Spline shaft

Abstract

The utility model relates to the technical field of spline shafts, in particular to a spline shaft, which comprises a main shaft and gear shafts arranged at two ends of the main shaft, annular grooves are arranged on the outer wall of the main shaft close to the two ends, a plurality of spline grooves are arranged in the middle of the outer wall of the main shaft, limit sleeves are further arranged at two ends of the outer wall of the main shaft, and slots are arranged at two ends of the main shaft. An insertion block is arranged at the position, corresponding to the insertion groove, of the gear shaft, a plurality of clamping teeth are arranged on the outer wall of the gear shaft, a plurality of counter bores are formed in the outer end of the gear shaft, bolt rods are arranged in the counter bores, and screw holes are formed in the positions, corresponding to the counter bores, of the insertion groove; according to the spline shaft, the spline groove is formed, the main shaft and the external spline sleeve are correspondingly and stably inserted and matched, the clamping stability is improved, the gear shaft is inserted and matched with the inserting groove through the inserting block, the damaged gear shaft is convenient to replace, and resource waste caused by overall replacement is reduced; and the combination stability is improved.

Description

Technical Field

[0001] This utility model relates to the field of spline shaft technology, specifically a spline shaft. Background Technology

[0002] Splined shafts are a type of mechanical transmission, similar to flat keys, semi-circular keys, and wedge keys, all of which transmit mechanical torque. They have longitudinal keyways on the outer surface of the shaft, and the rotating parts fitted on the shaft also have corresponding keyways, which can keep them rotating synchronously with the shaft. While rotating, some can also slide longitudinally on the shaft, such as gearbox shift gears.

[0003] The utility model with announcement number CN220365877U discloses an internal spline shaft, including a connecting shaft and a first positioning component. The connecting shaft has a through hole along the axial direction. The through hole includes a first spline groove and an adjustment groove. The first spline groove is located at one end of the through hole. A sliding groove is provided on the outer periphery of the connecting shaft. The sliding groove is elongated. The first positioning component includes a positioning screw and a positioning abutment. The positioning screw is sleeved on the outer periphery of the connecting shaft and threaded with the connecting shaft to realize the adjustment of the positioning screw along the axial direction of the connecting shaft.

[0004] The above technical solution, for different external spline structures, can be achieved by first adjusting the positioning screw in the left-right direction, and then sliding the positioning abutment left and right to make the positioning part slide into the positioning slot, thereby limiting the circumferential rotation of the positioning screw and ensuring the effective fit between the external spline structure and the internal spline shaft according to the actual fit requirements of the external spline structure; however, after long-term use of the spline shaft, the gear on the outer ring wears and is damaged, and the repair of broken teeth is time-consuming and laborious, resulting in high overall replacement costs, and it is not convenient to replace the fit of the end with the external gear. Utility Model Content

[0005] The purpose of this invention is to provide a spline shaft to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A splined shaft includes a main shaft and gear shafts at both ends of the main shaft. The outer wall of the main shaft has annular grooves near both ends. The outer wall of the main shaft has several spline grooves in the middle. Limiting sleeves are also provided at both ends of the outer wall of the main shaft. Slots are provided at both ends of the main shaft. Insert blocks are provided on the gear shafts corresponding to the slots. Several retaining teeth are provided on the outer wall of the gear shafts. Several countersunk holes are provided on the outer ends of the gear shafts. Bolt rods are provided in each of the countersunk holes. Screw holes are provided in the slots corresponding to the countersunk holes.

[0008] Preferably, the spline grooves are distributed in an annular shape with equal spacing, and the limiting sleeve is welded and fixed to the main shaft.

[0009] In this invention, the spline groove increases the contact area of ​​the outer surface of the spindle, thereby increasing the friction and facilitating the engagement between the spindle and the external spline sleeve, making it convenient and stable for insertion and installation.

[0010] Preferably, symmetrical locating grooves are formed on the outer wall of the locating sleeve, and the top of the locating grooves communicates with the external space.

[0011] In this invention, the limiting sleeve is fitted with a limiting groove, which helps to make the outer boundary locking block slide and fit together, and further limits the position of the main shaft locking.

[0012] Preferably, the gear shaft and the insert block are integral structures, the insert block and the gear shaft are integrally formed structures, the locking teeth are distributed in a ring with equal spacing, and the locking teeth and the gear shaft are integrally formed structures.

