CN-122009941-A - Elevator door change gear and forming process thereof

CN122009941ACN 122009941 ACN122009941 ACN 122009941ACN-122009941-A

Abstract

The application relates to the technical field of elevator components, in particular to an elevator door change gear and a forming process thereof, comprising a change gear body, wherein the change gear body comprises a bearing, a framework and a flexible wear-resistant noise reduction piece, the framework is provided with a central hole, the bearing is arranged in the central hole, a first annular groove is arranged on the outer side of the framework, the flexible wear-resistant noise reduction piece is arranged in the first annular groove, a second annular groove is arranged on the outer side wall of the flexible wear-resistant noise reduction piece, the flexible wear-resistant noise reduction piece is made of polyurethane, and the framework is made of nylon.

Inventors

CHEN SONGYAO
CHEN GUANGLIANG

Assignees

宁波鑫轮机械科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260203

Claims (9)

1. The elevator door change gear is characterized by comprising The gear body comprises a bearing, a framework and a flexible wear-resistant noise reduction piece, wherein the framework is provided with a central hole, the bearing is arranged in the central hole, a first annular groove is formed in the outer side of the framework, the flexible wear-resistant noise reduction piece is arranged in the first annular groove, a second annular groove is formed in the outer side wall of the flexible wear-resistant noise reduction piece, polyurethane is used as the material of the flexible wear-resistant noise reduction piece, and nylon is used as the material of the framework.
2. The elevator door change gear of claim 1, wherein the number of the skeleton and the flexible wear-resistant noise reduction pieces is one, the flexible wear-resistant noise reduction pieces are injection molded, and the bearing, the skeleton and the flexible wear-resistant noise reduction pieces are injection molded as a whole.
3. The elevator door change gear according to claim 1, wherein the skeleton comprises a first skeleton body, a plurality of second skeleton bodies and a blocking skeleton body, the flexible wear-resistant noise reduction piece comprises two first buffer rings and second buffer rings, the first skeleton body is provided with a plurality of first sliding grooves and first annular grooves which are arranged in an annular array, one end of each first sliding groove is provided with an opening, the blocking skeleton body is detachably connected with the first skeleton body and seals the opening, two first buffer rings are arranged in the first annular grooves, the two first buffer rings are oppositely arranged, the two first buffer rings are provided with the second annular grooves, the outer side wall of each second skeleton body is provided with a third annular groove, the second buffer rings are arranged in the third annular grooves, and when the second skeleton body slides in the first sliding grooves, the middle section or the end part of each second buffer ring is positioned between the two first buffer rings.
4. The elevator door change gear according to claim 3, wherein the elevator door change gear further comprises a fixing rod, a sliding sleeve, a rotation following piece and a clutch structure, the fixing rod penetrates through the bearing, the sliding sleeve is arranged on the fixing rod in a sliding manner along the axial direction of the fixing rod, the rotation following piece is connected with the first bone body through the clutch structure, when the first bone body rotates circumferentially, the rotation following piece is in threaded connection with the sliding sleeve, one end of the sliding sleeve is provided with a fourth annular groove, the end part of the second bone body is provided with a first extending end, and the first extending end extends out of the first sliding groove and into the fourth annular groove.
5. The elevator door change gear according to claim 4, wherein the clutch structure comprises an armature member and an electromagnet, the elevator door change gear further comprises two fixing frames, the two fixing frames are respectively located at two ends of the fixing rod and fixedly connected with the fixing rod, a second sliding groove is formed in one end, away from the blocking bone, of the blocking bone and the first bone, the armature member is slidably arranged in the second sliding groove, the armature member is provided with a first limiting groove with a notch, the follower is provided with a second extending end, one ends, with the second sliding groove, of the blocking bone and the first bone are respectively provided with a third extending end, the second extending end and the third extending end are respectively extended into the first limiting groove, the thickness of the third extending end is larger than that of the second extending end, the electromagnet is arranged on the fixing frame and is close to the armature member, and when the electromagnet is electrified, the armature member moves towards the electromagnet and enables the second extending end to be still located in the first limiting groove.
6. The elevator door change gear according to claim 5, wherein the clutch structure further comprises an elastic restoring member, one end of the elastic restoring member is connected with the armature member, and the other end of the elastic restoring member is connected with the blocking bone or the first bone.
7. The elevator door change gear according to claim 6, wherein the fixed rod is provided with a limit switch, and both ends of the sliding sleeve are provided with the limit switch.
8. A molding process of an elevator door change gear is used for molding the elevator door change gear according to claim 2, and is characterized in that firstly, molten plastics made of polyurethane are injected into a mold by an injection molding machine and are injection molded into the flexible wear-resistant noise reduction piece, then the bearing and the flexible wear-resistant noise reduction piece are placed into another mold, and molten plastics made of nylon are injected into the mold and are injection molded into the change gear body.
9. The process for forming the elevator door change gear according to claim 8, wherein when molten plastics made of nylon are injected into the mold, the mold temperature of the injection molding machine is 80-120 ℃, the drying temperature is 80-120 ℃, the drying time of the dehumidifying and drying agent is 4-6 hours, the injection molding temperature of the nozzle is 270-290 ℃, the injection molding front section temperature is 270-280 ℃, the injection molding middle section temperature is 260-270 ℃, and the injection molding rear section temperature is 240-250 ℃.

