CN107089264B - Follow-up self-locking energy-saving device - Google Patents
Follow-up self-locking energy-saving device Download PDFInfo
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- CN107089264B CN107089264B CN201710419514.4A CN201710419514A CN107089264B CN 107089264 B CN107089264 B CN 107089264B CN 201710419514 A CN201710419514 A CN 201710419514A CN 107089264 B CN107089264 B CN 107089264B
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 239000012530 fluid Substances 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 11
- 230000007704 transition Effects 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000013016 damping Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 20
- 238000010586 diagram Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/09—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by means for actuating valves
- B62D5/091—Hydraulic steer-by-wire systems, e.g. the valve being actuated by an electric motor
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention relates to a follow-up self-locking energy-saving device which comprises an input shaft, an upper end cover, a valve body, a shell, a bottom cover, an output shaft, a locking valve core, a return spring and a blade, wherein the follow-up self-locking energy-saving device is divided into an upper part and a lower part, the upper part is a driving and return control device, the lower part is a hydraulic locking and unlocking device, and the two parts realize a linkage function through the output shaft and the valve core which is arranged at the end part of the output shaft and is connected with an input shaft gear. The input shaft is connected with the output shaft through a circumferential spring, a locking valve core arranged at the end part of the output shaft through gear connection, and locking fixation at the middle position is realized through a self-locking spring and a steel ball. The side surface of the end part of the output shaft is provided with an orifice and a damping hole for liquid circulation, and the corresponding shell is provided with a ring groove for liquid circulation. The invention has compact structure and is convenient to install; according to the power state of the input shaft, the function of the output shaft follow-up locking when the input shaft loses power is realized by utilizing a return spring, a locking valve core and the like.
Description
Technical Field
The invention relates to a follow-up self-locking energy-saving device which is used for follow-up locking of a rotating mechanism, such as a wire steering system, reduces energy consumption for keeping the current position and belongs to the fields of automobiles and electromechanics.
Background
In the steering process of the steer-by-wire automobile, the working condition that the steering angle is constant at a certain position or the steering speed is very low is often existed. The motor working state under the working condition can be discretized into two discrete states of simply driving the automobile to a specified angle and keeping the automobile at the angle through a reasonable control method. When this angle is maintained, the motor consumes a large amount of electrical energy for overcoming the resistance of the aligning torque. If the resistance directly acts on the automobile frame, the energy consumption of the motor in the state can be saved, so that the energy saving of steering is realized. Based on the above, a follow-up self-locking mechanical device is added between the steering motor and the steering gear, so that automatic unlocking and power combination during motor driving are realized, and automatic locking during motor driving stopping is realized, thereby effectively realizing energy saving of a steering system.
At present, a device with similar functions is mainly used for a normally closed braking system of an elevator system, the system is in a normally closed state when being electrified, the continuous electricity consumption overcomes the spring force, and the device belongs to a device with higher energy consumption. The hydraulic mechanical principle is adopted, the functions of return, in-place self-locking, follow-up unlocking and the like are realized by means of the spring, the designed mechanism has the advantages of exquisite and compact structure, can automatically realize locking and unlocking according to the power state of the input shaft, and has wide application in intermittent mechanical transmission, steer-by-wire energy-saving control and the like requiring position locking.
Disclosure of Invention
The invention aims to provide a follow-up self-locking energy-saving device, which ensures that an output shaft rotates along with an input shaft when the input shaft outputs power, and the output shaft is locked in the current state by a spring return and hydraulic locking mode when the input shaft is in a free state without power output.
