Eccentric shaft

Abstract

The utility model relates to the technical field of eccentric shafts, and particularly discloses an eccentric shaft which comprises an eccentric shaft neck, a shaft body and a connecting shaft, the connecting shaft is fixedly installed in the middle of the shaft body, a rotary knob is arranged on the side edge of the shaft body in a rotating mode, a movable opening is formed in the shaft body, a lead screw is fixedly installed at the end of the rotary knob and arranged in the movable opening, and the eccentric shaft neck is connected with the connecting shaft. A movable opening is formed in the shaft body, an adjusting rod is horizontally and slidably arranged on the movable opening and is in threaded connection with the lead screw, an adjusting opening is formed in the shaft body and is communicated with the movable opening, the adjusting rod is movably arranged in the adjusting opening, an adjusting block is horizontally and slidably arranged on the adjusting opening, and the end of the adjusting rod and the side edge of the adjusting block are fixedly installed. The eccentric shaft neck is fixedly installed on the top face of the adjusting block, and the eccentric shaft can adjust the position of the eccentric shaft neck, so that the motion stroke of a driven component is adjusted, and the applicability of the eccentric shaft is remarkably improved.

Description

Technical Field

[0001] This utility model belongs to the field of eccentric shaft technology, and particularly relates to an eccentric shaft. Background Technology

[0002] An eccentric shaft is a mechanical shaft in which the center of rotation does not coincide with the geometric center. Its key feature is that one or more crank pins or eccentric sections are machined on the shaft body that are off-center. When the shaft rotates, these eccentric parts will make circular motion around the center of rotation of the shaft, thereby converting the continuous rotational motion of the shaft into the reciprocating linear motion of the connecting rod, slider or other components. It is the core component for realizing motion conversion in equipment such as engine crankshafts and stamping machines.

[0003] Existing eccentric shafts mostly adopt a fixed eccentric journal design, whose eccentricity is not adjustable and can only output a single fixed stroke and motion trajectory, which limits the applicability of the eccentric shaft. This needs to be improved, so an eccentric shaft is proposed. Utility Model Content

[0004] The purpose of this invention is to provide an eccentric shaft to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an eccentric shaft, comprising an eccentric journal, a shaft body, and a connecting shaft, wherein the connecting shaft is fixedly installed in the middle of the shaft body, a knob is rotatably provided on the side of the shaft body, a movable opening is provided inside the shaft body, a lead screw is fixedly installed at the end of the knob, the lead screw is disposed in the movable opening, an adjusting rod is horizontally slidably disposed on the movable opening, the adjusting rod is threadedly connected to the lead screw, an adjusting opening is provided on the shaft body, the adjusting opening is connected to the movable opening, the adjusting rod is movably disposed in the adjusting opening, an adjusting block is horizontally slidably disposed on the adjusting opening, the end of the adjusting rod is fixedly installed on the side of the adjusting block, and the eccentric journal is fixedly installed on the top surface of the adjusting block.

[0006] As a further description of the above solution: by setting up the eccentric journal, shaft body, connecting shaft, knob, movable port, lead screw, adjusting rod, adjusting port, and adjusting block to work together, the position of the eccentric journal is adjusted, thereby adjusting the travel of the driven part and significantly improving the applicability of the eccentric shaft.

[0007] Preferably, a rubber ring is provided on the side of the knob, and there is resistance between the rubber ring and the shaft.

[0008] As a further description of the above solution: a rubber ring is provided on the side of the knob, and there is resistance between the rubber ring and the shaft body, which can improve the stability of the knob on the shaft body, thereby ensuring the stability after the eccentric journal is adjusted.

[0009] Preferably, the outer side of the knob is flush with the side of the shaft.

[0010] As a further description of the above solution: the outer side of the knob is flush with the side of the shaft body, which can prevent the knob from being easily rotated by external forces, and further ensure the stability of the eccentric journal after adjustment.

[0011] Preferably, the shaft body is provided with a scale on the side of the adjustment port.

[0012] As a further description of the above solution: the shaft body is provided with a scale on the side of the adjustment port, which facilitates precise adjustment of the eccentric shaft.

[0013] Preferably, the eccentric journal and the adjusting block are integrated using a die-casting process.

[0014] As a further description of the above solution: the eccentric journal and the adjusting block are connected by an integrated die-casting process, which can ensure the connection rigidity between the eccentric journal and the adjusting block.

