CN108381473B

CN108381473B - Power tool and oil supply device for power tool

Info

Publication number: CN108381473B
Application number: CN201810060418.XA
Authority: CN
Inventors: 毋宏兵; 余鸿东; 孙开军; 缪海俊
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2017-01-20
Filing date: 2018-01-22
Publication date: 2022-01-18
Anticipated expiration: 2038-01-22
Also published as: CN108481268A; CN108481268B; CN108381472B; CN108381472A; CN108381473A

Abstract

A power tool and an oil supply device for the power tool, wherein the power tool includes a housing, the oil supply device includes an oil storage chamber provided in the housing, an oil filler pipe communicating with the oil storage chamber, and an oil supply device communicating with the oil filler pipe, and when the oil in the oil storage chamber is reduced, the oil can automatically flow from the oil supply device to the oil storage chamber through the oil filler pipe. The power tool and the oil supply device for the power tool provided by the invention have the advantages that the lubricating efficiency is improved, and the service life of a machine is prolonged.

Description

Power tool and oil supply device for power tool

Technical Field

The present invention relates to a power tool and an oil supply device for the power tool.

Background

When a power tool such as an electric hammer, an angle grinder and the like lubricates machine parts, an oil storage tank is usually arranged in a machine shell, but the internal space of the machine is limited, and after the oil storage tank is used for a period of time, oil is still required to be supplemented.

Three problems are easily caused when the oil supplementing operation is carried out: 1. the oil supplementing time can not be accurately judged, the oil supplementing times can be increased if the oil is supplemented too early, and the transmission mechanism is seriously damaged if the oil is supplemented too late; 2. the oil supplement amount can not be accurately controlled, the oil is wasted and leaked when the oil supplement amount is more, and the oil supplement frequency is increased when the oil supplement amount is less; 3. the oil is added after the parts are disassembled and assembled, and the operation is complex.

In addition, some power tools need to be additionally provided with an oil storage tank, and the oil storage tank needs to be carried in the working process to prevent the machine from being exhausted, so that the use of operators is inconvenient.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides an oil supply device for a power tool, which can supplement lubricating oil in time.

The technical scheme adopted by the invention for solving the problems in the prior art is as follows:

an oil supply device for a power tool, the power tool including a housing, the oil supply device including an oil reservoir provided in the housing, an oil filler pipe communicating with the oil reservoir, and an oil supply device communicating with the oil filler pipe, the oil being capable of automatically flowing from the oil supply device to the oil reservoir through the oil filler pipe when the oil in the oil reservoir is reduced.

Optionally, the refueling apparatus is removably connected to the housing.

Optionally, the refuelling device comprises a reservoir, pumping means housed at least partially within the reservoir and an outlet communicating with the reservoir, the pumping means allowing grease to flow from the reservoir to the outlet when grease in the reservoir is reduced.

Alternatively, the power tool includes an auxiliary handle connected to the housing, the auxiliary handle being hollow, and the fuel reservoir being located in the auxiliary handle.

Optionally, the oil supply device further includes a communication member connecting the oil filling pipe with the oil outlet, and the oil pumping device allows the grease to flow from the oil outlet into the oil filling pipe through the communication member when the grease in the oil reservoir chamber is reduced.

Optionally, the communication member is a hose.

Optionally, the oil pumping device comprises a power device and a moving part fixedly connected with the power device, when the grease in the oil storage cavity is reduced, the power device can be deformed to drive the moving part, so that the grease flows from the oil storage tank to the oil outlet under the pushing action of the moving part.

Optionally, the moving member is provided as a piston and abuts against an inner wall of the reservoir to form a seal.

Optionally, the power device is a compression spring.

Optionally, the oil storage amount of the oil storage tank is 10g or more.

Optionally, the outer wall of the fuel reservoir is at least partially provided with a transparent member.

Optionally, the oil filling pipe includes a first oil port communicated with the oil storage cavity, and a check valve is arranged in the oil filling pipe, and allows the grease to flow from the oil filling device to the first oil port and prevents the grease from flowing from the first oil port to the oil filling device.

Optionally, the oil storage chamber has an oil storage amount of 2g or more.

