Connecting structure of chassis axle and frame and crane thereof

Abstract

The invention discloses a connecting structure of a chassis axle and a frame, which is characterized in that a thrust rod of the axle is moved to the middle position of an axle housing, a thrust rod support is lifted, a hole is formed in the middle position of a lower bottom plate of the frame to avoid the thrust rod support, and the thrust rod on the axle is arranged in the frame; and an axle upper thrust rod support corresponding to the axle upper thrust rod is arranged in the frame. By changing the layout structure form of the axle and the frame, the box size of the frame is increased, the height of the whole machine is not increased, and the bearing bending resistance of the frame is improved by 40%.

Description

Technical Field

[0001] The invention relates to the field of cranes, and in particular to a connecting structure of a chassis axle and a frame and a crane thereof. Background Art

[0002] As the tonnage of cranes is getting larger, the box-shaped dimensions of chassis and upper structural parts are also designed to be larger to meet the load-bearing requirements. Since all-terrain cranes are road vehicles, road vehicles must meet the regulatory requirements for the height of the entire machine. There is a contradiction between the height limit of the entire machine and the demand for the height of the structural parts due to the increase in the tonnage of the crane. The frame is the main load-bearing structural part of the chassis, and its design is mainly a box-shaped structure. There are two main methods to improve the load-bearing capacity of the box-shaped structure: one method is to increase the thickness of the box-shaped structural parts without changing the box-shaped dimensions to improve its load-bearing performance. The advantage is that the box-shaped dimensions of the structural parts remain unchanged and meet the design requirements of the entire machine. The disadvantage is that the weight is heavy, and super-large tonnage cranes cannot meet the design requirements. Another method is to increase the box-shaped dimensions of the frame to improve its load-bearing performance. This method can meet the strength design requirements of super-large tonnage frames, but the increase in size affects the overall layout of the chassis and the height of the entire machine.

[0003] Existing technologies include "wheel suspension for mobile crane and crane" (patent number CN201610085049.0). In terms of the layout of the axle and frame of the all-terrain chassis, the axle is compactly designed, and the frame thrust rod support is designed as an integrated type with good processability.

[0004] However, the connection between the axle and the frame is on the outside of the frame, and the box-section size of the frame cannot be increased. If the box-section height of the frame body is increased, it can be achieved by raising the height of the upper cover or lowering the height of the lower floor. Due to road regulations and the height limit of the whole machine, the height of the upper cover is limited, so the size of the frame body can only be increased by lowering the height of the lower floor.

[0005] The axle of the all-terrain crane chassis will jump up and down during driving. In order to avoid interference during the design process, the distance dimension A between the highest point of the axle and the bottom plate of the frame is constant. If the box height of the bottom plate of the frame is reduced, the bottom plate of the frame will interfere with the thrust rod on the axle. Therefore, the existing structural arrangement of the axle and the frame cannot increase the frame box type, which limits the increase in the load-bearing capacity of the chassis structure.

[0006] Therefore, it is necessary to optimize the existing connection structure between the chassis axle and the frame in a targeted manner, and increase the size of the chassis frame box without increasing the height of the entire machine. Summary of the invention

[0007] Purpose of the invention: In view of the shortcomings and defects of the prior art, the present invention provides a connection structure between a chassis axle and a frame and a crane thereof, which can increase the size of the frame box without increasing the height of the whole machine by changing the layout structure of the axle and the frame, and improve the bearing and bending resistance of the frame by 40%.

[0008] Technical solution: A connection structure between a chassis axle and a frame of the present invention is characterized in that: the thrust rod of the axle is moved to the middle position of the axle housing, the thrust rod support is raised, a hole is opened in the middle position of the lower bottom plate of the frame to avoid the thrust rod support, the axle thrust rod is placed in the frame, and an axle thrust rod support corresponding to the axle thrust rod is provided in the frame.

[0009] The highest point of the axle is changed from the thrust rod to the upper plane of the axle housing, and the lower floor of the frame can be increased downwards into a box shape while ensuring the distance A value between the lower floor of the frame and the car.

[0010] Among them, the thrust rod support on the axle is welded to the axle housing, the thrust rod support on the axle is connected to the thrust rod on the axle by bolts, and the thrust rod on the axle is connected to the thrust rod support in the frame by bolts; the thrust rod support on the axle is installed into the frame through the opening of the lower bottom plate of the frame body.

