CN203390895U

CN203390895U - Impact device for carrying out impact operation and machine tool

Info

Publication number: CN203390895U
Application number: CN201320389403.0U
Authority: CN
Inventors: 陈振宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-07-02
Filing date: 2013-07-02
Publication date: 2014-01-15
Anticipated expiration: 2023-07-02

Abstract

The utility model relates to an impact device for carrying out impact operation and a machine tool. The impact device comprises a power driving output part, an impact part, an impact transfer part and a guide part; the power driving output part is used for providing power and is provided with a reciprocating part; the reciprocating part outputs the reciprocating motion to enable the impact part to reciprocate along the impact operation direction and applies a first acting force to the impact transfer part to enable the impact transfer part to implement the impact operation on a machined object; the guide part is used for at least guiding the reciprocating part and the impact transfer part, also comprises an eccentric compression part associated with the reciprocating part and is set to enable the reciprocating part to apply a second acting force to the impact transfer part directly or by the guide part; and the direction of the second acting force is the same with that of the first acting force. According to the utility model, sky hammer prevention ability can be improved, the impact reacting force is effectively adsorbed, and service life and comfort are improved.

Description

For impacting percussion mechanism and the toolroom machine of operation

Technical field

The utility model relates to percussion mechanism, relates in particular to a kind of toolroom machine for impacting the percussion mechanism of operation and being provided with this percussion mechanism, especially hand held power machines such as hand-held hammer drill or jump bit.

Background technology

In the prior art, the percussion mechanism that impacts operation for processing object generally includes an element that is called as anvil iron (Anvil) or parallels, this anvil iron or parallels can axially movably be directed in guiding parts, and guiding parts conventionally carries out relative fixing with whole toolroom machine and can not on impact direction, produce and relatively move, and comprise a drive motors at driving side, by reciprocation conversion mechanism, the rotation of this drive motors is converted to the reciprocating motion of piston, a jump bit (Hammer) is set between piston and anvil iron or parallels, this jump bit, between piston, can form airtight air spring, so that piston can drive jump bit to produce reciprocal hammering campaign, in percussion mechanism, make jump bit along impacting operative orientation, apply impact to anvil iron or parallels.This impact energy is delivered to it by this anvil iron or parallels on the end of driving side of the cutter that is installed in tool mounting (bit) of contact, and impact energy is delivered on processed object by this cutter again.Impact reactive force can be transmitted out by above-mentioned guiding parts.

Although the toolroom machine that has had so far a lot of these type of percussion mechanisms and there is such percussion mechanism, particularly hand-held hammer drill or jump bit etc., and there are a lot of patent documentations to carry out large quantity research to it, the part yet these existing percussion mechanisms and toolroom machine also come with some shortcomings at aspects such as structural design, serviceability, security performances, need to improve and optimize.

For example, in patent documentation EP2394795A1, proposed, at anvil iron or parallels or at cutter side and the driving side of guiding mechanism, corresponding one-way sealing is set, anvil iron or parallels are subject to because of the airtight Braking that produces when the opposite direction motion of impact direction, but when impact direction moves, there is not braking action, with this, avoid the situation (i.e. empty hammer phenomenon) of jump bit hammering anvil iron or parallels under off working state.Above scheme can prevent anvil iron or the bounce-back of parallels under non-operating mode, prevents for the second time empty hammer, but can not avoid the generation of empty hammer for the first time, and its processing and manufacturing cost relatively high.In addition, when operator wishes to transfer mode of operation to fast from non-operating mode, because the effect of brake force can make such conversion speed, reduce, affect operating efficiency.

In patent documentation US8011443B2, propose, between jump bit and anvil iron or parallels, a spring element is set, this structure can be realized large power is delivered to anvil iron or parallels from jump bit, and support that jump bit strikes on anvil iron or parallels, thereby improved the startability of jump bit cold conditions.But, this scheme will be adjusted the impulsive force of jump bit and the relation of attack time, extended the power action time of jump bit, and the peak value impulsive force of jump bit can reduce, because hand held power machine is to rely on instantaneous impact to carry out work, the reduction of its impulsive force peak value will have influence on the actual crushing effect to processing object.

In patent documentation EP1910039B1, disclose the guider of a kind of anvil iron or parallels, it attempts reasonably manufacturing under economic prerequisite, by improving with the material of multiple different hardness the life-span of this percussion mechanism in main body.Yet, for jump bit at moment impact anvil iron or parallels and cutter, because the bounce numerical value of cutter is very large, duration is very short, even if as described in it the driving side of main body is partly absorbed as rubber with elastomer, its energy still can major part be delivered to toolroom machine outside, causes operator to feel in use the vibration of reaction force, lower comfort and security etc.In addition, in patent documentation DE102010030026A1, also there is Similar Problems.

In addition, need operator all the time this toolroom machine to be applied to an extra power when operation tool machine and overcome the wherein reset force of back-moving spring in the technical scheme of patent documentation EP1578563B1, the use of this reset force is to prevent empty hammer.And, on setting, the reset force of back-moving spring there is such contradiction: if reset force is large, and better reduction, but operator need to overcome large reset force all the time, causes to use to experience variation; If reset force is little, reset effect is little, and operator does not need to overcome excessive reset force, obtains and resets timely to prevent also variation of the empty object of hammering into shape.

The elastomer (as rubber etc.) that is provided with back-moving spring simultaneously and absorbs reaction force in patent documentation WO2013004459A1, however it does not simply syntheticly have good effect yet, even poorer.For example, in its scheme, reaction force is not absorbed by flexible member completely and is partly delivered to machine exterior, in order to allow operator overcome the reset force of spring, operator also will firmly remove press tool machine, with regard to the oscilloreception that makes to be produced by impact reactive force, is reinforced simultaneously.

