WO2013104157A1

WO2013104157A1 - Rocker structure, bobbing mechanism, pumping system and engineering machine

Info

Publication number: WO2013104157A1
Application number: PCT/CN2012/074043
Authority: WO
Inventors: 李继波; 李建涛; 贾建锋
Original assignee: 湖南三一智能控制设备有限公司; 三一重工股份有限公司
Priority date: 2012-01-10
Filing date: 2012-04-14
Publication date: 2013-07-18
Also published as: CN102518304B; CN102518304A

Abstract

A rocker structure and a bobbing mechanism of a pumping system, a pumping system, and an engineering machine. The rocker structure (13) comprises a first swinging part (131) and a second swinging part (132) arranged along a rotating axis direction of a rotating part (133). A left swinging valve oil cylinder (11) and a right swinging valve oil cylinder (12) are respectively connected to the first swinging part (131) and the second swinging part (132), so that the left and right swinging valve oil cylinders (11, 12) can be arranged in two different vertical planes, thus flexibly arranging the components of the bobbing mechanism. Therefore, the kinetic moment of the bobbing mechanism during the swinging process is reasonably distributed; the moment value of the rocker structure (13) gradually decreases from the starting to the termination, thereby preventing the bobbing mechanism from becoming incapable of swinging and reducing the reversing impact force; the impact on a distribution valve and the like is reduced; the vibration of the bobbing mechanism, the distribution valve, and the pumping system is alleviated; the wearing of the parts is reduced and the service life of the parts is prolonged.

Description

The invention relates to a rocker arm structure, a swinging mechanism, a pumping system and a construction machine. The application is submitted to the Chinese Patent Office on January 10, 2012, and the application number is 20121006279.5. The invention name is "a rocker arm structure, a swinging mechanism, Priority of the Chinese Patent Application for Pumping Systems and Engineering, the entire contents of which are incorporated herein by reference.

Technical field

The invention relates to the field of pumping technology, and in particular to a rocker arm structure. Further, the present invention relates to a swinging mechanism, a pumping system, and a construction machine including the above-described rocker arm structure.

Background technique

Concrete pumping equipment is a kind of construction machinery that uses pressure to continuously transport concrete along pipelines. It is mainly used in housing construction, bridges and tunnel construction. It is a common mechanical equipment used in construction machinery. Common concrete pumping equipment has concrete pump. Cars, pumps, etc.

The concrete pumping device generally comprises a conveying cylinder, a hopper, a dispensing valve and a swinging mechanism, the hopper is used for storing concrete; the dispensing valve is capable of performing state transition under the driving of the swinging mechanism, and the conveying cylinder is made in a predetermined first time The hopper is connected, the concrete pumping device performs suction, and the conveying cylinder is connected with the conveying pipe in a predetermined second time, and the concrete pumping device performs pumping. The concrete pumping equipment delivers a certain amount of concrete to the outside through multiple suctions and pumping.

Please refer to FIG. 1. FIG. 1 is a schematic structural view of a typical swinging mechanism in the prior art. A typical swinging mechanism in the prior art includes a left swing valve cylinder 2, a right swing valve cylinder 1, a rocker arm 3, and a left and right swing valve seat 4, and the outer ends of the left swing valve cylinder and the right swing valve cylinder The left and right swing valve seats are respectively connected, and the inner ends are respectively hinged to the rocker arm, and the rocker arm is further provided with a mounting hole 31 for connecting the swinging shaft of the distribution valve in the hopper. Under the action of hydraulic oil, the piston rods of the left and right swing valve cylinders are pushed, the piston rod drives the rocker arm to swing, and the rocker arm drives the swinging shaft of the distribution valve to rotate, thereby realizing the reversal of the distribution valve.

Please refer to FIG. 2, FIG. 3, FIG. 2 is a schematic diagram of the movement principle of the swinging mechanism shown in FIG. 1. FIG. 3 is a diagram of the left swing valve cylinder during the movement of the swinging mechanism shown in FIG. 1 from the left extreme position to the right extreme position. A schematic diagram of the relationship between the force arm of the rocker arm and the swing angle of the rocker arm with respect to the left extreme position.

