Composite telescopic vehicle-mounted connecting mechanism

Abstract

The application discloses a composite telescopic vehicle-mounted connecting mechanism, which comprises a main supporting arm, a first telescopic arm and a second telescopic arm. The main supporting arm is a frame structure with a cross section in the shape of a cross, comprising a horizontal supporting arm and a vertical supporting arm. The horizontal supporting arm and the vertical supporting arm are both hollow square tubes. The first telescopic arm is a frame structure with a cross section in the shape of an E, comprising a horizontal fixed arm, left and right vertical arms symmetrically arranged at two ends of the horizontal fixed arm, and a central vertical arm arranged at the center of the horizontal fixed arm. The second telescopic arm comprises two left and right telescopic arms respectively sleeved on the left and right vertical arms. The connecting mechanism adopts a plurality of coupling mechanisms, such as a multi-direction linkage telescopic connection, a whole and a mobile platform hinged connection, and a work follow-up supporting structure. Through accurate driving control, the connecting mechanism can drive an end work device to realize small and compact transportation, multi-direction long-distance linear motion work, and stable follow-up work.

Description

TECHNICAL FIELD

[0001] The present application relates to a connecting mechanism, in particular to a composite telescopic vehicle-mounted connecting mechanism. BACKGROUND

[0002] The vehicle-mounted connecting mechanism is a movement mechanism for realizing the quick conversion of the vehicle-mounted working device between the transportation state and the working state. Different vehicle-mounted connecting mechanisms have different movement forms and different space movement trajectories. A typical connecting mechanism, such as a multi-joint excavating working arm, is mainly connected in a hinged manner between adjacent joints, and the conversion between different states is realized through multi-joint linkage. This multi-degree-of-freedom movement mode forms various movement trajectories and is suitable for the working device with low requirements for the posture control accuracy during the movement. However, for the working device with high requirements for the trajectory accuracy during the working process and requiring long-distance linear movement, the connecting mechanism cannot meet the working requirements. For example, the crane working arm adopts a multi-sleeve telescopic mode, and the length between adjacent telescopic arms is adjusted by controlling the extension amount of the oil cylinder to realize the linear movement in a single direction. However, for the working device requiring small-size compact transportation, multi-directional long-distance linear movement, and low-speed follow-up stable working, the above connecting mechanism cannot meet the working requirements. SUMMARY

[0003] The present application aims to provide a composite telescopic vehicle-mounted connecting mechanism.

[0004] The present application has the following innovative points: a plurality of coupling mechanisms, such as multi-directional linkage telescopic connection, overall and mobile platform hinged connection, and working follow-up support structure, are adopted to realize the small-size compact transportation of the connecting mechanism with the end working device, multi-directional long-distance linear movement working, and low-speed follow-up stable working through accurate driving control.

[0005] In order to achieve the above-mentioned application purposes, the technical solution of the present application is as follows:

[0006] A composite telescopic vehicle-mounted connecting mechanism comprises a main support arm, a first telescopic arm, and a second telescopic arm. The main support arm is a frame structure with a cross-section in the shape of a cross, comprising a horizontal support arm and a vertical support arm. Both the horizontal support arm and the vertical support arm are hollow square tubes. The upper end of the vertical support arm is provided with a main connecting pin, and the lower end is hingedly connected to the tail of a mobile platform. The two ends of the horizontal support arm are provided with connecting seats, which are connected to the telescopic ends of a steering oil cylinder. The fixed end of the steering oil cylinder is connected to the mobile platform.

[0007] The primary telescopic arm is a frame structure with a cross-section in the shape of an "E" character, comprising a horizontal fixed arm, left and right vertical arms symmetrically arranged at both ends of the horizontal fixed arm, and a central vertical arm arranged at the center of the horizontal fixed arm; the left, right and central vertical arms are parallel and are all hollow square tubes; the central vertical arm is sleeved in the inner cavity of the vertical support arm, a primary telescopic oil cylinder is arranged in the inner cavity of the central vertical arm, the fixed end of the primary telescopic oil cylinder is connected with a first connecting pin at the lower end of the central vertical arm, and the telescopic end of the primary telescopic oil cylinder is connected with a main connecting pin at the upper end of the vertical support arm; a secondary telescopic oil cylinder is arranged in the inner cavity of each of the left and right vertical arms, and the fixed end of the secondary telescopic oil cylinder is connected with a second connecting pin at the lower end of the left and right vertical arms respectively.

