A pulley assembly and elevator door operator

Abstract

This utility model discloses a pulley assembly and an elevator door operator, belonging to the field of elevator door operators. The pulley assembly includes a pulley bracket and several pulley units spaced apart. Each pulley unit includes: a pulley shaft, one end of which is connected to the pulley bracket; a bearing, with its inner ring fitted around the pulley shaft; a pulley body fitted around the outer ring of the bearing, with at least two axial grooves and at least two radial grooves on both sides, the axial and radial grooves communicating with each other; and two cover plates, each cover plate having at least two locking blocks that sequentially engage with the axial and radial grooves. The technical advantage of this utility model lies in its excellent dustproof performance and convenient lubrication.

Description

Technical Field

[0001] This utility model relates to elevator door operators, and more particularly to a pulley assembly and an elevator door operator. Background Technology

[0002] An elevator door operator is a device used to drive and control the automatic opening and closing of elevator car doors (car doors) and landing doors (landing doors).

[0003] Pulley assemblies are an important component of elevator door operators, mainly used to enable the sliding of car doors and landing doors. However, the dustproof performance of these pulley assemblies is poor, and the lubrication is inconvenient, which can easily lead to a short service life. Utility Model Content

[0004] Purpose of the utility model: The purpose of this utility model is to provide a pulley assembly that not only has good dustproof performance but also good lubrication convenience; another purpose of this utility model is to provide an elevator door operator.

[0005] Technical solution: A pulley assembly includes a pulley bracket and a plurality of pulley units spaced apart, wherein the pulley unit includes: A pulley shaft, one end of which is connected to the pulley bracket; A bearing, wherein the inner ring of the bearing is fitted onto the outside of the pulley shaft; A pulley body fitted around the outer ring of the bearing, wherein both sides of the pulley body are provided with at least two axial grooves and at least two radial grooves, and the axial grooves and the radial grooves are connected. Two cover plates, each cover plate having at least two snap-fit ​​blocks, the snap-fit ​​blocks engaging sequentially with the axial groove and the radial groove.

[0006] Optional, also includes: At least two recesses are provided on the pulley body, and the recesses are connected to the radial groove; The protrusion is connected to the snap-fit ​​block, and the protrusion and the recess cooperate with each other.

[0007] Optionally, a transition ramp is provided between the recess and the radial groove.

[0008] Optionally, it may also include a friction part connected to the outside of the cover plate.

[0009] Optionally, the friction part includes a plurality of protrusions spaced apart outside the cover plate.

[0010] Optionally, the pulley shaft is provided with a shoulder, one end of which abuts against the pulley bracket, and the other end of which abuts against the inner ring of the bearing.

[0011] Optionally, the spacing between adjacent pulley units is equal.

[0012] An elevator door operator, including a pulley assembly.

[0013] Beneficial effects: When installing the cover plate, firstly, align the snap-fit ​​block with the axial groove, then rotate the cover plate to engage the snap-fit ​​block with the radial groove, thus completing the installation. When disassembling the cover plate, firstly, rotate the cover plate to separate the snap-fit ​​block from the radial groove, then move the cover plate to separate the snap-fit ​​block from the axial groove, thus completing the disassembly. The cover plate can be installed and removed without the need for additional tools. After the cover plate is removed, it is easy to lubricate the bearings, thus ensuring good lubrication convenience. At the same time, the cover plate has good dustproof performance during installation, resulting in a long service life for the pulley assembly of this solution. Attached Figure Description

