CA1309077C - Adjustable tool support - Google Patents
Adjustable tool supportInfo
- Publication number
- CA1309077C CA1309077C CA000552524A CA552524A CA1309077C CA 1309077 C CA1309077 C CA 1309077C CA 000552524 A CA000552524 A CA 000552524A CA 552524 A CA552524 A CA 552524A CA 1309077 C CA1309077 C CA 1309077C
- Authority
- CA
- Canada
- Prior art keywords
- tool
- support sleeve
- stand
- sleeve
- support
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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- Drilling And Boring (AREA)
Abstract
ABSTRACT
A tool support stand includes carrying means for a drill or similar tool connected to the upper end of an inner support sleeve which is slidably and axially movable within an outer support sleeve. The outer support sleeve is in turn slidably and axially movable within a mounting block carried by at least three legs. An hydraulic cylinder and ram mounted coaxially within the support sleeves can move the inner sleeve within the outer sleeve and an auxiliary drive mechanism is operable to effectively extend the stroke of the ram by moving the outer sleeve upwardly within the mounting block. The carrying means may include devices to assist the orientation of the tool relative to a workpiece.
A tool support stand includes carrying means for a drill or similar tool connected to the upper end of an inner support sleeve which is slidably and axially movable within an outer support sleeve. The outer support sleeve is in turn slidably and axially movable within a mounting block carried by at least three legs. An hydraulic cylinder and ram mounted coaxially within the support sleeves can move the inner sleeve within the outer sleeve and an auxiliary drive mechanism is operable to effectively extend the stroke of the ram by moving the outer sleeve upwardly within the mounting block. The carrying means may include devices to assist the orientation of the tool relative to a workpiece.
Description
1 3nqo77 ADJUSTABLE TOOL SUPPORT FOR DRILL PRESSES OR THE LIKE
This invention relates to an adjustable support adapted to carry and assist in the positioning of drills or similar tools at the location where the drill or other tool is to operate on a workpiece. As the invention has been devis~d for use particularly in relation to hand operated heavy duty drillsl it will be described in that conte~t in the following description. It is to be appreciated however that other tools which require accurate positioning in relation to a workpiece may take the place of the drill which is described in the following specification.
Hand operated drills which are of sufficiently heavy capacity to be used with twist drills which will form holes of three quarters of an inch or larger diameter are commonly used in workshops or on building construction sites to produce holes, for example, in steel plates or beams, to enable passage through the formed hole of a bolt, tube or other component of the structure being formed. One particular application is in the assembly of the steel framework used to make up the chassis of a truck or similar vehicle.
Various problems are encountered in the use of such drills due to the need to accurately locate and maintain the alignment of the drill in relation to the workpiece while the drilling operation proceeds. Many locations in which holes must be drilled do not provide convenient access for the person (or sometimes persons) operating the drill so that a considerable portion of the time involved in producing the hole may be spent in locating, maintaining the position during drilling, and then relocating the drill.
It has previously been proposed to provide heavy drills with a connected electromagnet which will maintain the location of the drill in relation in to a ferro-magnetic workpiece. Ho~ever, such attachments are limited in their applicability by the location of the hole or holes which must be drilled as well as the materials from which the workpiece may be constructed.
37 It is an object of the present invention to provide an ~ 3~9077 adjustable drill support which will assist in ov~rcoming the problems of the prior art by providing a portable support which can be adjusted in a plurality of areas, thus orming a particularly versatile and useful item of equipment.
Accordingly the present invention provides a tool support stand including at least three legs carrying a mounting block; an outer support sleeve slidably supported and a~ially movable within the mounting block between upper and lower limits; an inner support sleeve slidably supported by and a~ially movable within the outer support sleeve between upper and lower limits; an hydraulic cylinder and ram mounted coa~ially within the support sleeves with the lower end of the cylinder connected to the lower end of the outer support sleeve below the lower limit of travel for the inner support sleeve and the upper end of the ram connected to the upper end of the inner support sleeve whereby the inner support sleeve can be moved within the outer support sleeve, the hydraulic cylinder being operatively connectable to an hydraulic pump assembly by hydraulic supply and return lines; an au~iliary drive mechanism operable to effectively e~tend the stroke of the ram by moving the outer sleeve upwardly within the mounting block; and carrying means connected to the upper end of the inner support sleeve to carry the tool with which the support stand is to be usedc The support stand of the invention includes at least three, preferably four, less carrying a mounting blockO For ready portability, each leg is preferably supported at its base by wheel, more preferably a swivelled castor wheel.
