CN211369949U

CN211369949U - Lower pulley assembly

Info

Publication number: CN211369949U
Application number: CN201921894027.4U
Authority: CN
Inventors: 孙秉立; 孙国镇
Original assignee: Yanbian Huarui Blue Sky Doors And Windows Co ltd
Current assignee: Yanbian Huarui Blue Sky Doors And Windows Co ltd
Priority date: 2019-11-05
Filing date: 2019-11-05
Publication date: 2020-08-28
Anticipated expiration: 2029-11-05

Abstract

The embodiment of the application discloses lower pulley assembly includes: the device comprises a frame body, at least one pair of land wheels and at least one guide wheel; the at least one pair of land wheels are symmetrically arranged on two opposite sides of the frame body; the radius of the land wheel is greater than the distance from the center of the land wheel to the bottom end of the frame body; the guide wheel is arranged at the top of the frame body, wherein the central shaft of the guide wheel is vertical to the central shaft of the land wheel; the center of the frame body is provided with a fixing hole penetrating through the top and the bottom of the frame body. Install the lower pulley subassembly on supporting lower slide rail, the land wheel drives the support body and moves at orbital length direction down, when the door frame was in fold condition, the one end that does not install the loose-leaf on the door frame can hang in the outside of slide rail down, the lower pulley subassembly extrudees to the great one side slope of bearing weight, the back of lower pulley subassembly slope, the leading wheel and the contact of slide rail down continue to drive support body 1 and at orbital length direction motion down to the problem of lower pulley subassembly slip difficulty has been solved.

Description

Lower pulley assembly

Technical Field

The application relates to building door and window technical field especially relates to a lower pulley subassembly.

Background

The folding door is a partition device used in places such as workshops, markets, office buildings, exhibition halls and home decoration, and can effectively play roles in heat insulation, dust prevention, noise reduction, sound insulation, shielding and the like.

A folding door generally includes a door frame, an upper and a lower pulley assembly mounted on the door frame, and an upper and a lower rail respectively for providing a sliding track for the upper and lower pulley assemblies, the upper rail serving as a guide and the lower rail serving as a bearing and a sliding function. The existing lower pulley assembly comprises a frame body and ground wheels, wherein the ground wheels are installed on two opposite sides of the frame body, and the ground wheels slide on a track of a lower sliding rail to drive the frame body and a door frame connected with the frame body to move, so that the folding door can be unfolded or folded.

However, when the door frame is in a folded state, the end of the door frame, which is not provided with the hinge, may be suspended outside the lower slide rail, resulting in uneven weight borne by the lower pulley assembly, and further resulting in the lower pulley assembly being inclined and extruded to the side bearing a larger weight, thereby causing difficulty in sliding the lower pulley assembly.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application discloses a lower pulley assembly to solve the technical problem.

The application discloses lower pulley assembly includes: the device comprises a frame body, at least one pair of land wheels and at least one guide wheel; the at least one pair of land wheels are symmetrically arranged on two opposite sides of the frame body; the radius of the land wheel is greater than the distance from the center of the land wheel to the bottom end of the frame body; the guide wheel is arranged at the top of the frame body, wherein the central shaft of the guide wheel is vertical to the central shaft of the land wheel; the center of the frame body is provided with a fixing hole penetrating through the top and the bottom of the frame body.

Further, the frame body comprises a wheel seat, a first wheel shaft and a second wheel shaft; the first wheel shaft and the second wheel shaft are fixedly connected with the wheel seat; the land wheel is connected with the first wheel shaft through a first bearing; the guide wheel is connected with the second wheel shaft through a second bearing.

Furthermore, a through groove is formed in the bottom of the wheel seat; the through slot includes a first side wall, a second side wall, and a bottom wall, wherein the first side wall and the second side wall are perpendicular to an axis of the first axle.

Further, a pair of arc-shaped grooves are symmetrically arranged on the first side wall and the second side wall in a mirror image mode, and the arc-shaped grooves are located on two sides of the fixing hole.

Furthermore, the number of the guide wheels is two, the two guide wheels are respectively arranged at two ends of the frame body, and a connecting line of wheel centers of the two guide wheels is perpendicular to the axis of the guide wheels.

