CN101045259A

CN101045259A - Drilling machine tool

Info

Publication number: CN101045259A
Application number: CNA200710089015XA
Authority: CN
Inventors: 米夏埃多·凯勒; 彼得·齐格勒; 汉斯－于尔根·施耐克尔斯
Original assignee: Metabowerke GmbH and Co
Current assignee: Metabowerke GmbH and Co
Priority date: 2006-04-01
Filing date: 2007-03-29
Publication date: 2007-10-03
Also published as: DE102006015274A1; DE102006015274B4

Abstract

The present invention refers to a drilling machine tool (2), particularly the hammer drilling, which has a shell (4) and a driving main shaft (6) projected from the shell and a tool clamp (8) which can be assembled to driving shaft (6) and can be taken down. The latter has a manual operation lock and releasing institute (10), so that the tool clamp (8) can be assembled along the shaft direction to the driving shaft (6) or released. There is a linking device (19) in the drilling machine tool, which is used to realize the rotating linking between the driving shaft (6) and the tool clamp (8). The drilling machine tool has an overload clutch (32), which is used to limit the shock-appearing reversal torque. The present invention puts forward that the overload clutch (32) is set in the tool clamp (8) out of the shell body (4) and makes the rotation linking removed when the rotating torque which is set by the manufacturing company and can not be changed is exceeded.

Description

Drilling machine tool

Technical field

The present invention relates to a kind of drilling machine tool, especially hammer drill, it has a housing and a drive shaft of being stretched out by this housing, and cutter chuck that can be assemblied on this drive shaft and can take off from it, this cutter chuck has the locking that can manually control-and relieving mechanism, so that cutter chuck is assembled on the drive shaft or escapes along axial shape sealedly, this drilling machine tool also has a coupling arrangement, be used to realize that drive shaft connects with rotation between the cutter chuck, this drilling machine tool also has a safety clutch, is used to limit the torque reaction that impact type occurs.The percussion drill of the above-mentioned type is disclosed by the applicant and other suggestion people repeatedly.Such as, the applicant provides be suitable for holing hammer drill UHE, the KHE of operation and impact type boring operation, they also are known as the multipurpose hammer or (seeing up-to-date Metabo Hauptkatalog 2005/2006) hammered in combination into shape.In these hammer drills, in order to limit the torque reaction that impact type occurs, in the transmission mechanism of drilling machine tool, just in the enclosure interior of drilling machine tool, driving path between motor and drive shaft, be provided with a safety clutch.This torque reaction is stuck under the situation in the bar-mat reinforcement when drilling tool or hammer drill cutter are carrying out broken work and occurs.

Background technology

Under the typical situation, this drilling machine tool uses different cutters to carry out work.Under the situation of using hammer bit (generally having SDS-plug-in type end), the torque that is under normal circumstances occurred when using hammer drill is relatively little, and operating personnel apply very little countertorque to these need when work.If hammer bit for example is stuck among the bar-mat reinforcement, the torque reaction that then acts on the operating personnel suddenly raises.So the triggering torque of safety clutch should be relatively low for this applicable cases.But, a lower triggering torque makes with other cutters, such as the work change difficulty that edge bores circular drill bit (Bohrkronen) or spiral bit, and is perhaps simply infeasible.In other words, when using edge circular drill bit of brill or spiral bit to carry out work, needed torque is higher than the situation of using hammer bit work significantly.Under this working condition, operating personnel also intuitively prepare the higher anti-torque of reply.Therefore, under such applicable cases, can use the safety clutch with higher triggering torque, this not only has Practical significance, and can influence operating personnel's safety sharply.

The applicant has set forth following suggestion by undocumented European patent application EP 05010813.3 still: will be used to realize that the coupling arrangement that drive shaft connects with rotation between the cutter chuck is configured to safety clutch simultaneously, and can be triggered the adjusting of torque by a torque adjustment apparatus by operating personnel.But, having exposed like this is not inappreciable danger,, may give the triggering torque that makes mistake that is, and this is proved to be problematic.

Summary of the invention

Target of the present invention is: proceed to improve for drilling machine tool, especially hammer drill or impact drill, make it consider specific security requirement better according to the situation of employed cutter and cutter chuck.

According to the present invention, in the drilling machine tool of the above-mentioned type, the method that reaches this target is: with safety clutch in the outer setting of housing among cutter chuck, and when and torque that user can't make it change given in advance by the producer are exceeded, rotation connects and is disengaged.According to the present invention, safety clutch is by stretching out in the housing (as known drilling machine tool before this), and transfers among the cutter chuck.There is such possibility thus, promptly, under the situation of the different cutter chucks that is respectively applied for special insertion tool, this safety clutch is correspondingly constructed special requirement by manufacturer, makes the user can not provide inappropriate triggering torque more in advance when using the cutter chuck of determining.Thus, improve the reliable rows of operation on the one hand, can create best condition of work at employed different insertion tools on the other hand.In hammer drill, usually provide a kind of so-called hammer chuck for hammer bit or other the cutter class cutter that has SDS-plug-in type end usually by manufacturer.These be specially adapted to have corresponding cutters hammer drill cutter chuck and wherein integrated safety clutch designed like this, make safety clutch at a relatively low triggering torque value---such as 10Nm---when being exceeded, will disconnect with drive shaft between rotation connect.But, be in the safety clutch under this disengaged condition, when promptly safety clutch " skids ", still can transmit an excess torque.