[0013] In this invention, the width of the outer wall of the insert block is adapted to the width of the inner wall of the slot. The insert block and the slot are inserted into each other to achieve a tight fit between the gear shaft and the end of the main shaft. Damage to the gear shaft can be easily disassembled and replaced at the end, reducing the waste of resources caused by overall replacement.

[0014] Preferably, the top of the outer wall of the gear shaft is provided with symmetrical slots, and the slots are arc-shaped.

[0015] In this invention, the slot provides a leverage point to help prevent the gear shaft from being stuck for a long time and difficult to remove, and facilitates the insertion of external wrenches for clamping and removal.

[0016] Preferably, the countersunk holes are arranged in a matrix, the bottom of the bolt rod passes through the countersunk hole and is threadedly connected to the screw hole, and the length of the end of the bolt rod is less than the depth of the inner wall of the countersunk hole.

[0017] In this invention, the top of the bolt rod is embedded in the countersunk hole, which increases the overall aesthetics of the gear shaft and main shaft after assembly. The end of the bolt rod is threaded into the screw hole, which ensures the stability of the gear shaft and main shaft installation.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This utility model increases the stability of the connection between the main shaft and the external spline sleeve by setting a spline groove, thereby increasing the stability of the snap-fit. The gear shaft is connected to the slot through the plug, which facilitates the replacement of the damaged gear shaft and reduces the waste of resources caused by overall replacement. The four bolt rods pass through the countersunk holes on the gear shaft and are threaded to the screw holes, which increases the stability of the assembly.

[0020] 2. This utility model uses a limiting sleeve on the main shaft with a corresponding limiting groove to facilitate engagement with an external limiting block, increasing the stability of the main shaft installation. The symmetrically fitted grooves on the gear shaft provide a point of force, facilitating the insertion and engagement of external wrenches and tools, and making it convenient to remove and replace the gear shaft after removing the bolt rod. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is an exploded view of the main shaft and gear shaft of this utility model;

[0023] Figure 3 This is a schematic diagram of the main shaft structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the gear shaft and bolt rod assembly structure of this utility model;

[0025] Figure 5 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0026] The meanings of the labels in the diagram are as follows:

[0027] 1. Spindle; 10. Annular groove; 100. Spline groove; 11. Limit sleeve; 110. Limit groove; 12. Slot; 120. Screw hole;

[0028] 2. Gear shaft; 20. Insert block; 21. Slot; 22. Gear teeth; 23. Countersunk hole;

[0029] 3. Bolt rod. Detailed Implementation

[0030] 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.

[0031] Please see Figures 1-5 This embodiment provides a technical solution:

[0032] A splined shaft includes a main shaft 1 and gear shafts 2 at both ends of the main shaft 1. Annular grooves 10 are formed on the outer wall of the main shaft 1 near both ends. A plurality of spline grooves 100 are formed in the middle of the outer wall of the main shaft 1. Limiting sleeves 11 are also provided at both ends of the outer wall of the main shaft 1. The spline grooves 100 are distributed in an annular pattern at equal intervals. The limiting sleeves 11 are welded and fixed to the main shaft 1.

[0033] In this invention, the spline groove 100 increases the contact area of ​​the outer surface of the spindle 1, thereby increasing the friction and facilitating the engagement of the spindle 1 with the external spline sleeve, making it convenient and stable for insertion and installation.

[0034] Furthermore, symmetrical limit grooves 110 are formed on the outer wall of the limit sleeve 11, and the top of the limit groove 110 is connected to the external space.

[0035] In this utility model, the limiting sleeve 11 is fitted with a limiting groove 110, which helps to make the outer boundary locking block slide and fit, and further limits the locking position of the main shaft 1.

[0036] It should be noted that slots 12 are provided at both ends of the main shaft 1, and insert blocks 20 are provided on the gear shaft 2 at the corresponding positions of the slots 12. Several locking teeth 22 are provided on the outer wall of the gear shaft 2. The gear shaft 2 and the insert blocks 20 are integral structures. The insert blocks 20 and the gear shaft 2 are integrally formed structures. The locking teeth 22 are distributed in a ring with equal spacing, and the locking teeth 22 and the gear shaft 2 are integrally formed structures.

[0037] In this utility model, the width of the outer wall of the insert 20 is adapted to the width of the inner wall of the slot 12. The insert 20 and the slot 12 are inserted and engaged to achieve a tight engagement between the gear shaft 2 and the end of the main shaft 1. Damage to the gear shaft 2 can be easily disassembled and replaced at the end, reducing the waste of resources caused by overall replacement.

