CN112937705A

CN112937705A - Rubber track chassis system and engineering machinery

Info

Publication number: CN112937705A
Application number: CN202110270661.6A
Authority: CN
Inventors: 吕晓晓; 宋康; 施晓明
Original assignee: Xuzhou Construction Machinery Group Co Ltd XCMG
Current assignee: Xuzhou Construction Machinery Group Co Ltd XCMG
Priority date: 2021-03-12
Filing date: 2021-03-12
Publication date: 2021-06-11
Anticipated expiration: 2041-03-12
Also published as: CN112937705B

Abstract

The invention discloses a rubber crawler chassis system and engineering machinery. The rubber track chassis system comprises a loading wheel set, a guide wheel, a rubber track, a tensioning device and a buffer oil cylinder, wherein the loading wheel set comprises a loading wheel and a loading wheel support. The rubber track is mounted around the outer sides of the load wheel group and the guide wheel. The tensioning device comprises a tensioning oil cylinder, a tensioning support and a brake arm. The cylinder barrel of the tensioning oil cylinder is connected with a tensioning support, the tensioning support is hinged with a brake arm, and the brake arm is connected with the guide wheel. The buffer oil cylinder is arranged in the tensioning support, the upper end of the buffer oil cylinder is hinged with the tensioning support, and the lower end of the buffer oil cylinder is hinged with the brake arm and the bogie wheel support. The upper end of the buffer oil cylinder is hinged with the tensioning support, and the lower end of the buffer oil cylinder is hinged with the brake arm and the bogie wheel bracket to absorb the impact of the ground vertical load transmitted by the bogie wheel set, so that the impact resistance of the chassis system in the vertical direction is improved.

Description

Rubber track chassis system and engineering machinery

Technical Field

The invention relates to a rubber crawler chassis system and engineering machinery.

Background

Recently, the requirements of the customers on the running speed, the driving comfort and the trafficability characteristic are higher and higher, so that the high-efficiency stability of the traveling system of the engineering machinery vehicle is particularly important. When the crawler mechanism is impacted by the ground in the walking process, the tensioning device in the walking system plays a role in buffering, so that parts of the crawler mechanism are prevented from being overloaded, and the vibration and the jumping of the crawler can be reduced. However, the track must have a proper tension, too much tension can increase friction between the track and a wheel system, accelerate abrasion and cause power loss, too little tension can cause track vibration and reduce running stability, and even cause track derailment in a turning or reversing process.

Fig. 1 shows a structure of a related art tensioner. The tensioning device comprises an energy accumulator 1, a charging door 2, a cylinder 3 and a plunger rod 4. Wherein the plunger rod 4 is connected to a guide frame 5 mounting a guide wheel 6.

It is important to note here that the statements in this background section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

Disclosure of Invention

The above tensioner can absorb the impact in the track running direction, but has no buffer and shock absorption effect on the vertical load, that is, the impact resistance in the vertical direction is poor.

In view of the above, the invention provides a rubber track chassis system and an engineering machine, so as to improve the impact resistance in the vertical direction.

The present invention provides in a first aspect a rubber track undercarriage system comprising:

the loading wheel group comprises a loading wheel and a loading wheel bracket;

a guide wheel;

a rubber crawler belt which is mounted around the outer sides of the load wheel group and the guide wheel;

the tensioning device comprises a tensioning oil cylinder, a tensioning support and a brake arm, wherein a cylinder barrel of the tensioning oil cylinder is connected with the tensioning support, the tensioning support is hinged with the brake arm, and the brake arm is connected with the guide wheel; and

and the buffer oil cylinder is arranged in the tensioning support, the upper end of the buffer oil cylinder is hinged with the tensioning support, and the lower end of the buffer oil cylinder is hinged with the brake arm and the bogie wheel bracket.

In some embodiments, the tensioning support penetrates through the tensioning support from top to bottom in the height direction, and the buffer oil cylinder penetrates through the tensioning support.

In some embodiments, the tensioning device further comprises a damping cylinder hinged plate, wherein the damping cylinder hinged plate is arranged at the upper end of the tensioning support and is configured to be hinged with the damping cylinder.

In some embodiments, the brake arm extends in a front-rear direction and includes a first hinge hole at a front side where the brake arm is hinged to the bogie carriage and the cushion cylinder and a second hinge hole at a rear side where the brake arm is hinged to the tension bracket.