In order to more clearly understand the motion principle of the prior art swinging mechanism, FIG. 2 shows the motion principle diagram of the swinging mechanism, and FIG. 2 is a schematic diagram of the position of the components of the swinging mechanism in the left extreme position, wherein FIG. 2 The letters A', B', C', D', E' represent: the hinge point between the left swing valve cylinder and the left swing valve seat, the hinge point between the right swing valve cylinder and the right swing valve seat, and the rocker arm Rotation center point, The hinge point between the left swing valve cylinder and the rocker arm, and the hinge point between the right swing valve cylinder and the rocker arm.

It can be seen from Fig. 3 that during the movement of the swinging mechanism from the left limit position to the right limit position, the left swing valve cylinder acts on the rocker arm and the rotational arm is basically a "small-large-small" variation. That is, the swinging mechanism has the minimum starting torque, the intermediate torque is the largest, and the ending torque is smaller than the intermediate torque but larger than the starting torque. Comprehensive analysis of the prior art swinging mechanism has the following disadvantages: First, when the concrete material in the hopper When there are many medium gravel and the ratio is relatively poor, the starting torque is relatively small, which may lead to the phenomenon that the swinging mechanism "cannot move" after waiting for a period of time;

Secondly, when the swinging mechanism starts to rotate to about 35 degrees, the torque of the swinging mechanism reaches the maximum, but at this time, the dispensing valve has already oscillated, and does not require a large torque, which is liable to cause a torque waste;

Third, the termination torque is greater than the starting torque, and the commutation impact is relatively large, which easily leads to wear of various components.

Therefore, how to develop a rocker arm structure, which can realize flexible arrangement of various components of the swinging mechanism, is beneficial to rationally distributing the dynamic torque during the swinging process of the swinging mechanism, and becomes a technical problem to be solved by those skilled in the art. .

Summary of the invention

A first object of the present invention is to provide a rocker arm structure which can realize flexible arrangement of various components of the swinging mechanism, and is advantageous for rationally distributing the dynamic moment during the swinging of the swinging mechanism. Further, a second object of the present invention is to provide a swinging mechanism, a pumping system, and an engineering machine including the above-described rocker arm structure.

In order to achieve the first object of the present invention, a first aspect of the present invention provides a rocker arm structure for a swing mechanism of a pumping system, the swing mechanism including a left swing valve cylinder and a right swing valve cylinder The left swing valve seat and the right swing valve seat, the outer ends of the left swing valve cylinder and the right swing valve cylinder are respectively hinged with the left swing valve seat and the right swing valve seat, and the rocker arm structure includes a first swing portion, a second swinging portion and a rotating portion; the rotating portion is connected to a distribution valve of the pumping system; and the inner ends of the left swinging valve cylinder and the right swinging valve cylinder are respectively hinged to the first swinging portion and the second swinging portion a hinge point, a second hinge point, and the first hinge point and the second hinge point have a predetermined distance in a direction of a rotation axis of the rotating portion.

Preferably, the first rocking portion and the second rocking portion are disposed on the right side and the left side of the plane of the rotation axis of the rotating portion. Preferably, the first swinging portion and the second swinging portion are respectively provided with ball joints, and the inner ends of the left swing valve cylinder and the right swing valve cylinder are respectively coupled with the first swing portion and the second swing portion. Hinged to the first hinge point and the second hinge point.

Preferably, the distance between the first hinge point and the second hinge point to the rotation axis of the rotating portion is equal.

Preferably, the distance between the first hinge point and the second hinge point to the rotation center point of the rotating portion is equal.

Preferably, the first rocking portion and the second rocking portion are provided with a lubricating oil passage that communicates with the ball joint.

Preferably, when the rocker arm structure is in the left extreme position, the angle between the straight line determined by the first hinge point and the rotation center point of the rotating portion and the axis of the left swing valve cylinder is 85 degrees to 95 degrees; when the rocker arm structure is in the right extreme position, the second hinge point, the rotation of the rotating portion, the line determined by the '-point and the axis of the right swing valve cylinder are in the range of 85 Degree to 95 degrees.

