Expansion type counterweight device

Abstract

The utility model discloses an expansion type counterweight device which mainly comprises a cavity, a pressing rod, a front end cover and a first pulley block. When the counterweight device is expanded, one end of the traction rope is connected to the counterweight block, and the other end of the traction rope bypasses the first pulley block or the first pulley block and the fourth pulley block and then bypasses the second pulley block and then is connected to the mounting seat to be fixed. Therefore, the volume and the weight of the balancing weight can be reduced by utilizing the characteristics of small volume, light weight and constant output pressure of the air pressure supporting rod, so that the frame of the lifting window can be further reduced. When the movable window sash descends, the balancing weight and the traction rope connected with the pressing rod also ascend, the movable section of the pressing rod is pressed under the action of the first pulley block, the second pulley block and the fourth pulley block, and constant pressure (equivalent to the gravity of the balancing weight) is provided for the balancing weight end all the time in the contraction process of the pressing rod, so that the constant weight of the balancing weight end is ensured, and large fluctuation of loads is avoided. The device also has the advantages of simple structure, convenience in operation and easiness in implementation.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting windows, in particular to a device for expanding a lifting window counterweight. Background Art

[0002] At present, most of the existing lifting windows use counterweight blocks / counterweight bars to balance the weight of the movable window sash. As the window area increases, the volume of the counterweight block also increases. An excessively large volume will improperly increase the area of ​​the window frame, thereby affecting the overall appearance of the lifting window and reducing the safety factor of the lifting structure.

[0003] Therefore, the existing technology needs to be further improved and perfected. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the prior art and provide a device for expanding the counterweight of a lifting window.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] An expandable counterweight device mainly includes a cavity, a pressure rod, a front end cover, and a first pulley block. The cavity is arranged in the bottom frame or the side frame of the lifting window. The front end cover is fixedly arranged at the front end of the cavity. The pressure rod is installed in the cavity toward the rear, and its fixed section is connected to the front end cover, and the movable section extends toward the rear end of the cavity. The first pulley block is arranged on the front end cover. One end of the traction rope is connected to the movable window sash, and the other end is connected to the counterweight block. The counterweight block is then connected to the movable section of the pressure rod after bypassing the first pulley block through another traction rope, or the other end of the traction rope directly bypasses the first pulley block and is connected to the movable section of the pressure rod.

[0007] Furthermore, the counterweight device also includes a mounting seat and a second pulley block. The mounting seat is symmetrically arranged in the middle of the pressure rod, and the pressure rod is locked and fixed in the cavity. The mounting seat is provided with a locking hole for locking the traction rope. The second pulley block is installed at the end of the movable section of the pressure rod, and the other end of the traction rope passes around the first pulley block and enters the cavity, and then passes around the second pulley block and is fixed in the locking hole of the mounting seat.

[0008] Furthermore, the counterweight device further comprises a third pulley block which is installed at the end of the movable section of the pressure rod in the vertical direction.

[0009] Furthermore, the counterweight device further comprises a first guide rail, which is fixedly mounted on the upper wall and the lower wall of the cavity, respectively, and the third pulley block slides on the first guide rail.

[0010] Furthermore, the counterweight device further comprises a fourth pulley block and a pulley seat. The fourth pulley block is mounted on the pulley seat. The pulley seat is arranged in front of the cavity and outside the cavity. The other end of the traction rope passes around the first pulley block or the fourth pulley block and the first pulley block and then is connected to the movable section of the pressure rod.

[0011] Furthermore, the counterweight device further comprises a second guide rail, which is arranged at the bottom of the cavity and the bottom of the pulley seat.

[0012] As a preferred solution of the present utility model, the second guide rail adopts a symmetrical L-shaped structure design.

[0013] As a preferred solution of the utility model, a first step for the second pulley block to slide is provided in the cavity. The first step is arranged at the bottom of the cavity and protrudes upward to below the second pulley block.

[0014] Furthermore, the mounting seat is also provided with a second step for limiting the position of the traction rope. The second step is located below the mounting seat and together with the cavity forms a space for limiting the range of movement of the traction rope.

[0015] Furthermore, the counterweight device further comprises a rear end cover which is installed at the rear end of the cavity.

[0016] As a preferred solution of the utility model, the pressure rod adopts a gas or liquid support rod with a constant output pressure.

[0017] The working process and principle of the utility model are as follows: when the counterweight device is extended, one end of the traction rope is connected to the counterweight block, and the other end is passed around the first pulley group or the first pulley group and the fourth pulley group, and then passed around the second pulley group and connected to the mounting seat for fixing. In this way, the volume and weight of the counterweight block can be reduced by utilizing the characteristics of the pneumatic support rod, which is small in size, light in weight, and constant in output pressure, so that the frame of the lifting window can be further reduced. When the movable window sash is lowered, the counterweight block and the traction rope connected to the pressure rod also rise accordingly, and the movable section of the pressure rod is pressed under the action of the first, second, and fourth pulley groups. During the contraction of the pressure rod, a constant pressure (equivalent to the gravity of the counterweight block) is always provided to the counterweight end, thereby ensuring that the weight of the counterweight end is constant and avoiding large fluctuations in the load. The utility model also has the advantages of simple structure, convenient operation, and easy implementation.

