A spline positioning mandrel

Abstract

The utility model relates to the technical field of mandrel, put forward a spline positioning mandrel, including first axle body and setting second axle body in first axle body opposite side, the one side of first axle body is set up with movable slot, the inner wall fixed connection of movable slot has fixed sleeve, the both sides of fixed sleeve inner wall all set up with fixed slot, second axle body is connected in spline other side and is inserted in the inside of first axle body, the one side fixed connection of second axle body has connecting sleeve, the inside of connecting sleeve is provided with the limiting component that can connect fixed first axle body with second axle body, the utility model discloses through the fixed slot between limiting component and fixed sleeve inner wall both sides and carries out the connection, can make mandrel better and fix between spline, can carry out quick positioning to spline, and the spline is conveniently disassembled, solved the quick positioning problem inconvenient to spline of positioning mandrel of existing.

Description

Technical Field

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

[0002] A spline is a circumferential connector consisting of multiple protrusions and grooves on a shaft and hub. The positioning mandrel inside the spline allows the spline to be mounted on the outside of the mandrel during spline machining. By mounting the mandrel and controlling its rotation, the spline can be easily machined.

[0003] A search revealed that the spline positioning mandrel described in publication number CN207223126U comprises a spline mandrel with a first inner hole, a second inner hole, a third inner hole, and an adjusting cavity that are interconnected along the axial direction of the mandrel's rotation center. The adjusting cavity is a conical shape with a larger outer opening and a smaller inner opening. Spline teeth are evenly distributed along the circumference of the outer surface of the spline mandrel corresponding to the portion forming the adjusting cavity, with a spline tooth groove formed between adjacent spline teeth. Strip grooves are evenly distributed on the circumferential surface of the spline mandrel forming the adjusting cavity, and these strip grooves connect to the adjusting cavity. A tensioning mandrel is fitted into the adjusting cavity. This utility model's spline positioning mandrel is a tensioning type, providing accurate positioning; it is safe, reliable, and easy to operate; and its structure is simple, reliable, and easy to maintain.

[0004] However, the above-mentioned positioning mandrel still has the following problems: the positioning mandrel positions the spline by rotating a screw and threadedly connecting it to the tensioning mandrel. This positioning method is relatively complicated and it is inconvenient to rotate the tensioning mandrel and the positioning mandrel to cooperate, thus affecting the rapid positioning of the spline. Furthermore, during the installation process between the mandrels, impacts can easily occur, causing damage to the mandrel. Utility Model Content

[0005] This invention proposes a spline positioning mandrel, which solves the problems of inconvenience in quickly positioning splines and damage to the mandrel due to impact.

[0006] The technical solution of this utility model is as follows: A spline positioning mandrel includes a first shaft and a second shaft disposed on the opposite side of the first shaft. A movable groove is provided on one side of the first shaft, and a fixing sleeve is fixedly connected to the inner wall of the movable groove. Fixing grooves are provided on both sides of the inner wall of the fixing sleeve. The second shaft is snapped onto the other side of the spline and inserted into the interior of the first shaft. A connecting sleeve is fixedly connected to one side of the second shaft. A limiting component that can connect and fix the first shaft and the second shaft is provided inside the connecting sleeve. Buffer components that can protect the first shaft and the second shaft when they are connected are provided at the four corners of the bottom wall of the movable groove.

[0007] The buffer assembly includes a buffer sleeve, which is fixedly connected to the four corners of the inner wall of the movable groove. A movable baffle is slidably connected inside the buffer sleeve, and a buffer rod is fixedly connected to one side of the movable baffle.

[0008] Preferably, a first spring is fixedly connected to the inner bottom wall of each buffer sleeve, and the top end of each first spring is fixedly connected to a movable baffle.

[0009] Preferably, the limiting component includes a fixing block, which is fixedly connected to both sides of the inner wall of the second shaft. An elastic plate is fixedly connected to one side of each fixing block, and a limiting block is fixedly connected to the opposite side of each elastic plate. The limiting blocks are respectively movably inserted into the inside of the fixing groove.

[0010] Preferably, a movable plate is movably connected inside the second shaft, a support rod is fixedly connected to one side of the movable plate, a connecting plate is fixedly connected to one end of the support rod, and a linkage rod is rotatably connected to both sides of the connecting plate, with one end of the linkage rod rotatably connected to an elastic plate respectively.

[0011] Preferably, a pressing block is slidably connected to one end of the second shaft, one end of the pressing block is fixedly connected to the middle of the movable plate, and a second spring is fixedly connected to one side of the movable plate.

[0012] Preferably, the inner wall of the first shaft is provided with uniformly distributed positioning grooves, and the outer side of the connecting sleeve is fixedly connected with uniformly distributed positioning blocks, which are slidably connected inside the positioning grooves.

