A combined hexagonal shaft

Abstract

The utility model relates to the technical field of hexagonal shafts, and discloses a combined hexagonal shaft, comprising a central shaft, an outer wall of the central shaft fixedly sleeved with a first shaft sleeve, a second shaft sleeve, a third shaft sleeve and a cutter rotating arm, an inner wall of the cutter rotating arm away from the first shaft sleeve is slidably connected with a cutter body, an inner wall of the cutter rotating arm is provided with a fixing device, and an inner wall of the central shaft is provided with a limiting device, by sleeve-connecting the first shaft sleeve, the second shaft sleeve and the third shaft sleeve on the outer wall of the central shaft, and then rotating a rotating rod, driving a sliding sleeve threadedly connected to the outer edge of the rotating rod to move in the inner wall of the central shaft, and squeezing the fixing rod during the movement of the sliding sleeve, so that the fixing rod extends from the inner wall of the central shaft and enters the limiting grooves provided in the inner walls of the first shaft sleeve, the second shaft sleeve and the third shaft sleeve, so as to realize the limiting fixing of the first shaft sleeve, the second shaft sleeve and the third shaft sleeve, and reduce the friction loss between the first shaft sleeve and the central shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of hexagonal shafts, in particular to a combined hexagonal shaft. Background Art

[0002] The shaft is a cylindrical object that passes through the middle of the bearing, wheel or gear, but a few are square. The shaft is a mechanical part that supports the rotating parts and rotates with them to transmit motion, torque or bending moment.

[0003] The existing combined hexagonal shaft can refer to the Chinese utility model patent with the authorization announcement number CN215720674U, which discloses a combined hexagonal shaft, "including a hexagonal shaft end, a hexagonal shaft middle part is provided on one side of the hexagonal shaft end, a hexagonal shaft upper part is provided on one side of the hexagonal shaft middle part, a first sleeve is sleeved on the hexagonal shaft middle part, and a second sleeve is sleeved on the hexagonal shaft middle part on one side of the first sleeve. In the utility model, one end of the hexagonal shaft middle part moves through the first sleeve, the second sleeve, the cutter rotating arm, the third sleeve and the fourth sleeve on the first sleeve, the second hexagonal hole, the cantilever hexagonal hole, the third sleeve and the fourth sleeve in sequence, so as to facilitate the installation of the first sleeve, the second sleeve, the cutter rotating arm, the third sleeve and the fourth sleeve on the hexagonal shaft middle part. The hexagonal shaft middle part is a hexagonal structure, and during the rotation process, it can stably drive the first sleeve, the second sleeve, the cutter rotating arm, the third sleeve and the fourth sleeve to rotate."

[0004] When the above device is in use, the middle part of the hexagonal shaft is a hexagonal structure. During the rotation process, it can stably drive the first sleeve, the second sleeve, the cutter rotating arm, the third sleeve and the fourth sleeve to rotate. However, during the use of the above device, it will cause greater friction between the components and the middle part of the hexagonal shaft, and the fixing effect between the components and the central axis is poor, resulting in a reduction in the service life of the device. In addition, the above device is not convenient for fixing and installing the cutter, which reduces the practicality of the device. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a combined hexagonal shaft, which has the advantages of improving the fixing effect between each component and the central shaft, preventing large friction between each component and the central shaft during rotation, and increasing the service life of the device. It also has the advantages of facilitating the installation and disassembly of the cutter and improving the practicality of the device, thereby solving the problems raised by the above-mentioned background technology.

[0006] The utility model provides the following technical solution: a combined hexagonal shaft, comprising a central shaft, the outer wall of the central shaft is fixedly sleeved with a first shaft sleeve, a second shaft sleeve, a third shaft sleeve and a cutter rotating arm, the inner wall of the cutter rotating arm away from the first shaft sleeve is slidably connected with a cutter body, the inner wall of the cutter rotating arm is provided with a fixing device, and the inner wall of the central shaft is provided with a limiting device;

[0007] The fixing device comprises a buffer spring and a clamping block, wherein the buffer spring pushes the clamping block into the inner wall of the cutter rotating arm to fix the cutter body and the cutter rotating arm together;

[0008] The limiting device comprises a rotating rod and a fixing rod. When the rotating rod rotates, the fixing rod is pushed into the inner walls of the third shaft sleeve and the first shaft sleeve to limit the third shaft sleeve and the first shaft sleeve.

