CN106625422B - Electric cutting and expanding device - Google Patents

Abstract

The invention provides an electric shearing and expanding device, which comprises a shearing and expanding working head, a hydraulic driving component, a reversing component and an oil inlet component. The shearing and expanding working head includes two intersecting and movably connected shearing and expanding pieces, each of which has a cutting edge on the inner side and an expanding portion on the outer side. The hydraulic drive assembly is connected to the shearing and expanding working head, and drives the two shearing and expanding parts to open or close. The reversing assembly is connected with the hydraulic drive assembly, and provides two opposite directions of oil circuit circulation to the hydraulic drive assembly. The oil inlet assembly is connected with the reversing assembly.

Description

electric clipper

technical field

The invention relates to the technical field of disaster relief equipment, and in particular to an electric clipper.

Background technique

Hydraulic shear and expander is a rescue and demolition tool, which is used in natural disasters such as vehicle accidents, house collapses, fire scenes or earthquakes. , to rescue victims trapped in dangerous environments, and can be equipped with fire brigade, armed police force, expressway rapid response rescue team. The oil circuit in the existing hydraulic shear expander can only circulate in one direction after entering the hydraulic cylinder, that is, it can only drive the piston to move forward, and the backward movement of the piston can only be realized after the oil is drained manually, which is very inconvenient for users to use and work. Very inefficient.

In addition, the hydraulic shears currently on the market that are powered by external power sources are medium and heavy-duty hydraulic demolition equipment, and they are heavy, which is not conducive to long-distance load handling and rescue implementation of demolition in extremely complex and narrow spaces. .

SUMMARY OF THE INVENTION

In order to overcome the deficiencies of the prior art, the present invention provides an electric clipper.

In order to achieve the above purpose, the present invention provides an electric shearing and expanding device, which includes a shearing and expanding working head, a hydraulic drive assembly, a reversing assembly and an oil inlet assembly. The shearing and expanding working head includes two intersecting and movably connected shearing and expanding pieces, each of which has a cutting edge on the inner side and an expanding portion on the outer side. The hydraulic drive assembly is connected with the shearing and expanding working head, and drives the two shearing and expanding parts to open or close. The reversing assembly is connected with the hydraulic drive assembly, and provides two oil circuit circulations in opposite directions to the hydraulic drive assembly. The oil inlet assembly is connected with the reversing assembly.

In an embodiment of the present invention, the shearing edge has a plurality of tooth gaps, and the width of the tooth gap gradually becomes thinner from the root to the end of the shearing edge.

In an embodiment of the present invention, each shearing and expanding member further has at least one traction hole for matching the traction chain during expansion.

In an embodiment of the present invention, the reversing assembly includes a reversing body and a reversing control. The reversing body includes a conversion base, and the conversion base is provided with a fluid inlet hole, a fluid outlet hole, a first connection hole and a second connection hole, the fluid inlet hole is connected with the oil inlet component, and the first connection hole and the second connection hole are connected with the hydraulic pressure. The drive components are connected. The conversion control is connected with the conversion base, and the conversion control is provided with a first connection pipe, a second connection pipe and a third connection pipe.

At the first station, both ends of the second connecting pipe are connected with the fluid inlet hole and the fluid outlet hole, the fluid circulates between the fluid inlet hole and the fluid outlet hole through the second connecting pipe, and the fluid does not enter the hydraulic drive assembly;

In the second station, the two ends of the first connecting pipe are respectively connected with the first connecting hole and the fluid outlet hole, and the two ends of the third connecting pipe are respectively connected with the second connecting hole and the fluid inlet hole. The three connecting pipes flow into the first cavity in the hydraulic drive assembly from the second connecting hole, and the fluid in the second cavity of the hydraulic drive assembly flows out from the fluid outlet hole through the first connecting hole and the first connecting pipe, forming the first direction. the fluid circulation;

At the third station, the two ends of the first connecting pipe are respectively connected with the first connecting hole and the fluid inlet hole, and the two ends of the third connecting pipe are respectively connected with the second connecting hole and the fluid outlet hole. A connecting pipe flows into the second cavity in the hydraulic drive assembly from the first connecting hole, and the fluid in the first cavity of the hydraulic drive assembly flows out from the fluid outlet hole through the second connecting hole and the third connecting pipe, forming a second direction fluid circulation.

