CN110410129A - A hydraulic dynamic control device for the wind field of fully mechanized excavation face - Google Patents

Abstract

The invention discloses a hydraulic dynamic control device for the wind field of a mechanized excavation face, which comprises a linear track and an adjustable air tube device. The adjustable air tube device is installed under the linear track and the air outlet of the adjustable air tube device can be moved The linear track moves back and forth, and the adjustable air cylinder device includes an air cylinder air outlet front and rear distance adjustment mechanism, an air cylinder air outlet angle upward adjustment adjustment mechanism, an air cylinder air outlet diameter adjustment mechanism and an air cylinder air outlet horizontal deflection adjustment mechanism. The invention has high structural reliability, good stability, high transmission precision and convenient installation; it can make the distribution of wind field, gas field and dust field on the mechanized excavation face more scientific and reasonable, improve work efficiency, and realize energy saving and green ventilation.

Description

A hydraulic dynamic control device for the wind field of fully mechanized excavation face

technical field

The invention relates to a dynamic control device for an air outlet, in particular to a hydraulic dynamic control device for a wind field at a fully mechanized excavation face.

Background technique

The demand for coal resources in my country has always been at a relatively high level, and the high-intensity mining of coal resources has brought about unavoidable practical problems such as mine disasters and environmental pollution. According to statistics in recent years, the gas and coal dust explosion accidents that occur during the excavation of coal mining machines account for 60% to 70% of the total number of gas and coal dust explosion accidents in mines. With the extension of the depth and breadth of coal mine mining, a series of problems such as excessively long ventilation distance, insufficient ventilation at underground mining points, excessive resistance along the tunnel ventilation, and reduced ventilation efficiency have gradually appeared in the mine excavation face. The tunneling coal roadway is a single-headed roadway, and the ventilation circuit is incomplete. The local ventilation system composed of local ventilators and air ducts is used to dilute and remove the gas gushing from the coal body and the dust generated during the operation of the coal mining machine. Therefore, the ventilation method of the local ventilation system, the rationality of the layout and the air flow velocity at the air outlet will directly affect the distribution of the air flow at the tunnel ventilation area, which in turn will affect the distribution of the gas concentration and the ventilation and tile discharge. Effect. Since the "Coal Mine Safety Regulations" only stipulates the reasonable wind speed range and the distance between the air outlet and the end of the tunneling face, the way to solve the ventilation needs of the tunneling work in various working conditions in the coal mine is to implement local ventilation control. It is to continuously increase the power of the local fan and change the movement state of the air duct. Excessive increase of the air volume at the excavation working face can also easily cause secondary dust, excessive local wind speed in the working area, and deterioration of working conditions at the driver and other positions.

The press-fit ventilation of the excavation roadway is limited by the wall-attached jet ventilation, which is different from the free jet flow. After the air flow is ejected from the fan cylinder, due to the limitation of the space of the single-headed roadway, the flow opposite to the direction of the air flow will soon appear. The airflow structure of jet ventilation in excavation working face can be divided into jet flow area, backflow area and eddy flow area. Part of the airflow in the jet area is ejected from the blower, and at the same time entrains a part of the airflow in the return area; part of the air flow in the return area is entrained by the jet, and part of it is discharged along the tunnel through the exit. Therefore, the increase in the length of the coal roadway, the increase in the cross-sectional area of the roadway, the change of the tunneling method, the increase in the advancing speed, the use of large equipment, and the increase in the gas content of the coal seam caused by the increase in the depth of the mine will all increase the local ventilation requirements for the coal roadway. The traditional extensive "total ventilation" local ventilation control method can no longer meet people's more stringent safety, efficiency and environmental protection requirements for fully mechanized excavation faces. This requires a comprehensive, comprehensive and refined management of the mutual coupling process of tunneling ventilation and gas and coal dust migration. With the advancement of technology, adjustable air ducts with adjustable air outlet diameter and angle have appeared. However, the existing adjustable air ducts need to be adjusted manually, which has problems such as inconvenient adjustment and low precision. For this reason, it is very necessary to design a dynamic control device for the wind field of fully mechanized excavation face.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a hydraulic dynamic control device for the wind field of fully mechanized excavation face, which has high structural reliability, good stability, high transmission precision and convenient installation. It can make the distribution of wind field, gas field and dust field in the fully mechanized excavation face more scientific and reasonable, improve work efficiency, and realize energy saving and green ventilation.

In order to achieve the above purpose, the technical solution adopted by the present invention is: a hydraulic dynamic control device for the wind field of fully mechanized excavation face, which is characterized in that it includes a linear track and an adjustable air cylinder device, and the adjustable air cylinder device is installed on the straight line Below the track, the air outlet of the adjustable air cylinder device can move forward and backward along the linear track. The tuyere diameter control mechanism and the horizontal deflection control mechanism of the air outlet of the air cylinder, the front and rear distance adjustment mechanism of the air outlet of the air cylinder is set between the air outlet of the adjustable air cylinder device and the linear track and is used to drive the adjustable air cylinder device The air outlet of the air cylinder moves back and forth along the linear track, and the upward adjustment mechanism of the air outlet angle of the air cylinder is arranged at the air outlet of the adjustable air cylinder device and is used to adjust and change the upward elevation of the air outlet of the adjustable air cylinder device angle, the regulating mechanism of the air outlet diameter of the air cylinder is arranged at the air outlet of the adjustable air cylinder device and is used to adjust the diameter of the air outlet of the adjustable air cylinder device, and the horizontal deflection of the air cylinder air outlet is controlled The mechanism is arranged at the air outlet of the adjustable air cylinder device and is used to adjust the horizontal deflection angle of the air outlet of the adjustable air cylinder device;

