Structure and method for preventing axial and angular movement of spline pair

Abstract

The invention discloses a structure and method for preventing axial and angular movement of a spline pair, and particularly relates to the technical field of spline pairs.The structure comprises a spline shaft and a spline sleeve, the spline sleeve is arranged on the surface of the spline shaft in a sleeving mode, a plurality of sleeve grooves are formed in the inner wall of the spline sleeve, and a plurality of shaft teeth are fixedly connected to the surface of the spline shaft; the surface of the shaft tooth is in sliding connection with the inner wall of the sleeve groove, a positioning device for limiting the spline shaft and the spline sleeve and preventing the spline shaft and the spline sleeve from axial or angular movement is arranged between the spline shaft and the spline sleeve, the positioning device comprises a positioning pin, and a first circular groove is formed in the spline shaft. The positioning device can limit and fix the spline housing and the spline shaft, so that the spline shaft cannot move in the axial direction, the situation that the spline shaft moves in the axial direction or the angular direction due to vibration in the transmission process is reduced, and the stability of the spline shaft in the transmission process is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of spline pairs, and in particular to a structure and method for preventing axial and angular movement of a spline pair. Background Art

[0002] Spline pair transmission plays a very important role in aviation power transmission systems such as the transmission between a power turbine and a main reducer, the tail drive shaft system of a helicopter, the transmission between a turbine and a compressor of a gas turbine engine, the transmission between a turbine and a reducer of a gas turbine starter and the internal transmission of the reducer, the transmission between a turbine and a reducer of an air turbine starter and the internal transmission of the reducer, etc.

[0003] In the prior art, spline connection is a commonly used connection method in mechanical equipment, and both disassembly and installation are very simple. However, during the transmission process of the spline connection, since the spline shaft and the spline sleeve are not fixed in the axial direction, the spline shaft will move axially along its own axis, which will cause unstable transmission and vibration of the mechanical equipment. Summary of the Invention

[0004] The present invention provides a structure and method for preventing axial and angular movement of a spline pair to solve the problems that due to the non - fixation of the spline shaft and the spline sleeve in the axial direction, the spline shaft will move axially along its own axis, resulting in unstable transmission and vibration of the mechanical equipment.

[0005] To achieve the above object, the present invention adopts the following technical solution: A structure for preventing axial and angular movement of a spline pair includes a spline shaft and a spline sleeve. The spline sleeve is sleeved on the surface of the spline shaft. A plurality of sleeve grooves are formed in the inner wall of the spline sleeve. A plurality of shaft teeth are fixedly connected to the surface of the spline shaft. The surface of the shaft teeth is slidably connected to the inner wall of the sleeve grooves. A positioning device for limiting the spline shaft and the spline sleeve and preventing them from axially or angularly moving is arranged between the spline shaft and the spline sleeve.

[0006] The effects achieved by the above components are as follows: Manually move the spline shaft so that the spline shaft drives the shaft teeth to move. When the spline shaft moves to the position inserted into the spline sleeve, the shaft teeth enter the sleeve grooves. At this time, the positioning device limits and fixes the spline shaft and the spline sleeve, reducing the axial or angular movement of the spline shaft and the spline sleeve.

[0007] Preferably, the positioning device includes a positioning pin. A first circular groove is formed inside the spline shaft. A third circular hole is formed on one side of the spline shaft. A third circular groove is formed on the side of the spline shaft close to the third circular hole. The inner wall of the third circular hole is connected to the inner wall of the third circular groove. The surface of the positioning pin is slidably connected to the inner wall of the third circular hole. A connecting plate is fixedly connected to one side of the positioning pin. The connecting plate is located inside the first circular groove. A first spring is fixedly connected to the side of the connecting plate close to the positioning pin. The first spring is sleeved on the surface of the positioning pin. The other end of the first spring is fixedly connected to the inner wall of the third circular groove. The positioning pin is located inside the third circular groove. A first circular hole is formed on one side of the spline sleeve. The size and shape of the surface of the positioning pin are adapted to the size and shape of the inner wall of the first circular hole.

