Safety clamp and elevator

Abstract

The present invention belongs to the technical field of elevators, and specifically relates to a safety clamp and an elevator. The safety clamp includes a clamp body and a sliding wedge installed on the clamp body, and also includes a lifting plate, which lifts the sliding wedge through a linkage pin; the lifting plate has a travel groove extending in the direction of lifting the sliding wedge, and the linkage pin can move along the travel groove. In the safety clamp and elevator of the present invention, when the lifting mechanism is excessively or prematurely limited within a certain amount, the sliding wedge and the linkage pin can still quickly rise a certain stroke in the travel groove of the lifting plate, so that the sliding wedge reaches the designed stroke. In addition, when the difference in the travel of the sliding wedges of the left and right safety clamps of the elevator is too large or the asynchronous movement is within a certain amount, the sliding wedge and the linkage pin can quickly rise a certain stroke in the travel groove of the lifting plate, reducing the probability of the two safety clamps being out of sync.

Description

Technical Field

[0001] The present invention belongs to the technical field of elevators, and in particular relates to a safety clamp and an elevator. Background Art

[0002] The traditional single-lift safety gear has no vertical movement between the sliding wedge, single-lift plate and fixed pin. In other words, the traditional design is almost a rigid connection in the vertical direction. Due to improper installation and adjustment, it has the following shortcomings and deficiencies:

[0003] 1. When the lifting mechanism has a limit function, it may be excessively or prematurely limited, causing the actual travel of the sliding wedge to fail to reach the designed travel, which may easily cause insufficient actual braking force of the safety gear;

[0004] 2. When the travel difference of the sliding wedges of the left and right safety clamps is too large or they move asynchronously, it is easy to cause the elevator car to tilt or other parts of the elevator to be damaged. Summary of the Invention

[0005] In view of the above-mentioned shortcomings and deficiencies in the prior art, the present invention provides a safety clamp and an elevator.

[0006] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0007] A safety clamp comprises a clamp body and a sliding wedge mounted on the clamp body, and also comprises a lifting plate, which lifts the sliding wedge through a linkage pin; the lifting plate has a travel groove extending in the direction of lifting the sliding wedge, and the linkage pin can move along the travel groove.

[0008] As a preferred solution, there are two sliding wedges, which are relatively distributed at a target distance; accordingly, the linkage pins correspond one-to-one to the sliding wedges, and the single lifting plate has two travel grooves, which correspond one-to-one to the linkage pins.

[0009] As a preferred solution, a return spring is provided between the lifting plate and the sliding wedge.

[0010] As a preferred solution, the first end of the return spring is connected to the sliding wedge, the second end of the return spring is connected to the lifting plate, and the first end and the second end of the return spring are respectively located on the upper and lower sides of the linkage pin.

[0011] As a preferred solution, the lifting plate has a lug extending to below the sliding wedge, and the second end of the return spring is connected to the lug.

[0012] As a preferred solution, the lifting plate is an axisymmetric structure.

[0013] As a preferred solution, the first end of the linkage pin is connected to the sliding wedge, and the second end of the linkage pin is movably matched with the travel groove.

[0014] As a preferred solution, a gasket is installed at the second end of the linkage pin, and the gasket is attached to the side of the lifting plate facing away from the sliding wedge block; the outer diameter of the gasket is larger than the groove width of the travel groove.

[0015] As a preferred solution, it further includes a pull rod, one end of which is connected to the lifting plate, and the other end of which extends outside the clamp body.

[0016] The present invention also provides an elevator, comprising a car, on which the safety clamp as described in any of the above solutions is installed.

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

[0018] In the safety gear and elevator of the present invention, when the lifting mechanism is over- or prematurely limited within a certain amount, the sliding wedge and linkage pin can still quickly rise within the travel groove of the lifting plate to a certain distance, allowing the sliding wedge to reach its designed travel. Furthermore, when the travel difference between the sliding wedges of the left and right safety gears of the elevator is too large or they are out of sync within a certain amount, the sliding wedge and linkage pin can quickly rise within the travel groove of the lifting plate to a certain distance, reducing the probability of the two safety gears being out of sync. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of the front side of the safety gear of Example 1 of the present invention;

[0020] Figure 2 This is a schematic structural diagram of the rear side of the safety gear of Example 1 of the present invention;

[0021] Figure 3 Schematic diagram of the installation structure of the sliding wedge and the lifting plate of the safety gear of Example 1 of the present invention;

[0022] Figure 4 yes Figure 3 Exploded diagram of part of the structure. DETAILED DESCRIPTION

[0023] 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.

[0024] Example 1:

[0025] like Figure 1-4As shown, the safety clamp of this embodiment is a symmetrical progressive safety clamp, including a clamp body 1, a left sliding wedge 2-1, a right sliding wedge 2-2, a lifting plate 3, a left linkage pin 4-1, a right linkage pin 4-2, a pull rod 5, a left return spring 6-1 and a right return spring 6-2.

[0026] The clamp body 1 comprises a frame structure formed by a bottom plate 1-1, a top plate 1-2, and left and right side plates 1-3. The left sliding wedge 2-1 and the right sliding wedge 2-2 are installed within the clamp body 1 and are spaced relative to each other at a target distance. The space corresponding to the target distance is used to install the elevator guide rails.

[0027] The left linkage pin 4-1 is fixedly mounted on the left sliding wedge 2-1, and the right linkage pin 4-2 is fixedly mounted on the right sliding wedge 2-2. Specifically, the left linkage pin is fixedly mounted on the left sliding wedge for illustration. The left sliding wedge has a fixing hole, and the first end of the left linkage pin is inserted into the fixing hole. A bolt or screw is then inserted through the left sliding wedge in a direction perpendicular to the fixing hole until it abuts against the left linkage pin, thereby securing the left linkage pin. The mounting structure between the right sliding wedge and the right linkage pin is similar to the mounting structure between the left sliding wedge and the left linkage pin described above and will not be further described here.

[0028] The lifting plate 3 of this embodiment lifts the left sliding wedge 2-1 and the right sliding wedge 2-2 respectively through the left linkage pin 4-1 and the right linkage pin 4-2. Among them, the lifting plate 3 has a left stroke groove 3-1 and a right stroke groove 3-2 extending in the direction of lifting the above-mentioned sliding wedges. The left linkage pin 4-1 can move along the left stroke groove 3-1, and the right linkage pin 4-2 can move along the right stroke groove 3-2. Specifically, taking the installation structure of the left linkage pin and the lifting plate as an example, the second end of the left linkage pin 4-1 is installed with a left gasket 7-1. The left gasket 7-1 is tightly attached to the side of the lifting plate facing away from the sliding wedge, and the outer diameter of the left gasket is larger than the groove width of the left stroke groove, thereby improving the stability of the left linkage pin moving in the left stroke groove, thereby improving the stability of the overall structure of the safety clamp. In addition, the installation structure between the right linkage pin and the lifting plate refers to the installation structure of the left linkage pin and the lifting plate mentioned above, that is, it will not be repeated here.

[0029] In addition, a left return spring 6-1 is provided between the lifting plate 3 and the left sliding wedge 2-1, and a right return spring 6-2 is provided between the lifting plate 3 and the right sliding wedge 2-2, so as to realize the reset of the two sliding wedges. Specifically, the left and right sides of the bottom of the lifting plate 3 respectively have a left lug 3-3 and a right lug 3-4 extending to the bottom of the left sliding wedge and the right sliding wedge, the top end of the left return spring 6-1 is fixedly installed and connected to the left sliding wedge 2-1, the bottom end of the left return spring 6-1 is fixedly installed and connected to the left lug 3-3 of the lifting plate, and the top and bottom ends of the left return spring 6-1 are respectively located on the upper and lower sides of the left linkage pin 4-1; the top end of the right return spring 6-2 is fixedly installed and connected to the right sliding wedge 2-2, the bottom end of the right return spring 6-2 is fixedly installed and connected to the right lug 3-4 of the lifting plate, and the top and bottom ends of the right return spring 6-2 are respectively located on the upper and lower sides of the right linkage pin 4-2. The fixed installation connection method can be achieved by using bolts or screws.

