An electric loading and unloading tool for tensioning screws and nuts of a four-roll crusher
By designing a socket tool that works with a retaining ring and an electric wrench, the problem of difficult disassembly and assembly of the anti-reverse nut in a four-roll crusher was solved, achieving efficient disassembly and assembly and extending its service life, reducing the labor intensity of workers and improving maintenance efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINXING DUCTILE IRON PIPES CO LTD
- Filing Date
- 2025-04-29
- Publication Date
- 2026-06-02
AI Technical Summary
The existing four-roll crusher has difficult-to-remove anti-reverse nuts, resulting in low maintenance efficiency and increased labor intensity for workers.
Design a socket tool that includes a retaining ring and an electric wrench. The retaining ring precisely engages with the groove of the anti-reverse nut through a retaining block, and works with the electric wrench to automatically install and remove the anti-reverse nut, avoiding manual operation.
This technology enables efficient disassembly and assembly of anti-reverse nuts, reduces the labor intensity of workers, improves maintenance efficiency, and extends the service life of tools.
Smart Images
Figure CN224310526U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of four-roll crusher repair technology, specifically to an electric tool for loading and unloading the tensioning screw nut of a four-roll crusher. Background Technology
[0002] During the maintenance of a four-roll crusher, replacing the rolls requires loosening, disassembling, and tightening the nuts on the tensioning screw. However, the tensioning screw of a four-roll crusher is characterized by its long length and large diameter. Furthermore, some current four-roll crushers use slotted lock nuts to prevent the screw from loosening. These lock nuts use evenly spaced grooves on the outer wall of the nut, along with external locking washers, to ensure a closer fit and prevent loosening. While these lock nuts offer better anti-loosening performance, they are more difficult and complex to install and remove compared to ordinary nuts.
[0003] When disassembling and assembling common types of nuts, such as those with hexagonal structures, an electric wrench is used in conjunction with a socket tool. However, existing ordinary socket tools cannot be used with these special lock nuts, and electric wrenches cannot be used directly to disassemble or assemble lock nuts. As a result, maintenance workers can only use a sledgehammer to strike the grooves in the lock nut and a flat chisel to pry it to tighten or loosen the nut.
[0004] However, this traditional method is not only extremely inconvenient to operate, but also inefficient, which seriously increases the labor intensity of maintenance workers and affects the progress of maintenance work. Utility Model Content
[0005] In view of this, the present invention provides an electric loading and unloading tool for the tension screw nut of a four-roll crusher. The tool uses a retaining ring with a locking block to precisely engage with the groove of the anti-reverse nut. In conjunction with an electric wrench and a socket, the anti-reverse nut can be directly removed without manual disassembly and assembly. This greatly reduces the labor intensity of maintenance workers, ensures the normal operation of maintenance and protection work, and improves maintenance efficiency.
[0006] To solve the above-mentioned technical problems, this utility model provides an electric loading and unloading tool for the tensioning screw nut of a four-roll crusher. It includes a sleeve adapted to the rotating head of an electric wrench. A slot is provided at the end of the sleeve, and a lock nut with multiple evenly spaced grooves on its surface is threaded onto the screw. Multiple supports are fixed to the side wall of the sleeve, and retaining rings are uniformly fixed to the ends of the supports. The retaining rings and the sleeve are positioned on the same central axis. At least one retaining block is fixed to the inner wall of the retaining ring. When the worker places the retaining ring on the lock nut, the retaining block can engage with the lock nut, achieving a meshing fit. Then, the rotating head of the electric wrench is inserted into the groove of the sleeve, and the electric wrench is activated to rotate the sleeve. The sleeve rotates the retaining ring through the supports, and the retaining ring, through the retaining block, drives the lock nut to rotate synchronously. This eliminates the need for manual disassembly and assembly, greatly reducing the labor intensity of maintenance workers, ensuring normal maintenance and protection work, and improving maintenance efficiency.
[0007] The inner contour of the retaining ring matches the outer contour of the anti-reverse nut, making the circular retaining ring fit better when it is fitted onto the anti-reverse nut, thus making the anti-reverse nut easier to remove.
[0008] The number of locking blocks is the same as the number of slots on the surface of the anti-reverse nut, so that each slot of the anti-reverse nut is engaged by a locking block, thereby making the retaining ring and the anti-reverse nut more tightly engaged.
[0009] The number of supports is at least two, and multiple supports are evenly distributed on the axial surface of the sleeve. The bushing and the retaining ring are fixed by the evenly distributed supports, so that the pressure distribution on the retaining ring and the bushing is more uniform.