In order to achieve the above purpose, the technical scheme of the invention is as follows: the utility model provides a follow-up auto-lock economizer also uses as hydraulic machinery follow-up brake device, including input shaft, upper end cover, valve body, casing, bottom, output shaft, locking case, input shaft sealing washer, return spring, one-way case, blade, the casing is connected with the bottom, the output shaft comprises input, blade installation axle journal, output is whole, the output of output shaft passes through the hole sliding support of casing, the input sliding support of output shaft is in the tip hole of casing, the output of output shaft stretches out its characterized in that from the bottom:
the inner cavity of the bottom cover, the input end of the output shaft and the shell are provided with blade movement cavities, the inner cavity of the shell and the bottom cover are provided with the same guide rail curved surface, the inner cavity of the shell is provided with a valve body installation cavity on the contraction side of the guide rail curved surface, and a valve body is installed in the valve body installation cavity; the blades are uniformly distributed along the circumference, and the rear end parts of the blades are provided with spring mounting shafts; blade guide grooves are uniformly distributed on the blade mounting shaft neck of the output shaft along the circumference, radial spring mounting holes are formed in the guide grooves, compression springs are mounted in the radial spring mounting holes, one ends of the compression springs are attached to the bottoms of the radial spring mounting holes, and the other ends of the compression springs are sleeved on the spring mounting shaft and propped against the rear ends of the blades, so that the blades are guaranteed to be clung to the curved surfaces of the guide rails; the input end of the output shaft is provided with an inner groove for placing the input shaft; the upper end cover is connected to the shell, the input shaft is supported by the upper end cover in a sliding way and extends into the inner groove of the output shaft, and an annular mounting cavity is formed between the outer circle of the input shaft and the inner groove of the output shaft; an orifice, a flow hole and a damping hole (liquid self-leakage between internal contact surfaces is adopted as the damping hole) are formed in the excircle of the input end of the output shaft, the one-way valve hole is communicated with an oil duct formed by a ring groove processed on the inner hole of the shell, and the inner ends of the orifice and the flow hole are communicated with the inner groove; a one-way valve is arranged in the one-way valve hole;
the inner groove of the output shaft is provided with a first bulge, the output shaft is correspondingly provided with a second bulge, the return spring is arranged in the annular mounting cavity, and two ends of the return spring are respectively contacted with the output shaft and the input shaft; processing a spherical groove on the end face of the output shaft below the installation position of the input shaft, and forming self-locking with the self-locking steel ball;
the inner groove on the output shaft 10 is provided with an eccentric hole for installing a locking valve core; the input shaft is connected with the locking valve core through gear transmission, and the locking valve core rotates to the maximum opening position when the input shaft rotates to be in contact with the output shaft; when the input shaft is in the middle position, the locking valve core is in a closed state; two groups of oil channels which are not communicated are processed in the valve body, one end of each oil channel is connected with a hydraulic cavity of a communicating blade, the other end of each oil channel is connected with an annular oil groove of the cylindrical surface of the output shaft, the oil channels are communicated with the position where the locking valve core is located through the annular oil grooves and holes processed in the cylindrical surface of the output shaft, and the communication or the disconnection between the two groups of oil channels is controlled through the locking valve core.
When the input shaft end is at the middle position, the input shaft has a free stroke with a certain angle relative to the output shaft, and the free stroke is consistent with the rotation angle of the locking valve core; when the free stroke rotates in, the return spring between the two shafts is stressed to push the output shaft to axially rotate; after the free stroke is finished, the input shaft is contacted with the output shaft, and the power is transmitted to drive the output shaft to rotate.
When the input shaft end is unpowered and in a free state, the input shaft end reversely rotates under the action of a return spring; at the moment, the one-way valve of the cavity is opened, so that the fluid flow is increased, and the return of the input shaft is quickened; when the input shaft returns to a certain angle from the middle position, the flow hole of the other cavity is blocked, the flow of the outflow liquid is reduced, the rotating speed of the shaft is reduced, and the inertia of the shaft cannot overcome the resistance of the self-locking steel ball to continue rotating; if the self-locking steel ball overcomes the resistance to continue to rotate, the return spring and the fluid form resistance together to push the self-locking steel ball to the middle position capable of forming self-locking.
When the input shaft end is unpowered and in a free state, the input shaft end reversely rotates under the action of the return spring. At this time, the one-way valve of the cavity is opened, so that the fluid flow is increased, and the return of the input shaft is quickened. When the input shaft returns to a certain angle (such as 5 degrees) from the middle position, the flow hole of the other cavity is blocked, the flow of the outflow liquid is reduced, the rotating speed of the shaft is reduced, and the inertia of the shaft cannot overcome the resistance of the self-locking steel ball to continue rotating. If the self-locking steel ball overcomes the resistance to continue to rotate, the return spring and the fluid form resistance together to push the self-locking steel ball to the middle position capable of forming self-locking.
