A hand-cranked screw window opener
By introducing a buffer pad and a convex-concave mating structure into the hand-cranked screw window opener, combined with bevel gear transmission, the impact problem at extreme positions is solved, the stability and translation effect of the components are achieved, and the user experience is improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUZHOU NANXUN WANRONG CHAIN MASCH MANUFACTUNING CO LTD
- Filing Date
- 2025-07-21
- Publication Date
- 2026-07-17
AI Technical Summary
The existing hand-cranked screw window opener generates an impact at the extreme position, resulting in component wear and noise. Furthermore, the rotation of the screw nut causes the push rod to rotate as well, affecting the performance and reliability.
The design employs an upper and lower buffer pad structure and a concave-convex fit design, combined with bevel gear transmission in the transmission component, to ensure that the lead screw nut does not rotate during movement. The buffer pads reduce impact and enable the sliding window opening action.
It reduces component wear, decreases noise, ensures the stability and accuracy of the window opener, and extends its service life.
Smart Images
Figure CN224515001U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of window opener technology, specifically to a hand-cranked screw window opener. Background Technology
[0002] In existing hand-cranked screw window opener technology, significant impacts occur between the screw nut, positioning seat, and push rod seat when the push rod is extended or returned to its limit position. Due to the lack of an effective buffer structure, frequent impacts not only accelerate the wear of components such as the screw nut, positioning seat, and push rod seat, reducing their service life, but also cause the window opener to generate significant noise during operation, affecting the user experience.
[0003] Furthermore, traditional hand-cranked screw window openers have shortcomings in the connection design between the screw tube and the lead screw nut. The lead screw nut is prone to rotation during movement, and since the lead screw nut and push rod are usually rigidly connected, once the lead screw nut rotates, it will cause the push rod to rotate as well. This rotation of the push rod prevents the window opener from achieving stable and precise translational window opening action, seriously affecting the window opener's performance and reliability.
[0004] Therefore, this utility model provides a hand-cranked screw window opener. Utility Model Content
[0005] The purpose of this invention is to provide a hand-cranked screw window opener.
[0006] To solve the above-mentioned technical problems, the purpose of this utility model is achieved as follows: A hand-cranked screw window opener includes: a screw mounting and fixing tube, wherein the screw mounting and fixing tube is fixedly installed on one side of the window; A gearbox, rotatably connected to the screw mounting tube, having an internal mounting space and a transmission assembly disposed within the mounting space; the transmission assembly is connected to a rocker assembly disposed at the edge of the window via a connecting rod; A screw tube is fixedly mounted on the gearbox, and a lead screw is rotatably mounted inside it; the top end of the lead screw is connected to the rocker arm assembly through the transmission assembly to realize torque transmission; a positioning seat is sleeved on the top end of the lead screw; the positioning seat is fixedly connected to the screw tube, and a first buffer pad is provided at its bottom; A lead screw nut is threaded onto the lead screw, and a push rod and a second buffer pad are connected to its bottom end; the push rod is sleeved on the outside of the lead screw, and its bottom end extends to the outside of the lead screw tube and connects to the window; the second buffer pad is sleeved on the outside of the push rod. The outer peripheral wall of the lead screw nut is provided with several protrusions; the protrusions are adapted to the grooves formed on the inner wall of the lead screw tube.
[0007] Based on the above scheme and as a preferred embodiment of the above scheme, the transmission assembly includes a first bevel gear and a second bevel gear that mesh with each other; a first shaft is inserted into the center of the first bevel gear; the first shaft extends to the outside of the gearbox and is connected to the connecting rod for transmission; a second shaft is inserted into the center of the second bevel gear; the second shaft extends into the screw tube and is connected to the lead screw for transmission.
[0008] Based on the above scheme and as a preferred embodiment of the above scheme, a connecting sleeve is provided at the top of the lead screw; the connecting sleeve is fitted outside the second shaft to realize torque transmission.
