U-shaped ring lead screw unscrewing prevention device
By designing the U-ring screw anti-ret device, the limit groove structure of the anti-ret ring and the connecting block is used to form a stable torque in combination with the spring, the problem of screw retraction in the hoisting equipment is solved and safety and efficiency are improved.
Patent Information
- Application Number
- CN202422285335.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-19
AI Technical Summary
The existing U-ring hoisting equipment has problems of high safety risks and low working efficiency. It is mainly because the nut rotates and moves when the hoisting object swings in the air, and the preload cannot be effectively achieved. The spring pin is easy to rotate during use, causing the hoisting part to fall off.
A U-ring screw anti-retraction device is designed, which includes an anti-retraction ring, a connecting block, a connecting pin and a spring. Through the limiting groove and forward angle design, the screw can only rotate in one direction, and combines the spring to form a stable torque to prevent the screw from retreating.
Effectively prevent the screw from retreating, improve the safety and working efficiency of the lifting equipment, reduce safety risks, and ensure the continuity of production.
Smart Images
Figure CN223117984U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of hoisting machinery, in particular to a U-shaped ring screw anti-backlash device. Background Art
[0002] In recent years, with the high frequency of hoisting operations, the dynamic swing of the hoisted objects in the air, the operators' careless inspection, the lack of experience of the crane operators and other reasons have caused the U-shaped ring to buckle and slip, resulting in high labor intensity, low work efficiency and great safety risks. According to statistics, personal injury incidents and attempted incidents in hoisting operations have increased in recent years. The occurrence of these incidents has to consider the research and application of equipment technology.
[0003] In order to reduce safety risks and labor intensity and improve work efficiency, a device and method for using a U-shaped ring screw to prevent back-off is provided. Simply put, when the operator uses a U-shaped ring to connect the hoisting parts, the existing U-shaped ring anti-back-off is an external cotter pin or spring pin. During the operation, since the cotter pin is fixed on the screw, and the swing of the hoisted object during displacement in the air will be transmitted to the nut, the nut forms a local rotation activity and the nut cannot achieve the initial pre-tightening force to prevent back-off. The reason is that there is an active area of about 3mm between the cotter pin hole and the nut, and the pre-tightening force cannot be effectively achieved. The newly developed anti-back-off device can effectively achieve constant pre-tightening force. Secondly, the existing spring pin rotates after the rope is loaded or momentarily unloaded during use, and the spring pin is bounced off. The safety risk is extremely high and it is very easy to cause incidents and accidents. It is urgent to develop a new anti-back-off device to achieve safety and efficiency. In this way, safety risks can be reduced, the continuity of enterprise production can be guaranteed, and personal injury and equipment damage can be reduced. Utility Model Content
[0004] The utility model aims to solve the shortcomings in the prior art and proposes a U-shaped ring screw anti-back-off device.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a U-shaped ring screw anti-backoff device, comprising a U-shaped ring body, an anti-backoff mechanism is installed at the bottom of the U-shaped ring body, the anti-backoff mechanism comprises an outer shell, the outer surface of the outer shell is fixedly connected to the bottom of the U-shaped ring body, an inner cavity is provided inside the outer shell, an anti-backoff ring is installed inside the inner cavity, a limiting groove is provided on the outer ring of the anti-backoff ring, and the number of the limiting grooves is multiple, a through hole is provided on the side wall of the outer shell, a connecting pin is installed inside the through hole, a connecting block is installed at one end of the connecting pin, the connecting block is installed inside the limiting groove, a spring is provided on the outer surface of the connecting pin, and the spring is located between the connecting block and the outer shell.
[0006] As a further description of the above technical solution:
[0007] The outer surface of the connection block is provided with a limit hole, and one end of the connection pin is threadedly connected to the inner wall of the limit hole.
[0008] As a further description of the above technical solution:
[0009] A partition is fixedly connected to the outer surface of the connection pin, and the partition is located outside the housing.
[0010] As a further description of the above technical solution:
[0011] A fixing pin is fixedly connected to the outer surface of the partition, and an anti-slip thread is provided on the outer surface of the fixing pin.
[0012] As a further description of the above technical solution:
[0013] A fixing plate is installed on the side wall of the housing, and the inner diameter of the fixing plate is equal to the inner diameter of the anti-retreat ring.
[0014] As a further description of the above technical solution:
[0015] A clamping groove is provided on the side wall of the housing, a clamping block is fixedly connected to the side of the fixing plate, and the clamping block is installed inside the clamping groove.