When the blades rotate around the shaft along the direction of the annular guide rail, the blades slide in a telescopic way along the radial direction of the shaft under the action of the guide rail, so that the volume of fluid driven by the blades is changed, and the creation of the compression cavity and the expansion cavity is realized.
Three square grooves are uniformly distributed on the shaft, when the blades slide radially, the blades can be completely retracted into the grooves, and cylindrical guide holes along the directions of the grooves are uniformly distributed along the axial direction so as to avoid interference.
The invention has the beneficial effects that: the invention has compact structure and is convenient to install; according to the power state of the input shaft, the function of the output shaft follow-up locking when the input shaft loses power is realized by utilizing a return spring, a locking valve core and the like.
Drawings
FIG. 1 is a schematic diagram of a follow-up self-locking energy-saving device according to the present invention.
FIG. 2 is a schematic diagram of a B-B cross-sectional structure of a servo self-locking energy-saving device of the present invention.
FIG. 3 is a schematic view of a C-C section structure of a servo self-locking energy saving device of the invention.
FIG. 4 is a schematic view of a D-D section structure of a servo self-locking energy saving device of the invention.
FIG. 5 is a schematic view of the E-E cross-section structure of a servo self-locking energy saving device of the present invention.
FIG. 6 is a schematic F-F section structure of a servo self-locking energy saving device of the invention.
Fig. 7 is a three-dimensional exploded view of the present invention.
Fig. 8 is a schematic structural view of the output shaft.
Fig. 9 is a section view taken along G-G in fig. 9.
Fig. 10 is a schematic view of the structure of three blades in the present invention.
Fig. 11 is a schematic diagram of a guide rail transition curve calculation principle.
FIG. 12 is a graph of an example of rail transition curve calculation.
Fig. 13 is a state diagram of the present invention in use in an automobile steering gear.
The figure shows: 1-an input shaft; 2-upper end cap bolts; 3-an upper end cap; 4-self-locking springs; 5-an upper end cover O-shaped sealing ring; 6-self-locking steel balls; 7-a valve body; 8-a housing; 9-a bottom cover; 10-an output shaft; 11-an output shaft sealing O-ring; 12-a bottom cover sealing ring; 13-a bottom cap bolt; 14-leaf springs; 15-locking the valve core; 16-input shaft seal ring; 17-a return spring; 18-a one-way valve core; 19-a one-way valve spring; 20-leaf blades; 21-leaf; 22-leaf; 23-orifice; 24-flow holes; t1, T2-fluid channels.
Detailed Description
The invention is further described below with reference to fig. 1-9, as follows: the utility model provides a follow-up auto-lock economizer, including input shaft 1, upper end cover bolt 2, upper end cover 3, auto-lock spring 4, upper end cover O type sealing washer 5, auto-lock steel ball 6, valve body 7, casing 8, bottom 9, output shaft 10, output shaft seal O type circle 11, bottom sealing washer 12, bottom bolt 13, leaf spring 14, locking case 15, input shaft sealing washer 16, return spring 17, check case 18, check valve spring 19, blade 20, blade 21, blade 22, casing 8 is connected with bottom 9, output shaft 10 comprises input, blade installation journal, output is whole, the output is slided and is supported through the hole of casing to the output, the input of output shaft is slided and is supported in the tip hole of casing, the output of output shaft stretches out from the bottom;
the inner cavity of the bottom cover 9, the input end of the output shaft 10 and the shell 8 are provided with blade movement cavities, the inner cavity of the shell 8 and the bottom cover 10 are provided with the same guide rail curved surface, the inner cavity of the shell is provided with a valve body installation cavity on the contraction side of the guide rail curved surface, and the valve body 7 is installed in the valve body installation cavity;
the three blades (20, 21, 22) are uniformly distributed along the circumference, and the rear end parts of the blades are provided with spring mounting shafts; blade guide grooves are uniformly distributed on the blade mounting shaft neck of the output shaft along the circumference, radial spring mounting holes are formed in the guide grooves, compression springs are mounted in the radial spring mounting holes, one ends of the compression springs are attached to the bottoms of the radial spring mounting holes, and the other ends of the compression springs are sleeved on the spring mounting shaft and propped against the rear ends of the blades, so that the blades are guaranteed to be clung to the curved surfaces of the guide rails; the input end of the output shaft 10 is provided with an inner groove for placing the input shaft; the upper end cover 5 is connected to the shell 8, the input shaft 1 is supported in a sliding way through the upper end cover 5 and extends into the inner groove of the output shaft, and an annular mounting cavity is formed between the outer circle of the input shaft and the inner groove of the output shaft; an orifice 23, a flow hole 24 and a one-way valve hole are arranged on the excircle of the input end of the output shaft and are communicated with an oil duct formed by a ring groove processed on the inner hole of the shell, and the inner ends of the orifice 23 and the flow hole 24 are communicated with the inner groove to form an oil duct T1; a one-way valve (a one-way valve core 18 and a one-way valve spring 19) is arranged in the one-way valve hole;
