CN211819825U

CN211819825U - Miniature electric hydraulic pump

Info

Publication number: CN211819825U
Application number: CN202020123574.9U
Authority: CN
Inventors: 李名铝; 王俊
Original assignee: European Shield Technology Co ltd
Current assignee: European Shield Technology Co ltd
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2020-10-30
Anticipated expiration: 2030-01-19

Abstract

The utility model provides a miniature electric hydraulic pump, this miniature electric hydraulic pump include casing, drive assembly, pump oil subassembly, oil pipe joint and oil circuit subassembly. The driving assembly is arranged in the shell. The oil pumping assembly is arranged in the shell and connected to the driving assembly, and the oil is pumped out under the action of the driving assembly. The oil pipe joint is arranged at the front end of the shell and is communicated with the oil pumping assembly, and the oil pipe joint is detachably connected to the external working head. The oil circuit assembly is arranged in the shell and is communicated with the oil pipe joint.

Description

Miniature electric hydraulic pump

Technical Field

The utility model relates to the technical field of hydraulic pressure, and in particular to miniature electric hydraulic pump.

Background

In various rescue fields, rescue teams and policemen can use special rescue tools to break and dismantle metal or nonmetal structures to rescue victims trapped in dangerous environments. Among these rescue tools, an electrically powered hydraulic pump that provides a power source is one of the essential important tools. Most rescue tools in the market are integrated at present, and each working head is correspondingly integrated with a hydraulic pump. The integrated structure makes the hydraulic pump have poor universality, so that the cost of the rescue tool is greatly increased, and the difficulty and the efficiency of maintenance and replacement are increased.

In addition, the electric hydraulic pump on the market is large in size and the whole electric hydraulic pump extends along the axial direction of the working head, so that the axial length of the whole rescue tool is very long, and the electric hydraulic pump is difficult to operate in some narrow places or even cannot operate.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome prior art's not enough, provide a miniature electric hydraulic pump who matches multiple working head.

In order to achieve the above object, the present invention provides a miniature electric hydraulic pump, which comprises a housing, a driving assembly, an oil pumping assembly, an oil pipe joint and an oil circuit assembly. The driving assembly is arranged in the shell. The oil pumping assembly is arranged in the shell and connected to the driving assembly, and the oil is pumped out under the action of the driving assembly. The oil pipe joint is arranged at the front end of the shell and is communicated with the oil pumping assembly, and the oil pipe joint is detachably connected to the external working head. The oil circuit assembly is arranged in the shell and is communicated with the oil pipe joint.

According to the utility model discloses an embodiment, the oil circuit subassembly includes switching-over valve, pump oil pipeline and joint line, and the switching-over valve radially sets up in one side of pump oil subassembly, pump oil pipe connection pump oil subassembly and switching-over valve, and joint line connects switching-over valve and oil pipe and connects.

According to the utility model discloses an embodiment, the pump oil pipeline includes the play oil pipe that is connected with the pump oil subassembly and returns the oil pipe, and the joint pipeline includes the first joint pipeline and the second joint pipeline that are connected with oil pipe joint, and the switching-over valve changes the oil circuit direction in the joint pipeline.

According to the utility model discloses an embodiment, oil pipe connects for the oil pipe joint of double-barrelled single joint.

According to the utility model discloses an embodiment, the protecgulum detachable of casing is connected in the body of casing, and oil pipe connects and sets up in the protecgulum, and the oil circuit subassembly wears to penetrate the protecgulum and connects in oil pipe joint.

According to the utility model discloses an embodiment, miniature electric hydraulic pump is still including setting up in the outside flexible anti-skidding piece of handheld portion and cladding in the casing periphery.

According to the utility model discloses an embodiment, pump oily subassembly includes the pump body, double-plunger and oil bag. The pump body is provided with a central hole, two radial plunger holes arranged at two sides of the central hole, two axial oil outlet holes respectively communicated with the two radial plunger holes and an oil inlet groove, and the driving assembly extends into the central hole. The double plungers are arranged in the radial plunger holes, and each plunger comprises a plunger sleeve and a plunger rod positioned in the plunger sleeve. The oil bag sets up in one side of the pump body and through the oil feed tank intercommunication pump body.

