WO2016034847A1 - Ensemble de serrage - Google Patents

Ensemble de serrage Download PDF

Info

Publication number
WO2016034847A1
WO2016034847A1 PCT/GB2015/052411 GB2015052411W WO2016034847A1 WO 2016034847 A1 WO2016034847 A1 WO 2016034847A1 GB 2015052411 W GB2015052411 W GB 2015052411W WO 2016034847 A1 WO2016034847 A1 WO 2016034847A1
Authority
WO
WIPO (PCT)
Prior art keywords
end portion
clamp
assembly according
clamp assembly
connecting member
Prior art date
Application number
PCT/GB2015/052411
Other languages
English (en)
Inventor
Alexander Gardiner
Original Assignee
Gardiner Pole Systems Limited
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gardiner Pole Systems Limited filed Critical Gardiner Pole Systems Limited
Publication of WO2016034847A1 publication Critical patent/WO2016034847A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2/00—Friction-grip releasable fastenings
    • F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
    • F16B2/18—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening using cams, levers, eccentrics, or toggles
    • F16B2/185—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening using cams, levers, eccentrics, or toggles using levers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/10—Telescoping systems
    • F16B7/14—Telescoping systems locking in intermediate non-discrete positions
    • F16B7/1418—Telescoping systems locking in intermediate non-discrete positions with a clamping collar or two split clamping rings tightened by a screw or a cammed latch member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/10—Telescoping systems
    • F16B7/14—Telescoping systems locking in intermediate non-discrete positions
    • F16B7/1454—Telescoping systems locking in intermediate non-discrete positions with a clamp locking the telescoping members by swinging a handle provided with a locking cam