The mounting block supported by the legs is preferably held by the legs with its a~is substantially perpendicular to the floor or other surface on which the legs are supported. For convenience the following description and claims will refer to the mounting block and other components of the support stand as being in the position where the a2is of the mounting block is vertical. The mounting block slideably supports an outer support sleeve which is axially moveable within the mounting block. In turn, the outer 38 support sleeve itself slideably supports an inner support MX
1 30q()77 sleeve which is a~ially moveable within the outer support s leeve .
An hydraulic cylinder and ram are mounted coaxially within the support sleeves with the lower end of the cylinder connected to the lower end of the outer support sleeve below the lower limit of travel for the inner support sleeve. The upper end of the ram or piston which travels within ~he hydraulic cylinder is connected adjacent the upper end of the inner support sleeve. The hydraulic cylinder is connected to an hydraulic pump assembly by hydraulic supply and return lines. The hydraulic pump assembly is preferably hand operated to apply pressure within the hydraulic cylinder and to release the applied pressure as desired.
The support stand of the present invention further includes an auxiliary drive mechanism operable to effectively exten~ the stroke of the hydraulic ram. In a preferred form of the present invention the au~iliary dr;ve mechanism includes at least one and preferably two chain and sprocket assemblies. In each chain and sprocket assembly, one end of the chain is fi~ed to the e~terior of the mounting block and runs from this fi~ed connection over a sprocket rotatably mounted adjacent the base o~ the outer support sleeve to e~tend to a point where the othe-r end of the chain is mounted within the inner support sleeve. The operation of the hydraulic cylinder and ram and its cooperation with the chain and sprocket auxiliary drive mechanism will be described later in this specification with reference to the accompanying drawings.
The support stand of the present invention ~uxther includes a carrying means co~nected to the upper end of the inner support sleeve to carry the drill or other tool with which the support stand is to be used. Preferably the carrying means is attached so as to be rotatable about the a~is of the support sleeves. The carrying means may simply consist of a plate allowing attachment of a mounting bracket drive means hereinater described. However, in one form of 38 the invention the carrying means includes an extension arm MK
1 ~OqO77 which enables the drill mounted on the mounting bracket to be used in locations which would not otherwise be accessible if the carrying means is simply in the form of a plate to which the mounting bracket drive means is attached.
Where the carrying means includes an e~tension arm, it is preferable that the end of the e~tension arm remote from the mounting brac~et and its drive means is provided with a counter balance to the weight of the mounting bracket and drill which will be located~ in use, at or near the other end of the e~tension arm. The extension ar~ may also be provided with spring or other damping means to counter rapid movement of the drill or other mechanisms at the end of the e~tension arm and thus improve the stability of the equipment as a whole.
As indicated above, a mounting bracket drive means is preferably attached, for e~arnple by welding, to the carrying meansO The mounting bracket drive means preferably consists of a worm drive assembly which may be hand operated to turn the mounting bracket in a plane substantially parallel with the axis of the support sleeves.
The mounting bracket which is driven by the mounting bracket drive means is adapted to cooperate with a mounting collar or similar device attached to the body of the dr;ll with which the support stand is to be used. Preferably the mounting bracket includes a column about which a mount;ng collar attached to the drill body is adjustably rotatable but the bracket and collar can be adapted for a single fi~ed position at any desired location relative to each other The preferred form of drill to be used in association with the support stand of the present invention includes a magnetic drill stand assembly incorporating an electromagnet which can be activated to hold the drill in position relative to a ferromagnetic workpiece, once the drill has been placed in the desira~ position relative to the workpiece. However, it is to be understood that the drill support of the present invention is not dependent for its utility upon use with a magnetic drill stand assembly, as 38 other means can be employed to maintain the relative positions of the drill assembly and the workpiece during operation of the drill. For e~ample, one or more mechanically actuated suction cups could be used to maintain the drill assembly position relative to a non- ferromagnetic workpiece.