[0011] The lower axle thrust rod corresponding to the upper axle thrust rod is respectively connected to the lower axle thrust rod support and the outer frame thrust rod support through bolts, and the lower axle thrust rod support is welded to the axle housing.

[0012] Wherein, the thrust rod on the axle adopts an outward-to-outer-eight arrangement.

[0013] Wherein, the frame is provided with a frame upper cover plate.

[0014] Wherein, the axle is provided with a suspension cylinder.

[0015] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: Compared with the original structural form, the present invention increases the size of the frame box by changing the layout structure of the axle and the frame without increasing the height of the whole machine. Under the same conditions, the load-bearing capacity of the frame can be increased by about 40%, and the height of the whole machine of the super-large tonnage all-terrain crane is reduced, so that the driving passability of the whole machine is improved. Under the same load conditions, the weight of the rear frame of the present invention can be reduced by more than 10%, the weight of the whole machine is reduced, and the fuel economy and cost of the all-terrain crane can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the connection structure between the chassis axle and the frame in the prior art;

[0017] Figure 2 for Figure 1 A partial enlarged view of middle I;

[0018] Figure 3 It is a schematic diagram of the connection structure between the chassis axle and the frame of the present invention;

[0019] Figure 4 for Figure 3 A partial enlarged view of middle I;

[0020] Figure 5 It is a three-dimensional schematic diagram of the connection structure between the chassis axle and the frame of the present invention;

[0021] Figure 6 It is a structural schematic diagram of the axle of the present invention;

[0022] Figure 7 The structure of the frame of the present invention is schematically shown in FIG. Figure 1 ;

[0023] Figure 8 The structure of the frame of the present invention is schematically shown in FIG. Figure 2 ;

[0024] In the figure, 1 is the upper cover plate of the frame; 2 is the main body of the frame; 3 is the lower bottom plate of the frame; 4 is the thrust rod on the axle; 5 is the axle housing; 6 is the thrust rod support on the axle; 7 is the thrust rod support inside the frame; 8 is the thrust rod support outside the frame; 9 is the thrust rod under the axle; 10 is the thrust rod support under the axle; and 11 is the suspension cylinder. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0026] The all-terrain crane of the present invention is a high-performance product that combines the characteristics of an automobile crane and an off-road crane. Axle: a mechanism that transmits the forces and moments in all directions between the frame and the wheels, and transmits the driving force. Frame: a structural component of the crane, which is the mounting carrier of various assembly devices such as the power system and the travel system, and also plays a supporting and force-bearing role when the crane is in operation. Chassis: a structural component of the crane, which is the mounting carrier of various assembly devices such as the power system and the travel system, and also plays a supporting and force-bearing role when the crane is in operation.

[0027] The present invention moves the axle thrust rod to the middle position of the axle housing 5, raises the axle thrust rod support, opens a hole in the middle position of the frame lower bottom plate 3 to avoid the axle thrust rod support, arranges the axle upper thrust rod 4 in the frame, and designs the axle upper thrust rod support 6 inside the frame. After the axle upper thrust rod 4 is moved to the middle of the axle, it avoids the interference of the frame lower bottom plate 3, and the frame lower bottom plate 3 can be designed downward, thereby increasing the frame box type and improving the load-bearing capacity of the frame.

[0028] Figure 1 and Figure 2 It is a schematic diagram of the connection structure between the chassis axle and the frame in the prior art; Figure 3 and Figure 4 The figure is a schematic diagram of the connection structure between the chassis axle and the frame of the present invention. The present invention moves the thrust rod support 6 on the axle to the middle position of the axle housing 5 and heightens it inside the frame. As a result, the highest point of the axle is changed from the original thrust rod to the upper plane of the axle housing 5, ensuring the connection with the chassis axle. Figure 2 Under the condition of the same distance A between the lower floor plate 3 of the frame and the axle, the lower floor plate 3 of the frame can increase the box shape downward. The increase of the box shape can increase the load-bearing capacity of the frame body by about 40%.

