A one-way speed governor for elevator safety

Abstract

This invention relates to the field of one-way speed governor technology, specifically a one-way speed governor for elevator safety; it includes a housing and a rope 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; the front and rear sides of the rope pulley are evenly provided with sliding grooves near the edges; a sliding block is slidably connected in the sliding groove; the sliding block is connected to the inner wall of the sliding groove by a spring; two annular plates are slidably connected to the arc-shaped outer wall of the rope pulley; this invention uses the pressure seat to drive the pressure block to squeeze the two annular plates closer together, so that the rope groove on the outer wall of the rope pulley is narrowed by the movement of the two annular plates, thereby clamping the wire rope in the rope groove through the two annular plates, thus improving the braking effect and timeliness of the wire rope; and improving the operational stability of the elevator speed governor.

Description

Technical Field

[0001] This invention relates to the field of one-way speed governor technology, specifically a one-way speed governor for elevator safety. Background Technology

[0002] In modern elevator safety systems, the one-way speed governor is a crucial component. Primarily installed in the rooftop machine room, it is tightly connected to the elevator car via a speed governor cable and works in conjunction with safety brakes and other components to form a critical line of defense against elevator overspeed. A one-way speed governor typically consists of over twenty components, including the speed governor pulley, clamping block, trigger latch, swing block, ratchet, pawl, and overspeed electrical switch. Its operating principle employs both passive and active triggering modes.

[0003] In the passive triggering mode, during normal elevator operation, the governor rope moves with the car, causing the governor rope wheel to rotate synchronously. Once the car's speed exceeds the governor's predetermined speed value (usually 115% of the elevator's rated speed), the swing block overcomes the internal spring resistance and swings outward due to centrifugal force. This action first triggers the overspeed electrical switch, causing the working brake to engage due to power failure, attempting to stop the car's movement. If the car speed is still not effectively controlled, it continues to increase to the limit value, triggering the locking tongue action, driving the pawl to quickly engage the ratchet, thereby preventing the rope wheel from rotating. At the same time, the mechanical linkage will cause the clamping block (pressure block) to press tightly against the governor wire rope, using friction to brake the wire rope, which in turn pulls the safety clamp to clamp the guide rail, ultimately forcibly stopping the car.

[0004] As for the active triggering mode, there is the case of CN220201088U, the subject of which is "An elevator speed governor with a reset structure". It drives the guide rod to rotate through the drive device, which in turn drives the relevant components to move, and finally makes the pawl engage the ratchet, so as to realize the braking of the speed governor wheel (rope wheel). Or, there is CN219859977U, the subject of which is "A structure for triggering an elevator speed governor", which is also an elevator speed governor with active triggering function.

[0005] However, existing one-way speed governors have certain shortcomings in practical applications. Currently, speed governors mainly rely on pressure blocks to tighten the wire rope to achieve braking. The limited contact area between the pressure blocks and the wire rope results in limited friction and poor braking effect. Especially after long-term use, impurities and oil stains easily adhere to the surface of the wire rope, further reducing the friction between the two and significantly compromising the timeliness of braking, making it difficult to meet the ever-increasing elevator safety requirements. Therefore, it is necessary to improve the pressure structure of the speed governor to increase the pressure area, improve the braking effect, and ensure the safe operation of the elevator. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies, this invention proposes a one-way speed governor for elevator safety. 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 enhancing the operational stability of the elevator speed governor.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: A one-way speed limiter for elevator safety, as described in the present invention, includes a housing and a rope wheel 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 pressure seat is connected to the ratchet and pawl assembly at its upper position via a pull bar; a sliding groove is evenly provided on the front and rear sides of the rope wheel near its edge; a sliding block is slidably connected in the sliding groove; the sliding block is connected to the inner wall of the sliding groove via 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 along the sliding groove in the front and rear direction; two pressure blocks are connected to the side of the pressure seat near the rope wheel; a guide slope is provided on the side of the two pressure blocks close to each other; the two guide slopes are distributed 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 downward through the housing.

