CN104019188A - Labor-saving rotary power transmission device - Google Patents
Labor-saving rotary power transmission device Download PDFInfo
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- CN104019188A CN104019188A CN201410212786.3A CN201410212786A CN104019188A CN 104019188 A CN104019188 A CN 104019188A CN 201410212786 A CN201410212786 A CN 201410212786A CN 104019188 A CN104019188 A CN 104019188A
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- gear
- lever
- wheel
- gear wheel
- load end
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- 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
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
- F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Transmission (AREA)
Abstract
The invention discloses a labor-saving rotary power transmission device. The labor-saving rotary power transmission device comprises a power end gear, a load end gear, a lever gear, a support point gear and a lever positioning wheel, wherein the power end gear, the load end gear and the support point gear are connected with the lever gear in a rotary transmission mode, the support point gear is located between the power end gear and the load end gear and is closer to the load end gear, the lever positioning wheel can rotate but can not move, and the lever positioning wheel is connected with the lever gear in a positioning mode so that the lever gear can rotate in a positioning mode. On the basis of direct transmission of a traditional gear, the lever gear, the support point gear and the lever positioning gear are additionally provided, three mechanics principles of a lever, a fixed pulley and a movable pulley are integrated, labor-saving transmission of rotary power is achieved, and the power transmission direction can be changed through simple processing according to needs. The labor-saving rotary power transmission device can be widely applied to rotary power transmission of various machines, meets the requirement for load acting, saves power energy, lowers operation cost, and is favorable for environment protection.
Description
Technical field
The present invention relates to a kind of power transmitting deice, relate in particular to a kind of rotating power and economize force transfering device.
Background technique
Machine power mostly is rotating power, especially usings motor as main dynamics equipment, so the power of machinery is transmitted major part, is the transmission of rotating power.The realizations such as one or more in transmission shaft, variable-speed motor, gear and chain are mainly passed through in traditional rotating power transmission, in its transmittance process, power is consistent, cannot realize labour-saving effect, so improve bearing power, just must improve power of motor, just mean the energy that consumes more, many waste resources, not only can not be cost-saving, and be unfavorable for environmental protection.
As everyone knows, lever and movable pulley all have labour-saving advantage, the former by increase the arm of force length between fulcrum and power end and shorten fulcrum and load end between arm of force length, at fulcrum two ends, do work under equal prerequisite, reduce the power of power end, realize labour-saving object; The latter utilizes and to walk around power that the tow rope of movable pulley applies tow rope one end and form double power (apply power beyond the actual immovable point that imputes to the tow rope the other end of power), thereby realizes identical but laborsaving nearly half the object of acting.But lever is reused can waste merit and the time, lowers efficiency, and movable pulley can not change the direction of power, therefore independent use to be just limited by very large in mechanical power transmission be difficult to the effect that reaches desirable.
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Summary of the invention
Object of the present invention is just that in order to address the above problem, providing a kind of utilizes the rotating power that lever, movable pulley and static pulley principle realize laborsaving transmission to economize force transfering device.
The present invention is achieved through the following technical solutions above-mentioned purpose:
A kind of rotating power is economized force transfering device, comprise power end gear and load end gear, also comprise lever and gear wheel, fulcrum gear and lever positioning wheel, described power end gear, described load end gear and described fulcrum gear are connected with described lever and gear wheel rotary drive respectively, and described fulcrum gear is between described power end gear and described load end gear and more near described load end gear; Described lever positioning wheel can rotate but can not move, and positions to be connected to make described lever and gear wheel position rotating between described lever positioning wheel and described lever and gear wheel.
In said structure, whole transfer unit has utilized lever principle, lever and gear wheel is equivalent to the straight line lever in traditional lever, fulcrum gear is equivalent to the fulcrum in traditional lever, distance between power end gear and fulcrum gear is equivalent to the power end arm of force in traditional lever, distance between load end gear and fulcrum gear is equivalent to the load end arm of force in traditional lever, because the power end arm of force is greater than the load end arm of force, so, at fulcrum gear two ends, do work identical in the situation that, power end required drive is less than the load force that load end consumes, realized labour-saving effect.For the ease of installing, lever and gear wheel is greater than other all gears, specifically greatly how much according to application demand, determines.In addition, above-mentioned lever positioning wheel is realized the location of lever and gear wheel and power to variation, played the effect of traditional static pulley, lever and gear wheel is realized laborsaving in transmission process, play the effect of traditional movable pulley, so the present invention combines lever, static pulley and three kinds of mechanics principles of movable pulley, has realized the laborsaving transmission of rotating power.
