CN215355923U

CN215355923U - Cutting machine head frame and electric hydraulic cutting machine

Info

Publication number: CN215355923U
Application number: CN202121113239.1U
Authority: CN
Inventors: 彭亚民; 陆天燚; ***; 王俊; 孙益松
Original assignee: European Shield Technology Co ltd
Current assignee: European Shield Technology Co ltd
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2021-12-31
Anticipated expiration: 2031-05-21

Abstract

The utility model provides a cutter head frame, which comprises a head frame, a cutter shaft, a movable blade and a fixed blade. The headstock comprises a connecting part and a headstock body, the connecting part is connected to an oil cylinder of the cutting machine, a shaft hole is formed in the connecting part, the headstock body is arranged on the connecting part, and a placing groove for placing a workpiece and a shaft hole of the placing groove and the connecting part are formed in the headstock body and communicated with each other. The cutter shaft is arranged in a shaft hole on the connecting part and extends into an oil cylinder of the cutting machine. The movable blade is connected to the tail end of the cutter shaft and moves along with the cutter shaft. The fixed blade and the movable blade are oppositely arranged in the placing groove; the structure of fixed blade is the same with the structure of activity blade, all includes the blade body of cube shape and the cutting edge portion that forms in blade body front end, and cutting edge portion includes all extends to the both sides of cutting edge body to the circular arc curved surface section of blade body place one side concave yield and the both sides of circular arc curved surface section.

Description

Cutting machine head frame and electric hydraulic cutting machine

Technical Field

The utility model relates to the field of electro-hydraulic pressure, in particular to a cutter head frame and an electro-hydraulic cutter.

Background

The steel bar cutting machine is a tool used for cutting steel bars, is widely applied to cutting steel bars in fixed length in civil engineering and cutting steel bars in concrete buildings in forcible entry rescue, and is essential equipment for engineering construction and rescue. Traditional bar cutter is mostly split type large-scale cutting equipment, and not only weight is heavy and the volume is very huge, carries inconveniently and can't be applicable to the less rescue occasion in space.

In order to solve the problem, small-sized and handheld electric hydraulic steel bar cutting machines with integrated structures are available on the market at present. The hydraulic assembly drives the cutter shaft connected with the cutter blade to reciprocate, so that the workpiece on the cutter frame is sheared. The existing blade is a three-dimensional mechanism, the cutting edge of the existing blade is a plane type, and most of workpieces sheared by the cutter during working are cylindrical reinforcing steel bars. During shearing, the contact area between the plane type blade and the cylindrical steel bar is very small and is close to line contact. This causes uneven stress at the broken portion of the reinforcing bar during cutting, resulting in an uneven cut section. Similarly, because the contact area between the blade and the workpiece is small, when the workpiece is not placed in place, the blade edge surface is stressed unevenly in the thickness direction, so that the blade is expanded, the blade is extremely easy to damage, the service life of the blade is short, the blade needs to be replaced frequently, and the cost of the cutting machine is greatly increased. Furthermore, uneven stress on the blade can also cause deformation of the cutter shaft, which is easy to cause danger.

SUMMERY OF THE UTILITY MODEL

The utility model provides a cutter head frame and an electric hydraulic cutter which can increase the contact area between a blade and a workpiece during cutting to prolong the service life of the blade in order to overcome the defects of the prior art.

To achieve the above objects, the present invention provides a cutter head including a head, a blade shaft, a movable blade, and a fixed blade. The headstock comprises a connecting part and a headstock body, the connecting part is connected to an oil cylinder of the cutting machine, a shaft hole is formed in the connecting part, the headstock body is arranged on the connecting part, and a placing groove for placing a workpiece and a shaft hole of the placing groove and the connecting part are formed in the headstock body and communicated with each other. The cutter shaft is arranged in a shaft hole in the connecting part and extends into the oil cylinder of the cutting machine, and the cutter shaft reciprocates along the shaft hole under the action of oil in the oil cylinder. The movable blade is connected to the tail end of the cutter shaft and moves along with the cutter shaft. The fixed blade and the movable blade are oppositely arranged in the placing groove; the fixed blade is the same as the movable blade in structure and comprises a cubic blade body and a blade part formed at the front end of the blade body, wherein the blade part comprises an arc curved surface section which is recessed towards one side of the blade body, and two sides of the arc curved surface section extend to two sides of the blade body; when cutting, the arc curved surface section of the movable blade and the arc curved surface section of the fixed blade respectively act on two sides of the workpiece.

