CN217494155U

CN217494155U - Portable electric hydraulic tool

Info

Publication number: CN217494155U
Application number: CN202221211449.9U
Authority: CN
Inventors: 翁明有; 翁晟皓
Original assignee: Yongkang Wanyi Tools Co ltd
Current assignee: Yongkang Wanyi Tools Co ltd
Priority date: 2022-05-17
Filing date: 2022-05-17
Publication date: 2022-09-27
Anticipated expiration: 2032-05-17

Abstract

The utility model relates to a portable electronic hydraulic tool, including handheld portion, motor device, hydraulic pump device and chassis, handheld portion sets up the upper end at motor device, hydraulic pump device includes the pump cover and the pump body, the pump cover is fixed in motor device's lower extreme, the pump body is fixed in the lower extreme of pump cover, be formed with the pump oil pocket between the pump body and the pump cover, be provided with pump oil mechanism in the pump oil pocket, the chassis is fixed in the lower extreme of the pump body, be equipped with the piston chamber on the pump body, go out oil passage and oil return channel, one side is equipped with the cushion chamber with oil return channel intercommunication on the pump body, the cushion chamber is equipped with the elasticity oil pocket in, the cushion chamber is arranged for the axis in cavity cylindrical cavity structure and perpendicular to piston chamber, the elasticity oil pocket is the cavity cylinder form and puts along the axis direction level of cushion chamber. It has not only avoided the influence to chassis structural strength through setting up the cushion chamber in one side on the pump body, has shortened the distance that fluid returned to the pump oil pocket behind the realization buffering purpose in addition, is favorable to quick oil return.

Description

Portable electric hydraulic tool

Technical Field

The utility model relates to a hydraulic tool especially relates to a portable electronic hydraulic tool.

Background

At present, among the oil return structure of common portable electric hydraulic tool on the market, the cushion chamber that is used for with oil return passage intercommunication generally all vertically sets up on the lateral wall of chassis, and this just leads to: on one hand, the side wall of the bottom frame is of a hollow structure, so that the structural strength of the bottom frame is greatly influenced, and the bottom frame is easily damaged in the high-strength impact working process of a hydraulic tool; on the other hand, when the oil entering the buffer cavity needs to flow back to the pump oil cavity of the hydraulic pump after the buffer purpose is achieved, the oil return distance is long, and quick oil return is not facilitated.

SUMMERY OF THE UTILITY MODEL

One of the purposes of the utility model is to overcome the deficiencies of the prior art, and provide a cushion chamber structural design is reasonable, does not influence chassis structural strength, and can realize the portable electric hydraulic tool of quick oil return.

A second object of the present invention is to provide a portable electro-hydraulic tool with a reasonable structural design of an oil pumping mechanism and a plunger seat which is not easily damaged.

The purpose of the utility model is realized through the following technical scheme:

a portable electric hydraulic tool comprises a handheld part, a motor device, a hydraulic pump device and a bottom frame, wherein the handheld part is arranged at the upper end of the motor device, the hydraulic pump device comprises a pump cover and a pump body, the pump cover is fixed at the lower end of the motor device, the pump body is fixed at the lower end of the pump cover, a pump oil cavity is formed between the pump body and the pump cover, an oil pumping mechanism is arranged in the pump oil cavity, the bottom frame is fixed at the lower end of the pump body, a piston cavity is arranged on the pump body, a piston is slidably mounted in the piston cavity, the lower end of a piston rod of the piston extends out of the piston cavity and penetrates into the bottom frame, an oil outlet channel for communicating the pump oil cavity and the piston cavity and an oil return channel for communicating the piston cavity and the pump oil cavity are also arranged on the pump body, a buffer cavity communicated with the oil return channel is arranged on one side of the pump body, an elastic oil sac is arranged in the buffer cavity, the buffer cavity is of a hollow cylindrical cavity structure and is perpendicular to the axis of the piston cavity, the elastic oil sac is in a hollow cylindrical shape and is horizontally arranged along the axis direction of the buffer cavity.

Furthermore, one end of the buffer cavity is provided with an exhaust hole, the other end of the buffer cavity is provided with an oil bag mounting opening, the exhaust hole is connected with an exhaust screw, and the oil bag mounting opening is connected with a sealing screw.