In some embodiments, the vehicle further comprises a frame, a suspension cylinder and a swing arm, wherein the upper end of the suspension cylinder and the frame are rotatably connected to the frame at a first position, the lower end of the suspension cylinder and the swing arm are rotatably connected, the swing arm and the frame are rotatably connected to the frame at a second position, and the frame, the suspension cylinder and the swing arm form a triangle together.

In some embodiments, the swing arm comprises a swing arm body, an eccentric shaft and a flange sleeve, wherein the swing arm body comprises a first arm and a second arm which are perpendicular to each other, the eccentric shaft is vertically arranged on the first arm and can be rotatably arranged on the tensioning support, the flange sleeve is arranged on the second arm and is fixedly connected with the vehicle frame, and the second arm is rotatably arranged relative to the center of the flange sleeve.

In some embodiments, the first arm includes a cylindrical cavity at the end, the axis of the cylindrical cavity and the axis of the second arm are parallel to each other, the eccentric shaft is mounted on the cylindrical cavity and the axis of the eccentric shaft is eccentrically disposed with respect to the axis of the cylindrical cavity.

The invention provides engineering machinery comprising the rubber crawler chassis system.

Based on the technical scheme provided by the invention, the rubber track chassis system comprises a loading wheel set, a guide wheel, a rubber track, a tensioning device and a buffer oil cylinder, wherein the loading wheel set comprises a loading wheel and a loading wheel bracket. The rubber track is mounted around the outer sides of the load wheel group and the guide wheel. The tensioning device comprises a tensioning oil cylinder, a tensioning support and a brake arm. The cylinder barrel of the tensioning oil cylinder is connected with a tensioning support, the tensioning support is hinged with a brake arm, and the brake arm is connected with the guide wheel. The buffer oil cylinder is arranged in the tensioning support, the upper end of the buffer oil cylinder is hinged with the tensioning support, and the lower end of the buffer oil cylinder is hinged with the brake arm and the bogie wheel support. According to the rubber crawler chassis system, the buffer oil cylinder is arranged in the tensioning support, the upper end of the buffer oil cylinder is hinged with the tensioning support, and the lower end of the buffer oil cylinder is hinged with the brake arm and the bogie wheel bracket to absorb the impact of the ground vertical load transmitted by the bogie wheel set, so that the impact resistance of the chassis system in the vertical direction is improved.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a schematic structural view of a related art tensioner;

FIG. 2 is a schematic structural view of a rubber track undercarriage system according to an embodiment of the present invention;

FIG. 3 is a schematic view of the tensioner of FIG. 2;

FIG. 4 is a schematic structural view of the swing arm of FIG. 3;

FIG. 5 is a schematic structural view of the swing arm main body in FIG. 4;

FIG. 6 is a schematic view of the structure of the load-bearing wheel set of FIG. 3;

FIG. 7 is a schematic view of the structure of the brake arm of FIG. 3;

fig. 8 is a schematic structural view of the tensioning cylinder and the tensioning mount in fig. 3.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

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 unless specifically stated otherwise. 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.

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 positioned and the spatially relative descriptors used herein interpreted accordingly.

In the related art rubber crawler chassis system, the braking of the crawler belt is mostly from the driving wheel traveling motor, but there is no damping effect of the buffer in the vertical direction, that is, the shock resistance in the vertical direction is poor.

In view of this, the embodiment of the present invention provides a rubber track chassis system. In some embodiments, referring to fig. 2-8, the rubber track undercarriage system includes a set of weight wheels 56, guide wheels 54, a rubber track, a tensioner, and a cushion cylinder 57. Wherein the load wheel set 56 includes a load wheel 561 and a load wheel bracket 562. Rubber tracks are fitted around the outside of the bogie wheels 561 and the guide wheels 54. The tensioning device comprises a tensioning oil cylinder 59, a tensioning support 80 and a brake arm 60, wherein the cylinder barrel of the tensioning oil cylinder 59 is connected with the tensioning support 80, the tensioning support 80 is hinged with the brake arm 60, and the brake arm 60 is connected with the guide wheel 54. The buffer oil cylinder 57 is arranged in the tensioning support 80, the upper end of the buffer oil cylinder 57 is hinged with the tensioning support 80, and the lower end of the buffer oil cylinder 57 is hinged with the brake arm 60 and the bogie wheel bracket 562.