the inner groove of the output shaft 1 is provided with a first bulge B, the output shaft is correspondingly provided with a second bulge A, the return spring 17 is arranged in the annular mounting cavity, and two ends of the return spring are respectively contacted with the output shaft 10 and the input shaft 1; a spherical groove is processed on the end face of the output shaft below the installation position of the input shaft and is used for being matched with the self-locking steel ball 6 and the spring 4 to form self-locking;
the inner groove on the output shaft 10 is provided with an eccentric hole for installing a locking valve core 15; the input shaft 1 is connected with the locking valve core 10 through a gear transmission (the transmission ratio is designed according to the requirement, and is usually 1:2 or 1:3), and the locking valve core 15 rotates to the maximum opening position when the input shaft rotates to be contacted with the output shaft; when the input shaft is in the middle position, the locking valve core 15 is in a closed state; two groups of oil channels which are not communicated are processed in the valve body, one end of each oil channel is connected with a hydraulic cavity of a communicating blade, the other end of each oil channel is connected with an annular oil groove of the cylindrical surface of the output shaft, the oil channels are communicated with the position where the locking valve core is located through the annular oil groove and the hole which are processed in the cylindrical surface of the output shaft, so that an oil channel T2 for liquid circulation is formed, and the communication or the disconnection between the two groups of oil channels is controlled through the locking valve core;
in the intermediate position, the input shaft 1 has a free travel with a certain angle relative to the output shaft 10, which corresponds to the angle of rotation of the locking valve element 15; when rotating in the free stroke, the return spring 17 is pushed to axially rotate the output shaft. After the free stroke is finished, the input shaft is attached to the output shaft, and the output shaft is driven to rotate by transmitting power.
When the input shaft end 1 is unpowered and in a free state, the input shaft end is reversely rotated under the action of the return spring 17; at this time, the one-way valve core 18 of the cavity moves upwards, the one-way valve is opened, the fluid flow is increased, and the return of the input shaft is quickened. When the input shaft returns to a certain angle (such as 5 DEG) from the middle position, the flow hole of the other cavity is blocked, the flow of the outflow liquid is reduced, the rotating speed of the shaft is reduced, and the inertia of the shaft cannot overcome the resistance of the self-locking steel ball 6 to continue rotating. If it overcomes the resistance to continue to rotate, the return spring 17 and the fluid form resistance together, and the return spring is pushed to the middle position where the self-locking steel ball 6 can form self-locking.
When the blades rotate around the shaft along the direction of the annular guide rail, the blades slide in a telescopic way along the radial direction of the shaft under the action of the guide rail, the volume of fluid driven by the blades is changed, and the creation of the compression cavity and the expansion cavity is realized.
The radial spool mounting holes are staggered in the axial direction, as shown in fig. 10, and the spring mounting shafts on the plurality of blades (the first blade 7, the second blade 12 and the third blade 10) are correspondingly arranged with the radial spool mounting holes, so that movement interference is avoided, mounting interference is avoided, and the purpose of easy arrangement is achieved.
As shown in fig. 1 and 7, bolt mounting holes are reserved on the shell and the bottom cover, and key connection interfaces are reserved on the input end of the input shaft 1 and the output end of the output shaft 10. The end cap of the device is secured to the housing of the rotary mechanism (e.g., steering gear) by bolting, and the shaft is secured to the corresponding rotary member by keying, the device is positively installed in the rotary mechanism. When the power source (such as a motor) drives the input shaft to rotate, the input shaft drives the valve core to rotate, contacts with the locking, compresses the return spring, drives the output shaft to rotate, and the blades on the output shaft are clung to the guide rail to rotate under the action of the spring to drive hydraulic oil to circulate through the oil duct. When the input shaft does not input power, the return spring drives the input shaft to return, so that the valve core is driven to rotate to a locking position, the oil duct is interrupted, the blades are fixed at the current position, and locking of the output shaft is achieved.
