CN102424036A - Telescopic supporting leg device and engineering machinery - Google Patents

Abstract

The present invention discloses a telescopic leg device for engineering machinery, comprising a fixed leg and a movable leg connected to the fixed leg via a horizontal expansion cylinder, a support cylinder (3) is arranged at the end of the movable leg (11), a telescopic rod of the expansion cylinder (2) has a fluid channel, a rodless cavity of the support cylinder (3) is connected to an external fluid pipeline of the fixed leg via the rodless cavity of the expansion cylinder (2) and the fluid channel (211), and an elastic element that can be telescoped in a vertical direction is arranged in the support cylinder (3), one end of the elastic element is connected to the top wall or the bottom wall of the support cylinder (3), and the other end is connected to the support rod (32) of the support cylinder (3); the arrangement of the working pipeline of the support cylinder in the telescopic leg device is relatively simple, and the installation and maintenance are relatively convenient, and the arrangement method avoids friction damage between the working pipeline of the support cylinder and the leg when the leg is telescoped, thereby increasing the reliability of the support cylinder. In addition, the present invention also discloses an engineering machinery including the telescopic leg device.

Description

A telescopic outrigger device and construction machinery

technical field

The invention relates to the technical field of engineering machinery, in particular to a telescopic outrigger device of an engineering machinery. In addition, the present invention also relates to a construction machine comprising the above telescopic outrigger device.

Background technique

Large-scale construction machinery such as port tire cranes and concrete pump trucks are widely used in ports, mines, high-rise buildings, and national defense engineering fields. In order to meet the needs of safe and stable operations, telescopic outriggers are generally installed around the frame.

Please refer to FIG. 1 , which is a schematic structural diagram of a typical telescopic outrigger device in the prior art.

The telescopic outrigger 1' includes a fixed leg connected to the vehicle frame. The fixed leg is generally a box structure with movable legs nested inside. A telescopic oil cylinder is arranged between the fixed leg and the movable leg. One end of the telescopic oil cylinder is connected The other end of the leg is connected to the movable leg, and the movable leg can be stretched relative to the fixed leg; the end of the movable leg is also provided with a supporting oil cylinder 2'.

When the construction machinery is in the working state, the movable legs are stretched out under the action of the telescopic oil cylinder. When stretched to a certain position, the support cylinder 2' is extended under the action of the hydraulic oil circuit, and the support rod of the support cylinder is firmly supported. on the ground, so that the tires of the construction machinery are separated from the ground, and the stability of the construction machinery operation is increased; when the operation of the construction machinery is completed, the support rod supporting the oil cylinder 2' is retracted, and the tires fall back to the ground again.

In the prior art, the hydraulic oil used to control the work of the support cylinder is connected to the hydraulic oil source and the oil port of the support cylinder through oil pipes, and the oil pipes are arranged inside the telescopic legs. The oil pipe 3' is arranged inside the telescopic outrigger, and needs to move relative to the fixed outrigger as the telescopic outrigger expands and contracts. The oil pipe is relatively easy to wear. In order to reduce the wear of the oil pipe 3', the drag chain is generally wound outside the oil pipe 3'.

However, the internal space of the outrigger is relatively small, and the installation and maintenance of the towline is more troublesome, and the work of the towline requires enough space, so the internal structure of the telescopic outrigger 1' must have a relatively large space, and even the interior must be empty and cannot be reinforced. The board is used to increase the strength of the outrigger and affect the use strength of the outrigger.

Moreover, the oil pipe 3' inside the telescopic support leg 1' is not only difficult to assemble, but also inconvenient to replace.

Therefore, how to provide a telescopic outrigger device, the oil pipe inside the telescopic outrigger device is easy to install and easy to maintain, and the outrigger has a compact structure and relatively high service strength is an urgent problem to be solved by those skilled in the art.

Contents of the invention

The object of the present invention is to provide a telescopic outrigger device, which has a simple internal oil pipe arrangement and is easy to install and maintain. Another object of the present invention is to provide a construction machine comprising the above telescopic outrigger device.

