CN220037959U - Composite bearing and rotary module - Google Patents

Abstract

The utility model discloses a composite bearing and a rotary module, wherein a bearing body is hollow, two ends of the bearing body are open, two locking assemblies are sequentially arranged in the bearing body along the axial direction of the bearing body, and the locking assemblies are provided with external shafts through holes; the tension springs are arranged around the outer peripheral wall of the bearing body, are in a stretching state and are connected with the locking assemblies, so that the two locking assemblies clamp the external shaft in the through hole of the locking assemblies; the unlocking component comprises a first pulling piece, a second pulling piece, a connecting piece and an unlocking piece, wherein one end of the first pulling piece is rotationally connected with a locking component, the other end of the first pulling piece is rotationally connected with one end of the connecting piece, one end of the second pulling piece is rotationally connected with another locking component, and the other end of the second pulling piece is rotationally connected with the other end of the connecting piece. According to the technical scheme, the unlocking piece drives the connecting piece to move upwards to drive the first pulling piece and the second pulling piece to drive the two locking assemblies to rotate so as to loosen the external shaft, and the locking assemblies are prevented from deforming and clamping in long-time use, so that the unlocking piece is convenient and smooth to operate.

Description

Composite bearing and rotary module

Technical Field

The utility model relates to the technical field of photographic equipment, in particular to a composite bearing and a rotary module.

Background

With the improvement of living standard, photography is becoming an hobby of more and more people. In the process of shooting by hand, shooting by a stabilizer, anti-shooting by a shoulder and shooting by a tripod, for convenient shooting, manual rotation shooting is often required to be completed by assembling shooting accessories, such as a magic adapter, a quick-release plate, a handle, a tripod, an upper handle and the like, and the handle and the upper handle can be used for adjusting scene shooting at different angles, such as CN2022223847760, the unlocking members are driven simultaneously by pushing the unlocking members through a steel wire rope, so that the unlocking members are required to be pushed by a large force or a large extent, the user experience is poor, and the steel wire rope is easy to use for a long time.

Disclosure of Invention

The utility model provides a composite bearing and a rotary module, which aim to save labor and easily adjust an unlocking piece, and simultaneously the unlocking assembly is durable and does not deform.

In order to achieve the above object, the present utility model provides a composite bearing comprising:

the bearing body is arranged in a hollow way;

the two locking assemblies are sequentially arranged in the bearing body in a rotating manner along the axial direction of the bearing body, and each locking assembly is provided with a through hole arranged along the axial direction of the bearing body and used for installing an external shaft;

the tension springs are arranged around the outer peripheral wall of the bearing body, are in a stretching state and are connected with the locking assemblies, so that the two locking assemblies clamp an external shaft in a through hole of the locking assemblies; and

the unlocking assembly comprises a first pulling piece, a second pulling piece, a connecting piece and an unlocking piece, wherein one end of the first pulling piece is rotationally connected with the locking assembly, the other end of the first pulling piece is rotationally connected with one end of the connecting piece, one end of the second pulling piece is rotationally connected with the other locking assembly, the other end of the second pulling piece is rotationally connected with the other end of the connecting piece, the unlocking piece drives the connecting piece to move upwards to drive the first pulling piece and the second pulling piece to drive the two locking assemblies to rotate to loosen the external shaft.

In some embodiments, the unlocking assembly further comprises a first shaft rod, a first adapting part and a second adapting part are arranged at two ends of the first shaft rod, the first adapting part and the second adapting part are respectively arranged on the front side and the rear side of the connecting piece in a protruding mode, the first adapting part is connected with the first pulling piece, and the second adapting part is connected with the second pulling piece.

In some embodiments, the composite bearing further comprises a mounting seat mounted on the bearing body, the mounting seat is provided with a mounting opening, one end of the connecting piece penetrating through the mounting opening is convexly provided with a second shaft rod, the unlocking piece is rotatably connected with the mounting seat through a third shaft rod, the third shaft rod is parallel to the second shaft rod, the unlocking piece is provided with a clamping groove with an opening facing the second shaft rod, the clamping groove is connected with the outer Zhou Bika of the second shaft rod, and the unlocking piece drives the second shaft rod to move upwards to drive the connecting piece to move upwards when rotating around the third shaft rod along a first direction.

