A transmission shaft limiting assembly

Abstract

The utility model relates to a kind of transmission shaft limiting assembly, including transmission shaft and transmission cover, transmission shaft end is installed on transmission cover by limiting member;Limiting member includes step screw, nut, bearing;Bearing is arranged around step screw;Nut is threadedly connected on step screw, and abuts on bearing;Transmission shaft end is provided with threaded hole;Step screw is threadedly connected in threaded hole;Bearing outer ring is connected to transmission cover, snap spring is installed on step screw;Snap spring is embedded on the transmission cover, and for limiting bearing, flat washer is installed on step screw;Flat washer abuts on bearing, solve the technical problem that the transmission shaft limiting structure in the prior art is mostly limited by single fastener or simple baffle, and the cooperation stability of limiting structure, transmission shaft and transmission cover is insufficient, prone to looseness in long-term operation, leading to limiting failure, and further causing transmission shaft displacement out-of-tolerance.

Description

Technical Field

[0001] This utility model relates to the field of drive shafts, and in particular to a drive shaft limiting component. Background Technology

[0002] As a core component of mechanical transmission systems, drive shafts are widely used in various mechanical devices such as electric equipment and construction machinery. Their operational stability directly affects the overall working efficiency and service life of the machine. In the assembly and application of drive shafts, it is necessary to precisely constrain their axial displacement using limiting structures to avoid problems such as decreased transmission accuracy and accelerated component wear caused by lateral movement of the drive shaft.

[0003] Existing drive shaft limiting structures mostly use a single fastener or a simple retaining ring for limiting, which has many technical defects: for example, the fit between the limiting structure and the drive shaft and drive cover is not stable enough, and it is easy to loosen during long-term operation, leading to limiting failure and thus causing the drive shaft displacement to exceed the tolerance. Utility Model Content

[0004] This application provides a drive shaft limiting component, which solves the technical problem that existing drive shaft limiting structures mostly use a single fastener or a simple retaining ring for limiting, and the fit between the limiting structure and the drive shaft and drive cover is not stable enough. During long-term operation, it is easy to loosen, leading to limiting failure and thus causing the drive shaft displacement to exceed the tolerance.

[0005] The technical solution adopted in this application is as follows.

[0006] A drive shaft limiting assembly includes a drive shaft and a drive cover. The end of the drive shaft is mounted on the drive cover via a limiting member. The limiting member includes a stepped screw, a nut, and a bearing. The bearing is arranged around the stepped screw. The nut is threaded onto the stepped screw and abuts against the bearing. The end of the drive shaft has a threaded hole. The stepped screw is threaded into the threaded hole. The outer ring of the bearing is connected to the drive cover.

[0007] As a further improvement to the above technical solution: A further technical solution is as follows: a retaining ring is installed on the stepped screw; the retaining ring is embedded in the transmission cover and is used to limit the bearing.

[0008] A further technical solution is as follows: a flat washer is installed on the stepped screw; the flat washer abuts against the bearing.

[0009] A further technical solution is that the bearing is embedded in the transmission cover.

[0010] One or more technical solutions provided in this application have at least the following technical effects or advantages: 1. Through the coordinated operation of multiple components in the limiting device, dual limiting of the drive shaft is achieved. The nut axially locks the bearing, and the snap ring provides secondary limiting of the bearing, effectively preventing axial movement of the bearing and drive shaft, thus solving the problem of limiting failure in existing technologies. Simultaneously, the bearing is embedded within the drive cover, and its threaded connection to the drive shaft, along with the stepped screw, ensures the stability of the connection between the limiting component and the drive shaft and drive cover, improving the operational stability of the transmission system. The bearing design converts the sliding friction during drive shaft rotation into rolling friction, significantly reducing frictional losses between components. The flat washer disperses the pressure during nut tightening, preventing damage to the bearing end face. The secondary limiting of the snap ring further reduces the axial force on the bearing. The coordinated action of all components effectively extends the service life of the limiting component and the drive shaft.

[0011] 2. All components of the limiting assembly are detachably connected. The threaded connection between the stepped screw and the drive shaft, and the threaded connection between the nut and the stepped screw, facilitates assembly and disassembly. No complex special tools are required during assembly, and the assembly sequence of each component is clear, meeting standardized assembly requirements, thus reducing assembly difficulty and subsequent maintenance costs. By adjusting the bearing type, the thickness of the flat washer, and the thread specification of the stepped screw, the limiting assembly can be adapted to different models and operating conditions of drive shafts, making it suitable for various electric equipment, construction machinery, and other transmission systems, with wide application scenarios and practical value. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of the overall structure of a transmission shaft limiting assembly according to this utility model.

[0013] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0014] In the diagram: 1. Drive shaft; 11. Threaded hole; 2. Drive cover; 3. Limiting component; 31. Stepped screw; 32. Nut; 33. Bearing; 34. Snap ring; 35. Flat washer. Detailed Implementation

[0015] This application provides a drive shaft limiting component, which solves the technical problem that in the prior art, drive shaft limiting structures mostly use a single fastener or a simple retaining ring for limiting, and the fit between the limiting structure and the drive shaft and drive cover is not stable enough. During long-term operation, it is easy to loosen, resulting in limiting failure and thus causing the drive shaft displacement to exceed the tolerance.

[0016] The technical solution in this application is to solve the above problems, and the overall approach is as follows: To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0017] Example 1 A drive shaft limiting assembly, such as Figure 1 and Figure 2 As shown, the assembly includes a drive shaft 1, a drive cover 2, and a limiting member 3. The drive shaft 1 is the core transmission component, and its end has a threaded hole 11 along the axial direction. The threaded hole 11 is used to achieve a detachable connection with the limiting member 3, ensuring convenient assembly and maintenance. The drive cover 2 is the mounting base for the limiting assembly, and its interior has a mounting groove adapted to the bearing 33, used to accommodate and position the relevant components of the limiting member 3, while providing stable support for the end of the drive shaft 1.

[0018] The limiting component 3 includes a stepped screw 31, a nut 32, a bearing 33, a retaining ring 34, and a flat washer 35. These components work together to achieve precise positioning of the drive shaft 1. The bearing 33 is positioned around the stepped screw 31, with its inner ring fitting against the stepped surface of the screw 31 and its outer ring embedded in the mounting groove of the transmission cover 2. Through the rotational characteristics of the bearing 33, the sliding friction of the drive shaft 1 during rotation is converted into rolling friction, reducing component wear.

[0019] One end of the stepped screw 31 is threaded into the threaded hole 11 of the drive shaft 1, thus fixing the limiting component 3 to the drive shaft 1. A flat washer 35 and a bearing 33 are sequentially fitted onto the stepped screw 31. The flat washer 35 abuts against one side of the bearing 33 to distribute the pressure generated when the nut 32 is tightened, preventing damage to the end face of the bearing 33. The nut 32 is threaded onto the stepped screw 31 and abuts against the other side of the bearing 33. Tightening the nut 32 can axially lock the bearing 33 and the flat washer 35, ensuring the stability of the fit between the components.

[0020] A retaining ring 34 is also installed on the stepped screw 31. The retaining ring 34 is a hole retaining ring, which is embedded in the retaining groove of the inner wall of the transmission cover 2 and abuts against the outer side of the bearing 33. It is used to limit the bearing 33 for a second time, prevent the bearing 33 from moving in the axial direction, and further improve the reliability of the limit.

[0021] The assembly process in this embodiment is as follows: Before assembly, the drive shaft 1, drive cover 2, stepped screw 31, nut 32, bearing 33, snap ring 34 and flat washer 35 are cleaned and washed to remove burrs, oil stains, dust and other impurities, and the dimensional accuracy of each component is checked. The flat washer 35 is fitted onto the stepped screw 31, and then the bearing 33 is fitted onto the corresponding step of the stepped screw 31, so that the flat washer 35 abuts against one side of the bearing 33. Screw the threaded end of the stepped screw 31 into the threaded hole 11 at the end of the drive shaft 1 to ensure a tight connection; The end of the drive shaft 1, which is equipped with stepped screw 31, flat washer 35 and bearing 33, is inserted into the mounting groove of the drive cover 2, so that the outer ring of the bearing 33 fits against the inner wall of the mounting groove of the drive cover 2. Tighten the nut 32 on the stepped screw 31 so that the nut 32 abuts against the other side of the bearing 33, thereby axially locking all components; Insert the snap ring 34 into the slot of the transmission cover 2, so that the snap ring 34 abuts against the outside of the bearing 33, thus completing the secondary positioning; In accordance with the assembly technical requirements, check the assembly status of each component to ensure that there are no bumps, scratches, or damage, and that the fasteners are tightened evenly and without any looseness.