[0008] The secondary telescopic arm comprises two left and right telescopic arms respectively sleeved on the left and right vertical arms; the left and right telescopic arms are both hollow square tubes, and the upper ends of the left and right telescopic arms are both provided with auxiliary connecting pins connected with the telescopic ends of the secondary telescopic oil cylinders.

[0009] Further, the lower ends of the left and right telescopic arms are further provided with fixed seats, the two ends of the fixed seat are provided with connecting ears, and the center is provided with a connecting shaft sleeve.

[0010] Further, the lower ends of the vertical support arm, the left telescopic arm and the right telescopic arm are all provided with wear-resistant sliding blocks.

[0011] Further, the two ends of the horizontal fixed arm are further provided with guide support wheels.

[0012] The beneficial effects of the present application are:

[0013] Firstly, the structure is compact, and through overturning, folding and adjusting telescopic, small volume, intensive transportation and transportation gravity center control can be realized, and the maneuvering safety and stability are good;

[0014] Secondly, the mechanism is easy to realize vertical precise control, so that the mechanism can move linearly in the vertical direction, and effective linear motion power is provided for vertical downward operation, and the vertical operation effect is good;

[0015] Thirdly, the two-stage telescopic arm coupling connection structure can realize linkage control of the connecting mechanism in the vertical direction, and effectively increases the operation range of the terminal operation device;

[0016] Fourthly, the guide support wheel is adopted, the terrain adaptability is strong, and the telescopic oil cylinder can float up and down with the undulating ground, so that accurate control of operation depth, follow-up stable support of the connecting mechanism in the maneuvering operation process and stable support of fixed-point operation can be effectively realized, and the operation stability is good;

[0017] Five, the connecting mechanism cooperates with the mobile platform, and different operation forms such as fixed-point vertical operation, fixed-point slope vertical operation, equal-height horizontal straight operation, variable-height horizontal operation can be realized, and diversified operation task requirements can be met. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of the application.

[0019] Figure 2 It is a schematic view of the vehicle transportation state of the application.

[0020] Figure 3 It is a schematic view of the fixed-point operation in the vertical state of the vehicle of the application.

[0021] Figure 4 It is a schematic view of the follow-up operation in the vertical state of the vehicle of the application.

[0022] Figure 5 It is a schematic view of the variable-height follow-up operation in the vertical state of the vehicle of the application.

[0023] In the figure: 10 is a main support arm, 11 is a horizontal support arm, 12 is a vertical support arm, 13 is a main connecting pin, 14 is a connecting seat, 15 is a steering oil cylinder, 20 is a first telescopic arm, 21 is a horizontal fixed arm, 22 is a left vertical arm, 23 is a right vertical arm, 24 is a central vertical arm, 25 is a first telescopic oil cylinder, 26 is a second telescopic oil cylinder, 27 is a guide support wheel, 28 is a first connecting pin, 29 is a second connecting pin, 30 is a second telescopic arm, 31 is a left telescopic arm, 32 is a right telescopic arm, 33 is an auxiliary connecting pin, 34 is a fixed seat, 35 is a connecting lug, 36 is a connecting shaft sleeve, and 40 is a wear-resistant sliding block. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings.

[0025] A composite telescopic vehicle-mounted connecting mechanism comprises a main support arm 10, a first telescopic arm 20 and a second telescopic arm 30; the main support arm 10 is a frame structure with a cross section in the shape of a cross, comprising a horizontal support arm 11 and a vertical support arm 12, and the horizontal support arm 11 and the vertical support arm 12 are both hollow square tubes; a main connecting pin 13 is arranged at the upper end of the vertical support arm 12, and the lower end is hingedly connected to the tail of a mobile platform; connecting seats 14 are arranged at both ends of the horizontal support arm 11, the connecting seats 14 are connected to the telescopic ends of a steering oil cylinder 15, and the fixed end of the steering oil cylinder 15 is connected to the mobile platform;

