Speed ​​limiter and elevator

Abstract

The present invention belongs to the technical field of elevator components, and specifically relates to a speed limiter and an elevator. The speed limiter includes a wheel shaft and a rope pulley rotatably mounted on the wheel shaft, and also includes a centrifugal mechanism arranged on the rope pulley. The centrifugal mechanism includes two centrifugal throw blocks and a connecting rod. The two centrifugal throw blocks can be rotatably mounted on the rope pulley and are respectively connected to the rotating pairs at both ends of the connecting rod; the throw-out side of one of the centrifugal throw blocks is rotatably connected with a brake member, and correspondingly, the wheel shaft is coaxially provided with a brake disc; when the speed limiter is in an overspeed state, the centrifugal throw block links the brake member to move to fit the brake disc for braking cooperation. In the speed limiter of the present invention, under the action of centrifugal force, the brake member is directly pulled by the centrifugal throw block, and the brake member is self-locked between the brake disc and the rope pulley, so that the rope pulley stops rotating and is pulled. When overspeed detection occurs, it has the characteristics of instant triggering and rapid response, thereby improving the response time of the safety protection device braking.

Description

Technical Field

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

[0002] According to the requirements of the new elevator standard, in order to ensure that the speed limiter is activated before the dangerous speed is reached, the maximum distance between the speed limiter action points that trigger the progressive safety clamp corresponding to the movement of the speed limiter rope should not be greater than 250mm. The maximum distance between the speed limiter action points that trigger the instantaneous safety clamp corresponding to the movement of the speed limiter rope should not be greater than 100mm. When some existing speed limiters are triggered, the centrifugal block cooperates with the brake step brake, that is, several braking points are set after the centrifugal block is triggered, which has the characteristics of long capture time and slow response, and cannot achieve instant triggering; moreover, when the brake is triggered, the centrifugal block and the bracket bear a large impact force, and the overall structural strength requirements are high to ensure stability, and it is necessary to design a limiter on the centrifugal block to ensure the safety of the centrifugal mechanism. In addition, when three brake steps are set on the bracket as triggering points, the processing and manufacturing requirements are high;

[0003] In the prior art, when the trigger point is increased in order to improve the response, it cannot be triggered as the speed increases, and high speed is difficult to achieve. Summary of the invention

[0004] Based on the above-mentioned shortcomings and deficiencies in the prior art, one of the objects of the present invention is to at least solve one or more of the above-mentioned problems in the prior art. In other words, one of the objects of the present invention is to provide a speed limiter and an elevator that meet one or more of the above-mentioned requirements.

[0005] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0006] A speed limiter, comprising a wheel shaft and a rope wheel rotatably mounted on the wheel shaft, and also comprising a centrifugal mechanism arranged on the rope wheel, wherein the centrifugal mechanism comprises two centrifugal throwing blocks and a connecting rod, wherein the two centrifugal throwing blocks are rotatably mounted on the rope wheel and are respectively connected to the rotating pairs at both ends of the connecting rod; a brake member is rotatably connected to the throwing side of one of the centrifugal throwing blocks, and correspondingly, a brake disc is coaxially arranged on the wheel shaft;

[0007] When the speed limiter is in an overspeed state, the centrifugal block drives the brake member to move to fit the brake disc for braking cooperation.

[0008] As a preferred solution, the rope pulley is provided with a guide member, and the guide member is used to guide and lock the movement of the braking member.

[0009] As a preferred solution, the guide member is a guide column or a guide block, and the brake member has a limiting hole; the guide member movably cooperates with the limiting hole to limit the reset stroke of the centrifugal throw block.

[0010] As a preferred solution, the braking surface of the braking member is an inclined surface or a curved surface.

[0011] As a preferred solution, the braking surface of the braking member has a knurling pattern.

[0012] As a preferred solution, the outer peripheral surface of the brake disc is a braking surface for braking cooperation with the braking surface of the brake member; the braking surface of the brake disc has a knurled pattern.