In some embodiments, the first transfer portion is protruding to be equipped with in mount pad upper surface, the unlocking piece includes the second transfer portion, the concave transfer groove that is equipped with of second transfer portion, first transfer portion runs through transfer groove downside opening rotate hold in the transfer groove, the third pole protrusion the both ends of first transfer portion both sides run through respectively the both sides cell wall of transfer groove.

In some embodiments, an elastic member is further compressed between the groove wall in the transfer groove and the upper surface of the first transfer portion, and the elastic member is located between the second shaft and the third shaft.

In some embodiments, the upper portion of the second adapting portion is further connected with a manual portion, and an outer surface of the manual portion is a cambered surface.

In some embodiments, the lower groove wall of the clamping groove is provided with a flaring, and the inner surface of the lower groove wall is an inclined surface.

In some embodiments, the upper surface of the mounting seat is further provided with a limiting portion opposite to the first transfer portion, the first transfer portion and the limiting portion radially extend above the mounting opening, and one end of the connecting piece passing through the mounting opening is erected between the first transfer portion and the limiting portion.

In some embodiments, the locking assembly comprises an annular retainer and a plurality of rolling elements, the annular retainer is rotatably arranged in the bearing body, the annular retainer is provided with a plurality of mounting grooves which are distributed at intervals along the circumferential direction of the annular retainer, and the mounting grooves penetrate through the annular retainer in the radial direction of the annular retainer; each rolling element is correspondingly arranged in one mounting groove, and the rolling elements can move in the radial direction of the annular retainer;

the bearing comprises a bearing body and is characterized in that a plurality of protruding parts distributed along the circumferential direction of the bearing body are arranged on the inner circumferential wall of the bearing body, the protruding parts are in one-to-one correspondence with the rolling parts, the protruding heights of the protruding parts are gradually increased or gradually decreased along the circumferential direction of the bearing body, and each rolling part is in butt joint with the corresponding protruding part.

The utility model further provides a rotary module which is used for photographic accessories and comprises a rotating shaft and the composite bearing, wherein the rotating shaft is arranged in the through holes of the two locking assemblies in a penetrating mode.

According to the technical scheme, a user can drive the connecting piece to move upwards through operating the unlocking piece so as to drive the first pulling piece and the second pulling piece to simultaneously drive the two locking assemblies to rotate, so that the two locking assemblies loosen the external shaft in the through hole of the locking assemblies. Of course, when the unlocking piece is not operated, the tension spring can restore the clamping of the external shaft through the elastic acting force of the two locking assemblies, so that the long-time use deformation and clamping conditions are prevented, and the unlocking piece is operated conveniently and smoothly.

Drawings

FIG. 1 is a schematic view of a composite bearing according to an embodiment of the present utility model;

FIG. 2 is an exploded view of the composite bearing of the embodiment of FIG. 1;

FIG. 3 is another exploded schematic view of the composite bearing of the embodiment of FIG. 1;

FIG. 4 is a schematic view of the locking assembly of the embodiment of FIG. 1;

FIG. 5 is a schematic view of the mounting base in the embodiment of FIG. 1;

fig. 6 is a schematic structural diagram of the unlocking member in the embodiment of fig. 1.

Description of the drawings

A bearing body 10;

a locking assembly 20; an annular retainer 21; a rolling member 22; an annular plectrum 23; a connection post 231;

a tension spring 30;

an unlocking assembly 40; a first pulling member 41a; a second pulling member 41b; a connecting member 42; an unlocking piece 43; a second switching portion 431; a clamping groove 4311; a ramp 4312; a manual part 432; a transfer groove 433; a first shaft 44; a second shaft 45; a third shaft 46; an elastic member 47;

a mounting base 50; a mounting port 51; a first transfer portion 52; a limit part 53;

a rotating shaft 60;

a planar bearing 70; a housing 80; a chute 81.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

It will also be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The utility model provides a composite bearing which can be applied to rotary joints of various photographic accessories (such as a magic adapter, a quick-release plate, a handle, an adapter bracket, a tripod, an upper handle and the like) so as to be quickly and conveniently unlocked for rotation adjustment.

