Tensioning device for elevator speed governor
By adopting a vertical guide slide and elastic drive component design in the elevator speed governor, combined with a limit switch, the problems of bulkiness, complexity and general stability of existing tensioning devices are solved, achieving structural simplification, cost reduction and improved stability, and providing flexible installation and automatic detection functions.
Patent Information
- Application Number
- CN202411031450.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2026-01-30
AI Technical Summary
Existing elevator speed governor tensioning devices are bulky, costly, complex, require advanced installation techniques, have limited installation options, and generally lack stability.
The system employs vertically distributed guide slides and elastic drive components, combined with limit switches, to achieve stable vertical movement of the tensioning wheel. The force of the elastic drive components tensions the speed limiter wire rope, and the limit switches detect the slack of the wire rope.
It simplifies the structure of the tensioning device, reduces costs, improves stability and adaptability, enables flexible installation, detects wire rope slack, and reminds users of maintenance procedures.
Smart Images
Figure CN121425932A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of elevator equipment technology, and in particular to a tensioning device for an elevator speed governor. Background Technology
[0002] Existing elevator speed governor tensioning devices generally use a method of adding a heavy iron block to the tensioning wheel mounting bracket to achieve tensioning of the speed governor wire rope. This results in a relatively bulky overall structure and high cost. In addition, the tensioning devices currently used in the market also have the following problems: (1) complex structure and high requirements for the installation process between components, resulting in high manufacturing and processing costs; (2) single installation form and general adaptability; (3) due to the use of a single limit stroke, the stability of the tensioning process is generally poor. Summary of the Invention
[0003] The purpose of this invention is to provide a new type of tensioning device for elevator speed governors, which simplifies the structure of the tensioning device, reduces costs, and increases the adaptability and stability of the tensioning device, thus effectively solving the problems of conventional tensioning devices mentioned in the background art.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] A tensioning device for an elevator speed governor includes a fixed frame and a tensioning wheel. The fixed frame is slidably connected to a guide plate, and the tensioning wheel is rotatably connected to the guide plate. The guide plate slides vertically. An elastic drive member is connected between the guide plate and the fixed frame to maintain the downward movement of the guide plate. A limit switch is installed on the fixed frame, and a switch pressure plate is provided on the guide plate above the limit switch.
[0006] Furthermore, the guide slide plate has a clearance through hole corresponding to the position of the elastic drive member.
[0007] Furthermore, the clearance through hole is elongated and distributed along the sliding direction of the guide slide plate.
[0008] Furthermore, the guide slide plate is provided with a protective cover on the side surface away from the fixing frame, and the protective cover completely covers the avoidance through hole or partially covers the avoidance through hole.
[0009] Furthermore, the elastic drive component is a spring, one end of which is connected to the guide slide plate, and the other end of which is connected to the fixing frame.
[0010] Furthermore, the fixing frame has a sliding groove on the side surface near the guide slide plate that is slidably connected to the guide slide plate. The sliding groove is formed by two limiting buckles symmetrically distributed on both sides of the guide slide plate.
[0011] Furthermore, the limiting buckle includes a limiting plate, a connecting plate, and a fixing plate that are vertically connected in sequence. The fixing plate is fixedly connected to the surface of the fixing frame. The limiting plate and the guide slide are distributed parallel to each other on the surface away from the fixing frame. The connecting plate is distributed in the vertical direction.
[0012] Furthermore, at least two fixing frames are provided, and the length direction of each fixing frame is perpendicular to the length direction of the guide slide.
[0013] Furthermore, the guide slide plate is provided with a fixed shaft for mounting the tension wheel. The fixed shaft is perpendicular to the surface of the guide slide plate on the side away from the fixed frame, and the tension wheel is rotatably connected to the fixed shaft through a rolling bearing.
[0014] Furthermore, the fixing frame is provided with a guide rail clamp at the end away from the guide slide plate.