According to practical application request, lever positioning wheel has multiple mounting modes, be specially: described lever and gear wheel is provided with external tooth and central through bore, described lever positioning wheel is realized and being located by connecting near being installed in the inwall circumference of described lever and gear wheel, in this case, power end gear and load end gear are all installed on outside lever and gear wheel; Or, described lever and gear wheel is provided with external tooth and central through bore, and the inwall circumference of described lever and gear wheel is provided with circular groove, and the circumferential edges of described lever positioning wheel is placed in described circular groove and realizes and being located by connecting, in this case, power end gear and load end gear are all installed on outside lever and gear wheel; Or, described lever and gear wheel is provided with central through bore, and the inwall circumference of described lever and gear wheel is provided with internal tooth, and described lever positioning wheel is located by connecting near outer realization of the outer wall circumference that is installed on described lever and gear wheel, in this case, power end gear and load end gear are all installed in lever and gear wheel; Or, described lever and gear wheel is provided with central through bore, the inwall circumference of described lever and gear wheel is provided with internal tooth, the outer wall circumference of described lever and gear wheel is provided with outer groove, the circumferential edges of described lever positioning wheel is placed in described outer groove and realizes and being located by connecting, in this case, power end gear and load end gear are all installed in lever and gear wheel; Or, described lever and gear wheel is connected with spacing section, outer wall circumference or the inwall circumference of described spacing section are provided with annular groove, the circumferential edges of described lever positioning wheel is placed in described annular groove and realizes and being located by connecting, in this case, power end gear and load end gear may be installed in or beyond lever and gear wheel.
In order to realize best located, described lever positioning wheel is two, is installed on respectively the position of answering with described power end gear and described load end gear mesh.
Preferably, described power end gear, described load end gear and described fulcrum gear are directly connected with a joggle with described lever and gear wheel respectively.This structure is hard drive mechanism, has advantages of that power loses littlely, but close together between power end gear and load end gear, in some applications inconvenience.
Preferably, in the sense of rotation of described lever and gear wheel, the described power end gear of take is starting point, and the described load end gear of take is terminal, forms one section of camber line, and described fulcrum gear is positioned between described camber line location.Like this, the rotation of power end gear drive lever and gear wheel, first its pressure pass through fulcrum gear, then passes through load end gear, can realize best labor-saving effect.
Preferably, the distance of establishing between described power end gear and described fulcrum gear is L1, and the distance between described load end gear and described fulcrum gear is L2, and L1 is not less than the twice of L2.
Long apart from transmission in order to adapt to, described transfer unit also comprises transition gear and chain, between described power end gear, described lever and gear wheel, described transition gear and described load end gear, by described chain, be connected with a joggle, described power end gear, described transition gear and described load end gear lay respectively at the outside of described lever and gear wheel.
In order to make chain near each gear, described transfer unit also comprises press strip gear, described press strip gear is installed on the outside of described lever and gear wheel and near described press strip gear, and described press strip gear makes to form respectively engagement driving between described chain and described power end gear, described lever and gear wheel, described transition gear, described load end gear.
Further, described lever and gear wheel is provided with external tooth and central through bore, the inwall circumference of described lever and gear wheel is provided with circular groove, traversing carriage arm is also installed in the central through bore of described lever and gear wheel, the first end of described traversing carriage arm is installed on the position of close central point in described lever and gear wheel, the second end of described traversing carriage arm is provided with mobile fulcrum wheel, the circumferential edges of described mobile fulcrum wheel is placed in described circular groove, and the first end of described traversing carriage arm is connected with the elastic strip for resetting.By changing the position of the first end of traversing carriage arm, can replace one of them lever positioning wheel with mobile fulcrum wheel, thereby change the arm of force length at fulcrum gear two ends, realize the adjusting of laborsaving degree.