[0010] Both the bracket and the retaining ring are made of high-strength alloy steel. Through high-strength design, the bracket and retaining ring can withstand higher loads, prevent breakage, and improve the service life of the device.
[0011] A limiting tube is fixed to the end of the sleeve facing the retaining ring. When the retaining ring is fitted onto the surface of the anti-reverse nut, the screw threaded to the anti-reverse nut can be inserted into the limiting tube. When the worker fits the retaining ring onto the anti-reverse nut, its limiting tube will also fit onto the screw, so that the limiting tube wraps around the screw. When rotating the retaining ring, the limiting tube and the screw guide the retaining ring to make the rotation process more stable and improve the disassembly effect.
[0012] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects:
[0013] 1. Enables efficient disassembly and assembly of anti-lock nuts, completely eliminating the traditional manual hammering and prying methods. Compared with traditional methods, it greatly improves disassembly and assembly efficiency, reduces the labor intensity of operators, ensures normal maintenance and protection work, and improves maintenance efficiency.
[0014] 2. Multiple structures ensure stability. The limiting tube ensures that the retaining ring remains coaxial with the anti-reverse nut during rotation, avoiding misalignment that could cause the retaining block to dislodge or damage to the nut, thus ensuring a smooth and reliable disassembly process.
[0015] 3. Optimize structural strength and adaptability. Through high-strength design, the bracket and retaining ring can withstand higher loads, prevent breakage, and improve the service life of the device.
[0016] 4. Optimized fit: The circular retaining ring fits the anti-reverse nut better, resulting in better removal of the anti-reverse nut. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the main structure of this utility model;
[0018] Figure 2 This is a schematic diagram of the bottom structure of the main body of this utility model;
[0019] Figure 3 This is a schematic diagram of the anti-reverse nut structure of this utility model;
[0020] Figure 4 This is a schematic diagram of the structure of the anti-reverse nut of this utility model during disassembly.
[0021] Explanation of reference numerals in the attached figures:
[0022] 100. Sleeve; 101. Bracket; 200. Snap ring; 201. Snap block; 300. Limiting tube; 400. Anti-reverse nut; 401. Snap groove; 500. Screw. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figures 1-4 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.
[0024] An electric loading and unloading tool for the tensioning screw nut of a four-roll crusher, such as Figure 1 , Figure 3 and Figure 4As shown: A socket 100 adapted to the rotating head of an electric wrench is included. The socket 100 is a common wrench socket 100 in the prior art, with a slot at its end for inserting the rotating head of the electric wrench into the slot to drive the socket 100 to rotate. A lock nut 400 is threaded onto a screw 500, and multiple slots 401 are evenly distributed on the surface of the lock nut 400. Multiple brackets 101 are fixed to the side wall of the socket 100, and the ends of the multiple brackets 101 are uniformly aligned. A retaining ring 200 is fixed, and the retaining ring 200 and the sleeve 100 are located on the same central axis. At least one retaining block 201 is fixed on the inner wall of the retaining ring 200. When the retaining ring 200 is sleeved on the anti-reverse nut 400, the retaining block 201 can be correspondingly engaged with the retaining groove 401 of the anti-reverse nut 400. When the electric wrench drives the bracket 101 and the retaining ring 200 to rotate through the sleeve 100, the retaining ring 200 can drive the anti-reverse nut 400 to rotate synchronously through the retaining block 201.
[0025] When workers need to remove the anti-reverse nut 400 from the screw 500, they put the retaining ring 200 on the anti-reverse nut 400, and the retaining block 201 on the inner wall of the retaining ring 200 is embedded in the retaining groove 401 of the anti-reverse nut 400, so that the retaining ring 200 and the anti-reverse nut 400 are in a precise meshing state. Then, the rotating head of the electric wrench is inserted into the slot of the sleeve, and the electric wrench is started to drive the sleeve to rotate. The sleeve drives the retaining ring 200 to rotate synchronously through the bracket 101. Since the retaining ring 200 and the anti-reverse nut 400 are meshed with each other, the retaining ring 200 can drive the anti-reverse nut 400 to rotate synchronously when it rotates, so that the anti-reverse nut 400 can be removed from the surface of the screw 500 without manual disassembly and assembly, which greatly reduces the labor intensity of maintenance workers, ensures the normal operation of maintenance and protection work, and improves maintenance efficiency.
