A counterweight tensioning device

Abstract

This utility model discloses a counterweight tensioning device, relating to the field of elevator safety technology. It includes a tensioning assembly and a counterweight assembly. The tensioning assembly includes a fixed mounting plate, a connecting cantilever, and a tensioning wheel. One end of the connecting cantilever is rotatably connected to the fixed mounting plate, and the tensioning wheel is located at the other end of the connecting cantilever and rotatably connected to one side of the connecting cantilever. The counterweight assembly includes a pair of counterweights, one of which is located on one side of the connecting cantilever, and the other on one side of the tensioning wheel. The pair of counterweights are detachably connected to the connecting cantilever via a connecting structure. This invention solves the problem of installation difficulties, or even the inability to install smoothly, of current tensioning devices when the shaft size is limited or the pit height is limited.

Description

Technical Field

[0001] This utility model relates to the field of elevator safety technology, specifically to a counterweight side tensioning device. Background Technology

[0002] The counterweight tensioning device is an auxiliary device used in the elevator speed limiting mechanism. Its function is to keep the linkage wire rope taut by tensioning it, ensuring that there is a certain friction between the linkage wire rope and the speed limiter, preventing slippage between the linkage wire rope and the speed limiter, thereby ensuring that the elevator speed limiting mechanism can work normally.

[0003] The counterweight tensioning device needs to be installed in the elevator shaft pit. However, because current counterweight tensioning devices require additional counterweights, their dimensions in the width or height directions are often quite large. This large size can lead to installation difficulties, or even prevent successful installation, when the shaft dimensions are limited or the pit's net height is limited.

[0004] A tensioning device for an elevator speed limiting mechanism is disclosed in utility model application number CN202122862608.3. However, it still faces installation difficulties, or even the inability to install smoothly, when the shaft size is limited or the pit clearance is limited. Therefore, there is an urgent need for a new type of counterweight-side tensioning device to solve the problem of installation difficulties, or even the inability to install smoothly, of the current tensioning device when the shaft size is limited or the pit clearance is limited. Utility Model Content

[0005] Based on this, and in response to the above problems, this utility model proposes a counterweight side tensioning device, which solves the problem that current tensioning devices are difficult to install, or even impossible to install smoothly, when the shaft size is relatively small or the net height of the pit is limited.

[0006] The technical solution of this utility model is:

[0007] A counterweight tensioning device includes a tensioning assembly and a counterweight assembly. The tensioning assembly includes a fixed mounting plate, a connecting cantilever, and a tensioning wheel. One end of the connecting cantilever is rotatably connected to the fixed mounting plate, and the tensioning wheel is located at the other end of the connecting cantilever and is rotatably connected to one side of the connecting cantilever. The counterweight assembly includes a pair of counterweights, one of which is located on one side of the connecting cantilever and the other is located on one side of the tensioning wheel. The pair of counterweights are detachably connected to the connecting cantilever via a connecting structure.

[0008] Preferably, the connecting structure includes a pair of first connecting members, which are disposed between a pair of counterweights and located on both sides of the pair of counterweights. Each first connecting member includes a first connecting screw, a first U-shaped block, and a pair of first locking nuts. The first U-shaped block is disposed between the pair of counterweights, with one side of the first U-shaped block contacting the counterweight located on the side of the tension wheel and the other side contacting the side of the connecting cantilever. The first connecting screw is disposed on the first U-shaped block, with one end of the first connecting screw passing through the first U-shaped block and the counterweight located on the side of the tension wheel, and slidably connected to the first U-shaped block and the counterweight located on the side of the tension wheel. The other end of the first connecting screw passes through the first U-shaped block, the connecting cantilever, and the counterweight located on the side of the connecting cantilever, and slidably connected to the first U-shaped block, the connecting cantilever, and the counterweight located on the side of the connecting cantilever. The pair of first locking nuts are respectively disposed at both ends of the first connecting screw and threadedly connected to the first connecting screw.

[0009] Preferably, a first locking washer is provided between a pair of first locking nuts and a pair of counterweights. The pair of first locking washers are respectively sleeved on both ends of the first connecting screw and are slidably connected to the first connecting screw. One side of one of the first locking washers contacts the counterweight located on the side of the tension wheel and the other side contacts one side of one of the first locking nuts. The other first locking washer contacts one side of the counterweight located on the side of the connecting cantilever and the other side contacts one side of the other first locking nut.