In the first technical solution provided by the present invention, a rocker arm structure is used for a rocking mechanism of a pumping system, and the rocking mechanism includes a left swing valve cylinder, a right swing valve cylinder, a left swing valve seat, and a right swing valve seat. The outer ends of the left swing valve cylinder and the right swing valve cylinder are respectively hinged with the left swing valve seat and the right swing valve seat, and the rocker arm structure includes a first swing portion, a second swing portion and a rotating portion; The portion is connected to the distribution valve of the pumping system, and the inner ends of the left swing valve cylinder and the right swing valve cylinder are respectively hinged to the first swing portion and the second swing portion to the first hinge point and the second hinge point;

When the rocker arm structure is in the left extreme position, the angle between the straight line determined by the first hinge point and the rotation center point of the rotating portion and the axis of the left swing valve cylinder ranges from 85 degrees to 95 degrees; When the rocker arm structure is in the right extreme position, the second hinge point, the straight line determined by the rotation center point of the rotating portion and the axis of the right swing valve cylinder are in the range of 85 degrees to 95 degrees.

Preferably, the first rocking portion and the second rocking portion are disposed on the right side and the left side of the plane of the rotation axis of the rotating portion; the first hinge point and the second hinge point are in the rotation axis direction of the rotating portion Has a predetermined distance.

In order to achieve the second object of the present invention, the present invention also provides a swinging mechanism of a pumping system, comprising a left swing valve cylinder, a right swing valve cylinder, a rocker arm structure, a left swing valve seat, and a right swing valve seat. Place The rocker arm structure is the rocker arm structure described in any of the above.

On the basis of the above, the present invention further provides a pumping system, comprising a hopper and a dispensing valve, characterized by further comprising a swinging mechanism of the pumping system, wherein the left swing valve seat and the right swing valve seat are fixed. On the hopper.

Further, the present invention provides a construction machine including the above pumping system.

The rocker arm structure provided by the present invention includes a first swinging portion and a second swinging portion arranged along a rotation axis direction of the rotating portion, and the left swinging valve cylinder and the right swinging valve cylinder are respectively hinged to the first swinging portion and the second swinging portion. a first hinge point, a second hinge point, and the first hinge point D and the second hinge point E have a predetermined distance in a direction of a rotation axis of the rotating portion 133, such that the left and right swing valve cylinders can be arranged in two Swing in a plane. Compared with the prior art, the two swing valve cylinders are arranged in the same vertical plane, the rocker arm structure can realize the flexible arrangement of the components of the swinging mechanism, and the specific torque distribution principle in the swinging mechanism according to the swinging mechanism , the position of the first hinge point and the second hinge point are reasonably arranged such that when the rocker arm structure is at the left limit position or the right limit position, the left/right swing valve cylinder acts on the rocker arm with the maximum or maximum position of the swing arm In the vicinity, therefore, the starting torque value of the swinging mechanism is at or near the maximum value, which can overcome the phenomenon that the swinging mechanism of the prior art is "swinging," and, as the hydraulic oil is continuously injected, the piston of the swinging cylinder The rod gradually elongates, and the rotating arm acting on the rocker arm gradually decreases, and the moment is gradually reduced, so that the end torque is relatively small, the reversing impact force can be reduced, the impact on the components such as the distribution valve can be reduced, and the vibration can be reduced. The vibration of the swinging mechanism, the distribution valve, and the pumping system reduces the wear of the components and improves the service life of the components.

DRAWINGS

1 is a schematic structural view of a typical swinging mechanism in the prior art;

2 is a schematic view showing the movement principle of the swinging mechanism shown in FIG. 1;

3 is a schematic view showing the relationship between the force arm and the swing angle during the movement of the swinging mechanism shown in FIG. 1; FIG. 4 is a schematic structural view of a swinging mechanism according to the present invention; FIG. Schematic diagram of the motion principle of the rocking mechanism;

Figure 6 is a schematic view showing the relationship between the force arm and the swing angle during the movement of the swinging mechanism shown in Figure 4; Figure 7 is a schematic view showing the structure of the rocker arm of Figure 4;

Figure 8 is a side view of Figure 7;

Figure 9 is a plan view of Figure 7; Figure 10 is a three-dimensional view of the rocker arm of Figure 7.

Wherein, the correspondence between the component names and the reference numerals in FIGS. 1 and 3 is as follows: left swing valve cylinder 1; right swing valve cylinder 2; rocker arm 3; swing valve seat 4; mounting hole 31; The hinge point between the cylinder and the left swing valve seat ;'; the hinge point between the right swing valve cylinder and the right swing valve seat Β'; the center point C of the rocker arm; the hinge between the left swing valve cylinder and the rocker arm Point D'; the hinge point between the right swing valve cylinder and the rocker arm'.

