Synchronizing wheel

Abstract

The synchronizing wheel comprises a synchronizing wheel body, end side check rings, duplex check rings and a key-free expansion sleeve, the edges of the end faces of the two ends of the synchronizing wheel body are respectively provided with a circle of step, the end side check rings are riveted on the steps in a pressing mode, and a circle of groove is formed in the middle of the position, between the end side check rings, of the peripheral face of the synchronizing wheel body. A groove is formed in the synchronizing wheel body, a duplex check ring is embedded in the groove, the duplex check ring is composed of two semicircular ring pieces which are welded end to end to form an annular shape, counter bores are concentrically formed in the two ends of the synchronizing wheel body, and key-free expansion sleeves are arranged in the counter bores. By means of the mode, the synchronizing wheel is provided, double rows of belt wheel tooth faces are constructed through the duplex check rings and the end side check rings as tooth faces so as to synchronize two paths of synchronous belts, the synchronizing wheel is connected with an optical shaft through the key-free expansion sleeve, therefore, torque load is greatly improved, transmission precision is effectively improved, structural redundancy is remarkably reduced, and the synchronizing wheel is simple in structure, convenient to operate and low in cost. Installation and maintenance are convenient.

Description

Technical Field

[0001] The utility model relates to the field of transmission devices, in particular to a synchronous pulley. Background Art

[0002] The synchronous pulley combination generally relies on the tooth profile meshing method to convey articles and transmit torque. In the prior art, on the one hand, the optical axis cooperating with the synchronous pulley generally needs to be machined with a keyway to transmit torque; on the other hand, the optical axis cooperating with the synchronous pulley generally needs to be machined with a positioning step or use a circlip to achieve precise installation and positioning. However, machining the keyway and the positioning step will reduce the torque load capacity of the optical axis, and the use of the circlip also has problems of wear and accuracy. In addition, if two synchronous pulleys are to be installed on the same optical axis respectively, the synchronism may not be guaranteed, resulting in a reduction in transmission accuracy. Summary of the Utility Model

[0003] The main technical problem to be solved by the utility model is to provide a synchronous pulley, which constructs a double-row pulley tooth surface for the tooth surface through a double-link retaining ring and an end-side retaining ring to synchronize two synchronous belts, and uses a keyless expansion sleeve for the synchronous pulley to connect the optical axis, thereby greatly improving the torque load, effectively improving the transmission accuracy, significantly reducing the structural redundancy, having a simple structure and being convenient for installation and maintenance.

[0004] To solve the above technical problem, a technical solution adopted by the utility model is: to provide a synchronous pulley, including a synchronous pulley body, an end-side retaining ring, a double-link retaining ring, and a keyless expansion sleeve. A circle of steps is arranged at the edge of each end face of the synchronous pulley body, and the end-side retaining ring is riveted on the steps. A circle of grooves is centrally opened on the outer peripheral surface of the synchronous pulley body between the end-side retaining rings, and the double-link retaining ring is embedded in the grooves. The double-link retaining ring is composed of two semi-circular ring pieces welded end to end to form a ring. Counterbores are concentrically opened at both ends of the synchronous pulley body, and the keyless expansion sleeve is arranged in the counterbores.

[0005] In a preferred embodiment of the utility model, the steps and the grooves have the same diameter, and the double-link retaining ring and the end-side retaining ring both have the same inner diameter and outer diameter.

[0006] In a preferred embodiment of the utility model, the outer peripheral surface of the synchronous pulley body has a tooth surface, and the double-link retaining ring equally divides the tooth surface.

[0007] In a preferred embodiment of the utility model, the end-side retaining ring is in a circular ring shape, and the thickness does not exceed the height of the steps.

[0008] In a preferred embodiment of the utility model, both sides of the double-link retaining ring are in seamless close contact with the side walls of the tooth surface at the grooves.

[0009] In a preferred embodiment of the present utility model, the outer diameters of the double-ring retaining ring and the end-side retaining ring are greater than the maximum diameter of the tooth surface.

[0010] The beneficial effects of the present utility model are as follows: A synchronous pulley provided by the present utility model constructs a double-row pulley tooth surface for the tooth surface through a double-ring retaining ring and an end-side retaining ring to synchronize two synchronous belts, and connects the synchronous pulley to a smooth shaft through a keyless expansion sleeve, thereby greatly improving the torque load, effectively improving the transmission accuracy, significantly reducing the structural redundancy, having a simple structure, and being convenient for installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings, where:

[0012] Figure 1 is an overall structure diagram of a synchronous pulley of the present utility model;

[0013] Figure 2 is an exploded structure diagram of a synchronous pulley of the present utility model;

[0014] Figure 3 is a sectional structure diagram of a synchronous pulley of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0016] As Figures 1 - 3 shown, the embodiments of the present utility model include:

[0017] A synchronous pulley, including a synchronous pulley main body 1, an end-side retaining ring 2, a double-ring retaining ring 3, and a keyless expansion sleeve 4. A ring of steps 5 is provided at the edge of each end face of the synchronous pulley main body 1. The end-side retaining ring 2 is riveted on the steps 5. A ring of grooves 6 is centrally opened on the outer peripheral surface of the synchronous pulley main body 1 between the end-side retaining rings 2. The double-ring retaining ring 3 is embedded in the grooves 6. The double-ring retaining ring 3 is composed of two semi-circular ring pieces welded end to end to form a ring. Counterbores 7 are concentrically opened at both ends of the synchronous pulley main body 1, and the keyless expansion sleeve 4 is arranged in the counterbores 7.

