CN114954201A

CN114954201A - Foldable trailing arm structure and clearance barrier vehicle

Info

Publication number: CN114954201A
Application number: CN202210816783.5A
Authority: CN
Inventors: 宋银柱
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2022-08-30

Abstract

The invention provides a foldable trailing arm structure and an obstacle removing vehicle, wherein the foldable trailing arm structure mainly comprises a trailing arm hanging bracket, a trailing arm assembly, a primary trailing arm, a secondary trailing arm and a cross arm tire embracing assembly, wherein the trailing arm assembly is hinged on the trailing arm hanging bracket and can rotate around a hinge point under the driving of a trailing arm lifting device; the supporting arm assembly is connected with a primary supporting arm and a secondary supporting arm, the tail end of the secondary supporting arm is connected with a cross arm tire-embracing assembly through a hinge base, and when the secondary supporting arm retracts into the primary supporting arm, the cross arm tire-embracing assembly is overturned upwards under the limiting action of the tail end of the primary supporting arm to automatically complete the folding action; when the second-stage bracket arm extends out, the cross arm tire-holding assembly turns downwards under the action of gravity to recover the working state. The folding type bracket arm has the advantages that the structural design is ingenious, the folding action on the cross arm tire-embracing assembly is automatically completed in the process of contracting the secondary bracket arm, other driving devices are not needed, the driving system of the bracket arm obstacle clearing device is simplified, and the storage space is saved.

Description

Foldable trailing arm structure and clearance barrier vehicle

Technical Field

The invention belongs to the technical field of vehicles, and particularly relates to a folding type supporting arm structure and an obstacle removing vehicle.

Background

The trailing arm structure is the core part of the vehicle that clears up the obstacles for lift and pull trouble vehicle, and the trailing arm structure among the prior art has the problem that the structure is complicated, occupation space is big, has restricted the miniaturization of the vehicle that clears up the obstacles. However, the large obstacle clearance vehicle has a certain length, the turning radius is too large when the large obstacle clearance vehicle drags the fault vehicle, the trafficability of the large obstacle clearance vehicle is poor, and the large obstacle clearance vehicle is difficult to be applied in a relatively narrow rescue occasion.

Therefore, it is necessary to provide a bracket arm structure with a simple structure and a small occupied space.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a folding type supporting arm structure which is simplified in structure, small in occupied space and suitable for being mounted on various obstacle removing vehicles. The specific technical scheme is as follows:

a folding type trailing arm structure comprises a trailing arm hanging bracket, a trailing arm assembly, a primary trailing arm, a secondary trailing arm and a cross arm tire-holding assembly; the supporting arm hanging bracket is arranged on a chassis girder of the vehicle, the supporting arm assembly is hinged on the supporting arm hanging bracket, the supporting arm assembly is connected with a supporting arm lifting device, and the supporting arm assembly can rotate around a hinge point under the driving of the supporting arm lifting device; the first-stage supporting arm is connected to the supporting arm assembly, the second-stage supporting arm is connected to the inside of the first-stage supporting arm through a supporting arm telescopic mechanism, a hinged seat is arranged on the upper portion of the tail end of the second-stage supporting arm, and a cross arm tire embracing assembly is connected to the upper portion of the tail end of the second-stage supporting arm through the hinged seat.

Wherein the upper cover plate of the primary bracket arm is at least partially open so as to accommodate the hinge mount when the secondary bracket arm is in a retracted state; the size of the end part of the cross arm tire embracing assembly is larger than that of the tail end of the first-level supporting arm, so that when the second-level supporting arm retracts into the first-level supporting arm, the cross arm tire embracing assembly turns upwards under the limiting action of the tail end of the first-level supporting arm, and the folding action is automatically finished.

Specifically, the supporting arm lifting device is a supporting arm lifting oil cylinder, one end of the supporting arm lifting oil cylinder is connected to a chassis crossbeam of the vehicle, and the other end of the supporting arm lifting oil cylinder is connected to the supporting arm assembly.