The correspondence between the component names and the reference numerals in FIGS. 4 to 10 is as follows: a left swing valve cylinder 11; a right swing valve cylinder 12; a rocker arm structure 13; a first swing portion 131; a second swing portion 132. Rotating portion 133; ball joint 134; lubricating oil passage 135; left swing valve seat 14, right swing valve seat 15, hinge point between left swing valve cylinder and left swing valve seat; right swing valve cylinder and right swing The hinge point between the valve seats; the center point C of rotation of the rocker arm; the first hinge point D; the second hinge point Ε.

detailed description

The first core of the present invention provides a rocker arm structure which can realize flexible arrangement of various components of the swinging mechanism, and is advantageous for rationally distributing the dynamic moment during the swinging of the swinging mechanism. Further, the second core of the present invention is to provide a swinging mechanism, a pumping system, and an engineering machine including the above-described rocker arm structure.

In order to make those skilled in the art 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. 4 to FIG. 6 . FIG. 4 is a schematic structural diagram of a swinging mechanism according to an embodiment of the present invention; FIG. 5 is a schematic diagram of a motion principle of the swinging mechanism shown in FIG. 4; Schematic diagram of the relationship between the force arm and the swing angle during the movement of the swinging mechanism.

The present invention provides a swinging mechanism for a pumping system comprising a left swing valve cylinder 11, a right swing valve cylinder 12, a rocker arm structure 13, a left swing valve seat 14 and a right swing valve seat 15. The left swing valve seat 14 and the right swing valve seat 15 are fixed to the hopper, and the outer ends of the left swing valve cylinder 11 and the right swing valve cylinder 12 are respectively hinged to the left swing valve seat 14 and the right swing valve seat 15. The outer end of the left swing valve cylinder 11, that is, the bottom end of the cylinder is hinged to the left swing valve seat 14, and the outer end of the right swing valve cylinder 12, that is, the bottom end of the cylinder is hinged to the right swing valve seat 15, and the left swing valve cylinder 11 and the left pendulum The hinge point between the valve seat 14 and the hinge point between the right swing valve cylinder 12 and the right swing valve seat 15 are as shown in FIG.

The rocker arm structure 13 includes a first rocking portion 131, a second rocking portion 132, and a rotating portion 133; the rotating portion 133 is connected to a dispensing valve of the pumping system; the inside of the left swing valve cylinder 11 and the right swing valve cylinder 12 The first hinge portion 131 and the second swing portion 132 are respectively hinged to the first hinge point D and the second hinge point E, as shown in FIG. 5, and the first hinge point D and the second hinge point E are in the Since the rotation axis portion 133 has a predetermined distance in the rotation axis direction, the first swing valve cylinder 11 and the second swing valve cylinder 12 swing in two planes.

The rocker arm structure provided by the present invention includes a first rocking portion and a second rocking portion disposed along a rotation axis direction of the rotating portion, and the left swing valve cylinder and the right swing valve cylinder are respectively hinged to the first swing portion and the second swing portion. a hinge point D, a second hinge point E, and the first hinge point D and the second hinge point E have a predetermined distance in the direction of the rotation axis of the rotating portion 133, so that the left and right swing valve cylinders can be arranged in two Swing in one plane. Compared with the prior art, the two swing valve cylinders are arranged in the same vertical plane, the rocker arm structure can realize the flexible arrangement of the components of the swinging mechanism, and the specific torque distribution principle in the swinging mechanism according to the swinging mechanism , the position of the first hinge point and the second hinge point are reasonably arranged, so that the rocker arm structure is at the left limit position or the right limit position is activated, and the left/right swing valve cylinder acts on the rocker arm to maximize or maximize the swing arm Near the position, therefore, the starting torque value of the swinging mechanism is at or near the maximum value, which can overcome the phenomenon that the swinging mechanism of the prior art is "swinging"; and, as the hydraulic oil is continuously injected, the piston of the swinging cylinder The rod gradually elongates, and the rotating force arm acting on the rocker arm structure is gradually reduced, and the moment is gradually reduced, so that the end torque is relatively small, the reversing impact force can be reduced, and the impact on the components such as the distribution valve can be reduced. Reduces the vibration of the swinging mechanism, the distribution valve, and the pumping system, reducing wear and tear on components and improving the service life of components.