Furthermore, the buffer cavity is arranged on one side of the left and right direction on the pump body and extends along the front and back direction of the pump body.

Furthermore, the vertical distance between the central axis of the buffer cavity and the central axis of the piston cavity is 68-76mm, and the vertical distance between the central axis of the buffer cavity and the plane where the oil outlet of the oil return channel is located is 17-23 mm.

Furthermore, the vertical distance from the central axis of the buffer cavity to the central axis of the piston cavity is 72mm, and the vertical distance from the central axis of the buffer cavity to the plane where the oil outlet of the oil return channel is located is 20 mm.

Further, the port of the oil return passage communicating with the cushion chamber is inclined toward the outer peripheral surface of the elastic oil bladder.

Furthermore, the chassis is substantially in a transverse U shape and comprises an upper wall fixedly connected with the lower end of the pump body, a lower wall arranged at an interval with the upper wall and a side wall connecting the upper wall and the lower wall, and the buffer cavity is arranged on the side, corresponding to the side wall of the chassis, of the pump body.

Furthermore, the lower end of a piston rod of the piston penetrates through the upper wall of the bottom frame and a punching movable die is arranged at the end part of the penetrating end, and a punching fixed die corresponding to the punching movable die is arranged on the inner side of the lower wall of the bottom frame.

Furthermore, an oil outlet of the oil outlet channel is opened at the bottom wall of the piston cavity, an oil inlet of the oil return channel is opened at the peripheral wall of the piston cavity, an oil outlet of the oil return channel is opened at the upper end surface of the pump body, and a port of the oil return channel communicated with the buffer cavity is opened at the peripheral wall of the buffer cavity.

Further, the oil pumping mechanism is including being the several plunger subassembly of annular interval setting in the oil pumping intracavity, and each plunger subassembly all includes plunger seat, moves plunger, quiet plunger and reset spring, the plunger seat sets up on the up end of the pump body and with pump body integrated into one piece, the fixed suit of quiet plunger is at the inner chamber of plunger seat, move the plunger sliding sleeve in quiet plunger, the one end and the reset spring of moving the plunger support, the other end and the motor device transmission of moving the plunger are connected, be equipped with the oilhole on the plunger seat, be equipped with on the quiet plunger with the oil absorption chamber that goes into the oilhole intercommunication, be equipped with on the inner chamber wall of plunger seat with inhale the oil outlet of oil chamber intercommunication, this oil outlet constitutes the oil inlet of oil outlet passageway.

Compared with the prior art, the utility model discloses following beneficial effect has:

first, the utility model discloses ingeniously with the cushion chamber setting one side on the pump body, not only avoided the influence to chassis structural strength, also shortened the distance of cushion chamber apart from the pump oil pocket moreover, also shortened the distance that buffer intracavity fluid returned to the pump oil pocket after realizing the buffering purpose, be favorable to quick oil return.

Secondly, the utility model discloses each plunger subassembly that constitutes pump oil mechanism is by the plunger seat, move the plunger, constitution such as quiet plunger, wherein, the plunger seat sets up on the up end of the pump body and with pump body integrated into one piece, the fixed inner chamber of adorning at the plunger seat of quiet plunger, move the plunger sliding sleeve in quiet plunger, in operation, move the plunger and accomplish pump oil work in the quiet plunger reciprocating motion, at this in-process, because move the plunger not with the contact of plunger seat, so can not wear and tear the plunger seat, and even if wear and tear appears in quiet plunger, also only need with quiet plunger dismantle change can, this hydraulic means's cost of maintenance has from this greatly reduced.

Drawings

Fig. 1 is a schematic front view of a portable electro-hydraulic tool of the present invention.

Fig. 2 is a schematic side-view perspective view of a portable electro-hydraulic tool of the present invention.

Fig. 3 is an exploded schematic view of the middle hydraulic pump device of the present invention.

Fig. 4 is a schematic cross-sectional view of the pump body of the present invention.

Fig. 5 is a bottom perspective view of the pump body of the present invention.