In order to use other insertion tools, for example hammer bit or edge bore circular drill bit, according to the present invention, provide other cutter chuck, they have and are the special predefined triggering torque of these purposes, and this triggering torque can not be by user's change.Other interchangeable chuck, for example be used for other cutters, for example have for example be determined the quick clamp drill clamping head or the gear ring drill chuck that are used at the round shank that does not have to impact or work during the hammering function can be with other triggering torque structure.

Generally, provided the structure of the reliable more and drilling machine tool that is suitable for working in the best condition of a kind of work.

Also can consider to be similar to still undocumented EP 05010813.3 ground in principle and construct described safety clutch, its mode is: when the triggering torque was exceeded, a pressing body direct and the drive shaft mating reaction can move among the off-position.The mode that it is also conceivable that another kind of dominance is: all parts of safety clutch all are configured to the member of cutter chuck, and can take off from drive shaft with this cutter chuck.Under these circumstances, can all use same rotation clutch and drive shaft to carry out clutch all the time for different cutter chucks, and the enforcement of overload clutch and settle can be at the slave end of rotation clutch, between drive shaft and cutter chuck.Proved already: simple especially, therefore favourable rotation clutch is: drive shaft have non-circular, especially polygon-shaped circumferential groove and with cutter chuck on the inner periphery section of shape complementarity constitute shape sealed take rotary device.

Consider the structure of the load that the abrasion of safety clutch is few and as far as possible little, a slip-clutch that radially works is proved to be favourable.Though also can consider the safety clutch that axially works in principle; But when using drilling machine tool, this safety clutch but must additionally bear the load of axially going up effect in this case.A favourable embodiment of the present invention is designed like this, make one of cutter chuck to surround drive shaft and be in slip-clutch that radially outward acts on of a secondary part formation of drive part that rotation connects and cutter chuck with drive shaft, this secondary part is surrounded drive part diametrically in the outside.

In addition; also the rights protection requirement is proposed for a kind of drilling machine tool; it has a set (Sachgesamheit) of being made up of a plurality of different cutter chucks; wherein; described multiple different cutter chuck has a safety clutch that is arranged in the cutter chuck respectively; and in these cutter chucks, by manufacturer given in advance and the user can't change torque be different, safety clutch makes rotation connect when reaching described torque and removes.

Description of drawings

Other features of the present invention, details and advantage provide in other application documents, and provide in the explanation about the diagram of a preferred embodiment of drilling machine tool of the present invention and back.Shown in the figure be:

The show in schematic partial sections of Fig. 1 drilling machine tool of the present invention, it has a hammer drill cutter chuck;

The dissect cutaway view on plane of Fig. 2 II-II in Fig. 1, and

The schematic side elevation of Fig. 3 drilling machine tool of the present invention, it has a gear ring cutter chuck.

The specific embodiment

Provided the drilling machine tool of using a hammer drill form of reference number 2 signs generally in the accompanying drawing, it has a housing 4 and one by the drive shaft 6 of stretching out in the housing 4 and a cutter chuck 8, and the latter can be assembled to drive shaft 6 and get on and can take off from this drive shaft.For this reason, being provided with one can be manually and the locking and the relieving mechanism 10 of operation by the seat of one's pants, here it comprises two pressing bodies 12 that are configured to ball in the example of being given, they are inserted into the circumferential groove 14 of drive shaft 6 from a side opposite on the end opposite of diameter, so that cutter chuck 8 shapes are fixed on the drive shaft 6 sealedly.For cutter chuck 8 is disassembled from drive shaft 6 vertically, be provided with one towards the adjustable ring 16 of locking direction by springs preload, when the rotation of the described springs preload of opposing ground, this adjustable ring upwards is in the spatial accommodation in the outside for pressing body 12 provides a footpath, when with cutter chuck 8 axially when drive shaft 6 is pulled out, pressing body 12 can be squeezed in this spatial accommodation, thus, the sealed connection of shape of axially going up between the circumferential groove 14 of pressing body 12 and drive shaft 6 is disengaged.

