CN211867654U

CN211867654U - Portable hydraulic tool

Info

Publication number: CN211867654U
Application number: CN202020171551.5U
Authority: CN
Inventors: 杨鹏举
Original assignee: Suzhou Daojian Precision Technology Co ltd
Current assignee: Suzhou Daojian Precision Technology Co ltd
Priority date: 2020-02-15
Filing date: 2020-02-15
Publication date: 2020-11-06
Anticipated expiration: 2030-02-15

Abstract

The application provides a portable hydraulic tool, it has the casing, be equipped with the actuating mechanism who can dismantle connection work subassembly in the casing, this actuating mechanism contains the piston, it disposes in the cavity of workspace, hydraulic tool moves the work subassembly action that drives its connection in the cavity based on the piston during operation, first pressure release subassembly, it contains first needle, cup joint in the first spring of first needle, dispose the disk seat part in first needle one side, the disk seat part has the cavity intercommunication overflow hole of intercommunication workspace, the overflow hole that is used for blockking up or opening the disk seat part of first needle, second pressure release subassembly, it communicates the reposition of redundant personnel hole to the part through the second runner, dispose the switch that is used for driving hydraulic tool on the handle. Therefore, when the hydraulic tool is applied, the retraction time of the piston (actuating mechanism) can be shortened, and the piston can be stopped at a certain position in the stroke, so that the time for moving the piston during the next operation is saved, and the operation efficiency is improved.

Description

Portable hydraulic tool

Technical Field

The utility model relates to a hydraulic tool technical field specifically relates to a portable hydraulic tool.

Background

Hydraulic tools are widely used in production activities and are divided into the following according to their use: hydraulic hole-drawing device, hydraulic pressure crimping pincers, hydraulic pressure riveter, hydraulic pressure hickey etc. it has high-efficient, convenient advantage. The hydraulic tool is provided with a one-way valve, when the tool works, a medium stored in an oil storage cavity is pumped out and flows based on the driving of a driving motor, the one-way valve is opened after the medium (hydraulic oil) reaches a preset pressure, moves to a valve opening position and is kept at the valve opening position, and the medium flows into a cavity of a working area to push a piston to move for working. When the operations such as crimping or broaching are finished, the internal pressure of the system reaches the set pressure, the oil drainage hole of the pressure relief assembly is opened, and at the moment, the medium in the cavity of the working area is withdrawn into the oil storage cavity under the action of the spring. The work is thus performed reciprocally. The existing hydraulic tool has the defects that the structure that the medium in the cavity of the working area is returned to the oil storage cavity is complex, the oil return speed is slow, and the next operation is carried out by mostly adopting a mode of returning to the initial position, so that the running efficiency of the tool is not high.

Therefore, a new hydraulic tool is needed.

SUMMERY OF THE UTILITY MODEL

Based on the above problem, the utility model provides a hydraulic tool to solve the problem that the above-mentioned exists.

The (portable) hydraulic tool greatly shortens the time of piston (actuating mechanism) retraction during operation and can be stopped at a certain position, so that the time of piston movement during next operation is saved, and the operation (such as crimping) efficiency is improved.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a portable hydraulic tool, which is provided with a shell and is characterized in that an actuating mechanism is arranged in the shell and is detachably connected with a working component for operation, the actuating mechanism comprises a piston which is arranged in a cavity of a working area, when the hydraulic tool works, the piston moves in the cavity to drive the working component connected with the piston to act,

a first pressure relief assembly including a first valve needle, a first spring sleeved on the first valve needle, and a valve seat member disposed at one side end of the first valve needle, the valve seat member having an overflow hole communicated with the cavity of the working area, one side end of the first valve needle being used for blocking or opening the overflow hole of the valve seat member,

a second pressure relief assembly communicated to the flow dividing hole of the valve seat member through a second flow passage,

a handle is arranged at one side end of the shell, and one side end of the handle is detachably connected with the battery pack;

the handle is provided with a switch for driving the hydraulic tool.

Preferably, the handle is further provided with a lighting unit for auxiliary lighting.

Preferably, the flow dividing hole of the valve seat part is arranged at the same side as the overflow hole and communicated with a cavity in the valve seat part, and the cavity is used for being communicated with the cavity of the working area.

Preferably, the portable hydraulic tool further comprises a return conduit communicating with the cavity of the working area, the valve seat member being partially disposed within the return conduit.

Preferably, the second pressure relief assembly is disposed in the oil tank, and has a driving portion, an output end of the driving portion is connected to the second valve needle, and an end cap is disposed at one end of the second valve needle. The plug is conical.

Preferably, the stopper is integrally formed with the second valve needle.