According to the utility model discloses an embodiment, drive assembly is including the brushless motor, reduction gear and the eccentric shaft that connect gradually, and the eccentric shaft stretches into the centre bore of the pump body and drives the double-plunger in proper order.

According to the utility model discloses an embodiment, miniature electric hydraulic pump still includes power supply module, and power supply module includes battery, circuit board assembly and at least one LED lamp, and battery half bayonet setting sets up in the rear portion of casing, and circuit board assembly sets up in the inboard of battery, and at least one LED lamp sets up in the front end of casing.

To sum up, the utility model provides a miniature electric hydraulic pump sets up a detachable oil pipe joint of connecting in outside working head through the front end at the casing, and oil pipe joint communicates the pump oil subassembly in the casing through the oil circuit subassembly. Under the action of the driving assembly, the oil pumping assembly pumps oil out and conveys the oil to the oil pipe joint through the oil way assembly, and the oil pipe joint outputs the oil to the oil cylinder of the external working head, so that a push rod in the oil cylinder is pushed to realize the working of the working head. The setting of oil pipe joint makes working head and miniature electronic hydraulic pump be split type structure, and this kind of split type connected mode makes very convenience of change between them to improve miniature electronic hydraulic pump's commonality greatly, only need carry one or two general miniature electronic hydraulic pump in the rescue in order to match a plurality of working heads can. Furthermore, the split structure also greatly reduces the cost of the rescue tool.

In addition, the oil circuit assembly comprises a reversing valve, an oil pumping pipeline and a joint pipeline, and the reversing valve is arranged on one side of the oil pumping assembly along the radial direction, so that the axial length of the miniature electric hydraulic pump is greatly reduced, and the miniature electric hydraulic pump is convenient to operate in narrow spaces.

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

Drawings

Fig. 1 is a schematic structural view of a micro electric hydraulic pump according to an embodiment of the present invention.

Fig. 2 is a schematic transverse cross-sectional view of fig. 1.

Fig. 3 is a schematic diagram illustrating oil passages of the micro electric hydraulic pump in fig. 1 in a first oil passage state.

FIG. 4 is a partial schematic view of the oil circuit assembly and oil pipe joint of FIG. 3.

Fig. 5 is a schematic diagram illustrating oil passages of the micro electric hydraulic pump of fig. 1 in a second oil passage state.

FIG. 6 is a partial schematic view of the oil circuit assembly and oil pipe joint of FIG. 5.

Fig. 7 is an enlarged schematic view of the oil pumping assembly.

Fig. 8 is a diagram illustrating an oil path state according to another embodiment of the present invention.

Detailed Description

As shown in fig. 1 to 2, the micro electric hydraulic pump provided in the present embodiment includes a housing 1, a driving assembly 2, an oil pumping assembly 3, an oil pipe joint 4, and an oil path assembly 5. The driving assembly 2 is disposed in the housing 1. The oil pumping assembly 3 is arranged in the shell 1 and connected to the driving assembly 2, and pumps oil out under the action of the driving assembly 2. The oil pipe joint 4 is arranged at the front end of the shell 1 and is communicated with the oil pumping assembly 3, and the oil pipe joint 4 is detachably connected to an external working head. The oil circuit assembly 5 is arranged in the shell 1 and is communicated with the oil pipe joint 4.

In traditional integral type hydraulic tool, the working head is in the same place with the hydraulic pump is integrated, and the fluid of hydraulic pump output is followed the bottom input of the overhead hydro-cylinder of working along the axial, and the oil outlet on the hydraulic pump will be assembled with the inlet port of hydro-cylinder bottom accuracy when the assembly, not only assembles the difficulty and is difficult for changing the maintenance after the assembly. According to the miniature electric hydraulic pump provided by the embodiment, the oil pipe joint 4 is arranged at the front end of the shell, and the miniature electric hydraulic pump is detachably connected with the external working head by the detachable connection mode of the oil pipe joint 4 and the external working head. The setting of oil pipe joint 4 makes the miniature electric hydraulic pump that this embodiment provided can be compatible a plurality of outside working heads, in the actual rescue, can only carry the work demand that one or two miniature electric hydraulic pumps can satisfy a plurality of working heads, has simplified rescue equipment greatly, has also greatly made things convenient for the maintenance of miniature electric hydraulic pump or working head to change simultaneously.