According to an embodiment of the present invention, the blade portion further includes two plane sections formed at both ends of the arc curved section, the two plane sections are front end surfaces of the blade body, and the height of the two plane sections is smaller than the height of the arc curved section.

According to an embodiment of the utility model, the height of the circular arc curved surface section is equal to 3/4 of the blade body in the height direction of the blade body.

According to an embodiment of the present invention, the maximum distance of the recess of the circular arc curved surface section in the length direction of the insert body is equal to 1/10 of the length of the insert body.

According to an embodiment of the present invention, an L-shaped mounting groove is formed at a side of the end of the cutter shaft close to the opening of the placement groove, the movable blade is detachably connected to an axial side wall of the L-shaped mounting groove, and a bottom end of the blade body abuts against a radial side wall of the L-shaped mounting groove.

According to an embodiment of the present invention, each blade body has at least two fixing holes arranged along the height direction, and at least two fixing members detachably penetrate through the corresponding fixing holes to fix the blade in the side wall of the placing groove on the arbor or the headstock body.

According to one embodiment of the utility model, a movable distance is arranged between the bottom end of the movable blade and the placing groove; or the bottom of the placing groove is provided with a guide rail at a position opposite to the movable blade, the length of the guide rail is greater than the movement stroke of the movable blade, and the bottom end of the movable blade is positioned in the guide rail and reciprocates along the guide rail.

According to an embodiment of the present invention, the cutting-off machine head frame further includes an adjusting lug having an adjusting hole, and an adjusting screw threadedly connected in the adjusting hole, wherein the adjusting screw adjusts an axial length of the opening of the accommodating groove.

Correspondingly, the utility model also provides an electric hydraulic cutting machine which comprises a motor assembly, a pump body assembly, an oil cylinder and the cutting headstock which are sequentially connected, wherein the connecting part of the headstock is connected with the oil cylinder, and a cutter shaft extends into the oil cylinder and drives a movable blade to reciprocate under the action of oil in the oil cylinder to cut off a workpiece positioned in the accommodating groove.

According to an embodiment of the utility model, the electro-hydraulic cutter further comprises a handle arranged outside the cylinder and the pump body assembly.

In summary, in the cutting-off headstock and the electro-hydraulic cutting-off machine provided by the utility model, the cutter shaft drives the movable blade to reciprocate, and the movable blade and the fixed blade interact with each other to cut off the workpiece located in the accommodating groove. The blade parts of the movable blade and the fixed blade are provided with the arc curved surface section which is concave towards one side of the blade body, when the movable blade and the fixed blade are cut off, the contact area of the blade and a workpiece is greatly increased due to the arc curved surface section, when the movable blade and the fixed blade are cut off, the workpiece is evenly stressed on the contact surface of the movable blade and the fixed blade to be cut off, so that the cut-off surface is very neat, and the follow-up processing of the cut-off workpiece is greatly facilitated.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic structural diagram of a cutting head frame according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of fig. 1 from another view angle.

Fig. 3 is an enlarged schematic view of a portion a in fig. 1.

Fig. 4 is a schematic view showing the structure of the cutting head frame shown in fig. 1 connected to the cylinder.

Fig. 5 is a schematic structural diagram of fig. 4 from another view angle.

Fig. 6 is a schematic structural diagram of a head frame body in a cutting head frame according to another embodiment of the present invention.

FIG. 7 is a schematic structural view of an electrohydraulic cutter according to an embodiment of the present invention.

Detailed Description

As shown in fig. 1-5, the present embodiment provides a cutter head 40, which includes a head 1, a blade shaft 2, a movable blade 3, and a fixed blade 4. The headstock 1 comprises a connecting part 11 and a headstock body 12, the connecting part 11 is connected to an oil cylinder 30 of the cutting machine, a shaft hole is formed in the connecting part 11, the headstock body 12 is arranged on the connecting part 11, a placing groove 121 for placing a workpiece is formed in the headstock body 12, and the placing groove 121 is communicated with the shaft hole of the connecting part 11. The cutter shaft 2 is arranged in a shaft hole on the connecting part 11 and extends into an oil cylinder 30 of the cutting machine, and reciprocates along the shaft hole under the action of oil in the oil cylinder 30. The movable blade 3 is connected to the end of the arbor 2 and follows the movement of the arbor 2. The fixed blade 4 is arranged in the placing groove 121 opposite to the movable blade 3; the structure of the fixed blade 4 is the same as that of the movable blade 3, and the fixed blade 4 includes a cubic blade body 31 and a blade part 32 formed at the front end of the blade body 31, the blade part 32 includes an arc curved section 321 recessed to one side of the blade body 31, and both sides of the arc curved section 321 extend to both sides of the blade body 31; when cutting, the arc curved surface section of the movable blade 3 and the arc curved surface section of the fixed blade 4 respectively act on two sides of the workpiece.