[0015] In summary, compared with the prior art, the beneficial effects of this utility model are: by setting up an eccentric journal, shaft body, connecting shaft, knob, movable port, lead screw, adjusting rod, adjusting port, and adjusting block to adjust the position of the eccentric journal, thereby adjusting the movement stroke of the driven part, significantly improving the applicability of the eccentric shaft. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a side view of the present invention.

[0018] Figure 3 This is a structural diagram of the shaft body and connecting shaft of this utility model;

[0019] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0020] Figure 5 This is a structural diagram of the knob, lead screw, and adjusting rod of this utility model.

[0021] Legend:

[0022] 1. Eccentric journal; 2. Shaft body; 3. Connecting shaft; 4. Knob; 5. Movable port; 6. Lead screw; 7. Adjusting rod; 8. Adjusting port; 9. Adjusting block; 10. Rubber ring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 This utility model provides a technical solution:

[0025] An eccentric shaft includes an eccentric journal 1, a shaft body 2, and a connecting shaft 3. The connecting shaft 3 is fixedly installed in the middle of the shaft body 2. A knob 4 is rotatably provided on the side of the shaft body 2. A movable opening 5 is provided inside the shaft body 2. A lead screw 6 is fixedly installed at the end of the knob 4. The lead screw 6 is located in the movable opening 5. An adjusting rod 7 is horizontally slidably provided on the movable opening 5. The adjusting rod 7 is threadedly connected to the lead screw 6. An adjusting opening 8 is provided on the shaft body 2. The adjusting opening 8 is connected to the movable opening 5. The adjusting rod 7 is movably located in the adjusting opening 8. An adjusting block 9 is horizontally slidably provided on the adjusting opening 8. The end of the adjusting rod 7 is fixedly installed on the side of the adjusting block 9. The eccentric journal 1 is fixedly installed on the top surface of the adjusting block 9.

[0026] The eccentric journal 1, the shaft body 2, and the connecting shaft 3 together constitute the overall structure of the eccentric shaft;

[0027] When the position of the eccentric journal 1 needs to be adjusted, the operator rotates the knob 4 on the side of the shaft body 2 with a tool. The knob 4 drives the lead screw 6 fixed at the end to rotate in the movable opening 5. Since the adjusting rod 7 is threadedly connected to the lead screw 6, the rotation of the lead screw 6 will cause the adjusting rod 7 to slide horizontally in the movable opening 5. The adjusting rod 7 is also fixed to the side of the adjusting block 9, thereby driving the adjusting block 9 to slide horizontally on the adjusting opening 8, and finally realizing the change of the position of the eccentric journal 1 fixedly installed on the top surface of the adjusting block 9.

[0028] This eccentric shaft can adjust the position of the eccentric journal 1, thereby adjusting the travel of the driven component and significantly improving the applicability of the eccentric shaft.

[0029] A rubber ring 10 is provided on the side of the knob 4, and there is resistance between the rubber ring 10 and the shaft 2.

[0030] There is resistance between the rubber ring 10 on the side of the knob 4 and the shaft 2. When the knob 4 is rotated to adjust the position of the eccentric journal 1, this resistance can prevent the knob 4 from rotating freely. Even if the equipment vibrates during operation or is subject to slight external disturbances, the resistance between the rubber ring 10 and the shaft 2 can ensure that the knob 4 is stable on the shaft 2. This ensures that the adjusting rod 7, adjusting block 9 and eccentric journal 1 will not be displaced due to the rotation of the knob 4, maintaining the stable state of the eccentric journal 1 after adjustment and ensuring the stable operation of the equipment.

[0031] The outer side of knob 4 is flush with the side of shaft 2;

[0032] The outer side of the knob 4 is flush with the side of the shaft body 2, so that the knob 4 does not protrude from the surface of the shaft body 2. In this way, during the operation of the equipment, it is difficult for external objects to directly collide with the knob 4, avoiding the knob 4 from rotating due to the force applied by the outside. This prevents the position of the eccentric journal 1 from changing, further ensuring the stability of the eccentric journal 1 after adjustment and improving the reliability of the eccentric shaft operation.

[0033] The shaft 2 is equipped with a scale on the side of the adjustment port 8;

[0034] The shaft body 2 has a scale set on the side of the adjustment port 8. When adjusting the position of the eccentric journal 1, the operator can observe the position of the adjustment block 9 relative to the scale to understand the distance the eccentric journal 1 has moved, thereby achieving precise adjustment of the eccentric shaft.

[0035] The eccentric journal 1 and the adjusting block 9 are integrated by die casting process;

[0036] The eccentric journal 1 and the adjusting block 9 are integrated through die casting. During the die casting process, the two will form an inseparable whole structure. Even when subjected to large loads and torques, the eccentric journal 1 and the adjusting block 9 formed by integrated die casting can jointly bear the force and will not loosen or deform due to insufficient strength of the connection part, thus ensuring that the eccentric shaft works stably and reliably.