In order that the invention can be more clearly understood, one preferred form of drill support will now be described with reference to the accompanying drawings which show the drill support when used with a magnetic drill stand assembly. It is to be understood however that the accompanying drawings are provided for the purposes of illustration only and that the features of these drawings are not to be construed as limiting the generality of the foregoing description.
In the drawings:
Figure l is an elevation view showing the drill stand and associated drill assembly with the drill stand in an extended position;
Figure 2 is a further elevation taken at 90 to the elevation view of Figure l and showing the support stand in its contracted position;
Figure 3 i~ a plan view of the drill support as shown in Figure l;
Figure 4 is a detail view, partly in section, showing the attachment of the au~iliary drive m~chanism.
In the embodiment of the invention shown in the accompanying drawings, the support stand l includes four legs 2 each supported at its base by a castor wheel 3. Legs 2 are attached to mounting block 4 within which outer 30 support sleeve 5 is slideably mounted. Inner support sleeve 6 is in turn slideably mounted within outer support sleeve 5. Hydraulic cylinder and ram 7, 8 are mounted a~ially within the support sleeves with the lower end of the cylinder 7 being mounted at 9, adjacent the base of the outer support sleeve 5 and the ram 8 being mounted at lO, adjacent the top of the inner support sleeve 6.
Hydraulic pump assembly 11 including pump handle 12 3a and supply/return lines 13 are adjustably connected to one of legs 2 by bracket 1~. Th~ adjustable bracket 14 enables movement of the pump assembly as by raising from the position shown so that the handle 12 will be more accessible when the support stand is in an e~tended position.
Sprockets 15 are mounted adjacent the lower end of outer support sleeve 5 and carry respective chains 16, the opposite ends of which are attached respectively to mounting block 4 at 17 and adjacent the lower end of inner support sleeve 6 at 18.
In order to e~tend the support stand from the position shown i~ Figure 2 to the position shown in Yigure hydraulic pump assembly 11 (which is omitted for simplicity in Figure 2) is operated to force ram 8 from cylinder 7. As ram 8 raises the inner support sleeve 6 to which it is connected, the connection of chains 16 to the lower end of the inner sleeve 6 acts through sprockets 15 and the fi~ed attachment of the other end of the chain 16 at 17 to the mounting block 14 to draw outer support sleeve 5 upwardly through mounting block 4. The effective movement of ram 8 within hydraulic cylinder 7 is thus substantially doubled.
The lifting mechanism thus described provides for vertical adjustment of the support stand and thus gives a primary means of locating the drill chuck and the tip of the twist drill which it carries, relative to the workpiece.
The inner and outer support sleeves 5, 6 may be protected if desired by an e~pandible sleeve 19 as shown in the drawings.
Carrying means consisting of plate 20 is rotatably attached through bolt and nut 21 to the top of inner support sleeve 6. The rotatable attachment of carrying plate 20 permits adjustment of the plate in the normally horizontal plane perpendicular to the a~is of the support sleeves. Nut 21 can be locked into position when the location of plate 20 is detPrmined.
Mounting bracket drive means including worm drive assembly 22 is fi~ed to carrying plate 20 as by welding an appropriate part of the assembly to the plate. The worm drive assembly 22 includes handwheel 23, handle 24, gear 38 housing 25 and drive spindle housing 2~. The drive spindle is connected to mounting bracket 27 which in the illustrated embodiment comprises a column slideably mountahle within the bore of connector bracket 28 and which can be fi~ed in relation to the connector bracket by locknut 29.
Connector bracket 28 forms part of magnetic drill stand assembly 30 and, as illustrat,ed, this asse~bly includes an oppositely mounted connector bracket 31 to permit left handed connection of the dxill assembly to mounting bracket 27~ Drill assembly 30 further includes operating wheel 32 enabling the drill 33 to be raised or lowered by rack and pinion mechanism 34. The attachme~t of magnetic drill stand assembly 30 to a ferromagnet;c workpiece is achieved through electromagnet 35 once the desired position of the drill relative to the workpiece has been achieved by movement of the various adjustment features in the drill assembly and in the support stand of the present invention.
As previously indicated, height adjustment is provided by the movement of the hydraulic ram and the inner and outer support sleeves while angular adjustment in a horizontal plane can be achieved by movement of the carry;ng means about its point of attachment to the upper end of the inner support sleeve. Additional or alternative angular adjustment can be obtained by movement of the drill assembly about the vertical a~is of th~ mounting bracket.