Optionally, the power tool further comprises:

an output shaft for receiving at least part of the working member;

a transmission mechanism for transmitting the motor power to the output shaft;

the hammering mechanism is driven by the motor to do linear reciprocating motion along the axis of the output shaft;

a cylinder for accommodating the hammer mechanism;

a bearing for supporting the cylinder in a radial direction;

the support comprises a front support close to the output shaft and a rear support far away from the output shaft, the oil storage chamber is provided with at least one oil outlet, and the projection of the oil outlet on the axis of the output shaft is positioned on one side of the front support facing the working part.

The invention provides a power tool for timely supplementing lubricating oil.

The technical scheme of the invention is as follows: a power tool comprises a shell and a motor contained in the shell, and the power tool also comprises the oil supply device.

Compared with the prior art, the power tool provided by the invention has the advantages that the lubricating oil is timely supplemented, so that the lubricating effect is good, the lubricating efficiency is improved, and the service life of the power tool is prolonged.

Drawings

The above objects, technical solutions and advantages of the present invention can be achieved by the following drawings:

fig. 1 is a sectional view of an electric hammer according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of an electric hammer according to another alternative embodiment of the present invention.

Fig. 3 is a cross-sectional view of an electric hammer according to another alternative embodiment of the present invention.

Fig. 4 is a sectional view of the oil reservoir portion of the electric hammer of fig. 1 according to the present invention.

Fig. 5 is a sectional view of an oil reservoir portion of an electric hammer according to another alternative embodiment of the present invention.

Fig. 6 is a sectional view of an oil reservoir portion of an electric hammer according to another alternative embodiment of the present invention.

Fig. 7 is a sectional view of an oil reservoir portion of an electric hammer according to another alternative embodiment of the present invention.

Fig. 8 is a cross-sectional view of an angle grinder of an embodiment of the present invention.

Fig. 9 is a cross-sectional view of an electric hammer according to another alternative embodiment of the present invention.

Detailed Description

As shown in fig. 1, an embodiment of the present invention provides a hand-held power tool electric hammer 1, where the electric hammer 1 includes a housing 10, and the housing 10 may be provided in a separate type or an integrated type, and the configuration of the housing 10 is not limited. The motor 11 is accommodated in the housing 10, the output shaft 13 is used for accommodating the working member 19, the transmission mechanism is used for transmitting the rotation power of the motor 11 to the output shaft 13, the hammering mechanism 12 is driven by the motor 11 to do linear reciprocating motion along the axis of the output shaft 13, and the hammering working member 19 does linear reciprocating motion along the axis of the output shaft 13.

The electric hammer 1 further includes an oil supply device including an oil reservoir 140 provided in the housing 10, a filler pipe 150 communicating with the oil reservoir 140, and the oil filling device 130, and the flow of the grease from the oil filling device 130 to the oil reservoir 140 through the filler pipe 150 is a flow path of the grease in the oil filling device, the flow path being operatively cut off or communicated.

Alternatively, the filler pipe 150 is provided in an "L" shape, and the filler pipe 150 includes a first oil port 150a communicating with the oil reservoir chamber, and a second oil port 150b operatively communicating with the oil filling device 130.

The refueling apparatus 130 includes a fuel tank 131, a pumping device 132 at least partially housed in the fuel tank 131, and a fuel outlet 133 communicating with the fuel tank 131.

As shown in fig. 1, in one embodiment, the electric hammer 1 includes an auxiliary handle connected to the housing 10, the auxiliary handle being provided to be hollow, and a fuel reservoir 131 being provided in the auxiliary handle. Optionally, the refueling device 130 is an auxiliary handle on the electric hammer 1, the refueling device 130 is detachably connected to the housing 10, the refueling device 130 is connected to the housing 10 through a clip 134, the clip 134 is sleeved on the casing 10, an accommodating hole (not shown) is formed in one end of the clip facing the refueling device 130, a bolt 135 is accommodated in the accommodating hole, a nut 136 matched with the bolt 135 is integrated with the refueling device 130, the refueling device 130 is detachably connected to the housing 10 by providing an external thread on the bolt 135 and an internal thread on the nut 136, and of course, a person skilled in the art may also use other ways to detachably connect the housing 10 to the refueling device 130. In use, the oiling device 130 can be used as an auxiliary handle to make the operator hold the electric hammer easily, and can supply oil to the oil storage cavity in the electric hammer by using the auxiliary handle.

