Spline shaft stable in connection

Abstract

The utility model discloses a stable connection spline shaft which comprises a shaft body, an outer spline is connected to the outer side of one end of the shaft body, first insertion holes are formed in the left end and the right end of the shaft body, inner splines are connected to the inner walls, located at the first insertion holes, of the shaft body, and a spline plate is arranged at one end of the shaft body in a sleeving mode. According to the spline shaft, elastic force is applied to the hoop plate through the spring, so that the hoop plate can cover the top of the fastener, longitudinal movement of the fastener is blocked, the fastener is not prone to loosening, the connecting strength of the spline plate and the shaft body is improved, the spline shaft has high stability when used, and the whole assembling mode is simple, easy to operate, time-saving and labor-saving. Furthermore, the external spline is meshed with the external spline hole, and the internal spline is meshed with the internal spline groove, so that the connection between the shaft body and the spline plate is more stable, the mechanical torque capable of being transmitted is larger, the tooth breakage condition is avoided, and the use of the spline shaft is facilitated.

Description

Technical Field

[0001] This utility model specifically relates to a spline shaft with stable connection. Background Technology

[0002] A splined shaft is a mechanical transmission component that functions similarly to a flat key, semi-circular key, and wedge key, all of which transmit mechanical torque. It has longitudinal keyways on its outer surface, and the rotating parts fitted on the shaft also have corresponding keyways, which can keep them rotating synchronously with the shaft. While rotating, some of them can also slide longitudinally on the shaft, such as gearbox shift gears. It has a wide range of applications and has become a core component of modern mechanical transmission due to its efficient torque transmission, high reliability, and compact structure.

[0003] However, currently, when using spline switches, the spline keypad is usually fixed to the switch body by welding or bolting. Welding is time-consuming and laborious, and bolted connections are prone to loosening and instability during later use. Furthermore, when the connection between the spline keypad and the switch body is unstable, it will lead to a reduction in the transmitted mechanical torque, which can easily cause tooth breakage and affect the use.

[0004] Therefore, it is necessary to invent a spline shaft with stable connection to solve the above problems. Utility Model Content

[0005] (a) Purpose of the utility model

[0006] To address the technical problems existing in the background art, this utility model proposes a splined shaft with stable connection. A spring applies elastic force to the clamp plate, allowing the clamp plate to cover the top of the fastener, hindering its longitudinal movement and preventing loosening. This improves the connection strength between the splined keypad and the shaft, resulting in high stability during use. Furthermore, the assembly method is simple and easy to operate, saving time and effort. Moreover, the engagement of the external spline with the external spline hole and the internal spline with the internal spline groove further stabilizes the connection between the shaft and the splined keypad, enabling the transmission of greater mechanical torque and preventing tooth breakage, thus benefiting the use of this splined shaft.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a stable spline shaft, including a shaft body, an external spline connected to the outer side of one end of the shaft body, and first insertion holes opened at both the left and right ends of the shaft body, with internal splines connected to the inner walls of the shaft body at the first insertion holes.

[0009] A multi-point key is fitted onto one end of the switch body. A second insertion hole is provided on the side of the multi-point key adjacent to the switch body. An external spline hole that meshes with the external spline is connected to the inner wall of the multi-point key at the second insertion hole. A column is connected inside the second insertion hole. An internal spline groove that meshes with the internal spline is distributed on the outer wall of the column.

[0010] A stabilizing component is located at the connection point between the switch and the keyboard, ensuring a stable connection between the switch and the keyboard.

[0011] Preferably, the side of the keyboard furthest from the switches is connected to a mounting plate.

[0012] Preferably, the stabilizing component includes a locking hole formed inside the shaft and communicating with the first insertion hole, a locking block connected to one side of the column and capable of being inserted into the locking hole, a fastener installed on the top of the shaft and with its bottom end penetrating through the locking block, and a clamping plate sleeved on the outside of the shaft and capable of moving along the shaft axis to cover the fastener.

[0013] Preferably, the connection between the shaft and the fastener is provided with a flat section, and the top of the locking block and the top of the shaft are provided with threaded holes for the fastener to be screwed in. The fastener is set as an internal hex bolt, and the top end is set as an arc surface.

[0014] Preferably, the shaft body is provided with a limiting ring plate on one side of the hoop plate, and a spring sleeved on the outside of the shaft body is installed between the limiting ring plate and the hoop plate.

[0015] Preferably, an annular baffle is sleeved on the outer side of the hoop plate, and the hoop plate and the limiting ring plate are respectively disposed inside the left and right sides of the annular baffle.

[0016] Preferably, the annular dial plate is connected to the outer side of the hoop plate, and the inner diameter of the annular dial plate is adapted to the outer diameter of the limiting ring plate.

[0017] Compared with the prior art, the beneficial effects of the above-mentioned technical solution of this utility model are:

[0018] 1. After assembling the keypad and the switch, the ring-shaped lever is loosened. At this time, the clamp plate will spring outward under the action of the spring force, thereby sealing the flat section and completing the coverage of the fastener. At this time, the longitudinal movement of the fastener will be blocked by the clamp plate, preventing it from moving longitudinally. This makes the fastener less likely to loosen after being screwed in, resulting in a high connection strength between the assembled keypad and the switch. The spline switch has high stability during use, and the entire assembly method is simple and easy to operate, saving time and effort.