[0026] The primary telescopic arm 20 is a frame structure with a cross-section of "E" shape, including a horizontal fixed arm 21, a left vertical arm 22 and a right vertical arm 23 symmetrically arranged at both ends of the horizontal fixed arm 21, and a central vertical arm 24 arranged at the center of the horizontal fixed arm 21; the left vertical arm 22, the right vertical arm 23 and the central vertical arm 24 are parallel and are all hollow square tubes; the central vertical arm 24 is sleeved in the inner cavity of the vertical support arm 12, a primary telescopic oil cylinder 25 is arranged in the inner cavity of the central vertical arm 24, the fixed end of the primary telescopic oil cylinder 25 is connected with a first connecting pin 28 at the lower end of the central vertical arm 24, and the telescopic end of the primary telescopic oil cylinder 25 is connected with the main connecting pin 13 at the upper end of the vertical support arm 12; a secondary telescopic oil cylinder 26 is arranged in the inner cavity of each of the left vertical arm 22 and the right vertical arm 23, and the fixed end of the secondary telescopic oil cylinder 26 is connected with a second connecting pin 29 at the lower end of each of the left vertical arm 22 and the right vertical arm 23.

[0027] The secondary telescopic arm 30 includes a left telescopic arm 31 and a right telescopic arm 32, which are respectively sleeved on the left vertical arm 22 and the right vertical arm 23; the left telescopic arm 31 and the right telescopic arm 32 are both hollow square tubes, an auxiliary connecting pin 33 is arranged at the upper end of each of the left telescopic arm 31 and the right telescopic arm 32, and the auxiliary connecting pin 33 is connected with the telescopic end of the secondary telescopic oil cylinder 26; a fixed seat 34 is arranged at the center of the secondary telescopic arm 30, connecting ears 35 are arranged at both ends of the fixed seat 34, and a connecting shaft sleeve 36 is arranged at the center of the fixed seat 34.

[0028] Further, a fixed seat 34 is further arranged at the lower end of each of the left telescopic arm 31 and the right telescopic arm 32, connecting ears 35 are arranged at both ends of the fixed seat 34, and a connecting shaft sleeve 36 is arranged at the center of the fixed seat 34; the operating device is connected with the connecting mechanism through the connecting shaft sleeve 36, and is connected with the connecting ears 35 on the connecting mechanism through the oil cylinder, and of course, the operating device can also be connected with the connecting mechanism through other existing mounting modes, which is prior art and will not be described here.

[0029] Further, wear-resistant sliding blocks 40 are arranged on the inner walls of the lower ends of the vertical support arm 12, the left telescopic arm 31 and the right telescopic arm 32; the wear-resistant sliding blocks 40 can effectively ensure the linear motion effect of the telescopic arms, effectively reduce the motion resistance of the telescopic arms, and effectively avoid surface wear of the telescopic arms due to long-time motion.

[0030] Further, guide support wheels 27 are further arranged at both ends of the horizontal fixed arm 21.

[0031] Working principle of the connecting mechanism:

[0032] I. Transport state control. For example, Figure 2As shown, adjust the first-stage telescopic cylinder 25 to shorten to its minimum size, control the horizontal fixed arm 21 of the first-stage telescopic arm 20 to fit with the main support arm 10, adjust the second-stage telescopic cylinder 26 to extend to its maximum size, control the second-stage telescopic arm 30 to reach the farthest distance between the first-stage telescopic arm 20; adjust the steering cylinder 15 to shorten to its minimum size, and flip the main support arm 10 to fit close to the moving platform.

[0033] II. Vertical deployment and fixed-point operation control. For example... Figure 3 As shown, in vertical deployment: After the mobile platform moves to the designated position, control the steering cylinder 15 to adjust the main support arm 10 to a vertical position. Fixed-point operation control mode one: Control the secondary telescopic cylinder 26 to slowly retract, causing the secondary telescopic arm 30 to slowly move downwards in a straight line along the primary telescopic arm 20. Figure 3 (The direction of movement indicated by V2 in the middle) until the secondary telescopic cylinder 26 retracts to its shortest state, controlling the primary telescopic cylinder 25 to slowly extend, so that the primary telescopic arm 20 slowly moves downward in a straight line along the main support arm 10 ( Figure 3 (The direction of movement indicated by V1) until the first-stage telescopic cylinder 25 extends to its longest position. Fixed-point operation control method two: Control the first-stage telescopic cylinder 25 to extend slowly, causing the first-stage telescopic arm 20 to move slowly downwards in a straight line along the main support arm 10 (…). Figure 3 (The direction of movement indicated by V1 in the middle) until the bottom guide support wheel 27 of the first-stage telescopic boom 20 contacts the ground, control the second-stage telescopic cylinder 26 to slowly retract, so that the second-stage telescopic boom 30 slowly moves downward in a straight line along the first-stage telescopic boom 20 ( Figure 3 (The movement direction marked by V2) until the secondary telescopic cylinder 26 retracts to its shortest state. In the second fixed-point operation control mode, the guide support wheel 27 can provide stable support for fixed-point operation.

