Automobile maintenance lifting platform
Technical field
The present invention relates to a kind of automobile maintenance lifting platform.
Background technology
When servicing a car, parts such as automobile chassis transmission case, backteeth bag transmission shaft are in automobile bottom specific position, and very difficult hand is pickaback lifted, and adopt special tool to operate.Mainly be to adopt a plurality of portable jacks as service tools at present, and the height of jack has certain restriction, or extreme lower position is too high, turnover car bottom is inconvenient, or the extreme higher position is too low can't to reach normal dismounting height.Use several jack adjustable heights to be difficult to be consistent in addition simultaneously, can't guarantee to treat the stability and the accuracy of removable member, maintenance is wasted time and energy, inefficiency, poor stability.
Summary of the invention
In order to overcome the shortcoming that prior art exists, the purpose of this invention is to provide a kind of simple in structure, easy to operate, automobile maintenance lifting platform that safety performance is good.
In order to achieve the above object, the technical solution used in the present invention is as follows: a kind of automobile maintenance lifting platform, it comprises pallet and the underframe of shelving car chassis, described underframe is a rectangular frame, mainly by sleeve, expansion link, the front and back pipe link, driving gear, driven gear and gear wheel shaft are formed, driving gear is installed on the gear wheel shaft, driven gear and driving gear engagement, expansion link inserts in the sleeve and is assemblied on the driven gear, the expansion link rear is that leading screw and sleeve are flexible with screw thread fit, front rod links to each other with the expansion link of both sides, rear connecting rod links to each other with the sleeve of both sides, the two ends of front and back pipe link all are connected with strut bar, and two strut bars are hinged by the pallet of axle sleeve and homonymy.
Among the present invention, be fixed with outer tube on the expansion link of underframe one side, and be fixed with registration arm on the sleeve that described expansion link cooperates, registration arm is inserted in the outer tube, registration arm is provided with pin-and-hole in the position of plug-in mounting mutually with outer tube, and both can be by the locating dowel pin location of installing in the pin-and-hole; The front end of described expansion link is equipped with cardan wheel.
The present invention is by handle or motor driven gear axle cw or left-hand revolution, and driving gear drives driven gear and rotates, thereby makes the expansion link that is assemblied on the driven gear produce fore and aft motion with respect to sleeve.When expansion link extended outside sleeve, the pivotally attached strut bar drove pallet and descends; When expansion link in sleeve during retraction, the pivotally attached strut bar drives pallet and rises.The present invention can drive the lifting of pallet by retractable underframe, and is simple in structure, easy to operate; The front end of expansion link is equipped with cardan wheel, and is capable of expansion and contraction during the expansion link action, and good reliability can push this crane or pull out simultaneously the automobile bottom easily; Crane one side is provided with outer tube and registration arm,, can prevent between sleeve and the expansion link slippage to take place with registration arm and outer tube location by locating dowel pin, guarantee that pallet is stable at a height, further improved reliability of the present invention when servicing a car, its safety performance is good.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the scheme drawing of running part among the present invention.
The specific embodiment
A kind of automobile maintenance lifting platform shown in Fig. 1,2, it comprises underframe that fore and aft motion can take place and by the pallet 10 of they sup-port, pallet 10 can rise and descend under the drive of strut bar 8, and pallet 10 is used to shelve car chassis.Underframe mainly is made up of gear wheel shaft 1, driving gear 2, driven gear 3, sleeve 5, expansion link 4 and forward and backward pipe link.Underframe is a rectangular frame, and its left and right both sides are that expansion link 4 is inserted in the sleeve 5, and the both sides, front and back are respectively front rod 6 and rear connecting rod 7, and front rod 6 links to each other with the expansion link 4 of both sides, and rear connecting rod 7 links to each other with the sleeve 5 of both sides.Driving gear 2 is assemblied on the gear wheel shaft 1, driving gear 2 and driven gear 3 engagements, and expansion link 4 inserts in the sleeve 5 and is installed on the driven gear 3, and expansion link 4 rears are that leading screw and sleeve 5 are flexible with screw thread fit.The front end of expansion link 4 is equipped with cardan wheel 15.Before and after the two ends of pipe link all link to each other with strut bar 8, be hinged by axle sleeve 9 with two strut bars 8 and the pallet 10 of side.The expansion link 4 that the strut bar that links to each other with front rod 6 among Fig. 1 is positioned at its top blocks and can't see.In order to increase the intensity of crane, also be connected with cross bar 16 between two relative expansion links 4, the sleeve 5.
Be fixed with outer tube 11 on the expansion link 4 of underframe one side, with be fixed with registration arm 12 on the sleeve 5 that described expansion link 4 cooperates, registration arm 12 is inserted in the outer tube 11, and registration arm 12 is provided with pin-and-hole 13 in the position of plug-in mounting mutually with outer tube 11, and both can be by locating dowel pin 14 location of installing in the pin-and-hole 13.