CN201172117Y

CN201172117Y - Large hole saw mandrel device

Info

Publication number: CN201172117Y
Application number: CNU2007201866204U
Authority: CN
Inventors: 马克·E·布伦森
Original assignee: Black and Decker Inc
Current assignee: Black and Decker Inc
Priority date: 2007-11-16
Filing date: 2007-11-16
Publication date: 2008-12-31
Anticipated expiration: 2017-11-16

Abstract

A hole saw mandrel comprises a mandrel body provided with at least one hole, a pilot guide bit hole and a first end part connected with the body, wherein, the first end part is connected with a drive; a second end part extends from the body and comprises a threaded rod; a sliding collar can axially move on the mandrel body; the sliding collar comprises at least one pin bolt which extends at the hole of the mandrel body; an elastic element is close to a screw element for increasing the firmness of the hole saw; the sliding collar has magnetism to prevent the pin bolt from falling from the hole saw; a setting element is arranged in the pilot guide bit hole to provide the direction demanded by the pilot guide bit.

Description

Large-scale hole saw spindle unit

Technical field

This is novel to relate to a kind of hole saw, particularly relates to a kind of spindle unit that can remove hole saw easily.

Background technology

Be provided with the hole saw spindle unit in the prior art.Usually, this hole saw spindle unit comprises the threaded rod that can hold hole saw.Spindle unit also comprises the pin that matches with the hole on the hole saw bottom surface, and pin is used for keeping in use the hole saw location.When hole saw during in user mode, but hole saw normally loosening or between pin play, hole saw can slightly be moved.This mainly is because when hole saw was fastened on the axle, the hole on the hole saw bottom surface was not aimed at pin.Thus, can match with the hole on the hole saw bottom surface for making pin, hole saw must retreat from the contact-making surface with axle.Therefore, hole saw just can produce vibration and noise in use.

In addition, in use, owing to have play between hole saw and the pin, pin may come off from hole saw.Because pin is attached to the spring on the sliding collar, in order to remove hole saw, pin is removed from hole saw by the axle body, so just can't utilize big spring force.This is because sliding collar must be moved by the user.Thus, spring force must be able to make sliding collar move easily and well pin do not remained in the hole saw.

Equally, hole saw generally comprises the hole that is used to hold starter (pilot drill bit).The hole generally include one group perpendicular to the screw thread of axially bored line so that guiding is bored remains in the hole.The hole all provides identical maintaining body for right cylindrical and for the various types of handles on the starter.

Thus, hope can be eliminated the play between hole saw and the axle.Same, hope can be increased in the confining force of the pin in the hole saw hole.In addition, hope can provide a kind of starter hole, and it can hold various starters with dissimilar pommel portion.

Novel content

This novel defective that has overcome in original technology.This is novel to provide a kind of flexible member, and when hole saw during in user mode, flexible member is by the hole saw contact and compress, to eliminate the play between hole saw and the axle body.This is novel also to provide a kind of magnetic sliding collar, and the attraction axle body of its magnetic to be increasing the connection between sliding collar and the axle body, thereby stops pin to come off from the hole of hole saw.This is novel also to provide a kind of setting element in the starter hole, thinks that starter provides desired direction.

According to this first novel aspect, the hole saw spindle unit comprises axle, and axle comprises the body with at least one hole.First end is connected body with driver, for example drill motor.The second end is from the body extension and comprise threaded rod.Sliding collar can move on body vertically.Sliding collar comprises at least one pin, and at least one hole that pin extends through the axle body enters hole saw.Flexible member adjacent threads bar.Flexible member compression when touching the hole saw that is screwed on the screwing element.Flexible member has been eliminated the play between the hole saw and axle body when user mode.Flexible member can be the O shape ring around threaded rod.O shape is encircled adjacency and is placed on the axle body.

According to this second novel aspect, the hole saw spindle unit comprises axle, and axle comprises the body with at least one hole, the first end that is connected with body.First end is connected with driver, for example drill motor.The second end is from the body extension and comprise threaded rod.Sliding collar moves axially on body.Sliding collar comprises at least one pin, and pin extends through at least one hole of axle body so that be connected with hole saw.Sliding collar has magnetic, and it can magnetically attract the axle body like this.Strengthen being connected of sliding collar and axle body like this, thereby can stop at least one pin from hole saw, to come off.One or more magnets can be embedded into and be connected with sliding collar.One or more magnets can center on the sliding collar equidistant placement.

