GB2137302A - Overload mechanism - Google Patents
Overload mechanism Download PDFInfo
- Publication number
- GB2137302A GB2137302A GB08308226A GB8308226A GB2137302A GB 2137302 A GB2137302 A GB 2137302A GB 08308226 A GB08308226 A GB 08308226A GB 8308226 A GB8308226 A GB 8308226A GB 2137302 A GB2137302 A GB 2137302A
- Authority
- GB
- United Kingdom
- Prior art keywords
- conrod
- protection mechanism
- overload protection
- crank
- mechanism according
- 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.)
- Withdrawn
Links
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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/04—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads with elastic intermediate part of fluid cushion
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
Abstract
An overload protection mechanism for a transmission system comprising a crank (2) and a conrod (4) wherein the conrod includes two relatively slidable contiguously arranged parts (8, 10) which can be slid apart to extend the length of the conrod (4) and biasing means (12) effective to provide a biasing force tending to hold the parts (8, 10) together and against which the crank (2) is constrained to act under overload conditions to extend the length of the conrod, whereby under overload conditions crank rotation is not prevented. <IMAGE>
Description
SPECIFICATION
Overload mechanism
This invention relates to overload mechanisms and more especially it relates to such mechanisms which serve to protect crank and conrod transmission systems.
Crank and conrod transmission systems are very well known in themselves and they serve to transpose rotary motion to linear motion, the crank being pivotally secured to one end of the conrod which rotates with the crank and the other end of the conrod being supported to permit reciprocating linear motion with a stroke which corresponds to twice the effective length of the crank.
If the operating load applied to the conrod becomes excessive, damage may be done to the transmission system and/or to a motor which drives it and which is normally coupled to the crank.
It is an object of the present invention to provide a crank and conrod transmission systen which incorporates a protection mechanism whereby overload conditions can be tolerated.
According to the present invention an overload protection mechanism for a transmission system comprises a crank and a conrod wherein the conrod includes two relatively slidable contiguously arranged parts which can be slid apart to extend the length of the conrod and biasing means effective to provide a biasing force tending to hold the parts together and against which the crank is constrained to act under overload conditions to extend the length of the conrod, whereby under overload conditions crank rotation is not prevented.
The two parts may comprise a slide tube and a slide rod which is telescopically mounted to slide within the slide tube.
The slide tube may be connected to a further rod which defines one end of the conrod and the slide rod may define the other end of the conrod.
The ends of the conrod may be cranked.
The biasing means may comprise a coil spring.
The coil spring may be arranged to embrace the slide tube and may be secured at each end to respective ends of the conrod.
The crank may comprise at one end a journal within which the conrod is mounted and at the other end means to receive in driving engagement a motor shaft.
The mechanism may form a part of apparatus which embodies an electric motor which includes the motor shaft.
The apparatus may be a part of a vending machine.
The vending machine may be primarily designed for drinks and the conrod may be operable for cup delivery purposes.
Thus it will be appreciated that if in this later case a cup jams the conrod, the drive motor will be protected by the mechanism against overload.
One embodiment of the invention will now be described solely by way of example with reference to the accompanying drawings in which:
Figure 1 is a side view of an overload protection mechanism associated with a conrod and crank showing the crank in one position;
Figure 2 is a side view of the mechanism shown in Fig. 1 with the crank in a different position;
Figure 3 is one end view of the mechanism as shown in Fig. 2;
Figure 4 is another end view of the mechanism as shown in Fig. 2; and
Figure 5 is a plan view of the mechanism shown in Figs. 1, 2, 3 and 4.
Referring now to the drawings, wherein corresponding parts of the various Figures bear as appropriate the same numerical designation, a crank and conrod mechanism comprises a crank 2 and a conrod 4, the conrod being defined by a fixed link 6 which is secured within a slide tube 8 and a slide link 10 which is slidable within the tube 8. The tube 8 is embraced by a coil spring 1 2 one end 1 4 of which is anchored in the slide tube 8 and arranged to pass through the fixed link 6 so as to secure the fixed link 6 to be slide tube 8. The other end 1 6 of the coil spring is secured to the slide link 1 0. The fixed link 6 includes a cranked arm 1 8 which is journaled in one end of the crank 2 and held in position by circlips 20.A motor shaft 22 is coupled towards that end of the crank 2 which is remote from the bush arm 18. The motor shaft 22 is recieved within a hole formed in the crank 2 and is rigidly secured by means of a set screw 24.
As the motor shaft 22 is constrained to rotate due to operation of a motor (not shown) the crank 2 will rotate correspondingly in a direction indicated by the arrow 26. As the crank rotates, the conrod 4 will be caused to reciprocate in directions as indicated by the arrow 28 and a sliding linear motion will normally be produced with a stroke corresponding to twice the effective length L, as shown in Fig. 5, of the crank 2.
