Pulley assembly

Abstract

The utility model discloses a pulley assembly which comprises a wheel carrier and a pulley block installed on the wheel carrier, and the pulley block is provided with more than two pulleys arranged in the left-right direction. The pulley is mounted on the wheel carrier in an up-and-down moving manner; wherein the pulley is provided with a wheel and a wheel shaft, the wheel is installed on the wheel frame through the wheel shaft, and the wheel shaft is installed on the wheel frame in an up-and-down movable mode; adjusting wheels are arranged on the portions, on the left side and the right side of the wheel shaft, of the wheel frame, the adjusting wheels can be installed on the wheel frame in a left-right moving mode, and the wheel shaft makes contact with the adjacent adjusting wheels. Thus, the adjusting wheels are arranged on the pulleys and used for adjusting the heights of the wheels in a self-adaptive mode, the wheels in each row can make effective contact with the rails, stress of each wheel is balanced, the doors and the windows can be pushed and pulled more smoothly, abrasion between the wheels and the rails can be reduced, and the service life of the pulley assembly and the service life of the doors and the windows are prolonged.

Description

Technical Field

[0001] This utility model relates to the field of doors and windows, and in particular to a pulley assembly. Background Technology

[0002] Traditional door and window pulleys are assembled with a rigid connection between the wheels and the wheel frame. Due to manufacturing errors (such as the wheels not being on the same horizontal plane), the wheels cannot bear weight evenly. This increases the wear on some wheels and tracks. In addition, during use, the contact between the wheels and tracks is not good enough, and the movement is not smooth.

[0003] Therefore, a new technical solution needs to be researched to address the above problems. Utility Model Content

[0004] To address the shortcomings and deficiencies of the existing technology, this utility model provides a pulley assembly. By setting adjustable wheels on the pulleys to adaptively adjust the height of the wheels, each row of wheels can effectively contact the track, balancing the force on each wheel, making the opening and closing of doors and windows smoother, reducing wear between the wheels and the track, and extending the service life of the pulley assembly and the doors and windows.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pulley assembly includes a wheel frame and a pulley group mounted on the wheel frame, the pulley group having two or more pulleys arranged in a left-right direction; the pulleys are movably mounted on the wheel frame; wherein:

[0007] The pulley has a wheel and an axle. The wheel is mounted on the wheel frame via the axle, and the axle is mounted on the wheel frame in a vertically movable manner. The wheel frame is provided with adjusting wheels on both the left and right sides of the axle, and the adjusting wheels are mounted on the wheel frame in a horizontally movable manner. The axle is in contact with its adjacent adjusting wheel.

[0008] It also includes a pulley fan fixing frame, the pulley assembly has two rows, the two rows of pulley assemblies are arranged in the front-to-back direction on the wheel frame; the pulley fan fixing frame is provided with a first connecting part, the wheel frame has a second connecting part for connecting with the first connecting part, and a swing gap is provided between the first connecting part and the first connecting part so that the pulley assembly can swing forward or backward around the length direction of the pulley fan fixing frame.

[0009] As a preferred embodiment, at least two adjusting wheels are provided between the two adjacent pulleys, and the two adjusting wheels are in contact with each other.

[0010] As a preferred embodiment, the wheel frame is made of aluminum profile, and the wheel frame is provided with a first mounting groove adapted to the adjusting wheel; the wheel frame is provided with a second mounting groove adapted to the wheel axle, and the second mounting groove is located inside the first mounting groove.

[0011] As a preferred embodiment, the first mounting groove is provided with a pair of raised guide protrusions, and the adjusting wheel has an annular guide groove adapted to the guide protrusions.

[0012] As a preferred embodiment, the center of the adjusting wheel is located above the center of the wheel axle.

[0013] As a preferred embodiment, the first connecting part is a swing cavity disposed on the pulley fan fixing frame, and the second connecting part is a swing cap disposed on the wheel frame, the swing cap being located in the swing cavity; the swing cavity has an arc-shaped inner wall, and the swing cap has an arc-shaped outer wall adapted to the arc-shaped inner wall.

[0014] As a preferred embodiment, the wheel frame is provided with an adjustment mechanism for adjusting the height of the wheels.

[0015] As a preferred embodiment, the adjustment mechanism includes a slider for pushing the adjustment wheel to move laterally. An adjustment screw is provided on the side of the slider away from the adjustment wheel. The adjustment screw is threaded to the wheel frame, with the first end of the adjustment screw located outside the wheel frame and the last end of the adjustment screw located inside the wheel frame and in contact with the slider.

[0016] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly uses an adjusting wheel on each row of pulleys to adaptively adjust the height of the wheel, so that each wheel can effectively contact the track, balance the force on each wheel, make the door and window push and pull more smoothly, reduce the wear between the wheel and the track, and extend the service life of the pulley assembly and the door and window.

