Worm fixing structure

Abstract

The utility model belongs to the technical field of worm transmission devices, and particularly relates to a worm fixing structure which comprises a shell, a worm gear and a worm are rotatably arranged in the shell, the worm is arranged at the top of the worm gear and meshed with the worm gear, one end of the worm is rotatably arranged in the shell through a rear shaft sleeve, and the other end of the worm is rotatably arranged in a threaded shaft sleeve through a front shaft sleeve. The threaded shaft sleeve is arranged in the shell in a threaded mode. The screw-in depth of the threaded shaft sleeve in the shell is adjusted, then the front shaft sleeve abuts against the worm to adjust the axial position gap, the arrangement precision of the worm is improved, the working stability of the worm is guaranteed, the worm is prevented from moving or shaking in the working process, meanwhile, too tight matching of all parts is avoided, and the service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of worm transmission devices, and particularly relates to a worm fixing structure. Background Art

[0002] Worm and worm wheel transmission realizes power transmission through the meshing of the worm wheel and the worm. The worm is a shaft with spiral teeth, and the worm wheel is a special gear with a specific number of teeth. When the worm rotates, its spiral teeth mesh with the teeth of the worm wheel, thereby driving the worm wheel to rotate and achieving the power transmission effect.

[0003] In the existing technology, generally, both ends of the worm are fixed in the housing through bearings or bushings. When the axial position clearance of the worm is too large, it will cause too large axial displacement, resulting in the worm moving or shaking during operation; when the axial position clearance of the worm is too small, it will cause the cooperation of each component to be too tight, resulting in the overload of other components. When installing the worm, it is very difficult to ensure an appropriate axial position clearance, thus affecting the accuracy and service life of components such as bearings and bushings. Summary of the Utility Model

[0004] According to the above deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a worm fixing structure, which adjusts the screwing depth of the threaded bushing in the housing, and then uses the front bushing to abut against the worm to adjust the axial position clearance, so as to solve the problem of inappropriate axial position clearance when installing the worm.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0006] The worm fixing structure described in the utility model includes a housing, in which a worm wheel and a worm are rotatably arranged. The worm is arranged on the top of the worm wheel, and the worm meshes with the worm wheel. One end of the worm is rotatably arranged in the housing through a rear bushing, and the other end of the worm is rotatably arranged in a threaded bushing through a front bushing, and the threaded bushing is threadedly arranged in the housing.

[0007] Among them:

[0008] A bearing one and a bearing two are sleeved on the worm.

[0009] The bearing one is arranged on one side of the worm close to the rear bushing, and the bearing two is arranged on one side of the worm close to the front bushing.

[0010] Two annular bosses are arranged on the worm. The bearing one is arranged between one annular boss and the rear bushing, and the bearing two is arranged between the other annular boss and the front bushing.

[0011] The outer surface of the threaded bushing is provided with an external thread.

[0012] The inner wall of the housing is provided with an internal thread for mating with the threaded bushing.

[0013] The worm is arranged through the threaded bushing, and a cover plate is arranged at one end of the worm close to the threaded bushing.

[0014] A skeleton oil seal is arranged inside the threaded bushing, and the skeleton oil seal is sleeved on the worm.

[0015] An O-ring is arranged between the skeleton oil seal and the worm.

[0016] The O-ring is sleeved on the worm.

[0017] The beneficial effects of the present utility model are as follows:

[0018] By adjusting the screwing depth of the threaded bushing in the housing, and then using the front bushing to abut against the worm to adjust the axial position clearance, the setting accuracy of the worm is improved, the working stability of the worm is ensured, the worm is prevented from moving or shaking during the working process, and at the same time, the too tight fit of each component is avoided, increasing the service life. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the present utility model;

[0020] In the figure: 1, threaded bushing; 2, front bushing; 3, second bearing; 4, worm; 5, first bearing; 6, rear bushing; 7, skeleton oil seal; 8, O-ring; 9, cover plate; 10, housing; 11, worm gear. Specific Embodiments

[0021] The following further describes the embodiments of the present utility model with reference to the drawings.

[0022] Embodiment 1

[0023] As Figure 1 shown, the present utility model includes a housing 10, a worm gear 11 and a worm 4 are rotatably arranged inside the housing 10, the worm 4 is arranged on the top of the worm gear 11, the worm 4 meshes with the worm gear 11, one end of the worm 4 is rotatably arranged inside the housing 10 through a rear bushing 6, the other end of the worm 4 is rotatably arranged inside a threaded bushing 1 through a front bushing 2, and the threaded bushing 1 is threadedly arranged inside the housing 10.

[0024] By adjusting the screwing depth of the threaded bushing 1 in the housing 10, and then using the front bushing 2 to abut against the worm 4 to adjust the axial position clearance, the setting accuracy of the worm 4 is improved, the working stability of the worm 4 is ensured, the worm 4 is prevented from moving or shaking during the working process, and at the same time, the too tight fit of each component is avoided, increasing the service life.

[0025] A first bearing 5 and a second bearing 3 are sleeved on the worm 4.

[0026] The first bearing 5 is arranged on one side of the worm 4 close to the rear bushing 6, and the second bearing 3 is arranged on one side of the worm 4 close to the front bushing 2.

[0027] There are two annular bosses provided on the worm 4. The first bearing 5 is arranged between one annular boss and the rear shaft sleeve 6, and the second bearing 3 is arranged between the other annular boss and the front shaft sleeve 2. The arrangement of the annular bosses can facilitate the worm 4 to be pushed by the threaded shaft sleeve 1 through the front shaft sleeve 2.

[0028] The outer surface of the threaded shaft sleeve 1 is provided with external threads.

[0029] The inner wall of the housing 10 is provided with internal threads to cooperate with the threaded shaft sleeve 1.

[0030] The worm 4 passes through the threaded shaft sleeve 1, and a cover plate 9 is arranged at one end of the worm 4 close to the threaded shaft sleeve 1.

[0031] A skeleton oil seal 7 is arranged inside the threaded shaft sleeve 1, and the skeleton oil seal 7 is sleeved on the worm 4.

[0032] An O-ring 8 is arranged between the skeleton oil seal 7 and the worm 4.

[0033] The O-ring 8 is sleeved on the worm 4.

Claims

1. A worm fixing structure, comprising a housing (10), a worm wheel (11) and a worm (4) being rotatably arranged in the housing (10), the worm (4) being arranged on the top of the worm wheel (11), the worm (4) being meshed with the worm wheel (11), characterized in that: One end of the worm (4) is rotatably disposed in the housing (10) via a rear shaft sleeve (6), and the other end of the worm (4) is rotatably disposed in the threaded shaft sleeve (1) via a front shaft sleeve (2), and the threaded shaft sleeve (1) is threadably disposed in the housing (10).

2. The worm fixing structure according to claim 1, characterized in that: The worm (4) is sleeved with a first bearing (5) and a second bearing (3).

3. The worm fixing structure according to claim 2, characterized in that: The first bearing (5) is arranged on a side of the worm (4) close to the rear shaft sleeve (6), and the second bearing (3) is arranged on a side of the worm (4) close to the front shaft sleeve (2).

4. The worm fixing structure according to claim 3, characterized in that: Two annular bosses are arranged on the worm (4), bearing one (5) is arranged between one annular boss and the rear shaft sleeve (6), and bearing two (3) is arranged between the other annular boss and the front shaft sleeve (2).

5. The worm fixing structure according to claim 1, characterized in that: The outer surface of the threaded sleeve (1) is provided with external threads.

6. The worm fixing structure according to claim 5, characterized in that: The inner wall of the housing (10) is matched with the threaded sleeve (1) and is provided with an internal thread.

7. The worm fixing structure according to claim 1, characterized in that: The worm (4) is arranged to penetrate the threaded shaft sleeve (1), and a cover plate (9) is arranged at one end of the worm (4) close to the threaded shaft sleeve (1).

8. The worm fixing structure according to claim 1, characterized in that: A skeleton oil seal (7) is arranged in the threaded shaft sleeve (1), and the skeleton oil seal (7) is sleeved on the worm (4).

9. The worm fixing structure according to claim 8, characterized in that: An O-ring (8) is provided between the skeleton oil seal (7) and the worm (4).

10. The worm fixing structure according to claim 9, characterized in that: The O-ring (8) is sleeved on the worm (4).

Images