[0015] Compared with the prior art, the present invention provides a tensioning device for elevator speed governors, which has the following advantages:
[0016] This invention, by mounting the tensioning wheel on a vertically distributed guide plate, utilizes the force of an elastic drive component to cause the tensioning wheel to move downwards vertically under the influence of the guide plate, thereby tensioning the speed governor wire rope. Simultaneously, since the guide plate can only slide vertically up and down, the tensioning device's travel is more stable and less prone to tilting. Furthermore, by incorporating a limit switch, it is possible to detect whether the speed governor wire rope has slacked beyond the specified length, thus prompting the need for speed governor wire rope maintenance.
[0017] This invention has a simple structure, low cost, and strong stability; it can also be arranged in both directions, allowing for flexible installation according to the actual installation space, making it highly adaptable. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the structure of Example 1;
[0020] Figure 2 For along Figure 1 A cross-sectional view along the AA direction;
[0021] Figure 3 A schematic diagram of a speed limiter wire rope with a top-mounted tensioning device and tension spring.
[0022] Figure 4 This is a schematic diagram of the tensioning process using a top-mounted tensioning device;
[0023] Figure 5 A schematic diagram of a speed limiter wire rope with a bottom-mounted tensioning device and a compression spring.
[0024] Figure 6 This is a schematic diagram of the tensioning process using a bottom-mounted tensioning device.
[0025] Reference numerals in the attached diagram: 1. Fixing frame; 11. Slide groove; 12. Limit buckle; 121. Limiting plate; 122. Connecting plate; 123. Fixing plate; 13. Guide rail clamp; 2. Tensioning wheel; 21. Rolling bearing; 3. Guide slide plate; 31. Clearance through hole; 32. Protective cover; 33. Fixing shaft; 4. Spring; 5. Limit switch; 6. Switch pressure plate; 7. Machine room base plate; 8. Speed limiter rope wheel; 9. Speed limiter wire rope; 10. Guide rail. Detailed Implementation
[0026] The technical solution of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0027] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0028] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature and the second feature are in direct contact, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0030] The present invention will now be described in further detail through detailed embodiments and in conjunction with the accompanying drawings.
[0031] Example 1
[0032] Please refer to Figures 1-4 This embodiment provides a tensioning device for an elevator speed governor, including a fixed frame 1 and a tensioning wheel 2. The fixed frame 1 is slidably connected to a guide plate 3, and the tensioning wheel 2 is rotatably connected to the guide plate 3. The guide plate 3 slides vertically. An elastic drive member connects the guide plate 3 to the fixed frame 1, maintaining the downward movement of the guide plate 3. A limit switch 5 is installed on the fixed frame 1, and a switch pressure plate 6 is located above the limit switch 5 on the guide plate 3. By installing the tensioning wheel on the vertically distributed guide plate, the elastic drive member allows the tensioning wheel to move downwards vertically under the drive of the guide plate, thus tensioning the speed governor wire rope. Simultaneously, since the guide plate can only slide vertically, the tensioning device's travel is more stable and less prone to tilting. Furthermore, by setting a limit switch, it is possible to detect whether the speed governor wire rope has slackened beyond the specified length, thus prompting a maintenance procedure for the speed governor wire rope.
[0033] In some specific implementation methods, refer to Figure 1The guide slide plate 3 has clearance through holes 31 corresponding to the position of the elastic drive component, thereby freeing up a suitable space for installing the elastic drive component. Specifically, the clearance through holes 31 are elongated and distributed along the sliding direction of the guide slide plate 3.
[0034] As an improved implementation method, refer to Figure 1 The guide slide plate 3 is provided with a protective cover 32 on the side surface away from the fixed frame 1. The protective cover 32 can completely cover the avoidance through hole or cover part of the avoidance through hole, so as to prevent the elastic drive component from being stuck by external foreign objects and affecting its normal operation.