Optionally, the bolt 135 is hollow, and the oil outlet 133 is integrally formed with the bolt 135 and located at an end of the bolt 135 facing the collar 134. Thus, when the flow paths are communicated, the oil pumping device 132 allows the grease to flow from the oil reservoir 131 to the oil outlet 133 along the hollow pipe inside the bolt 135.

In one embodiment, as shown in fig. 2, the refueling unit 130 may be configured as a syringe, and the refueling unit 130 may be detachably connected to the housing 10. The oil reservoir 131 is provided as an inner chamber of the fueling device 130, and the oil outlet 133 is provided at one end of the fueling device 130 to communicate with the oil reservoir 131. When the oil filling pipe 150 is butted with the oil outlet 133, the oil filling device 130 is connected with the housing 10; when the filler pipe 150 is separated from the oil outlet 133, the oiling device 130 is removed from the housing 10.

In another embodiment, as shown in fig. 3, the refueling unit 130 is configured as a push pump type, and the refueling unit 130 is disposed outside the housing 10 and is fixedly connected to the housing 10. Alternatively, the fueling device 130 has one end fixed in the longitudinal direction of the housing 10 and the other end fixed in the vertical direction of the housing 10.

In an embodiment, as shown in fig. 1, the oil supply apparatus further includes a communication member 160 connecting the oil filling pipe 150 and the oil outlet 133, and when the flow paths are communicated, the grease can flow from the oil outlet 133 into the oil filling pipe 150 through the communication member 160. Optionally, the communication member 160 is a hose, and two ends of the hose are respectively sleeved with the second oil port 150b and the oil outlet 133.

In one embodiment, the oil pumping device 132 includes an operating member 1320 and a moving member 1321 connected to the operating member 1320, and the operating member 1320 is operable to drive the moving member 1321 to move, so that the grease flows from the oil reservoir 131 to the oil outlet 133 under the pushing action of the moving member 1321.

Alternatively, referring to fig. 2, the operation member 1320 is integrally provided with the moving member 1321. The operating member 1320 is provided as a push rod, and the moving member 1321 is provided as a piston fixedly connected to the push rod, and an outer wall of the piston abuts against an inner wall of the oil reservoir 131 to form a seal. When the operator pushes the push rod in the direction of the outlet port 133, the piston pushes the grease from the reservoir 131 to the outlet port 133.

In another embodiment, referring to fig. 1, the oil pumping device 132 further includes a transmission member 1322 fixedly connected to the moving member 1321, the operation member 1320 is operable to drive the transmission member 1322 to move, and the transmission member 1322 drives the moving member 1321 to move, so that the grease flows from the oil storage tank 131 to the oil outlet 133 under the action of the moving member 1321.

Alternatively, operating member 1320 is provided as a knob, moving member 1321 is provided as a piston, and transmission member 1322 is provided as a screw coupled to operating member 1320 and moving member 1321. An operator rotates the knob, the knob drives the screw to move, and the screw drives the piston to move, so that the grease flows from the oil storage tank 131 to the oil outlet 133 under the action of the piston.

In one embodiment, the oil pumping device 132 includes an operating member 1320, a moving member 1321 fixedly connected to the operating member 1320, a pump body 1322b communicated with the oil reservoir 131, an elastic member 1322c located in the pump body 1322b, an exhaust valve 1322d located between the moving member 1321 and the elastic member 1322c, and an intake valve 1322e located between the elastic member 1322c and the oil reservoir 131, wherein the operating member 1320 is operable to drive the moving member 1321 to move, and the moving member 1321 pushes grease from the oil reservoir 131 to the oil outlet 133 under the action of the liquid pressure.

Alternatively, referring to fig. 3, the operating member 1320 is a pressing rod, the moving member 1321 is a piston, and the elastic member 1322c is a spring. Alternatively, the oil outlet line 1323 is connected with the operating member 1320 without relative movement, and the exhaust valve 1322d is provided as a circular hole in the tip end of the oil outlet line 1323; the intake valve 1322e is provided as a ball between the oil reservoir 131 and the elastic member 1322 c.

