Speed ​​governor and elevator

Abstract

The present invention provides a speed limiter and an elevator, wherein the speed limiter includes a mounting body, a sheave, a centrifugal hammer, a pawl, a spring assembly, and a braking device. The sheave is rotatably mounted on the mounting body; the centrifugal hammer is rotatably mounted on one side of the sheave; the pawl is mounted on the centrifugal hammer; the spring assembly is mounted on the sheave and connected to the centrifugal hammer; the braking device includes a ratchet and a braking assembly, both of which are rotatably mounted on the mounting body, the ratchet is located on one side of the pawl, and is transmission-connected to the braking assembly, so that the pawl can drive the braking assembly to move toward the side close to the sheave through the ratchet to crimp with the steel wire rope on the sheave. The present application prevents the centrifugal hammer and the pawl from extending into the inner wall of the sheave, which would otherwise cause the sheave to be larger in size, by correspondingly arranging the centrifugal hammer and the pawl on one side of the sheave. The centrifugal hammer and the pawl have simple structures and small sizes, making the structure between the sheave, the centrifugal hammer, and the pawl compact, thereby reducing the volume of the speed limiter.

Description

Technical Field

[0001] The present invention relates to the field of elevators, and in particular to a speed governor and an elevator. Background Art

[0002] The elevator speed governor is a critical safety component. If the elevator car exceeds speed for any reason and other safety devices are inoperative, the speed governor and safety clamp will work in conjunction to stop the elevator car. However, current speed governors are relatively large, occupying a large cross-sectional area in the elevator shaft when deployed, limiting the reduction of elevator shaft space. Summary of the Invention

[0003] Based on this, it is necessary to provide a speed governor and an elevator to address the problem that the current speed governor is large in size.

[0004] The technical solution is as follows:

[0005] In one aspect, a speed limiter is provided, comprising:

[0006] Install the body;

[0007] a rope pulley rotatably mounted on the mounting body;

[0008] a centrifugal hammer rotatably mounted on one side of the rope pulley;

[0009] A pawl, the pawl being mounted on the centrifugal hammer;

[0010] a spring assembly, the spring assembly being mounted on the rope pulley and connected to the centrifugal hammer; and

[0011] The braking device includes a ratchet and a brake assembly, both of which are rotatably mounted on the mounting body. The ratchet is located on one side of the pawl and is in transmission connection with the brake assembly, so that the pawl can drive the brake assembly to move toward the side close to the rope pulley through the ratchet to engage with the wire rope on the rope pulley. The technical solution is further described below:

[0012] In one embodiment, the centrifugal hammer includes a counterweight end and a connecting end. Along the axial direction of the pulley, the thickness of the counterweight end is greater than the thickness of the connecting end. The side of the connecting end away from the pulley is located between the pulley and the side of the counterweight end away from the pulley, and the pawl is installed on the side of the connecting end away from the pulley.

[0013] In one embodiment, there are two centrifugal hammers, which are arranged along the circumferential direction of the pulley. The speed limiter also includes a connecting rod, and both ends of the connecting rod are rotatably connected to the two connecting ends in a one-to-one correspondence.

[0014] In one embodiment, the rope pulley is further provided with a supporting balance portion, and the supporting balance portion is used to balance the weight of the centrifugal hammer, the pawl, the spring assembly and the connecting rod.

[0015] In one embodiment, the pawl is provided with a sharp corner portion, and the sharp corner portion is used to engage with the ratchet wheel.

[0016] In one embodiment, the speed limiter also includes a torsion spring, which is located between the centrifugal hammer and the pawl, and the two ends of the torsion spring are respectively connected to the centrifugal hammer and the pawl in a one-to-one manner. The spring assembly includes a speed regulating spring, a spring rod and a transmission shaft. A mounting portion is provided on the side of the pulley away from the centrifugal hammer, one end of the spring rod and the mounting portion move and cooperate along the axial direction of the spring rod, the speed regulating spring is sleeved on the outer side wall of the spring rod, the centrifugal hammer is provided with a transmission hole, the other end of the spring rod is connected to one end of the transmission shaft, the transmission shaft is passed through the transmission hole, and the other end of the transmission shaft contacts and cooperates with the pawl to drive the pawl to engage with the ratchet.

