Power-assisted pulley
By introducing rotating parts and elastic parts into the power pulley, the problem of sliding lag and lag of the outer shell and the inner shell is solved, and the smoothness of sliding and labor-saving improvement effect is achieved.
Patent Information
- Application Number
- CN202422546074.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-10-21
AI Technical Summary
During the lifting operation of the existing power pulley, the outer shell and inner shell have problems of sliding lag.
A power pulley is designed, including a main bracket, an outer shell, an inner shell, an elastic member, a rotating member and a roller. The rotating member abuts on the inner side wall of the outer shell and rotates relative to the main bracket to limit the movement of the inner shell, converting sliding friction into rolling friction, increasing the elastic support of the elastic member to avoid lag.
It improves the sliding smoothness of the inner shell relative to the outer shell, reduces lag, and provides a labor-saving operating experience.
Smart Images
Figure CN223241272U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of building hardware, and more particularly to a power-assisting pulley. Background Art
[0002] Lift-and-slide doors and windows are designed to lift and lower the sash by using a handle and transmission mechanism to drive a pulley mechanism. To reduce lifting effort and ensure smooth sliding, these lift-and-slide doors and windows utilize a booster pulley in addition to the main pulley.
[0003] The above-mentioned power-assisted pulley comprises an outer shell and an inner shell, and during the operation of the handle, the outer shell and the inner shell slide relative to each other. However, during the lifting operation, the power-assisted pulley may become stuck between the outer shell and the inner shell, and may not operate smoothly. Utility Model Content
[0004] The technical problem to be solved by the present invention is to provide a new power-boosting pulley in view of the problem that the outer shell and the inner shell of the above-mentioned power-boosting pulley may slide and become stuck during the lifting operation.
[0005] The technical solution of the present invention to solve the above technical problems is to provide a power-assisted pulley used for lifting and sliding doors or lifting and sliding windows, the power-assisted pulley comprising a main bracket, an outer shell, an inner shell, an elastic member, a rotating member and a roller, and the power-assisted pulley is assembled to the bottom of the door or window sash through the main bracket;
[0006] The rotating member is rotatably connected to the main bracket, and the main bracket is mounted to the inner shell, and the outer periphery of the rotating member protrudes from two side walls of the inner shell that are perpendicular to the first direction; the elastic member is mounted between the main bracket and the inner shell, and applies an elastic force to the main bracket along the second direction through an elastic restoring force; the roller is mounted to the inner shell through a rotating shaft arranged along the first direction, and the inner shell is mounted in the outer shell, and at least a portion of the main bracket is exposed above the outer shell, and the bottom of the roller protrudes to the bottom of the inner shell and the bottom of the outer shell respectively, and the rotating member limits the movement of the inner shell relative to the outer shell along the third direction by abutting against the inner sides of two side walls of the outer shell that are perpendicular to the first direction and rotating relative to the main bracket; the first direction, the second direction and the third direction are perpendicular to each other.
[0007] As a further improvement of the present invention, the outer shell includes a first accommodating cavity, and the first accommodating cavity includes a first opening located at the top of the outer shell and a second opening located at the bottom of the outer shell; the inner shell includes a second accommodating cavity, the second accommodating cavity includes a third opening located at the bottom of the inner shell, and the bottom of the roller protrudes to the bottom of the inner shell through the third opening; the inner shell is installed in the first accommodating cavity of the outer shell, and the bottom of the roller protrudes to the bottom of the outer shell through the second opening.
[0008] As a further improvement of the present invention, the two side walls of the first accommodating cavity perpendicular to the first direction respectively have guide windows, the size of the guide windows in the third direction is larger than the size of the inner shell in the third direction, and when the inner shell is installed in the first accommodating cavity, the two sides of the inner shell are respectively embedded in the two guide windows.
[0009] As a further improvement of the present invention, the main bracket includes a fixing plate and a support column, the fixing plate protrudes above the outer shell, and the support column is vertically connected to the fixing plate along a first direction; the inner shell has a through hole with a central axis arranged along a first direction, and the support column is slidably connected to the through hole along the first direction; the elastic member is composed of a spring sleeved on the support column, and one end of the spring rests on the fixing plate, and the other end of the spring rests on the outer periphery of the through hole.
[0010] As a further improvement of the present invention, the free end of the support column includes a cylindrical section with a circular cross-section, and the rotating member is composed of a sleeve or a bearing sleeved on the cylindrical section of the support column.