Description

Elevator door change gear and forming process thereof Technical Field The application relates to the technical field of elevator components, in particular to an elevator door change gear and a forming process thereof. Background The household elevator is small lifting equipment specially designed for private residence environment and used for family members to pass through different floors in the residence, and comprises a change gear, wherein the change gear is a wheel body structure matched with an elevator door guide rail, and the elevator door change gear is always in friction contact with the door guide rail in the process of unfolding and closing the elevator door. The existing elevator door change gear comprises a change gear body, wherein the change gear body comprises a bearing and a framework, the framework is provided with a central hole and an annular groove, and the bearing is arranged in the central hole. When in use, the outer door guide rail extends into the annular groove and contacts the groove wall of the annular groove. The framework is made of nylon. However, in actual use, the outer door rail is noisier when in contact with the groove wall of the annular groove and is more subject to wear due to the complete hard contact. There is therefore a need to provide a door change gear for elevators with longer service life and less noise and a process for forming the same. Disclosure of Invention The application mainly aims to provide an elevator door change gear, wherein the elevator door change gear comprises a change gear body, the change gear body comprises a bearing, a framework and a flexible wear-resistant noise reduction piece, the framework is provided with a central hole, the bearing is arranged in the central hole, a first annular groove is formed in the outer side of the framework, the flexible wear-resistant noise reduction piece is arranged in the first annular groove, a second annular groove is formed in the outer side wall of the flexible wear-resistant noise reduction piece, the flexible wear-resistant noise reduction piece is made of polyurethane, and the framework is made of nylon. The application further aims to provide an elevator door change gear, wherein the number of the framework and the number of the flexible wear-resistant noise reduction pieces are one, the flexible wear-resistant noise reduction pieces are formed by injection molding, and the bearing, the framework and the flexible wear-resistant noise reduction pieces are formed by injection molding into a whole, so that the change gear body is formed. The application further aims to provide an elevator door change gear, wherein the framework comprises a first framework body, a plurality of second framework bodies and a blocking framework body, the flexible wear-resistant noise reduction piece comprises two first buffer rings and second buffer rings, the first framework body is provided with a plurality of first sliding grooves and first annular grooves which are arranged in an annular array, one second framework body is slidably arranged in each first sliding groove, one end of each first sliding groove is provided with an opening, the blocking framework body is detachably connected with the first framework body and seals the opening, two first buffer rings are arranged in each first annular groove, the two first buffer rings are oppositely arranged, the two first buffer rings are provided with the second annular grooves, the outer side wall of each second framework body is provided with a third annular groove, when the second framework body slides in each first sliding groove, the second buffer rings or the end parts of the second buffer rings are positioned between the two first buffer rings, and the second annular grooves can always rotate, and the service life of the elevator door change gear is further prolonged. The application further aims to provide a forming process of the elevator door change gear, wherein the process is used for forming the elevator door change gear and is characterized in that molten plastics made of polyurethane are firstly injected into a mold by an injection molding machine and are injection molded into the flexible wear-resistant noise reduction piece, then the bearing and the flexible wear-resistant noise reduction piece are placed in another mold, and molten plastics made of nylon are injected into the mold and are injection molded into the change gear body. In order to achieve at least one of the above objects, the present application provides an elevator door gear, wherein the elevator door gear comprises: The gear body comprises a bearing, a framework and a flexible wear-resistant noise reduction piece, wherein the framework is provided with a central hole, the bearing is arranged in the central hole, a first annular groove is formed in the outer side of the framework, the flexible wear-resistant noise reduction piece is arranged in the first annular groove, a second annular