Definitions

  • the present invention relates to a clamp assembly for clamping the outer surface of a tubular object, such as a pole.
  • the clamp assembly of the present invention finds use in clamping the outer surface of one or more poles of a pole assembly.
  • Pole assemblies comprising a plurality of individual poles attached or connected end to end are known in the art.
  • known pole assemblies may be divided into two categories: telescopic pole assemblies, in which a first pole extends at least partially within a second pole; and modular pole assemblies, in which first and second poles are connected at their ends.
  • a telescopic pole assembly typically comprises a plurality of poles that may be moved between an extended position and a retracted position. The poles are provided with a range of different nominal diameters. The diameters of the poles are selected such that a given pole may extend partially or wholly within one or more poles of a larger nominal diameter and/or have one or more poles of a smaller nominal diameter extend partially or wholly therewithin.
  • the plurality of poles may be arranged to move between the retracted and extended positions in a telescopic manner.
  • the poles of the assembly are extended telescopically to form a pole assembly of the required length.
  • modular pole assemblies comprise a plurality of individual poles.
  • the poles are not nested and extendable in a telescopic manner. Rather, the pole assembly is constructed by connecting individual poles in an end to end configuration. A plurality of poles are connected in this manner until the pole assembly is of the required length.
  • Both types of pole assembly generally comprise means for locking adjacent or nested poles to achieve the required length. These means include clamps, screw- fitting connections, push-fitting connections and other locking devices. As noted above, the present invention relates to clamp assemblies, more particularly quick release clamp assemblies for attaching poles of a pole assembly, in particular a telescopic pole assembly.
  • Clamps known in the art and used to secure tubular objects generally function by applying a radially compressive force to the outer surface of the tubular object.
  • Quick release clamps function in the same way, whilst incorporating means for enabling the user to engage and disengage the clamp as quickly and as effortlessly as possible.
  • the clamp may be tightened or released by the movement of a single arm or lever.
  • Various quick release clamping mechanisms are known and are commercially available.
  • a common clamping mechanism is disclosed in CA 2428916.
  • This patent relates to a quick release assembly for securing a sleeve about a tubular structure where the sleeve has first and second outwardly projecting lugs that may be drawn together toward one another to compress the sleeve.
  • Each one of the lugs has a bore extending therethrough and is positioned on the sleeve such that the bores are generally aligned with one another.
  • the bore on the first lug is internally threaded.
  • the clamping mechanism comprises an elongate bolt member receivable through the bores in the lugs.
  • the bolt member has a first threaded end that threadably engages the threaded bore through the first lug.
  • the clamping mechanism further comprises a tensioning member operable between an engaged and disengaged position.
  • the tensioning member When in its engaged position, the tensioning member bears against the second lug and draws the first lug toward the second lug to compress the sleeve.
  • the tensioning member When in its disengaged position the tensioning member releases the force drawing the first lug toward the second lug.
  • the amount of compressive force applied by the tensioning member is adjustable through threading the first end of the bolt member into or out of the threaded bore in the first lug.
  • US 2002007538 discloses an alternative quick release clamping mechanism, wherein a hollow cap member is pivotably attached to a base member, both comprising a resiliently deformable block of cushioning material which can be removably inserted.
  • the hollow cap member In the open position, the hollow cap member may be selectively pivoted away from the base member.
  • the hollow cap member In the closed position, the hollow cap member is pivoted towards the base member and the elongate object is releasably received by and between the base member and the hollow cap member.
  • the resiliently deformable block of cushioning material resiliently embraces and cushions the elongate object. The amount of compressive force applied is fixed and can only be altered by changing the resilient deformable block of cushioning material.
  • US 201 1 /0162173 discloses a quick release clamp for a generally cylindrical bar or pipe, comprising a first barrel half and second barrel half.
  • a hinge pin pivotably couples a first edge of the first barrel half with a third edge of the second barrel half.
  • a spring imposes a set force on the barrel halves to bias a second edge of the first barrel half away from a fourth edge of the first barrel half to create a gap, placing the clamp in an open position.
  • a handle includes a base that abuts an outer surface of both barrel halves to compel the second edge of the first barrel half toward the fourth edge of the second barrel half to close the gap, placing the clamp in the closed position.
  • the spring in this case imposes a constant force against the first and second barrel halves.
  • GB 2171444 relates to a clamp for telescopic tubes, the clamp comprising a spring housing mounted on the outer tube, a resilient member helically wound around the inner tube and secured at one end to a ring rotatably journalled on the housing and a lock means for moving the ring from an unlocked position, wherein the spring is relaxed around the inner tube to a locked position, wherein the spring is caused to grip the inner tube and prevent relative movement between the two tubes.
  • a variety of quick release clamp assemblies are known.