As shown in FIG. 11, the maximum diameter of the guide rail is r 1 The distance from the point P (x, y) of the transition curve to the original point is r (theta), the included angle between the line OP and the ordinate is theta, the included angle between the extending and contracting direction of the blade and the normal direction of the transition curve is delta, the angle is designed as a function delta (theta) about theta, the transition curve of the guide rail is designed according to the expected change rule of delta (theta), and then the curve equation can be obtained through the graph of FIG. 11:
where e is a natural constant, its value is about 2.71828; d is the "differential minus" in the integral expression;
the change rule of the angle delta (theta) adopts a cosine curve and a parabola, for example, the angle delta (theta) is designed to be a fixed value, and two ends of the transition curve need to be transited through a round angle.
The guide rails of the shell and the end cover are processed by adopting a numerical control processing scheme, and the curve is obtained by adopting Matlab numerical calculation; for example take r 1 Let the maximum value of the angle δ (θ) be δ =100 0 The track curve rotates by an angle theta 0 The curves of design delta (theta) are respectively cosine curves (delta) 1 ) Parabolic (delta) 2 ) Constant value (delta) 3 ) The following formula is shown:
δ 1 ＝δ 0 ·(1+cos(2πθ/θ 0 +π))/2
δ 2 ＝δ 0 ·((θ 0 /2) 2 -(θ-θ 0 /2) 2 )/(θ 0 /2) 2
δ 3 ＝δ 0
taking delta 0 ＝20°，θ 0 =70°, three different rail transition curves (which were rotation transformed in Matlab) were obtained as shown in fig. 12.
As shown in fig. 13, an input shaft of a follow-up self-locking energy-saving device A2 of the present invention is connected with a steering motor A1, and an output shaft of the follow-up self-locking energy-saving device A2 of the present invention is connected with a steering pull rod assembly A3.
The invention can also be used as a hydraulic mechanical follow-up brake device.
Claims (4)
1. The follow-up self-locking energy-saving device comprises an input shaft, an upper end cover, a valve body, a shell, a bottom cover, an output shaft, a locking valve core, an input shaft sealing ring, a return spring, a one-way valve core and a blade, wherein the shell is connected with the bottom cover, the output shaft is integrally formed by an input end, a blade mounting journal and an output end, the output end of the output shaft is slidably supported through an inner hole of the shell, the input end of the output shaft is slidably supported in an inner hole of the end part of the shell, the output end of the output shaft extends out from the bottom cover,
the method is characterized in that:
the inner cavity of the bottom cover, the input end of the output shaft and the shell are provided with blade movement cavities, the inner cavity of the shell and the bottom cover are provided with the same guide rail curved surface, the inner cavity of the shell is provided with a valve body installation cavity on the contraction side of the guide rail curved surface, and a valve body is installed in the valve body installation cavity;
the blades are uniformly distributed along the circumference, and the rear end parts of the blades are provided with spring mounting shafts; blade guide grooves are uniformly distributed on the blade mounting shaft neck of the output shaft along the circumference, radial spring mounting holes are formed in the guide grooves, compression springs are mounted in the radial spring mounting holes, one ends of the compression springs are attached to the bottoms of the radial spring mounting holes, and the other ends of the compression springs are sleeved on the spring mounting shaft and propped against the rear ends of the blades, so that the blades are guaranteed to be clung to the curved surfaces of the guide rails; the input end of the output shaft is provided with an inner groove for placing the input shaft; the upper end cover is connected to the shell, the input shaft is supported by the upper end cover in a sliding way and extends into the inner groove of the output shaft, and an annular mounting cavity is formed between the outer circle of the input shaft and the inner groove of the output shaft; an orifice, a flow hole and a one-way valve hole are arranged on the excircle of the input end of the output shaft and are communicated with an oil duct formed by a ring groove processed on the inner hole of the shell, and the inner ends of the orifice and the flow hole are communicated with the inner groove; a one-way valve is arranged in the one-way valve hole;
the inner groove of the output shaft is provided with a first bulge, the output shaft is correspondingly provided with a second bulge, the return spring is arranged in the annular mounting cavity, and two ends of the return spring are respectively contacted with the output shaft and the input shaft; processing a spherical groove on the end face of the output shaft below the installation position of the input shaft, and forming self-locking with the self-locking steel ball;
the inner groove on the output shaft is provided with an eccentric hole for installing a locking valve core; the input shaft is connected with the locking valve core through gear transmission, and the locking valve core rotates to the maximum opening position when the input shaft rotates to be in contact with the output shaft; when the input shaft is in the middle position, the locking valve core is in a closed state; two groups of oil channels which are not communicated are processed in the valve body, one end of each oil channel is connected with a hydraulic cavity of a communicating blade, the other end of each oil channel is connected with an annular oil groove of the cylindrical surface of the output shaft, the oil channels are communicated with the position where the locking valve core is located through the annular oil grooves and holes processed in the cylindrical surface of the output shaft, and the communication or the disconnection between the two groups of oil channels is controlled through the locking valve core.