[0008] The effects achieved by the above components are as follows: By setting the positioning device, a person can manually press the positioning pin, causing the positioning pin to move up and down inside the third circular hole, moving the positioning pin in the direction close to the inside of the first circular groove, causing the positioning pin to drive the connecting plate to move up and down. When the positioning pin moves to a position flush with the surface of the spline shaft, manually move the spline shaft, causing the spline shaft to drive the shaft teeth to move. When the spline shaft moves to a position inserted into the spline sleeve, the shaft teeth are engaged into the sleeve groove, causing the inner wall of the first circular hole to coincide with the inner wall of the third circular hole. At this time, under the reaction force of the first spring, the first spring drives the connecting plate to move in the direction close to the spline sleeve, causing the connecting plate to drive the positioning pin to move. When the positioning pin moves to a position inserted into the third circular hole and the first circular hole, the positioning pin limits and fixes the spline sleeve and the spline shaft, thereby preventing the spline shaft from moving axially, reducing the situation that the spline shaft undergoes axial or angular movement due to vibration during the transmission process, and improving the stability of the spline shaft during the transmission process.

[0009] Preferably, a plurality of reinforcing ribs are provided on the surface of the positioning pin, and the plurality of reinforcing ribs are arranged at equal intervals.

[0010] The effects achieved by the above components are as follows: By setting the reinforcing ribs, the reinforcing ribs can increase the strength of the positioning pin, reduce the situation that the positioning pin breaks or deforms during the auxiliary limiting of the spline shaft and the spline sleeve, affecting the limiting effect, and improve the use stability of the positioning pin.

[0011] Preferably, a circular shaft is fixedly connected to the inner wall of the first circular groove. A stabilizing rod is fixedly connected to the surface of the circular shaft. A fifth circular hole is formed on one side of the connecting plate. The surface of the stabilizing rod is slidably connected to the inner wall of the fifth circular hole.

[0012] The effects achieved by the above components are as follows: By providing the fifth circular hole, the circular shaft, and the stabilizing rod, the stabilizing rod can be located inside the fifth circular hole under the support of the circular shaft to limit the connecting plate, reducing the situation of the connecting plate swaying left and right during the up and down movement, and improving the stability of the connecting plate during use.

[0013] Preferably, a reinforcing block is fixedly connected to the side of the circular shaft close to the inner wall of the first circular groove, and the reinforcing block is fixedly connected to the inner wall of the first circular groove.

[0014] The effects achieved by the above components are as follows: By providing the reinforcing block, the reinforcing block can reinforce the connection between the circular shaft and the first circular groove, reducing the situation that the circular shaft separates from the inner wall of the first circular groove during use and affecting the limitation of the connecting plate, and improving the connection stability between the circular shaft and the first circular groove.

[0015] Preferably, a second circular groove is formed in the inner wall of the first circular hole, a plug pin is slidably connected to the inner wall of the second circular groove, one end of the plug pin is fixedly connected to a second spring, the other end of the second spring is fixedly connected to the inner wall of the second circular groove, a card slot is formed on one side of the positioning pin, and the size and shape of the surface of the plug pin are adapted to the size and shape of the inner wall of the card slot.

[0016] The effects achieved by the above components are as follows: By providing the plug pin and the card slot, under the reaction force of the second spring, after the positioning pin is inserted into the first circular hole, the second spring can push the plug pin into the card slot to assist in limiting the positioning pin, reducing the situation of the positioning pin shaking and sliding up and down after being inserted into the first circular hole, and improving the stability of the positioning pin inside the first circular hole.

[0017] Preferably, a first limiting rod is fixedly connected to the inner wall of the second circular groove, the first limiting rod is located inside the second spring, a first limiting groove is formed on the side of the plug pin close to the second circular groove, and the surface of the first limiting rod is slidably connected to the inner wall of the first limiting groove.

