Non-backlash precision meshing gear

Abstract

The utility model discloses a backlash-free precise meshing gear which comprises a driving gear, a shaft sleeve is fixed in the driving gear, a key groove is formed in the inner side of the shaft sleeve, a groove is formed in the upper portion of the driving gear, a driven gear is installed on the upper portion of the driving gear, a convex ring is fixed below the driven gear, and the convex ring is connected with the shaft sleeve. An anti-backlash mechanism is arranged above the driving gear; according to the backlash-free precise meshing gear, the backlash eliminating mechanism is used in cooperation, in the transmission process, the driving gear and the driven gear can be connected through the positioning column and the fastening nut, and if the backlash is large, the driving gear and the driven gear are staggered, and therefore the backlash-free precise meshing gear is not damaged. The elastic blocks absorb impact and vibration in the gear transmission process, so that backlash can be reduced, friction and impact between gears are reduced in a gapless transmission mode, noise and vibration are effectively reduced, and the bearing capacity is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gears, in particular to a backlash-free precision meshing gear. Background Technique

[0002] A gear refers to a mechanical element with teeth on the rim that can continuously mesh to transmit motion and power. The application of gears in transmission appeared very early. The principle of generating cutting method and the successive emergence of special machine tools and tools for cutting teeth using this principle. With the development of production, the smooth operation of gears has been taken seriously. Gears are widely used transmission elements in mechanical equipment, and they transmit power and motion through the meshing of teeth.

[0003] During the transmission process of gears, a large backlash is likely to occur, which usually increases the impact during gear meshing, generates vibration and noise, and affects the stability and accuracy of the transmission system. Therefore, this application provides a backlash-free precision meshing gear to meet the requirements. Content of the Utility Model

[0004] The purpose of the utility model is to provide a backlash-free precision meshing gear to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A backlash-free precision meshing gear, including a driving gear, a bushing is fixed inside the driving gear, a keyway is opened on the inner side of the bushing, a groove is opened above the driving gear, a driven gear is installed above the driving gear, a convex ring is fixed below the driven gear, and a backlash elimination mechanism is arranged above the driving gear;

[0006] The backlash elimination mechanism includes a positioning column, a fastening nut, an adjustment groove and an elastic block. The positioning column is fixed above the driving gear, the fastening nut is sleeved above the positioning column, an adjustment groove is opened inside the driven gear, and the elastic block is installed inside the adjustment groove.

[0007] Preferably, the outer diameter of the bushing is in line with the inner diameter of the driven gear, and the bushing is used in cooperation with the keyway.

[0008] Preferably, the driven gear is snap-fitted with the driving gear through the convex ring, and the shape of the convex ring is in line with that of the groove.

[0009] Preferably, the upper part of the positioning column is thread-shaped, and the fastening nut is threadedly connected with the positioning column.

[0010] Preferably, the elastic blocks are annularly distributed inside the driven gear, and the elastic blocks are made of polyurethane material.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The non-backlash precision meshing gear, through the coordinated use of the backlash elimination mechanism, during the transmission process, the driving gear and the driven gear can be connected by the positioning column and the fastening nut. If there is a large backlash, the driving gear and the driven gear are misaligned with each other, and the elastic block absorbs the impact and vibration during the gear transmission process, thereby being able to reduce the backlash. The non-backlash transmission method reduces the friction and impact between the gears, effectively reduces the noise and vibration, and thus improves the load-bearing capacity;

[0013] 2. The non-backlash precision meshing gear, through the settings of the groove, the driven gear and the convex ring, inserts the convex ring of the driven gear into the groove of the driving gear, so that the driving gear and the driven gear can be closely fitted during the installation process, improving the precision of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the driving gear of the present utility model;

[0016] Figure 3 It is a schematic diagram of the structure of the driven gear of the present utility model;

[0017] Figure 4 It is a schematic diagram of the structure of the backlash elimination mechanism of the present utility model.

[0018] In the figure: 1, driving gear; 2, bushing; 3, keyway; 4, groove; 5, driven gear; 6, convex ring; 7, backlash elimination mechanism; 701, positioning column; 702, fastening nut; 703, adjustment groove; 704, elastic block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings 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 the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figures 1-3, the present utility model provides a technical solution: a backlash-free precision meshing gear, including a driving gear 1, a bushing 2 is fixed inside the driving gear 1, the outer diameter of the bushing 2 is consistent with the inner diameter of the driven gear 5, and the bushing 2 is used in cooperation with a keyway 3 to facilitate the installation of the bushing 2 on the central shaft. The connection method is relatively simple. A keyway 3 is provided on the inner side of the bushing 2, a groove 4 is provided above the driving gear 1, a driven gear 5 is installed above the driving gear 1, and the driven gear 5 is snap-connected to the driving gear 1 through a convex ring 6. The shape of the convex ring 6 is consistent with that of the groove 4. Insert the convex ring 6 of the driven gear 5 into the groove 4 of the driving gear 1, so that the driving gear 1 and the driven gear 5 can be closely attached during installation, improving the accuracy of the device. A convex ring 6 is fixed below the driven gear 5, and a backlash elimination mechanism 7 is provided above the driving gear 1;

[0021] Please refer to Figure 2 and Figure 4 , the backlash elimination mechanism 7 includes a positioning column 701, a fastening nut 702, an adjustment groove 703 and an elastic block 704. The positioning column 701 is fixed above the driving gear 1, and the upper part of the positioning column 701 is provided with a thread. The fastening nut 702 is threadedly connected to the positioning column 701. Insert the positioning column 701 into the adjustment groove 703 and screw on the fastening nut 702 to connect the driving gear 1 and the driven gear 5. The fastening nut 702 is sleeved on the upper part of the positioning column 701. An adjustment groove 703 is provided inside the driven gear 5, and an elastic block 704 is installed inside the adjustment groove 703. The elastic blocks 704 are annularly distributed inside the driven gear 5. The elastic block 704 is made of polyurethane material. If there is a large backlash, the driving gear 1 and the driven gear 5 are misaligned with each other, and the elastic block 704 absorbs the impact and vibration during the gear transmission process, thereby reducing the backlash. The backlash-free transmission method reduces the friction and impact between gears, effectively reducing noise and vibration, and thus improving the load-bearing capacity.

[0022] Working principle: When using this backlash-free precision meshing gear, first place it above the driving gear 1 so that the convex ring 6 is embedded into the groove 4. At the same time, insert the positioning column 701 into the adjustment groove 703 and screw on the fastening nut 702 to connect the driving gear 1 and the driven gear 5. Secondly, if there is a large backlash during the transmission process, the driving gear 1 and the driven gear 5 are misaligned with each other, and the elastic block 704 absorbs the impact and vibration during the gear transmission process, thereby reducing the backlash and reducing the friction and impact between gears. Just like this, the use process of this backlash-free precision meshing gear is completed.

[0023] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A backlash-free precision meshing gear, comprising a driving gear (1), characterized in that: A bushing (2) is fixed inside the driving gear (1). A keyway (3) is provided on the inner side of the bushing (2). A groove (4) is provided above the driving gear (1). A driven gear (5) is installed above the driving gear (1). A convex ring (6) is fixed below the driven gear (5). A backlash elimination mechanism (7) is provided above the driving gear (1). The backlash elimination mechanism (7) includes a positioning post (701), a fastening nut (702), an adjustment groove (703) and an elastic block (704). The positioning post (701) is fixed above the driving gear (1). The fastening nut (702) is sleeved on the upper part of the positioning post (701). An adjustment groove (703) is provided inside the driven gear (5). The elastic block (704) is installed inside the adjustment groove (703).

2. The backlash-free precision meshing gear according to claim 1, wherein, The outer diameter of the bushing (2) is in line with the inner diameter of the driven gear (5). The bushing (2) is used in cooperation with the keyway (3).

3. The backlash-free precision meshing gear according to claim 1, wherein The driven gear (5) is snap-connected to the driving gear (1) through the convex ring (6). The shape of the convex ring (6) is in line with that of the groove (4).

4. A backlash-free precision meshing gear according to claim 1, characterized in that, The upper part of the positioning post (701) is threaded. The fastening nut (702) is threadedly connected to the positioning post (701).

5. A backlash-free precision meshing gear according to claim 1, characterized in that, The elastic blocks (704) are annularly distributed inside the driven gear (5). The elastic blocks (704) are made of polyurethane material.

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