The front and rear distance control mechanism of the air outlet of the air duct includes a driving device, a transmission shaft, a first transmission gear, a second transmission gear, a first driving wheel, a second driving wheel, a first driven wheel, a second driven wheel, an encoding device, a first mounting plate, a second mounting plate and a connecting rod, the first mounting plate and the second mounting plate are vertically arranged, and the connecting rod is arranged at the lower part between the first mounting plate and the second mounting plate , one end of the connecting rod is fixedly connected to the first mounting plate, the other end of the connecting rod is fixedly connected to the second mounting plate, the driving device is fixedly installed on the outside of the first mounting plate, and the encoder is fixedly installed On the outside of the second mounting plate, one end of the transmission shaft passes through the first mounting plate and is fixedly connected to the output shaft of the drive device, and the other end of the transmission shaft passes through the second mounting plate and is connected to the input shaft of the encoder Fixedly connected, the first transmission gear and the second transmission gear are both fixedly installed on the transmission shaft and are both located between the first mounting plate and the second mounting plate, the first driving driving wheel, the second driving driving wheel, Both the first driven wheel and the second driven wheel are arranged on the upper part between the first mounting plate and the second mounting plate and are used to connect the front and rear distance regulating mechanism of the air outlet of the blower to the linear track in a walkable manner. The center line of the rotating shaft of the driving wheel, the center line of the rotating shaft of the second driving wheel, the center line of the rotating shaft of the first driven wheel and the center line of the rotating shaft of the second driven wheel are all located on the same horizontal plane. The two walking driving wheels are symmetrically arranged, the first driven wheel and the second driven wheel are symmetrically arranged, the first driving driving wheel is installed on the first mounting plate and can rotate relative to the first mounting plate, the second walking The driving wheel is mounted on the second mounting plate and can rotate relative to the second mounting plate, the first driven wheel is mounted on the first mounting plate and can rotate relative to the first mounting plate, and the second driven wheel is mounted on the On the second mounting plate and can rotate relative to the second mounting plate, the first transmission gear matches with the first driving driving wheel and can drive the first driving driving wheel to rotate, the second transmission gear and the second driving driving wheel The wheels match and can drive the second driving wheel to rotate.

The above-mentioned hydraulic dynamic control device for the wind field of fully mechanized excavation face is characterized in that: the front and rear distance control mechanism of the air outlet of the air cylinder also includes a first front and rear distance control limit switch and a second front and rear distance control limit switch, so The first front-rear distance control limit switch is fixedly installed on the outer front part of the first mounting plate, the second front-back distance control limit switch is fixedly installed on the outer front part of the second mounting plate, and the driving device is a hydraulic motor .

The above-mentioned hydraulic dynamic control device for the wind field of fully mechanized excavation face is characterized in that: the adjustable air cylinder device also includes a support frame, an air cylinder middle frame, a movable connection device, a first connecting shaft and a second connecting shaft. The upper end of the movable connection device is fixedly connected with the connecting rod, the lower end of the movable connection device is fixedly connected with the upper end of the support frame and the lower end of the movable connection device can rotate relative to the upper end of the movable connection device, and the support frame is set in the air duct The outer middle part of the frame and the middle frame of the air duct can rotate leftward, rightward, upward or downward relative to the support frame, the axis of the first connecting shaft and the axis of the second connecting shaft are located on the same straight line and the straight line is set horizontally , one end of the first connecting shaft is rotatably connected to the left middle part of the support frame, the other end of the first connecting shaft is rotatably connected to the left middle part of the middle frame of the air duct, and one end of the second connecting shaft is connected to the The right middle part of the support frame is then rotatably connected to the support frame, and the other end of the second connecting shaft is fixedly connected to the right middle part of the air duct middle frame;

The air outlet angle upward control mechanism of the air duct includes an upward oil cylinder, an upward limit switch and an upward encoder. The upward limit switch is fixedly installed on the bottom of the support frame. One end of the upward oil cylinder is connected to the The bottom of the support frame is hinged, and the other end of the lifting cylinder is hinged to the column at the lower part of the middle frame of the air duct and is used to control the rotation of the middle frame of the air duct along the axis of the first connecting shaft. The upward encoder is fixedly installed on the support frame In the middle part of the outer side, the input shaft of the tilt-up encoder is fixedly connected with one end of the second connecting shaft and is used to detect the rotation angle of the second connecting shaft.

The above-mentioned hydraulic dynamic control device for the wind field of fully mechanized excavation face is characterized in that: the movable connection device includes a fixed connection seat and a movable connection shaft, the upper end of the fixed connection seat is fixedly connected with the connecting rod, and the movable connection The upper end of the shaft is inserted into the lower end of the fixed connection seat and fixedly connected with the lower end of the fixed connection seat, and the lower end of the movable connection shaft passes through the upper part of the support frame and is rotatably connected with the support frame.

The above-mentioned hydraulic dynamic control device for the wind field of fully mechanized excavation face is characterized in that: the horizontal deflection control mechanism of the air outlet of the air duct includes a horizontal deflection cylinder, a connecting arm, a horizontal deflection limit switch and a horizontal deflection encoder, and the connecting arm One end of the arm is fixedly installed in the middle of the movable connection shaft, the other end of the connecting arm is hinged with one end of the horizontal deflection cylinder, the other end of the horizontal deflection cylinder is hinged with the upper outer side of the support frame, and the horizontal deflection limit switch is fixed Installed on the upper rear side of the support frame, the horizontal deflection limit switch is located below the connecting arm and can touch the connecting arm as the support frame deflects, and the horizontal deflection encoder is fixedly installed on the upper inner side of the support frame And the input shaft of the horizontal deflection encoder is fixedly connected with the lower end of the movable connection shaft.

The above-mentioned hydraulic dynamic control device for the wind field of fully mechanized excavation face is characterized in that: the adjustable air cylinder device also includes a blade and a blade fixed ring, one end of the blade is hinged on the blade fixed ring, and the blade of the blade The number is multiple and a plurality of said blades are stacked in turn to form an air outlet of the air duct whose diameter can be adjusted;

The regulating mechanism of the air outlet diameter of the air duct includes a linear push mechanism, a connecting seat and a connecting rod. One end of the linear pushing mechanism is connected to the connecting seat and can push the connecting seat to move forward and backward. One end of the connecting rod is hinged to the connecting seat. One end of the connecting seat is hinged to the inner side of the middle part of the blade, and the linear pushing mechanism is fixedly installed on the column in the middle part of the middle frame of the air duct.