In order to ensure chain in tensioning state, in described transition gear, be provided with central through bore, the inwall circumference of described transition gear is provided with annular spacing groove, transition positioning wheel is installed in the central through bore of described transition gear, the circumferential edges of described transition positioning wheel is placed in described annular spacing groove, on described transition positioning wheel, is also provided with and makes described transition gear away from the spring of described lever and gear wheel.
Beneficial effect of the present invention is:
The present invention is on the direct drive basis of conventional gears, lever and gear wheel, fulcrum gear and positioning wheel have been increased, combine lever, static pulley and three kinds of mechanics principles of movable pulley, realized the laborsaving transmission of rotating power, and simple process can change power transmitting as required, so economizing force transfering device, this rotating power can be widely used in various mechanical rotating powers transmission, when guaranteeing to meet load acting demand, saved power source, reduce operating cost, be beneficial to environmental protection.
Accompanying drawing explanation
Fig. 1 is one of rotating power of the present invention structural representation of economizing force transfering device;
Fig. 2 is two of the rotating power of the present invention structural representation of economizing force transfering device;
Fig. 3 is three of the rotating power of the present invention structural representation of economizing force transfering device.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, Figure 2 and Figure 3, rotating power of the present invention is economized force transfering device and is comprised power end gear 11, load end gear 31, lever and gear wheel 21, fulcrum gear 41 and lever positioning wheel 24, power end gear 11, load end gear 31 and fulcrum gear 41 are connected with lever and gear wheel 21 rotary drives respectively, and fulcrum gear 41 is between power end gear 11 and load end gear 31 and more near load end gear 31; Lever positioning wheel 24 can rotate but can not move, between lever positioning wheel 24 and lever and gear wheel 21, position to be connected and make lever and gear wheel 21 position rotating, lever positioning wheel 24 is two, is installed on respectively the position corresponding with power end gear 11 and load end gear 31.Also show the gear teeth 12 of power end gear 11 and the gear teeth 32 of load end gear 31, the gear teeth 22 of lever and gear wheel 21, the circular groove 23 on the inwall circumference of the gear teeth 42 of fulcrum gear 41 and lever and gear wheel 21 as shown in Figure 1, Figure 2 with in Fig. 3; If the distance between power end gear 11 and fulcrum gear 41 is unmarked in L1(figure), the distance between load end gear 31 and fulcrum gear 41 is unmarked in L2(figure), L1 is not less than the twice of L2.
In practical application, the Placement between power end gear 11, load end gear 31, lever and gear wheel 21, fulcrum gear 41 and lever positioning wheel 24 has multiple choices, respectively has feature, and three embodiments of take are below specifically described as representative:
Embodiment 1:
As shown in Figure 1, power end gear 11, load end gear 31 and fulcrum gear 41 are directly connected with a joggle with lever and gear wheel 21 respectively, in the sense of rotation of lever and gear wheel 21, take power end gear 11 as starting point, take load end gear 31 as terminal, form one section of camber line, fulcrum gear 41 is positioned between this camber line location, in this example, power end gear 11, load end gear 31 and fulcrum gear 41 are and are rotated counterclockwise, lever and gear wheel 21 turns clockwise, and this camber line is arranged in the lower, outer perimeter region of Fig. 1 lever and gear wheel 21; Lever and gear wheel 21 is provided with external tooth 22 and central through bore (unmarked in figure), the inwall circumference of lever and gear wheel 21 is provided with circular groove 23, the circumferential edges of lever positioning wheel 24 is placed in the interior realization of circular groove 23 and is located by connecting, and power end gear 11 and load end gear 31 are all installed on outside lever and gear wheel 21.