[0017] In one embodiment, the brake assembly includes a brake seat, a pull rod, a brake spring and a brake shoe; the brake seat is rotatably connected to the mounting body, the brake seat is provided with a through hole, one end of the pull rod is rotatably connected to the ratchet, the pull rod is passed through the through hole, and the other end of the pull rod is provided with a resistance portion, the brake spring is sleeved on the outer wall of the pull rod and is located between the resistance portion and the brake seat, the brake shoe is installed on the brake seat and is used to be crimped with the wire rope on the pulley.

[0018] In one embodiment, the brake seat includes an upper seat body, a lower seat body, a pin shaft and a fixed shaft, the upper seat body is fixedly connected to the lower seat body and inclined toward the side close to the rope pulley, the through hole is arranged on the upper seat body, and the lower seat body is provided with flanges on two opposite sides, and the flanges are provided with a first mounting hole and a second mounting hole at intervals, the fixed shaft passes through the two first mounting holes and is rotatably connected to the mounting body, the pin shaft is inserted into the two second mounting holes, the lower seat body is provided with a mounting groove, the brake shoe is passed through the mounting groove and fixedly connected to the pin shaft.

[0019] In one embodiment, the braking device further includes an adjusting assembly, which is mounted on the fixed shaft and is used to adjust an inclination angle of the brake shoe relative to the lower seat body.

[0020] On the other hand, an elevator is provided, comprising the speed governor.

[0021] In the speed governor and elevator of the above-described embodiment, when the speed governor is in normal operation, the sheave rotates at the rated speed, the initial pressing force provided by the spring assembly is greater than the centrifugal force of the centrifugal hammer, and the centrifugal hammer does not open, causing the pawl to be spaced apart from the ratchet and rotate with the sheave, and the speed governor does not operate. When the speed governor is in overspeed operation, the centrifugal force of the centrifugal hammer is greater than the initial pressing force provided by the spring assembly, causing the centrifugal hammer to open, causing the centrifugal hammer to drive the pawl toward the ratchet. When the pawl engages the ratchet, the force of the sheave's rotation is transmitted to the ratchet through the centrifugal hammer and pawl, driving the ratchet to rotate. The ratchet, in turn, causes the brake assembly to rotate downward, thereby pressing the brake assembly onto the wire rope, pulling the safety clamp to stop the elevator, achieving the speed limiting effect. Compared with the current speed limiter, the present application arranges the centrifugal hammer and the pawl on one side of the rope pulley respectively, thereby preventing the centrifugal hammer and the pawl from extending into the inner wall of the rope pulley and causing the rope pulley to be too large. The centrifugal hammer and the pawl have a simple structure and a small size, so that the structure between the rope pulley, the centrifugal hammer and the pawl is compact, thereby reducing the volume of the speed limiter, thereby reducing the hoistway cross-sectional space occupied by the speed limiter when arranged in the elevator. The present application has a simple structure, reliable performance, and strong market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings that constitute a part of this application are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 FIG. 1 is a schematic structural diagram of a speed limiter according to an embodiment when operating at normal speed.

[0025] Figure 2 for Figure 1 Schematic diagram of the structure of the speed limiter when it is abnormally overspeeding.

[0026] Figure 3 for Figure 1 Exploded view of the speed limiter.

[0027] Figure 4 for Figure 1 Exploded view of the pulley, centrifugal hammer, pawl, connecting rod and spring assembly.

[0028] Figure 5 for Figure 4 Schematic diagram of the structure of the pawl.

[0029] Figure 6 for Figure 4 Exploded view of the spring assembly.

[0030] Figure 7 for Figure 1 Schematic diagram of the structure of the braking device.

[0031] Figure 8 for Figure 7 Schematic diagram of the structure of the middle brake seat.

[0032] Figure 9 for Figure 1 Schematic diagram of the structure of the installation body.