[0013] As a preferred solution, the rope pulley comprises a rope pulley outer ring and a rope pulley inner ring which are coaxially mounted, and a friction plate is provided between the rope pulley outer ring and the rope pulley inner ring.

[0014] As a preferred solution, the inner ring of the rope pulley includes a main wheel ring and a friction adjustment ring coaxially fixedly installed on the main wheel ring, the outer edge of the main wheel ring and the outer edge of the friction adjustment ring form an installation groove, the inner ring of the outer ring of the rope pulley is embedded in the installation groove, and the two sides of the inner ring of the outer ring of the rope pulley are frictionally matched with the main wheel ring and the friction adjustment ring through friction plates.

[0015] As a preferred solution, a speed regulating assembly is correspondingly provided on one of the centrifugal throw blocks for adjusting the speed limit of the speed limiter and resetting the speed limiter.

[0016] The present invention also provides an elevator, characterized in that it adopts the speed limiter described in any of the above solutions.

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

[0018] The speed limiter of the present invention has the characteristics of instant triggering and rapid response when overspeed detection occurs, thereby improving the response time of the braking of the safety protection device.

[0019] The elevator of the present invention has a higher safety in overspeed braking because the speed limiter has a long capture response time and a fast response. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 1 is a schematic diagram of the main structure of the speed limiter according to Embodiment 1 of the present invention;

[0021] Figure 2 is a rear view structural schematic diagram of a speed limiter according to Embodiment 1 of the present invention;

[0022] Figure 3 yes Figure 2 AA section view in the figure;

[0023] Figure 4 yes Figure 3 A magnified view of part I in FIG.

[0024] Figure 5 is a schematic structural diagram of the axle of Embodiment 1 of the present invention;

[0025] Figure 6 1 is a schematic diagram of the structure of the speed governor of Example 1 of the present invention (the outer ring of the rope pulley is omitted);

[0026] Figure 7 is a schematic structural diagram of a brake pad according to Embodiment 1 of the present invention;

[0027] Figure 8 It is a schematic structural diagram of the speed limiter of Example 1 of the present invention. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the embodiments of the present invention, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other accompanying drawings and other implementation methods can be obtained based on these accompanying drawings without creative work.

[0029] Embodiment 1:

[0030] like Figure 1-8 As shown, the speed limiter of this embodiment includes a wheel shaft 1, a rope pulley 2, a centrifugal mechanism and a brake block 3. The rope pulley 2 is coaxially mounted on the wheel shaft 1 through a bearing 4 to realize the rotation of the rope pulley; the brake block 3 and the centrifugal mechanism are mounted on the rope pulley 2.

[0031] Specifically, the wheel shaft 1 includes a limiting section 1a, a bearing installation section 1b, a shoulder section 1c, a brake disc 10 and an extended installation section 1e in sequence along its axial direction. The limiting section 1a has a limiting groove for installing a shaft elastic retaining ring so as to limit the bearing 4 installed on the bearing installation section 1b. The outer diameter of the shoulder section 1c is larger than the outer diameter of the bearing installation section 1b, and the shaft elastic retaining ring is used to limit the two sides of the bearing 4 respectively, thereby limiting the axial movement of the rope wheel 2. The brake disc 10 protrudes from the rope wheel 2 so as to cooperate with the brake block 3 for braking. The extended installation section is used for the installation of the wheel shaft 1.

[0032] The rope sheave 2 comprises a coaxially mounted rope sheave outer ring 2a and a rope sheave inner ring 2b, and a friction plate 5 is provided between the rope sheave outer ring 2a and the rope sheave inner ring 2b to generate a friction torque between the rope sheave outer ring 2a and the rope sheave inner ring 2b under the action of a spring force, thereby generating a stable lifting force for pulling the steel wire rope.