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

[0009] Preferably, the front stop and the rear stop are provided with guide arc surfaces on the side of the rope pulley; the front stop and the rear stop are offset from each other in the circumferential direction of the rope pulley; the rear stop is provided with a reinforcing groove on one side in the circumferential direction; and the front stop is provided with a reinforcing strip corresponding to the reinforcing groove on one side in the circumferential direction.

[0010] Preferably, front anti-blocking blocks are evenly arranged on the rear side of the annular plate at the front position and near the rope wheel; rear anti-blocking blocks are evenly arranged on the front side of the annular plate at the rear position and near the rope wheel.

[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:

[0017] 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.

[0018] 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.

[0019] 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

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2 This is a diagram showing the position of the magnets in this invention;

[0023] Figure 3 This is a perspective view of the rope pulley and pressure seat in this invention;

[0024] Figure 4 This is a perspective view of the pressure seat and the pull rod in this invention;

[0025] Figure 5 This is a perspective view of the rope wheel and the annular plate in this invention;

[0026] Figure 6 yes Figure 5 A stereoscopic view from the rear;

[0027] Figure 7 This is a perspective view of the front stop and the rear stop in this invention;

[0028] Figure 8 This is a cross-sectional view of the annular plate at the rear position in this invention;

[0029] Figure 9 This is a cross-sectional view of the rope pulley and the lower part of the annular plate in this invention.

[0030] 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

[0031] 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.

[0032] like Figures 1 to 9 As shown, the present invention includes the following embodiments:

[0033] Example 1: A one-way speed limiter for elevator safety includes a housing 1 and a pulley 2 rotatably connected to the inner side of the housing 1; a ratchet and pawl assembly 3 is provided on the inner side of the housing 1; a pressure seat 4 is rotatably connected to the inner wall of the housing 1; the pressure seat 4 is connected to the ratchet and pawl assembly 3 at its upper position via a pull bar 41; the pulley 2 has evenly distributed grooves 21 near its edges on its front and rear sides; a sliding block 5 is slidably connected within the groove 21; the sliding block 5 is connected to the inner wall of the groove 21 via a spring 51; the arc-shaped outer wall of the pulley 2 slides forward and backward... Two annular plates 6 are movably connected; the two annular plates 6 are fixedly connected to corresponding sliding blocks 5; the two annular plates 6 can slide back and forth along the sliding groove 21; the pressure seat 4 is connected to two pressure blocks 42 on the side near the rope wheel 2; the two pressure blocks 42 are provided with guide slopes 43 on their side close to each other; the two guide slopes 43 are distributed in a figure-eight shape; the distance between the two pressure blocks 42 is less than the outer diameter of the wire rope; the two annular plates 6 and the outer wall of the rope wheel 2 form a rope groove 61; the wire rope passes around the rope groove 61 and passes downward through the cover 1.

[0034] During normal elevator operation, the wire rope moves with the car. The friction between the wire rope and the pulley 2 drives the pulley 2 to rotate. The two annular plates 6 on the outer wall of the pulley 2 are opened by the action of the spring 51, and the two annular plates 6 are in a state of being far apart from each other. This allows the wire rope to smoothly enter and exit the rope groove 61, so that the wire rope can be transmitted with the rotation of the pulley 2. Under normal speed of the pulley 2, the ratchet and pawl assembly 3 is not locked. Once the car's moving speed exceeds the speed limiter's predetermined speed value, the swing block in the speed limiter overcomes the internal spring resistance and swings outward due to centrifugal force.