[0026] Specifically, the inner wall contour of the retaining ring 200 matches the outer wall contour of the anti-reverse nut 400. Since the anti-reverse nut 400 is a circular structure, the retaining ring 200, which is also circular, fits the anti-reverse nut 400 better when it is fitted onto the anti-reverse nut 400, and the retaining ring 200 is more effective in disassembling the anti-reverse nut 400.
[0027] Specifically, the number of locking blocks 201 is the same as the number of locking slots 401 on the surface of the anti-reverse nut 400, so that each slot 401 of the anti-reverse nut 400 is engaged by the locking blocks 201, thereby making the retaining ring 200 and the anti-reverse nut 400 more tightly engaged.
[0028] When using different anti-reverse nuts 400, if the number and position of the slots 401 of the anti-reverse nuts 400 are inconsistent, retaining rings 200 of different specifications can be made to match the anti-reverse nuts 400.
[0029] Specifically, the number of supports 101 is at least two, preferably four. The multiple supports 101 are evenly distributed on the axial surface of the sleeve 100. The bushing and the retaining ring 200 are fixed together by the evenly distributed supports 101, which makes the stability between the two stronger and the pressure distribution more uniform.
[0030] Furthermore, both the bracket 101 and the retaining ring 200 are high-strength alloy steel structures, and the retaining ring 200 and the retaining block 201 on its inner wall are made of the same material. Through the high-strength design, the bracket 101 and the retaining ring 200 can withstand higher loads, prevent breakage, and improve the service life of the device.
[0031] according to Figure 2 and Figure 4 As shown, specifically, a limiting tube 300 is fixed at one end of the sleeve 100 facing the retaining ring 200. When the retaining ring 200 is sleeved on the surface of the anti-reverse nut 400, the screw 500 threadedly connected to the anti-reverse nut 400 can be inserted into the limiting tube 300.
[0032] When the worker places the retaining ring 200 onto the anti-reverse nut 400, its limiting tube 300 will also be placed onto the screw 500, so that the limiting tube 300 wraps around the screw 500. The limiting tube 300 is made of M106 steel structure pipe, and the screw 500 is an M100 type screw 500. After the limiting tube 300 is placed on the screw 500, there is a certain small gap between the inner wall of the limiting tube 300 and the screw 500. When the retaining ring 200 is rotated, the limiting tube 300 and the screw 500 guide the rotation of the retaining ring 200, making the rotation process of the retaining ring 200 more stable and improving the disassembly effect.
[0033] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.
Claims
1. An electric tool for loading and unloading the tensioning screw nut of a four-roll crusher, comprising a sleeve (100) adapted to the rotating head of an electric wrench, and a locking nut (400) threadedly mounted on the screw (500), characterized in that: The sleeve (100) is fixed with a retaining ring (200) by a bracket (101), and the retaining ring (200) and the sleeve (100) are coaxially arranged. At least one retaining block (201) is fixed on the inner wall of the retaining ring (200). When the retaining ring (200) is sleeved on the anti-reverse nut (400), the retaining block (201) can be embedded in the retaining groove (401) of the anti-reverse nut (400). When the electric wrench drives the bracket (101) and the retaining ring (200) to rotate through the sleeve (100), the retaining ring (200) can drive the anti-reverse nut (400) to rotate synchronously through the retaining block (201).
2. The electric loading and unloading tool for the tensioning screw nut of a four-roll crusher as described in claim 1, characterized in that: The inner wall profile of the retaining ring (200) is a circular structure that matches the outer wall profile of the anti-reverse nut (400).
3. The electric loading and unloading tool for the tensioning screw nut of a four-roll crusher as described in claim 2, characterized in that: The number of the locking blocks (201) is the same as the number of the slots (401) on the surface of the anti-reverse nut (400).
4. The electric loading and unloading tool for the tensioning screw nut of a four-roll crusher as described in claim 1, characterized in that: The number of the brackets (101) is at least two, and the plurality of the brackets (101) are evenly distributed on the axial surface of the sleeve (100).
5. The electric loading and unloading tool for the tensioning screw nut of a four-roll crusher as described in claim 1, characterized in that: The sleeve (100) is fixed with a limiting tube (300) at one end facing the retaining ring (200). When the retaining ring (200) is sleeved on the surface of the anti-reverse nut (400), the screw (500) threadedly connected to the anti-reverse nut (400) can be inserted into the limiting tube (300).
6. The electric loading and unloading tool for the tensioning screw nut of a four-roll crusher as described in claim 1, characterized in that: Both the bracket (101) and the retaining ring (200) are high-strength alloy steel structures.