CN2705442Y - Electric jack - Google Patents
Electric jack Download PDFInfo
- Publication number
- CN2705442Y CN2705442Y CN 200420019389 CN200420019389U CN2705442Y CN 2705442 Y CN2705442 Y CN 2705442Y CN 200420019389 CN200420019389 CN 200420019389 CN 200420019389 U CN200420019389 U CN 200420019389U CN 2705442 Y CN2705442 Y CN 2705442Y
- Authority
- CN
- China
- Prior art keywords
- screw rod
- gear
- clutch plate
- main gear
- jack
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a kind of electronic jack, especially relates to a kind of structural improvement of automobile-used screw rod type electric jack.It comprises motor, and planetary gear reducing mechanism and screw lifting mechanism are provided with the clutch plate that is connected with described maincenter screw rod at the inner chamber place of main gear one side, are provided with the moment transmission device between described main gear and clutch plate.Help guaranteeing electronic jack when run into jack stuck or when bearing load occasion such as excessive motor will do lost motion, make electronic jack device long service life.Therefore, the utility model is rational in infrastructure, and cost of manufacture is lower, and reliability is better; The screw rod wearing and tearing are little, long service life; When run into jack stuck or when bearing load occasion such as excessive motor will do lost motion, protected motor, thereby made that the overload protection device of motor is simple in structure, implement easily.
Description
Technical field
The utility model relates to a kind of electronic jack, especially relates to a kind of structural improvement of automobile-used screw rod type electric jack.
Background technology
In the prior art, be used for the jack that the vehicle top is lifted or promoted roughly can be divided into spiral jack, rack-type jack, pneumatic or fluid pressure type jack and electronic jack.The electronic jack of several of Ti Chuing is because its unique advantage has obtained application more and more widely in recent years.For example, (application number: 4609179) disclose a kind of electronic jack, the horsepower output of its drive motor is transferred to the lifting post by a plurality of power delivery gears to american documentation literature, makes it in movement in vertical direction.Since operation during jack the horsepower output of drive motor be not enough to push up effectively and lift or promote heavy-duty vehicle, therefore drive motor or the power delivery gear fracture that may meet accident in use.
In addition, Chinese patent literature has been announced a kind of electronic jack (application number: 01254907.X), electronic jack, by motor, speed reduction gearing, lifting mechanism is formed, speed reduction gearing is fixed on the housing, lifting mechanism is followed successively by the maincenter screw rod outward by the lining, middle screw rod and external screw rod and be screw thread fit, maincenter screw rod and middle screw rod top link together by notch and latch and spring, convex shoulder is all arranged inside and outside the external screw rod lower end, and overcoat is enclosed within on the external screw rod, and inner top side has convex shoulder, there is convex shoulder lower end, the outside, connect the top screw rod on the external screw rod, the lifting mechanism upper end is fixed by axle sleeve, and the lower end connects main gear by the maincenter screw rod, be fixed on the base plate behind the bearing; Speed reduction gearing is that planetary wheel is connected on the deceleration dish by axle, outer and external gear engagement, and the external gear internal tooth meshes the gear on output gear wheel seat lower end gear and the maincenter screw rod with the planetary wheel that is fixed on by axle on the output gear wheel seat again; The motor shaft connection gear and with the engagement of the planetary wheel of speed reduction gearing.This patent have laborsavingly save time, volume is little, portable advantage.But, when run into jack stuck or when bearing load occasion such as excessive motor burn because of load is excessive or motor overload protection device complicated, reliability is owed, the manufacturing cost height.
Summary of the invention
The utility model mainly be solve existing electronic jack when run into jack stuck or when bearing occasions such as load is excessive motor burn because of load is excessive or motor overload protection device complicated, the technical matters that reliability is owed etc.Provide a kind of rational in infrastructure, cost of manufacture is lower, the electronic preferably jack of reliability.
The utility model has been gone back solution existing in prior technology screw rod serious wear simultaneously, and service life is short, and rocking when the jack operation is easily caused in the gap of each screw rod caused the technical matters of the distortion, card tooth etc. of screw rod.