Fig. 6 is a schematic top-view perspective view of the pump body of the present invention in which the dynamic plunger, the static plunger, and the return spring are mounted on the plunger seat.

Fig. 7 is a schematic top perspective view of the pump body of the present invention in which the dynamic plunger, the static plunger, and the return spring are not mounted on the plunger seat.

Fig. 8 is an exploded view of the dynamic piston, static piston and return spring of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments shown in the drawings. Further, descriptions of "upper end", "lower end", "left-right direction", "front-back direction" appearing in this embodiment are defined based on the direction of the drawing of the drawings.

As shown in fig. 1 to 8, the portable electric hydraulic tool according to the present embodiment includes a handheld portion 1, a motor device 2, a hydraulic pump device 3, and a chassis 4, the handheld portion 1 is disposed at an upper end of the motor device 2, the hydraulic pump device 3 includes a pump cover 31 and a pump body 32, the pump cover 31 is fixed at a lower end of the motor device 2, the pump body 32 is fixed at a lower end of the pump cover 31, a pump oil chamber 33 is formed between the pump body 32 and the pump cover 31, an oil pumping mechanism 34 is disposed in the pump oil chamber 33, the chassis 4 is fixed at a lower end of the pump body 32, a piston cavity 321 is disposed on the pump body 32, a piston 322 is slidably disposed in the piston cavity 321, a lower end of a piston rod 3220 of the piston 322 extends out of the piston cavity 321 and penetrates into the chassis 4, and an oil outlet channel 323 communicating the pump oil chamber 33 with the piston cavity 321 and an oil return channel 324 communicating the piston cavity 321 with the pump oil chamber 33 are further disposed on the pump body 32. A buffer cavity 325 communicated with the oil return channel 324 is arranged on one side of the pump body 32, an elastic oil bag 326 is arranged in the buffer cavity 325, the buffer cavity 325 is of a hollow cylindrical cavity structure and is perpendicular to the axis of the piston cavity 321, the elastic oil bag 326 is in a hollow cylindrical shape and is horizontally arranged along the axis direction of the buffer cavity 325, and the elastic oil bag 326 is horizontally arranged along the axis direction of the buffer cavity 325, which can also be understood that the central axis of the elastic oil bag 326 is parallel to or coincident with the central axis of the buffer cavity 325.

When the oil pump works, under the driving action of the motor device 2, the oil pumping mechanism 34 presses oil in the oil pumping chamber 33 into the piston chamber 321 through the oil outlet passage 323 to push the piston 322 to move downwards, meanwhile, the oil pressed into the piston chamber 321 pushes the piston 322 to move downwards to a target position and returns oil into the oil pumping chamber 33 through the oil return passage 324, during oil return, when oil return pressure is too high, part of the oil enters the buffer chamber 325 to press the elastic oil bag 326, so that the elastic oil bag 326 contracts and deforms to play a role in oil return buffering, and when the oil return pressure tends to be normal, the elastic oil bag 326 resets to enable the oil in the buffer chamber 325 to return oil to the oil pumping chamber 33 through the oil return passage 324.

An exhaust hole 3251 is formed in one end of the buffer cavity 325, an oil bag mounting hole 3252 is formed in the other end of the buffer cavity, an exhaust screw 3253 is connected to the exhaust hole 3251, and a sealing screw 3254 is connected to the oil bag mounting hole 3252. The exhaust hole 3251 is used for exhausting gas generated when the elastic oil bag 326 is pressed in the buffer cavity 325, and the oil bag mounting hole 3252 is used for installing or removing and replacing the elastic oil bag 326 in the buffer cavity.

In order to more reasonably utilize the existing size of the pump body 32 and ensure that the buffer chamber 325 has a sufficient buffer space, the buffer chamber 325 is provided on one side of the pump body 32 in the left-right direction and extends in the front-rear direction of the pump body 32.

In order to improve the oil return efficiency, the vertical distance A between the central axis of the buffer cavity 325 and the central axis of the piston cavity 321 is 68-76mm, and the vertical distance B between the central axis of the buffer cavity 325 and the plane where the oil outlet 3242 of the oil return channel 324 is located is 17-23 mm.