[0018] The effects achieved by the above components are as follows: By providing the first limiting rod and the first limiting groove, the first limiting rod can be located inside the second spring to limit the spring, and at the same time can be located inside the first limiting groove to assist in limiting the plug pin, reducing the situation of large deformation of the second spring during the stretching process, and reducing the situation of the plug pin shaking when moving left and right inside the second circular groove.

[0019] Preferably, a fourth circular hole is formed on one side of the spline shaft close to the third circular hole, a rectangular groove is formed on the inner wall of the first circular groove, the inner wall of the rectangular groove is connected to the inner wall of the fourth circular hole, a circular hole plate is fixedly connected to the inner wall of the rectangular groove, a push rod is slidably connected to the inner wall of the fourth circular hole, a concave plate is fixedly connected to one side of the push rod, a first clamping block is fixedly connected to one side of the concave plate, a rectangular hole is formed on one side of the connecting plate, a second clamping block is fixedly connected to the inner wall of the rectangular hole, the surfaces of the first clamping block and the second clamping block are both triangular, and a second circular hole is formed on one side of the spline sleeve, and the position of the second circular hole corresponds to that of the fourth circular hole.

[0020] The effects achieved by the above components are as follows: First, a tool is inserted into the second circular hole to squeeze the push rod inside the fourth circular hole, so that the push rod moves inside the fourth circular hole towards the connecting plate, causing the push rod to drive the concave plate to move, and the concave plate to drive the first clamping block to move. When the concave plate moves to the position where it is inserted into the rectangular hole, the first clamping block and the second clamping block are mutually squeezed. When the first clamping block moves to a position beyond the surface of the second clamping block, the second clamping block limits the first clamping block. At the same time, the circular hole plate intercepts the concave plate, thereby enabling the concave plate to cooperate with the first clamping block and the second clamping block to assist in intercepting the connecting plate, reducing the situation where the positioning pin is accidentally displaced downward due to being squeezed by the spline sleeve during use, and improving the stability of the positioning pin.

[0021] Preferably, a second limiting rod is fixedly connected to one side of the connecting plate close to the rectangular hole, a second limiting groove is formed on one side of the push rod close to the concave plate, the surface of the second limiting rod is slidably connected to the inner wall of the second limiting groove, and the first limiting rod is located inside the circular hole plate.

[0022] The effects achieved by the above components are as follows: By providing the second limiting rod and the second limiting groove, the second limiting rod can be located inside the second limiting groove to assist in limiting the concave plate and the push rod, reducing the situation where the concave plate and the push rod shake during the up and down movement, resulting in the concave plate being unable to smoothly enter the rectangular hole.

[0023] Preferably, a method for preventing axial and angular displacement of a spline pair includes the following steps: S1. First, manually move the spline shaft and insert the spline shaft into the spline sleeve, so that the shaft teeth are engaged into the sleeve grooves for connection.

[0024] S2. While the spline shaft is inserted into the spline sleeve, the spline shaft and the spline sleeve are connected and strengthened through a positioning device, and the spline shaft is limited, so that the positioning device intercepts the spline shaft that is about to undergo axial or angular displacement due to vibration during transmission.

[0025] In summary, the beneficial effects of the present invention are: By setting the positioning device, the positioning device can limit and fix the spline sleeve and the spline shaft, so that the spline shaft will not move axially, reducing the situation that the spline shaft moves axially or angularly due to vibration during the transmission process, and improving the stability of the spline shaft during the transmission process. Brief Description of the Drawings

[0026] Figure 1 is a perspective schematic diagram of the present invention; Figure 2 is a cross-sectional view of the spline sleeve of the present invention; Figure 3 is the present invention Figure 2 enlarged view of part A; Figure 4 is a perspective structural schematic diagram of the first circular groove of the present invention; Figure 5 is the present invention Figure 4 partial enlarged view; Figure 6 is a perspective structural schematic diagram of the concave plate of the present invention; Figure 7 is a perspective structural schematic diagram of the spline shaft of the present invention; Figure 8 is a perspective structural schematic diagram of a part of the present invention; Figure 9 is a perspective structural schematic diagram of the round shaft rod of the present invention; Figure 10 is a cross-sectional view of the connecting plate of the present invention.

