Elevator compensation rope tensioning wheel anti-bouncing device and elevator safety system

Abstract

The invention provides an elevator compensation rope tensioning wheel anti-bouncing device and an elevator safety system, and relates to the technical field of elevator safety. The anti-bouncing device for the elevator compensation rope tensioning wheel comprises a floating seat, a cam group and a sliding rail, the cam group is mounted on the floating seat and is in sliding fit with the sliding rail; the sliding rail is clamped by the cam group along with the sliding of the cam group relative to the sliding rail. According to the anti-bouncing device for the elevator compensation rope tensioning wheel, locking and limiting can be achieved in the extending direction of the sliding rail, clamping stagnation between the anti-bouncing device and the sliding rail can be avoided through rotation of the cam set and the arc face, and therefore the reliability of the anti-bouncing effect is improved.

Description

Technical Field

[0001] This invention relates to the field of elevator safety technology, and in particular to an elevator compensating rope tension wheel anti-jump device and an elevator safety system. Background Technology

[0002] The working principle of the elevator compensating rope tensioner anti-jump device is to install a limiting device above the tensioner, which has a built-in wedge structure. When the tensioner jumps upward and the displacement exceeds a preset threshold, the wedge clamps onto the guide rail, thus limiting the compensating rope tensioner to the pit position. However, this device has the following technical defects: First, during the fall after the tensioner completes its upward jump, the wedge structure only has a one-way limiting function and cannot provide effective buffering, causing the compensating wire rope and car to bear impact loads; second, the wedge self-locking mechanism has the risk of jamming, and the reset operation is difficult, seriously affecting the normal use, maintenance and debugging of the equipment. Summary of the Invention

[0003] The purpose of this invention is to provide an elevator compensating rope tension wheel anti-jump device and an elevator safety system to alleviate the technical problems of existing tension wheel anti-jump devices being prone to jamming and unable to prevent secondary impacts.

[0004] In a first aspect, the elevator compensating rope tension wheel anti-jump device provided by the present invention includes: a floating seat, a cam assembly, and a slide rail; The cam assembly is mounted on the floating seat, and the cam assembly is slidably engaged with the slide rail; As the cam assembly slides relative to the slide rail, the cam assembly clamps the slide rail.

[0005] In conjunction with the first aspect, the present invention provides a first possible implementation of the first aspect, wherein the cam assembly includes: a first cam and a second cam; The slide rail is located between the first cam and the second cam; At least one of the first cam and the second cam is provided with a first protrusion that protrudes toward one end of the slide rail.

[0006] In conjunction with the first possible implementation of the first aspect, the present invention provides a second possible implementation of the first aspect, wherein at least one of the first cam and the second cam is provided with a second protrusion that protrudes toward the other end of the slide rail.

[0007] In conjunction with the first possible implementation of the first aspect, the present invention provides a third possible implementation of the first aspect, wherein the cam group further includes: a third cam and a fourth cam; The first cam and the third cam are spaced apart along the slide rail, and the second cam and the fourth cam are spaced apart along the slide rail, with the slide rail located between the third cam and the fourth cam; At least one of the third cam and the fourth cam is provided with a second protrusion that protrudes toward the other end of the slide rail.

[0008] In conjunction with the third possible implementation of the first aspect, the present invention provides a fourth possible implementation of the first aspect, wherein the elevator compensating rope tensioning wheel anti-jump device further includes a stop base, the stop base being used to connect the compensating rope tensioning device; The stop base is provided with a first side beam and a second side beam; The slide rail is located between the first side beam and the second side beam, and both the first side beam and the second side beam are parallel to the slide rail; When the compensating rope tensioning device jumps, the first cam and the third cam roll and rub along the first side beam, and the second cam and the fourth cam roll and rub along the second side beam.

[0009] In conjunction with the fourth possible implementation of the first aspect, the present invention provides a fifth possible implementation of the first aspect, wherein both the first side beam and the second side beam are provided with rough inner surfaces.

[0010] In conjunction with the first aspect, the present invention provides a sixth possible implementation of the first aspect, wherein a clamping member is mounted on the floating seat and the clamping member is clamped on the slide rail.

[0011] In conjunction with the sixth possible implementation of the first aspect, the present invention provides a seventh possible implementation of the first aspect, wherein the clamping member includes: a first clamping block, a second clamping block, a threaded member, and a compression spring; The first clamping block and the second clamping block are arranged opposite each other and are located on both sides of the slide rail; The threaded component passes through the first clamping block and the second clamping block, and is locked by a nut; The compression spring is sleeved on the threaded part and compressed between the first clamping block and the nut to apply an elastic preload to the first clamping block and the second clamping block.