When cutting off, the arc curved surface sections 321 on the movable blade 3 and the fixed blade 4 are respectively abutted against and wrap the surface of a cylindrical workpiece, and the two arc curved surface sections 321 are in surface contact with the workpiece. Compared with the traditional line contact between a plane cutting edge and a workpiece, the arrangement of the arc curved surface section 321 greatly increases the contact area between the movable blade 3 and the fixed blade 4 and the cylindrical workpiece during cutting, and the area on the contact surface of the workpiece is uniformly stressed to be cut off, so that the cut surface is very neat. Further, at the initial moment of cutting, the arc curved surface sections 321 on the movable blade 3 and the fixed blade 4 respectively coat two sides of the workpiece and gradually clamp the workpiece, and the wrapping surface contact provided by the arc curved surface sections 321 can gradually adjust the workpiece which is not placed in place in the process, so that the damage of the blade or the deformation of the cutter shaft caused by the fact that the workpiece is not placed in place is effectively avoided.

In order to improve the stability of the blade, in this embodiment, the blade portion 32 further includes two planar sections 322 formed at two ends 321 of the arc-shaped curved section, and the two planar sections 322 are the front end surface of the blade body 31 and the height of the two planar sections 322 is smaller than the height of the arc-shaped curved section 321. The two plane sections 322 strengthen the strength of the two ends of the movable blade 3 and the fixed blade 4, and avoid the problem of the fragmentation of the end parts of the blades. Preferably, in the height direction of the blade body 31, 3/4 that the height of the arc curved section 321 is equal to the height of the blade body 31; in the length direction of the blade body 31, the maximum distance of the recess of the circular arc curved section 321 is equal to 1/10 of the length of the blade body 31. However, the present invention is not limited thereto. In other embodiments, the parameters of the arc surface segment can be adjusted according to the diameter and the shape of the workpiece.

In this embodiment, as shown in fig. 1, an L-shaped mounting groove is formed at a side of the end of the cutter shaft 2 close to the opening of the placing groove 121, the movable blade 3 is detachably connected to an axial side wall of the L-shaped mounting groove, and a bottom end of the blade body 31 abuts against a radial side wall of the L-shaped mounting groove. When cutting off, the axial side wall of L type mounting groove supports movable blade 3, especially when the work piece is put not in place, radial force that the axial side wall received on with movable blade 3 disperses to arbor 2 on, avoids the excessive concentrated problem that appears the blade damage of atress on the movable blade 3, improves the life of blade. Also, the side walls of the placement groove 121 transmit and disperse the force in the radial direction received by the fixed blade 4 to the entire tool holder body 12, thereby avoiding stress concentration.

In the present embodiment, each blade body 31 has two fixing holes arranged along the height direction, and two fixing members 33 detachably penetrate the corresponding fixing holes to fix the blade body 31 in the side wall of the placing groove 121 on the arbor 2 or the headstock body 12. The two fixing holes arranged along the height direction ensure that the blade is stably connected with the cutter shaft or the headstock body in the height direction, so that the workpiece can be uniformly stressed on the cut surface during cutting. However, the number of the fixing holes is not limited in the present invention.

In this embodiment, a movable distance is provided between the bottom end of the movable blade 3 and the bottom of the placing groove 121, so as to avoid interference between the movable blade 3 and the bottom of the placing groove 121 when the movable blade 3 moves along with the knife shaft 2. However, the present invention is not limited thereto. In other embodiments, as shown in fig. 6, there may be a guide rail 120 'at the bottom of the placement groove opposite to the movable blade, the length of the guide rail 120' is greater than the moving stroke of the movable blade, and the bottom end of the movable blade is located in the guide rail and reciprocates along the guide rail.