[0033] Description of reference numerals:

[0034] 10. Speed ​​governor; 100. Mounting body; 110. First positioning sleeve; 120. Main shaft; 130. Second positioning sleeve; 140. Base; 150. Fixing plate; 210. Pulley; 211. Support balance portion; 212. Mounting portion; 220. Centrifugal hammer; 221. Counterweight end; 222. Connecting end; 223. Transmission hole; 230. Ratchet; 231. Sharp corner; 240. Spring assembly; 241. Speed ​​regulating spring; 242. Spring rod; 243. Transmission shaft; 244. First adjusting nut; 245. Washer; 250, connecting rod; 260, torsion spring; 300, braking device; 310, ratchet; 320, braking assembly; 321, brake seat; 3211, through hole; 3212, upper seat body; 3213, lower seat body; 3214, pin; 3215, fixed shaft; 3216, flange; 3217, mounting groove; 322, pull rod; 3221, interference portion; 323, brake spring; 324, brake shoe; 330, adjusting assembly; 331, adjusting bolt; 332, second adjusting nut; 400, positioning device. DETAILED DESCRIPTION

[0035] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0036] like Figure 1 、 Figure 2 and Figure 3As shown, in one embodiment, a speed governor 10 is provided, comprising a mounting body 100, a sheave 210, a centrifugal hammer 220, a pawl 230, a spring assembly 240, and a braking device 300. The sheave 210 is rotatably mounted on the mounting body 100; the centrifugal hammer 220 is rotatably mounted on one side of the sheave 210; the pawl 230 is mounted on the centrifugal hammer 220; the spring assembly 240 is mounted on the sheave 210 and connected to the centrifugal hammer 220; and the braking device 300 comprises a ratchet 310 and a braking assembly 320, both of which are rotatably mounted on the mounting body 100. The ratchet 310 is located on one side of the pawl 230 and is in transmission connection with the braking assembly 320, so that the pawl 230 can drive the braking assembly 320 to move toward the side close to the sheave 210 through the ratchet 310, so as to be pressed into engagement with the wire rope on the sheave 210.

[0037] In the speed governor 10 of the above embodiment, when the speed governor 10 is in normal operation, the rope pulley 210 rotates at the rated speed, the initial pressing force provided by the spring assembly 240 is greater than the centrifugal force of the centrifugal hammer 220, and the centrifugal hammer 220 does not open, so that the pawl 230 is spaced apart from the ratchet 310 and rotates along with the rope pulley 210, and the speed governor 10 does not operate. When the speed governor 10 is in overspeed operation, the centrifugal force of the centrifugal hammer 220 is greater than the initial pressing force provided by the spring assembly 240, and the centrifugal hammer 220 opens, so that the centrifugal hammer 220 drives the pawl 230 to move in a direction close to the ratchet 310. When the pawl 230 is engaged with the ratchet 310 (as shown in FIG. 2 ), the speed governor 10 does not operate. Figure 2 As shown in FIG, the force of the rotation of the rope sheave 210 is transmitted to the ratchet 310 through the centrifugal hammer 220 and the pawl 230, thereby driving the ratchet 310 to rotate, thereby causing the ratchet 310 to drive the brake assembly 320 to rotate and press downward, thereby causing the brake assembly 320 to press on the wire rope to pull the safety clamp to stop the elevator, thereby achieving the speed limiting effect. Compared with the existing braking device 300, the present application arranges the centrifugal hammer 220 and the pawl 230 on one side of the rope sheave 210, thereby preventing the centrifugal hammer 220 and the pawl 230 from extending into the inner wall of the rope sheave 210 and causing the rope sheave 210 to be too large. In addition, the centrifugal hammer 220 and the pawl 230 have a simple structure and a small size, making the structure between the rope sheave 210, the centrifugal hammer 220 and the pawl 230 compact, thereby reducing the volume of the speed governor 10, thereby reducing the hoistway cross-sectional space occupied by the speed governor 10 when arranged in the elevator. The present application has a simple structure, reliable performance, and strong market competitiveness.

[0038] like Figure 3 and Figure 4As shown, the centrifugal hammer 220 further includes a counterweight end 221 and a connecting end 222. Along the axial direction of the sheave 210, the thickness of the counterweight end 221 is greater than the thickness of the connecting end 222. The side of the connecting end 222 away from the sheave 210 is located between the sheave 210 and the side of the counterweight end 221 away from the sheave 210. The pawl 230 is installed on the side of the connecting end 222 away from the sheave 210. In this way, the height of the pawl 230 protruding from the centrifugal hammer 220 is reduced, so that the volume of the speed governor 10 is further reduced.

[0039] In this embodiment, the centrifugal hammer 220 is an overall crescent-shaped plate. The side of the connecting end 222 closest to the sheave 210 and the side of the counterweight end 221 closest to the sheave 210 are located on the same plane. This significantly increases the weight of the counterweight end 221 compared to the connecting end 222, improving the stability of the centrifugal hammer 220.

