Quick connecting structure for shafts

Abstract

The utility model provides a quick shaft connecting structure, which belongs to the technical field of shaft connection and comprises a thick shaft and a thin shaft, and the thick shaft is positioned on one horizontal side of the thin shaft. The positioning blind hole is formed in the central position of one end of the thick shaft and is matched with the thin shaft; the clamping ring groove is formed in the position, close to the outer side of the positioning blind hole, of the outer side wall of the thick shaft; the clamping ring is embedded and clamped in the clamping ring groove; the two limiting holes are symmetrically formed in the inner side wall of the clamping ring groove; the positioning pin is inserted into the limiting hole; the limiting grooves are symmetrically formed in the outer side wall of the thin shaft; according to the utility model, the insertion part of the thick shaft and the thin shaft is locked by the positioning pin in an embedded manner, and the two ends of the positioning pin are limited by the clamping rings, so that the insertion part of the thick shaft and the thin shaft is in a positioning and limiting state while the positioning pin is prevented from falling off, the shaft connection operation is simple and convenient, a specific tool is not needed, and the time required by shaft connection is saved.

Description

Technical Field

[0001] This utility model belongs to the field of shaft connection technology, specifically relating to a quick connection structure for shafts. Background Technology

[0002] Shaft connections are used to connect adjacent shafts through a connection structure. Existing shaft connections are divided into mechanical locking, friction locking, and coupling types.

[0003] Since locking-type connections require the use of locking structures for shaft connections, these structures inevitably use fasteners. The disassembly and assembly of these fasteners require specific tools, which increases the complexity and time required for shaft connection operations, making quick connections inconvenient.

[0004] Therefore, a shaft-type quick connection structure is proposed. Summary of the Invention

[0005] This utility model provides a quick connection structure for shafts, the purpose of which is to solve the problems mentioned above.

[0006] This utility model provides a quick-connect structure for shafts, including a thick shaft and a thin shaft, with the thick shaft located on the horizontal side of the thin shaft; a positioning blind hole located at the center of one end of the thick shaft and matching the thin shaft; a retaining ring groove located on the outer side wall of the thick shaft near the outer side of the positioning blind hole; a retaining ring embedded and engaged inside the retaining ring groove; two limiting holes symmetrically provided on the inner side wall of the retaining ring groove; a positioning pin inserted into the limiting holes; and limiting grooves symmetrically provided on the outer side wall of the thin shaft.

[0007] Furthermore, the retaining ring has a notch, and the retaining ring is adapted to the retaining ring groove; the retaining ring is a shaft retaining spring.

[0008] Furthermore, the positioning pin does not protrude from the limiting hole, and both ends of the positioning pin are provided with arc surfaces, which precisely fit the inner sidewall of the retaining ring.

[0009] Furthermore, the limiting hole is connected to the positioning blind hole, and a portion of the limiting hole passes through the positioning blind hole.

[0010] Furthermore, the cross-section of the limiting groove is a semi-circular structure, and the inner wall of the limiting groove is attached to the outer wall of the positioning pin.

[0011] Furthermore, the outer wall of the thick shaft and the inner wall of the retaining ring groove are both provided with rounded corners.

[0012] The beneficial effects of this utility model are as follows:

[0013] This invention uses a positioning pin to lock the joint between the thick and thin shafts, and a retaining ring to limit the two ends of the positioning pin, preventing the positioning pin from falling off while keeping the joint between the thick and thin shafts in a positioning and limiting state, thereby achieving the purpose of connection. The shaft connection operation is simple and convenient. Just rotate the inserted thin shaft to allow the positioning pin to be inserted, and then snap the retaining ring into the retaining ring groove. No special tools are required, saving the time required for shaft connection and facilitating batch processing.

[0014] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of an embodiment of the present utility model;

[0018] Figure 3 This is a schematic diagram of the retaining ring structure according to an embodiment of the present utility model;

[0019] Figure 4 This is a schematic diagram of the coarse shaft structure according to an embodiment of the present utility model;

[0020] Figure 5 This is a front view of an embodiment of the present utility model;