[0022] Example 2 The difference between this embodiment and Embodiment 1 is that, based on the load requirements of the transmission shaft 1, different types of bearings 33 are selected, and the thickness of the flat washer 35 is adjusted to adapt to different axial force bearing requirements. The remaining structure and assembly steps are the same as in Embodiment 1. Through this adaptation and adjustment, the limiting component can be applied to transmission systems with different power and working conditions, effectively expanding the applicability of the measuring tool.

[0023] Example 3 The difference between this embodiment and Embodiment 1 is that the thread specification of the stepped screw 31 is adapted and adjusted according to the size of the threaded hole 11 of the drive shaft 1, and the model of the snap ring 34 is precisely matched with the size of the slot of the drive cover 2. The rest of the structure and operation process are the same as in Embodiment 1. This setting can ensure the fitting accuracy of each component of the limiting member 3 with the drive shaft 1 and the drive cover 2, and further improve the overall stability of the limiting assembly.

[0024] Beneficial effects 1. Through the coordinated operation of multiple components in the limiting component 3, the transmission shaft 1 is double-limited. The nut 32 axially locks the bearing 33, and the snap ring 34 provides secondary limiting of the bearing 33, effectively preventing axial movement of the bearing 33 and the transmission shaft 1, thus solving the problem of limiting failure in the prior art. At the same time, the bearing 33 is embedded in the transmission cover 2 and, together with the stepped screw 31, is threadedly connected to the transmission shaft 1, ensuring the stability of the connection between the limiting component and the transmission shaft 1 and the transmission cover 2, and improving the operational stability of the transmission system. The bearing 33 converts the sliding friction of the transmission shaft 1 during rotation into rolling friction, significantly reducing frictional losses between components. The flat washer 35 can disperse the pressure when the nut 32 is tightened, preventing damage to the end face of the bearing 33. The secondary limiting of the snap ring 34 further reduces the axial force on the bearing 33. The coordinated action of all components effectively extends the service life of the limiting component and the transmission shaft 1.

[0025] 2. All components of the limiting component 3 are detachably connected. The threaded connection between the stepped screw 31 and the drive shaft 1, and the threaded connection between the nut 32 and the stepped screw 31, facilitate assembly and disassembly. No complex special tools are required during assembly, and the assembly sequence of each component is clear, meeting standardized assembly requirements, thus reducing assembly difficulty and subsequent maintenance costs. By adjusting the type of bearing 33, the thickness of the flat washer 35, and the thread specification of the stepped screw 31, the limiting component can be adapted to different types and operating conditions of the drive shaft 1, making it suitable for various electric equipment, engineering machinery, and other transmission systems, with wide application scenarios and practical value.

[0026] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0027] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A drive shaft limiting assembly, comprising a drive shaft (1) and a drive cover (2), characterized in that, The end of the drive shaft (1) is mounted on the drive cover (2) via a limiting member (3); the limiting member (3) includes a stepped screw (31), a nut (32), and a bearing (33); the bearing (33) is arranged around the stepped screw (31); the nut (32) is threadedly connected to the stepped screw (31) and abuts against the bearing (33); the end of the drive shaft (1) is provided with a threaded hole (11); the stepped screw (31) is threadedly connected to the threaded hole (11); the outer ring of the bearing (33) is connected to the drive cover (2).

2. The drive shaft limiting assembly as described in claim 1, characterized in that, A retaining ring (34) is installed on the stepped screw (31); the retaining ring (34) is embedded in the transmission cover (2) and is used to limit the bearing (33).

3. The drive shaft limiting assembly as described in claim 2, characterized in that, A flat washer (35) is installed on the stepped screw (31); the flat washer (35) abuts against the bearing (33).

4. The drive shaft limiting assembly as described in claim 1, characterized in that, The bearing (33) is embedded in the transmission cover (2).

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