[0035] In some specific implementation methods, refer to Figure 2 The fixing frame 1 has a sliding groove 11 on its surface near the guide slide plate 3, which is slidably connected to the guide slide plate 3. The sliding groove 11 is formed by two limiting buckles 12 symmetrically distributed on both sides of the guide slide plate 3. Specifically, the limiting buckle 12 includes a limiting plate 121, a connecting plate 122, and a fixing plate 123 connected vertically in sequence. The fixing plate 123 is fixedly connected to the surface of the fixing frame 1. The limiting plate 121 and the guide slide plate 3 are distributed parallel to each other on the surface away from the fixing frame 1, and the connecting plate 122 is distributed in a vertical direction. In this way, the limiting buckle can be used to install the guide slide plate, and the fixing frame and the guide slide plate are designed as separate structures, which facilitates processing and manufacturing and quick assembly.
[0036] In some specific implementation methods, refer to Figure 1 and Figure 2 The guide slide plate 3 is provided with a fixed shaft 33 for mounting the tension wheel 2. The fixed shaft 33 is perpendicular to the surface of the guide slide plate 3 on the side away from the fixed frame 1. The tension wheel 2 is rotatably connected to the fixed shaft 33 through a rolling bearing 21.
[0037] In some specific implementation methods, refer to Figure 3 and Figure 4 The fixing frame 1 has a guide rail clamp 13 at the end away from the guide slide plate 3. In this way, the tensioning device can be fixed on the guide rail by the guide rail clamp.
[0038] In this embodiment, reference Figures 1-4Two fixing frames 1 are provided, with the length direction of each fixing frame 1 perpendicular to the length direction of the guide slide plate 3. Thus, by providing two fixing frames, a double-limiting structure can be formed using the limiting buckles on the two fixing frames, further stabilizing the travel of the tensioning device. In other embodiments, three, four, or more fixing frames can be provided as needed to further improve the stability of the travel of the tensioning device; furthermore, in some embodiments, the height of the fixing frames and the length of the slide groove can be greatly increased, thereby achieving a similar effect to providing multiple fixing frames and limiting buckles.
[0039] In some specific implementation methods, refer to Figures 1-4 Limit switch 5 is mounted on the mounting bracket 1 located below.
[0040] In this embodiment, the elastic driving element is spring 4. (Reference) Figures 1-4 The tension wheel 2 is mounted on top, meaning it is rotatably mounted on the upper end of the guide slide plate 3. The upper end of the spring 4 is connected to the upper edge of the clearance hole 31 on the guide slide plate 3, and the lower end of the spring 4 is connected to the fixing bracket 1 located below. After installation, the spring is in a stretched state under normal operating conditions, thus providing a downward pulling force. As an example, a tension spring can be used.
[0041] The tensioning wheel is mounted on the top: such as Figure 3 As shown, during installation and use, the two fixing brackets 1 are fixed to the guide rail 10 using the guide rail clamps 13 according to the installation dimensions. The speed limiter is installed on the machine room floor 7, and the speed limiter rope pulley 8 is installed on the speed limiter. Pulling the tension pulley 2 upward stretches the spring 4, and the speed limiter wire rope 9 is wound around the speed limiter rope pulley 8 and the tension pulley 2; then, the tension pulley 2 is released, and the spring 4 has a continuous downward pulling force in the initial stage, thereby achieving the tension of the speed limiter wire rope and enabling the tension pulley to operate synchronously with the speed limiter rope pulley.
[0042] As time goes by, such Figure 4 As shown, when the speed limiter wire rope 9 slacks to an excessive length, the downward restoring force of the spring 4 causes the switch plate 6 to move down and press against the limit switch 5, stopping the entire tensioning process and entering the speed limiter wire rope maintenance procedure.
[0043] Example 2
[0044] Please refer to Figure 5 and Figure 6This embodiment provides another tensioning device for an elevator speed governor. Unlike embodiment 1, the tensioning wheel 2 is installed at the bottom, meaning it is rotatably mounted on the lower end of the guide slide plate 3. The lower end of the spring 4 is connected to the lower edge of the clearance hole 31 on the guide slide plate 3, and the upper end of the spring 4 is connected to the upper fixing bracket 1. After installation, the spring 4 is in a compressed state under normal operating conditions, thus providing a downward springing thrust. As an example, the spring 4 can be a compression spring.
