CN212654421U

CN212654421U - Walking steering linkage control mechanism of crawler tractor

Info

Publication number: CN212654421U
Application number: CN202021599204.9U
Authority: CN
Inventors: 张后才; 储维
Original assignee: Jiangsu World Agricultural Machinery Co Ltd
Current assignee: Jiangsu World Agricultural Machinery Co Ltd
Priority date: 2020-08-05
Filing date: 2020-08-05
Publication date: 2021-03-05
Anticipated expiration: 2030-08-05

Abstract

The utility model relates to the technical field of tractor control mechanisms, in particular to a walking and steering linkage control mechanism of a crawler tractor, which comprises a rotating shaft arm, a steering gear, a steering cam and a sleeve, wherein two ends of the rotating shaft arm are respectively connected with a left steering arm and a right steering arm through a pull rod assembly and a rocker arm assembly; the steering mechanism is characterized in that the rotating shaft arm is arranged on a steering mechanism, the steering mechanism is arranged on a sliding rail in a sliding manner, and a chassis base of the steering mechanism is connected with the operating rod through a fifth pull rod; the steering cam is connected with the direction rotating arm and can drive the direction rotating arm to rotate; the sleeve is connected with the steering wheel, and a sliding shaft is arranged in the sleeve in a sliding mode. The utility model discloses can the march forward of direct control crawler tractor walking retreat and turn to, easy operation is convenient, and the accuse left side steering arm and the accuse right side steering arm through the linkage double pump make crawler tractor walking speed stepless adjustable to can realize tractor original place differential and turn to, zero turn.

Description

Walking steering linkage control mechanism of crawler tractor

Technical Field

The utility model relates to a tractor operating mechanism technical field, in particular to crawler tractor walking turns to linkage operating mechanism.

Background

For the crawler tractor, the advancing and the backing as well as the steering of the walking are controlled by different control mechanisms, so that the control mechanism has a relatively complex structure and is complex to operate.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem among the correlation technique, provide a crawler tractor walking turns to linkage operating mechanism, can the march of direct control crawler tractor walking retreat and turn to, easy operation is convenient, and the accuse left side steering arm and the accuse right side steering arm through the linkage double pump make crawler tractor walking speed stepless adjustable to can realize tractor pivot differential and turn to, zero turn.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme: a crawler tractor walking steering linkage control mechanism comprises:

the two ends of the rotating shaft arm are respectively connected with the left steering control arm and the right steering control arm through a pull rod assembly and a rocker arm assembly;

the steering gear comprises a steering gear, a steering gear arm, a sliding rail, a chassis base and a control lever, wherein the steering gear is arranged on the steering gear;

the steering cam is connected with the direction rotating arm and can drive the direction rotating arm to rotate;

the sleeve, the sleeve links to each other just with the steering wheel slidable mounting has the slip shaft in the sleeve.

Preferably, the pull rod assembly comprises a first pull rod, a second pull rod, a third pull rod and a fourth pull rod, and the rocker arm assembly comprises a first front rocker arm and a second front rocker arm; first pull rod and second pull rod are connected respectively to pivot arm both ends, first pull rod and second pull rod link to each other with the one end of rocking arm before first rocking arm and the second respectively, the one end of third pull rod and fourth pull rod is connected respectively to the other end of rocking arm before first rocking arm and the second, the other end of third pull rod and fourth pull rod is connected accuse left steering arm and accuse right steering arm respectively.

Preferably, the left side and the right side of the steering cam are both provided with limit protrusions for limiting the angle of the left-right rotation of the steering wheel.

Preferably, the direction tumbler is provided with a bearing, and the steering cam drives the direction tumbler to rotate through the bearing.

Preferably, a return spring is mounted on the direction rotating arm.

Preferably, the inner hole of the sleeve is a hexagonal hole, and the sliding shaft is a hexagonal shaft matched with the inner hole of the sleeve.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model can realize the advancing, retreating and steering of the walking of the crawler tractor through a set of control mechanism, and the operation is simple and convenient; the walking speed of the crawler tractor can be steplessly adjusted by linking a left steering arm and a right steering arm of the duplex pump, and the in-situ differential steering and zero turning of the tractor can be realized; the control lever, the pull rod and the like are linked to the double pump to control the right steering arm and the left steering arm to swing forwards or backwards in a consistent way, the rotation angles are the same, so that the flow entering the left walking motor and the right walking motor are the same in size and direction, the swing angle of the steering arm is changed within a certain range, and the flow entering the left motor and the right motor correspondingly is changed within a certain range, so that the stepless adjustment of the forward and backward speed of the tractor is realized; the direction rotating arm is provided with the return spring, and when the two hands are loosened after the steering wheel is rotated, the return spring can drive the direction rotating arm to automatically return, so that the steering wheel automatically returns, the operation is more labor-saving, and the steering wheel meets the ergonomics.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is an M-direction view of fig. 1 according to the present invention.