In some other patent documentation EP2415564B1, US7828072B2, US7168504B2, JP61095807A, DE2641070C2, EP0429475B1, US6116352A etc., also all exist poor such as impact-absorbing reaction force, comfort is not good, structure and manufacture complexity is higher, impact processing effect undesirable, cannot avoid that empty hammer hammering for the first time, service life are short, many drawbacks such as large take up room.

Utility model content

In view of this, the utility model provides for impacting percussion mechanism and the toolroom machine of operation, thereby efficiently solves the above-mentioned problems in the prior art and otherwise problem.

According to Yi Ge of the present utility model aspect, first provide a kind of for impacting the percussion mechanism of operation, it comprises power drive output, impact part, impact transference part is divided and targeting part, described power drive output provides power and has reciprocating motion portion, described reciprocating motion portion's output reciprocating motion is so that described impact part moves back and forth along impacting operating direction, and divide and apply the first active force so that it implements to impact operation to processing object to described impact transference part, described targeting part at least divides and leads described reciprocating motion portion and described impact transference part, described percussion mechanism also comprises the bias voltage part being associated with described reciprocating motion portion, it is configured such that described reciprocating motion portion directly or is divided and apply the second active force to described impact transference part by targeting part, described the second active force is identical with described the first force direction.

According to of the present utility model for impacting the above-mentioned embodiment of the percussion mechanism of operation, when alternatively, the maximum of described the second active force and minimum of a value correspond respectively to described reciprocating motion portion and move back and forth and the described impact transference part spacing of dividing minimum and maximum.

According to of the present utility model for impacting the above-mentioned embodiment of the percussion mechanism of operation, alternatively, in the numerical value interval that the maximum by described the second active force and minimum of a value form, described the second active force is cyclically-varying.

According to of the present utility model for impacting the above-mentioned embodiment of the percussion mechanism of operation, alternatively, in the numerical value interval that the maximum by described the second active force and minimum of a value form, described the second active force have correspond respectively to described the first active force be applied in before and be applied in after the first numerical value and second value, described the first numerical value is greater than described second value.

According to of the present utility model for impacting the above-mentioned embodiment of the percussion mechanism of operation, alternatively, described bias voltage partly comprises respectively the first magnet being connected with described reciprocating motion portion and divides with described impact transference part or the second magnet that targeting part is connected, and the same pole of described the first magnet and described the second magnet is arranged opposite to each other to form described the second active force.

According to of the present utility model for impacting the above-mentioned embodiment of the percussion mechanism of operation, alternatively, described reciprocating motion portion comprises ring piston, described impact portion is divided and is comprised jump bit, described jump bit is sheathed in described ring piston and is provided with betwixt the air spring that can form or disconnect according to duty or off working state, and described the first magnet is located on described ring piston; Described impact transference part is divided and is comprised cutter and the anvil iron or the parallels that are connected with described cutter, and described the second magnet is located on described anvil iron or parallels; Or

Described reciprocating motion portion comprises cylinder-piston, and described impact portion is divided and comprised jump bit, and described the first magnet is located in described cylinder-piston, described impact transference part is divided and is comprised cutter and the anvil iron or the parallels that are connected with described cutter, described targeting part comprises outer tube and inner sleeve, described inner sleeve is sheathed in described outer tube can carry out move mode along impact operating direction with respect to described outer tube, described anvil iron or parallels are can carry out move mode and be sheathed in described outer tube and can promote described inner sleeve and move along impact operating direction along impacting operating direction with respect to described outer tube, described cylinder-piston and described jump bit are sheathed in described inner sleeve can carry out move mode along impact operating direction with respect to described inner sleeve, and between described cylinder-piston and described jump bit, be provided with according to duty or off working state and the air spring that can form or disconnect, described the second magnet is located on described inner sleeve.

According to of the present utility model for impacting the above-mentioned embodiment of the percussion mechanism of operation, alternatively, described bias voltage partly comprises elastomeric element, and it is configured at least in described reciprocating motion respectively with described reciprocating motion portion and described impact transference part is divided or targeting part leans contacts to form described the second active force.

According to of the present utility model for impacting the above-mentioned embodiment of the percussion mechanism of operation, alternatively, described reciprocating motion portion comprises ring piston, described impact portion is divided and is comprised jump bit, described jump bit is sheathed in described ring piston and is provided with betwixt the air spring that can form or disconnect according to duty or off working state, described impact transference part is divided and is comprised cutter, and the anvil iron or the parallels that are connected with described cutter, one end of described elastomeric element leans and contacts with described ring piston in described reciprocating motion, its other end is connected with described anvil iron or parallels, or

Described reciprocating motion portion comprises cylinder-piston, described impact portion is divided and is comprised jump bit, described impact transference part is divided and is comprised cutter, and the anvil iron or the parallels that are connected with described cutter, described targeting part comprises outer tube and inner sleeve, described inner sleeve is sheathed in described outer tube can carry out move mode along impact operating direction with respect to described outer tube, described anvil iron or parallels are can carry out move mode and be sheathed in described outer tube and can promote described inner sleeve and move along impact operating direction along impacting operating direction with respect to described outer tube, described cylinder-piston and described jump bit are sheathed in described inner sleeve can carry out move mode along impact operating direction with respect to described inner sleeve, and between described cylinder-piston and described jump bit, be provided with according to duty or off working state and the air spring that can form or disconnect, one end of described elastomeric element leans and contacts with described cylinder-piston in described reciprocating motion, its other end is connected with described inner sleeve.

According to of the present utility model for impacting the above-mentioned embodiment of the percussion mechanism of operation, alternatively, described impact transference part divides that to be also configured to impact operating direction be that axis is rotated.

