One-way speed limiter for elevator safety

Abstract

The invention relates to the technical field of one-way speed limiters, in particular to a one-way speed limiter for elevator safety. Comprising a housing and a rope wheel rotationally connected with the inner side of the housing. A ratchet wheel and pawl assembly is arranged on the inner side of the housing; the inner wall of the housing is rotationally connected with a pressing seat; the upper position of the pressing seat is connected with the ratchet wheel and pawl assembly through a brace; sliding grooves are evenly formed in the front side and the rear side of the rope wheel close to the edge. A sliding block is connected into the sliding groove in a sliding mode. The sliding blocks are connected with the inner walls of the sliding grooves through springs. The arc-shaped outer wall of the rope wheel is connected with two annular plates in a front-back sliding mode. A pressing seat drives a pressing block to extrude two annular plates to be close to each other, so that a rope groove in the outer wall of the rope wheel is narrowed due to movement of the two annular plates, a steel wire rope in the rope groove is clamped through the two annular plates, and then the braking effect and timeliness of the steel wire rope are improved; and the running stability of the elevator speed governor is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of one-way speed limiter, in particular to a one-way speed limiter for elevator safety. BACKGROUND

[0002] In the modern elevator safety guarantee system, the one-way speed limiter is a crucial component, mainly installed in the roof machine room, closely connected with the elevator car through the speed limiter wire rope, and cooperates with the safety gear and other components to form the key defense line of the elevator overspeed protection. The one-way speed limiter is usually composed of twenty components such as speed limiter rope wheel, clamp block, trigger lock tongue, flail, ratchet, pawl and overspeed electric switch; its working principle exists passive and active two trigger modes.

[0003] Among them, the passive trigger mode is that when the elevator is running normally, the speed limiter rope rotates synchronously with the car movement to drive the speed limiter rope wheel; once the car moves at a speed exceeding the predetermined speed value of the speed limiter (usually 115% of the rated speed of the elevator), the flail is thrown outward due to the centrifugal force overcoming the internal spring resistance; this action first triggers the overspeed electric switch, causing the working brake to be braked due to power failure, trying to stop the car running; if the car speed is still not effectively controlled, it continues to increase to the limit value, the trigger lock tongue acts to drive the pawl to quickly enter the ratchet, thereby preventing the rope wheel from rotating; at the same time, the mechanical linkage will drive the clamp block (pressure block) to tightly press on the speed limiter wire rope, using the friction force to stop the wire rope, and then pull the safety gear to clamp the guide rail, and finally forcibly stop the car.

[0004] And for the active trigger mode, such as the one disclosed in the patent No. CN220201088U, entitled "Elevator speed limiter with reset structure"; it drives the guide rod to rotate through the driving device, and then drives the related components to act, finally makes the pawl enter the ratchet, realizes the brake of the speed limiter wheel (rope wheel), or such as the one disclosed in the patent No. CN219859977U, entitled "Structure for triggering elevator speed limiter", which is also an elevator speed limiter with active trigger function.

[0005] However, the existing one-way speed limiter has certain defects in actual application; the current speed limiter mainly relies on the pressure block to press the wire rope to realize braking, the contact area between the pressure block and the wire rope is limited, resulting in limited friction force and poor braking pressure effect; especially after a long time of use, impurities, oil stains and other impurities are easily attached to the surface of the wire rope, further reducing the friction force between them, making the braking timeliness greatly discounted, and it is difficult to meet the growing demand for elevator safety; therefore, the pressure structure of the speed limiter needs to be improved to increase the pressure area and improve the braking effect, and to ensure the safety of elevator operation. SUMMARY

[0006] In order to make up for the deficiencies of the prior art, the application provides a one-way speed limiter for elevator safety, which is characterized in that: the pressure seat drives the pressing block to extrude the two annular plates to move close to each other, so that the rope groove on the outer wall of the rope wheel is narrowed by the movement of the two annular plates, thereby clamping the steel wire rope in the rope groove through the two annular plates, and the braking effect and timeliness of the steel wire rope are improved, and the running stability of the elevator speed limiter is improved.

