CN219366294U

CN219366294U - Electric hydraulic tool

Info

Publication number: CN219366294U
Application number: CN202320597017.4U
Authority: CN
Inventors: 谢昌中
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-03-17
Filing date: 2023-03-17
Publication date: 2023-07-18
Anticipated expiration: 2033-03-17

Abstract

The utility model provides an electric hydraulic tool, and belongs to the technical field of machinery. The hydraulic tool solves the problem that the service life of the existing hydraulic tool is difficult to guarantee. This electric hydraulic tool, including the pump body, the pump body is including all being columnar send the casting die and let out the casting die, send the casting die center to offer along the axial and send the oilhole, let out the casting die center to offer the oil outlet along the axial, the one end of pressure release piece has concave installation cavity, send casting die one end to stretch into in the installation cavity and make oil feed hole and oil outlet be linked together, the pressure release hole has still been offered along the axial in the pressure release piece, just the one end intercommunication of pressure release hole extremely the installation cavity, connecting hole one and connecting hole two have still been offered along radial in the casting die, all be provided with pressure release steel ball and spring and pressure release steel ball in connecting hole one and the connecting hole two and overcome the elasticity effect removal of spring and make under the oil pressure effect in the oil outlet be linked together with the pressure release hole. The electric hydraulic tool can avoid damage caused by overhigh oil pressure.

Description

Electric hydraulic tool

Technical Field

The utility model belongs to the technical field of machinery, and relates to an electric hydraulic tool.

Background

The electric hydraulic tool comprises an electric hydraulic wire pressing clamp, an electric hydraulic shearing and expanding clamp, an electric hydraulic crimping clamp and the like. The electric hydraulic tool generally comprises a motor, an oil storage cavity, a hydraulic pump, a hydraulic cylinder, a switch assembly, a control valve and the like, wherein a return spring and a piston rod are arranged in the hydraulic cylinder, and the outer end of the piston rod is fixedly connected with a working end. When the electric hydraulic tool works, the hydraulic pump is driven to rotate through the motor, so that the pressure oil in the oil storage cavity is pressed into the hydraulic cylinder and pushes the hydraulic working end to be in a working state. When the hydraulic working end is required to stop working, the switch assembly is closed, the motor stops working, the oil drain hole is opened, and at the moment, the pressure oil is returned to the oil storage cavity under the action of the return spring.

However, in the actual use process, for example, when the oil pressure at the hydraulic cylinder is continuously increased but the oil drain hole is not opened in time, the hydraulic cylinder and the working end are extremely easy to be damaged, and the service life of the hydraulic tool is influenced.

Disclosure of Invention

The utility model aims at solving the problems existing in the prior art, and provides an electric hydraulic tool which solves the problem that the service life of the existing hydraulic tool is difficult to guarantee.

The aim of the utility model can be achieved by the following technical scheme:

the utility model provides an electronic hydraulic tool, includes the pump body, its characterized in that, the pump body is including all being columnar send the casting die and let out the casting die, send the casting die center to have offered along the axial and send the oilhole, the oil outlet has been seted up along the axial to the casting die center, the one end of pressure release piece has concave installation cavity, send casting die one end to stretch into in the installation cavity and make oil feed hole and oil outlet be linked together, the pressure release hole has still been seted up along the axial in the casting die, just the one end of pressure release hole communicates to the installation cavity, connecting hole one and connecting hole two have still been seted up along radial in the casting die, all be provided with pressure release steel ball and spring and pressure release steel ball in connecting hole one and the connecting hole two and overcome the spring action of spring under the oil pressure effect in the oil outlet and make oil outlet and pressure release hole are linked together.

When the electric hydraulic tool works, oil is conveyed from the oil conveying hole of the oil conveying part to the oil outlet hole of the pressure relief part and conveyed into the hydraulic cylinder, so that oil pressure is provided for working of a working end. When the oil pressure in the oil outlet continuously rises and exceeds a safety value, the oil pressure is exerted on the two pressure relief steel balls through the first connecting hole and the connection Kong Erfen, so that the pressure relief steel balls can move backwards after overcoming the elastic action of the springs, the oil outlet can be communicated to the pressure relief holes through the first connecting hole and the second connecting hole, the oil is subjected to pressure relief to the direction of the installation cavity through the pressure relief holes, the oil pressure in the oil outlet is reduced, the effect of automatic pressure relief is achieved, the situation that the damage is caused to the hydraulic cylinder and the working end due to the fact that the oil pressure in the oil outlet is too high is avoided, and the service life of a hydraulic tool is guaranteed. Here, the spring force coefficient of the spring in the first connecting hole and the second connecting hole can be adjusted according to actual needs, so that the two pressure relief steel balls can be opened simultaneously or respectively according to different actual oil pressures, and different use requirements are met.