In the embodiment illustrated, the relati~e size of the mechanisms employed in this area of the assembly allow for adjustment of the drill position through 105 in a horizontal plane between the two e2tremes indicated in broken lines in Figure 3. It will be appreciated that the amount of adjustment obtainable in this area will depend both on the size and relative location of the drill and of the worm drive assembly 22 attached to the carrying plate.
In addition and as illustrated in Figure 1, 360 adjustment of the drill assembly in a vertical plane can be achieved by rotating the drill assembly through the mounting bracket drive means. As illustrated, this adjustment is 38 achieved by turning the handwheel 29 of the worm drive 1 3 0~ 07 1 assembly so as to turn the drive pinion and the associated mounting bracket 27 which carries the drill assembly.
The present invention thus provides a drill support which is adjustable in a plurality of different ways so as to bring the drill assembly which it supports into a useful working position, providing access to workpieces which would otherwise be inaccessib:Le for a properly supported drill. The drill support of the invention further provides a readily portable device which enables operation of a heavy drill by a single person without the strain and fatigue presently associated with such operation.
Accordingly, use of the present drill support permits more rapid and efficient drilling of heavy workpieces and thus improves the safety and economy with which such operations can be performed.
., ~
This invention relates to an adjustable support adapted to carry and assist in the positioning of drills or similar tools at the location where the drill or other tool is to operate on a workpiece. As the invention has been devis~d for use particularly in relation to hand operated heavy duty drillsl it will be described in that conte~t in the following description. It is to be appreciated however that other tools which require accurate positioning in relation to a workpiece may take the place of the drill which is described in the following specification.
Hand operated drills which are of sufficiently heavy capacity to be used with twist drills which will form holes of three quarters of an inch or larger diameter are commonly used in workshops or on building construction sites to produce holes, for example, in steel plates or beams, to enable passage through the formed hole of a bolt, tube or other component of the structure being formed. One particular application is in the assembly of the steel framework used to make up the chassis of a truck or similar vehicle.
Various problems are encountered in the use of such drills due to the need to accurately locate and maintain the alignment of the drill in relation to the workpiece while the drilling operation proceeds. Many locations in which holes must be drilled do not provide convenient access for the person (or sometimes persons) operating the drill so that a considerable portion of the time involved in producing the hole may be spent in locating, maintaining the position during drilling, and then relocating the drill.
It has previously been proposed to provide heavy drills with a connected electromagnet which will maintain the location of the drill in relation in to a ferro-magnetic workpiece. Ho~ever, such attachments are limited in their applicability by the location of the hole or holes which must be drilled as well as the materials from which the workpiece may be constructed.
37 It is an object of the present invention to provide an ~ 3~9077 adjustable drill support which will assist in ov~rcoming the problems of the prior art by providing a portable support which can be adjusted in a plurality of areas, thus orming a particularly versatile and useful item of equipment.
Accordingly the present invention provides a tool support stand including at least three legs carrying a mounting block; an outer support sleeve slidably supported and a~ially movable within the mounting block between upper and lower limits; an inner support sleeve slidably supported by and a~ially movable within the outer support sleeve between upper and lower limits; an hydraulic cylinder and ram mounted coa~ially within the support sleeves with the lower end of the cylinder connected to the lower end of the outer support sleeve below the lower limit of travel for the inner support sleeve and the upper end of the ram connected to the upper end of the inner support sleeve whereby the inner support sleeve can be moved within the outer support sleeve, the hydraulic cylinder being operatively connectable to an hydraulic pump assembly by hydraulic supply and return lines; an au~iliary drive mechanism operable to effectively e~tend the stroke of the ram by moving the outer sleeve upwardly within the mounting block; and carrying means connected to the upper end of the inner support sleeve to carry the tool with which the support stand is to be usedc The support stand of the invention includes at least three, preferably four, less carrying a mounting blockO For ready portability, each leg is preferably supported at its base by wheel, more preferably a swivelled castor wheel.