[0011] As a further improvement of the present invention, the through hole is composed of a circular hole, and the diameter of the circular hole is larger than the diameter of the cylindrical section; the cylindrical section of the support column passes through the through hole and protrudes to the bottom of the inner shell, and the rotating part is sleeved on the cylindrical section and axially fixed by a gasket.
[0012] As a further improvement of the present invention, the main bracket includes two support columns distributed along the third direction, the inner shell includes a main body and protrusions respectively connected to the two ends of the third direction on the main body, and the bottom surface of the protrusion is higher than the bottom surface of the main body; the roller is mounted on the main body, each protrusion has a through hole with the central axis arranged along the first direction, the cylindrical sections of the two support columns respectively pass through the through holes and protrude from the bottom surface of the protrusion, and during the sliding process of the inner shell relative to the outer shell, the outer periphery of a rotating part on a support column is always in contact with the inner side of the side wall of the outer shell.
[0013] As a further improvement of the present invention, the inner shell includes a third accommodating chamber, and the top of the third accommodating chamber has a fourth opening, the through hole is located at the bottom of the third accommodating chamber, and the free end of the support column passes through the fourth opening, the third accommodating chamber and the through hole in sequence and is axially fixed by a gasket under the through hole.
[0014] As a further improvement of the present invention, the cross-sectional shape of the support column is adapted to the shape of the through hole, the size of the cross-sectional area of the support column gradually decreases from the root to the cylindrical section, and the size of the cross-sectional area of the support column close to the cylindrical section is smaller than the size of the through hole, and the size of the cross-sectional area close to the root is larger than the size of the through hole.
[0015] As a further improvement of the present invention, the housing is provided with a fixing portion for connecting to a lifting rod.
[0016] The utility model has the following beneficial effects: by adding a rotating part that rests on the inner side of the side wall of the outer shell to the main bracket, and by rotating the rotating part relative to the main bracket to limit the sliding of the inner shell along the third direction, the jamming of the inner shell in the power pulley during the movement is avoided, and the smoothness of the sliding of the inner shell relative to the outer shell is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the exploded structure of the power pulley provided in an embodiment of the utility model.
[0018] Figure 2 This is a schematic diagram of the combined state of the power pulley provided by an embodiment of the utility model.
[0019] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of the middle power pulley along the AA plane.
[0020] Figure 4 It is a structural schematic diagram of the main bracket in the power pulley provided by an embodiment of the utility model.
[0021] Figure 5 It is a structural schematic diagram of the inner shell of the power pulley provided in an embodiment of the utility model.
[0022] Figure 6 It is a structural schematic diagram of the outer shell of the power-assisting pulley provided in an embodiment of the present utility model.
[0023] 10 Main bracket 11 Fixing plate
[0024] 111 fixing hole 12 support column
[0025] 121 cylindrical section 20 shell
[0026] 23 first accommodating cavity 24 guide window
[0027] 25 fixing portion 30 inner shell
[0028] 31 Main body 32 Protrusion
[0029] 33 Second accommodating cavity 34 Shaft hole
[0030] 35 through hole 40 elastic part
[0031] 50 Rotating part 60 Roller
[0032] 70 Shaft 80 Gasket DETAILED DESCRIPTION
[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0034] like Figure 1-Figure 3 FIG. 1 is a schematic diagram of the structure of a power-assisted pulley provided by an embodiment of the present invention. The power-assisted pulley can be used for lifting and sliding doors or windows. It can be installed at the bottom of the door or window sash and cooperate with the main pulley, transmission mechanism, etc. of the lifting and sliding door or window to achieve lifting, fixing, and sliding of the lifting and sliding door or window. The power-assisted pulley of this embodiment includes a main bracket 10, an outer shell 20, an inner shell 30, an elastic member 40, a rotating member 50, and a roller 60. The power-assisted pulley is assembled to the bottom of the door or window sash via the main bracket 10, for example, by screws to fix the main bracket 10 to the bottom of the door or window sash. The assembly of the power-assisted pulley with the door or window sash and the transmission mechanism can adopt conventional solutions in the art and will not be described in detail here.
[0035] The rotating member 50 is rotatably connected to the main support 10 and can rotate relative to the main support 10 about the second direction Y. Specifically, a rotating shaft arranged along the second direction Y can be provided on the main support 10, and the rotating member 50 is mounted on the rotating shaft arranged along the second direction Y. The main support 10 is mounted to the inner shell 30. When the main support 10 is mounted to the inner shell 30, the outer periphery of the rotating member 50 protrudes from two side walls of the inner shell 30 perpendicular to the first direction X. At least a portion of the main support 10 is exposed above the inner shell 30 and is fixed to the bottom of the door or window sash via the portion exposed above the inner shell 30.
