CN202370992U - High-load joint bearing for spacecraft - Google Patents

Abstract

The utility model relates to a high-load knuckle bearing for a spacecraft. The knuckle bearing mainly comprises a ball socket, a ball head and a ball seat, wherein the ball socket and the ball seat form an outer ring of the knuckle bearing; the ball seat is located in a lower region in the middle of the ball socket and is in thread connection with the ball socket; the ball head forms an inner ring of the knuckle bearing, one end of the ball head is provided with a bolt and the other end of the ball head is ball head shaped; a transition fillet is arranged at the joint of the ball head shaped end and the bolt end; the ball head shaped end is matched with the ball surfaces inside the ball socket and the ball seat; the ball socket provides an integral type circumferential angular contact ball surface for the ball head; the ball seat provides a bottom angular contact ball surface for the ball head; a hole is formed at the upper part of the ball socket; the diameter of the hole is greater than that of the outer profile of the bolt end of the ball head; and a chamfer is formed on the inner edge of the hole. The knuckle bearing has the advantages of simple structure, wide range of tilting angle, conveniences for assembly and pre-tightening, and better bearing capability in both radial and axial directions.

Description

A kind of astrovehicle is used the high-mechanic joint shaft bearing

Technical field

The utility model relates to a kind of astrovehicle and uses the high-mechanic joint shaft bearing.

Background technique

Bearing is relatively to play the parts of support or guiding function in the location of other part through movement parts in the mechanism.Sliding bearing is the bearing that only produces sliding friction.Joint shaft bearing is meant that the sliding contact surface is sphere, mainly is applicable to the sliding bearing of oscillating motion, banking motion and low-speed rotation.

Joint shaft bearing mainly is made up of inner ring and outer ring, and inner ring outer surface and inner surface are for cooperating sphere.Joint shaft bearing comprehensively is divided into: plain radial bearing, angular contact articulated bearing, thrust articulated bearing and spherical plain bearing rod end by its direction, nominal contact angle and structural type that can bear load.Wherein, plain radial bearing is suitable for bearing radial load, also can bear little thrust load simultaneously; Angular contact articulated bearing is suitable for bearing the connected load that radial load and thrust load act on simultaneously; Thrust articulated bearing is suitable for bearing thrust load; Spherical plain bearing rod end is because the restriction of structural type, is suitable for bearing radial load and arbitrary direction is less than or equal to the thrust load of 0.2 times of radial load, or only can bear the constant radial load of direction.The bearing capacity of angular contact articulated bearing is better, but its tilt angle is little, or bearing capacity is lost when limit tilt angle, can't satisfy in the astrovehicle mechanism than the large inclined angle motion requirement.

Joint shaft bearing can be divided into again by the structure of its outer ring: integral outer ring's joint shaft bearing, single seam outer ring joint shaft bearing, double slit outer ring (subdivision outer ring) joint shaft bearing and double semi outer rings joint shaft bearing.Comparatively speaking, integral outer ring's joint shaft bearing is better than the joint shaft bearing bearing capacity of other three kinds of forms, but still can't satisfy three-dimensional HI high impact carrying demand in the astrovehicle, like the landing shock load of landing seeker.

Joint shaft bearing term and classification can be referring to " GB/T 3944-2002 joint shaft bearing vocabulary " and " classification of GB/T304.1-2002 joint shaft bearing ".

Summary of the invention

For overcoming the deficiency of existing technology, the purpose of the utility model is to provide a kind of astrovehicle to use the high-mechanic joint shaft bearing, and said joint shaft bearing is simple in structure, tilt angle ranges is wide, assembling and pretension convenient and radial and axially all possess better bearing capacity.

The purpose of the utility model realizes through following technological means.

A kind of astrovehicle is used the high-mechanic joint shaft bearing, and said joint shaft bearing mainly is made up of ball-and-socket, bulb and ball seat.Ball-and-socket and ball seat are formed the outer ring of said joint shaft bearing, and ball seat is positioned at the middle lower portion zone of ball-and-socket, and ball-and-socket and ball seat are through being threaded.Bulb is the inner ring of joint shaft bearing, and an end is a bolt, and an end is a bulb-type; Bulb-type end and bolt end connection part are provided with knuckle, and the bulb-type end matches with the inboard sphere of ball-and-socket and ball seat, and ball-and-socket is that bulb provides integrated circumferential angle contacting sphere, and ball seat is that bulb provides bottom corner contact sphere.The perforate of ball-and-socket top, aperture are greater than the gabarit of ball stud end, and the hole inner edge has chamfering.