[0007] The technical scheme adopted by the application to solve the technical problems is: a one-way speed limiter for elevator safety, comprising a cover and a rope wheel rotatably connected to the inner side of the cover; a ratchet pawl assembly is arranged on the inner side of the cover; a pressure seat is rotatably connected to the inner wall of the cover; the pressure seat is connected to the ratchet pawl assembly through a stay at the upper position; a sliding groove is uniformly arranged at the edge position of the front and rear sides of the rope wheel; a sliding block is slidably connected in the sliding groove; the sliding block and the inner wall of the sliding groove are connected through a spring; two annular plates are slidably connected to the arc-shaped outer wall of the rope wheel; the two annular plates are fixedly connected to the corresponding sliding blocks; the two annular plates can slide in the front and rear directions along the sliding groove; two pressing blocks are connected to the side of the pressure seat close to the rope wheel; a guide slope is arranged on one side of the two pressing blocks close to each other; the two guide slopes are distributed in a spread shape; the distance between the two pressing blocks is less than the outer diameter of the steel wire rope; the two annular plates and the outer wall of the rope wheel form a rope groove; the steel wire rope passes through the rope groove and penetrates downward through the cover.

[0008] Preferably, the rear side of the annular plate at the front position is uniformly fixedly connected to a front stop block around the center; the front side of the annular plate at the rear position is uniformly fixedly connected to a rear stop block around the center.

[0009] Preferably, the front side of the annular plate at the front position is uniformly fixedly connected to a front stop block around the center; the front side of the annular plate at the rear position is uniformly fixedly connected to a rear stop block around the center.

[0010] Preferably, the rear side of the annular plate at the front position is uniformly fixedly connected to a front stop block around the center; the front side of the annular plate at the rear position is uniformly fixedly connected to a rear stop block around the center.

[0011] Preferably, the bottoms of the two corresponding sliding grooves of the rope wheel are connected by a circular hole; multiple telescopic sleeves pass through the circular hole; adjacent inner and outer telescopic sleeves are slidably and sealingly connected; the innermost telescopic sleeve is fixedly connected to the rear side of the annular plate at the front position, and the outermost telescopic sleeve is fixedly connected to the front side of the annular plate at the rear position; the front side of the annular plate at the rear position is provided with a rear groove corresponding to the rear anti-sliding block; the rear anti-sliding block is slidably and sealingly connected in the rear groove; the bottom of the rear groove is connected to the inner side of the telescopic sleeve through a rear liquid groove; the rear side of the annular plate at the front position is provided with a front groove corresponding to the front anti-sliding block; the front anti-sliding block is slidably and sealingly connected in the front groove; the front groove is connected to the inner side of the telescopic sleeve through a front liquid groove.

[0012] Preferably, the front anti-slip block and the rear anti-slip block are staggered in the circumferential direction of the rope wheel.

[0013] Preferably, both the rear liquid tank and the front liquid tank are arranged in annular shape; a rear arc-shaped strip is rotatably connected inside the rear liquid tank; a front arc-shaped strip is rotatably connected inside the front liquid tank; the cross-sections of the front and rear arc-shaped strips are C-shaped; the interiors of the plurality of telescopic sleeves are connected to the rear liquid tank and the front liquid tank on opposite sides; the front groove is connected to the rear inner wall of the front liquid tank, and the rear groove is connected to the front inner wall of the rear liquid tank; the recessed positions of the front and rear arc-shaped strips are opposite to each other.

[0014] Preferably, a magnet is embedded in the bottom wall of the housing; the front and rear arc-shaped strips are made of magnetic material and can be attracted by a magnet.

[0015] Preferably, the pressure base is provided with an adjustment groove corresponding to the pressure block through its inner and outer sides; the pressure base is fixedly connected to the front and rear of the adjustment rod; the pressure block slides back and forth in the adjustment groove; the adjustment hole on the pressure block slides back and forth with the adjustment rod; the adjustment hole extends outward and is threadedly connected to a bolt.

[0016] The beneficial effects of this invention are as follows: 1. This invention uses a pressure seat to drive a pressure block to squeeze two annular plates closer together, causing the rope groove on the outer wall of the rope wheel to narrow due to the movement of the two annular plates. This clamps the wire rope in the rope groove through the two annular plates, thereby improving the braking effect and timeliness of the wire rope and improving the operational stability of the elevator speed governor.

[0017] 2. In this invention, the front stop moves backward to confine the wire rope within the rope groove, and the rear stop moves forward to also confine the wire rope within the rope groove. This ensures that the wire rope is not squeezed out of the rope groove during the clamping process of the two annular plates, thereby improving the clamping stability of the wire rope and the braking stability of the wire rope.