Preferably, a second spring is sleeved on the second valve needle.

Preferably, the driving part comprises a solenoid valve, and the output end of the solenoid valve is connected with the second valve needle.

Preferably, the second flow path communicates with the first return flow path through the split hole.

For the scheme among the prior art, the utility model discloses an advantage:

by adopting the hydraulic tool of the embodiment of the application, the hydraulic tool can be returned to the initial position or a certain position in a stroke path when the operation is finished according to application occasions during application, so that the operation (such as crimping) efficiency can be improved, and meanwhile, the oil return assembly of the hydraulic tool is simple and has high reliability.

Drawings

The invention will be further described with reference to the following drawings and examples:

fig. 1 is a schematic perspective view of a hydraulic tool according to an embodiment of the present invention;

fig. 2, fig. 3 and fig. 4 are schematic structural diagrams of the driving assembly in fig. 1.

Detailed Description

The above-described scheme is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes and are not intended to limit the scope of the present invention. The conditions used in the examples may be further adjusted according to the conditions of the particular manufacturer, and the conditions not specified are generally the conditions in routine experiments.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

The embodiment of the application provides a (portable) hydraulic tool, which comprises a shell, an actuating mechanism arranged in the shell and detachably connected with a working assembly for operation, wherein the actuating mechanism comprises a piston arranged in a cavity of a working area, the hydraulic tool drives the working assembly connected with the hydraulic tool to act (perform operation) based on the movement of the piston in the cavity when working, a first pressure relief assembly and a second pressure relief assembly are used for restoring a moving part of the working assembly to an initial position or a middle position in a stroke, a handle is arranged at one side end of the shell, and one side end of the handle is detachably connected with a battery pack; the handle is provided with a switch for driving the hydraulic tool. When the hydraulic tool is applied, the piston (actuating mechanism) of the tool can be stopped at a certain position in a stroke when retracting by triggering the second pressure relief assembly, so that the time for moving the piston during next operation is saved, and the operation (such as crimping) efficiency is improved.

A hydraulic tool according to an embodiment of the present invention will be described with reference to fig. 1 to 4. The drawings include schematic drawings, and the scale and the aspect ratio of each component may be different from those of the actual components.

Fig. 1 is a perspective view of a hydraulic tool. The hydraulic tool 100 includes a housing 102 having one end connected to a working unit 101 via a driving unit 103, a handle 104 disposed at one end of the housing 102, and a battery pack 106 connected to an end of the handle 104; the handle 104 is provided with a switch 105 for driving the hydraulic tool. Preferably, the working assembly 101 is removably attached to the housing 102, which allows for the replacement of different types of working assemblies depending on the application in different locations so that the hydraulic tool can be used for crimping, broaching, etc. When the hydraulic pressure-operated hydraulic pressure-. In one embodiment, a lighting unit is further disposed on the handle 104 to assist in lighting. When the hydraulic tool works, the motor drives the plunger to move to pump a medium into the space from the oil tank, the one-way valve is opened when the pressure in the space rises to a certain value, so that the medium flows into the space through the one-way valve to further push the piston to advance, the other end (not shown) of the piston is connected to the working assembly, and the operation is carried out through the working assembly. And after the operation, the medium in the working area cavity flows back to the oil tank.

Referring now to fig. 2 to 4, the driving assembly 103 of the hydraulic tool will be described in detail, when in operation, the switch 105 (see fig. 1) is triggered, the motor in the housing 102 operates to drive the plunger to move to pump the medium from the oil tank 4 to the space 8, one side end of the space 8 is provided with the check valve 9, when the pressure in the space 8 rises to a certain value, the check valve 9 is opened, so that the medium in the space 8 flows into the working area cavity 5 through the check valve 9, the medium has a certain pressure to push the piston 3 to advance, and the other end (not shown) of the piston 3 is connected with the working assembly 101 to perform operation.

The working area cavity 5 is communicated with the medium return pipe 10, when the pressure in the working area cavity 5 reaches a set pressure, the first pressure relief assembly is triggered, namely, the medium in the medium return pipe 10 communicated with the working area cavity 5 pushes the first valve needle 15 (see fig. 3) away through the overflow hole 16a, flows back to the oil tank 4 from the return hole 12, pushes the piston 3 to move backwards under the action of the spring 14 until the pressure exerted on the first valve needle 15 by the pressure spring 11 is greater than the pushing force of the medium in the first return flow passage 17 on the first valve needle 15, the first valve needle 15 is closed (the end 15b of the first valve needle 15 blocks the overflow hole 16a of the base part 16), and the piston 3 stops retracting (namely, the piston retracts to a preset position).

