A special shaft head for a tension leveler of a galvanizing unit

Abstract

The utility model relates to a special shaft head of zinc plating unit drawing and straightening machine. It comprises telescopic shaft, shaft sleeve, two groups of deep groove ball bearings, baffle ring and gasket. The shaft sleeve is internally provided with shaft sleeve inner clamping groove and first shoulder, and the shaft sleeve inner clamping groove is internally provided with inner clamping spring. The telescopic shaft comprises large diameter section and small diameter section. Two groups of deep groove ball bearing sleeves are arranged on the small diameter section of telescopic shaft, and the baffle ring is sleeved on the small diameter section of telescopic shaft and located between two groups of deep groove ball bearings. The gasket is installed in the shaft sleeve. The improvement lies in that it further comprises angular contact ball bearing, spring and arc-shaped seat. The angular contact ball bearing is located in the shaft sleeve and sleeved on the large diameter section of telescopic shaft. The shaft sleeve is further provided with second shoulder. One side of the angular contact ball bearing is in contact with the inner clamping spring, and the other side is in contact with the second shoulder. The arc-shaped seat is installed in the shaft sleeve, and the spring is located between the gasket and the arc-shaped seat. The utility model can improve the ability of shaft head to resist radial force and axial force, and solve the technical problem of shaft head burning.

Description

Technical Field

[0001] This utility model relates to the technical field of hot-dip galvanizing equipment, specifically a special shaft head for a galvanizing unit straightening machine. Background Technology

[0002] In metallurgical enterprises, hot-dip galvanizing production lines of China Aluminum Zinc Aluminum Magnesium are generally equipped with a strip straightening machine after the finishing machine to further improve the strip shape and processing performance. This strip straightening machine of the galvanizing unit is mainly composed of front and rear tension rollers that perform the stretching function, bending roller group that performs the bending function, and straightening roller system that performs the straightening function. Its main functions are: first, to improve the strip shape. By stretching and bending the strip, it can partially eliminate the wavy shape such as edge waves, center waves, C-shaped bends, and L-shaped bends, thereby improving the straightness of the strip; second, to improve the processing performance. Through the stretching and bending action, similar to finishing, the strip will reduce or eliminate the yield plateau during subsequent deformation, thereby producing uniform deformation and improving the processing performance.

[0003] The existing shaft heads of the galvanizing unit tension leveling machine are as follows: Figure 5 As shown, it consists of five parts: telescopic shaft 1, bushing 7, two sets of deep groove ball bearings 9, retaining ring 3, and gasket 4. Figure 6 As shown, the bushing 7 has an inner bushing groove 7a and a first shoulder 7c. Figure 5 The display shows that an inner retaining spring 2 is installed in the inner groove 7a of the bushing. Figure 4 As shown, the telescopic shaft 1 includes a large-diameter section 1a and a small-diameter section 1b. Figure 5 The diagram shows that two sets of deep groove ball bearings 9 are fitted onto the small diameter section 1b of the telescopic shaft and located inside the bushing 7. The retaining ring 3 is fitted onto the small diameter section 1b of the telescopic shaft and located between the two sets of deep groove ball bearings 9. The shim 4 is installed inside the bushing 7. One side of the shim 4 contacts the first shoulder 7c of the bushing 7, and the other side contacts the outer ring of the deep groove ball bearing 9 away from the large diameter section 1a of the telescopic shaft. The outer ring of the deep groove ball bearing 9 close to the large diameter section 1a of the telescopic shaft contacts the inner retaining spring 2 to achieve axial positioning of the two sets of deep groove ball bearings 9. Figure 4 The display shows that the front end of the small-diameter section 1b of the telescopic shaft has a telescopic shaft slot 1c. Figure 5The diagram shows that an external retaining circumferential spring 8 is installed in slot 1c to prevent significant axial movement of the inner ring of the deep groove ball bearing 9, which is located far from the large-diameter section 1a of the telescopic shaft. During high-load operation of the straightening machine, the shaft head rotates circumferentially. Due to poor strip profiles, especially in hot-rolled high-strength thick plates with edge waviness, the shaft head is subjected to both axial and radial forces. Large axial loads often cause the inner and outer rings of the deep groove ball bearing 9 to separate, while large radial loads often cause the telescopic shaft 1 to bend and deform. When the bearing 9 is damaged or the telescopic shaft 1 bends, the shaft head will abnormally heat up and turn red. If this is not detected in time during inspection, it will lead to shaft head jamming, which in turn will cause abnormal rotation of the work rolls and intermediate rolls, scratching the strip surface and producing irreparable downgraded products. Therefore, how to reasonably arrange the shaft head to increase its resistance to radial and axial forces is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this utility model is to provide a special shaft head for a galvanizing unit straightening machine. By improving the shaft sleeve structure and adding angular contact ball bearings, springs and arc-shaped seats, the ability of the shaft head to resist radial and axial forces is improved, thus solving the technical problem of shaft head burn-out.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A special shaft head for a galvanizing unit straightening machine includes a telescopic shaft, a bushing, two sets of deep groove ball bearings, a retaining ring, and a washer. The bushing has an inner groove and a first shoulder; an inner retaining spring is installed in the inner groove. The telescopic shaft includes a large-diameter section and a small-diameter section. The two sets of deep groove ball bearings are sleeved on the small-diameter section of the telescopic shaft, and the retaining ring is sleeved on the small-diameter section of the telescopic shaft and located between the two sets of deep groove ball bearings. The washer is installed inside the bushing. The improvement lies in that it also includes an angular contact ball bearing, a spring, and an arc-shaped seat. The angular contact ball bearing is located inside the bushing and sleeved on the large-diameter section of the telescopic shaft. A second shoulder is also provided inside the bushing; one side of the angular contact ball bearing contacts the inner retaining spring, and the other side contacts the second shoulder. The arc-shaped seat is installed inside the bushing, and the spring is located between the washer and the arc-shaped seat.