[0014] Figure 1 This is a structural diagram of the pulley assembly of Embodiment 1 of this utility model; Figure 2 This is a structural diagram of the pulley unit of Embodiment 1 of this utility model; Figure 3 for Figure 2 A partial view of A in the middle; Figure 4 This is a structural diagram of the pulley body of Embodiment 1 of this utility model; Figure 5 This is a structural diagram of the cover plate of Embodiment 1 of this utility model; In the diagram: 1. Pulley bracket; 2. Pulley unit; 21. Pulley shaft; 211. Shaft shoulder; 22. Bearing; 23. Pulley body; 231. Axial groove; 232. Radial groove; 233. Recess; 234. Transition ramp; 24. Cover plate; 241. Snap-fit ​​block; 242. Protrusion; 243. Clearance hole; 244. Friction part; 2441. Raised strip; 3. Set screw. Detailed Implementation

[0015] To make the technical solution of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the utility model. Furthermore, it should be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. The terms "first," "second," etc., used in this utility model are provided for the convenience of describing the technical solution of this utility model and have no specific limiting effect; they are all general terms and do not constitute a limitation on the technical solution of this utility model. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not contradict or conflict, all of which are within the scope of protection claimed by this utility model.

[0017] Example 1 like Figures 1-3 This embodiment provides a pulley assembly, including a pulley bracket 1 and a plurality of pulley units 2 spaced apart. Each pulley unit 2 includes: a pulley shaft 21, one end of which is connected to the pulley bracket 1; a bearing 22, the inner ring of which is sleeved on the outside of the pulley shaft 21; a pulley body 23 sleeved on the outside of the outer ring of the bearing 22, with at least two axial grooves 231 and at least two radial grooves 232 on both sides of the pulley body 23, the axial grooves 231 and the radial grooves 232 communicating with each other; and two cover plates 24, each cover plate 24 having at least two locking blocks 241, the locking blocks 241 engaging with the axial grooves 231 and the radial grooves 232 in sequence.

[0018] Specifically, the pulley bracket 1 is used to connect to the elevator car door or landing door via the relevant set screws 3, facilitating the use of the pulley assembly in this solution to assist the sliding of the elevator car door or landing door; the pulley unit 2 provides support and guidance for the elevator car door or landing door, ensuring the smooth sliding of the elevator car door or landing door. The number of pulley units 2 is not limited and can be three, four, etc., preferably three; the pulley shaft 21 is supported by the pulley bracket 1 and is used to support the bearing 22; the bearing 22 facilitates the relative rotation of the pulley body 23 and the pulley shaft 21, and the type of bearing 22 can be a deep groove ball bearing, etc.; the pulley body 23 is used for sliding cooperation with the relevant track, and the material of the pulley body 23 can be nylon, rubber, etc., preferably nylon.

[0019] When installing the cover plate 24, firstly, engage the snap-fit ​​block 241 with the axial groove 231. Then, rotate the cover plate 24 to engage the snap-fit ​​block 241 with the radial groove 232, thus completing the installation. When disassembling the cover plate 24, firstly, rotate the cover plate 24 to separate the snap-fit ​​block 241 from the radial groove 232. Then, move the cover plate 24 to separate the snap-fit ​​block 241 from the axial groove 231, thus completing the disassembly. The cover plate 24 can be disassembled and assembled without the need for additional tools. After the cover plate 24 is disassembled, it is convenient to lubricate the bearing 22, thus ensuring good lubrication. At the same time, the cover plate 24 has good dustproof performance during installation, thus extending the service life of the pulley assembly of this solution. At least two axial grooves 231, at least two radial grooves 232 and at least two snap-fit ​​blocks 241 are provided to ensure good snap-fit ​​reliability and prevent the cover plate 24 and the pulley body 23 from separating from each other during synchronous sliding (when the pulley assembly of this solution is in the sliding working state). The cover plate 24 has a clearance hole 243 for avoiding the pulley shaft 21.

[0020] Furthermore, such as Figures 3-5 It also includes: at least two recesses 233 provided on the pulley body 23, the recesses 233 communicating with the radial groove 232; and a protrusion 242 connected to the snap-fit ​​block 241, the protrusion 242 cooperating with the recesses 233.

