Compact-structure tension spring type ratchet pressure integrated centrifugal flail block speed limiter

Abstract

The utility model discloses a compact-structure tension spring type ratchet pressure integrated centrifugal flail block speed governor which comprises a mounting seat and a switch, a rope wheel is rotatably mounted on the inner side of the mounting seat through a rope wheel shaft, a ratchet mechanism is mounted on the inner side of the mounting seat, the ratchet mechanism comprises a ratchet wheel and a pawl, the ratchet wheel is rotatably sleeved on the rope wheel, and the pawl is sleeved on the ratchet wheel. A limiting mechanism used for preventing the ratchet wheel from rotating is arranged on the ratchet wheel, a first flail block and a second flail block are hinged to the rope wheel, the pawl is rotationally installed on the rope wheel, and the first flail block is connected with the upper end of the pawl through a first tension spring. The first tension spring on the pawl is installed on the first flail block, a pressing claw and a torsion spring mechanism of a similar speed limiter are omitted, when the speed limiter normally operates, the first flail block and the pawl synchronously rotate, the pawl does not have relative sliding friction, the service life is prolonged, and the maintenance requirement is reduced.

Description

Technical Field

[0001] This utility model relates to the field of speed limiter technology, and in particular to a compact centrifugal speed limiter with integrated tension spring and ratchet mechanism. Background Technology

[0002] The currently used pawl-ratchet type speed limiter has the following drawbacks:

[0003] (1) When the speed limiter is running normally, the rope wheel rotates and the swing block is subjected to centrifugal force, which rotates to a certain extent, causing the pawl and the pressure pawl to slide and rub repeatedly at the contact position. When a certain amount of wear occurs, it affects the speed limiter's operating speed. Moreover, the torsion spring on the pressure pawl will give the swing block a reaction force through the pressure pawl and the set screw, which restricts the swing block.

[0004] (2) When manually triggered, the pawl needs to be released by triggering the pressure pawl or the swing block to perform mechanical or electrical actions;

[0005] (3) After the mechanical action, the pressure pawl needs to be manually rotated to reset the pawl;

[0006] (4) When the speed limiter is running, the compression spring is compressed. The contact surface between the guide screw and the spring seat, and the contact surface between the square pin shaft and the cylinder all affect the force provided by the spring.

[0007] (5) The ratchet limit shaft is usually fixed to the side plate with threads, which has relatively low strength.

[0008] To address this, a compact, tension-spring type integrated ratchet centrifugal speed limiter for slinging blocks is proposed. Utility Model Content

[0009] The purpose of this invention is to provide a compact, tension-spring type integrated ratchet centrifugal speed limiter, thereby solving or at least alleviating one or more of the aforementioned and other problems existing in the prior art.

[0010] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0011] A compact, spring-loaded, ratchet-operated centrifugal speed limiter includes a mounting base and a switch. A rope wheel is rotatably mounted on the inner side of the mounting base via a rope wheel shaft, and a ratchet mechanism is mounted on the inner side of the mounting base.

[0012] The ratchet mechanism includes a ratchet and a pawl. The ratchet is rotatably mounted on the rope wheel. The ratchet is provided with a limiting mechanism to prevent the ratchet from rotating. A first swing block and a second swing block are hinged to the rope wheel. The pawl is rotatably mounted on the rope wheel. The upper end of the first swing block and the pawl are connected by a first tension spring.

[0013] Both the end of the first throwing block away from the rope wheel shaft and the end of the second throwing block away from the rope wheel shaft are fixedly connected with impact bolts. The impact bolts can strike the switch pin on the switch, causing the switch to open.

[0014] The pulley is equipped with a speed regulating mechanism for adjusting the centrifugal speed of the first throwing block.

[0015] In the centrifugal speed limiter with a compact structure, spring-loaded and ratchet-compressed integrated according to the present invention, the limiting mechanism includes a ratchet limiting shaft, the ratchet limiting shaft is fixedly welded to one side of the ratchet, a limiting hole is opened on the mounting base, and one end of the ratchet limiting shaft is inserted into the limiting hole.

[0016] In the centrifugal speed limiter with a compact structure, spring-loaded ratchet mechanism according to the present invention, a positioning screw is fixedly connected to the mounting base, and the positioning screw is connected to the ratchet limiting shaft by a third spring.

[0017] In the compact, spring-loaded, ratchet-operated centrifugal speed limiter according to this utility model, a trigger cylinder is formed on one side of the pawl, and a triggering mechanism is provided on the mounting base. The triggering mechanism includes a push-pull electromagnet, a main trigger plate, and a secondary trigger plate. The push-pull electromagnet is fixedly mounted on the mounting base, and both the main trigger plate and the secondary trigger plate are hinged to the mounting base. The lower end of the secondary trigger plate is hinged to the lower end of the main trigger plate via a connecting rod. The top of the moving iron core in the push-pull electromagnet abuts against the lower end of the main trigger plate. An action triggering surface is provided on the secondary trigger plate, which can compress the trigger cylinder, causing the pawl to engage on the ratchet.