[0016] As a further description of the above technical solution:
[0017] A lead screw is installed inside the anti-retreat mechanism, and the outer surface of the lead screw is threadedly connected to the inner ring of the anti-retreat ring.
[0018] The utility model has the following beneficial effects:
[0019] Compared with the prior art, in the U-shaped ring lead screw anti-loosening device, through the anti-retreat ring, connection block, connection pin, and spring, when in use, the connection block is stuck inside the limit groove on the anti-retreat ring. Under the action of the front inclination angle and the braking angle, the lead screw can only rotate in one direction inside the anti-retreat ring, and reverse rotation will be blocked by the connection block and cannot rotate in the reverse direction. And under the action of the spring, a stable torque can be formed between the anti-retreat ring and the lead screw, which is convenient for the lead screw to be rotated and installed inside the anti-retreat ring for use. Compared with the existing U-shaped ring connection hoisting piece, when using an opening pin to fix on the lead screw, the swing will be transmitted to the nut when the suspended object displaces in the air, the nut forms local rotational movement and the nut cannot achieve the initial pre-tightening force anti-loosening, and the safety risk is extremely high, and it is very easy to cause events and accidents. The U-shaped ring lead screw anti-loosening device has a reasonable structure and can effectively prevent the tightened lead screw from retreating, which is convenient for the use of the U-shaped ring hoisting piece on the hoisting equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the overall structure of the U-shaped ring lead screw anti-loosening device proposed by the utility model;
[0021] Figure 2 This is a cross-sectional view of the internal structure of the U-shaped ring screw anti-loosening device proposed by the present utility model;
[0022] Figure 3 For the U-shaped ring screw anti-loosening device proposed by the present utility model Figure 2 The enlarged view of the structure at position A;
[0023] Figure 4 This is an exploded view of the anti-loosening mechanism of the U-shaped ring screw anti-loosening device proposed by the present utility model.
[0024] Legend:
[0025] 1. U-shaped ring body; 2. Anti-loosening mechanism; 201. Outer shell; 202. Inner cavity; 203. Anti-loosening ring; 204. Limiting groove; 205. Connecting block; 206. Limiting hole; 207. Through hole; 208. Connecting pin; 209. Partition plate; 210. Fixed pin; 211. Spring; 212. Fixed plate; 3. Screw rod. Detailed implementation manners
[0026] Refer to Figures 1-4, the U-shaped ring screw anti-loosening device provided by the utility model: includes a U-shaped ring body 1, and an anti-loosening mechanism 2 is installed at the bottom of the U-shaped ring body 1, which can prevent the screw installed inside from retreating due to vibration or other reasons. The anti-loosening mechanism 2 includes a housing 201, the outer surface of the housing 201 is fixedly connected to the bottom of the U-shaped ring body 1, a cavity 202 is opened inside the housing 201, an anti-loosening ring 203 is installed inside the cavity 202, and the anti-loosening ring 203 can move inside the cavity 202. A plurality of limiting grooves 204 are opened on the outer ring of the anti-loosening ring 203, and the limiting grooves 204 are triangular structures, one angle is a front inclination angle of 70° and the other angle is a braking angle of 90°. The hypotenuse of the front inclination angle is 2 mm and the vertical side length is 2 mm. The tooth circumference of the screw 3 is evenly distributed and locking is achieved every 2 mm, greatly improving the long-term maintenance of the pre-tightening force. A through hole 207 is opened on the side wall of the housing 201, and a connecting pin 208 is installed inside the through hole 207. The connecting pin 208 can move back and forth inside the through hole 207. One end of the connecting pin 208 is installed with a connecting block 205, and the connecting block 205 is installed inside the limiting groove 204. When the connecting block 205 is installed inside the limiting groove 204, the screw 3 can rotate in one direction inside the anti-loosening ring 203 and cannot rotate in the reverse direction. A spring 211 is arranged on the outer surface of the connecting pin 208, and the spring 211 is located between the connecting block 205 and the housing 201. Under the action of the spring 211, a stable torque can be formed between the anti-loosening ring 203 and the screw 3, facilitating the rotation and installation of the screw 3 into the anti-loosening ring 203 for use. A screw 3 is installed inside the anti-loosening mechanism 2, and the outer surface of the screw 3 is threadedly connected to the inner ring of the anti-loosening ring 203, and the bottom of the U-shaped ring body 1 is connected through the screw 3.