[0021] Specifically, the recessed portion 233 and the protruding portion 242 cooperate to further increase the reliability of the snap-fit ​​and prevent the cover plate 24 and the pulley body 23 from separating from each other during synchronous sliding. The specific shape of the protruding portion 242 should be smaller than a hemisphere to ensure the cooperation and separation of the recessed portion 233 and the protruding portion 242.

[0022] Furthermore, such as Figure 3 A transition ramp 234 is provided between the recess 233 and the radial groove 232.

[0023] Specifically, the transition slope 234 facilitates the separation of the recessed portion 233 and the protruding portion 242 under the action of external force, thereby facilitating the rotation of the cover plate 24 under the action of external force, and thus realizing the separation of the cover plate 24 and the pulley body 23.

[0024] Furthermore, such as Figure 5 It also includes a friction part 244 connected to the outside of the cover plate 24.

[0025] Specifically, the friction part 244 is designed to work with the operator's hand, so that the operator can rotate the cover plate 24 by hand without the need for additional tools, thereby facilitating the installation and removal of the cover plate 24.

[0026] Furthermore, such as Figure 5 The friction part 244 includes a plurality of protrusions 2441 spaced apart outside the cover plate 24.

[0027] Specifically, a number of protrusions 2441 facilitate the increase of friction between the operator and the cover plate 24. The number of protrusions 2441 is not limited, and the spacing between adjacent protrusions 2441 is preferably equal.

[0028] Furthermore, such as Figure 2 The pulley shaft 21 is provided with a shoulder 211. One end of the shoulder 211 abuts against the pulley bracket 1, and the other end of the shoulder 211 abuts against the inner ring of the bearing 22.

[0029] Specifically, the shoulder portion 211 is used to limit the movement of the pulley bracket 1 and the bearing 22.

[0030] Furthermore, such as Figure 1 The spacing between adjacent pulley units 2 is equal.

[0031] Specifically, equal spacing ensures good uniformity in the support and guidance of pulley unit 2.

[0032] This embodiment also provides an elevator door operator, including a pulley assembly of this embodiment.

[0033] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A pulley assembly, characterized in that, It includes a pulley bracket (1) and a plurality of pulley units (2) spaced apart, wherein the pulley unit (2) includes: A pulley shaft (21), one end of which is connected to the pulley bracket (1); Bearing (22), the inner ring of which is fitted onto the outside of the pulley shaft (21); A pulley body (23) is fitted onto the outer ring of the bearing (22). The pulley body (23) has at least two axial grooves (231) and at least two radial grooves (232) on both sides. The axial grooves (231) and the radial grooves (232) are connected. Two cover plates (24) are provided, and at least two snap-fit ​​blocks (241) are provided on the cover plates (24), and the snap-fit ​​blocks (241), the axial groove (231), and the radial groove (232) are sequentially engaged.

2. The pulley assembly according to claim 1, characterized in that, Also includes: At least two recesses (233) are provided on the pulley body (23), and the recesses (233) are connected to the radial groove (232); The protrusion (242) is connected to the snap-fit ​​block (241), and the protrusion (242) and the recess (233) cooperate.

3. A pulley assembly according to claim 2, characterized in that, There is a transition ramp (234) between the recess (233) and the radial groove (232).

4. A pulley assembly according to any one of claims 1-3, characterized in that, It also includes a friction part (244) connected to the outside of the cover plate (24).

5. A pulley assembly according to claim 4, characterized in that, The friction part (244) includes a plurality of protrusions (2441) spaced apart outside the cover plate (24).

6. A pulley assembly according to any one of claims 1-3, characterized in that, The pulley shaft (21) is provided with a shoulder (211), one end of which abuts against the pulley bracket (1), and the other end of which abuts against the inner ring of the bearing (22).

7. A pulley assembly according to any one of claims 1-3, characterized in that, The spacing between adjacent pulley units (2) is equal.

8. An elevator door operator, characterized in that, Includes a pulley assembly as described in any one of claims 1-7.

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