In the above-mentioned electro-hydraulic tool, the pressure release member has a circular shoulder one located at a side wall of the first connecting hole, and the pressure release steel ball in the first connecting hole abuts against the shoulder one under the action of the spring force of the spring and blocks between the pressure release hole and the oil outlet. Under the default state, the pressure relief steel ball is propped against the first shoulder, so that oil is not drained from the pressure relief hole, otherwise, the oil pressure in the oil outlet is increased, the pressure relief steel ball acts on the pressure relief steel ball and moves to a position away from the first shoulder against the elastic force of the spring, the pressure relief hole is communicated with the oil outlet, and pressure relief is started.

In the above-mentioned electro-hydraulic tool, the pressure release member has a second annular shoulder at the side wall of the second connecting hole, and the pressure release steel ball in the second connecting hole abuts against the second shoulder under the action of the spring force of the spring and blocks between the pressure release hole and the oil outlet. And the same structure is adopted to realize pressure relief.

In the above-mentioned electro-hydraulic tool, the first and second connecting holes are distributed along an axial direction of the pressure release member, and the first connecting hole is closer to the installation cavity than the second connecting hole, and a maximum aperture of the first connecting hole is larger than a maximum aperture of the second connecting hole.

In the above-mentioned electro-hydraulic tool, a through hole is formed in the pressure feed member and extends axially through the position corresponding to the pressure relief hole. The oil discharged from the pressure release hole is further discharged to the oil inlet direction through the through hole.

In the above-mentioned electric hydraulic tool, the oil feed hole is located and is close to pressure relief piece one end inboard, pressure feed piece other end center has seted up the plunger hole along the axial, radially run through in the pressure feed piece between plunger hole and the oil feed hole and have seted up the oil absorption hole, and the oil absorption hole is linked together with plunger hole and oil feed hole simultaneously, be provided with the oil absorption steel ball that enables oil absorption hole and plunger hole to be linked together or blocked in the oil absorption hole, be provided with the check steel ball that enables oil feed hole and oil absorption hole to be linked together or blocked in the one end that the oil feed hole is close to the oil absorption hole. And a plunger is penetrated in the plunger hole, when the plunger moves in a direction away from the pressure release part, the check steel ball seals the oil feeding hole, the oil suction steel ball is opened, oil is sucked into the oil suction hole and the plunger hole, then the plunger is close to the pressure release part, the oil suction steel ball is blocked, the check steel ball is opened, and the oil is pressed into the oil feeding hole to feed the oil.

In the above-mentioned electric hydraulic tool, the electric hydraulic tool further comprises a main body, the pump body is fixed on the main body, a slot is formed in the bottom of the main body, and a battery is inserted in the slot. The electric power can be provided for the use of the electric hydraulic tool through the plugging of the battery, and the limitation of the plug-in type tool to site factors such as a socket and the like is eliminated.

Compared with the prior art, the electric hydraulic tool can play a role in automatic pressure relief, so that the situation that the hydraulic cylinder and the working end are damaged due to too high oil pressure in the oil outlet is avoided, and the service life of the hydraulic tool is ensured.

Drawings

Fig. 1 is a schematic cross-sectional view of a pump body in the present electro-hydraulic tool.

In the figure, 1, a pressure feeding piece; 2. a pressure release member; 3. an oil feed hole; 4. an oil outlet hole; 5. a mounting cavity; 6. a pressure relief hole; 7. a first connecting hole; 8. a second connecting hole; 9. decompression steel balls; 10. a spring; 11. a first shoulder; 12. a second shoulder; 13. a through hole; 14. a plunger hole; 15. an oil suction hole; 16. oil absorption steel balls; 17. and (5) stopping the steel balls.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

The electric hydraulic tool comprises a main body and a pump body fixed on the main body, wherein the bottom of the main body is provided with a slot which is horizontally arranged, and a detachable battery is inserted in the slot.

As shown in fig. 1, the pump body comprises a pressure delivering part 1 and a pressure releasing part 2 which are all columnar, and the pressure delivering part 1 and the pressure releasing part 2 are coaxially arranged. One end of the pressure release piece 2 is provided with a concave installation cavity 5, and one end of the pressure delivery piece 1 extends into the installation cavity 5 and abuts against the pressure release piece 2.