  • Pole assemblies offer the advantage of ease of storage, transportation and use.
  • the poles are typically formed using lightweight materials. Such materials allow the pole assembly to be hand held and manipulated by hand. Suitable materials include metals, including aluminium and aluminium alloys, polymers, including fibre-reinforced polymers, in particular polymers reinforced with carbon fibres.
  • the present invention provides a quick release clamp assembly, the quick release clamp assembly comprising;
  • a clamp body for applying a radially compressive force to the outer surface of a pole, the clamp body comprising a first end portion and a second end portion; a connecting member extending between the first and second end portions of the clamp body, the connecting member having a first end portion and a second end portion;
  • an actuator connected to the first end of the connecting member, in use when closing the clamp the actuator moving the second end portion of the clamp body towards the first end portion of the clamp body and relative to the connecting member;
  • the first end portion of the connecting member being connected to the second end portion of the clamp body by a resilient mount, the resilient mount opposing the action of the actuator when closing the clamp and allowing relative movement between the first end portion of the connecting member and the second end portion of the clamp body.
  • the present invention provides a quick release clamp assembly.
  • the clamp assembly may be used for clamping a range of tubular bodies or members, including poles and the like.
  • the clamp assembly of the present invention will be further described with reference to the clamping of a pole.
  • the clamp of the present invention is not to be construed as limited in this respect.
  • the clamp assembly of the present invention comprises a clamp body.
  • the clamp body may be formed from any suitable material or combination of materials.
  • the clamp body may be formed from metal, such as aluminium or alloys thereof. More preferably, the clamp body is formed from high wear resistant materials, including polymers and rubber compounds. More preferably still, the clamp body is formed from a fibre reinforced polymer, in particular glass-fibre reinforced nylon.
  • the clamp body of the present invention can be of any suitable shape.
  • the clamp body is of a shape which in use, is capable of engaging with the outer surface of a pole and applying a radially compressive force. In use, the clamp body extends around the circumference of the pole. To allow for the clamp assembly to accommodate changes in the outer diameter of the pole being clamped, it is preferred that the clamp body extends around part but not all of the circumference of the pole, such that the first and second end portions, described hereinafter, are spaced apart.
  • the clamp body comprises a first end portion and a second end portion.
  • the first and second end portions of the clamp body are urged towards each other, thereby applying the compressive force to the outer surface of the pole.
  • the first and second end portions may be of any shape or form.
  • the first and second end portions project outwardly from the clamp body. It is preferred that the first and second end portions are formed integrally with the clamp body. However, the first and second end portions may be formed separately from the clamp body and be connected thereto.
  • the clamp assembly is applied to the outside of a pole to be clamped with the first and second end portions in an open position and separated by a first distance. The clamp assembly is then operated to apply the compressive force, moving the first and second end portions to a closed position, in which they are separated by a second distance, less than the first distance.
  • the clamp assembly further comprises a connecting member which extends between the first and second end portions of the clamp body.
  • the connecting member is preferably an elongate member such as a bolt or screw. In use, the connecting member is free to move relative to the first and second end portions of the clamp body.
  • At least one of the first and second end portions of the clamp body may comprise a bore therethrough for accommodating the connecting member.
  • the first and second end portions of the clamp body each comprise a bore extending therethrough.
  • the first and second end portions are positioned such that the bores are generally aligned with one another.
  • the bores can be of any suitable shape or size.
  • the connecting member extends through the bores in the first and second end portions and is able to move within both of the bores relative to the respective end portion.
  • the connecting member may have a fixed length.
  • the length of the connecting member may be adjustable.
  • the length of the connecting member is fixed.
  • the connecting member comprises a first end portion and a second end portion.
  • the first end portion of the connecting member is adjacent the second end portion of the clamp body and is connected to the actuator, described hereinafter.
  • Any type of suitable fastening means may be used to connect the first end of the connecting member to the actuator.
  • the fastening means is preferably adjustable, in particular to allow the effective length of the connecting member to be adjusted. Adjustment of the effective length of the connecting member varies the distance between the first and second end portions of the clamp body and the amount of compressive force applied by the clamping assembly in operation.
  • the first end portion of the connecting member is threaded.
  • the second end portion of the connecting member is adjacent the first end portion of the clamp body.
  • the movement of the connecting member relative to the first end portion of the clamp body is limited, in particular to limit movement of the connecting member towards the second end portion of the clamp body.