According to another aspect of the present utility model, it also provides a kind of toolroom machine, is provided with as previously discussed for impacting the percussion mechanism of operation in described toolroom machine.

According in the above-mentioned embodiment of toolroom machine of the present utility model, alternatively, described toolroom machine is hand held power machine, and described hand held power machine is provided with for battery unit and/or the external power interface of electric energy are provided to described power drive output.

According in the above-mentioned embodiment of toolroom machine of the present utility model, alternatively, described the second active force divides with described targeting part and is greater than along impacting the equivalent stress of operating direction while leaning the operating pressure that operator applies described hand held power machine in described impact transference part, and described operating pressure is greater than and makes described toolroom machine remain on the required minimum operational pressure of duty, so that described impact transference part is divided when in running order, along impacting on the Yi Ge position of operating direction, do not impacting in operating direction and be in contact with one another with described targeting part.

First, adopt percussion mechanism of the present utility model that high reset force can be provided and passed to the cutter one mobile parts such as anvil iron or parallels in guide frame that coexists, thereby reach the object that was returned to inoperative (zero load) position before empty hammer generation for the first time by the reset force effect compared with large, to avoid the situation that empty hammer occurs for the first time, so just thoroughly improved the air defense hammer ability of percussion mechanism, especially the unexpected broken sky hammer trend that waits not operation person wish switch operating state to produce due to processing object in normal impact work has been carried out effectively avoiding, improved the service life of security and parts.Secondly, the equivalent stress of the biasing force providing due to bias voltage part in this percussion mechanism in macroscopic view is less, therefore without operator, use large operating pressure, they do not need it to apply very large gripping pressure when using percussion mechanism of the present utility model and toolroom machine, thereby operating pressure is effectively reduced, and this is particularly evident for the large-scale or heavy hand held power machine effect with this percussion mechanism.In addition, by adopting Optimal Structure Designing, percussion mechanism of the present utility model has the effectively structure of impact-absorbing reaction force, thereby the operator who fully absorbs reaction force and be not delivered to toolroom machine outside holds position, thereby the vibration that the body that has effectively reduced toolroom machine passes out at work, has improved comfort and security.

Accompanying drawing explanation

Below with reference to drawings and Examples, the technical solution of the utility model is described in further detail, but it should be known that these accompanying drawings are only for task of explanation designs, therefore not as the restriction of the utility model scope.In addition, unless otherwise indicated, these accompanying drawings are only intended to Structural Tectonics described herein is conceptually described, and unnecessaryly draw to scale.

Fig. 1 is the part side cross-sectional schematic having according to first embodiment of the toolroom machine of the utility model percussion mechanism.

Fig. 2 is the part side cross-sectional schematic having according to second of the toolroom machine of the utility model percussion mechanism embodiment.

Fig. 3 is the assembling schematic diagram of the part parts such as pressure ring, sleeve in second embodiment shown in Fig. 2.

Fig. 4 is the part side cross-sectional schematic having according to the 3rd of the toolroom machine of the utility model percussion mechanism the embodiment.

Fig. 5 is the part side schematic sectional view having according to the 4th of the toolroom machine of the utility model percussion mechanism the embodiment.

The specific embodiment

First, it should be noted that, to illustrate by way of example the utility model for impacting composition structure, feature and the advantage etc. of percussion mechanism and the toolroom machine of operation below, yet all descriptions are only used for describing, and should not be understood as the utility model is formed to any restriction.In addition, in mentioned each embodiment, described or implicit any single technical characterictic herein, or be shown or lie in any single technical characterictic in each accompanying drawing, still can between these technical characterictics (or its equivalent), proceed any combination or delete, thereby obtaining of the present utility model more other embodiment that may directly not mention in this article.In addition, for the purpose of simplifying drawing, identical or similar technical characterictic may only indicate at a place in same accompanying drawing.

Unless beyond specializing, the term " battery " occurring is in this article all chargeable or non-rechargeabel battery cells of general reference, battery pack etc., and term " part " refers to form Yi Ge position or the key element of single parts or structure or refer to and forms describe whole one or more structures, parts, device or equipment etc.Upper and lower, forward and backward, inside and outside, the level mentioned in this article, the orientation term such as vertical are to describe with respect to the percussion mechanism of showing in each accompanying drawing, toolroom machine or its part, they are relative concepts, therefore likely can produce corresponding variation according to its diverse location of living in, different use state.So, these or other orientation term should be interpreted as to restricted term yet.

In general, the utility model improves design by being optimized innovatively, it provides the percussion mechanism that may be used on impacting on toolroom machine operation, thereby can bring such as effectively avoiding empty hammer, impact-absorbing reaction force, comprehensively reduces vibration, elongated component service life, numerous technique effects such as raising operator operation comfort.Summarize, such percussion mechanism consists essentially of power drive output, impacts part, impact transference part is divided, targeting part and these parts of bias voltage part, just please refer to four specific embodiment that provide below in Fig. 1 to Fig. 5 the utility model is carried out to illustrated in greater detail.

First, please refer to Fig. 1, only illustrate in a schematic way in the figure the part side sectional structure that percussion mechanism of the present utility model is applied to first embodiment on toolroom machine.The electric hammer 100 of this embodiment is the concrete application of the utility model on a kind of hand held power machine, and it can have relatively light-duty feature.As shown in Figure 1, percussion mechanism is disposed in the inside of this electric hammer 100, below just its each part and structure thereof is introduced.

