Worm gear case oil seal installation jig

Abstract

The utility model discloses a worm gear case oil seal installation jig which comprises a sleeve, the sleeve is movably arranged on a worm shaft of a worm gear case in a sleeved mode, the inner diameter of the sleeve is larger than or equal to the diameter of the first outer circle of the worm shaft and smaller than the diameter of the second outer circle of the worm shaft, the appearance of the sleeve is in a circular truncated cone shape, and the outer diameter of the sleeve is larger than or equal to the diameter of the first outer circle of the worm shaft. The outer diameter of the upper bottom face of the sleeve is smaller than the inner diameter of the framework oil seal, and the outer diameter of the lower bottom face of the sleeve is larger than or equal to the diameter of the second outer circle of the worm shaft. Due to the fact that the sleeve is arranged on the worm shaft in the sleeved mode, the sleeve is in the shape of the circular truncated cone, the upper portion of the sleeve is small, the lower portion of the sleeve is large, the framework oil seal can be easily installed on the root of the worm shaft, time and labor are saved, the framework oil seal can be prevented from being damaged, and raw materials are saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to worm wheel box production technical field especially relates to a worm wheel box oil seal installation fixture. BACKGROUND

[0002] The worm wheel box reducer framework oil seal plays the sealing effect, and its installation process needs careful operation, and the oil seal lip will be damaged, even the hoop spring inside the framework oil seal is damaged or falls off, and the sealing fails. INNOVATION CONTENT

[0003] In order to solve above problem, the utility model provides a worm wheel box oil seal installation fixture.

[0004] The utility model is such realization: a worm wheel box oil seal installation fixture, including sleeve, sleeve activity of worm wheel box's worm shaft, the worm wheel box body outer surface is provided with bearing cap, the worm shaft includes outer circle one place and outer circle two places, and the diameter of outer circle two places is greater than the outer circle one place, and the outer circle two places are arranged at the root of the connecting place of worm shaft and bearing cap, the outer circle two places are set up framework oil seal, and the inner diameter of framework oil seal is less than the diameter of the outer circle two places of worm shaft, the sleeve inner diameter is greater than or equal to the diameter of the outer circle one place of worm shaft, and less than the diameter of the outer circle two places of worm shaft, the sleeve shape is set up as circular truncated cone shape, the outer diameter of sleeve upper bottom surface is less than the inner diameter of framework oil seal, and the outer diameter of sleeve lower bottom surface is greater than or equal to the diameter of the outer circle two places of worm shaft.

[0005] The length of the sleeve is greater than or equal to the axial length of the outer circle one place of the worm shaft.

[0006] The angle between the generatrix of the outer surface of the sleeve and the plane projection of the vertical center line is 1-3 °.

[0007] In the worm gear box production process, the skeleton oil seal needs to be installed at the root of the worm shaft of the worm gear box, the root of the worm shaft is slightly larger in diameter than the front section, the front section is defined as an outer circle one, the slightly larger diameter is defined as an outer circle two, and the axial length of the outer circle two is only enough to hold the width of the skeleton oil seal, the skeleton oil seal comprises a rubber part and an inner lining fastening spring, in order to ensure the sealing effect, the inner diameter of the skeleton oil seal is slightly smaller than the diameter of the outer circle two, the above structure causes that it is very difficult, time-consuming and laborious to set the skeleton oil seal at the position of the outer circle two, and even the damage of the lip of the inner circle of the oil seal may occur when the skeleton oil seal is installed, the hoop spring inside the skeleton oil seal is damaged or falls off, and the sealing fails, therefore, the utility model designs an installation sleeve, the sleeve is sleeved on the outer circle one of the worm shaft, the inner hole of the sleeve is in sliding fit with the outer circle one of the worm shaft, the lower end face of the sleeve is in close contact with the end face of the outer circle two of the worm shaft, the outer circle of the sleeve is a circular truncated cone, the diameter of the lower bottom face of the outer circle of the sleeve is slightly larger than the diameter of the outer circle two of the worm shaft, and the diameter of the upper bottom face of the outer circle of the sleeve is smaller than the inner diameter (lip) of the skeleton oil seal, so that the skeleton oil seal is smoothly sleeved without damage. When in use, the skeleton oil seal is only needed to be installed from the outer circle of the upper end of the sleeve, and the skeleton oil seal is pressed into the sleeve along the outer circle of the sleeve, the lip of the skeleton oil seal is smoothly sleeved into the outer circle two of the worm shaft, and then the skeleton oil seal is pressed to the position.

[0008] The utility model discloses the beneficial effects are: through setting installation sleeve, sleeve sets up on the worm shaft, and the sleeve appearance is a circular truncated cone, and the upper is small and the lower is big, can easily install the skeleton oil seal to the root of the worm shaft, saves time and labour, and can avoid the damage of the skeleton oil seal, and saves the raw material. DRAWINGS

[0009] Fig. 1 It is the worm gear box three -dimensional structure schematic diagram of the utility model;

[0010] Fig. 2 It is the worm gear box front view structure schematic diagram of the utility model;

[0011] Fig. 3 It is the sleeve structure schematic diagram of the utility model;

[0012] In the drawing: 1-sleeve, 2-box, 3-bearing cover, 4-skeleton oil seal, 5-worm shaft, 6-outer circle one, 7-outer circle two. PREFERRED EMBODIMENT

[0013] In order to more clearly understand the technical scheme of the utility model, the utility model is further illustrated below in combination with the drawings.

[0014] As Figs. 1-3The worm box oil seal mounting jig shown comprises a sleeve 1 movably sleeved on a worm shaft 5 of a worm box, a bearing cover 3 is arranged on an outer surface of a worm box body 2, the worm shaft 5 comprises an outer circle first position 6 and an outer circle second position 7, the diameter of the outer circle second position 7 is greater than that of the outer circle first position 6, the outer circle second position 7 is arranged at the root of the connecting position of the worm shaft 5 and the bearing cover 3, the outer circle second position 7 is sleeved with a skeleton oil seal 4, the inner diameter of the skeleton oil seal 4 is less than the diameter of the outer circle second position 7 of the worm shaft, the inner diameter of the sleeve 1 is greater than or equal to the diameter of the outer circle first position 6 of the worm shaft and is less than the diameter of the outer circle second position 7 of the worm shaft, the shape of the sleeve 1 is a circular truncated cone, the outer diameter of the upper bottom surface of the sleeve 1 is less than the inner diameter of the skeleton oil seal 4, the outer diameter of the lower bottom surface of the sleeve 1 is greater than or equal to the diameter of the outer circle second position 7 of the worm shaft, the length of the sleeve 1 is greater than or equal to the axial length of the outer circle first position 6 of the worm shaft, the included angle between the generatrix of the outer surface of the sleeve 1 and the vertical central line is 1-3°, as shown in the figure, Fig. 3 When used, the sleeve 1 is sleeved on the outer circle first position 6 of the worm shaft with the upper bottom surface outward, the skeleton oil seal 4 is only needed to be sleeved on the outer circle of the sleeve from the upper bottom surface, the skeleton oil seal is pressed in along the outer circle of the sleeve 1, the inner diameter lip of the skeleton oil seal is smoothly sleeved on the outer circle second position 7 of the worm shaft, and then the skeleton oil seal is pressed into place, so that the whole process is time-saving and labor-saving and the skeleton oil seal is not damaged.

[0015] The above is only a preferred embodiment of the present application, so equivalent changes or modifications made according to the structure, features and principles of the present application patent application range are included in the present application patent application range.

Claims

1. A worm gear box oil seal installation jig characterized by, The sleeve is movably sleeved on the worm shaft of the worm gear box, the bearing cover is arranged on the outer surface of the box body of the worm gear box, the worm shaft comprises an outer circle I and an outer circle II, the diameter of the outer circle II is greater than that of the outer circle I, the outer circle II is arranged at the root of the connection between the worm shaft and the bearing cover, the outer circle II is sleeved with a skeleton oil seal, the inner diameter of the skeleton oil seal is smaller than the diameter of the outer circle II of the worm shaft, the inner diameter of the sleeve is greater than or equal to the diameter of the outer circle I of the worm shaft and smaller than the diameter of the outer circle II of the worm shaft, the outer shape of the sleeve is in the shape of a circular truncated cone, the outer diameter of the upper bottom surface of the sleeve is smaller than the inner diameter of the skeleton oil seal, and the outer diameter of the lower bottom surface of the sleeve is greater than or equal to the diameter of the outer circle II of the worm shaft.

2. The oil seal installation jig for a worm wheel housing according to claim 1, characterized by The length of the sleeve is greater than or equal to the axial length of the outer circle I of the worm shaft.

3. The oil seal installation jig for a worm wheel housing according to claim 1, characterized by The included angle between the generatrix of the outer surface of the sleeve and the plane projection of the vertical center line is 1-3°.

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