The fueling device 130 discharges air in the pump body 1322b by the movement of the movable member 1321, thereby causing a difference in internal and external air pressures, and the grease rises by the air pressure and is discharged from the reservoir 131 to the outlet 133. When the operator presses the operating member 1320, the elastic member 1322c is compressed, the exhaust valve 1322d, which is previously shielded by the moving member 1321, is exposed, the exhaust valve 1322d is opened, and the elastic member 1322c is compressed, so that the intake valve 1322e is closed downward, and grease in the pump body 1322b flows out of the oil outlet 133 through the oil outlet pipe 1323, and flows to the oil filling pipe 150 through the communicating member 160; when the operator releases the operating member 1320, the elastic member 1322c returns to its original natural state, so that the movable member 1321 moves upward, the exhaust valve 1322e is closed, the inlet valve 1322c is opened, and grease enters the pump body 1322b from the oil guide pipe 1322a through the inlet valve 1322c under the action of the external atmospheric pressure. In this way, the movable element 1321 reciprocates up and down in the pump body 1322b, and the grease is sucked out of the oil reservoir 131.

Further, as shown in fig. 1, 2 and 3, the outer wall of the oil storage tank 131 is at least partially provided with a transparent member 130a, and optionally, the transparent member 130a is marked with a scale, and an operator can easily see the volume of the grease in the oil storage tank 131 by observing the transparent member 130a or the scale on the transparent member 130 a.

Further, as shown in fig. 1, a check valve 133a is provided in the filler pipe 150, and the check valve 133a allows the grease to flow from the oiling device 130 to the first oil port 150a and prevents the grease from flowing from the first oil port 150a to the oiling device 130. The provision of the check valve 133a in the filler pipe 150 prevents the grease from leaking out of the filler pipe 150 to cause unnecessary waste when the communication member 160 is pulled out or the grease adding apparatus 130 is removed.

In consideration of the frequency of refueling the oil reservoir 140 by the refueling device 130, the oil reservoir 131 has an amount of 10g to 50g, alternatively, the oil reservoir 131 has an amount of 25g, and the oil reservoir 131 has an amount of 25g that can satisfy the entire life cycle of the electric hammer, so that the operator does not need to disassemble and assemble the machine to add the lubricating oil.

In one embodiment, referring to fig. 1 and 4, the oil storage chamber 140 is disposed between the output shaft 13 and the housing 10, the oil storage chamber 140 is provided with at least one oil outlet 140a, the output shaft 13 is provided with at least one oil inlet 13a, when the oil inlet 13a and the projection of the oil outlet 140a on the axis of the output shaft 13 at least partially coincide, the working member 19 reciprocates to generate a suction force, and grease can flow into the oil inlet 13a from the oil outlet 140a to lubricate the handle of the working member 19.

Optionally, the oil inlet 13a and the oil outlet 140a completely coincide in projection on the axis of the output shaft 13.

In one embodiment, referring to fig. 1, the cylinder 14 is configured to receive the hammering mechanism 12, and the support is configured to support the cylinder 14 in a radial direction. As shown in fig. 1, the support member includes a front support 16 disposed close to the output shaft 13 and a rear support 17 disposed far from the output shaft 13, and the oil outlet 140a is located on the side of the front support 16 facing the working member 19 in projection on the axis of the output shaft 13.

Alternatively, the front bearing 16 is configured as a rolling bearing and the rear bearing 17 is configured as a sealing bearing, which not only serves to support the cylinder 14, but also blocks the flow of grease in the oil reservoir 140 to the side of the rear bearing 17 remote from the working part 19, on the one hand, and blocks the flow of grease in the side of the rear bearing 17 remote from the working part 19 to the oil reservoir 140, on the other hand. Thus, the grease in the reservoir chamber 140 can lubricate the shank of the working element 19 alone, and the grease in the rest of the housing 10 does not leak out.

In one embodiment, referring to fig. 1, the output shaft 13 is axially slidably connected to the cylinder 14 under the action of the hammering mechanism 12. As the hammering mechanism 12 linearly reciprocates along the axis of the output shaft 13, the output shaft 13 also reciprocates in the axial direction, and the projection positions of the oil inlet 13a and the oil outlet 140a on the axis of the output shaft 13 also change continuously. When the movement of the output shaft 13 makes the oil inlet 13a and the projection of the oil outlet 140a on the axis of the output shaft 13 at least partially coincide, grease can flow from the oil outlet 140a into the oil inlet 13a, thereby lubricating the handle of the working member 19.

