Transmission rotating shaft

Abstract

The utility model discloses a transmission rotating shaft, which comprises a rotating part, the rotating part is cylindrical, the rotating part is provided with a limiting shifting groove used for being matched with a matching part along a generatrix, the limiting shifting groove comprises a limiting plane and a guide plane, the rotating part rotates, and when the facing direction of the limiting plane is opposite to the rotating direction of the rotating part, the limiting shifting groove is matched with the matching part. The limiting plane can limit rotation of the rotating part or push the matched part to move by abutting against the matched part, when the facing direction of the limiting plane is opposite to the rotating direction of the rotating part, the limiting plane does not abut against the matched part, and the rotating part is not controlled by the guide plane and the limiting plane.

Description

Technical Field

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

[0002] There are many types of rotating shafts. The shaft mainly plays a transmission role. The shaft can be provided with holes, keyways, spline segments, etc. for installation for mating connection. However, when the rotation of the rotating shaft requires the mating parts to be moved or the rotation of the shaft to be limited, corresponding components need to be installed on the shaft to achieve the movement of the mating parts or the limitation of the rotation of the shaft. The shaft itself cannot move the mating parts or its own rotation is restricted by the mating parts. Utility Model Content

[0003] The purpose of the utility model is to provide a transmission shaft for overcoming the above-mentioned defects in the prior art. The transmission shaft has a structure in which the shaft can rotate to push the mating parts or be restricted in rotation by the mating parts without installing corresponding parts.

[0004] In order to solve the above technical problems, the present invention solves the problems through the following technical solutions: a transmission shaft, including a rotating part, the rotating part is cylindrical, and the rotating part is provided with a limit groove along the busbar for cooperating with a mating part, the limit groove includes a limit plane and a guide plane, the rotating part rotates, when the limit plane faces a direction opposite to the rotation direction of the rotating part, the limit plane can limit the rotation of the rotating part or push the mating part to move by abutting the mating part, when the limit plane faces a direction opposite to the rotation direction of the rotating part, the limit plane does not abut against the mating part, and the rotating part is not controlled by the guide plane and the limit plane.

[0005] By adopting the above technical solution, the limiting plane cooperates with the mating part. When the limiting plane abuts against the mating part, it can limit the shaft from continuing to rotate in that direction. After the shaft changes its rotation direction, the mating plane does not abut against the limiting plane and directly enters the guide plane. Therefore, the shaft in this rotation direction is not affected by the limiting plane, and can play the role of limiting the rotation of the shaft, limiting the direction of the shaft, pushing or moving the mating part, rotating one circle to position it, or positioning the initial angle of the shaft by controlling the forward and reverse rotation.

[0006] The present invention is further configured such that: the limiting plane is perpendicular to the central axis of the rotating part.

[0007] By adopting the above technical solution, the advantage of being perpendicular to the central axis of the rotating part is that it is easy to calculate.

[0008] The utility model is further configured such that: the guide plane is perpendicular to the limiting plane.

[0009] By adopting the above technical solution, the guide plane is used to play a transition guiding role when the mating parts enter the limit groove from the outer side of the rotating part or move out of the limit groove to the outer side of the rotating part. When the guide plane is perpendicular to the limit plane, the limit plane can form effective abutment with other mating parts.

[0010] The present invention is further configured as follows: the width of the limiting plane is the depth of the limiting groove, and the depth of the limiting groove is 10% to 20% of the diameter of the rotating part.

[0011] By adopting the above technical solution, when the limiting groove is of this depth, the limiting contact surface of the limiting plane can be guaranteed, and at the same time, a smooth transition between the guide plane and the outer plane of the rotating part can be guaranteed.

[0012] The present invention is further configured as follows: the rotating shaft further comprises a positioning portion, the positioning portion is connected to the rotating portion, and the diameter of the positioning portion is greater than the diameter of the rotating portion.

[0013] By adopting the above technical solution, the positioning part mainly serves to limit the excessive movement of the matching parts along the axis of the rotating part, and the rotating part can also be used to install the bearing to ensure smooth rotation of the shaft.

[0014] The utility model is further configured as follows: a circular arc chamfer is provided at the connection between the limiting plane and the positioning portion.

[0015] By adopting the above technical solution, the arc chamfer has the function of reducing stress concentration and preventing the shaft from breaking during the limiting process.

[0016] The present invention is further configured as follows: the rotating shaft further comprises a connecting portion, and the connecting portion is provided with a positioning countersunk hole and a fixing hole.

[0017] By adopting the above technical solution, the positioning countersunk hole and the fixing hole are used for positioning and fixing the connecting part respectively.

[0018] The utility model is further configured as follows: the rotating shaft is sequentially formed with a rotating portion, a positioning portion and a connecting portion.

[0019] By adopting the above technical solution, the shaft can be easily processed through this sequence. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of a transmission shaft structure in an embodiment;

[0021] Figure 2 It is a structural schematic diagram of another direction of a transmission shaft in an embodiment.

[0022] The names of the parts indicated by the numerical labels in the above drawings are as follows: 1. Rotating part; 10. Limiting groove; 101. Limiting plane; 102. Guide plane; 2. Positioning part; 20. Arc chamfer; 3. Connecting part; 31. Fixing hole; 32. Positioning countersunk hole; 40. Center hole; 50. Chamfer. DETAILED DESCRIPTION

[0023] The present invention is described in further detail below with reference to the accompanying drawings and embodiments.