Further, the wheel seat is the cuboid structure, the preceding terminal surface and the rear end face of support body are the arc surface, the outward flange of leading wheel with the outward flange of arc surface aligns or the outward flange of leading wheel is located the outward flange of arc surface is inboard.

Furthermore, the top of the frame body is provided with a support rib.

Further, three pairs of land wheels are included.

The application discloses a lower pulley subassembly, when using, pass through fixed orifices fixed mounting with the loose-leaf on the support body, the door frame and the loose-leaf of folding door are connected again, the back is installed in the combination, install the lower pulley subassembly on supporting lower slide rail, the land wheel drives the support body at orbital length direction motion down, when the door frame is in fold condition, the one end that does not install the loose-leaf on the door frame can hang in the outside of lower slide rail, the lower pulley subassembly extrudees to the great lopsidedness of bearing weight, the back of lower pulley subassembly slope, leading wheel and lower slide rail contact, continue to drive support body 1 orbital length direction motion down, thereby the problem of lower pulley subassembly slip difficulty has been solved.

Drawings

In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.

Fig. 1 is a schematic structural diagram of a frame body of a lower pulley assembly disclosed in an embodiment of the present application;

FIG. 2 is a side view of a frame body of a lower pulley assembly disclosed in an embodiment of the present application;

FIG. 3 is a top view of a frame of a lower pulley assembly according to an embodiment of the present disclosure;

FIG. 4 is an elevation view of a frame body of a lower pulley assembly disclosed in an embodiment of the present application;

FIG. 5 is an elevation view of a lower pulley assembly disclosed in an embodiment of the present application;

FIG. 6 is a side view of a lower pulley assembly disclosed in an embodiment of the present application;

FIG. 7 is an elevation view of a lower pulley assembly disclosed in an embodiment of the present application;

fig. 8 is a schematic structural view of a lower slide rail disclosed in the embodiment of the present application;

FIG. 9 is a cross-sectional view of a lower track disclosed in an embodiment of the present application;

fig. 10 is a cross-sectional view of a lower pulley assembly and a lower slide rail assembly according to an embodiment of the present application.

Description of the reference numerals

1. A frame body; 11. a fixing hole; 12. a wheel seat; 13. a first axle; 14. a second wheel axle; 15, a U-shaped groove; 151. a first side wall; 152. a second side wall; 153. a bottom wall; 154. an arc-shaped groove; 155. a support rib; 2. a land wheel; 3. a guide wheel; 4, U-shaped grooves; 41. a first side plate; 42. a second side plate; 43. a base plate; 411. a first fixing plate; 421. a second fixing plate; 431. parallel tracks; 4111. a first sub plate; 4112. a second board; 4211. a third board dividing; 4212. and a fourth subplate.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Among the prior art, when the door frame was in fold condition, the one end that does not install the loose-leaf on the door frame can hang in the outside of slide rail down, and the weight that leads to the lower pulley subassembly to bear is inhomogeneous, and then can lead to the lower pulley subassembly to bearing the great lopsidedness extrusion of weight to can cause the lower pulley subassembly to slide the difficulty.

In order to solve the above technical problem, the present application discloses a lower pulley assembly.

The embodiment of the application discloses lower pulley assembly includes: the device comprises a frame body 1, at least one pair of land wheels 2 and at least one guide wheel 3; the at least one pair of land wheels 2 are symmetrically arranged on two opposite sides of the frame body 1; the radius of the land wheel 2 is larger than the distance from the wheel center of the land wheel 2 to the bottom end of the frame body 1; the guide wheels 3 are arranged at the top of the frame body 1, the two opposite ends of the bottom end of the frame body 1 and the top of the frame body 1 are arranged, wherein the central shaft of each guide wheel 3 is vertical to the central shaft of the land wheel 2; the center of the frame body 1 is provided with a fixing hole 11 which penetrates through the top and the bottom of the frame body 1.

As shown in fig. 1 to 4, fig. 1 is a schematic structural view of a rack 1, fig. 2 is a side view of the rack 1, fig. 3 is a top view of the rack 1, and fig. 4 is a front view of the rack 1.