[0010] Preferably, the connecting structure further includes a second connecting member, which is disposed between a pair of counterweights and located at the lower end of the pair of counterweights. The lower end of the connecting cantilever is provided with an extension arm, which is fixedly connected to the connecting cantilever. The second connecting member includes a second connecting screw, a second U-shaped block, and a pair of second locking nuts. The second U-shaped block is disposed between the pair of counterweights, with one side of the second U-shaped block contacting the counterweight located on the side of the tension wheel and the other side contacting the side of the extension arm. The second connecting screw is disposed on the second U-shaped block, with one end of the second connecting screw passing through the second U-shaped block and the counterweight located on the side of the tension wheel, and slidably connected to the second U-shaped block and the counterweight located on the side of the tension wheel. The other end of the second connecting screw passes through the second U-shaped block, the extension arm, and the counterweight located on the side of the connecting cantilever, and slidably connected to the second U-shaped block, the extension arm, and the counterweight located on the side of the connecting cantilever. A pair of second locking nuts are respectively disposed at both ends of the second connecting screw and threadedly connected to the second connecting screw.

[0011] Preferably, a second locking washer is provided between a pair of second locking nuts and a pair of counterweights. The pair of second locking washers are respectively sleeved on both ends of the second connecting screw and are slidably connected to the second connecting screw. One side of one second locking washer contacts the counterweight located on the side of the tension wheel and the other side contacts one side of one of the second locking nuts. The other second locking washer contacts the counterweight located on the side of the connecting cantilever and the other side contacts one side of the other second locking nut.

[0012] Preferably, the tensioning wheel and the connecting cantilever are rotatably connected by a rotating structure. Each pair of counterweights has an installation window that mates with the rotating structure. The rotating structure includes a fixed wheel axle and a fixed nut. One end of the fixed wheel axle passes through the tensioning wheel and the connecting cantilever. The fixed wheel axle is rotatably connected to the tensioning wheel and slidably connected to the connecting cantilever. The fixed nut is located at the end of the fixed wheel axle and is threadedly connected to it. A fixed washer is provided between the fixed nut and the connecting cantilever. The fixed washer is fitted on the fixed wheel axle and slidably connected to it. One side of the fixed washer contacts one side of the connecting cantilever, and the other side contacts the fixed nut.

[0013] Preferably, a U-shaped mounting plate and a T-shaped guide plate are sequentially provided between the tensioning wheel and the connecting cantilever. The T-shaped guide plate is located on the side closer to the tensioning wheel, with one end of the T-shaped guide plate sleeved on the fixed wheel axle. The T-shaped guide plate has a pair of U-shaped grooves that mate with both sides of the tensioning wheel. A partition sleeve is provided between the T-shaped guide plate and the tensioning wheel, and the partition sleeve is sleeved on the fixed wheel axle and threadedly connected to the fixed wheel axle. One side of the tensioning wheel is rotatably engaged with the partition sleeve. The U-shaped mounting plate is sleeved on the fixed wheel axle, and both ends are respectively engaged with both sides of the tensioning wheel. A partition washer is provided between the U-shaped mounting plate and the connecting cantilever, and the partition washer is sleeved on the fixed wheel axle and slidably connected to the fixed wheel axle.

[0014] Preferably, the fixed mounting plate is provided with a fixed rod, one end of which is fixedly connected to the lower end of the fixed mounting plate. One end of the connecting cantilever is sleeved on the fixed rod and rotatably connected to it. The fixed rod is provided with a rotating sleeve, which is sleeved on the fixed rod and rotatably engaged with one side of the connecting cantilever. The other end of the fixed rod is provided with a pull pin to prevent the rotating sleeve from falling off. One end of the pull pin passes through the fixed rod and is detachably connected to it.

[0015] Preferably, the upper end of the mounting plate is provided with a pair of fixing structures, which are respectively disposed on both sides of the mounting plate. The fixing structures include a locking block, a mounting screw, and a mounting nut. The mounting plate is provided with a sliding groove that cooperates with the mounting screw. The locking block is disposed on one side of the mounting plate. One end of the mounting screw passes through the locking block and through the sliding groove, and the mounting screw is slidably connected to the locking block and the sliding groove. The mounting nut is disposed on the other side of the mounting plate and is threadedly connected to the mounting screw. A mounting washer is provided between the mounting nut and the mounting plate. The mounting washer is sleeved on the mounting screw and is slidably connected to the mounting screw. One side of the mounting washer contacts the mounting plate, and the other side contacts the mounting nut.

