A two-way lifting mechanism

Abstract

The present invention belongs to the technical field of elevator components, and specifically relates to a bidirectional lifting mechanism, comprising a pair of lifting assemblies, the lifting assemblies comprising a base, a bidirectional lifting arm, a swing arm and a safety clamp linkage arm, a rotating shaft being installed between the bases of each lifting assembly; the two ends of the rotating shaft are respectively connected to the two swing arms, the bidirectional lifting arm and the swing arm are connected by a rotating pair, the safety clamp linkage arm is slidably installed on the swing arm, so as to link the safety clamp linkage arm to lift the safety clamp by lifting or pulling down the swing arm through the bidirectional lifting arm, and synchronously link the rotating shaft to rotate; wherein the safety clamp linkage arm is slidably matched with the swing arm to match the lifting stroke of the safety clamp. The bidirectional lifting mechanism of the present invention can lift the bidirectional safety clamp in both directions, thereby realizing the triggering and resetting of the bidirectional safety clamp, and has a simple structure, and is used in conjunction with a bidirectional speed limiter and a bidirectional safety clamp.

Description

Technical Field

[0001] The invention belongs to the technical field of elevator components, and particularly relates to a bidirectional lifting mechanism. Background Art

[0002] The safety clamp's lifting mechanism is a critical elevator safety component. Installed on the car, it transmits a pulling force when the speed limiter is triggered, enabling synchronized actuation of the left and right safety clamps. During normal elevator operation, a certain force is set to prevent erroneous actuation of the safety clamps. Existing lifting mechanisms are primarily suitable for unidirectional safety clamps. Bidirectional safety clamps require two sets of lifting mechanisms, resulting in a more complex structure. Summary of the Invention

[0003] Based on the above-mentioned shortcomings and deficiencies in the prior art, an object of the present invention is to provide a bidirectional pulling mechanism.

[0004] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0005] A two-way lifting mechanism includes a pair of lifting assemblies, the lifting assembly includes a base, a two-way lifting arm, a swing arm and a safety clamp linkage arm, and a rotating shaft is installed between the bases of each lifting assembly; the two ends of the rotating shaft are respectively connected to the two swing arms, the two-way lifting arm and the swing arm are connected by a rotating pair, and the safety clamp linkage arm is slidably installed on the swing arm to lift or pull down the swing arm by the two-way lifting arm to link the safety clamp linkage arm to lift the safety clamp, and synchronously link the rotating shaft to rotate; wherein, the safety clamp linkage arm is slidably matched with the swing arm to match the lifting stroke of the safety clamp.

[0006] As a preferred solution, the lifting assembly further includes a reset mechanism for resetting the rotating shaft or the bidirectional lifting arm or the swing arm.

[0007] As a preferred solution, the reset mechanism includes a rotating cam, an upper spring seat, a lower spring seat and an elastic member. The rotating cam is sleeved outside the rotating shaft and rotates synchronously with the rotating shaft. The upper spring seat and the lower spring seat are respectively slidably mounted on the base and are located on both sides of the rotating cam.

[0008] The elastic member is a tension spring, and the two ends of the tension spring are respectively connected to the upper spring seat and the lower spring seat. When the rotating cam rotates, the rotating cam drives the upper spring seat and the lower spring seat to move away from each other to stretch the tension spring; or, the elastic member is a compression spring, and the compression springs are respectively arranged corresponding to the upper spring seat and the lower spring seat. When the rotating cam rotates, the rotating cam drives the upper spring seat and the lower spring seat to move away from each other to compress their respective compression springs.

[0009] As a preferred solution, there are two tension springs, which are distributed on both sides of the rotating cam.

[0010] As a preferred solution, the reset mechanism can also prevent the safety clamp from malfunctioning.

[0011] As a preferred solution, the lifting assembly further includes a reset member for sliding reset of the safety clamp linkage arm.

[0012] As a preferred solution, the reset member is a spring, and both ends of the spring are respectively installed on the safety clamp linkage arm and the swing arm.

[0013] As a preferred solution, the rotating shaft is a segmented structure.