[0018] In the centrifugal speed limiter with a compact structure, spring-loaded and ratchet-compressed integrated according to the present invention, the speed regulating mechanism includes a fixed sleeve and a second spring. The fixed sleeve is fixedly connected to the rope wheel, and an adjusting bolt is movably inserted into the fixed sleeve. Two locking nuts are threaded on the adjusting bolt, and the two locking nuts are respectively disposed on both sides of the fixed sleeve. The lower end of the second spring is fixedly connected to the upper end of the adjusting bolt, and the upper end of the second spring is connected to the first centrifugal block.

[0019] In the compact, tension-spring type integrated ratchet centrifugal speed limiter according to the present invention, the first and second centrifugal blocks are hinged together by a transmission rod.

[0020] In the compact centrifugal speed limiter with integrated tension spring and ratchet mechanism according to this utility model, a protective cover is fixedly installed on the mounting base.

[0021] In the compact, tension-spring type ratchet integrated centrifugal speed limiter according to the present invention, the mounting base is provided with a first guide hole and a second guide hole respectively, the lower end of the main trigger plate is fixedly connected to a first guide block, the lower end of the auxiliary trigger plate is fixedly connected to a second guide block, the first guide block is slidably disposed in the second guide hole, and the second guide block is slidably disposed in the first guide hole.

[0022] This utility model has at least the following beneficial effects:

[0023] 1. Install the first tension spring on the pawl onto the first sling block, and eliminate the pressure pawl and torsion spring mechanism of similar speed limiters. When the speed limiter is running normally, the first sling block and the pawl rotate synchronously, and the pawl has no relative sliding friction, which increases service life and reduces maintenance requirements.

[0024] 2. Since the pressure claw and torsion spring are eliminated, there is no torsion spring acting as a reverse force when the first and second swing blocks are running, resulting in a more stable operating speed;

[0025] 3. When a manual triggering test is required, the trigger cylinder block set on the pawl rotates the main trigger plate, which in turn drives the triggering action on the secondary trigger plate to move towards the direction of the rope wheel shaft through the connecting rod, directly squeezing the rotating trigger cylinder block. Mechanical and electrical actions can be triggered without the need to link other parts.

[0026] 4. The trigger point is a two-point trigger, which can be used to prevent the car from moving unexpectedly;

[0027] 5. After the mechanical action is completed, the speed limiter pulley can be reversed simply by lifting the car, and the mechanical action can be reset.

[0028] 6. The spring used for adjusting the speed has been changed from a compression spring to a tension spring, eliminating the need for guide bolts, spring seats, square pins, etc., reducing contact between the adjusting spring and other parts, and increasing the stability of the speed limiter;

[0029] 7. The ratchet limiting shaft has been changed to be welded and integrated with the ratchet, and its outer diameter has been thickened to enhance its shear resistance. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0031] Figure 1 This is a schematic diagram of the structure of this utility model;

[0032] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0033] Figure 3 This is one of the partial structural schematic diagrams of this utility model;

[0034] Figure 4 This is the second partial structural schematic diagram of this utility model.

[0035] Explanation of icon numbers:

[0036] 1. Mounting base; 101. Protective cover; 102. Limiting hole; 103. Third tension spring; 104. Positioning screw; 105. First guide hole; 106. Second guide hole; 2. Switch; 3. Rope wheel; 301. Fixing sleeve; 302. Adjusting bolt; 303. Locking nut; 304. Second tension spring; 4. Ratchet; 401. Ratchet limiting shaft; 5. Rope wheel shaft; 6. First throwing block; 7. Second throwing block; 8. Impact bolt; 9. Pawl; 901. First tension spring; 902. Trigger cylinder block; 10. Transmission rod; 11. Push-pull electromagnet; 1101. Moving iron core; 12. Main trigger plate; 1201. First guide block; 1202. Reset rod; 1203. Fourth tension spring; 1204. Positioning rod; 13. Connecting rod; 14. Secondary trigger plate; 1401. Second guide; 1402. Trigger action surface. Detailed Implementation

[0037] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0038] Please refer to Figures 1 to 4 As shown, an embodiment of this utility model provides a compact, spring-loaded, ratchet-integrated centrifugal speed limiter, including a mounting base 1 and a switch 2. A rope wheel 3 is rotatably mounted on the inner side of the mounting base 1 via a rope wheel shaft 5, and a ratchet mechanism is mounted on the inner side of the mounting base 1.