[0035] This action first triggers the overspeed electrical switch, causing the working brake to engage due to power failure, attempting to stop the car's operation. If the car speed is still not effectively controlled, it continues to increase to the limit value, triggering the locking tongue action. This drives the pawl in the ratchet and pawl assembly 3 to quickly engage the ratchet, thereby preventing the rope wheel 2 from rotating. The wire rope, through friction, drives the rope wheel 2 to pull the pull bar 41. The pull bar 41 will cause the pressure seat 4 to rotate around the inside of the cover 1. During the rotation of the pressure seat 4, it will cause the two pressure blocks 42 to approach the two annular plates 6 on the outer wall of the rope wheel 2. The guide slopes 43 on the two pressure blocks 42 will contact their respective annular plates 6. Under the guiding compression, the two annular plates 6 move closer to each other. The annular plates 6 drive the sliding blocks 5 to move along their respective grooves 21 and overcome the elastic force of the springs 51. As the two annular plates 6 move closer to each other, the width of the rope groove 61 gradually narrows, and the space of the wire rope in the rope groove 61 gradually decreases. The inner walls of the two annular plates 6 clamp the wire rope in the rope groove 61. Through the contact between the inner wall of the annular plates 6 and the outer wall of the wire rope, the clamping area of ​​the wire rope is increased, and the clamping effect of the wire rope is improved, so that the wire rope can quickly and timely complete the braking. After the wire rope brakes, the safety clamp is pulled to clamp the guide rail, and finally the car is forcibly stopped.

[0036] When the rope wheel 2 is rotated in the opposite direction to unlock the ratchet and pawl assembly 3, the rope wheel 2 will control the pull bar 41 to move the pressure seat 4 away from the rope wheel 2. The pressure seat 4 will move the two pressure blocks 42 away from the rope wheel 2. The guide slope 43 on the two pressure blocks 42 gradually reduces the restriction on the annular plate 6. The spring 51 will push the sliding block 5 to slide along the slide groove 21. The sliding block 5 will drive its respective annular plate 6 to slide. The two annular plates 6 move away from each other, so that the rope groove 61 returns to its original width. In this way, the wire rope can drive the rope wheel 2 to rotate in the wider rope groove 61.

[0037] The present invention uses the pressure seat 4 to drive the pressure block 42 to squeeze the two annular plates 6 closer to each other, 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 wire rope in the rope groove 61 through the two annular plates 6, thereby improving the braking effect and timeliness of the wire rope; thus improving the operating stability of the elevator speed governor.

[0038] Example 2: The annular plate 6 at the front position is uniformly fixedly connected to the front stop 7 around the center on the rear side; the annular plate 6 at the rear position is uniformly fixedly connected to the rear stop 8 around the center on the front side.

[0039] The front stop 7 and the rear stop 8 are provided with a guide arc surface 71 on the side near the rope wheel 2; the front stop 7 and the rear stop 8 are offset from each other in the circumferential direction of the rope wheel 2; the rear stop 8 is provided with a reinforcing groove 81 on one side in the circumferential direction; the front stop 7 is provided with a reinforcing strip 72 corresponding to the reinforcing groove 81 on one side in the circumferential direction.

[0040] During the transmission of the wire rope, the wire rope drives the pulley 2 to rotate. One end of the wire rope continuously enters the rope groove 61, and the other end continuously moves out of the rope groove 61. During the transmission of the wire rope, the two annular plates 6 are in a state of mutual distance, and the front stop 7 and the corresponding rear stop 8 on the two annular plates 6 are in a state of mutual distance. This ensures that the gap between the front stop 7 and the corresponding rear stop 8 is sufficient for the wire rope to move in and out. When one end of the wire rope enters the rope groove 61, if it touches the front stop 7 or the rear stop 8, it will be guided by the guide arc surface 71 on the front stop 7 or the rear stop 8, so that the wire rope can smoothly enter the rope groove 61. When the other end of the wire rope moves out of the rope groove 61, if it touches the front stop 7 or the rear stop 8, it will be guided by the guide arc surface 71 on the front stop 7 or the rear stop 8, so that the wire rope can smoothly move out of the rope groove 61.

