CN203310605U

CN203310605U - Lifting mechanism

Info

Publication number: CN203310605U
Application number: CN2013203688508U
Authority: CN
Inventors: 刘晓伟; 秦永明
Original assignee: China Academy of Aerospace Aerodynamics CAAA
Current assignee: China Academy of Aerospace Aerodynamics CAAA
Priority date: 2013-06-25
Filing date: 2013-06-25
Publication date: 2013-11-27
Anticipated expiration: 2023-06-25

Abstract

Provided is a lifting mechanism. The lifting mechanism comprises a trapezoid leading screw, a worm gear shaft, tapered roller bearings, a bearing connecting seat, a shaft sleeve, an installation platform, a bearing cap, a clamping ring, a guide sleeve, keys and a lifting rod. The lifting mechanism provided by the utility model is capable of meeting the test requirements of subsonic, transonic and supersonic wind tunnels, the size is small, the height is low, the obstruction degree is low, and the normal establishment of a flow field is free of influences; the lifting mechanism has a self-locking function and is capable of bearing the forces and moments generated in tests; and the lifting mechanism is convenient and fast to install and use, the test preparation time is reduced, the test efficiency is improved, and the labor intensity is reduced.

Description

A kind of hoisting gear

Technical field

The utility model relates to a kind of hoisting gear, belongs to the experimental aerodynamics field.

Background technology

Inferior in super wind-tunnel, needing the equipment of the work that promotes, parts a lot, such as adjustment sheet that expands angle lifting gear, ultra-expanded section of test section etc., hydraulic-driven or the motorized motions of adopting more, but the main part of these lifting gears, mechanism is all to be fixedly mounted in wind-tunnel, and bulky driving running part all is arranged on outside wind-tunnel, to avoid being placed in wind-tunnel, increase congestion degree, affect flow field and set up.

Along with large-scale, newly make and inferior across super wind-tunnel, come into operation gradually, a lot of equipment, parts are all made can be according to the test needs, install or shift out wind-tunnel, therefore the wind-tunnel housing need to often separate with these equipment, parts, consider security, operability and test efficiency, before can not be similar, partly be arranged on lifting gear (mechanism) large volume outside wind-tunnel, only main part is in wind-tunnel, a kind of volume of need design is little, congestion degree is little, can bear various aerodynamic loadings, is directly installed on the hoisting gear in wind-tunnel.

The utility model content

The purpose of this utility model: overcome the deficiencies in the prior art, a kind of hoisting gear is provided, volume is little, congestion degree is little, is arranged in wind-tunnel and does not affect flow field foundation, and carrying is large, but self-locking, make Asia convenient, quick across the lifting work in super wind tunnel test, effectively raises the efficiency.

Technical solution of the present utility model:

A kind of hoisting gear comprises: trapezoidal screw, worm-wheel shaft, the first taper roll bearing, bearing Connection Block, axle sleeve, mounting platform, bearing cap, hold-down ring, guide pin bushing, key, elevating lever and the second taper roll bearing;

Between bearing Connection Block and worm-wheel shaft, support by the first taper roll bearing and the second taper roll bearing, bearing Connection Block, worm-wheel shaft and two taper roll bearings link together; Axle sleeve is enclosed within on worm-wheel shaft and between two taper roll bearings, worm-wheel shaft and axle sleeve coordinate to realize the axial location to the first taper roll bearing, hold-down ring withstands on the inner ring of the second taper roll bearing, axle sleeve and hold-down ring coordinate to realize the axial location to the second taper roll bearing, bearing cap withstands the outer ring of the second taper roll bearing, realize axial pretightening, bearing cap is fixedly connected with the bearing Connection Block, and bearing Connection Block and mounting platform link together;

The center of described worm-wheel shaft has tapped through hole vertically, and trapezoidal screw passes the tapped through hole of worm-wheel shaft, is joined together to form worm drive by screw-threaded engagement, and the part that trapezoidal screw passes described tapped through hole is fixed together with elevating lever.

Guide pin bushing is arranged on below mounting platform and with mounting platform and is connected, and guide pin bushing and elevating lever form and be slidably matched.

Two keys are fixed in the keyway on elevating lever, and the part on outstanding elevating lever surface is positioned at the keyway of guide pin bushing, the circular motion of restriction elevating lever.

The first taper roll bearing and the second taper roll bearing adopt face-to-face mode to install.

Described two keys are symmetric along the central axis of elevating lever.

The utlity model has following beneficial effect:

(1) the utility model hoisting gear volume is little, is arranged in wind-tunnel, highly low, and the wind-tunnel congestion degree is little, does not affect the normal foundation in flow field.

(2) the utility model has designed the standard round taper roller bearing of a pair of high precision, large load on worm-wheel shaft supports, and adopts face-to-face mode to install, and facilitates installation and removal, can bear the force and moment acted in mechanism.

(3) the utility model is simple in structure, installs, convenient disassembly, can external motor or handwheel drive, flexible and convenient to use, effectively reduced test setup time, improved test efficiency, reduced labour intensity.

(4) the utility model adopts trapezoidal screw to carry out transmission, and the threads of lead screw lift angle of design is less than equivalent friction angle, can self-locking.