According to this 3rd novel aspect, the axle that the hole saw spindle unit comprises, axle have the body that comprises at least one hole, with the first end that is connected with body.First end connects driver, for example drill motor.The second end extends from body, and the second end comprises threaded rod.Sliding collar can move axially on body.Sliding collar comprises at least one pin, and at least one hole that pin extends through the axle body enters hole saw.Setting element is in the starter hole of axle body.Setting element provides desired direction for the starter on spindle unit.Setting element comprises flat part in the hole.Flat hole is positioned at the dog screw back, and dog screw keeps starter in pilot hole.

According to this 4th novel aspect, the hole saw spindle unit comprises axle, and axle comprises the body with at least one hole, the first end that is connected with body.First end connects driver, for example drill motor.The second end extends from body, and the second end comprises threaded rod.Sliding collar can move axially on body.Sliding collar comprises at least one pin, and at least one hole that pin extends through in the axle body enters hole saw.Flexible member adjacent threads element.Flexible member compression when touching the hole saw that is screwed on the threaded rod.Flexible member can stop vibration and play.Sliding collar has magnetic, and sliding collar magnetically attracts body strengthening being connected between sliding collar and the axle body thus, thereby can prevent that at least one pin from coming off from hole saw.In addition, setting element is in the starter hole so that the desired direction of starter to be provided.Dog screw with the head of screw that is used for receiving multiple instrument makes starter remain on axle.

Other scopes of application clearly are provided from the description that provides here.The description and the specific embodiment that are appreciated that specification only are to illustrate for example, rather than this novel protection domain of restriction.

Description of drawings

The accompanying drawing here only is for illustrative purposes, anything but in order to limit this novel scope of disclosure by any way.

Fig. 1 is the perspective view of hole saw spindle unit;

Fig. 2 is along the sectional view of 2-2 line among Fig. 1; With

Fig. 3 is that Fig. 1 has removed the front plan view of hole saw axle behind the starter.

The specific embodiment

Below description only be exemplary, and do not limit this novel open, application or use.

As shown in drawings, the spindle unit of 10 expressions of the Reference numeral among the figure and signal hole saw.Hole saw 12 shows in the drawings.Equally, starter extends from spindle unit 10.

Spindle unit 10 comprises axle body 16.Axle body 16 comprises first end 18 and the second end 20.First end 18 have outer polygon with driver for example drill motor match.The second end 20 has threaded rod 22, and threaded rod 22 receives hole saw 12 in habitual mode.

Axle body 16 has a column part 24 in abutting connection with the expansion of first end 18, and the column part 24 of expansion ends at the columniform axle collar 26.The columniform axle collar 26 comprises the positioning screw hole 28 that is used to receive dog screw 30.Equally, hole 32 extends through cylindrical collar 26.Hole 32 receives latch, and latch will be explained in the back.In addition, starter hole 34 extends through the column part 24 that the second end 20 enters cylindrical collar 26 and enlarges.

Cylindrical hole 34 limits periphery 36, and surface 36 has the flat part 38 of the end 40 of adjacent bores.Flat part 38 comprises the plane of the axis that is parallel to hole 34.Flat part 38 provides and makes starter be positioned at surface in the hole 34.Starter contact flat part 38 with independent flat handle branch or three petioles part.Like this for starter provides correct direction in hole 34, make starter be positioned at the position of requirement simultaneously with respect to dog screw, drill bit is fixed in the hole 34.Under the situation of columniform starter, the terminal part of drill bit contacts flat part 38 so that it is located with respect to dog screw.

Flexible member 44 is positioned on the second end 20 of axle body 16.Flexible member 44 can be the RUBBER O shape ring around threaded rod 22.Flexible member 44 provides the compressing member of the spindle unit 10 of hole saw.When being screwed to hole saw 12 on the threaded rod 22, rotation hole saw 12 is up to its contact resilient element 44.Because flexible member 44 is against the surface of cylindrical collar 26, flexible member compresses when contact hole saw 12.Continue rotation hole saw 12 in pin 54 extends into hole 46 on hole saw 12 bottom surfaces.Thus, hole saw 12 in use just can be held in place, and avoids the vibration and the play that exist in original technology.

Sliding collar 50 is positioned on the column part 24 of body 16 expansions.Sliding collar 50 can move axially along the column part 24 that enlarges.Spring 52 provides elastic force to promote sliding collar 50 against the body axle collar 26, and the axle collar 50 comprises at least one, preferably includes a pair of pin 54.The hole 32 of cylindrical collar 26 is passed in pin 54 projections.Pin 54 projection successively penetrates hole 46 on hole saw 12 bottom surfaces, so that hole saw remains on the position on the threaded rod 22.Sliding collar 50 comprises and is used to the sleeve 56 that keeps spring to contact with sliding collar 50.