Above-mentioned technical matters of the present utility model is mainly solved by following technical proposals: a kind of electronic jack, it comprises motor, planetary gear reducing mechanism and screw lifting mechanism, wherein, described motor is fixed on the protective cover by mounting bracket, rotor shaft end gear at motor is connected on the deceleration dish through planetary wheel, and the external gear engagement of planetary wheel outside it through inner gear and with its ingear secondary planetary gear; Described secondary planetary gear is fixed on the output gear by axle, and described output gear is meshed with main gear through gear; And be provided with the clutch plate that is connected with described maincenter screw rod at the inner chamber place of described main gear one side, between described main gear and clutch plate, be provided with the moment transmission device.Help guaranteeing electronic jack when run into jack stuck or when bearing load occasion such as excessive motor will do lost motion, make electronic jack device long service life.
As preferably, described moment transmission device is: described clutch plate is provided with the hole of some radial arrangement, is provided with spring in it and places the steel ball of its outer end, and be provided with cave, corresponding location at the bulge loop inwall place of described main gear; Perhaps described clutch plate is provided with the hole of some radial arrangement, is provided with spring and the fixed leg that places its outer end in it, and its end is ball-crown body or similar curved body, and is provided with the cave, location of respective shapes at the bulge loop inwall place of described main gear; Or be the hole that described clutch plate is provided with some radial arrangement, be provided with spring and the fixed leg that places its outer end in it, V-shaped body in its end or U type body, and be provided with the cave, location of corresponding reverse V-shaped or inverted U at the bulge loop inwall place of described main gear.Stuck or when bearing load occasion such as excessive when electronic jack when running into jack, make clutch plate be separated compression spring in main gear, guarantee the safe handling of motor; Gear and be provided with jump ring and allied equipment between dish separates with clutch plate to prevent main gear, and the strong body of spring and steel ball or post is come off.
Certainly, described moment transmission device also can oppositely be provided with, concrete scheme can be: the bulge loop of described main gear is provided with the hole or the groove of some radial arrangement, be provided with spring and the steel ball or the dentation that place its outer end in it, and be provided with cave, corresponding location or positioning groove at the outer wall place of described clutch plate.
As preferably, described moment transmission device is 4 group to 8 group spring and steel ball or the column of radial equipartition between main gear and clutch plate, and its latter's diameter is 4mm～8mm.
As preferably, described screw lifting mechanism comprises middle screw rod, is provided with the maincenter screw rod that is meshed with it in middle screw rod, is provided with the external screw rod that is engaged with in the middle screw rod outside, and described external screw rod is provided with the top loop bar.The problem of rocking when the jack operation is easily caused in the gap that has solved each screw rod effectively, friction force reduces during work, operates steadily;
As preferably, be provided with a braking guiding plug screw that constitutes by coupling end and guide end in the loop bar of described top, and described coupling end is connected with the end of middle screw rod; The top of described maincenter screw rod is threaded with the employing of the end face of coupling end or the similar of other is connected.
As preferably, the external diameter of the guide end of described braking guiding plug screw is greater than the external diameter of middle screw rod; And with cooperating of inwall of top loop bar be running-fit; The end face of described middle screw rod is curved, and its axle center becomes point to contact with the end face of braking guiding plug screw.The point contact can effectively reduce friction force therebetween, improves the work efficiency of jack greatly.
Therefore, the utlity model has 1, rational in infrastructure, cost of manufacture is lower, and reliability is better; 2, the screw rod wearing and tearing are little, long service life; 3, when run into jack stuck or when bearing load occasion such as excessive motor will do lost motion, protected motor, thus characteristics such as the overload protection device of motor is simpler.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the present utility model.
The specific embodiment
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment 1: motor 18 is fixed on the protective cover 19 by mounting bracket, be connected on the deceleration dish through planetary wheel at the rotor shaft end gear of motor 18, and the external gear engagement of planetary wheel outside it through inner gear and with its ingear secondary planetary gear 21.Secondary planetary gear 21 is fixed on the output gear 1 by axle, and described output gear 1 is meshed with main gear 2 through gear; And be provided with the clutch plate 4 that is connected with described maincenter screw rod 3 at the inner chamber place of described main gear 2 one sides, between described main gear 2 and clutch plate 4, be provided with the moment transmission device.Described moment transmission device is: described clutch plate 4 is provided with the hole 5 of radial arrangement, be provided with spring 6 and the steel ball 7 that places its outer end in it, the diameter of steel ball is 6mm, and be provided with cave, corresponding location 8 at the bulge loop inwall place of described main gear 2, the surface of cave, described location 8 shapes and described steel ball 7 adapts, 8 places, cave, location at clutch plate 4 upper surfaces are provided with dust collar 20, prevent that dust from entering in the cave 8, location, influences the normal operation of spring 6 and steel ball 7.Be evenly equipped with six groups of moment transmission devices at main gear 2 and 4 of clutch plates.