[0027] A limiting hole 206 is opened on the outer surface of the connecting block 205, and one end of the connecting pin 208 is threadedly connected to the inner wall of the limiting hole 206. During use, the connecting block 205 can be installed into the limiting groove 204 first, and then the connecting pin 208 can be passed through the through hole 207 and then connected to the connecting block 205, facilitating the assembly and use of the U-shaped ring screw anti-loosening device.
[0028] A partition 209 is fixedly connected to the outer surface of the connecting pin 208, and the partition 209 is located outside the housing 201. The partition 209 can prevent the connecting pin 208 from completely entering the housing 201. A fixing pin 210 is fixedly connected to the outer surface of the partition 209, and anti-slip patterns are arranged on the outer surface of the fixing pin 210. When the user pulls the fixing pin 210 outwards, the connecting block 205 can be taken out from the limiting groove 204.
[0029] A fixing plate 212 is installed on the side wall of the outer shell 201. The inner diameter of the fixing plate 212 is equal to the inner diameter of the anti-retreat ring 203. The opening on the side of the outer shell 201 is sealed by the fixing plate 212 to prevent the anti-retreat ring 203 from falling out of the outer shell 201. A clamping groove is provided on the side wall of the outer shell 201. A clamping block is fixedly connected to the side of the fixing plate 212. The clamping block is installed inside the clamping groove. The clamping block can be fixed in the clamping groove by welding, so that the fixing plate 212 can be fixed on the outer shell 201.
[0030] Working principle: During use, the connecting block 205 is stuck inside the limiting groove 204 on the anti-retreat ring 203. Under the action of the front inclination angle and the braking angle, the lead screw 3 can only rotate in one direction inside the anti-retreat ring 204. Reverse rotation will be blocked by the connecting block 205 and cannot rotate in the reverse direction. And under the action of the spring 211, a stable torque can be formed between the anti-retreat ring 203 and the lead screw 3, which is convenient for the lead screw 3 to be rotated and installed inside the anti-retreat ring 203 for use. The U-shaped ring lead screw anti-loosening device has a reasonable structure and can effectively prevent the tightened lead screw 3 from retreating, which is convenient for the use of the U-shaped ring lifting parts on the hoisting equipment.
[0031] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. U-shaped ring screw anti-loosening device, including a U-shaped ring body (1), characterized in that: A anti-withdrawal mechanism (2) is installed at the bottom of the U-shaped ring body (1). The anti-withdrawal mechanism (2) includes a housing (201), the outer surface of the housing (201) is fixedly connected to the bottom of the U-shaped ring body (1), a cavity (202) is formed inside the housing (201), an anti-withdrawal ring (203) is installed inside the cavity (202), a plurality of limiting grooves (204) are formed on the outer ring of the anti-withdrawal ring (203), a through hole (207) is formed on the side wall of the housing (201), a connecting pin (208) is installed inside the through hole (207), a connecting block (205) is installed at one end of the connecting pin (208), the connecting block (205) is installed inside the limiting groove (204), a spring (211) is arranged on the outer surface of the connecting pin (208), and the spring (211) is located between the connecting block (205) and the housing (201).
2. The U-shaped ring screw anti-loosening device according to claim 1, characterized in that: A limiting hole (206) is formed on the outer surface of the connecting block (205), and one end of the connecting pin (208) is threadedly connected to the inner wall of the limiting hole (206).
3. The U-shaped ring lead screw anti-loosening device according to claim 1, wherein: A partition plate (209) is fixedly connected to the outer surface of the connecting pin (208), and the partition plate (209) is located outside the housing (201).
4. The U-shaped ring screw anti-loosening device according to claim 3, characterized in that: A fixing pin (210) is fixedly connected to the outer surface of the partition plate (209), and anti-slip lines are arranged on the outer surface of the fixing pin (210).
5. The U-shaped ring screw anti-loosening device according to claim 1, wherein: A fixing plate (212) is installed on the side wall of the housing (201), and the inner diameter of the fixing plate (212) is equal to the inner diameter of the anti-withdrawal ring (203).
6. The U-shaped ring lead screw anti-loosening device according to claim 5, characterized in that: A clamping groove is formed on the side wall of the housing (201), a clamping block is fixedly connected to the side of the fixing plate (212), and the clamping block is installed inside the clamping groove.
7. The U-shaped ring screw anti-loosening device according to claim 1, characterized in that: A lead screw (3) is installed inside the anti-withdrawal mechanism (2), and the outer surface of the lead screw (3) is threadedly connected to the inner ring of the anti-withdrawal ring (203).