[0040] like Figure 3 and Figure 4 As shown, optionally, there are two centrifugal hammers 220, and the two centrifugal hammers 220 are arranged along the circumferential direction of the rope sheave 210. The speed governor 10 also includes a connecting rod 250, and the two ends of the connecting rod 250 are rotatably connected to the two connecting ends 222 in a one-to-one correspondence. In this way, the two centrifugal hammers 220 are connected by the connecting rod 250, so that the two centrifugal hammers 220 can be opened or closed at the same time, ensuring that the centrifugal hammers 220 can drive the pawl 230 to engage with the ratchet 310, thereby improving the reliability of the speed governor 10. In addition, the connecting rod 250 can be embedded in the connecting end 222 of the centrifugal hammer 220, so that the volume of the speed governor 10 is further reduced. Specifically in this embodiment, the two centrifugal hammers 220 are arranged at intervals along the circumferential direction of the rope sheave 210, and the counterweight end 221 of the centrifugal hammer 220 is arranged corresponding to the connecting end 222 of the other centrifugal hammer 220. The volume of the speed governor 10 in this application can be 25% smaller than that of the current speed governor.

[0041] like Figure 3 and Figure 4 As shown, the sheave 210 optionally further includes a supporting balancing portion 211 for balancing the weight of the centrifugal weight 220, the pawl 230, the spring assembly 240, and the connecting rod 250. The sheave 210, the centrifugal weight 220, the pawl 230, the spring assembly 240, and the connecting rod 250 can be assembled to form an assembled wheel body. The supporting balancing portion 211 balances the weight of the assembled wheel body, ensuring that the center of gravity of the assembled wheel body falls precisely on the wheel center, thereby improving the operational stability and service life of the speed governor 10.

[0042] Specifically in this embodiment, the support balance portion 211 is configured as a wide wheel support portion, and the rope pulley 210 is further provided with at least one narrow wheel support portion, and the wide wheel support portion and each narrow wheel support portion are arranged along the circumferential direction of the rope pulley 210. In other embodiments, the rope pulley 210 is further provided with an inner ring protrusion, which is used to limit the position of the centrifugal hammer 220 to be tightened inward.

[0043] like Figure 4 and Figure 5 As shown, in one embodiment, the pawl 230 has a sharp corner portion 231, which is used to engage with the ratchet 310. In this way, the special meshing angle design between the pawl 230 and the ratchet 310 can effectively reduce the probability of tooth jumping when the pawl 230 and the ratchet 310 are engaged, thereby improving the operation accuracy of the speed governor 10.

[0044] Specifically in this embodiment, the pawl 230 includes a head, a pawl body and a pointed corner portion 231. The head is used to be rotatably connected to the connecting end 222. The head and the pointed corner portion 231 are respectively arranged on the two opposite outer wall sides of the pawl body, and the other two outer walls of the pawl body are respectively provided with a side straight surface and a side arc surface.

[0045] like Figure 4 and Figure 6As shown, optionally, the speed limiter 10 further includes a torsion spring 260, which is located between the centrifugal hammer 220 and the pawl 230, and the two ends of the torsion spring 260 are respectively connected to the centrifugal hammer 220 and the pawl 230, and the spring assembly 240 includes a speed regulating spring 241, a spring rod 242 and a transmission shaft 243. The side of the pulley 210 away from the centrifugal hammer 220 is provided with a mounting portion 212, one end of the spring rod 242 and the mounting portion 212 move along the axial direction of the spring rod 242, the speed regulating spring 241 is sleeved on the outer side wall of the spring rod 242, the centrifugal hammer 220 is provided with a transmission hole 223, the other end of the spring rod 242 is connected to one end of the transmission shaft 243, the transmission shaft 243 is passed through the transmission hole 223, and the other end of the transmission shaft 243 contacts and cooperates with the pawl 230 to drive the pawl 230 to engage with the ratchet 310. In this way, when the speed governor 10 is in normal operation, the rope pulley 210 rotates at the rated speed, the initial pressing force provided by the speed regulating spring 241 is greater than the centrifugal force of the centrifugal hammer 220, the centrifugal hammer 220 does not open, and the pawl 230 contacts the transmission shaft 243 under the action of the torsion spring 260, and rotates with the rope pulley 210, and the speed governor 10 does not operate. When the speed governor 10 is in the overspeed running state, the centrifugal force of the centrifugal hammer 220 is greater than the initial pressing force provided by the speed regulating spring 241, the centrifugal hammer 220 opens, and the transmission shaft 243 on the centrifugal hammer 220 presses down the pawl 230, so that the pawl 230 is closer and closer to the ratchet 310. When the pawl 230 contacts the ratchet 310, the force of the rotation of the rope sheave 210 is transmitted to the ratchet 310 through the pawl 230, driving the ratchet 310 to rotate. The ratchet 310 drives the brake assembly 320 to rotate and press down, so that the brake assembly is pressed onto the wire rope, thereby pulling the safety clamp to stop the elevator.