[0009] Based on the above scheme and as a preferred embodiment of the above scheme, a bearing is sleeved on the top of the lead screw; the bearing is located above the positioning seat.
[0010] Based on the above scheme and as a preferred embodiment of the above scheme, the bottom of the screw tube is open, and a push rod seat that is detachably connected to the screw tube is provided at the opening; the push rod seat has a through hole for the push rod to pass through.
[0011] Based on the above scheme and as a preferred embodiment, the push rod has openings at both ends and internal threads on the inner side of the openings; a mating rod is threaded to the top of the push rod, and a connecting lug is threaded to the bottom end; the mating rod has a central hole with internal threads to be threaded onto the lead screw, external threads on its outer wall, and a polygonal connecting part with a size larger than its outer diameter at the top; the mating rod is inserted into a through hole in the center of the lead screw nut, and the connecting part is adapted to the mating groove at the top of the through hole; the connecting lug is connected to the window.
[0012] Compared with the prior art, this utility model has the following advantages and beneficial effects: This utility model sets two buffer pads, upper and lower, on the screw assembly, which provides a buffering effect when the push rod is pushed out or returned to its extreme positions, greatly reducing the impact between the screw nut, the positioning seat, and the push rod seat, thus extending the service life of the components. The connection between the screw tube and the screw nut adopts a concave-convex fit structure, preventing the screw nut from rotating during movement. Because the screw nut and the push rod are rigidly connected, the push rod can only translate and not rotate when the screw is rotated, thus solving the problem of the push rod rotating with the screw. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model.
[0014] Figure 2 This is a schematic diagram of the internal structure of the gearbox and the top structure of the lead screw of this utility model.
[0015] Figure 3 This is a schematic diagram of the exploded structure of the screw tube of this utility model.
[0016] Figure 4 for Figure 3 Enlarged view of a portion of the diagram.
[0017] In the diagram: 1. Screw mounting tube; 2. Gearbox; 3. Screw tube; 4. Lead screw; 5. Connecting rod; 6. Rocker assembly; 7. Positioning seat; 8. First buffer pad; 9. Lead screw nut; 10. Window; 11. Second buffer pad; 12. Push rod; 13. Protrusion; 14. First bevel gear; 15. Second bevel gear; 16. First shaft; 17. Second shaft; 18. Connecting sleeve; 19. Bearing; 20. Push rod seat; 21. Matching rod; 22. Connecting ear; 23. Connecting part. Detailed Implementation
[0018] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. However, it should be understood that the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. For better illustration of this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.
[0019] like Figure 1 As shown, a hand-cranked screw window opener includes: a screw mounting and fixing tube 1, a gearbox 2, a screw tube 3, and a lead screw nut 9.
[0020] The screw mounting tube 1 is fixedly installed on one side of the window 10.
[0021] The gearbox 2 is rotatably connected to the screw mounting tube 1, and has an internal mounting space within which a transmission assembly is installed. The transmission assembly is connected to a rocker assembly 6 located at the edge of the window 10 via a connecting rod 5. Specifically, a corner bracket at the same horizontal level as the gearbox 2 is fixedly connected to the side of the window 10. The corner bracket is connected to the transmission assembly inside the gearbox 2 via the connecting rod 5. A downward-extending rocker arm is located below the rocker arm, with its top end connected to the corner bracket and its bottom extending to a position accessible to the user for rotation. The rocker arm is vertical, perpendicular to the connecting rod 5, and is connected via the corner bracket.
[0022] Preferably, such as Figure 2As shown, the transmission assembly includes a first bevel gear 14 and a second bevel gear 15 that mesh with each other. A first shaft 16 is inserted into the center of the first bevel gear 14. The first shaft 16 is fixed in position and rotatably disposed inside the gearbox 2, with one end extending outside the gearbox 2 and drivingly connected to the connecting rod 5. A second shaft 17 is inserted into the center of the second bevel gear 15. The second shaft 17 is fixed in position and rotatably disposed inside the gearbox 2, extending downwards to the bottom of the gearbox 2 for drivingly connecting to components below. The first shaft 16 is horizontally positioned, and the second shaft 17 is vertically positioned.