[0036] The elastic member 40 is mounted between the main support 10 and the inner shell 30 and applies an elastic force along the second direction Y to the main support 10 through its elastic restoring force. That is, the elastic member 40 is compressed along the second direction Y under the weight of the door or window sash. The roller 60 is mounted to the inner shell 30 via a rotating shaft 70 arranged along the first direction X and passing through the shaft hole 34. The inner shell 30 is mounted within the outer shell 20, and at least a portion of the main support 10 protrudes above the outer shell 20. The bottom of the roller 60 protrudes below the inner shell 30 and below the outer shell 20, respectively. Therefore, when the power pulley is assembled to the bottom of the door or window sash, the roller 60 can contact the guide rail, bear part of the weight of the door or window sash, and rotate along the rotating shaft 70 during the movement of the door or window sash, making the movement of the door or window sash smoother.
[0037] When the handle of the lift-sliding door or window is operated, the outer shell 20 is pulled by the transmission mechanism, and the inner shell 30 is relatively stationary due to the gravity of the door or window sash, that is, the outer shell 20 slides relative to the inner shell 30. At this time, the rotating member 50 abuts against the inner sides of the two side walls of the outer shell 20 perpendicular to the first direction X (such as Figure 3 The inner housing 30 is positioned relative to the outer housing 20 in a third direction Z, preventing the outer housing 20 and the inner housing 30 from shaking and causing a jam during relative sliding. The first direction X, second direction Y, and third direction Z are mutually perpendicular. Specifically, the first direction X is the thickness direction of the door or window sash, the second direction Y is the height direction of the door or window sash, and the third direction X is the direction of movement of the door or window sash.
[0038] The power-assisted pulley described above utilizes a rotating member 50 added to the main support 10, which abuts against the inner side of the sidewall of the outer shell 20. The rotating member 50 rotates relative to the main support 10 to limit the sliding movement of the inner shell along the third direction Z. This prevents the inner shell 30 from swaying during its movement relative to the outer shell 20, while converting the sliding friction between the outer shell 20 and the inner shell 30 into rolling friction, thereby improving the smoothness of the sliding of the inner shell 30 relative to the outer shell 20. Furthermore, the presence of the elastic member 40 provides an upward supporting force for the door or window sash, making it relatively labor-saving to operate the handle when lifting.
[0039] The main support 10 , outer shell 20 , inner shell 30 , elastic member 40 and rotating member 50 may all be made of hard materials such as metal.
[0040] like Figure 6 As shown, in one embodiment of the present invention, the housing 20 includes a first accommodating cavity 23, and the first accommodating cavity 23 includes a first opening located at the top of the housing 20 and a second opening located at the bottom of the housing 20. Figure 5As shown, the inner shell 30 includes a second accommodating cavity 33, the second accommodating cavity 33 includes a third opening located at the bottom of the inner shell 30, and the bottom of the roller 60 protrudes below the inner shell 30 through the third opening. The inner shell 30 is installed in the first accommodating cavity 23 of the outer shell 20, and the bottom of the roller 60 protrudes below the outer shell 30 through the second opening, as shown in FIG. Figure 2 Specifically, the outer shell 20 and inner shell 30 can each be formed by assembling multiple sheet metal parts. For example, the outer shell 20 and inner shell 30 each include two side panels perpendicular to the first direction X and multiple connecting plates connected between the two side panels and parallel to the first direction X. The dimensions of the outer shell 20 and inner shell 30 in the third direction Z are much larger than their dimensions in the first direction X and the second direction Y. In particular, the bottom of the outer shell 20 can be hollowed out or have connecting plates to enhance overall strength.
[0041] The above structure facilitates the processing of the outer shell 20 and the inner shell 30 , reduces costs, and facilitates the assembly of the outer shell 20 and the inner shell 30 .
[0042] In one embodiment of the present invention, the two side walls of the first accommodating cavity 23 (i.e., the side panels of the outer shell 20) perpendicular to the first direction X each have a guide window 24 arranged along the third direction Z. The dimension of the guide window 24 in the third direction Z is larger than the dimension of the inner shell 30 in the third direction Z. When the inner shell 30 is installed in the first accommodating cavity 23, the two sides of the inner shell 30 (i.e., the two side panels) respectively fit into the two guide windows 24. The guide windows 24 limit the sliding movement of the inner shell 30 and also facilitate assembly of the inner shell 30. For example, the inner shell 30 can be directly assembled to the outer shell 20 through the guide windows 24.