[0045] The tensioning roller is installed at the bottom: During installation and use, such as... Figure 5 As shown, two mounting brackets 1 are fixed to the guide rail 10 using guide rail clamps 13 according to the installation dimensions. The speed limiter is installed on the machine room floor, and the speed limiter pulley 8 is installed on the speed limiter pulley. Pulling the tension wheel 2 upward compresses the spring 4, winding the speed limiter wire rope 9 around the speed limiter pulley 8 and the tension wheel 2; then, releasing the tension wheel 2, the spring 4 has a continuous downward thrust in the initial stage, thereby achieving the tension of the speed limiter wire rope and enabling the tension wheel to operate synchronously with the speed limiter pulley.
[0046] As time goes by, such Figure 6 As shown, when the speed limiter wire rope 9 slacks to an excessive length, the downward restoring force of the spring 4 causes the switch plate 6 to move down and press against the limit switch 5, stopping the entire tensioning process and entering the speed limiter wire rope maintenance procedure.
[0047] Furthermore, it should be noted that in other embodiments, the elastic drive element may be any other structural type with retraction and extension capabilities, in addition to springs.
[0048] The above embodiments are merely illustrative of the concept and technical solution of the present invention and are not intended to limit the present invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.
[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A tensioning device for an elevator speed governor comprising a stationary frame and a tensioning wheel, characterized in that, The fixed frame is slidably connected with a guide slide plate, the tensioning wheel is rotationally connected with the guide slide plate, the sliding direction of the guide slide plate is distributed along the vertical direction; the guide slide plate is connected with the fixed frame through an elastic driving member, the elastic driving member is used for maintaining the guide slide plate to keep moving downward; the fixed frame is installed with a travel switch, and the guide slide plate is provided with a switch pressing plate above the travel switch.
2. A tensioning device for an elevator governor according to claim 1, characterized in that The guide slide plate is provided with an avoiding through hole corresponding to the position of the elastic driving member.
3. A tensioning device for an elevator governor according to claim 2, characterized in that The avoiding through hole is in a strip shape, and the avoiding through hole is distributed along the sliding direction of the guide slide plate.
4. A tensioning device for an elevator governor according to claim 2, characterized in that The guide slide plate is provided with a protective cover on the side surface away from the fixed frame, and the protective cover completely covers the avoiding through hole or covers part of the avoiding through hole.
5. The tensioning device for an elevator governor according to claim 1, characterized in that, The elastic driving member is a spring, one end of the spring is connected with the guide slide plate, and the other end of the elastic driving member is connected with the fixed frame.
6. The tensioning device for an elevator governor according to claim 1, characterized in that The fixed frame is provided with a sliding groove slidably connected with the guide slide plate on the side surface close to the guide slide plate, and the sliding groove is formed by two limiting buckles symmetrically distributed on both sides of the guide slide plate.
7. A tensioning device for an elevator governor according to claim 6, characterized in that The limiting buckles include limiting plates, connecting plates and fixed plates which are vertically connected in sequence, the fixed plates are fixedly connected with the surface of the fixed frame, the limiting plates are parallelly distributed on the side surface of the guide slide plate away from the fixed frame, and the connecting plates are distributed along the vertical direction.
8. A tensioning device for an elevator governor according to claim 7, characterized in that The fixed frame is provided with at least two, and the length direction of each fixed frame is perpendicular to the length direction of the guide slide plate.
9. The tensioning device for an elevator governor according to claim 1, characterized in that The guide slide plate is provided with a fixing shaft for installing the tensioning wheel, the fixing shaft is perpendicular to the side surface of the guide slide plate away from the fixed frame, and the tensioning wheel is rotationally connected with the fixing shaft through a rolling bearing.
10. A tensioning device for an elevator governor according to any one of claims 1 to 9, characterized in that The fixed frame is provided with a guide rail pressing code away from the guide slide plate.