[0038] Furthermore, the top of the outer wall of the gear shaft 2 is symmetrically provided with slots 21, which are arc-shaped.

[0039] In this invention, the slot 21 helps to provide a leverage point for the gear shaft 2 when it is stuck for a long time and difficult to remove, and facilitates the insertion of external wrenches for clamping and removal.

[0040] Specifically, several countersunk holes 23 are provided on the outer end of the gear shaft 2, and bolt rods 3 are provided in each countersunk hole 23. Screw holes 120 are provided in the slot 12 at the corresponding positions of the countersunk holes 23.

[0041] It is worth noting that the countersunk holes 23 are arranged in a matrix, the bottom of the bolt rod 3 passes through the countersunk holes 23 and is threaded into the screw hole 120, and the length of the end of the bolt rod 3 is less than the depth of the inner wall of the countersunk holes 23.

[0042] In this utility model, the top end of the bolt rod 3 is embedded in the countersunk hole 23, which increases the overall aesthetics of the gear shaft 2 and the main shaft 1 after assembly. The end of the bolt rod 3 is threaded into the screw hole 120 to achieve the stability of the installation of the gear shaft 2 and the main shaft 1.

[0043] In this embodiment, when the spline shaft is used, the limiting sleeve 11 with the limiting groove 110 is first combined and fixed with the main shaft 1 with the spline groove 100. Then, the cleats 22 are evenly distributed on the gear shaft 2. The gear shaft 2 is inserted into the slot 12 through the insert block 20 to realize the insertion and engagement of the gear shaft 2 and the main shaft 1. The bolt rod 3 passes through the countersunk hole 23 and is threadedly connected to the screw hole 120, which ensures the stability of the installation of the main shaft 1 and the gear shaft 2.

[0044] With the cooperation of the spline groove 100, it is helpful for the main shaft and the corresponding spline combination of the external spline sleeve to be installed and matched. With the cooperation of the limiting groove 110, it is helpful for the corresponding external slider to be inserted and matched with the limiting groove 110. After long-term use, the retaining tooth 22 wears or breaks under the action of friction, affecting the continuous meshing and rotation. The bolt rod 3 is manually removed from the countersunk hole 23, and with the cooperation of the retaining groove 21, the external wrench is inserted into the retaining groove 21 to separate the gear shaft 2 from the main shaft 1. This makes it convenient to replace the gear shaft 2 separately, reducing the waste of resources caused by replacing the whole shaft, and thus reducing cost consumption.

Claims

1. A spline shaft comprising a main shaft (1) and gear shafts (2) provided at both ends of the main shaft (1), characterized in that: The outer wall of the main shaft (1) is provided with an annular groove (10) near both ends, a plurality of spline grooves (100) are arranged in the middle of the outer wall of the main shaft (1), a limiting sleeve (11) is further arranged at both ends of the outer wall of the main shaft (1), an insertion slot (12) is arranged on both ends of the main shaft (1), an insertion block (20) is arranged on the gear shaft (2) corresponding to the insertion slot (12), a plurality of clamping teeth (22) are arranged on the outer wall of the gear shaft (2), a plurality of counterbores (23) are arranged on the outer end of the gear shaft (2), a bolt rod (3) is arranged in each of the counterbores (23), and a screw hole (120) is arranged in the insertion slot (12) corresponding to the counterbores (23).

2. The spline shaft according to claim 1, characterized by: The spline grooves (100) are annularly and equidistantly distributed, and the limiting sleeve (11) is welded and fixed with the main shaft (1).

3. The spline shaft according to claim 2, characterized by: The limiting sleeve (11) is symmetrically provided with a limiting groove (110) on the outer wall, and the top of the limiting groove (110) is in communication with the outside space.

4. The spline shaft according to claim 1, characterized by: The gear shaft (2) and the insertion block (20) are an integral structure, the insertion block (20) and the gear shaft (2) are an integral structure, the clamping teeth (22) are annularly and equidistantly distributed, and the clamping teeth (22) and the gear shaft (2) are an integral structure.

5. The spline shaft according to claim 1, characterized by: The gear shaft (2) is symmetrically provided with a clamping groove (21) on the top of the outer wall, and the clamping groove (21) is in a circular arc shape.

6. The spline shaft according to claim 1, characterized by: The counterbores (23) are arranged in a matrix, the bottom of the bolt rod (3) passes through the counterbores (23) and is threadedly connected with the screw holes (120), and the length of the end portion of the bolt rod (3) is less than the depth of the inner wall of the counterbores (23).

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