Referring to fig. 1 and 2, in the present embodiment, the composite bearing includes a bearing body 10, two locking assemblies 20, a tension spring 30 and an unlocking assembly 40, the unlocking assembly 40 includes a first pulling member 41a, a second pulling member 41b, a connecting member 42 and an unlocking member 43, one end of the first pulling member 41a is rotatably connected with one locking assembly 40, the other end is rotatably connected with one end of the connecting member 42, one end of the second pulling member 41b is rotatably connected with the other locking assembly 40, the other end is rotatably connected with the other end of the connecting member 42, and the first pulling member 41a, the second pulling member 41b and the connecting member 42 can be separately provided, so that the connecting member 42 can simultaneously drive the first pulling member 41a and the second pulling member 41b, thereby preventing deformation and jamming conditions during long-time use.

The bearing body 10 is hollow and provided with two open ends, the bearing body 10 can be integrally cylindrical, or only the middle inner cavity of the bearing body 10 is cylindrical;

the two locking assemblies 20 are sequentially arranged in the bearing body 10 along the axial direction of the bearing body 10, the locking assemblies 20 are provided with through holes K which are arranged along the axial direction of the bearing body 10, and the through holes K are used for installing an external shaft (the external shaft can be a joint rotating shaft of a rotary joint of a photographic accessory), namely, the through holes K are used for inserting and installing the external shaft;

the tension springs 30 are arranged around the outer peripheral wall of the bearing body 10, are in a stretching state and are connected with the locking assemblies, so that the two locking assemblies 20 clamp an external shaft inserted into the through holes K of the two locking assemblies; the extension spring 30 extends along the circumferential direction of the bearing body 10 in a roundabout manner, so that the whole extension spring 30 is smaller in thickness, the installation space required by the extension spring 30 in the radial direction of the bearing body 10 is smaller, and the miniaturization and modularization of the composite bearing are facilitated.

The unlocking component 40 is in driving connection with the two locking components 20 and is used for driving the two locking components 20 to rotate so as to loosen the external shaft; the user can operate the unlocking member 43 to drive the connecting member 42 to move upwards to drive the first pulling member 41a and the second pulling member 41b to simultaneously drive the two locking assemblies 40 to rotate, so that the two locking assemblies 20 release the external shaft in the through hole K. Of course, when the unlocking member 43 is not operated, the tension spring 30 can restore the clamping of the external shaft by the elastic force of the two locking assemblies 20, so as to prevent the deformation and the clamping condition caused by long-time use, and not only operate the unlocking member 43 conveniently and smoothly.

When the composite bearing of the embodiment is applied to the rotary joint of the photographic accessory, the joint rotating shaft of the photographic accessory is inserted into the through holes K of the two locking assemblies 20 for installation, and when the unlocking piece 43 is not operated by a person, the two locking assemblies 20 keep a clamping state on the joint rotating shaft under the elastic acting force of the tension spring 30, so that the joint rotating shaft can not rotate, namely, the photographic accessory is fixed and not adjustable; when the unlocking piece 43 is operated by a person to unlock, the unlocking piece 43 drives the two locking assemblies 20 to rotate so that the two locking assemblies 20 loosen the joint rotating shaft, and at the moment, the joint rotating shaft can freely rotate in the through hole K, namely, the shooting accessory can freely rotate to adjust the shooting angle of the shooting equipment; after the photographing accessory is rotated by a well-adjusted angle, the user releases the operation of the unlocking member 43, and the unlocking assembly is restored to a state of maintaining the clamping of the joint rotating shaft under the elastic force of the tension spring 30, so as to lock the joint rotating shaft of the photographing accessory.

