A compact built-in coupling transmission structure

Abstract

The application discloses a compact built-in coupling transmission structure and belongs to the field of motor equipment, and solves the problem that the elastic sleeve pin coupling in the prior art has high requirement on installation space and the structural strength is difficult to guarantee. In the application, the coupling structure comprises a driven-side coupling and a driving-side coupling; the driving-side coupling is installed on the driving-side shaft end and is fixed relative to the driving-side shaft end; the driven-side coupling is installed on the driven-side shaft end and is fixed relative to the driven-side shaft end; the side of the driven-side coupling facing the driving-side shaft end is provided with an accommodation space for accommodating the driving-side coupling; and the driving-side coupling is inserted into the accommodation space and is in transmission connection with the driven-side coupling. The compact built-in coupling transmission structure reduces the required installation space and the overall axial dimension of the equipment.

Description

Technical Field

[0001] This utility model relates to a compact built-in coupling transmission structure, belonging to the field of motor devices. Background Technology

[0002] A coupling, also known as a shaft coupling, is a mechanical component used to securely connect the driving and driven shafts in different mechanisms, enabling them to rotate together and transmit motion and torque. It is sometimes also used to connect shafts to other parts (such as gears, pulleys, etc.). It is usually composed of two halves, each connected by a key or tight fit to one end of the shaft, and then joined together in some way.

[0003] Most commonly used couplings are standardized or pre-defined. Generally, it is only necessary to correctly select the type, model, and dimensions of the coupling. If necessary, the load capacity of its vulnerable parts can be checked and calculated. At high speeds, it is also necessary to check the centrifugal force on its outer edge and the deformation of the elastic element, and perform balance verification, etc.

[0004] Existing standard flexible sleeve pin couplings require sufficient shaft extension on the driven side for installation, leaving ample installation space. This high space requirement impacts the overall size of the transmission structure. Furthermore, the pin and coupling are assembled separately, not cast as a single piece, making it difficult to guarantee structural strength. Utility Model Content

[0005] This invention provides a compact built-in coupling transmission structure, which reduces the installation space required and the overall axial dimension of the equipment.

[0006] The technical solution adopted by this utility model is a compact built-in coupling transmission structure, including a driving side and a driven side. The driving side has a driving side shaft end, and the driven side has a driven side shaft end. There is a coupling structure between the driving side shaft end and the driven side shaft end, and the transmission is carried out through the coupling structure.

[0007] The coupling structure includes a driven-side coupling and a driving-side coupling; the driving-side coupling is mounted on the driving-side shaft end and fixed relative to the driving-side shaft end; the driven-side coupling is mounted on the driven-side shaft end and fixed relative to the driven-side shaft end.

[0008] The driven-side coupling has a receiving space on the side facing the driving-side shaft end to accommodate the driving-side coupling. The driving-side coupling is inserted into the receiving space and is connected to the driven-side coupling in a transmission manner.

[0009] The optimized, compact built-in coupling transmission structure described above has a connecting cavity built in the middle of the drive-side coupling to accommodate the drive-side shaft end; the drive-side shaft end is inserted into the connecting cavity and connected by a flat key.

[0010] The optimized compact built-in coupling transmission structure described above has several set screws on the drive-side coupling, and the drive-side coupling is fixed to the drive-side shaft end by the set screws.

[0011] In the optimized, compact built-in coupling transmission structure described above, a connecting hole is constructed in the middle of the driven-side coupling to accommodate the driven-side shaft end. A fine-pitch internal thread is constructed on the inner wall of the connecting hole, and a fine-pitch external thread is constructed on the surface of the driven-side shaft end. The driven-side shaft end is installed in the connecting hole and threadedly connected to the connecting hole.

[0012] The optimized, compact built-in coupling transmission structure described above has a number of driven-side coupling protrusions at the end of the driven-side coupling facing the driving side. All the driven-side coupling protrusions are arranged in a ring around the shaft of the driven-side coupling, and all the driven-side coupling protrusions form a receiving space to accommodate the driving-side coupling.

[0013] The side surface of the drive-side coupling has an opening groove that mates with the protruding end of the driven-side coupling. After the drive-side coupling is inserted into the receiving space, a portion of the protruding end of the driven-side coupling is engaged in the opening groove.

[0014] The optimized, compact built-in coupling transmission structure has an elastic sleeve fitted onto the protruding end of the driven-side coupling.