[0018] 3. The present invention provides retractable front and rear anti-blocking blocks on the inner sides of the front and rear annular plates, which retract during non-braking of the wire rope and extend during braking of the wire rope. This satisfies both the braking effect on the wire rope during braking and the protection of the wire rope, front and rear anti-blocking blocks during non-braking. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 This is a diagram showing the position of the magnets in this invention; Figure 3 This is a perspective view of the rope pulley and pressure seat in this invention; Figure 4 This is a perspective view of the pressure seat and the pull rod in this invention; Figure 5 This is a perspective view of the rope wheel and the annular plate in this invention; Figure 6 yes Figure 5 A stereoscopic view from the rear; Figure 7 This is a perspective view of the front stop and the rear stop in this invention; Figure 8 This is a cross-sectional view of the annular plate at the rear position in this invention; Figure 9 This is a cross-sectional view of the rope pulley and the lower part of the annular plate in this invention.

[0021] In the diagram: 1. Cover 1, 11. Magnet 1, 2. Rope wheel 2, 21. Slide groove 2, 22. Circular hole 2, 23. Telescopic sleeve 2, 3. Ratchet and pawl assembly 3, 4. Pressure seat 4, 41. Pull bar 4, 42. Pressure block 4, 43. Guide slope 4, 44. Adjustment groove 4, 45. Adjustment rod 4, 46. Adjustment hole 47. Bolt 47. Sliding block 5, 51. Spring 5, 6. Annular plate 6, Rope groove 61, 62. Front anti-slip block 6, 63. Rear groove 64, Rear liquid groove 65, Front groove 66, Front liquid groove 67, Rear arc strip 68, Front arc strip 69, Front stop block 7, Guide arc surface 71, Reinforcing strip 72, Rear stop block 8, Reinforcing groove 81. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] like Figures 1 to 9 As shown, the present invention includes the following embodiments: Embodiment 1: a one-way speed limiter for elevator safety, comprising a housing 1 and a rope pulley 2 rotatably connected inside the housing 1; a ratchet pawl assembly 3 is arranged inside the housing 1; a pressure seat 4 is rotatably connected to the inner wall of the housing 1; the upper position of the pressure seat 4 is connected to the ratchet pawl assembly 3 through a tension bar 41; the rope pulley 2 is uniformly provided with a sliding groove 21 near the edge of the front and rear sides; a sliding block 5 is slidably connected in the sliding groove 21; the sliding block 5 and the inner wall of the sliding groove 21 are connected by a spring 51; two annular plates 6 are slidably connected to the arc-shaped outer wall of the rope pulley 2; the two annular plates 6 are fixedly connected to the corresponding sliding blocks 5; the two annular plates 6 can slide in the front and rear directions along the sliding groove 21; the pressure seat 4 is connected to two pressing blocks 42 on the side close to the rope pulley 2; the two pressing blocks 42 are provided with guide inclined surfaces 43 on the side close to each other; the two guide inclined surfaces 43 are distributed in a spreader shape; the distance between the two pressing blocks 42 is less than the outer diameter of the steel wire rope; the two annular plates 6 and the outer wall of the rope pulley 2 form a rope groove 61; the steel wire rope passes through the rope groove 61 and penetrates downward through the housing 1.

[0024] When the elevator is running normally, the steel wire rope moves with the movement of the car, and the rope pulley 2 is driven to rotate by the friction between the steel wire rope and the rope pulley 2. The two annular plates 6 on the outer wall of the rope pulley 2 are separated under the action of the spring 51, and the two annular plates 6 are in a state of moving away from each other, so that the steel wire rope can smoothly enter and move out of the rope groove 61, and the steel wire rope can be driven by the rotation of the rope pulley 2; under the normal speed of the rope pulley 2, the ratchet pawl assembly 3 is not locked, and once the moving speed of the car exceeds the predetermined speed value of the speed limiter, the flinger in the speed limiter is thrown outward due to the centrifugal force overcoming the internal spring resistance.