The allowable angle of inclination α of said joint shaft bearing _MaxConfirm by following formula:

${\mathrm{\α}}_{\max }=\arccos \frac{2L}{D}-\arcsin \frac{d}{D};$

Wherein, the centre of sphere of L---said joint shaft bearing angle contacting sphere is distance to the ball-and-socket upper-end surface, d---the diameter of ball stud end, D---said joint shaft bearing angle contacting sphere diameter.

Wherein, preferably the spanner holding position is set at the bolt end of bulb; The bulb center is provided with lightening hole; Between the inboard sphere of ball-and-socket and the bulb-type end of bulb shear pin is set; The ball-and-socket exterior lateral area is provided with adpting flange; The inboard sphere of ball-and-socket and ball seat applies teflon fabric, molybdenum disulfide or selects for use self lubricating material to be lubricated.

The bolt end of bulb is that a connected element of said joint shaft bearing provides mechanical interface, and adpting flange is that another connected element of said joint shaft bearing provides mechanical interface.

Adpting flange can be adjusted according to the link position and the installing space of said joint shaft bearing to the distance H of ball-and-socket lower end surface.The thickness of ball-and-socket inside ball face portion is big more, and the radially bearing capacity of said joint shaft bearing is good more.

The shear strength of shear pin confirms that principle is following: the first, and can not destroy at the strictest dynamics load-up condition down cut pin of the improper motion state of said joint shaft bearing, and leave safe clearance; The second, can be cut off at the least action load-up condition down cut pin of said joint shaft bearing proper motion state.

When said joint shaft bearing assembles, earlier the bottom of bulb from ball-and-socket passed, again ball seat is threaded with ball-and-socket, said joint shaft bearing is carried out pretension through the screw-down torque that is threaded; Further ball-and-socket is fixedly connected with the bulb ball through shear pin.

The bearing capacity of the said joint shaft bearing of the utility model can be verified through static analysis and static test.The adpting flange of ball-and-socket is propped up admittedly, in the bolt end loading of bulb.Loading condition is divided into three kinds: deviate from the tension load of the bulb centre of sphere, when compressive load and the tilt angle of pointing to the bulb centre of sphere is 0 ° along the load of ball head collimation method line direction.

Beneficial effect

1. a kind of astrovehicle of providing of the utility model is used the high-mechanic joint shaft bearing, and said joint shaft bearing is simple in structure, tilt angle ranges is wide, assembling and pretension are convenient and radial and axial all possesses better bearing capacity;

2. a kind of astrovehicle of providing of the utility model is used the high-mechanic joint shaft bearing; Mainly bear radial load by ball-and-socket; Bear thrust load by ball seat, when effectively improving its all directions bearing capacity, the tilt angle of having realized relative broad range through the perforate of ball-and-socket top;

3. a kind of astrovehicle of providing of the utility model is used the high-mechanic joint shaft bearing, and the bolt end of bulb and adpting flange are that the connected element of said joint shaft bearing provides mechanical interface;

4. a kind of astrovehicle of providing of the utility model is used the high-mechanic joint shaft bearing, at bolt end the spanner holding position can be set, use convenient for assembly;

5. a kind of astrovehicle of providing of the utility model is used the high-mechanic joint shaft bearing, can between ball-and-socket and bulb, shear pin be set, and further ball-and-socket is fixedly connected with the bulb ball;

6. a kind of astrovehicle of providing of the utility model is used the high-mechanic joint shaft bearing, and under the condition that satisfies the working strength requirement, the bulb center can be provided with lightening hole with weight reduction.

Description of drawings

Fig. 1 is the longitudinal section organigram of a kind of astrovehicle of embodiment with the high-mechanic joint shaft bearing.

Wherein: 1-ball-and-socket, 2-bulb, 3-ball seat, 4-lightening hole, 5-adpting flange, 6-shear pin.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is elaborated.