The mounting block supported by the legs is preferably held by the legs with its a~is substantially perpendicular to the floor or other surface on which the legs are supported. For convenience the following description and claims will refer to the mounting block and other components of the support stand as being in the position where the a2is of the mounting block is vertical. The mounting block slideably supports an outer support sleeve which is axially moveable within the mounting block. In turn, the outer 38 support sleeve itself slideably supports an inner support MX
1 30q()77 sleeve which is a~ially moveable within the outer support s leeve .
An hydraulic cylinder and ram are mounted coaxially within the support sleeves with the lower end of the cylinder connected to the lower end of the outer support sleeve below the lower limit of travel for the inner support sleeve. The upper end of the ram or piston which travels within ~he hydraulic cylinder is connected adjacent the upper end of the inner support sleeve. The hydraulic cylinder is connected to an hydraulic pump assembly by hydraulic supply and return lines. The hydraulic pump assembly is preferably hand operated to apply pressure within the hydraulic cylinder and to release the applied pressure as desired.
The support stand of the present invention further includes an auxiliary drive mechanism operable to effectively exten~ the stroke of the hydraulic ram. In a preferred form of the present invention the au~iliary dr;ve mechanism includes at least one and preferably two chain and sprocket assemblies. In each chain and sprocket assembly, one end of the chain is fi~ed to the e~terior of the mounting block and runs from this fi~ed connection over a sprocket rotatably mounted adjacent the base o~ the outer support sleeve to e~tend to a point where the othe-r end of the chain is mounted within the inner support sleeve. The operation of the hydraulic cylinder and ram and its cooperation with the chain and sprocket auxiliary drive mechanism will be described later in this specification with reference to the accompanying drawings.
The support stand of the present invention ~uxther includes a carrying means co~nected to the upper end of the inner support sleeve to carry the drill or other tool with which the support stand is to be used. Preferably the carrying means is attached so as to be rotatable about the a~is of the support sleeves. The carrying means may simply consist of a plate allowing attachment of a mounting bracket drive means hereinater described. However, in one form of 38 the invention the carrying means includes an extension arm MK
1 ~OqO77 which enables the drill mounted on the mounting bracket to be used in locations which would not otherwise be accessible if the carrying means is simply in the form of a plate to which the mounting bracket drive means is attached.
Where the carrying means includes an e~tension arm, it is preferable that the end of the e~tension arm remote from the mounting brac~et and its drive means is provided with a counter balance to the weight of the mounting bracket and drill which will be located~ in use, at or near the other end of the e~tension arm. The extension ar~ may also be provided with spring or other damping means to counter rapid movement of the drill or other mechanisms at the end of the e~tension arm and thus improve the stability of the equipment as a whole.
As indicated above, a mounting bracket drive means is preferably attached, for e~arnple by welding, to the carrying meansO The mounting bracket drive means preferably consists of a worm drive assembly which may be hand operated to turn the mounting bracket in a plane substantially parallel with the axis of the support sleeves.
The mounting bracket which is driven by the mounting bracket drive means is adapted to cooperate with a mounting collar or similar device attached to the body of the dr;ll with which the support stand is to be used. Preferably the mounting bracket includes a column about which a mount;ng collar attached to the drill body is adjustably rotatable but the bracket and collar can be adapted for a single fi~ed position at any desired location relative to each other The preferred form of drill to be used in association with the support stand of the present invention includes a magnetic drill stand assembly incorporating an electromagnet which can be activated to hold the drill in position relative to a ferromagnetic workpiece, once the drill has been placed in the desira~ position relative to the workpiece. However, it is to be understood that the drill support of the present invention is not dependent for its utility upon use with a magnetic drill stand assembly, as 38 other means can be employed to maintain the relative positions of the drill assembly and the workpiece during operation of the drill. For e~ample, one or more mechanically actuated suction cups could be used to maintain the drill assembly position relative to a non- ferromagnetic workpiece.
In order that the invention can be more clearly understood, one preferred form of drill support will now be described with reference to the accompanying drawings which show the drill support when used with a magnetic drill stand assembly. It is to be understood however that the accompanying drawings are provided for the purposes of illustration only and that the features of these drawings are not to be construed as limiting the generality of the foregoing description.
In the drawings:
Figure l is an elevation view showing the drill stand and associated drill assembly with the drill stand in an extended position;
Figure 2 is a further elevation taken at 90 to the elevation view of Figure l and showing the support stand in its contracted position;
Figure 3 i~ a plan view of the drill support as shown in Figure l;
Figure 4 is a detail view, partly in section, showing the attachment of the au~iliary drive m~chanism.