In the composite bearing of the embodiment, two locking assemblies 20 are arranged in the bearing body 10 along the axial direction of the bearing body, the two locking assemblies 20 are provided with axial through holes K for the external shaft to be inserted, a tension spring 30 is adopted to elastically act on the two locking assemblies 20, so that the two locking assemblies 20 keep clamping the external shaft inserted in the through holes K of the two locking assemblies, and an unlocking piece 43 connected with the two locking assemblies 20 is driven to drive the two locking assemblies 20 to loosen the external shaft; therefore, the composite bearing realizes the switching control of the clamping fixation and rotation adjustment of the external shaft. Therefore, the photographic accessory using the compound bearing of the embodiment can realize the quick switching of the locking and unlocking states of the joint rotating shaft of the photographic accessory only by inserting the joint rotating shaft of the rotary joint into the through hole K of the locking component 20, realize the quick rotation adjustment of the shooting angle of the shooting equipment, and effectively solve the problem that the photographic accessory such as a handle or an upper handle cannot quickly rotate and adjust the shooting angle of the shooting equipment at any time so as to meet the shooting requirements of different shooting angles of users. Moreover, by adopting the tension spring 30, the tension spring 30 is arranged against the outer peripheral wall of the bearing body 10, so that the occupied space is smaller, the increase of the radial smaller size of the bearing body 10 is reduced, and the bearing body 10 is conveniently designed to be smaller.

In addition, the composite bearing of this embodiment comprises bearing body 10, two locking subassembly 20, extension spring 30 and unlocking subassembly 40, and consequently, two locking subassembly 20 locate in the bearing body 10, and the holistic structure size of this embodiment composite bearing is less to, external axle installs in locking subassembly 20's through-hole K through pegging graft, and the size of the rotary joint of the photographic accessory that uses this composite bearing also can be less, can reduce photographic accessory whole occupation space, and it is more convenient to use.

Referring to fig. 3 and 4, in the present embodiment, the unlocking assembly 40 further includes a first shaft 44, two ends of the first shaft 44 are respectively provided with a first adapting portion 52 and a second adapting portion 431, the first adapting portion 52 and the second adapting portion 431 are respectively convexly disposed on front and rear sides of the connecting piece 42, the first shaft 44 and the connecting piece 42 can be separately disposed, so that the first adapting portion 52 is rotationally connected with the first pulling piece 41a, and the second adapting portion 431 is rotationally connected with the second pulling piece 41 b. Of course, the first shaft 44 and the connecting member 42 may be integrally provided.

In this embodiment, the composite bearing further includes a mounting seat 50 installed on the bearing body, the mounting seat 50 is provided with a mounting opening 51, one end of the connecting piece 42 penetrating through the mounting opening 51 is convexly provided with a second shaft 45, the unlocking piece 43 is rotationally connected with the mounting seat 50 through a third shaft 46, the third shaft 46 is parallel to the second shaft 45, the unlocking piece 43 is provided with a clamping groove 4311 with an opening facing the second shaft 45, the clamping groove 4311 is connected with an outer Zhou Bika of the second shaft 45, and when the unlocking piece 43 rotates around the third shaft 46 along the first direction, the second shaft 45 is driven to move upwards so as to drive the connecting piece 42 to move upwards. The second shaft 45 and the first shaft 44 can be arranged approximately vertically, which saves space and has compact overall structure.

Referring to fig. 4 and 5, specifically, the upper surface of the mounting seat 50 is convexly provided with a first switching portion 52, the unlocking member 43 includes a second switching portion 431, the second switching portion 431 is concavely provided with a switching groove 433, the first switching portion 52 penetrates through the opening at the lower side of the switching groove 433 to be rotatably accommodated in the switching groove 433, and two ends of the third shaft 46 protruding from two sides of the first switching portion 52 respectively penetrate through two side groove walls of the switching groove 433. The transit groove 433 may be provided in communication with the catching groove 4311, so that the transit groove 433 may have a lower side opening and a side opening that may face the side of the second shaft 45.

Further, the elastic member 47 is further compressed between the inner wall of the transferring groove 433 and the upper surface of the first transferring portion 52, the elastic member 47 is located between the second shaft 45 and the third shaft 46, and the elastic member 47 may be a spring, so that the unlocking member 43 has a bearing capacity between the first transferring portion 52 in the rotating process, rather than a rigid connection, and the user feel and experience are improved.

