A grinding block anti-loosening screw assembly

Abstract

This utility model discloses a grinding block anti-loosening screw assembly, including a grinding block anti-loosening screw, a first anti-loosening sleeve, a grinding block, a second anti-loosening sleeve, and a grinding block bracket. The grinding block has a mounting ear with a first through hole. The screw passes sequentially through the second through hole of the first anti-loosening sleeve, the first through hole of the mounting ear, and the third through hole of the second anti-loosening sleeve before connecting to the threaded hole of the grinding block bracket. The first anti-loosening sleeve fits against the front side of the mounting ear, and the second anti-loosening sleeve is clamped between the rear side of the mounting ear and the contact surface of the bracket, forming a bidirectional clamping. The grinding block bracket has a limiting arm, whose arm and limiting stop respectively abut against the left and front sides of the first anti-loosening sleeve, forming a three-dimensional limiting. The two anti-loosening sleeves are made of elastic material, and together with the screw structure, they achieve dual anti-loosening through elastic friction and mechanical limiting, resisting strong vibrations and impacts, ensuring the grinding block is securely installed, and preventing it from loosening and falling off.

Description

Technical Field

[0001] This utility model relates to the field of fastener anti-loosening technology, specifically to a grinding block anti-loosening screw assembly. Background Technology

[0002] In the hot-rolled strip steel production process, the surface condition of the pinch rolls of the coiler directly affects the coiling quality of the strip steel. To ensure the surface accuracy of the pinch rolls, an online grinding device is usually used for real-time grinding and maintenance. As the core component of this device that directly contacts the pinch rolls, the stable installation of the grinding block is crucial to ensuring the grinding effect. The grinding block needs to be firmly fixed to the bracket by connectors to withstand the impact and vibration generated during the grinding process. However, in long-term, high-frequency grinding operations, the connectors are prone to loosening due to vibration, which can affect the grinding accuracy and even cause the grinding block to fall off, leading to equipment failure. Therefore, preventing the grinding block from loosening and fixing it has become an urgent technical problem to be solved in this field.

[0003] Currently, the industry primarily uses conventional screw connections to fix grinding blocks, directly connecting the mounting ears of the grinding block to the threaded holes on the bracket using ordinary bolts or screws. To prevent screw loosening, spring washers are often used in related technologies. The washers increase the friction between the threads by generating axial force through their own elastic deformation, thus preventing loosening. However, in the production environment of hot-rolled strip steel, grinding devices are continuously subjected to strong vibrations and impacts. Under long-term alternating stress, the spring washers are prone to plastic deformation, causing the anti-loosening effect to gradually fail. This directly leads to insufficient reliability of the grinding block fixation, and may even result in the grinding block falling off and causing mechanical accidents.

[0004] Therefore, the above problems urgently need to be solved. Utility Model Content

[0005] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide a grinding block anti-loosening screw assembly. By setting a first anti-loosening sleeve and a second anti-loosening sleeve to work in conjunction with the limiting clamping arm, axial and radial limiting and elastic clamping are achieved, which effectively resists the strong vibration and impact during the operation of the online grinding device of the hot-rolled strip steel coiler, prevents the grinding block anti-loosening screw from loosening, and ensures that the grinding block is installed firmly and reliably.

[0006] Technical Solution: This utility model provides a grinding block anti-loosening screw assembly, including a grinding block anti-loosening screw, a first anti-loosening sleeve, a grinding block, a second anti-loosening sleeve, and a grinding block bracket. The grinding block includes a grinding body and a mounting ear. The mounting ear is fixed to the upper end of the grinding body and has a first through hole. The grinding block anti-loosening screw passes sequentially from front to back through the second through hole on the first anti-loosening sleeve, the first through hole on the mounting ear, and the third through hole on the second anti-loosening sleeve, and is threadedly connected to a threaded hole on the contact surface of the grinding block bracket. The rear side of the first anti-loosening sleeve fits against the front side of the mounting ear, and the second anti-loosening sleeve is clamped between the rear side of the mounting ear and the contact surface. The first anti-loosening sleeve fitting against the front side of the mounting ear and the second anti-loosening sleeve clamped between the rear side of the mounting ear and the contact surface form a two-way clamping of the mounting ear. By tightly fitting the ferrule with the mounting ear and the contact surface, the axial movement of the mounting ear is restricted by the friction of the contact surface. At the same time, the pre-tightening force of the screw thread connection is used. Its core principle is the double effective anti-loosening effect of the elastic friction cooperation between the first and second anti-loosening ferrules and the anti-loosening screw of the grinding block, as well as the anti-loosening friction force maintained by the mechanical axial limit.

