A pressing die for escalator chain step links

Abstract

The present invention discloses a press-fitting die for step links of escalator chains, comprising a spring base, a first positioning device and a second positioning device, wherein the first positioning device is fixed on the spring base for horizontally positioning and supporting the step outer chain plate, the spring base is provided with an elastic element, the second positioning device is movably connected to the spring base and elastically supported by the elastic element, a through hole is preset on the shaft body of the step pin, the second positioning device is used to vertically position and support the step pin and keep the axis of the through hole and the axis of the step outer chain plate in the length direction at a predetermined parallelism, the crimping end on the upper side of the step pin is higher than the second positioning device, the press-fitting end on the lower side of the step pin is located above the plate hole, the press machine applies force to press down the crimping end, the step pin and the second positioning device are synchronously limited and moved downward, and the press-fitting end is aligned with the plate hole and press-fitted into one body. The press-fitting die effectively improves the parallelism accuracy of the press-fit step pin hole and the chain plate, and improves and stabilizes the product quality.

Description

Technical Field

[0001] The invention relates to the technical field of chain press-fitting dies, in particular to a press-fitting die for escalator chain step links. Background Art

[0002] Escalator chains are widely used in escalators for lifting or conveying. Step chain links can be divided into step pin with hole structure and non-hole structure. For the structure with hole, it is necessary to ensure the parallelism between the axis of the step pin hole and the axis of the length direction of the step outer chain plate. Usually, for the press-fitting of the structure with hole, a mandrel is first used to manually pass through the step pin, and then the mandrel is manually removed to achieve the positioning of the step pin, and then the press-fitting is performed by a hydraulic press. Due to the manual removal of the mandrel, the labor intensity is high, and the step pin will have a certain impact when it is removed. The precision of the pressed product is poor, and the mandrel is long and easy to bend during long-term press-fitting, which will also reduce the press-fitting accuracy. Therefore, it is necessary to propose a new technical solution to improve the parallel accuracy of the press-fit step pin hole and the chain plate and reduce labor intensity. Summary of the invention

[0003] The present invention aims to solve the technical problem of providing a press-fit die for escalator chain step links with reasonable structure and high precision, which can effectively improve the parallel accuracy between the press-fit step pin shaft hole and the chain plate and reduce labor intensity.

[0004] The present invention solves the above technical problems through the following technical solutions.

[0005] The camshaft is an angularly-shaped member which is adapted to move relative to the first and second camshafts, wherein the first and second camshafts are configured to move relative to each other to form a rotational movement of the camshaft.

[0006] Preferably, the first positioning device includes a positioning plate and a positioning bolt, the positioning plate is fixed on the spring base, the positioning plate is provided with a positioning groove for embedding the step outer chain plate, the plate hole is located in the positioning groove, the pin shaft is located on the outside of the positioning plate, and the positioning bolt is threadedly connected to the positioning plate for limiting the pin shaft.

[0007] Preferably, the second positioning device includes a core rod positioning plate, a movable positioning core, a magnet and a core rod, the lower end of the movable positioning core is movably connected to the spring base and elastically supported by the elastic element, the upper end of the movable positioning core is fixedly connected to the core rod positioning plate, the magnet used for magnetically adsorbing the step pin is fixed on the core rod positioning plate, and the core rod that cooperates with the through hole to position and support the step pin is fixed on the core rod positioning plate.

[0008] Preferably, the elastic element is a compression spring, the spring base is provided with a spring groove for installing the compression spring, and the lower end of the movable positioning core is movably connected in the spring groove and elastically supported by the compression spring.

[0009] Preferably, the core rod positioning plate is provided with an arc groove matching with the step pin shaft, and the magnetic steel and the core rod are fixed on the arc groove.

[0010] In summary, the escalator chain step link press-fitting die of the present invention has a simple structure, convenient operation, high work efficiency, and low labor intensity for employees. It effectively improves the parallel accuracy between the axis of the preset through hole of the step pin shaft and the axis in the length direction of the step outer link plate, and stably improves the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The following drawings are intended to facilitate the description of preferred embodiments and are not intended to limit the scope of protection of the present invention.

[0012] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0013] Figure 2 is a schematic diagram of the main structure of an embodiment of the present invention;

[0014] Figure 3 2 is a schematic diagram of a top view of the structure of an embodiment of the present invention.

[0015] In the figure: 1-core rod positioning plate, 2-movable positioning core, 3-core rod, 4-step pin, 5-bolt, 6-positioning plate, 7-step outer chain plate, 8-spring base, 9-positioning bolt, 10-pin, 11-compression spring, 12-magnetic steel. DETAILED DESCRIPTION

[0016] In order to facilitate the understanding of the present invention, the present invention is described in detail below in conjunction with the preferred embodiments of the present invention given in the accompanying drawings.

[0017] like Figures 1 to 3 As shown, a press-fitting die for step chain links of an escalator chain of the present invention comprises a spring base 8, a first positioning device and a second positioning device. The first positioning device is fixed on the spring base 8 for horizontally positioning and supporting the step outer link plate 7, one end of the step outer link plate 7 is provided with a plate hole, and the other end of the step outer link plate 7 is provided with a pin 10. The spring base is provided with an elastic element, and the second positioning device is movably connected to the spring base and elastically supported by the elastic element. Under the support of the elastic force, the second positioning device obtains an initial position in a non-working state so as to facilitate the installation of the step pin 4, and the press-fitting end of the lower side of the step pin 4 is located above the plate hole. A through hole is preset on the shaft body of the step pin 4, and the second positioning device is used to vertically position and support the step pin 4 so that the axis of the through hole maintains a predetermined parallelism with the axis of the length direction of the step outer link plate 7, which helps to improve the press-fitting accuracy. The crimping end on the upper side of the step pin 4 is higher than the second positioning device, so that when the press presses down, the force is applied to the crimping end and the second positioning device will not be touched. During press-fitting, the press machine applies force to press down the crimping end, the step pin 4 and the second positioning device move downward synchronously, and the press-fitting end is aligned with the plate hole and press-fitted into one piece.