The rubber crawler chassis system is characterized in that a buffer oil cylinder 57 is arranged in a tensioning support 80, the upper end of the buffer oil cylinder 57 is hinged with the tensioning support 80, and the lower end of the buffer oil cylinder 57 is hinged with a brake arm 60 and a bogie wheel bracket 562 to absorb the impact of the ground vertical load transmitted by a bogie wheel set, so that the impact resistance of the chassis system in the vertical direction is improved. And the buffer oil cylinder is arranged in the tensioning support, so that the structure is compact, and the space is saved.

Furthermore, when the cushion cylinder 57 is extended, the guide wheel 54 is raised, so that the reverse supporting force of the guide wheel 54 against the ground becomes small, and the reverse supporting force of the load wheel group 56 becomes large; on the other hand, when the cushion cylinder 57 is shortened, the reverse supporting force of the guide wheels 54 against the ground becomes large, and the reverse supporting force of the load wheel group 56 becomes small. Therefore, the buffer oil cylinder 57 acts to distribute the force between the guide wheel 54 and the load wheel set 56.

In some embodiments, referring to fig. 3, the tension bracket 80 is vertically penetrated in the height direction, and the damping cylinder 57 is inserted into the tension bracket 80. Specifically, referring to fig. 8, the tension supporter 80 is a frame structure through which the damping cylinder 57 passes in the up-down direction so as to be capable of being hinged with a bogie bracket 562 provided at the lower side of the tension supporter 80.

In some embodiments, referring to fig. 8, a cushion cylinder hinge plate 64 is also included. The damping cylinder hinge plate 64 is provided at an upper end of the tension supporter 80 and is configured to be hinged with the damping cylinder 57.

In some embodiments, referring to fig. 3 and 7, the brake arm 60 extends in the front-rear direction and includes a first hinge hole 602 at the front side and a second hinge hole 601 at the rear side. The brake arm 60 is hinged to the bogie bracket 562 and the damping cylinder 57 at the first hinge hole 602, and the brake arm 60 is hinged to the tension bracket 80 at the second hinge hole 601. As shown in fig. 6, the load wheel set 56 includes four load wheels 561, a load wheel support 562 and a load wheel axle 563, wherein the load wheel axle 563 is rigidly connected to the load wheel support 562 through tight fit, and two rolling bearings are disposed in the load wheels 561, so that the load wheels can rotate around the load wheel axle 563, and realize rolling friction with the track, and simultaneously transmit the acting force on the ground. Through the distance between the two bogie wheels arranged on the bogie axle 563, the crawler is limited in the distance, and the deviation of the crawler is prevented. The bogie 562 is hinged to the brake arm 60 and the lower end of the cushion cylinder 57. The brake arm 60 is rigidly connected to the brake 55 by bolts and to the tension bracket 80, ensuring a reliable connection of the whole mechanism.

In some embodiments, referring to fig. 2, further includes a carriage 70, a suspension cylinder 52, and a swing arm 58. The upper end of suspension cylinder 52 and frame 70 are rotatably connected to a first position of frame 70, the lower end of suspension cylinder 52 and swing arm 58 are rotatably connected, swing arm 58 and frame 70 are rotatably connected to a second position of frame 70, and frame 70, suspension cylinder 52 and swing arm 58 together form a triangle. The suspension cylinder 52 connects the frame 70 with the swing arm 58, absorbs ground impact and has the purpose of buffering and damping, and the whole is arranged in a triangle shape, so that the stability is high.

In some embodiments, referring to fig. 4, the swing arm 58 includes a swing arm body 582, an eccentric shaft 581, and a flange sleeve 583. Wherein, referring to fig. 5, the swing arm body 582 includes a first arm 5822 and a second arm 5823 that are perpendicular to each other. The eccentric shaft 581 is vertically disposed on the first arm 5822 and rotatably mounted on the tension bracket 80, the flange 583 is mounted on the second arm 5823, the flange 583 is fixedly connected to the frame 70, and the second arm 5823 is rotatably disposed relative to the center of the flange 583. And the swing arm main body 582 can rotate around the center of the flange sleeve 583, so that after the flange sleeve 583 is rigidly connected with the frame 70, the swing arm main body 582 has a degree of freedom of rotation relative to the frame 70, and when the stroke of the suspension oil cylinder 52 changes, the swing arm 58 rotates in a self-adaptive manner, so that the purpose of buffering and damping of the suspension oil cylinder is achieved.