[0012] In conjunction with the seventh possible implementation of the first aspect, the present invention provides an eighth possible implementation of the first aspect, wherein the stiffness of the compression spring is configured such that the clamping force provided by the clamping member is sufficient to resist the influence of the anti-jump device's own weight and external vibrations, but less than the maximum frictional resistance generated by the slide rail and the cam assembly during the self-locking process.

[0013] Secondly, the elevator safety system provided by the present invention is equipped with the elevator compensating rope tensioner anti-jump device described in the first aspect.

[0014] The embodiments of the present invention bring the following beneficial effects: the cam assembly is installed on the floating seat and the cam assembly slides in conjunction with the slide rail. As the cam assembly slides relative to the slide rail, the cam assembly clamps the slide rail. This not only achieves stop and limit in the extension direction of the slide rail, but also uses the rotation of the cam assembly and the arc surface to avoid jamming between the anti-jump device and the slide rail, thereby improving the reliability of the anti-jumping effect.

[0015] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the elevator compensating rope tensioner anti-jump device in its initial state, as provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the elevator compensating rope tension wheel anti-jump device provided in an embodiment of the present invention when the elevator experiences an emergency stop or impact buffering. Figure 3 This is a schematic diagram of the elevator compensating rope tension wheel anti-jump device provided in an embodiment of the present invention when it jumps upwards; Figure 4 This is a schematic diagram of the elevator compensating rope tension wheel anti-jump device provided in an embodiment of the present invention during an impact.

[0018] Icons: 100-Floating seat; 200-Cam assembly; 201-First protrusion; 202-Second protrusion; 210-First cam; 220-Second cam; 230-Third cam; 240-Fourth cam; 300-Slide rail; 400-Stop base; 410-First side beam; 420-Second side beam; 500-Compensating rope tensioning device; 600-Clamping component; 610-First clamping block; 620-Second clamping block; 630-Threaded component; 640-Compression spring. Detailed Implementation

[0019] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not 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 limitations on the invention. Furthermore, the terms "first," "second," and "third" are used only to describe differences in name and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities in the International System of Units (SI), or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] like Figure 1 and Figure 2 As shown, the elevator compensating rope tension wheel anti-jump device provided in this embodiment of the invention includes: a floating seat 100, a cam group 200 and a slide rail 300; the cam group 200 is installed on the floating seat 100 and the cam group 200 is slidably engaged with the slide rail 300; as the cam group 200 slides relative to the slide rail 300, the cam group 200 clamps the slide rail 300.

[0023] Specifically, the slide rail 300 serves as a guide component for the compensating rope tensioning device 500. It is typically fixedly installed at the bottom of the wellbore, perpendicular to the ground, and extends in the same direction as the compensating rope's movement. The floating seat 100 is located on one side of the slide rail 300, serving as the mounting base for functional components such as the cam assembly 200. The cam assembly 200 is mounted on the floating seat 100 and forms a sliding fit with the slide rail 300. The cam assembly 200 is rotatably connected to the floating seat 100 via a rotating shaft, and its main body has at least one arc-shaped clamping surface that matches the outer surface of the slide rail 300. This arc-shaped clamping surface faces the slide rail 300, and when the cam assembly 200 undergoes relative displacement with respect to the slide rail 300, it can adaptively rotate under frictional force. Under normal operating conditions, a certain gap or slight preload contact is maintained between the slide rail 300 and the cam assembly 200, allowing the cam assembly 200 to slide smoothly. However, when the elevator experiences severe vibrations, instantaneous impact loads, or sudden rebound of the tensioning wheel during operation, causing the compensating rope tensioning device 500 to attempt to deviate from its normal travel range (i.e., exhibiting a tendency to jump), as the cam assembly 200 rotates, its arc-shaped clamping surface gradually applies radial pressure to the slide rail 300, thereby achieving dynamic clamping of the compensating rope tensioning device 500. This clamping action not only limits the excessive displacement of the compensating rope tensioning device 500 along the extension direction of the slide rail 300 (i.e., restricts jumping), but also avoids the jamming and seizing phenomena that are easily caused by rigid block structures because the clamping process is achieved through the rotation of the cam assembly 200.

[0024] In this embodiment of the invention, the cam assembly 200 includes: a first cam 210 and a second cam 220; a slide rail 300 is located between the first cam 210 and the second cam 220; at least one of the first cam 210 and the second cam 220 is provided with a first protrusion 201 protruding towards one end of the slide rail 300. The cam assembly 200 includes a first cam 210 and a second cam 220, which are arranged opposite to each other and clamped on the outer edges of both sides of the slide rail 300, so that the slide rail 300 is located between the first cam 210 and the second cam 220, forming a double-sided limiting structure. The first cam 210 and the second cam 220 are rotatably mounted inside the floating seat 100 by means of a pin or a rotating shaft, and each rotates about a rotation center axis.

[0025] At least one cam (e.g., the first cam 210) has a first protrusion 201 that protrudes towards the slide rail 300. This first protrusion 201 is preferably located at the radial outer end of the cam, has a certain curvature along the circumferential direction of the cam, and its contour surface is a smooth, continuous arc surface or an involute surface. When the cam assembly 200 slides normally up and down relative to the slide rail 300, the first protrusion 201 maintains a small gap or slight contact with the sidewall of the slide rail 300, without affecting free sliding.

[0026] In an optional embodiment, at least one of the first cam 210 and the second cam 220 may be provided with a second protrusion 202 that protrudes toward the other end of the slide rail 300. Thus, the first cam 210 and the second cam 220 can be used to stop and limit the reciprocating movement of the slide rail 300.

[0027] In a preferred embodiment, the cam assembly 200 further includes a third cam 230 and a fourth cam 240; the first cam 210 and the third cam 230 are spaced apart along the slide rail 300, and the second cam 220 and the fourth cam 240 are spaced apart along the slide rail 300, with the slide rail 300 located between the third cam 230 and the fourth cam 240; at least one of the third cam 230 and the fourth cam 240 is provided with a second protrusion 202 protruding toward the other end of the slide rail 300.

[0028] See Figure 3 When the compensating rope tensioning device 500 jumps upward relative to the slide rail 300, the second protrusion 202 located on the top of the third cam 230 and the fourth cam 240 deflects towards the slide rail 300, forming a compression on the slide rail 300. This restricts the rotation of the third cam 230 and the fourth cam 240 while simultaneously achieving a pressing and limiting effect on the slide rail 300, thereby restricting the upward jump of the compensating rope tensioning device 500 relative to the slide rail 300. (See also...) Figure 4 When the compensating rope tensioning device 500 impacts downward relative to the slide rail 300, the first protrusion 201 located at the bottom of the first cam 210 and the second cam 220 deflects towards the slide rail 300, forming a squeeze on the slide rail 300. While restricting the rotation of the first cam 210 and the second cam 220, it achieves the pressing and limiting of the slide rail 300, thereby restricting the compensating rope tensioning device 500 from impacting downward relative to the slide rail 300.

[0029] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in this embodiment, the elevator compensating rope tensioning wheel anti-jump device further includes a stop base 400, which is used to connect the compensating rope tensioning device 500. The stop base 400 is provided with a first side beam 410 and a second side beam 420. The slide rail 300 is located between the first side beam 410 and the second side beam 420, and both the first side beam 410 and the second side beam 420 are parallel to the slide rail 300. When the compensating rope tensioning device 500 jumps, the first cam 210 and the third cam 230 roll and rub along the first side beam 410, and the second cam 220 and the fourth cam 240 roll and rub along the second side beam 420.

[0030] See Figure 1 and Figure 3In the initial state, the stop base 400 is lower than the cam assembly 200, and both the first side beam 410 and the second side beam 420 are disengaged from the cam assembly 200. At this time, the compensating rope tensioning device 500 causes the stop base 400 to bounce slightly up and down along the slide rail 300; see also Figure 2 and Figure 4 When the jump exceeds the safe range, both the first side beam 410 and the second side beam 420 engage with the cam assembly 200. The compensating rope tensioning device 500 drives the stop base 400 to jump up and down, which in turn drives the cam assembly 200 to rotate through the friction of the first side beam 410 and the second side beam 420. Specifically, when the compensating rope tensioning device 500 drives the stop base 400 to jump upward, the first cam 210, the second cam 220, the third cam 230, and the fourth cam 240 are rubbed together, causing their tops to rotate towards the slide rail 300. The second protrusions 202 on the tops of the second cam 220 and the fourth cam 240 press against the slide rail 300. Thus, the upward jump of the compensating rope tensioning device 500 connected to the stop base 400 is achieved by utilizing the friction of the first side beam 410 and the second side beam 420 relative to the cam assembly 200, and the clamping force of the second cam 220 and the fourth cam 240 on the slide rail 300. Stopping; When the compensating rope tensioning device 500 drives the stop base 400 to jump downward, the first cam 210, the second cam 220, the third cam 230 and the fourth cam 240 are rubbed and their bottoms rotate toward the slide rail 300 respectively. The first protrusion 201 at the bottom of the first cam 210 and the second cam 220 presses the slide rail 300, thereby using the friction of the first side beam 410 and the second side beam 420 relative to the cam group 200, and the clamping force of the first cam 210 and the second cam 220 on the slide rail 300 to stop the compensating rope tensioning device 500 connected to the stop base 400 from jumping downward.

