Planetary reducer locking structure
By using a locking element with a threaded connection to the shaft disc and a symmetrical open hole design in the planetary reducer, the problem of time-consuming and labor-intensive adjustment of the roller bearing clearance in the planetary reducer is solved, achieving stable bearing fixation and efficient installation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI KEFENG TRANSMISSION EQUIP CO LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-04-24
AI Technical Summary
Existing planetary gear reducer roller bearing clearance adjustment structures are time-consuming and labor-intensive, and difficult to adjust precisely, which may cause the bearings to rotate in an obstructed manner or become loose.
The bearing is stably fixed by means of a threaded connection between the locking element and the shaft disc, the gap between the flange and the shaft disc is adjusted by rotating the locking element, and the bearing is stably fixed by means of a symmetrical design of smooth holes and screw holes.
It enables flexible adjustment of bearing clearance, improves installation efficiency and convenience, ensures stable connection between bearing and shaft disc, prevents locking parts from tilting or shifting, and enhances locking effect.
Smart Images
Figure CN224162043U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of planetary gear reducer bearing locking technology, and in particular to a planetary gear reducer locking structure. Background Technology
[0002] Planetary gearboxes are widely used in the field of mechanical transmission. These gearboxes use tapered roller bearings for support, and the bearing clearance needs precise adjustment. Currently, the most common method is as shown in the instruction manual. Figure 1 Adjust the gap as shown.
[0003] Instruction manual attached Figure 1 In the diagram, 100 is the shaft disc, 200 is the roller bearing, 300 is the pressure plate, and 400 is the screw. L is the distance between the roller bearing 200 and the shaft disc 100. After measuring L, a pressure plate 300 with a thickness and length L is used to fix it to the shaft disc 100 with screws 400, so that the pressure plate 300 limits the clearance of the roller bearing 200.
[0004] In the above structure, due to measurement and processing errors, it is often necessary to measure the distance L before processing or combining pressure plates 300 of different thicknesses to ensure that it meets the usage requirements of the distance L. Therefore, adjusting the bearing clearance is time-consuming and labor-intensive. If the actual thickness of the pressure plate 300 relative to the distance L is too small, the roller bearing 200 will be crushed after the screw 400 completely locks the pressure plate 300, causing the roller bearing 200 to be unable to rotate. If the actual thickness of the pressure plate 300 relative to the distance L is too large, the roller bearing 200 will easily loosen after the pressure plate 300 is locked, making it impossible to adjust accurately. Therefore, a clearance adjustment structure that can solve the above technical problems is urgently needed. Utility Model Content
[0005] In view of this, the present invention provides a planetary reducer locking structure to solve the technical problem that the existing planetary reducer roller bearing clearance adjustment structure is time-consuming and labor-intensive.
[0006] An embodiment of this utility model provides a planetary reducer locking structure, comprising:
[0007] A locking component includes an end portion and a flange portion. The end portion is connected to the flange portion. The outer circumferential wall of the end portion is provided with an external thread. The external thread is threadedly connected to a shaft disc. By rotating the locking component, the end portion and the shaft disc are threadedly engaged and thus move axially, thereby changing the relative clearance between the flange portion and the shaft disc. The flange portion is provided with multiple light holes.
[0008] Two screws, which pass through the light hole and are threaded onto the shaft disc, lock the locking member relative to the shaft disc, thereby restricting the position of the bearing and the shaft disc via the flange.
[0009] Furthermore, the optical holes are divided into two groups, and the two groups of optical holes are symmetrically arranged on the flange with the radius of the locking member as the center of symmetry. Each hole in each group of optical holes is arranged circumferentially with the axis of the locking member as the center of rotation.
[0010] Furthermore, the arc of two adjacent optical apertures in a set of optical apertures is S, where S is 15°.
[0011] Furthermore, the side of the shaft disk connected to the end is provided with an internal thread, which is adapted to the external thread.
[0012] Furthermore, the outer surface of the shaft disc is provided with multiple screw holes.
[0013] Furthermore, a plurality of screw holes are arranged circumferentially around the external thread with the same arc, and the screw holes are threadedly connected to the screw.
[0014] Furthermore, the diameters of the distribution circles of the screw holes and the optical holes are equal.
[0015] Furthermore, the diameter of the optical aperture is larger than the diameter of the screw, and the optical aperture is 0.1-0.2 mm larger than the screw diameter.
[0016] Furthermore, the outer surface of the shaft disc has a protrusion, and one end of the bearing abuts against the protrusion.
[0017] The beneficial effects of the technical solution provided by the embodiments of this utility model are as follows: The planetary reducer locking structure of this utility model allows for flexible adjustment of the gap between the flange and the bearing through the thread between the locking member and the shaft disc, without the need to measure the distance L in advance. Secondly, the threaded connection between the screw and the shaft disc further enhances the fixing effect of the locking member, ensuring a stable connection between the bearing and the shaft disc. In addition, the symmetrical design of the light hole and the screw hole, as well as the precise arc distribution, ensures that the screw is subjected to uniform force during the locking process, effectively preventing the locking member from tilting or shifting. The design of the light hole diameter being slightly larger than the screw diameter not only facilitates the insertion and tightening of the screw, but also allows for a certain installation error, improving the convenience and efficiency of installation. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of an existing roller bearing clearance adjustment structure;
[0019] Figure 2 This is a schematic diagram of the locking structure of the planetary reducer of this utility model;
[0020] Figure 3 This is a cross-sectional view of the locking component and section AA of the planetary reducer locking structure of this utility model;
[0021] Figure 4 This is a cross-sectional view of the shaft disc and BB section of the locking structure of the planetary reducer of this utility model.
[0022] In the diagram: 1. Shaft disc; 2. Bearing; 3. Locking element; 31. End; 32. Flange; 33. External thread; 34. Open hole; 4. Screw; 5. Screw hole. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be further described below with reference to the accompanying drawings. The following description presents a preferred embodiment of several possible embodiments of this utility model, intended to provide a basic understanding of the utility model, but not intended to identify the key or decisive elements of the utility model or to limit the scope of protection sought.
[0024] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.
[0025] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.
[0026] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures. Also, it should be understood that, for ease of description, the dimensions of the various parts shown in the figures are not drawn to actual scale.
[0027] In the description of this utility model, it should be noted that the circuits, electronic components and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated. The content protected by this utility model does not involve any improvement to the internal structure and method.
[0028] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0029] Please refer to Figure 2An embodiment of this utility model provides a planetary reducer locking structure, including a locking element 3 and a screw 4.
[0030] The locking component 3 consists of an end 31 and a flange 32, with the end 31 and the flange 32 being tightly connected to form a whole.
[0031] Please refer to Figure 3-4 It should be noted that the outer circumference of the end 31 is designed with an external thread 33, and the side of the shaft disk 1 connected to the end 31 is provided with an internal thread. The external thread 33 is precisely matched with the internal thread on the shaft disk 1.
[0032] This design allows the locking element 3 to be threaded onto the shaft disc 1 at its end 31, thereby precisely adjusting the gap between the flange 32 and the shaft disc 1 to meet the requirements of the operating distance L.
[0033] When the locking element 3 is installed on the shaft disk 1, the external thread 33 and the internal thread are tightly engaged. By rotating the locking element 3, the relative clearance between the flange 32 and the shaft disk 1 can be finely adjusted, thereby achieving precise positioning of the bearing 2.
[0034] This threaded connection not only provides strong axial locking force, but also allows for fine-tuning during installation to suit different installation needs.
[0035] In this embodiment, a plurality of light holes 34 are evenly distributed on the flange 32. The light holes 34 are divided into two groups and arranged symmetrically in a circle with the radius of the locking member 3 as the center of symmetry.
[0036] This symmetrical design ensures that the two screws 4 are subjected to uniform force during the tightening process, effectively preventing the locking element 3 from tilting or shifting on the shaft disc 1.
[0037] In an optional embodiment, the arc S of two adjacent light holes 34 in a set of light holes 34 is 15°, which ensures that the screws 4 are evenly distributed in the circumferential direction, further enhancing the stability and reliability of locking.
[0038] If the number of holes 34 in a group is N, then the spacing angle of screw holes 5 is N*S, and the number is 360 / (N*S). Otherwise, there will be positions within the circumference where the angle adjustment is too large.
[0039] In one specific implementation, a set of four apertures 34, totaling eight apertures 34, are provided on the flange 32, such as... Figure 3 The included angle S between any two 34 is 15°. The number of screw holes 5 is 360 / 15 / 4=6. Therefore, the included angle S1 between any two screw holes 5 is 60°.
[0040] During the 360° rotation of the locking component 3, multiple light holes 34 and a pair of screw holes 5 can be overlapped one by one. With an angular interval of 15° as the standard, the locking component 3 can be locked to the shaft disk 1 by passing the screw 4 through the light holes 34 after rotating the locking component 3 to a set angle. Assuming that the pitch of the external thread 33 is 1mm, the end 31 can move axially by 1*15 / 360=0.041mm for every 15° rotation of the locking component 3. After adjusting the flange 32 to the required overlap position, the locking screw 4 completes the assembly.
[0041] Screw 4 is a key component for achieving the locking function. There is at least one screw, and in this embodiment, two screws are specifically selected. The two screws 4 pass through the light hole 34 on the flange 32. Multiple screw holes 5 are provided on the outside of the shaft disk 1. These screw holes 5 are arranged in a circle with the same arc S1 on the outside of the screw holes 5 and are precisely matched with the threads of the screws 4. The screws 4 and the screw holes 5 on the shaft disk 1 form a firm threaded connection.
[0042] In an optional embodiment, the distribution circle diameters of the screw hole 5 and the aperture 34 are equal, ensuring that the aperture 34 and the screw hole 5 can be precisely aligned when the screw 4 is inserted. The diameter of the aperture 34 is slightly larger than the diameter of the screw (greater than 0.1-0.2 mm) to prevent the locking element 3 from moving due to excessive gap.
[0043] The outer side of the shaft disc 1 is also provided with a protrusion, and one end of the bearing 2 abuts against the protrusion. This design provides initial positioning and support for the bearing 2. When the locking member 3 is installed, the fit between the flange 32 and the shaft disc 2 further enhances the fixing effect on the bearing 2, ensuring that the bearing 2 remains stable during the operation of the planetary reducer.
[0044] In this document, the directional terms such as front, back, top, and bottom are defined based on the position of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that these are relative concepts and can vary depending on different methods of use and placement; the use of these directional terms should not limit the scope of protection claimed in this application.
[0045] Where there is no conflict, the above embodiments and features described herein can be combined with each other.
[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A locking structure for a planetary gear reducer, characterized in that, include: The locking member (3) includes an end (31) and a flange (32). The end (31) is connected to the flange (32). The outer circumferential wall of the end (31) is provided with an external thread (33). The external thread (33) is threadedly connected to the shaft disc (1). By rotating the locking member (3), the end (31) and the shaft disc (1) are threadedly engaged and move axially, thereby changing the relative gap between the flange (32) and the shaft disc (1). The flange (32) is provided with multiple light holes (34). At least one screw (4) passes through the light hole (34) and is threaded onto the shaft disc (1), such that the locking member (3) is locked relative to the shaft disc (1), thereby restricting the position of the bearing (2) and the shaft disc (1) by means of the flange (32).
2. The planetary reducer locking structure as described in claim 1, characterized in that: The light holes (34) are divided into two groups. The two groups of light holes (34) are symmetrically arranged on the flange (32) with the radius of the locking member (3) as the center of symmetry. Each hole of each group of light holes (34) is arranged in a circle with the same spacing with the axis of the locking member (3) as the center of rotation.
3. The planetary reducer locking structure as described in claim 2, characterized in that: The arc of two adjacent optical holes (34) in a set of optical holes (34) is S, where S is 15°.
4. The planetary reducer locking structure as described in claim 1, characterized in that: The shaft disc (1) has an internal thread on the side connected to the end (31), and the internal thread is adapted to the external thread (33).
5. The planetary reducer locking structure as described in claim 2, characterized in that: The shaft disk (1) has multiple screw holes (5) on its exterior.
6. The planetary reducer locking structure as described in claim 5, characterized in that: Multiple screw holes (5) are arranged in a circle with the same arc S1 around the outside of the external thread (33), and the screw holes (5) are threadedly connected to the screw (4).
7. The planetary reducer locking structure as described in claim 6, characterized in that: The diameters of the distribution circles of the screw hole (5) and the light hole (34) are equal.
8. The planetary reducer locking structure as described in claim 1, characterized in that: The diameter of the aperture (34) is larger than the diameter of the screw (4), and the aperture (34) is 0.1-0.2 mm larger than the diameter of the screw (4).
9. The planetary reducer locking structure as described in claim 1, characterized in that: The outer side of the shaft disk (1) has a protrusion, and one end of the bearing (2) abuts against the protrusion.