[0013] Preferably, a first locking block is fixedly connected to one side of the second shaft, and a second locking block is fixedly connected to one side of the first shaft.

[0014] The beneficial effects of this utility model are as follows: In this invention, the connecting sleeve is inserted into the movable groove, which enables the connection between the first shaft and the second shaft. Furthermore, the connection between the limiting component and the fixing grooves on both sides of the inner wall of the fixing sleeve enables the mandrel to be better fixed to the spline, allowing for quick positioning of the spline and convenient disassembly of the spline. This solves the problem that existing positioning mandrels are inconvenient for quick positioning of splines. In this invention, the positioning block is inserted into the positioning groove, which allows the connecting sleeve to be inserted into the first shaft body for easy connection. The first and second locking blocks can be used to easily position the spline on both sides to prevent the spline from sliding. The buffer assembly can buffer the first and second shaft bodies to prevent them from colliding and being damaged. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a schematic diagram of the structure proposed in this utility model; Figure 2 The present utility model proposes Figure 1 Enlarged structural diagram at point A; Figure 3 This is a schematic diagram of the buffer component structure proposed in this utility model; Figure 4 This is a schematic diagram of the limiting component structure proposed in this utility model; In the diagram: 1. First shaft; 2. Second shaft; 3. Movable groove; 4. Fixed sleeve; 5. Connecting sleeve; 6. Positioning block; 7. Positioning groove; 8. Buffer assembly; 81. Buffer sleeve; 82. First spring; 83. Movable baffle; 84. Buffer rod; 9. Limiting assembly; 91. Fixed block; 92. Elastic plate; 93. Limiting block; 94. Movable plate; 95. Second spring; 96. Support rod; 97. Connecting plate; 98. Linkage rod; 99. Pressing block; 10. First locking block; 11. Second locking block; 12. Fixed groove. Detailed Implementation

[0017] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0018] Please see Figure 1-2This utility model provides a spline positioning mandrel technical solution: A spline positioning mandrel includes a first shaft 1 and a second shaft 2 disposed on the opposite side of the first shaft 1. A movable groove 3 is formed on one side of the first shaft 1, and a fixing sleeve 4 is fixedly connected to the inner wall of the movable groove 3. Fixing grooves 12 are formed on both sides of the inner wall of the fixing sleeve 4. The second shaft 2 is snapped onto the other side of the spline and inserted into the interior of the first shaft 1. A connecting sleeve 5 is fixedly connected to one side of the second shaft 2. A limiting component 9 is provided inside the connecting sleeve 5 to connect and fix the first shaft 1 and the second shaft 2. The four corners of the bottom wall of the movable groove 3 are provided with a limiting component 9 to fix the first shaft 1. The buffer assembly 8, which plays a protective role when connected to the second shaft 2, has evenly distributed positioning grooves 7 on the inner wall of the first shaft 1. Evenly distributed positioning blocks 6 are fixedly connected to the outer side of the connecting sleeve 5. The positioning blocks 6 are slidably connected inside the positioning grooves 7. The positioning blocks 6 are inserted into the positioning grooves 7 to prevent relative rotation between the first shaft 1 and the second shaft 2. Evenly distributed first locking blocks 10 are fixedly connected to one side of the second shaft 2, and evenly distributed second locking blocks 11 are fixedly connected to one side of the first shaft 1. The first locking blocks 10 and the second locking blocks 11 can be connected and positioned on both sides of the spline to prevent the spline from rotating.

[0019] Please see Figure 3 The buffer assembly 8 includes a buffer sleeve 81, which is fixedly connected to the four corners of the inner wall of the movable groove 3. A movable baffle 83 is slidably connected inside the buffer sleeve 81. A buffer rod 84 is fixedly connected to one side of the movable baffle 83. A first spring 82 is fixedly connected to the inner bottom wall of the buffer sleeve 81. The top of the first spring 82 is fixedly connected to the movable baffle 83. By sliding the buffer rod 84 inside the buffer sleeve 81, the first spring 82 can be compressed, thereby buffering the second shaft 2 and preventing damage caused by impact with the first shaft 1.

[0020] Please see Figure 4The limiting component 9 includes a fixing block 91, which is fixedly connected to both sides of the inner wall of the second shaft 2. An elastic plate 92 is fixedly connected to one side of the fixing block 91, and a limiting block 93 is fixedly connected to the opposite side of the elastic plate 92. The limiting blocks 93 are movably inserted into the inside of the fixing groove 12. A movable plate 94 is movably connected inside the second shaft 2. A support rod 96 is fixedly connected to one side of the movable plate 94. A connecting plate 97 is fixedly connected to one end of the support rod 96. A linkage rod 98 is rotatably connected to both sides of the connecting plate 97. One end of the linkage rod 98 is rotatably connected to the elastic plate 92. A pressing block 99 is slidably connected to one end of the second shaft 2. One end of the pressing block 99 is fixedly connected to the middle of the movable plate 94. A second spring 95 is fixedly connected to one side of the movable plate 94. Through the support of the limiting block 93 by the elastic plate 92, the limiting block 93 can be inserted into the inside of the fixing groove 12, so that the second shaft 2 can be stably installed inside the first shaft 1, thereby enabling the spline to be positioned.