[0029] like Figure 5 The frame cover 1 is hidden in the figure, the axle upper thrust rod support 6 is welded to the axle housing 5, the axle upper thrust rod support 6 is connected to the axle upper thrust rod 4 by bolts, the axle upper thrust rod 4 is connected to the frame inner thrust rod support 7 by bolts, similarly, the axle lower thrust rod 9 is respectively connected to the axle lower thrust rod support 10 and the frame outer thrust rod support 8 by bolts, and the axle lower thrust rod support 10 is welded to the axle housing 5. The axle upper thrust rod support 6 is installed into the frame through the opening at the lower bottom plate of the frame body 2.

[0030] like Figure 6 The main difference of the axle of the present invention compared with the prior art is that the axle upper thrust rod support 6 is welded to the axle housing 5 by welding. The axle upper thrust rod support 6 is raised and arranged on the axle housing 5, the axle upper thrust rod 4 adopts an outer eight arrangement, and the axle lower thrust rod support 10 is consistent with the original axle arrangement.

[0031] The structure of the axle frame matching the new structure is as follows Figure 7 and Figure 8 As shown, the original integrated frame thrust rod support is designed to be divided into two parts, one part is the frame inner thrust rod support 7 inside the frame, and the other part is the frame outer thrust rod support 8 outside the frame, and the two parts are welded to the frame body 2 by welding. Figure 6 The thrust rod support 6 on the axle can be installed in the frame, and the bottom plate 3 under the frame has a large hole to avoid it.

[0032] The frame thrust rod support of the present invention is designed as an inner and outer split type, and has a structural design of a large opening at the bottom of the frame.

[0033] Compared with the original structure, the present invention increases the size of the frame box by changing the layout structure of the axle and the frame without increasing the height of the whole machine. Under the same conditions, the load-bearing capacity of the frame can be increased by about 40%, and the height of the whole machine of the super-large tonnage all-terrain crane can be reduced, so that the driving passability of the whole machine is improved. Under the same load conditions, the weight of the rear frame of the present invention can be reduced by more than 10%, the weight of the whole machine is reduced, and the fuel economy and cost of the all-terrain crane can be reduced.

Claims

1. A connection structure between a chassis axle and a frame, characterized in that: The thrust rod of the vehicle axle is moved to the middle position of the vehicle axle housing (5), the thrust rod support is raised, a hole is opened in the middle position of the vehicle frame lower bottom plate (3) to avoid the thrust rod support, the vehicle axle upper thrust rod (4) is placed in the vehicle frame, and the vehicle frame is provided with a vehicle axle upper thrust rod support (6) corresponding to the vehicle axle upper thrust rod (4).

2. The connection structure between the chassis axle and the frame according to claim 1, characterized in that: The highest point of the axle is changed from the thrust rod to the upper plane of the axle housing (5), and the lower bottom plate (3) of the frame can be increased downwards into a box shape while ensuring the distance A value between the lower bottom plate (3) of the frame and the car.

3. The connection structure between the chassis axle and the frame according to claim 1, characterized in that: The axle upper thrust rod support (6) is welded to the axle housing (5), the axle upper thrust rod support (6) is connected to the axle upper thrust rod (4) by bolts, and the axle upper thrust rod (4) is connected to the frame inner thrust rod support (7) by bolts; the axle upper thrust rod support (6) is inserted into the frame through an opening of a frame lower bottom plate (3) of a frame body (2).

4. The connection structure between the chassis axle and the frame according to claim 3, characterized in that: The lower axle thrust rod (9) corresponding to the upper axle thrust rod (4) is respectively connected to the lower axle thrust rod support (10) and the outer frame thrust rod support (8) through bolts, and the lower axle thrust rod support (10) is welded to the axle housing (5).

5. The connection structure between a chassis axle and a vehicle frame according to claim 1, characterized in that: The thrust rod (4) on the axle is arranged in an outward-facing manner.

6. The connection structure between a chassis axle and a vehicle frame according to claim 1, characterized in that: The vehicle frame is provided with a vehicle frame upper cover plate (1).

7. The connection structure between a chassis axle and a vehicle frame according to claim 1, characterized in that: The vehicle axle is provided with a suspension oil cylinder (11).

8. A crane using the connection structure between a chassis axle and a frame according to any one of claims 1 to 7.

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