JPS5820802B2 - Kenin setzokutai - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a traction connection and, more particularly, to a traction connection between a tractor and a shepherd-axle trailer so as to transfer a portion of the trailer's load onto the tractor.

The present invention includes a first coupling element, a pair of lift arms on which the element is mounted on the towing vehicle so as to be rotatable by a rigid shaft provided on the towing vehicle, and a second coupling element mounted on the trailer. and a link that swings the first coupling element northward about a horizontal axis to engage the first coupling element with the second coupling element;
Relative movement other than relative rotation about the vertical axis is provided between the first coupling element and the second coupling element when engaged to enable coupling of the towing vehicle and the towed vehicle about the vertical axis during use. A traction connection body is provided, which includes a collar fitted onto a post for locking the first and second coupling elements so as not to damage the collar, and a recess provided in the collar and a pin or gate member engaged with the recess.

In the present invention, the first coupling element includes an upwardly extending column having a spherical bearing at its upper end, and the second coupling element includes a downwardly extending partial spherical bearing (having a recessed seat) for receiving the spherical bearing of the first coupling element.

The first coupling element further includes a collar rotatably mounted on the column below the spherical bearing and restricted from moving up and down axially with respect to the column, and the second coupling element is connected to the pin or gate member of the fixing device. Hold the coupling element in the collar.

The second coupling element has an upwardly extending channel member closed at an upper end with a seat for receiving the post of the first coupling element.

fixing the column collar with a removable pin or gate member passed through a hole in the opposite wall of the channel member;
A column supported within the channel member by a collar on the column is retained within the channel member.

In the above arrangement, the device for mounting the first coupling element on the tow vehicle has two horizontally spaced lift arms between which the first coupling element is mounted.

Preferably, a substantially X-shaped rigid body is provided between the lift arms,
Preferably, the first coupling element is mounted in the center of the X-shaped structure.

The column can, for example, be provided with a hub at its lower end, which is mounted on a pin supported on the structure.

It is also possible to provide a channel member on the front leg of the X-shaped body structure and to pivotally attach the lift arm to the end of the channel member.

The rear leg of the X-shaped structure may be connected to the hollow shaft, and the end of the lift arm may be attached to the element by a bolt passing through the arm and screwed into the end of the hollow shaft.

The end of the arm has a conventional ball ear through which the bolt passes.

The invention also provides a towing vehicle having a towing connection according to the above configuration, the lift arm for the first coupling element being pivoted to the towing vehicle for rotation about a horizontal axis extending laterally of the vehicle; Its axle is close to the rear axle.

The transverse axle may be spaced below and in front of the rear axle.

The device for rotating the lift arm for the first coupling element may be a fluid jack.

The invention also provides a towing vehicle according to any of the above configurations in combination with a trailer, in which case the trailer has a gooseneck-shaped drawbar and the second coupling element of the towing connection is It is mounted on the front end of a gooseneck-shaped drawbar.

The present invention will now be described in detail with reference to the accompanying drawings, in which a conventional agricultural tractor 10 is shown in FIG.

The tractor has a conventional pair of lift arms 11 at the rear and a rear axle case 12 for rotation about a horizontal axis 13.
Pivoted above, this shaft 13 extends parallel to and immediately below and forward of the rear axle 14.

Thus, any load placed on the tractor by said arm will force the front and rear of the tractor downwards and will not tend to lift the tractor upwards, whatever the load on the tractor.

As will be explained below, the lift arm 11 may be pivoted on the tractor slightly aft of the horizontal axis 13, in which case the trailer load will exert a slight lifting force on the tractor about the axis 13, but this will not affect the tractor. It can be ignored compared to its own weight.

The foot arm 11 extending rearward of the rear axle 14 is
The fluid jack can rotate in a vertical plane around the horizontal axis 13 (its raised position is the solid line position in FIG. 4, and its lowered position is the dot-dashed line position in FIG. 4), and the horizontal axis 1
It is possible to swing in a vertical plane passing through 3.

Therefore, the arms 11 are movable back and forth relative to each other.

The first coupling element 15 of the traction positive series is glued onto the arm and attached to the column 3.
0. It includes a base 31 and a collar 35, which will be described in detail later.