[0021] The working principle and usage process of this utility model are as follows: The first shaft 1 and the second shaft 2 are separated, and each shaft 1 and shaft 2 is inserted into the spline from both sides. The connecting sleeve 5 inside the second shaft 2 is inserted into the first shaft 1. The positioning block 6 is aligned with the positioning groove 7, and the positioning block 6 is inserted into the positioning groove 7, thus connecting the first shaft 1 and the second shaft 2. Then, through the action of the first locking block 10 and the second locking block 11, the first shaft 1 and the second shaft 2 are connected to the spline, preventing relative rotation between the shaft and the spline and avoiding deviation. Then, the second spring 95 pushes the movable plate 94, which in turn drives the support rod 96, keeping the elastic plate 92 in place. In normal condition, the limiting block 93 is locked inside the positioning groove 12, which allows the first shaft 1 and the second shaft 2 to position the spline. By pushing the pressing block 99 downward, the movable plate 94 is moved, which allows the support rod 96 to push the connecting plate 97. Through the linkage rod 98, the elastic plate 92 is simultaneously deformed towards the center, causing the limiting block 93 to move out of the fixed groove 12. This releases the fixed state between the first shaft 1 and the second shaft 2, making it easier to disassemble the spline. Furthermore, through the combined action of the first spring 82 and the buffer rod 84, after the connecting sleeve 5 is inserted into the movable groove 3, it can buffer the second shaft 2 as it is inserted into the first shaft 1, preventing damage caused by impact during installation.

[0022] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A spline positioning mandrel, comprising a first shaft body (1) and a second shaft body (2) disposed on the opposite side of the first shaft body (1), characterized in that, The first shaft (1) has a movable groove (3) on one side, and a fixed sleeve (4) is fixedly connected to the inner wall of the movable groove (3). Fixed grooves (12) are provided on both sides of the inner wall of the fixed sleeve (4). The second shaft (2) is snapped onto the other side of the spline and inserted into the inside of the first shaft (1). A connecting sleeve (5) is fixedly connected to one side of the second shaft (2). A limiting component (9) is provided inside the connecting sleeve (5) to connect and fix the first shaft (1) and the second shaft (2). Buffer components (8) are provided at the four corners of the bottom wall of the movable groove (3) to protect the first shaft (1) and the second shaft (2) when they are connected. The buffer assembly (8) includes a buffer sleeve (81), which is fixedly connected to the four corners of the inner wall of the movable groove (3). A movable baffle (83) is slidably connected inside the buffer sleeve (81), and a buffer rod (84) is fixedly connected to one side of the movable baffle (83).

2. A spline positioning mandrel according to claim 1, wherein, The inner bottom wall of each buffer sleeve (81) is fixedly connected with a first spring (82), and the top of each first spring (82) is fixedly connected to a movable baffle (83).

3. A spline positioning mandrel according to claim 1, wherein, The limiting component (9) includes a fixing block (91), which is fixedly connected to both sides of the inner wall of the second shaft (2). An elastic plate (92) is fixedly connected to one side of the fixing block (91), and a limiting block (93) is fixedly connected to the opposite side of the elastic plate (92). The limiting blocks (93) are respectively movably inserted into the inside of the fixing groove (12).

4. A spline positioning mandrel according to claim 3, wherein, The second shaft (2) is movably connected to a movable plate (94). A support rod (96) is fixedly connected to one side of the movable plate (94). A connecting plate (97) is fixedly connected to one end of the support rod (96). A linkage rod (98) is rotatably connected to both sides of the connecting plate (97). One end of the linkage rod (98) is rotatably connected to the elastic plate (92).

5. A spline positioning mandrel according to claim 3, wherein, One end of the second shaft (2) is slidably connected to a pressing block (99), one end of the pressing block (99) is fixedly connected to the middle of the movable plate (94), and one side of the movable plate (94) is fixedly connected to a second spring (95).

6. A spline positioning mandrel according to claim 1 wherein, The inner wall of the first shaft (1) is provided with uniformly distributed positioning grooves (7), and the outer side of the connecting sleeve (5) is fixedly connected with uniformly distributed positioning blocks (6), and the positioning blocks (6) are slidably connected inside the positioning grooves (7).

7. A spline positioning mandrel as defined in claim 1 wherein, The second shaft (2) is fixedly connected to one side with a uniformly distributed first locking block (10), and the first shaft (1) is fixedly connected to one side with a uniformly distributed second locking block (11).

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