Referring to fig. 2 and 6, specifically, the lower groove wall of the locking groove 4311 is formed as a flaring, and the inner surface of the lower groove wall thereof is formed as an inclined surface 4312, so that the inclined surface 4312 distributes upward pushing force to the second shaft 45, thereby driving the connecting piece 42 to move upward.

In order to facilitate the user to operate the unlocking member 43, the upper portion of the second adapting portion 431 is further connected with a manual portion 432, the outer surface of the manual portion 432 is a cambered surface, the user can hold the manual portion 432 to move the unlocking member 43, the appearance is attractive, and the size of the manual portion 432 can be adapted according to the hand feeling and the size of the user.

In order to prevent the connecting piece 42 from shaking or deviating in the process of moving up and down, the upper surface of the mounting seat 50 is further provided with a limiting portion 53 arranged opposite to the first connecting portion 52, the first connecting portion 52 and the limiting portion 53 extend above the mounting opening 51 in a radial direction, and one end of the connecting piece 42 penetrating through the mounting opening 51 is erected between the first connecting portion 52 and the limiting portion 53, so that the limiting connecting piece 42 vertically penetrates through a space formed between the first connecting portion 52 and the limiting portion 53 to move, and the whole operation is stable.

In this embodiment, the middle section of the tension spring 30 (i.e., the section between the two ends of the tension spring 30) includes a plurality of S-shaped sections, i.e., the tension spring 30 extends in an S-shaped detour along the circumferential direction of the bearing body 10; of course, in other embodiments, the interruption of the tension spring 30 may also include a plurality of Z-shaped portions, that is, the tension spring 30 extends in a Z-shaped detour along the circumference of the bearing body 10. Preferably, the opening of the S-shaped portion is toward the end of the bearing body 10, or the opening of the Z-shaped portion is toward the end of the bearing body 10; in this way, it is ensured that the direction of the elastic action of the tension spring 30 remains along the circumferential direction of the bearing body 10.

In this embodiment, hooks are provided at both ends of the tension spring 30, and the hooks are respectively hung on the two locking assemblies 20. The present embodiment is connected with the locking assembly 20 by hooking the tension spring 30, so that the assembly and disassembly of the tension spring 30 are simpler and more convenient. Of course, in other embodiments, the tension spring 30 and the locking assembly 20 may be connected in other ways.

Referring to fig. 2 and 1, in the present embodiment, an annular groove (not shown) is further provided on the outer peripheral wall of the bearing body 10, and the tension spring 30 is located in the annular groove, and the annular groove is provided to accommodate the installation of the tension spring 30, so that the tension spring 30 does not protrude from the outer wall surface of the bearing body 10, and the overall size can be reduced better.

In some embodiments, the locking assembly 20 is rotatably coupled to the bearing body 10, i.e., the locking assembly 20 is rotatable about its axis relative to the bearing body 10; the unlocking member 43 is rotated by driving the two locking assemblies 20 to release the external shaft. The tension spring 30 keeps the two locking assemblies 20 at the position of clamping the external shaft, and the unlocking piece 43 drives the two locking assemblies 20 to rotate from the clamping position to the releasing position, so that the two locking assemblies 20 release the external shaft. The unlocking member 43 may drive the two locking assemblies 20 to rotate in opposite directions (e.g., one locking assembly 20 rotates clockwise and the other locking assembly 20 rotates counterclockwise), or may drive the two locking assemblies 20 to rotate in the same direction.

Referring to fig. 3 to 6, in the present embodiment, the locking assembly 20 includes an annular retainer 21 and a plurality of rolling members 22, the annular retainer 21 is rotatably disposed in the bearing body 10, the annular retainer 21 is provided with a plurality of mounting grooves distributed at intervals along the circumferential direction thereof, and the mounting grooves penetrate through the annular retainer 21 in the radial direction thereof; each rolling member is correspondingly installed in an installation groove, and the rolling member can move in the radial direction of the annular retainer 21; the inner peripheral wall of the bearing body 10 is provided with a plurality of protruding parts distributed along the circumferential direction of the bearing body, the protruding parts are in one-to-one correspondence with a plurality of rolling elements, the protruding heights of the protruding parts are gradually increased or gradually reduced along the circumferential direction of the bearing body 10, and each rolling element is abutted with the corresponding protruding part. Wherein, the rolling elements can be uniformly distributed at intervals along the circumferential direction of the annular retainer 21, so that the action of all directions on the annular retainer 21 on the external shaft is balanced.