[0007] The aforementioned galvanizing unit straightening machine special shaft head, wherein the arc-shaped seat is clamped at the first shoulder of the bushing, one side of the gasket contacts the outer ring of the deep groove ball bearing away from the large diameter section of the telescopic shaft, and the other side contacts the spring.

[0008] The aforementioned special shaft head for a galvanizing unit straightening machine has a second shoulder located between the inner groove and the first shoulder of the bushing. One side of the angular contact ball bearing contacts the inner retaining spring, and the outer ring of the other side is secured to the second shoulder of the bushing.

[0009] In the aforementioned special shaft head for a galvanizing unit straightening machine, the outer ring of the deep groove ball bearing near the large diameter section of the telescopic shaft contacts the inner ring of the angular contact ball bearing.

[0010] The aforementioned type of shaft head for a galvanizing unit straightening machine has an arc-shaped seat whose flat side is engaged with the first shoulder of the bushing, and whose concave side contacts the spring.

[0011] The aforementioned special shaft head for a galvanizing unit straightening machine has a telescopic shaft slot at the front end of the small-diameter section of the telescopic shaft, where an external retaining spring is installed.

[0012] The beneficial effects of this utility model are as follows:

[0013] This invention features a second shoulder within the bushing. By using two sets of deep groove ball bearings fitted on the small-diameter section of the telescopic shaft and an angular contact ball bearing fitted on the large-diameter section of the telescopic shaft, the radial bearing capacity of the shaft head is effectively improved. The angular contact ball bearings are secured at the second shoulder of the bushing to prevent axial movement. By adding a hard compression spring inside the bushing, the axial bearing capacity of the shaft head is effectively improved, preventing abnormal rotation of the work roll and intermediate roll due to shaft head burn-out, which could lead to scratches on the strip surface. This invention solves the technical problem in the prior art where the internal bearings of the shaft head are insufficient to resist radial and axial forces, causing shaft head burn-out. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the arc-shaped seat structure;

[0017] Figure 3 This is a schematic diagram of the bushing structure;

[0018] Figure 4 This is a schematic diagram of the telescopic shaft structure;

[0019] Figure 5 A schematic diagram of the existing tension leveling machine shaft head structure;

[0020] Figure 6 This is a schematic diagram of the internal structure of an existing bushing.

[0021] The labels in the figure are as follows: 1. Telescopic shaft, 1a. Telescopic shaft large diameter section, 1b. Telescopic shaft small diameter section, 2. Inner retaining ring, 3. Retaining ring, 4. Washer, 5. Spring, 6. Arc-shaped seat, 7. Bushing, 7a. Bushing inner groove, 7c. First shoulder, 7b. Second shoulder, 8. Outer retaining ring, 9. Deep groove ball bearing, 10. Angular contact ball bearing. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Figure 1 The present invention relates to a special shaft head for a galvanizing unit straightening machine, comprising a telescopic shaft 1, a bushing 7, two sets of deep groove ball bearings 9 and one set of angular contact ball bearings 10; Figure 4 As shown, the telescopic shaft 1 includes a large-diameter section 1a and a small-diameter section 1b, and the front end of the small-diameter section 1b is provided with a circumferential outer groove 1c. Figure 3 As shown, a circumferential inner groove 7a, a second shoulder 7b, and a first shoulder 7c are sequentially formed inside the bushing 7 along the length direction;