[0039] The ratchet mechanism includes a ratchet 4 and a pawl 9. The ratchet 4 is rotatably mounted on the rope wheel 3. The ratchet 4 is provided with a limiting mechanism to prevent the ratchet 4 from rotating. In this embodiment, the limiting mechanism includes a ratchet limiting shaft 401, which is fixedly welded to one side of the ratchet 4. A limiting hole 102 is provided on the mounting base 1. One end of the ratchet limiting shaft 401 is inserted into the limiting hole 102. A positioning screw 104 is fixedly connected to the mounting base 1. The positioning screw 104 and the ratchet limiting shaft 401 are connected by a third tension spring 103. A first swing block 6 and a second swing block 7 are hinged on the rope wheel 3. In this embodiment, the first swing block 6 and the second swing block 7 are hinged by a transmission rod 10. The pawl 9 is rotatably mounted on the rope wheel 3. The upper end of the first swing block 6 and the pawl 9 are connected by a first tension spring 901.

[0040] Among them, the end of the first throwing block 6 away from the rope wheel shaft 5 and the end of the second throwing block 7 away from the rope wheel shaft 5 are both fixedly connected with impact bolts 8. The impact bolts 8 can strike the switch pin on the switch 2, causing the switch 2 to disconnect.

[0041] By using the impact bolt 8 in conjunction with the first swing block 6 and the second swing block 7, when the elevator is running at overspeed, the switch needle is knocked off by the impact bolt 8, cutting off the power and causing the traction machine and other components to activate protection and stop the car. If the car continues to fall after the switch 2 is de-energized, the pawl 9 will be driven by the centrifugal force of the first swing block 6 and get stuck on the ratchet 4, forcibly stopping the car. When it is necessary to reset, simply rotate the rope wheel 3, and at the same time, the first tension spring 901 will provide tension to the pawl 9, so that the pawl 9 will automatically release from the ratchet 4.

[0042] In this embodiment, the rope wheel 3 is provided with a speed regulating mechanism for adjusting the centrifugal speed of the first throwing block 6. The speed regulating mechanism includes a fixed sleeve 301 and a second tension spring 304. The fixed sleeve 301 is fixedly connected to the rope wheel 3. An adjusting bolt 302 is movably inserted into the fixed sleeve 301. Two locking nuts 303 are threaded on the adjusting bolt 302. The two locking nuts 303 are respectively located on both sides of the fixed sleeve 301. The lower end of the second tension spring 304 is fixedly connected to the upper end of the adjusting bolt 302, and the upper end of the second tension spring 304 is connected to the first throwing block 6.

[0043] By adjusting the adjusting bolt 302 downwards, the tension of the second tension spring 304 is increased, which in turn makes the first throwing block 6 require a greater centrifugal force to be thrown outwards.

[0044] In this embodiment, a triggering cylindrical block 902 is formed on one side of the pawl 9, and a triggering mechanism is provided on the mounting base 1. The triggering mechanism includes a push-pull electromagnet 11, a main triggering plate 12, and a secondary triggering plate 14. The push-pull electromagnet 11 is fixedly installed on the mounting base 1. The main triggering plate 12 and the secondary triggering plate 14 are both hinged on the mounting base 1. The lower end of the secondary triggering plate 14 is hinged to the lower end of the main triggering plate 12 through a connecting rod 13. The top of the moving iron core 1101 in the push-pull electromagnet 11 abuts against the lower end of the main triggering plate 12. An action triggering surface 1402 is provided on the secondary triggering plate 14. The action triggering surface 1402 can squeeze the triggering cylindrical block 902, so that the pawl 9 is stuck on the ratchet 4.

[0045] By adopting the above technical solution, the rope wheel can be kept from rotating when the elevator is not overspeeding or stopped, thereby triggering the safety gear. This tests whether the entire linkage mechanism of the speed governor and the safety gear can work normally. In use, the electromagnet shaft 1101 in the electrically triggered push-pull electromagnet 11 pops out and squeezes the lower end of the main trigger plate 12. This causes the main trigger plate 12 to drive the trigger action surface 1402 on the auxiliary trigger plate 14 to move closer to the rope wheel shaft 5 through the connecting rod 13. When the rope wheel 3 rotates with the pawl 9, the rotating trigger cylinder block 902 is guided into the trigger action surface 1402, so that the pawl 9 is stuck on the ratchet 4, keeping the rope wheel from rotating, thereby triggering the safety gear. This tests whether the entire linkage mechanism of the speed governor and the safety gear can work normally.

[0046] In this embodiment, in order to ensure that the secondary trigger plate 14 can move smoothly, the mounting base 1 is provided with a first guide hole 105 and a second guide hole 106 respectively. The lower end of the main trigger plate 12 is fixedly connected to a first guide block 1201, and the lower end of the secondary trigger plate 14 is fixedly connected to a second guide block 1401. The first guide block 1201 is slidably disposed in the second guide hole 106, and the second guide block 1401 is slidably disposed in the first guide hole 105.