[0009] As a preferred technical solution of the utility model, the fixing device also includes a telescopic rod, the buffer spring is slidably sleeved on the outer wall of the telescopic rod, one end of the telescopic rod is fixedly connected to the inner wall of the cutter body, and the other end is fixedly connected to the block.

[0010] As a preferred technical solution of the utility model, a slot is provided on the inner wall of the cutter rotating arm at a position corresponding to the block, and the inner wall of the slot is slidably connected to the outer wall of the block; a push rod is slidably connected to the inner wall of the cutter rotating arm, and the position of the push rod corresponds to the position of the block.

[0011] As a preferred technical solution of the utility model, the outer wall of the rotating rod is rotatably connected to the inner wall of the central shaft, the outer edge of the rotating rod is threadedly connected to a sliding sleeve, and the outer wall of the sliding sleeve is slidably connected to the inner wall of the central shaft.

[0012] As a preferred technical solution of the utility model, the inner wall of the central axis is slidably connected to the outer wall of the fixed rod, limited position circular blocks are welded and fixed at both ends of the fixed rod, and one end of the fixed rod is slidably connected to the inner wall of the third sleeve.

[0013] As a preferred technical solution of the utility model, a return spring is slidably sleeved on the outer wall of the fixing rod, and one end of the return spring is fixedly connected to the inner wall of the central shaft.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The combined hexagonal shaft is constructed by sleeve-connecting the first sleeve, the second sleeve and the third sleeve on the outer wall of the central shaft, and then rotating the rotating rod to drive the sliding sleeve threadedly connected to the outer edge of the rotating rod to move in the inner wall of the central shaft, and in the process of the sliding sleeve moving, the fixing rod is squeezed so that the fixing rod extends from the inner wall of the central shaft and enters the limiting grooves provided on the inner walls of the first sleeve, the second sleeve and the third sleeve, thereby realizing the limiting fixation of the first sleeve, the second sleeve and the third sleeve, and reducing the friction loss between the first sleeve and the third sleeve and the central shaft.

[0016] 2. The combined hexagonal shaft is configured such that one end of the cutter body is installed in the installation groove provided at the top of the cutter rotating arm, so that the inner wall of the cutter rotating arm squeezes the card block, and the card block is forced to shrink into the inner wall of the cutter body, and squeezes the telescopic rod and the buffer spring, so that the telescopic rod shrinks and the elastic potential energy of the buffer spring increases. When the position of the card block corresponds to the card groove provided on the inner wall of the cutter rotating arm, the elastic potential energy of the buffer spring is used to send the card block into the inner wall of the cutter rotating arm to achieve the installation of the cutter body. When the cutter body needs to be disassembled, the push rod is pressed to push the card block out of the inner wall of the cutter rotating arm, so that the cutter body and the cutter rotating arm are separated from each other, thereby achieving the disassembly of the cutter body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0019] Figure 3 For this utility model Figure 2 Schematic diagram of the structure at A in the middle;

[0020] Figure 4 It is a schematic diagram of the fixing structure of the utility model.

[0021] In the figure: 1, central axis; 2, first sleeve; 3, second sleeve; 4, third sleeve; 5, cutter rotating arm; 6, cutter body; 7, fixing device; 701, telescopic rod; 702, buffer spring; 703, block; 704, push rod; 8, limit device; 801, rotating rod; 802, sliding sleeve; 803, fixing rod; 804, reset spring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 - Figure 4 A combined hexagonal shaft comprises a central shaft 1, a first shaft sleeve 2, a second shaft sleeve 3, a third shaft sleeve 4 and a cutter rotating arm 5 are fixedly sleeved on the outer wall of the central shaft 1, a cutter body 6 is slidably connected to the inner wall of the end of the cutter rotating arm 5 away from the first shaft sleeve 2, a fixing device 7 is arranged on the inner wall of the cutter rotating arm 5, and a limiting device 8 is arranged on the inner wall of the central shaft 1;

[0024] The fixing device 7 includes a buffer spring 702 and a block 703. The buffer spring 702 pushes the block 703 into the inner wall of the cutter rotating arm 5 to fix the cutter body 6 and the cutter rotating arm 5 together. The fixing device 7 also includes a telescopic rod 701. The buffer spring 702 is slidably sleeved on the outer wall of the telescopic rod 701. One end of the telescopic rod 701 is fixedly connected to the inner wall of the cutter body 6, and the other end is fixedly connected to the block 703. One end of the cutter body 6 is installed at the top of the cutter rotating arm 5. The clamping block 703 is squeezed into the installation groove of the cutter rotating arm 5, so that the inner wall of the cutter rotating arm 5 squeezes the clamping block 703, and the clamping block 703 is forced to shrink into the inner wall of the cutter body 6, and squeezes the telescopic rod 701 and the buffer spring 702, so that the telescopic rod 701 shrinks and the elastic potential energy of the buffer spring 702 increases. When the position of the clamping block 703 corresponds to the clamping groove provided on the inner wall of the cutter rotating arm 5, the elastic potential energy of the buffer spring 702 is used to send the clamping block 703 into the inner wall of the cutter rotating arm 5, so as to realize the installation of the cutter body 6.

[0025] A slot is provided at a position on the inner wall of the cutter rotating arm 5 corresponding to the block 703, and the inner wall of the slot is slidably connected to the outer wall of the block 703. A push rod 704 is slidably connected to the inner wall of the cutter rotating arm 5, and the position of the push rod 704 corresponds to the position of the block 703. When the cutter body 6 needs to be disassembled, the push rod 704 is pressed to push the block 703 out of the inner wall of the cutter rotating arm 5, so that the cutter body 6 and the cutter rotating arm 5 are separated from each other, thereby realizing the disassembly of the cutter body 6.

[0026] The limiting device 8 includes a rotating rod 801 and a fixed rod 803. When the rotating rod 801 rotates, it pushes the fixed rod 803 into the inner walls of the third shaft sleeve 4 and the first shaft sleeve 2 to limit the third shaft sleeve 4 and the first shaft sleeve 2. The outer wall of the rotating rod 801 is rotatably connected to the inner wall of the central shaft 1, and the outer edge of the rotating rod 801 is threadedly connected with a sliding sleeve 802. The outer wall of the sliding sleeve 802 is slidably connected to the inner wall of the central shaft 1, so that the first shaft sleeve 2, the second shaft sleeve 3 and the third shaft sleeve 4 are sleeved on the outer wall of the central shaft 1, and then the rotating rod 801 is rotated to drive the sliding sleeve 802 threaded on the outer edge of the rotating rod 801 to move in the inner wall of the central shaft 1, and the fixing rod 803 is squeezed during the movement of the sliding sleeve 802, so that the fixing rod 803 extends out from the inner wall of the central shaft 1 and enters the limiting grooves provided in the inner walls of the first shaft sleeve 2, the second shaft sleeve 3 and the third shaft sleeve 4, thereby realizing the limiting fixation of the first shaft sleeve 2, the second shaft sleeve 3 and the third shaft sleeve 4.

[0027] The inner wall of the central axis 1 is slidably connected to the outer wall of the fixed rod 803, and limited position circular blocks are welded and fixed at both ends of the fixed rod 803. One end of the fixed rod 803 is slidably connected to the inner wall of the third sleeve 4. The outer wall of the fixed rod 803 is slidably sleeved with a return spring 804, and one end of the return spring 804 is fixedly connected to the inner wall of the central axis 1. When the sliding sleeve 802 releases the extrusion limit on the fixed rod 803, the return spring 804 is used to reset the fixed rod 803, which is convenient for removing the first sleeve 2, the second sleeve 3 and the third sleeve 4.