It should be noted that the predetermined distance between the first hinge point 0 and the second hinge point E in the rotation axis direction of the rotating portion 133 can be adjusted according to parameters such as the structure of the pumping system and the pumping displacement.

7 is a schematic structural view of the rocker arm structure of FIG. 4; FIG. 8 is a side view of FIG. 7, FIG. 9 is a top view of FIG. 7, and FIG. 10 is a three-dimensional view of the rocker arm structure of FIG. .

In a specific embodiment, the first swinging portion 131 and the second swinging portion 132 are distributed on the right side and the left side of the plane of the rotation axis of the rotating portion 133, and the left swing valve cylinder 11 and the right swing valve cylinder 12 The first swinging portion 131 and the second swinging portion 132 are respectively hinged to the first hinge point D and the second hinge point E, that is, in a direction perpendicular to the rotation axis of the rotating portion 133, the first hinge point D, the first The two hinge points E have a predetermined distance. In the above configuration, the left swing valve cylinder 11 is hinged to the first swing portion 131 on the right side, the right swing valve cylinder 12 and the second swing on the left side. The portion 132 is hinged.

As shown in FIG. 9, the rotation axis of the rotating portion 133 is the ordinate axis Y, perpendicular to the ordinate axis Y, and the axis of the rotation center point C of the rotating portion 133 is the abscissa axis X, and the two-dimensional vertical coordinate system XCY is established. The first rocking portion 131 and the second rocking portion 132 are respectively located in the fourth quadrant IV and the second quadrant II, that is, the first hinge point D and the second hinge point E are in the fourth quadrant IV and the second quadrant II. And both have a predetermined distance in the X and Y directions.

It should be noted that the first rocking portion 131 and the second rocking portion 132 are configured as two swing arms provided in the rotating portion 133 as shown in FIG. In the specific structural design, connecting members (such as connecting rods) may be provided between the two swing arms to enhance the stability and stress performance of the entire rocking structure.

The rocker arm structure is applied to the rocking mechanism of the pumping system. When the rocker arm structure 13 is at the left limit position, the first hinge point D between the left swing valve cylinder 11 and the first rocking portion 131, and the rotation of the rotating portion 133 The angle defined by the center point C and the axis of the left swing valve cylinder 11 are in the range of 85 degrees to 95 degrees; when the rocker arm structure 13 is in the right limit position, between the right swing valve cylinder 12 and the second swinging portion 132 The second hinge point E, the straight line determined by the rotation center point C of the rotating portion 133, and the axis of the right swing valve cylinder 12 are in the range of 85 to 95 degrees.

That is, when the rocker arm is in the left/right limit position, the straight line determined by the first/second hinge point and the rotation center point C of the rotating portion 133 is approximately the same as the angle of the left/right swing valve cylinder axis. At about 90 degrees, of course, when the angle between the two is 90 degrees, the position is optimal.

Figure 6 shows the change of the dynamic torque of the swing valve cylinder of the swinging mechanism from start to stop. The abscissa is the swing angle of the rocker arm, and the ordinate is the size of the arm. In this figure, the swing mechanism is left. In the right limit position, the straight line determined by the first/second hinge point and the rotation center point C of the rotating portion 133 is perpendicular to the axis of the left/right swing valve cylinder.

Referring to FIG. 6 , in a specific embodiment, the swing angle of the first/second swing portion of the rocker arm structure is 70 degrees, that is, the swing portion is rotated from one extreme position to another limit position, and the angle of rotation is 70 degrees. Degree, the abscissa in Fig. 6 indicates the angle at which the rocking portion is swung relative to the initial position, and the angle at which the middle rocking portion is at the starting position is specified to be zero degrees. As can be seen from Fig. 6, the swinging mechanism is moved from an extreme position to another During the movement of the extreme position, the swinging force of the pendulum valve cylinder acting on the rocker arm is basically a "gradually decreasing" variation, that is, the swinging mechanism is activated at the maximum dynamic torque, and the minimum dynamic torque is terminated. Through the above configuration, in the left limit position or the right limit position, the corresponding swing cylinder is hydraulic oil, and the starting torque of the swing mechanism is at the maximum or near the maximum position of the starting torque, so the starting torque value of the swing mechanism is the largest or Being in the vicinity of the maximum value can overcome the phenomenon that the swinging mechanism of the prior art is "swinging," and as the hydraulic oil is continuously injected, the piston rod of the swing valve cylinder gradually elongates, and the force acting on the rocker arm structure The arm is gradually reduced, and the torque is gradually reduced, so that the termination torque is relatively small, the commutation impact force can be reduced, the impact on the components such as the distribution valve can be reduced, and the vibration of the swinging mechanism, the distribution valve, and the pumping system can be reduced. Reduce wear and tear on components and increase component life.