In an embodiment of the present invention, the fluid inlet hole and the fluid outlet hole are arranged oppositely, the first connection hole and the second connection hole are arranged oppositely, and the connecting line between the center of the fluid inlet hole and the center of the fluid outlet hole is opposite to the center of the first connection hole. It is perpendicular to the connecting line between the centers of the second connecting holes.

In an embodiment of the present invention, the conversion control and the conversion base are provided with a limiting portion for limiting the rotation angle of the conversion control, and the limiting portion includes three arc-shaped grooves provided on the conversion base and three and three grooves provided on the conversion control. Each of the arc-shaped grooves is matched with the convex portion, and the three arc-shaped grooves are respectively arranged corresponding to the fluid inlet hole, the first connection hole and the second connection hole.

In an embodiment of the present invention, the oil inlet assembly includes a driving motor, an oil tank and a connecting part, the oil tank and the connecting part are arranged on the reversing body, the eccentric shaft of the driving motor is connected with the connecting part, and the connecting part has a plurality of eccentric shafts along the eccentric axis. Piston assemblies arranged in the circumferential direction of the shaft, each piston assembly has a plurality of oil holes communicating with the fluid inlet hole and the oil tank.

In an embodiment of the present invention, each piston assembly includes a spring seat, a spring, a piston and an oil-activated switch. The spring is fixed to the spring seat. The piston is connected with the spring, and the piston is provided with a plurality of oil holes which communicate with the fluid inlet hole and the oil tank. The oil switch is sleeved on the spring and is located on the side of the piston close to the spring seat.

In an embodiment of the present invention, the reversing assembly includes a reversing body and a converting control. The reversing body has a fluid inlet pipe and a fluid outlet pipe. The conversion control is arranged in the reversing body along the axial direction perpendicular to the reversing body, and the conversion control has a plurality of through holes whose axes are parallel to the direction of the fluid inlet pipe. move.

The first oil pipe and the second oil pipe are respectively connected to the conversion control and the hydraulic drive assembly to form a fluid circulation;

When the conversion control is located at the first station, the conversion control blocks the first oil pipe and the second oil pipe, and the fluid circulates between the fluid inlet pipe and the fluid outlet pipe;

When the conversion control is located at the second station, the conversion control moves from the first station to the side of the reversing body, and the fluid flows from the fluid inlet pipe into the first oil pipe through the through hole on the conversion control, and then flows into the second oil pipe of the hydraulic drive assembly. In a cavity, the fluid in the second cavity of the hydraulic drive assembly flows from the second oil pipe and the through hole on the conversion control to the fluid outlet pipe, and the fluid forms a circulation in the first direction in the hydraulic drive assembly;

When the conversion control is located at the third station, the conversion control moves from the first station to the other side of the reversing body, and the fluid flows from the fluid inlet pipe into the second oil pipe through the through hole on the conversion control, and then flows into the hydraulic drive assembly. In the second cavity, the fluid in the first cavity of the hydraulic drive assembly flows from the first oil pipe and the through hole on the conversion control to the fluid outlet pipe, and the fluid forms a circulation in the second direction in the hydraulic drive assembly.

In an embodiment of the present invention, three through holes are provided at equal intervals on the conversion control, the fluid inlet pipe includes four inflow branch pipes with equal diameters, and the fluid outlet pipe includes three outflow branch pipes with the same diameter as the inflow branch pipe. The inflow branch pipe, the second inflow branch pipe and the first outflow branch pipe are arranged corresponding to the first through hole, and the diameter of the first through hole is larger than the diameter of one outflow branch pipe but smaller than or equal to the diameter of two outflow branch pipes;

The third inflow branch pipe and the second outflow branch pipe are arranged corresponding to the second through hole, and the diameter of the second through hole is larger than the diameter of one outflow branch pipe but smaller than or equal to the diameter of two outflow branch pipes;

The fourth inflow branch pipe is arranged corresponding to the third through hole, and the diameter of the third through hole is smaller than or equal to the diameter of one outflow branch pipe;

The first oil pipe includes a first oil circuit branch pipe and a second oil circuit branch pipe, the first oil circuit branch pipe and the second oil circuit branch pipe are arranged corresponding to the first through hole; the second oil pipe includes a third oil circuit branch pipe and a fourth oil circuit branch pipe , the third oil circuit branch pipe is correspondingly arranged with the second through hole, and the fourth oil circuit branch pipe is arranged correspondingly with the third through hole;

When the switching control is switched in the station, the distance that the switching control moves to one side or the other of the switching body is equal to the diameter of the inflow branch.