The above-mentioned hydraulic dynamic control device for the wind field of comprehensive excavation face is characterized in that: one end of the blade is hinged on the blade fixed ring through a hinge, and the hinge includes a first hinge piece and a second hinge piece , the connecting ear and the connecting shaft, the first hinge is fixedly connected to the connecting ear, the second hinge is fixedly connected to the connecting shaft, both ends of the connecting shaft penetrate into the connecting ear and can be relatively The connecting ear is rotated, the first hinge is fixedly installed on the fixed ring of the blade, and the second hinge is fixedly installed in the middle of one end of the blade;

The caliber control mechanism of the air outlet of the air duct also includes a caliber control encoder, the caliber control encoder is fixedly mounted on the lower part of the middle frame of the air duct, and the input shaft of the caliber control encoder is fixedly connected to one end of the connecting shaft.

The above-mentioned hydraulic dynamic control device for the wind field of fully mechanized excavation face is characterized in that: the caliber control mechanism of the air outlet of the air duct also includes a caliber control limit switch, and the caliber control limit switch is fixedly installed on the middle frame of the air duct And the connecting rod contact of the caliber control limit switch is located on the moving path of the connecting seat.

The above-mentioned hydraulic dynamic control device for the wind field of fully mechanized excavation face is characterized in that: the input shaft of the caliber control encoder is fixedly connected to one end of the connecting shaft through a universal coupling, and the universal coupling is Steel wire universal coupling.

The above-mentioned hydraulic dynamic control device for the wind field of fully mechanized excavation face is characterized in that: the linear push mechanism includes an oil cylinder and a slide bar, and the length direction of the slide bar is set in the direction of the air outlet of the adjustable air cylinder device. The sliding rod is set inside the middle part of the middle frame of the blower, and both ends are fixed on the column of the middle frame of the blower. The connecting seat is set on the sliding rod and can slide back and forth along the sliding rod. On the column of the frame in the cylinder, the end of the piston rod of the oil cylinder is hinged to the bottom of the connecting seat and the piston rod of the oil cylinder can push the connecting seat to slide back and forth along the slide bar. The number of the connecting rods is multiple, and the connecting rod The number is equal to or less than the number of blades, and one end of a plurality of connecting rods is evenly distributed on the connecting seat.

Compared with the prior art, the present invention has the following advantages:

1. The structure of the present invention has high reliability, good stability, high transmission precision, and convenient installation; it can make the distribution of wind field, gas field, and dust field on the mechanized excavation face more scientific and reasonable, improve work efficiency, and realize energy saving and green ventilation.

2. Each action mechanism of the present invention is driven by hydraulic pressure, which improves the safety of the fully mechanized excavation face of the coal mine, and makes the power output more efficient and quicker, making the power source output mechanism more concise and efficient.

2. In the present invention, the rotary encoder is used to detect the angle and position of the front and rear distance control mechanism, the air cylinder angle upward mechanism, the air cylinder air outlet diameter adjustment mechanism, and the air cylinder horizontal deflection mechanism, and the output detection signal cooperates with the hydraulic control system to realize intelligent The closed-loop control of the control device can realize real-time control of the control mechanism at any angle and position through the closed-loop control system of the encoder, making the control of the whole device more accurate and flexible.

3. The present invention distributes the toothed active small wheels on both sides of the guide rail in the guide rail trolley, and realizes the power transmission through the gear pair composed of the active pinion and the toothed active small wheels, and drives the control device to move along the linear guide rail. The mechanism can achieve more efficient power output, smooth movement of the air duct, reasonable structure, and more convenient installation of power and detection components.

4. The components of the present invention adopt profiles, which make the overall weight lighter while meeting the requirements of component strength and rigidity, and the overall lightweight effect is higher. The air cylinder angle upward mechanism, the air cylinder air outlet diameter adjustment mechanism, and the air cylinder horizontal deflection mechanism adopt the plane linkage mechanism to transmit the movement and power. The linkage mechanism makes the movement and power transmission more efficient, and the structure is more stable and reliable. , lighter in weight.

The present invention will be described in further detail below with reference to the accompanying drawings and examples.

Description of drawings

Fig. 1 is a schematic diagram of the three-dimensional structure of the present invention.

Fig. 2 is a three-dimensional structural schematic diagram of the regulating mechanism for the front and rear distances of the air outlet of the blower according to the present invention.

Fig. 3 is a diagram of the installation relation position of some components of the front and rear distance control mechanism of the air duct air outlet of the present invention.

Fig. 4 is a right view showing the installation position relationship of some parts of the air outlet of the air duct according to the present invention.

Fig. 5 is a front view of Fig. 4 .

Fig. 6 is a schematic diagram of the installation relationship between the front and rear distance control mechanism and the movable connection device of the air duct air outlet of the present invention.

Fig. 7 is a three-dimensional structure schematic diagram of the installation relationship between some parts of the front and rear distance control mechanism of the air outlet of the air duct and the movable connection device of the present invention.

Fig. 8 is a perspective view of the installation position relationship of some components of the air outlet of the air duct according to the present invention.

Fig. 9 is a schematic diagram of the connection relationship between the hinge and the caliber control encoder of the present invention.

Explanation of reference signs:

1—straight line track; 2—control mechanism for the front and rear distance of the air outlet of the air duct;

2-1—driving device; 2-2—transmission shaft; 2-31—first transmission gear;

2-32—the second transmission gear; 2-41—the first driving wheel;

2-42—the second driving wheel; 2-51—the first driven wheel;

2-52—second driven wheel; 2-6—encoder; 2-71—first mounting plate;

2-72—the second mounting plate; 2-8—connecting rod;

2-91—the first front and rear distance control limit switch;

2-92—the second front and rear distance control limit switch;

3—The air outlet angle upward control mechanism of the air duct; 3-1—The upward oil cylinder;

3-2—upward limit switch; 3-3—upward encoder;

4—Air outlet caliber control mechanism; 4-1—Oil cylinder;

4-2—connecting seat; 4-3—caliber control limit switch;

4-4—sliding rod; 4-5—connecting rod;

4-6—caliber control encoder; 4-7—universal coupling;

5—the horizontal deflection control mechanism of the air outlet of the air duct; 5-1—the horizontal deflection cylinder;

5-2—connecting arm; 5-3—horizontal deflection limit switch;

5-4—horizontal deflection encoder; 6—support frame;

7—Middle frame of air duct; 8—Active connection device; 8-1—Fixed connection seat;

8-2—movable connection shaft; 9—first connection shaft; 10—second connection shaft;

11—blade fixed ring; 12—hinge; 12-1—first hinge piece;

