. By either of these, the support case rod 26 and the female support rod 28 are formed integrally.

As shown in FIG. 1, the adjustment support rod 4 has a structure in which a support case rod 26 and a male support rod 29 provided with a male spiral screw 29a on the outer peripheral portion are integrally formed. A link ball 26b is rotatably inserted into the case 26a of the support case 26. The male spiral screw 29 portion of the male support rod 29 into which the lock nut 27c is screwed is integrally inserted to a predetermined position of the female spiral screw 28a portion of the female support rod 28, and this female support rod is formed. The lock nuts 27c and 27c provided at both portions of the 28 have the female support rod 28 and the male support rod 29 to form the adjustment support rod 4 having a short overall length. Thus, the vertical height position of the rotary tiller 2 can be set to the initial predetermined height position and can be adjusted. Further, the overall length (L) of the adjustment support rod 4 can be shortened, and the vertical height position of the rotary tiller 2 can be adjusted.

  When changing the vertical height position of the rotary tiller 2, the lock nuts 27c and 27c are loosened, and the female support rod 28 that can be independently rotated is rotated, and this female support rod is rotated. 28 and the male support rod 29, the total length of the rotary tiller 2 is fixed by the lock nuts 27c and 27c. Is a configuration capable of adjusting the initial predetermined height position.

  Accordingly, the female support rod 28 for adjusting the vertical height position of the rotary tiller 2 and the male support rod 29 constitute the adjustment support rod 4, and the female support rods 28 are provided at both ends of the female support rod 28. With the provided lock nuts 27c, the female support rod 28 can be fixed and rotated independently, and the total length of the adjustment support rod 4 can be changed, whereby the height of the rotary tiller 2 is increased. Since the position can be adjusted, the rotary tiller 2 can be adjusted up and down while being attached to the tractor 1, and the adjustment effort and time can be greatly reduced. By shortening the overall length of the rotary plowing device, the rotary tiller 2 can be quickly and greatly raised when turning in the field.

  During the operation of the rotary tiller 2 during the vertical adjustment operation of the tillage depth and during the raising / lowering operation during turning, the lift is operated by the hydraulic cylinder 30a etc. in conjunction with the operation by operating the operation lever 30. The rotary tiller 2 is vertically adjusted through the arm 23, the connecting rod 23b, and the lower support rod 21 with the support pin 21a at the front portion of the support rod 21 as the center of rotation.

  The support device 31 has a 2P link structure as shown in FIGS. 5 to 8, and the rotary tiller 32 for the support device 31 is provided with a receiving plate 33 on the upper side of the input gear case 15 as shown in FIG. The upper support plate 34 is mounted on the receiving plate 33, and upper, middle, and lower insertion holes 34a are provided in the upper portion of the upper support plate 34, and any one of the insertion holes 34a is provided. In this configuration, the support pin 34b is inserted and detachably attached with a nut or the like. Further, a lower support plate 35 having a U-shaped cross section is provided on the front side of the input gear case 15, and upper, middle and lower insertion holes 35a are provided on the left and right sides of the lower support plate 35. A support pin 35b is inserted into one of the insertion holes 35a on both sides, and left and right side ends of the support pin 35b are detachably mounted with nuts or the like.

  The support device 31 has a 2P link configuration as shown in FIGS. 5 to 8, and mounting plates 36 are provided on both left and right sides of the rear end portion of the traveling vehicle body 5, and the outer surface of the rear end portion of the mounting plate 36. In this configuration, a support shaft 36a protruding outward is fixedly provided. As shown in FIGS. 5, 7, and 8, the hitch 37 of the support device 31 is formed with left and right support rods 37a and 37b in a substantially A shape in plan view, and the left and right support rods 37a and 37a are formed. An upper hook 38 having an upper receiving groove 38a is fixed between the upper end portions, and is attached to the rear end portions of the left and right lower support plates 41a and 41b provided on the outer surfaces of the left and right support rods 37a and 37b. Is a configuration in which a lower hook 39 having a lower receiving groove 39a is fixedly provided.

As shown in FIGS. 5 and 7, the lower hooks 39 on both the left and right sides are provided with a fixing handle 40 so as to be rotatable. The fixing handle 40 has a structure in which a rotating lever 40b is fixed to the rotating plate 40a and the rotating plate 40a is rotatably mounted by a support pin 40c.

  The left and right support rods 37a and 37b of the hitch 37 are fixedly provided on the outer surface of the left and right support rods 37a and 37b, as shown in FIGS. The U-grooves 41c of the left and right support rods 41a and 41b are inserted into the support shaft 36a of the mounting plate 36, and are mounted with bolts 41d and nuts 41e.

  Between the output shaft 12b of the transmission mechanism 12a built in the output gear 12 and the input shaft 15b of the input transmission mechanism 15b built in the input gear 15 of the rotary tiller 32, as shown in FIGS. A universal joint rod 42 is provided and connected.

  As shown in FIG. 6, the universal joint rod 42 has a spline yoke 43 provided with a journal kit 43a at one end portion at the front portion and a clutch provided with a journal kit 44a at one end portion at the rear portion. The yoke 44 is connected by a double yoke 45 and can be bent. Spline holes 43b and 44b are provided at the center of the spline yoke 43 and the clutch yoke 44, and the spline holes 43b, The spline output shaft 12b and the input shaft 15b are inserted into 44b, and the lock pin 43c is inserted into the output shaft 15b.

  As shown in FIG. 6, a support metal 46 is provided at the other shaft end of the clutch yoke 44, and is supported by a bearing 47 built in the support metal 46. The support metal 46 has a structure in which the inner ring 46a and the outer ring 46b are contacted by a plurality of ribs 46c, and support shafts 46d and 46d are provided on the outer peripheral surface of the outer ring 46b. It is the structure which gave the stop.