[0014] As a preferred solution, the base is provided with a safety switch, and correspondingly, the rotating shaft is provided with a trigger member; when the rotating shaft rotates to the target position, the trigger member triggers the safety switch.

[0015] As a preferred solution, the triggering member is a sleeve structure, and its outer wall has a V-shaped groove corresponding to the triggering head of the safety switch.

[0016] As a preferred solution, both ends of the bidirectional lifting arm are respectively provided with wire rope rings.

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

[0018] The bidirectional pulling mechanism of the present invention can pull the bidirectional safety clamp in both directions, thereby realizing the triggering, resetting and malfunction of the bidirectional safety clamp, and has a simple structure, and is used in conjunction with a bidirectional speed limiter and a bidirectional safety clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 1 is a schematic structural diagram of a bidirectional lifting mechanism according to embodiment 1 of the present invention;

[0020] Figure 2 2 is a schematic structural diagram of the right lifting assembly of Example 1 of the present invention;

[0021] Figure 3 is a structural schematic diagram of the right lifting assembly of Example 1 of the present invention from another perspective;

[0022] Figure 4 1 is a schematic structural diagram of the reset mechanism (with the tension spring omitted) of Example 1 of the present invention;

[0023] Figure 5 2 is a schematic structural diagram of the left-lifting assembly according to embodiment 1 of the present invention;

[0024] Figure 6 Schematic diagram of the structure of the trigger member of embodiment 1 of the present invention. DETAILED DESCRIPTION

[0025] To more clearly illustrate the embodiments of the present invention, specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other embodiments can be obtained based on these drawings without inventive efforts.

[0026] Example 1:

[0027] like Figure 1-6 As shown, the bidirectional lifting mechanism of this embodiment includes a pair of lifting assemblies, namely a left lifting assembly I and a right lifting assembly II. The structures of the left lifting assembly I and the right lifting assembly II are mirror images of each other. This embodiment is described in detail using the structure of the right lifting assembly II as an example.

[0028] like Figure 2 and 3 As shown, the right lifting assembly II of this embodiment includes a base 1, a bidirectional lifting arm 2, a swing arm 3, a safety gear linkage arm 4, a return spring 5, and a return mechanism. The base 1 is mounted on the car and is used to mount the other components of the right lifting assembly. The bidirectional lifting arm 2 is provided with wire rope loops 20 at its upper and lower ends for connection to the wire rope, enabling bidirectional lifting of the bidirectional lifting mechanism.

[0029] Specifically, a rotating shaft 6 is installed between the bases of the left and right lifting assemblies. The left and right ends of the rotating shaft 6 respectively pass through the bases of the left and right lifting assemblies and are fixedly connected to the swing arm 3. The axial direction of the swing arm 3 is perpendicular to the axial direction of the rotating shaft 6. The rotating shaft 6 has a segmented structure, which facilitates on-site installation and commissioning.

[0030] The middle part of the two-way lifting arm 2 is connected to the swing arm 3 by a rotating pair (for example, the existing commonly used combination connection method of a pin shaft, a gasket, and a fixed pin), and the safety clamp linkage arm 4 is slidably installed on the swing arm 3. The safety clamp linkage arm 4 is connected to the brake roller of the safety clamp Q, so that the two-way lifting arm 2 can lift or pull down the swing arm 3 to link the safety clamp linkage arm 4 to lift the safety clamp Q, and synchronously link the rotating shaft 6 to rotate; wherein, the safety clamp linkage arm 4 slides and cooperates with the swing arm 3 to match the lifting stroke of the safety clamp Q.

[0031] Specifically, the specific structure of the safety gear linkage arm 4 in this embodiment being slidably mounted on the swing arm 3 is as follows:

[0032] The swing arm 3 and the safety clamp linkage arm 4 are both long flat plate structures. The safety clamp linkage arm 4 is fitted to the swing arm 3 and is fixedly installed by two spaced-apart pins L. The specific fixed installation structure can refer to the existing technology and will not be repeated here; wherein, the safety clamp linkage arm 4 has a waist-shaped travel hole 40 corresponding to the pin L, so that the safety clamp linkage arm 4 is fixedly installed on the surface of the swing arm 3 and can slide.