[0025] The action first triggers the overspeed electric switch, and the working brake is engaged due to power-off, trying to stop the car operation; if the car speed is still not effectively controlled, continue to increase to the limit value, trigger the lock tongue action, drive the pawl in the ratchet and pawl assembly 3 to quickly engage the ratchet, thereby preventing the rope wheel 2 from rotating, the steel wire rope drives the rope wheel 2 through friction to pull the pull bar 41 to move, the pull bar 41 drives the pressure seat 4 to rotate around the inner side of the cover 1, and the pressure seat 4 drives the two pressing blocks 42 to move close to the two annular plates 6 on the outer wall of the rope wheel 2 during the rotation. The guide inclined surface 43 on the two pressing blocks 42 is in contact with the respective annular plates 6, and under the guidance and extrusion of the guide inclined surface 43, the two annular plates 6 move close to each other, the annular plate 6 drives the sliding block 5 to move along the respective sliding groove 21 and overcome the elastic force of the spring 51, and the two annular plates 6 move close to each other, the annular plate 6 drives the sliding block 5 to move along the respective sliding groove 21 and overcome the elastic force of the spring 51. The width of the rope groove 61 gradually narrows during the movement of the two annular plates 6 close to each other, the space of the steel wire rope in the rope groove 61 gradually decreases, and the inner wall of the two annular plates 6 clamps the steel wire rope in the rope groove 61. Through the contact between the inner wall of the annular plate 6 and the outer wall of the steel wire rope, the pressing area of the steel wire rope is increased, the pressing effect of the steel wire rope is improved, the steel wire rope can be quickly and timely braked, and after the steel wire rope is braked, the safety gear is pulled to clamp the guide rail, and the car is finally forced to stop.

[0026] When the rope wheel 2 is rotated in the reverse direction to unlock the ratchet and pawl assembly 3, the rope wheel 2 controls the pull bar 41 to drive the pressure seat 4 away from the rope wheel 2, the pressure seat 4 drives the two pressing blocks 42 away from the rope wheel 2, the guide inclined surface 43 on the two pressing blocks 42 gradually reduces the limitation of the annular plate 6, the spring 51 pushes the sliding block 5 to slide along the sliding groove 21, the sliding block 5 drives the respective annular plate 6 to slide, the two annular plates 6 move away from each other, and the width of the rope groove 61 returns to the original width, so that the steel wire rope can drive the rope wheel 2 to rotate in the wider rope groove 61.

[0027] The present application drives the pressing block 42 to extrude the two annular plates 6 to move close to each other through the pressure seat 4, so that the rope groove 61 on the outer wall of the rope wheel 2 is narrowed by the movement of the two annular plates 6, thereby clamping the steel wire rope in the rope groove 61 through the two annular plates 6, and further improving the braking effect and timeliness of the steel wire rope. The running stability of the elevator speed governor is improved.

[0028] In example 2, the rear side of the annular plate 6 at the front position is uniformly fixed and connected with the front stop block 7 around the center; and the front side of the annular plate 6 at the rear position is uniformly fixed and connected with the rear stop block 8 around the center.

[0029] The front stop block 7 and the rear stop block 8 are provided with a guide arc surface 71 on the side close to the rope wheel 2; the front stop block 7 and the rear stop block 8 are arranged in a circumferential direction of the rope wheel 2; the rear stop block 8 is provided with a reinforcing groove 81 on one side in the circumferential direction; and the front stop block 7 is provided with a reinforcing strip 72 corresponding to the reinforcing groove 81 on one side in the circumferential direction.

[0030] In the process of driving the steel wire rope, the steel wire rope drives the rope wheel 2 to rotate, one end of the steel wire rope continuously enters the rope groove 61, and the other end continuously moves out of the rope groove 61. In the process of driving the steel wire rope, the two annular plates 6 are in a state of moving away from each other, and the front stopper 7 on the two annular plates 6 and the corresponding rear stopper 8 are in a state of moving away from each other. In this way, the gap between the front stopper 7 and the corresponding rear stopper 8 can be ensured to allow the steel wire rope to move in and out. In the process of one end of the steel wire rope entering the rope groove 61, if the front stopper 7 or the rear stopper 8 is touched, the steel wire rope will be guided by the guide arc surface 71 on the front stopper 7 or the rear stopper 8, so that the steel wire rope can smoothly enter the rope groove 61. In the process of the other end of the steel wire rope moving out of the rope groove 61, if the front stopper 7 or the rear stopper 8 is touched, the steel wire rope will be guided by the guide arc surface 71 on the front stopper 7 or the rear stopper 8, so that the steel wire rope can smoothly move out of the rope groove 61.