  • Any suitable means may be used to limit or restrict the movement of the connecting member relative to the first end portion of the clamp body.
  • the second end portion of the connecting member extends through the bore in the first end portion of the clamp body and comprises a head having a larger diameter than the bore in the first end portion of the clamp body.
  • the first end portion of the connecting member is connected to the second end portion of the clamp body by a resilient mount.
  • the resilient mount opposes the action of the actuator when closing the clamp. In doing so, the resilient mount prevents relative movement between the first end portion of the connecting member and the second end portion of the clamp body.
  • the resilient mount yields and allows relative movement between the first end portion of the connecting member and the second end portion of the clamp body.
  • the resilient mount preferably comprises a resilient member disposed between the second end portion of the clamp body and the actuator. In this way, relative movement between the connecting member and the second end portion of the clamp body is possible only by compression of the resilient member.
  • Any suitable resilient member may be employed.
  • the resilient member is a spring, in particular a coil spring.
  • the resilient member is located within an enlarged portion of the bore extending through the second end portion of the clamp body, in particular being seated on a shoulder formed therein.
  • the clamp assembly of the present invention further comprises an actuator.
  • the actuator is connected to the first end portion of the connecting member, as discussed above. In use, the actuator acts between the connecting member and the second end portion of the clamp body to move the connecting member relative to the second end portion of the clamp body and urge the second end portion of the clamp body towards the first end portion of the clamp body.
  • the actuator may be of any suitable form and employ any suitable
  • the actuator of the present invention comprises an eccentric body, in particular which forms a cam.
  • the eccentric body has an outer surface that bears directly or indirectly on the second end portion of the clamp body.
  • the eccentric body is rotatable on an axis which is normal to the central longitudinal axis of the connecting member.
  • the eccentric body is rotatable about a fastening member attached to the first end portion of the connecting member.
  • the eccentric body may be formed to have an outer surface which is nonuniform with respect to its central axis of rotation.
  • the eccentric body has an outer surface which is substantially uniform but wherein the axis of rotation of the eccentric body is offset from its centre.
  • the outer surface of the eccentric body has a radius from the axis of rotation of the body which ranges between a minimum radius and a maximum radius.
  • Rotation of the eccentric body causes the outer surface bearing on the second end portion of the clamp body to move between those portions of the surface having the minimum and maximum radii.
  • rotation of the eccentric body about its axis of rotation causes the outer surface bearing against the second end portion of the clamp body to move from that portion of the surface having the minimum radius to that portion having the maximum radius.
  • This action urges the second end portion of the clamp body towards the first end portion thereof, that is into the closed position, and the connecting member towards the second end portion of the clamp body.
  • the eccentric body Reversing the movement of the eccentric body releases the second end portion of the clamp body, which is allowed to return to the open position, for example under an inherent resilience of the clamp body.
  • the resilient mount yields and allows the second end of the connecting member to move towards and relative to the second end portion of the clamp body. This prevents further closure of the clamp body and the application of excessive compressive forces on the pole. Rather, the excess compressive force is being accommodated by the resilience of the resilient mount.
  • the eccentric body may be of any suitable size to apply the required compressive force to the pole.
  • the eccentric body of the clamp of the present invention has an outer surface with a maximum radius that is greater than that of the bodies of the known clamps.
  • the ratio of the minimum radius of the outer surface of the eccentric body to the maximum radius is selected to suit the dimensions of the range of pole sizes to be clamped and the dimensions of the clamp body.
  • the ratio between the minimum and maximum radii is from 1 :1 .5 to 1 :3.5. More preferably, the ratio between the minimum and maximum radii is from 1 : 2 to 1 :3. Yet still more preferably, the ratio between the minimum and maximum radii is from 1 : 2.5 to 1 : 3.
  • the form of the actuator for example the form of the rotatable eccentric body, is selected to allow the clamp assembly to clamp poles of the desired size.
  • the excess compressive force that may be applied to larger diameter poles is accommodated by the resilient mount.
  • the resilience of the resilient mount is selected to correspond to the forces applied by the actuator.
  • the resilience of the resilient mount may be indicated in terms of a spring rate.
  • the spring rate is in the range of from 100 to 200 N/mm, more preferably from 125 to 180 N/mm, still more preferably from 150 to 175 N/mm.
  • the eccentric body may be formed from any suitable material or combination of materials, preferably a material resistant to wear. More preferably however, the eccentric body is formed from a combination of glass-fibre reinforced nylon. Any suitable means for moving the actuator, for example rotating the eccentric body, may be used.
  • the means for moving the actuator is a lever.
  • the lever is pivotably attached to a portion of the eccentric body. It is preferred that the lever is formed integrally with the eccentric body. However, the lever may be formed separately from the eccentric body and be connected thereto. In use, movement of the lever causes the actuator to move, for example the eccentric body to rotate and its surface to bear on the second end portion of the clamp body.
