CN211875643U

CN211875643U - Electric tool

Info

Publication number: CN211875643U
Application number: CN201922476230.6U
Authority: CN
Inventors: 庄佳元; 张耀蔚
Original assignee: Jiangsu Hyson Electronic Technology Co ltd
Current assignee: Jiangsu Hyson Electronic Technology Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-11-06
Anticipated expiration: 2029-12-31

Abstract

The utility model provides an electric tool, which comprises a shell and an actuator, wherein the shell is provided with at least one oil inlet and at least one oil return port, the actuator is arranged in the shell, an oil cavity is formed between the actuator and the shell, the actuator is provided with a hole communicated with the oil cavity, the electric tool also comprises a hydraulic unit, the hydraulic unit provides lubricating oil for the actuator through the oil inlet and the hole, the oil cavity collects oil and returns oil through the oil return port, in actual use, the oil can not directly enter the actuator through the hole after entering the oil cavity through the oil inlet, the oil can firstly enter the oil cavity, then part of the oil is atomized by shock oil in the working process of the electric hammer, in addition, the heat generated by the work of the electric hammer can also evaporate part of the oil, thus, the gas in the oil cavity can be doped with atomized or evaporated oil and enters the inside of a cylinder to lubricate a, this lubrication will be more uniform and complete.

Description

Electric tool

Technical Field

The utility model relates to an electric tool makes technical field, especially relates to a lubricating oil circulation system of electric hammer.

Background

The electric hammer is a common electric tool which can rotate horizontally and impact, can perform vibration operation on concrete, brick walls and stone, and can also perform simple chiseling. The electric hammer transmission mechanism drives the drill bit to do rotary motion, meanwhile, the reciprocating hammering motion with the direction perpendicular to the rotary head is also carried out, the motor drives the gear or the chain, the gear or the chain drives the eccentric shaft to move, and the eccentric shaft drives the piston in the cylinder to reciprocate through the connecting rod, so that the front air hammer continuously impacts. The transmission mechanism drives the piston to compress air in the cylinder in a reciprocating manner, the air pressure in the cylinder changes periodically, and the air hammer in the cylinder is driven to strike the top of the impact rod in a reciprocating manner, so that a high-frequency impact effect is formed.

Traditional electric hammer generally adopts the grease lubrication, and the part in the electric hammer is at the in-process of motion, and the very easy is shoved solid-state grease away, causes the few oil of electric hammer inner wall and motion part, and the motion part that has lacked lubricating oil can cause irreversible wearing and tearing at relative motion's in-process, appears wearing and tearing between the motion part and will cause the inside gas tightness variation of electric hammer for the impact of electric hammer is powerless, influences the life of electric hammer.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pair of lubricating oil circulation system and electric hammer, the grease when having solved the electric hammer and adopting traditional grease lubrication is easily by the displacement away and is caused the problem that moving part caused irreversible wear easily in the relative motion process, lubricating oil circulation system can make liquid lubricating oil along with high-speed rotary part circulating lubrication, guarantees that inside each part of electric hammer all has lubricating oil, reduces the wearing and tearing of the inside part of electric hammer, extension electric hammer life.

In order to achieve the above object, the technical solution of the present invention is specifically realized as follows:

an aspect of the utility model discloses an electric tool, include:

the oil pump comprises a shell, wherein at least one oil inlet and at least one oil return port are formed in the shell;

an actuator built into the housing, an oil chamber formed between the actuator and the housing, the actuator having a bore in communication with the oil chamber;

and the hydraulic unit provides lubricating oil for the actuator through the oil inlet and the hole, and the oil cavity collects oil and returns the oil through the oil return opening.

According to the utility model discloses an embodiment, hydraulic unit includes:

the first oil port of the oil pump is respectively connected with the oil inlet and the oil return port through a valve bank;

the second oil port of the oil pump is communicated with the oil box;

and the valve group comprises a three-position three-way electromagnetic valve, a port P of the three-position three-way electromagnetic valve is communicated with a first oil port of the oil pump, a port A of the three-position three-way electromagnetic valve is communicated with the oil inlet, and a port T of the three-position three-way electromagnetic valve is communicated with the oil return port.

According to the utility model discloses an embodiment, when tribit three-way solenoid valve is located initial position, P mouth, A mouth and T mouth all seal, when tribit three-way solenoid valve is located first work position, P mouth with the A mouth switches on, the T mouth seals, the oil pump fuel feeding, when tribit three-way solenoid valve is located second work position, P mouth and T mouth switch on, the A mouth seals, the oil pump is followed the oil pocket inhales.

According to the utility model discloses an embodiment, the valves still includes flow control valve and overflow valve, flow control valve is located on the oil circuit between first hydraulic fluid port and the P mouth, the overflow valve is located on the oil circuit between first hydraulic fluid port and the oil box oil return opening.