The frame body 1 is used for bearing the grounding wheel 2, the guide wheel 3 and the hinge, and the hinge is used for connecting the door frame. The frame body 1 comprises a wheel seat 12, a first wheel shaft 13 and a second wheel shaft 14, wherein the first wheel shaft 13 is used for mounting the ground wheel 2, the second wheel shaft 14 is used for mounting the guide wheel, the wheel seat 12 preferably adopts a rectangular parallelepiped structure, the first wheel shaft 13 is symmetrically arranged on two opposite sides of the wheel seat 12, as shown in fig. 1, the first wheel shaft 13 is respectively arranged on a first side surface and a second side surface of the wheel seat 12, wherein the first side surface and the second side surface are two opposite side surfaces, the axis of the first wheel shaft 13 is perpendicular to the first side surface and the second side surface, the second wheel shaft 14 is arranged on the top of the wheel seat 12, the axis of the second wheel shaft 14 is perpendicular to the top of the wheel seat 12, and the top of the wheel seat 12 refers to the end of the wheel seat 12 close.

The present application does not limit the connection manner of the first and

second axles

13 and 14 to the wheel seat 12, for example: the first and

second axles

13 and 14 may be integrally formed with the wheel base 12, and the first and

second axles

13 and 14 may be fixedly connected to the wheel base 12 by welding.

As shown in fig. 5 to 7, fig. 5 is a top view of the lower pulley assembly, fig. 6 is a side view of the lower pulley assembly, and fig. 7 is a front view of the lower pulley assembly.

The land wheel 2 is connected to a first wheel axle 13 and the guide wheel 3 is connected to a second wheel axle 14. The land wheel 2 drives the frame body 1 to move in the length direction of the lower track, the central shaft of the guide wheel 3 is perpendicular to the central shaft of the land wheel 2, the center of the frame body 1 is provided with a fixing hole 11 penetrating through the top and the bottom of the frame body 1, and the fixing hole 11 is used for installing a hinge.

Preferably, the land wheel 2 is connected with the first wheel shaft 13 through a first bearing; the guide wheel 3 is connected with the second wheel shaft 14 through a second bearing.

When using, pass through fixed orifices 11 fixed mounting with the loose-leaf on support body 1, be connected the door frame and the loose-leaf of folding door again, the back is installed in the combination, install the lower pulley subassembly on supporting lower slide rail, land wheel 2 drives support body 1 at orbital length direction motion down, when the door frame is in fold condition, the one end that does not install the loose-leaf on the door frame can hang the outside at lower slide rail, the lower pulley subassembly extrudees to the great lopsidedness of bearing weight, the back of lower pulley subassembly slope, leading wheel 3 and lower slide rail contact, continue to drive support body 1 orbital length direction motion down, thereby the problem of lower pulley subassembly slip difficulty has been solved.

For clarity of the embodiments of the present application, for example, as shown in fig. 8 to 10, fig. 8 is a schematic structural diagram of a lower slide rail cooperating with a lower pulley assembly of the embodiments of the present application, fig. 9 is a cross section of the lower slide rail cooperating with the lower pulley assembly of the embodiments of the present application, and fig. 10 is a cross section of the lower pulley assembly of the embodiments of the present application and the lower slide rail after combination.

The lower slide rail as shown in fig. 8 and 9 includes: a U-shaped groove 4, wherein the U-shaped groove 4 comprises a first side plate 41, a second side plate 42 and a bottom plate 43; a first fixing plate 411 is connected to the upper end surface of the first side plate 41, and the first fixing plate 411 is perpendicular to the first side plate 41; the first fixing plate 411 comprises a first branch plate 4111 and a second branch plate 4112, wherein the first branch plate 4111 is located above the notch of the U-shaped groove 4; a second fixing plate 421 is connected to the upper end surface of the second side plate 42, and the second fixing plate 421 is perpendicular to the second side plate 42; the second fixing plate 421 comprises a third sub-plate 4211 and a fourth sub-plate 4212, wherein the third sub-plate 4211 is located above the notch of the U-shaped groove 4; a preset distance L is reserved between the first fixing plate 411 and the second fixing plate 421; two parallel rails 431 protruding upwards are arranged on the bottom plate 43, and the two rails 431 extend along the length direction of the U-shaped groove 4; the distance between the two rails 431 is greater than a preset distance L.

