Mount assembly for engineering services

Abstract

The present disclosure relates to a mount assembly for engineering services such as air handling units (AHU) of a heating, ventilating, and air-conditioning (HVAC) systems. In one form, the mount assembly comprises a an aperture comprising a female screw thread, and a resilient element comprising an item attachment point and a male screw thread adapted for threadable engagement with the female thread of the base so that the resilient element interposes the item attachment point and the-base.

Claims

1. A mount assembly for an engineering services item, the mount assembly comprising: a base comprising a body of rigid material having an aperture comprising an internal screw thread and a collar encircling the aperture, wherein at least a portion of the collar contains the internal screw thread; and a resilient element comprising: a body of resilient material; an item attachment point comprising an attachment member, at least a portion of which is embedded in the body of resilient material; and an external screw thread formed into the body of resilient material and configured for threadable engagement with the internal screw thread of the base, such that the resilient element is screwed into the base and interposes the item attachment point and the base.

2. The mount assembly of claim 1, wherein the resilient element comprises a solid portion of the resilient material.

3. The mount assembly of claim 1, further comprising a carriage depending from the base and adapted to slide with respect to a support rail.

4. The mount assembly of claim 3, wherein the carriage is adapted to slidably engage the support rail.

5. The mount assembly of claim 3, wherein the carriage comprises a solid portion of a resilient material.

6. The mount assembly of claim 1, wherein the resilient material comprises an elastomeric material.

7. The mount assembly of claim 3, wherein the carriage is formed by a molding process.

8. The mount assembly of claim 7, wherein the carriage is molded to the base during the molding process of the carriage.

9. The mount assembly of claim 1, wherein the resilient element is formed by a molding process.

10. The mount assembly of claim 9, wherein the attachment member is molded into the resilient element during the molding process of the resilient element.

11. The mount assembly of claim 1, wherein the attachment member comprises a nut for a fastener.

12. The mount assembly of claim 1, wherein the attachment member comprises a bolt having a head embedded in the resilient element.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) Embodiments of the present invention will be discussed with reference to the accompanying drawings wherein:

(2) FIG. 1 is an isometric view of a mounting assembly according to a first embodiment of the invention;

(3) FIG. 2 is a side view of the mounting assembly of FIG. 1;

(4) FIG. 3 is a cross-sectional view through the mounting assembly of FIGS. 1 and 2;

(5) FIG. 4 is an isometric cross-sectional view through the mounting assembly of FIGS. 1 through 3;

(6) FIG. 5 is an isometric cross-sectional view through a base from the mounting assembly of FIGS. 1 through 4;

(7) FIG. 6 is an isometric view of a resilient element from the mounting assembly of FIGS. 1 through 5;

(8) FIG. 7 is an isometric view of a mounting assembly according to a second embodiment of the invention;

(9) FIG. 8 is an end view of the mounting assembly of FIG. 7;

(10) FIG. 9 is a cross-sectional end view of the mounting assembly of FIGS. 7 and 8;

(11) FIG. 10 is an isometric view of a mount from the mounting assembly of FIGS. 7 through 9;

(12) FIG. 11 is a cross-sectional view taken through the mount of FIG. 10;

(13) FIG. 12 is an isometric view of a mounting assembly according to a third embodiment, taken from an upper viewpoint;

(14) FIG. 13 is an isometric view of the mounting assembly of FIG. 12, taken from a lower viewpoint;

(15) FIG. 14 is a cross-sectional view through a rod and a carriage from the mounting assembly of FIGS. 12 and 13; and

(16) FIG. 15 is a cross-sectional view through the rod and a captive assembly from the mounting assembly of FIGS. 12 through 14, where the carriage has been removed to permit visibility of the captive assembly.

(17) In the following description, like reference characters designate like or corresponding parts throughout the figures.

DESCRIPTION OF EMBODIMENTS

(18) Referring now to FIGS. 1 through 6, there is shown a mount assembly 1 for an engineering services item, such as an AHU of an HVAC system.

(19) The mount assembly 1 comprises a base 2, an item attachment point 4 for the item (i.e. the AHU), and a resilient element 6 interposing the base 2 and the item attachment point 4, from which resilient element 6 the item attachment point 4 depends.