[0043] Specifically, when assembling the power pulley, the inner shell 30 may be assembled to the outer shell 20 first, and then the roller 60 , the main bracket 10 , the elastic member 40 , etc. may be assembled to the inner shell 30 .
[0044] like Figure 4 As shown, in one embodiment of the present invention, the main bracket 10 includes a fixing plate 11 and a support column 12. The fixing plate 11 protrudes above the outer shell 20 and has multiple fixing holes 111. The fixing plate 11 is fixed to the bottom of the door or window sash via screws passing through the fixing holes 111. The support column 12 is vertically connected to the fixing plate 11 along a first direction X. Correspondingly, the inner shell 30 has a through hole 35 whose central axis is arranged along the first direction X. The support column 12 is slidably connected within the through hole 35 along the first direction X. The elastic member 40 is composed of a spring mounted on the support column 12, with one end of the spring resting on the fixing plate 11 and the other end resting on the periphery of the through hole 35 (i.e., on the inner shell 30). The main bracket 10 can be connected to the door or window sash while facilitating assembly of the elastic member 40. The structure of the main bracket 10 is relatively simple.
[0045] In one embodiment of the present invention, the free end of the support column 12 includes a cylindrical section 121 with a circular cross section, and the rotating member 50 is composed of a sleeve or bearing sleeved on the cylindrical section 121 of the support column 12. This structure facilitates the assembly of the rotating member 50.
[0046] Accordingly, the through hole 35 on the inner shell 30 is formed by a circular hole, and the diameter of the circular hole is larger than the diameter of the cylindrical section 121. When the main bracket 10 is assembled to the inner shell 30, the cylindrical section 121 of the support column 12 passes through the through hole 35 from the upper side of the inner shell 30 and protrudes to the lower side of the inner shell 30. The rotating member 50 is sleeved on the cylindrical section 121 and is axially fixed by the gasket 80. Figure 3 As shown, the support column 12 and the rotating member 50 are prevented from falling out of the through hole 35.
[0047] In particular, to improve the stability of the support, combined Figure 2-Figure 5 As shown, in one embodiment of the present invention, the main bracket 10 includes two support columns 12 distributed along the third direction Z. The inner shell 30 includes a main body 31 and protrusions 32 connected to the two ends of the main body 31 in the third direction Z (the main body 31 and the two protrusions 32 can be integrated). The bottom surface of the protrusion 32 is higher than the bottom surface of the main body 31, that is, a clearance space is formed below the two protrusions 32, so that the two side panels of the inner shell 30 are T-shaped. The roller 60 is installed on the main body 31 (that is, the second accommodating cavity 33 is located in the main body 31). Each protrusion 32 has a through hole 35 with a central axis arranged along the first direction X. The cylindrical sections 121 of the two support columns 12 respectively pass through the through hole 35 and protrude from the bottom surface of the protrusion 32. In addition, during the sliding process of the inner shell 30 relative to the outer shell 20, the outer periphery of the rotating member 50 on one of the support columns 12 is always in contact with the inner side of the side wall of the outer shell 20. For example Figure 2 In the power-assisting pulley shown, the rotating member 50 on the left support column 12 abuts against the inner side wall of the side plate of the housing 20 .
[0048] In one embodiment of the present invention, the inner shell 30 further includes a third accommodating cavity. For example, the inner shell 30 includes third accommodating cavities respectively located at the two protrusions 32, and each third accommodating cavity has a fourth opening at the top, and the through hole 35 is located at the bottom of the third accommodating cavity. The free end of the support column 12 passes through the fourth opening, the third accommodating cavity and the through hole 35 in sequence and is axially fixed by the gasket 80 below the through hole 35.
[0049] In one embodiment of the present invention, the cross-sectional shape of the support column 12 matches the shape of the through-hole 35, and the cross-sectional dimensions of the support column 12 gradually decrease from the root (i.e., the portion connected to the fixing plate 11) to the cylindrical section. Furthermore, the cross-sectional dimensions of the support column 12 near the cylindrical section are smaller than the dimensions of the through-hole 35, while the cross-sectional dimensions near the root are larger than the dimensions of the through-hole 35. In this manner, the length of the support column 12 passing through the through-hole 35 can be limited by the support column 12 itself, thereby limiting the sliding movement of the support column 12 relative to the inner shell 30 in the first direction X.
[0050] In one embodiment of the present invention, the bottom of the housing 20 may have a fixing portion 25 for connecting to a lifting rod (i.e., a transmission component). To facilitate assembly of the lifting rod, the bottom of the housing 20 has clearances at both ends along the third direction Z, thereby forming a T-shaped two-plate portion of the housing 20. The fixing portion 25 is disposed within these clearances. In actual applications, the housing 20 may also be assembled with the transmission component through other methods, which will not be further described here.