12-2—the second hinge piece; 12-3—connecting ear; 12-4—connecting shaft;

13—leaf.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order and this sequence . It should be understood that the data so used may be interchanged under appropriate circumstances for the embodiments of the invention described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed rather, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

As shown in Figures 1 to 3, this embodiment provides a hydraulic dynamic control device for the wind field of fully mechanized excavation face, which includes a linear track 1 and an adjustable air cylinder device, and the adjustable air cylinder device is installed on the linear track 1, and the air outlet of the adjustable air cylinder device can move forward and backward along the linear track 1, and the adjustable air cylinder device includes the air cylinder air outlet front and rear distance control mechanism 2, the air cylinder air outlet angle upward adjustment mechanism 3, The diameter control mechanism 4 of the air outlet of the air cylinder and the horizontal deflection adjustment mechanism 5 of the air outlet of the air cylinder. The air outlet of the adjustable air cylinder device moves back and forth along the linear track 5, and the upward adjustment control mechanism 3 of the air outlet angle of the air cylinder is arranged at the air outlet of the adjustable air cylinder device and is used for adjusting and changing the adjustable Regulating the upward angle of the air outlet of the air cylinder device, the air outlet diameter regulating mechanism 4 is arranged at the air outlet of the adjustable air cylinder device and is used to adjust the caliber of the air outlet of the adjustable air cylinder device , the horizontal deflection control mechanism 5 of the air outlet of the air cylinder is arranged at the air outlet of the adjustable air cylinder device and is used to adjust the horizontal deflection angle of the air outlet of the adjustable air cylinder device;

The front and rear distance control mechanism 2 of the air outlet of the air duct includes a driving device 2-1, a transmission shaft 2-2, a first transmission gear 2-31, a second transmission gear 2-32, a first driving wheel 2-41, a Two walking driving wheels 2-42, the first driven wheel 2-51, the second driven wheel 2-52, encoder 2-6, the first mounting plate 2-71, the second mounting plate 2-72 and connecting rod 2- 8. Both the first mounting plate 2-71 and the second mounting plate 2-72 are arranged vertically, and the connecting rod 2-8 is arranged between the first mounting plate 2-71 and the second mounting plate 2-72 One end of the connecting rod 2-8 is fixedly connected to the first mounting plate 2-71, the other end of the connecting rod 2-8 is fixedly connected to the second mounting plate 2-72, and the driving device 2- 1 is fixedly installed on the outside of the first mounting plate 2-71, the encoder 2-6 is fixed on the outside of the second mounting plate 2-72, and one end of the transmission shaft 2-2 passes through the first mounting plate 2 After -71, it is fixedly connected with the output shaft of the driving device 2-1, and the other end of the transmission shaft 2-2 passes through the second mounting plate 2-72 and is fixedly connected with the input shaft of the encoder 2-6. A transmission gear 2-31 and a second transmission gear 2-32 are both fixedly installed on the transmission shaft 2-2 and are both located between the first mounting plate 2-71 and the second mounting plate 2-72, and the first walking drive Wheel 2-41, the second driving wheel 2-42, the first driven wheel 2-51 and the second driven wheel 2-52 are all arranged between the first mounting plate 2-7 and the second mounting plate 2-8. The upper part is used to connect the front and rear distance control mechanism 2 of the air duct air outlet to the linear track 1. The center line of the rotating shaft of the first driving driving wheel 2-41 and the center of the rotating shaft of the second driving driving wheel 2-42 line, the center line of the shaft of the first driven wheel 2-51 and the center line of the shaft of the second driven wheel 2-52 are located on the same horizontal plane and the first driving wheel 2-41 and the second driving wheel 2-42 are arranged symmetrically, The first driven wheel 2-51 is arranged symmetrically with the second driven wheel 2-52, and the first driving wheel 2-41 is mounted on the first mounting plate 2-71 and can rotate relative to the first mounting plate 2-71 , the second driving wheel 2-42 is mounted on the second mounting plate 2-72 and can rotate relative to the second mounting plate 2-72, and the first driven wheel 2-51 is mounted on the first mounting plate 2 -71 and can rotate relative to the first mounting plate 2-71, the second driven wheel 2-52 is mounted on the second mounting plate 2-72 and can rotate relative to the second mounting plate 2-72, said The first transmission gear 2-31 cooperates with the first driving wheel 2-41 and can drive the first driving wheel 2-41 to rotate, and the second transmission gear 2-32 is in phase with the second driving wheel 2-42. Cooperate and can drive the second driving wheel 2-42 to rotate.

As shown in Figure 2 and Figure 3, the front and rear distance control mechanism 2 of the air outlet of the air duct also includes a first front and rear distance control limit switch 2-91 and a second front and rear distance control limit switch 2-92, the first front and rear distance control limit switch 2-92. The front and rear distance control limit switch 2-91 is fixedly installed on the front part outside the first mounting plate 2-71, and the second front and rear distance control limit switch 2-92 is fixedly installed on the front part outside the second mounting plate 2-72. department.

In this embodiment, the driving device 2-1 is a hydraulic motor.

As shown in Fig. 1, Fig. 3, Fig. 4 and Fig. 5, the adjustable air duct device also includes a support frame 6, an air duct middle frame 7, a movable connection device 8, a first connecting shaft 9 and a second connecting shaft 10, The upper end of the movable connection device 8 is fixedly connected with the connecting rod 2-8, the lower end of the movable connection device 8 is fixedly connected with the upper end of the support frame 6 and the lower end of the movable connection device 8 can rotate relative to the upper end of the movable connection device 8 , the support frame 6 is sleeved in the middle part of the outside of the air cylinder frame 7 and the air cylinder frame 7 can rotate leftward, rightward, upward or downward relative to the support frame 6, the axis of the first connecting shaft 9 and the second The axes of the connecting shaft 10 are located on the same straight line and the straight line is arranged horizontally. One end of the first connecting shaft 9 is rotationally connected to the left middle part of the support frame 6, and the other end of the first connecting shaft 9 is connected to the middle frame 7 of the blower. The left middle part of the left side is rotationally connected, and one end of the second connecting shaft 10 is rotatably connected with the supporting frame 6 after passing through the right middle part of the supporting frame 6, and the other end of the second connecting shaft 10 is connected with the middle frame 7 of the air duct. The middle part of the right side is fixedly connected;

The angle upward control mechanism 3 of the air outlet of the air duct includes an upward oil cylinder 3-1, an upward limit switch 3-2 and an upward encoder 3-3, and the upward upward limit switch 3-2 is fixedly installed on At the bottom of the support frame 6, one end of the upward oil cylinder 3-1 is hinged with the bottom of the support frame 6, and the other end of the upward oil cylinder 3-1 is hinged with the column at the bottom of the air cylinder middle frame 7 and is used to control the air cylinder. The frame 7 rotates along the axis of the first connecting shaft 9, and the upward encoder 3-3 is fixedly installed on the outer middle part of the support frame 6, and the input shaft of the upward upward encoder 3-3 is connected to the second connecting shaft 10. One end is fixedly connected and used for detecting the rotation angle of the second connecting shaft 10 .