[0041] When the pulley 2 overspeeds, the pull bar 41 will be triggered, pulling the pressure seat 4 closer to the pulley 2. The pressure seat 4 will drive the pressure block 42 to squeeze the annular plate 6, causing the two annular plates 6 to move closer to each other. As the annular plate 6 in the front position moves backward, it will drive the front stop 7 to move backward, and as the annular plate 6 in the rear position moves forward, it will drive the rear stop 8 to move forward. The front stop 7 and the rear stop 8 are offset upward around the pulley 2, so the setting of the front stop 7 will not affect the forward movement of the rear stop 8, and the setting of the rear stop 8 will not affect the backward movement of the front stop 7. After the front stop 7 moves backward, it will confine the wire rope into the rope groove 61, and after the rear stop 8 moves forward, it will also confine the wire rope into the rope groove 61. In this way, during the process of the two annular plates 6 clamping the wire rope in the rope groove 61, the wire rope will not fall out of the rope groove. The steel wire rope is squeezed out of the groove 61, thereby improving the clamping stability and braking stability of the steel wire rope. Furthermore, the reinforcing strip 72 on the front stop 7 is aligned with the reinforcing groove 81 on the rear stop 8. Therefore, the reinforcing strip 72 will be inserted into the corresponding reinforcing groove 81 as the stop moves backward, thereby connecting the rear end of the front stop 7 with the front end of the rear stop 8, thereby improving the strength of the front stop 7 and the rear stop 8 in limiting the steel wire rope and further improving the braking stability of the steel wire rope. As the pressure seat 4 drives the pressure block 42 away from the rope wheel 2, the two annular plates 6 will move away from each other. The front stop 7 will drive the reinforcing strip 72 to move out of the reinforcing groove 81 on the rear stop 8. The front stop 7 and the corresponding rear stop 8 will move away from each other and form a gap for the steel wire rope to move.

[0042] Example 3: Front anti-slip blocks 62 are evenly arranged on the rear side of the annular plate 6 at the front position and near the rope wheel 2; rear anti-slip blocks 63 are evenly arranged on the front side of the annular plate 6 at the rear position and near the rope wheel 2.

[0043] The bottoms of the two corresponding sliding grooves 21 of the rope wheel 2 are connected by a circular hole 22; multiple telescopic sleeves 23 pass through the circular hole 22; adjacent inner and outer telescopic sleeves 23 are slidably and sealingly connected; the innermost telescopic sleeve 23 is fixedly connected to the rear side of the annular plate 6 at the front position, and the outermost telescopic sleeve 23 is fixedly connected to the front side of the annular plate 6 at the rear position; the front side of the annular plate 6 at the rear position is provided with a rear groove 64 corresponding to the rear anti-sliding slider 63; the rear anti-sliding slider 63 is slidably and sealingly connected in the rear groove 64; the bottom of the rear groove 64 is connected to the inner side of the telescopic sleeve 23 through a rear liquid groove 65; the rear side of the annular plate 6 at the front position is provided with a front groove 66 corresponding to the front anti-sliding slider 62; the front anti-sliding slider 62 is slidably and sealingly connected in the front groove 66; the front groove 66 is connected to the inner side of the telescopic sleeve 23 through a front liquid groove 67.

[0044] The number of grooves 21 is customized according to actual needs, and the two adjacent inner and outer telescopic sleeves 23 can slide and seal against each other and cannot be separated.

[0045] During the process of the pressure seat 4 being pulled by the pull bar 41 and causing the pressure block 42 to squeeze the annular plate 6, the two annular plates 6 will move closer to each other. This movement causes the front anti-slip block 62 to move backward and the rear anti-slip block 63 to move forward. This allows the annular plate 6 in the forward position to bring the front anti-slip block 62 into contact with the wire rope, and also allows the annular plate 6 in the rear position to bring the rear anti-slip block 63 into contact with the wire rope. The braking effect of the wire rope is improved under the frictional force of the front and rear anti-slip blocks 62 and 63. Furthermore, when the two annular plates 6 are moving away from each other, the multiple telescopic sleeves 23... In the deployed state, the front anti-slip block 62 is retracted into the front groove 66, and the rear anti-slip block 63 is retracted into the rear groove 64. This prevents the front anti-slip block 62 and the rear anti-slip block 63 from affecting the movement of the wire rope in the rope groove 61, avoids wear on the front anti-slip block 62 and the rear anti-slip block 63 during normal wire rope transmission, and also prevents the wire rope from being worn by the front anti-slip block 62 and the rear anti-slip block 63 during normal wire rope transmission. This achieves protection for the front anti-slip block 62, the rear anti-slip block 63, and multiple components of the wire rope, and also ensures smoother movement of the wire rope in the rope groove 61 when not braking.

