Pull rod of thickener rake frame

Abstract

The utility model discloses a thickener harrow frame pull rod which comprises a rod a, a rod b and a fine adjustment connector, and the ends, close to each other, of the rod a and the rod b are connected through the fine adjustment connector; the end, close to the fine adjustment connector, of the rod a is provided with an external thread section a. The end, close to the fine adjustment connector, of the rod b is provided with an external thread section b. Adjusting resistance in the fine adjustment process of the total length of the pull rod can be reduced, and meanwhile thread fatigue damage of internal threads of the internal thread body a and the internal thread body b in the adjusting process can be avoided.

Description

Technical Field

[0001] This utility model belongs to the field of rake frame tie rod. Background Technology

[0002] The thickener rake arm needs to remain stable under the upward traction of the tie rod. The tie rod needs to be equipped with a length adjustment structure for fine-tuning the total length of the tie rod, so as to tighten the tie rod and generate a pre-tension force, thereby tightening the thickener rake arm upward at an angle and preventing the root stress of the thickener rake arm from being too large and breaking. The connection of the length adjustment structure is generally a threaded connection. When the axial relative force at the threaded connection is too large, the torsional resistance of the thread will also increase, making the adjustment process difficult. At the same time, excessive axial force at the threaded connection may also damage the threaded connection. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a thickening machine rake frame tie rod, which can reduce the adjustment resistance during the fine adjustment process of the total length of the tie rod, and at the same time avoid fatigue damage of the internal threads of the a internal thread body and the b internal thread body during the adjustment process.

[0004] Technical solution: To achieve the above objectives, the present invention provides a thickening machine rake frame tie rod, including rod a, rod b, and a fine-tuning connector. The ends of rod a and rod b that are close to each other are connected by the fine-tuning connector. Rod a is provided with an external thread section a, and rod b is provided with an external thread section b, at the end of rod a that is close to the fine-tuning connector.

[0005] The fine-tuning connector includes an internal thread body (a) and an internal thread body (b) with coaxial spacing, which are fixedly connected by a connecting strip. The internal threads of the external thread section (a) and the external thread section (b) have opposite directions, and the external thread section (a) and the external thread section (b) are threadedly engaged with the internal thread body (a) and the internal thread body (b) respectively. The ends of the external thread section (a) and the external thread section (b) are threadedly engaged with a pre-tension nut (a) and a pre-tension nut (b), respectively, which are connected by a coaxial pre-tension spring.

[0006] Furthermore, an assist plate is fixedly installed in the middle of the connecting strip, and the assist plate has hollowed-out assist holes.

[0007] Furthermore, the axis of the assist hole is perpendicular to rods a and b, and one end of the assist rod can be inserted into the assist hole.

[0008] Furthermore, the ends of rods a and b that are far apart from each other are respectively the a-ear plate connector and the b-ear plate connector.

[0009] Furthermore, the two connecting strips are parallel to the two sides of the external thread section a and the external thread section b, and the two ends of each connecting strip are integrally connected to one side of the external thread section a and the external thread section b, respectively, and the auxiliary plate is integrally connected to the middle of the two connecting strips.

[0010] Furthermore, the external thread segment of the internal thread body a, on the side away from the internal thread body b, is threaded with a lock nut a, and the external thread segment of the internal thread body b, on the side away from the internal thread body a, is threaded with a lock nut b.

[0011] Beneficial effects: In this device of the present invention, the adjustable pretension spring can effectively suppress the magnitude of F2 and F3, thereby reducing the axial force on the internal thread body a and internal thread body b. This allows the internal thread body a and internal thread body b to be turned more smoothly under the action of the assist rod, thereby reducing the resistance in the fine adjustment process of the total length of the pull rod and making the adjustment of the total length of the pull rod smoother. At the same time, the pretension spring shares part of the axial force on the internal threads of the internal thread body a and internal thread body b, thereby effectively avoiding fatigue damage to the threads of the internal thread body a and internal thread body b during the adjustment process. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the tie rod;

[0013] Figure 2 for Figure 1 A schematic diagram of the fine-tuning connector structure;

[0014] Figure 3 for Figure 2 The A-direction view in this figure omits the pre-tensioned spring.

[0015] Figure 4 for Figure 3 The structural diagram of the pre-tension spring has been added to the existing structure. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] As attached Figures 1 to 4 The image shows a rake frame tie rod, such as Figure 1As shown, the tie rod 31 includes a rod 4, a rod 5, and a fine-tuning connector 3. The ends of rod 4 and rod 5 that are close to each other are connected by the fine-tuning connector 3. The ends of rod 4 and rod 5 that are far from each other are a-ear plate connector 1 and b-ear plate connector 2, respectively. A-ear plate connector 1 and b-ear plate connector 2 are used to connect the thickener rake arm and the upper part of the thickener torque tube, respectively. The thickener rake arm remains stable under the upward slant of the tie rod 31. The fine-tuning connector 3 is used to fine-tune the total length of the tie rod, thereby tightening the tie rod 31 and adjusting the tie rod 31 to form a pre-tension, thereby tightening the thickener rake arm upward slant and avoiding excessive stress at the root of the thickener rake arm, which could cause it to break.

[0018] like Figure 2 and 3 As shown, rod 4 has an external thread section 4a at one end near the fine-tuning connector 3, and rod 5 has an external thread section 5a at one end near the fine-tuning connector 3. The fine-tuning connector 3 includes an internal thread body 14 and an internal thread body 15 with a coaxial center spacing. The internal thread body 14 and the internal thread body 15 are fixedly connected by a connecting strip 11. The internal threads of external thread section 4a and external thread section 5a have opposite directions, and external thread section 4a and external thread section 5a are threadedly engaged with internal thread body 14 and internal thread body 15, respectively. An assist plate 13 is fixedly provided in the middle of the connecting strip 11. An assist hole 12 is hollowed out on the assist plate 13. The axis of the assist hole 12 is perpendicular to rod 4 and rod 5, and one end of the assist rod 23 can be inserted into the assist hole 12.