[0017] Secondly, by allowing the wheel frame and pulley fan fixing frame to rotate slightly axially, the pulleys can automatically adjust according to the track conditions during installation or use, adaptively finding a balanced state, ensuring good contact between both rows of pulleys and the track, thereby improving load-bearing capacity and operational stability. This solves the problem of uneven load-bearing between the two rows of pulleys due to rigid connections in existing technologies, further improving the performance of the pulley assembly. Furthermore, a simple and ingenious wheel height adjustment mechanism allows for convenient manual adjustment of wheel height to meet different usage requirements.

[0018] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0019] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0020] Figure 2 This is a first exploded view of an embodiment of the present utility model;

[0021] Figure 3 This is a second exploded view of an embodiment of the present utility model;

[0022] Figure 4 This is a first cross-sectional view of an embodiment of the present utility model;

[0023] Figure 5 This is a side view of an embodiment of the present utility model;

[0024] Figure 6 This is a second cross-sectional view of an embodiment of the present utility model;

[0025] Figure 7 for Figure 6 A magnified view of a portion of the image;

[0026] Figure 8 This is a cross-sectional schematic diagram of the wheel frame in an embodiment of the present utility model;

[0027] Figure 9 This is a schematic diagram of another embodiment of the present utility model.

[0028] Explanation of reference numerals in the attached diagram:

[0029] 10. Wheel frame; 11. First mounting slot; 111. Guide protrusion; 12. Second mounting slot; 13. Swing cap; 20. Pulley; 21. Wheel; 211. First wheel; 212. Second wheel; 213. Third wheel; 214. Fourth wheel; 22. Axle; 23. Bushing; 30. Adjusting wheel; 301. First adjusting wheel; 302. Second adjusting wheel; 303. Third adjusting wheel; 304. Fourth adjusting wheel; 305. Fifth adjusting wheel; 306. Sixth adjusting wheel; 307. Seventh adjusting wheel; 308. Eighth adjusting wheel; 31. Annular guide groove; 40. Pulley fan fixing bracket; 41. Swing cavity; 51. Slider; 52. Adjusting screw; 60. Track; 61. Frame profile; 70. Plug. Detailed Implementation

[0030] The technical solutions of this utility model in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only preferred embodiments of this utility model.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] See attached document Figures 1 to 9 A pulley assembly according to an embodiment of the present invention includes a wheel frame 10 and a pulley group mounted on the wheel frame 10. The pulley group has two or more pulleys 20 arranged in a left-right direction. The pulleys 20 are movably mounted on the wheel frame 10.

[0034] The pulley 20 has a wheel 21 and an axle 22. The wheel 21 is mounted on the wheel frame 10 via the axle 22. The axle 22 is mounted on the wheel frame 10 in a vertically movable manner. The wheel frame 10 is provided with adjusting wheels 30 on both the left and right sides of the axle 22. The adjusting wheels 30 are mounted on the wheel frame 10 in a horizontally movable manner. The axle 22 is in contact with its adjacent adjusting wheel 30.

[0035] Thus, during use, each wheel 21 of the pulley system can automatically and adaptively adjust its height according to the actual situation of the track 60 of the frame profile 61, ensuring effective contact between each wheel 21 and the track 60. This balances the force on each wheel 21, making the sliding of doors and windows smoother and reducing abnormal wear between the wheels 21 and the track 60, thereby extending the service life of the pulley assembly and the doors and windows. It can be added that the axle 22 typically also includes a bushing 23 fitted around its perimeter; this is conventional technology and will not be elaborated upon here.

[0036] Preferably, at least two adjusting wheels 30 are provided between two adjacent pulleys 20, and the two adjusting wheels 30 are in contact with each other, thereby further ensuring that each pulley 20 (the wheel axle 22) can effectively contact its left and right adjusting wheels 30, ensuring the adaptive height adjustment function.