[0033] In order to facilitate the adjustment of the pulling force of the wire rope, the inner ring 2b of the rope pulley in this embodiment includes a main wheel ring 2-1 and a friction adjustment ring 2-2 coaxially fixedly installed on the main wheel ring, the friction adjustment ring 2-1 and the centrifugal mechanism are respectively located on both sides of the main wheel ring 2-1, and an adjustment elastic element can be arranged between the friction adjustment ring 2-2 and the main wheel ring 2-1 to preset the positive pressure; the outer edge of the main wheel ring 2-1 and the outer edge of the friction adjustment ring 2-2 form an installation groove, the inner ring 2-3 of the rope pulley outer ring 2a is embedded in the installation groove, and the two sides of the inner ring 2-3 of the rope pulley outer ring are respectively friction-matched with the main wheel ring 2-1 and the friction adjustment ring 2-2 through friction plates 5, and there are several friction plates 5, which are evenly distributed along the circumference of the installation groove.

[0034] The centrifugal mechanism of this embodiment includes a left centrifugal throw block 6-1, a right centrifugal throw block 6-2 and a connecting rod 7. The left centrifugal throw block 6-1 and the right centrifugal throw block 6-2 can be rotatably installed on the main wheel rim 2-1 of the rope pulley, and are respectively connected to the rotating pairs at both ends of the connecting rod 7 to realize the linkage of the left centrifugal throw block 6-1 and the right centrifugal throw block 6-2; wherein, the throw-out side of the right centrifugal throw block 6-2 is rotatably connected to the brake block 3.

[0035] In addition, the main wheel 2-1 of the rope wheel is fixed with a guide column 8, which is used to guide the movement of the brake member. The brake block 3 has a limiting hole 3a, and the guide column 8 is movably matched with the limiting hole 3a to limit the reset stroke of the two centrifugal blocks.

[0036] The braking surface of the brake block 3 of this embodiment is an arc surface, and the braking surface of the brake block has a knurling pattern 30 to improve the braking friction coefficient.

[0037] The outer peripheral surface of the brake disc 10 of this embodiment is a braking surface, which is used for braking cooperation with the braking surface of the brake pad; the braking surface of the brake disc 10 also has a knurling pattern 100 to further improve the braking friction coefficient.

[0038] When the speed limiter is in an overspeed state, the two centrifugal throw blocks link the brake blocks to move to fit the brake disc and self-lock, realizing rope pulley braking, which is triggered instantly first, reduces delay and improves response, avoids affecting the braking response time due to triggering through the brake step, and at the same time, the limit design of the centrifugal throw block's own structure and the increase of impact strength can be omitted, thereby greatly reducing the manufacturing difficulty.

[0039] The right centrifugal block of this embodiment is provided with a corresponding speed regulating assembly, which is used to adjust the speed limit of the speed limiter and reset the speed limiter. Specifically, the speed regulating assembly is installed on the main wheel 2-1 of the rope pulley, including a speed regulating spring 9-1, an adjusting rod 9-2 and a limiting seat 9-3. The right end of the speed regulating spring 9-1 is connected to a position on the right centrifugal block away from its rotation center (i.e., the lowermost side), and the left end of the speed regulating spring 9-1 is connected to the right end of the adjusting rod 9-2. The adjusting rod 9-2 is telescopically matched with the limiting seat 9-3 to adjust the elongation of the speed regulating spring 9-1, thereby controlling the throwing out of the right centrifugal block, and the speed limit of the speed limiter can be controlled; when the adjusting rod 9-2 moves to the target position, the adjusting rod 9-2 is fixed to the limiting seat 9-3, and the specific fixing method is not repeated here, for example, it is fixed by a fixing pin. In addition, any existing structure that can adjust the elongation of the speed regulating spring is acceptable, and is not limited to the above-mentioned adjustment method.

[0040] This embodiment also provides an elevator, which adopts the speed limiter of this embodiment and has better overspeed braking safety.

[0041] Embodiment 2:

[0042] The speed limiter of this embodiment is different from that of embodiment 1 in that:

[0043] The braking surface of the brake block is an inclined surface, or the brake block is a wedge block structure, and the guide column is replaced by a guide structure of the wedge block, as long as the brake block can be brought close to the brake disc and braked in close contact;

[0044] For other structures, please refer to Example 1.

[0045] The elevator of this embodiment adopts the speed governor of this embodiment.

[0046] Embodiment 3:

[0047] The speed limiter of this embodiment is different from that of Embodiment 1 in that:

[0048] The brake block and speed regulating assembly can also be installed on the left centrifugal block to achieve structural diversification;

[0049] For other structures, please refer to Example 1.

[0050] The elevator of this embodiment adopts the speed governor of this embodiment.

[0051] Embodiment 4:

[0052] The speed limiter of this embodiment is different from that of Embodiment 1 in that:

[0053] The outer ring of the rope wheel and the inner ring of the rope wheel are an integrated structure, and the friction force is generated by the wire rope and the rope groove instead of using a friction plate and a spring adjustment structure. The friction force can also be generated by an external brake wire rope.

[0054] For other structures, please refer to Example 1.

[0055] The elevator of this embodiment adopts the speed governor of this embodiment.

[0056] It should be noted that the above embodiments can be freely combined as needed. The above description is only a detailed description of the preferred embodiments and principles of the present invention. For ordinary technicians in this field, according to the ideas provided by the present invention, there will be changes in the specific implementation methods, and these changes should also be regarded as the protection scope of the present invention.

Claims

1. A speed governor, comprising a wheel shaft and a rope pulley rotatably mounted on the wheel shaft, and also comprising a centrifugal mechanism arranged on the rope pulley, characterized in that: The centrifugal mechanism comprises two centrifugal throwing blocks and a connecting rod. The two centrifugal throwing blocks are rotatably mounted on the rope wheel and are respectively connected to the rotating pairs at both ends of the connecting rod. A brake member is rotatably connected to the throwing side of one centrifugal throwing block, and correspondingly, a brake disc is coaxially arranged on the wheel shaft. When the speed limiter is in overspeed state, the centrifugal block links the brake part to move to fit the brake disc for braking cooperation; The rope pulley is provided with a guide member, which is used to guide and lock the movement of the brake member; The guide member is a guide column or a guide block, and the brake member has a limiting hole; the guide member is movably matched with the limiting hole to limit the reset stroke of the centrifugal throw block.

2. A speed limiter according to claim 1, characterized in that: The braking surface of the braking member is an inclined surface or a curved surface.

3. A speed limiter according to claim 2, characterized in that: The braking surface of the braking member has a knurling pattern.

4. A speed limiter according to claim 1, characterized in that: The outer peripheral surface of the brake disc is a braking surface, which is used for braking cooperation with the braking surface of the brake member; the braking surface of the brake disc has a knurling pattern.

5. A speed limiter according to claim 1, characterized in that: The rope wheel comprises a rope wheel outer ring and a rope wheel inner ring which are coaxially installed, and a friction plate is arranged between the rope wheel outer ring and the rope wheel inner ring.

6. A speed limiter according to claim 5, characterized in that: The inner ring of the rope pulley includes a main wheel ring and a friction adjustment ring coaxially fixedly installed on the main wheel ring. The outer edge of the main wheel ring and the outer edge of the friction adjustment ring form a mounting groove. The inner ring of the outer ring of the rope pulley is embedded in the mounting groove, and the two sides of the inner ring of the outer ring of the rope pulley are frictionally matched with the main wheel ring and the friction adjustment ring through friction plates.

7. A speed limiter according to claim 1, characterized in that: One of the centrifugal throw blocks is correspondingly provided with a speed regulating assembly for adjusting the speed limit of the speed limiter and resetting the speed limiter.

8. An elevator, characterized in that: A speed limiter according to any one of claims 1 to 7 is used.

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