Elevator compensation chain end connection device

Abstract

The present invention discloses an elevator compensation chain end connection device, in which at least one link at the end of the elevator compensation chain is provided with a separable opposed limiting block; when the opposed limiting blocks are in the closed state, they form an upper fitting surface or a lower fitting surface that is in close contact with the end link; when the elevator compensation chain is adjusted, the opposed limiting blocks can be separated under the action of the chain pulling force and allow the link to be adjusted to pass through. Since the present invention adopts separable opposed limiting blocks to fix the end link, on the one hand, the problem of "there is a gap between the fixing rod and the link and the torsion cannot be completely suppressed" in the prior art is solved by the upper fitting surface or the lower fitting surface that is in close contact with the end link. On the other hand, when the elevator compensation chain is adjusted, the opposed limiting blocks can be separated under the action of the chain pulling force and allow the link to be adjusted to pass through, without disassembling the fixing parts, and at the same time, the problem of the inconvenience of removing the fixing rod and repeatedly installing and disassembling the fixing parts in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the field of elevators, and particularly to an end connection device for an elevator compensation chain. Background Art

[0002] Currently, most end connection devices for compensation chains use U-bolts adapted to the size of the chain links. The U-bolts are easy to install, but since there is no limit constraint between the end chain link and the bent section of the U-bolt, when the elevator moves up and down, the end chain link can swing in a direction perpendicular to the axial plane of the U-bolt, thereby causing the compensation chain to shake.

[0003] In the prior art documents, in order to solve the problems of excessive torsion of the compensation chain or jamming of the connection buckle due to torsion and the phenomenon of the compensation chain being unhooked, some patents adopt the scheme of fixing bolts or fixing rods to fix the end chain link as shown in the attachment Figure 1 shown, such as: Patents CN110668287 A and CN 106185539 A. Their disadvantages are:

[0004] 1. Since the fixing rod needs to pass through the chain link and there is still a gap between the fixing rod and the chain link, torsion cannot be completely suppressed.

[0005] 2. Since the fixing rod restricts the up and down movement of the chain, when readjusting the chain, the bolts or fixing rods need to be removed, which is inconvenient for installation and disassembly.

[0006] At the same time, currently most compensation chains use plastic-coated compensation chains, that is, compensation chains composed of an elastomeric composite material coated on an electric welding iron chain. During the production process of this product, internal stress will be generated in the outer coating layer of the iron chain, and in addition, most plastic-coated compensation chains are factory-produced in a coiled wooden barrel manner, which exacerbates their own internal stress. If directly hung and used, serious shaking will occur when the elevator moves up and down. Therefore, generally before hanging installation, it is required to hang statically for 24 hours to fully release the internal stress, but due to the long aging time, there may be risks of illegal operations and direct hanging during installation, resulting in abnormal shaking of the compensation chain. Such as Patent CN 214652852U.

[0007] In addition, the U-bolt installation method is simple, but when adjusting the position of the compensation chain, generally the U-bolt is removed and hung at a suitable position. However, in actual operation, the secondary protection and the U-bolt need to be disassembled and installed repeatedly, and the height of the bent section of the compensation chain from the ground cannot be accurately controlled, and the position needs to be adjusted repeatedly, thus affecting the efficiency.

[0008] Patent CN 103508293 B, in order to solve the problem of compensation chain adjustment, adopts the method of leaving a section of redundant chain hanging on the compensation chain hanger and temporarily fixing it with a locking bolt and a pressing plate. When adjusting the working condition, the locking bolt is loosened. The disadvantage is that the adjustment process is too complicated and requires repeated disassembly. Summary of the Invention

[0009] In order to overcome the problems in the prior art that there is a gap between the fixed rod and the link, torsion cannot be completely suppressed, and when adjusting the chain, it is necessary to remove the fixed rod, which is inconvenient for installation and disassembly. The elevator compensation chain end connection device of the present invention is provided with a separable opposed limiting block 204 in at least one link at the end of the elevator compensation chain; when the opposed limiting block 204 is combined by an external force, it forms an upper fitting surface and / or a lower fitting surface that is in close contact with the end link; when the elevator compensation chain is adjusted, the opposed limiting block 204 can be separated under the action of the link pulling force to allow the link to be adjusted to pass through.

[0010] Preferably, the opposed limiting block 204 is in a combined state by the elastic force of the spring 203 supported behind each opposed limiting block 204.

[0011] Preferably, the upper fitting surface 2042 or the lower fitting surface 2043 that is in close contact with the end link when the opposed limiting block 204 is in a combined state is an arc-shaped groove 2041.

[0012] Preferably, the upper fitting surface 2042 or the lower fitting surface 2043 that is in close contact with the end link when the opposed limiting block 204 is in a combined state is an inclined surface groove 2044.