Embodiment 2:
As shown in Figure 1, power end gear 11, load end gear 31 and fulcrum gear 41 are directly connected with a joggle with lever and gear wheel 21 respectively, in the sense of rotation of lever and gear wheel 21, take power end gear 11 as starting point, take load end gear 31 as terminal, form one section of camber line, fulcrum gear 41 is positioned between this camber line location, in this example, power end gear 11, load end gear 31 and fulcrum gear 41 are and turn clockwise, lever and gear wheel 21 is rotated counterclockwise, and this camber line is arranged in the upper periphery region of Fig. 2 lever and gear wheel 21; Lever and gear wheel 21 is provided with external tooth 22 and central through bore (unmarked in figure), the inwall circumference of lever and gear wheel 21 is provided with circular groove 23, the circumferential edges of lever positioning wheel 24 is placed in the interior realization of circular groove 23 and is located by connecting, and power end gear 11 and load end gear 31 are all installed on outside lever and gear wheel 21.
In conjunction with Fig. 1 and Fig. 2, in above-described embodiment 1 and embodiment 2, lever positioning wheel 24 can also have other multiple mounting modes, as: lever and gear wheel 21 is provided with external tooth 22 and central through bore, lever positioning wheel 24 is realized and being located by connecting near being installed in the inwall circumference of lever and gear wheel 21, in this case, power end gear 11 and load end gear 31 are all installed on outside lever and gear wheel 21; Or, lever and gear wheel 21 is provided with central through bore, and the inwall circumference of lever and gear wheel 21 is provided with internal tooth, and lever positioning wheel 24 is located by connecting near outer realization of the outer wall circumference that is installed on lever and gear wheel 21, in this case, power end gear 11 and load end gear 31 are all installed in lever and gear wheel 21; Or, lever and gear wheel 21 is provided with central through bore, the inwall circumference of lever and gear wheel 21 is provided with internal tooth, the outer wall circumference of lever and gear wheel 21 is provided with outer groove, the circumferential edges of lever positioning wheel 24 is placed in outer groove and realizes and being located by connecting, in this case, power end gear 11 and load end gear 31 are all installed in lever and gear wheel 21; Or, lever and gear wheel 21 is connected with spacing section, and outer wall circumference or the inwall circumference of spacing section are provided with annular groove, and the circumferential edges of lever positioning wheel 24 is placed in annular groove and realizes and being located by connecting, in this case, power end gear 11 and load end gear 31 may be installed in or beyond lever and gear wheel 21.These several structures all do not illustrate in the drawings, but are convenient to understand in conjunction with Fig. 1 and Fig. 2.
Above-described embodiment 1 and embodiment's 2 structure can realize good labor-saving effect, and its rotating power transmittance process is as follows:
Power end gear 11 rotates as under driven by motor at power equipment, drive lever and gear wheel 21 rotations, lever and gear wheel 21 is realized spacing can not movement by lever positioning wheel 24, lever and gear wheel 21 drives load end gear 31 and 41 rotations of fulcrum gear, in whole device, lever and gear wheel 21 is equivalent to the straight line lever in traditional lever, fulcrum gear 41 is equivalent to the fulcrum in traditional lever, distance between power end gear 11 and fulcrum gear 41 is equivalent to the power end arm of force in traditional lever, distance between load end gear 31 and fulcrum gear 41 is equivalent to the load end arm of force in traditional lever, because the power end arm of force is greater than the load end arm of force, so, at fulcrum gear 41 two ends, do work identical in the situation that, power end required drive is less than the load force that load end consumes, realized labour-saving effect.
But it is limited that above-described embodiment 1 and embodiment's 2 structure is limited to the diameter of lever and gear wheel 21, be difficult to realize long apart from transmission.