[0051] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.
Claims
1. A power pulley used for lifting sliding doors or lifting sliding windows, characterized in that: The power-assist pulley comprises a main bracket, an outer shell, an inner shell, an elastic member, a rotating member and a roller, and the power-assist pulley is assembled to the bottom of the door or window sash through the main bracket; The rotating member is rotatably connected to the main bracket, and the main bracket is mounted to the inner shell, and the outer periphery of the rotating member protrudes from two side walls of the inner shell that are perpendicular to the first direction; the elastic member is mounted between the main bracket and the inner shell, and applies an elastic force to the main bracket along the second direction through an elastic restoring force; the roller is mounted to the inner shell through a rotating shaft arranged along the first direction, and the inner shell is mounted in the outer shell, and at least a portion of the main bracket is exposed above the outer shell, and the bottom of the roller protrudes to the bottom of the inner shell and the bottom of the outer shell respectively, and the rotating member limits the movement of the inner shell relative to the outer shell along the third direction by abutting against the inner sides of two side walls of the outer shell that are perpendicular to the first direction and rotating relative to the main bracket; the first direction, the second direction and the third direction are perpendicular to each other.
2. The power pulley according to claim 1, characterized in that: The outer shell includes a first accommodating cavity, and the first accommodating cavity includes a first opening located at the top of the outer shell and a second opening located at the bottom of the outer shell; the inner shell includes a second accommodating cavity, and the second accommodating cavity includes a third opening located at the bottom of the inner shell, and the bottom of the roller protrudes to the bottom of the inner shell through the third opening; the inner shell is installed in the first accommodating cavity of the outer shell, and the bottom of the roller protrudes to the bottom of the outer shell through the second opening.
3. The power pulley according to claim 2, characterized in that: The two side walls of the first accommodating cavity perpendicular to the first direction respectively have guide windows, the size of the guide windows in the third direction is larger than the size of the inner shell in the third direction, and when the inner shell is installed in the first accommodating cavity, the two sides of the inner shell are respectively embedded in the two guide windows.
4. The power pulley according to claim 1, characterized in that: The main bracket includes a fixing plate and a support column, the fixing plate protrudes above the outer shell, and the support column is vertically connected to the fixing plate along a first direction; the inner shell has a through hole with a central axis arranged along the first direction, and the support column is slidably connected in the through hole along the first direction; the elastic member is composed of a spring sleeved on the support column, and one end of the spring rests on the fixing plate, and the other end of the spring rests on the outer periphery of the through hole.
5. The power pulley according to claim 4, characterized in that: The free end of the support column comprises a cylindrical section with a circular cross section, and the rotating member is composed of a sleeve or a bearing sleeved on the cylindrical section of the support column.
6. The power pulley according to claim 5, characterized in that: The through hole is composed of a circular hole, and the diameter of the circular hole is larger than the diameter of the cylindrical section; the cylindrical section of the support column passes through the through hole and protrudes below the inner shell, and the rotating part is sleeved on the cylindrical section and axially fixed by a gasket.
7. The power-assisting pulley according to claim 6, characterized in that: The main bracket includes two support columns distributed along the third direction, the inner shell includes a main body and protrusions respectively connected to the two ends of the main body in the third direction, and the bottom surface of the protrusion is higher than the bottom surface of the main body; the roller is mounted on the main body, each protrusion has a through hole with a central axis arranged along the first direction, the cylindrical sections of the two support columns respectively pass through the through holes and protrude from the bottom surface of the protrusion, and during the sliding process of the inner shell relative to the outer shell, the outer periphery of a rotating part on a support column is always in contact with the inner side of the side wall of the outer shell.
8. The power-assisting pulley according to claim 5, characterized in that: The inner shell includes a third accommodating cavity, and the top of the third accommodating cavity has a fourth opening. The through hole is located at the bottom of the third accommodating cavity. The free end of the support column passes through the fourth opening, the third accommodating cavity and the through hole in sequence and is axially fixed by a gasket under the through hole.
9. The power-assisting pulley according to claim 8, characterized in that: The cross-sectional shape of the support column is adapted to the shape of the through hole, and the size of the cross-sectional area of the support column gradually decreases from the root to the cylindrical section, and the size of the cross-sectional area of the support column close to the cylindrical section is smaller than the size of the through hole, and the size of the cross-sectional area close to the root is larger than the size of the through hole.
10. The power pulley according to any one of claims 1 to 9, characterized in that: The housing is provided with a fixing portion for connecting the lifting rod.