As shown in fig. 10, after the lower pulley assembly is combined with the lower sliding rail, the frame body 1 is located in the U-shaped groove 4, the ground wheel on one side of the frame body 1 is located between the parallel rail 431 and the first fixing plate 411, the ground wheel on the other side of the frame body 1 is located between the parallel rail 431 and the second fixing plate 421, the ground wheel 2 is in contact with the parallel rail 431 and slides on the parallel rail 431, and the guide wheel 3 is located between the first fixing plate 411 and the second fixing plate 421; the frame body 1 is connected with the hinge through the fixing hole 4, and the door frame of the folding door is connected with the hinge. After the combination is installed, the land wheel 2 drives the frame body 1 to reciprocate on the parallel track 431 along the length direction of the U-shaped groove 4, and then drives the door frame to be unfolded or folded. In order to avoid the above situation, the guide wheel 3 acts between the first fixing plate 411 and the second fixing plate 421, when the lower pulley assembly inclines to the first side plate 41, the guide wheel 3 contacts with the side surface of the first fixing plate 411 and slides along the side surface of the first fixing plate 411, and similarly, when the lower pulley assembly inclines to the second side plate 42, the guide wheel 3 contacts with the side surface of the second fixing plate 421 and slides along the side surface of the second fixing plate 421, wherein the side surface of the first fixing plate 411 and the side surface of the second fixing plate 421 refer to the side surface of the first fixing plate 411 and the side surface of the second fixing plate 421, respectively, which is close to the guide in the first fixing plate 411 and the second fixing plate 421 The opposite side of the wheel 3. The arrangement of the guide wheel 3 avoids the problem that the lower pulley assembly is difficult to slide when the door frame is in a folded state; on the other hand, the limiting function is achieved, and the lower pulley block is prevented from excessively inclining.

The lower slide rail in the above embodiment is an example for clearly explaining the structure and principle of the lower slide assembly of the present invention, and the lower slide assembly of the present invention is not limited to be engaged with the lower slide rail in the above embodiment, and may be engaged with another suitable lower slide rail.

It should be noted that, the sizes of the ground wheels 2 and the guide wheels 3 can be adjusted correspondingly according to the size of the matched lower slide rail, which is not limited in the present application.

In practical use, due to wind, sand and weather or artificial influence, some solid particles and the like are inevitably accumulated in the lower slide rail, in order to prevent the solid particles in the lower slide rail from obstructing the normal operation of the lower slide assembly when the lower slide assembly slides on the lower slide rail, a through groove 15 is arranged at the bottom of the wheel seat 12, the through groove 15 comprises a first side wall 151, a second side wall 152 and a bottom wall 153, and the first side wall 151 and the second side wall 152 are both perpendicular to the bottom wall 153.

The bottom of the wheel base 12 is the end of the wheel base 12 facing the lower track 531 after the lower pulley assembly is combined with the lower track. The through groove 15 is defined by a first side wall 151, a second side wall 152, and a bottom wall 153, wherein the first side wall 151 and the second side wall 152 are perpendicular to the axis of the first wheel axle 13, and the through groove 15 penetrates in the length direction of the wheel seat 12. When the lower pulley assembly runs on the lower sliding rail, the through groove 15 penetrates through solid particles in the lower sliding rail, and therefore the situation that the solid particles block the normal running of the lower pulley assembly is avoided.

Further, a pair of arc grooves 154 are provided on the first side wall 151 and the second side wall 152 in mirror symmetry, and the arc grooves 154 are located on both sides of the fixing hole 11.

The fixing holes 11 are used for mounting the loose leaf, on the one hand the arc-shaped recesses 154 provide a larger operating space for the mounting and on the other hand the mounting nuts.

Preferably, the number of the guide wheels 3 is two, the two guide wheels 3 are respectively arranged at two ends of the frame body 1, and a connecting line of wheel centers of the two guide wheels 3 is perpendicular to an axis of the guide wheels 3.