Specifically, the bracket arm assembly is fixedly or movably connected with the primary bracket arm. Preferably, the bracket arm assembly and the first-stage bracket arm are movably connected through a steel ball steering mechanism: the steel ball steering mechanism comprises a steering mechanism body, a steering mechanism shell and a central shaft, wherein the steering mechanism shell is sleeved on the steering mechanism body, the steering mechanism body and the steering mechanism shell are hinged through the central shaft, a plurality of spring accommodating cavities are formed in the steering mechanism body, springs are installed in the spring accommodating cavities, positioning steel balls are arranged at the tail ends of the springs, and the positioning steel balls are jacked on the steering mechanism shell by the springs. Furthermore, positioning pin mounting holes are formed in the steering mechanism body and the steering mechanism shell.

Specifically, the supporting arm telescopic mechanism is selected from any one of a hydraulic oil cylinder, a hydraulic motor or a stepping motor, and is preferably a hydraulic oil cylinder.

Specifically, the tire holding assembly with the cross arm is connected with a tire holding frame, and a tire holding device is arranged on the tire holding frame.

Specifically, the tire embracing frame can be fixedly connected to the cross arm tire embracing assembly and can also be rotatably connected to the cross arm tire embracing assembly through a swinging shaft.

In a second aspect of the invention, the invention provides an obstacle clearance vehicle, wherein the foldable bracket arm structure is arranged on a chassis crossbeam of the obstacle clearance vehicle.

Further, the rear part of the vehicle is provided with an accommodating cavity which can provide an accommodating space for the folding type supporting arm structure under the condition that the folding type supporting arm structure is lifted to the maximum stroke. Specifically, the accommodating cavity can be of a groove type design, the shape of the groove is matched with that of the folding type supporting arm structure, and the accommodating cavity can also be a conventional carriage, in this case, a rear cover plate of the carriage can be in an upturned or side-opened mode so as to be closed after the folding type supporting arm structure is accommodated.

The folding type supporting arm provided by the invention is ingenious in structural design, the supporting arm telescopic mechanism automatically finishes the folding action of the cross arm tire-holding assembly in the process of contracting the secondary supporting arm, other driving devices are not needed, the driving system of the supporting arm obstacle clearing device is simplified, the occupied space of the folded supporting arm is smaller, and the storage space is saved.

Drawings

The foregoing and other objects, features and advantages of the disclosure will be apparent from the following more particular descriptions of exemplary embodiments of the disclosure as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the disclosure.

FIG. 1 is a schematic view of the installation of a folding bracket structure at the tail of a vehicle in the embodiment;

FIG. 2 is a partial schematic view of an embodiment of a folding bracket structure;

FIG. 3 is a top view of an embodiment of a folding bracket structure;

FIG. 4 is a schematic view of the folding bracket arm structure in the embodiment;

FIG. 5 is a view showing a state where the folding bracket structure is stored at the rear of the vehicle in the embodiment;

fig. 6 is a schematic view of the working state of the folding bracket arm structure in the embodiment.

Description of reference numerals: 1-a trailing arm hanger; 2-a trailing arm assembly; 21-a supporting arm hanging plate; 22-a bracket arm base; 23-a supporting arm overturning seat; 3-first-stage supporting arm; 31-a bracket arm telescopic mechanism; 4-a secondary bracket arm; 41-a hinged seat; 5-a cross arm tire clasping assembly; 51-a swing shaft; 52-clamping a jig frame; 6-chassis girder; 7-supporting arm lifting oil cylinder; 8-compartment; 81-rear cover plate; 9-steel ball steering mechanism; 91-a steering mechanism body; 92-a steering mechanism housing; 93-central axis; 94-locating pin mounting holes; 95-positioning the steel ball.

Detailed Description

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The term "include" and variations thereof as used herein is meant to be inclusive in an open-ended manner, i.e., "including but not limited to". Unless specifically stated otherwise, the term "or" means "and/or". The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like may refer to different or the same object. Other explicit and implicit definitions are also possible below.

As shown in fig. 1, the foldable trailing arm structure provided by this embodiment mainly includes a trailing arm hanger 1, a trailing arm assembly 2, a primary trailing arm 3, a secondary trailing arm 4, and a cross arm tire-embracing assembly 5.

The supporting arm hanging bracket 1 is arranged on a chassis girder 6 of the vehicle, and the lower end of the supporting arm hanging bracket 1 is hinged with the supporting arm assembly 2. The supporting arm assembly 2 is connected with a supporting arm lifting device, specifically, the supporting arm lifting oil cylinder 7 in the embodiment, and the supporting arm assembly 2 can be driven to rotate around the hinge point through the telescopic action of the supporting arm lifting oil cylinder 7, so that the lifting action of the whole supporting arm structure is realized.