  • the lever may be formed from any suitable material or combination of materials, preferably a material resistant to wear. More preferably however, the lever is formed from a fibre reinforced polymer, for example glass-fibre reinforced nylon.
  • the outer surface of the eccentric body may bear directly onto the second end portion of the clamp body.
  • the outer surface of the eccentric body of the actuator also bears directly on the resilient mount, in particular the resilient member.
  • a shim is disposed between the eccentric body of the actuator and the resilient mount. In this way, wear of the surface of the eccentric body is reduced.
  • the outer surface of the eccentric body of the actuator bears against the shim, disposed between the eccentric body and both the second end portion of the clamp body and the resilient mount.
  • the shim is replaceable and acts to protect the second end portion of the clamp from any wear.
  • the shim may be formed from any suitable material or combination of materials.
  • the shim is made from a material having a low coefficient of friction.
  • Suitable materials include polymers and rubber compounds. It is preferred that the shim is formed from a material that is less hard than the material of the actuator, such that any wear occurring arises in the shim. In a particularly preferred embodiment, the shim is made from a homopolymer acetyal resin, also known under the trade name DELRINTM.
  • the shim may be of any suitable shape.
  • the shim is shaped so as to have a surface complimenting the outer surface of the actuator which bears against it.
  • the shim is preferably shaped so as to accommodate a portion of the resilient mount, more preferably a portion of the resilient member.
  • the shim has a recess for receiving an end portion of the resilient member.
  • Figure 1 is a cross sectional view of a clamp assembly according to a preferred embodiment of the present invention in the open position;
  • Figure 2 is an enlarged cross sectional view of a portion of the clamp assembly of Figure 1 ;
  • Figure 3 is a cross sectional view of the clamp assembly of Figure 1 in the closed position
  • Figure 4 is a cross sectional view of the clamp assembly of Figure 1 in the closed position, wherein the pole is of a larger outer diameter than in Figures 1 and 3.
  • FIG. 1 With reference to Figure 1 , there is shown a quick release clamp assembly according to one embodiment of the present invention, generally indicated as 2.
  • the clamp assembly 2 is shown in the open position.
  • the clamp assembly 2 In the open position, the clamp assembly 2 fits loosely around the outer surface 4 of a pole 6, typically leaving a space 8 between the clamp assembly 2 and the outer surface 4 of the pole 6. In use, the clamp assembly 2 may be adjusted to move between the open position and a closed position, described in more detail below with reference to Figure 2, in which the clamp assembly is secured by clamping to the pole 6. It will be appreciated that the pole 6 may be replaced by any generally cylindrical body that is required to be clamped.
  • the clamp assembly 2 comprises a clamp body 10 formed from glass-fibre reinforced nylon. As shown in Figure 1 , the clamp body 10 is generally circular and ring-like in shape, so as to enable it to contact and engage with the outer surface 4 of the pole 6 and apply a radially compressive force thereto.
  • the clamp body 10 extends around part but not all of the outer surface 4 of the pole 6.
  • the clamp body 10 comprises a first end portion 12 and a second end portion 14 separated in the open position shown in Figure 1 by a first distance 16.
  • first end portion 12 and second end portion 14 project outwardly from the clamp body 10 and oppose each other. Further, as shown in more detail in Figure 2, the first end portion 12 and second end portion 14 each comprise a bore 18a, 18b extending therethrough and are positioned such that the bores 18a, 18b are generally aligned with one another.
  • the clamp assembly 2 further comprises a connecting member in the form of a bolt 20.
  • the bolt 20 extends between and through the bores 18a, 18b of the first end portion 12 and second end portion 14 of the clamp body 10 and is free to move therethrough relative to the first and second end portions.
  • the bolt 20 comprises a first end portion 22 and a second end portion 24.
  • the first end portion 22 of the bolt 20 is adjacent the second end portion 14 of the clamp body 10 and is connected to the actuator 26, described hereinafter.
  • the first end portion 22 of the bolt 20 is threaded. In this way, the effective length of the bolt 20 is able to be adjusted, as described below.
  • the effective length of the bolt 20 is the distance between the head 42 of the second end portion of the bolt 20 and the outer surface 32 of the actuator, described below. Adjustment of the effective length of the bolt 20 varies the distance between the first end portion 12 and second end portion 14 of the clamp body 10 and the amount of compressive force applied by the clamping assembly 2 in operation.
  • the clamp assembly 2 further comprises an actuator, generally indicated as 26, formed from glass-fibre reinforced nylon.
  • the actuator 26 comprises an eccentric body in the form of a cam 30.
  • the cam 30 has an outer surface 32 which bears on the second end portion 14 of the clamp body 10.
  • the outer surface 32 of the cam 30 is shown to bear indirectly on the second end portion 14 of the clamp body 1 0, by way of a shim 34.
  • the outer surface 32 of the cam 30 can bear directly on the second end portion 14 of the clamp body 1 0. In this arrangement however, the clamp assembly is more prone to wear.
  • the cam 30 has an axis of rotation A which is offset from its centre and has an outer surface 32 that is eccentric with respect to the axis of rotation A.
