High-profile handle fixing screw structure

Abstract

The utility model belongs to mechanical control technical field relates to high screw structure for handle fixing, including support sleeve and screw body, the upper end fixed connection of screw body has sawtooth column, the inside of support sleeve is equipped with sleeve inner groove, sawtooth column and sleeve inner groove sliding joint, the outside fixed connection of support sleeve has handle body, the upper end of support sleeve and screw body is provided with locking assembly, the utility model discloses through the structural design of sawtooth column and sleeve inner groove, increased the torque between device, and then when screw body and other components because of corrosion or long -term use and produce greater torque, through the structural design of sawtooth column and sleeve inner groove, make rotating handle body can more conveniently dismantle screw body.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical control technology and relates to a screw structure for fixing a high-adjustment handle. Background Technology

[0002] In industrial equipment, household appliances, and mechanical devices, the reliable fixation of high-adjustment handles (such as regulating valve handles, control levers, or knobs) has a decisive impact on operational accuracy and safety. As a key component of human-machine interaction, the performance of these handles directly determines the adjustment accuracy, operational reliability, and service life of the equipment. With the increasing level of industrial automation and the growing complexity of equipment operating environments, the performance requirements for high-adjustment handles are also showing new development trends and challenges.

[0003] From an industrial application perspective, high-adjustment handles play a crucial role in process control systems. Taking control valves in the chemical industry as an example, the reliability of the handle's fixation directly affects the control accuracy of the medium flow. In actual operation, the vibration frequency generated by the pipeline system is usually in the range of 30-80Hz. This continuous mechanical vibration can easily cause the traditional threaded connection structure to loosen. According to statistics, about 23% of industrial control valve failures originate from the failure of the handle's fixing structure, which in turn leads to a decrease in control accuracy and, in severe cases, even safety accidents such as medium leakage. In the energy equipment field, such as in steam turbine control systems, even a small displacement of the handle (usually required to be controlled within ±0.5) can cause significant fluctuations in output power, which places extremely high demands on the stability of the fixing structure. In the home appliance field, high-adjustment handles face different challenges. Taking the program knob of a washing machine as an example, it needs to be stable during the spin-drying process. To withstand continuous vibrations up to 20Hz and meet adjustment life requirements of at least 10,000 cycles, market research data shows that approximately 15% of home appliance after-sales repair cases are related to the failure of the knob fixing structure. Especially in humid environments, the electrochemical corrosion between the metal screw and the plastic substrate can significantly accelerate the failure process of the threaded structure. This problem is particularly prominent in water-contaminated appliances such as dishwashers and washing machines. From a mechanical device perspective, the fixing reliability of the high-adjustment handle is also crucial. On the control panel of a CNC machine tool, the micron-level displacement of the control lever will be amplified into a significant machining error through the transmission system. Experimental data shows that when the axial clearance of the handle fixing structure exceeds 0.1mm, the roundness deviation of the machined workpiece will increase by 8-12μm. In automated production lines, if the control knob of a robotic arm becomes loose, it may lead to program errors, resulting in the serious consequence of the entire line stopping.

[0004] The commonly used fixing method is to assemble the screw and handle together by threaded connection. During use, the screw is tightened or loosened by rotating the handle. However, this traditional structure has obvious technical defects in practical applications: when the screw and other parts generate large torque due to corrosion or long-term use, the torque-bearing capacity of the connection between the handle and the screw is weak. During disassembly, the connection between the handle and the screw often fails before the connection between the screw and other parts, causing the handle to fall off while the screw remains stuck in the installation position. This situation not only increases the difficulty of maintenance, but may also cause safety hazards due to operational failure. This problem is particularly prominent in highly corrosive environments such as chemical equipment and marine equipment, seriously affecting the reliability of the equipment and maintenance efficiency. Utility Model Content