In this embodiment, an adjusting lug 13 is further disposed on one side of the head frame body 12, the adjusting lug 13 has an adjusting hole, and an adjusting screw 14 for adjusting the axial length of the opening of the accommodating groove 121 is disposed in the adjusting hole. In the work piece of different diameters or thickness, the user can rotate the adjusting screw and adjust storage tank open-ended axial length to make the work piece can just block in the card goes into storage tank 121 and can not take place to incline or rock, thereby make things convenient for the work piece processing.

Correspondingly, as shown in fig. 4 and 7, the present invention further provides an electro-hydraulic cutting machine, which includes a motor assembly 10, a pump assembly 20, an oil cylinder 30, and the cutting headstock 40, which are connected in sequence, wherein the connecting portion 11 of the headstock 1 is detachably connected to the oil cylinder 30, and the cutter shaft 2 extends into the oil cylinder 40 and drives the movable blade 3 to reciprocate under the action of oil in the oil cylinder 30, so as to cut off the workpiece located in the accommodating groove 121. For convenience of hand holding, in the present embodiment, the electro-hydraulic cutter further includes a handle 50 disposed outside the cylinder 30 and the pump body assembly 30.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A cutter head frame, comprising:

the headstock comprises a connecting part and a headstock body, the connecting part is connected to an oil cylinder of the cutting machine, a shaft hole is formed in the connecting part, the headstock body is arranged on the connecting part, a placing groove for placing a workpiece is formed in the headstock body, and the placing groove is communicated with the shaft hole of the connecting part;

the cutter shaft is arranged in the shaft hole on the connecting part, extends into the oil cylinder of the cutting machine and reciprocates along the shaft hole under the action of oil in the oil cylinder;

the movable blade is connected to the tail end of the cutter shaft and moves along with the cutter shaft;

the fixed blade is arranged in the placing groove opposite to the movable blade; the fixed blade is the same as the movable blade in structure and comprises a cubic blade body and a blade part formed at the front end of the blade body, wherein the blade part comprises an arc curved surface section which is recessed towards one side of the blade body, and two sides of the arc curved surface section extend to two sides of the blade body; when cutting, the arc curved surface section of the movable blade and the arc curved surface section of the fixed blade respectively act on two sides of the workpiece.

2. A cutter head frame according to claim 1 wherein said blade portion further comprises two planar sections formed at both ends of the curved section, the two planar sections being the front end surface of the blade body and the height of the two planar sections being less than the height of the curved section.

3. A cutter head frame as claimed in claim 2 wherein the height of the curved segment is equal to 3/4 of the height of the blade body in the direction of the height of the blade body.

4. A cutter head according to claim 1 wherein the maximum distance of concavity of said radiused curved section in the direction of the length of the blade body is equal to 1/10 of the length of the blade body.

5. The bit rack of claim 1, wherein the end of the knife shaft has an L-shaped mounting groove on a side thereof adjacent to the opening of the placement groove, the movable blade is detachably connected to an axial side wall of the L-shaped mounting groove, and the bottom end of the blade body abuts against a radial side wall of the L-shaped mounting groove.

6. A cutter head frame according to claim 1, wherein each blade body has at least two fixing holes arranged in the height direction, and at least two fixing members detachably penetrate the corresponding fixing holes to fix the blade in the side wall of the placing groove on the cutter shaft or the head frame body.

7. The cutter head frame of claim 1, wherein there is a movable spacing between the bottom end of the movable blade and the placement slot; or the bottom of the placing groove is provided with a guide rail at a position opposite to the movable blade, the length of the guide rail is greater than the movement stroke of the movable blade, and the bottom end of the movable blade is positioned in the guide rail and reciprocates along the guide rail.

8. A cutter head frame according to claim 1, wherein one side of the head frame body is further provided with an adjustment lug having an adjustment hole thereon, the cutter head frame further comprising an adjustment screw threadedly connected in the adjustment hole, the adjustment screw adjusting the axial length at the opening of the receiving groove.

9. An electric hydraulic cutting machine is characterized by comprising a motor assembly, a pump body assembly, an oil cylinder and a cutting machine headstock according to any one of claims 1 to 8 which are sequentially connected, wherein the connecting part of the headstock is connected with the oil cylinder, and a cutter shaft extends into the oil cylinder and drives a movable blade to reciprocate under the action of oil in the oil cylinder to cut off a workpiece positioned in a containing groove.

10. The electro-hydraulic cutter of claim 9 further including a handle disposed outside the cylinder and pump body assembly.