[0046] During braking, the two annular plates 6 approach each other, and the multiple telescopic sleeves 23 overlap. The liquid medium inside the multiple telescopic sleeves 23 flows out along the front liquid groove 67 and the rear liquid groove 65. The liquid medium flowing out of the front liquid groove 67 enters the front groove 66, causing the front anti-slip block 62 in the front groove 66 to extend. The liquid medium flowing out of the rear liquid groove 65 enters the rear groove 64, causing the rear anti-slip block 63 in the rear groove 64 to extend. The annular plate 6 at the front position will drive the front anti-slip block 62 to move backward, and the annular plate 6 at the rear position will... The rear anti-blocking slider 63 moves forward, thereby increasing the friction between the rear anti-blocking slider 63 and the front anti-blocking slider 62 and the wire rope during braking, achieving more efficient braking. As the two annular plates 6 move away from each other without braking, the two annular plates 6 will cause multiple telescopic sleeves 23 to unfold, forming a negative pressure inside the multiple telescopic sleeves 23. The liquid medium in the front groove 66 and the rear groove 64 flows back to the inside of the multiple telescopic sleeves 23, the front anti-blocking slider 62 retracts into the front groove 66, the rear anti-blocking slider 63 retracts into the rear groove 64, and the rope groove 61 returns to smoothness.

[0047] In this embodiment, a retractable front anti-slip block 62 and a rear anti-slip block 63 are provided on the inner side of the front and rear annular plates 6. These retract during the non-braking process of the wire rope and extend during the braking process of the wire rope. This satisfies the braking effect of the wire rope during the braking process and the protection of the wire rope, the front anti-slip block 62 and the rear anti-slip block 63 during the non-braking process.

[0048] Example 4: The front anti-slip block 62 and the rear anti-slip block 63 are staggered in the circumference of the rope wheel.

[0049] Because the front anti-blocking slider 62 and the rear anti-blocking slider 63 are offset upwards around the rope wheel, as the two annular plates 6 approach each other, the annular plate 6 at the front position will cause the front anti-blocking slider 62 to squeeze the wire rope and bend it backwards, while the annular plates 6 at the front and rear positions will cause the rear anti-blocking slider 63 to squeeze the wire rope and bend it forwards. In this way, the wire rope in the rope groove 61 bends back and forth forward and backward in the length direction, which further increases the friction of the wire rope in the rope groove 61, so that the wire rope can quickly achieve braking after the two annular plates 6 approach each other.

[0050] Example 5: Both the rear liquid groove 65 and the front liquid groove 67 are annular; a rear arc-shaped strip 68 is rotatably connected inside the rear liquid groove 65; a front arc-shaped strip 69 is rotatably connected inside the front liquid groove 67; the cross-sections of the front arc-shaped strip 69 and the rear arc-shaped strip 68 are U-shaped; the interiors of the multiple telescopic sleeves 23 are connected to the rear liquid groove 65 and the front liquid groove 67 on opposite sides; the front groove 66 is connected to the rear inner wall of the front liquid groove 67, and the rear groove 64 is connected to the front inner wall of the rear liquid groove 65; the recessed positions of the front arc-shaped strip 69 and the rear arc-shaped strip 68 are opposite to each other.

[0051] The inner bottom wall of the cover 1 is embedded with a magnet 11; the front arc strip 69 and the rear arc strip 68 are made of magnetic material and can be attracted by the magnet 11.

[0052] As the two annular plates 6 rotate with the pulley 2, the front arc-shaped strip 69 moves within the front liquid groove 67. Because the front arc-shaped strip 69 is arc-shaped, it remains in a lower position within the front liquid groove 67 under its own weight. The position of the front arc-shaped strip 69 is consistent with the position in the rope groove 61 where there is no wire rope. The front arc-shaped strip 69 blocks the front groove 66 at the lower position of the annular plate 6, but does not block the front end of the multiple telescopic sleeves 23. Thus, as the two annular plates 6 approach each other, the liquid medium inside the multiple telescopic sleeves 23 can enter the front liquid groove 67. The liquid can only enter the front groove 66 outside the range of the front arc-shaped strip 69, thereby pushing the front anti-sliding block 62 outside the range of the front arc-shaped strip 69 to extend and contact the wire rope, preventing the front anti-sliding block 62 within the range of the front arc-shaped strip 69 from extending ineffectively, and ensuring the pushing force of the front anti-sliding block 62 outside the range of the front arc-shaped strip 69.