A tow connection is used to connect a trailer (not shown) to a tractor.

The trailer is of the axle type, with the axle at the rear of the trailer so that a portion of the trailer load is directed downwardly onto the towing connection.

At the front end of the trailer is a gooseneck-shaped pull bar 16.

The second coupling element 17 of the traction positive connection body is attached to the lower front end of the tension rod.

This second coupling element 17 includes a channel member 40 and a bearing seat 42, which will be described below.

The mounting of the first coupling element of the traction connection on the arm 11 will be explained with reference to FIG.

A rigid, generally X-shaped base structure is placed between the arms 11 and consists of two opposed V-shaped members 18, 19 with flat apexes.

These parts 18, 19 are rigidly joined near their apexes by two spaced apart parallel plates 20, the ends of which are welded to the parts 18, 19, and together with the apexes of these parts form a box.

The outer end of member 18 is welded to hollow shaft 21.

The rearmost end of the lift arm 11 is provided with a conventional universal ball ear 22.

The shaft 21 is inserted between the cannon ears, and there is a circular hole at the end of the arm 11, into which the bolt 23 is inserted so that the spherical cannon ear can be inserted.
The bolt is fixed to the shaft, and the shaft has a female thread to receive the bolt.

The member 18 is thus suspended between the arms, the arms being held in place but still able to move up and down.

The ends of members 19 are each secured to a channel member 24 which engages around arm 11 to support member 19 on the arm.

Ring 25 is welded to members 18 and 19 at their apex faces.

A hollow cylindrical hub 26 is mounted for rotation around an axis 27, which has an apex and a pin 28 passing through the ring 25.
It passes through the center of the car and extends to the front and back of the car.

The pin has a head at one end and a spring clip 29 engages the other end with a slot in the pin to hold the pin in place.

The bub 26 is the base 3 of the enlarged diameter of the first engagement element 15.
1. Hold upright column 30 with 1.

Two laterally extending pins 32 mounted on parallel side plates 20 engage indentations formed in the surface of the bub to prevent rotation of the post 30 about the pins 28 until a traction connection is established.

The pin is pressed against the bub by a leaf spring 33 welded to the side plate 20.

Since the elements of the traction connection are heavy, we first use the bub 26. V-shaped member 18. with post 30 and pin 28 removed from between the arms.
The approximately X-shaped base structure consisting of 19 is first attached to the arm 11.
Install on top.

Then, the bub 26 is inserted and the pillar 30 is held upright between the vertices of the base structure by means of the pin 32.

Referring to FIG. 3, which shows details of the column, the upper end of the column 30 is a partially spherical bearing 34 for engaging a second coupling element 17, which will be described later.

A collar 35 immediately above the base 31 surrounds the column,
Rotate around the pillar.

The collar is held in place by a circlip 36 within the column to prevent upward movement relative to the column.

Four partial recesses 37 are formed on the outer periphery of the collar at intervals in the circumferential direction.

As shown in FIG. 3, the second coupling element 17 of the traction connection comprises an upright channel member 40, which channel member faces towards the front of the drawbar.

Additionally, the channel member cross-section is open at the lower end and closed at the upper end by an end wall 41 whose lower surface forms a partially spherical recessed seat 42 for engagement with the spherical bearing 34 of the post 30.

A fixing pin 44 is positioned across the channel member 40 at its lower end adjacent to the rear wall.

The pin is sized at a height above the end wall 41 such that it can engage one of the partial recesses 37 in the collar 35 on the post 30.

A second pin 45 extends between the walls of the channel member 40 adjacent the open end of the channel member 40 and engages a second recess 37 on the opposite side of the collar, thus locking the post into the channel member 40 as described below. hold within.

The pin 45 is removable and has a head at one end and a releasable spring clip 46 at the other end to hold the pin in place.

The operation of the traction connection will now be described with reference to FIGS. 3 and 4.

In FIG. 3, the arm 11 of the tractor is able to rotate the first coupling element 15 of the connection body downwards by means of an operating mechanism comprising a link 50 connected to the arm (dotted line position in FIG. 4).

The front end of the trailer is supported during this time by a conventional cradle or jack.