Wherein, feed piece 1 center has offered oil feed hole 3 and plunger hole 14 along axial, and feed hole 3 is located feed piece 1 and is close to the inboard of pressure release piece 2 one end, and plunger hole 14 is located the inboard of the other end, has radially run through in feed piece 1 between plunger hole 14 and the oil feed hole 3 and has offered oil absorption hole 15, and oil absorption hole 15 is linked together with plunger hole 14 and feed hole 3 simultaneously. In this embodiment, the bottom port of the oil suction hole 15 is an oil inlet, the top port is a closed port, a plug is sealed in the closed port, an oil suction steel ball 16 is arranged in the oil inlet, the oil suction steel ball 16 can seal the oil inlet, and can move slightly towards the direction of the closed port and abut against the inner end of the plug, so that the oil inlet is communicated with the plug hole 14.

The check steel ball 17 is arranged in one end of the oil feed hole 3, which is close to the oil suction hole 15, a limiting hole is formed in the side wall of the oil feed hole 3 in a penetrating mode, the limiting hole is connected with a limiting piece in a threaded mode, the inner end of the limiting piece can extend into the oil feed hole 3 and limit the axial direction of the check steel ball 17, and the check steel ball 17 can move in the axial direction in a small range to open or close the oil feed hole 3. In this embodiment, the limiting member is a screw.

When the oil-sucking device is in actual use, a columnar plunger is inserted in the plunger hole 14 in a sealing way, when the plunger is driven by the driving piece to move in the direction away from the pressure release piece 2, negative pressure is generated at the oil suction hole 15, the check steel ball 17 moves towards the oil suction hole 15 and seals the oil feeding hole 3, the oil suction steel ball 16 moves upwards to abut against the inner end part of the plug, so that the oil inlet is opened, oil is sucked into the oil suction hole 15 and the plunger hole 14, then the plunger moves reversely and approaches the pressure release piece 2, the oil suction steel ball 16 moves downwards to seal the oil inlet under the action of oil pressure, the check steel ball 17 moves away from the oil suction hole 15 under the action of the oil pressure and abuts against one side of the inner end of the limiting piece, and opens the oil feeding hole 3, so that the oil is fed into the oil feeding hole 3.

The center of the pressure release part 2 is provided with an oil outlet 4 in a penetrating way along the axial direction, the oil outlet 4 is communicated with the oil feeding hole 3, the pressure release part 2 is internally provided with a pressure release hole 6 along the axial direction, the pressure release hole 6 is arranged in parallel with the oil outlet 4, one end of the pressure release hole 6 is communicated with the mounting cavity 5, and a through hole 13 is formed in the position of the pressure feed part 1 corresponding to the pressure release hole 6 in the penetrating way along the axial direction. The oil bag can be communicated with the oil bag through the pressure relief hole 6 and the through hole 13 to drain oil.

The pressure release part 2 is also internally provided with a first connecting hole 7 and a second connecting hole 8 along the radial direction, the first connecting hole 7 and the second connecting hole 8 are internally provided with a pressure release steel ball 9 and a spring 10, and the pressure release steel ball 9 can move against the elastic action of the spring 10 under the action of oil pressure in the oil outlet 4 and enable the oil outlet 4 to be communicated with the pressure release hole 6. Specifically, the side wall of the pressure release part 2, which is positioned at the side wall of the first connecting hole 7, is provided with a circular convex shoulder 11, the inside of the first connecting hole 7 is provided with a pressure release steel ball 9, a spring 10 and a plug in sequence from inside to outside, the plug plugs the outer end of the first connecting hole 7, two ends of the spring 10 respectively lean against the pressure release steel ball 9 and the inner end of the plug, and under the elastic force of the spring 10, the pressure release steel ball 9 can lean against the convex shoulder 11 and block between the pressure release hole 6 and the oil outlet 4; similarly, the side wall of the pressure release part 2, which is positioned at the second connecting hole 8, is provided with a second annular shoulder 12, the second connecting hole 8 is internally provided with a pressure release steel ball 9, a spring 10 and a plug in sequence from inside to outside, the plug plugs the outer end of the second connecting hole 8, two ends of the spring 10 respectively lean against the inner ends of the pressure release steel ball 9 and the plug, and the spring force of the spring 10 of the pressure release steel ball 9 can lean against the second shoulder 12 and block the pressure release hole 6 and the oil outlet 4. In this embodiment, the first connection hole 7 and the second connection hole 8 are distributed along the axial direction of the pressure release member 2, and the first connection hole 7 is closer to the mounting cavity 5 than the second connection hole 8, and the maximum aperture of the first connection hole 7 is larger than the maximum aperture of the second connection hole 8.