[0031] When the rope wheel 2 is overspeed, the stay 41 pulls the pressure seat 4 to approach the rope wheel 2, and the pressure seat 4 drives the pressure block 42 to extrude the annular plate 6, so that the two annular plates 6 move close to each other. The annular plate 6 at the front position moves backward to drive the front stopper 7 to move backward, and the annular plate 6 at the rear position moves forward to drive the rear stopper 8 to move forward. The front stopper 7 and the rear stopper 8 are arranged to be staggered in the circumferential direction of the rope wheel 2, so that the arrangement of the front stopper 7 does not affect the forward movement of the rear stopper 8, and the arrangement of the rear stopper 8 does not affect the backward movement of the front stopper 7. The front stopper 7 moves backward to limit the steel wire rope in the rope groove 61, and the rear stopper 8 moves forward to also limit the steel wire rope in the rope groove 61. In this way, when the two annular plates 6 clamp the steel wire rope in the rope groove 61, the steel wire rope cannot be squeezed out of the rope groove 61, so that the clamping stability of the steel wire rope is improved, and the braking stability of the steel wire rope is improved. Further, the reinforcing strip 72 on the front stopper 7 is aligned with the reinforcing groove 81 on the rear stopper 8, so that the reinforcing strip 72 is inserted into the corresponding reinforcing groove 81 during the backward movement of the stopper, thereby connecting the rear end of the front stopper 7 with the front end of the rear stopper 8, and further improving the strength of the front stopper 7 and the rear stopper 8 for limiting the steel wire rope, and further improving the stability of the steel wire rope braking. During the process of the pressure seat 4 driving the pressure block 42 to move away from the rope wheel 2, the two annular plates 6 move away from each other, the front stopper 7 drives the reinforcing strip 72 to move out of the reinforcing groove 81 on the rear stopper 8, and the front stopper 7 and the corresponding rear stopper 8 move away from each other to form a gap for the movement of the steel wire rope.

[0032] In example 3, the rear side of the annular plate 6 at the front position and close to the rope wheel 2 is uniformly provided with a front anti-skid block 62, and the front side of the annular plate 6 at the rear position and close to the rope wheel 2 is uniformly provided with a rear anti-skid block 63.

[0033] The groove bottom of the corresponding sliding groove 21 in front of and behind the rope wheel 2 is communicated through a round hole 22; a plurality of telescopic sleeves 23 pass through the round hole 22; the adjacent inner and outer telescopic sleeves 23 are slidingly and sealingly connected; the innermost telescopic sleeve 23 is fixedly connected to the rear side of the ring plate 6 at the front position, and the outermost telescopic sleeve 23 is fixedly connected to the front side of the ring plate 6 at the rear position; the front side of the ring plate 6 at the rear position is provided with a rear groove 64 corresponding to the rear anti-skid block 63; the rear anti-skid block 63 is slidingly and sealingly connected in the rear groove 64; the groove bottom of the rear groove 64 is communicated with the inner side of the telescopic sleeve 23 through a rear liquid groove 65; the rear side of the ring plate 6 at the front position is provided with a front groove 66 corresponding to the front anti-skid block 62; the front anti-skid block 62 is slidingly and sealingly connected in the front groove 66; the front groove 66 is communicated with the inner side of the telescopic sleeve 23 through a front liquid groove 67. The number of sliding grooves 21 is customized according to actual needs, and the adjacent inner and outer telescopic sleeves 23 can slide sealingly and cannot be separated.

[0034] In the process that the pressure seat 4 is pulled by the stay 41 to drive the pressing block 42 to extrude the ring plate 6, the two ring plates 6 will move close to each other, and the front anti-skid block 62 will move backward and the rear anti-skid block 63 will move forward during the process that the two ring plates 6 move close to each other, so that the ring plate 6 at the front position can drive the front anti-skid block 62 to contact the steel wire rope, and the ring plate 6 at the rear position can drive the rear anti-skid block 63 to contact the steel wire rope, and the steel wire rope has better braking effect under the friction of the front anti-skid block 62 and the rear anti-skid block 63; further, in the state that the two ring plates 6 move away from each other, the plurality of telescopic sleeves 23 are in an expanded state, the front anti-skid block 62 is in a state of being retracted to the front groove 66, and the rear anti-skid block 63 is in a state of being retracted to the rear groove 64, so as to avoid the influence of the front anti-skid block 62 and the rear anti-skid block 63 on the movement of the steel wire rope in the rope groove 61, avoid the wear of the front anti-skid block 62 and the rear anti-skid block 63 in the normal transmission process of the steel wire rope, and also avoid the wear of the steel wire rope in the normal transmission process of the steel wire rope, realize the protection of the front anti-skid block 62, the rear anti-skid block 63 and the steel wire rope, and ensure that the steel wire rope moves more smoothly in the rope groove 61 in the non-braking process.