To sum up, the electric shear and expander provided by the present invention integrates the hydraulic drive assembly, the reversing assembly and the oil intake assembly, which not only greatly reduces the volume of the overall equipment, but also facilitates long-distance portability. Further, the direction of the oil circuit entering the hydraulic drive assembly is changed by adding a reversing assembly, so that the cylinder piston in the hydraulic drive assembly can realize automatic reciprocating motion, and automatic oil intake and return can be realized without manual operation. The working efficiency of the electric clipper is improved, so that it can complete the rescue and disaster relief work in the first time.

In order to make the above-mentioned and other objects, features and advantages of the present invention more obvious and easy to understand, the preferred embodiments are hereinafter described in detail together with the accompanying drawings.

Description of drawings

FIG. 1 is a schematic structural diagram of an electric shear and expander provided by the present invention.

FIG. 2 shows a schematic structural diagram of the reversing body in the reversing assembly in FIG. 1 .

FIG. 3 is a schematic structural diagram of the reversing body shown in FIG. 2 from another viewing angle.

FIG. 4 is a schematic structural diagram of the conversion control in FIG. 1 .

FIG. 5 is a schematic diagram showing the assembly of the conversion base and the conversion control when the reversing assembly is located at the first station.

FIG. 6 is a schematic diagram of the fluid flow when the reversing assembly is located at the first station.

FIG. 7 is a schematic diagram showing the assembly of the conversion base and the conversion control when the reversing assembly is located at the second station.

FIG. 8 is a schematic diagram of the fluid flow when the reversing assembly is located at the second station.

FIG. 9 is a schematic diagram showing the assembly of the conversion base and the conversion control when the reversing assembly is located at the third station.

FIG. 10 is a schematic diagram of the fluid flow when the reversing assembly is located at the third station.

Figure 11 is a schematic structural diagram of the piston assembly in the oil inlet assembly.

FIG. 12 is a schematic structural diagram of another embodiment of the present invention when the conversion control is located at the first station.

FIG. 13 is a schematic structural diagram of the conversion control shown in FIG. 12 when it is located at the second station.

FIG. 14 is a schematic structural diagram of the conversion control shown in FIG. 12 when it is located at the third station.

Detailed ways

As shown in FIG. 1 , the electric shearing and expanding device provided in this embodiment includes a shearing and expanding working head 1 , a hydraulic drive assembly 2 , a reversing assembly 3 and an oil inlet assembly 4 . The shearing and expanding working head 1 includes two intersecting and movably connected shearing and expanding pieces, each of which has a cutting edge 11 on the inner side and an expanding portion 12 on the outer side. The hydraulic drive assembly 2 is connected to the shearing and expanding working head 1, and drives the two shearing and expanding parts to open or close. The reversing assembly 3 is connected with the hydraulic drive assembly 2 to provide the hydraulic drive assembly 2 with two oil circuit circulations in opposite directions. The oil inlet assembly 4 is connected with the reversing assembly 3 .

The electric shear and expander provided by the present invention integrates shearing and expansion, specifically:

In the shearing state, the hydraulic drive assembly 2 drives the two shearing and expanding members to close, and the shearing edges 11 on the two shearing and expanding members cut the material. In this embodiment, the shearing edge 11 has a plurality of tooth gaps, and the width of the tooth gap gradually becomes thinner from the root to the end of the shearing edge. This arrangement enables the electric shears and expanders provided in this embodiment to cut materials of different diameters.

When used as an expander, the hydraulic drive assembly 2 drives the two shear-expanding pieces to expand to expand the inner diameter of the material. During the expansion process, the expansion part 12 on the outside of the shear-expanding element is in contact with the inner wall of the material, increasing the frictional force between the two to facilitate expansion. In this embodiment, each shearing and expanding member further has at least one traction hole for matching the traction chain during expansion. In this embodiment, each cutting and expanding member has a pulling hole. However, the present invention is not limited to this.