In some embodiments, referring to fig. 5, the first arm 5822 includes a cylindrical cavity at the end, the axis X1 of the cylindrical cavity being parallel to the axis X2 of the second arm 5823. Eccentric shaft 581 is mounted on a cylindrical cavity and the axis of eccentric shaft 581 is eccentrically disposed with respect to the axis of the cylindrical cavity. When the tensioning cylinder 59 is extended, the eccentric shaft 581 rotates around the axis X1, and simultaneously drives the brake 55 and the guide wheel 54 to move forward and upward, so as to complete tensioning of the track, and the accumulator maintains pressure of the tensioning cylinder in real time, thereby ensuring the tension of the track.

The embodiment of the invention also provides engineering machinery comprising the rubber track chassis system.

The structure of a rubber track undercarriage system according to an embodiment of the present invention will be described in detail with reference to fig. 2 to 8.

As shown in fig. 2, in this embodiment, the rubber track undercarriage system includes a frame 70, a suspension cylinder 52, a swing arm 58, a tensioning cylinder 59, a cushion cylinder 57, and guide wheels 54.

As shown in fig. 2, the upper end of the suspension cylinder 52 is hinged to the frame 70 through a pin 51. The lower end of the suspension cylinder 52 is hinged with a hinge seat 5821 arranged on the swing arm 58 through a pin shaft 53. The swing arm 58 is rotatably connected with the frame 70, and the position where the swing arm 58 is rotatably connected with the frame 70 is different from the position where the suspension cylinder 52 is hinged with the frame 70, so that the frame 70, the suspension cylinder 52 and the swing arm 58 form a triangle together, and the stability is high.

As shown in fig. 2 and 3, the guide wheels 54 are rigidly connected to the brake 55 by bolts, and the two guide wheels 54 are symmetrically arranged on both sides of the brake 55. The braking torque of the brake 55 is thus transmitted directly to the track via the idler wheel 54 to effect braking of the whole machine.

As shown in fig. 3 and 6, the load wheel set 56 includes four load wheels 561, a load wheel holder 562 and a load wheel axle 563, wherein the load wheel axle 563 is rigidly connected to the load wheel holder 562 through tight fit, and two rolling bearings are disposed in the load wheel 561 to realize rotation around the load wheel axle 563, realize rolling friction with the track, and transmit the acting force on the ground. The track is limited in the distance through the distance between the two bogie wheels 561 arranged on the bogie axle 563, so that the deviation of the track is prevented. The bogie 562 is connected with the brake arm 60 and the lower hinge point of the buffer cylinder 57 through a pin 62. The brake arm 60 is rigidly connected with the brake 55 through a bolt, and is connected with the tensioning support 80 through the pin 61, so that the connection of the whole mechanism is ensured to be reliable. In order to realize the hinge connection of the pin shaft 61 and the pin shaft 62 with the brake arm 60, sliding bearings are respectively arranged in two mounting holes of the brake arm 60, and a lubricating oil passage of lubricating grease is designed to ensure the rotating effectiveness.

The upper hinge point of the buffer oil cylinder 57 is hinged with the tensioning support 80 through two buffer oil cylinder hinge plates 64, the lower hinge point is connected with the brake arm 60 and the bogie wheel bracket 562 through a pin shaft 62 to absorb the impact of the ground vertical load transmitted by the bogie wheel set 56, and the buffer oil cylinder 57 is arranged in the tensioning support 80, so that the structure is compact, and the space is saved.

The structure of the swing arm 58 is shown in fig. 4. The swing arm 58 includes an eccentric shaft 581, a swing arm body 582, and a flange sleeve 583. Wherein the swing arm body 582 is an L-shaped arm, as shown in fig. 5, and includes a first arm 5822 and a second arm 5823 that are perpendicular to each other. The first arm 5822 comprises a cylindrical cavity at the end, the axis X1 of which is parallel to the axis X2 of the second arm 5823. As shown in fig. 4, the eccentric shaft 581 is mounted on the cylindrical cavity on the opposite side of the side where the first arm 5822 is located. The axis of the eccentric shaft 581 is eccentrically disposed with respect to the axis X1 of the cylindrical cavity. The flange sleeve 583 is internally provided with a step hole, and after the sliding bearing is installed, relative rotation of different parts is realized. The flange sleeve 583 is screwed with the whole vehicle frame 70, and the swing arm main body 582 can rotate around the center of the flange sleeve, so that after the flange sleeve 583 is rigidly connected with the vehicle frame 70, the swing arm main body 582 has a degree of freedom of rotation relative to the vehicle frame 70. When the stroke of the suspension oil cylinder 52 changes, the swing arm rotates in a self-adaptive manner to achieve the purpose of buffering and damping of the suspension oil cylinder. And the swing arm is provided with a filling port and a lubricating oil passage of lubricating grease, so that the flexibility and the reliability of the rotation of the swing arm are ensured. The eccentric shaft 581 can rotate about the axis X1 to ensure the force transmission effectiveness of the tensioning mechanism, and the swing arm 58 is mounted in the tensioning mount mounting hole 64 by the eccentric shaft 581, and is axially positioned by a round nut. In order to ensure that the eccentric shaft 581 can freely rotate around the tension bracket mounting hole 64, a sliding bearing stepped hole is designed in the tension bracket mounting hole 64.