Alternatively, the output shaft 13 is restricted in the relative position to the cylinder 14 in the axial direction by a coupling unit including a groove 13b provided on the output shaft 13, a housing hole 14b provided on an outer wall of the cylinder 14 opposite to the groove 13b, and a fixing member 15 at least partially housed in the groove 13b and the housing hole 14 b. Optionally, the fixing 15 is a steel ball. Of course, the fixing member 15 may take other forms such as a cylindrical pin. Further, a fastening member 18 is fixedly sleeved on the outer periphery of the cylinder 14 to prevent the fixing member 15 from being pulled out of the cylinder 14.

As shown in fig. 1 and 4, in one embodiment, the oil reservoir chamber 140 is mounted inside the housing 10 and is formed as a separate component of the housing 10.

In one embodiment, as shown in fig. 5, the housing 10 includes a first housing 100 that houses the motor 11 and a second housing 110 that at least partially houses the output shaft 13, and the oil reservoir chamber 140 is formed by an inner space of the second housing 110. Optionally, the second housing 110 is configured as a shroud such that the second housing both circumscribes the dust boot 104 and forms an oil reservoir.

As shown in fig. 6, in an embodiment, the oil reservoir chamber 140 is provided between the output shaft 13 and the housing 10, and optionally, the oil reservoir chamber 140 is provided between the output shaft 13 and the first housing 100. Further, the oil reservoir 140 is provided as a cavity surrounded by the bearing 101, the stopper 102, the seal ring 103, and the output shaft 13 housed in the first housing 100, so that the internal space of the electric hammer can be fully utilized to reduce the volume of the electric hammer.

The number of the oil inlets 13a and the oil outlets 140a may be 1 or more, and optionally, the number of the oil inlets 13a and the oil outlets 140a is 1.

Alternatively, the oil outlet 140a is provided as an annular hole that surrounds the output shaft 13 radially one round.

In addition, in order to prevent an excessive amount of grease from flowing into the oil reservoir chamber 140, the diameter of the oil inlet 13a is set between 0.5mm and 0.7 mm. The diameter of the oil inlet 13a should not be too large, so as to prevent grease waste and leakage.

In one embodiment, the oil reservoir 140 has an amount of oil between 2g and 8g, and optionally the amount of oil reservoir in the oil reservoir 140 is 2 g. The oil storage amount in the oil storage cavity 140 is set to 2g, so that the grease lubrication requirement of the electric hammer for a period of time can be met, and excessive internal space of the electric hammer can not be occupied.

Alternatively, as shown in fig. 4, the oil reservoir chamber 140 further includes an oil inlet 140b for supplying grease into the oil reservoir chamber 140 through the oil inlet 140b when the grease in the oil reservoir chamber 140 is insufficient.

The oil pumping device 132 enables the grease to move from the oil storage tank 131 to the oil outlet 133, the grease flows from the oil outlet 133 to the oil filling pipe 150 and then flows into the oil storage chamber 140, and the grease flows from the oil outlet 140a on the oil storage chamber 140 to the oil inlet 13a, so that the hammer handle of the electric hammer is lubricated. Therefore, the whole oil filling action is automatically completed without the need of an operator to fill oil through a dismounting machine in the life cycle of the whole electric hammer.

In one embodiment, as shown in fig. 7, the cylinder 14 is connected to the output shaft 13 without relative axial movement, and alternatively, the cylinder 14 is provided integrally with the output shaft 13. Of course, the cylinder 14 and the output shaft 13 may be fixedly connected by a pin or other fastening means known to those skilled in the art. At this time, the projection of the oil outlet 140a and the oil inlet 13a on the axis of the output shaft 13 always at least partially coincide, and since the output shaft 13 is integrally provided with the cylinder 14, the grease can always flow from the oil storage chamber 140 through the oil outlet 140a, then enter the oil outlet 13a, and finally flow into the handle portion of the working member 19.

Referring to fig. 8, another alternative embodiment of the present invention provides an electric tool, such as an angle grinder 2, having a similar structure to that of the first embodiment, and for convenience of description, the same structure is not repeated, and different structures are specifically described below.

The angle grinder 2 includes a housing 20, and the housing 20 includes a main housing 21 and a reduction gear housing 22 connected to the main housing 21. The motor 23 is housed in the main casing 21, and the transmission mechanism 24 is housed in the reduction gear casing 22. The power generated by the motor 23 is transmitted to the working member 19 via the transmission mechanism 24.

