Worm gear anti-backlash structure

Abstract

The utility model discloses a worm gear gap eliminating structure, include: base, worm wheel, double lead worm, pulley, first locking nut, first bearing, first spacer sleeve, first sealing washer, first skeleton oil seal, disc spring, second locking nut, second bearing, long spacer sleeve, adjusting spacer sleeve, second spacer sleeve, second sealing washer and second skeleton oil seal, the fixed mounting of base has worm wheel, and the top of worm wheel is provided with double lead worm, the both sides of double lead worm are provided with pulley and disc spring respectively, the double lead worm of pulley one side is provided with first locking nut, first bearing, first spacer sleeve, first sealing washer and first skeleton oil seal in proper order, the double lead worm of disc spring one side is provided with second locking nut, second bearing, long spacer sleeve, adjusting spacer sleeve, second spacer sleeve, second sealing washer and second skeleton oil seal in proper order, the utility model discloses a gap eliminating structure can reduce the worm gear clearance, improve worm wheel worm rotation accuracy, simple and reliable structure, convenient installation.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical equipment, and specifically relates to a worm gear backlash elimination structure. Background Technology

[0002] There are two existing worm gear backlash elimination structures: 1. Backlash elimination using a double worm gear; 2. Adjusting the worm gear backlash by adjusting the bearing sleeve position using a double-lead worm gear. These backlash elimination structures utilize a preset design clearance to compensate for the backlash between the worm gear and worm, thereby improving the accuracy and efficiency of the transmission system. However, they cannot correct for changes in the backlash between the worm gear and worm in real time, leading to a problem where the backlash continuously increases with wear during long-term operation of the worm gear. Utility Model Content

[0003] Purpose of the utility model: In order to overcome the shortcomings of the prior art, this utility model provides a worm gear backlash elimination structure, which can reduce the worm gear backlash, improve the rotation accuracy of the worm gear, has a simple and reliable structure, is easy to install, and ensures that the worktable is stable and reliable during rotation.

[0004] Technical solution: A worm gear backlash elimination structure, comprising: a base, a worm gear, a double-lead worm, a pulley, a first locking nut, a first bearing, a first spacer, a first sealing ring, a first skeleton oil seal, a disc spring, a second locking nut, a second bearing, a long spacer, an adjusting spacer, a second spacer, a second sealing ring, and a second skeleton oil seal;

[0005] A worm gear is fixedly installed on the base, and a double-lead worm is provided above the worm gear; a pulley and a disc spring are respectively provided on both sides of the double-lead worm.

[0006] The double-lead worm gear on one side of the pulley is sequentially provided with a first locking nut, a first bearing, a first spacer, a first sealing ring, and a first skeleton oil seal;

[0007] The disc spring is provided with a second locking nut, a second bearing, a long spacer, an adjusting spacer, a second spacer, a second sealing ring, and a second skeleton oil seal on one side of the double-lead worm gear.

[0008] As an optimization, the gear on the double-lead worm gear meshes with the gear on the worm wheel.

[0009] As an optimization: the aforementioned adjusting spacer, disc spring, and long spacer are assembled and then fitted into the double-lead worm gear as a whole.

[0010] As an optimization: by adjusting the positions of the first and second locking nuts on both sides, the backlash of the worm gear and the double-lead worm is reduced to 0.

[0011] Beneficial effects: The worm bearing preload of the worm gear backlash elimination structure of this utility model is constant pressure preload, and the worm gear backlash can be adjusted to 0. When the worm gear rotates, the worm overcomes the spring force of the disc spring, and the worm gear backlash increases slightly. At this time, a smaller worm gear backlash is obtained, and the worm gear rotates, thereby improving the rotation accuracy of the worm gear. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0013] Example

[0014] like Figure 1 As shown, a worm gear backlash elimination structure includes: a base 1, a worm gear 2, a double-lead worm gear 3, a pulley 4, a first locking nut 5, a first bearing 6, a first spacer 7, a first sealing ring 8, a first skeleton oil seal 9, a disc spring 10, a second locking nut 11, a second bearing 12, a long spacer 13, an adjusting spacer 14, a second spacer 15, a second sealing ring 16, and a second skeleton oil seal 17.

[0015] A worm gear 2 is fixedly mounted on the base 1, and a double-lead worm 3 is arranged above the worm gear 2. The gear on the double-lead worm 3 meshes with the gear on the worm gear 2. A pulley 4 and a disc spring 10 are respectively arranged on both sides of the double-lead worm 3.

[0016] On one side of the pulley 4, the double-lead worm gear 3 is sequentially provided with a first locking nut 5, a first bearing 6, a first spacer 7, a first sealing ring 8, and a first skeleton oil seal 9. On the other side of the disc spring 10, the double-lead worm gear 3 is sequentially provided with a second locking nut 11, a second bearing 12, a long spacer 13, an adjusting spacer 14, a second spacer 15, a second sealing ring 16, and a second skeleton oil seal 17.

[0017] When installing the worm gear backlash elimination structure in this embodiment, firstly, install the first spacer 7, first sealing ring 8, first bearing 6, and first locking nut 5 on one side of the pulley 4 onto the double-lead worm gear 3 in sequence; then install the double-lead worm gear 3 into the base 1; next, install the second spacer 15, second sealing ring 16, and second skeleton oil seal 17 on one side of the disc spring 10 into the double-lead worm gear 3; install the second bearing 12 on one side of the disc spring 10 into the double-lead worm gear 3; then assemble the adjusting spacer 14, disc spring 10, and long spacer 13 and then fit them onto the double-lead worm gear 3 as a whole; finally, install the second locking nut 11 on one side of the disc spring 10, adjust the positions of the first locking nuts 5 and the second locking nuts 11 on both sides so that the backlash between the worm gear 2 and the double-lead worm gear 3 is 0, then lock the first locking nuts 5 and the second locking nuts 11 on both sides, and finally install the pulley 4 to complete the installation.

[0018] The worm gear bearing preload of this utility model's worm gear backlash elimination structure is constant pressure preload, and the worm gear backlash can be adjusted to 0. When the worm gear rotates, the worm overcomes the disc spring force, and the worm gear backlash increases slightly. At this time, a smaller worm gear backlash is obtained, and the worm gear rotates, thereby improving the rotation accuracy of the worm gear.

[0019] The foregoing description clearly and completely illustrates the technical solutions in the embodiments of this utility model, enabling those skilled in the art to better understand the advantages and features of this utility model, thereby providing a clearer definition of the scope of protection of this utility model. The embodiments described in this utility model are merely some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

Claims

1. A worm gear backlash elimination structure, characterized in that: include: Base (1), worm gear (2), double-lead worm (3), pulley (4), first locking nut (5), first bearing (6), first spacer (7), first sealing ring (8), first skeleton oil seal (9), disc spring (10), second locking nut (11), second bearing (12), long spacer (13), adjusting spacer (14), second spacer (15), second sealing ring (16), and second skeleton oil seal (17); A worm gear (2) is fixedly installed on the base (1), and a double-lead worm (3) is provided above the worm gear (2); a pulley (4) and a disc spring (10) are respectively provided on both sides of the double-lead worm (3); The first locking nut (5), the first bearing (6), the first spacer (7), the first sealing ring (8) and the first skeleton oil seal (9) are sequentially arranged on the double-lead worm gear (3) on one side of the pulley (4); The disc spring (10) is provided with a second locking nut (11), a second bearing (12), a long spacer (13), an adjusting spacer (14), a second spacer (15), a second sealing ring (16), and a second skeleton oil seal (17) on one side of the double-lead worm gear (3).

2. The worm gear backlash elimination structure according to claim 1, characterized in that: The gear on the double-lead worm (3) meshes with the gear on the worm wheel (2).

3. The worm gear backlash elimination structure according to claim 1, characterized in that: The adjustment spacer (14), disc spring (10), and long spacer (13) are assembled and then fitted into the double-lead worm gear (3) as a whole.

4. The worm gear backlash elimination structure according to claim 1, characterized in that: By adjusting the positions of the first locking nut (5) and the second locking nut (11) on both sides, the backlash of the worm gear (2) and the double-lead worm (3) is reduced to 0.

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