In middle screw rod 13, be provided with the maincenter screw rod 3 that is meshed with it, be provided with the external screw rod 16 that is engaged with in middle screw rod 13 outsides, external screw rod 16 is provided with top loop bar 9, and described top loop bar 9 is interior by the braking guiding plug screw 12 that is made of coupling end 10 and guide end 11 that is threaded.And the end of maincenter screw rod 3 is made as arc, is that point contacts with the end face of described coupling end 10.The external diameter of the guide end 11 of braking guiding plug screw 12 which is provided with degree of tightness groove 17 greater than the external diameter of middle screw rod 13; And with cooperating of inwall of top loop bar 9 be running-fit.The top of maincenter screw rod 3 is provided with interior guide end 15, and its external diameter is greater than the middle screw rod external diameter, and with cooperating of inwall of middle screw rod 13 be running-fit.
During use, by secondary planetary gear the horsepower output of motor is passed to output gear 1, output gear 1 is passed to main gear 2 by gear with horsepower output.Main gear 2 drives clutch plate 4 by the moment transmission device and rotates, thereby makes maincenter screw rod 14 rotate.Because varying in size of load, according to the friction force size between each screw rod, the rising order of screw rod is different.General under the less situation of load, maincenter screw rod 14 is earlier with middle screw rod 13 jack-up, and the jack-up external screw rod 16 then.Braking guiding plug screw 12 plays the brake action of guiding and screw rod in the course of the work.When the load of jack was bigger, when the rotating torque that clutch plate 4 and main gear are 2 reached certain value, positioning unit was subjected to bigger axle pressure, with spring application.Like this, clutch plate no longer is subjected to application force, and jack stops to rise; Make motor be in light condition, effectively avoided adverse consequencess such as burn-down of electric motor.
Embodiment 2: change the firm ball 7 among the embodiment 1 into fixed leg, the end of fixed leg is ball-crown body or similar curved body, and the surface that the end of cave, described location 8 shapes and fixed leg is ball-crown body or similar curved body adapts.Remaining is with embodiment 1.
Embodiment 3: change the firm ball 7 among the embodiment 1 into fixed leg, and V-shaped body in the end of fixed leg or U type body, the V-shaped body in end of cave, described location 8 shapes and fixed leg or the surface of U type body adapt.Remaining is with embodiment 1.
Embodiment 4: the moment transmission device among the embodiment 1 is changed into: the bulge loop of described main gear 2 is provided with the hole 5 of radial arrangement, be provided with spring 6 and the steel ball 7 that places its outer end in it, and being provided with cave, corresponding location 8 at the outer wall place of described clutch plate 4, the surface of cave, described location 8 shapes and described steel ball 7 adapts.Remaining is with embodiment 1.
Embodiment 5: change the firm ball 7 among the embodiment 4 into fixed leg, the end of fixed leg is ball-crown body or similar curved body, and the surface that the end of cave, described location 8 shapes and fixed leg is ball-crown body or similar curved body adapts.Remaining is with embodiment 4.
Embodiment 6: change the firm ball 7 among the embodiment 4 into fixed leg, and V-shaped body in the end of fixed leg or U type body, the V-shaped body in end of cave, described location 8 shapes and fixed leg or the surface of U type body adapt.Remaining is with embodiment 4.
Claims (10)
1. electronic jack, comprise motor, planetary gear reducing mechanism and screw lifting mechanism, wherein, described motor is fixed on the protective cover by mounting bracket, rotor shaft end gear at motor is connected on the deceleration dish through planetary wheel, and the external gear engagement of planetary wheel outside it through inner gear and with its ingear secondary planetary gear; Described secondary planetary gear is fixed on the output gear by axle, it is characterized in that: described output gear (1) is meshed with main gear (2) through gear; And be provided with the clutch plate (4) that is connected with described maincenter screw rod (3) at the inner chamber place of described main gear (2) one sides, between described main gear (2) and clutch plate (4), be provided with the moment transmission device.