[0035] And in the braking process, the two annular plates 6 close to each other, a plurality of telescopic sleeve 23 will be folded, a plurality of telescopic sleeve 23 inside the liquid medium will flow along the front liquid tank 67 and the rear liquid tank 65, the front liquid tank 67 out of the liquid medium will enter into the front groove 66, so that the front anti-skid block 62 in the front groove 66 out, the rear liquid tank 65 out of the liquid medium will enter into the rear groove 64, so that the rear anti-skid block 63 in the rear groove 64 out, the front position of the annular plate 6 will drive the front anti-skid block 62 back, the rear position of the annular plate 6 will drive the rear anti-skid block 63 forward, so that the rear anti-skid block 63 and the front anti-skid block 62 in the braking process increases the friction with the steel wire rope, realize more efficient braking; In the process of two annular plates 6 away from each other, the two annular plates 6 will drive a plurality of telescopic sleeve 23 to unfold, a plurality of telescopic sleeve 23 inside the negative pressure, the front groove 66 and the rear groove 64 inside the liquid medium back to the inside of a plurality of telescopic sleeve 23, the front anti-skid block 62 retract to the front groove 66, the rear anti-skid block 63 retract to the rear groove 64, the rope groove 61 re-smooth; The embodiment is set by the front and rear annular plate 6 inside the front anti-skid block 62 and the rear anti-skid block 63 can be telescopic, so as to retract in the process of steel wire rope non-braking, in the process of steel wire rope braking, so as to meet the braking effect of the steel wire rope in the braking process on the one hand, on the other hand, meet the protection of the steel wire rope, the front anti-skid block 62 and the rear anti-skid block 63 in the non-braking process.

[0036] Embodiment 4: the front anti-skid block 62 and the rear anti-skid block 63 are arranged in the circumferential direction of the rope wheel 2.

[0037] Because the front anti-skid block 62 and the rear anti-skid block 63 are arranged in the circumferential direction of the rope wheel 2, so in the process of two annular plates 6 close to each other, the front position of the annular plate 6 will drive the front anti-skid block 62 to extrude the steel wire rope to bend backward, the front and rear position of the annular plate 6 will drive the rear anti-skid block 63 to extrude the steel wire rope to bend forward, so that the steel wire rope in the rope groove 61 in the length direction back and forth to the front and rear bending, so as to further increase the friction of the steel wire rope in the rope groove 61, so that the steel wire rope can be quickly realized after the two annular plates 6 close to each other.

[0038] Embodiment 5: the rear liquid tank 65 and the front liquid tank 67 are arranged in the annular; the rear arc-shaped strip 68 is rotatably connected in the rear liquid tank 65; the front arc-shaped strip 69 is rotatably connected in the front liquid tank 67; the cross section of the front arc-shaped strip 69 and the rear arc-shaped strip 68 is shaped; a plurality of the telescopic sleeve 23 is communicated with the rear liquid tank 65 and the front liquid tank 67 away from each other; the front groove 66 is communicated with the rear inner wall of the front liquid tank 67, the rear groove 64 is communicated with the front inner wall of the rear liquid tank 65; the front arc-shaped strip 69 and the rear arc-shaped strip 68 are arranged away from the recessed position.

[0039] The inner bottom wall of the cover 1 is embedded with a magnet 11; the front arc-shaped strip 69 and the rear arc-shaped strip 68 are made of magnetic material and can be attracted by the magnet 11.

[0040] During the rotation of the two annular plates 6 along with the rotation of the rope wheel 2, the front arc-shaped strip 69 moves in the front liquid groove 67. Since the front arc-shaped strip 69 is arc-shaped, the front arc-shaped strip 69 always stays at the lower position of the front liquid groove 67 under the action of its own gravity, and the position of the front arc-shaped strip 69 is consistent with the position in the rope groove 61 without the steel wire rope. The front arc-shaped strip 69 will shield the front recess 66 at the lower position of the annular plate 6, but will not shield the front end of the plurality of telescopic sleeves 23. Thus, during the mutual approach of the two annular plates 6, the liquid medium in the plurality of telescopic sleeves 23 can enter the front liquid groove 67, and the liquid can only enter the front recess 66 outside the range of the front arc-shaped strip 69, thereby pushing the front anti-skid blocks 62 in the range outside the front arc-shaped strip 69 to extend and contact the steel wire rope, avoiding the invalid extension of the front anti-skid blocks 62 in the range of the front arc-shaped strip 69, and ensuring the extension force of the front anti-skid blocks 62 in the range outside the front arc-shaped strip 69.