The angle grinder 2 further includes an oil supply device including an oil filling device 230, an oil storage chamber 240 provided in the housing 20, and an oil filling pipe 250 communicating with the oil storage chamber 240. The filler pipe 250 includes a first port 250a communicating with the oil reservoir chamber 240, and optionally the oil reservoir chamber 240 is provided in the reduction gearbox housing 22, and the flow of grease from the oiling device 230 through the filler pipe 250 to the oil reservoir chamber 240 is a flow path for the grease in the oiling device, which is operatively shut off or communicated.

The specific structure of the refueling device 230 may be selected from any refueling device in the above embodiments, and details are not described herein.

Referring to fig. 9, another alternative embodiment of the present invention provides a power tool such as an electric hammer 3, in which the electric hammer 3 includes a housing 30, and the housing 30 may be formed in a single body or in a single body, and the form of the housing 30 is not limited. The motor 31 is housed in the housing 30, the output shaft 33 is configured to house the working member 39, the transmission mechanism is configured to transmit the rotational power of the motor 31 to the output shaft 33, the hammer mechanism 12 is driven by the motor 31 to reciprocate linearly along the axis of the output shaft 33, and the hammer working member 39 reciprocates linearly along the axis of the output shaft 33.

The electric hammer 3 further includes an oil supply device including an oil reservoir chamber 340 provided in the housing 30, a filler pipe 350 communicating with the oil reservoir chamber 340, and an oiling device 330 communicating with the filler pipe 350, and when the grease in the oil reservoir chamber 340 is reduced, the grease can automatically flow from the oiling device 330 to the oil reservoir chamber 340 through the filler pipe 350.

Alternatively, the filler pipe 350 is provided in an "L" shape, and the filler pipe 350 includes a first oil port 350a communicating with the oil reservoir chamber 340, and further includes a second oil port 350b operatively communicating with the oil filling device 330.

The refueling unit 330 includes a fuel tank 331, a pumping unit 332 at least partially housed in the fuel tank 331, and a fuel outlet 333 communicating with the fuel tank 331.

As shown in fig. 9, in an embodiment, the oil filling device 330 is configured as an auxiliary handle on the electric hammer 3, the oil filling device 330 is detachably connected to the housing 30, optionally, the oil filling device 330 is connected to the housing 30 through a clip 334, the clip 334 is sleeved on the machine shell 30, an end of the clip facing the oil filling device 330 is provided with a receiving hole (not shown), a bolt 335 is received in the receiving hole, a nut 336 matched with the bolt 335 is integrated with the oil filling device 330, the detachable connection of the oil filling device 330 to the housing 30 is realized by providing an external thread on the bolt 335 and an internal thread on the nut 336, and of course, a person skilled in the art can also adopt other ways to realize the detachable connection of the housing 30 and the oil filling device 330. In the using process, the oiling device 330 can be used as an auxiliary handle to enable an operator to hold the electric hammer easily, and can supply oil to the oil storage cavity in the electric hammer by utilizing the auxiliary handle.

Alternatively, bolt 335 is hollow, and oil outlet 333 is integral with bolt 335 and is located at an end of bolt 335 facing toward clamp 334. Thus, when the flow paths are communicated, the oil pumping means 332 allows the grease to flow from the oil reservoir 331 to the oil outlet 333 along the hollow pipe inside the bolt 335.

In one embodiment, as shown in fig. 9, the oil supply apparatus further includes a communication member 360 connecting oil filling pipe 350 and oil outlet 333, and when the grease in oil reservoir chamber 331 decreases, the grease can flow from oil outlet 333 into oil filling pipe 350 through communication member 360. Optionally, the communication member 360 is a hose, and two ends of the hose are respectively sleeved with the second oil port 350b and the oil outlet 333.

In one embodiment, the oil pumping device 332 comprises a power device 3321 and a moving member 3322 connected to the power device 3321, and when the grease in the oil storage chamber 340 is reduced, the power device 3321 can be deformed to drive the moving member 3322 to move, so that the grease flows from the oil storage tank 331 to the oil outlet 333 under the pushing action of the moving member 3322.

Alternatively, the power means is provided as a compression spring. Of course, the power unit 3321 may be provided in other ways as would occur to those skilled in the art, such as by providing the power unit as a motor.

