CN212969407U

CN212969407U - Linear electromagnetic power machine and power tool

Info

Publication number: CN212969407U
Application number: CN202021718441.2U
Authority: CN
Inventors: 胡方坤; 丁学明; 朱学超
Original assignee: Suzhou Pinjiang Electromechanical Technology Co ltd
Current assignee: Suzhou Pinjiang Electromechanical Technology Co ltd
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2021-04-13
Anticipated expiration: 2030-08-18

Abstract

The utility model discloses a linear electromagnetic power machine and power tool, wherein linear electromagnetic power machine, including support frame stator and active cell, still be provided with the active cell fitting piece on the support frame, be provided with on the active cell can reciprocating motion's stator fitting piece in the active cell fitting piece, be formed with the recess on the contact surface of stator fitting piece and/or active cell fitting piece. According to the scheme, the stator matching piece and the rotor matching piece are arranged, and the grooves are formed in the joint surfaces of the stator matching piece and the rotor matching piece, so that the contact area between the stator matching piece and the rotor matching piece can be effectively reduced, friction is reduced, the damage of parts and the generated heat are reduced, the running speed of the rotor is improved, and the output power is increased.

Description

Linear electromagnetic power machine and power tool

Technical Field

The utility model belongs to the technical field of power tool and specifically relates to straight line electromagnetic power machine and power tool.

Background

The linear motor is a transmission device which directly converts electric energy into linear motion mechanical energy without any intermediate conversion mechanism, the linear electromagnetic power machine generally comprises a support frame, a stator and a rotor, the rotor is movably arranged on the support frame and keeps a gap with the stator, when the linear motor works, the rotor linearly moves in a reciprocating mode relative to the stator and the support frame, and a large amount of friction exists between the rotor and the support frame when the rotor moves in the reciprocating mode, so that abrasion among components is increased, heat is generated on the other hand, and more requirements are provided for heat dissipation when the linear motor is used.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems in the prior art and providing a linear electromagnetic power machine and a power tool adopting the same.

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

the linear electromagnetic power machine comprises a support frame stator and a rotor, wherein the support frame is also provided with a rotor matching piece, the rotor is provided with a stator matching piece capable of moving in a reciprocating mode in the rotor matching piece, and a groove is formed in a contact surface of the stator matching piece and/or the rotor matching piece.

Preferably, in the linear electromagnetic power machine, the support frame includes a first end and a second end that are arranged coaxially with each other at a gap, and the first end and the second end are arranged at two ends of the stator.

Preferably, in the linear electromagnetic power machine, the rotor mating part is a graphite copper sleeve.

Preferably, in the linear electromagnetic power machine, a circle of through groove is formed on the rotor mating member.

Preferably, in the linear electromagnetic power machine, the stator fitting part is a magnetic conductive sleeve body.

Preferably, in the linear electromagnetic power machine, a circle of grooves which are opposite to the grooves on the rotor mating part one by one are formed on the stator mating part;

or a circle of grooves which are staggered with the grooves on the rotor mating part one by one are formed on the stator mating part.

Preferably, in the linear electromagnetic power machine, the groove on the stator fitting piece is not a through groove, and a lubricating medium is arranged in the groove.

Preferably, in the linear electromagnetic power machine, the volume of the lubricating medium is between 3/10 and 1/2 of the volume of the groove, and is preferably about 1/3.

Preferably, in the linear electromagnetic power machine, the width of the groove is between 1/3 and 2/3 of the distance between adjacent grooves, preferably about 1/2.

The power tool comprises the linear electromagnetic power machine.

The utility model discloses technical scheme's advantage mainly embodies:

according to the scheme, the stator matching piece and the rotor matching piece are arranged, and the grooves are formed in the joint surfaces of the stator matching piece and the rotor matching piece, so that the contact area between the stator matching piece and the rotor matching piece can be effectively reduced, friction is reduced, the damage of parts and the generated heat are reduced, the running speed of the rotor is improved, and the output power is increased.

The through grooves are formed in the rotor matching piece, so that heat dissipation channels can be effectively increased, friction is reduced, ventilation is increased, and heat dissipation efficiency is improved.

The contact area can be doubled by the staggered arrangement of the grooves on the rotor matching piece and the stator matching piece, and the friction is reduced.

