A kind of retarder
Technical field
What the present invention relates to is a kind of mechanical device of automatic deceleration.
Background technique
Present retarder is the energy-dissipating type mechanical device mostly, needs power supply, and structure is comparatively complicated.And some other speed reducer such as energy-saving exists too; As utilize inertia damping principle and change gear train to realize slowing down; And utilizing electromagnetism cutting braking technique to realize slowing down or the like, these retarders exist complex structure, cost height, poor stability and shortcomings such as manufacture cost and maintenance cost height.
The Chinese invention patent application number is 200610109216.7 to disclose a kind of no energy consumption and subtract power, retarder automatically; It is in the master gear both sides that receive input power two identical driving gears to be set; And link to each other with corresponding two tooth sector through transmitting assemblies (bearing and gear); Two tooth sector intermediate arrangement a toothed pull bar is arranged, pull bar two end devices have piston, and the corresponding cylinder of band pore.Such structure can make the power of input transfer the pressure of piston to air in the cylinder to; And make metastable dynamic air pressure of the inside and outside generation of cylinder poor thus; Also generate a metastable dynamic resistance thus,, finally reach the purpose that evenly subtracts power, deceleration to weaken input power.Though this structure has the advantage of not having power consumption, has shortcomings such as complex structure, cost height equally, in addition, in the reducing gear, through a plurality of gear transmissions, in use, regularly carry out maintaining, increase maintenance cost.
Summary of the invention
The objective of the invention is to overcome above-mentioned defective, a kind of simple in structure, non-maintaining, cost is low and energy consumption is low retarder is provided.
The technological scheme that technical problem adopted that the present invention solves is:
A kind of retarder; Comprise that cylinder, piston, piston and connecting rod top movable join; The connecting rod bottom connects bent axle, it is characterized in that the top of the airtight cylinder body of described cylinder is provided with pore, and bent axle rotates drivening rod; The air chamber space that connecting rod drives Piston Compression or widens cylinder, bent axle is the speed reducer of output.Bent axle is for receiving the input power unit, when bent axle rotates, when connecting rod drives Piston Compression or widens the air chamber space of cylinder, because the motion of cylinder will form draught head.Under the effect of draught head, effectively control air displacement by the size of pore and carry out the fast and slow of effective control piston speed like this.And produce a constant resistance of relative dynamic thus and react on piston-connecting rod-bent axle, finally reach the purpose of deceleration.
Said cylinder and stopper rod be two and more than.Two cylinders and dual-piston structure are for air gets into and discharge cylinder two chambeies (a chamber air inlet, a chamber exhaust) successively; Three cylinders and three piston structures, the chamber and two chambeies (two chamber air inlets, a chamber exhaust or a chamber air inlet, the two chamber exhausts) that get into and discharge cylinder for air successively; Four-cylinder and four-piston configuration are for air gets into and discharge cylinder two chambeies (two chamber air inlets, two chamber exhausts) successively.In the specific implementation, four-cylinder and four-piston configuration are preferred structure of the present invention.
Above-mentioned pore is located on the cylinder cap.
Above-mentioned outlet pipe is provided with the controlling device of regulating tolerance, also can be designed to fixedly shape.Controlling device mainly is a control pore Throughput, realizes speed governing.
Above-mentioned controlling device can adopt throttle valve.Regulate the size of throttle valve valve port opening, regulated the pore Throughput simultaneously, control gaseous flow within a certain period of time as required is to regulate the rotating speed of bent axle.When closing throttle valve,, can realize stopping operating because pore can not be ventilated.
On above-mentioned bent axle, be provided with stabilizer, to strengthen the stability of retarder.
The present invention is used in the occasions such as the automatic deceleration of decline of mechanical Emergency Ladder, better effects if.
The invention has the beneficial effects as follows: because the present invention adopts the cylinder action principle, utilize the pore Throughput, form the pressure difference of gas, obtain resistance and realize the purpose of slowing down need not increasing power newly, almost do not have energy consumption, simple in structure, non-maintaining.
Description of drawings
Below in conjunction with accompanying drawing and embodiment invention is further specified.
Fig. 1 is the schematic representation of two cylinders of first embodiment of the invention and dual-piston structure.
Fig. 2 is the schematic representation of second embodiment of the invention four-cylinder and four-piston configuration.
Among the figure: 1, cylinder 2, piston 3, connecting rod 4, wrist pin 5, bent axle 6, pore 7, cylinder cap 8, throttle valve 9, stabilizer, 10, exhaust manifolds
Embodiment
First embodiment: in Fig. 1, a kind of retarder adopts two cylinders and dual-piston structure; Comprise that cylinder 1, piston 2, piston 2 middle parts are equipped with wrist pin 4, join that connecting rod 3 bottoms connect bent axle 5 through it and connecting rod 3 tops; Bent axle 5 is provided with stabilizer 9; Cylinder cap 7 on the cylinder 1 is provided with pore 6, and pore 6 is provided with throttle valve 8, is connected with exhaust manifolds 10 on the pore 6 of the air outlet of throttle valve 8.In the embodiment of the invention, two cylinders are respectively another chamber exhaust of a chamber air inlet, and bent axle 5 is for receiving the input power unit, and when bent axle 5 rotates, when connecting rod 3 drives Piston Compression or widens the air chamber space of cylinder 1, the air chamber of cylinder 1 and atmosphere will form draught head.Under the effect of draught head, gas will flow at the air chamber of atmosphere and cylinder 1 through the pore 6 on cylinder 1 top like this, and pore 6 relatively-stationary Throughputs are with effective control gaseous flow within a certain period of time.And lasting external force effect arranged again, so these will make indoor and outdoor form the draught head that relative dynamic is constant, and produce a constant resistance of relative dynamic thus and react on piston-connecting rod-bent axle, finally reach the purpose that subtracts power, deceleration.Throttle valve 8 is a controlling device, regulates the size of throttle valve 8 valve port opening, has regulated pore 6 Throughputs simultaneously, and control gaseous flow within a certain period of time as required is to regulate the rotating speed of bent axle 5.When closing throttle valve 8,, can realize stopping operating because pore 6 can not be ventilated.
Second embodiment: be four-cylinder and four-piston configuration in Fig. 2; Comprise that cylinder 1, piston 2, piston 2 middle parts are equipped with wrist pin 4, join that connecting rod 3 bottoms connect bent axle 5 through it and connecting rod 3 tops; Bent axle 5 is provided with stabilizer 9; Cylinder cap 7 on the cylinder 1 is provided with pore 6, and pore 6 is provided with throttle valve 8, is connected with exhaust manifolds 10 on the pore 6 of the air outlet of throttle valve 8.In the embodiment of the invention, four-cylinder is respectively two chamber air inlets, two chamber exhausts in addition, and its principle is identical with first embodiment.
It can be used on the present invention in the occasions such as the automatic deceleration of decline of mechanical Emergency Ladder.
At last, it is also to be noted that what more than enumerate only is specific embodiment of the present invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from disclosed content of the present invention all should be thought protection scope of the present invention.