Drive shaft 6 has a polygonal circumferential sectors 18 in addition, and the inner periphery section 20 of a complementation of it and cutter chuck 8 is in the sealed commentaries on classics state of taking of shape.Thus, between drive shaft 6 and cutter chuck 8, constitute a coupling arrangement 19 (rotating mechanism).Non-circular but cutter chuck driver part 22 ring seal constitutes though inner periphery section 18 is by of cutter chuck 8.This driver part 22 has some the radially protrusion 24 that replaces in a circumferential direction and retraction portions 26.Utilize these protrusions that radially outward extends 24, driver part 22 is by touching on the annular secondary part 28 of cutter chuck 8 substantially concentricly, and constitutes a slip-clutch 30 with it, and this slip-clutch is still safety clutch 32 simultaneously.When the triggering torque of the surface of the inner periphery that depends on these protrusions 24 and secondary part 28 structure and geometry was exceeded, safety clutch 32 was opened, and its mode is that driver part 22 slides with respect to secondary part 28.Can prevent reliably in this way the opposing torque that applies to operating personnel surpass allow, by the predefined numerical value of manufacturer.At this, the user can not have a mind to or by mistake change the triggering by the predefined safety clutch 32 of manufacturer.

Mention clearly: the structure of above-described safety clutch 32 also can be other modes, the especially driving by axial action-and drive element.In addition, can use axial or radially movable pressing body, they are under the prestrain, wherein, when being exceeded by the predefined triggering torque of manufacturer, these pressing bodies just arrive a position that makes drive shaft connect releasing with the rotation between the cutter chuck.

Among Fig. 1 with for example and the mode of hint property provided the cutter chuck 8 of a hammer chuck form, be used to have the cutter of the plug-in type end of SDS or SDS+, these plug-in type ends just in time be for the hammer drill operating mode determined.In contrast to this, Fig. 3 has schematically provided the cutter chuck of another gear ring one pawl formula drill chuck form, and it is determined with special size and is used for and is suitable for use in the cutter with round shank.Cutter chuck shown in Figure 3 has a safety clutch of realizing in cutter chuck 8 aspect the manufacturer, such as with the type shown in aspect Fig. 1, but compare with the safety clutch 32 of cutter chuck 8 shown in Figure 1, and its overload torque is different.

Claims

1. drilling machine tool (2), especially hammer drill, have a housing (4) and a drive shaft of stretching out (6) and one and can be assembled to the cutter chuck (8) that drive shaft (6) goes up and can take off by this housing, the latter have one can manually operated locking-and relieving mechanism (10), so that cutter chuck (8) is assembled to drive shaft (6) along axial shape to be gone up or makes it to discharge sealedly, this drilling machine tool also has a coupling arrangement (19), be used to realize that drive shaft (6) connects with rotation between the cutter chuck (8), this drilling machine tool also has a safety clutch (32), be used to limit the torque reaction that impact type occurs, it is characterized by: this safety clutch (32) is arranged on outside housing (4) in the cutter chuck (8) and when being exceeded by the given in advance but unalterable turning moment of user of manufacturer, rotation being connected remove.

2. drilling machine tool as claimed in claim 1 is characterized by: all parts of this safety clutch (32) are configured to the part of cutter chuck (8), and can take off from drive shaft (6) with this cutter chuck.

3. drilling machine tool as claimed in claim 1 or 2, it is characterized by: this coupling arrangement (19) constitutes in the following manner, promptly, drive shaft (6) has non-circular, a polygonal circumferential sectors (18) particularly, the inner periphery section (20) of a complementation of this circumferential sectors and cutter chuck (8) constitute shape sealed take rotary device.

4. as claim 1,2 or 3 described drilling machine tools, it is characterized by: one of cutter chuck (8) is in a secondary part (28) the formation slip-clutch to the radially outer effect (30) of drive part (24) that rotation connects and cutter chuck (8) around drive shaft (6) and with this drive shaft (6), be used as safety clutch (32), this secondary part at radially outer around drive part (24).

5. as one of above-mentioned claim described drilling machine tool (2), has a set of forming by a plurality of different cutter chucks (8), wherein, described a plurality of different cutter chuck (8) has a safety clutch (32) that is arranged in this cutter chuck respectively, and in these cutter chucks, by manufacturer given in advance and torque that the user of service can't make it to change is different, under the situation of described torque, this safety clutch (32) connects described rotation and removes.

6. a cutter chuck (8), be used for drilling machine tool as claimed in claim 1 (2), have one can manually operated locking-and relieving mechanism (10), be used for that cutter chuck (8) is axially gone up shape and be assembled to drive shaft (6) sealedly and go up or make it release; Have a coupling arrangement (19) and realize that drive shaft (6) connects with rotation between the cutter chuck (8); Also have a safety clutch (32) and limit the torque reaction that the impact type formula occurs, it is characterized by: this safety clutch (32) is arranged in the cutter chuck (8) outside housing (4), and when turning moment that can't change by the given in advance but user of manufacturer is exceeded, rotation is connected remove.