[0030] The lifting plate 3 of this embodiment is an axisymmetric structure, that is, the left stroke groove 3-1 and the right stroke groove 3-2 are symmetrically distributed, and the left lug 3-3 and the right lug 3-4 are symmetrically distributed.

[0031] In this embodiment, the bottom end of the pull rod 5 is fixedly connected to or integrally formed with the lifting plate 3, and the top end of the pull rod 5 extends above the top plate 1-2 of the clamp body 1 so that the lifting mechanism of the elevator can trigger the lifting.

[0032] The safety clamp of this embodiment has a corresponding stroke groove on the lifting plate. When the lifting mechanism is over- or prematurely limited to a certain amount, the sliding wedge and the linkage pin can still quickly rise a certain stroke in the corresponding stroke groove of the lifting plate, so that the sliding wedge reaches the designed stroke, thereby ensuring the braking performance of the safety clamp.

[0033] The elevator of this embodiment includes a car, and the safety clamps of this embodiment are respectively installed on the left and right sides of the car. When the difference in the stroke of the sliding wedge blocks of the left and right safety clamps of the elevator is too large or they are not synchronized within a certain amount, the sliding wedge blocks and the linkage pins can quickly rise a certain stroke in the stroke groove of the lifting plate, thereby reducing the probability of the two safety clamps being out of sync.

[0034] Example 2:

[0035] The safety gear of this embodiment is different from that of embodiment 1 in that:

[0036] The safety clamp of this embodiment has a single sliding wedge structure. Accordingly, the travel groove, linkage pin and return spring on the lifting plate only need to be set accordingly, thereby realizing the structural diversification of the safety clamp and meeting the needs of different applications and users.

[0037] Accordingly, the safety gear of this embodiment is installed on the car of the elevator of this embodiment.

[0038] For other structures, please refer to Example 1.

[0039] Example 3:

[0040] The safety gear of this embodiment is different from that of embodiment 1 in that:

[0041] The safety clamp of this embodiment can omit the structure of the reset spring and adopt the existing reset method of the sliding wedge block, thereby achieving structural diversification of the safety clamp and meeting the needs of different applications and users.

[0042] Accordingly, the safety gear of this embodiment is installed on the car of the elevator of this embodiment.

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

[0044] The above description is only a detailed description of the preferred embodiments and principles of the present invention. For ordinary technicians in this field, based on the ideas provided by the present invention, there may be changes in the specific implementation methods, and these changes should also be considered as the scope of protection of the present invention.

Claims

1. A safety clamp comprising a clamp body and a sliding wedge mounted on the clamp body, characterized in that: The lifting plate is further comprised of a lifting plate, which lifts the sliding wedge block via a linkage pin; the lifting plate has a travel groove extending in a direction of lifting the sliding wedge block, and the linkage pin is movable along the travel groove; There are two sliding wedges, which are relatively distributed at a target distance. Accordingly, the linkage pins correspond one-to-one to the sliding wedges, and the single lifting plate has two travel grooves, which correspond one-to-one to the linkage pins. A return spring is provided between the lifting plate and the sliding wedge; The first end of the return spring is connected to the sliding wedge, the second end of the return spring is connected to the lifting plate, and the first end and the second end of the return spring are respectively located on the upper and lower sides of the linkage pin; The lifting plate has a lug extending to below the sliding wedge, and the second end of the return spring is connected to the lug.

2. A safety gear according to claim 1, characterized in that: The lifting plate is an axisymmetric structure.

3. A safety gear according to claim 1, characterized in that: The first end of the linkage pin is connected to the sliding wedge, and the second end of the linkage pin is movably matched with the travel groove.

4. A safety gear according to claim 3, characterized in that: A gasket is installed on the second end of the linkage pin, and the gasket is attached to the side of the lifting plate facing away from the sliding wedge block; the outer diameter of the gasket is larger than the groove width of the travel groove.

5. A safety gear according to claim 1, characterized in that: It also includes a pull rod, one end of which is connected to the lifting plate, and the other end of which extends outside the clamp body.

6. An elevator, comprising a car, characterized in that: The car is installed with the safety clamp according to any one of claims 1 to 5.

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