(20) The base 2 comprises a body 8 of a rigid material such as a metal or a rigid plastic material, the base body 8 comprising a collar 10 with an internal (or female) screw thread 14 (see FIGS. 3 and 4) encircling an aperture (a circular bore) 12, and a flange 16 which encircles the collar 10. The flange 16 comprises a plurality of bolt holes 18, via which, in use, the base body 8 can be bolted to a ground/floor surface or a plinth. A rubber seal 19 (optional depending on the application) can be placed beneath the flange 16.

(21) The resilient element 6 comprises a solid body 20 of a resilient, elastomeric material such as rubber, a synthetic rubber or a thermoplastic vulcanisate. With reference to FIG. 6, it can be seen that the solid body 20 comprises a cylindrical portion comprising an external (male) screw thread 22, where both the cylindrical portion and the external screw thread 22 are adapted or threadable engagement with (i.e. to screw into) the internal thread 14 of the collar 10.

(22) Because they are moulded into the body 20, the screw threads 22 are coarse threads, with some clearance provided between the male and female threads 22 and 14 respectively.

(23) With reference to FIGS. 3 and 4, it can be seen that the item attachment point 4 comprises an item attachment member 24 in the form of, in this embodiment, a nut 24 for a fastener embedded in the solid body 20 of resilient element 6, and thus held captive by the resilient element 6. A bore 26 extends through the resilient element 6 to receive with, a clearance fit, a shank of a bolt 28 when this is threaded into the nut 24. Using a captive nut 24 as opposed to a captive bolt allows the bolt length to be selected to accommodate different air conditioning units.

(24) A conventional outdoor unit of a split cycle air conditioner (one example of an AHU) comprises au elongate body provided with four feet, which are arranged into two pairs positioned at or towards opposing ends of the unit.

(25) In use the flange 16 of the base 2 is bolted to one of a ground/floor/frame and a shank of a mounting bolt 28 is passed through a hole provided in each of the feet, and that bolt 28 is then screwed into the captive nut 24 of the resilient element 6.

(26) The extent to which the resilient element 6 is screwed into the collar 10 can be selected as necessary to assist in levelling the outdoor unit. Optionally, a pair of opposing flat surfaces could be created on the resilient element 6 to facilitate its rotation with a spanner or wrench. In this way, each mount assembly 1 comprises a means for adjusting a height of a support level for the AHU.

(27) In addition to facilitating height adjustment, the rigid collar 10 encircles and provides lateral support for the resilient element 6, and thus supports the resilient element 6 against premature failure of due to sideways loads of the type created in an earthquake, while not diminishing the vibration dampening of the resilient element 6.

(28) In the event of seismic activity causing vibration of the ground and the base 2 in turn, the resilient element 6 will elastically deform without failing, while absorbing at least some of this vibration, so that not all is transmitted to the attachment point 4, and the AHU in turn. In this way, the likelihood of the AHU breaking free of its mounts and being damaged, or possibly even injuring others, is decreased. Moreover, during normal use, the resilient element 6 will absorb noise and vibration created by the rotating components of the AHU, such as a motor and a fan, and reduce transmission of these vibrations to the base 2.

(29) Referring now to FIGS. 7 through 11, where there is shown a mount assembly 100 according to a further embodiment of the present invention. Those parts of the mount assembly 100 which are identical (or near-identical) to corresponding parts shown in the mount assembly 1 of FIGS. 1 through 6, will be denoted by the same reference numerals and will not be described again in detail.

(30) With reference to FIGS. 9 and 11, it can be seen that the item attachment point 4 of mount assembly 100 comprises an item attachment point 4 in the form of a bolt 102 embedded head first (i.e. with its shank directed outward) in the resilient element 6, and thus held captive by the resilient element 6. A washer 103 is welded to the head of the bolt 102 to aid in resisting rotation.

(31) It should be understood however, that the item attachment point 4 of mount assembly 100 may be the same as that of mount assembly 1 (described above), and vice versa.

(32) The base 2 is secured with respect to a carriage 110, which is adapted for a sliding engagement with a support rail 120. This securement may be by way of any suitable method, including adhesive, co-moulding or fasteners.

(33) The carriage 110 comprises a generally cuboid solid body 112 of resilient material such as rubber or a thermoplastic vulcanisate, comprising a pair of sides 114, a pair of ends 116, a top surface, and a bottom surface. Each side 114 of the body comprises a guide slot 118 which extends between the ends 116.