[0023] The internal structure of the corner gear is similar to that of the gearbox 2, both including two meshing bevel gears. A shaft is inserted into the center of each bevel gear. The horizontally positioned shaft is connected to the first shaft 16 via the connecting rod 5, and the vertically positioned shaft is connected to the rocker arm.
[0024] like Figure 3 and Figure 4 As shown, the screw tube 3 is fixedly mounted at the bottom of the gearbox 2, and a lead screw 4 is rotatably mounted inside it. The top of the screw tube 3 is fixedly connected to the bottom of the gearbox 2, and the bottom is open. A push rod seat 20, which is detachably connected to the screw tube 3, is provided at the opening. The push rod seat 20 has a through hole for the push rod 12 inside the screw tube 3 to extend out. Preferably, the push rod seat 20 has an external thread on its outer circumference, which mates with the internal thread on the inner wall of the screw tube 3 to achieve a threaded connection between the two.
[0025] The top of the lead screw 4 is connected to the rocker arm assembly 6 through a transmission component to transmit torque. When the operator turns the rocker arm assembly 6, the lead screw 4 can be driven to rotate.
[0026] A positioning seat 7 is fitted onto the top of the lead screw 4, and the positioning seat 7 is fixedly connected to the screw tube 3. A first buffer pad 8 is provided at the bottom of the positioning seat 7, which is fitted onto the lead screw 4 to buffer the impact when the lead screw nut 9 moves to its extreme position. A screw hole is formed on the outer periphery of the positioning seat 7, and a corresponding through hole is formed on the screw tube 3. A screw passes through the through hole and engages with the screw hole to achieve a fixed connection between the positioning seat 7 and the screw tube 3. The through hole is wider at the top and narrower at the bottom to limit the screw's position.
[0027] A connecting sleeve 18 is fixedly installed at the top of the lead screw 4. The connecting sleeve 18 is fitted onto the outside of the second shaft 17 to achieve torque transmission. The second shaft 17 has a polygonal cross-section, and its connection with the connecting sleeve 18 enables torque transmission. At the same time, the abutment between the connecting sleeve 18 and the second shaft 17 restricts the upward movement of the lead screw 4, while the positioning seat 7 restricts the downward movement of the lead screw 4. The cooperation of these two elements limits the position of the lead screw 4, allowing it to rotate only in place.
[0028] Meanwhile, a bearing 19 is fitted on the top of the lead screw 4. The bearing 19 is located above the positioning seat 7. The inner ring is fixedly engaged with the lead screw 4, and the outer ring is fixedly engaged with the inner wall of the screw tube 3, so that the lead screw 4 can rotate.
[0029] The lead screw nut 9 is threaded onto the lead screw 4 and located inside the lead screw tube 3. Its bottom end is connected to a push rod 12 and a second buffer pad 11. The push rod 12 is fitted onto the outside of the lead screw 4, its top end is fixedly connected to the lead screw nut 9, and its bottom end extends to the outside of the lead screw tube 3 and connects to the window 10. The push rod 12 moves along the axis of the lead screw 4 with the lead screw nut 9, thereby opening and closing the window 10.
[0030] Specifically, the push rod 12 has openings at both ends, with internal threads on the inner side of the openings. A mating rod 21 is threadedly connected to the top of the push rod 12, and a connecting lug 22 is threadedly connected to the bottom. The mating rod 21 has a central hole with internal threads to be threaded onto the lead screw 4, and external threads on its outer wall to engage with the push rod 12. A polygonal connecting portion 23, larger than its outer diameter, is located at the top of the mating rod 21. The mating rod 21 is inserted into a through hole in the center of the lead screw nut 9, and the connecting portion 23 is fitted with a mating groove at the top of the through hole to restrict the mating rod 21. By clamping the lead screw nut 9 with the top of the push rod 12 and the connecting portion 23, a detachable and fixed connection between the push rod 12 and the lead screw nut 9 can be achieved.