Preferably, the vertical distance a from the central axis of the buffer chamber 325 to the central axis of the piston chamber 321 is 72mm, and the vertical distance B from the central axis of the buffer chamber 325 to the plane where the oil outlet port 3242 of the oil return passage 324 is located is 20 mm.

In order to better absorb the impact of the oil during the oil return by the elastic oil bag 326 and improve the oil return buffering effect, the port 3240 of the oil return passage 324 communicating with the buffer chamber 325 is inclined toward the outer peripheral surface of the elastic oil bag 326.

As described above, the chassis 4 has a substantially horizontal U-shape including the upper wall 41 fixedly connected to the lower end of the pump body 32, the lower wall 42 spaced from the upper wall 41, and the side wall 43 connecting the upper wall 41 and the lower wall 42, and the buffer chamber 325 is provided on the pump body 32 on the side corresponding to the side wall 43 of the chassis 4.

As described above, the lower end of the piston rod 3220 of the piston 322 passes through the upper wall 41 of the chassis 4 and the punching movable die 5 is provided at the end of the passing end, and the punching fixed die 6 corresponding to the punching movable die 5 is provided inside the lower wall 42 of the chassis 4. The portable electric hydraulic tool can be used as a punching machine through the punching movable die 5 and the punching fixed die 6. The punching movable die 5 and the punching fixed die 6 can be disassembled and replaced by movable dies and fixed dies with other functions according to the use requirements.

As described above, the oil outlet port 3231 of the oil outlet passage 323 is opened in the bottom wall of the piston cavity 321, the oil inlet port 3241 of the oil return passage 324 is opened in the peripheral wall of the piston cavity 321, the oil outlet port 3242 of the oil return passage 324 is opened in the upper end surface of the pump body 32, and the port 3240 of the oil return passage 324, which communicates with the buffer cavity 325, is opened in the peripheral wall of the buffer cavity 325.

As described above, the oil pumping mechanism 34 includes a plurality of plunger assemblies 341 annularly and intermittently disposed in the oil pumping chamber 33, each plunger assembly 341 includes a plunger holder 3411, a movable plunger 3412, a stationary plunger 3413 and a return spring 3414, the plunger holder 3411 is disposed on the upper end surface of the pump body 32 and is integrally formed with the pump body 32, the stationary plunger 3413 is fixedly sleeved in the inner cavity of the plunger holder 3411 in an interference fit manner, the movable plunger 3412 is slidably sleeved on the stationary plunger 3413, one end of the movable plunger 3412 abuts against the return spring 3414, the other end of the movable plunger 3412 is in transmission connection with the eccentric output shaft of the electric machine device 2 through a needle bearing, the plunger holder 3411 is provided with an oil inlet 3415, the stationary plunger 3413 is provided with an oil suction chamber 3416 communicating with the oil inlet 3415, the cavity wall of the inner cavity of the plunger holder 3411 is provided with an oil outlet 3417 communicating with the oil suction chamber 3416, and the oil outlet 3417 forms an oil inlet of the oil outlet channel 323.

When the oil pumping device works, the rotating motion of the motor device 2 drives the movable plungers 3412 in the plunger assemblies 341 to reciprocate in the stationary plungers 3413 through the eccentric output shaft and the needle roller bearings, so that the oil pumping work is realized. When the static plunger 3413 is worn due to the frequent movement of the movable plunger 3412, the static plunger 3413 can be removed from the plunger holder 3411 by means of an ejecting or knocking tool, and thus, the maintenance cost is greatly reduced compared to the case where the entire pump body needs to be replaced due to the wear of the plunger holder caused by the direct sliding contact between the movable plunger and the plunger holder in the prior art.

The above mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention can not be limited thereby, and all the simple equivalent changes and modifications made according to the claims and the description of the present invention are still included in the scope of the present invention.