In this embodiment, the hydraulic drive assembly 2 includes an oil cylinder 21 , an oil cylinder piston 22 and a connecting rod. The oil cylinder 21 is connected with the reversing assembly 3 . The oil cylinder piston 22 is disposed in the oil cylinder 21 , and the oil pressure in the oil cylinder 21 pushes the oil cylinder piston 22 to move. One end of the connecting rod is connected with the cylinder piston 22 , and the other end is connected with the shearing and expanding working head 1 . In order to facilitate the replacement of different types of shearing and expanding working heads, in this embodiment, a connecting rod is provided to be detachably connected to the shearing and expanding working head 1 . However, the present invention is not limited to this.

In this embodiment, as shown in FIG. 2 to FIG. 4 , the reversing assembly 3 includes a reversing body 31 and a switching control 32 . The reversing body 31 includes a conversion base 311. The conversion base 311 has a fluid inlet hole 3111, a fluid outlet hole 3112, a first connection hole 3113 and a second connection hole 3114. The first connection hole 3113 and the second connection hole 3114 are connected to the oil cylinder 21. connected. The conversion control 32 is connected with the conversion base 311 , and the conversion control 32 has a first connection pipe 321 , a second connection pipe 322 and a third connection pipe 323 .

In order to facilitate replacement and maintenance, in this embodiment, a detachable connection between the reversing base 311 and the reversing body 31 is provided.

In this embodiment, the oil inlet assembly 4 includes a driving motor 41 , an oil tank 43 and a connecting portion 42 , and the oil tank 43 and the connecting portion 42 are arranged on the reversing body. The eccentric shaft of the driving motor 41 is connected with the connecting portion 42, and the connecting portion 42 has a plurality of piston assemblies arranged along the circumferential direction of the eccentric shaft, and each piston assembly has a plurality of oil holes communicating with the fluid inlet hole and the oil tank (due to the angle, not shown). In this embodiment, the number of the fuel tanks 43 is two. However, the present invention is not limited to this.

As shown in FIG. 11 , each piston assembly includes a spring seat 421 , a spring 422 , a piston 423 and an oil switch 424 . The spring 422 is fixed to the spring seat 421 . The piston 423 is connected with the spring 422, and the piston 423 has a plurality of oil holes communicating with the fluid inlet holes. The oil switch 424 is sleeved on the spring 422 and is located on the side of the piston 423 close to the spring seat 421 . The specific working principle is as follows: the eccentric shaft of the driving motor squeezes a plurality of piston assemblies arranged along its circumferential direction during the rotation process. The piston 423 in the piston assembly has a plurality of oil holes communicating with the fluid inlet holes, and the piston 423 is eccentric. The shaft, the oil switch 424 and the spring 422 reciprocate, and during the movement, the oil in the oil tank 43 is squeezed into the oil cylinder through the oil hole, the conversion control and the fluid inlet hole. The pressure in the cylinder increases and the cylinder piston moves. At the second station, the cylinder piston moves forward, and at the third station, the cylinder piston moves backward and returns to the initial position. The working principle of the commutation assembly 3 will be described in detail below with reference to FIGS. 5 to 10 :

5 and 6 respectively show the schematic diagram of the assembly of the conversion base and the conversion control and the schematic diagram of the flow direction of the fluid when the reversing assembly 3 provided in this embodiment is located at the first station. At the first station, both ends E and E1 of the second connecting pipe 322 are connected to the fluid inlet hole 3111 and the fluid outlet hole 3112, and the hydraulic oil passes through the second connecting pipe 322 between the fluid inlet hole 3111 and the fluid outlet hole 3112. During the cycle, the hydraulic oil does not enter the oil cylinder, and the oil cylinder piston 22 connected to the oil cylinder does not work.

Figures 7 and 8 respectively show the schematic diagram of the assembly of the conversion base and the conversion control and the schematic diagram of the flow direction of the fluid when the reversing assembly provided in this embodiment is located at the second station. At this time, as shown in FIG. 7 , the two ends D and D1 of the first connecting pipe 321 are respectively connected with the first connecting hole 3113 and the fluid outlet hole 3112 , and the two ends F1 and F of the third connecting pipe 323 are respectively connected with the second connecting hole 3113 and the fluid outlet hole 3112 . The connection hole 3114 is connected with the fluid inlet hole 3111, and the hydraulic oil flows into the first cavity 211 of the oil cylinder 21 from the second connection hole 3114 through the third connection pipe 323, and pushes the oil cylinder piston 22 to move forward, and the second cavity 212 The fluid flows out from the fluid outlet hole 3112 through the first connection hole 3113 and the first connection pipe 321 to form a fluid circulation in the first direction.