In the embodiment of the invention shown in the accompanying drawings, the support stand l includes four legs 2 each supported at its base by a castor wheel 3. Legs 2 are attached to mounting block 4 within which outer 30 support sleeve 5 is slideably mounted. Inner support sleeve 6 is in turn slideably mounted within outer support sleeve 5. Hydraulic cylinder and ram 7, 8 are mounted a~ially within the support sleeves with the lower end of the cylinder 7 being mounted at 9, adjacent the base of the outer support sleeve 5 and the ram 8 being mounted at lO, adjacent the top of the inner support sleeve 6.
Hydraulic pump assembly 11 including pump handle 12 3a and supply/return lines 13 are adjustably connected to one of legs 2 by bracket 1~. Th~ adjustable bracket 14 enables movement of the pump assembly as by raising from the position shown so that the handle 12 will be more accessible when the support stand is in an e~tended position.
Sprockets 15 are mounted adjacent the lower end of outer support sleeve 5 and carry respective chains 16, the opposite ends of which are attached respectively to mounting block 4 at 17 and adjacent the lower end of inner support sleeve 6 at 18.
In order to e~tend the support stand from the position shown i~ Figure 2 to the position shown in Yigure hydraulic pump assembly 11 (which is omitted for simplicity in Figure 2) is operated to force ram 8 from cylinder 7. As ram 8 raises the inner support sleeve 6 to which it is connected, the connection of chains 16 to the lower end of the inner sleeve 6 acts through sprockets 15 and the fi~ed attachment of the other end of the chain 16 at 17 to the mounting block 14 to draw outer support sleeve 5 upwardly through mounting block 4. The effective movement of ram 8 within hydraulic cylinder 7 is thus substantially doubled.
The lifting mechanism thus described provides for vertical adjustment of the support stand and thus gives a primary means of locating the drill chuck and the tip of the twist drill which it carries, relative to the workpiece.
The inner and outer support sleeves 5, 6 may be protected if desired by an e~pandible sleeve 19 as shown in the drawings.
Carrying means consisting of plate 20 is rotatably attached through bolt and nut 21 to the top of inner support sleeve 6. The rotatable attachment of carrying plate 20 permits adjustment of the plate in the normally horizontal plane perpendicular to the a~is of the support sleeves. Nut 21 can be locked into position when the location of plate 20 is detPrmined.
Mounting bracket drive means including worm drive assembly 22 is fi~ed to carrying plate 20 as by welding an appropriate part of the assembly to the plate. The worm drive assembly 22 includes handwheel 23, handle 24, gear 38 housing 25 and drive spindle housing 2~. The drive spindle is connected to mounting bracket 27 which in the illustrated embodiment comprises a column slideably mountahle within the bore of connector bracket 28 and which can be fi~ed in relation to the connector bracket by locknut 29.
Connector bracket 28 forms part of magnetic drill stand assembly 30 and, as illustrat,ed, this asse~bly includes an oppositely mounted connector bracket 31 to permit left handed connection of the dxill assembly to mounting bracket 27~ Drill assembly 30 further includes operating wheel 32 enabling the drill 33 to be raised or lowered by rack and pinion mechanism 34. The attachme~t of magnetic drill stand assembly 30 to a ferromagnet;c workpiece is achieved through electromagnet 35 once the desired position of the drill relative to the workpiece has been achieved by movement of the various adjustment features in the drill assembly and in the support stand of the present invention.
As previously indicated, height adjustment is provided by the movement of the hydraulic ram and the inner and outer support sleeves while angular adjustment in a horizontal plane can be achieved by movement of the carry;ng means about its point of attachment to the upper end of the inner support sleeve. Additional or alternative angular adjustment can be obtained by movement of the drill assembly about the vertical a~is of th~ mounting bracket.
In the embodiment illustrated, the relati~e size of the mechanisms employed in this area of the assembly allow for adjustment of the drill position through 105 in a horizontal plane between the two e2tremes indicated in broken lines in Figure 3. It will be appreciated that the amount of adjustment obtainable in this area will depend both on the size and relative location of the drill and of the worm drive assembly 22 attached to the carrying plate.