As shown in fig. 2, the tensioning cylinder 59 is hinged to the frame 70 by a pin 510 to provide support for the tensioning cylinder 59, while the tensioning cylinder 59 has freedom to rotate about the hinge point. When the tensioning oil cylinder extends, the eccentric shaft 581 rotates around the X1 axis, and simultaneously drives the brake and the guide wheel to move forwards and upwards to complete tensioning of the crawler belt, and meanwhile, the energy accumulator maintains pressure of the tensioning oil cylinder in real time to ensure the tensioning degree of the crawler belt.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.

Claims

1. A rubber track undercarriage system, comprising:

a load wheel group (56) comprising a load wheel (561) and a load wheel bracket (562);

a guide wheel (54);

a rubber crawler belt mounted around the outer sides of the load wheel group (56) and the guide wheel (54);

the tensioning device comprises a tensioning oil cylinder (59), a tensioning support (80) and a brake arm (60), wherein the cylinder barrel of the tensioning oil cylinder (59) is connected with the tensioning support (80), the tensioning support (80) is hinged with the brake arm (60), and the brake arm (60) is connected with the guide wheel (54); and

buffer cylinder (57), set up in inside tensioning support (80), just buffer cylinder (57) the upper end with tensioning support (80) are articulated, buffer cylinder (57) the lower extreme with brake arm (60) with bogie wheel support (562) are articulated.

2. The rubber track undercarriage system of claim 1 wherein the tensioning mount (80) extends vertically therethrough in a height direction, and the cushion cylinder (57) is disposed through the tensioning mount (80).

3. The rubber track undercarriage system of claim 1 further comprising a damping cylinder hinge plate (63), the damping cylinder hinge plate (63) disposed at an upper end of the tensioning mount (80) and configured to articulate with the damping cylinder (57).

4. The rubber track undercarriage system of claim 1 wherein the brake arm (60) extends in a fore-aft direction and includes a first hinge hole (602) at a front side where the brake arm (60) is hinged to the bogie bracket (562) and the cushion cylinder (57) and a second hinge hole (601) at a rear side where the brake arm (60) is hinged to the tension bracket (80).

5. The rubber track undercarriage system of claim 1 further comprising a frame (70), a suspension cylinder (52), and a swing arm (58), wherein an upper end of the suspension cylinder (52) is rotatably coupled to the frame (70) at a first location, wherein a lower end of the suspension cylinder (52) is rotatably coupled to the swing arm (58), wherein the swing arm (58) is rotatably coupled to the frame (70) at a second location, wherein the frame (70), the suspension cylinder (52), and the swing arm (58) collectively form a triangle.

6. The rubber track undercarriage system of claim 5 wherein the swing arm (58) comprises a swing arm body (582), an eccentric shaft (581), and a flange bushing (583), the swing arm body (582) comprising a first arm (5822) and a second arm (5823) perpendicular to each other, the eccentric shaft (581) being vertically disposed on the first arm (5822) and rotatably mounted on the tensioning mount (80), the flange bushing (583) being mounted on the second arm (5823) and the flange bushing (583) being fixedly connected to the frame (70), the second arm (5823) being rotatably disposed relative to a center of the flange bushing (583).

7. The rubber track undercarriage system of claim 6 wherein the first arm (5822) comprises a cylindrical cavity at the end, the axis (X1) of the cylindrical cavity being parallel to the axis (X2) of the second arm (5823), the eccentric shaft (581) being mounted on the cylindrical cavity and the axis of the eccentric shaft (581) being eccentrically arranged with respect to the axis (X1) of the cylindrical cavity.

8. A working machine, characterized by comprising a rubber track undercarriage system according to any of claims 1-7.