[0033] In addition, the two ends of the reset spring 5 of this embodiment are respectively installed on the swing arm 3 and the safety clamp linkage arm 4, and are used for sliding reset of the safety clamp linkage arm 4, thereby realizing reset of the safety clamp.

[0034] The reset mechanism of this embodiment is used to reset the rotating shaft, thereby resetting the swing arm and the bidirectional lifting arm, while also preventing malfunction of the safety clamp. Specifically, the reset mechanism comprises a rotating cam K1, an upper tension spring seat K2, a lower tension spring seat K3, and a tension spring K4. The rotating cam K1 is sleeved around the rotating shaft 6 and rotates synchronously with the rotating shaft 6. The upper and lower tension spring seats K2 and K3 are slidably mounted on the base 1, located above and below the rotating cam K1. The upper and lower ends of the tension spring K4 are connected to the upper and lower tension spring seats K2 and K3, respectively. In this embodiment, there are two tension springs K4, located on the front and rear sides of the rotating cam K1, to enhance the stability of the rotating shaft reset. The rotating cam K1 has a runway-shaped structure. When the rotating cam K1 rotates, it drives the upper and lower tension spring seats K2 and K3 away from each other, thereby stretching the tension springs. When the rotating force of the rotating cam K1 is released, the rotating cam K1 and the rotating shaft 6 are reset by the tension springs. In addition, this embodiment utilizes the force amplification effect of the rotating cam, and the spring force required to prevent misoperation is smaller than that of the existing safety clamps. Therefore, the tension spring of this embodiment has lower force requirements.

[0035] The specific structure of the upper spring seat K2 and the lower spring seat K3 of this embodiment being slidably mounted on the base 1 can refer to the structure of the safety clamp linkage arm being slidably mounted on the swing arm. Only one pin shaft is required for installation. Accordingly, the upper spring seat and the lower spring seat have waist-shaped travel holes K0 corresponding to various pin shafts, so that they can be installed and slide.

[0036] The base of the left-hand pull assembly in this embodiment is mounted with a safety switch 7, which utilizes a UKS switch. Accordingly, the rotating shaft 6 is provided with a trigger member 8, which is a sleeve structure with a V-shaped groove 80 on its outer wall corresponding to the trigger head of the safety switch 7. When the rotating shaft 6 rotates to the target position, the trigger member 8 triggers the safety switch 7. The V-shaped groove design of the trigger member in this embodiment enables bidirectional triggering of the safety switch.

[0037] The working principle of the bidirectional pulling mechanism of this embodiment is as follows:

[0038] The two-way lifting arm is lifted up, and the two-way lifting arm is linked to the swing arm, and the swing arm is synchronously linked to the safety clamp linkage arm and the rotating shaft. During the process of the safety clamp linkage arm linking the brake roller of the safety clamp, the safety clamp linkage arm slides and cooperates with the swing arm until the brake roller fits the elevator guide rail to achieve braking. At this time, the reset spring is in a stretched state, so that the safety clamp linkage arm and the safety clamp are reset; in addition, during the rotation of the rotating shaft, the rotating cam rotates synchronously, and the rotating cam drives the upper tension spring seat to rotate. During reset, the rotating shaft is reset under the action of the tension spring.

[0039] Similarly, pulling down the two-way lifting arm can also trigger and reset the safety clamp, which will not be described here.

[0040] Example 2:

[0041] The bidirectional pulling mechanism of this embodiment differs from that of embodiment 1 in that:

[0042] The tension spring of the reset mechanism is replaced with a compression spring, and the corresponding compression springs are installed on the base at the corresponding upper and lower tension spring seats. When the rotating cam rotates, the rotating cam drives the upper and lower tension spring seats away from each other to compress the corresponding compression springs. When the rotating force of the rotating cam is released, the rotating cam and the rotating shaft are reset under the action of the compression spring. This realizes the structural diversification of the reset mechanism to meet the needs of different application scenarios.

[0043] For other structures, please refer to Example 1.

[0044] Example 3:

[0045] The bidirectional pulling mechanism of this embodiment differs from that of embodiment 1 in that:

[0046] The number of tension springs can be simplified. The left and right lifting assemblies are each equipped with one tension spring, which can be distributed diagonally to meet the needs of different applications.