[0024] Example:

[0025] A transmission shaft, see Figure 1 , a rotating part 1, a positioning part 2 and a connecting part 3 are formed in sequence, the rotating part 1, the positioning part 2 and the connecting part 3 are all cylindrical and the central axes are arranged to coincide, the rotating part 1 has the smallest diameter, the connecting part 3 has the largest diameter, and a limit shift groove 10 is provided on the outer side of the rotating part 1 along the cylindrical generatrix. The limit shift groove 10 can be used in conjunction with the matching parts outside the rotating shaft, and the matching parts can abut against the outer surface of the rotating part 1. The length direction of the limit shift groove 10 is equal to the height in the axis direction of the rotating part 1. The limit shift groove 10 is provided with at least one in the rotating part. In the embodiment, only one is provided, but it is not limited to one. When multiple are provided, different angle positioning can be achieved according to the angle between the limiting groove and the limiting groove 10. The limiting groove 10 only includes a limiting plane 101 and a guide plane 102. The limiting plane 101 is perpendicular to the central axis of the rotating part 1, and the guide plane 102 is perpendicular to the limiting plane 101. The depth of the limiting groove 10 is the width of the limiting plane 101. The depth of the limiting groove 10 is 10% to 20% of the diameter of the rotating part 1. In this embodiment, the limiting groove 10 The depth of the pull groove 10 is 15% of the diameter of the rotating part 1. When the rotating shaft rotates around the central axis, when the limiting plane 101 faces in a direction opposite to the rotating direction of the rotating shaft, the limiting plane 101 faces in the direction facing the rotating direction of the rotating shaft. At this time, when the limiting plane 101 abuts with other matching parts, the limiting plane 101 can limit the rotation of the rotating shaft or the limiting plane 101 pushes the matching parts abutting with it to move synchronously. When the limiting plane 101 faces in a direction opposite to the rotating direction of the rotating shaft, that is, the limiting plane 101 faces away from the rotating shaft. In the direction of rotation of the shaft, other parts cannot abut against the limiting plane 101, and thus cannot play a role in limiting the rotation of the shaft or pushing the mating parts. The shaft is not controlled by the limiting plane 101 at this time, and the mating parts cannot abut against the limiting plane 101 during the rotation process. During the rotation direction of the shaft, the mating parts are directly abutted against the guide plane 102. The guide plane 102 is used to play a transition guiding role when the mating parts enter the limiting shift groove 10 from the outer side surface of the rotating part 1 or move out of the limiting shift groove 10 to the outer side surface of the rotating part 1.

[0026] See also Figure 1The diameter of the positioning part 2 is larger than that of the rotating part 1. A circular chamfer 20 is provided between the step surface formed by the diameter difference between the two and the limiting plane 101. The diameter of the connecting part 3 is larger than that of the positioning part 2. A fixing hole 31 is provided on the step surface formed by the diameter difference between the two. The fixing hole 31 is a threaded hole. A plurality of fixing holes 31 can be provided. The plurality of fixing holes 31 are arranged in a circular array. Figure 2 A positioning countersunk hole 32 is provided on the side of the connecting part 3 away from the positioning part 2, and a center hole 40 is provided along the center axis of the rotating shaft. The center hole 40 is communicated with the positioning countersunk hole 32, and the part cooperating with the connecting part 3 is convexly provided with a positioning cylinder. The positioning countersunk hole 32 can play a positioning role of the connecting part 3 by snapping together with the positioning cylinder. The fixing hole 31 is threadedly connected to the workpiece with the positioning cylinder through a screw, and the connecting part 3 plays a role of fixing and positioning. A chamfer 50 is provided on the end of the rotating part 1 away from the positioning part 2 to facilitate the cooperation of the rotating part 1 with other hole-type parts.

Claims

1. A transmission shaft, characterized in that: The invention comprises a rotating part (1), wherein the rotating part (1) is cylindrical, and the rotating part (1) is provided with a limiting shifting groove (10) for matching with a matching part along a busbar, and the limiting shifting groove (10) is provided with at least one limiting shifting groove (10), and the limiting shifting groove (10) only comprises a limiting plane (101) and a guide plane (102), and the guide plane (102) is used for introducing or exporting the matching part. When the rotating part (1) rotates, when the limiting plane (101) faces a direction opposite to the rotation direction of the rotating part (1), the limiting plane (101) can limit the rotation of the rotating part (1) or push the matching part to move by abutting against the matching part. When the limiting plane (101) faces a direction opposite to the rotation direction of the rotating part (1), the limiting plane (101) does not abut against the matching part, and the rotating part (1) is not controlled by the guide plane (102) and the limiting plane (101).

2. A transmission shaft according to claim 1, characterized in that: The limiting plane (101) is perpendicular to the central axis of the rotating part (1).

3. A transmission shaft according to claim 2, characterized in that: The guide plane (102) is perpendicular to the limiting plane (101).

4. A transmission shaft according to claim 3, characterized in that: The width of the limiting plane (101) is the depth of the limiting groove (10), and the depth of the limiting groove (10) is 10% to 20% of the diameter of the rotating part (1).

5. The transmission shaft according to claim 1, characterized in that: The rotating shaft further comprises a positioning portion (2), the positioning portion (2) being connected to the rotating portion (1), and the diameter of the positioning portion (2) being larger than the diameter of the rotating portion (1).

6. The transmission shaft according to claim 5, characterized in that: A circular chamfer (20) is provided at the connection between the limiting plane (101) and the positioning portion (2).

7. The transmission shaft according to claim 6, characterized in that: The rotating shaft further comprises a connecting portion (3), and the connecting portion (3) is provided with a positioning countersunk hole (32) and a fixing hole (31).

8. The transmission shaft according to claim 7, characterized in that: The rotating shaft is sequentially formed with a rotating portion (1), a positioning portion (2) and a connecting portion (3).

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