[0016] Preferably, the tensioning assembly is provided with a triggering structure, which includes a triggering plate, a fixing plate, and a non-automatic reset limit switch. The triggering plate is mounted on the connecting cantilever and is detachably connected to the connecting cantilever by bolts. The triggering plate is located on one side of the fixed mounting plate, and one end of the fixing plate is detachably connected to the fixed mounting plate by bolts. The non-automatic reset limit switch is mounted on the fixing plate and is located below the triggering plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This utility model solves the problem that the counterweights in the current counterweight-side tensioning device need to be set separately on one side of the tensioning assembly, resulting in a large size of the counterweight-side tensioning device. This is achieved by setting a pair of counterweights on the tensioning assembly, with one counterweight on the side of the connecting cantilever and the other on the side of the tensioning wheel, and detachably connecting them to the connecting cantilever through a connecting structure. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the installation structure of a counterweight-side tensioning device as described in an embodiment of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of a counterweight tensioning device described in an embodiment of this utility model. Figure 1 ;

[0022] Figure 3This is a schematic diagram of the structure of a counterweight tensioning device described in an embodiment of this utility model. Figure 2 ;

[0023] Figure 4 This is a partial structural schematic diagram of a counterweight-side tensioning device described in an embodiment of this utility model;

[0024] Figure 5 This is a schematic diagram of a partial explosion structure of a counterweight tensioning device described in an embodiment of this utility model. Figure 1 ;

[0025] Figure 6 This is a schematic diagram of a partial explosion structure of a counterweight tensioning device described in an embodiment of this utility model. Figure 2 ;

[0026] Figure 7 This is a schematic diagram of a partial explosion structure of a counterweight tensioning device described in an embodiment of this utility model. Figure 3 ;

[0027] Explanation of reference numerals in the attached figures:

[0028] 10-Tensioning assembly, 100-Fixed mounting plate, 101-Connecting cantilever, 102-Tensioning wheel, 103-Extension arm, 104-Rotating structure, 105-Mounting window, 106-Fixed axle, 107-Fixed nut, 108-Fixed washer, 109-U-shaped mounting plate, 110-T-shaped guide plate, 111-U-shaped groove, 112-Separator sleeve, 113-Separator washer, 114-Fixed insert rod, 115-Rotating sleeve, 116-Pull-out pin, 117-Fixed structure, 118-Clamping block, 119-Mounting screw, 120-Mounting screw 121-Sliding groove, 122-Mounting washer, 123-Trigger structure, 124-Trigger plate, 125-Fixing plate, 126-Non-automatic reset limit switch, 20-Counterweight assembly, 200-Counterweight, 201-Connecting structure, 202-First connecting piece, 203-First connecting screw, 204-First U-block, 205-First locking nut, 206-First locking washer, 207-Second connecting piece, 208-Second connecting screw, 209-Second U-block, 210-Second locking nut, 211-Second locking washer. Detailed Implementation

[0029] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0030] In the description of the embodiments of this utility model, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model 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 the embodiments of this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In this embodiment of the 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, an electrical connection, or a communication 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 embodiment of the invention according to the specific circumstances.

[0033] In this embodiment of the invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being 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 includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0035] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0036] Example:

[0037] like Figures 1 to 7 As shown, this embodiment discloses a counterweight tensioning device, including a tensioning assembly 10 and a counterweight assembly 20. The tensioning assembly 10 includes a fixed mounting plate 100, a connecting cantilever 101, and a tensioning wheel 102. One end of the connecting cantilever 101 is rotatably connected to the fixed mounting plate 100, and the tensioning wheel 102 is disposed at the other end of the connecting cantilever 101 and rotatably connected to one side of the connecting cantilever 101. The counterweight assembly 20 includes a pair of counterweights 200, one of which is disposed on one side of the connecting cantilever 101, and the other is disposed on one side of the tensioning wheel 102. The pair of counterweights 200 are detachably connected to the connecting cantilever 101 through a connecting structure 201.

[0038] This invention addresses the problem of large device size in current counterweight-side tensioning devices where the counterweight 200 is separately mounted on the tensioning assembly 10, one on the side of the connecting cantilever 101 and the other on the side of the tensioning wheel 102, and is detachably connected to the connecting cantilever 101 via a connecting structure 201. This design solves the problem of difficult or even impossible installation of the tensioning device in situations with limited shaft dimensions or pit clearance, effectively reducing the device size and improving its applicability in special installation environments.

[0039] As a further preferred embodiment, the counterweight 200 includes at least one metal plate. The counterweight 200, comprising at least one metal plate, has a simple and easy-to-implement structure, allowing the number of metal plates to be adjusted according to actual needs to meet different counterweight requirements, thus ensuring the stability and reliability of the tensioning device.