Alternatively, the moving member 3322 is provided as a piston connected to the power unit 3321, and the outer wall of the piston abuts against the inner wall of the oil reservoir 331 to form a seal.

Further, as shown in fig. 9, the outer wall of the refueling unit 330 is at least partially provided with a transparent member 330a, and optionally, the transparent member 330a is marked with a scale. By observing the scale on the transparent member 330a, the operator can easily see the volume of the grease in the reservoir 340.

Further, a check valve 333a is provided in the fueling port 350, and the check valve 333a allows the grease to flow from the fueling device 330 to the first port 350a and prevents the grease from flowing from the first port 350a to the fueling device 350. The provision of the check valve 333a in the filler neck 350 prevents the leakage of grease from the filler pipe 350 and the unnecessary waste when the communication member 360 is pulled out or the oiling device 330 is removed.

Based on the consideration of the frequency of filling the oil reservoir 340 with the oil filling device 330, the oil reservoir 331 has an oil reservoir amount of 10g to 50g and the oil reservoir has an oil reservoir amount of 2g to 5 g.

Alternatively, the oil reservoir 331 has an oil reservoir amount of 25g, and the oil reservoir of the oil reservoir is set to an oil amount for lubrication that can satisfy the entire life cycle of the electric hammer, so that the operator does not need to attach or detach the machine to add the lubricating oil.

In one embodiment, a cylinder 34 is used to house the hammer mechanism 32 and bearings are used to support the cylinder 34 in a radial direction. As shown in fig. 9, the support member includes a front support 36 disposed close to the output shaft 33 and a rear support 37 disposed far from the output shaft 33, and the oil outlet 340a is located on the side of the front support 36 toward the working member 39 as projected on the axis of the output shaft 33.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An oil supply arrangement for a power tool, the power tool including a housing, the oil supply device comprises an oil storage cavity arranged in the shell, an oil filling pipe communicated with the oil storage cavity and an oil supply device communicated with the oil filling pipe, when the grease in the grease storage cavity is reduced, the grease can automatically flow from the oiling device to the grease storage cavity through the oiling pipe, the refueling device comprises an oil storage tank, an oil pumping device at least partially accommodated in the oil storage tank and an oil outlet communicated with the oil storage tank, the oil pumping device comprises a power device and a moving part fixedly connected with the power device, when the grease in the oil storage cavity is reduced, the power device can be deformed to drive the moving part, so that the grease flows from the oil storage tank to the oil outlet under the pushing action of the moving part.

2. The fuel supply of claim 1 wherein said fuel filling apparatus is removably connected to said housing.

3. The fuel supply of claim 1 wherein said power tool includes an auxiliary handle connected to said housing, said auxiliary handle being hollow, said fuel reservoir being located in said auxiliary handle.

4. The oil supply apparatus according to claim 1, wherein said oil supply apparatus further comprises a communication member connecting said oil filling pipe with an oil outlet, and said oil pumping means allows the flow of the grease from said oil outlet into said oil filling pipe through said communication member when the grease in said oil reservoir chamber is reduced.

5. The oil supply of claim 4 wherein said communication member is a hose.

6. The fuel supply of claim 1 wherein said moving member is configured as a piston and forms a seal against an interior wall of said fuel reservoir.

7. The oil supply of claim 1 wherein said power means is a compression spring.

8. The fuel supply apparatus according to claim 1, wherein the amount of fuel stored in the fuel storage tank is 10g or more.

9. The fuel supply of claim 1, wherein the outer wall of the fuel reservoir is at least partially provided with a transparent member.

10. The oil supply apparatus of claim 1, wherein the filler pipe includes a first port in communication with the oil reservoir, and a check valve is disposed in the filler port, the check valve allowing the grease to flow from the oil filling apparatus to the first port and preventing the grease from flowing from the first port to the oil filling apparatus.

11. The oil supplying apparatus according to claim 1, wherein an oil storage amount of said oil storage chamber is 2g or more.

12. The oil supply device according to claim 1, wherein the power tool further comprises:

a housing and a motor housed within the housing;

an output shaft for receiving at least part of the working member;

a transmission mechanism for transmitting the motor power to the output shaft;

a cylinder for accommodating the hammer mechanism;

a bearing for supporting the cylinder in a radial direction;

13. A power tool comprising a housing and a motor housed in the housing, characterized by further comprising an oil supply device according to any one of claims 1 to 12.