In a preferred embodiment, the first swinging portion 131 and the second swinging portion 132 are respectively provided with ball joints 134, and the inner ends of the left swing valve cylinder 11 and the right swing valve cylinder 12 are respectively first and The ball joint 134 of the rocking portion 131 and the second rocking portion 132 is hinged to the first hinge point D and the second hinge point E. The ball joint can realize multi-angle rotation, which is beneficial to adjust the tension between the swing valve cylinder and the swing portion. Force surface to improve the service life of both.

In the above embodiments, the specific positions of the first hinge point D and the second hinge point E can also be designed. Preferably, the first hinge point D, the distance from the second hinge point E to the rotation axis of the rotating portion 133 may be equal, or the first hinge point 0, the second hinge point E to the rotation center of the rotating portion 133 The distance of point C is equal. The setting can make the lengths, the cylinder diameters, the rod diameters and the working strokes of the two swing valve cylinders equal, respectively, improve the coordination and consistency of the motion of the two swing valve cylinders, thereby further improving the swing stability of the swing mechanism and reducing the commutation punch. Hit and vibrate.

Specifically, the rotating portion 133 of the rocker arm structure 13 may be provided with a connecting hole, and the connecting hole may be provided with a spline, and the rotating shaft of the dispensing valve is disposed as a spline shaft to be spline-fitted with the rotating portion 133 For the specific structure of the distribution valve, reference may be made to the prior art, and details are not described herein. Spline connection can transmit relatively large torque, and it is better for neutrality and easy to disassemble.

In a preferred embodiment, the first rocking portion 131 and the second rocking portion 132 are further provided with a lubricating oil passage 135 that communicates with the corresponding ball joint 134. The opening of the lubricating oil passage 135 may be disposed at the first The upper end surface of the rocking portion and the second rocking portion may be disposed on the other end surface, and the oil passage 135 may be provided with a member such as an oil cup; the operator may inject the lubricating oil into the ball joint 134 through the lubricating oil passage 135. It can reduce the friction between the swinging part and the swing valve cylinder and prolong the service life.

Of course, the left swing valve cylinder 11 and the right swing valve cylinder 12 can be directly connected to the first shake The swing portion 131 and the second rocking portion 132 may be indirectly connected to the two rocking portions by a third party as long as the technical effects of the present invention can be achieved.

It should be pointed out that the inner end and the outer end of the above-mentioned pendulum valve cylinder are based on the relative position between the components in Fig. 4, which is a tube cleaning method. The piston rod and rocker arm of the pendulum valve cylinder are specified in this paper. One end of the structural connection is the inner end, and the bottom end of the cylinder of the pendulum valve cylinder is the outer end; those skilled in the art will appreciate that the inner and outer ends used herein should not limit the scope of protection herein.

It should be noted that the front and rear of the description herein are only based on the installation position of the rocker arm structure 13 in FIG. 4, and those skilled in the art should understand that the front and rear used herein should not limit the protection of the present invention. range.

In addition to the swinging mechanism described above, the present invention also provides a pumping system including a hopper, a dispensing valve disposed on the hopper, and a delivery cylinder, and the swinging mechanism of any of the above, the rocker arm structure The rotating portion 133 is coupled to the rotating shaft of the distribution valve.

Since the pumping system includes the swinging mechanism described above, it also has the technical effect of the swinging mechanism.

The technical features of other parts of the pumping system can be referred to the prior art, and are not described herein again. The rocker arm structure, the swinging mechanism, the pumping system and the engineering machine provided by the present invention have been described above, and the description of the above embodiments is merely for helping to understand the method of the present invention and its core idea. It should be noted that those skilled in the art can make various modifications and changes to the present invention without departing from the scope of the invention, and such modifications and modifications are also within the scope of the appended claims.