[0027] Description of the Reference Signs: 1. Spline shaft; 2. Shaft teeth; 3. Spline sleeve; 4. Sleeve groove; 5. Positioning device; 51. First circular hole; 52. Second circular hole; 53. Second circular groove; 54. Plug pin; 55. First limiting groove; 56. Second spring; 57. First limiting rod; 58. Third circular hole; 59. Third circular groove; 510. Fourth circular hole; 511. Rectangular groove; 512. Circular hole plate; 513. Round shaft; 514. Stabilizing rod; 515. Reinforcing block; 516. First circular groove; 517. Push rod; 518. Concave plate; 519. First clamping block; 520. Second limiting groove; 521. Positioning pin; 522. Card slot; 523. Reinforcing rib; 524. Connecting plate; 525. First spring; 526. Fifth circular hole; 527. Rectangular hole; 528. Second clamping block; 529. Second limiting rod. Detailed Embodiment

[0028] Refer to Figure 1-10As shown in the figure, this embodiment discloses a structure for preventing axial and angular movement of a spline pair, which includes a spline shaft 1 and a spline sleeve 3. The spline sleeve 3 is sleeved on the surface of the spline shaft 1. A plurality of sleeve grooves 4 are provided on the inner wall of the spline sleeve 3. A plurality of shaft teeth 2 are fixedly connected to the surface of the spline shaft 1. The surface of the shaft teeth 2 is slidably connected to the inner wall of the sleeve groove 4. A positioning device 5 is provided between the spline shaft 1 and the spline sleeve 3 to limit the spline shaft 1 and the spline sleeve 3 and prevent them from axially or angularly moving. Move the spline shaft 1, so that the spline shaft 1 drives the shaft teeth 2 to move. When the spline shaft 1 moves to the position inserted into the spline sleeve 3, the shaft teeth 2 enter the sleeve groove 4. At this time, the spline shaft 1 and the spline sleeve 3 are limited and fixed by the positioning device 5, reducing the axial or angular movement of the spline shaft 1 and the spline sleeve 3.

[0029] Refer to Figure 2-10As shown, in this embodiment, the positioning device 5 includes a positioning pin 521. An inner first circular groove 516 is provided in the spline shaft 1. A third circular hole 58 is provided on one side of the spline shaft 1. A third circular groove 59 is provided on the side of the spline shaft 1 close to the third circular hole 58. The inner wall of the third circular hole 58 is connected to the inner wall of the third circular groove 59. The surface of the positioning pin 521 is slidably connected to the inner wall of the third circular hole 58. A connecting plate 524 is fixedly connected to one side of the positioning pin 521. The connecting plate 524 is located inside the first circular groove 516. A first spring 525 is fixedly connected to the side of the connecting plate 524 close to the positioning pin 521. The first spring 525 is sleeved on the surface of the positioning pin 521. The other end of the first spring 525 is fixedly connected to the inner wall of the third circular groove 59. The positioning pin 521 is located inside the third circular groove 59. A first circular hole 51 is provided on one side of the spline sleeve 3. The size and shape of the surface of the positioning pin 521 are adapted to the size and shape of the inner wall of the first circular hole 51. By providing the positioning device 5, a person can manually press the positioning pin 521, so that the positioning pin 521 moves up and down inside the third circular hole 58, and the positioning pin 521 moves towards the direction close to the inside of the first circular groove 516, so that the positioning pin 521 drives the connecting plate 524 to move up and down. When the positioning pin 521 moves to a position flush with the surface of the spline shaft 1, manually move the spline shaft 1, so that the spline shaft 1 drives the shaft teeth 2 to move. When the spline shaft 1 moves to a position inserted into the spline sleeve 3, the shaft teeth 2 are engaged into the inner sleeve groove 4, so that the inner wall of the first circular hole 51 coincides with the inner wall of the third circular hole 58. At this time, under the reaction force of the first spring 525, the first spring 525 drives the connecting plate 524 to move towards the direction close to the spline sleeve 3, so that the connecting plate 524 drives the positioning pin 521 to move. When the positioning pin 521 moves to a position inserted into the third circular hole 58 and the first circular hole 51, the positioning pin 521 limits and fixes the spline sleeve 3 and the spline shaft 1, thereby preventing the spline shaft 1 from moving axially. The situation that the spline shaft 1 moves axially or angularly due to vibration during the transmission process is reduced, and the stability of the spline shaft 1 during the transmission process is improved.