Fig. 2 shows a detailed view of the folding bracket structure. As shown in fig. 2, the trailing arm assembly 2 in this embodiment specifically includes three portions, namely, a trailing arm hanging plate 21, a trailing arm base 22, and a trailing arm overturning seat 23, wherein the upper end of the trailing arm hanging plate 21 is hinged to the lower end of the trailing arm hanger 1, the trailing arm hanging plate 21 is fixedly connected to the trailing arm base 22, and the trailing arm base 22 is hinged to the trailing arm overturning seat 23. When the bracket arm is turned upwards around the hinge point, the bracket arm turning seat 23 can also be turned upwards relative to the bracket arm base 22. In other embodiments, the bracket arm assembly 2 may be provided as a rigid unit.

The bracket arm assembly 2 is rotatably connected with a first-stage bracket arm 3, a second-stage bracket arm 4 is accommodated in the first-stage bracket arm 3, and the telescopic action of the second-stage bracket arm 4 is realized through a bracket arm telescopic mechanism 31. The supporting arm extending and retracting mechanism 31 in this embodiment is specifically a hydraulic cylinder.

Figure 3 shows a top view of the folding bracket structure in which the secondary bracket 4 has been retracted inside the primary bracket 3. As shown in fig. 2 and 3, the bracket arm assembly 2 and the first-stage bracket arm 3 are movably connected through a steel ball steering mechanism 9. The steel ball steering mechanism 9 comprises a steering mechanism body 91, a steering mechanism shell 92 and a central shaft 93, wherein the steering mechanism shell 92 is sleeved on the steering mechanism body 91, and the steering mechanism shell 92 and the steering mechanism body are hinged through the central shaft 93. In the present embodiment, the steering mechanism body 91 is provided on the trailing arm assembly 2, and the steering mechanism housing 92 is provided on the primary trailing arm 3. Of course, the opposite arrangement can achieve similar effects.

The steering mechanism body 91 is provided with a plurality of spring accommodating cavities, springs are mounted in the spring accommodating cavities, positioning steel balls 95 are arranged at the tail ends of the springs, and the positioning steel balls 95 are pressed on the steering mechanism shell 92 by the springs. Further, the steering body 91 and the steering housing 92 are provided with positioning pin mounting holes 94, so that when the positioning pins are inserted, the steering body 91 and the steering housing 92 form a rigid whole body without relative rotation.

As shown in fig. 2 and 3, the upper part of the end of the secondary bracket arm 4 is provided with a hinge seat 41, and the crossbar embracing tire assembly 5 is connected through the hinge seat 41. The tire embracing frame 52 is connected to the arm tire embracing assembly 5 through a swing shaft 51, and the tire embracing frame 52 can rotate relative to the arm tire embracing assembly 5. The tire embracing frame 52 is provided with a tire embracing device, and the detailed structure of the tire embracing device is not described in detail in this embodiment.

Fig. 4 shows the folded position of the folding bracket arm structure. As shown in fig. 4, the upper cover of the primary bracket 3 is at least partially open, and for example, the upper cover may not be provided, so that when the secondary bracket 4 is completely retracted into the primary bracket 3, the hinge base 41 provided at the upper end of the secondary bracket 4 is also retracted into the primary bracket 3. Because the size of the end part of the cross arm tire embracing assembly 5 is larger than that of the tail end of the first-level bracket arm 3, particularly the size in the transverse direction is larger, the cross arm tire embracing assembly 5 automatically turns upwards and folds under the limiting action of a side plate at the tail end of the first-level bracket arm 3. When the second-stage bracket arm 4 extends out, the cross arm tire embracing assembly 5 turns downwards under the action of gravity to complete the opening action.

Fig. 5 shows a schematic view of the folding bracket structure in a stowed state. The rear part of the wrecker is provided with a carriage 8, the carriage 8 is provided with an upturning type rear cover plate 81, the rear cover plate 81 is firstly upturned when the supporting arm structure is folded and stored, then a second-level supporting arm 4 is completely retracted into a first-level supporting arm 3, upturning and folding of the cross arm tire-embracing assembly 5 are completed simultaneously, then the supporting arm lifting oil cylinder 7 is controlled, the supporting arm assembly 2 is upturned to the maximum stroke, the whole folding supporting arm structure is stored in the carriage 8, and then the rear cover plate 81 is closed to complete storage.