In one embodiment (see fig. 4), when the pressure in the working area cavity 5 reaches the set pressure, the medium pushes the first valve needle 15 away through the overflow hole 16a and flows back into the oil tank 4 from the return hole 12, at which time the second valve needle 2 is triggered, part of the medium in the first return flow channel 17 flows into the second flow channel 13 through the branch hole 16b of the seat part 16 and quickly flows back into the oil tank 4 through the second flow channel 13, so that the thrust of the medium in the first return flow channel 17 on the first valve needle 15 drops sharply, and when the thrust of the medium on (the conical plug 15b of) the first valve needle 15 (the thrust caused by the hydraulic pressure of the medium) is lower than the pressure exerted on the first valve needle 15 by the pressure spring 11, the valve needle 11 closes quickly, and the piston 3 stops retracting. The piston is stopped at the middle position in the forming process, so that the time for moving (advancing) the piston in the next operation is shortened, and the operation efficiency is improved. Preferably, the inching switch 105 triggers the second valve needle 2 when the piston and its connected telescopic part are retracted.

In the above-described embodiments, the predetermined working pressure is referred to as the hydraulic pressure which is built up in the hydraulic medium by the drive of the motor during operation of the hydraulic tool, at which hydraulic pressure the one-way valve is open for medium flow. This hydraulic pressure is formed in a hydraulic chamber from the moving part up to the check valve closing face when the check valve is closed. By lifting the non-return valve from the valve seat by acting on said part of the piston surface, the hydraulic medium can flow out through the valve seat, for example into a hydraulic medium reservoir.

In the above embodiment, if the hydraulic tool is in the process of pressing or stamping, for some reason, such as an emergency, the movement of the moving part of the working assembly is stopped after the operating switch is released.

In the hydraulic tool of the embodiment, the actuating mechanism comprises the motor which drives the plunger to move to pump the medium into the space from the oil tank when working, and the one-way valve is opened when the pressure in the space rises to a certain value, so that the medium flows into the space through the one-way valve to further push the piston to advance, and the other end of the piston is connected to the movable mechanism in the working assembly to perform operation. After the operation is finished, the pressure is relieved through the pressure relief assemblies (the first pressure relief assembly or the first and the second pressure relief assemblies), and the medium in the space of the working area flows back to the oil tank.

In the design of the hydraulic tool, a control module is arranged in the handle or the shell, the control module is preferably electrically connected with the battery pack, the battery pack provides driving electric energy, and the control module is electrically connected with the switch, the motor and the second pressure relief assembly and controls the operation of the switch, the motor and the second pressure relief assembly based on instructions. The battery pack is mounted to the handle in a pluggable manner.

In the hydraulic tool according to the embodiment, in the design of the housing, the first pressure relief assembly 1 is provided, the first pressure relief assembly 1 is substantially cylindrical, the first valve needle 15 is provided therein, the spring 11 is fitted over the first valve needle 15, the first valve needle 15 moves in the pressure relief assembly 1 (as shown in the arrow direction in fig. 2), the tapered plug 15b is provided at an end portion of the first valve needle 15, the tapered plug 15b blocks the overflow hole 16a in a normal state, and if the pressure of the medium in the first return flow passage 17 is low, the tapered plug 15b is maintained to block the overflow hole 16a by the action of the spring 11 until the action force of the medium in the first return flow passage 17 on the tapered plug is larger than the action force of the spring 11 on the first valve needle 15, so that the first valve needle 15 moves upward until the action force of the spring 11 on the first valve needle 15 is larger than the action force of the medium in the first return flow passage 17 on the tapered plug (by selecting the elastic modulus of the spring 11, when the acting force of the spring 11 on the first valve needle 15 is larger than the acting force of the medium in the first return flow channel 17 on the conical plug, the piston 3 is restored to the initial position under the action of the spring 14). The first valve needle 15 is provided at one end with a shoulder 15a and a conical plug 15 b. The tapered plug 15b is tapered. The tapered plug 15b, the shoulder 15a and the first needle 15 are integrally formed. The first valve needle 15 is cylindrical and the shoulder 15a is cylindrical, the diameter of the shoulder 15a being larger than the diameter of the first valve needle 15.