In the present embodiment, power drive output in this percussion mechanism specifically comprises motor and ring piston, the former is used for providing driving power for whole electric hammer 100, and by the outside output reciprocating motion of the latter, when electric hammer 100 in running order lower time, ring piston moves back and forth as the reciprocating motion portion in power drive output.Specifically, the gear 1a being located on motor shaft coordinates transmission with the reduction gearing 3a being sleeved on power transmission shaft 2a, the rotational energy of motor is delivered to power transmission shaft 2a and makes its rotation.Guide pipe 4a and power transmission shaft 2a are arranged in parallel, and insert for cutter 5a in the front end perforate of guide pipe 4a, in the inside of guide pipe 4a, from cutter 5a mono-side, successively arrange anvil iron 6a, ring piston 7a.Jump bit 8a is partly arranged in ring piston 7a as the impact in this percussion mechanism, and at ring piston 7a rear, be provided with along the rotatable rotating dog 21a of guide pipe 4a vertical direction, fork 14a one end is through this rotating dog 21a, to be ring-type have with guide pipe and have the rotary body 13a of the raceway of certain angle to be connected with one the other end, rotary body 13a and power transmission shaft 2a connect rotation, on rotary body 13a and the formed raceway of fork 14a, there are a plurality of ball 15a, so just rotatablely moving of the motor in above-mentioned power drive output can be converted into fork 14a along the swing of guide pipe 4a, then by fork 14a, by rotating dog 21a, drive ring piston 7a to move back and forth.

As shown in Figure 1, also include ring dish 18a in guide pipe 4a, it is fixed in guide pipe 4a by snap ring 22a.Adopt this structure, can make anvil iron 6a move in one section of axial (impacting operating direction) interval range of guide pipe 4a, such structure has been set the moving range of impacting transmitting portions under electric hammer 100 zero loads (inoperative) and duty.When operator presses electric hammer 100 firmly acts on processing object by cutter 5a, cutter 5a divides as impact transference part together with anvil iron 6a, near they move to ring dish 18a along the axis direction of guide pipe 4a, at this moment the impact end 81a of jump bit 8a also can by anvil iron 6a against and towards power drive output direction, move, the annular seal ring 82a of jump bit 8a can cross the passage 71a on ring piston 7a, thereby make to form airtight air spring 20a (it forms or disconnect according to duty or off working state) between jump bit 8a and ring piston 7a, ring piston 7a just can drive jump bit 8a to implement hammering work to anvil iron 6a and cutter 5a, by this impact transference part, assign to processing object to apply impact forces (i.e. the first active force), when cutter 5a is not during against processing object, anvil iron 6a can be in guide pipe 4a together with cutter 5a front end, ring dish 18a is embedded in O type circle 19a to withhold the impact end 81a of jump bit 8a, thereby make jump bit 8a rest in the front end of ring piston 7a, at this moment the annular seal ring 82a on this jump bit is positioned at close cutter 5a mono-side of passage 71a, keep air spring 20a in off-state, make electric hammer 100 be stabilized in inoperative (unloaded without hammering) state.After this, when operator is pressed on processing object by this electric hammer, the movement of anvil iron 6a will be pushed up and be pressed impact end 81a disengaging O type circle 19a to move right, and has formed air spring 20a simultaneously and has made it enter duty.

In Zhen Tie6a both sides, be provided with

elastic washer

61a, 62a, with this, reduce with guide pipe 4a and contact with the rigidity of ring dish 18a, and guide pipe outer setting there are two bearing 10a, 11a to be connected with electric hammer matrix.Simultaneously, in guide pipe arranged outside, there is axial external toothing 9a, it matches with the output shaft 12a that cogs, for realizing guide pipe 4a together with the rotatablely moving of cutter 5, the function of (be impact transference part divide to impact operating direction be that axis is rotated) to electric hammer 100 is possessed can hammer into shape, can bore.

At anvil iron 6a, near a side of jump bit 8a, toroidal magnet 16a is also installed, mouth of pipe outer rim at ring piston 7a has toroidal magnet 17a, these toroidal magnets 16a, 17a is coaxial and same pole positioned opposite in guide pipe 4a direction, they have formed the bias voltage part in present embodiment together, to provide biasing force by the repulsive force producing between above-mentioned magnet, this biasing force with the impact forces being applied on processing object is had to equidirectional impacting operation, following used term " repulsive force " and " biasing force " and its elsewhere occurs in the text " the second active force " all have identical meanings.For ring dish 18a, can adopt the material that does not affect the magnetic of above-mentioned magnet such as stainless steel etc. to form.When electric hammer 100 work, operator impacts operating direction to this electric hammer applied thrust (being operating pressure) along cutter, repulsive force between toroidal magnet 16a, 17a is contrary with thrust direction, at ring piston 7a, move to reciprocating motion foremost when (being tool orientation), above-mentioned repulsive force is maximum; When moving back and forth rearmost end (being power drive output direction), above-mentioned repulsive force is minimum.Under reciprocal repeated action, if make the equivalent stress of above-mentioned repulsive force and thrust that operator applies electric hammer 100 keep balance, so just entered steady-working state.In the utility model, can be by for example by regulating the attribute of magnet to change feature and the size of repulsive force, by its equivalent stress person's that comes balancing run thrust.Like this, when in steady operation, just can realize anvil iron 6a itself and elastic washer 62a and directly not contact with ring dish 18a, but make to maintain a certain distance between them, (concrete size is determined by operator's thrust, as little in thrust apart from large; Otherwise greatly distance is little as thrust.Can meet under most operators' thrust by setting, realize between anvil iron 6a and ring dish 18a and maintaining a certain distance).