The tractor is then reversed and the post 30 is placed into the channel member 40 on the trailer drawbar as shown in phantom in FIG.

A partially spherical bearing then enters just below the seat 42.

Next, the arm 11 is raised by the operating mechanism link 50 to engage the bearing 34 with the seat 42, and when the arm is further raised, the channel member is raised and the front end of the trailer is raised accordingly.

In this manner, the post 30 enters the channel member until the collar 35 on the post engages the locking pin 44 within the channel member.

Shake the collar until the pin 44 is in one recess 37 in the collar as shown in FIG.

A pin 45 is then inserted across the channel member and locked in place by a spring clip 46.

Of course, the collar may be locked within the channel member by other retention devices such as gate devices.

(See Figure 10) Coupling elements 15.17 of the connection body are locked in the vertical plane, but 1 around the axis of the column to allow articulation of the tractor and trailer in the horizontal plane for normal changes of direction. can be rotated with respect to each other.

To enable articulation of the tractor and trailer in the vertical plane, the operating mechanism link used to raise the arm 11 is released and the arm 11 is moved to the horizontal axis 13 on the tractor.
It is best to allow it to rotate freely around the .

To further twist the tractor and trailer about the fore-and-aft axis, the post 30 may be rotated about the mounting pin 28 on the base structure.

Pin 32 is configured such that when sufficient torque is applied to it, it is forced out of the recess in bub 26 and the bub can rotate on pin 28.

The traction connection can be released by reversing the connection process described above.

When the tractor does not need to be towed, the base structure can be removed from the lift arm and easily used for other purposes.

The structure of FIGS. 3 and 4 described above differs slightly from that of FIG.

That is, the horizontal axis 13 of the lift arm is slightly behind the rear axle 14, so that in this case the load of the trailer is not applied downwardly to the front wheels of the tractor, and since the axle 13 is slightly behind the axle 14, there is a very small lift. Force is applied from the trailer to the tractor, which is fully balanced by the weight of the tractor.

FIG. 4 also shows a section of a normal straight drawbar 51 for the trailer instead of the goose neck drawbar 16.

If a straight drawbar is used, the second coupling element 17 of the traction connection is firmly attached to the front end of the drawbar.

If the tractor does not have a conventional pair of lift arms 11, it may be provided with multiple arms or sheep arms similar to the lift arms described above.

The alternative traction connection shown in FIGS. 5-8 is very similar to that shown in FIGS. 1-4, and like parts are numbered the same.

The main difference is that the rigid X-shaped base structure placed between the arms 11 is made of single-section beams 55, welded together at the center of the X structure and the joint covered by a plate 55a.

A cross member 56 is provided in front of the center of the X structure.

An upright lug 57 is mounted centrally on a crosspiece member 56 having a central hole (not shown), and a similar lug 58 is mounted just forward of the X-shaped structure.

The lugs 57 and 58 are connected by side walls 59.

The hub at the lower end of the post 30 has a pin 28 extending through the lug.
It is mounted between the lugs 57, 58 at the top and held in place by spring clips.

A spring steel finger 60 is attached to the crosspiece member 56 to hold the post 30 in the upright position prior to engagement of the traction connection.

It extends upwardly between lugs 57 and 58.

The end of the finger is wound into a cylindrical shape and abuts a flat notch 61 in the underside of the hub 26 shown in FIG.

This arrangement is otherwise generally the same as described with reference to FIGS. 1-4.

Figures 9 and 10 show an alternative arrangement for locking the column 30 to the channel member 40, which is particularly suitable for heavy loads of traction connections.

Pin 45 is replaced by gate member 62 which is pivotally mounted between two spaced apart lugs 63 projecting from the sides of the lower end of channel member 40 on a pin 64 extending between the lugs.

In the closed position, the gate member 62 extends across the channel member 40 to engage the collar 35 on the post 30 and is between a second pair of lugs 65 projecting from the lower end of the other side of the channel member.

1-ink pin 66 is inserted through the hole in the lug and through the end of the gate member between the lugs to hold the gate member in the closed position.

To open the gate member, the pin 66 is lifted away from the gate member and the gate member is then swung laterally to release the post 30 from the channel member 40.