[0041] Similarly, during the rotation of the two annular plates 6 along with the rotation of the rope wheel 2, the rear arc-shaped strip 68 moves in the rear liquid groove 65. Since the rear arc-shaped strip 68 is arc-shaped, the rear arc-shaped strip 68 always stays at the lower position of the rear liquid groove 65 under the action of its own gravity, and the position of the rear arc-shaped strip 68 is consistent with the range in the rope groove 61 without the steel wire rope. The rear arc-shaped strip 68 will shield the rear recess 64 at the lower position of the annular plate 6, but will not shield the rear end of the plurality of telescopic sleeves 23. Thus, during the mutual approach of the two annular plates 6, the liquid in the plurality of telescopic sleeves 23 can enter the rear liquid groove 65, and the liquid can only enter the rear recess 64 outside the range of the rear arc-shaped strip 68, thereby pushing the rear anti-skid blocks 63 in the range outside the rear arc-shaped strip 68 to extend and contact the steel wire rope, avoiding the invalid extension of the rear anti-skid blocks 63 in the range of the rear arc-shaped strip 68, and ensuring the extension force of the rear anti-skid blocks 63 in the range outside the rear arc-shaped strip 68. Further, by embedding the magnet 11 in the bottom wall in the cover 1, the front arc-shaped strip 69 and the rear arc-shaped strip 68 are always located close to the bottom wall in the cover 1 under the action of the magnetic force, ensuring that the front arc-shaped strip 69 and the rear arc-shaped strip 68 are consistent with the range of the wire groove 61 without the steel wire rope. It should be noted that, in order to ensure that the liquid can only enter the front groove 66 outside the range of the front arc-shaped strip 69, thereby pushing the front anti-skid block 62 in the range outside the front arc-shaped strip 69 to extend and contact the steel wire rope, avoiding the invalid extension of the front anti-skid block 62 in the range of the front arc-shaped strip 69, and ensuring the extrusion force of the front anti-skid block 62 in the range outside the front arc-shaped strip 69, a sealing ring can be sleeved at the end of the front arc-shaped strip 69 in use to prevent liquid from entering. Similarly, the liquid can only enter the rear groove 64 outside the range of the rear arc-shaped strip 68, thereby pushing the rear anti-skid block 63 in the range outside the rear arc-shaped strip 68 to extend and contact the steel wire rope, avoiding the invalid extension of the rear anti-skid block 63 in the range of the rear arc-shaped strip 68, and ensuring the extrusion force of the rear anti-skid block 63 in the range outside the rear arc-shaped strip 68. A sealing ring can be sleeved at the end of the rear arc-shaped strip 68 to prevent liquid from entering. The use of the sealing ring is prior art, and the present application will not be described in detail here.

[0042] In the embodiment 6, the adjusting grooves 44 corresponding to the pressing blocks 42 are arranged through the pressing seat 4; the adjusting rods 45 are fixedly connected to the front and rear of the pressing seat 4; the pressing blocks 42 slide in the adjusting grooves 44; the adjusting holes 46 on the pressing blocks 42 slide with the adjusting rods 45; and the adjusting holes 46 are outwardly penetrated and threadedly connected with the bolts 47.

[0043] When the bolts 47 are loosened, the bolts 47 are separated from the adjusting rods 45, the adjusting holes 46 on the pressing blocks 42 are unlocked with the adjusting rods 45, then the pressing blocks 42 are controlled to slide in the adjusting grooves 44 in the front and rear directions, so as to change the distance between the two pressing blocks 42, so that the pressing blocks 42 can be suitable for different pressing widths of the two annular plates 6, thereby meeting the pressing and braking requirements of the steel wire rope with different diameters. After the adjustment of the pressing blocks 42 is completed, the bolts 47 are tightened against the adjusting rods 45, so as to lock the pressing blocks 42.

[0044] It should be noted that the sliding sealing connection in the present application means that the connection can be sealed and cannot be separated.