[0030] Refer to Figure 2-10As shown in the figure, this embodiment discloses that the surface of the positioning pin 521 is provided with a plurality of reinforcing ribs 523. The plurality of reinforcing ribs 523 are arranged at equal distances. By setting the reinforcing ribs 523, the reinforcing ribs 523 can increase the strength of the positioning pin 521, and reduce the situation that the positioning pin 521 breaks or deforms during the auxiliary limit of the spline shaft 1 and the spline sleeve 3, affecting the limit effect, and improving the use stability of the positioning pin 521. The inner wall of the first circular groove 516 is fixedly connected with a circular shaft 513. The surface of the circular shaft 513 is fixedly connected with a stabilizing rod 514. A fifth circular hole 526 is opened on one side of the connecting plate 524. The surface of the stabilizing rod 514 is slidably connected with the inner wall of the fifth circular hole 526. By setting the fifth circular hole 526, the circular shaft 513 and the stabilizing rod 514, the stabilizing rod 514 can be located inside the fifth circular hole 526 under the support of the circular shaft 513 to limit the connecting plate 524, reducing the situation that the connecting plate 524 shakes left and right during the up and down movement, and improving the stability of the connecting plate 524 during use.

[0031] Referring to Figure 2-10 As shown in the figure, this embodiment discloses that one side of the circular shaft 513 close to the inner wall of the first circular groove 516 is fixedly connected with a reinforcing block 515. The reinforcing block 515 is fixedly connected with the inner wall of the first circular groove 516. By setting the reinforcing block 515, the reinforcing block 515 can reinforce the connection between the circular shaft 513 and the inner wall of the first circular groove 516, reducing the situation that the circular shaft 513 separates from the inner wall of the first circular groove 516 during use, affecting the limit of the connecting plate 524, and improving the connection stability between the circular shaft 513 and the first circular groove 516. A second circular groove 53 is opened on the inner wall of the first circular hole 51. A plug pin 54 is slidably connected with the inner wall of the second circular groove 53. One end of the plug pin 54 is fixedly connected with a second spring 56. The other end of the second spring 56 is fixedly connected with the inner wall of the second circular groove 53. A card slot 522 is opened on one side of the positioning pin 521. The size and shape of the surface of the plug pin 54 are adapted to the size and shape of the inner wall of the card slot 522. By setting the plug pin 54 and the card slot 522, under the reaction force of the second spring 56, after the positioning pin 521 is inserted into the first circular hole 51, the second spring 56 can push the plug pin 54 into the card slot 522 to assist in limiting the positioning pin 521, reducing the situation that the positioning pin 521 shakes and slides up and down after being inserted into the first circular hole 51, and improving the stability of the positioning pin 521 inside the first circular hole 51.

[0032] Referring to Figure 2-10As shown in the figure, in this embodiment, a first limiting rod 57 is fixedly connected to the inner wall of the second circular groove 53. The first limiting rod 57 is located inside the second spring 56. A first limiting groove 55 is formed on the side of the plug pin 54 close to the second circular groove 53. The surface of the first limiting rod 57 is slidably connected to the inner wall of the first limiting groove 55. By providing the first limiting rod 57 and the first limiting groove 55, the first limiting rod 57 can be located inside the second spring 56 to limit the spring, and at the same time, it can be located inside the first limiting groove 55 to assist in limiting the plug pin 54, reducing the situation of large deformation of the second spring 56 during the stretching process, and reducing the situation of the plug pin 54 shaking when moving left and right inside the second circular groove 53.

[0033] Referring to Figure 2-10 As shown in the figure, in this embodiment, a fourth circular hole 510 is formed on the side of the spline shaft 1 close to the third circular hole 58. A rectangular groove 511 is formed on the inner wall of the first circular groove 516. The inner wall of the rectangular groove 511 is connected to the inner wall of the fourth circular hole 510. A circular hole plate 512 is fixedly connected to the inner wall of the rectangular groove 511. A push rod 517 is slidably connected to the inner wall of the fourth circular hole 510. A concave plate 518 is fixedly connected to one side of the push rod 517. A first clamping block 519 is fixedly connected to one side of the concave plate 518. A rectangular hole 527 is formed on one side of the connecting plate 524. A second clamping block 528 is fixedly connected to the inner wall of the rectangular hole 527. The surfaces of the first clamping block 519 and the second clamping block 528 are both triangular. A second circular hole 52 is formed on one side of the spline sleeve 3. The second circular hole 52 corresponds to the position of the fourth circular hole 510. First, a tool is inserted into the second circular hole 52 to squeeze the push rod 517 inside the fourth circular hole 510, so that the push rod 517 moves inside the fourth circular hole 510 towards the connecting plate 524, causing the push rod 517 to drive the concave plate 518 to move, and the concave plate 518 to drive the first clamping block 519 to move. When the concave plate 518 moves to the position where it is inserted into the rectangular hole 527, the first clamping block 519 and the second clamping block 528 are mutually squeezed. When the first clamping block 519 moves to the position where it crosses the surface of the second clamping block 528, the second clamping block 528 limits the first clamping block 519, and at the same time, the circular hole plate 512 intercepts the concave plate 518. Thus, the concave plate 518 cooperates with the first clamping block 519 and the second clamping block 528 to assist in intercepting the connecting plate 524, reducing the situation of the positioning pin 521 being accidentally pushed down by the spline sleeve 3 during use, and improving the stability of the positioning pin 521.

[0034] Referring to Figure 2-10As shown in the figure, in this embodiment, a second limiting rod 529 is fixedly connected to one side of the connecting plate 524 close to the rectangular hole 527. A second limiting groove 520 is formed on one side of the push rod 517 close to the concave plate 518. The surface of the second limiting rod 529 is slidably connected to the inner wall of the second limiting groove 520. The first limiting rod 57 is located inside the circular hole plate 512. By providing the second limiting rod 529 and the second limiting groove 520, the second limiting rod 529 can be located inside the second limiting groove 520 to assist in limiting the concave plate 518 and the push rod 517, reducing the situation that the concave plate 518 cannot smoothly enter the rectangular hole 527 due to shaking during the up and down movement of the concave plate 518 and the push rod 517.