[0024] Figure 1 The telescopic shaft 1, with its small diameter section 1b inserted into the bushing 7 along the left opening side, has an inner retaining spring 2 installed in the inner groove 7a. An angular contact ball bearing 10 is located inside the bushing 7 and fitted onto the large diameter section 1a of the telescopic shaft 1 to increase the radial resistance of the shaft head. The left side of the angular contact ball bearing 10 contacts the inner retaining spring 2, and the right side abuts against the second shoulder 7b of the bushing 7, achieving axial positioning of the angular contact ball bearing 10. Two sets of deep groove ball bearings 9 are fitted onto the small diameter section 1b of the telescopic shaft 1, and a retaining ring 3 is fitted onto the small diameter section 1b of the telescopic shaft 1 and located between the two sets of deep groove ball bearings 9. The outer ring of the first set of deep groove ball bearings 9 contacts the inner ring of the angular contact ball bearing 10, achieving axial positioning of the set of deep groove ball bearings 9. A shim 4 is installed inside the bushing 7, and the right side of the second set of deep groove ball bearings 8 contacts the left side of the shim 4, while the right side of the shim 4 abuts against the left end of the compression spring 5. Figure 2 As shown, the arc-shaped seat 6 consists of a flat side and a concave side. The flat side is engaged at the first shoulder 7c of the bushing 7, and the concave side contacts the right end of the compression spring 5 to increase the axial resistance of the shaft head. The compression spring 5 is located between the washer 4 and the arc-shaped seat 6 to achieve the installation, fixation and axial positioning of the spring 5.

[0025] This utility model effectively improves the axial and radial bearing capacity by using two sets of deep groove ball bearings 9 sleeved on the small diameter section 1b of the telescopic shaft, an angular contact ball bearing 10 sleeved on the large diameter section 1a of the telescopic shaft, and a spring 5 located in the bushing 7. This avoids the situation of shaft head burn-out and solves the technical problem of insufficient resistance to radial and axial forces by the internal bearings of the shaft head in the prior art, which causes shaft head burn-out.

Claims

1. A special shaft head for a galvanizing unit straightening machine, comprising a telescopic shaft (1), a bushing (7), two sets of deep groove ball bearings (9), a retaining ring (3), and a washer (4); the bushing (7) has an inner groove (7a) and a first shoulder (7c), and an inner retaining spring (2) is installed in the inner groove (7a); the telescopic shaft (1) comprises a large-diameter section (1a) and a small-diameter section (1b); the two sets of deep groove ball bearings (9) are sleeved on the small-diameter section (1b) of the telescopic shaft, and the retaining ring (3) is sleeved on the small-diameter section (1b) of the telescopic shaft and located between the two sets of deep groove ball bearings (9); the washer (4) is installed inside the bushing (7); characterized in that: It also includes an angular contact ball bearing (10), a spring (5) and an arc-shaped seat (6). The angular contact ball bearing (10) is located inside the bushing (7) and is fitted onto the large diameter section (1a) of the telescopic shaft. A second shoulder (7b) is also provided inside the bushing (7). One side of the angular contact ball bearing (10) contacts the inner retaining spring (2), and the other side contacts the second shoulder (7b) of the bushing. The arc-shaped seat (6) is installed inside the bushing (7), and the spring (5) is located between the washer (4) and the arc-shaped seat (6).

2. A special shaft head for a withdrawal and straightening machine of a galvanizing line as claimed in claim 1, characterized in that: The arc-shaped seat (6) is engaged at the first shoulder (7c) of the bushing. One side of the gasket (4) contacts the outer ring of the deep groove ball bearing (9) which is far from the large diameter section (1a) of the telescopic shaft, and the other side contacts the spring (5).

3. A special shaft head for a withdrawal and straightening machine of a galvanizing line as claimed in claim 1, characterized in that: The second shoulder (7b) opened in the bushing (7) is located between the inner groove (7a) and the first shoulder (7c) of the bushing. One side of the angular contact ball bearing (10) is in contact with the inner retaining spring (2), and the outer ring of the other side is locked at the second shoulder (7b) of the bushing (7).

4. A special shaft head for a withdrawal and straightening machine of a galvanizing line as set forth in claim 1, characterized in that: The outer ring of the deep groove ball bearing (9) near the large diameter section (1a) of the telescopic shaft contacts the inner ring of the angular contact ball bearing (10).

5. A special shaft head for a withdrawal and straightening machine of a galvanizing line as set forth in claim 1, characterized in that: The arc-shaped seat (6) is mounted on one side of the plane at the first shoulder (7c) of the bushing, and the concave side is in contact with the spring (5).

6. A special shaft head for a withdrawal and straightening machine of a galvanizing line as set forth in claim 1, characterized in that: The front end of the small-diameter section (1b) of the telescopic shaft has a telescopic shaft groove (1c). Install an external retaining ring (8) in the middle.

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