Modular mechanical drive shaft quick positioning device

Abstract

The utility model relates to mechanical drive technical field, concretely relates to a modularization mechanical transmission shaft quick positioning device, and this device aims at solving the problem of traditional transmission shaft connecting mode dismouting complicated, length adjustment is inconvenient. It is mainly by first axle sleeve, second axle sleeve, spring positioning pin and modularization extension axle section composition, first axle sleeve one end is equipped with outer spline, and second axle sleeve one end is equipped with the matching inner spline groove, and both realize the periphery positioning and torque transmission through the spline insertion, when the spline is completely engaged, the radial positioning hole and radial locking hole on two axle sleeves are aligned, and axial locking and radial auxiliary positioning are realized through the insertion spring positioning pin, and the modularization extension axle section both ends are equipped with the same connecting structure with above axle sleeve, can be flexibly connected in series to expand the shafting length. The utility model has the outstanding advantages that structure is compact, dismouting is quick, positioning is accurate and modularization combination is nimble, especially suitable for the transmission system that needs to adjust or reconstruct frequently.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission technology, specifically a modular mechanical transmission shaft quick positioning device. Background Technology

[0002] In mechanical equipment, the drive shaft is a key component for transmitting power and torque. Traditional drive shaft connections typically employ methods such as flange bolt connections, key connections, or interference fits.

[0003] These connection methods have some drawbacks: the installation and disassembly process is cumbersome and time-consuming, requiring specialized tools and a large operating space; high alignment precision is required, making adjustment difficult; the connection structure is fixed, and the shaft length is not easily adjusted flexibly. In applications requiring frequent disassembly, maintenance, or adjustment of the shaft length according to working conditions, such as test benches, flexible production lines, and reconfigurable equipment, the limitations of traditional drive shafts are particularly prominent.

[0004] Therefore, there is an urgent need for a drive shaft device that can achieve rapid positioning, reliable connection, and modular expansion capability. Utility Model Content

[0005] In view of the shortcomings of the prior art, this utility model provides a modular mechanical transmission shaft quick positioning device, which overcomes the shortcomings of the prior art and solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a modular mechanical transmission shaft quick positioning device, comprising a bushing connection assembly, a radial positioning assembly, and a modular extension shaft section.

[0007] The bushing connection assembly includes a first bushing and a second bushing. One end of the first bushing has an external spline, and one end of the second bushing has an internal spline groove adapted to the external spline. The first bushing and the second bushing achieve precise circumferential positioning and effective torque transmission through the insertion and engagement of the external spline and the internal spline groove.

[0008] The radial positioning assembly includes a radial positioning hole on the first bushing, a radial locking hole on the second bushing, and a spring positioning pin. When the external spline and the internal spline groove are fully engaged, the radial positioning hole and the radial locking hole are coaxially aligned. At this time, inserting the spring positioning pin into the aligned hole ensures reliable axial fixation of the first bushing and the second bushing, and provides additional radial auxiliary positioning to prevent loosening or separation under vibration.

[0009] The modular extension shaft section is used to extend the length of the drive shaft. One end of it has the same internal spline groove and radial locking hole as the second bushing, and the other end has the same external spline and radial positioning hole as the first bushing. By inserting one modular extension shaft section between two bushing assemblies, or by connecting multiple extension shaft sections in series, drive shaft systems of different lengths can be flexibly and quickly constructed.

[0010] As a preferred embodiment of this invention, the end of the external spline is provided with a guide cone surface, and the entrance of the internal spline groove is provided with a chamfer. This design facilitates centering guidance during initial insertion and reduces assembly difficulty.

[0011] As a preferred embodiment of this utility model, the spring positioning pin includes a pin body, an operating head, a return spring, and an annular groove. The return spring provides the return force for the pin body. An elastic retaining ring is provided within the radial positioning hole or the radial locking hole. When the pin body is inserted into the correct position, the elastic retaining ring engages with the annular groove, locking the spring positioning pin in its current position and preventing it from accidentally dislodging due to vibration during equipment operation, thus ensuring a safe connection. The operating head can be in the form of a knob, button, or pull ring for easy manual operation.

[0012] As a preferred technical solution of this utility model, the first bushing, the second bushing, and the modular extension shaft section are all provided with process planes, which facilitates clamping and rotation operations using general tools such as wrenches, and is beneficial for assembly.

[0013] As a preferred technical solution of this utility model, the outer circumference of the first bushing and the second bushing is provided with scale markings, which can be used to intuitively indicate the depth of spline insertion or the relative rotation angle between the two bushings, so as to facilitate precise phase adjustment.

[0014] As a preferred technical solution of this utility model, the modular extension shaft section can be prefabricated in various standard length specifications (such as 100mm, 200mm, 500mm, etc.), and users can quickly select and combine them according to their needs, which greatly improves the flexibility and adaptability of the transmission shaft system.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. Rapid circumferential positioning is achieved through spline connection, and axial locking is achieved through spring positioning pin. The entire connection process does not require bolt tightening or heating press fitting, making the operation extremely simple and quick, and ensuring high centering accuracy.

[0017] 2. Standardized bushings and various specifications of extension shaft sections allow users to freely combine drive shafts of the required length and configuration, just like building blocks, to adapt to different equipment layouts and working conditions.

[0018] 3. The spline has a strong torque transmission capacity and good connection rigidity; the spring positioning pin has an anti-disengagement structure, which ensures the reliability of axial locking and can withstand certain vibration and impact loads.

[0019] 4. It has a simple structure and low manufacturing cost, and can be widely used in various mechanical equipment, experimental devices and teaching instruments that require power transmission and may be frequently adjusted. Attached Figure Description

[0020] Figure 1 This is a schematic diagram showing the connection state between the first bushing and the second bushing of this utility model;

[0021] Figure 2 This is a schematic diagram of the first bushing of this utility model;

[0022] Figure 3 This is a schematic diagram of the second bushing of this utility model;

[0023] Figure 4 This is a schematic cross-sectional view of the first bushing and the second bushing of this utility model;

[0024] Figure 5 For the present utility model Figure 4 Enlarged view of a portion of point A in the middle;

[0025] Figure 6 This is a schematic diagram illustrating the use of a modular extension shaft segment for connection in this utility model.

[0026] In the figure: 1. First bushing; 11. External spline; 111. Guide cone surface; 12. Radial positioning hole; 2. Second bushing; 21. Internal spline groove; 211. Chamfer; 22. Radial locking hole; 3. Spring positioning pin; 31. Pin body; 32. Operating head; 33. Return spring; 34. Annular groove; 4. Modular extension shaft section; 5. Elastic retaining ring; 6. Process plane; 7. Scale marking. Detailed Implementation

[0027] 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.

[0028] Please see Figure 1-6 A modular mechanical transmission shaft quick positioning device mainly consists of a first bushing 1, a second bushing 2, a spring positioning pin 3, and a modular extension shaft section 4.

[0029] One end of the first bushing 1 is machined with an external spline 11, and the end of the external spline 11 is designed with a guide cone surface 111. A radial locating hole 12 is drilled at an appropriate position on the first bushing 1. One end of the second bushing 2 is machined with an internal spline groove 21 that precisely mates with the external spline 11, and the entrance of the internal spline groove 21 is chamfered 211. A radial locking hole 22 is drilled at a corresponding position on the second bushing 2. The other ends of the first bushing 1 and the second bushing 2 are usually designed as standard shaft connection interfaces, such as keyways, flanges, or threads, for connecting power sources, loads, or other shaft segments.

[0030] The spring positioning pin 3 consists of a pin body 31, an operating head 32, a return spring 33, and an annular groove 34. The return spring 33 is fitted onto the pin body 31. An elastic retaining ring 5 is installed in the radial positioning hole 12 (or the radial locking hole 22).

[0031] During assembly, first align the outer spline 11 of the first bushing 1 with the inner spline groove 21 of the second bushing 2, and easily insert it using the guiding action of the guide cone surface 111 and the chamfer 211. When the outer spline 11 is fully inserted into the bottom of the inner spline groove 21, i.e., when the two are fully engaged, the radial positioning hole 12 on the first bushing 1 and the radial locking hole 22 on the second bushing 2 are precisely aligned. Then, press or rotate the operating head 32 to overcome the elastic force of the return spring 33 and insert the pin 31 of the spring positioning pin 3 into the aligned radial positioning hole 12 and radial locking hole 22. When the pin 31 is inserted into place, the annular groove 34 on it moves to the position corresponding to the elastic retaining ring 5 in the hole. Under its own elastic force, the elastic retaining ring 5 is engaged in the annular groove 34, thereby locking the spring positioning pin 3 and completing the quick connection and fixation of the two bushings. During disassembly, simply reverse the operation and pull out the spring positioning pin 3 to separate the bushings; the process is equally quick.