In the event that the conrod 4 becomes jammed, the sliding link 10 will withdraw from the slide tube 8 against the spring 1 2 so that the effective length of the conrod 4 is extended whereby continued rotation of the crank 2 in response to rotation of the motor shaft 22 is permitted.
The mechanism may form a part of a vend ing machine wherein the conrod serves to effect a delivery operation, for example of a drinking cup. Thus it will be appreciated that if the conrod becomes jammed by a cup or other article to be delivered, a motor driving it can continue to rotate together with the crank
2 whereby overload protection is provided.
The vending machines may be such as those designed for vending drinks. It is to be understood however that the invention may be applied to any crank and conrod arrange
ment wherein overload protection is required.
For example it may be employed in photograph, cigarette or confectionary vending machines which use such an arrangement.
Claims (11)
1. An overload protection mechanism for a transmission system comprising a crank and a conrod wherein the conrod includes two relatively slidable contiguously arranged parts which can be slid apart to extend the length of the conrod and biasing means effective to provide a biasing force tending to hold the parts together and against which the crank is constrained to act under overload conditions to extend the length of the con rod, whereby under overload conditions crank rotation is not prevented.
2. An overload protection mechanism according to claim 1 in which the two parts comprise a slide tube and a slide rod which is telescopically mounted to slide within the slide tube.
3. An overload protection mechanism according to claim 2 in which the slide tube is connected to a further rod which defines one end of the conrod and the slide rod defines the other end of the conrod.
4. An overload protection mechanism according to claim 3 in which the ends of the conrod are cranked.
5. An overload protection mechanism according to claim 4 in which the biasing means comprises a coil spring.
6. An overload protection mechanism according to claim 5 in which the coil spring is arranged to embrace the slide tube and is secured at each end to respective ends of the conrod.
7. An overload protection mechanism according to any one of the preceding claims in which the crank comprises at one end a journal within which the conrod is mounted and at the other end means to receive in driving engagement a motor shaft.
8. An overload protection mechanism substantially as herein described with reference to the accompanying drawings.
9. Apparatus comprising an overload protection mechanism as claimed in any one of the preceding claims and an electric motor which includes the motor shaft.
10. A vending machine including apparatus as claimed in claim 9.
11. A vending machine according to claim 10 which is designed for drinks, the conrod being operable for cup delivery purposes.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08308226A GB2137302A (en) | 1983-03-25 | 1983-03-25 | Overload mechanism |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08308226A GB2137302A (en) | 1983-03-25 | 1983-03-25 | Overload mechanism |
Publications (2)
Publication Number | Publication Date |
---|---|
GB8308226D0 GB8308226D0 (en) | 1983-05-05 |
GB2137302A true GB2137302A (en) | 1984-10-03 |
Family
ID=10540195
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08308226A Withdrawn GB2137302A (en) | 1983-03-25 | 1983-03-25 | Overload mechanism |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2137302A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1065487A2 (en) * | 1999-06-29 | 2001-01-03 | Kavlico Corporation | Redundant linkage and sensor assembly |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110887656B (en) * | 2019-12-25 | 2024-07-12 | 昆山孚思格机电科技有限公司 | Chain type force measuring sorting machine reference end extension driving and overload protecting device |
Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB380941A (en) * | 1931-04-23 | 1932-09-29 | Eugen Assar Alexis Gronwall | Improvements in or relating to methods for the production of hard alloys |
GB675449A (en) * | 1949-08-23 | 1952-07-09 | Dentatus Ab | Improvements in and relating to power-driven reciprocatory hand tools |
GB886430A (en) * | 1957-07-20 | 1962-01-10 | Bosch Gmbh Robert | Improvements in and relating to windscreen wipers for motor vehicles |
GB1024375A (en) * | 1963-03-27 | 1966-03-30 | Charles Rodney Dyson | A conveyor including an overload prevention device |
GB1049469A (en) * | 1964-09-24 | 1966-11-30 | Irvin Hudson Ltd | Improvements in or relating to rod devices for transmitting to-and-fro-motion |
GB1070084A (en) * | 1965-02-09 | 1967-05-24 | G D Peters & Co Engineering Lt | Improvements in or relating to power operated door equipment |