[0040] As a further preferred embodiment, the counterweight 200 located on one side of the tensioner 102 is clearance-fitted with the tensioner 102. The clearance fit between the counterweight 200 located on one side of the tensioner 102 and the tensioner 102 facilitates the rotation of the tensioner 102.

[0041] To facilitate the installation between the pair of counterweights 200 and the connecting cantilever 101, this embodiment is an improvement upon the above embodiment. The difference lies in that the connecting structure 201 includes a pair of first connecting members 202, which are disposed between the pair of counterweights 200 and located on opposite sides of each counterweight 200. Each first connecting member 202 includes a first connecting screw 203, a first U-shaped block 204, and a pair of first locking nuts 205. The first U-shaped block 204 is disposed between the pair of counterweights 200, with one side contacting the counterweight 200 located on one side of the tension wheel 102, and the other side contacting one side of the connecting cantilever 101. The first connecting screw 203 is disposed on the first U-shaped block 204. One end of the first connecting screw 203 passes through the first U-shaped block 204 and the counterweight 200 located on one side of the tensioning wheel 102, and is slidably connected to the first U-shaped block 204 and the counterweight 200 located on one side of the tensioning wheel 102. The other end of the first connecting screw 203 passes through the first U-shaped block 204, the connecting cantilever 101 and the counterweight 200 located on one side of the connecting cantilever 101, and is slidably connected to the first U-shaped block 204, the connecting cantilever 101 and the counterweight 200 located on one side of the connecting cantilever 101. A pair of first locking nuts 205 are respectively disposed at both ends of the first connecting screw 203 and are threadedly connected to the first connecting screw 203.

[0042] A first locking washer 206 is provided between a pair of first locking nuts 205 and a pair of counterweights 200. The pair of first locking washers 206 are respectively sleeved on both ends of the first connecting screw 203 and are slidably connected to the first connecting screw 203. One side of one of the first locking washers 206 contacts the counterweight 200 located on the side of the tension wheel 102, and the other side contacts one side of one of the first locking nuts 205. One side of the other first locking washer 206 contacts the counterweight 200 located on the side of the connecting cantilever 101, and the other side contacts one side of the other first locking nut 205.

[0043] The first U-shaped block 204 allows for better contact and engagement between the counterweight 200 located on one side of the tensioning wheel 102 and the connecting cantilever 101, while also providing space between the pair of counterweights 200 for installing the tensioning wheel 102. The first connecting screw 203 passes through all components and is secured by the first locking nut 205, achieving a detachable connection between the pair of counterweights 200 and the connecting cantilever 101, facilitating installation and disassembly while ensuring the connection's strength and stability. The first locking washer 206 increases the friction between the first locking nut 205 and the counterweight 200, preventing the first locking nut 205 from loosening, improving connection reliability, and extending the device's service life.

[0044] To further improve the stability of the connection between the pair of counterweights 200 and the connecting cantilever 101, this embodiment is an improvement on the above embodiment. The difference is that the connecting structure 201 further includes a second connecting member 207. The second connecting member 207 is disposed between the pair of counterweights 200 and located at the lower end of the pair of counterweights 200. The lower end of the connecting cantilever 101 is provided with an extension arm 103, which is fixedly connected to the connecting cantilever 101. The second connecting member 207 includes a second connecting screw 208, a second U-shaped block 209, and a pair of second locking nuts 210. The second U-shaped block 209 is disposed between the pair of counterweights 200, with one side of the second U-shaped block 209 connected to the counterweight 200 located on the side of the tension wheel 102. One end of the second connecting screw 208 is connected to the second U-shaped block 209, and the other end is connected to the side of the extension arm 103. The second connecting screw 208 is mounted on the second U-shaped block 209. One end of the second connecting screw 208 passes through the second U-shaped block 209 and the counterweight 200 located on the side of the tension wheel 102, and is slidably connected to the second U-shaped block 209 and the counterweight 200 located on the side of the tension wheel 102. The other end of the second connecting screw 208 passes through the second U-shaped block 209, the extension arm 103 and the counterweight 200 located on the side of the connecting cantilever 101, and is slidably connected to the second U-shaped block 209, the extension arm 103 and the counterweight 200 located on the side of the connecting cantilever 101. A pair of second locking nuts 210 are respectively mounted on both ends of the second connecting screw 208 and are threadedly connected to the second connecting screw 208.