[0019] like Figure 3 As shown, two connecting strips 11 are parallel to the two sides of external thread section a 4a and external thread section b 5a, and the two ends of each connecting strip 11 are integrally connected to one side of external thread section 4a and external thread section b 5a, respectively. The auxiliary plate 13 is integrally connected to the middle of the two connecting strips 11.

[0020] The external thread segment 4a of the internal thread body 14, located away from the internal thread body 15, is threaded with a lock nut 9. The external thread segment 5a of the internal thread body 15, located away from the internal thread body 14, is threaded with a lock nut 10.

[0021] like Figure 3 As shown, the ends of external thread section a 4a and external thread section b 5a are respectively threaded with pre-tension nut a 7 and pre-tension nut b 8. Pre-tension nut a 7 and pre-tension nut b 8 are connected by a pre-tension spring 6 on the same axis.

[0022] Working principle:

[0023] The overall length adjustment process of the pull rod 31 in working condition:

[0024] When the pull rod 31 is working, it is in a state of tension along the axial direction. First, loosen the anti-loosening nut 9 and the anti-loosening nut 10. Then, hold one end of the assist rod 23 and insert it into the assist hole 12. Then, forcefully turn the assist rod 23, so that the fine-tuning connector 3 rotates in the forward or reverse direction along the axial direction. This causes the internal thread body 14 and the internal thread body 15 to rotate synchronously relative to the rod 4 and the rod 5 in the forward or reverse direction along the axial direction. Under the thread transmission, the rod 4 and the rod 5 make fine-tuning movements that bring them closer or further apart, thereby achieving the purpose of fine-tuning the total length of the pull rod 31.

[0025] Because the tie rod 31 is taut as a whole during operation, forming a preload F, the tension of the preload spring 6 at this time is denoted as F1, the axial force between the internal thread body 14 and the external thread segment 4a is denoted as F2, and the axial force between the internal thread body 15 and the external thread segment 5a is denoted as F3. From mechanical analysis, we know that F2 = F3 = F - F1; In this device, F1 can be pre-adjusted at the factory by synchronously rotating the pre-tension nut 7 and the pre-tension nut 8. Therefore, the adjustable pre-tension spring 6 can effectively suppress the magnitude of F2 and F3, thereby reducing the axial force of the internal thread body 14 and the internal thread body 15, so that the internal thread body 14 and the internal thread body 15 can be turned more smoothly under the action of the assist rod 23, thereby reducing the resistance in the fine adjustment process of the total length of the pull rod 31, making the total length of the pull rod 31 more smoothly adjusted. At the same time, the pre-tension spring 6 shares part of the axial force of the internal threads of the internal threads of the internal thread body 14 and the internal thread body 15, thereby effectively avoiding the fatigue damage of the threads of the internal threads of the internal thread body 14 and the internal thread body 15 during the adjustment process.

[0026] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A thickener rake frame tie rod, characterized in that: It includes rod a (4), rod b (5) and fine-tuning connector (3). The ends of rod a (4) and rod b (5) that are close to each other are connected by fine-tuning connector (3). The end of rod a (4) that is close to fine-tuning connector (3) is provided with an external thread section a (4a), and the end of rod b (5) that is close to fine-tuning connector (3) is provided with an external thread section b (5a). The fine-tuning connector (3) includes an a-internal thread body (14) and a b-internal thread body (15) with a coaxial center spacing. The a-internal thread body (14) and the b-internal thread body (15) are fixedly connected by a connecting strip (11). The internal threads of the a-external thread segment (4a) and the b-external thread segment (5a) have opposite directions of rotation, and the a-external thread segment (4a) and the b-external thread segment (5a) are threadedly engaged with the a-internal thread body (14) and the b-external thread body (15) respectively. The ends of the a-external thread segment (4a) and the b-external thread segment (5a) are threadedly engaged with the a-pretension nut (7) and the b-pretension nut (8) respectively. The a-pretension nut (7) and the b-pretension nut (8) are connected by a coaxial pretension spring (6).

2. The thickener rake frame tie rod according to claim 1, characterized in that: A booster plate (13) is fixedly provided in the middle of the connecting strip (11), and the booster plate (13) has a hollowed-out booster hole (12).

3. A thickener rake frame tie rod according to claim 2, characterized in that: The axis of the assist hole (12) is perpendicular to rod a (4) and rod b (5), and one end of the assist rod (23) can be inserted into the assist hole (12).

4. A thickener rake frame tie rod according to claim 3, characterized in that: The ends of rod a (4) and rod b (5) that are far apart from each other are respectively ear plate connector (1) and ear plate connector (2).

5. A thickener rake frame tie rod according to claim 4, characterized in that: Two connecting strips (11) are parallel to the two sides of the external thread section (4a) and the external thread section (5a), and the two ends of each connecting strip (11) are integrally connected to one side of the external thread section (4a) and the external thread section (5a), respectively. The auxiliary plate (13) is integrally connected to the middle of the two connecting strips (11).

6. A thickener rake frame tie rod according to claim 5, characterized in that: The external thread segment (4a) of the internal thread body (14) on the side away from the internal thread body (15) is threaded with a lock nut (9), and the external thread segment (5a) of the internal thread body (15) on the side away from the internal thread body (14) is threaded with a lock nut (10).

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