[0053] Similarly, as the two annular plates 6 rotate with the rope wheel 2, the rear arc-shaped strip 68 moves within the rear liquid groove 65. The rear arc-shaped strip 68 is arc-shaped, so under its own weight, it is always located at the lower part of the rear liquid groove 65. The position of the rear arc-shaped strip 68 is consistent with the area in the rope groove 61 where there is no wire rope. The rear arc-shaped strip 68 will block the rear groove 64 at the lower part of the annular plate 6, but will not block the rear end of the multiple telescopic sleeves 23. Thus, as the two annular plates 6 approach each other, the liquid in the multiple telescopic sleeves 23 can enter the rear liquid groove 65. The liquid can only enter the rear groove 64 outside the range of the rear arc-shaped strip 68, thereby pushing the rear anti-sliding block 63 outside the range of the rear arc-shaped strip 68 to extend and contact the wire rope, avoiding the ineffective extension of the rear anti-sliding block 63 within the range of the rear arc-shaped strip 68, and ensuring the pushing force of the rear anti-sliding block 63 outside the range of the rear arc-shaped strip 68.

[0054] Furthermore, by embedding a magnet 11 in the bottom wall inside the housing 1, the front arc-shaped strip 69 and the rear arc-shaped strip 68 are always positioned close to the bottom wall inside the housing 1 under the action of magnetic force. This ensures that the front arc-shaped strip 69 and the rear arc-shaped strip 68 are aligned with the area of ​​the rope groove 61 where there is no 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-slip block 62 outside the range of the front arc-shaped strip 69 to extend and contact the wire rope, this prevents the front anti-slip block 62 within the range of the front arc-shaped strip 69 from extending ineffectively, ensuring that the front anti-slip block 62 outside the range of the front arc-shaped strip 69 extends. To ensure the ejection force of the anti-slip block 62, a sealing ring can be fitted at the end of the front arc-shaped strip 69 during use to prevent liquid from entering. Similarly, liquid can only enter the rear groove 64 outside the range of the rear arc-shaped strip 68, thereby pushing the rear anti-slip block 63 outside the range of the rear arc-shaped strip 68 to extend and contact the wire rope, avoiding ineffective extension of the rear anti-slip block 63 within the range of the rear arc-shaped strip 68. To ensure the ejection force of the rear anti-slip block 63 outside the range of the rear arc-shaped strip 68, a sealing ring can be fitted at the end of the rear arc-shaped strip 68 to prevent liquid from entering. The use of the sealing ring is existing technology and will not be elaborated on further in this invention.

[0055] Example 6: The pressure base 4 is provided with an adjustment groove 44 corresponding to the pressure block 42 through the inside and outside; the pressure base 4 is fixedly connected to the front and rear of the adjustment rod 45; the pressure block 42 slides back and forth in the adjustment groove 44; the adjustment hole 46 on the pressure block 42 slides back and forth with the adjustment rod 45; the adjustment hole 46 is outwardly penetrating and threadedly connected to the bolt 47.

[0056] With bolt 47 loosened, bolt 47 is disengaged from adjusting rod 45, unlocking adjusting hole 46 on pressure block 42 from adjusting rod 45. Then, pressure block 42 is controlled to slide back and forth along adjusting groove 44, thereby changing the distance between the two pressure blocks 42. This allows pressure block 42 to be adapted to different clamping widths of the two annular plates 6, thus meeting the clamping and braking requirements of wire ropes of different diameters. After adjusting pressure block 42, bolt 47 is tightened against adjusting rod 45 to lock pressure block 42.

[0057] It should be noted that the sliding sealing connection in this invention refers to a connection that can slide and seal but cannot be detached.

[0058] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description only, and are not intended to 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 limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be construed as indicating or implying relative importance.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention 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 speed 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 speed limiter 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 speed limiter 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 speed 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 speed 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 speed 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 speed 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 speed 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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