[0019] 2. This utility model uses the external spline to mesh with the external spline hole and the internal spline to mesh with the internal spline groove, so that the connection between the shaft and the spline has two rings of interlocking, with multiple stress points. The connection between the two is more stable, and the mechanical torque that can be transmitted is greater. It avoids the occurrence of tooth breakage and is beneficial to the use of the spline shaft. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

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

[0022] Figure 2 This is a schematic diagram of the connection structure between the keyboard and the switch of this utility model;

[0023] Figure 3 This is a schematic diagram of the connection structure between the annular baffle and the hoop plate of this utility model;

[0024] Figure 4 This is an exploded view of the fastener and shaft of this utility model;

[0025] Figure 5 This is a demonstration diagram showing the annular dial of this utility model after it has been turned.

[0026] Figure 6 This is a schematic diagram of the external spline and the external spline hole engaging in this utility model;

[0027] Figure 7 This is a schematic diagram of the structure of the decorative keyboard of this utility model;

[0028] Figure 8 This is a schematic diagram of the structure of the shaft of this utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Shaft body, 11. External spline, 12. First socket, 13. Internal spline;

[0031] 2. Spline keypad, 21. Second jack, 22. External spline hole, 23. Pillar, 24. Internal spline groove;

[0032] 3. Stabilizing components, 31. Clip holes, 32. Clip blocks, 33. Fasteners, 34. Hoop plates;

[0033] 4. Mounting plate, 5. Flat section, 6. Threaded hole, 7. Limiting ring plate, 8. Spring, 9. Annular dial plate. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0035] This utility model provides, for example Figure 1-8 The splined shaft shown includes a shaft body 1, an external spline 11 connected to the outer side of one end of the shaft body 1, and first insertion holes 12 opened at both the left and right ends of the shaft body 1. An internal spline 13 is connected to the inner wall of the shaft body 1 at the first insertion hole 12.

[0036] The keypad 2 is sleeved on one end of the shaft 1. A second insertion hole 21 is provided on the side of the keypad 2 adjacent to the shaft 1. An external spline hole 22 that meshes with the external spline 11 is connected to the inner wall of the keypad 2 at the second insertion hole 21. A column 23 is connected inside the second insertion hole 21. An internal spline groove 24 that meshes with the internal spline 13 is distributed on the outer wall of the column 23.

[0037] A stabilizing component 3 is provided at the connection between the switch body 1 and the keyboard 2, so that the switch body 1 and the keyboard 2 can be stably connected. The stabilizing component 3 includes a locking hole 31 opened inside the switch body 1 and communicating with the first insertion hole 12, a locking block 32 connected to one side of the column body 23 and able to be inserted into the locking hole 31, a fastener 33 installed on the top of the switch body 1 and with its bottom end penetrating through the locking block 32, and a clamping plate 34 sleeved on the outside of the switch body 1 and able to move along the axial direction of the switch body 1 to cover the fastener 33.

[0038] In one embodiment, the spline key 2 is connected to a mounting plate 4 on the side away from the switch 1, which facilitates the assembly of the spline switch with external components and makes it easy to put into use.

[0039] In one embodiment, a planar section 5 is provided at the connection between the shaft 1 and the fastener 33. The top of the locking block 32 and the top of the shaft 1 are both provided with threaded holes 6 for the fastener 33 to be screwed in. The fastener 33 is set as an internal hex bolt, which makes it easy for the fastener 33 to be screwed into the threaded hole 6. The top is not protruding and the top end is set as an arc surface, so that the fastener 33 is adapted to the outer diameter of the shaft 1. When the clamp 34 is located at the planar section 5, it can make contact coverage on the fastener and restrict its longitudinal movement. The longitudinal movement refers to the fastener 33 moving up and down along the threaded hole 6 on the shaft 1.

[0040] In one embodiment, the shaft 1 is positioned on one side of the clamp plate 34 as a limiting ring plate 7. A spring 8 is installed between the limiting ring plate 7 and the clamp plate 34 and sleeved on the outside of the shaft 1. An annular lever plate 9 is sleeved on the outside of the clamp plate 34. The clamp plate 34 and the limiting ring plate 7 are respectively located inside the left and right sides of the annular lever plate 9. The annular lever plate 9 is connected to the outside of the clamp plate 34. The inner diameter of the annular lever plate 9 is adapted to the outer diameter of the limiting ring plate 7, so that the clamp plate 34 can always contact the right side of the outer spline 11 and thus be located on the outside of the planar segment 5, sealing the fastener 33. This improves the connection strength between the fastener 33 and the shaft 1 and the locking block 32, thereby improving the connection strength between the spline 2 and the shaft 1. This makes the assembled spline shaft less prone to loosening during use and has high stability.

[0041] The specific implementation method is as follows: When using this utility model, the operator inserts the shaft 1 into the inside of the spline keyboard 2. At this time, the column 23 is also inserted into the inside of the shaft 1 along with the shaft 1. When the outer spline 11 engages with the outer spline hole 22, the inner spline 13 also engages with the inner spline groove 24. This results in two interlocking points at the connection between the shaft 1 and the spline keyboard 2, with multiple stress points. The connection between the two is more stable, the meshing transmission is more stable, and the mechanical torque that can be transmitted is greater, which can effectively prevent the occurrence of tooth breakage.

[0042] Furthermore, after the switch 1 is inserted into the keypad 2, the locking block 32 will also be inserted into the locking hole 31. When the end of the column 23 contacts the side wall of the keypad 2 located in the second insertion hole 21, the locking block 32 is completely inside the locking hole 31. At this time, the threaded hole 6 at the top of the locking block 32 is aligned vertically with the threaded hole 6 on the switch 1. The operator moves the annular lever 9 to the right. The annular lever 9 moves away from the outer spline 11 along the axial direction of the switch 1, thereby driving the clamp 34 away from the outer spline 11, so that the flat section 5 is exposed. At the same time, the spring 8 becomes shorter and is in a contracted state.

[0043] Then, fastener 33 is screwed into the shaft 1. As fastener 33 is screwed in, its bottom end passes through the retaining block 32 and is fixed to the column 23. After fastener 33 is screwed in, its top is curved, meaning the top of fastener 33 matches the outer side of shaft 1. When the operator releases the annular lever 9, the spring 8 is released from its thrust and returns to its original shape, becoming longer again. This applies a spring force to the clamp 34, causing it to spring towards the outer spline 11 and remain in contact with it, thus flattening the surface. Section 5 is blocked again, limiting the fastener 33 so that it cannot move longitudinally. This makes the fastener 33 highly stable after being screwed in. The locking block 32 can be firmly fixed inside the switch 1, making the connection between the switch 1 and the spline switch 2 more stable. During use, the spline switch is not easy to loosen and has high overall stability. Moreover, assembling the spline switch 2 and the switch 1 only requires inserting and screwing in one fastener 33. This assembly method is simple to operate, saves time and effort, and is beneficial to the overall assembly of the spline switch.

[0044] This embodiment specifically addresses the problem that in the current technology, when using a splined switch, the spline keypad 2 is usually fixed to the switch body 1 by welding or bolting. Welding is time-consuming and labor-intensive, and bolted connections are prone to loosening and instability during later use. Furthermore, when the connection between the spline keypad 2 and the switch body 1 is unstable, it will lead to a decrease in the transmitted mechanical torque, which can easily cause tooth breakage and affect the use of the switch.

[0045] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A stable spline shaft, characterized in that: include: Shaft (1), an external spline (11) is connected to the outer side of one end of the shaft (1), and a first insertion hole (12) is provided at both the left and right ends of the shaft (1). An internal spline (13) is connected to the inner wall of the shaft (1) at the first insertion hole (12). A swivel keyboard (2) is fitted onto one end of the shaft (1). A second insertion hole (21) is provided on the side of the swivel keyboard (2) adjacent to the shaft (1). An external spline hole (22) that meshes with the external spline (11) is connected to the inner wall of the swivel keyboard (21). A column (23) is connected inside the second insertion hole (21). An internal spline groove (24) that meshes with the internal spline (13) is distributed on the outer wall of the column (23). A stabilizing component (3) is provided at the connection between the switch (1) and the keyboard (2) to ensure a stable connection between the switch (1) and the keyboard (2). The stabilizing component (3) includes a locking hole (31) opened inside the shaft (1) and connected to the first insertion hole (12), a locking block (32) connected to one side of the column (23) and able to be inserted into the locking hole (31), a fastener (33) installed on the top of the shaft (1) and with its bottom end penetrating through the locking block (32), and a clamping plate (34) sleeved on the outside of the shaft (1) and able to move along the axial direction of the shaft (1) to cover the fastener (33).

2. The splined shaft with stable connection according to claim 1, characterized in that: The keyboard (2) is connected to a mounting plate (4) on the side away from the switch (1).

3. The splined shaft with stable connection according to claim 1, characterized in that: A flat section (5) is provided at the connection between the shaft (1) and the fastener (33). The top of the locking block (32) and the top of the shaft (1) are provided with threaded holes (6) for the fastener (33) to be screwed in. The fastener (33) is set as an internal hex bolt and the top end is set as an arc surface.

4. The splined shaft with stable connection according to claim 1, characterized in that: The shaft (1) is positioned on one side of the hoop (34) as a limiting ring plate (7), and a spring (8) is installed between the limiting ring plate (7) and the hoop (34) on the outside of the shaft (1).

5. A splined shaft with stable connection according to claim 4, characterized in that: The hoop (34) is fitted with an annular dial plate (9) on its outer side. The hoop (34) and the limiting ring plate (7) are respectively located inside the left and right sides of the annular dial plate (9).

6. A stable spline shaft according to claim 5, characterized in that: The annular dial plate (9) is connected to the outer side of the hoop plate (34), and the inner diameter of the annular dial plate (9) is adapted to the outer diameter of the limiting ring plate (7).

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