A locking coupling

Abstract

This utility model relates to the field of couplings, specifically to a locking coupling, including a main shaft sleeve, a main body for coupling rotation, a groove formed inside the main shaft sleeve to improve stability, and a spline embedded inside the groove. An inner abutment block is fixedly installed on the outside of the spline, a shaft sleeve is fixedly installed on one side of the outer side of the inner abutment block, and a self-locking block is fixedly installed on the other side of the outer side of the inner abutment block. This utility model is provided with an inner abutment block, a self-locking block, a self-locking groove, a connecting through groove, a self-inserting block, a locking buckle, a driven shaft sleeve, and a locking head. When using this locking coupling, the driving shaft and driven shaft are respectively installed on the shaft sleeves, and then the self-inserting block passes through the connecting through groove and abuts against the self-locking groove of the self-locking block, thereby fixing the self-locking block in the position of the main shaft sleeve and the driven shaft sleeve. Then, when the main shaft sleeve and the driven shaft sleeve are mated, it is only necessary to align the locking rack of the locking head with the locking buckle.

Description

Technical Field

[0001] This utility model relates to the field of couplings, specifically to a locking coupling. Background Technology

[0002] Couplings are mechanical devices that connect driving shafts, such as motor shafts, to driven shafts, such as pump shafts and fan shafts. They transmit power through physical contact or elastic elements. Their core function is to stably transmit power from the drive end to the working end, ensuring the normal operation of the mechanical system. At the same time, they compensate for radial, axial, and angular misalignments of the shaft, such as displacement caused by thermal expansion, installation errors, and vibration, and prevent shaft breakage due to overload. Locking couplings are high-precision transmission devices that achieve axial / radial locking through mechanical structures. They are mainly used to connect two shafts and transmit torque, while preventing the shafts from moving, loosening, or shifting relative to each other under rotation or vibration.

[0003] A search revealed a coupling with publication number CN222436872U, specifically disclosing a coupling in the field of coupling technology. This utility model addresses the technical problem of existing patented couplings being unable to connect two pipe fittings with misaligned shafts. The coupling includes: two connecting seats; a connecting hole at one end of each connecting seat; connecting posts, with multiple connecting posts installed on each of the two connecting seats; and a rubber ring, with the rubber ring shared between the connecting posts on the two connecting seats. The rubber ring and the cavity allow it to bend and deform, offsetting the two connecting seats to connect two pipe fittings with misaligned shafts, thus achieving the effect of connecting two pipe fittings with misaligned shafts.

[0004] Existing locking couplings lack self-locking and anti-loosening capabilities during use. This can cause them to loosen easily under vibration due to the traditional threaded connection, requiring regular checks of the preload. Furthermore, rigid couplings require precise alignment and axial movement during installation, which is time-consuming and prone to errors.

[0005] Therefore, it is necessary to invent a locking coupling to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a locking coupling that achieves self-locking and anti-loosening capability through an inner contact block, a self-locking block, a self-locking groove, a connecting through groove, a self-inserting block, a locking buckle, a driven bushing, and a locking head. This multi-stage locking mechanism, achieved through the mechanical interlocking of the self-locking block and the self-locking groove, and the engagement of the locking rack and the helical teeth, enhances the locking force and anti-loosening capability under vibration, impact, or variable load conditions. Furthermore, the design of the self-locking block and the connecting through groove allows for quick alignment and installation without complex tools or precise adjustments. This results in outstanding vibration and impact resistance, maintaining stable operation under impact loads. This addresses the problems of existing locking couplings, which lack self-locking and anti-loosening capability, leading to easy loosening under vibration due to traditional threaded connections, requiring regular preload checks, and necessitating precise alignment and axial movement during installation of rigid couplings—problems that are time-consuming and prone to errors.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a locking coupling, including a main shaft sleeve and a main body for coupling rotation; A groove is formed inside the main shaft sleeve to improve stability. A spline is embedded inside the groove. An inner abutment block is fixedly installed on the outside of the spline. A shaft sleeve is fixedly installed on one side of the outer side of the inner abutment block. A self-locking block is fixedly installed on the other side of the outer side of the inner abutment block. Self-locking grooves are formed on the upper and lower sides of the outer side of the self-locking block. Connecting through grooves are formed on the upper and lower sides of the outer side of the main shaft sleeve. A self-inserting block is embedded inside the connecting through groove. The locking buckles are all fixedly installed on the outside of the main shaft sleeve for self-locking with the driven shaft sleeve. The external thread of the locking buckle is connected to a splicing plate, and the splicing plate is fixedly installed with helical teeth. A driven shaft sleeve is provided on the outer side of the main shaft sleeve, and a lock head is fixedly installed on the outside of the driven shaft sleeve. A locking rack is fixedly installed on the outside of the lock head.