In order to solve the above-mentioned technical problems, the present invention provides a telescopic outrigger device for engineering machinery, which includes a fixed leg and a movable leg connected to the fixed leg through a horizontal expansion cylinder, and a support cylinder is provided at the end of the movable leg. The telescopic rod of the deployment cylinder has a fluid channel, and the rodless cavity of the support cylinder communicates with the external fluid pipeline of the fixed leg through the rodless cavity of the deployment cylinder and the fluid channel, and the support cylinder is provided with An elastic element that expands and contracts in the vertical direction, one end of the elastic element is connected to the top wall or bottom wall of the support cylinder, and the other end is connected to the support rod of the support cylinder.

Preferably, the deployment cylinder is a telescopic oil cylinder, the cylinder body of the telescopic oil cylinder is connected to the fixed leg, and the telescopic rod of the telescopic oil cylinder is connected to the movable leg; and the telescopic outrigger device is also provided with a sequence valve, The first oil port of the sequence valve communicates with the fluid channel, and the second oil port of the sequence valve communicates with the rodless cavity of the support cylinder.

Preferably, the sequence valve is a one-way sequence valve.

Preferably, the elastic element is a coil spring, the coil spring is sleeved on the support rod, one end of the coil spring is connected to the bottom wall of the support cylinder, and the other end is connected to the large end surface of the support rod.

Preferably, it also includes a reversing valve, the first oil port of the reversing valve is connected to the first oil circuit, and the second oil port of the reversing valve is connected to the rod cavity of the deployment cylinder; the third oil port of the reversing valve It is a normally closed oil port.

Preferably, it also includes a multi-way reversing valve, the oil inlet of the multi-way reversing valve is connected to the hydraulic oil source, the oil return port of the multi-way reversing valve is connected to the oil tank, and the first An oil port communicates with the first oil passage, and a second oil port of the multi-way reversing valve communicates with the rodless chamber of the deployment cylinder.

Preferably, a hydraulic lock is also included, and the second oil port of the multi-way reversing valve communicates with the rodless cavity of the deploying cylinder through the hydraulic lock.

Preferably, the reversing valve is an electromagnetic reversing valve.

In addition to the above-mentioned telescopic outrigger device for construction machinery, the present invention also provides a construction machine, including a vehicle frame and a telescopic outrigger device connected to the vehicle frame, and the telescopic outrigger device is as described in any one of the above-mentioned The telescopic outrigger device of construction machinery.

A telescopic outrigger device for construction machinery provided by the present invention comprises a fixed leg and a movable leg connected to the fixed leg through a horizontal deployment cylinder, a support cylinder is arranged at the end of the movable leg, and the telescopic rod of the deployment cylinder has a fluid channel, The rodless cavity of the support cylinder communicates with the external fluid pipeline of the fixed leg through the rodless cavity of the deployment cylinder and the fluid channel, and an elastic element that expands and contracts in the vertical direction is arranged inside the support cylinder, and one end of the elastic element Connect the top wall or bottom wall of the support cylinder, and the other end connects the support rod of the support cylinder.

The working fluid required by the supporting cylinder in the telescopic outrigger device provided by the present invention can flow in or out to the supporting cylinder through the fluid channel provided on the telescopic rod of the expanding cylinder and the rodless chamber of the expanding cylinder. This arrangement is relatively simple. The installation and maintenance are relatively convenient, and this setting method avoids the friction between the fluid pipeline of the support cylinder and the support legs when the support legs are stretched, and increases the reliability of the work of the support cylinder.

In addition, there is no need to set drag chains inside the outriggers, which not only reduces the overall weight of the outriggers, but also optimizes the structure of the outriggers, making the structure more compact and increasing the use strength of the outriggers.

Description of drawings

Fig. 1 is a schematic structural view of a typical telescopic outrigger device in the prior art;

Fig. 2 is a structural schematic diagram of a specific embodiment of the telescopic outrigger device of construction machinery provided by the present invention;

Fig. 3 is a working principle diagram of the control mode of the telescopic outrigger device shown in Fig. 2 .

Wherein, the corresponding relationship between reference numerals and component names in Fig. 1 is:

1'Telescopic outriggers; 2'Support oil cylinder; 3'Oil pipe.