[0018] Compared with the prior art, the utility model also has the following advantages:

[0019] (1) The expandable counterweight device provided by the utility model uses a pressure rod to output a constant pressure, thereby avoiding a large pressure fluctuation at the counterweight end, so that the window sash can be raised and lowered steadily and smoothly.

[0020] (2) The expandable counterweight device provided by the utility model adopts a multi-set pulley block design to further expand the extensibility of the counterweight end, making the counterweight device suitable for more occasions.

[0021] (3) The expandable counterweight device provided by the utility model adopts the cooperation of the first guide rail and the third pulley group, so that the pressure rod can be stably and smoothly extended and retracted in the cavity, thereby providing stable and continuous pressure to the counterweight end. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the extended counterweight device provided by the utility model.

[0023] Figure 2 It is a structural diagram of the extended counterweight device (partial cavity cutaway) provided by the utility model.

[0024] Figure 3 It is a stereoscopic diagram of the extended counterweight device (partial cavity cutaway) provided by the utility model.

[0025] Figure 4 It is a stereoscopic diagram of the extended counterweight device (hidden cavity) provided by the utility model.

[0026] Figure 5 It is a three-dimensional diagram of the cavity provided by the utility model.

[0027] Figure 6 It is a cross-sectional view of the cavity provided by the utility model.

[0028] Figure 7 It is a three-dimensional diagram of the second and third pulley blocks provided by the utility model.

[0029] Figure 8 It is a front view of the second and third pulley blocks provided by the utility model.

[0030] Fig. 9 It is a structural schematic diagram of the mounting seat provided by the utility model.

[0031] Fig.10 It is a structural schematic diagram of the front end cover and the first pulley block provided by the utility model.

[0032] Fig.11 It is a structural schematic diagram of the fourth pulley block provided by the utility model.

[0033] Description of the reference numerals in the above drawings:

[0034] 1- cavity, 2- pressure rod, 3- front end cover, 4- first pulley block, 5- mounting seat, 6- second pulley block, 7- locking hole, 8- third pulley block, 9- first guide rail, 10- fourth pulley block, 11- pulley seat, 12- second guide rail, 13- first step, 14- second step, 15- rear end cover. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the utility model clearer and more specific, the utility model is further described below with reference to the accompanying drawings and embodiments.

[0036] Embodiment 1:

[0037] like Figures 1 to 11 As shown, this embodiment discloses an extended counterweight device, which mainly includes a cavity 1, a pressure rod 2, a front cover 3, and a first pulley block 4. The cavity 1 is arranged in the bottom frame or the side frame of the lifting window. The front cover 3 is fixedly arranged at the front end of the cavity 1. The pressure rod 2 is installed in the cavity 1 toward the rear, and its fixed section is connected to the front cover 3, and the movable section extends toward the rear end of the cavity 1. The first pulley block 4 is arranged on the front cover 3. One end of the traction rope is connected to the movable window sash, and the other end is connected to the counterweight block. The counterweight block is then connected to the movable section of the pressure rod 2 after bypassing the first pulley block 4 through another traction rope, or the other end of the traction rope directly bypasses the first pulley block 4 and is connected to the movable section of the pressure rod 2.

[0038] Furthermore, the counterweight device also includes a mounting seat 5 and a second pulley block 6. The mounting seat 5 is symmetrically arranged in the middle of the pressure rod 2 to lock and fix the pressure rod 2 in the cavity 1. The mounting seat 5 is provided with a locking hole 7 for locking the traction rope. The second pulley block 6 is installed at the end of the movable section of the pressure rod 2. The other end of the traction rope passes around the first pulley block 4 and enters the cavity 1, and then passes around the second pulley block 6 and is fixed in the locking hole 7 of the mounting seat 5.

[0039] Furthermore, the counterweight device further comprises a third pulley block 8. The third pulley block 8 is installed at the end of the movable section of the pressure rod 2 along the vertical direction.

[0040] Furthermore, the counterweight device further comprises a first guide rail 9. The first guide rail 9 is respectively fixedly mounted on the upper wall and the lower wall of the cavity 1. The third pulley block 8 slides on the first guide rail 9.

[0041] Furthermore, the counterweight device further includes a fourth pulley block 10 and a pulley seat 11. The fourth pulley block 10 is mounted on the pulley seat 11. The pulley seat 11 is arranged in front of the cavity 1, outside the cavity 1, and the other end of the traction rope is connected to the movable section of the pressure rod 2 after passing through the first pulley block 4 or the fourth pulley block 10 and the first pulley block 4.