The gate member has an upright rigid arm 67 for use by the driver of the vehicle to open and close the gate, and the upper end of the pin 66 is bent to provide a horizontal leg to facilitate operation of the pin.

The embodiments of the present invention are as follows.

1. The traction connection of claim 1, wherein: (1) the second coupling element includes an upwardly extending channel member closed at an upper end by a seat for receiving a post of the first coupling element;

(2) The traction connection according to paragraph (1), wherein the locking device includes a removable pin that passes through the hole in the opposing wall of the channel member and abuts the annular member on the post to retain the post within the channel member. .

(3) The apparatus for attaching the first coupling element to the towing vehicle has two horizontally spaced lift arms, and the towing apparatus according to the claims or each of the preceding claims has two horizontally spaced lift arms, and the first coupling element is attached between the two horizontally spaced lift arms. Connector.

(4) A roughly X-shaped rigid structure is installed between the lift arms, and the first coupling element is installed in the center of the X-shaped structure.
) The traction connection body described in item ).

(5) The traction connection body according to claim 1, wherein the housing has a hub at the lower end and is mounted on a pin supported by the structure.

(6) The traction connection body according to claim 1 or paragraphs (4) and (5), wherein the front leg of the X-shaped structure has an end portion of a channel member that engages around the lift arm.

(7) The rear legs of the X-shaped structure are connected by a hollow shaft, and the end of the lift arm is attached to the element by a bolt passing through the arm and screwed into the end of the hollow shaft. ) , (5) , (6)
Traction connection body as described in section.

(8) The towing connection body according to item (7), wherein the end of the arm has an ordinary ball ear and a bolt passes through this.

(9) The attachment device for the first coupling element extends laterally to the tow vehicle and is pivoted to the tow vehicle so as to swing about an axis proximate to the rear axle of the tow vehicle. Towing vehicle as stated.

(10) The towing vehicle according to item (9), wherein the horizontal axis is located below the front of the rear axle.

(11) The towing vehicle according to item (9) or αO), wherein the device for rotating the mounting device for the first coupling element includes a fluid jack.

(12) The towing vehicle according to any one of paragraphs (9) to 11, which is combined with a trailer having a gooseneck-shaped drawbar, and wherein the second coupling element of the towing connection is attached to the front end of the drawbar.

[Brief explanation of the drawing]

1 is a side view of a tractor connected to a trailer by a traction connection according to the invention, FIG. 2 is a plan view of a portion of the traction connection attached to the tractor, and FIG. 3 is just before engagement. FIG. 4 is a side view of each part of the traction connection when it is fully engaged, FIG. 5 is a plan view of another example of the traction connection, and FIG. FIG. 7 is a side view of a portion of the connecting body of FIG. 6, FIG. 8 is a side view of another portion of the connecting body, and FIG. 9 is a modified connection. FIG. 10 is a front view of a portion of the body; FIG. 10 is a plan view of the connecting body of FIG. 9; 10...-Tractor, 11... Lift arm, 13-1. ... Horizontal axis, 14 ... Rear axle, 15 ... First coupling element, 16 ...
- Trailer tension rod, 17...second coupling element,
18.19... V-shaped member, 21... Uyaft, 22... Cannon ear, 25... Ring. 30...Column, 28...Pin, 44.4
5.--Fixing pin, 50...Link.

Claims (1)

Claims: 1. A first coupling element and mounting on the tractor for rotation of the coupling element about a lateral horizontal axis on the tractor. two horizontally spaced lift arms, a second coupling element mounted on the trailer, and said shaft for engaging and raising the first coupling element with the second coupling element; a link for rotating the first coupling element about the vertical axis and engaging a relative movement other than relative rotation about the vertical axis to enable articulation of the towing vehicle and the towed vehicle about the vertical axis during use; a pin or gate member for ranking the first and second coupling elements so as to prevent the first coupling element from interfering with the first coupling element; having a downwardly directed partially spherical recessed seat for receiving the spherical bearing of the element;
The first coupling element further rotates around the column below the spherical bearing. a collar rotatably mounted and immovable in the axial direction with respect to the post, the pin or gate member being engaged with a recess provided in the collar to connect the first and second coupling elements; A tow connection body characterized by locking.