Wherein, the corresponding relationship between reference numerals and component names in Fig. 2 and Fig. 3 is:

1 telescopic outrigger; 11 movable leg; 2 expansion cylinder; 21 telescopic rod; 211 fluid channel; 22 cylinder body of expansion cylinder; 3 support cylinder; Sequence valve; 6 reversing valve; 7 multi-way reversing valve; 8 hydraulic lock; P oil inlet; T return oil port; A first oil port; B second oil port; C first oil port of reversing valve .

Detailed ways

The core of the present invention is to provide a telescopic outrigger device for engineering machinery, the internal oil pipes of the telescopic outrigger device are simple in arrangement, and easy to install and maintain. Another core of the present invention aims to provide a construction machine including the above telescopic outrigger device.

Without loss of generality, this article takes the outrigger of the telescopic outrigger device of construction machinery as an example to introduce the technical solution of the present invention. Those skilled in the art should understand that the telescopic outrigger in the present invention is not excluded. The supporting legs in the leg device are multi-stage telescopic supporting legs.

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Please refer to Fig. 2 and Fig. 3, Fig. 2 is a structural schematic diagram of a specific embodiment of the telescopic outrigger device of construction machinery provided by the present invention; Fig. 3 is a working principle diagram of the control mode of the telescopic outrigger device shown in Fig. 2 .

In a specific embodiment, the telescopic outrigger device of a construction machine provided by the present invention includes a fixed leg connected to the frame of the construction machine and a movable leg connected to the fixed leg through a horizontal expansion cylinder 2 11. Generally, one end of the cylinder body 22 of the deployment cylinder is connected to the fixed leg, and one end of the telescopic rod is connected to the movable leg 11. Through the extension and retraction of the deployment cylinder 2, the movable leg 11 can be extended or retracted relative to the fixed leg; of course , the expansion rod 21 of the cylinder can also be connected to the fixed leg, and the cylinder body can also be connected to the movable leg 11.

The end of the movable leg 11 is also provided with a support cylinder 3, and the telescopic rod 21 of the deployment cylinder has a fluid passage 211, and the rodless chamber of the support cylinder 3 communicates with the external fluid of the fixed leg through the rodless chamber and the fluid passage 211 of the deployment cylinder 2. The pipeline, that is, the support chamber can communicate with the fluid channel in the telescopic rod through the hydraulic oil inlet on the cylinder 31, and the support cylinder 3 is provided with an elastic element that expands and contracts in the vertical direction, and one end of the elastic element is connected to the support The top wall or bottom wall of the cylinder 3 is connected with the support rod 32 supporting the cylinder at the other end.

The number of telescopic outriggers 1 is set according to the different operation needs of construction machinery, which can be four, or six or other numbers, or multi-section telescopic outriggers; the expansion cylinder 2 and support cylinder 3 can be telescopic oil cylinders , can also be a telescopic cylinder, that is, the corresponding fluid is hydraulic oil and gas.

In the telescopic outrigger device provided in the present invention, before construction machinery works, under the action of the expansion cylinder 2, the movable leg 11 is stretched relative to the fixed leg. The fluid channel 211 in the rodless chamber of cylinder 2 and its telescoping rod 21 enters support cylinder 3, and support rod 32 is stretched out and is supported on the ground; Under the action of its own weight and the restoring force of the elastic element, the fluid in the rodless cavity is discharged out of the cylinder along the original path, and returns to the non-working state.

The working fluid required by the support cylinder 3 in the telescopic outrigger device provided by the present invention can flow in or out to the support cylinder through the fluid channel 211 provided on the telescopic rod of the deployment cylinder 2 and the rodless cavity of the deployment cylinder 2. The method is relatively simple, and the installation and maintenance are more convenient, and this setting method avoids the friction between the fluid pipeline of the support cylinder and the support legs when the support legs are stretched, and increases the reliability of the work of the support cylinder.

In addition, there is no need to set drag chains inside the outriggers, which not only reduces the overall weight of the outriggers, but also optimizes the structure of the outriggers, making the structure more compact and increasing the use strength of the outriggers.

In a specific embodiment, the deployment cylinder 2 can be a telescopic oil cylinder, correspondingly, the support cylinder 3 is also an oil cylinder, the fluid is hydraulic oil, the cylinder body of the telescopic oil cylinder is connected to the fixed leg, and the telescopic rod of the telescopic oil cylinder is connected to The movable leg 11 ; and the telescopic outrigger device can also be provided with a sequence valve, the first oil port of the sequence valve communicates with the fluid channel 211 , and the second oil port of the sequence valve communicates with the rodless cavity of the support cylinder 3 .