[0015] In the optimized, compact built-in coupling transmission structure, the threaded fastening direction of the driven side shaft end installed in the connecting hole is the same as the rotation direction of the driving side shaft end during operation.

[0016] In the optimized, compact built-in coupling transmission structure, the driven-side coupling and the protruding end of the driven-side coupling are integrally formed.

[0017] The advantages of this application are as follows: In the technical solution of this application, the driven-side coupling is designed as an internal thread type, connected to the shaft via a fine-pitch thread. The thread tightening direction is the same as the direction of rotation of the water pump during operation, achieving self-locking and preventing loosening. After the drive-side coupling and the driven-side coupling are assembled separately, alignment and positioning are completed through the stop of the motor and bearing bracket, eliminating the need for additional alignment tools or fixtures. After assembly, the motor shaft, drive-side coupling, driven-side coupling, and bearing bracket shaft fully utilize the assembly space, shortening the required axial distance by approximately 50% compared to the installation of a standard flexible pin coupling, thus reducing the installation space required and the overall axial dimension of the equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this application;

[0019] Figure 2 This is a schematic diagram of the drive side structure of this application;

[0020] Figure 3 This is a schematic diagram of the installation structure of the drive-side coupling in this application;

[0021] Figure 4 This is a schematic diagram of the driven side of this application;

[0022] Figure 5 This is a schematic diagram of the installation structure of the driven-side coupling of this application. Detailed Implementation

[0023] The technical features of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] As shown in the figure, this utility model is a compact built-in coupling transmission structure, including a driving side and a driven side. The driving side has a driving side shaft end 1, and the driven side has a driven side shaft end 2. The driving side shaft end 1 and the driven side shaft end 2 are connected by a coupling structure and are transmitted through the coupling structure.

[0025] In one embodiment of this application, the compact built-in coupling transmission structure of this application is applied to the coupling transmission between the pump body and the motor. This example will be used to describe the structure and application of this application in detail. The driven side is the pump body, and the driving side is the motor. Driven side shaft end 1 is the shaft end of the motor's power output shaft, and driven side shaft end 2 is the power input shaft end of the pump body.

[0026] The coupling structure of this application includes a driven-side coupling 3 and a driving-side coupling 4. The driving-side coupling 4 is mounted on the driving-side shaft end 1 and fixed relative to it. The driven-side coupling 3 is mounted on the driven-side shaft end 2 and fixed relative to it. The specific structure is as follows.

[0027] In one embodiment of this application, the drive-side coupling 4 has a connecting cavity in its middle portion to accommodate the drive-side shaft end 1. The drive-side shaft end 1 is inserted into the connecting cavity and connected via a flat key 5. The drive-side coupling 4 has several set screws 6, which fix the drive-side coupling 4 to the drive-side shaft end 1.

[0028] The set screw 6 and its mating structure can adopt common structures in the existing technology. For example, a threaded through hole is opened on the side wall of the drive-side coupling 4, the set screw 6 is connected in the threaded through hole and the top end of the set screw 6 is in tight contact with the side surface of the drive-side shaft end 1, thereby fixing the drive-side coupling 4 and the drive-side shaft end 1.

[0029] In one embodiment of this application, the driven-side coupling 3 has a connecting hole in its middle to accommodate the driven-side shaft end 2. The inner wall of the connecting hole has a fine-pitch internal thread, and the surface of the driven-side shaft end 2 has a fine-pitch external thread. The driven-side shaft end 2 is installed in the connecting hole and threadedly connected to it, with grease applied to the threads. The thread tightening direction of the driven-side shaft end 2 installed in the connecting hole is the same as the rotation direction of the driving-side shaft end 1 during operation, thereby ensuring that the coupling maintains a self-locking state during pump operation.

[0030] As shown in the figure, in one embodiment of this application, the driven-side coupling 3 has a receiving space for accommodating the driving-side coupling 4 on the side facing the driving-side shaft end 1. The driving-side coupling 4 is inserted into the receiving space and is connected to the driven-side coupling 3 in a transmission manner.

[0031] The driven-side coupling 3 has several driven-side coupling protrusions 7 at its end facing the driving side. All the driven-side coupling protrusions 7 are arranged in a ring around the shaft of the driven-side coupling 3, forming a receiving space to accommodate the driving-side coupling 4. An elastic sleeve 701 is fitted onto the driven-side coupling protrusions 7.