When the electric hydraulic tool works, oil is conveyed from the oil conveying hole 3 of the oil conveying part 1 to the oil outlet 4 of the pressure relief part 2 and conveyed into the hydraulic cylinder, so that oil pressure is provided for working of a working end. When the oil pressure in the oil outlet 4 continuously rises and exceeds a safety value, the oil pressure acts on the two pressure relief steel balls 9 through the first connecting hole 7 and the second connecting hole 8 respectively, so that the pressure relief steel balls 9 can move backwards after overcoming the elastic force of the spring 10, the oil outlet 4 can be communicated with the pressure relief hole 6 through the first connecting hole 7 and the second connecting hole 8, the oil is decompressed to the direction of the installation cavity 5 through the pressure relief hole 6, the oil pressure in the oil outlet 4 is reduced, the effect of automatic pressure relief is achieved, the situation that the hydraulic cylinder and the working end are damaged due to the fact that the oil pressure in the oil outlet 4 is too high is avoided, and the service life of a hydraulic tool is guaranteed.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. The utility model provides an electronic hydraulic tool, includes the pump body, its characterized in that, the pump body is including all being columnar send casting die (1) and pressure release spare (2), send casting die (1) center to offer oil feed hole (3) along the axial, oil outlet (4) have been offered along the axial in pressure release spare (2) center, the one end of pressure release spare (2) has concave installation cavity (5), send casting die (1) one end to stretch into in installation cavity (5) and make oil feed hole (3) and oil outlet (4) be linked together, pressure release hole (6) have still been offered along the axial in pressure release spare (2), just pressure release hole (6) one end intercommunication extremely installation cavity (5), connecting hole one (7) and connecting hole two (8) have still been offered along radial in pressure release spare (2), all be provided with pressure release steel ball (9) and spring (10) and pressure release steel ball (9) can be in oil outlet (4) under the effect spring (10) and make oil outlet (4) be linked together.

2. An electrohydraulic tool according to claim 1, characterized in that the pressure relief piece (2) has a ring-shaped shoulder (11) at the side wall of the connecting hole (7), and that the pressure relief ball (9) in the connecting hole (7) rests against the shoulder (11) under the spring force of the spring (10) and blocks the pressure relief hole (6) from the oil outlet (4).

3. An electro-hydraulic tool as claimed in claim 2, wherein the pressure release member (2) is provided with a second annular shoulder (12) at the side wall of the second connecting hole (8), and the pressure release steel ball (9) in the second connecting hole (8) is abutted against the second shoulder (12) under the action of the elastic force of the spring (10) and blocks the pressure release hole (6) from the oil outlet hole (4).

4. An electrohydraulic tool according to claim 1, 2 or 3, characterized in that the first and second connecting holes (7, 8) are distributed along the axial direction of the pressure relief member (2), and that the first connecting hole (7) is closer to the mounting cavity (5) than the second connecting hole (8), the maximum pore diameter of the first connecting hole (7) being larger than the maximum pore diameter of the second connecting hole (8).

5. An electrohydraulic tool according to claim 1, 2 or 3, characterized in that a through hole (13) is formed in the pressure feed member (1) in an axial direction at a position corresponding to the pressure release hole (6).

6. An electric hydraulic tool according to claim 1, 2 or 3, characterized in that the oil feeding hole (3) is located at the inner side of one end of the pressure feeding piece (1) close to the pressure release piece (2), a plunger hole (14) is formed in the center of the other end of the pressure feeding piece (1) along the axial direction, an oil suction hole (15) is formed in the pressure feeding piece (1) between the plunger hole (14) and the oil feeding hole (3) in a penetrating manner in the radial direction, the oil suction hole (15) is simultaneously communicated with the plunger hole (14) and the oil feeding hole (3), an oil suction steel ball (16) capable of enabling the oil suction hole (15) to be communicated with the plunger hole (14) or being blocked is arranged in the oil suction hole (15), and a check steel ball (17) capable of enabling the oil feeding hole (3) to be communicated with the oil suction hole (15) or being blocked is arranged in one end of the oil feeding hole (3) close to the oil suction hole (15).

7. An electro-hydraulic tool as claimed in claim 1, 2 or 3, further comprising a body, the pump body being secured to the body, the bottom of the body having a socket into which a battery is inserted.