[0045] In the description of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the drawings. Figure 1The shown orientation or positional relationship is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0046] The basic principles, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A one-way speed governor for elevator safety, comprising a housing and a pulley rotatably connected to the inner side of the housing; a ratchet and pawl assembly is provided on the inner side of the housing; a pressure seat is rotatably connected to the inner wall of the housing; the upper part of the pressure seat is connected to the ratchet and pawl assembly via a pull bar; characterized in that: The rope wheel has evenly spaced grooves near its edges on both the front and rear sides; sliding blocks are slidably connected within the grooves; the sliding blocks are connected to the inner wall of the grooves by springs; two annular plates are slidably connected to the arc-shaped outer wall of the rope wheel; the two annular plates are fixedly connected to corresponding sliding blocks; the two annular plates can slide along the grooves in the front-rear direction; two pressure blocks are connected to the pressure seat near the rope wheel; the two pressure blocks have guide slopes on their adjacent sides; the two guide slopes are arranged in a figure-eight shape; the distance between the two pressure blocks is less than the outer diameter of the wire rope; the two annular plates and the outer wall of the rope wheel form a rope groove; the wire rope passes around the rope groove and downwards through the cover.

2. A one-way governor for elevator safety according to claim 1, characterized in that: The annular plate at the front position has a front stop block evenly fixedly connected to its rear side around the center; the annular plate at the rear position has a rear stop block evenly fixedly connected to its front side around the center.

3. A one-way governor for elevator safety according to claim 2, characterized in that: The front stop and the rear stop are provided with guide arc surfaces on the side of the rope wheel; the front stop and the rear stop are offset from each other in the circumferential direction of the rope wheel; the rear stop is provided with a reinforcing groove on one side in the circumferential direction; the front stop is provided with a reinforcing strip corresponding to the reinforcing groove on one side in the circumferential direction.

4. A one-way governor for elevator safety according to claim 1, characterized in that: Front anti-blocking blocks are evenly distributed on the rear side of the annular plate near the rope wheel; rear anti-blocking blocks are evenly distributed on the front side of the annular plate near the rope wheel.

5. A one-way governor for elevator safety according to claim 4, characterized in that: The bottoms of the two corresponding sliding grooves at the front and rear of the rope wheel are connected by a circular hole; multiple telescopic sleeves pass through the circular hole; Two adjacent inner and outer telescopic sleeves are slidably and sealed together; the innermost telescopic sleeve is fixedly connected to the rear side of the annular plate at the front position, and the outermost telescopic sleeve is fixedly connected to the front side of the annular plate at the rear position; a rear groove corresponding to the rear anti-sliding block is provided on the front side of the annular plate at the rear position; the rear anti-sliding block is slidably and sealed together in the rear groove; the bottom of the rear groove is connected to the inner side of the telescopic sleeve through a rear liquid groove; a front groove corresponding to the front anti-sliding block is provided on the rear side of the annular plate at the front position; the front anti-sliding block is slidably and sealed together in the front groove; the front groove is connected to the inner side of the telescopic sleeve through a front liquid groove.

6. A one-way governor for elevator safety according to claim 4, characterized in that: The front and rear anti-blocking blocks are staggered in the circumferential direction of the rope wheel.

7. A one-way governor for elevator safety according to claim 5, characterized in that: Both the rear liquid tank and the front liquid tank are arranged in annular shape; a rear arc-shaped strip is rotatably connected inside the rear liquid tank; a front arc-shaped strip is rotatably connected inside the front liquid tank; the cross-sections of the front and rear arc-shaped strips are C-shaped; the interiors of the multiple telescopic sleeves are connected to the rear liquid tank and the front liquid tank on opposite sides; the front groove is connected to the rear inner wall of the front liquid tank, and the rear groove is connected to the front inner wall of the rear liquid tank; the recessed positions of the front and rear arc-shaped strips are opposite to each other.

8. A one-way governor for elevator safety according to claim 7, characterized in that: The bottom wall of the casing is embedded with magnets; the front and rear arc-shaped strips are made of magnetic material and can be attracted by magnets.

9. A one-way governor for elevator safety according to claim 1, characterized in that: The pressure base has an adjustment groove corresponding to the pressure block through its inner and outer sides; the pressure base is fixedly connected to the front and rear of the adjustment rod; the pressure block slides back and forth in the adjustment groove; the adjustment hole on the pressure block slides back and forth with the adjustment rod; the adjustment hole extends outward and is threadedly connected to a bolt.

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