  • the cam 30 is rotatable about the axis A, which is normal to the central longitudinal axis of the bolt 20.
  • the cam 30 is provided with a generally cylindrical fastening member 36 arranged uniformly about the axis of rotation and about which the cam 30 rotates.
  • the fastening member 36 threadably receives the first end portion 22 of the bolt 20. The effective length of the bolt 20 is adjusted by rotating the bolt relative to the fastening member 36.
  • the outer surface 32 of the cam 30 has a radius from the axis of rotation A which ranges between a first, lower radius R and a second, larger radius R 2 .
  • the ratio of the first radius R of the outer surface 32 of the cam 30 to the second radius R 2 is selected to suit the dimensions of the range of pole sizes to be clamped and the dimensions of the clamp body 1 0.
  • the ratio of the second radius R 2 to the first radius Ri shown in Figure 1 is 2.76:1 .
  • the outer surface 32 of the cam 30 with the first radius Ri bears on the second end portion 14 of the clamp body 1 0.
  • the ratio of the second radius R 2 to the first radius Ri may be significantly greater than similar clamps of known design. This allows the clamp assembly of the present invention to be applied to a greater range of pole sizes, for example allowing the assembly to accommodate wear in the pole as a result of use.
  • the actuator 26 further comprises a lever 40, which is attached to and extends outwards from the cam 30. Movement of the lever 40 rotates the cam 30 and moves the clamp assembly 2 between the open and closed positions.
  • the first end portion 22 of the bolt 20 is adjacent the second end portion 14 of the clamp body 10. The first end portion 22 of the bolt 20 extends through the bore 18b in the second end portion 14 of the clamp body 10.. The first end portion 22 of the bolt 20 is spaced from the second end portion
  • the coiled spring 48 is disposed between the second end portion 14 of the clamp body 10 and the cam 30.
  • the coiled spring 48 limits relative movement between the first end portion 22 of the bolt 20 and the second end portion 14 of the clamp body 10. In this way, relative movement between the bolt 20 and the second end portion 14 of the clamp body 10is possible only by compression of the coiled spring 48.
  • the coiled spring 48 is located within the flared portion 19 of the bore 18a extending through the first end portion 12 of the clamp body 10, being seated on a shoulder 50 formed therein.
  • the dimensions and properties of the coiled spring 48 are selected to correspond to the size of the actuator 26 and the forces applied thereby, in turn determined by the intended use of the clamp.
  • An exemplary coiled spring 48 has the following characteristics:
  • Figure 3 shows the quick release clamp assembly of Figure 1 in the closed position.
  • the dimensions of the outer surface 4 of the pole 6 to be clamped are the same.
  • the clamp assembly 2 is applied to the outer surface 4 of a pole 6 in the open position with the first end portion 12 and second end portion 14 separated by the first distance 16.
  • the clamp assembly 2 is then operated by rotating the lever 40 in the direction of arrow L in Figure 1 , in turn rotating the cam 30, to bring the portion with the second radius R 2 to bear on the second end portion 14, urging the first end portion 12 and second end portion 14 towards each other and into the closed position.
  • the first and second end portions 12, 14 of the clamp body 10 are separated by a second distance 16', less than the first distance 16.
  • FIG. 4 With reference to Figure 4 there is shown the clamp assembly 2 in the closed position around a pole of larger outer diameter than in Figures 1 and 3. As can be seen, to accommodate the larger diameter of the pole, distance 16" is greater than distance 16' and there is no gap between the shim 34 and the second end portion 14 of the clamp body 10.
  • the clamp assembly 2 of the present invention is capable of clamping poles of reduced diameters, particularly due to wearing of the pole through use. This is achieved by employing a cam 30 having a second radius R 2 which is greater than that of the bodies of the known clamps. In this way the maximum amount of compressive force that can be applied is increased enabling the clamp assembly to grip poles having smaller outer diameters. Notwithstanding the larger cam 30, the clamp assembly 2 of the present invention is capable of accommodating poles having larger outer diameters, without requiring manual adjustment. This is in contrast to known clamps of similar design.
  • the clamp assembly 2 comprises a coiled spring 48 disposed between the first end portion 22 of the bolt 20 and the second end portion 14 of the clamp body 10. As shown, the coiled spring 48 is located within the flared portion 19 of the bore 18a extending through the second end portion 14 of the clamp body 10, being seated on the shoulder 50 formed therein.
  • the properties of the coiled spring 48 in particular its resilience, are selected to correspond to the size of pole to be clamped, the dimensions of the actuator 26 and the forces to be applied thereby.
  • the coiled spring 48 yields by compressing and allows the first end portion 22 of the bolt 20 to move towards the second end portion 14 of the clamp body 10. This prevents further closure of the clamp body and the application of excessive compressive forces on the pole. Rather, the excess compressive force is being accommodated by the resilience of the coiled spring 48, in particular by the spring 48 being compressed.
  • the clamp assembly 2 of Figure 1 comprises a shim 34 disposed between the second end portion 14 of the clamp body 10 and the cam 30.
  • the outer surface of the cam 30 bears on the shim 34.
  • wear occurring through use of the clamp is confined to the shim 34, which is replaceable.
  • the shim 34 is provided with a recess 34a in its surface opposing the second end portion 14 of the clamp body 10. As shown in the figures, the recess 34a
  • the surface of the shim 34 opposing the cam 30 is arcuate.