As shown in Figures 6 and 7, the movable connection device 8 includes a fixed connection base 8-1 and a movable connection shaft 8-2, and the upper end of the fixed connection base 8-1 is fixedly connected with the connecting rod 2-8, so The upper end of the movable connection shaft 8-2 is inserted into the lower end of the fixed connection seat 8-1 and is fixedly connected with the lower end of the fixed connection seat 8-1, and the lower end of the movable connection shaft 8-2 passes through the upper part of the support frame 6 and is connected with the lower end of the fixed connection seat 8-1. The support frame 6 is rotatably connected.

As shown in Figure 6 and Figure 7, the horizontal deflection control mechanism 5 of the air outlet of the air duct includes a horizontal deflection cylinder 5-1, a connecting arm 5-2, a horizontal deflection limit switch 5-3 and a horizontal deflection encoder 5-4, so One end of the connecting arm 5-2 is fixedly installed in the middle of the movable connecting shaft 8-2, and the other end of the connecting arm 5-2 is hinged with one end of the horizontal deflection cylinder 5-1, and the horizontal deflection cylinder 5-1 The other end is hinged with the upper outer side of the support frame 6, the horizontal deflection limit switch 5-3 is fixedly installed on the upper rear side of the support frame 6, and the horizontal deflection limit switch 5-3 is located below the connecting arm 5-2 And can touch with connecting arm 5-2 along with the deflection of support frame 6, described horizontal deflection encoder 5-4 is fixedly installed on the upper inner side of support frame 6 and the input shaft of horizontal deflection encoder 5-4 and movable The lower end of connecting shaft 8-2 is fixedly connected.

As shown in Figures 5 and 8, the adjustable air duct device also includes blades 13 and blade fixing rings 11, one end of the blades 13 is hinged on the blade fixing ring 11, and the number of the blades 13 is multiple and A plurality of blades 13 are stacked in turn to form an air outlet of the air duct whose diameter can be adjusted;

The air duct air outlet diameter regulating mechanism 4 includes a linear push mechanism, a connecting seat 4-2 and a connecting rod 4-5, one end of the linear pushing mechanism is connected to the connecting seat 4-2 and can push the connecting seat 4-2 back and forth Move, one end of the connecting rod 4-5 is hinged with the connecting seat 4-2, one end of the connecting seat 4-2 is hinged with the inner side of the middle part of the blade 13, and the linear pushing mechanism 4-1 is fixedly installed in the middle frame of the blower 7 on the pillar in the middle.

As shown in Figure 8 and Figure 9, one end of the blade 13 is hinged on the blade fixed ring 11 through the hinge 12, and the hinge 12 includes a first hinge piece 12-1, a second hinge piece 12-2 , the connecting ear 12-3 and the connecting shaft 12-4, the first hinge piece 12-1 is fixedly connected with the connecting ear 12-3, and the second hinge piece 12-2 is fixedly connected with the connecting shaft 12-4 , both ends of the connecting shaft 12-4 penetrate into the connecting ear 12-3 and can rotate relative to the connecting ear 12-3, the first hinge piece 12-1 is fixedly installed on the blade fixing ring 11, The second hinge piece 12-2 is fixedly installed in the middle of one end of the blade 13;

The air duct air outlet caliber control mechanism 4 also includes a caliber control encoder 4-6, and the caliber control encoder 4-6 is fixedly installed on the bottom of the air duct middle frame 7, and the input of the caliber control encoder 4-6 The shaft is fixedly connected with one end of the connecting shaft 12-4.

As shown in Figure 8, the air duct air outlet caliber control mechanism 4 also includes a caliber control limit switch 4-3, the caliber control limit switch 4-3 is fixedly installed on the air tube middle frame 7 and the caliber control limit switch 4-3 The connecting rod contact of the switch 4-3 is located on the moving path of the connecting seat 4-2.

In this embodiment, the input shaft of the caliber control encoder 4-6 is fixedly connected to one end of the connecting shaft 12-4 through a universal joint 4-7, and the universal joint 4-7 is a steel wire universal joint. to the coupling.

As shown in Figure 5 and Figure 8, the linear push mechanism includes an oil cylinder 4-1 and a slide bar 4-4, the length direction of the slide bar 4-4 is set in the direction of the air outlet of the adjustable blower device, and the slide bar 4-4 is The rod 4-4 is arranged inside the middle of the middle frame 7 of the fan and both ends are fixed on the column of the middle frame 7 of the fan. The connecting seat 4-2 is set on the slide bar 4-4 and can be moved 4-4 slides back and forth, the oil cylinder 4-1 is fixedly installed on the column of the air duct middle frame 7, the end of the piston rod of the oil cylinder 4-1 is hinged with the bottom of the connecting seat 4-2 and the piston of the oil cylinder 4-1 The rod can push the connecting seat 4-2 to slide back and forth along the slide bar 4-4, the number of the connecting rods 4-5 is multiple, the number of the connecting rods 4-5 is equal to or less than the number of the blades 13, and the number of One end of the connecting rod 4-5 is evenly distributed on the connecting seat 4-2.

The working principle of the present invention is: the dynamic control device for the wind field of the fully mechanized excavation face of the present invention can realize the adjustment of the front and rear position changes of the air cylinder, the adjustment of the horizontal deflection angle of the air cylinder, the adjustment of the upward deflection angle of the air cylinder, and the realization of the air cylinder. Adjustment for different calibers.