Figures 9 and 10 respectively show the schematic diagram of the assembly of the conversion base and the conversion control and the schematic diagram of the flow direction of the fluid when the reversing assembly provided in this embodiment is located at the third station. At this time, the two ends D1 and D of the first connecting pipe 321 are respectively connected with the first connecting hole 3113 and the fluid inlet hole 3111, and the two ends F and F1 of the third connecting pipe 323 are respectively connected with the second connecting hole 3114 and the fluid outlet hole 3111. The holes 3112 are connected, and the hydraulic oil flows into the second cavity 212 in the cylinder from the first connection hole 3113 through the first connecting pipe 321, and pushes the cylinder piston 22 back to the initial position, and the hydraulic oil in the first cavity 211 passes through the second cavity 212. The second connection hole 3114 and the third connection pipe 323 flow out from the fluid outlet hole 3112 to form a fluid circulation in the second direction. The alternate work of the second station and the third station enables the cylinder piston 22 to automatically reciprocate. Compared with the traditional hydraulic shears, the electric shears provided in this embodiment can automatically realize two opposite directions of oil flow. Road conversion, so there is no need for manual oil drainage, which greatly improves work efficiency.

In this embodiment, the fluid inlet hole 3111 and the fluid outlet hole 3112 are arranged oppositely, the first connection hole 3113 and the second connection hole 3114 are arranged oppositely, and the connecting line between the center of the fluid inlet hole 3111 and the center of the fluid outlet hole 3112 It is perpendicular to the line between the center of the first connection hole 3113 and the center of the second connection hole 3114, and the distances from the first connection hole 3113 to the fluid inlet hole 3111 and the fluid outlet hole 3112 are equal, and the second connection hole The distances from 3114 to the fluid inlet hole 3111 and the fluid outlet hole 3112 are equal. Correspondingly, as shown in FIG. 4 , the first connecting pipe 321 and the third connecting pipe 323 on the conversion control 32 have the same structure and are symmetrically arranged on both sides of the second connecting pipe 322 . This arrangement enables the switching between the second station and the third station to be realized when the conversion control 32 is rotated from the first station to the left and right sides. However, the present invention is not limited to this.

In this embodiment, the conversion control 32 and the conversion base 311 are rotatably connected. In order to realize the switching between different stations, preferably, the first connecting pipe 321, the second connecting pipe 322 and the third connecting pipe 323 are arranged in the form of a A circular arc is provided on the transition control 32 . This arrangement enables the user to use the first connecting pipe 321 , the second connecting pipe 322 and the third connecting pipe 323 as turning handles to realize the rotation of the conversion control 32 . However, the present invention is not limited to this.

In order to realize the accurate switching between the first station, the second station and the third station, in other present embodiments, the conversion control 32 and the conversion base 311 can be provided with a limiter that restricts the rotation angle of the conversion control, The limiting part includes three arc-shaped grooves arranged on the conversion base and a convex part matched with the three arc-shaped grooves arranged on the conversion control. A connection hole and a second connection hole are arranged correspondingly. However, the present invention is not limited to this. In other embodiments, three position marks can be set on the positions corresponding to the fluid inlet hole, the first connection hole and the second connection hole on the conversion base, and the corresponding conversion control is also provided with a rotation mark. When the corresponding position marks correspond, it indicates that the conversion control is rotated in place.

This embodiment presents a specific structure of the commutation assembly 3 . However, the present invention is not limited to this. In other embodiments, the reversing assembly 3 may include a reversing body 31' and a switching control 32'. The reversing body 31' has a fluid inlet pipe 311' and a fluid outlet pipe 312'. The conversion control 32' is arranged in the reversing body 31' along the axial direction perpendicular to the reversing body 31'. It is perpendicular to the axial movement of the reversing body 31'. The first oil pipe 33' and the second oil pipe 34' are respectively connected to the conversion control 32' and the hydraulic drive assembly 2 to form a fluid circulation.