[0037] In this embodiment, the wheel 21 has four parts, see reference. Figure 4Here, from left to right, the wheels 21 are defined as: first wheel 211, second wheel 212, third wheel 213, and fourth wheel 214; from left to right, the adjusting wheels 30 are defined as: first adjusting wheel 301, second adjusting wheel 302, third adjusting wheel 303, fourth adjusting wheel 304, fifth adjusting wheel 305, sixth adjusting wheel 306, seventh adjusting wheel 307, and eighth adjusting wheel 308. As shown in the figure, the first adjusting wheel 301 is located on the left side of the first wheel 211, and the eighth adjusting wheel 308 is located on the right side of the fourth wheel 214. The second adjusting wheel 302 and the third adjusting wheel 303 are disposed on the first wheel 211 and the second wheel 214. Between 12; the fourth adjusting wheel 304 and the fifth adjusting wheel 305 are disposed between the second wheel 212 and the third wheel 213; the sixth adjusting wheel 306 and the seventh adjusting wheel 307 are disposed between the third wheel 213 and the fourth wheel 214, the left and right sides of the second adjusting wheel 302 are in contact with the first wheel 211 and the third adjusting wheel 303 respectively, and the right side of the third adjusting wheel 303 is in contact with the second wheel 212; the remaining fourth adjusting wheel 304, fifth adjusting wheel 305, sixth adjusting wheel 306 and seventh adjusting wheel 307 are also in this assembly relationship, which will not be described in detail here, so as to ensure the effectiveness of the adaptive adjustment of each wheel 21. It should be emphasized here that the actual size of the wheel 21 and the adjusting wheel 30 can be set according to the actual application. Moreover, the present invention does not specifically limit the size of the wheel 21 and the adjusting wheel 30. Products suspected of infringement only need to meet the requirement that the assembly relationship of the wheel 21 and the adjusting wheel 30 is basically the same as or has no essential difference from the technical solution of the present invention, and should be regarded as falling within the protection scope of the present invention.

[0038] Preferably, the wheel frame 10 is made of aluminum profile, which is lighter and puts less pressure on the wheel 21. It also has advantages such as being less prone to rust. The wheel frame 10 is provided with a first mounting groove 11 that is adapted to the adjusting wheel 30. The wheel frame 10 is provided with a second mounting groove 12 that is adapted to the wheel axle 22. The second mounting groove 12 is located inside the first mounting groove 11.

[0039] Preferably, the first mounting groove 11 is provided with a pair of raised guide protrusions 111, which extend along the length direction (left-right direction) of the wheel frame 10; the adjusting wheel 30 has an annular guide groove 31 adapted to the guide protrusions 111; during installation, the guide protrusions 111 and the annular guide groove 31 cooperate, thereby further ensuring the movement stability of the adjusting wheel 30. Furthermore, in practical applications, the center of the adjusting wheel 30 is preferably located above the center of the wheel axle 22.

[0040] Furthermore, in practical applications, it also includes a pulley fan fixing frame 40. The pulley assembly has two rows, arranged along the front-to-back direction on the wheel frame 10. The pulley fan fixing frame 40 is provided with a first connecting part, and the wheel frame 10 has a second connecting part for connecting to the first connecting part. A swing gap is provided between the first connecting part and the first connecting part to allow the pulley assembly to swing forward or backward around the length of the pulley fan fixing frame 40; that is, to swing axially forward or backward along the length of the pulley fan fixing frame 40. Thus, this structural design solves the problem of uneven load-bearing caused by pulley manufacturing errors (such as wheels on both sides being different heights and not on the same plane) in traditional rigid connections between pulleys and the pulley fan fixing frame 40. This technical solution allows the pulleys and the pulley fan fixing frame 40 to rotate slightly axially. During installation or use, the pulleys can automatically adjust according to the track conditions, adaptively finding a balanced state, ensuring good contact between both rows of pulleys and the track, thereby improving load-bearing capacity and operational stability.

[0041] Specifically, the first connecting part is a swing cavity 41 disposed in the pulley fan fixing frame 40, and the second connecting part is a swing cap 13 disposed on the wheel frame 10, wherein the swing cap 13 is located in the swing cavity 41; the swing cavity 41 has an arc-shaped inner wall, and the swing cap 13 has an arc-shaped outer wall adapted to the arc-shaped inner wall. The swing cavity 41 is an elongated strip disposed in the left-right direction, and the swing cap 13 is an elongated strip disposed in the left-right direction.

[0042] It can be added here that the adjusting wheels 30 are usually arranged in groups. A pulley system typically has two rows of adjusting wheels, located at the front and rear of the first pulley system, respectively. That is, the two rows of adjusting wheels act on the front and rear sections of the bushing, thus ensuring the working stability of the first pulley system. In this embodiment, the pulley system has two rows, resulting in four rows of adjusting wheels. Correspondingly, as... Figure 8 As shown, each row of pulleys has two rows of first mounting slots 11 and two rows of second mounting slots 12; the two rows of first mounting slots 11 are located on the front and rear sides of the pulley group, respectively; similarly, the two rows of second mounting slots 12 are located on the front and rear sides of the pulley group, respectively.