[0028] Working principle: when in use, the first sleeve 2, the second sleeve 3 and the third sleeve 4 are sleeved on the outer wall of the central shaft 1, and then the rotating rod 801 is rotated to drive the sliding sleeve 802 connected to the outer edge of the rotating rod 801 to move in the inner wall of the central shaft 1, and the fixing rod 803 is squeezed during the movement of the sliding sleeve 802, so that the fixing rod 803 extends from the inner wall of the central shaft 1 and enters the limiting grooves provided in the inner walls of the first sleeve 2, the second sleeve 3 and the third sleeve 4, so as to achieve the limiting fixation of the first sleeve 2, the second sleeve 3 and the third sleeve 4, reduce the friction loss between the central shaft 1, and install one end of the cutter body 6 in the installation groove provided on the top of the cutter rotating arm 5, so that The inner wall of the cutter rotating arm 5 squeezes the block 703, and the block 703 is forced to retract into the inner wall of the cutter body 6, and squeezes the telescopic rod 701 and the buffer spring 702, so that the telescopic rod 701 shrinks and the elastic potential energy of the buffer spring 702 increases. When the position of the block 703 corresponds to the slot provided on the inner wall of the cutter rotating arm 5, the elastic potential energy of the buffer spring 702 is used to send the block 703 into the inner wall of the cutter rotating arm 5 to achieve the installation of the cutter body 6. When the cutter body 6 needs to be disassembled, the push rod 704 is pressed to push the block 703 out of the inner wall of the cutter rotating arm 5, so that the cutter body 6 and the cutter rotating arm 5 are separated from each other, and the cutter body 6 is disassembled.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined hexagonal shaft, comprising a central shaft (1), characterized in that: The outer wall of the central shaft (1) is fixedly sleeved with a first shaft sleeve (2), a second shaft sleeve (3), a third shaft sleeve (4) and a cutter rotating arm (5); the inner wall of one end of the cutter rotating arm (5) away from the first shaft sleeve (2) is slidably connected with a cutter body (6); the inner wall of the cutter rotating arm (5) is provided with a fixing device (7); and the inner wall of the central shaft (1) is provided with a limiting device (8); The fixing device (7) comprises a buffer spring (702) and a clamping block (703), wherein the buffer spring (702) pushes the clamping block (703) into the inner wall of the cutter rotating arm (5) to fix the cutter body (6) and the cutter rotating arm (5) together; The limiting device (8) comprises a rotating rod (801) and a fixing rod (803); when the rotating rod (801) rotates, it pushes the fixing rod (803) into the inner walls of the third shaft sleeve (4) and the first shaft sleeve (2) to perform limiting processing on the third shaft sleeve (4) and the first shaft sleeve (2).

2. The combined hexagonal shaft according to claim 1, characterized in that: The fixing device (7) further comprises a telescopic rod (701), the buffer spring (702) being slidably sleeved on the outer wall of the telescopic rod (701), one end of the telescopic rod (701) being fixedly connected to the inner wall of the cutter body (6), and the other end being fixedly connected to the clamping block (703).

3. The combined hexagonal shaft according to claim 1, characterized in that: A slot is provided at a position on the inner wall of the cutter rotating arm (5) corresponding to the block (703), and the inner wall of the slot is slidably connected to the outer wall of the block (703). A push rod (704) is slidably connected to the inner wall of the cutter rotating arm (5), and the position of the push rod (704) corresponds to the position of the block (703).

4. The combined hexagonal shaft according to claim 1, characterized in that: The outer wall of the rotating rod (801) is rotatably connected to the inner wall of the central shaft (1); the outer edge of the rotating rod (801) is threadedly connected to a sliding sleeve (802); and the outer wall of the sliding sleeve (802) is slidably connected to the inner wall of the central shaft (1).

5. The combined hexagonal shaft according to claim 4, characterized in that: The inner wall of the central shaft (1) is slidably connected to the outer wall of the fixed rod (803), limited position circular blocks are welded and fixed at both ends of the fixed rod (803), and one end of the fixed rod (803) is slidably connected to the inner wall of the third shaft sleeve (4).

6. The combined hexagonal shaft according to claim 5, characterized in that: A return spring (804) is slidably sleeved on the outer wall of the fixed rod (803), and one end of the return spring (804) is fixedly connected to the inner wall of the central shaft (1).

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