In the present embodiment, the rolling members are exemplified by cylindrical rollers whose axial directions are parallel to the axial directions of the ring-shaped retainer 21; of course, in other embodiments, the rolling elements may also be ball rollers, or the like. In this embodiment, the surface of the protrusion contacting the rolling element is exemplified by an arc surface, however, in other embodiments, the surface of the protrusion contacting the rolling element may be an inclined surface. The rolling elements move from the position with the lowest protruding height to the position with the highest protruding height, the diameter variation of inscribed circles of the rolling elements is small (for example, 0.5 mm), when the external shaft is loosened by the rolling elements, no gap or very small gap is reserved between the external shaft and the rolling elements, the external shaft cannot shake in the radial direction, and the external shaft can be stably rotated and adjusted.

In this embodiment, the number of rolling elements on one annular retainer 21 is at least 3, and the difference between the distribution positions of any two rolling elements cannot exceed 180 °, and the number of rolling elements of the annular retainer 21 depends on the actual requirement. In this embodiment, for example, 6 rolling elements are uniformly spaced on one annular retainer 21, and two adjacent rolling elements are spaced 60 degrees apart.

The clamping principle of the locking assembly 20 of the present embodiment is: when the annular retainer 21 rotates in the direction of increasing the protruding height of the protruding part, each rolling element on the annular retainer 21 gradually deflects inwards along the radial direction of the annular retainer under the inward extrusion action of the protruding part which is abutted by the annular retainer, so that each rolling element presses the outer peripheral wall of the external shaft inwards to clamp the external shaft; when the annular retainer 21 rotates in a direction in which the protruding height of the protruding portion decreases, the inward pressing force of the protruding portion against the rolling elements gradually decreases, the rolling elements gradually shift outward in the radial direction thereof, and the pressing force of each rolling element against the outer peripheral wall of the external shaft gradually decreases until zero, thereby realizing the release of the external shaft. The tension springs 30 keep the rolling elements pressed against the outer peripheral wall of the external shaft by keeping the movement trend of the annular retainer 21 in the direction in which the height of the protruding portion increases, thereby keeping the external shaft clamped; the unlocking members 43 rotate in the direction of decreasing the height of the protrusions of the annular retainers 21 of the two unlocking assemblies, so that the rolling members release the extrusion of the external shaft, and the external shaft can rotate freely.

Referring to fig. 4 and 6, in the present embodiment, the height of each protrusion of the locking assembly 20 is gradually increased along the first circumferential direction (clockwise or counterclockwise) of the bearing body 10; the protrusion height of each protrusion of the other locking assembly 20 is gradually reduced along the first circumferential direction of the bearing body 10. Because in the state that the external shaft is clamped by the two locking assemblies 20, when the external shaft is subjected to the action of external force to generate a rotation trend, the rotation trend of the external shaft can drive the rolling element to generate a rotation trend in the same direction, if the rotation trend direction is the same as the direction in which the height of the protrusion is reduced, the rolling element is easily driven to rotate and deviate in the direction in which the protrusion is reduced, so that the external shaft is compressed less, and the clamping is unstable. For this reason, the present embodiment is constructed by designing the gradual change directions of the projection heights of the respective projections corresponding to the two locking assemblies 20 to be opposite; when the external shaft generates a rotation trend in a first direction (clockwise or anticlockwise) under the action of an external force, all rolling elements generate a rotation deviation trend in the first direction, and a movement trend of each rolling element of one locking assembly 20 is necessarily generated in a direction of increasing the protrusion height of the protruding part, namely, a movement trend in a direction of increasing the pressing force, so that each rolling element of the locking assembly 20 can clamp the external shaft more firmly; therefore, the embodiment further ensures the locking reliability of the composite bearing on the external shaft.