The stator matching piece is provided with the non-through groove, a lubricating medium, particularly a lubricating medium, can be arranged in the non-through groove, and the lubricating medium can emit oil gas to lubricate the joint surfaces of the stator matching piece and the rotor during working, so that friction is further reduced.

The stator fitting piece adopts a magnetizer to reduce the length of the rotor.

Drawings

FIG. 1 is a front cross-sectional view of a linear electromagnetic power machine of the present invention;

fig. 2 is an end sectional view of the linear electromagnetic power machine according to the present invention, wherein the groove positions on the stator mating member and the rotor mating member are aligned;

fig. 3 is an end sectional view showing the dislocation of the grooves on the stator mating part and the mover mating part of the linear electromagnetic power machine according to the present invention.

Detailed Description

Objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments. These embodiments are merely exemplary embodiments for applying the technical solutions of the present invention, and all technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the scope of the present invention.

In the description of the embodiments, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the embodiment, the operator is used as a reference, and the direction close to the operator is a proximal end, and the direction away from the operator is a distal end.

The linear electromagnetic power machine disclosed in the present invention is described below with reference to the accompanying drawings, as shown in fig. 1, the linear electromagnetic power machine generally includes a support frame 110, a stator 120, and a rotor 130, wherein the rotor 130 reciprocates linearly along the support frame 110 under the action of electromagnetic thrust, and the specific structure of the linear electromagnetic power machine may refer to the structure disclosed in application No. 202010278382. X.

In a more preferred embodiment, in order to reduce the size chain of the linear electromagnetic power machine and reduce the contact area between the mover and the first end 111 and the second end 112 of the supporting frame 110, the following improvements are made on the basis of the above-mentioned prior patents:

as shown in fig. 1, two mover mating parts 140 are respectively disposed in the first end 111 and the second end 112, the two mover mating parts 140 are coaxial, two ends of a mover supporting part of the mover 130 are sleeved with stator mating parts 150 respectively contacting with one mover mating part 140, and the mover mating parts 140 are sleeved on the outer peripheries of the stator mating parts 150 and can move relative to each other.

The mover mating member 140 may be made of various non-magnetic materials, preferably a graphite copper sleeve, and as shown in fig. 2 and fig. 3, a set of grooves 141 is formed on a hole wall of a central hole of the graphite copper sleeve, the number of the grooves 141 is selected according to needs, preferably 4-8, and more preferably 6 or 8, and the shape of the grooves may be designed according to needs, for example, the grooves are ring grooves, or the grooves are straight grooves, wavy grooves, arc grooves, or the like. Preferably, the plurality of grooves 141 are straight grooves, the extending direction of each groove 141 is parallel to the extending direction of the axis of the mover fitting 140, the grooves equally divide the circumference of the center hole of the mover fitting 140, the width of each groove is 1/3-2/3 of the distance between adjacent grooves, the width of each groove 141 is preferably about half of the distance between adjacent grooves 141, and the depth of each groove is designed according to the thickness and the requirement of the graphite copper sleeve.

Furthermore, the groove 141 is a through groove, that is, two ends of the groove 141 extend to end faces of two ends of the mover fitting 140, so that not only is the contact area between the mover fitting 140 and the stator fitting 150 effectively reduced, but also ventilation and heat dissipation can be effectively achieved. The structure of the through groove is easier to process, and the processing difficulty is reduced.

The stator mating element 150 is preferably a magnetic conductor, preferably military grade iron DT4, and is used to either magnetically conduct or mate with the mover mating element 140, thereby reducing the length of the mover 130. Meanwhile, as shown in fig. 2 and fig. 3, grooves 151 may also be formed on the hole wall of the central hole of the stator fitting 150, and the number and the positions of the grooves 151 may be in one-to-one correspondence with the grooves 141 on the mover fitting 140. Of course, in another embodiment, the groove 141 on the mover fitting 141 and the groove 151 on the stator fitting 150 may be disposed in a staggered manner, and in such a structure, the contact area therebetween may be further reduced. The width of the grooves 151 is between 1/3-2/3, more preferably about half the pitch of adjacent grooves 151.