[0007] Furthermore, in a grinding block anti-loosening screw assembly of this application, a limiting clamping arm is fixed to the left side of the grinding block bracket. The limiting clamping arm extends to a contact surface and includes an arm body and a limiting stop. The limiting stop is located at the end of the arm body extending forward to the contact surface. The arm body is perpendicular to the contact surface. The front side of the first anti-loosening sleeve abuts against the limiting stop, and the left side of the first anti-loosening sleeve abuts against the arm body. The arm body of the limiting clamping arm is perpendicular to the contact surface and abuts against the left side of the first anti-loosening sleeve, forming a lateral (left-right direction) constraint. The limiting stop is located at the front end of the arm body and abuts against the front side of the first anti-loosening sleeve, supplementing the axial (front-back direction) constraint. Combined with the original double anti-loosening sleeve clamping of the mounting ear, a three-dimensional limiting system of "lateral + axial + radial (screw through hole positioning)" is constructed, comprehensively restricting the displacement freedom of the first anti-loosening sleeve and the mounting ear.

[0008] Furthermore, in a grinding block anti-loosening screw assembly of this application, both the first and second anti-loosening sleeves are made of elastic material. Under the preload of the screw, the first and second anti-loosening sleeves, made of elastic material, can undergo slight elastic deformation, automatically filling the minute gaps between the mounting lug and the first and second anti-loosening sleeves, as well as between the first and second anti-loosening sleeves and the contact surface, thus enhancing the tightness of the connection between the components. When high-frequency vibrations and instantaneous impacts during grinding operations are transmitted through the sleeves, the elastic material can convert mechanical energy into internal energy through its own deformation, acting as a "shock absorber." The first anti-loosening sleeve absorbs the vibration energy in front of the mounting lug, while the second anti-loosening sleeve buffers the impact between the rear of the mounting lug and the contact surface, reducing fatigue damage to the screw thread connection caused by vibration.

[0009] Furthermore, this application discloses a grinding block anti-loosening screw assembly, wherein the grinding block anti-loosening screw includes a nut, a first screw body, and a second screw body. The diameter of the first screw body is larger than the diameter of the second screw body. The second screw body has an external thread, and the threaded hole has an internal thread. The diameter of the second screw body is adapted to the diameter of the threaded hole. Since the diameter of the first screw body is larger than the diameter of the second screw body, when the screw passes through the through holes, the first screw body can be adapted to the second through hole of the first anti-loosening sleeve, the first through hole of the mounting ear, and the third through hole of the second anti-loosening sleeve, forming radial positioning and limiting the screw's movement within the through holes. The diameter of the second screw body is adapted to the threaded hole, and its external thread engages with the internal thread within the threaded hole, achieving a secure connection between the screw and the grinding block bracket.

[0010] Furthermore, in a grinding block anti-loosening screw assembly of this application, the diameter of the first screw body is larger than the diameters of the second and third through holes. Since the anti-loosening sleeve is made of elastic material, when the screw is screwed in, the first screw body exerts radial pressure on the elastic sleeve passing through the through hole. The first anti-loosening sleeve is clamped and compressed by the first screw body and the front side of the mounting lug, while the second anti-loosening sleeve is clamped and compressed by the first screw body and the rear side of the mounting lug and the contact surface. Under compression, the elastic material undergoes controllable deformation, tightly filling the gap between the first screw body and the inner wall of the through hole, while simultaneously applying radial rebound force to the mounting lug and the contact surface, forming an interference fit between the screw, sleeve, and mounting lug.

[0011] Furthermore, in one grinding block anti-loosening screw assembly of this application, the first anti-loosening sleeve is in the shape of a cuboid block, with a first annular protrusion on the rear side. The inner diameter of the first annular protrusion is the same as the diameter of the second through hole, and the outer diameter of the first annular protrusion is adapted to the diameter of the first through hole. During assembly, the first annular protrusion is embedded in the first through hole. This fitting structure can form a precise radial positioning between the first anti-loosening sleeve and the mounting ear.

[0012] Furthermore, in a grinding block anti-loosening screw assembly of this application, the second anti-loosening sleeve is annular, with a second annular protrusion on its front side. The inner diameter of the second annular protrusion is the same as the diameter of the third through hole, and the outer diameter of the second annular protrusion is adapted to the diameter of the first through hole. During assembly, the second annular protrusion is embedded in the first through hole. The outer diameter of the second annular protrusion is adapted to the diameter of the first through hole, and during assembly, it is embedded in the first through hole, while its inner diameter is the same as the diameter of the third through hole, thus not affecting the screw's passage. After the protrusion is embedded in the first through hole, it works together with the first annular protrusion of the first anti-loosening sleeve from both the front and rear sides of the mounting ear to form a bidirectional fitting and positioning of the mounting ear, further restricting the radial and circumferential displacement of the mounting ear and enhancing the connection stability between the mounting ear and the anti-loosening sleeve.