Referring to fig. 2 and 6, in the present embodiment, the locking assembly 20 further includes annular paddles 23, and the annular paddles 23 of the two locking assemblies 20 are respectively connected to adjacent ends of the two annular retainers 21, that is, the annular paddles 23 are connected to an end of the corresponding annular retainer 21 away from the end of the bearing body 10; the circumference wall of the bearing body 10 is provided with a plectrum mounting opening 12 along the circumference direction, the annular plectrum 23 is provided with a connecting column 231 positioned outside the plectrum mounting opening 12, the tension spring 30 is wound on one side of the bearing body 10 back to the plectrum mounting opening 12, and two ends of the tension spring 30 are correspondingly connected with the connecting columns 231 of the two annular plectrums 23.

Wherein, the annular plectrum 23 is installed from the plectrum installation opening 12 to the bearing body 10 (of course, the length of the plectrum installation opening 12 is not less than the outer diameter of the annular plectrum 23), the connecting column 231 on the annular plectrum 23 is exposed outside the plectrum installation opening 12, thereby facilitating the connection of the tension spring 30 with the same; the tension spring 30 is wound on the side of the bearing body 10 facing away from the mounting hole 12 of the shifting piece, and is respectively connected with the connecting posts 231 of the two annular shifting pieces 23 through two ends, so as to elastically act on the two annular shifting pieces 23, and further generate an acting force for keeping the clamping state on the two annular retainers 21, so that the two annular retainers 21 keep clamping on the outer connecting shaft. Of course, in other embodiments, the tension spring 30 may be provided in other ways to achieve the same function.

In summary, the user holds the manual part 432 from above the manual part 432 by hand, pulls back 41 the manual part 432, and drives the second shaft 45 in the clamping groove to slide relative to the inclined surface of the lower groove wall of the clamping groove when the second switching part 431 rotates around the third shaft 46 in the first direction, so as to drive the connecting piece to move upwards, and further the first pulling piece 41a and the second pulling piece 41b respectively generate acting force on the two connecting posts 231, so that the first pulling piece 41a and the second pulling piece 41b are close to each other, and the two annular pulling pieces 23 are driven to rotate in different directions, thereby realizing the rotation driving of the two annular retainers 21, and loosening the external connecting shafts by the rolling pieces on the two annular retainers 21. When the user releases the manual part 432, the second switching part 431 rotates around the third shaft 46 along the second direction, and when the two annular pulling pieces 23 rotate to the initial position under the elastic force of the tension spring 30, the rolling piece is enabled to restore to clamp the external shaft, and the first direction is opposite to the second direction, if the first direction is clockwise, and the second direction is anticlockwise.

In this embodiment, the bearing body 10 is provided with a planar bearing 70 at one end and a plurality of washers at the other end, which are locked by nuts. One end of the external shaft can be provided with a clamping component, the other end of the external shaft can be in threaded connection with a photographic accessory, and the connection mode is not limited, such as a cold boot sliding block, an Ala component and the like.

In some embodiments, the bearing body 10 is further sleeved with a housing 80, and the housing 80 wraps the parts such as the plectrum mounting seat 50, the connecting post 231, the tension spring 30, the steel wire rope and the like on the bearing body 10, so that the overall appearance is concise. The manual part 432 is located outside the housing 80 through a bar-shaped sliding groove 81 formed therein, and is operated by a user.

The utility model further provides a rotary module which is mainly applied to photographic accessories, such as a magic adapter, a quick-release plate, a handle, a tripod, an upper handle and the like.

The rotary module of the present utility model includes the rotary shaft 60 and the composite bearing, and the specific structure of the composite bearing refers to the above embodiment, and since the rotary module adopts all the technical solutions of all the embodiments of the composite bearing, at least has all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein. The rotating shaft 60 is inserted into the through holes K of the two locking assemblies 20 of the composite bearing.

The above description of the preferred embodiments of the present utility model should not be taken as limiting the scope of the utility model, but rather should be understood to cover all modifications, variations and adaptations of the present utility model using its general principles and the following detailed description and the accompanying drawings, or the direct/indirect application of the present utility model to other relevant arts and technologies.