The effect of leading wheel 3 is when solving the lower pulley assembly slope, the problem of the difficulty of sliding sets up two leading wheels 3 respectively in the both ends of the traffic direction of support body 1, and when the lower pulley assembly slope, the leading wheel 3 at both ends can guarantee that the lower pulley assembly moves steadily on the slide rail down.

Further, the front end face and the rear end face of the frame body 1 are both arc faces, and the outer edge of the guide wheel 3 is aligned with the outer edge of the arc face or the outer edge of the guide wheel 3 is located on the inner side of the outer edge of the arc face.

The front end face and the rear end face of the frame body 1 are two end faces perpendicular to the top and the side faces of the frame body. The outward flange of leading wheel 3 with the outward flange of arc surface aligns or the outward flange of leading wheel 3 is located the outward flange of arc surface is inboard, can play the effect of protection leading wheel 3 to a certain extent, prevents that leading wheel 3 from being collided with, and then improves the life of leading wheel 3.

Preferably, the top of the frame body 1 is provided with a support rib 155.

The support ribs 155 are provided near the fixing holes 11 to cooperate with the fixing holes 11 for installing the loose-leaf pages. Two support ribs 155 may be provided and symmetrically disposed on both sides of the fixing hole 11 as shown in fig. 3, or more support ribs 155 may be provided and disposed near the fixing hole 11 in different forms, which is not limited in the present application.

Preferably, the lower pulley assembly comprises three pairs of ground wheels 2.

The present application has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to limit the application. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the presently disclosed embodiments and implementations thereof without departing from the spirit and scope of the present disclosure, and these fall within the scope of the present disclosure. The protection scope of this application is subject to the appended claims.

Claims

1. A lower pulley assembly, comprising: the device comprises a frame body (1), at least one pair of land wheels (2) and at least one guide wheel (3);

the at least one pair of land wheels (2) are symmetrically arranged on two opposite sides of the frame body (1);

the radius of the land wheel (2) is larger than the distance from the wheel center of the land wheel (2) to the bottom end of the frame body (1);

the guide wheel (3) is arranged at the top of the frame body (1), wherein the central shaft of the guide wheel (3) is vertical to the central shaft of the land wheel (2);

the center of the frame body (1) is provided with a fixing hole (11) which penetrates through the top and the bottom of the frame body (1).

2. A lower pulley assembly according to claim 1, characterized in that the frame (1) comprises a wheel base (12), a first wheel axle (13) and a second wheel axle (14);

the first wheel shaft (13) and the second wheel shaft (14) are fixedly connected with the wheel seat (12);

the land wheel (2) is connected with the first wheel shaft (13) through a first bearing;

the guide wheel (3) is connected with the second wheel shaft (14) through a second bearing.

3. A lower pulley assembly according to claim 2, characterized in that the bottom of the wheel seat (12) is provided with a through slot (15);

the through slot (15) comprises a first side wall (151), a second side wall (152) and a bottom wall (153), wherein the first side wall (151) and the second side wall (152) are perpendicular to the axis of the first wheel axle (13).

4. A lower pulley assembly according to claim 3, wherein the first and second side walls (151, 152) are mirror-symmetrically provided with a pair of arc-shaped grooves (154), the arc-shaped grooves (154) being located on both sides of the fixing hole (11).

5. A lower pulley assembly according to claim 2, wherein the number of the guide wheels (3) is two, two guide wheels (3) are respectively arranged at two ends of the frame body (1), and a connecting line of wheel centers of the two guide wheels (3) is perpendicular to an axis of the guide wheels (3).

6. A lower pulley assembly according to claim 5, wherein the wheel base (12) is of a cuboid structure, the front end face and the rear end face of the frame body (1) are both arc surfaces, and the outer edge of the guide wheel (3) is aligned with or inside the outer edge of the arc surface.

7. A lower pulley assembly according to claim 5, characterized in that the frame (1) is provided with support ribs (155) at its top.

8. A lower pulley assembly according to claim 1, comprising three pairs of ground wheels (2).