When the foldable type trailing arm structure is needed to be used for obstacle clearing operation, the foldable type trailing arm structure is turned downwards to a working position by controlling the trailing arm lifting oil cylinder 7, then the second-stage trailing arm 4 extends out of the first-stage trailing arm 3, the folded cross arm tire embracing assembly 5 completes opening action under the action of gravity, and after the tire embracing device completes fixing of a front wheel of a fault vehicle, the trailing arm lifting oil cylinder 7 is controlled to lift the trailing arm mechanism upwards, so that the front wheel of the vehicle is separated from the ground, and traction operation of the fault vehicle is completed, as shown in fig. 6.

Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terms used herein were chosen in order to best explain the principles of the embodiments, the practical application, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A folding type trailing arm structure is characterized by comprising a trailing arm hanger, a trailing arm assembly, a primary trailing arm, a secondary trailing arm and a cross arm tire-holding assembly;

the supporting arm hanging bracket is arranged on a chassis girder of the vehicle, the supporting arm assembly is hinged on the supporting arm hanging bracket, the supporting arm assembly is connected with a supporting arm lifting device, and the supporting arm assembly can rotate around a hinge point under the driving of the supporting arm lifting device;

the first-stage supporting arm is connected to the supporting arm assembly, the inside of the first-stage supporting arm is connected with the second-stage supporting arm through a supporting arm telescopic mechanism, the upper part of the tail end of the second-stage supporting arm is provided with a hinged seat, and the hinged seat is connected with a transverse arm tire-holding assembly;

the upper cover plate of the first-level supporting arm is at least partially opened, so that the hinged seat is accommodated when the second-level supporting arm is in a contraction state, the size of the end part of the cross arm embracing tire assembly is larger than that of the tail end of the first-level supporting arm, and therefore when the second-level supporting arm retracts into the first-level supporting arm, the cross arm embracing tire assembly overturns upwards under the limiting effect of the tail end of the first-level supporting arm, and the folding action is automatically completed.

2. The folding type trailing arm structure of claim 1, wherein the trailing arm lifting device is a trailing arm lifting cylinder, one end of the trailing arm lifting cylinder is connected to a chassis frame of the vehicle, and the other end of the trailing arm lifting cylinder is connected to the trailing arm assembly.

3. The folding bracket arm structure of claim 1, wherein said bracket arm assembly is fixedly connected to said primary bracket arm.

4. The foldable trailing arm structure of claim 1, wherein the trailing arm assembly and the primary trailing arm are movably connected by a steel ball steering mechanism;

the steel ball steering mechanism comprises a steering mechanism body, a steering mechanism shell and a central shaft, wherein the steering mechanism shell is sleeved on the steering mechanism body, the steering mechanism body and the steering mechanism shell are hinged through the central shaft, a plurality of spring containing cavities are formed in the steering mechanism body, springs are installed in the spring containing cavities, positioning steel balls are arranged at the tail ends of the springs, and the positioning steel balls are jacked on the steering mechanism shell by the springs.

5. The folding bracket arm structure of claim 4, characterized in that the steering mechanism body and the steering mechanism shell are provided with positioning pin mounting holes.

6. The folding type supporting arm structure as claimed in claim 1, wherein the supporting arm extension mechanism is selected from any one of a hydraulic oil cylinder, a hydraulic motor or a stepping motor.

7. The foldable trailing arm structure of claim 1, wherein the tire holding assembly of the cross arm is connected with a tire holding frame, and the tire holding frame is provided with a tire holding device.

8. The foldable bracket arm structure of claim 7, wherein the tire embracing frame is connected to the cross arm tire embracing assembly through a swinging shaft.

9. An obstacle clearance vehicle characterized in that a folding trailing arm structure according to any one of claims 1 to 8 is mounted on a chassis girder of the obstacle clearance vehicle.

10. A obstacle clearing vehicle as claimed in claim 9, wherein the rear of the vehicle is provided with a receiving cavity which can provide a receiving space for the collapsible trailing arm structure in the event that it is lifted to maximum travel.