A safety clamp lifting mechanism and a lifting assembly

Abstract

The present invention belongs to the technical field of elevator safety, and particularly relates to a safety gear lifting mechanism and a lifting assembly. The safety gear lifting mechanism includes a mounting seat, a rotating shaft, a cam, and a lifting arm. The cam is mounted on the mounting seat through the rotating shaft, and the lifting arm is linked to the cam. Under the action of an external force, the lifting arm moves up or down to drive the cam to rotate, and the rotation of the cam drives the jaw body of the safety gear to move horizontally and cooperate with the mounting seat. The safety gear lifting mechanism of the present invention drives the jaw body of the safety gear to move horizontally, so as to drive the safety gear wedge block to contact and friction with the guide rail, thereby realizing the frictional braking between the safety gear wedge block and the guide rail. It is different from the principle of the existing safety gear lifting mechanism, and has a simple structure and is convenient for installation.

Description

Technical Field

[0001] The present invention belongs to the technical field of elevator safety, and particularly relates to a safety gear lifting mechanism and a lifting assembly. Background Art

[0002] The safety gear lifting mechanism is an important part of the elevator safety system. When the elevator overspeed, a pulling force is generated by the speed governor, and then the safety gear wedge block is lifted by a pull rod connected to the speed governor wire rope, so that the safety gear clamps the guide rail to brake the car. The structure of the existing safety gear lifting mechanism is relatively complex, and it is difficult to apply a two-way safety gear with only two wedges, and its structure is more complex. Summary of the Invention

[0003] Based on the above-mentioned drawbacks and deficiencies existing in the prior art, one of the purposes of the present invention is to at least solve one or more of the above problems existing in the prior art. In other words, one of the purposes of the present invention is to provide a safety gear lifting mechanism and a lifting assembly that meet one or more of the foregoing requirements.

[0004] In order to achieve the above invention purpose, the present invention adopts the following technical solutions:

[0005] A safety gear lifting mechanism includes a mounting seat, a rotating shaft, a cam and a lifting arm. The cam is installed on the mounting seat through the rotating shaft, and the lifting arm is linked with the cam; under the action of an external force, the lifting arm moves up or down to drive the cam to rotate, and the rotation of the cam drives the body of the safety gear to move horizontally, so that the wedge block of the safety gear contacts the guide rail and then self-locks and moves upward to achieve braking.

[0006] As a preferred solution, the mounting seat has several transverse travel holes, and each transverse travel hole corresponds to a spacer kit for installing the body of the safety gear on the mounting seat; the spacer kit is movably fitted in its corresponding transverse travel hole, so that the body of the safety gear is horizontally movably fitted on the mounting seat.

[0007] As a preferred solution, the spacer kit sequentially includes an abutting section, an intermediate section and a fixing section along its axial direction. The abutting section and the fixing section are respectively located on both sides of the transverse travel hole of the mounting seat, and the structure of the intermediate section matches the structure of the transverse travel hole; the abutting section is limited outside the transverse travel hole, and the fixing section is fixedly installed with the body of the safety gear.

[0008] As a preferred solution, a reset and tensioning member is installed on the mounting seat for resetting and tensioning the body of the safety gear.

[0009] As a preferred solution, the reset and tensioning member is a torsion spring. Correspondingly, the mounting seat has a horizontally extending kidney-shaped hole, and the body of the safety gear is fixedly installed with two horizontally distributed first pin shafts corresponding to the kidney-shaped hole; the torsion spring is installed on the mounting seat, and the two torsion arms of the torsion spring respectively abut against the inside of the two first pin shafts.

[0010] As a preferred solution, two second pin shafts are respectively installed on the mounting base corresponding to the two torsion arms of the torsion spring, and the two torsion arms respectively abut against the inside of the two second pin shafts.

[0011] As a preferred solution, it further includes a two-way linkage seat. The two-way linkage seat includes a seat body, a first trigger lug and a second trigger lug that are bent and extended on both sides thereof. The cam is located between the first trigger lug and the second trigger lug. The first trigger lug is fixedly installed with the jaw body of the safety clamp; the seat body has an avoidance hole for the penetration of the rotating shaft and the avoidance of the lateral movement of the two-way linkage seat; the cam rotates clockwise or counterclockwise to link the second trigger lug or the first trigger lug.

[0012] As a preferred solution, the safety clamp is a two-way safety clamp or a one-way safety clamp.