[0047] For other structures, please refer to Example 1.

[0048] Example 4:

[0049] The bidirectional pulling mechanism of this embodiment differs from that of embodiment 1 in that:

[0050] The return spring can be replaced by an existing commonly used return component such as a cylinder to meet the needs of different applications;

[0051] For other structures, please refer to Example 1.

[0052] Example 5:

[0053] The bidirectional pulling mechanism of this embodiment differs from that of embodiment 1 in that:

[0054] The reset mechanism of Example 1 can also be replaced by an existing commonly used reset member or reset assembly such as a spring member, and can be set for the rotating shaft or the two-way pulling arm or the swing arm. If one of the three can be reset, all can be reset to meet the needs of different applications.

[0055] For other structures, please refer to Example 1.

[0056] Example 6:

[0057] The bidirectional pulling mechanism of this embodiment differs from that of embodiment 1 in that:

[0058] The rotating shaft can also be designed to be telescopic, which makes it easy to adjust the length of the rotating shaft to meet the needs of different applications;

[0059] For other structures, please refer to Example 1.

[0060] 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 those skilled in the art, based on the ideas provided by the present invention, there will be changes in the specific implementation methods, and these changes should also be considered within the scope of protection of the present invention.

Claims

1. A two-way lifting mechanism, characterized in that: The lifting assembly comprises a pair of lifting assemblies, each comprising a base, a two-way lifting arm, a swing arm, and a safety gear linkage arm. A rotating shaft is installed between the bases of each lifting assembly; the two ends of the rotating shaft are respectively connected to the two swing arms, and the two-way lifting arm and the swing arm are connected by a rotating pair. The safety gear linkage arm is slidably mounted on the swing arm, so that the safety gear linkage arm is linked to lift the safety gear by lifting or pulling down the swing arm by the two-way lifting arm, and the rotating shaft is rotated synchronously with the linkage; The safety gear linkage arm is slidably matched with the swing arm to match the lifting stroke of the safety gear; The lifting assembly further includes a reset mechanism for resetting the rotating shaft or the bidirectional lifting arm or the swing arm; The reset mechanism includes a rotating cam, an upper spring seat, a lower spring seat and an elastic member. The rotating cam is sleeved outside the rotating shaft and rotates synchronously with the rotating shaft. The upper spring seat and the lower spring seat are respectively slidably mounted on the base and are located on both sides of the rotating cam. The elastic member is a tension spring, and the two ends of the tension spring are respectively connected to the upper spring seat and the lower spring seat. When the rotating cam rotates, the rotating cam drives the upper spring seat and the lower spring seat to move away from each other to stretch the tension spring; or, the elastic member is a compression spring, and the compression springs are respectively arranged corresponding to the upper spring seat and the lower spring seat. When the rotating cam rotates, the rotating cam drives the upper spring seat and the lower spring seat to move away from each other to compress their respective compression springs.

2. A bidirectional pulling mechanism according to claim 1, characterized in that: There are two tension springs distributed on both sides of the rotating cam.

3. A bidirectional pulling mechanism according to claim 1, characterized in that: The reset mechanism can also prevent the safety clamp from malfunctioning.

4. A bidirectional lifting mechanism according to any one of claims 1 to 3, characterized in that: The lifting assembly also includes a reset member for sliding reset of the safety gear linkage arm.

5. A bidirectional pulling mechanism according to claim 4, characterized in that: The reset member is a spring, and both ends of the spring are respectively installed on the safety clamp linkage arm and the swing arm.

6. A bidirectional lifting mechanism according to any one of claims 1 to 3, characterized in that: The rotating shaft is a segmented structure.

7. A bidirectional lifting mechanism according to any one of claims 1 to 3, characterized in that: The base is provided with a safety switch, and correspondingly, the rotating shaft is provided with a trigger member; when the rotating shaft rotates to a target position, the trigger member triggers the safety switch.

8. A bidirectional lifting mechanism according to any one of claims 1 to 3, characterized in that: Both ends of the bidirectional lifting arm are respectively provided with wire rope rings.

Images