Please continue to refer to Fig. 1, under the impact of jump bit 8a, the cutter 5a reaction force of returning that rebounds will be passed to the magnetic spring between toroidal magnet 16a, 17a and is absorbed by anvil iron 6a, thereby played the effect that reduces electric hammer vibration, because this magnetic spring is contactless and owing to having larger compression travel, therefore can use smaller stiffness coefficient, thereby obtain good effectiveness in vibration suppression.As previously discussed, owing to adopting in the present embodiment the non-contacting scheme of magnet, therefore provide and guaranteed to implement the technical solution of the utility model under life-span prerequisite.In addition, above-mentioned repulsive force between toroidal magnet 16a, 17a can be periodically alternately to change, its in process that jump bit 8a impacts in very large scope, therefore when repulsive force is greater than operator's thrust, if now occur that processing object is destroyed, under larger repulsive force effect, anvil iron 6a and cutter 5a can turn back to very large acceleration the front end of guide pipe 4a so, so just can effectively avoid the generation of empty hammer (when jump bit impacts next time) for the first time.The magnetic force property having due to magnet, therefore its equivalent action power can be carried out to wide optimization regulates, make to have electric hammer 100 and have better user adaptation, the repulsive force producing closely time due to magnet relatively very large simultaneously, therefore can obtain very effective air defense hammer effect.So, can fundamentally reduce electric hammer and occurring the number of times of empty hammer, the service life of effectively improving toolroom machine in life cycle.

Next, please again in conjunction with referring to figs. 2 and 3 being specifically described having according to the second embodiment of the toolroom machine of the utility model percussion mechanism, wherein will be sketched with content identical or similar in last embodiment, description thereof is omitted or on drawing, do not indicate.

As shown in Figures 2 and 3, the electric hammer 200 of the second embodiment is the concrete enforcement of the utility model on a kind of relatively light-duty electric hammer, wherein adopted flexible member to transmit biasing force between the power drive output of percussion mechanism and impact transference part are divided, such flexible member can adopt such as all kinds of spring members such as spiral Compress Springs, this base part belongs to the standard parts and components that is simple and easy to purchase thus, therefore solution especially is cheaply provided, it can be so that the utility model possesses very significantly cost advantage when guaranteeing the utility model effect.Compare with above-mentioned the first embodiment, the difference part of present embodiment is following these aspects.

As shown in Figure 2, in the inner cutter end of guide pipe 4a, there is the sleeve 23b matching with this guide pipe 4a, the pin 33b that runs through guide pipe 4a is installed in sleeve 23b end, the periphery of guide pipe 4a fixedly snap ring 34b carry out the disengaging of anti-shotpin 33b, it is inner and can move vertically that anvil iron 24b is arranged on sleeve 23b, and at sleeve 23b, be provided with can be along the axially movable pressure ring 25b of guide pipe 4a outside and guide pipe 4a inside.

Again as shown in Figure 3, on sleeve 23b, have strip groove 231b.The 26b that has strong market potential runs through pressure ring 25b, sleeve 23b and anvil iron 24b and pressure ring 25b and anvil iron 24b is coupled together, and can with respect to sleeve 23b and guide pipe 4a, move axially simultaneously.In addition, perforate place locking ball 28b on guide pipe 4a, prevents that at the disposed outside collar 29b of guide pipe 4a locking ball 28b from deviating from.In addition, offer strip blind slot 251b on the pressure ring 25b shown in Fig. 3, it matches for limiting anvil iron 24b moving range in guide pipe 4a inside together with pressure ring 25b with locking ball 28b.

In Fig. 2, at pressure ring 25b, near a side of ring piston, be furnished with thrust bearing 30b and drag ring 31b, a side and the thrust bearing 30b of drag ring 31b are in contact with one another, and its opposite side connects Compress Spring 32b one end, and the other end and ring piston 7a end join.The object that thrust bearing 30b is set is, when electric hammer 200 in hammer not only but also bore duty time, at above-mentioned pressure ring 25b, will rotate and ring piston 7a can not rotate together in the situation that, can make thus Compress Spring 32b not bear circumferential twisting resistance.

As mentioned above, to form the bias voltage part in percussion mechanism by the flexible member of lower cost is set in the present embodiment, this flexible member provides mechanicals efforts to be used as biasing force, similar by the formed magnetic repulsive force of pair of magnets in its action effect and the first embodiment, therefore repeat no more as space is limited.

Continue below with reference to figure 4, the 3rd embodiment of the utility model toolroom machine to be specifically described, in this Fig. 4, schematically demonstrated the part side sectional structure of the 3rd embodiment.

As shown in Figure 4, in the inside of the electric hammer 300 of present embodiment, be provided with the percussion mechanism providing according to the utility model, this electric hammer is the concrete enforcement of the utility model on a kind of heavy electric hammer.Below just for the essential structure of this electric hammer and percussion mechanism wherein, operation principle etc., describe.

In the 3rd embodiment, in electric hammer 300, the power drive output of percussion mechanism specifically comprises motor and cylinder-piston, the former is used for providing driving power for whole electric hammer 300, and by the outside output reciprocating motion of the latter, when electric hammer 300 in running order lower time, cylinder-piston moves back and forth as the reciprocating motion portion in power drive output.

Specifically, as shown in Figure 4, on the matrix of electric hammer 300, be fixedly connected with steady pin 2c bottom, the first gear 3c is socketed in steady pin 2c above and can be rotated round this steady pin 2c by the blind hole 31c on it, and the gear 1c that this first gear 3c is located on motor shaft drives.In addition, on the first gear 3c, be also connected with a column protuberance 4c who departs from its pivot, by the driving of gear 1c, realize the circular motion of column protuberance 4c.Be provided with in the present embodiment the integrated gear with two gears and be used for realizing double reduction, the big circumference tooth portion by gear 1c and gear 5c realizes primary speed-down, and coordinate to realize double reduction by the little tooth of circle portion outstanding in the middle of gear 5c with the gear 16c overlapping on guide pipe 6c outside, the object of adopt slowing down is the function in order to make this electric hammer 300 have not only hammer but also bore, and makes its rotating speed can be very not large due to double reduction.In addition, said gear 5c has axle 51c, and it is set in electric hammer 300 casing Shang holes (not shown) and can adds bearing to reduce wear.

Outer guide pipe 6c is arranged vertically with motor shaft in the axial direction, Qi one end is provided with cutter sleeve pipe 7c, pin 10c passes outer guide pipe 6c and is embedded in cutting tool sleeve 7c, outside guide pipe 6c circumferential arrangement baffle ring 11c be used for anti-shotpin 10c and deviate from, with this, realize the connection of outer guide pipe 6c and cutter sleeve pipe 7c.The inside of guide pipe 6c outside, cutter sleeve pipe 7c side is provided with and can coordinates along the inside of outer guide pipe 6c and can axially movable inner sleeve 8c, knife end at inner sleeve 8c is furnished with snap ring 85c, chamfered washer 84c, O type circle 83c, flat shim 82c and inner ring snap ring 81c successively, Zhen Tie9c one end is from they middle passing, and the conical surface 93c of the chamfering anchor ring of chamfered washer 84c and anvil iron 9c is in contact with one another, the other end of anvil iron 9c inserts in cutter sleeve pipe 7c and leans with the end face of cutter 23c.As shown in Figure 4, at anvil iron 9c, near one end of jump bit, be provided with cylinder segment 92c, to guarantee parallels 9c can remain on center, its right-hand member does not depart from the hole of targeting part inner sleeve, therefore can realize by above-mentioned cylinder segment 92c all the time in operating position or off-position is directed to part and leads and radial support.

As also demonstrated an extension of section 63c on outer guide pipe 6c right side in Fig. 4, because being set in inner sleeve 8cNei Bing right side, cylinder-piston 20c stretches out inner sleeve 8c, its extension also contacts and is directed to the extension of section 63c of the outer guide pipe 6c rightmost side, therefore can provide better support for cylinder-piston 20c by extension of section 63c, this especially shows and reciprocates to the rightmost side and cause its length being socketed by inner sleeve 8c in the most in short-term as cylinder-piston 20c.

Knife end at inner sleeve 8c, outer guide pipe 6c has the oblong slots 61c axially offering, the disposed outside of outer guide pipe has sleeve 12c, 13c, on sleeve 12c, offer circular hole, pin 14c passes this circular hole, oblong slots 61c and is inserted in the blind hole of inner sleeve 8c, is furnished with snap ring 15c outward comes anti-shotpin 14c to get loose at sleeve 12c.Adopt above frame mode, can realize when cutter 23c moves and promote anvil iron 9c, anvil iron 9c will promote inner sleeve 8c and move together with sleeve 12c and 13c.In addition, be also provided with bearing 17c, 18c as the support of outer guide pipe 6c, to support it to be rotated.

In inner sleeve 8c, be provided with jump bit 19c, and be provided with cylinder-piston 20c at the other end of inner sleeve 8c.As shown in Figure 4, can

O type circle

191c, 201c and 91c be set respectively along jump bit 19c, cylinder-piston 20c and anvil iron 9c exterior circumferential separately.Cylinder-piston 20c is connected by connecting rod 22c with the eccentric column protuberance 4c of the first gear 3c, makes this cylinder-piston 20c to be driven to move back and forth by eccentric column protuberance 4c.On inner sleeve 8c, between cylinder-piston 20c and jump bit 19c, there is perforate 86c, on guide pipe, have outside through hole 62c, anvil iron 9c is when being compressed to oblong slots 61c mono-side by cutter 23c, now perforate 86c and through hole 62c misalign, and sleeve 13c has sealed through hole 62c and outside circulation of air, therefore between cylinder-piston 20c and jump bit 19c, formed air spring 21c, enter duty and impacted operation.

When cutter 23c leaves processing object, cutter 23c, anvil iron 9c and inner sleeve 8c move to pin 14c in oblong slots 61c knife end (impacting operating direction), now through hole 62c and perforate 86c centering, and sleeve 13c can not shelter from through hole 62c, thereby air spring 21c is disconnected, entered inoperative (zero load) state.

At above-mentioned inner sleeve 8c, near a side of power drive output, arranged toroidal magnet 24c, correspondence one side at cylinder-piston 20c has been arranged toroidal magnet 25c, in normal operation, between above-mentioned

toroidal magnet

24c, 25c, do not contact each other, their coaxially arranged and same pole positioned opposite, they have formed the bias voltage part in present embodiment together, to provide biasing force by the repulsive force producing between above-mentioned magnet, the direction of this biasing force is with identical to the percussion force direction being applied on processing object in impact operation.When electric hammer 300 work, operator applies the thrust of impacting operating direction along cutter to this electric hammer, repulsive force between

toroidal magnet

24c, 25c is contrary with thrust, at cylinder-piston 20c, moves to reciprocating motion foremost when (being tool orientation), and above-mentioned repulsive force is maximum; When moving back and forth rearmost end (being power drive output direction), above-mentioned repulsive force is minimum.Under normal reciprocal repeated action, if the thrust-balancing that the equivalent force of above-mentioned repulsive force and operator apply electric hammer 300 enters steady-working state.Identical with the situation in aforementioned the first embodiment, can be by regulating the attribute (being feature and the size of repulsive force) of

toroidal magnet

24c, 25c to realize under operator's thrust in the utility model, when entering steady-working state, the pin 14c that passes the inner sleeve 8c contacting with anvil iron 9c does not contact near the extreme position of cylinder-piston 20c mono-side with oblong slots 61c.Under the impact of jump bit 19c, the cutter 23c reaction force of returning that rebounds will pass to the magnetic spring between