[0047] To ensure that the main trigger plate 12 can actively reset after the moving iron core 1101 is reset downwards, a reset rod 1202 is fixedly connected to the main trigger plate 12, and a positioning rod 1204 is fixedly connected to the mounting base 1. The positioning rod 1204 and the reset rod 1202 are connected by a fourth tension spring 1203.

[0048] In this embodiment, to prevent dust and foreign objects from being drawn into the limiter, a protective cover 101 is fixedly installed on the mounting base 1. In this embodiment, the switch 2 is installed on the protective cover 101.

[0049] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A compact, spring-loaded, ratchet-compression integrated centrifugal speed limiter, characterized in that: It includes a mounting base (1) and a switch (2). A rope wheel (3) is rotatably mounted on the inner side of the mounting base (1) via a rope wheel shaft (5). A ratchet mechanism is mounted on the inner side of the mounting base (1). The ratchet mechanism includes a ratchet (4) and a pawl (9). The ratchet (4) is rotatably mounted on the rope wheel (3). A limiting mechanism is provided on the ratchet (4) to prevent the ratchet (4) from rotating. A first swing block (6) and a second swing block (7) are hinged on the rope wheel (3). The pawl (9) is rotatably mounted on the rope wheel (3). The first swing block (6) and the upper end of the pawl (9) are connected by a first tension spring (901). The first throwing block (6) and the second throwing block (7) are both fixedly connected with impact bolts (8) at the ends away from the rope wheel shaft (5) and the ends away from the rope wheel shaft (5). The impact bolts (8) can strike the switch pin on the switch (2) to make the switch (2) open. The rope wheel (3) is provided with a speed regulating mechanism for adjusting the centrifugal speed of the first swing block (6).

2. The compact, tension-spring type integrated ratchet centrifugal speed limiter according to claim 1, characterized in that: The limiting mechanism includes a ratchet limiting shaft (401), which is fixedly welded to one side of the ratchet (4). A limiting hole (102) is provided on the mounting base (1), and one end of the ratchet limiting shaft (401) is inserted into the limiting hole (102).

3. The compact, spring-loaded, ratchet-integrated centrifugal speed limiter according to claim 2, characterized in that: A positioning screw (104) is fixedly connected to the mounting base (1), and the positioning screw (104) is connected to the ratchet limiting shaft (401) by a third tension spring (103).

4. The compact, spring-loaded, ratchet-integrated centrifugal speed limiter according to claim 3, characterized in that: A trigger cylinder block (902) is formed on one side of the pawl (9). A triggering mechanism is provided on the mounting base (1). The triggering mechanism includes a push-pull electromagnet (11), a main trigger plate (12), and a secondary trigger plate (14). The push-pull electromagnet (11) is fixedly installed on the mounting base (1). The main trigger plate (12) and the secondary trigger plate (14) are both hinged on the mounting base (1). The lower end of the secondary trigger plate (14) is hinged to the lower end of the main trigger plate (12) through a connecting rod (13). The top of the moving iron core (1101) in the push-pull electromagnet (11) abuts against the lower end of the main trigger plate (12). An action triggering surface (1402) is provided on the secondary trigger plate (14). The action triggering surface (1402) can squeeze the trigger cylinder block (902), so that the pawl (9) is stuck on the ratchet (4).

5. The compact, spring-loaded, ratchet-integrated centrifugal speed limiter according to claim 4, characterized in that: The speed regulating mechanism includes a fixed sleeve (301) and a second tension spring (304). The fixed sleeve (301) is fixedly connected to the rope wheel (3). An adjusting bolt (302) is movably inserted into the fixed sleeve (301). Two locking nuts (303) are threaded on the adjusting bolt (302). The two locking nuts (303) are respectively located on both sides of the fixed sleeve (301). The lower end of the second tension spring (304) is fixedly connected to the upper end of the adjusting bolt (302). The upper end of the second tension spring (304) is connected to the first swing block (6).

6. The compact, spring-loaded, ratchet-integrated centrifugal speed limiter according to claim 5, characterized in that: The first throwing block (6) and the second throwing block (7) are hinged together by a transmission rod (10).

7. The compact, tension-spring type integrated ratchet centrifugal speed limiter according to claim 6, characterized in that: A protective cover (101) is fixedly installed on the mounting base (1).

8. The compact, tension-spring type integrated ratchet centrifugal speed limiter according to claim 7, characterized in that: The mounting base (1) is provided with a first guide hole (105) and a second guide hole (106). The lower end of the main trigger plate (12) is fixedly connected to a first guide block (1201), and the lower end of the auxiliary trigger plate (14) is fixedly connected to a second guide block (1401). The first guide block (1201) is slidably disposed in the second guide hole (106), and the second guide block (1401) is slidably disposed in the first guide hole (105).

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