Embodiment

As shown in Figure 1, a kind of astrovehicle is used the high-mechanic joint shaft bearing, and said joint shaft bearing mainly is made up of ball-and-socket 1, bulb 2 and ball seat 3.The outer ring of ball-and-socket 1 and the said joint shaft bearing of ball seat 3 compositions, ball seat 3 is positioned at the middle lower portion zone of ball-and-socket 1, and ball-and-socket 1 and ball seat 3 are through being threaded.Bulb 2 is the inner ring of joint shaft bearing, and an end is a bolt, and an end is a bulb-type; Bolt end is provided with protruding spanner holding position; Bulb-type end and bolt end connection part are provided with knuckle; The bulb-type end matches with the inboard sphere of ball-and-socket 1 and ball seat 3; Be provided with shear pin 6 between the inboard sphere of ball-and-socket 1 and the bulb-type end of bulb 2, bulb 2 centers are equipped with lightening hole 4 along axial direction, and ball-and-socket 1 provides integrated circumferential angle contacting sphere for bulb 2; Ball seat 3 provides bottom corner contact sphere for bulb 2.Said ball-and-socket 1 top perforate, the aperture is greater than the gabarit of bulb 2 bolt ends, and the hole inner edge has chamfering; Ball-and-socket 1 exterior lateral area is fixedly connected with adpting flange 5.The bolt end of bulb 2 is that a connected element of said joint shaft bearing provides mechanical interface, and adpting flange 5 provides mechanical interface for another connected element of said joint shaft bearing.

Said joint shaft bearing applies one deck teflon fabric at ball-and-socket 1 with ball seat 3 inboard spheres and is lubricated.

The allowable angle of inclination α of said joint shaft bearing _MaxConfirm by following formula:

${\mathrm{\α}}_{\max }=\arccos \frac{2L}{D}-\arcsin \frac{d}{D};$

Wherein, the centre of sphere of L---said joint shaft bearing angle contacting sphere is to ball-and-socket 1 upper-end surface distance, the diameter of d---bulb 2 bolt ends, D---said joint shaft bearing angle contacting sphere diameter.

During assembling, earlier the bottom of bulb 2 from ball-and-socket 1 passed, again ball seat 3 is threaded with ball-and-socket 1, said joint shaft bearing is carried out pretension through the said screw-down torque that is threaded; And through shear pin 6 ball-and-socket 1 sphere is fixedly connected with bulb 2 spherical head ends locking, when not destroying, and leave safe clearance at improper motion state down cut pin 6 at said joint shaft bearing; Least action load-up condition down cut pin 6 at said joint shaft bearing proper motion state can be cut off.

The content of not doing to describe in detail in the utility model specification belongs to those skilled in the art's known technology.

The utility model includes but not limited to above embodiment, and any replacement or local improvement of being equal to of carrying out under every spirit and principle at the utility model all will be regarded as within the protection domain of the utility model.

Claims (7)

1. an astrovehicle is used the high-mechanic joint shaft bearing, it is characterized in that: said joint shaft bearing mainly is made up of ball-and-socket (1), bulb (2) and ball seat (3); Ball-and-socket (1) and ball seat (3) are formed the outer ring of said joint shaft bearing, and ball seat (3) is positioned at the middle lower portion zone of ball-and-socket (1), and ball-and-socket (1) and ball seat (3) are through being threaded; Bulb (2) is the inner ring of joint shaft bearing, and an end is a bolt, and an end is a bulb-type; Bulb-type end and bolt end connection part are provided with knuckle, and the bulb-type end matches with the inboard sphere of ball-and-socket (1) and ball seat (3); Ball-and-socket (1) top perforate, the aperture is greater than bulb (2) bolt end gabarit, and the hole inner edge has chamfering.

2. a kind of astrovehicle according to claim 1 is used the high-mechanic joint shaft bearing, it is characterized in that: the allowable angle of inclination α of said joint shaft bearing _MaxConfirm by following formula:

${\mathrm{\α}}_{\max }=\arccos \frac{2L}{D}-\arcsin \frac{d}{D};$

Wherein, the centre of sphere of L---said joint shaft bearing angle contacting sphere is distance to ball-and-socket (1) upper-end surface, the diameter of d---bulb (2) bolt end, D---said joint shaft bearing angle contacting sphere diameter.

3. a kind of astrovehicle according to claim 1 is used the high-mechanic joint shaft bearing, it is characterized in that: between the bulb-type end of the inboard sphere of ball-and-socket (1) and bulb (2) shear pin (6) is set.

4. a kind of astrovehicle according to claim 1 is used the high-mechanic joint shaft bearing, it is characterized in that: ball-and-socket (1) arranged outside adpting flange (5).

5. a kind of astrovehicle according to claim 1 is used the high-mechanic joint shaft bearing, it is characterized in that: the bolt end of bulb (2) is provided with the spanner holding position.

6. a kind of astrovehicle according to claim 1 is used the high-mechanic joint shaft bearing, it is characterized in that: bulb (2) center is provided with lightening hole (4).

7. use the high-mechanic joint shaft bearing according to any described a kind of astrovehicle of claim 1～6, it is characterized in that: the inboard sphere of ball-and-socket (1) and ball seat (3) applies teflon fabric, molybdenum disulfide or self lubricating material.