[0032] When a longer drive shaft is required, such as Figure 4 and Figure 5 As shown, one or more modular extension shaft segments 4 can be used. The two ends of the modular extension shaft segment 4 replicate the internal spline connection end of the second bushing 2 and the external spline connection end of the first bushing 1, respectively. For example, by inserting the external spline 11 of the first bushing 1 into the internal spline groove of one end of the modular extension shaft segment 4 and locking it with a spring locating pin 3; then by inserting the external spline of the other end of the modular extension shaft segment 4 into the internal spline groove 21 of the second bushing 2 and locking it with another spring locating pin 3, the shaft length can be extended. By connecting different numbers and specifications of modular extension shaft segments 4 in series, a drive shaft system of any required length can be flexibly constructed.

[0033] In addition, process planes 6 are machined on the outer surfaces of the first bushing 1, the second bushing 2, and the modular extension shaft section 4 to facilitate assembly using a wrench. Scale markings 7 are also engraved on the outer circular surfaces of the first bushing 1 and the second bushing 2. In situations requiring precise control of the relative rotation angle between the two shafts (such as phase adjustment), fine adjustments can be made by observing the scale markings, and then the spring locating pin 3 can be inserted to lock the shaft.

[0034] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 according to the specific circumstances.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 modular mechanical transmission shaft rapid positioning device, characterized in that, include: A bushing connection assembly includes a first bushing (1) and a second bushing (2). One end of the first bushing (1) is provided with an external spline (11), and one end of the second bushing (2) is provided with an internal spline groove (21) adapted to the external spline (11). The first bushing (1) and the second bushing (2) achieve circumferential positioning and torque transmission through the insertion of the external spline (11) and the internal spline groove (21). The radial positioning assembly includes a radial positioning hole (12) disposed in the first bushing (1), a radial locking hole (22) disposed in the second bushing (2), and a spring positioning pin (3). The radial positioning hole (12) and the radial locking hole (22) are coaxially aligned when the outer spline (11) and the inner spline groove (21) are fully inserted. The spring positioning pin (3) can be inserted into the radial positioning hole (12) and the radial locking hole (22) to achieve axial fixation and radial auxiliary positioning of the first bushing (1) and the second bushing (2). The modular extension shaft section (4) has an inner spline groove (21) and a radial locking hole (22) at one end, which are the same as those of the second bushing (2), and an outer spline (11) and a radial positioning hole (12) at the other end, which are the same as those of the first bushing (1).

2. The modular mechanical transmission shaft rapid positioning device according to claim 1, characterized in that: The end of the external spline (11) is provided with a guide cone surface (111), and the entrance of the internal spline groove (21) is provided with a chamfer (211).

3. The modular mechanical transmission shaft rapid positioning device according to claim 1, characterized in that: The spring positioning pin (3) includes a pin body (31), an operating head (32) disposed at one end of the pin body (31), a reset spring (33) sleeved on the pin body (31), and an annular groove (34) disposed on the pin body (31). The radial positioning hole (12) or the radial locking hole (22) is provided with an elastic retaining ring (5) that cooperates with the annular groove (34) to prevent the spring positioning pin (3) from coming out.

4. The modular mechanical transmission shaft quick positioning device according to claim 3, characterized in that: The operating head (32) can be a knob, a button, or a pull ring.

5. The modular mechanical transmission shaft rapid positioning device according to claim 1, characterized in that: The first bushing (1), the second bushing (2), and the modular extension shaft section (4) are all provided with a process plane (6) for external tool clamping.

6. The modular mechanical transmission shaft quick positioning device according to claim 1, characterized in that: The first bushing (1) and the second bushing (2) are provided with scale markings (7) on their outer circumferences to indicate the depth or relative angle position of the spline insertion.

7. The modular mechanical transmission shaft quick positioning device according to claim 1, characterized in that: The modular extension shaft section (4) is available in a variety of standard length specifications.

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