According to an embodiment of the present invention, the oil pump and the oil box are provided at a handle position of the electric tool and fixed on an inner wall of the housing.

According to an embodiment of the invention, the actuator is a cylinder, the bore being provided on a cylinder barrel of the cylinder, the bore further being configured as an air vent.

According to the utility model discloses an embodiment, the jump bit is installed in the cylinder of cylinder with the help of the cover body, the piston of cylinder passes through air hammer drive jump bit, the cover body, air hammer, piston adopt Y type sealing washer sealed with the cylinder respectively, simultaneously hydraulic unit does the cover body, air hammer and piston provide the lubricating oil of operation.

The beneficial technical effects are as follows: the utility model discloses an electric tool, which comprises a shell and an actuator, wherein the shell is provided with at least one oil inlet and at least one oil return port, the actuator is arranged in the shell, an oil cavity is formed between the actuator and the shell, the actuator is provided with a hole communicated with the oil cavity, the electric tool also comprises a hydraulic unit, the hydraulic unit provides lubricating oil for the actuator through the oil inlet and the hole, the oil cavity collects oil and returns oil through the oil return port, in actual use, the oil can not directly enter the actuator through the hole after entering the oil cavity through the oil inlet, the oil can firstly enter the oil cavity, then part of the oil is atomized by shock oil in the working process of an electric hammer, in addition, the heat generated by the work of the electric hammer can also evaporate part of the oil, thus, the gas in the oil cavity can be mixed with atomized or evaporated oil and enters the inside of a cylinder to lubricate, this lubrication will be more uniform and complete.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiments will be briefly described below.

FIG. 1 is a schematic view of a lubricating oil circulation system according to an embodiment of the present invention;

fig. 2 is a schematic structural view of an electric hammer according to an embodiment of the present invention;

fig. 3 is a valve block diagram of the hydraulic unit of the present embodiment;

fig. 4 is a schematic block diagram of the hydraulic unit of the present embodiment.

The oil pump comprises an oil pump 1, an oil box 2, an oil inlet 3, an oil collecting port 4, an air cylinder 5, an impact rod 6, a rotating sleeve 7, an air hammer 8 and a piston 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1-2, the electric power tool of the present embodiment includes a housing and an actuator, wherein the housing is provided with at least one oil inlet and at least one oil return port, the actuator is disposed in the housing, an oil chamber is formed between the actuator and the housing, and the actuator has a hole communicating with the oil chamber. Further, the electric power tool of the present embodiment further includes a hydraulic unit that supplies the actuator with lubricating oil via the oil inlet and the hole, and the oil chamber collects oil and returns the oil through the oil return port.

It will be appreciated by those skilled in the art that the power tool is generally inclined when in use, and therefore the oil inlet is preferably disposed at the upper top of the housing to facilitate the entry of the lubricating oil into the bore, and the oil return port is preferably disposed at the lower bottom of the housing to facilitate the outflow and collection of the lubricating oil from the bore to the oil chamber.

In addition, the quantity and the position of the oil inlet and the oil return port can be selected according to actual needs, and the oil inlet and the oil return port are not limited.

In the in-service use, fluid can not directly get into inside the actuator by the hole after getting into the oil intracavity through the oil inlet, for example in this embodiment, electric tool is the electric hammer, the electric hammer adopts the cylinder as the actuator, and the cylinder itself possesses the air vent, consequently, can directly utilize the air vent conduction lubricating oil of cylinder, inhale the blowout with the lubricating oil in the oil intracavity when the air vent is given vent to anger promptly, in fact, fluid can get into in the oil chamber earlier, then shock fluid makes partial fluid atomizing in the electric hammer working process, the heat that the electric hammer work produced also can make partial fluid evaporation in addition, gas in the oil chamber can mix atomizing or the fluid of evaporation like this, and get into the cylinder inside for the working element lubrication under the suction of air vent, this kind of lubricating mode can be more even abundant. Of course, part of the oil may flow to the vent hole and be directly sucked by the vent hole during operation, but the lubricating effect is not affected in the condition.

In this embodiment, the impact rod 6 is installed in the cylinder of the cylinder by means of the sleeve body 7, the piston of the cylinder drives the impact rod through the air hammer, the sleeve body 7, the air hammer 8 and the piston 9 are respectively sealed with the cylinder by adopting a Y-shaped sealing ring, and the hydraulic unit provides lubricating oil for the sleeve body 7, the air hammer 8 and the piston 9.

It should be noted that, in the present embodiment, the amount and the frequency of the injected oil may be implemented by a valve group of the hydraulic unit, as shown in fig. 3 and 4, the valve group may be controlled by a controller, that is, the controller writes a control program, and controls the valve group to operate according to a corresponding control strategy. The controller can be a controller of the electric tool, and only the control program of the hydraulic unit needs to be written.

According to the utility model discloses an embodiment, as shown in fig. 3, the hydraulic unit includes oil pump 1, oil box 2 and valves, oil pump 1 is the bidirectional gear pump, oil pump 1 can supply oil to the actuator, also can retrieve the lubricated oil of actuator, specifically, oil pump 1's first hydraulic fluid port links to each other with oil inlet and oil return opening respectively through the valves, oil pump 1's second hydraulic fluid port communicates in oil box 2, wherein, the valves includes three-position three-way solenoid valve, three-position three-way solenoid valve's P mouth and oil pump 1's first hydraulic fluid port intercommunication, three-position three-way solenoid valve's A mouth and oil inlet intercommunication, three-position three-way solenoid valve's T mouth and oil return opening intercommunication.

When the three-position three-way electromagnetic valve is positioned at the initial position, the port P, the port A and the port T are all closed, and the hydraulic unit does not work at the moment.

When the three-position three-way electromagnetic valve is located at a first working position, the port P and the port A are communicated, the port T is closed, the oil pump 1 supplies oil, pressure oil sequentially enters the oil cavity through the first oil port, the port P, the port A and the oil inlet, and then enters the actuator through the holes in various modes to lubricate operation devices.

If too much oil enters the interior of the actuator, a part of the oil will be discharged out of the actuator under the action of the vent hole and then merged into the oil cavity, and the oil pump 1 will perform oil suction recovery periodically.

When recovering oil, the three-position three-way electromagnetic valve is positioned at the second working position, the port P and the port T are communicated at the moment, the port A is closed, the oil pump 1 absorbs oil from the oil cavity, and the oil to be recovered flows back to the oil box 2 through the oil return port, the port T, the port P, the first oil port and the second oil port in sequence.

According to the utility model discloses an embodiment, the valves still includes flow control valve and overflow valve, and flow control valve is located the oil circuit between first hydraulic fluid port and the P mouth, and flow control valve is controlled by the controller, can adjust the lubricating oil volume that gets into in the oil chamber, and the overflow valve is located the oil circuit between first hydraulic fluid port and the oil box oil return opening, and the overflow valve can keep hydraulic unit's system pressure.

According to the utility model discloses an embodiment, oil pump and oil box set up the handle position at electric tool and fix on the inner wall of casing, and of course oil pump and oil box also can be external, and perhaps integrated into one piece is on hand, and the oil pump can be through oil pipe and oil inlet, oil return opening and 2 intercommunications of oil box, and the integrated into one piece oil circuit also can be directly on the casing of course.

The above embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by the technical solutions of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.

Claims

1. An electric power tool, characterized by comprising:

an actuator built in the housing, an oil chamber being formed between the actuating portion and the housing, the actuating portion having a hole communicating with the oil chamber;

and the hydraulic unit provides lubricating oil for the actuating part through the oil inlet and the hole, and the oil cavity collects oil and returns the oil through the oil return opening.

2. The power tool of claim 1, wherein the hydraulic unit comprises:

the oil pump (1), the said oil pump (1) is a two-way gear pump, the first hydraulic fluid port of the said oil pump (1) couples to said oil inlet and oil return port separately through the valve bank;

the second oil port of the oil pump (1) is communicated with the oil box (2);

the valve group comprises a three-position three-way electromagnetic valve, a port P of the three-position three-way electromagnetic valve is communicated with a first oil port of the oil pump (1), a port A of the three-position three-way electromagnetic valve is communicated with the oil inlet, and a port T of the three-position three-way electromagnetic valve is communicated with the oil return port.

3. The electric tool according to claim 2, wherein when the three-position three-way solenoid valve is in the initial position, the port P, the port a and the port T are all closed, when the three-position three-way solenoid valve is in the first working position, the port P and the port a are communicated, the port T is closed, the oil pump (1) supplies oil, when the three-position three-way solenoid valve is in the second working position, the port P and the port T are communicated, the port a is closed, and the oil pump (1) sucks oil from the oil chamber.

4. The power tool of claim 3, wherein the valve block further comprises a flow regulating valve positioned on the oil path between the first port and the P port and an overflow valve positioned on the oil path between the first port and the cartridge return port.

5. The power tool of claim 2, wherein the oil pump and the oil cartridge are disposed at a handle position of the power tool and fixed to an inner wall of the housing.

6. The power tool of claim 1, wherein the actuator is a cylinder having the bore defined therein, the bore further configured as a vent.

7. The electric tool as claimed in claim 6, wherein the striking pin (6) is mounted in the cylinder of the cylinder by means of a sleeve body (7), the piston of the cylinder drives the striking pin by means of a pneumatic hammer, the sleeve body (7), the pneumatic hammer (8) and the piston (9) are respectively sealed with the cylinder by means of Y-shaped sealing rings, and the hydraulic unit supplies lubricating oil for the sleeve body (7), the pneumatic hammer (8) and the piston (9).