[0035] The working principle is as follows: first, manually press the positioning pin 521, so that the positioning pin 521 moves up and down inside the third circular hole 58, so that the positioning pin 521 moves toward the inside of the first circular groove 516, so that the positioning pin 521 drives the connecting plate 524 to move up and down, and when the positioning pin 521 moves to a position flush with the surface of the spline shaft 1, the spline shaft 1 is manually moved, so that the spline shaft 1 drives the shaft teeth 2 to move, and when the spline shaft 1 moves to a position inserted into the inside of the spline sleeve 3, the shaft teeth 2 are stuck in the sleeve groove 4, so that the inner wall of the first circular hole 51 and the inner wall of the third circular hole 58 are aligned. The inner wall of the second circular hole 52 coincides with the inner wall of the fourth circular hole 510. At this time, under the reaction force of the first spring 525, the first spring 525 drives the connecting plate 524 to move toward the direction close to the spline sleeve 3, so that the connecting plate 524 drives the positioning pin 521 to move. When the positioning pin 521 moves to the position of inserting into the third circular hole 58 and the first circular hole 51, the inner wall of the card slot 522 coincides with the inner wall of the second circular groove 53, so that the positioning pin 521 limits and fixes the spline sleeve 3 and the spline shaft 1. At this time, under the reaction force of the second spring 56 Under the action of force, the second spring 56 pushes the latch 54 to move, so that the latch 54 moves left and right inside the second circular groove 53, so that the latch 54 moves to the position inside the insertion slot 522 to limit the positioning pin 521. At this time, a tool is inserted into the second circular hole 52 to squeeze the push rod 517 inside the fourth circular hole 510, so that the push rod 517 moves inside the fourth circular hole 510 toward the connecting plate 524, so that the push rod 517 drives the concave plate 518 to move, and the concave plate 518 drives the first block 519 to move. When the concave plate 518 When it moves to the position where it is inserted into the inner part of the rectangular hole 527, the first block 519 and the second block 528 are squeezed against each other. When the first block 519 moves to a position beyond the surface of the second block 528, the second block 528 limits the first block 519. At the same time, the circular hole plate 512 intercepts the concave plate 518, and then the concave plate 518 cooperates with the first block 519 and the second block 528 to assist in intercepting the connecting plate 524, thereby completing the limitation of the spline shaft 1 by the positioning device 5, and reducing the axial or angular movement of the spline shaft 1 during the transmission process.

[0036] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the relevant art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as they do not depart from the technical solution content of the present invention, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention. In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

Claims

1. A structure for preventing axial and angular displacement of a spline pair, Characterized in that: It includes a spline shaft (1) and a spline sleeve (3). The spline sleeve (3) is sleeved on the surface of the spline shaft (1). A plurality of sleeve grooves (4) are provided on the inner wall of the spline sleeve (3). A plurality of shaft teeth (2) are fixedly connected to the surface of the spline shaft (1). The surface of the shaft teeth (2) is slidably connected to the inner wall of the sleeve groove (4). A positioning device (5) for limiting the spline shaft (1) and the spline sleeve (3) and preventing them from axially or angularly displacing is provided between the spline shaft (1) and the spline sleeve (3).

2. The structure for preventing axial and angular displacement of a spline pair according to claim 1, Characterized in that: The positioning device (5) includes a positioning pin (521). A first circular groove (516) is provided inside the spline shaft (1). A third circular hole (58) is provided on one side of the spline shaft (1). A third circular groove (59) is provided on the side of the spline shaft (1) close to the third circular hole (58). The inner wall of the third circular hole (58) is connected to the inner wall of the third circular groove (59). The surface of the positioning pin (521) is slidably connected to the inner wall of the third circular hole (58). A connecting plate (524) is fixedly connected to one side of the positioning pin (521). The connecting plate (524) is located inside the first circular groove (516). A first spring (525) is fixedly connected to the side of the connecting plate (524) close to the positioning pin (521). The first spring (525) is sleeved on the surface of the positioning pin (521). The other end of the first spring (525) is fixedly connected to the inner wall of the third circular groove (59). The positioning pin (521) is located inside the third circular groove (59). A first circular hole (51) is provided on one side of the spline sleeve (3). The size and shape of the surface of the positioning pin (521) are adapted to the size and shape of the inner wall of the first circular hole (51).

3. The structure for preventing axial and angular displacement of a spline pair according to claim 2, Characterized in that: A plurality of reinforcing ribs (523) are provided on the surface of the positioning pin (521). The plurality of reinforcing ribs (523) are arranged at equal distances.