[0043] like Figure 9As shown, the wheel frame 10 preferably has an adjustment mechanism for adjusting the height of the wheel 21, allowing installers to adjust it themselves according to actual conditions. Specifically, the adjustment mechanism includes a slider 51 for pushing the adjusting wheel 30 to move laterally left and right. An adjusting screw 52 is located on the side of the slider 51 away from the adjusting wheel 30. The adjusting screw 52 is threaded onto the wheel frame 10, with its head outside the wheel frame 10 and its tail inside the wheel frame 10, contacting the slider 51. Thus, when the height of the wheel 21 needs to be adjusted, only the adjusting screw 52 needs to be turned. This technical solution has a simple and ingenious structure and is easy to adjust. Specifically, a plug 70 is typically provided at the end of the wheel frame 10, and the adjusting screw 52 is threaded onto the plug 70. Its working principle is roughly as follows: When the adjusting screw 52 is turned clockwise, the adjusting screw 52 pushes the slider to the left, pushing the adjusting wheel 30 to reduce the gap, the adjusting wheel 30 presses down the wheel 21, and the wheel frame 10 rises; when the adjusting screw 52 is turned counterclockwise, the adjusting screw 52 is released from the slider 51, the gap of the adjusting wheel 30 increases, the wheel 21 retracts under the load, and the height of the wheel frame 10 decreases.

[0044] The key design feature of this utility model is that it is mainly by setting an adjusting wheel on each row of pulleys to adaptively adjust the height of the wheel, so that each wheel can effectively contact the track, balance the force on each wheel, make the door and window push and pull more smoothly, reduce the wear between the wheel and the track, and extend the service life of the pulley assembly and the door and window.

[0045] Secondly, by allowing the wheel frame and pulley fan fixing frame to rotate slightly axially, the pulleys can automatically adjust according to the track conditions during installation or use, adaptively finding a balanced state, ensuring good contact between both rows of pulleys and the track, thereby improving load-bearing capacity and operational stability. This solves the problem of uneven load-bearing between the two rows of pulleys due to rigid connections in existing technologies, further improving the performance of the pulley assembly. Furthermore, a simple and ingenious wheel height adjustment mechanism allows for convenient manual adjustment of wheel height to meet different usage requirements.

[0046] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A pulley assembly, comprising a wheel frame and a pulley group mounted on the wheel frame, the pulley group having two or more pulleys arranged in a left-right direction; characterized in that: The pulley is movably mounted on the wheel frame; wherein: The pulley has a wheel and an axle. The wheel is mounted on the wheel frame via the axle, and the axle is mounted on the wheel frame in a vertically movable manner. The wheel frame is provided with adjusting wheels on both the left and right sides of the axle, and the adjusting wheels are mounted on the wheel frame in a horizontally movable manner. The axle is in contact with its adjacent adjusting wheel. It also includes a pulley fan fixing frame, the pulley assembly has two rows, the two rows of pulley assemblies are arranged in the front-to-back direction on the wheel frame; the pulley fan fixing frame is provided with a first connecting part, the wheel frame has a second connecting part for connecting with the first connecting part, and a swing gap is provided between the first connecting part and the first connecting part so that the pulley assembly can swing forward or backward around the length direction of the pulley fan fixing frame.

2. The pulley assembly according to claim 1, characterized in that: At least two adjusting wheels are provided between the two adjacent pulleys, and the two adjusting wheels are in contact with each other.

3. A pulley assembly according to claim 2, characterized in that: The wheel frame is made of aluminum profile, and the wheel frame is provided with a first mounting groove adapted to the adjusting wheel; the wheel frame is provided with a second mounting groove adapted to the wheel axle, and the second mounting groove is located inside the first mounting groove.

4. A pulley assembly according to claim 3, characterized in that: The first mounting groove is provided with a pair of raised guide protrusions, and the adjusting wheel has an annular guide groove that is adapted to the guide protrusions.

5. A pulley assembly according to claim 4, characterized in that: The center of the adjusting wheel is located above the center of the axle.

6. A pulley assembly according to claim 1, characterized in that: The first connecting part is a swing cavity disposed on the pulley fan fixing frame, and the second connecting part is a swing cap disposed on the wheel frame, the swing cap being located in the swing cavity; the swing cavity has an arc-shaped inner wall, and the swing cap has an arc-shaped outer wall adapted to the arc-shaped inner wall.

7. A pulley assembly according to claim 6, characterized in that: The wheel frame is equipped with an adjustment mechanism for adjusting the height of the wheels.

8. A pulley assembly according to claim 7, characterized in that: The adjustment mechanism includes a slider for pushing the adjustment wheel to move laterally. An adjustment screw is provided on the side of the slider away from the adjustment wheel. The adjustment screw is threaded to the wheel frame, with the first end of the adjustment screw located outside the wheel frame and the end of the adjustment screw located inside the wheel frame and in contact with the slider.

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