The groove 151 of the stator fitting 150 may also be a through groove, and more preferably, as shown in fig. 2, the groove is closed at both ends, so that a lubricating medium 160 may be provided in the groove 151, the volume of the lubricating medium being between 3/10 and 1/2 of the volume of the groove, the volume of the lubricating medium being around 1/3 of the volume of the groove 151. In order to ensure that the lubricating medium 160 does not leak, the length of the stator fitting 150 is smaller than that of the mover fitting 140, and the length of the groove 151 is such that both ends of the groove 151 are not exposed outside both ends of the mover fitting 140 when the stator fitting 150 moves in the mover fitting 140.

During operation, the lubricating medium 160 can emit oil gas, which is beneficial to lubrication on a matching surface, and meanwhile, when the grease slides to the two ends, the grease cannot leak because the two ends are not communicated due to the inertia force. The lubricating medium is selected according to the actual operating temperature and speed. The scheme preferably selects IP 2. Of course, the lubricating medium 160 may be other lubricating media, such as graphite powder.

In addition, in order to limit and buffer the mover 130 of the linear electromagnetic power machine during actual operation, a buffer (first shown in the figure) is further disposed at a proximal end (left end) of the mover 130, where the buffer may be any one of various known materials having a deformation capability, such as a rubber pad, a sponge pad, a soft plastic pad, a silicone pad, and a spring, and may be fixed to the mover 130 or may be fixed to an outer side of an end portion of the mover 130, and when the mover retracts, the proximal end of the mover contacts the buffer.

Meanwhile, a magnetic attraction mechanism (not shown) is further arranged at the near end (left end) of the mover 130, the magnetic attraction mechanism comprises a magnet (not shown) and an object which can be magnetically attracted by the magnet, and the magnet is used for limiting the mover to a certain extent by adsorbing the object located on the mover.

Of course, in other embodiments, the stator 120 may also be at least one electromagnet located at one end of the support frame, the mover 130 is an object that can be attracted by the magnetic force of the electromagnet and slide along the support frame, and the mover 130 is further connected to a spring that drives the mover to return after the magnetic force of the electromagnet disappears, and at this time, a stator mating part is disposed on the object. In another embodiment, two electromagnets may be disposed on the supporting frame, and a mover 130 magnetically attracted by the electromagnets may be disposed between the two electromagnets.

The scheme further discloses a power tool which can be a nail gun, a rivet pulling gun, an impact gun, an automatic inflator, an automatic high-pressure water gun, an electric pick and the like and comprises the linear electromagnetic power machine, other structures of the power tool can be selected according to needs, the power tool is specifically the known technology, and the power tool is not limited in the technology.

The utility model has a plurality of implementation modes, and all technical schemes formed by adopting equivalent transformation or equivalent transformation all fall within the protection scope of the utility model.

Claims

1. Linear electromagnetic power machine, including support frame, stator and active cell, its characterized in that: the supporting frame is internally provided with a rotor matching piece, the rotor is provided with a stator matching piece capable of moving back and forth in the rotor matching piece, and a groove is formed on the contact surface of the stator matching piece and/or the rotor matching piece.

2. The linear electromagnetic power machine of claim 1, further comprising: the support frame comprises a first end and a second end which are arranged coaxially in a gap, and the first end and the second end are arranged at two ends of the stator.

3. The linear electromagnetic power machine of claim 1, further comprising: the rotor matching piece is a graphite copper sleeve.

4. The linear electromagnetic power machine of claim 1, further comprising: and a circle of through groove is formed on the rotor matching piece.

5. The linear electromagnetic power machine of any one of claims 1-4, further comprising: the stator fitting piece is a magnetic conduction sleeve body.

6. The linear electromagnetic power machine of claim 1, further comprising:

a circle of grooves which are opposite to the grooves on the rotor matching piece one by one are formed on the stator matching piece;

7. The linear electromagnetic power machine of claim 6, wherein: and a groove non-through groove on the stator fitting piece is internally provided with a lubricating medium.

8. The linear electromagnetic power machine of claim 7, wherein: the volume of the lubricating medium is smaller than the volume of the groove.

9. The linear electromagnetic power machine of claim 6, wherein: the width of the groove is 1/2 the distance between adjacent grooves.

10. A power tool, characterized in that: comprising a linear electromagnetic power machine according to any of claims 1-9.