[0031] Furthermore, both the first side beam 410 and the second side beam 420 are provided with rough inner surfaces. These rough inner surfaces can be formed by sandblasting, laser etching, coating spraying, etc., and their surface roughness Ra value is preferably 6.3μm to 12.5μm. This design significantly improves the actual friction coefficient between the cam assembly 200 and the slide rail 300, enhances the anti-slip capability in the clamped state, and thus improves the reliability of the anti-jump braking.

[0032] In addition, the rough inner surface can be locally set in specific sections of the slide rail 300 (such as the two ends of the stroke or the impact-prone area) to selectively enhance the limiting effect and avoid the problem of increased operating resistance caused by high friction throughout the entire stroke.

[0033] Furthermore, a clamping component 600 is installed on the floating seat 100, and the clamping component 600 is clamped onto the slide rail 300. The clamping component 600 employs a spring-loaded pressure block structure, with its two ends fixed to the floating seat 100, and its middle portion abutting against the other side surface of the slide rail 300 via a roller or flat pressure head, thus forming a closed-loop clamping force system. This clamping component 600 not only helps maintain stable guidance under normal conditions but also supplements damping in dynamic operating conditions, reducing the transmission of high-frequency vibrations.

[0034] In an optional embodiment, the clamping member 600 includes: a first clamping block 610, a second clamping block 620, a threaded member 630, and a compression spring 640; the first clamping block 610 and the second clamping block 620 are disposed opposite each other and located on both sides of the slide rail 300; the threaded member 630 passes through the first clamping block 610 and the second clamping block 620 and is locked by a nut; the compression spring 640 is sleeved on the threaded member 630 and compressed between the first clamping block 610 and the nut to apply an elastic preload to the first clamping block 610 and the second clamping block 620.

[0035] In this design, a threaded component 630 (e.g., a bolt) passes sequentially through the first clamping block 610 and the second clamping block 620, and is locked in place by a nut. A compression spring 640 is sleeved around the threaded component 630, located between the first clamping block 610 and the nut, and is in a compressed state. When the nut is tightened, the compression spring 640 is pre-compressed and stores energy, applying an elastic thrust to the first clamping block 610 in the direction of the slide rail 300. Simultaneously, the reaction force pushes the second clamping block 620 to bear the force in the opposite direction, thereby allowing the two clamping blocks to jointly apply a uniform and adjustable clamping pressure to the slide rail 300.

[0036] The elastic preload structure has the following advantages: on the one hand, the compression of the spring 640 can be flexibly adjusted by adjusting the tightness of the nut, thereby controlling the clamping force and adapting to different working conditions; on the other hand, the dynamic buffering effect provided by the spring 640 can absorb high-frequency vibration energy, reduce component fatigue damage, and extend service life.

[0037] It should be noted that the stiffness of the compression spring 640 is precisely configured so that the clamping force provided by the clamping component 600 is sufficient to overcome the gravity of the anti-jump device itself and the disturbance force caused by common external vibrations, ensuring stable clamping even when stationary or at low speeds. Simultaneously, this clamping force is controlled to be less than the maximum frictional resistance generated between the slide rail 300 and the cam assembly 200 during the self-locking process. This parameter setting is crucial: it ensures that when the slide rail 300 exhibits an abnormal upward or downward tendency, the cam assembly 200 first triggers the self-locking mechanism, that is, through the wedge-tightening effect between the protrusions (first protrusion 201, second protrusion 202) and the slide rail 300, high frictional resistance is quickly established, achieving primary protection.

[0038] The elevator safety system provided in this embodiment of the invention is equipped with the elevator compensating rope tensioner anti-jump device described in the above-described embodiments. During operation, when the tensioner adjusts normally up and down due to changes in the length of the compensating rope, the anti-jump device slides accordingly, the cam assembly 200 is in an unlocked state, and the slide rail 300 maintains low-resistance sliding with the cam assembly 200. In the event of a sudden jump, rope breakage, or uncontrolled fall, a relative acceleration occurs between the slide rail 300 and the cam assembly 200, triggering the cam assembly 200 to rotate and utilize its arc surface to form a wedge-tightening effect with the slide rail 300, achieving rapid self-locking. Simultaneously, the auxiliary clamping force provided by the clamping component 600 effectively suppresses malfunctions caused by minor vibrations, improving the overall reliability and fault tolerance of the system's response.