[0013] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0014] 1. The anti-loosening screw assembly for grinding blocks described in this utility model forms a two-way clamping effect on the mounting ear through the first and second anti-loosening sleeves. Combined with the properties of the elastic material, a tight fit is generated under the action of pre-tightening force. The friction force of the contact surface restricts the axial movement of the mounting ear. At the same time, the elastic material can absorb vibration energy and reduce the impact on the screw thread connection. Combined with the radial positioning of the first screw body and each through hole, dual axial and radial limiting is achieved, effectively resisting loosening caused by vibration.

[0015] 2. The anti-loosening screw assembly for grinding blocks described in this utility model forms additional lateral and axial constraints on the first anti-loosening sleeve through the arm of the limiting clamp and the limiting stop, respectively. Together with the functions of the first and second anti-loosening sleeves, it constructs a three-dimensional limiting system of lateral, axial and radial directions, which comprehensively restricts the displacement freedom of each component. In addition, the fitting and positioning of the first and second annular protrusions with the first through hole of the mounting ear further enhances the connection stability, ensuring that the grinding block is installed firmly and reliably under strong vibration and impact environments, and avoiding equipment failure caused by loosening and falling off. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the anti-loosening screw assembly for a grinding block according to the present invention;

[0017] Figure 2 This is an exploded schematic diagram of a grinding block anti-loosening screw assembly according to the present invention;

[0018] Figure 3 This is a schematic diagram of the anti-loosening screw structure of the grinding block in the anti-loosening screw assembly of the present invention.

[0019] Explanation of reference numerals on the accompanying drawings:

[0020] 1-Grinding block anti-loosening screw, 11-Nut, 12-First screw body, 13-Second screw body;

[0021] 2-First anti-loosening sleeve, 21-Second perforation, 22-First annular protrusion;

[0022] 3-Grinding block, 31-Grinding body, 32-Mounting ear, 321-First perforation;

[0023] 4-Second anti-loosening sleeve, 41-Third perforation, 42-Second annular protrusion;

[0024] 5-Grinding block bracket, 51-Contact surface, 52-Threaded hole, 53-Limiting clamp arm, 531-Arm body, 532-Limiting stop. Detailed Implementation

[0025] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0026] Example 1

[0027] like Figure 1-3 The present invention relates to a grinding block anti-loosening screw assembly used on an online grinding device for the clamping rolls of a hot-rolled strip steel coiler, comprising a grinding block anti-loosening screw 1, a first anti-loosening sleeve 2, a grinding block 3, a second anti-loosening sleeve 4, and a grinding block bracket 5.

[0028] The grinding block 3 includes a grinding body 31 and a mounting ear 32. The mounting ear 32 is fixed to the upper end of the grinding body 31 and has a first through hole 321. The grinding block anti-loosening screw 1 includes a nut 11, a first screw body 12, and a second screw body 13. The diameter of the first screw body 12 is larger than the diameter of the second screw body 13, and the second screw body 13 has external threads. The first anti-loosening sleeve 2 is rectangular in shape and has a second through hole 21. A first annular protrusion 22 is provided on the rear side. The inner diameter of the first annular protrusion 22 is the same as the diameter of the second through hole 21, and the outer diameter is adapted to the diameter of the first through hole 321. The second anti-loosening sleeve 4 is annular and has a third through hole 41. A second annular protrusion 42 is provided on the front side. The inner diameter of the second annular protrusion 42 is the same as the diameter of the third through hole 41, and the outer diameter is adapted to the diameter of the first through hole 321. The grinding block support 5 is provided with a contact surface 51, and a threaded hole 52 is provided on the contact surface. The threaded hole 52 is provided with an internal thread. The diameter of the second screw body 13 is matched with the diameter of the threaded hole 52. A limiting clamping arm 53 is also fixed on the left side of the grinding block support 5. The limiting clamping arm 53 extends out of the contact surface 51 and includes an arm body 531 and a limiting stop 532. The limiting stop 532 is provided at the end of the arm body 531 that extends forward out of the contact surface 51. The arm body 531 is perpendicular to the contact surface 51.

