Enveloping speed reducer
By using an envelope reducer design and adjusting the clearance between the worm gear and worm using an eccentric sleeve and locking components, the problem of reduced load-bearing capacity caused by worm gear and worm clearance after wear is solved, achieving higher transmission accuracy and load-bearing capacity.
Patent Information
- Application Number
- CN202423175932.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-23
AI Technical Summary
In existing worm gear reducers, after wear, gaps appear at the contact surfaces between the worm wheel and the worm, resulting in reduced load-bearing capacity and difficulty in ensuring meshing accuracy.
An envelope reducer design is adopted, which uses an eccentric sleeve and a locking element to adjust the clearance between the worm wheel and the worm. The worm wheel is connected to the tapered roller bearing on the eccentric sleeve, and the rotation of the eccentric sleeve is controlled by the locking element, so as to realize the up and down movement of the worm wheel to adjust the clearance.
Effective adjustment of the backlash between the worm gear and the worm improves the transmission's load-bearing capacity and meshing accuracy, thus extending the equipment's service life.
Smart Images
Figure CN223498643U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of speed reducer technology, and in particular relates to a backpack network speed reducer. Background Technology
[0002] Worm gear drives are devices that convert the high-speed, low-torque rotation of an electric motor into low-speed, high-torque operation. They are high-ratio, compact actuators available in both open and closed forms, and are currently widely used in both civilian and military fields.
[0003] Currently, the most common forms of worm gear drives are worm gear reducers and worm gear turntables. Existing worm gear reducers mainly consist of a housing, worm gear, and bearings. The motor drives the worm to rotate, which in turn drives the worm wheel to rotate.
[0004] Under normal conditions, existing worm gear reducers maintain good contact between the worm wheel rollers and worm teeth, resulting in zero backlash and high load-bearing capacity. However, as wear on the worm wheel and worm becomes more severe, the transmission faces the problem of wear on the contact materials, including wear on the roller surfaces and worm teeth. This leads to a gap between the contact surfaces of the rollers and worm teeth, eliminating the zero backlash and reducing the load-bearing capacity of the worm wheel and worm. Consequently, the meshing accuracy between the worm wheel and worm becomes difficult to guarantee. Utility Model Content
[0005] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.
[0006] To address the technical problems mentioned in the background section above, some embodiments of this application provide an envelope reducer, including a housing, a worm gear, and a worm. The housing has a mounting cavity, the worm gear is rotatably disposed within the mounting cavity, and the worm is rotatably disposed within the mounting cavity, meshing with the worm gear. A rotating column is provided within the mounting cavity, and an eccentric sleeve is fitted on the rotating column. A tapered roller bearing is provided on the eccentric sleeve, and the tapered roller bearing is connected to the worm gear. The eccentric sleeve is provided with a locking element.
[0007] Specifically, the locking component includes a nut sleeved on the rotating column, a first locking screw on the nut, and a second locking screw on the nut. The nut has a locking groove, the first locking screw cooperates with the locking groove, and the end of the second locking screw can abut against the eccentric sleeve.
[0008] Specifically, the worm gear is equipped with an oil seal sleeve.
[0009] Specifically, the worm gear is detachably connected to an output flange.
[0010] Specifically, the worm gear is provided with a first sealing cover.
[0011] Specifically, the rotating column is provided with a second sealing cover.
[0012] This application provides an envelope reducer with adjustable backlash. Attached Figure Description
[0013] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.
[0014] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.
[0015] In the attached diagram:
[0016] Figure 1 This is a schematic diagram of the structure of this utility model.
[0017] Figure 2 This is a cross-sectional view of the present invention.
[0018] Figure 3 This is a schematic diagram of the locking component of this utility model.
[0019] Figure 4 This is a schematic diagram of the eccentric sleeve of this utility model. Detailed Implementation
[0020] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.
[0021] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.
[0022] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.
[0023] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".
[0024] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.
[0025] like Figure 1-4 As shown, an envelope reducer includes a housing 1, a worm gear 2, and a worm 3. The housing 1 has a mounting cavity 11. A rotating column 12 is integrally formed on the side wall of the mounting cavity. An eccentric sleeve 4 is fitted onto the rotating column 12, with its outer axis deflected from its inner axis by a certain distance. A tapered roller bearing 5 is fitted onto the eccentric sleeve 4, and a set of back-to-back tapered roller bearings is selected. The worm gear 2 is fitted outside the tapered roller bearings. The worm 3 is rotatably connected to the mounting cavity of the housing, and the worm meshes with the worm gear. A locking element is used to control the rotation of the eccentric sleeve. By rotating the eccentric sleeve, the worm gear can be driven to move up and down, thereby changing the clearance between the worm and the worm gear.
[0026] Specifically, the locking components include a nut 6, a first locking screw 61, and a second locking screw 62. The nut 6 is screwed onto the rotating column 12 and has a locking groove 63. The first locking screw 61 is screwed onto the nut and has a corresponding locking groove. The pitch of the nut can be changed by rotating the first locking screw. The second locking screw 62 is screwed onto the nut, and one end of it can abut against the eccentric sleeve. When it is necessary to lock the eccentric sleeve, first rotate the first locking screw to change the pitch of the nut so that the nut is locked onto the rotating column. Then rotate the second locking screw 62 so that the end of the second locking screw abuts against the eccentric sleeve, thereby restricting the rotation of the eccentric sleeve. When it is necessary to adjust the clearance, rotate the second locking screw so that the end of the second screw is disengaged from the eccentric sleeve, and then rotate the eccentric sleeve.
[0027] In other embodiments, an oil seal sleeve 21 is fitted on the worm gear 2, with one side of the oil seal sleeve 21 fitting against the worm gear and the other side fitting against the inner wall of the mounting cavity.
[0028] In other embodiments, the worm gear 2 is detachably connected to the output flange 23 by screws 22.
[0029] In other embodiments, the worm gear 2 is provided with a first sealing cover 24.
[0030] In other embodiments, the rotating column 12 is provided with a second sealing cover 25.
[0031] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.
Claims
1. An envelope reducer, comprising a housing, a worm gear, and a worm, characterized in that, The housing is provided with an installation cavity, the worm wheel is rotatably disposed in the installation cavity, the worm is rotatably disposed in the installation cavity and the worm meshes with the worm wheel, the installation cavity is provided with a rotating column, an eccentric sleeve is fitted on the rotating column, a tapered roller bearing is provided on the eccentric sleeve, the tapered roller bearing is connected to the worm wheel, and the eccentric sleeve is provided with a locking element.
2. The envelope reducer according to claim 1, characterized in that: The locking component includes a nut sleeved on the rotating column, a first locking screw on the nut, and a second locking screw on the nut. The nut has a locking groove, the first locking screw cooperates with the locking groove, and the end of the second locking screw can abut against the eccentric sleeve.
3. The envelope reducer according to claim 1, characterized in that: The worm gear is equipped with an oil seal sleeve.
4. The envelope reducer according to claim 1, characterized in that: The worm gear is detachably connected to an output flange.
5. The envelope reducer according to claim 1, characterized in that: The worm gear is provided with a first sealing cover.
6. The envelope reducer according to claim 1, characterized in that: The rotating column is equipped with a second sealing cover.