[0039] In summary, the elevator compensating rope tensioner anti-jump device provided by this invention not only achieves reliable stopping and limiting in the extension direction of the slide rail 300, but also avoids problems such as jamming and seizing that are prone to occur in traditional rigid buckle structures through the rotation of the cam group 200 and the design of the arc contact surface, significantly improving the dynamic response performance and long-term operational stability of the anti-jump function. At the same time, the composite protection mechanism combining elastic clamping and mechanical self-locking takes into account both smooth daily operation and safety requirements in emergency situations, demonstrating good practical value and promising prospects for widespread application.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An anti-jump device for an elevator compensating rope tensioner, characterized in that, include: Floating seat (100), cam assembly (200) and slide rail (300); The cam assembly (200) is mounted on the floating seat (100), and the cam assembly (200) is slidably engaged with the slide rail (300). As the cam assembly (200) slides relative to the slide rail (300), the cam assembly (200) clamps the slide rail (300).

2. The elevator compensating rope tensioner anti-jump device according to claim 1, characterized in that, The cam assembly (200) includes: a first cam (210) and a second cam (220); The slide rail (300) is located between the first cam (210) and the second cam (220); At least one of the first cam (210) and the second cam (220) is provided with a first protrusion (201) that protrudes toward one end of the slide rail (300).

3. The elevator compensating rope tensioner anti-jump device according to claim 2, characterized in that, At least one of the first cam (210) and the second cam (220) is provided with a second protrusion (202) that protrudes toward the other end of the slide rail (300).

4. The elevator compensating rope tensioner anti-jump device according to claim 2, characterized in that, The cam assembly (200) further includes: a third cam (230) and a fourth cam (240); The first cam (210) and the third cam (230) are spaced apart along the slide rail (300), and the second cam (220) and the fourth cam (240) are spaced apart along the slide rail (300), with the slide rail (300) located between the third cam (230) and the fourth cam (240). At least one of the third cam (230) and the fourth cam (240) is provided with a second protrusion (202) that protrudes toward the other end of the slide rail (300).

5. The elevator compensating rope tensioner anti-jump device according to claim 4, characterized in that, The elevator compensating rope tensioning wheel anti-jump device also includes a stop base (400), which is used to connect the compensating rope tensioning device (500). The stop base (400) is provided with a first side beam (410) and a second side beam (420). The slide rail (300) is located between the first side beam (410) and the second side beam (420), and both the first side beam (410) and the second side beam (420) are parallel to the slide rail (300). When the compensating rope tensioning device (500) jumps, the first cam (210) and the third cam (230) roll and rub along the first side beam (410), and the second cam (220) and the fourth cam (240) roll and rub along the second side beam (420).

6. The elevator compensating rope tensioner anti-jump device according to claim 5, characterized in that, Both the first side beam (410) and the second side beam (420) are provided with rough inner surfaces.

7. The elevator compensating rope tensioner anti-jump device according to claim 1, characterized in that, A clamping member (600) is installed on the floating seat (100), and the clamping member (600) is clamped on the slide rail (300).

8. The elevator compensating rope tensioner anti-jump device according to claim 7, characterized in that, The clamping member (600) includes: a first clamping block (610), a second clamping block (620), a threaded member (630), and a compression spring (640). The first clamping block (610) and the second clamping block (620) are arranged opposite to each other and are located on both sides of the slide rail (300); The threaded component (630) passes through the first clamping block (610) and the second clamping block (620) and is locked by a nut; The compression spring (640) is sleeved on the threaded part (630) and compressed between the first clamping block (610) and the nut to apply an elastic preload to the first clamping block (610) and the second clamping block (620).

9. The elevator compensating rope tensioner anti-jump device according to claim 8, characterized in that, The stiffness of the compression spring (640) is configured such that the clamping force provided by the clamping member (600) is sufficient to resist the influence of the anti-jump device's own weight and external vibration, but less than the maximum frictional resistance generated by the slide rail (300) and the cam assembly (200) during the self-locking process.

10. An elevator safety system, characterized in that, The elevator safety system is equipped with the elevator compensating rope tension wheel anti-jump device as described in any one of claims 1-9.

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