[0032] The side surface of the drive-side coupling 4 has an opening groove that mates with the protruding end 7 of the driven-side coupling. After the drive-side coupling 4 is inserted into the receiving space, a portion of the protruding end 7 of the driven-side coupling is engaged in the opening groove.

[0033] In one embodiment of this application, the driven-side coupling 3 and the driven-side coupling protrusion 7 are integrally formed.

[0034] In other embodiments of this application, the driven-side coupling 3 and the driven-side coupling protrusion 7 can be manufactured separately and then combined by bolting, welding or other connection methods.

[0035] The specific assembly steps of the compact built-in coupling transmission structure of this application are as follows:

[0036] Step S1): Install the drive-side coupling 4 onto the shaft of the IEC motor and tighten it using a flat key and two set screws. Axial positioning is determined according to the specific coupling model.

[0037] In step S2), the driven-side coupling 3 is installed onto the driven-side shaft end 2 via a fine-pitch thread, and bolt grease is applied to the thread. The elastic sleeve 701 is then installed onto the cylinder of the protruding end 7 of the driven-side coupling. The thread tightening direction is the same as the working direction of the water pump during operation, thereby ensuring that the coupling remains in a self-locking state during pump operation.

[0038] Step S3) involves assembling the components completed in steps S1) and S2) together using stoppers and bolts, thus completing the assembly. The coupling is located inside the equipment, featuring a compact and safe structure.

[0039] Of course, the above description is not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should be protected by the present utility model.

Claims

1. A compact built-in coupling transmission structure, comprising a driving side and a driven side, the driving side having a driving side shaft end (1), the driven side having a driven side shaft end (2), and a coupling structure between the driving side shaft end (1) and the driven side shaft end (2) for transmission; characterized in that: The coupling structure includes a driven-side coupling (3) and a driving-side coupling (4); the driving-side coupling (4) is mounted on the driving-side shaft end (1) and fixed relative to the driving-side shaft end (1); the driven-side coupling (3) is mounted on the driven-side shaft end (2) and fixed relative to the driven-side shaft end (2); The driven-side coupling (3) has a receiving space for accommodating the driving-side coupling (4) on the side facing the driving-side shaft end (1). The driving-side coupling (4) is inserted into the receiving space and is connected to the driven-side coupling (3) in a transmission manner.

2. The compact built-in coupling transmission structure according to claim 1, characterized in that: The drive-side coupling (4) has a connecting cavity in the middle to accommodate the drive-side shaft end (1); the drive-side shaft end (1) is inserted into the connecting cavity and connected by a flat key (5).

3. The compact built-in coupling transmission structure according to claim 2, characterized in that: The drive-side coupling (4) has several set screws (6), and the drive-side coupling (4) is fixed to the drive-side shaft end (1) by the set screws (6).

4. The compact built-in coupling transmission structure according to claim 1, characterized in that: The driven side coupling (3) has a connecting hole in the middle to accommodate the driven side shaft end (2). The inner wall of the connecting hole has a fine internal thread, and the surface of the driven side shaft end (2) has a fine external thread. The driven side shaft end (2) is installed in the connecting hole and threadedly connected to the connecting hole.

5. The compact built-in coupling transmission structure according to claim 1, characterized in that: The driven side coupling (3) has a number of driven side coupling protrusions (7) at the end facing the driving side. All the driven side coupling protrusions (7) are arranged in a ring around the shaft of the driven side coupling (3), and all the driven side coupling protrusions (7) form a receiving space to accommodate the driving side coupling (4). The side surface of the drive-side coupling (4) has an opening groove that mates with the protruding end (7) of the driven-side coupling. After the drive-side coupling (4) is inserted into the receiving space, a portion of the protruding end (7) of the driven-side coupling is inserted into the opening groove.

6. The compact built-in coupling transmission structure according to claim 1, characterized in that: An elastic sleeve (701) is fitted onto the protruding end (7) of the driven side coupling.

7. The compact built-in coupling transmission structure according to claim 4, characterized in that: The threaded fastening direction of the driven side shaft end (2) installed in the connecting hole is the same as the rotation direction of the driving side shaft end (1) during operation.

8. The compact built-in coupling transmission structure according to claim 5, characterized in that: The driven side coupling (3) and the driven side coupling protrusion (7) are integrally formed.

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