The setting of the opening pressure of the sequence valve can be set according to the pressure required to fully expand the telescopic outrigger. When the telescopic outrigger is extended to the specified position, the external fluid pipeline continues to fill hydraulic oil into the expansion cylinder 2. When the hydraulic oil When the opening pressure of the sequence valve is reached, the sequence valve is opened, and the hydraulic oil enters the rodless chamber of the support cylinder 3, pushing the telescopic rod of the support cylinder 3 to move downward to jack up the car body.

The sequence valve is set in the telescopic outrigger device, which can ensure that the support cylinder 3 starts to move only after the telescopic outrigger is fully expanded, which increases the safety and reliability of the work.

The above-mentioned sequence valve can also be a one-way sequence valve 5, that is, the sequence valve and the one-way valve are used together. When the support cylinder 3 is supported, the hydraulic oil enters the rodless cavity of the support cylinder 3 through the sequence valve. Finally, under the action of the elastic element, the hydraulic oil in the support cylinder 3 flows back into the hydraulic pipeline through the one-way valve.

The one-way sequence valve 5 is conducive to the smooth return of the hydraulic oil in the support cylinder 3 .

In a preferred embodiment, the elastic element can be a helical spring 4. According to the space of the supporting cylinder 3 and the specific use conditions, a certain specification and type of helical spring 4 is selected, and the helical spring 4 is set on the supporting rod 32 of the supporting cylinder 3. One end of the coil spring 4 is connected to the bottom wall of the support cylinder 3 , and the other end is connected to the large end surface of the support rod 32 .

The coil spring 4 is arranged in the rod chamber. When the coil spring 4 is stretching and deforming, the support rod 32 can play a good guiding role for the spring, which is beneficial to the deformation of the coil spring 4 in the vertical direction and prevents the coil spring 4 from being deformed. Tilting occurs during deformation to avoid friction between it and the cylinder wall to cause wear of the two, which can improve the service life of the coil spring 4 and the support cylinder 3 . Moreover, the helical spring 4 has the characteristics of no need for lubrication, strong anti-fouling property, and the helical spring 4 itself has the characteristics of small mass, which can increase the weight of the legs, and does not need to be maintained during use, and has a relatively long service life.

It should be noted that the elastic element can also be arranged in the rodless cavity of the support cylinder 3, as long as it works reliably and can achieve the technical effect herein.

The elastic element can also be a cylindrical helical spring, which has relatively low purchase cost; the elastic element can also be a conical helical spring with variable stiffness, and the stability of the conical helical spring is relatively high.

In a more optimal embodiment, the telescopic outrigger device can also include a reversing valve, which can be a manual reversing valve or an electric reversing valve, and the first oil port C of the reversing valve is connected to the second One oil circuit, the second oil port communicates with the rod chamber of the expansion cylinder 2; the third oil port of the reversing valve is a normally closed oil port.

The reversing valve 6 can conveniently realize the communication, reversing and cutting off of the hydraulic oil, and the operation is simple.

In a preferred embodiment, the telescopic outrigger device may also include a multi-way reversing valve 7, the oil inlet P of the multi-way reversing valve 7 communicates with the hydraulic oil source, and the oil return port T of the multi-way reversing valve 7 The first oil port A of the multi-way reversing valve is connected with the first oil port C of the reversing valve, and the second oil port B of the multi-way reversing valve is connected with the rodless cavity of the deploying cylinder 2 .

The multi-way reversing valve 7 can conveniently realize the communication and reversing of the hydraulic oil, and the operation is simple.

In each of the above-mentioned embodiments, the telescopic outrigger device can also include a hydraulic lock 8, which can be manual or electronically controlled. Stemless cavity.

When the hydraulic system and the hydraulic cylinder fail, the hydraulic lock 8 can quickly and reliably locate the deployment cylinder 2 and the support cylinder 3 at their working positions without additional energy supply, and also ensure the safety of the staff and equipment. Safety, when the failure of the hydraulic system and the hydraulic cylinder function is removed, and the hydraulic oil source provides hydraulic pressure again, the deployment cylinder 2 and the support cylinder 3 resume work.