[0021] Reference numerals in the attached diagram: 1. Thick shaft; 2. Thin shaft; 3. Snap ring; 4. Locating pin; 5. Locating blind hole; 6. Limiting hole; 7. Snap ring groove; 8. Limiting groove. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0023] Reference Figure 1-5 This utility model embodiment proposes a quick-connect structure for shafts, including a thick shaft 1 and a thin shaft 2. The thick shaft 1 is located at one end of the thin shaft 2, and a positioning blind hole 5 is provided at the center of one end of the thick shaft 1. The positioning blind hole 5 is adapted to the thin shaft 2. A retaining ring groove 7 is provided on the outer side wall of the thick shaft 1 near the axially outer position of the positioning blind hole 5. Both the outer side wall of the thick shaft 1 and the inner side wall of the retaining ring groove 7 are provided with rounded corners. The rounded corners reduce the sharp edges and prevent hands from being cut during shaft connection operations. Two symmetrical limiting holes 6 are formed on the inner wall of the ring 3. The limiting holes 6 are connected to the positioning blind holes 5, and a part of the limiting holes 6 passes through the positioning blind holes 5. The connected structure allows the positioning pin 4 to be inserted into the limiting holes 6, with a part of the positioning pin 4 located in the positioning blind holes 5. The positioning pin 4 is inserted into the inside of both limiting holes 6. The positioning pin 4 does not protrude from the limiting holes 6, and both ends of the positioning pin 4 are provided with arc surfaces. The arc surfaces are precisely fitted to the inner wall of the retaining ring 3, so that the positioning pin 4 is fully embedded into the limiting holes. 6. This ensures the flatness of the inner wall of the retaining ring groove 7, thereby stabilizing the retaining ring 3 embedded in the retaining ring groove 7. This, in turn, limits the positioning pin 4, effectively preventing the positioning pin 4 from falling out of the limiting hole 6. The retaining ring 3 is embedded inside the retaining ring groove 7. The retaining ring 3 has a notch and is adapted to the retaining ring groove 7. The retaining ring 3 is a shaft retaining spring made of carbon spring steel. Through the notch on the retaining ring 3 and its elasticity, the notch on the retaining ring 3 becomes larger and fits into the retaining ring groove 7. To facilitate the installation of the retaining ring 3, a limiting groove 8 is provided on the outer side wall of the thin shaft 2 near the limiting hole 6 on the same axis. The limiting groove 8 has a semi-circular cross-section, and the inner side wall of the limiting groove 8 is in contact with the outer side wall of the positioning pin 4. When the thin shaft 2 is inserted into the positioning blind hole 5 on the thick shaft 1, the limiting hole 6 and the limiting groove 8 are on the same axis. When the positioning pin 4 is inserted into the limiting hole 6, a part of the positioning pin 4 passes through the limiting groove 8. At this time, the positioning pin 4 limits the thin shaft 2, realizing the initial positioning connection between the thin shaft 2 and the thick shaft 1.

[0024] The specific implementation method is as follows: When connecting the thick shaft 1 and the thin shaft 2, the thin shaft 2 is inserted into the positioning blind hole 5 on the thick shaft 1, and the thin shaft 2 is rotated axially so that the limiting groove 8 on the thin shaft 2 coincides with the limiting hole 6. At this time, the limiting hole 6 and the limiting groove 8 are located on the same axis. The positioning pin 4 is inserted into the limiting hole 6 and passes through the limiting groove 8. The thick shaft 1 and the thin shaft 2 are positioned and limited by the positioning pin 4. Then, the retaining ring 3 is deformed and fitted into the retaining ring groove 7. After the retaining ring 3 is fully embedded and engaged, the retaining ring 3 limits the positioning pin 4 to prevent the positioning pin 4 from falling out of the limiting hole 6, thus completing the quick connection of the thick shaft 1 and the thin shaft 2.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A quick-connect structure for shafts, characterized in that: It includes a thick shaft (1) and a thin shaft (2), wherein the thick shaft (1) is located on the horizontal side of the thin shaft (2); A positioning blind hole (5) is opened at the center of one end of the thick shaft (1) and matches the thin shaft (2); and A retaining ring groove (7) is formed on the outer side wall of the coarse shaft (1) near the outer side of the positioning blind hole (5); A retaining ring (3) is embedded and engaged inside the retaining ring groove (7); Two limiting holes (6) are symmetrically provided on the inner sidewall of the retaining ring groove (7); A positioning pin (4) inserted into the limiting hole (6); A limiting groove (8) is symmetrically opened on the outer side wall of the thin shaft (2).

2. The shaft quick-connect structure according to claim 1, characterized in that: The retaining ring (3) has a notch and is adapted to the retaining ring groove (7). The retaining ring (3) is a shaft retaining ring.

3. The shaft quick-connect structure according to claim 1, characterized in that: The positioning pin (4) does not protrude from the limiting hole (6), and both ends of the positioning pin (4) are provided with arc surfaces, which precisely fit the inner wall of the retaining ring (3).

4. The shaft quick-connect structure according to claim 1, characterized in that: The limiting hole (6) is connected to the positioning blind hole (5), and a portion of the limiting hole (6) passes through the positioning blind hole (5).

5. The shaft quick-connect structure according to claim 1, characterized in that: The cross-section of the limiting groove (8) is a semi-circular structure, and the inner wall of the limiting groove (8) is attached to the outer wall of the positioning pin (4).

6. The shaft quick-connect structure according to claim 1, characterized in that: The outer side wall of the coarse shaft (1) and the inner side wall of the retaining ring groove (7) are both provided with rounded corners.

Images