2. The servo self-locking energy saving device as set forth in claim 1, wherein the input shaft has a free travel with a certain angle relative to the output shaft when the input shaft end is at the intermediate position, the free travel being consistent with the rotation angle of the locking valve core; when the free stroke rotates in, the return spring between the two shafts is stressed to push the output shaft to axially rotate; after the free stroke is finished, the input shaft is contacted with the output shaft, and the power is transmitted to drive the output shaft to rotate.
3. The servo self-locking energy saving device as set forth in claim 1, wherein when the input shaft end is in a free state without power, the servo self-locking energy saving device rotates reversely under the action of the return spring; at the moment, the one-way valve of the cavity is opened, so that the fluid flow is increased, and the return of the input shaft is quickened; when the input shaft returns to a certain angle from the middle position, the flow hole of the other cavity is blocked, the flow of the outflow liquid is reduced, the rotating speed of the shaft is reduced, and the inertia of the shaft cannot overcome the resistance of the self-locking steel ball to continue rotating; if the self-locking steel ball overcomes the resistance to continue to rotate, the return spring and the fluid form resistance together to push the self-locking steel ball to the middle position capable of forming self-locking.
4. The follow-up self-locking energy-saving device according to claim 1, wherein an included angle between the extension direction of the blade and the normal direction of a transition curve is delta, the angle is designed as a function delta (theta) related to theta, and the transition curve of the guide rail is designed according to the change rule of the expected included angle delta (theta); let the maximum diameter of the guide rail be r 1 The distance from the point P (x, y) on the transition curve to the origin O of coordinates is r (theta), the included angle between the line OP and the ordinate is theta, and the obtained curve equation is as follows:
where e is a natural constant, its value is about 2.71828; d is the "differential sign" in the integral expression;
the change rule of the angle delta (theta) adopts a cosine curve and a parabola, for example, the delta (theta) is designed to be a fixed value, and the two ends of the transition curve need to be transited through a fillet.
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| CN201710419514.4A CN107089264B (en) | 2017-06-06 | 2017-06-06 | Follow-up self-locking energy-saving device |
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| CN201710419514.4A CN107089264B (en) | 2017-06-06 | 2017-06-06 | Follow-up self-locking energy-saving device |
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| US11710592B2 (en) * | 2019-11-17 | 2023-07-25 | Littelfuse, Inc. | Bi-stable mechanical latch including positioning spheres |
| CN113815761A (en) * | 2021-03-17 | 2021-12-21 | 王沉津 | Labor-saving bicycle shock absorber |
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| CN104494692A (en) * | 2014-11-04 | 2015-04-08 | 江苏大学 | Electric bypass valve device |
| DE102015106313A1 (en) * | 2015-04-24 | 2016-10-27 | Tedrive Steering Systems Gmbh | Power steering assembly with steering torque overlay |
| CN106438815A (en) * | 2016-11-07 | 2017-02-22 | 湖北汽车工业学院 | Electronic control variable-damping rotation hydraulic damper |
| CN206766114U (en) * | 2017-06-06 | 2017-12-19 | 湖北汽车工业学院 | A kind of servo-actuated self-locking energy saver |
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| CN107089264A (en) | 2017-08-25 |
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