Specifically, the conversion control 32' is provided with three through holes at equal intervals, the fluid inlet pipe 311' includes four inflow branch pipes with equal diameters, and the fluid outlet pipe 312' includes three outflow branch pipes with the same diameter as the inflow branch pipe, The first inflow branch pipe 3111 ′, the second inflow branch pipe 3112 ′ and the first outflow branch pipe 3121 ′ are arranged corresponding to the first through hole 321 ′, and the diameter of the first through hole 321 ′ is larger than that of one outflow branch pipe but smaller than or Equal to the diameter of the two outflow branches.

The third inflow branch pipe 3113' and the second outflow branch pipe 3122' are arranged corresponding to the second through hole 322', and the diameter of the second through hole 322' is larger than the diameter of one outflow branch pipe but less than or equal to the diameter of two outflow branch pipes. The fourth inflow branch pipe 3114' is disposed corresponding to the third through hole 323', and the diameter of the third through hole 323' is smaller than or equal to the diameter of one outflow branch pipe. In this embodiment, the diameters of the first through hole 321' and the second through hole 322' are equal to the diameter of two outflow branch pipes, and the third through hole 323' is equal to the diameter of one outflow branch pipe. However, the present invention is not limited to this.

The first oil pipe 33' includes a first oil circuit branch pipe 331' and a second oil circuit branch pipe 332', and the first oil circuit branch pipe 331' and the second oil circuit branch pipe 332' are arranged corresponding to the first through hole 321'; the second oil pipe 34' includes a third oil circuit branch pipe 341' and a fourth oil circuit branch pipe 342', the third oil circuit branch pipe 341' is arranged corresponding to the second through hole 322', and the fourth oil circuit branch pipe 342' and the third through hole 323' corresponding settings.

As shown in FIG. 12 , when the conversion control 32' is located at the first station, the conversion control 32' blocks the first oil pipe 33' and the second oil pipe 34', and the fluid flows between the fluid inlet pipe 311' and the fluid outlet pipe 312'. Cycle between, do not enter the oil cylinder on the right side of the picture, the oil cylinder does not work.

When the conversion control moves to the side where the reversing body 31' is located (in Figure 13, it moves to the top of the reversing body 31'), the conversion control 32' is located at the second station, and the moving distance is equal to the diameter of the inflow branch pipe. The direction of the oil circuit at this time is: the fluid flows from the fluid inlet pipe 321' into the first oil pipe 33' through the through hole on the conversion control 32', and then flows into the first cavity 211 of the oil cylinder 21 (the oil cylinder piston 22 moves the oil cylinder cavity The body is divided into a first cavity 211 and a second cavity 212), and the fluid in the second cavity 212 flows from the second oil pipe 34' and the through holes on the switching control 32' to the fluid outlet pipe 312'. details as follows:

The first inflow branch pipe 3111' and the second inflow branch pipe 3112' are opposite to the first through hole 321', the first oil circuit branch pipe 331' is opposite to the other end of the first through hole 321', the second outflow branch pipe 3122' and the third The oil branch pipes 341' are arranged on both sides of the second through hole 322'. This arrangement makes the fluid flow into the first through hole 321' through the first inflow branch pipe 3111' and the second inflow branch pipe 3112', and then flows into the first cavity 211 of the hydraulic cylinder through the first oil circuit branch pipe 331'; The fluid remaining in the second cavity 212 flows into the second through hole 322' through the third oil circuit branch pipe 341', and then flows out through the second outflow branch pipe 3122' to realize the circulation in the first direction in the hydraulic cylinder. the piston moves forward.

On the contrary, when the switching control 32' moves to the other side of the switching body 31' (moves downward in Fig. 14), the switching control 32' is located at the third station, and the moving distance is equal to the diameter of the inflow branch pipe. The direction of the oil path at this time is: the fluid flows from the fluid inlet pipe 311 ′ into the second oil pipe 34 ′ through the through hole on the conversion control 32 ′, and then flows into the second cavity 212 , and the fluid in the first cavity 211 flows from the first cavity 211 . An oil tube 33' and through holes in the switch control flow to the fluid outlet tube 312'. details as follows:

The fourth inflow branch pipe 3114' and the fourth oil circuit branch pipe 342' are respectively communicated with the third through hole 323'; the second oil circuit branch pipe 332' and the first outflow branch pipe 3121' are respectively communicated with the first through hole 321'. This arrangement makes the fluid flow into the third through hole 323' through the fourth inflow branch pipe 3114', and then flows into the second cavity 212 of the hydraulic cylinder through the fourth oil branch pipe 342', and the fluid in the first cavity 211 of the hydraulic cylinder passes through The second oil circuit branch pipe 332', the first through hole 321' and the first outflow branch pipe 3121' flow out. The second direction of circulation in the hydraulic cylinder is realized, the piston is pressed back to the initial position, and the piston is retracted. The reversing assembly shown in FIGS. 12 to 14 can also realize bidirectional oil circuit circulation.