[0045] A second locking washer 211 is provided between a pair of second locking nuts 210 and a pair of counterweights 200. The pair of second locking washers 211 are respectively sleeved on both ends of the second connecting screw 208 and slidably connected to the second connecting screw 208. One side of one second locking washer 211 contacts the counterweight 200 located on the side of the tension wheel 102, and the other side contacts one side of one of the second locking nuts 210. One side of the other second locking washer 211 contacts the counterweight 200 located on the side of the connecting cantilever 101, and the other side contacts one side of the other second locking nut 210.

[0046] The extension arm 103 at the lower end of the connecting cantilever 101 mates with the second connecting member 207. One side of the second U-shaped block 209 contacts the counterweight 200 located on one side of the tension wheel 102, and the other side contacts the extension arm 103. The second connecting screw 208 passes through all components and is fixed by the second locking nut 210, further enhancing the connection stability between the counterweight 200 and the connecting cantilever 101. The second locking washer 211 functions similarly to the first locking washer 206. The second locking washer 211 increases the friction between the second locking nut 210 and the counterweight 200, preventing the second locking nut 210 from loosening, ensuring the reliability of the connection of the second connecting member 207, and improving the stability of the device during operation.

[0047] To facilitate the installation of the tensioner 102, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that the tensioner 102 and the connecting cantilever 101 are rotatably connected by a rotating structure 104. Each pair of counterweights 200 is provided with an installation window 105 that cooperates with the rotating structure 104. The rotating structure 104 includes a fixed wheel shaft 106 and a fixed nut 107. One end of the fixed wheel shaft 106 passes through the tensioner 102 and the connecting cantilever 101. The fixed wheel shaft 106 is rotatably connected to the tensioner 102 and slidably connected to the connecting cantilever 101. The fixed nut 107 is located at the end of the fixed wheel shaft 106 and is threadedly connected to the fixed wheel shaft 106. A fixed washer 108 is provided between the fixed nut 107 and the connecting cantilever 101. The fixed washer 108 is sleeved on the fixed wheel shaft 106 and slidably connected to the fixed wheel shaft 106. One side of the fixed washer 108 contacts one side of the connecting cantilever 101, and the other side contacts the fixed nut 107.

[0048] A fixed wheel shaft 106 and a fixed nut 107 are used, and the fixed nut 107 and the fixed wheel shaft 106 are connected by threads, which facilitates the installation of the tensioning wheel 102. At the same time, the fixed washer 108 is used to prevent the fixed nut 107 from loosening, ensuring the reliability of the connection of the fixed wheel shaft 106, thereby improving the stability of the device during operation.

[0049] To prevent the steel cable in the elevator speed limiting mechanism from detaching from the tensioner 102, and to facilitate the movement of the steel cable, this embodiment is an improvement on the above embodiment. The difference lies in that a U-shaped mounting plate 109 and a T-shaped guide plate 110 are sequentially provided between the tensioner 102 and the connecting cantilever 101. The T-shaped guide plate 110 is located on the side closest to the tensioner 102, with one end sleeved on the fixed axle 106. The T-shaped guide plate 110 has a pair of U-shaped grooves 111 that mate with both sides of the tensioner 102. A partition sleeve 112 is provided between the T-shaped guide plate 110 and the tensioning wheel 102. The partition sleeve 112 is fitted on the fixed wheel shaft 106 and threadedly connected to the fixed wheel shaft 106. One side of the tensioning wheel 102 is rotatably engaged with the partition sleeve 112. The U-shaped mounting plate 109 is fitted on the fixed wheel shaft 106, and both ends are respectively engaged with the two sides of the tensioning wheel 102. A partition washer 113 is provided between the U-shaped mounting plate 109 and the connecting cantilever 101. The partition washer 113 is fitted on the fixed wheel shaft 106 and slidably connected to the fixed wheel shaft 106.

[0050] The U-shaped mounting plate 109 prevents the steel rope from detaching from the tensioner 102 after it loosens. The U-shaped groove 111 on the T-shaped guide plate 110 facilitates the passage of the steel rope and also provides some guidance. The separator sleeve 112 facilitates the rotatable connection between the tensioner 102 and the fixed wheel shaft 106. By adjusting the position of the separator sleeve 112 on the fixed wheel shaft 106, the rotational installation of the tensioner 102 can be easily achieved. Furthermore, the separator sleeve 112 and the separator washer 113 together facilitate the fixed installation of the U-shaped mounting plate 109 and the T-shaped guide plate 110 on the fixed wheel shaft 106. When the fixing nut 107 on the fixed wheel shaft 106 is tightened, the U-shaped mounting plate 109 and the T-shaped guide plate 110 are securely installed on the fixed wheel shaft 106.