toroidal magnet

24c, 25c by anvil iron 9c and inner sleeve 8c, thereby has played the effect that reduces electric hammer vibration.In addition, because this magnetic spring is contactless and has smaller stiffness coefficient, therefore can obtain good effectiveness in vibration suppression, and adopt the non-contacting scheme of magnet also to providing the service life of whole electric hammer reliably, to guarantee.In addition, due to above-mentioned toroidal magnet 24c, repulsive force between 25c can be periodically alternately to change, therefore the magnet repulsive force in jump bit 19c impact process is in very large scope, therefore when repulsive force is greater than operator's thrust, if now occur that processing object is destroyed, so under larger repulsive force effect, anvil iron 9c, the front end of guide pipe 4c is got back in the meetings such as inner sleeve 8c and cutter 23c with very large acceleration, thereby effectively avoided the generation of empty hammer for the first time, so just fundamentally reduced electric hammer the empty generation of hammering into shape has occurred in life cycle, effectively improved the service life of toolroom machine.

Then, in Fig. 5, shown percussion mechanism of the present utility model has been applied to the 4th embodiment on toolroom machine, because this embodiment has more identical or similar structure with aforementioned the 3rd embodiment, thus in these perhaps structure will be sketched or description thereof is omitted or in Fig. 4, will not indicate to simplify drawing.

As shown in Figure 5, electric hammer 400 in the 4th embodiment is the concrete enforcement of the utility model on a kind of electric hammer of heavy type, wherein adopted flexible member to transmit biasing force between the power drive output of percussion mechanism and impact transference part are divided, such flexible member can adopt such as all kinds of spring members such as spiral Compress Springs, can realize thus especially cheaply solution and make the utility model possess cost advantage.

Compare with the 3rd embodiment, the difference part of present embodiment is: at inner sleeve 8c, near a side of power drive output (comprising motor and cylinder-piston 20c), thrust bearing 26d and pad 27d are installed, and the outer rim at cylinder-piston 20c is arranged by annular groove 202d, between pad 27d and annular groove 202d, arranges Compress Spring 28d.The object that thrust bearing 26d is set is can hammer into shape can bore function time in order to possess when needs electric hammer 400, and inner sleeve 8d will rotate and cylinder-piston 20d can not rotate, the effect that can make shape piston 20d not bear circumferential twisting resistance by thrust bearing 26d.About other partial contents in present embodiment, can correspondingly consult above in to the explanation of the 3rd embodiment and Fig. 4, and in can consulting above in the second embodiment as the explanation of the contents such as flexible member, at this, all repeat no more.

Finally, what should mention especially is, below only having enumerated four embodiments describes the utility model, yet the utility model allows to carry out more deformation process flexibly completely, below only with regard to some of them situation, carry out exemplary illustration, the explanation of these examples equally can not be with any restriction of the present utility model of opposing.

For example, under optional situation, the toolroom machine that the utility model is provided for impacting operation can adopt hand-held, the percussion mechanism that the utility model can certainly be provided for impacting operation is applied on other non-hand held power machine, can give play to too aforementioned various technical advantages of the present utility model.As an example, under aforesaid application scenario, its applicating example can be bench type tool machine, or heavy-duty machinery but not operator's hand-held.

And for example, the power drive output of battery unit (such as adopting lithium-ion-power cell etc.) in percussion mechanism can be set on having applied these toolroom machines of the present utility model electric energy is provided, or also can individually or be combined in and on these toolroom machines, external power interface is set and electric energy is provided or charges for above-mentioned battery unit to power drive output.

For another example, the utility model percussion mechanism medium power driver output is partly not limited to adopt aforesaid by transforming the mode of output reciprocating motion after electric rotating machine driven wheel, also can use such as linear reciprocating motor, alternating current and drive the modes such as solenoid and magnet that driving power direct output reciprocating motion are provided.

In addition, can be according to application needs, the biasing force (repulsive force being formed by magnet as aforementioned or the mechanical force being formed by flexible member) that bias voltage part in the utility model percussion mechanism is provided is arranged to: when its maximum moves back and forth corresponding to reciprocating motion portion, divide distance between the two for hour with impact transference part, and its minimum of a value is while being maximum corresponding to the distance between said two devices.In addition, above-mentioned biasing force can also be arranged to have periodically variable feature, for example when employing provides repulsive force mode by magnet, the Parameter Variation of biasing force can change according to the formed magnetic signature of magnet, obviously these magnets that use also needn't require size dimension in full accord, when carrying out mounting arrangements, also do not require they are faced completely, and these magnets can adopt the modes such as magnet or solenoid to realize.The biasing force providing for bias voltage part, can the vicissitudinous different numerical value of tool in its number range, those numerical value before being wherein applied on processing object corresponding to impact forces can be greater than those numerical value after being applied on processing object corresponding to impact forces, with this, make to have larger biasing force before each jump bit hammer impacts transfer part, can provide higher reset force to improve and prevent empty hammer.In addition, under optional situation, owing to dividing in impact transference part with targeting part, along impacting operating direction, lean while contacting, the biasing force partly being provided by bias voltage equivalent stress value is now maximum, when it is greater than the operating pressure that operator applies hand held power machine, and operating pressure is greater than while making toolroom machine remain on the required minimum operational pressure of duty, just can so that impact transference part divide in a kind of " suspension " state, under operating pressure now can guarantee that it in working order, and such state can make impact transference part divide generation " suspension " and not with targeting part on impact direction mutually against and rest on the Yi Ge position of impacting operating direction, thereby can realize better vibration isolation and absorbing effect.