In the figure:

1. the steering mechanism comprises a rotating shaft arm, 2, a first pull rod, 3, a second pull rod, 4, a first front rocker arm, 5, a second front rocker arm, 6, a third pull rod, 7, a fourth pull rod, 8, a left steering arm, 9, a right steering arm, 10, a steering gear, 11, a sliding rail, 12, a fifth pull rod, 13, a control rod, 14, a steering cam, 15, a direction rotating arm, 1501, a bearing, 16, a sleeve, 17, a steering wheel, 18, a sliding shaft, 19 and a return spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

As shown in fig. 1 to 2, a walking steering linkage control mechanism of a crawler tractor comprises a rotating shaft arm 1, a steering gear 10, a steering cam 14 and a sleeve 16, wherein two ends of the rotating shaft arm 1 are respectively connected with a left steering control arm 8 and a right steering control arm 9 through a pull rod assembly and a rocker arm assembly; the rotating shaft arm 1 is arranged on a steering gear 10, the steering gear 10 is arranged on a slide rail 11 in a sliding manner, a chassis base of the steering gear 10 is connected with an operating rod 13 through a fifth pull rod 12, when the operating rod 13 is moved back and forth, the operating rod 13 drives the steering gear 10 to slide back and forth on the slide rail 11 through the fifth pull rod 12, and therefore the tractor is in a straight-line driving state; the steering cam 14 is connected with the direction rotating arm 15 and can drive the direction rotating arm 15 to rotate; the sleeve 16 is connected with a steering wheel 17, a sliding shaft 18 is arranged in the sleeve 16 in a sliding mode, and the sliding shaft 18 can slide along the axial direction of the sleeve 16, so that when the steering machine 10 is at any position of the slide rail 11, the sleeve 16 of the steering wheel 17 can transmit rotation to the sliding shaft 18, and the tractor can steer when moving forwards or backwards.

In one embodiment, the lever assembly comprises a first lever 2, a second lever 3, a third lever 6 and a fourth lever 7, the rocker arm assembly comprising a first front rocker arm 4 and a second front rocker arm 5; the two ends of the rotating shaft arm 1 are respectively connected with a first pull rod 2 and a second pull rod 3, the first pull rod 2 and the second pull rod 3 are respectively connected with one ends of a first front rocker arm 4 and a second front rocker arm 5, the other ends of the first front rocker arm 4 and the second front rocker arm 5 are respectively connected with one ends of a third pull rod 6 and a fourth pull rod 7, and the other ends of the third pull rod 6 and the fourth pull rod 7 are respectively connected with a left steering control arm 8 and a right steering control arm 9.

In one embodiment, the left and right sides of the steering cam 14 are each provided with a limit projection that defines an angle of rotation of the steering wheel 17 to the left and right.

In one embodiment, the direction arm 15 is mounted with a bearing 1501, and the steering cam 14 rotates the direction arm 15 through the bearing 1501.

In one embodiment, the direction rotating arm 15 is provided with a return spring 19, so that when the hands are released after the steering wheel 17 is turned, the return spring 19 can drive the direction rotating arm 15 to automatically return, thereby the steering wheel 17 is automatically returned, the operation is more labor-saving and the ergonomics is good.

In one embodiment, the inner bore of the sleeve 16 is a hex socket and the sliding shaft 18 is also a hex socket that mates with the inner bore of the sleeve 16.

The working principle is as follows:

when the tractor runs in a straight line: the steering gear 10 is connected with a first front rocker arm 4 and a second front rocker arm 5 through a first pull rod 2 and a second pull rod 3 on a rotating shaft arm 1, the first front rocker arm 4 and the second front rocker arm 5 are respectively connected with a left steering arm 8 and a right steering arm 9 of the twin pump through a third pull rod 6 and a fourth pull rod 7, a base plate of the steering gear 10 is connected with an operating rod 13 through a fifth pull rod 12, when the operating rod 13 is moved back and forth, the operating rod 13 drives the steering gear 10 to slide back and forth on a sliding rail 11 through the fifth pull rod 12, at the moment, the tractor is in a straight driving state, a user holds a steering wheel 17 and does not rotate, so that the rotating shaft arm 1 does not rotate, the first front rocker arm 4 and the second front rocker arm 5 do not rotate and the position opposite to the steering gear 10 keeps unchanged, when the steering gear 10 slides back along the sliding rail front 11, the first front rocker arm 4 and the second front rocker arm 5 drive the left steering arm 8 and the right steering arm 9 to swing forwards or backwards in a consistent manner, therefore, the flow rate of the left and right traveling motors controlled by the duplex pump is the same in direction, when the steering gear 10 is positioned on the slide rail 11 and changes, the left control steering arm 8 and the right control steering arm 9 swing forwards or backwards in a consistent manner, the rotation angles are the same, the flow rate and the direction of the left and right traveling motors are the same, the swing angles of the left control steering arm 8 and the right control steering arm 9 are changed within a certain range, and the flow rate of the left and right traveling motors is changed within a certain range correspondingly, so that the stepless adjustment of the advancing and retreating speed of the tractor is realized.

When the tractor turns to: when the steering wheel 17 is rotated, the sleeve 16 rotates by a certain angle to drive the sliding shaft 18 to rotate and enable the steering cam 14 to rotate by a corresponding angle, after the steering cam 14 rotates, the steering shaft arm 1 rotates through the steering gear 10, the first front rocker arm 4 and the second front rocker arm 5 rotate in opposite directions through the first pull rod 2 and the second pull rod 3, the first front rocker arm 4 and the second front rocker arm 5 respectively enable the left control steering arm 8 and the right control steering arm 9 on the dual pump to swing oppositely through the third pull rod 6 and the fourth pull rod 7, so that the flow entering the left motor and the right motor are different in size, the left motor and the right motor have difference, and the tractor can realize rotating speed in forward, backward or in-situ steering; when the hand releases the steering wheel 17, the return spring 19 returns the steering cam 14 to the neutral position via the direction rotating arm 15, and the steering wheel 17 returns to the neutral position.

The above is the preferred embodiment of the present invention, and the technical personnel in the field of the present invention can also change and modify the above embodiment, therefore, the present invention is not limited to the above specific embodiment, and any obvious improvement, replacement or modification made by the technical personnel in the field on the basis of the present invention all belong to the protection scope of the present invention.

Claims

1. The utility model provides a crawler tractor walking turns to linkage operating mechanism which characterized in that includes:

the steering mechanism comprises a rotating shaft arm (1), wherein two ends of the rotating shaft arm (1) are respectively connected with a left steering control arm (8) and a right steering control arm (9) through a pull rod assembly and a rocker arm assembly;

the steering gear box comprises a steering gear box (10), wherein a rotating shaft arm (1) is arranged on the steering gear box (10), the steering gear box (10) is arranged on a sliding rail (11) in a sliding mode, and a chassis base of the steering gear box (10) is connected with an operating rod (13) through a fifth pull rod (12);

the steering cam (14), the said steering cam (14) links with direction tumbler (15) and can drive the direction tumbler (15) to rotate;

the sleeve (16) is connected with the steering wheel (17), and a sliding shaft (18) is installed in the sleeve (16) in a sliding mode.

2. The crawler tractor walk steering linkage according to claim 1, characterized in that: the pull rod assembly comprises a first pull rod (2), a second pull rod (3), a third pull rod (6) and a fourth pull rod (7), and the rocker arm assembly comprises a first front rocker arm (4) and a second front rocker arm (5); first pull rod (2) and second pull rod (3) are connected respectively to pivot arm (1) both ends, first pull rod (2) and second pull rod (3) link to each other with the one end of rocking arm (5) before first rocking arm (4) and the second respectively, the one end of third pull rod (6) and fourth pull rod (7) is connected respectively to the other end of rocking arm (5) before first rocking arm (4) and the second, the other end of third pull rod (6) and fourth pull rod (7) is connected respectively and is controlled left steering arm (8) and control right steering arm (9).

3. The crawler tractor walk steering linkage according to claim 1, characterized in that: the left side and the right side of the steering cam (14) are both provided with limiting bulges which limit the angle of the steering wheel (17) rotating left and right.

4. The crawler tractor walk steering linkage according to claim 1, characterized in that: the direction tumbler (15) is provided with a bearing (1501), and the steering cam (14) drives the direction tumbler (15) to rotate through the bearing (1501).

5. The crawler tractor walk steering linkage according to claim 1, characterized in that: and a return spring (19) is arranged on the direction rotating arm (15).

6. The crawler tractor walk steering linkage according to claim 1, characterized in that: the inner hole of the sleeve (16) is a hexagonal hole, and the sliding shaft (18) is a hexagonal shaft matched with the inner hole of the sleeve (16).