In this embodiment, the electric clipper further includes a power supply battery 6 that is electrically connected to the oil inlet assembly 4 . In order to have better balance and facilitate the user's operation, preferably, the power supply battery 6 and the oil inlet assembly 4 are arranged on both sides of the shear expander housing.

In this embodiment, the electric clipper further includes a handle 5 disposed on the clipper housing to facilitate the user to carry it.

To sum up, the electric shear and expander provided by the present invention integrates the hydraulic drive assembly, the reversing assembly and the oil intake assembly, which not only greatly reduces the volume of the overall equipment, but also facilitates long-distance portability. Further, the direction of the oil circuit entering the hydraulic drive assembly is changed by adding a reversing assembly, so that the cylinder piston in the hydraulic drive assembly can realize automatic reciprocating motion, and automatic oil intake and return can be realized without manual operation. The working efficiency of the electric clipper is improved, so that it can complete the rescue and disaster relief work in the first time.

Although the present invention has been disclosed above by preferred embodiments, it is not intended to limit the present invention. Anyone who is familiar with the art can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection shall be subject to the scope of protection required by the claims.

Claims (9)

1. an electric clipper, is characterized in that, comprises: A shearing and expanding working head, comprising two intersecting and movably connected shearing and expanding pieces, each of which has a shearing edge on the inner side and an expanding portion on the outer side; The hydraulic drive assembly is connected to the shearing and expanding working head, and drives the two shearing and expanding parts to open or close; a reversing assembly, connected with the hydraulic drive assembly, to provide the hydraulic drive assembly with oil circuit circulation in two opposite directions; The reversing assembly includes: The reversing body includes a conversion base, the conversion base is provided with a fluid inlet hole, a fluid outlet hole, a first connection hole and a second connection hole, the fluid inlet hole is connected with the oil inlet component, and the first connection hole and the second connection hole is communicated with the hydraulic drive assembly; a conversion control, connected with the conversion base, the conversion control is provided with a first connection pipe, a second connection pipe and a third connection pipe; The conversion control and the conversion base are provided with a limit portion that limits the rotation angle of the conversion control, and the limit portion includes three arc-shaped grooves arranged on the conversion base and three arc-shaped grooves arranged on the conversion control. The three arc-shaped grooves are respectively arranged corresponding to the fluid inlet hole, the first connecting hole and the second connecting hole. 2 . The shear expander according to claim 1 , wherein the shearing edge has a plurality of tooth gaps, and the width of the tooth gaps gradually decreases from the root to the end of the shearing edge. 3 . 3 . The scissor and expander according to claim 1 , wherein each scissor and expander further has at least one traction hole for matching the traction chain during expansion. 4 . 4. The electric shear and expander according to claim 1, characterized in that, on the first station, both ends of the second connecting pipe are connected with the fluid inlet hole and the fluid outlet hole, and the fluid is The fluid is circulated between the fluid inlet hole and the fluid outlet hole, and the fluid does not enter the hydraulic drive assembly; In the second station, the two ends of the first connecting pipe are respectively connected with the first connecting hole and the fluid outlet hole, and the two ends of the third connecting pipe are respectively connected with the second connecting hole and the fluid inlet hole. The three connecting pipes flow into the first cavity in the hydraulic drive assembly from the second connecting hole, and the fluid in the second cavity of the hydraulic drive assembly flows out from the fluid outlet hole through the first connecting hole and the first connecting pipe, forming the first direction. the fluid circulation; At the third station, the two ends of the first connecting pipe are respectively connected with the first connecting hole and the fluid inlet hole, and the two ends of the third connecting pipe are respectively connected with the second connecting hole and the fluid outlet hole. A connecting pipe flows into the second cavity in the hydraulic drive assembly from the first connecting hole, and the fluid in the first cavity of the hydraulic drive assembly flows out from the fluid outlet hole through the second connecting hole and the third connecting pipe, forming a second direction fluid circulation. 