[0042] Furthermore, the counterweight device further comprises a second guide rail 12. The second guide rail 12 is arranged at the bottom of the cavity 1 and the bottom of the pulley seat 11.

[0043] As a preferred solution of the present invention, the second guide rail 12 adopts a symmetrical L-shaped structure design.

[0044] As a preferred solution of the utility model, a first step 13 for sliding the second pulley block 6 is provided in the cavity 1. The first step 13 is arranged at the bottom of the cavity 1 and protrudes upward to below the second pulley block 6.

[0045] Furthermore, a second step 14 for limiting the position of the traction rope is also provided on the mounting seat 5. The second step 14 is located below the mounting seat 5 and together with the cavity 1 forms a space for limiting the range of movement of the traction rope.

[0046] Furthermore, the counterweight device further comprises a rear end cover 15. The rear end cover 15 is installed at the rear end of the cavity 1.

[0047] As a preferred solution of the present utility model, the pressure rod 2 adopts a gas or liquid support rod with a constant output pressure.

[0048] The working process and principle of the utility model are as follows: when the counterweight device is extended, one end of the traction rope is connected to the counterweight block, and the other end is passed around the first pulley block 4 or the first pulley block 4 and the fourth pulley block 10, and then passed around the second pulley block 6 and connected to the mounting seat 5 for fixing. In this way, the volume and weight of the counterweight block can be reduced by utilizing the characteristics of the pneumatic support rod, which is small in size, light in weight, and constant in output pressure, so that the frame of the lifting window can be further reduced. When the movable window sash is lowered, the counterweight block and the traction rope connected to the pressure rod 2 also rise accordingly, and the movable section of the pressure rod 2 is pressed under the action of the first, second, and fourth pulley blocks. During the contraction of the pressure rod 2, a constant pressure (equivalent to the gravity of the counterweight block) is always provided to the counterweight end, thereby ensuring that the weight of the counterweight end is constant and avoiding large fluctuations in the load. The utility model also has the advantages of simple structure, convenient operation, and easy implementation.

[0049] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. An extended counterweight device, characterized in that: It includes a cavity, a pressure rod, a front end cover, and a first pulley group; the cavity is arranged in the bottom frame or the side frame of the lifting window; the front end cover is fixedly arranged at the front end of the cavity; the pressure rod is installed in the cavity toward the rear, its fixed section is connected to the front end cover, and the movable section extends toward the rear end of the cavity; the first pulley group is arranged on the front end cover; one end of the traction rope is connected to the movable window sash, and the other end is connected to the counterweight block, and the counterweight block is then connected to the movable section of the pressure rod after passing through the first pulley group through another traction rope, or the other end of the traction rope directly passes through the first pulley group and is connected to the movable section of the pressure rod.

2. The expandable counterweight device according to claim 1, characterized in that: The counterweight device also includes a mounting seat and a second pulley group; the mounting seat is symmetrically arranged in the middle of the pressure rod, locking and fixing the pressure rod in the cavity; the mounting seat is provided with a locking hole for locking the traction rope; the second pulley group is installed at the end of the movable section of the pressure rod, and the other end of the traction rope passes around the first pulley group and enters the cavity, and then passes around the second pulley group and is fixed in the locking hole of the mounting seat.

3. The expandable counterweight device according to claim 1, characterized in that: The counterweight device further comprises a third pulley block; the third pulley block is installed at the end of the movable section of the pressure rod in the vertical direction.

4. The expandable counterweight device according to claim 3, characterized in that: The counterweight device also includes a first guide rail; the first guide rail is fixedly mounted on the upper wall and the lower wall of the cavity respectively; the third pulley set slides on the first guide rail.

5. The expandable counterweight device according to claim 1, characterized in that: The counterweight device also includes a fourth pulley block and a pulley seat; the fourth pulley block is installed on the pulley seat; the pulley seat is arranged in front of the cavity and outside the cavity, and the other end of the traction rope passes around the first pulley block or passes around the fourth pulley block and the first pulley block and then is connected to the movable section of the pressure rod.

6. The expandable counterweight device according to claim 5, characterized in that: The counterweight device also includes a second guide rail; the second guide rail is arranged at the bottom of the cavity and the bottom of the pulley seat.

7. The expandable counterweight device according to claim 6, characterized in that: The second guide rail adopts a symmetrical L-shaped structure design.

8. The expandable counterweight device according to claim 2, characterized in that: The cavity is provided with a first step for the second pulley block to slide; the first step is arranged at the bottom of the cavity and protrudes upward to below the second pulley block.

9. The expandable counterweight device according to claim 2, characterized in that: The mounting seat is also provided with a second step for limiting the position of the traction rope; the second step is located below the mounting seat and together with the cavity forms a space for limiting the range of movement of the traction rope.

10. The expandable counterweight device according to claim 1, characterized in that: The counterweight device also includes a rear end cover; the rear end cover is installed at the rear end of the cavity.

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