The accompanying drawing explanation:

Fig. 1 is the structural representation of a kind of hoisting gear of the utility model;

Embodiment:

As shown in Figure 1, the utility model provides a kind of hoisting gear, comprising: trapezoidal screw 1, worm-wheel shaft 2, the first taper roll bearing 3, bearing Connection Block 4, axle sleeve 5, mounting platform 6, bearing cap 7, hold-down ring 8, guide pin bushing 9, key 10, elevating lever 11 and the second taper roll bearing 12;

Between bearing Connection Block 4 and worm-wheel shaft 2, support by the first taper roll bearing 3 and the second taper roll bearing 12, bearing Connection Block 4, worm-wheel shaft 2 and two taper roll bearings link together; Axle sleeve 5 is enclosed within on worm-wheel shaft 2 and between two taper roll bearings, worm-wheel shaft 2 and axle sleeve 5 coordinate to realize the axial location to the first taper roll bearing 3, hold-down ring 8 withstands on the inner ring of the second taper roll bearing 12, axle sleeve 5 and hold-down ring 8 coordinate to realize the axial location to the second taper roll bearing 12, bearing cap 7 withstands the outer ring of the second taper roll bearing 12, realize axial pretightening, bearing cap 7 is fixedly connected with bearing Connection Block 4, and bearing Connection Block 4 links together with mounting platform 6; The first taper roll bearing 3 and the second taper roll bearing 12 adopt face-to-face mode to install.

The center of described worm-wheel shaft 2 has tapped through hole vertically, trapezoidal screw 1 passes the tapped through hole of worm-wheel shaft 2, by screw-threaded engagement, be joined together to form worm drive, the part that trapezoidal screw 1 passes described tapped through hole is fixed together with elevating lever 11

Guide pin bushing 9 is arranged on below mounting platform 6 and is connected with mounting platform 6, and guide pin bushing 9 forms and is slidably matched with elevating lever 11.Two keys 10 are fixed in the keyway on elevating lever 11, and the part on outstanding elevating lever 11 surfaces is positioned at the keyway of guide pin bushing 9, the circular motion of restriction elevating lever 11.Two keys 10 are symmetric along the central axis of elevating lever 11.

During the utility model work, worm screw and two end supports platform need be arranged on the mounting platform 6 in wind-tunnel, make worm-wheel shaft 2 and worm mesh together, can use motor as driving, also can select handwheel by manually driving.External driving force is ordered about the worm screw rotation, worm screw drives worm-wheel shaft 2 rotations, worm-wheel shaft 2 forms worm drive with trapezoidal screw 1 engagement, and the elevating lever 11 be threaded connection with trapezoidal screw 1, interior by pair of keys 10 restriction circular motion at guide pin bushing 9, so trapezoidal screw 1 drive elevating lever 11 is done straight line upper and lower displacement campaign.In the utility model, trapezoidal screw 1 can be realized self-locking.

Through actual use test, the utility model embodiment can meet inferior test demand across super wind-tunnel, and volume is little, and highly low, congestion degree is little, does not affect the normal foundation in flow field; The energy self-locking, can bear the wind tunnel produced in test; Install, easy to use, quick, effectively reduced test setup time, improved test efficiency, reduced labour intensity.

Claims

1. a hoisting gear, is characterized in that comprising: trapezoidal screw (1), worm-wheel shaft (2), the first taper roll bearing (3), bearing Connection Block (4), axle sleeve (5), mounting platform (6), bearing cap (7), hold-down ring (8), guide pin bushing (9), key (10), elevating lever (11) and the second taper roll bearing (12);

Between bearing Connection Block (4) and worm-wheel shaft (2), support by the first taper roll bearing (3) and the second taper roll bearing (12), bearing Connection Block (4), worm-wheel shaft (2) and two taper roll bearings link together, axle sleeve (5) is enclosed within on worm-wheel shaft (2) and between two taper roll bearings, worm-wheel shaft (2) and axle sleeve (5) coordinate to realize the axial location to the first taper roll bearing (3), hold-down ring (8) withstands on the inner ring of the second taper roll bearing (12), axle sleeve (5) and hold-down ring (8) coordinate to realize the axial location to the second taper roll bearing (12), bearing cap (7) withstands the outer ring of the second taper roll bearing (12), realize axial pretightening, bearing cap (7) is fixedly connected with bearing Connection Block (4), bearing Connection Block (4) links together with mounting platform (6),

The center of described worm-wheel shaft (2) has tapped through hole vertically, trapezoidal screw (1) passes the tapped through hole of worm-wheel shaft (2), by screw-threaded engagement, be joined together to form worm drive, the part that trapezoidal screw (1) passes described tapped through hole is fixed together with elevating lever (11)

Guide pin bushing (9) is arranged on below mounting platform (6) and is connected with mounting platform (6), and guide pin bushing (9) forms and is slidably matched with elevating lever (11).

2. a kind of hoisting gear according to claim 1, it is characterized in that: two keys (10) are fixed in the keyway on elevating lever (11), and the part on outstanding elevating lever (11) surface is positioned at the keyway of guide pin bushing (9), the circular motion of restriction elevating lever (11).

3. a kind of hoisting gear according to claim 1 is characterized in that: the first taper roll bearing (3) and the second taper roll bearing (12) adopt face-to-face mode to install.

4. a kind of hoisting gear according to claim 2, it is characterized in that: described two keys (10) are symmetric along the central axis of elevating lever (11).