  As shown in FIG. 8, the support shafts 46d and 46d of the support metal 46 are provided with a connecting rod 48 fixed to the lower portion between the left and right support rods 37a and 37b of the hitch 37, and projecting downward on the connecting rod 38. In this configuration, the support rods 48a and 48a are provided. The power of the input shaft 12b is input to the input shaft 15b via the universal joint rod 42, and the rotary tiller 32 is rotationally driven.

  As shown in FIGS. 5 and 7, a pivot shaft 49 is pivotally supported on the upper vehicle body 5a above the traveling vehicle body 5, and a lift arm 49a is fixedly provided on the pivot shaft 49. It is a configuration. The left and right support rods 37a and 37b of the hitch 37 are fixedly provided with left and right support plates 50a and 50b as shown in FIGS. 5, 7, and 8, and the left and right support rods 50a and 50b are In addition to a configuration bent toward the center, a lift arm 49a is inserted into the tip between the left and right support rods 50a and 50b and connected by a connection pin 49b.

  The rotary tiller 32 is mounted on the hitch 37 at the rear of the traveling vehicle body 5 of the tractor 1 by using a support pin 34b mounted on a predetermined position of the upper support plate 34 of the rotary tiller 32 on the upper hook 38 of the hitch 37. After inserting into the groove 38a, the rotation lever 40b of the fixed handle 40 is rotated, and the overlapping state of the rotation plate 40a and the lower receiving groove 39a of the lower hook 39 of the hitch 37 is opened, The support pin 35b attached to the predetermined position of the lower support plate 35 of the rotary tiller 32 is inserted into the lower receiving groove 39b of the lower hook 39, and then the rotation lever 40b of the fixed handle 40 is rotated to the original state. Then, when the support pin 35b is pressed by the rotating plate 40a, the mounting of the rotary tiller 32 is completed.

Thereby, the universal joint rod 42 is invented as a dedicated part for 2P link configuration, so that the rotary tiller 32 can be mounted on the rear portion of the tractor 1 with one touch. Thereby, attachment and detachment are easy and simple, and these operations can be performed in a short time.

  When changing the plowing depth during the plowing operation with the rotary plowing device 32, the operating lever 30 provided on the tractor 1 is operated, and in conjunction with this operation, the hydraulic cylinder 30 a or the like rotates the rotating shaft 49. Is rotated, and the rotary tiller 32 is vertically adjusted via the rotation shaft 49, the lift arm 49a, and the left / right rotation plates 50a and 50b.

  As shown in FIG. 5, the rotary tiller 32 has an insertion position of the support pin 34b inserted into each insertion hole 34a of the upper support plate 34 and an insertion position of the support pin 35b inserted into each insertion hole 35a of the lower support plate 35. Thus, the initial vertical mounting position of the rotary tiller 32 can be changed.

  Thus, the initial vertical mounting position of the rotary tiller 32 can be easily and easily changed according to the field conditions and the tilling depth set initially, and can be changed in a short time.

32 Rotary tiller 34 Upper support plate 34b Support pin 35 Lower support plate 35b Support pin 36 Mounting plate 37 Hitch 38 Upper hook 39 Lower hook 41a Left lower plate 41b Right lower plate 42 Universal joint rod 43 Spline yoke 43a Journal kit 43b Spline Hole 44 Clutch yoke 44a Journal kit 44b Spline hole 45 Double yoke 46 Support metal 46d Support shaft 47 Bearing 49a Lift arm 50a Left support plate 50b Right support plate

Claims (2)

  The left and right lower holding plates (41a, 41b) are fixedly extended to the front side of the lower side of the hitch (37) having the upper hook (38) and the lower hook (39, 39), and the hitch (37) A universal joint rod (42) is provided along the front-rear direction near the center of the lower part of the vehicle, and the front ends of the left and right lower support plates (41a, 41b) on the hitch (37) side are on the vehicle body (5) side. Is connected to a support shaft (36a, 36a) provided on the mounting plate (36) of the vehicle so that it can be turned up and down, and a lift arm (49a) provided at the rear of the body of the traveling chassis (5) so as to be turned up and down. Is connected to the upper part of the hitch (37) via the left and right support plates (50a, 50b), and the rotary tiller (32) is attached to the upper hook (38) and the lower hook (39, 39) of the hitch (37). Mounting, from the output shaft (12b) on the traveling vehicle body (5) side In the tractor work machine connection device for transmitting power to the input shaft (15b) of the rotary tiller work machine (32) connected to the hitch (37) via the universal joint work (42), the universal joint work (42 ) Is a spline yoke (43) provided with a journal kit (43a) at one end on the front side, and a clutch yoke (44) provided with a journal kit (44a) on one side end on the rear. Are connected to each other by a double yoke (45) so that they can be bent freely. Spline holes (43b, 44b) are provided in the center of the spline yoke (43) and the clutch yoke (44), and the clutch yoke (44) The other end of the shaft is secured to the support metal (46) supported by the left and right support shafts (46d, 46d) below the hitch (37). The output shaft (12b) at the rear of the traveling vehicle body (5) is inserted into the spline yoke (43) side, and the rotary tiller (32) side is connected to the clutch yoke (44) side. A tractor work machine coupling device configured to insert an input shaft (15b).   An upper support plate (34) and a lower support plate (35) are provided on the upper and front sides of the input gear case (15) of the rotary tiller (32), respectively. A plurality of insertion holes (34a) are provided, and a plurality of insertion holes (35a) are provided vertically on the lower support plate (35) on the front side of the input gear case (15), and support pins (34b, 35b) to be inserted into these are inserted. The tractor work machine coupling device according to claim 1, wherein the initial vertical mounting position of the rotary tiller (32) is changeable depending on the position.

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