[0046] Specifically in the embodiment, the spring assembly 240 also includes a first adjusting nut 244 and a washer 245. The first adjusting nut 244 is installed on the spring rod 242. The first adjusting nut 244 is located between the speed regulating spring 241 and the transmission shaft 243. The first adjusting nut 244 is used to adjust the initial clamping force of the speed regulating spring 241. The washer 245 is installed on the transmission shaft 243 to limit the position of the transmission shaft 243 relative to the centrifugal hammer 220.

[0047] like Figure 3 、 Figure 7 and Figure 8As shown, in one embodiment, the brake assembly 320 includes a brake seat 321, a pull rod 322, a brake spring 323 and a brake shoe 324; the brake seat 321 is rotatably connected to the mounting body 100, the brake seat 321 is provided with a through hole 3211, one end of the pull rod 322 is rotatably connected to the ratchet 310, the pull rod 322 is passed through the through hole 3211, and the other end of the pull rod 322 is provided with a resistance portion 3221, the brake spring 323 is sleeved on the outer wall of the pull rod 322, and is located between the resistance portion 3221 and the brake seat 321, the brake shoe 324 is installed on the brake seat 321, and is used to be crimped with the wire rope on the pulley 210. In this way, when the speed governor 10 is in the overspeed running state, the centrifugal force of the centrifugal hammer 220 is greater than the initial pressing force provided by the speed regulating spring 241, the centrifugal hammer 220 opens, and the transmission shaft 243 on the centrifugal hammer 220 presses down the pawl 230, so that the pawl 230 gets closer and closer to the ratchet 310. When the pawl 230 contacts the ratchet 310, the force of the rotation of the sheave 210 is transmitted to the ratchet 310 through the centrifugal hammer 220 and the pawl 230, driving the ratchet 310 to rotate. The ratchet 310 drives the brake seat 321 to rotate and press down through the pull rod 322 and the brake spring 323, so that the brake shoe 324 is pressed down to be pressed into engagement with the wire rope on the sheave 210, thereby pulling the safety clamp to stop the elevator.

[0048] like Figure 7 and Figure 8 As shown, the brake seat 321 further includes an upper seat body 3212, a lower seat body 3213, a pin 3214, and a fixed shaft 3215. The upper seat body 3212 is fixedly connected to the lower seat body 3213 and is inclined toward the side closer to the rope pulley 210. A through hole 3211 is provided in the upper seat body 3212. The lower seat body 3213 has flanges 3216 on opposite sides. The flanges 3216 have first and second mounting holes spaced apart. The fixed shaft 3215 passes through the two first mounting holes and is rotatably connected to the mounting body 100. The pin 3214 is inserted into the two second mounting holes. The lower seat body 3213 has a mounting slot 3217. The brake shoe 324 is inserted into the mounting slot 3217 and fixedly connected to the pin 3214. As such, the brake seat 321 has a regular structure and can be formed by directly bending a sheet material, making it simple to manufacture.

[0049] Specifically in this embodiment, the resisting portion 3221 is configured as a resisting seat, a spring mounting seat is provided on the upper seat body 3212 , and the brake spring 323 is installed between the spring mounting seat and the resisting seat.

[0050] like Figure 7 and Figure 8As shown, the brake device 300 optionally further includes an adjustment assembly 330 mounted on the fixed shaft 3215. The adjustment assembly 330 is used to adjust the inclination angle of the brake shoe 324 relative to the lower seat 3213. In this way, the adjustment assembly 330 can adjust the inclination angle of the brake shoe 324 relative to the brake seat 321, so that the brake shoe 324 can be in surface contact with the wire rope, ensuring that the brake shoe 324 can press against the wire rope to pull the safety clamp to stop the elevator, thereby improving the reliability of the speed governor 10.