In addition and as illustrated in Figure 1, 360 adjustment of the drill assembly in a vertical plane can be achieved by rotating the drill assembly through the mounting bracket drive means. As illustrated, this adjustment is 38 achieved by turning the handwheel 29 of the worm drive 1 3 0~ 07 1 assembly so as to turn the drive pinion and the associated mounting bracket 27 which carries the drill assembly.
The present invention thus provides a drill support which is adjustable in a plurality of different ways so as to bring the drill assembly which it supports into a useful working position, providing access to workpieces which would otherwise be inaccessib:Le for a properly supported drill. The drill support of the invention further provides a readily portable device which enables operation of a heavy drill by a single person without the strain and fatigue presently associated with such operation.
Accordingly, use of the present drill support permits more rapid and efficient drilling of heavy workpieces and thus improves the safety and economy with which such operations can be performed.
., ~
Claims (10)
1. A tool support stand including at least three legs carrying a mounting block; an outer support sleeve slidably supported and axially movable within the mounting block between upper and lower limits; an inner support sleeve slidably supported by and axially movable within the outer support sleeve between upper and lower limits; an hydraulic cylinder and ram mounted coaxially within the support sleeves with the lower end of the cylinder connected to the lower end of the outer support sleeve below the lower limit of travel for the inner support sleeve and the upper end of the ram connected to the upper end of the inner support sleeve whereby the inner support sleeve can be moved within the outer support sleeve, the hydraulic cylinder being operatively connectable to an hydraulic pump assembly by hydraulic supply and return lines; an auxiliary drive mechanism operable to effectively extend the stroke of the ram by moving the outer sleeve upwardly within the mounting block; and carrying means connected to the upper end of the inner support sleeve to carry the tool with which the support stand is to be used.
2. A tool support stand as claimed in Claim 1 wherein the carrying means is connected also to a mounting bracket detachably connectable to said tool, the mounting bracket being connected to the carrying means through mounting bracket drive means adapted to turn the mounting bracket in a plane substantially parallel with the axis of the support sleeves.
3. A tool support stand as claimed in Claim 2 wherein the mounting bracket drive means consists of a worm drive assembly hand operable to turn the mounting bracket.
4. A tool support stand as claimed in any of Claims 1, 2 or 3 wherein the auxiliary drive mechanism includes at least one chain and sprocket assembly, each chain having one end fixed to the exterior of the mounting block and running therefrom over a sprocket rotatably mounted adjacent the base of the outer sleeve to a point within the inner support sleeve where the other end of the chain is fixed so that movement of the inner support sleeve out of the outer support sleeve draws the outer support sleeve out of the mounting block.
5. A tool support stand as claimed in Claim 1 wherein said carrying means is rotatable about the axis of the support sleeves.
6. A tool support stand as claimed in Claim 2 wherein the mounting bracket includes a column about which a mounting collar on the tool with which the stand is to be used is adjustably rotatable.
7. A tool support stand as claimed in Claim 2 wherein the carrying means includes an extension arm and the mounting bracket is connected at the end of the arm remote from the connection of the carrying means to the inner support sleeve.
8. A tool support stand as claimed in Claim 7 wherein the extension arm includes a counter balance to the weight of the tool with which the stand is to be used.
9. A tool support stand as claimed in Claim 7 wherein the extension arm includes damping means to counter rapid movement of the said remote end of the arm.
10. A tool support stand as claimed in Claim 7 wherein the extension arm includes a counter balance to the weight of the tool with which the stand is to be used and damping means to counter rapid movement of the said remote end of the arm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPH9121/86 | 1986-11-24 | ||
| AUPH912186 | 1986-11-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1309077C true CA1309077C (en) | 1992-10-20 |
Family
ID=3771905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000552524A Expired - Lifetime CA1309077C (en) | 1986-11-24 | 1987-11-23 | Adjustable tool support |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1309077C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110654135A (en) * | 2019-10-18 | 2020-01-07 | 佛山科学技术学院 | Book pressing device |
-
1987
- 1987-11-23 CA CA000552524A patent/CA1309077C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110654135A (en) * | 2019-10-18 | 2020-01-07 | 佛山科学技术学院 | Book pressing device |
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