The wind field dynamic control device for fully mechanized excavation face of the present invention realizes the adjustment of the front and rear position changes of the air cylinder through the driving device 2-1 and the hydraulic motor to drive the transmission shaft 2-2, and the transmission shaft 2-2 drives the first transmission gear 2 on it. -31 and the second transmission gear 2-32, the first transmission gear 2-31 and the second transmission gear 2-32 drive the first driving wheel 2-41 and the second driving driving wheel 2-42 meshed with it respectively, One driving driving wheel 2-41 and the second driving driving wheel 2-42 rotate and move along the upper plane of the lower edge of the linear track 1, so that the front and rear distance control mechanism 2 of the air outlet of the entire air duct moves forward and backward along the linear track 1, thereby driving The air outlet of the air cylinder at the lower end of the adjustment mechanism 2 moves back and forth before and after the air outlet of the air cylinder. In the present invention, the first driven wheel 2-51, the second driven wheel 2-52 cooperate with the first transmission gear 2-31 and the second transmission gear 2-32 so that the front and rear distance control mechanism 2 of the blower air outlet is on the straight track 1 run more smoothly. The encoder 2-6 can monitor the rotation amount of the transmission shaft 2-2, and transmit the rotation amount of the transmission shaft 2-2 to the controller. Through the calculation of the controller, the front and rear distance control mechanism 2 of the air duct can be accurately controlled to move forward. or the distance to retreat.

The adjustment of the horizontal deflection angle of the air cylinder by the dynamic control device for the wind field of the fully mechanized excavation face of the present invention is to push the support frame 6 through the horizontal deflection cylinder 5-1, so that the support frame 6 drives the air outlet of the air cylinder to rotate relative to the upper end of the movable connection device 8 Realized, as shown in Figure 6. The horizontal deflection encoder 5-4 among the present invention is fixedly installed on the upper inner side of the support frame 6 and the input shaft of the horizontal deflection encoder 5-4 is fixedly connected with the lower end of the movable connection shaft 8-2, and the lower end of the movable connection shaft 8-2 The lower end is rotatably connected with the support frame 6, the upper end of the movable connection shaft 8-2 is fixedly connected with the fixed connection seat 8-1, the connecting arm 5-2 is fixedly connected with the movable connection shaft 8-2, and one end of the horizontal deflection cylinder 5-1 is It is connected with the connecting arm 5-2, so when the piston rod of the horizontal deflection cylinder 5-1 is stretched out, one end of the horizontal deflection cylinder 5-1 connected with the connecting arm 5-2 does not move, and the other end pushes the support frame 6 around the movable connection shaft The lower end of 8-2 rotates, and the support frame 6 drives the horizontal deflection encoder 5-4 installed on it to rotate, and the horizontal deflection encoder 5-4 transmits the monitored rotation information to the controller, and the controller controls the horizontal deflection through the hydraulic system The extension amount of the oil cylinder 5-1 realizes closed-loop control. The horizontal deflection limit switch 5-3 can play a role in protecting the equipment. If the placement angle is too large, the equipment will be damaged. When the deflection reaches a certain angle, the connecting arm 5-2 touches the horizontal deflection limit switch 5-3, and the horizontal deflection limit The switch 5-3 feeds back the signal to the hydraulic system, and the hydraulic system controls the horizontal deflection cylinder 5-1 to stop acting.

The wind field dynamic control device for fully mechanized excavation face of the present invention realizes the adjustment of the upward deflection angle of the air cylinder by pushing the upper cylinder 3-1 to push the middle frame 7 of the air cylinder to rotate around the first connecting shaft 9 and the second connecting shaft 10 of. The middle frame 7 of the blower is installed in the support frame 6 through the first connecting shaft 9 and the second connecting shaft 10 so as to be rotatable up and down. The rotation of the middle frame 7 of the blower is controlled by the lifting cylinder 3-1, and the turning of the middle frame 7 of the blower is controlled by the raising encoder 3-3. The rotation of the second connecting shaft 10 fixedly connected with the middle frame 7 of the fan cylinder is monitored to determine the elevation angle of the middle frame 7 of the fan cylinder. The tilt-up encoder 3-3 transmits the monitored tilt-up angle information to the controller, and the controller controls the tilt-up oil cylinder 3-1 through the hydraulic system to adjust the tilt-up angle of the air duct middle frame 7 according to the setting. The tilt-up limit switch 3-2 also serves to protect the equipment. When the tilt-up cylinder 3-1 pushes the middle frame 7 of the air duct to a certain angle, the casing outside the middle frame 7 of the air duct will touch the upper limit switch 3-2, the tilt-up limit switch 3-2 feeds back the signal to the hydraulic system, and the hydraulic system controls the tilt-up oil cylinder 3-1 to stop the action.

The wind field dynamic control device for fully mechanized excavation face of the present invention realizes the adjustment of different calibers of the air cylinder by pushing the connecting seat 4-2 through the oil cylinder 4-1, the connecting seat 4-2 drives the connecting rod 4-5, and the connecting rod 4-5 drives the blades 13 rotates along hinge 12, finally realizes the adjustment of blower caliber. The caliber control encoder 4-6 is connected with the connecting shaft 12-4 of the hinge 12 through the universal coupling 4-7, and the connecting shaft 12-4 is fixed with the second hinge piece 12-2, and the second hinge piece 12 -2 is fixed with the blade 13 again, so the rotation information of the blade 13 can be obtained by monitoring the rotation of the connecting shaft 12-4. The caliber control encoder 4-6 transmits the monitoring information to the controller, and the hydraulic system controls the oil cylinder 4-1 to form a closed-loop control. Caliber regulation and control limit switch 4-3 also is to play the effect of limit and protection equipment. When the connecting seat 4-2 moves to a certain position, the caliber control limit switch 4-3 can be touched, and the caliber control limit switch 4-3 feeds back a signal to the hydraulic system, and the hydraulic system controls the oil cylinder 4-1 to stop.

The controller in the present invention can be a PLC or a single-chip microcomputer.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any way. Any simple modifications, changes and equivalent structural transformations made to the above embodiments according to the technical essence of the present invention still belong to the technology of the present invention. within the scope of protection of the scheme.