[0051] Specifically, in this embodiment, the adjustment assembly 330 includes an adjustment bolt 331 and a second adjustment nut 332. The second adjustment nut 332 is mounted on the fixed shaft 3215. The adjustment bolt 331 is threadedly connected to the second adjustment nut 332 and is connected to the brake shoe 324. Therefore, when the inclination angle of the brake shoe 324 relative to the brake seat 321 needs to be adjusted, the corresponding adjustment can be made by adjusting the extension length of the adjustment bolt 331. Specifically, in this embodiment, the adjustment bolt 331 is in contact with the brake shoe 324 to adjust the inclination angle of the brake shoe 324 relative to the brake seat 321.

[0052] like Figure 3 and Figure 9 As shown, in one embodiment, the mounting body 100 includes a first positioning sleeve 110, a main shaft 120, a second positioning sleeve 130, a base 140, and a fixing plate 150. The main shaft 120 is horizontally mounted on the base 140. The fixing plate 150 is connected to the main shaft 120 and the base 140 to limit the position of the main shaft 120 relative to the base 140. The first positioning sleeve 110 and the second positioning sleeve 130 are both sleeved on the outer wall of the main shaft 120 to limit the relative positions of the rope pulley 210, the ratchet 310, and the main shaft 120. In this way, the main shaft 120 can be positioned by using a through rod in conjunction with the first positioning sleeve 110 and the second positioning sleeve 130, so that the main shaft 120 has a simple structure, is easy to process, and has reliable positioning.

[0053] Specifically in this embodiment, there are two first positioning sleeves 110, the two first positioning sleeves 110 are arranged at intervals, and the second positioning sleeve 130 is arranged between the two first positioning sleeves 110. The two sides of the pulley 210 respectively correspond to the second positioning sleeve 130 and one of the two first positioning sleeves 110 in a one-to-one conflicting fit, and the two sides of the ratchet 310 respectively correspond to the second positioning sleeve 130 and the other of the two first positioning sleeves 110 in a one-to-one conflicting fit.

[0054] In one embodiment, an elevator is provided, comprising the speed governor 10 according to any one of the above embodiments.

[0055] In the elevator of the above embodiment, when the speed governor 10 is in normal operation, the sheave 210 rotates at the rated speed. The initial pressing force provided by the spring assembly 240 is greater than the centrifugal force of the centrifugal hammer 220, and the centrifugal hammer 220 does not open. As a result, the pawl 230 is spaced apart from the ratchet 310 and rotates with the sheave 210, and the speed governor 10 does not operate. When the speed governor 10 is in overspeed operation, the centrifugal force of the centrifugal hammer 220 is greater than the initial pressing force provided by the spring assembly 240, and the centrifugal hammer 220 opens, causing the centrifugal hammer 220 to drive the pawl 230 toward the ratchet 310. When the pawl 230 engages with the ratchet 310, the force of the sheave 210 rotation is transmitted to the ratchet 310 through the centrifugal hammer 220 and the pawl 230, driving the ratchet 310 to rotate. In turn, the ratchet 310 drives the brake assembly 320 to rotate downward, thereby pressing the brake assembly 320 against the wire rope to pull the safety gear to stop the elevator. Compared with the current speed governor, the present application arranges the centrifugal hammer 220 and the pawl 230 on one side of the rope sheave 210, thereby preventing the centrifugal hammer 220 and the pawl 230 from extending into the inner wall of the rope sheave 210, which would cause the size of the rope sheave 210 to be too large. In addition, the centrifugal hammer 220 and the pawl 230 have a simple structure and a small size, so that the structure between the rope sheave 210 and the centrifugal hammer 220 and the pawl 230 is compact, thereby reducing the volume of the speed governor 10, thereby reducing the hoistway cross-sectional space occupied by the speed governor 10 when arranged in the elevator, having a simple structure and reliable performance, thereby improving the market competitiveness of the elevator.

[0056] Among them, the elevator can be a passenger elevator, a freight elevator, a car elevator, an escalator or a moving walkway, etc.