[0051] To facilitate the rotational connection between the cantilever 101 and the fixed mounting plate 100, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that the fixed mounting plate 100 is provided with a fixed insertion rod 114. One end of the fixed insertion rod 114 is fixedly connected to the lower end of the fixed mounting plate 100. One end of the connecting cantilever 101 is sleeved on the fixed insertion rod 114 and is rotatably connected to the fixed insertion rod 114. The fixed insertion rod 114 is provided with a rotating sleeve 115. The rotating sleeve 115 is sleeved on the fixed insertion rod 114 and is rotatably engaged with one side of the connecting cantilever 101. The other end of the fixed insertion rod 114 is provided with a plug-in pin 116 to prevent the rotating sleeve 115 from falling off. One end of the plug-in pin 116 passes through the fixed insertion rod 114 and is detachably connected to the fixed insertion rod 114.

[0052] One end of the fixed insertion rod 114 is fixedly connected to the lower end of the fixed mounting plate 100. At the same time, one end of the connecting cantilever 101 is sleeved on the fixed insertion rod 114 and limited by the rotating sleeve 115 and the insertion pin 116. The rotating sleeve 115 is used to prevent the connecting cantilever 101 from falling off, and the insertion pin 116 is used to prevent the rotating sleeve 115 from falling off. This ensures that the connecting cantilever 101 and the rotating sleeve 115 will not detach from the fixed insertion rod 114 during rotation, thus ensuring the normal operation of the device.

[0053] To facilitate fixing the mounting plate 100 to other structures, this embodiment is an improvement upon the above embodiment. The difference lies in that the mounting plate 100 has a pair of fixing structures 117 at its upper end, respectively disposed on both sides of the mounting plate 100. Each fixing structure 117 includes a locking block 118, a mounting screw 119, and a mounting nut 120. The mounting plate 100 has a sliding groove 121 that cooperates with the mounting screw 119. The locking block 118 is disposed on one side of the mounting plate 100. One end of the mounting screw 119 passes through the locking block 118 and through the sliding groove 121. The mounting screw 119 is slidably connected to the locking block 118 and the sliding groove 121. The mounting nut 120 is located on the other side of the fixed mounting plate 100 and is threadedly connected to the mounting screw 119. A mounting washer 122 is provided between the mounting nut 120 and the fixed mounting plate 100. The mounting washer 122 is sleeved on the mounting screw 119 and is slidably connected to the mounting screw 119. One side of the mounting washer 122 contacts the fixed mounting plate 100, and the other side contacts the mounting nut 120.

[0054] The mounting screw 119 passes through the locking block 118 and the sliding groove 121 on the fixed mounting plate 100 and is fixed by the mounting nut 120. A mounting washer 122 is provided between the mounting nut 120 and the fixed mounting plate 100. This structure facilitates the fixing of the fixed mounting plate 100 to other structures. The sliding groove 121 allows the mounting screw 119 to be adjusted within a certain range, increasing the flexibility of installation. The mounting washer 122 increases the friction between the mounting nut 120 and the fixed mounting plate 100, improving the reliability of the fixation.

[0055] To facilitate the realization of the basic function of the counterweight side tensioning device described in this utility model, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that the tensioning assembly 10 is provided with a trigger structure 123. The trigger structure 123 includes a trigger plate 124, a fixing plate 125, and a non-automatic reset limit switch 126. The trigger plate 124 is disposed on the connecting cantilever 101 and is detachably connected to the connecting cantilever 101 by bolts. The trigger plate 124 is located on one side of the fixed mounting plate 100. One end of the fixing plate 125 is detachably connected to the fixed mounting plate 100 by bolts. The non-automatic reset limit switch 126 is disposed on the fixing plate 125 and is located below the trigger plate 124.

[0056] When the steel cable of the elevator speed limiting mechanism becomes loose, the connecting cantilever 101 rotates downward under the action of a pair of counterweights 200, which in turn triggers the trigger plate 124 to trigger the non-automatic reset limit switch 126. Connecting the non-automatic reset limit switch 126 to the elevator system can trigger an emergency stop of the elevator, ensuring the safety of elevator operation.

[0057] The non-automatic reset limit switch 126 is a non-automatic reset limit switch 126 that can achieve the function of this utility model in the prior art. After the non-automatic reset limit switch 126 is triggered, it requires manual reset, which facilitates maintenance after a problem occurs.