[0029] During assembly, the first annular protrusion 22 of the first anti-loosening sleeve 2 is inserted into the first through hole 321 of the mounting ear 32, so that the rear side of the first anti-loosening sleeve 2 fits against the front side of the mounting ear 32; the second annular protrusion 42 of the second anti-loosening sleeve 4 is inserted into the first through hole 321 of the mounting ear 32, so that the second anti-loosening sleeve 4 is clamped between the rear side of the mounting ear 32 and the contact surface 51. The grinding block anti-loosening screw 1 passes through the second through hole 21 of the first anti-loosening sleeve 2, the first through hole 321 of the mounting ear 32, and the third through hole 41 of the second anti-loosening sleeve 4 in sequence from front to back, and then the second screw body 13 is threadedly connected to the threaded hole 52 of the grinding block bracket 5. The diameter of the first screw body 12 is larger than the diameter of the second through hole 21 and the third through hole 41. When the grinding block anti-loosening screw 1 is tightened, the first screw body 12 exerts radial pressure on the first anti-loosening sleeve 2 and the second anti-loosening sleeve 4. At the same time, the front side of the first anti-loosening sleeve 2 abuts against the limiting stop 532 of the limiting clamp arm 53, and the left side abuts against the arm body 531.

[0030] In this embodiment, both the first anti-loosening sleeve 2 and the second anti-loosening sleeve 4 are made of rubber. Under the pre-tightening force of the anti-loosening screw 1 of the grinding block, they undergo elastic deformation, tightly filling the gaps between the components and enhancing the friction of the contact surface. The engagement of the first annular protrusion 22 and the second annular protrusion 42 with the first through hole 321, combined with the radial positioning of the first screw body 12 and the constraint of the limiting clamp arm 53, forms a stable three-dimensional limiting structure, effectively resisting vibration and impact during grinding operations and ensuring that the grinding block 3 is installed securely.

[0031] The above embodiments are exemplary and are intended to illustrate the technical concept and features of this utility model, so that those skilled in the art can understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A polishing block anti-loosening screw assembly for a hot strip mill down coiler pinch roll on-line polishing device, characterized in that: It includes a grinding block anti-loosening screw (1), a first anti-loosening sleeve (2), a grinding block (3), a second anti-loosening sleeve (4), and a grinding block bracket (5); The grinding block (3) includes a grinding body (31) and a mounting ear (32). The mounting ear (32) is fixed to the upper end of the grinding body (31) and has a first through hole (321). The anti-loosening screw (1) of the grinding block passes through the second through hole (21) on the first anti-loosening sleeve (2), the first through hole (321) on the mounting ear (32), and the third through hole (41) on the second anti-loosening sleeve (4) in sequence from front to back, and is then threadedly connected to the threaded hole (52) on the contact surface (51) on the grinding block bracket (5); The rear side of the first anti-loosening sleeve (2) is attached to the front side of the mounting ear (32), and the second anti-loosening sleeve (4) is sandwiched between the rear side of the mounting ear (32) and the contact surface (51).

2. The anti-loosening screw assembly for a grinding block according to claim 1, characterized in that, The grinding block bracket (5) is also fixed on the left side with a limiting clamp arm (53). The limiting clamp arm (53) extends out to a contact surface (51). The limiting clamp arm (53) includes an arm body (531) and a limiting stop (532). The limiting stop (532) is located at the end of the arm body (531) that extends forward to the contact surface (51). The arm body (531) is perpendicular to the contact surface (51). The front side of the first anti-loosening sleeve (2) abuts against the limiting stop (532), and the left side of the first anti-loosening sleeve (2) abuts against the arm body (531).

3. The anti-loosening screw assembly for a grinding block according to claim 2, characterized in that, Both the first anti-loosening sleeve (2) and the second anti-loosening sleeve (4) are made of elastic material.

4. The anti-loosening screw assembly for a grinding block according to claim 3, characterized in that, The anti-loosening screw (1) of the grinding block includes a nut (11), a first screw body (12), and a second screw body (13). The diameter of the first screw body (12) is larger than the diameter of the second screw body (13). The second screw body (13) is provided with an external thread, and the threaded hole (52) is provided with an internal thread. The diameter of the second screw body (13) is adapted to the diameter of the threaded hole (52).

5. The anti-loosening screw assembly for a grinding block according to claim 4, characterized in that, The diameter of the first screw body (12) is larger than the diameter of the second through hole (21) and the third through hole (41).

6. The anti-loosening screw assembly for a grinding block according to claim 5, characterized in that, The first anti-loosening sleeve (2) is in the shape of a cuboid block, and a first annular protrusion (22) is provided on the rear side. The inner diameter of the first annular protrusion (22) is the same as the diameter of the second through hole (21), and the outer diameter of the first annular protrusion (22) is adapted to the diameter of the first through hole (321). During assembly, the first annular protrusion (22) is embedded in the first through hole (321).

7. The anti-loosening screw assembly for a grinding block according to claim 6, characterized in that, The second anti-loosening sleeve (4) is annular, with a second annular protrusion (42) on the front side. The inner diameter of the second annular protrusion (42) is the same as the diameter of the third through hole (41), and the outer diameter of the second annular protrusion (42) is adapted to the diameter of the first through hole (321). When the two are fitted, the second annular protrusion (42) is embedded in the first through hole (321).

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