[0013] The present invention also provides a safety clamp lifting assembly, which is applied to the synchronous lifting of two safety clamps installed on a car, and includes: a safety clamp lifting mechanism as described in any one of the above solutions is provided corresponding to each safety clamp, and the rotating shafts of the two safety clamp lifting mechanisms rotate synchronously.

[0014] As a preferred solution, a horizontal lifting plate is provided corresponding to each lifting arm; the horizontal lifting plate has a movable stroke hole adjacent to the first end of the lifting arm, and the lifting end of the lifting arm is rotatably connected to the movable stroke hole of the horizontal lifting plate; the second ends of the two horizontal lifting plates away from the lifting arm are synchronously rotated through a linkage shaft, and the linkage shaft is installed on the mounting base; under the action of an external force, the horizontal lifting plate is lifted or lowered to synchronously link the lifting arm and the linkage shaft.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The safety clamp lifting mechanism of the present invention drives the jaw body of the safety clamp to move horizontally, so as to link the safety clamp wedge block and the guide rail to contact and friction, thereby realizing the friction braking between the safety clamp wedge block and the guide rail; it is different from the principle of the existing safety clamp lifting mechanism, and has a simple structure and is convenient for installation, especially has advantages in the lifting mode of the two-way safety clamp.

[0017] The safety clamp lifting assembly of the present invention realizes the synchronous lifting of two safety clamps through a cam and linkage components, improving the safety performance of the elevator car. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the safety clamp lifting mechanism (including the safety clamp) of Embodiment 1 of the present invention;

[0019] Figure 2 is a schematic structural diagram of the safety clamp lifting mechanism (including the safety clamp) of Embodiment 1 of the present invention from another perspective;

[0020] Figure 3 It is a schematic structural view of the cam and the lifting arm of Embodiment 1 of the present invention;

[0021] Figure 4 It is a schematic structural view of the safety clamp lifting mechanism of Embodiment 1 of the present invention;

[0022] Figure 5 It is a schematic structural view of the shaft kit of Embodiment 1 of the present invention;

[0023] Figure 6 It is a schematic structural view of the two-way linkage seat of Embodiment 1 of the present invention;

[0024] Figure 7 It is a schematic structural view of the safety clamp lifting assembly of Embodiment 1 of the present invention;

[0025] Figure 8 It is a schematic structural view of the safety clamp lifting assembly of Embodiment 2 of the present invention. Detailed implementation manners

[0026] In order to more clearly illustrate the embodiments of the present invention, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, and other implementation manners can be obtained.

[0027] Embodiment 1:

[0028] As Figure 1-6 shown, the safety clamp lifting mechanism of this embodiment is used for lifting the two-way safety clamp 0, and specifically includes a mounting seat 1, a rotating shaft 2, a cam 3, a lifting arm 4, a spacer kit 5, a torsion spring 6, a first pin 7, a second pin 8, and a two-way linkage seat 9. The cam 3 is installed on the left front side of the mounting seat 1 through the rotating shaft 2, and the other end of the lifting arm 4 far from the lifting end is linked with the cam 3, and specifically can be integrally formed or realized by a pin passing through for linkage connection.

[0029] The mounting seat 1 of this embodiment has four horizontal travel holes 1a (the number is not limited to the example of four, and can be specifically adjusted according to actual needs), with two distributed on the upper and lower sides respectively, and the horizontal travel holes are in the shape of kidney-shaped holes; each horizontal travel hole corresponds to the installation of a spacer kit 5, and the spacer kit 5 is used to install the clamp body of the safety clamp on the front side of the mounting seat 1; the spacer kit 5 is movably fitted in its corresponding horizontal travel hole, so that the clamp body of the safety clamp is horizontally movably fitted on the left and right sides of the mounting seat 1. Specifically, as Figure 5As shown, the spacer kit 5 sequentially includes an abutting section 5-1, an intermediate section 5-2, and a fixing section 5-3 along its axial direction. The abutting section 5-1 and the fixing section 5-3 are respectively located at the rear side and the front side of the lateral travel hole of the mounting base. The structure of the intermediate section matches the structure of the lateral travel hole, that is, the diameter of the intermediate section matches the width of the lateral travel hole; the abutting section 5-1 is limited outside the lateral travel hole 1a, that is, the diameter of the abutting section is greater than the width of the lateral travel hole; the fixing section is fixedly installed with the jaw body of the safety clamp, and the diameter of the fixing section is smaller than the width of the lateral travel hole, facilitating passing through the lateral travel hole, so as to be fixedly connected with the jaw body of the safety clamp; thereby realizing the longitudinal fixed installation of the safety clamp on the front side of the mounting base, and the safety clamp can move laterally along the mounting base under the action of an external force.