[0058] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0059] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A counterweight side tensioning device, characterized in that The assembly includes a tensioning component (10) and a counterweight component (20). The tensioning component (10) includes a fixed mounting plate (100), a connecting cantilever (101), and a tensioning wheel (102). One end of the connecting cantilever (101) is rotatably connected to the fixed mounting plate (100), and the tensioning wheel (102) is located at the other end of the connecting cantilever (101) and is rotatably connected to one side of the connecting cantilever (101). The counterweight component (20) includes a pair of counterweights (200), one of which is located on one side of the connecting cantilever (101), and the other is located on one side of the tensioning wheel (102). The pair of counterweights (200) are detachably connected to the connecting cantilever (101) through a connecting structure (201).

2. A weight side tensioning device according to claim 1, wherein The connecting structure (201) includes a pair of first connecting members (202), which are disposed between a pair of counterweights (200) and located on both sides of the pair of counterweights (200). Each first connecting member (202) includes a first connecting screw (203), a first U-shaped block (204), and a pair of first locking nuts (205). The first U-shaped block (204) is disposed between the pair of counterweights (200), with one side of the first U-shaped block (204) contacting the counterweight (200) located on the side of the tension wheel (102) and the other side contacting the side of the connecting cantilever (101). The first connecting screw (203) is disposed on the first U-shaped block (204). One end of the first connecting screw (203) passes through the first U-shaped block (204) and the counterweight (200) located on one side of the tensioning wheel (102), and is slidably connected to the first U-shaped block (204) and the counterweight (200) located on one side of the tensioning wheel (102). The other end of the first connecting screw (203) passes through the first U-shaped block (204), the connecting cantilever (101) and the counterweight (200) located on one side of the connecting cantilever (101), and is slidably connected to the first U-shaped block (204), the connecting cantilever (101) and the counterweight (200) located on one side of the connecting cantilever (101). A pair of first locking nuts (205) are respectively provided at both ends of the first connecting screw (203) and are threadedly connected to the first connecting screw (203).

3. A weight side tensioning device according to claim 2, wherein A first locking washer (206) is provided between a pair of first locking nuts (205) and a pair of counterweights (200). The pair of first locking washers (206) are respectively sleeved on both ends of the first connecting screw (203) and slidably connected to the first connecting screw (203). One side of one of the first locking washers (206) contacts the counterweight (200) located on the side of the tension wheel (102), and the other side contacts one side of one of the first locking nuts (205). One side of the other first locking washer (206) contacts the counterweight (200) located on the side of the connecting cantilever (101), and the other side contacts one side of the other first locking nut (205).

4. A weight side tensioning device according to claim 3, wherein The connecting structure (201) also includes a second connecting member (207), which is disposed between a pair of counterweights (200) and located at the lower end of the pair of counterweights (200). The lower end of the connecting cantilever (101) is provided with an extension arm (103), which is fixedly connected to the connecting cantilever (101). The second connecting member (207) includes a second connecting screw (208), a second U-shaped block (209), and a pair of second locking nuts (210). The second U-shaped block (209) is disposed between a pair of counterweights (200), with one side of the second U-shaped block (209) contacting the counterweight (200) located on the side of the tension wheel (102) and the other side contacting the side of the extension arm (103). The second connecting screw (208) is disposed between the pair of counterweights (200). On the second U-shaped block (209), one end of the second connecting screw (208) passes through the second U-shaped block (209) and the counterweight (200) located on the side of the tension wheel (102), and is slidably connected to the second U-shaped block (209) and the counterweight (200) located on the side of the tension wheel (102). The other end of the second connecting screw (208) passes through the second U-shaped block (209), the extension arm (103) and the counterweight (200) located on the side of the connecting cantilever (101), and is slidably connected to the second U-shaped block (209), the extension arm (103) and the counterweight (200) located on the side of the connecting cantilever (101). A pair of second locking nuts (210) are respectively provided at both ends of the second connecting screw (208) and are threadedly connected to the second connecting screw (208).

5. A weight side tensioning device according to claim 4, wherein A second locking washer (211) is provided between a pair of second locking nuts (210) and a pair of counterweights (200). The pair of second locking washers (211) are respectively sleeved on both ends of the second connecting screw (208) and are slidably connected to the second connecting screw (208). One side of one of the second locking washers (211) is in contact with the counterweight (200) located on the side of the tension wheel (102), and the other side is in contact with one side of one of the second locking nuts (210). One side of the other second locking washer (211) is in contact with the counterweight (200) located on the side of the connecting cantilever (101), and the other side is in contact with one side of the other second locking nut (210).