Embodiment 3:
As shown in Figure 3, between power end gear 11, lever and gear wheel 21, transition gear 51 and load end gear 31, by chain 8, be connected with a joggle, power end gear 11, transition gear 51 and load end gear 31 lay respectively at the outside of lever and gear wheel 21, two press strip gears 61 and 72 are installed on the outsides of lever and gear wheel 21 and near press strip gear 21, and press strip gear 61 and 72 makes to form respectively engagement driving between chain 8 and power end gear 11, lever and gear wheel 21, transition gear 51, load end gear 31; Lever and gear wheel 21 is provided with external tooth 22 and central through bore, the inwall circumference of lever and gear wheel 21 is provided with circular groove 23, traversing carriage arm 26 is also installed in the central through bore of lever and gear wheel 21, the first end of traversing carriage arm 26 is installed on the interior position near central point of lever and gear wheel 21, the second end of traversing carriage arm 26 is provided with mobile fulcrum wheel 27, the circumferential edges of mobile fulcrum wheel 27 is placed in circular groove 23, and the first end of traversing carriage arm 26 is connected with the elastic strip 25 for resetting; In transition gear 51, be provided with central through bore, the inwall circumference of transition gear 51 is provided with annular spacing groove 53, transition positioning wheel 54 is installed in the central through bore of transition gear 51, the circumferential edges of transition positioning wheel 54 is placed in annular spacing groove 53, is also provided with and makes transition gear 51 away from the spring 55 of lever and gear wheel 21 on transition positioning wheel 54.In Fig. 3, also show 52, two press strip gears 61 of the gear teeth of transition gear 51 and 72 the gear teeth 62 and 72.
The rotating power transmittance process of this structure and embodiment 1 and embodiment 2 are basically identical, and difference is to have replaced the direct engagement driving between each gear with the transmission of chain 8.
The structure of above-described embodiment 3 is because the length of chain 8 is adjustable, so relative embodiment 1 and embodiment's 2 structure can realize length apart from transmission.
Above-described embodiment is preferred embodiment of the present invention; it is not the restriction to technical solution of the present invention; so long as the technological scheme that can realize on the basis of above-described embodiment without creative work all should be considered as falling within the scope of the rights protection of patent of the present invention.
Claims (10)
1. a rotating power is economized force transfering device, comprise power end gear and load end gear, it is characterized in that: also comprise lever and gear wheel, fulcrum gear and lever positioning wheel, described power end gear, described load end gear and described fulcrum gear are connected with described lever and gear wheel rotary drive respectively, and described fulcrum gear is between described power end gear and described load end gear and more near described load end gear; Described lever positioning wheel can rotate but can not move, and positions to be connected to make described lever and gear wheel position rotating between described lever positioning wheel and described lever and gear wheel.
2. rotating power according to claim 1 is economized force transfering device, it is characterized in that: described lever and gear wheel is provided with external tooth and central through bore, and described positioning wheel is realized and being located by connecting near being installed in the inwall circumference of described lever and gear wheel; Or described lever and gear wheel is provided with external tooth and central through bore, the inwall circumference of described lever and gear wheel is provided with circular groove, and the circumferential edges of described lever positioning wheel is placed in described circular groove and realizes and being located by connecting; Or described lever and gear wheel is provided with central through bore, the inwall circumference of described lever and gear wheel is provided with internal tooth, and described lever positioning wheel is located by connecting near outer realization of the outer wall circumference that is installed on described lever and gear wheel; Or described lever and gear wheel is provided with central through bore, the inwall circumference of described lever and gear wheel is provided with internal tooth, and the outer wall circumference of described lever and gear wheel is provided with outer groove, and the circumferential edges of described lever positioning wheel is placed in described outer groove and realizes and being located by connecting; Or described lever and gear wheel is connected with spacing section, outer wall circumference or the inwall circumference of described spacing section are provided with annular groove, and the circumferential edges of described lever positioning wheel is placed in described annular groove and realizes and being located by connecting.
3. rotating power according to claim 2 is economized force transfering device, it is characterized in that: described lever positioning wheel is two, is installed on respectively the position of answering with described power end gear and described load end gear mesh.
4. according to the rotating power described in claim 2 or 3, economize force transfering device, it is characterized in that: described power end gear, described load end gear and described fulcrum gear are directly connected with a joggle with described lever and gear wheel respectively.
5. rotating power according to claim 4 is economized force transfering device, it is characterized in that: in the sense of rotation of described lever and gear wheel, the described power end gear of take is starting point, and the described load end gear of take is terminal, form one section of camber line, described fulcrum gear is positioned between described camber line location.
6. rotating power according to claim 4 is economized force transfering device, it is characterized in that: the distance of establishing between described power end gear and described fulcrum gear is L1, distance between described load end gear and described fulcrum gear is L2, and L1 is not less than the twice of L2.