Claims (10)

1. a kind of comprehensive pick face wind field fluid pressure type dynamic regulation device, which is characterized in that including rectilinear orbit (1) and controllable air duct Device, the controllable drum device is mounted on the lower section of rectilinear orbit (1) and the air outlet of controllable drum device can edge Rectilinear orbit (1) be moved forward and backward, the controllable drum device includes air duct air outlet longitudinal separation regulating and controlling mechanism (2), wind Face upward regulating and controlling mechanism (3), air duct air outlet bore regulating and controlling mechanism (4) and the air duct air outlet horizontal deflection of cylinder air outlet angle regulates and controls The air outlet of the controllable drum device and straight is arranged in mechanism (5), the air duct air outlet longitudinal separation regulating and controlling mechanism (2) It is described between trajectory (5) and for driving the air outlet of the controllable drum device to be moved forward and backward along rectilinear orbit (5) Air duct air outlet angle regulating and controlling mechanism (3) of facing upward is arranged at the air outlet of the controllable drum device and for adjusting and change Become the tilt angle of controllable drum device air outlet, the air duct air outlet bore regulating and controlling mechanism (4) is arranged described adjustable Control the caliber size at the air outlet of drum device and for adjusting the controllable drum device air outlet, the air duct outlet air Mouth horizontal deflection regulating and controlling mechanism (5) is arranged at the air outlet of the controllable drum device and for adjusting the controllable wind Wound packages sets the size of air outlet X deflection angle；

The air duct air outlet longitudinal separation regulating and controlling mechanism (2) includes driving device (2-1), transmission shaft (2-2), the first driving cog Take turns (2-31), the second transmission gear (2-32), the first walking driver gear (2-41), the second walking driver gear (2-42), first from Driving wheel (2-51), the second driven wheel (2-52), encoder (2-6), the first mounting plate (2-71), the second mounting plate (2-72) and company Extension bar (2-8), first mounting plate (2-71) and the second mounting plate (2-72) are vertically arranged, and the connecting rod (2-8) sets Set the lower part between the first mounting plate (2-71) and the second mounting plate (2-72), one end and first of the connecting rod (2-8) Mounting plate (2-71) is fixedly connected, and the other end of the connecting rod (2-8) is fixedly connected with the second mounting plate (2-72), the drive Dynamic device (2-1) is fixedly mounted on the outside of the first mounting plate (2-71), and the encoder (2-6) is fixedly mounted on the second installation The outside of plate (2-72), it is defeated with driving device (2-1) afterwards that one end of the transmission shaft (2-2) passes through the first mounting plate (2-71) Shaft is fixedly connected, and the other end of the transmission shaft (2-2) passes through the second mounting plate (2-72) input with encoder (2-6) afterwards Shaft is fixedly connected, and first transmission gear (2-31) and the second transmission gear (2-32) are fixedly mounted on transmission shaft (2- 2) it on and is respectively positioned between the first mounting plate (2-71) and the second mounting plate (2-72), first walking driver gear (2-41), Second walking driver gear (2-42), the first driven wheel (2-51) and the second driven wheel (2-52) are arranged at the first mounting plate (2- 7) top between the second mounting plate (2-8) and the company for air duct air outlet longitudinal separation regulating and controlling mechanism (2) can to walk It connects on rectilinear orbit (1), the shaft centerline of first walking driver gear (2-41), the second walking driver gear (2-42) The shaft centerline of shaft centerline, the shaft centerline of the first driven wheel (2-51) and the second driven wheel (2-52) is respectively positioned on together On one horizontal plane, first walking driver gear (2-41) and the second walking driver gear (2-42) are symmetrical arranged, described first from Driving wheel (2-51) and the second driven wheel (2-52) are symmetrical arranged, and first walking driver gear (2-41) is mounted on the first mounting plate It can rotate on (2-71) and relative to the first mounting plate (2-71), second walking driver gear (2-42) is mounted on the second peace It can rotate in loading board (2-72) and relative to the second mounting plate (2-72), first driven wheel (2-51) is mounted on the first peace It can rotate in loading board (2-71) and relative to the first mounting plate (2-71), second driven wheel (2-52) is mounted on the second peace It can rotate in loading board (2-72) and relative to the second mounting plate (2-72), first transmission gear (2-31) and the first walking Driving wheel (2-41) match and be able to drive the first walking driver gear (2-41) rotation, second transmission gear (2-32) with Second walking driver gear (2-42) matches and is able to drive the second walking driver gear (2-42) rotation.

2. a kind of comprehensive pick face wind field fluid pressure type dynamic regulation device described in accordance with the claim 1, it is characterised in that: the air duct Air outlet longitudinal separation regulating and controlling mechanism (2) further includes the first longitudinal separation regulation limit switch (2-91) and the second longitudinal separation tune It controls limit switch (2-92), the first longitudinal separation regulation limit switch (2-91) is fixedly mounted on the first mounting plate (2-71) Exterior front, second longitudinal separation regulation limit switch (2-92) is fixedly mounted on the outside of the second mounting plate (2-72) Front, the driving device (2-1) are hydraulic motor.

3. a kind of comprehensive pick face wind field fluid pressure type dynamic regulation device described in accordance with the claim 1, it is characterised in that: described adjustable Control drum device further includes support frame (6), air duct center (7), articulating device (8), the first connecting shaft (9) and the second connection The upper end of axis (10), the articulating device (8) is fixedly connected with connecting rod (2-8), under the articulating device (8) End is fixedly connected with the upper end of support frame (6) and the lower end of articulating device (8) can be relative to articulating device (8) Upper end rotation, support frame as described above (6) is sleeved on the outer middle side part of air duct center (7) and air duct center (7) can be relative to support Frame (6) rotates to the left, to the right, upward or downward, and the axis of first connecting shaft (9) and the axis of the second connecting shaft (10) are equal It is located along the same line and the straight horizontal is arranged, one end of first connecting shaft (9) and the left side central portion of support frame (6) turn Dynamic connection, the other end of first connecting shaft (9) and the left side central portion of air duct center (7) are rotatablely connected, second connection One end of axis (10) is rotatablely connected with after the right side central for passing through support frame (6) with support frame (6), second connecting shaft (10) The other end be fixedly connected with the right side central of air duct center (7)；

The air duct air outlet angle face upward regulating and controlling mechanism (3) include face upward oil cylinder (3-1), limit switch of facing upward (3-2) and upper It faces upward encoder (3-3), the limit switch of facing upward (3-2) is fixedly mounted on the bottom of support frame (6), the oil cylinder (3- that faces upward 1) bottom of one end and support frame (6) is hinged, the other end of the oil cylinder of facing upward (3-1) and standing for air duct center (7) lower part Column articulated and rotate for controlling air duct center (7) along the axis of the first connecting shaft (9), the encoder of facing upward (3-3) is solid Dingan County is mounted in support frame (6) outer middle side part, and the input shaft of the encoder of facing upward (3-3) and one end of the second connecting shaft (10) are solid Fixed connection and the angle for detecting the second connecting shaft (10) rotation.