5. The electric shear expander according to claim 4, wherein the fluid inlet hole and the fluid outlet hole are arranged oppositely, the first connection hole and the second connection hole are arranged oppositely, and the center of the fluid inlet hole and the center of the fluid outlet hole are arranged oppositely. The connecting line between them is perpendicular to the connecting line between the center of the first connection hole and the center of the second connection hole. 6 . The electric clipper according to claim 4 , wherein the oil inlet assembly comprises a driving motor, an oil tank and a connecting part, the oil tank and the connecting part are arranged on the reversing body, and the eccentric shaft of the driving motor It is connected with the connecting part, and the connecting part has a plurality of piston assemblies arranged along the circumferential direction of the eccentric shaft, and each piston assembly has a plurality of oil holes communicating with the fluid inlet hole and the oil tank. 7. The electric shear expander according to claim 6, wherein each piston assembly comprises: spring seat; a spring, fixed on the spring seat; The piston is connected with the spring, and the piston is provided with a plurality of oil holes communicating with the fluid inlet hole and the oil tank; the oil switch is sleeved on the spring and is located on the side of the piston close to the spring seat. 8. The electric clipper according to claim 1, wherein the reversing assembly comprises: a reversing body, which has a fluid inlet pipe and a fluid outlet pipe in the reversing body; The conversion control is arranged in the reversing body along the axial direction perpendicular to the reversing body, and the conversion control has a plurality of through holes whose axes are parallel to the direction of the fluid inlet pipe. move to the axial direction of the body; The first oil pipe and the second oil pipe are respectively connected to the conversion control and the hydraulic drive assembly to form a fluid circulation; when the conversion control is located at the first station, the conversion control blocks the first oil pipe and the second oil pipe, and the fluid flows between the fluid inlet pipe and the second oil pipe. The fluid circulates between the pipes; When the conversion control is located at the second station, the conversion control moves from the first station to the side of the reversing body, and the fluid flows from the fluid inlet pipe into the first oil pipe through the through hole on the conversion control, and then flows into the second oil pipe of the hydraulic drive assembly. In a cavity, the fluid in the second cavity of the hydraulic drive assembly flows from the second oil pipe and the through hole on the conversion control to the fluid outlet pipe, and the fluid forms a circulation in the first direction in the hydraulic drive assembly; When the conversion control is located at the third station, the conversion control moves from the first station to the other side of the reversing body, and the fluid flows from the fluid inlet pipe into the second oil pipe through the through hole on the conversion control, and then flows into the hydraulic drive assembly. In the second cavity, the fluid in the first cavity of the hydraulic drive assembly flows from the first oil pipe and the through hole on the conversion control to the fluid outlet pipe, and the fluid forms a circulation in the second direction in the hydraulic drive assembly. 9 . The electric shear and expander according to claim 8 , wherein three through holes are provided at equal intervals on the conversion control, the fluid inlet pipe comprises four inflow branch pipes of equal diameter, and the fluid outlet pipe comprises three diameters. 10 . The outflow branch pipe with the same diameter as the inflow branch pipe, the first inflow branch pipe, the second inflow branch pipe and the first outflow branch pipe are arranged corresponding to the first through hole, and the diameter of the first through hole is larger than the diameter of one outflow branch pipe but smaller than or is equal to the diameter of the two outflow branches; The third inflow branch pipe and the second outflow branch pipe are arranged corresponding to the second through hole, and the diameter of the second through hole is larger than the diameter of one outflow branch pipe but smaller than or equal to the diameter of two outflow branch pipes; The fourth inflow branch pipe is arranged corresponding to the third through hole, and the diameter of the third through hole is smaller than or equal to the diameter of one outflow branch pipe; The first oil pipe includes a first oil circuit branch pipe and a second oil circuit branch pipe, the first oil circuit branch pipe and the second oil circuit branch pipe are arranged corresponding to the first through hole; the second oil pipe includes a third oil circuit branch pipe and a fourth oil circuit branch pipe , the third oil circuit branch pipe is correspondingly arranged with the second through hole, and the fourth oil circuit branch pipe is arranged correspondingly with the third through hole; When the switching control is switched in the station, the distance that the switching control moves to one side or the other of the switching body is equal to the diameter of the inflow branch.