Again for example, fork in the first embodiment, connecting rod or cam pin in the 3rd embodiment, or add that at upper extra another eccentric disc arranging of the first gear (the 3rd or the 4th embodiment) extra reciprocating motion part acts on that impact transference part is divided or act on impact transference part by targeting part divides, can be as the supplier to the biasing force of bias voltage part, one of them useful adjustment is another eccentric disc to be additionally set add that extra reciprocating motion part acts on impact transference part and divides, can design as required provided biasing force is provided applicable reciprocal distance feature and size.For side's of bearing " impact transference part is divided " of biasing force, so long as can follow the receptor that holds that parts that cutter moves with respect to toolroom machine together all can be used as biasing force, because it can pass to cutter by biasing force.Can easily understand, except anvil iron, the pressure ring of mentioning in above-mentioned the second embodiment is due to and together motion affixed with anvil iron, therefore its biasing force bearing also can finally pass to cutter, so such configuration is also comprised in the scope that impact transference part divides in broad sense more.Certainly, also aforesaid the second active force (or being referred to as biasing force, repulsive force etc.) can be applied in impact transference part by targeting part, so also can realize the desired ideal effect of the utility model.Can also envision, if cutter is directly accepted the biasing force that spring provides in embodiment, or cutting tool sleeve can move axially in embodiment together with cutter, so also can be used as the part that impact transference part divides and accept biasing force, thereby can reach the utility model object equally.In addition, the parts such as cylinder-piston in above embodiment can adopt such as any suitable material such as macromolecular materials to be made, to avoid the magnetic field that aforementioned magnet is produced to impact.

Below only with way of example, illustrate in detail the utility model for impacting percussion mechanism and the toolroom machine of operation, these a few examples are only for explanation principle of the present utility model and embodiment thereof, but not to restriction of the present utility model, in the situation that not departing from spirit and scope of the present utility model, those skilled in the art can also make various distortion and improvement.Therefore, all technical schemes that are equal to all should belong to category of the present utility model and be limited by every claim of the present utility model.

Claims

1. one kind for impacting the percussion mechanism of operation, it comprises power drive output, impact part, impact transference part is divided and targeting part, described power drive output provides power and has reciprocating motion portion, described reciprocating motion portion's output reciprocating motion is so that described impact part moves back and forth along impacting operating direction, and divide and apply the first active force so that it implements to impact operation to processing object to described impact transference part, described targeting part at least divides and leads described reciprocating motion portion and described impact transference part, it is characterized in that, described percussion mechanism also comprises the bias voltage part being associated with described reciprocating motion portion, it is configured such that described reciprocating motion portion directly or is divided and apply the second active force to described impact transference part by targeting part, described the second active force is identical with described the first force direction.

2. according to claim 1 for impacting the percussion mechanism of operation, it is characterized in that, when the maximum of described the second active force and minimum of a value correspond respectively to described reciprocating motion portion and move back and forth and the described impact transference part spacing of dividing minimum and maximum.

3. according to claim 1 for impacting the percussion mechanism of operation, it is characterized in that, in the numerical value interval that the maximum by described the second active force and minimum of a value form, described the second active force is cyclically-varying.

4. according to claim 1 for impacting the percussion mechanism of operation, it is characterized in that, in the numerical value interval that the maximum by described the second active force and minimum of a value form, described the second active force have correspond respectively to described the first active force be applied in before and be applied in after the first numerical value and second value, described the first numerical value is greater than described second value.

According to described in any one in claim 1-4 for impacting the percussion mechanism of operation, it is characterized in that, described bias voltage partly comprises the first magnet being connected with described reciprocating motion portion and divides with described impact transference part or the second magnet that targeting part is connected, and the same pole of described the first magnet and described the second magnet is arranged opposite to each other to form described the second active force.

6. according to claim 5 for impacting the percussion mechanism of operation, it is characterized in that, described reciprocating motion portion comprises ring piston, described impact portion is divided and is comprised jump bit, described jump bit is sheathed in described ring piston and is provided with betwixt the air spring that can form or disconnect according to duty or off working state, and described the first magnet is located on described ring piston; Described impact transference part is divided and is comprised cutter and the anvil iron or the parallels that are connected with described cutter, and described the second magnet is located on described anvil iron or parallels; Or

According to described in any one in claim 1-4 for impacting the percussion mechanism of operation, it is characterized in that, described bias voltage partly comprises elastomeric element, and it is configured at least in described reciprocating motion respectively with described reciprocating motion portion and described impact transference part is divided or targeting part leans contacts to form described the second active force.

8. according to claim 7 for impacting the percussion mechanism of operation, it is characterized in that, described reciprocating motion portion comprises ring piston, described impact portion is divided and is comprised jump bit, described jump bit is sheathed in described ring piston and is provided with betwixt the air spring that can form or disconnect according to duty or off working state, described impact transference part is divided and is comprised cutter, and the anvil iron or the parallels that are connected with described cutter, one end of described elastomeric element leans and contacts with described ring piston in described reciprocating motion, its other end is connected with described anvil iron or parallels, or

According to described in any one in claim 1-4 for impacting the percussion mechanism of operation, it is characterized in that, described impact transference part divides that to be also configured to impact operating direction be that axis is rotated.

10. a toolroom machine, is characterized in that, is provided with as described in any one in claim 1-9 for impacting the percussion mechanism of operation in described toolroom machine.

11. toolroom machines according to claim 10, is characterized in that, described toolroom machine is hand held power machine, and described hand held power machine is provided with for battery unit and/or the external power interface of electric energy are provided to described power drive output.

12. according to toolroom machine described in claim 11, it is characterized in that, described the second active force divides with described targeting part and is greater than along impacting the equivalent stress of operating direction while leaning the operating pressure that operator applies described hand held power machine in described impact transference part, and described operating pressure is greater than and makes described toolroom machine remain on the required minimum operational pressure of duty, so that described impact transference part is divided when in running order, along impacting on the Yi Ge position of operating direction, do not impacting in operating direction and be in contact with one another with described targeting part.