[0030] A torsion spring 6 is installed on the rear side of the mounting base 1 of this embodiment, that is, fixed installation is achieved by passing a bolt or a screw through the spiral structure of the torsion spring. The torsion spring 6 is used for the reset and tensioning of the jaw body of the safety clamp. Specifically, the mounting base 1 has a horizontally extending kidney-shaped hole 1b, and two horizontally distributed first pin shafts 7 are fixedly installed on the jaw body of the safety clamp corresponding to the kidney-shaped hole 1b. The two torsion arms of the torsion spring 6 respectively abut against the two first pin shafts to realize the reset and tensioning after the safety clamp moves laterally. Among them, the length of the kidney-shaped hole 1b needs to ensure that the stroke of the first pin shaft moving along the kidney-shaped hole is not limited when the safety clamp moves laterally to the maximum stroke. In addition, two horizontally distributed second pin shafts 8 are respectively installed on the mounting base 1 corresponding to the two torsion arms of the torsion spring, and the two torsion arms respectively abut against the two second pin shafts to further improve the lifting and tensioning performance.

[0031] As Figure 6 As shown, the two-way linkage seat 9 of this embodiment includes a seat body 9-0 and a first trigger lug 9-1 and a second trigger lug 9-2 bent and extended on both sides thereof. The cam 3 is located between the first trigger lug 9-1 and the second trigger lug 9-2, so that after the cam rotates clockwise or counterclockwise, it can abut against the first trigger lug 9-1 or the second trigger lug 9-2 to drive the safety clamp to move laterally. Among them, the first trigger lug 9-1 is fixedly installed with the jaw body of the safety clamp; the seat body 9-0 has an avoidance hole K for the penetration of the rotating shaft 2 and the avoidance of the lateral movement of the two-way linkage seat.

[0032] Under the action of an external force, the lifting end of the lifting wall is lifted, the lifting arm is lifted or lowered, the cam rotates clockwise or counterclockwise to link the second trigger lug or the first trigger lug, thereby linking the two-way linkage seat to move horizontally to the left or right, driving the jaw body of the safety clamp to move horizontally to the left or right, and realizing the contact friction braking between the wedge block of the two-way safety clamp and the elevator guide rail.

[0033] The safety clamp lifting assembly of this embodiment is applied to the synchronous lifting of two two-way safety clamps installed on the car. Specifically, as Figure 7As shown in the figure, the safety gear lifting assembly includes the safety gear lifting mechanism of this embodiment corresponding to each bi-directional safety gear; the rotating shafts of the two safety gear lifting mechanisms are integrally formed into the same linkage shaft I, and one of the lifting arms can also be omitted to achieve synchronous rotation of the rotating shafts of the two safety gear lifting mechanisms; in addition, a safety switch 10 is installed on any one of the mounting seats, and correspondingly, a switch hitting sleeve 11 is installed on the linkage shaft I to improve the safety braking performance of the safety gear.

[0034] Embodiment 2:

[0035] The difference between the safety gear lifting assembly of this embodiment and that of Embodiment 1 lies in:

[0036] In order to avoid the installation space, the linkage shaft needs to be moved outwards; specifically, as Figure 8 shown in the figure, a horizontal lifting plate 12 is provided corresponding to each lifting arm; the first end of the horizontal lifting plate 12 adjacent to the lifting arm has a movable stroke hole 12a, and the movable stroke hole 12a is a triangular hole structure. The lifting end (i.e., the left end) of the lifting arm 40 is rotatably connected to the movable stroke hole of the horizontal lifting plate; the second ends of the two horizontal lifting plates away from the lifting arm (i.e., the left ends of the horizontal lifting plates) are synchronously rotated through a linkage shaft II, and the linkage shaft II is installed on the extension seat 1c of the mounting seat; under the action of an external force, the horizontal lifting plate is lifted or lowered to synchronously drive the lifting arm and the linkage shaft. In addition, a spring piece 13 for resetting and tensioning is provided corresponding to the linkage shaft II for resetting and tensioning the linkage shaft.

[0037] Other structures can refer to Embodiment 1.

[0038] Embodiment 3:

[0039] The difference between the safety gear lifting mechanism of this embodiment and that of Embodiment 1 lies in:

[0040] For the design of the above-mentioned reset and tensioning components corresponding to the torsion spring, common existing reset and tensioning mechanisms can also be used, as long as the lateral movement reset and tensioning of the safety gear body can be achieved to meet the requirements of different application occasions;

[0041] Other structures can refer to Embodiment 1.