[0008] Preferably, the spline fixedly installed on the outside of the inner contact block engages with the groove opened inside the spindle sleeve, and the spline and the groove are used in conjunction.

[0009] Preferably, the shaft sleeve has two clamping grooves on its outside, and a shaft clamp is sleeved on the outside of the two clamping grooves.

[0010] Preferably, the external thread of the shaft clamp is threaded through a double-ended bolt, and the internal sleeve of the shaft sleeve is fitted with a drive shaft.

[0011] Preferably, a buffer pad is provided on the outside of the self-locking block, and a linkage sleeve is fixedly installed on both sides of the outside of the buffer pad. The linkage sleeve is used in conjunction with the self-locking block.

[0012] Preferably, the driven bushing is in contact with the main bushing, and the latch corresponds to the locking rack.

[0013] The technical effects and advantages provided by this utility model in the above technical solution are as follows: This utility model includes an inner contact block, a self-locking block, a self-locking groove, a connecting through groove, a self-inserting block, a locking buckle, a driven bushing, and a locking head. When using this locking coupling, the driving shaft and driven shaft are respectively installed on the shaft sleeves. Then, the self-inserting block passes through the connecting through groove and abuts against the self-locking groove of the self-locking block, thereby fixing the self-locking block in the position of the main bushing and the driven bushing. Then, when the main bushing and the driven bushing are mated, simply align the locking teeth of the locking head with the locking buckle. As the main bushing and the driven bushing are advanced, the helical teeth engage with the locking teeth. The self-locking mechanism is achieved through the interlocking of the self-locking block and the self-locking groove, which gives the locking coupling a self-locking and anti-loosening capability. Through the mechanical interlocking of the self-locking block and the self-locking groove, and the engagement of the locking rack and the helical teeth, a multi-stage locking mechanism is formed. Under vibration, impact, or variable load conditions, the locking force and anti-loosening capability are improved. Moreover, the design of the self-locking block and the connecting groove allows for quick alignment and installation without the need for complex tools or precise adjustments. This makes the locking coupling have outstanding vibration and impact resistance performance and can maintain stable use under impact loads. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a top view of the structure of this utility model; Figure 3 This is a schematic diagram of the shaft clamp structure of this utility model; Figure 4 This is a schematic diagram of the self-locking block structure of this utility model; Figure 5 This is a schematic diagram of the locking rack structure of this utility model.

[0016] Explanation of reference numerals in the attached figures: 1. Main shaft sleeve; 2. Groove; 3. Spline; 4. Inner contact block; 5. Shaft sleeve; 6. Clamping groove; 7. Shaft clamp; 8. Double-ended bolt; 9. Drive shaft; 10. Self-locking block; 11. Self-locking groove; 12. Connecting through groove; 13. Self-insertion block; 14. Buffer pad; 15. Linkage sleeve; 16. Locking buckle; 17. Splicing plate; 18. Helical gear; 19. Driven shaft sleeve; 20. Lock head; 21. Locking rack. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0018] This utility model provides, for example Figure 1-5 The locking coupling shown includes a main shaft sleeve 1, which is the main body for the coupling rotation; The groove 2 is formed inside the main shaft sleeve 1 to improve stability. The groove 2 is inlaid with a spline 3. An inner abutment block 4 is fixedly installed on the outside of the spline 3. A shaft sleeve 5 is fixedly installed on one side of the outer side of the inner abutment block 4. A self-locking block 10 is fixedly installed on the other side of the outer side of the inner abutment block 4. A self-locking groove 11 is formed on the upper and lower sides of the outer side of the self-locking block 10. A connecting through groove 12 is formed on the upper and lower sides of the outer side of the main shaft sleeve 1. A self-inserting block 13 is inlaid inside the connecting through groove 12. All locking buckles 16 are fixedly installed on the outside of the main shaft sleeve 1 for self-locking with the driven shaft sleeve 19. The external thread of the locking buckle 16 is connected to the splicing plate 17, and the splicing plate 17 is fixedly installed with helical teeth 18. The driven shaft sleeve 19 is provided on the outer side of the main shaft sleeve 1. The external of the driven shaft sleeve 19 is fixedly installed with a locking head 20, and the external of the locking head 20 is fixedly installed with a locking rack 21. When the main shaft sleeve 1 and the driven shaft sleeve 19 are connected, the locking rack 21 of the locking head 20 only needs to be aligned with the locking buckle 16. As the main shaft sleeve 1 and the driven shaft sleeve 19 are pushed forward, the helical teeth 18 are locked in the locking rack 21 to complete the self-locking. This design gives the locking coupling a self-locking and anti-loosening capability.

[0019] like Figure 1 , Figure 2 and Figure 3 As shown, the spline 3 fixedly installed on the outside of the inner contact block 4 engages with the groove 2 opened inside the main shaft sleeve 1. The spline 3 and the groove 2 work together to further fix the inner contact block 4 in the main shaft sleeve 1, reducing the impact of vibration on the overall locking coupling. The shaft sleeve 5 has two clamping grooves 6 on its outside, and shaft clamps 7 are sleeved on the outside of the two clamping grooves 6. The two relatively distributed shaft clamps 7 increase the clamping force of the shaft sleeve 5 on the driving shaft 9 and the driven shaft, reducing the probability of shaft disengagement. The external thread of the shaft clamp 7 is threaded through by a double-ended bolt 8. The driving shaft 9 is sleeved inside the shaft sleeve 5. The overall structure of the shaft clamp 7 is simple and easy to operate, and it is also convenient for maintenance personnel to replace it in time if a fault occurs.

[0020] like Figure 1 , Figure 4 and Figure 5As shown, a buffer pad 14 is provided on the outside of the self-locking block 10, and a linkage sleeve 15 is fixedly installed on both sides of the buffer pad 14. The linkage sleeve 15 is used in conjunction with the self-locking block 10. Through the mechanical interlock between the self-locking block 10 and the self-locking groove 11, the engagement of the locking rack 21 and the helical tooth 18 forms a multi-stage locking mechanism. Under vibration, impact or variable load conditions, the locking force and anti-loosening ability are improved. The driven shaft sleeve 19 is in contact with the main shaft sleeve 1. The locking buckle 16 corresponds to the locking rack 21. The locking buckle 16 can be opened by disassembling the splicing plate 17, which facilitates disassembly after the locking coupling is completed.

[0021] The working principle of this practical coupling is as follows: First, take out the locking coupling and install the shaft sleeves 5 on the driving shaft 9 and driven shaft respectively. Two relatively distributed shaft clamps 7 are fitted into the clamping grooves 6, increasing the clamping force of the shaft sleeves 5 on the driving shaft 9 and driven shaft, reducing the probability of shaft slippage. Then, through the engagement of the groove 2 and spline 3, the inner contact block 4 is fixed in the main shaft sleeve 1, reducing the impact of vibration on the overall locking coupling. Next, the self-inserting block 13 passes through the connecting groove 12 and abuts against the self-locking groove 11 of the self-locking block 10, thereby fixing the self-locking block 10 in the position of the main shaft sleeve 1 and driven shaft sleeve 19. Before merging the main shaft sleeve 1 and driven shaft sleeve 19, a buffer pad 14 and a linkage sleeve 15 are fitted on the outside of the self-locking block 10. This absorbs the vibration energy of the shaft system and reduces the impact of high-frequency vibration on the self-locking block 10. Then, when merging the main shaft sleeve 1 and driven shaft sleeve 19, only the locking head 2 needs to be engaged. Align the locking rack 21 with the locking buckle 16. As the main shaft sleeve 1 and driven shaft sleeve 19 are advanced, the helical tooth 18 engages in the locking rack 21, thus completing self-locking. This design gives the locking coupling a self-locking and anti-loosening capability. Through the mechanical interlocking of the self-locking block 10 and the self-locking groove 11, the engagement of the locking rack 21 and the helical tooth 18 forms a multi-stage locking mechanism. Under vibration, impact, or variable load conditions, the locking force and anti-loosening capability are improved. Moreover, the design of the self-locking block 10 and the connecting through groove 12 enables quick alignment and installation without the need for complex tools or precise adjustments. Furthermore, when disassembling the locking coupling, simply remove the splicing plate 17 of the locking buckle 16 with bolts to remove the self-locking helical tooth 18, thus completing the disassembly of the locking coupling. Finally, after completing the installation and use of the locking coupling according to the above operations, routine maintenance of the device is required. This completes the use of the locking coupling.

[0022] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A locking coupling, characterized in that: include Main shaft sleeve (1), the main body used for coupling rotation; The groove (2) is opened inside the main shaft sleeve (1) to improve stability. The groove (2) is inlaid with a spline (3). An inner abutment block (4) is fixedly installed on the outside of the spline (3). A shaft sleeve (5) is fixedly installed on one side of the outer side of the inner abutment block (4). A self-locking block (10) is fixedly installed on the other side of the outer side of the inner abutment block (4). A self-locking groove (11) is opened on the upper and lower sides of the self-locking block (10). A connecting through groove (12) is opened on the upper and lower sides of the outer side of the main shaft sleeve (1). A self-inserting block (13) is inlaid inside the connecting through groove (12). The latches (16) are all fixedly installed on the outside of the main bushing (1) for self-locking with the driven bushing (19). The latches (16) are threadedly connected to the outside of the splicing plate (17). The splicing plate (17) is fixedly installed with helical teeth (18). The driven bushing (19) is provided on one side of the outside of the main bushing (1). The driven bushing (19) is fixedly installed with a lock head (20) on the outside of each driven bushing (19). The lock head (20) is fixedly installed with a locking rack (21) on the outside of each lock head (20).

2. The locking coupling according to claim 1, characterized in that: The spline (3) fixedly installed on the outside of the inner contact block (4) engages with the groove (2) opened inside the spindle sleeve (1), and the spline (3) and the groove (2) are used together.

3. A locking coupling according to claim 1, characterized in that: The shaft sleeve (5) has two clamping grooves (6) on its outside, and shaft clamps (7) are sleeved on the outside of the two clamping grooves (6).

4. A locking coupling according to claim 3, characterized in that: The external thread of the shaft clamp (7) is threaded through a double-ended bolt (8), and the internal part of the shaft sleeve (5) is fitted with a drive shaft (9).

5. A locking coupling according to claim 1, characterized in that: The self-locking block (10) is provided with a buffer pad (14) on the outside, and a linkage sleeve (15) is fixedly installed on both sides of the buffer pad (14). The linkage sleeve (15) is used in conjunction with the self-locking block (10).

6. A locking coupling according to claim 1, characterized in that: The driven bushing (19) abuts against the main bushing (1), and the latch (16) corresponds to the locking rack (21).

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