Claims

1. The utility model provides a portable electronic hydraulic tool, includes handheld portion, motor device, hydraulic pump device and chassis, handheld portion sets up the upper end at motor device, hydraulic pump device includes pump cover and the pump body, the pump cover is fixed in motor device's lower extreme, the pump body is fixed in the lower extreme of pump cover, be formed with the pump oil pocket between the pump body and the pump cover, be provided with pump oil mechanism in the pump oil pocket, the chassis is fixed in the lower extreme of the pump body, be equipped with the piston chamber on the pump body, sliding mounting has the piston in the piston chamber, the piston rod lower extreme of piston stretches out the piston chamber and penetrates in the chassis, still be equipped with the oil outlet channel and the oil return channel of intercommunication piston chamber and pump oil pocket of intercommunication pump oil pocket and piston chamber on the pump body, its characterized in that: one side is equipped with the cushion chamber with the oil return passage intercommunication on the pump body, be equipped with the elasticity oil pocket in the cushion chamber, the cushion chamber is the axis arrangement in hollow cylinder cavity structure and perpendicular to piston chamber, the elasticity oil pocket is the hollow cylinder form and puts along the axis direction level of cushion chamber.

2. A hand-held electro-hydraulic tool as claimed in claim 1, wherein: the oil bag sealing device is characterized in that one end of the buffer cavity is provided with an exhaust hole, the other end of the buffer cavity is provided with an oil bag mounting opening, the exhaust hole is connected with an exhaust screw, and the oil bag mounting opening is connected with a sealing screw.

3. A hand-held electro-hydraulic tool as claimed in claim 1 or 2, wherein: the buffer cavity is arranged on one side of the left and right directions on the pump body and extends along the front and back directions of the pump body.

4. A hand-held electro-hydraulic tool as claimed in claim 1 or 2, wherein: the vertical distance between the central axis of the buffer cavity and the central axis of the piston cavity is 68-76mm, and the vertical distance between the central axis of the buffer cavity and the plane where the oil outlet of the oil return channel is located is 17-23 mm.

5. A hand-held electro-hydraulic tool as claimed in claim 1 or 2, wherein: the vertical distance between the central axis of the buffer cavity and the central axis of the piston cavity is 72mm, and the vertical distance between the central axis of the buffer cavity and the plane where the oil outlet of the oil return channel is located is 20 mm.

6. A hand-held electro-hydraulic tool as claimed in claim 1 or 2, wherein: the port of the oil return passage, which is communicated with the buffer cavity, is inclined towards the peripheral surface of the elastic oil bag.

7. A hand-held electro-hydraulic tool as claimed in claim 1 or 2, wherein: the chassis is generally in a transverse U shape and comprises an upper wall fixedly connected with the lower end of the pump body, a lower wall arranged at an interval with the upper wall and a side wall connecting the upper wall and the lower wall, and the buffer cavity is arranged on the pump body and corresponds to one side of the side wall of the chassis.

8. A hand-held electro-hydraulic tool as claimed in claim 7, wherein: the lower end of a piston rod of the piston penetrates through the upper wall of the bottom frame, a punching movable die is arranged at the end part of the penetrating end, and a punching fixed die corresponding to the punching movable die is arranged on the inner side of the lower wall of the bottom frame.

9. A hand-held electro-hydraulic tool as claimed in claim 1 or 2, wherein: an oil outlet of the oil outlet channel is opened at the bottom wall of the piston cavity, an oil inlet of the oil return channel is opened at the peripheral wall of the piston cavity, an oil outlet of the oil return channel is opened at the upper end surface of the pump body, and a port of the oil return channel, which is communicated with the buffer cavity, is opened at the peripheral wall of the buffer cavity.

10. A hand-held electro-hydraulic tool as claimed in claim 1 or 2, wherein: the oil pumping mechanism is including being the several plunger subassembly of annular interval setting in the oil pumping intracavity, and each plunger subassembly all includes the plunger seat, moves plunger, quiet plunger and reset spring, the plunger seat set up on the up end of the pump body and with pump body integrated into one piece, the fixed suit of quiet plunger is at the inner chamber of plunger seat, move the plunger sliding sleeve in quiet plunger, the one end and the reset spring that move the plunger support the top, the other end and the motor device transmission of moving the plunger are connected, be equipped with into the oilhole on the plunger seat, be equipped with on the quiet plunger and inhale the oil chamber with the income oilhole intercommunication, be equipped with on the inner chamber wall of plunger seat and inhale the oil outlet of oil chamber intercommunication, this oil outlet constitutes the oil inlet of oil outlet passageway.