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  • General Engineering & Computer Science (AREA)
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  • Clamps And Clips (AREA)

Abstract

La présente invention concerne un ensemble de serrage (2) à libération rapide comprenant un corps de serrage (10) permettant d'appliquer une force de compression radiale à la surface extérieure (4) d'un pôle (6), le corps de serrage comprenant une première partie d'extrémité (12) et une seconde partie d'extrémité (14) ; un élément de raccordement (20) s'étendant entre les première et seconde parties d'extrémité du corps de serrage, l'élément de raccordement présentant une première partie d'extrémité (22) et une seconde partie d'extrémité (24) ; un actionneur (26) raccordé à la première extrémité de l'élément de raccordement, en utilisation lors de la fermeture de l'élément de serrage, l'actionneur déplaçant la seconde partie d'extrémité du corps de serrage vers la première partie d'extrémité du corps de serrage et par rapport à l'élément de raccordement ; la première partie d'extrémité de l'élément de raccordement étant raccordée à la seconde partie d'extrémité du corps de serrage par un support élastique, ledit support élastique s'opposant à l'action de l'actionneur lors de la fermeture de l'élément de serrage et permettant un mouvement relatif entre la première partie d'extrémité de l'élément de raccordement et la seconde partie d'extrémité du corps de serrage. L'ensemble de serrage peut s'avérer utile, par exemple, dans des ensembles de barres télescopiques.
PCT/GB2015/052411 2014-09-05 2015-08-19 Ensemble de serrage WO2016034847A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1415769.7 2014-09-05
GB1415769.7A GB2529880B (en) 2014-09-05 2014-09-05 A clamp assembly