[0037] Working principle:

[0038] The eccentric journal 1, the shaft body 2, and the connecting shaft 3 together constitute the overall structure of the eccentric shaft;

[0039] When the position of the eccentric journal 1 needs to be adjusted, the operator rotates the knob 4 on the side of the shaft body 2 with a tool. The knob 4 drives the lead screw 6 fixed at the end to rotate in the movable opening 5. Since the adjusting rod 7 is threadedly connected to the lead screw 6, the rotation of the lead screw 6 will cause the adjusting rod 7 to slide horizontally in the movable opening 5. The adjusting rod 7 is also fixed to the side of the adjusting block 9, thereby driving the adjusting block 9 to slide horizontally on the adjusting opening 8, and finally realizing the change of the position of the eccentric journal 1 fixedly installed on the top surface of the adjusting block 9.

[0040] This eccentric shaft can adjust the position of the eccentric journal 1, thereby adjusting the travel of the driven component and significantly improving the applicability of the eccentric shaft;

[0041] in,

[0042] There is resistance between the rubber ring 10 on the side of the knob 4 and the shaft body 2. When the knob 4 is rotated to adjust the position of the eccentric journal 1, this resistance can prevent the knob 4 from rotating freely. Even if the equipment vibrates during operation or is subjected to slight external disturbances, the resistance between the rubber ring 10 and the shaft body 2 can ensure that the knob 4 is stable on the shaft body 2. This ensures that the adjusting rod 7, adjusting block 9 and eccentric journal 1 will not be displaced due to the rotation of the knob 4, maintaining the stable state of the eccentric journal 1 after adjustment and ensuring stable operation of the equipment.

[0043] The outer side of the knob 4 is flush with the side of the shaft body 2, so that the knob 4 does not protrude from the surface of the shaft body 2. In this way, during the operation of the equipment, it is difficult for external objects to directly collide with the knob 4, avoiding the knob 4 from rotating due to the force applied by the outside, thereby preventing the position of the eccentric journal 1 from changing, further ensuring the stability of the eccentric journal 1 after adjustment, and improving the reliability of the eccentric shaft operation.

[0044] The shaft body 2 has a scale set on the side of the adjustment port 8. When adjusting the position of the eccentric journal 1, the operator can observe the position of the adjustment block 9 relative to the scale to understand the distance the eccentric journal 1 has moved, thereby achieving precise adjustment of the eccentric shaft.

[0045] The eccentric journal 1 and the adjusting block 9 are integrated through die casting. During the die casting process, the two will form an inseparable whole structure. Even when subjected to large loads and torques, the eccentric journal 1 and the adjusting block 9 formed by integrated die casting can jointly bear the force and will not loosen or deform due to insufficient strength of the connection part, thus ensuring that the eccentric shaft works stably and reliably.

[0046] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An eccentric shaft, comprising an eccentric journal (1), a shaft body (2), and a connecting shaft (3), characterized in that, The connecting shaft (3) is fixedly installed in the middle of the shaft body (2). A knob (4) is rotatably provided on the side of the shaft body (2). A movable opening (5) is provided inside the shaft body (2). A lead screw (6) is fixedly installed at the end of the knob (4). The lead screw (6) is located in the movable opening (5). An adjusting rod (7) is horizontally slidably provided on the movable opening (5). The adjusting rod (7) is threadedly connected to the lead screw (6). An adjusting opening (8) is provided on the shaft body (2). The adjusting opening (8) is connected to the movable opening (5). The adjusting rod (7) is movably located in the adjusting opening (8). An adjusting block (9) is horizontally slidably provided on the adjusting opening (8). The end of the adjusting rod (7) is fixedly installed on the side of the adjusting block (9). The eccentric journal (1) is fixedly installed on the top surface of the adjusting block (9).

2. An eccentric shaft according to claim 1, characterized in that, A rubber ring (10) is provided on the side of the knob (4), and there is resistance between the rubber ring (10) and the shaft (2).

3. An eccentric shaft according to claim 1, characterized in that, The outer side of the knob (4) is flush with the side of the shaft (2).

4. An eccentric shaft according to claim 1, characterized in that, The shaft (2) is provided with a scale on the side of the adjustment port (8).

5. An eccentric shaft according to claim 1, characterized in that, The eccentric journal (1) and the adjusting block (9) are integrated by die casting process.

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