7. according to the rotating power described in claim 2 or 3, economize force transfering device, it is characterized in that: described transfer unit also comprises transition gear and chain, between described power end gear, described lever and gear wheel, described transition gear and described load end gear, by described chain, be connected with a joggle, described power end gear, described transition gear and described load end gear lay respectively at the outside of described lever and gear wheel.
8. rotating power according to claim 7 is economized force transfering device, it is characterized in that: described transfer unit also comprises press strip gear, described press strip gear is installed on the outside of described lever and gear wheel and near described press strip gear, and described press strip gear makes to form respectively engagement driving between described chain and described power end gear, described lever and gear wheel, described transition gear, described load end gear.
9. rotating power according to claim 7 is economized force transfering device, it is characterized in that: described lever and gear wheel is provided with external tooth and central through bore, the inwall circumference of described lever and gear wheel is provided with circular groove, traversing carriage arm is also installed in the central through bore of described lever and gear wheel, the first end of described traversing carriage arm is installed on the position of close central point in described lever and gear wheel, the second end of described traversing carriage arm is provided with mobile fulcrum wheel, the circumferential edges of described mobile fulcrum wheel is placed in described circular groove, the first end of described traversing carriage arm is connected with the elastic strip for resetting.
10. rotating power according to claim 7 is economized force transfering device, it is characterized in that: in described transition gear, be provided with central through bore, the inwall circumference of described transition gear is provided with annular spacing groove, transition positioning wheel is installed in the central through bore of described transition gear, the circumferential edges of described transition positioning wheel is placed in described annular spacing groove, on described transition positioning wheel, is also provided with and makes described transition gear away from the spring of described lever and gear wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410212786.3A CN104019188A (en) | 2014-05-20 | 2014-05-20 | Labor-saving rotary power transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410212786.3A CN104019188A (en) | 2014-05-20 | 2014-05-20 | Labor-saving rotary power transmission device |
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| Publication Number | Publication Date |
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| CN104019188A true CN104019188A (en) | 2014-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410212786.3A Pending CN104019188A (en) | 2014-05-20 | 2014-05-20 | Labor-saving rotary power transmission device |
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| CN (1) | CN104019188A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987129A (en) * | 2015-01-29 | 2016-10-05 | 杨小全 | Speed-regulation labor-saving system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2040563U (en) * | 1988-12-26 | 1989-07-05 | 刘岗林 | Lever type power transmission |
| CN2181594Y (en) * | 1993-07-10 | 1994-11-02 | 张树元 | Lever booster |
| CN1261132A (en) * | 2000-02-28 | 2000-07-26 | 涂圣寅 | Boosting machine |
| CN2888183Y (en) * | 2005-12-21 | 2007-04-11 | 余安生 | Lever type force amplifier |
| JP2009205749A (en) * | 2008-02-28 | 2009-09-10 | Fujitsu Ten Ltd | Disk playback device |
| CN203822957U (en) * | 2014-05-20 | 2014-09-10 | 宁湘均 | Rotary power labor-saving transmission device |
-
2014
- 2014-05-20 CN CN201410212786.3A patent/CN104019188A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2040563U (en) * | 1988-12-26 | 1989-07-05 | 刘岗林 | Lever type power transmission |
| CN2181594Y (en) * | 1993-07-10 | 1994-11-02 | 张树元 | Lever booster |
| CN1261132A (en) * | 2000-02-28 | 2000-07-26 | 涂圣寅 | Boosting machine |
| CN2888183Y (en) * | 2005-12-21 | 2007-04-11 | 余安生 | Lever type force amplifier |
| JP2009205749A (en) * | 2008-02-28 | 2009-09-10 | Fujitsu Ten Ltd | Disk playback device |
| CN203822957U (en) * | 2014-05-20 | 2014-09-10 | 宁湘均 | Rotary power labor-saving transmission device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987129A (en) * | 2015-01-29 | 2016-10-05 | 杨小全 | Speed-regulation labor-saving system |
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Application publication date: 20140903 |