[0013] Preferably, the left and right sections of the upper fitting surface 2042 or the lower fitting surface 2043 that is in close contact with the end link when the opposed limiting block 204 is in a combined state are arc-shaped grooves 2041, and the protruding end section 2045 is an inclined surface groove 2044.

[0014] Preferably, there are at least 2 pairs of opposed limiting blocks 204, which are respectively engaged in the upper and lower two link rings at the end of the elevator compensation chain and are in a cross-perpendicular state.

[0015] Preferably, the opposed limiting block 204 is supported on the inner fixing member 201 by the spring 203 and the damper 202.

[0016] Preferably, the inner fixing member 201 is a cylinder, and it is rotatably supported on the outer fixing member 401 through a bearing 301.

[0017] Preferably, the inner fixing member 201 is composed of a cylinder wall 2011 and a guiding fixing member 2012.

[0018] Preferably, the acute angle of the protruding end section is between 15 degrees and 20 degrees.

[0019] Since the present invention adopts the opposed limiting blocks 204 that can be automatically separated and combined to fix the end link, on the one hand, the problem in the prior art that "there is a gap between the fixing rod and the link and the torsion cannot be completely suppressed" is solved by the upper fitting surface and / or the lower fitting surface that is in close contact with the end link. On the other hand, when the elevator compensation chain is adjusted, the opposed limiting blocks 204 can be separated under the action of the chain pulling force and allow the link to be adjusted to pass through, without the need to disassemble the fixing parts. At the same time, the problem in the prior art that it is inconvenient to remove the fixing rod and repeatedly install and disassemble the fixing parts is solved, which has significant progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The drawing shows the solution of using fixing bolts or fixing rods in the prior art to fix the end link.

[0021] Figure 2 The drawing shows the structural schematic diagram of the present invention using opposed limiting blocks to fix the end link.

[0022] Figure 3 The drawing shows the structural diagram of the opposed limiting block with circular arc grooves on the upper and lower fitting surfaces.

[0023] Figure 4 The drawing shows the structural diagram of the limiting block with inclined plane grooves on the upper and lower fitting surfaces.

[0024] Figure 5 The drawing shows the structural schematic diagram with circular arc grooves on the left and right sections of the upper and lower fitting surfaces and inclined plane grooves on the protruding end sections.

[0025] Figure 6 The drawing shows the cross-sectional schematic diagram of the protruding end section with inclined plane grooves.

[0026] Figure 7 The drawing shows the structural schematic diagram with the inner fixing part being a cylinder. DETAILED DESCRIPTION OF THE INVENTION

[0027] As Figure 2 、 Figure 3As shown in the figure, the elevator compensation chain end connection device of the present invention is provided with a limiting device in at least one link at the end of the elevator compensation chain; the limiting device is an opposed limiting block 204 and a rotating device that supports the opposed limiting block 204. Among them, the elevator compensation chain end connection device is composed of an inner fixing member 201, a damper 202, a spring 203, an opposed limiting block 204, and a pin shaft 205. A damper 202 and a spring 203 are arranged between the inner fixing member 201 and the opposed limiting block 204. Under normal conditions, under the action of the spring 203, the protruding portion 2040 of the opposed limiting block 204 extends into the gap of the link, and the circular arc grooves 2041 on the upper fitting surface 2042 and the lower fitting surface 2043 formed thereby are closely attached to the outer contour of the link of the compensation chain 101, thereby restricting the swinging and twisting of the end link and keeping it in a locked working condition. Under the adjustment working condition, by directly pulling the upper chain, due to the transition of the circular arc or inclined surface of the protruding portion of the opposed limiting block 204, a horizontal component force will be generated when the upper chain is pulled and adjusted, which can cause the two opposed limiting blocks 204 to move to both sides respectively, compressing the spring 203 and the damper 202. Until the next two links move to the position of the limiting block, under the action of the spring force, the opposed limiting blocks 204 are in a combined state, forming an upper fitting surface / or a lower fitting surface that is in close contact with the end link, and playing a limiting role again.

[0028] As Figure 2 shown in the figure, the present invention is provided with at least two pairs of opposed limiting blocks 204, which are respectively clamped in the gaps of the upper and lower two links at the end of the elevator compensation chain. In order to better control the swinging or twisting of the end of the elevator compensation chain, the upper and lower two pairs of opposed limiting blocks 204 are in a cross shape in space. Of course, the present invention can also be provided with 3 pairs, 4 pairs, etc. of opposed limiting blocks 204, and the upper and lower adjacent opposed limiting blocks 204 are in a cross shape in space.

[0029] As Figure 3 shown in the figure, the upper fitting surface 2042 or the lower fitting surface 2043 of the opposed limiting block 204 of the present invention is a circular arc groove 2041, and the circular arc groove 2041 fits with the outer surface of the end link;

[0030] As Figure 4 shown in the figure, the upper fitting surface 2042 or the lower fitting surface 2043 of the opposed limiting block 204 of the present invention is designed as an inclined surface groove 2044. The design of the upper fitting surface 2042 or the lower fitting surface 2043 with an inclined surface groove 2044 can make the horizontal component force generated when the upper chain is pulled and adjusted larger under the same pulling force during the adjustment working condition, making the adjustment smoother and more labor-saving.

[0031] If the entire upper fitting surface 2042 or lower fitting surface 2043 of the opposed limiting block 204 is designed in the shape of an inclined groove 2044, to a certain extent, the fitting degree between the upper fitting surface 2042 or lower fitting surface 2043 and the outer surface of the end link will be reduced. Therefore, the design scheme shown in Figure 5 is adopted, that is, for the opposed limiting block 204), when it is in the combined state, the left and right segments of the upper fitting surface 2042 or lower fitting surface 2043 that are in close contact with the end link are circular arc grooves 2041, and the protruding end segment 2045 is an inclined groove 2044. This design not only meets the fitting degree with the outer surface of the end link but also achieves the effect of smoother and more labor-saving adjustment;

[0032] Figure 6 is a cross-sectional schematic diagram of the protruding end segment with an inclined groove. The inclination angle of the protruding end segment can be controlled between 15 degrees and 20 degrees;

[0033] As Figure 7 shown, the inner fixing member (201) is a cylinder, which is composed of a cylinder wall 2011 and a guiding fixing member 2012. Due to the cross-shaped closed structure formed by the guiding fixing member 2012, it can fix and control at least 2 link segments or even the entire end segment of the end link, better restricting the torsion and swing of the end chain;

[0034] As Figure 2 shown, the opposed limiting block 204 of the present invention can be considered to be supported by a rotating device. The rotating device is mainly composed of an inner fixing member 201, an outer fixing member 401, and a rotating member 301. In this embodiment, the rotating member used is a tapered roller bearing. The inner ring of the bearing is fitted with the inner fixing member 201, and the outer ring is fitted with the outer fixing member 401. Through the rotation of the rollers between the inner and outer rings, the relative rotation function between the inner fixing member 201 and the outer fixing member 401 is realized, thereby fully releasing the internal stress of the plastic-coated compensating chain.

[0035] The above is the specific description of the embodiments of the present invention, and it does not limit the above specific methods. Any technical solutions that adopt a way that is basically equivalent to this embodiment belong to the scope of the embodiments of the present invention.

Claims

1. An elevator compensation chain end connection device, including an elevator compensation chain, characterized in that: At least one link at the end of the elevator compensation chain is provided with a separable opposed limiting block (204); When the opposed limiting block (204) is in the closed state, it forms an upper mating surface and / or a lower mating surface that is in close contact with the end link; When the elevator compensation chain is adjusted, the opposed limiting block (204) can be separated under the action of the link pulling force and allow the link to be adjusted to pass through.

2. The elevator compensation chain end connection device according to claim 1, characterized in that: The opposed limiting block (204) realizes the closed state through the elastic force of a spring (203) supported behind each opposed limiting block (204).

3. The elevator compensation chain end connection device according to claim 1, characterized in that: When the opposed limiting block (204) is in the closed state, the upper mating surface (2042) or the lower mating surface (2043) that is in close contact with the end link is an arc-shaped groove (2041).

4. The elevator compensation chain end connection device according to claim 1, characterized in that: When the opposed limiting block (204) is in the closed state, the upper mating surface (2042) or the lower mating surface (2043) that is in close contact with the end link is an inclined surface groove (2044).

5. The elevator compensation chain end connection device according to claim 1, characterized in that: When the opposed limiting block (204) is in the closed state, the left and right sections of the upper mating surface (2042) or the lower mating surface (2043) that is in close contact with the end link are arc-shaped grooves (2041), and the raised end section (2045) is an inclined surface groove (2044).

6. The elevator compensation chain end connection device according to claim 1, characterized in that: At least 2 pairs of the opposed limiting blocks (204) are respectively clamped in the upper and lower two link rings at the end of the elevator compensation chain and are in a cross-perpendicular state.

7. The elevator compensation chain end connection device according to claim 2, characterized in that: The opposed limiting block (204) is supported on the inner fixing member (201) through a spring (203) and a damper (202).

8. The elevator compensation chain end connection device according to claim 7, wherein: The inner fixing member (201) is a cylinder, and it is rotatably supported on the outer fixing member (401) through a bearing (301).

9. The elevator compensation chain end connection device according to claim 7, characterized in that: The inner fixing member (201) is composed of a cylinder wall (2011) and a guiding fixing member (2012).

10. The elevator compensation chain end connection device according to claim 5, characterized in that: The acute angle of the raised end section is between 15 degrees and 20 degrees.

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