[0018] In a specific embodiment, the first positioning device includes a positioning plate 6 and a positioning bolt 9, and the positioning plate 6 is fixed to the spring base 8 by bolts 5. The positioning plate 6 is provided with a positioning groove for embedding the step outer link plate 7, so that the plate hole is located in the positioning groove, the pin 10 is located on the outside of the positioning plate 6, and the positioning bolt 9 is threadedly connected to the positioning plate 6 for limiting the pin 10. The position of the positioning bolt 9 can be pre-adjusted by screwing, and when the step outer link plate 7 is placed on the positioning groove, the position of the plate hole is positioned by the pin 10 against the positioning bolt 9.

[0019] In a specific embodiment, the second positioning device includes a core rod positioning plate 1, a movable positioning core 2, a magnetic steel 12 and a core rod 3. The lower end of the movable positioning core 2 is movably connected to the spring base 8 and is elastically supported by the elastic element. Specifically, the elastic element is a compression spring 11, and the spring base 8 is provided with a spring groove for installing the compression spring 11. The lower end of the movable positioning core 2 is movably connected in the spring groove and is elastically supported by the compression spring 11. The upper end of the movable positioning core 2 is fixed to the core rod positioning plate 1, and the magnetic steel 12 for magnetically adsorbing the step pin 4 is fixed on the core rod positioning plate 1. The core rod 3 that cooperates with the through hole to position and support the step pin 4 is fixed on the core rod positioning plate 1. Such a positioning support structure can ensure the parallel accuracy of the through hole axis and the length direction axis of the step outer chain plate 7, and improve the press-fitting quality. Furthermore, the core rod positioning plate 1 is provided with an arc groove matched with the step pin 4, which is beneficial to limit the step pin 4, and the magnetic steel 12 and the core rod 3 are fixed on the arc groove.

[0020] Working process of the present invention:

[0021] During the press-fitting process, first use the positioning bolts 9 and the positioning plate 6 to position the step outer chain plate 7 in the mold; secondly, the step pin 4 is positioned in the mold through the core rod 3, the magnetic steel 12 and the core rod positioning plate 1; the mold is pushed into the hydraulic press, and the hydraulic press moves downward to drive the step pin 4, the core rod positioning plate 1, and the movable positioning core 2 to move downward to the specified height, and the compression spring 11 is compressed accordingly, and the step pin 4 and the step outer chain plate 7 are pressed into one piece; when the hydraulic press moves upward, the compression spring 11 rebounds, and the pressed-fit integrated component assembled with the step outer chain plate 7, the pin 10, and the step pin 4 moves upward accordingly, and the operator holds the chain plate to remove the pressed-fit integrated component to complete the processing.

[0022] The technical terms used in the present invention are only for the convenience of description and do not constitute a limitation of the present invention. The present invention is not limited to the preferred implementation modes described above, but various deformation and modified implementation modes based on the known technologies known to technicians in this technical field or the equivalent replacement of the prior art, which are based on the spirit or technical conception of the present invention, should be included in the protection scope of the present invention.

Claims

1. A press-fitting die for escalator chain step links, characterized by: The invention comprises a spring base, a first positioning device and a second positioning device, wherein the first positioning device is fixed on the spring base and used for horizontally positioning and supporting the step outer link plate, one end of the step outer link plate is provided with a plate hole, and the other end of the step outer link plate is provided with a pin shaft, the spring base is provided with an elastic element, the second positioning device is movably connected to the spring base and is elastically supported by the elastic element, a through hole is preset on the shaft body of the step pin shaft, the second positioning device is used for vertically positioning and supporting the step pin shaft and making the axis of the through hole maintain a predetermined parallelism with the axis of the length direction of the step outer link plate, the crimping end on the upper side of the step pin shaft is higher than the second positioning device, and the pressing end on the lower side of the step pin shaft is located above the plate hole. During pressing, the press applies force to press down the crimping end, the step pin shaft and the second positioning device are synchronously limited and moved downward, and the pressing end is aligned with the plate hole and pressed into one body; The first positioning device includes a positioning plate and a positioning bolt, the positioning plate is fixed on the spring base, the positioning plate is provided with a positioning groove for embedding the step outer chain plate, so that the plate hole is located in the positioning groove, the pin shaft is located on the outside of the positioning plate, and the positioning bolt is threadedly connected to the positioning plate for limiting the pin shaft; The second positioning device comprises a core rod positioning plate, a movable positioning core, a magnetic steel and a core rod, the lower end of the movable positioning core is movably connected to the spring base and elastically supported by the elastic element, the upper end of the movable positioning core is fixedly connected to the core rod positioning plate, the magnetic steel used for magnetically adsorbing the step pin is fixed on the core rod positioning plate, and the core rod that cooperates with the through hole to position and support the step pin is fixed on the core rod positioning plate; The elastic element is a compression spring, the spring base is provided with a spring groove for installing the compression spring, the lower end of the movable positioning core is movably connected in the spring groove and is elastically supported by the compression spring; The core rod positioning plate is provided with an arc groove matched with the step pin shaft, and the magnetic steel and the core rod are fixed on the arc groove.

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