(34) The support rail 120 comprises a channel 122 comprising a slot 124, and a substantially constant cross-sectional shape throughout its length. This cross-sectional shape comprises a floor 126, a pair of opposing sides 128, and an inwardly directed and downwardly curled lip 130 depending from each of the opposing sides 128. There are a plurality of through apertures 132 (slots in this embodiment) in the floor of the support rail. These apertures 132 permit drainage of any water that might be caught in the channel.

(35) The guide slots 118 create a neck portion N for the carriage 110, which sits between a head portion H and a tail portion T of the carriage 110.

(36) In use, the mount assembly 100 slidably engages the support rail 120. In doing so, the lips 130 of the support rail 120 locate in the guide slots 118, which undercut the tail portion T so that this (i.e. the tail portion) becomes captured by the support rail 120, while the head portion H of the carriage sits proud of the support rail 2.

(37) So it is that the mount assembly 100 is slidably retained by the support rail 120, and in this way its position along the support rail 120 can be quickly and easily adjusted as required. As was the case with the embodiment of FIGS. 1 through 6, the extent to which the resilient element 6 is screwed into the collar 10 can be selected as necessary to assist in levelling the outdoor unit. In this way, each mount assembly 100 comprises a means for adjusting a height of a support level for the AHU.

(38) In use, support rail 120 is secured (e.g. bolted or welded) to one of a ground/floor/frame, and the carriage 110 is slidably retained by the support rail 120. The position of the mount assembly 100 along the support rail 120 can then be quickly and easily adjusted as required, and the AHU secured to the bolt 102.

(39) In the event of seismic activity causing vibration of the ground and the support rail 120 in turn, both the resilient element 6 and the carriage 110 will elastically deform without failing, while absorbing at least some of this vibration, so that not all is transmitted to the attachment point 102, and the AHU. In this way, the likelihood of the AHU breaking free of its mounts and being damaged, or possibly even injuring others, is decreased. Moreover, during normal use, both the resilient element 6 and the carriage 110 will absorb noise and vibration created by the rotating components of the AHU, such as a motor and a fan, and reduce transmission of these vibrations to the support rail 120.

(40) Referring now to FIGS. 12 through 14, where there is shown a mount assembly 200 according to a further embodiment of the present invention. Those parts of the mount assembly 200 which are identical (or near-identical) to corresponding parts shown in the mount assembly 100 of FIGS. 7 through 11, will be denoted by the same reference numerals and will not be described again in detail.

(41) The item attachment point 4 of mount assembly 200 comprises a captive assembly 202 embedded in the carriage 110, and thus held captive by the carriage 110. The captive assembly 202 comprises a threaded bush 202a, and a washer 202b welded to the threaded bush 202a. Carriage 110 comprises a though bore 204 which is aligned with a threaded bore in the threaded bush 202a so that a threaded rod 206 can be threaded into the threaded bush 202a and passed through the carriage 110 via the bore 204. The position of the threaded rod 206 is fixed by a securing nut 208 and washer 210.

(42) In use, support rail 120 is mounted in a suspended position and the mount assembly 200 slidably engages the support rail 120, with the threaded rod 206 extending down from the carriage 110 and through one of the apertures 132 in the support rail 120. In this way, an engineering services item such as, for example, a fan coil unit or a cassette unit of an HVAC system, can be suspended from the threaded rod.

(43) Because the carriage 110 comprises a generally cuboid solid body 112 of resilient material interposing the threaded rod 206 and the support rail 120, mount assembly 200 can absorb violent shock loads associated with seismic activity such as an earthquake, without failing and dropping the suspended load onto people below.

(44) Although the foregoing description describes use of the mount assembly as a mount for an outdoor unit of an air-conditioning system, its application is not so limited. For example, the base could be used for pumps, motors or other appliances that require anti vibration and support levelling, hence the use of the term engineering services.

(45) Throughout the specification and the claims that follow, unless the context requires otherwise, the words comprise and include and variations such as comprising and including will be understood to imply the inclusion of a stated integer or group of integers, but not the exclusion of any other integer or group of integers.

(46) The reference to any prior art in this specification is not, and should not be taken as, an acknowledgement of any form of suggestion that such prior art forms part of the common general knowledge.

(47) It will be appreciated by those skilled in the art that the invention is not restricted in its use to the particular application described. Neither is the present invention restricted in its preferred embodiment with regard to the particular elements and/or features described or depicted herein. It will be appreciated that the invention is not limited to the embodiment or embodiments disclosed, but is capable of numerous rearrangements, modifications and substitutions without departing from the scope of the invention as set forth and defined by the following claims.