2. electronic jack according to claim 1, it is characterized in that described moment transmission device is: described clutch plate (4) is provided with the hole (5) of some radial arrangement, be provided with spring (6) in it and place the steel ball (7) of its outer end, and be provided with cave, corresponding location (8) at the bulge loop inwall place of described main gear (2).
3. electronic jack according to claim 1, it is characterized in that described moment transmission device is: described clutch plate (4) is provided with the hole (5) of some radial arrangement, be provided with spring (6) in it and place the fixed leg of its outer end, its end is ball-crown body or similar curved body, and is provided with the cave, location (8) of respective shapes at the bulge loop inwall place of described main gear (2).
4. electronic jack according to claim 1, it is characterized in that described moment transmission device is: described clutch plate (4) is provided with the hole (5) of some radial arrangement, be provided with spring (6) in it and place the fixed leg of its outer end, V-shaped body in its end or U type body, and be provided with the cave, location (8) of corresponding reverse V-shaped or inverted U at the bulge loop inwall place of described main gear (2).
5. electronic jack according to claim 1, it is characterized in that described moment transmission device is: the bulge loop of described main gear (2) is provided with the hole (5) of some radial arrangement, be provided with spring (6) in it and place the steel ball (7) of its outer end, and be provided with cave, corresponding location (8) at the outer wall place of described clutch plate (4).
6. according to claim 1 or 2 or 3 or 4 or 5 described electronic jacks, it is characterized in that described moment transmission device is 4 group to 8 group springs (6) and steel ball (7) or the column of radial equipartition between main gear (2) and clutch plate (4), its latter's diameter is 4mm～8mm.
7. according to claim 1 or 2 or 3 or 4 or 5 described electronic jacks, it is characterized in that described screw lifting mechanism comprises middle screw rod (13), in middle screw rod (13), be provided with the maincenter screw rod (3) that is meshed with it, be provided with the external screw rod (16) that is engaged with in middle screw rod (13) outside, described external screw rod (16) is provided with top loop bar (9).
8. according to claim 1 or 2 or 3 or 4 or 5 described electronic jacks, it is characterized in that in described top loop bar (9), being provided with a braking guiding plug screw (12) that constitutes by coupling end (10) and guide end (11), and described coupling end (10) is connected with the end of middle screw rod (13); The top of described middle screw rod (3) is adopted with the end face of coupling end (10) and is threaded.
9. electronic jack according to claim 7, it is characterized in that in described top loop bar (9), being provided with a braking guiding plug screw (12) that constitutes by coupling end (10) and guide end (11), and described coupling end (10) is connected with the end of middle screw rod (13); The top of described maincenter screw rod (3) is adopted with the end face of coupling end (10) and is threaded.
10. according to claim 1 or 2 or 3 or 4 or 5 or 9 described electronic jacks, it is characterized in that at the external diameter of the guide end (11) of described braking guiding plug screw (12) external diameter greater than middle screw rod (13); And with cooperating of inwall of top loop bar (9) be running-fit; The end face of described maincenter screw rod (3) is curved, and its axle center becomes point to contact with the end face of braking guiding plug screw (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420019389 CN2705442Y (en) | 2004-01-09 | 2004-01-09 | Electric jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420019389 CN2705442Y (en) | 2004-01-09 | 2004-01-09 | Electric jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2705442Y true CN2705442Y (en) | 2005-06-22 |
Family
ID=34848999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420019389 Expired - Fee Related CN2705442Y (en) | 2004-01-09 | 2004-01-09 | Electric jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2705442Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105883663A (en) * | 2016-05-23 | 2016-08-24 | 安徽科技学院 | Gear transmission jack |
| CN109231060A (en) * | 2018-11-05 | 2019-01-18 | 兰州万里航空机电有限责任公司 | Can two-stage lifting mechanic jacks |
-
2004
- 2004-01-09 CN CN 200420019389 patent/CN2705442Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105883663A (en) * | 2016-05-23 | 2016-08-24 | 安徽科技学院 | Gear transmission jack |
| CN105883663B (en) * | 2016-05-23 | 2019-02-12 | 安徽科技学院 | A kind of gear drive jack |
| CN109231060A (en) * | 2018-11-05 | 2019-01-18 | 兰州万里航空机电有限责任公司 | Can two-stage lifting mechanic jacks |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |