Shaft head structure with adjustable shaft diameter

Abstract

The utility model discloses a kind of shaft head structures of adjustable shaft diameter, it is related to shaft head structure technical field, including shaft head, rectangular cavity is set in shaft head, the cavity of rectangular cavity is inserted with shaft diameter adjusting plate, the plate body of shaft diameter adjusting plate is set with multiple shaft holes along vertical direction, the four corners of shaft hole are all set with the positioning hole set in the plate body of shaft diameter adjusting plate, and the side wall of shaft head is provided with positioning mechanism.The utility model is set by positioning mechanism, when needing to adapt to different diameter specifications of shaft rod, when needing to adjust the shaft diameter of this shaft head, by simultaneously pulling two vertical rods forward, after making positioning rod separate from positioning hole, shaft diameter adjusting plate can be lifted along rectangular cavity, so that the shaft hole of the size of the adaptation on the surface of shaft diameter adjusting plate moves between two shaft sleeves, to realize the adjustment of shaft diameter.The shaft head structure can adjust shaft diameter according to different diameter of shaft rod, greatly improve the practicality of the shaft head structure.

Description

Technical Field

[0001] This utility model relates to the field of shaft head structure technology, specifically a shaft head structure with adjustable shaft diameter. Background Technology

[0002] Axle heads are critical components in mechanical equipment, widely used in transmission and support systems of forklifts, concrete mixers, and automobiles. Their core functions include connecting rotating parts, supporting operating loads, and ensuring equipment stability. In automotive construction, axle heads directly affect driving safety and vehicle performance; in industrial equipment, sealing technology reduces the risk of axle head wear. With the application of new technologies such as polymer composite materials, the service life and corrosion resistance of axle heads have been significantly improved.

[0003] Chinese Patent Publication No. CN221085262U discloses a novel shaft head structure for a glass-lined stirrer. The structure includes a connecting part, with a shaft head seat fixedly connected to the bottom of the connecting part. The bottom of the shaft head seat has a snap-fit ​​groove, inside which a shaft rod is snapped. A locking sleeve is threaded onto the outer side of the shaft head seat, and two locking mechanisms are installed on the shaft head seat. This invention uses the connecting part as the connection structure between the shaft head seat and the stirrer. When connecting the shaft rod, the connecting end of the shaft rod is first aligned with the snap-fit ​​groove and snapped in. Then, the locking sleeve is rotated and descends along the shaft head seat, pressing the two locking mechanisms to lock and position the shaft rod, thus achieving a quick and flexible connection. Furthermore, two limiting components limit the locking sleeve, preventing loosening during operation and making the structure more stable. This results in a device with convenient and efficient loading and unloading operations, as well as a stable connection structure.

[0004] However, the shaft head structure disclosed in the above patent still has certain shortcomings in practical applications. The shaft head structure in the above patent cannot adjust the shaft diameter and cannot be adapted to shafts with different diameters, making it only applicable to shafts of one diameter specification, and thus its practicality is low. Utility Model Content

[0005] The purpose of this utility model is to provide a shaft head structure with adjustable shaft diameter, so as to solve the problem mentioned in the background art that the existing shaft head structure cannot adjust the shaft diameter, cannot adapt to shafts with different shaft diameters, and can only be used for shafts of one diameter specification, resulting in low practicality.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a shaft head structure with adjustable shaft diameter, including a shaft head, a rectangular cavity is provided in the shaft head, a shaft diameter adjusting plate is inserted into the cavity of the rectangular cavity, the shaft diameter adjusting plate has multiple shaft holes opened in the vertical direction, and the diameter of the multiple shaft holes decreases from the upper right to the lower right, positioning holes are provided at the four corners of the shaft holes and the shaft diameter adjusting plate is provided with a positioning mechanism on one side wall of the shaft head.

[0007] Preferably, the positioning mechanism includes a positioning frame, a positioning rod, and a vertical rod. Two positioning frames are provided, and the two positioning frames are respectively fixedly installed on the left and right front walls of the shaft head. The positioning rod is located in the cavity between the positioning frame and the shaft head. Two positioning rods are symmetrically arranged in the vertical direction. The front end of the two positioning rods movably penetrates the front wall of the positioning frame, and the rear end of the two positioning rods movably penetrates the wall of the shaft head and passes through the cavity of the positioning hole. The vertical rod is located on the front side of the positioning frame, and the two ends of the vertical rod are respectively fixedly connected to the front end of the two positioning rods on the vertical side.

[0008] Preferably, the positioning mechanism further includes a reset plate and a reset spring. The reset plate and the reset spring are both disposed in the clamping cavity between the positioning frame and the shaft head. The upper and lower side plates of the reset plate are respectively fixedly sleeved on the rod surfaces of the two positioning rods on the vertical side. The reset spring is sleeved on the rod surface of the positioning rod and is located on the front side of the reset plate.

[0009] Preferably, the rear end of the positioning rod has a thread on its surface, and a locking nut is screwed onto the thread.

[0010] Preferably, bushings are fixed to both the front and rear side walls of the shaft head.

[0011] Preferably, the four corners of the shaft head are each fixed with a fixing block, and the surface of the fixing block is provided with a fixing hole.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention, through the setting of a positioning mechanism, allows for the adjustment of the shaft diameter when adapting to shafts of different diameters. First, the locking nut is unscrewed from the threaded part of the positioning rod. Then, by simultaneously pulling forward the two vertical rods, the vertical rods move the positioning rod, causing it to move out of the shaft head and simultaneously withdraw from the positioning hole on the shaft diameter adjustment plate. During this process, the reset plate compresses the reset spring. After the positioning rod is withdrawn, the shaft diameter adjustment plate can be raised and lowered along the rectangular cavity, moving the matching shaft center hole on the surface of the shaft diameter adjustment plate between the two bushings, thus achieving shaft diameter adjustment. After adjustment, the vertical rods can be released, and under the action of the reset spring, the reset plate automatically resets the positioning rod, allowing it to pass through the positioning holes at the four corners of the shaft center hole, thus positioning and fixing the shaft diameter adjustment plate. After positioning and fixing, the locking nut can be screwed back onto the positioning rod for reinforcement. This shaft head structure allows for adjustment of the shaft diameter according to shafts of different diameters, greatly enhancing the practicality of the shaft head structure. Attached Figure Description

[0014] Figure 1 This is a first-view structural schematic diagram of an adjustable shaft head structure according to the present invention.

[0015] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A;

[0016] Figure 3 This is a second-view structural schematic diagram of an adjustable shaft head structure according to the present invention.

[0017] Figure 4 This is a third-view structural diagram of an adjustable shaft head structure according to the present invention.

[0018] In the diagram: 1. Shaft head; 2. Shaft sleeve; 3. Shaft diameter adjusting plate; 4. Shaft center hole; 5. Positioning hole; 6. Fixing block; 7. Fixing hole; 8. Positioning frame; 9. Positioning rod; 10. Vertical rod; 11. Reset plate; 12. Reset spring; 13. Rectangular cavity; 14. Thread; 15. Locking nut. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 This utility model provides a technical solution: a shaft head structure with adjustable shaft diameter, including a shaft head 1, a rectangular cavity 13 opened in the shaft head 1, a shaft diameter adjustment plate 3 inserted into the cavity of the rectangular cavity 13, the shaft diameter adjustment plate 3 has multiple shaft holes 4 opened in the vertical direction, and the diameter of the multiple shaft holes 4 decreases from the upper right to the lower right, the purpose of which is to provide multiple shaft holes 4 of different specifications on the shaft diameter adjustment plate 3. Positioning holes 5 are provided at the four corners of the shaft holes 4 and are opened in the body of the shaft diameter adjustment plate 3. The positioning mechanism is set on the front side wall of the shaft head 1 for adjusting the position of the shaft diameter adjustment plate 3.

[0021] The positioning mechanism includes a positioning frame 8, a positioning rod 9, and a vertical rod 10. There are two positioning frames 8, which are welded to the front walls on the left and right sides of the shaft head 1, respectively. The positioning rod 9 is located in the cavity between the positioning frame 8 and the shaft head 1. There are two positioning rods 9 symmetrically arranged in the vertical direction. The front ends of the two positioning rods 9 can move through the front wall of the positioning frame 8, and the rear ends of the two positioning rods 9 can move through the wall of the shaft head 1 and pass through the cavity of the positioning hole 5. When the positioning rod 9 passes through the positioning hole 5, the shaft diameter adjustment plate 3 cannot move. The vertical rod 10 is located on the front side of the positioning frame 8, and the upper and lower ends of the vertical rod 10 are welded to the front ends of the two positioning rods 9 on the vertical side, respectively. The positioning mechanism also includes a reset plate 11 and a reset spring 12. Both the reset plate 11 and the reset spring 12 are located within the cavity between the positioning frame 8 and the shaft head 1. The upper and lower side plates of the reset plate 11 are welded and sleeved onto the surfaces of the two positioning rods 9 on the vertical side. The reset spring 12 is sleeved onto the surface of the positioning rods 9, and is located on the front side of the reset plate 11. A thread 14 is formed on the rear end surface of the positioning rods 9, and a locking nut 15 is screwed onto the thread 14. Bushings 2 are welded to both the front and rear side walls of the shaft head 1. Fixing blocks 6 are welded to the walls at the four corners of the shaft head 1, and fixing holes 7 are formed on the surface of the fixing blocks 6 to facilitate fixing the shaft head 1.

[0022] Working principle: By setting up a positioning mechanism, when it is necessary to adjust the shaft diameter of the shaft head 1 to accommodate shafts of different diameters, the locking nut 15 can be screwed off from the thread 14 on the positioning rod 9. Then, by simultaneously pulling the two vertical rods 10 forward, the vertical rods 10 drive the positioning rod 9 to move, causing the positioning rod 9 to move out of the shaft head 1. At the same time, the positioning rod 9 is pulled out of the positioning hole 5 on the surface of the shaft diameter adjustment plate 3. During this process, the reset plate 11 will compress the reset spring 12, and the positioning is complete. After rod 9 is removed, the shaft diameter adjustment plate 3 can be raised and lowered along the rectangular cavity 13, allowing the matching shaft center hole 4 on the surface of the shaft diameter adjustment plate 3 to move between the two bushings 2, thereby adjusting the shaft diameter. After adjustment, the vertical rod 10 can be released, and under the action of the return spring 12, the return plate 11 drives the positioning rod 9 to automatically return to its original position, allowing the positioning rod 9 to pass through the positioning holes 5 at the four corners of the shaft center hole 4, thus positioning and fixing the shaft diameter adjustment plate 3. After positioning and fixing, the locking nut 15 can be screwed onto the positioning rod 9 again for reinforcement. This shaft head 1 can adjust the shaft diameter according to shafts of different diameters, greatly improving the practicality of the shaft head 1.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A shaft head structure with adjustable shaft diameter, comprising a shaft head (1), characterized in that: A rectangular cavity (13) is provided in the shaft head (1). A shaft diameter adjustment plate (3) is inserted into the cavity of the rectangular cavity (13). The shaft diameter adjustment plate (3) has multiple shaft holes (4) in the vertical direction. The diameter of the multiple shaft holes (4) decreases from the upper right to the lower left. Positioning holes (5) are provided at the four corners of the shaft holes (4) and are provided on the shaft diameter adjustment plate (3). A positioning mechanism is provided on one side wall of the shaft head (1).

2. The shaft head structure with adjustable shaft diameter according to claim 1, characterized in that: The positioning mechanism includes a positioning frame (8), a positioning rod (9), and a vertical rod (10). There are two positioning frames (8), which are fixedly installed on the left and right front walls of the shaft head (1). The positioning rod (9) is located in the cavity between the positioning frame (8) and the shaft head (1). There are two positioning rods (9) symmetrically arranged in the vertical direction. The front end of the two positioning rods (9) moves through the front wall of the positioning frame (8), and the rear end of the two positioning rods (9) moves through the wall of the shaft head (1) and passes through the cavity of the positioning hole (5). The vertical rod (10) is located on the front side of the positioning frame (8), and the two ends of the vertical rod (10) are fixedly connected to the front ends of the two positioning rods (9) on the vertical side.

3. The shaft head structure with adjustable shaft diameter according to claim 2, characterized in that: The positioning mechanism also includes a reset plate (11) and a reset spring (12). The reset plate (11) and the reset spring (12) are both located in the cavity between the positioning frame (8) and the shaft head (1). The upper and lower plates of the reset plate (11) are respectively fixedly sleeved on the surfaces of the two positioning rods (9) on the vertical side. The reset spring (12) is sleeved on the surface of the positioning rod (9) and is located on the front side of the reset plate (11).

4. The shaft head structure with adjustable shaft diameter according to claim 3, characterized in that: The rear end of the positioning rod (9) has a thread (14) on its surface, and a locking nut (15) is screwed onto the thread (14).

5. The shaft head structure with adjustable shaft diameter according to claim 1, characterized in that: Both the front and rear side walls of the shaft head (1) are fixed with bushings (2).

6. The shaft head structure with adjustable shaft diameter according to claim 1, characterized in that: The four corners of the shaft head (1) are all fixed with fixing blocks (6), and fixing holes (7) are opened on the surface of the fixing blocks (6).

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