In the design of the hydraulic tool of the above embodiment, the second relief assembly is provided with the second valve needle 2, the spring 18 is sleeved on the second relief assembly, the conical plug 2a is arranged at one end of the second relief assembly, the conical plug blocks the inlet and outlet hole of the second flow passage 13 in the normal state, the second valve needle 2 is opened in the process of retracting the piston 3, the medium rapidly returns to the oil tank 4 from the inlet and outlet hole of the second flow passage 13, the pushing force of the medium on the first valve needle 15 in the first return flow passage 17 is rapidly reduced and is lower than the pressure applied to the first valve needle 15 by the pressure spring 11, the first valve needle 15 is rapidly closed, and the piston 3 stops retracting. Therefore, the piston stops at a certain position in the middle, so that the time for moving the piston in the next press-connection operation is shortened, and the operation efficiency is improved. Preferably, the second valve needle 2 is driven by a solenoid valve, the second valve needle 2 is normally closed (to block the hole of the second flow channel 13 and further block the second flow channel 13. the angle θ of the taper (horn profile) of the taper plug 2a is 20 ° to 70 °. the second pressure relief assembly is configured with a driving part 6 which is fixed to the side wall of the oil tank 4 through a fixing part 19, and has an output end connected to the second valve needle 2, the second valve needle 2 is sleeved with a second spring 18, and one end of which is configured with a taper plug 2a (the cross section of which is tapered), the second valve needle 2 moves based on the driving movement (extending/retracting) of the driving part 6 and moves back (retracting) based on the elastic force of the second spring 18. preferably, the driving part 6 is a solenoid valve which is configured in the oil tank 4, and has an output end connected to the second valve needle 2. the housing of the solenoid valve of the driving part 6 is connected to the pump body of steel material as one pole, the other pole is mounted on a metal rod with an insulating, sealing layer by a wire, thus transmitting the control signal of the battery valve. In one embodiment, the first valve needle is substantially perpendicular to the second valve needle.

When the driving assembly of the hydraulic tool works, the motor drives the plunger to move to pump a medium into the space from the oil tank, and when the pressure in the space rises to a certain value, the one-way valve is opened, so that the medium flows into the cavity of the working area through the one-way valve to further push the piston to advance, and the other end (not shown) of the piston is connected with the working assembly to work. The operation is accomplished and is passed through pressure relief valve subassembly pressure release when the pressure in the space reaches a definite value, with the medium backward flow in the space to the oil tank, the piston resumes to initial position or a certain position through the spring like this.

When the hydraulic tool works, after the medium pressure in the cavity of the working area reaches a set value, the first pressure relief valve is opened, the piston 3 returns, in the returning process, the tool switch is only required to be opened again, the second pressure relief assembly is triggered, and the piston stops returning so as to continue to work next time.

The portable hydraulic tool is provided with a shell and an executing mechanism positioned in the shell, the executing mechanism is detachably connected with a working assembly, a piston is arranged in a cavity of a working area, the piston moves in the cavity to drive the working assembly connected with the piston to move to act based on (a motor drives a plunger to move to pump a medium from an oil tank to the cavity of the working area) when the hydraulic tool works, and the retraction position of the piston is controlled by the combination of the first pressure relief assembly or the first pressure relief assembly and the second pressure relief assembly after the operation is finished, so that the operation efficiency of the working tool is improved.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A portable hydraulic tool, which is provided with a shell and is characterized in that an actuating mechanism is arranged in the shell and is detachably connected with a working component for operation, the actuating mechanism comprises a piston which is arranged in a cavity of a working area, when the hydraulic tool works, the piston moves in the cavity to drive the working component connected with the piston to act,

the handle is provided with a switch for driving the hydraulic tool.

2. The portable hydraulic tool of claim 1,

and the handle is also provided with a lighting unit for auxiliary lighting.

3. A portable hydraulic tool as in claim 1 wherein the bleed orifice of the valve seat member is disposed on the same side as the spill orifice and communicates with a cavity in the valve seat member, the cavity being adapted to communicate with the cavity of the working area.

4. A portable hydraulic tool as in claim 3 further comprising a return conduit in communication with the working area chamber, the valve seat member being partially disposed in the return conduit.

5. The portable hydraulic tool of claim 1, wherein the second pressure relief assembly is disposed in the oil tank and has a driving portion, an output end of the driving portion is connected to the second valve needle, and an end of the second valve needle is disposed with a plug, and the second valve needle is normally closed in a normal state, so that the plug of the second valve needle blocks the inlet/outlet hole of the second flow passage.

6. The portable hydraulic tool of claim 5, wherein the plug is integrally formed with the second valve needle.

7. The portable hydraulic tool of claim 5, wherein a second spring is sleeved on the second valve needle.

8. The portable hydraulic tool of claim 5, wherein the drive portion comprises a solenoid valve having an output connected to the second valve needle.

9. The portable hydraulic tool of claim 5, wherein the second flow passage communicates with the first return flow passage through a bleed hole.