The reversing valve in the above embodiments can be an electromagnetic reversing valve; the electromagnetic valve can change the direction of the oil circuit through its own power on and off, which is beneficial to realize the automatic control of construction machinery and improve the working efficiency of construction machinery.

The present invention also provides a construction machine, including a power system and a telescopic outrigger device connected to the power system, and the telescopic outrigger device is the telescopic outrigger device of the construction machine described in any one of the above embodiments.

The construction machine has the above-mentioned telescopic outrigger device. Since the above-mentioned telescopic outrigger device has the above-mentioned technical effect, the construction machine with the telescopic outrigger device should also have the corresponding technical effect.

For the structures of other parts of the construction machinery mentioned above, please refer to existing materials, and do not repeat them here.

The telescopic outrigger device and construction machinery provided by the present invention have been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention, and the descriptions of the above embodiments are only used to help understand the method and core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (9)

1. the telescopic outrigger device of a construction machinery and equipment; Comprise Convenient table and with said Convenient table through horizontal development cylinder bonded assembly movable leg; The end of said movable leg (11) is provided with shoring (3), it is characterized in that, the expansion link of said expansion cylinder (2) has the fluid passage; The rodless cavity of said shoring (3) is through the rodless cavity of said expansion cylinder (2) and the external fluid pipeline of the said Convenient table of said fluid passage (211) connection; And be provided with vertically flexible elastic element in the said shoring (3), an end of said elastic element connects the roof or the diapire of said shoring (3), and the other end connects the strut bar (32) of said shoring (3).

2. the telescopic outrigger device of construction machinery and equipment as claimed in claim 1 is characterized in that, said expansion cylinder is a telescopic oil cylinder, and the cylinder body of telescopic oil cylinder connects Convenient table, and the expansion link of telescopic oil cylinder connects movable leg (11); And said telescopic outrigger device also is provided with sequence valve, and first hydraulic fluid port of said sequence valve is communicated with said fluid passage (211), and second hydraulic fluid port of said sequence valve is communicated with the rodless cavity of said shoring (3).

3. the telescopic outrigger device of construction machinery and equipment as claimed in claim 2 is characterized in that, said sequence valve is one way sequence valve (5).

4. the telescopic outrigger device of construction machinery and equipment as claimed in claim 3; It is characterized in that; Said elastic element is coil spring (4); Said coil spring (4) is set in said strut bar (32), and said coil spring (4) one ends connect the diapire of said shoring (3), and the other end connects the large end face of said strut bar (32).

5. the telescopic outrigger device of construction machinery and equipment as claimed in claim 4 is characterized in that, also comprises change-over valve (6), and first hydraulic fluid port (C) of said change-over valve connects first oil circuit, and its second hydraulic fluid port is communicated with the rod chamber of said expansion cylinder; The 3rd hydraulic fluid port of said change-over valve (6) is normally closed hydraulic fluid port.

6. the telescopic outrigger device of construction machinery and equipment as claimed in claim 5; It is characterized in that; Also comprise multiple directional control valve (7), the oil inlet of said multiple directional control valve (7) is communicated with hydraulic oil source, and the return opening of said multiple directional control valve (7) is communicated with fuel tank; First hydraulic fluid port (A) of said multiple directional control valve (7) is communicated with said first oil circuit, and second hydraulic fluid port (B) of said multiple directional control valve (7) is communicated with the rodless cavity of said expansion cylinder (2).

7. the telescopic outrigger device of construction machinery and equipment as claimed in claim 6 is characterized in that, also comprises hydraulic lock (8), and second hydraulic fluid port of said multiple directional control valve (7) is communicated with the rodless cavity of said expansion cylinder through said hydraulic lock (8).

8. the telescopic outrigger device of construction machinery and equipment as claimed in claim 7 is characterized in that, said change-over valve (6) is a solenoid directional control valve.

9. construction machinery and equipment, comprise vehicle frame and with said vehicle frame bonded assembly telescopic outrigger device, it is characterized in that the telescopic outrigger device that said telescopic outrigger device is each described construction machinery and equipment of claim 1 to 8.

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