4. The structure for preventing axial and angular displacement of a spline pair according to claim 2, Characterized in that: A circular shaft (513) is fixedly connected to the inner wall of the first circular groove (516). A stabilizing rod (514) is fixedly connected to the surface of the circular shaft (513). A fifth circular hole (526) is provided on one side of the connecting plate (524). The surface of the stabilizing rod (514) is slidably connected to the inner wall of the fifth circular hole (526).

5. The structure for preventing axial and angular displacement of a spline pair according to claim 4, Characterized in that: A reinforcing block (515) is fixedly connected to the side of the circular shaft (513) close to the inner wall of the first circular groove (516). The reinforcing block (515) is fixedly connected to the inner wall of the first circular groove (516).

6. The structure for preventing axial and angular displacement of a spline pair according to claim 2, Characterized in that: The inner wall of the first circular hole (51) is provided with a second circular groove (53). A latch (54) is slidably connected to the inner wall of the second circular groove (53). One end of the latch (54) is fixedly connected to a second spring (56), and the other end of the second spring (56) is fixedly connected to the inner wall of the second circular groove (53). A card slot (522) is provided on one side of the positioning pin (521). The size and shape of the surface of the latch (54) are adapted to the size and shape of the inner wall of the card slot (522).

7. A structure for preventing axial and angular displacement of a spline pair according to claim 6, wherein: A first limiting rod (57) is fixedly connected to the inner wall of the second circular groove (53). The first limiting rod (57) is located inside the second spring (56). A first limiting groove (55) is provided on the side of the latch (54) close to the second circular groove (53). The surface of the first limiting rod (57) is slidably connected to the inner wall of the first limiting groove (55).

8. A structure for preventing axial and angular displacement of a spline pair according to claim 2, wherein: A fourth circular hole (510) is provided on the side of the spline shaft (1) close to the third circular hole (58). A rectangular groove (511) is provided on the inner wall of the first circular groove (516). The inner wall of the rectangular groove (511) is connected to the inner wall of the fourth circular hole (510). A round hole plate (512) is fixedly connected to the inner wall of the rectangular groove (511). A push rod (517) is slidably connected to the inner wall of the fourth circular hole (510). One side of the push rod (517) is fixedly connected to a concave plate (518). A first clamping block (519) is fixedly connected to one side of the concave plate (518). A rectangular hole (527) is provided on one side of the connecting plate (524). A second clamping block (528) is fixedly connected to the inner wall of the rectangular hole (527). The surfaces of the first clamping block (519) and the second clamping block (528) are both triangular. A second circular hole (52) is provided on one side of the spline sleeve (3). The second circular hole (52) corresponds to the position of the fourth circular hole (510).

9. A structure for preventing axial and angular displacement of a spline pair according to claim 8, wherein: A second limiting rod (529) is fixedly connected to the side of the connecting plate (524) close to the rectangular hole (527). A second limiting groove (520) is provided on the side of the push rod (517) close to the concave plate (518). The surface of the second limiting rod (529) is slidably connected to the inner wall of the second limiting groove (520). The first limiting rod (57) is located inside the round hole plate (512).

10. A method for preventing axial and angular displacement of a spline pair, wherein: For the method for preventing axial and angular displacement of a spline pair according to any one of claims 1-9, the method includes the following steps: S1. First, manually move the spline shaft (1) and insert the spline shaft (1) into the spline sleeve (3) so that the shaft teeth (2) are engaged in the sleeve grooves (4) for connection; S2. While inserting the spline shaft (1) into the spline sleeve (3), the connection between the spline shaft (1) and the spline sleeve (3) is strengthened by the positioning device (5), and the spline shaft (1) is limited, so that the positioning device (5) intercepts the spline shaft (1) that is about to have axial or angular displacement due to vibration during transmission.

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