[0018] Among them, the step 5 and the groove 6 have the same diameter, and both the double-joint retaining ring 3 and the end-side retaining ring 2 have the same inner diameter and outer diameter.

[0019] Furthermore, the outer peripheral surface of the synchronous pulley body 1 has a tooth surface 8, and the double-joint retaining ring 3 equally divides the tooth surface 8.

[0020] Furthermore, the end-side retaining ring 2 is in a circular ring shape, and its thickness does not exceed the height of the step 5.

[0021] Furthermore, both sides of the double-joint retaining ring 3 are in seamless close fit with the side walls of the tooth surface 8 at the groove 6.

[0022] Furthermore, the outer diameters of the double-joint retaining ring 3 and the end-side retaining ring 2 are greater than the maximum diameter of the tooth surface 8.

[0023] The manufacturing of this product is realized through the following process: After machining the synchronous pulley body 1, a groove 6 is milled in the middle thereof. After splicing two double-joint retaining rings 3, they are inlaid into the groove 6, and then the two double-joint retaining rings 3 are welded to form an annular partition, and a transmission link for two synchronous belts is established on the tooth surface 8. Then, the end-side retaining rings 2 are riveted and pressed at both ends of the synchronous pulley body 1 to fix them to the synchronous pulley body 1. Finally, the keyless expansion sleeve 4 is installed into the counterbore 7.

[0024] This product uses the tensioning method of the keyless expansion sleeve 4 to replace the machining of the keyway to realize the installation of the synchronous pulley. The keyless expansion sleeve 4 can be used to connect the synchronous pulley and the optical shaft, thereby significantly improving the torque load capacity of the optical shaft. The expansion sleeve tensioning can also achieve the positioning purpose, and can be freely adjusted according to the installation needs, without machining a positioning step 5 on the shaft or installing a positioning structure such as a circlip on the shaft, thereby simplifying the component structure and improving the positioning accuracy at the same time.

[0025] In addition, in order to achieve the purpose of double-wheel synchronization on the same optical shaft, after machining the synchronous pulley body 1 of this product, the tooth surface 8 is equally divided by the double-joint retaining ring 3 to form two synchronous transmission paths, which can be achieved with only one installation. This can ensure the synchronization of the two transmission paths on the synchronous pulley, improve the transmission accuracy, and reduce the installation steps.

[0026] To sum up, the present utility model provides a synchronous pulley, which constructs a double-row pulley tooth surface 8 for the tooth surface 8 through the double-joint retaining ring 3 and the end-side retaining ring 2 to synchronize two synchronous belts, and connects the synchronous pulley to the optical shaft through the keyless expansion sleeve 4, thereby greatly improving the torque load, effectively improving the transmission accuracy, significantly reducing the structural redundancy, with a simple structure and convenient installation and maintenance.

[0027] The above are only embodiments of the present utility model, and do not thus limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification of the present utility model, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present utility model.

Claims

1. A synchronous pulley, characterized in that, It includes a synchronous pulley body, end-side retaining rings, double retaining rings, and keyless expansion sleeves. At both ends of the synchronous pulley body, there is a ring of steps on the edge of the end face. The end-side retaining rings are riveted on the steps. A ring of grooves is centered between the end-side retaining rings on the outer peripheral surface of the synchronous pulley body. The double retaining rings are embedded in the grooves. The double retaining rings are composed of two semi-circular ring pieces that are welded end to end to form a ring. Counterbores are concentrically provided at both ends of the synchronous pulley body, and keyless expansion sleeves are arranged in the counterbores.

2. The synchronous pulley according to claim 1, wherein, The steps and the grooves have the same diameter, and the double retaining rings and the end-side retaining rings both have the same inner diameter and outer diameter.

3. The synchronous pulley according to claim 1, wherein The outer peripheral surface of the synchronous pulley body has a tooth surface, and the double retaining rings equally divide the tooth surface.

4. The synchronous pulley according to claim 1, characterized in that, The end-side retaining rings are in the shape of a ring, and the thickness does not exceed the height of the steps.

5. The synchronous pulley according to claim 3, wherein Both sides of the double retaining rings are in seamless close contact with the side walls of the tooth surface at the grooves.

6. The synchronous pulley according to claim 3, wherein, The outer diameters of the double retaining rings and the end-side retaining rings are greater than the maximum diameter of the tooth surface.

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