[0034] III. Vertical deployment and mobile operation follow-up control. For example... Figure 4 As shown, after the mobile platform moves to the designated position, the steering cylinder 15 is controlled to adjust the main support arm 10 to a vertical position. The first-stage telescopic cylinder 25 is controlled to slowly extend until the bottom guide support wheel 27 of the first-stage telescopic arm 20 contacts the ground. The length of the second-stage telescopic cylinder 26 is controlled so that the second-stage telescopic arm 30 moves along the first-stage telescopic arm 20 to a suitable position. The mobile platform moves slowly, and this connecting mechanism moves slowly with the mobile platform under the support of the guide support wheel 27.

[0035] IV. Vertical deployment and variable-height maneuvering operation follow-up control. For example... Figure 5As shown, after the mobile platform is moved to the designated position, the control turning oil cylinder 15 is controlled to adjust the main support arm 10 to the vertical state, the primary telescopic oil cylinder 25 is controlled to slowly extend until the bottom guiding support wheel 27 of the primary telescopic arm 20 is in contact with the ground, the secondary telescopic oil cylinder 26 is controlled to change the length to make the secondary telescopic arm 30 move up and down along the primary telescopic arm 20 Figure 5 V3, V4 identify the moving direction), and at the same time, the mobile platform is controlled to slowly move, and the connecting mechanism slowly moves with the mobile platform under the support of the guiding support wheel 27.

[0036] The described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

Claims

1. A composite telescoping vehicle-mounted connection mechanism, characterized by: It includes a main support arm (10), a first-stage telescopic arm (20), and a second-stage telescopic arm (30); the main support arm (10) is a frame structure with a cross-section in the shape of a cross, including a horizontal support arm (11) and a vertical support arm (12), both of which are hollow square tubes; the upper end of the vertical support arm (12) is provided with a main connecting pin (13), and the lower end is hinged to the tail of the mobile platform; the two ends of the horizontal support arm (11) are provided with connecting seats (14), the connecting seats (14) are connected to the telescopic end of the steering cylinder (15), and the fixed end of the steering cylinder (15) is connected to the mobile platform; The first-stage telescopic arm (20) is an "E"-shaped frame structure, including a horizontal fixed arm (21), a left vertical arm (22) and a right vertical arm (23) symmetrically arranged at both ends of the horizontal fixed arm (21), and a central vertical arm (24) arranged at the center of the horizontal fixed arm (21); the left vertical arm (22), the right vertical arm (23) and the central vertical arm (24) are parallel and are all hollow square tubes; the central vertical arm (24) is sleeved in the inner cavity of the vertical support arm (12), and the inner cavity of the central vertical arm (24) is... A primary telescopic cylinder (25) is installed in the cavity. The fixed end of the primary telescopic cylinder (25) is connected to the first connecting pin (28) at the lower end of the central vertical arm (24), and the telescopic end of the primary telescopic cylinder (25) is connected to the main connecting pin (13) at the upper end of the vertical support arm (12). Secondary telescopic cylinders (26) are installed in the cavities of the left and right vertical arms (22, 23). The fixed ends of the secondary telescopic cylinders (26) are connected to the second connecting pins (29) at the lower ends of the left vertical arm (22) and the right vertical arm (23), respectively. The secondary telescopic arm (30) includes two telescopic arms, a left telescopic arm (31) and a right telescopic arm (32), respectively sleeved on the left vertical arm (22) and the right vertical arm (23); the left telescopic arm (31) and the right telescopic arm (32) are both hollow square tubes, and the upper ends of the left and right telescopic arms (31, 32) are provided with auxiliary connecting pins (33), which are connected to the telescopic end of the secondary telescopic cylinder (26); the lower ends of the left and right telescopic arms (31, 32) are also provided with fixed seats (34), the fixed seats (34) are provided with connecting ears (35) at both ends and a connecting bushing (36) at the center; the horizontal fixed arm (21) is also provided with guide support wheels (27) at both ends.

2. The composite retractable vehicle-mounted connection mechanism according to claim 1, characterized in that: Wear-resistant sliders (50) are provided on the inner walls of the lower ends of the vertical support arm (12), the left telescopic arm (31) and the right telescopic arm (32).

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