GB1150484A (en) * | 1965-08-26 | 1969-04-30 | Morgan Construction Co | Stroke Adjusting Mechanism for Transfer Apparatus |
GB1158795A (en) * | 1966-10-21 | 1969-07-16 | Caterpillar Tractor Co | Resilient Link Construction |
GB1194891A (en) * | 1966-05-11 | 1970-06-17 | Philips Nv | Mowing Machine |
GB1342356A (en) * | 1970-06-18 | 1974-01-03 | Massey Ferguson Perkins Ltd | Drive transmission mecahnism |
GB1362387A (en) * | 1970-08-03 | 1974-08-07 | Bendix Corp | Station for automatic nonsynchronous multistation assembly machine |
GB1395021A (en) * | 1972-01-28 | 1975-05-21 | Automotive Prod Co Ltd | Operating mechanism for the control valves of liquid pressure braking systems |
GB1488163A (en) * | 1974-02-01 | 1977-10-05 | Cav Ltd | Linkage mechanism |
GB2029542A (en) * | 1978-08-24 | 1980-03-19 | Rau Swf Autozubehoer | Power transmitting coupling for windscreen wipers |
-
1983
- 1983-03-25 GB GB08308226A patent/GB2137302A/en not_active Withdrawn
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB380941A (en) * | 1931-04-23 | 1932-09-29 | Eugen Assar Alexis Gronwall | Improvements in or relating to methods for the production of hard alloys |
GB675449A (en) * | 1949-08-23 | 1952-07-09 | Dentatus Ab | Improvements in and relating to power-driven reciprocatory hand tools |
GB886430A (en) * | 1957-07-20 | 1962-01-10 | Bosch Gmbh Robert | Improvements in and relating to windscreen wipers for motor vehicles |
GB1024375A (en) * | 1963-03-27 | 1966-03-30 | Charles Rodney Dyson | A conveyor including an overload prevention device |
GB1049469A (en) * | 1964-09-24 | 1966-11-30 | Irvin Hudson Ltd | Improvements in or relating to rod devices for transmitting to-and-fro-motion |
GB1070084A (en) * | 1965-02-09 | 1967-05-24 | G D Peters & Co Engineering Lt | Improvements in or relating to power operated door equipment |
GB1150484A (en) * | 1965-08-26 | 1969-04-30 | Morgan Construction Co | Stroke Adjusting Mechanism for Transfer Apparatus |
GB1194891A (en) * | 1966-05-11 | 1970-06-17 | Philips Nv | Mowing Machine |
GB1158795A (en) * | 1966-10-21 | 1969-07-16 | Caterpillar Tractor Co | Resilient Link Construction |
GB1342356A (en) * | 1970-06-18 | 1974-01-03 | Massey Ferguson Perkins Ltd | Drive transmission mecahnism |
GB1362387A (en) * | 1970-08-03 | 1974-08-07 | Bendix Corp | Station for automatic nonsynchronous multistation assembly machine |
GB1395021A (en) * | 1972-01-28 | 1975-05-21 | Automotive Prod Co Ltd | Operating mechanism for the control valves of liquid pressure braking systems |
GB1488163A (en) * | 1974-02-01 | 1977-10-05 | Cav Ltd | Linkage mechanism |
GB2029542A (en) * | 1978-08-24 | 1980-03-19 | Rau Swf Autozubehoer | Power transmitting coupling for windscreen wipers |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1065487A2 (en) * | 1999-06-29 | 2001-01-03 | Kavlico Corporation | Redundant linkage and sensor assembly |
EP1065487A3 (en) * | 1999-06-29 | 2001-01-17 | Kavlico Corporation | Redundant linkage and sensor assembly |
US6311566B1 (en) | 1999-06-29 | 2001-11-06 | Kavlico Corporation | Redundant linkage and sensor assembly |
Also Published As
Publication number | Publication date |
---|---|
GB8308226D0 (en) | 1983-05-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5088370A (en) | Sheet material cutting apparatus | |
US4378637A (en) | Hedge cutting arrangement | |
DE4036451A1 (en) | ENGINE-DRIVEN, SWIVELING EXTERNAL MIRROR FOR VEHICLES | |
CA2105350A1 (en) | Coupling Mechanism for a Compressor | |
CN1009693B (en) | Movable rotor electric machines | |
US4434578A (en) | Automatic traffic control gate | |
US4187734A (en) | Electric regulating device | |
GB2137302A (en) | Overload mechanism | |
US4508213A (en) | Hydraulic take-up device | |
KR100416183B1 (en) | Bush cutting machine | |
US5794529A (en) | Compliant drive for printing presses | |
US4575200A (en) | Flexible mirror device | |
GB2279423A (en) | Compact motor with speed reducing mechanism | |
FR2556636A1 (en) | COMPONENT POSITIONING HEAD CONTROL DEVICE | |
US5421055A (en) | Variable pressure windshield wiper arm | |
HUT65312A (en) | Apparatus for operating brake | |
JP3197784B2 (en) | Overload stop mechanism for shaft mounted motor | |
CA1283871C (en) | Combination electric and mechanical servo drive clutch | |
EP0840425A1 (en) | Motor-driven cylinder | |
FR2371134A1 (en) | CLUTCH MECHANISM FOR CHOPPER OF A COMBINED HARVESTER | |
US4372180A (en) | Gear motor torque reaction absorber | |
US2074110A (en) | Automatic starter for internal combustion engines | |
US4884319A (en) | Apparatus for arresting the rotary tower of a bale opening device | |
EP0683076B1 (en) | A windshield wiper driving mechanism | |
KR200212162Y1 (en) | Power transmission device for car monitor |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |