Speed reducer with locking structure
By integrating a compensation locking structure at the input end of the reducer, the problem of insufficient connection length between the motor shaft and the reducer shaft is solved, achieving reliable connection and stable transmission, and improving transmission efficiency and equipment life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU QINGMIN TRANSMISSION EQUIP CO LTD
- Filing Date
- 2025-09-22
- Publication Date
- 2026-07-14
AI Technical Summary
In industrial transmission systems, insufficient connection length between the motor shaft and the reducer input shaft leads to low transmission efficiency and unstable operation. Furthermore, traditional connection methods are prone to local stress concentration and shaft end wear, and may even result in slippage or breakage.
Design a speed reducer with a locking structure. By integrating a compensating locking structure at the input end of the speed reducer, and using components such as locking rings and limit blocks, an adjustable connection between the motor shaft and the speed reducer shaft can be achieved, ensuring the axial fit length and avoiding local stress concentration.
It achieves a reliable connection between the motor shaft and the reducer shaft, improves transmission efficiency and operational stability, avoids additional processing requirements and component procurement, and is suitable for scenarios where the motor shaft extension length is insufficient.
Smart Images
Figure CN224497153U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of speed reducer technology, specifically a speed reducer with a locking structure. Background Technology
[0002] In industrial transmission systems, motors and reducers are the core power transmission units. The reliable connection between the motor shaft and the reducer input shaft directly determines the transmission efficiency, operational stability, and equipment lifespan. As industrial equipment develops towards larger size, greater precision, and greater flexibility, the problem of insufficient length when connecting the motor shaft and the reducer input shaft has become increasingly prominent.
[0003] Traditional keyed and flanged connections are rigid positioning connections, which have extremely high requirements for the axial fit length of the two shafts. If the motor shaft is too compact or the installation error, such as the motor base offset, causes the axial distance between the two shafts to increase, resulting in insufficient length, direct connection will lead to insufficient fit depth. Even if it is forcibly locked, the small contact area will cause local stress concentration, leading to keyway deformation, shaft end wear, or even slippage or breakage when transmitting torque. Therefore, we propose a reducer with a locking structure. Utility Model Content
[0004] This utility model provides the following technical solution: a speed reducer with a locking structure, including a speed reducer body, an input end fixedly installed on the side end of the speed reducer body, and a compensation locking structure provided at one end of the input end;
[0005] The compensation locking structure includes two locking rings, which are sleeved on the outer surface of the input end. Two symmetrically arranged limiting blocks are fixedly installed on the inner side ends of each of the two locking rings. Grooves adapted to the limiting blocks are opened on the surfaces of the input end and the motor shaft. A fixing block is fixedly installed on the bottom end of each of the two locking rings. Threaded rods are fixedly installed on the opposite side ends of the two fixing blocks. Internal threaded tubes are threaded to the outer surfaces of the two threaded rods. A limiting structure is provided at the upper end of each of the two locking rings, and a locking structure is provided at the side ends of each of the two locking rings.
[0006] Preferably, each locking ring includes an upper half ring and a lower half ring, the longitudinal sections of the upper half ring and the lower half ring are arranged in a semi-circular shape, and one end of the upper half ring and the lower half ring are connected by a hinge.
[0007] Preferably, the limiting structure includes two fixing blocks, which are respectively fixedly installed on the upper ends of the two upper half rings, and a telescopic rod is fixedly installed on the side between the two fixing blocks.
[0008] Preferably, each locking structure includes a plug-in block and a receiving block. The plug-in block is fixedly installed on the side end of the upper half ring, and the receiving block is fixedly installed on the side end of the lower half ring. A plug-in rod is fixedly installed at the bottom end of the plug-in block, and a plug-in groove is opened on the side end of the plug-in rod. A limit slide rod is slidably connected to the side end of the receiving block. A limit plate is fixedly installed on the side end of the limit slide rod, and a plurality of connecting springs are fixedly installed on the side end of the limit plate. One end of the plurality of connecting springs is fixedly installed on the side end of the receiving block, and a pop-out structure is provided inside the receiving block.
[0009] Preferably, the pop-out structure includes multiple pop-out springs, which are fixedly installed at the bottom of the receiving block, and pop-out plates are fixedly installed at the top of the multiple pop-out springs.
[0010] Preferably, a rotating sleeve is fixedly installed on the outer surface of the internally threaded tube, and the outer surface of the rotating sleeve is provided with anti-slip texture.
[0011] Compared with the prior art, the beneficial effects of this utility model are:
[0012] This utility model integrates the locking and compensation structure directly into the input end of the reducer. Installation can be completed simply by inserting the motor shaft, adjusting the compensation stroke, and locking it in place. No additional auxiliary parts need to be purchased or assembled. The adjustable axial stroke design can cover various scenarios such as insufficient motor shaft extension length, and no secondary processing of the motor shaft or reducer shaft is required. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model;
[0014] Figure 2 This is a schematic diagram of the structure of the first component of this utility model;
[0015] Figure 3 This is a cross-sectional view of the second component of this utility model.
[0016] In the diagram: 1. Reducer body; 2. Input end; 3. Compensation locking structure; 31. Locking ring; 311. Upper half ring; 312. Lower half ring; 32. Limiting block; 33. Telescopic rod; 34. Fixed block one; 35. Threaded rod; 36. Locking structure; 361. Insertion block; 362. Insertion rod; 363. Insertion groove; 364. Receiving block; 365. Limiting slide rod; 366. Pop-out spring; 367. Pop-out plate; 368. Limiting plate; 369. Connecting spring; 37. Rotating sleeve; 38. Internal threaded pipe; 39. Fixed block two.
[0017] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to the specific structure, device and environment. According to specific needs, those skilled in the art can adjust or modify these devices and environments, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] like Figures 1-3 As shown, this utility model provides a technical solution: a speed reducer with a locking structure, including a speed reducer body 1, an input end 2 fixedly installed on the side end of the speed reducer body 1, and a compensation locking structure 3 provided at one end of the input end 2;
[0020] The compensation locking structure 3 includes two locking rings 31, which are sleeved on the outer surface of the input end 2. Two symmetrically arranged limiting blocks 32 are fixedly installed on the inner side of each of the two locking rings 31. Grooves that match the limiting blocks 32 are opened on the surfaces of the input end 2 and the motor shaft. Fixing blocks 34 are fixedly installed on the bottom of each of the two locking rings 31. Threaded rods 35 are fixedly installed on the opposite side of each of the two fixing blocks 34. The outer surfaces of the two threaded rods 35 are threaded with internal threaded tubes 38. Limiting structures are provided at the upper ends of the two locking rings 31, and locking structures 36 are provided on the side ends of each of the two locking rings 31.
[0021] In an optional embodiment: each locking ring 31 includes an upper half ring 311 and a lower half ring 312, the longitudinal sections of the upper half ring 311 and the lower half ring 312 are arranged in a semi-circular shape, and one end of the upper half ring 311 and the lower half ring 312 are connected by a hinge.
[0022] It should be noted that it is adapted to the shape of the motor shaft and the reducer shaft and can be fitted to the outer surface of the shaft.
[0023] In an optional embodiment: the limiting structure includes two fixing blocks 39, which are respectively fixedly installed on the upper ends of the two upper half rings 311, and a telescopic rod 33 is fixedly installed on the side end between the two fixing blocks 39.
[0024] It should be noted that when the internal threaded tube 38 rotates, it will not cause the threaded rod 35 to rotate as well, and there is no need to manually limit the position of the locking ring 31.
[0025] In an optional embodiment: each locking structure 36 includes a plug block 361 and a receiving block 364. The plug block 361 is fixedly installed on the side end of the upper half ring 311, and the receiving block 364 is fixedly installed on the side end of the lower half ring 312. A plug rod 362 is fixedly installed at the bottom end of the plug block 361, and a plug groove 363 is provided on the side end of the plug rod 362. A limiting slide rod 365 is slidably connected to the side end of the receiving block 364. A limiting plate 368 is fixedly installed on the side end of the limiting slide rod 365. A plurality of connecting springs 369 are fixedly installed on the side end of the limiting plate 368. One end of the plurality of connecting springs 369 is fixedly installed on the side end of the receiving block 364. The receiving block 364 has a pop-out structure inside.
[0026] It should be noted that the limiting slide bar 365 can move or be inserted into the insertion slot 363 under the elastic force of the connecting spring 369, thereby locking or unbinding the insertion rod 362, and then fixing the upper half ring 311 and the lower half ring 312 together to lock the locking ring 31.
[0027] In an optional embodiment: the pop-out structure includes a plurality of pop-out springs 366, which are fixedly installed at the bottom of the inner part of the receiving block 364, and a pop-out plate 367 is fixedly installed at the upper end of the plurality of pop-out springs 366.
[0028] It should be noted that when the limiting slide bar 365 is pulled outward, the plug rod 362 is no longer restrained by the force, and under the elastic force of the pop-out spring 366, it can push the plug rod 362 out of the inside of the receiving block 364 without needing to be pulled outward manually.
[0029] In an optional embodiment: a rotating sleeve 37 is fixedly installed on the outer surface of the internally threaded tube 38, and the outer surface of the rotating sleeve 37 is provided with anti-slip texture.
[0030] It should be noted that the rotation of the internally threaded tube 38 is controlled by rotating the rotating sleeve 37, and the anti-slip texture makes it less likely to slip during rotation.
[0031] In practical use, the working principle of this utility model is as follows:
[0032] In use, grooves matching the limit block 32 are cut on the outer surfaces of both the reducer shaft and the motor shaft. When the two shafts cannot fit together completely, the internal threaded tube 38 is rotated in both directions. Since the two threaded rods 35 cannot rotate, the rotation of the internal threaded tube 38 can cause the two threaded rods 35 to move simultaneously relative to each other or away from each other. When the threaded rods 35 move, they can also cause the two locking rings 31 to move relative to each other or away from each other, thereby adjusting the distance between the two locking rings 31. Scale markings can be set on the telescopic surface of the telescopic rod 33. When the locking ring 31 moves, the distance between the two can be known. Then, the two locking rings 31 are respectively placed on the outer surface of the reducer shaft and the motor shaft, so that the groove on the shaft is in contact with the position of the limiting block 32, restricting the position of the two shafts. When the upper half ring 311 and the lower half ring 312 are in contact, one end of the limiting slide rod 365 is inserted into the insertion groove 363, thereby fixing the position of the insertion rod 362, and then fixing the lower half ring 312 and the upper half ring 311 together. When disassembling later, you only need to pull out the limiting slide rod 365.
[0033] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.
Claims
1. A speed reducer with a locking structure, comprising a speed reducer body (1), characterized in that: An input end (2) is fixedly installed on the side end of the reducer body (1), and a compensation locking structure (3) is provided at one end of the input end (2); The compensation locking structure (3) includes two locking rings (31). The two locking rings (31) are sleeved on the outer surface of the input end (2). Two symmetrically arranged limiting blocks (32) are fixedly installed on the inner side of each of the two locking rings (31). The surfaces of the input end (2) and the motor shaft are provided with grooves that are adapted to the limiting blocks (32). The bottom ends of the two locking rings (31) are fixedly installed with fixing blocks (34). The opposite side ends of the two fixing blocks (34) are fixedly installed with threaded rods (35). The outer surfaces of the two threaded rods (35) are threaded with internal threaded tubes (38). The upper ends of the two locking rings (31) are provided with limiting structures. The side ends of the two locking rings (31) are provided with locking structures (36).
2. A speed reducer with a locking structure according to claim 1, characterized in that: Each of the locking rings (31) includes an upper half ring (311) and a lower half ring (312), the longitudinal sections of the upper half ring (311) and the lower half ring (312) are arranged in a semi-circular shape, and one end of the upper half ring (311) and the lower half ring (312) are connected by a hinge.
3. A speed reducer with a locking structure according to claim 2, characterized in that: The limiting structure includes two fixing blocks (39), which are respectively fixedly installed on the upper ends of the two upper half rings (311), and a telescopic rod (33) is fixedly installed on the side between the two fixing blocks (39).
4. A speed reducer with a locking structure according to claim 2, characterized in that: Each of the locking structures (36) includes a plug-in block (361) and a receiving block (364). The plug-in block (361) is fixedly installed on the side end of the upper half ring (311), and the receiving block (364) is fixedly installed on the side end of the lower half ring (312). A plug-in rod (362) is fixedly installed at the bottom end of the plug-in block (361). A plug-in groove (363) is provided on the side end of the plug-in rod (362). A limit slide rod (365) is slidably connected to the side end of the receiving block (364). A limit plate (368) is fixedly installed on the side end of the limit slide rod (365). A plurality of connecting springs (369) are fixedly installed on the side end of the limit plate (368). One end of the plurality of connecting springs (369) is fixedly installed on the side end of the receiving block (364). The receiving block (364) has a pop-out structure inside.
5. A speed reducer with a locking structure according to claim 4, characterized in that: The pop-out structure includes multiple pop-out springs (366), which are fixedly installed at the bottom of the receiving block (364), and pop-out plates (367) are fixedly installed at the top of the multiple pop-out springs (366).
6. A speed reducer with a locking structure according to claim 1, characterized in that: A rotating sleeve (37) is fixedly installed on the outer surface of the internally threaded tube (38), and the outer surface of the rotating sleeve (37) is provided with anti-slip texture.