[0031] Connect ear 22 to window 10.
[0032] The second buffer pad 11 is fitted over the outside of the push rod 12 to buffer the impact when the lead screw nut 9 moves downward to its limit position.
[0033] The lead screw nut 9 has several protrusions 13 on its outer peripheral wall. The protrusions 13 are adapted to the grooves formed on the inner wall of the screw tube 3, so that the lead screw nut 9 can move relative to the screw tube 3 but cannot rotate. The protrusions 13 are evenly distributed along the circumference of the lead screw nut 9.
[0034] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.
Claims
1. A hand-operated screw window opener characterized by, include: The screw mounting and fixing tube (1) is fixedly installed on one side of the window (10); The gearbox (2) is rotatably connected to the screw mounting tube (1), has an internal installation space and a transmission assembly is provided in the installation space; the transmission assembly is connected to the rocker assembly (6) provided on the edge of the window (10) via a connecting rod (5); A screw tube (3) is fixedly mounted on the gearbox (2), and a lead screw (4) is rotatably mounted inside it; the top end of the lead screw (4) is connected to the rocker arm assembly (6) through the transmission assembly to realize torque transmission; a positioning seat (7) is sleeved on the top of the lead screw (4); the positioning seat (7) is fixedly connected to the screw tube (3), and a first buffer pad (8) is provided at its bottom; A lead screw nut (9) is threaded onto the lead screw (4), and its bottom end is connected to a push rod (12) and a second buffer pad (11); the push rod (12) is sleeved on the outside of the lead screw (4), and its bottom end extends to the outside of the screw tube (3) and is connected to the window (10); the second buffer pad (11) is sleeved on the outside of the push rod (12); The outer peripheral wall of the lead screw nut (9) is provided with a number of protrusions (13); the protrusions (13) are adapted to the grooves opened on the inner wall of the lead screw tube (3).
2. A hand-operated screw window opener according to claim 1, wherein The transmission assembly includes a first bevel gear (14) and a second bevel gear (15) that mesh with each other; a first shaft (16) is inserted into the center of the first bevel gear (14); the first shaft (16) extends to the outside of the gearbox (2) and is connected to the connecting rod (5) in a transmission connection; a second shaft (17) is inserted into the center of the second bevel gear (15); the second shaft (17) extends into the screw tube (3) and is connected to the lead screw (4) in a transmission connection.
3. A hand-operated screw window opener according to claim 2, wherein The top end of the lead screw (4) is provided with a connecting sleeve (18); the connecting sleeve (18) is fitted around the outside of the second shaft (17) to realize torque transmission.
4. A hand-operated screw window opener according to claim 1, wherein The top of the lead screw (4) is fitted with a bearing (19); the bearing (19) is located above the positioning seat (7).
5. A hand-operated screw window opener according to claim 1, wherein, The bottom of the screw tube (3) is open, and a push rod seat (20) that is detachably connected to the screw tube (3) is provided at the opening; the push rod seat (20) has a through hole for the push rod (12) to pass through.
6. A hand crank screw window opener according to claim 1 wherein, The push rod (12) has openings at both ends and internal threads on the inside of the openings; the top end of the push rod (12) is threaded to a mating rod (21) and the bottom end is threaded to a connecting lug (22); the mating rod (21) has a central hole and internal threads to be threaded onto the lead screw (4), external threads on the outer wall and a polygonal connecting part (23) with a size larger than the outer diameter on the top; the mating rod (21) is inserted into the through hole in the center of the lead screw nut (9), and the connecting part (23) is adapted to the mating groove on the top of the through hole; the connecting lug (22) is connected to the window (10).