Claims (10)

1. A composite bearing, comprising:

the bearing body is arranged in a hollow way;

the two locking assemblies are sequentially arranged in the bearing body in a rotating manner along the axial direction of the bearing body, and each locking assembly is provided with a through hole arranged along the axial direction of the bearing body and used for installing an external shaft;

the tension springs are arranged around the outer peripheral wall of the bearing body, are in a stretching state and are connected with the locking assemblies, so that the two locking assemblies clamp an external shaft in a through hole of the locking assemblies; and

the unlocking assembly comprises a first pulling piece, a second pulling piece, a connecting piece and an unlocking piece, wherein one end of the first pulling piece is rotationally connected with the locking assembly, the other end of the first pulling piece is rotationally connected with one end of the connecting piece, one end of the second pulling piece is rotationally connected with the other locking assembly, the other end of the second pulling piece is rotationally connected with the other end of the connecting piece, the unlocking piece drives the connecting piece to move upwards to drive the first pulling piece and the second pulling piece to drive the two locking assemblies to rotate to loosen the external shaft.

2. The composite bearing of claim 1, wherein the unlocking assembly further comprises a first shaft, two ends of the first shaft are respectively provided with a first switching part and a second switching part, the first switching part and the second switching part are respectively convexly arranged on the front side and the rear side of the connecting piece, the first switching part is connected with the first pulling piece, and the second switching part is connected with the second pulling piece.

3. The composite bearing of claim 2, further comprising a mounting seat mounted on the bearing body, wherein the mounting seat is provided with a mounting opening, one end of the connecting piece penetrating through the mounting opening is convexly provided with a second shaft, the unlocking piece is rotatably connected with the mounting seat through a third shaft, the third shaft is arranged in parallel with the second shaft, the unlocking piece is provided with a clamping groove with an opening facing the second shaft, the clamping groove is connected with an outer Zhou Bika of the second shaft, and the unlocking piece drives the second shaft to move upwards when rotating around the third shaft along a first direction so as to drive the connecting piece to move upwards.

4. The composite bearing of claim 3, wherein the mounting seat upper surface is convexly provided with a first switching portion, the unlocking piece comprises a second switching portion, the second switching portion is concavely provided with a switching groove, the first switching portion penetrates through an opening at the lower side of the switching groove to be rotatably accommodated in the switching groove, and two ends, protruding out of two sides of the first switching portion, of the third shaft respectively penetrate through two side groove walls of the switching groove.

5. The composite bearing of claim 4, wherein an elastic member is further compressed between the inner groove wall of the adapter groove and the upper surface of the first adapter portion, the elastic member being located between the second shaft and the third shaft.

6. The composite bearing of claim 4, wherein the upper portion of the second adapter portion is further connected to a manual portion, and an outer surface of the manual portion is an arc surface.

7. A composite bearing according to claim 3, wherein the lower groove wall of the clamping groove is provided with a flaring, and the inner surface of the lower groove wall is an inclined surface.

8. A composite bearing according to claim 3, wherein the upper surface of the mounting seat is further provided with a limiting portion arranged opposite to the first transfer portion, the first transfer portion and the limiting portion extend radially above the mounting opening, and one end of the connecting piece passing through the mounting opening is erected between the first transfer portion and the limiting portion.

9. The composite bearing according to claim 1, wherein the locking assembly comprises an annular retainer and a plurality of rolling elements, the annular retainer is rotatably arranged in the bearing body, the annular retainer is provided with a plurality of mounting grooves which are distributed at intervals along the circumferential direction of the annular retainer, and the mounting grooves penetrate through the annular retainer in the radial direction; each rolling element is correspondingly arranged in one mounting groove, and the rolling elements can move in the radial direction of the annular retainer;

the bearing comprises a bearing body and is characterized in that a plurality of protruding parts distributed along the circumferential direction of the bearing body are arranged on the inner circumferential wall of the bearing body, the protruding parts are in one-to-one correspondence with the rolling parts, the protruding heights of the protruding parts are gradually increased or gradually decreased along the circumferential direction of the bearing body, and each rolling part is in butt joint with the corresponding protruding part.

10. A rotary module for photographic accessories, comprising a rotary shaft and a composite bearing according to any one of claims 1 to 9, wherein the rotary shaft is arranged in through holes of two locking assemblies in a penetrating manner.