In the existing integrated hydraulic tool, a driving assembly, a hydraulic assembly, an oil cylinder assembly and a working head are sequentially arranged along the axial direction. The layout structure enables the existing integrated hydraulic tool to be very long in length, the service environment of the integrated hydraulic tool is greatly limited by the overlong axial length, and the hydraulic tool with the overlong axial length cannot operate in gaps with small widths. To solve this problem, in the present embodiment, the oil path assembly 5 includes a reversing valve 51, an oil pumping pipeline 52 and a joint pipeline 53, the reversing valve 51 is disposed at one side of the oil pumping assembly 3 along the radial direction, the oil pumping pipeline 52 connects the oil pumping assembly 3 and the reversing valve 51, and the joint pipeline 53 connects the reversing valve 51 and the oil pipe joint 4. The directional valve 51 disposed in the radial direction allows the oil path assembly 5 to be distributed in both the axial direction and the radial direction, and this arrangement greatly reduces the axial length of the micro electro-hydraulic pump, thereby achieving miniaturization of the micro electro-hydraulic pump.

In this embodiment, the oil pumping pipeline 52 includes an oil outlet pipe 521 and an oil return pipe 522 connected to the oil pumping assembly 3, the joint pipeline 53 includes a first joint pipeline 531 and a second joint pipeline 532 connected to the oil pipe joint 4, and the direction changing valve 51 changes the direction of the oil path in the joint pipeline 53 to achieve the reciprocating circulation of the oil path, thereby achieving the reciprocating movement of the working head. The working principle of the oil circuit will be described in detail below with reference to fig. 3 to 6.

The first joint line 531 connects to the rodless cavity oil hole on the outer working head, and the second joint line 532 connects to the rod cavity oil hole on the outer working head.

In fig. 3 and 4, the selector valve 51 communicates between the outlet pipe 521 and the first joint line 531, and the return pipe 522 communicates with the second joint line 532. Under the action of the driving assembly 2, the oil pumping assembly 3 pumps oil in an oil bag out and enters the oil outlet pipe 521, the oil enters a rodless cavity of the oil cylinder from an oil hole of the rodless cavity through the first joint pipeline 531, a push rod in the oil cylinder moves forward and continuously compresses a rod cavity, and the oil in the rod cavity flows back to the oil pumping assembly 3 through an oil hole of the rod cavity and the second joint pipeline 532.

In fig. 5 and 6, the selector valve 51 is switched to communicate the oil outlet pipe 521 with the second joint line 532, and the oil return pipe 522 with the first joint line 531. At this time, the oil output by the oil pumping assembly 3 enters the rod cavity through the second joint pipeline 532 and the rod cavity oil hole, the push rod in the oil cylinder retreats and continuously compresses the rodless cavity, the oil in the rodless cavity flows back to the oil pumping assembly 3 through the rodless cavity oil hole and the first joint pipeline 531, and the push rod retreats to the initial position. The oil circuit circulation of fig. 3 to 6 realizes one cycle reciprocation of the working head, and the oil circuit is very simple. However, the present invention does not limit the specific use state of the oil passage. In other embodiments, as shown in fig. 8, the oil outlet pipe 521 may be provided to communicate with only one of the joint pipes to form a unidirectional oil output.

In the present embodiment, the tubing joint 4 is a double-tubing single-joint tubing joint. However, the present invention is not limited to this, and in other embodiments, the present invention may also be a connection structure of a dual joint. Or the oil pipe joint can be arranged to be telescopic, and the telescopic structure realizes the independent construction of the working head at a longer distance.

In the present embodiment, as shown in fig. 7, the oil pumping assembly 3 includes a pump body 31, a double plunger 32 and an oil bag 33. The pump body 31 has a center hole 311, two radial plunger holes 312 disposed on both sides of the center hole 311, two axial oil outlet holes 313 respectively communicating with the two radial plunger holes 312, and an oil inlet groove 314. The dual plungers 32 are mounted within the radial plunger bores 312, and each plunger 32 includes a plunger sleeve 321 and a plunger rod 322 disposed within the plunger sleeve 321. The oil bag 33 is disposed on one side of the pump body 31 and communicates with the pump body 31 through the oil inlet groove 314. The driving assembly 2 comprises a brushless motor 21, a speed reducer 22 and an eccentric shaft 23 which are connected in sequence, wherein the eccentric shaft 23 extends into a central hole 311 of the pump body and drives the double plungers 32 in sequence. The reciprocating motion of the plunger rod 322 by the eccentric shaft 23 pumps the oil out of the axial oil outlet 313.