Claims

Rights request

1. A rocker arm structure for a rocking mechanism of a pumping system, the rocking mechanism comprising a left swing valve cylinder (11), a right swing valve cylinder (12), a left swing valve seat (14), and a right swing valve seat (15), the outer ends of the left pendulum valve cylinder (11) and the right pendulum valve cylinder (12) are respectively hinged with the left pendulum valve seat (14) and the right pendulum valve seat (15), wherein the rocking The arm structure includes a first rocking portion (131), a second rocking portion (132), and a rotating portion (133); the rotating portion (133) is coupled to a dispensing valve of the pumping system; the left swing valve cylinder ( 11), the inner end of the right swing valve cylinder (12) is respectively hinged to the first swing portion (131) and the second swing portion (132) to the first hinge point, the second hinge point, and the first hinge point, The second hinge point has a predetermined distance in the direction of the rotation axis of the rotating portion (133).

2. The rocker arm structure according to claim 1, wherein the first swinging portion

(131) The second rocking portion (132) is distributed on the right side and the left side of the plane on which the rotation axis of the rotating portion (133) is located.

The rocker arm structure according to claim 1 or 2, wherein the first rocking portion (131) and the second rocking portion (132) are provided with ball joints (134), and the left swing The inner ends of the valve cylinder (11) and the right swing valve cylinder (12) are respectively hinged to the first hinge point (131) and the ball joint seat (134) of the second swing portion (132) to the first hinge point and the second hinge point.

The rocker arm structure according to any one of claims 1 to 3, characterized in that the distance between the first hinge point and the second hinge point to the rotation axis of the rotating portion (133) is equal.

The rocker arm structure according to any one of claims 1 to 3, characterized in that the distance between the first hinge point and the second hinge point to the center of rotation of the rotating portion (133) is equal.

The rocker arm structure according to claim 3, wherein the first rocking portion (131) and the second rocking portion (132) are provided with lubricating oil passages connecting the ball joints (134) (135).

The rocker arm structure according to any one of claims 1 to 6, wherein when the rocker arm structure is in a left extreme position, the first hinge point and the rotation of the rotating portion (133) The line defined by the center point and the axis of the left pendulum valve cylinder (11) have an angle ranging from 85 degrees to 95 degrees; when the rocker arm structure is at the right limit position, the second hinge point, the rotation The line defined by the center of rotation of the portion (133) is at an angle of 85 to 95 degrees from the axis of the right pendulum valve cylinder (12).

8. A rocker arm structure for a rocking mechanism of a pumping system, the rocking mechanism comprising a left pendulum Valve cylinder (11), right swing valve cylinder (12), left swing valve seat (14), right swing valve seat (15), outer end of the left swing valve cylinder (11) and the right swing valve cylinder (12) Hinged to the left pendulum valve seat (14) and the right pendulum valve seat (15), respectively, wherein the rocker arm structure comprises a first rocking portion (131), a second rocking portion (132) and a rotating portion (133) The rotating portion (133) is connected to a distribution valve of the pumping system, and the inner ends of the left pendulum valve cylinder (11) and the right swing valve cylinder (12) are respectively coupled to the first rocking portion (131), The second rocking portion (132) is hinged to the first hinge point and the second hinge point;

When the rocker arm structure is in the left extreme position, the angle between the straight line determined by the first hinge point, the rotation center point of the rotating portion (133) and the axis of the left swing valve cylinder (11) is 85 degrees to 95 degrees; when the rocker arm structure is in the right limit position, the second hinge point, the straight line determined by the rotation center point of the rotating portion (133) and the right swing valve cylinder (12) The axis angle ranges from 85 degrees to 95 degrees.

The rocker arm structure according to claim 8, wherein the first rocking portion (131) and the second rocking portion (132) are distributed on the right side of a plane on which the rotation axis of the rotating portion (133) is located, Left side; the first hinge point and the second hinge point have a predetermined distance in a direction of a rotation axis of the rotating portion (133).

10. A swinging mechanism of a pumping system, comprising a left swing valve cylinder (11), a right swing valve cylinder (12), a rocker arm structure (13), a left swing valve seat (14), and a right swing valve seat (15) The rocker arm structure (13) is the rocker arm structure according to any one of claims 1 to 9.

A pumping system, comprising a hopper and a dispensing valve, characterized by further comprising a swinging mechanism of the pumping system according to claim 10, the left swing valve seat (14) and the right swing valve seat ( 15) Fixed to the hopper.

12. A construction machine comprising the pumping system of claim 11.