Publications (1)

Publication Number Publication Date
WO2016034847A1 true WO2016034847A1 (fr) 2016-03-10

Family

ID=51796284

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2015/052411 WO2016034847A1 (fr) 2014-09-05 2015-08-19 Ensemble de serrage

Country Status (2)

Country Link
GB (1) GB2529880B (fr)
WO (1) WO2016034847A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108302103A (zh) * 2018-01-24 2018-07-20 北京理工大学 快拆固定夹及包含其的连接件
CN112414378A (zh) * 2019-08-22 2021-02-26 南京德朔实业有限公司 一种投线仪固定装置
CN114934711A (zh) * 2022-05-26 2022-08-23 国网山东省电力公司郓城县供电公司 一种电力横担
CN115182913A (zh) * 2022-07-05 2022-10-14 苏广伟 一种伸缩杆的卡紧装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3243963B1 (fr) * 2016-05-10 2018-07-04 BAUER Deep Drilling GmbH Systeme et procede de liaison d'un verin hydraulique
GB2560526B (en) * 2017-03-13 2019-12-11 Ionic Systems Ltd A clamp for clamping telescopic pole members
GB2565148B (en) * 2017-08-04 2020-02-05 Ex Ceed Innovation Ltd Water-fed pole for window cleaning
CN107314008B (zh) * 2017-08-08 2023-03-17 江南工业集团有限公司 一种平面凸轮联动锁紧机构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3305234A (en) * 1964-12-22 1967-02-21 Newman Dukes & Cline Inc Weight securing means on a bar bell assembly
US20050049720A1 (en) * 2003-08-28 2005-03-03 Benson Richard Myrle Quick-release tube clamp for modular lower limb prosthetic systems and method therefor
WO2010085905A1 (fr) * 2009-01-29 2010-08-05 Lekisport Ag Bâton réglable en longueur et dispositif de serrage pour celui-ci

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2512390B (en) * 2013-03-28 2016-09-14 Gardiner Pole Systems Ltd A clamp assembly

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3305234A (en) * 1964-12-22 1967-02-21 Newman Dukes & Cline Inc Weight securing means on a bar bell assembly
US20050049720A1 (en) * 2003-08-28 2005-03-03 Benson Richard Myrle Quick-release tube clamp for modular lower limb prosthetic systems and method therefor
WO2010085905A1 (fr) * 2009-01-29 2010-08-05 Lekisport Ag Bâton réglable en longueur et dispositif de serrage pour celui-ci

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108302103A (zh) * 2018-01-24 2018-07-20 北京理工大学 快拆固定夹及包含其的连接件
CN112414378A (zh) * 2019-08-22 2021-02-26 南京德朔实业有限公司 一种投线仪固定装置
CN112414378B (zh) * 2019-08-22 2023-02-28 南京泉峰科技有限公司 一种投线仪固定装置
CN114934711A (zh) * 2022-05-26 2022-08-23 国网山东省电力公司郓城县供电公司 一种电力横担
CN114934711B (zh) * 2022-05-26 2023-06-23 国网山东省电力公司郓城县供电公司 一种电力横担
CN115182913A (zh) * 2022-07-05 2022-10-14 苏广伟 一种伸缩杆的卡紧装置

Also Published As

Publication number Publication date
GB201415769D0 (en) 2014-10-22
GB2529880A (en) 2016-03-09
GB2529880B (en) 2016-11-02

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