[0057] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0058] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0059] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0060] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0061] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0062] It should also be understood that when explaining the connection relationship or positional relationship of elements, even if not explicitly described, the connection relationship and positional relationship should be interpreted as including a range of error, which should be within the acceptable deviation range of the specific value determined by those skilled in the art. For example, "approximately," "approximately," or "substantially" can mean within one or more standard deviations, which is not limited here.

[0063] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A speed governor, characterized in that: include: Install the body; a rope pulley rotatably mounted on the mounting body; a centrifugal hammer rotatably mounted on one side of the rope pulley; A pawl, the pawl being mounted on the centrifugal hammer; a spring assembly, the spring assembly being mounted on the rope pulley and connected to the centrifugal hammer; and a braking device, the braking device comprising a ratchet and a brake assembly, the ratchet and the brake assembly being rotatably mounted on the mounting body, the ratchet being located on one side of the pawl and being transmission-connected to the brake assembly, so that the pawl can drive the brake assembly to move toward a side close to the rope pulley through the ratchet, so as to be in press-fit engagement with the steel wire rope on the rope pulley; a torsion spring, wherein the torsion spring is located between the centrifugal hammer and the pawl, and the two ends of the torsion spring are respectively connected to the centrifugal hammer and the pawl in a one-to-one correspondence. The spring assembly includes a speed regulating spring, a spring rod and a transmission shaft. A mounting portion is provided on the side of the pulley away from the centrifugal hammer, and one end of the spring rod is engaged with the mounting portion for movement along the axial direction of the spring rod. The speed regulating spring is sleeved on the outer side wall of the spring rod, and the centrifugal hammer is provided with a transmission hole. The other end of the spring rod is connected to one end of the transmission shaft, and the transmission shaft is passed through the transmission hole. The other end of the transmission shaft contacts and cooperates with the pawl to drive the pawl to engage with the ratchet; The brake assembly includes a brake seat, a pull rod, a brake spring and a brake shoe; the brake seat is rotatably connected to the mounting body, the brake seat is provided with a through hole, one end of the pull rod is rotatably connected to the ratchet, the pull rod is passed through the through hole, and the other end of the pull rod is provided with a resistance portion, the brake spring is sleeved on the outer side wall of the pull rod and is located between the resistance portion and the brake seat, the brake shoe is installed on the brake seat and is used to be crimped with the wire rope on the pulley.

2. The speed governor according to claim 1, characterized in that: The centrifugal hammer includes a counterweight end and a connecting end. Along the axial direction of the pulley, the thickness of the counterweight end is greater than the thickness of the connecting end. The side of the connecting end away from the pulley is located between the pulley and the side of the counterweight end away from the pulley. The pawl is installed on the side of the connecting end away from the pulley.

3. The speed governor according to claim 2, characterized in that: There are two centrifugal hammers, which are arranged along the circumferential direction of the rope pulley. The speed limiter also includes a connecting rod, and the two ends of the connecting rod are rotatably connected to the two connecting ends in a one-to-one correspondence.

4. The speed governor according to claim 3, characterized in that: The rope pulley is further provided with a supporting balance portion, which is used to balance the weight of the centrifugal hammer, the pawl, the spring assembly and the connecting rod.

5. The speed governor according to claim 1, characterized in that: The pawl is provided with a sharp corner portion, and the sharp corner portion is used to engage with the ratchet wheel.

6. The speed governor according to claim 1, characterized in that: The brake seat includes an upper seat body, a lower seat body, a pin shaft and a fixed shaft. The upper seat body is fixedly connected to the lower seat body and is inclined toward the side close to the rope pulley. The through hole is arranged on the upper seat body, and the lower seat body is provided with flanges on two opposite sides. The flanges are provided with a first mounting hole and a second mounting hole at intervals. The fixed shaft passes through the two first mounting holes and is rotatably connected to the mounting body. The pin shaft is correspondingly inserted into the two second mounting holes. The lower seat body is provided with a mounting groove. The brake shoe is passed through the mounting groove and fixedly connected to the pin shaft.

7. The speed governor according to claim 6, characterized in that: The braking device further includes an adjusting component, which is mounted on the fixed shaft and is used to adjust the inclination angle of the brake shoe relative to the lower seat body.

8. An elevator, characterized in that: Comprising the speed governor according to any one of claims 1 to 7.

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