Sliding collar 50 has magnetic.Thus, the cylindrical collar 26 that sliding collar 50 can magnetic attraction axle body 16.Sliding collar 50 comprises one or more magnets 60, and positioning magnet 60 is surperficial concordant with the sliding collar 50 that is close to cylindrical collar 26.When using a plurality of magnet 60, they are around sliding collar 50 equally spaced layouts.Magnet 60 has further strengthened being held in place of the pin 54 that extends through cylindrical collar 26 and hole saw 12.Can prevent that like this pin 54 from coming off from hole saw 12.

Sliding collar 50 comprises hole 62, and it contacts with the column part 24 that enlarges.Hole 62 has to provide increases the contact surface 64 that contacts with the surface of the column part 24 that enlarges.The surface contact that increases has reduced vibration and the swing of sliding collar 50 on the column part 24 that enlarges.So just can make sliding collar 50 level and smooth moving on the column part 24 that enlarges successively.

Dog screw 30 comprises head of screw 72 and screw rod 74.Head of screw 72 comprises that instrument holds slot 76, and it is used to hold multiple instrument.As shown in the figure, instrument holds slot 76 and is set to hold hexagon wrench or flathead screwdriver.Thus, dog screw 30 can be by one or more different instruments dismountings.

This novel specification in fact only is exemplary, and all within this novel protection domain, such variation should not think to break away from this novel design and scope in the variation that does not therefore break away from this novel essence.

Claims

1. a hole saw spindle unit is characterized in that, comprising:

Axle comprises body with at least one hole and the first end that is connected with described body, and described first end is used for being connected with driver, and the second end extends from described body, and described the second end comprises screwing element;

Sliding collar can move axially on described body, and the described axle collar comprises that at least one extends through the pin at least one hole on the described axle body; And

The flexible member of contiguous described screwing element, when by the hole saw contact that is screwed on the described screwing element, described flexible member compression, described flexible member reduces the vibration and the play of hole saw on the axle.

2. hole saw spindle unit according to claim 1 is characterized in that, described flexible member is the O shape ring around described screwing element.

3. hole saw spindle unit according to claim 2 is characterized in that, described O shape ring is in abutting connection with described axle body.

4. a hole saw spindle unit is characterized in that, comprising:

Sliding collar can move axially on described body, and the described axle collar comprises that at least one extends through the pin in described at least one hole;

Described sliding collar has magnetic, and described like this sliding collar magnetically attracts described body, strengthens being connected between sliding collar and the described body, comes off from hole saw in order to prevent described at least one pin.

5. hole saw spindle unit according to claim 4 is characterized in that, described one or more magnets are connected with described sliding collar.

6. hole saw spindle unit according to claim 5 is characterized in that, described one or more magnet rings are equidistantly arranged around described sliding collar.

7. a hole saw spindle unit is characterized in that, comprising:

Axle comprises the body with at least one hole, and the starter hole is used for being connected with driver with the first end that is connected with described body, described first end, and the second end extends from described body, and described the second end comprises screwing element;

Setting element in described starter hole is used to provide the desired direction of starter.

8. hole saw spindle unit according to claim 7 is characterized in that described setting element is included in the flat horizontal surface in the described hole.

9. hole saw spindle unit according to claim 8 is characterized in that, described flat horizontal surface is positioned at the dog screw back in the described hole.

10. a hole saw spindle unit is characterized in that, comprising:

The flexible member of contiguous described screwing element, when by the hole saw contact that is screwed on the described screwing element, described flexible member compression, described flexible member reduces the vibration and/or the play of hole saw on the axle;

Described sliding collar has magnetic, and described like this sliding collar magnetically attracts described axle body, strengthens being connected between sliding collar and the described body, comes off from hole saw in order to prevent described at least one pin; And

11. hole saw spindle unit according to claim 10 is characterized in that, described dog screw with the head of screw that is used to hold multiple instrument remains in the described axle body described starter.

12. hole saw spindle unit according to claim 10 is characterized in that, described flexible member is the O shape ring around described screwing element.

13. hole saw spindle unit according to claim 11 is characterized in that, described O shape ring is in abutting connection with described axle body.

14. hole saw spindle unit according to claim 11 is characterized in that, described one or more magnets are connected with described sliding collar.

15. hole saw spindle unit according to claim 14 is characterized in that, described one or more magnets are equidistantly arranged around described sliding collar.

16. hole saw spindle unit according to claim 11 is characterized in that described setting element is included in the flat horizontal surface in the described hole.

17. hole saw spindle unit according to claim 16 is characterized in that, described flat horizontal surface is positioned at the dog screw back in the described hole.