In this embodiment, the front cover 11 of the housing 1 is detachably connected to the body 12 of the housing, the oil pipe joint 4 is disposed on the front cover 11, and the oil circuit assembly 5 penetrates the front cover 11 and is connected to the oil pipe joint 4. As shown in fig. 3, the oil path assembly 5 is disposed in the front cavity of the pump body and distributed along the radial direction of the pump body, and the driving assembly 2 is disposed below the body 12 and extends along the axial direction of the pump body 12.

In this embodiment, the micro electric hydraulic pump further includes a hand-held portion 6 disposed at the periphery of the housing 1 and a flexible anti-slip member 7 covering the hand-held portion. As shown in fig. 1, the hand-held portion 6 is provided above the main body 12, and the selector valve 51 is provided at the tip of the hand-held portion 6.

In this embodiment, the micro electric hydraulic pump further comprises a power supply module 8, the power supply module 8 comprises a battery 81, a circuit board module 82 and at least one LED lamp 83, the battery 81 is disposed at the rear portion of the housing 1 in a half-inserting manner, the circuit board module 82 is disposed at the inner side of the battery 81, and the at least one LED lamp 83 is disposed at the front end of the housing 1. The battery 81 is a rechargeable battery that provides electrical power for operation of the micro electro-hydraulic pump, and the circuit board assembly 82 implements control of the micro electro-hydraulic pump. An LED lamp 83 at the front end of the housing 1 provides conditions for night work.

Although the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is capable of other modifications and variations without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A miniature electrically-powered hydraulic pump, comprising:

a housing;

a drive assembly disposed within the housing;

the oil pumping assembly is arranged in the shell, is connected to the driving assembly and pumps out oil under the action of the driving assembly;

the oil pipe joint is arranged at the front end of the shell and is communicated with the oil pumping assembly, and the oil pipe joint is detachably connected to the external working head;

and the oil circuit assembly is arranged in the shell and is communicated with the oil pipe joint.

2. The micro electro-hydraulic pump according to claim 1, wherein the oil path assembly includes a direction valve disposed at one side of the oil pumping assembly in a radial direction, an oil pumping line connecting the oil pumping assembly and the direction valve, and a joint line connecting the direction valve and the oil pipe joint.

3. The miniature electric hydraulic pump of claim 2, wherein the pump line comprises an outlet line and an return line connected to the pump assembly, the connector line comprises a first connector line and a second connector line connected to the oil line connector, and the direction changing valve changes the direction of the oil path in the connector line.

4. The miniature electric hydraulic pump of claim 3, wherein the tubing joints are double-tubing single-joint tubing joints.

5. The miniature electric hydraulic pump according to claim 1, wherein the front cover of the housing is detachably connected to the body of the housing, the oil pipe joint is disposed on the front cover, and the oil passage assembly penetrates through the front cover and is connected to the oil pipe joint.

6. The miniature electric hydraulic pump of claim 1, further comprising a handle disposed at an outer periphery of the housing and a flexible anti-slip member wrapped around an exterior of the handle.

7. The miniature electrically-powered hydraulic pump of claim 1, wherein the oil pumping assembly comprises:

the pump body is provided with a central hole, two radial plunger holes arranged at two sides of the central hole, two axial oil outlet holes respectively communicated with the two radial plunger holes and an oil inlet groove, and the driving assembly extends into the central hole;

the double plungers are arranged in the radial plunger holes, and each plunger comprises a plunger sleeve and a plunger rod positioned in the plunger sleeve;

the oil bag is arranged on one side of the pump body and communicated with the pump body through an oil inlet groove.

8. The miniature electric hydraulic pump of claim 7, wherein said driving assembly comprises a brushless motor, a reducer, and an eccentric shaft connected in series, said eccentric shaft extending into the central bore of the pump body and driving the double plungers in series.

9. The micro electro-hydraulic pump of claim 1, further comprising a power supply assembly including a battery, a circuit board assembly, and at least one LED light, the battery being half-inserted into a rear portion of the housing, the circuit board assembly being disposed inside the battery, the at least one LED light being disposed in a front end of the housing.