6. A weight side tensioning device according to claim 1 or 5, characterized in that The tensioning wheel (102) and the connecting cantilever (101) are rotatably connected via a rotating structure (104). Each pair of counterweights (200) has an installation window (105) that mates with the rotating structure (104). The rotating structure (104) includes a fixed wheel axle (106) and a fixed nut (107). One end of the fixed wheel axle (106) passes through the tensioning wheel (102) and the connecting cantilever (101). The fixed wheel axle (106) is rotatably connected to the tensioning wheel (102) and the connecting cantilever (101). The arm (101) is slidably connected, and the fixing nut (107) is set at the end of the fixing wheel shaft (106) and threadedly connected to the fixing wheel shaft (106). A fixing washer (108) is provided between the fixing nut (107) and the connecting cantilever (101). The fixing washer (108) is sleeved on the fixing wheel shaft (106) and slidably connected to the fixing wheel shaft (106). One side of the fixing washer (108) contacts one side of the connecting cantilever (101), and the other side contacts the fixing nut (107).

7. A weight side tensioning device according to claim 6, wherein A U-shaped mounting plate (109) and a T-shaped guide plate (110) are sequentially provided between the tensioning wheel (102) and the connecting cantilever (101). The T-shaped guide plate (110) is located on the side closer to the tensioning wheel (102). One end of the T-shaped guide plate (110) is sleeved on the fixed wheel axle (106). The T-shaped guide plate (110) is provided with a pair of U-shaped grooves (111) that cooperate with the two sides of the tensioning wheel (102). A partition sleeve (112) is provided between the T-shaped guide plate (110) and the tensioning wheel (102). 12) Sleeve on the fixed wheel shaft (106) and threadedly connected to the fixed wheel shaft (106), one side of the tensioning wheel (102) is rotatably engaged with the partition sleeve (112), the U-shaped mounting plate (109) is sleeved on the fixed wheel shaft (106) and both ends are respectively engaged with the two sides of the tensioning wheel (102), a partition washer (113) is provided between the U-shaped mounting plate (109) and the connecting cantilever (101), the partition washer (113) is sleeved on the fixed wheel shaft (106) and slidably connected with the fixed wheel shaft (106).

8. A counterweight-side tensioning device according to claim 7, characterized in that, A fixed mounting plate (100) is provided with a fixed insertion rod (114). One end of the fixed insertion rod (114) is fixedly connected to the lower end of the fixed mounting plate (100). One end of the connecting cantilever (101) is sleeved on the fixed insertion rod (114) and rotatably connected to the fixed insertion rod (114). A rotating sleeve (115) is provided on the fixed insertion rod (114). The rotating sleeve (115) is sleeved on the fixed insertion rod (114) and rotatably engaged with one side of the connecting cantilever (101). The other end of the fixed insertion rod (114) is provided with a plug pin (116) to prevent the rotating sleeve (115) from falling off. One end of the plug pin (116) passes through the fixed insertion rod (114) and is detachably connected to the fixed insertion rod (114).

9. A counterweight-side tensioning device according to claim 8, characterized in that, The upper end of the fixed mounting plate (100) is provided with a pair of fixing structures (117), which are respectively arranged on both sides of the fixed mounting plate (100). The fixing structure (117) includes a locking block (118), a mounting screw (119), and a mounting nut (120). The fixed mounting plate (100) is provided with a sliding groove (121) that cooperates with the mounting screw (119). The locking block (118) is located on one side of the fixed mounting plate (100), and one end of the mounting screw (119) passes through the locking block (118) and through the sliding groove (121). The mounting screw (119) is slidably connected to the locking block (118) and the sliding groove (121). The mounting nut (120) is located on the other side of the fixed mounting plate (100) and is threadedly connected to the mounting screw (119). A mounting washer (122) is provided between the mounting nut (120) and the fixed mounting plate (100). The mounting washer (122) is sleeved on the mounting screw (119) and is slidably connected to the mounting screw (119). One side of the mounting washer (122) contacts the fixed mounting plate (100), and the other side contacts the mounting nut (120).

10. A counterweight-side tensioning device according to claim 9, characterized in that, The tensioning assembly (10) is provided with a trigger structure (123). The trigger structure (123) includes a trigger plate (124), a fixing plate (125), and a non-automatic reset limit switch (126). The trigger plate (124) is set on the connecting cantilever (101) and is detachably connected to the connecting cantilever (101) by bolts. The trigger plate (124) is located on one side of the fixed mounting plate (100). One end of the fixing plate (125) is detachably connected to the fixed mounting plate (100) by bolts. The non-automatic reset limit switch (126) is set on the fixing plate (125) and is located below the trigger plate (124).

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