Rotating handle and shaft sleeve assembly structure of potentiometer
By setting up inner grooves and detent sections in the assembly structure of the potentiometer rotary handle and shaft sleeve, the problem of oil and grease spillage is solved, the production process is simplified, and the assembly efficiency and product quality are improved.
Patent Information
- Application Number
- CN202422256853.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-09-14
AI Technical Summary
During the assembly process of the potentiometer, grease is prone to overflow and contaminate the outside, resulting in complex cleaning operations and may cause adverse effects, affecting production efficiency.
A potentiometer assembly structure is designed. The outer wall of the rotary shank is equipped with an inner groove. The inner groove on the outer wall of the middle section is used to prevent oil from spilling out and store excess grease. The central through hole of the rotary shank and the shaft sleeve is designed as a detent section to prevent oil from being extruded.
It realizes that the grease does not overflow during the assembly process, simplifies cleaning operations, reduces labor costs, avoids defective rates, and maintains a good lubrication effect.
Smart Images
Figure CN223260409U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of potentiometers, in particular to an assembly structure of a turning handle and a shaft sleeve of a potentiometer. Background Art
[0002] A rotary potentiometer adjusts resistance by rotating a handle to change the contact position between the brush and the resistor. A rotary potentiometer consists of a handle and a sleeve that holds the handle and allows for stable rotation. To prevent radial movement of the handle from affecting the potentiometer's stability, the handle and sleeve's through-holes are fitted with a very close clearance. To ensure smooth rotation, grease is applied between the handle and sleeve during production. This is done by applying grease to the handle before inserting it into the sleeve's through-hole. However, due to the very close clearance between the two, the grease is forced upwards from the sleeve during insertion, contaminating the potentiometer's exterior. This requires dedicated personnel to clean the handle, but this process can easily lead to defects such as deformation of the potentiometer pins. Therefore, improvements and optimizations are necessary to streamline production and control defect rates. Utility Model Content
[0003] The utility model aims to provide a rotating handle and shaft sleeve assembly structure of a potentiometer, so as to solve the problems of grease overflow during assembly and the defects caused by cleaning.
[0004] In order to achieve the above purpose, the technical solution adopted by the present utility model is:
[0005] A turning handle and sleeve assembly structure of a potentiometer includes a sleeve having a central through hole, and a turning handle passing through the central through hole and rotatably assembled with the sleeve, the central through hole including an assembly section adapted to the outer diameter of the turning handle, and a sinking section located at the top end and having an inner diameter larger than that of the assembly section, the turning handle having an intermediate section passing through the central through hole, and a grip section located outside the central through hole and having a diameter larger than that of the intermediate section, the connection between the grip section and the intermediate section forms a step surface that abuts against the top surface of the sleeve, and the outer wall of the intermediate section has an inner groove that prevents grease from overflowing onto the step surface.
[0006] In a preferred embodiment, the inner groove is distributed in a section of the middle section that matches the assembly section.
[0007] In a preferred embodiment, the inner grooves include a plurality of inner grooves axially arranged on the outer wall of the middle section, and the inner grooves are evenly distributed around the circumference.
[0008] In a preferred embodiment, the cross section of the inner groove is in the shape of an inwardly concave circular arc or a U shape.
[0009] In a preferred embodiment, the inner groove is a spiral groove wound around the outer wall of the middle section.
[0010] In a preferred embodiment, the inner groove is provided on a section of the middle section corresponding to the sinking platform section, and the inner groove is an annular groove having a diameter smaller than that of the rest of the middle section.
[0011] The beneficial effect of the present invention is that during assembly, grease is first applied to the outer peripheral wall of the middle section of the handle, and then the middle section is inserted into the central through hole from the top of the sleeve. Since the top portion of the central through hole has a sinking section with a larger diameter, the inner wall of the sinking section will not contact the surface of the middle section and squeeze the grease upward, so that the grease squeezed out of the mating section is pushed into the gap space within the sinking section; and the inner groove on the outer wall of the middle section can not only further prevent the grease from overflowing upward along the shaft, but also can store excess grease, so that a good lubrication effect can be maintained during long-term use. Therefore, this structural design prevents grease from overflowing during assembly and eliminates the need for additional cleaning operations, which saves labor, simplifies production, and avoids defects caused by cleaning. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0013] Figure 1 This is a cross-sectional view of the mounting structure of the handle and the sleeve in Example 1;
[0014] Figure 2 This is a schematic diagram of the cross-sectional structure of a shaft sleeve according to an embodiment;
[0015] Figure 3 This is a schematic diagram of the exploded structure of the handle and the sleeve in Example 1;
[0016] Figure 4 This is a schematic diagram of the first inner groove structure of the handle in Example 1;
[0017] Figure 5 This is a schematic diagram of the second inner groove structure of the handle in Example 1;
[0018] Figure 6 This is a schematic structural diagram of the turning handle in Example 2;
[0019] Figure 7 This is a schematic diagram of the structure of the turning handle in Example 3. DETAILED DESCRIPTION
[0020] The present invention will be further described below with reference to the accompanying drawings:
[0021] The embodiments described with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application. In the description of the present application, it should be understood that the orientation or positional relationship indicated in the terms is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. In addition, unless otherwise expressly specified and limited, terms such as "install", "connect", "connect", and "fix" should be understood in a broad sense, and those of ordinary skill in the art can understand the specific meanings of the above terms in the present application according to the specific circumstances.
[0022] Example 1:
[0023] refer to Figures 1 to 3 As shown, the handle and sleeve assembly structure of a potentiometer of this embodiment includes a sleeve 1 having a central through hole 11, and a handle 2 passing through the central through hole 11 and rotatably assembled with the sleeve 1, the central through hole 11 includes an assembly section 111 adapted to the outer diameter of the handle 2, and a sink section 112 located at the top end and with an inner diameter larger than that of the assembly section 111, the handle 2 has a middle section 21 passing through the central through hole 11, and a handle section 22 located outside the central through hole 11 and with a diameter larger than that of the middle section 21, the connection between the handle section 22 and the middle section 21 forms a step surface 200 that abuts against the top surface of the sleeve 1, and the outer wall of the middle section 21 has an inner groove 211 for preventing grease from overflowing toward the step surface 200.
[0024] During assembly, first apply grease to the outer peripheral wall of the middle section 21 of the handle 2, and then insert the middle section 21 into the central through hole 11 from the top of the sleeve 1. Since the top portion of the central through hole 11 has a larger diameter recessed section 112, the inner wall of the recessed section 112 will not contact the surface of the middle section 21 and squeeze the grease upward, so that the grease squeezed out of the mating section is pushed into the gap space within the recessed section 112. The inner groove 211 on the outer wall of the middle section 21 can not only further prevent the grease from overflowing upward along the shaft, but also store excess grease, so that it can maintain a good lubrication effect even after long-term use. Therefore, this structural design prevents grease from overflowing during assembly and eliminates the need for additional cleaning operations, saving labor, simplifying production, and avoiding defects caused by cleaning.
[0025] In a preferred embodiment, the inner grooves 211 of this embodiment are located in a section of the intermediate section 21 that mates with the assembly section 111. Furthermore, the inner grooves 211 of this embodiment comprise multiple grooves axially disposed on the outer wall of the intermediate section 21, each of which is evenly distributed around the circumference. Positioning the inner grooves on the intermediate section 21 at locations corresponding to the assembly section 111 not only retains some grease within the inner grooves 211, but also reduces the contact surface area between the handle 2 and the sleeve 1, lowering friction and enabling smoother rotation of the handle 2.
[0026] refer to Figure 4 and Figure 5 , a preferred solution, the cross-section of the inner groove 211 of this embodiment is an inward concave arc shape or a U shape.
[0027] Example 2:
[0028] refer to Figure 6 This embodiment has essentially the same structural principles as the first embodiment, differing in that the inner groove 211 is a spiral groove extending around the outer wall of the intermediate section 21. Similarly, the spiral groove not only retains some grease within the inner groove 211 but also reduces the contact surface area between the handle 2 and the sleeve 1, thereby reducing friction and enabling smoother rotation of the handle 2.
[0029] Example 3:
[0030] refer to Figure 7 The structural principles of this embodiment are basically the same as those of the first embodiment, except that the inner groove 211 is provided on the middle section 21 at a portion corresponding to the sink section 112, and the inner groove 211 is an annular groove with a smaller diameter than the rest of the middle section 21. The annular groove can completely prevent grease from overflowing upward along the middle section 21 of the handle 2.
[0031] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.
Claims
1. A potentiometer handle and sleeve assembly structure, comprising a sleeve having a central through hole, and a handle passing through the central through hole and rotatably assembled with the sleeve, characterized in that: The central through hole includes an assembly section adapted to the outer diameter of the turning handle, and a sinking section located at the top end and having an inner diameter larger than that of the assembly section. The turning handle has a middle section passing through the central through hole, and a handle section located outside the central through hole and having a diameter larger than that of the middle section. The connection between the handle section and the middle section forms a step surface that abuts against the top surface of the sleeve, and the outer wall of the middle section has an inner groove that prevents grease from overflowing onto the step surface.
2. The handle and sleeve assembly structure of a potentiometer according to claim 1, characterized in that: The inner groove is distributed on a section of the middle section that matches the assembly section.
3. The handle and sleeve assembly structure of a potentiometer according to claim 2, characterized in that: The inner grooves include a plurality of grooves axially arranged on the outer wall of the middle section, and the inner grooves are evenly distributed around the circumference.
4. The handle and sleeve assembly structure of a potentiometer according to claim 3, characterized in that: The cross section of the inner groove is in an inwardly concave arc shape or a U shape.
5. The handle and sleeve assembly structure of a potentiometer according to claim 1, characterized in that: The inner groove is a spiral groove around the outer wall of the middle section.
6. The handle and sleeve assembly structure of a potentiometer according to claim 1, characterized in that: The inner groove is provided on a section of the middle section corresponding to the sinking platform section, and the inner groove is an annular groove having a diameter smaller than that of the rest of the middle section.