Novel transmission shaft
Through the combined design of the eight-side central shaft and half-tooth worm gear, the problem of uneven stress on the traditional transmission shaft is solved, stable connection and lightweight are achieved, cost is reduced and transmission efficiency is improved.
Patent Information
- Application Number
- CN202422441361.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-10
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2034-10-10
AI Technical Summary
In traditional transmission shaft design, uneven stress leads to deformation, poor transmission stability, and high cost.
The eight-sided central shaft structure is adopted, combined with the half-toothed worm gear and the misaligned connection hole, fixed by welding, and evenly distributes pressure and stress when transmitting torque, increase connection stability, and sets thickened walls at the connection hole to reduce weight.
The stability and reliability of the transmission shaft are achieved, while reducing material use and manufacturing costs and improving transmission efficiency.
Smart Images
Figure CN223203522U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of mechanical transmission, and in particular relates to a novel transmission shaft structure. Background Art
[0002] In mechanical transmission systems, the drive shaft is a key component responsible for transmitting rotational motion from the power source to the load. Traditional drive shaft designs typically utilize a cylindrical shaft structure, using a key and keyway connection to transmit torque to the load. This results in the primary force being concentrated on one side of the key. This uneven force over time can easily cause deformation at the connection, reducing transmission stability. Utility Model Content
[0003] Based on the deficiencies of the existing transmission shafts described in the background art, the present application provides a transmission shaft with a new structure, which has the characteristics of stable transmission, firm connection and light weight.
[0004] The worm gear is fixedly connected to the middle part of the octagonal center shaft, and is fixed specifically by welding. The worm gear can limit the rotation angle of the transmission shaft, which is suitable for the angle adjustment requirements within a specific range. At the same time, the worm gear can reduce the overall weight, reduce the use of raw materials, and reduce the manufacturing cost. An axial opening groove is respectively provided on one opposite surface of the octagonal center shaft, and the opening groove is a gap-avoiding notch for installation. The end of the octagonal center shaft is respectively provided with a connecting hole on the other side surfaces, and the two corresponding connecting holes on the adjacent side surfaces are staggered. The connecting hole is specifically a threaded hole, and a through hole is provided on the sleeve of the connecting shaft at the corresponding position. When the connecting shaft is sleeved on the octagonal center shaft of the transmission shaft through its sleeve, a fastening bolt can be passed through the through hole of the sleeve and screwed into the connecting hole of the octagonal center shaft. The matching installation method of the connecting shaft and the transmission shaft is specifically shown in FIG. Figure 4 Because the Bafang center shaft has multiple mating side surfaces, it can distribute pressure and stress more evenly when transmitting torque to the connecting shaft, making the transmission stable. The multiple mating side surfaces of the Bafang center shaft can also provide more connecting holes. Such multiple staggered connecting holes can make the connection between the Bafang center shaft and the connecting shaft more secure.
[0005] Furthermore, the Bafang center shaft is hollow, and the hollow inner wall of the Bafang center shaft protrudes around the connecting hole to form a thickened wall. The Bafang center shaft with such a structure can reduce the weight while ensuring the strength at the connecting hole, making it light and saving manufacturing materials. The lightweight transmission shaft can also improve transmission efficiency.
[0006] Preferably, the tooth block of the half-tooth worm gear is a helical tooth, and the matching method between the half-tooth worm gear and the worm is as shown in FIG. Figure 5The combination of the transmission shaft and the worm can be used for the transmission structure of the rotary reducer, and the transmitted torque is output through the Bafang center shaft of the transmission shaft.
[0007] Through the above technical solution, the utility model has at least the following beneficial effects:
[0008] The new transmission shaft described in the present application uses a half-tooth worm gear to drive the Bafang center shaft to rotate with initial power. Since the Bafang center shaft has multiple mating side surfaces, it can more evenly distribute pressure and stress when transmitting torque to the connecting shaft, making the transmission stable. The multiple mating side surfaces of the Bafang center shaft can also provide more connecting holes. The multiple staggered connecting holes can make the installation and connection of the connecting shaft on the Bafang center shaft more secure. The hollow Bafang center shaft with thickened walls can reduce the weight while ensuring the strength at the connecting holes, making it light and saving manufacturing materials. The lightweight transmission shaft can also improve transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 This is a schematic diagram of the overall structure of a new type of transmission shaft described in an embodiment of the present application;
[0010] Figure 2 A top view of a novel transmission shaft described in an embodiment of the present application;
[0011] Figure 3 This is an end view of a novel transmission shaft described in an embodiment of the present application;
[0012] Figure 4 This is a schematic diagram of the installation and connection of the new transmission shaft and connecting shaft described in the embodiment of this application;
[0013] Figure 5 This is a schematic diagram of the cooperation between the new transmission shaft and the worm described in the embodiment of this application. DETAILED DESCRIPTION
[0014] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.
[0015] In the description of this application, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, the terms describing the positional relationship are only used for illustrative purposes and cannot be understood as limiting this patent; if there are terms such as "first", "second", etc., they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the said features. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.
[0016] In the description of the utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.
[0017] refer to Figures 1 to 3 A novel transmission shaft comprises an octagonal center shaft 1 and a half-tooth worm gear 2. The octagonal center shaft 1 is an octagonal prism. The middle part of the octagonal center shaft 1 is fixedly connected to the half-tooth worm gear 2, specifically by welding. The half-tooth worm gear 2 can limit the rotation angle of the transmission shaft and is suitable for angle adjustment requirements within a specific range. At the same time, the half-tooth worm gear 2 can reduce the overall weight, reduce the use of raw materials, and reduce manufacturing costs; an axial opening groove 3 is respectively opened on one opposite surface of the octagonal center shaft 1, and the opening groove 3 is an air-avoiding notch for installation. The end of the octagonal center shaft 1 is respectively opened on the other side surfaces with a connecting hole 4, and the two corresponding connecting holes 4 on the adjacent side surfaces are staggered. The connecting hole 4 is specifically a threaded hole, and a through hole is opened on the sleeve of the connecting shaft 6 at the corresponding position. When the connecting shaft 6 is sleeved on the octagonal center shaft 1 of the transmission shaft through its sleeve, the fastening bolt 7 can be passed through the through hole of the sleeve and screwed into the connecting hole 4 of the octagonal center shaft 1. The matching installation method of the connecting shaft 6 and the transmission shaft is specifically shown in FIG. Figure 4 ; Since the Bafang center shaft 1 has multiple mating side surfaces, it can distribute pressure and stress more evenly when transmitting torque to the connecting shaft 6, making the transmission stable. The multiple mating side surfaces of the Bafang center shaft 1 can also provide more connecting holes 4. Such multiple staggered connecting holes 4 can make the connection between the Bafang center shaft 1 and the connecting shaft 6 more secure.
[0018] The Bafang center shaft 1 is hollow, and the hollow inner wall of the Bafang center shaft 1 protrudes around the connecting hole 4 to form a thickened wall 5. The Bafang center shaft 1 with such a structure can reduce the weight while ensuring the strength at the connecting hole 4, making it light and saving manufacturing materials. The lightweight transmission shaft can also improve transmission efficiency.
[0019] The tooth block of the half-tooth worm wheel 2 is a helical tooth, and its matching mode with the worm 8 is shown in FIG. Figure 5 The combination of the transmission shaft and the worm 8 can be used for the transmission structure of a rotary reducer, and the transmitted torque is output through the Bafang center shaft 1 of the transmission shaft.
[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Based on the present invention and the above description, relevant personnel can make various changes and modifications without departing from the technical idea of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A new type of transmission shaft, characterized by: The invention comprises an octagonal central shaft (1) and a half-tooth worm gear (2), wherein the octagonal central shaft (1) is an octagonal prism, the middle portion of the octagonal central shaft (1) is fixedly connected to the half-tooth worm gear (2), an axial opening groove (3) is respectively opened on one opposite surface of the octagonal central shaft (1), and the end portion of the octagonal central shaft (1) is respectively opened on the other side surfaces with a connection hole (4), and two corresponding connection holes (4) on adjacent side surfaces are staggered.
2. A novel transmission shaft according to claim 1, characterized in that: The octagonal central axis (1) is hollow, and the hollow inner wall of the octagonal central axis (1) protrudes around the connecting hole (4) to form a thickened wall (5).
3. A novel transmission shaft according to claim 1 or 2, characterized in that: The tooth blocks of the half-tooth worm wheel (2) are helical teeth.