4. a kind of comprehensive pick face wind field fluid pressure type dynamic regulation device described in accordance with the claim 3, it is characterised in that: the activity Attachment device (8) includes fixed connecting base (8-1) and is flexibly connected axis (8-2), the upper end of the fixed connecting base (8-1) and company Extension bar (2-8) is fixedly connected, it is described be flexibly connected axis (8-2) upper end insertion fixed connecting base (8-1) lower end and with fixation The lower end of attachment base (8-1) is fixedly connected, it is described be flexibly connected axis (8-2) lower end pass through support frame (6) top and with branch Support (6) rotation connection.

5. a kind of comprehensive pick face wind field fluid pressure type dynamic regulation device according to claim 4, it is characterised in that: air duct outlet air Mouth horizontal deflection regulating and controlling mechanism (5) includes horizontal deflection oil cylinder (5-1), linking arm (5-2), horizontal deflection limit switch (5-3) With horizontal deflection encoder (5-4), one end of the linking arm (5-2) is fixedly mounted on the middle part for being flexibly connected axis (8-2), institute The one end for stating the other end and horizontal deflection oil cylinder (5-1) of linking arm (5-2) is hinged, the horizontal deflection oil cylinder (5-1) it is another The upper outside of one end and support frame (6) is hinged, and the horizontal deflection limit switch (5-3) is fixedly mounted on support frame (6) On rear side of top, the horizontal deflection limit switch (5-3) is located at the lower section of linking arm (5-2) and can be with support frame (6) Deflection is mutually touched with linking arm (5-2), and the horizontal deflection encoder (5-4) is fixedly mounted on the upper inner of support frame (6) And the input shaft of horizontal deflection encoder (5-4) is fixedly connected with the lower end for being flexibly connected axis (8-2).

6. being filled according to a kind of comprehensive pick face wind field fluid pressure type dynamic regulation described in any one of claim 1-5 claim It sets, it is characterised in that: the controllable drum device further includes blade (13) and blade retainer plate (11), the blade (13) One end is hinged on blade retainer plate (11), and the quantity of the blade (13) is multiple and multiple blades (13) successively stack Form the air duct air outlet of adjustable caliber size；

The air duct air outlet bore regulating and controlling mechanism (4) includes linear pushing mechanism, attachment base (4-2) and connecting rod (4-5), described One end of linear pushing mechanism connect with attachment base (4-2) and attachment base (4-2) can be pushed to be moved forward and backward, the connecting rod (4- 5) hingedly with attachment base (4-2), one end of the attachment base (4-2) and the inside middle portion of blade (13) are hinged, described for one end Linear pushing mechanism (4-1) is fixedly mounted on the column in the middle part of air duct center (7).

7. a kind of comprehensive pick face wind field fluid pressure type dynamic regulation device according to claim 6, it is characterised in that: the blade (13) one end is hinged on blade retainer plate (11) by hinge (12), and the hinge (12) includes the first leaf of hinge (12- 1), the second leaf of hinge (12-2), engaging lug (12-3) and connecting shaft (12-4), first leaf of hinge (12-1) and engaging lug (12-3) is fixedly connected, and second leaf of hinge (12-2) is fixedly connected with connecting shaft (12-4), the connecting shaft (12-4) Both ends penetrate in engaging lug (12-3) and can rotate relative to engaging lug (12-3), the fixed peace of first leaf of hinge (12-1) On blade retainer plate (11), second leaf of hinge (12-2) is fixedly mounted in the middle part of one end of blade (13)；

The air duct air outlet bore regulating and controlling mechanism (4) further includes bore regulation encoder (4-6), and the bore regulates and controls encoder (4-6) is fixedly mounted on the lower part of air duct center (7), the input shaft and connecting shaft (12- of bore regulation encoder (4-6) 4) one end is fixedly connected.

8. a kind of comprehensive pick face wind field fluid pressure type dynamic regulation device according to claim 7, it is characterised in that: the air duct Air outlet bore regulating and controlling mechanism (4) further includes bore regulation limit switch (4-3), and bore regulation limit switch (4-3) is solid Dingan County is on air duct center (7) and the connecting rod contact of bore regulation limit switch (4-3) is located at the mobile road of attachment base (4-2) On diameter.

9. according to a kind of comprehensive pick face wind field fluid pressure type dynamic regulation device described in claim 7 or 8, it is characterised in that: described The input shaft of bore regulation encoder (4-6) is fixedly connected by Hooks coupling universal coupling (4-7) with one end of connecting shaft (12-4), institute Stating Hooks coupling universal coupling (4-7) is steel wire Hooks coupling universal coupling.

10. according to a kind of comprehensive pick face wind field fluid pressure type dynamic regulation device described in claim 6 or 7, it is characterised in that: described Linear pushing mechanism includes oil cylinder (4-1) and slide bar (4-4), and slide bar (4-4) length direction is directed toward controllable drum device The direction of air outlet is arranged, slide bar (4-4) setting air duct center (7) inside middle portion and two ends be each attached to wind On the column of cylinder center (7), the attachment base (4-2) is sleeved on slide bar (4-4) and can slide back and forth along slide bar (4-4) Dynamic, the oil cylinder (4-1) is fixedly mounted on the column of air duct center (7), the piston rod end of the oil cylinder (4-1) and connection The bottom of seat (4-2) is hingedly and the piston rod of oil cylinder (4-1) can push attachment base (4-2) to slidably reciprocate along slide bar (4-4), The quantity of the connecting rod (4-5) be it is multiple, the quantity of the connecting rod (4-5) is equal to or less than the quantity of blade (13), multiple One end of the connecting rod (4-5) is evenly distributed on attachment base (4-2).