[0042] Embodiment 4:

[0043] The difference between the safety gear lifting mechanism of this embodiment and that of Embodiment 1 lies in:

[0044] For the unidirectional safety gear, the setting of the bi-directional linkage seat can also be omitted to simplify the structure of the lifting mechanism, and the function of lifting and braking can also be satisfied to meet the requirements of different application occasions;

[0045] Other structures can refer to Embodiment 1.

[0046] It should be noted that the above-mentioned embodiments can be freely combined as needed. The above is only a detailed description of the preferred embodiments and principles of the present invention. For those of ordinary skill in the art, according to the idea provided by the present invention, there will be changes in the specific implementation manners, and these changes should also be regarded as the protection scope of the present invention.

Claims

1. A safety gear lifting mechanism, characterized in that, It includes a mounting base, a rotating shaft, a cam and a lifting arm. The cam is mounted on the mounting base through the rotating shaft, and the lifting arm is linked with the cam. Under the action of an external force, the lifting arm moves up or down to drive the cam to rotate, and the rotation of the cam drives the body of the safety clamp to move horizontally, so that the wedge block of the safety clamp contacts the guide rail and then self-locks and moves upward to achieve braking. A reset and tensioning member is mounted on the mounting base for resetting and tensioning the body of the safety clamp. The reset and tensioning member is a torsion spring. Correspondingly, the mounting base has a horizontally extending kidney-shaped hole, and the body of the safety clamp is fixedly provided with two horizontally distributed first pin shafts corresponding to the kidney-shaped hole. The torsion spring is mounted on the mounting base, and the two torsion arms of the torsion spring respectively abut against the inside of the two first pin shafts.

2. The safety tong lifting mechanism according to claim 1, characterized in that, The mounting base has several horizontal travel holes, and each horizontal travel hole is correspondingly provided with a spacer set for mounting the body of the safety clamp on the mounting base. The spacer set is movably fitted in its corresponding horizontal travel hole, so that the body of the safety clamp is horizontally movably fitted on the mounting base.

3. The safety tong lifting mechanism according to claim 2, characterized in that, The spacer set sequentially includes an abutting section, an intermediate section and a fixing section along its axial direction. The abutting section and the fixing section are respectively located on both sides of the horizontal travel hole of the mounting base, and the structure of the intermediate section matches the structure of the horizontal travel hole. The abutting section is limited outside the horizontal travel hole, and the fixing section is fixedly mounted with the body of the safety clamp.

4. The safety tong lifting mechanism according to claim 1, characterized in that, The mounting base is also respectively provided with two second pin shafts corresponding to the two torsion arms of the torsion spring, and the two torsion arms respectively abut against the inside of the two second pin shafts.

5. A safety gear lifting mechanism according to any one of claims 1-4, characterized in that, It further includes a two-way linkage seat. The two-way linkage seat includes a seat body and a first trigger lug and a second trigger lug bent and extended on both sides thereof. The cam is located between the first trigger lug and the second trigger lug. The first trigger lug is fixedly mounted with the body of the safety clamp. The seat body has an avoidance hole for the penetration of the rotating shaft and the avoidance of the horizontal movement of the two-way linkage seat. The cam rotates clockwise or counterclockwise to drive the second trigger lug or the first trigger lug.

6. The safety tong lifting mechanism according to claim 5, characterized in that, The safety clamp is a two-way safety clamp or a one-way safety clamp.

7. A safety gear lifting assembly, which is applied to the synchronous lifting of two safety gears installed on a car, is characterized in that It includes: A safety clamp lifting mechanism as described in any one of claims 1-6 is provided corresponding to each safety clamp, and the rotating shafts of the two safety clamp lifting mechanisms rotate synchronously.

8. The safety tong lifting assembly according to claim 7, characterized in that, A horizontal lifting plate is provided corresponding to each lifting arm. The horizontal lifting plate has a movable travel hole adjacent to the first end of the lifting arm, and the lifting end of the lifting arm is rotatably connected to the movable travel hole of the horizontal lifting plate. The second ends of the two horizontal lifting plates away from the lifting arm are synchronously rotated through a linkage shaft, and the linkage shaft is mounted on the mounting base. Under the action of an external force, the horizontal lifting plate moves up or down to synchronously drive the lifting arm and the linkage shaft.

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