[0005] The technical problem this utility model aims to solve is that the commonly used fixing method is to assemble the screw and the handle together by threaded connection. During use, the screw is tightened or loosened by rotating the handle. However, this traditional structure has obvious technical defects in practical applications: when the screw and other components generate large torque due to corrosion or long-term use, the torque bearing capacity of the connection end between the handle and the screw is weak. During disassembly, the connection between the handle and the screw often fails before the connection between the screw and other components, causing the handle to fall off while the screw remains stuck in the installation position. This situation not only increases the difficulty of maintenance but may also cause safety hazards due to operational failure. This problem is particularly prominent in highly corrosive environments such as chemical equipment and marine equipment, seriously affecting the reliability and maintenance efficiency of the equipment.

[0006] The high-profile handle fixing screw structure described in this utility model includes a support sleeve and a screw body; a serrated post is fixedly connected to the upper end of the screw body; an inner groove is opened on the inner side of the support sleeve; the serrated post and the inner groove of the sleeve are slidably engaged; a handle body is fixedly connected to the outer side of the support sleeve; and a locking component is provided at the upper end of the support sleeve and the screw body.

[0007] A limit ring is fixedly connected to the upper end of the support sleeve.

[0008] The locking assembly includes a fixing ring; a fixing ring is fixedly connected to the upper end of the limiting ring; a support ring is fixedly connected to the upper end of the serrated column; an eccentric shaft is rotatably connected to the inner side of the serrated column; the eccentric shaft is rotatably connected to the support ring; and an eccentric circle is fixedly connected to the outer side of the eccentric shaft.

[0009] The inner side of the upper end of the eccentric shaft is provided with an internal hexagonal groove.

[0010] A guide block is fixedly connected to the lower end of the screw body.

[0011] The outer side of the handle body is provided with anti-slip grooves.

[0012] Compared with the prior art, the beneficial effects of this utility model are: through the structural design of the serrated column and the inner groove of the sleeve, the torque between the devices is increased. Thus, when the screw body and other components generate a large torque due to corrosion or long-term use, the structural design of the serrated column and the inner groove of the sleeve makes it easier to disassemble the screw body by rotating the handle body.

[0013] The device's design, featuring a serrated post and a sleeve groove, allows for the replacement of screw bodies of different sizes. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0016] Figure 2 This is a schematic diagram of the sawtooth column of this utility model;

[0017] Figure 3 This is a schematic diagram of the inner groove of the sleeve in this utility model;

[0018] Figure 4 This is a cross-sectional structural schematic diagram of the support ring of this utility model;

[0019] Figure 5 This is a cross-sectional structural schematic diagram of the limiting ring of this utility model;

[0020] Figure 6 This is a schematic diagram of the structure of this utility model in the locked state of the eccentric circle and the fixed ring.

[0021] In the diagram: 101, support sleeve; 102, screw body; 103, serrated post; 104, inner groove of sleeve; 105, handle body; 201, limit ring; 301, fixing ring; 302, eccentric shaft; 303, eccentric circle; 304, support ring; 401, internal hexagonal groove; 501, guide block; 601, anti-slip groove. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0024] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] Example

[0027] like Figure 1 - Figure 6 As shown, the screw structure for fixing the high-adjustment handle includes a support sleeve 101 and a screw body 102; a serrated post 103 is fixedly connected to the upper end of the screw body 102; an inner groove 104 is provided on the inner side of the support sleeve 101; the serrated post 103 and the inner groove 104 are slidably engaged; a handle body 105 is fixedly connected to the outer side of the support sleeve 101; and a locking assembly is provided at the upper ends of the support sleeve 101 and the screw body 102.

[0028] The support sleeve 101 is fitted onto the outside of the serrated column 103, so that the serrated column 103 and the inner groove 104 of the sleeve are engaged with each other, thereby increasing the torque between the devices.

[0029] The upper end of the support sleeve 101 is fixedly connected to a limiting ring 201; the limiting ring 201 enables the worker to limit the serrated column 103 during the installation of the support sleeve 101 and the screw body 102.

[0030] The locking assembly includes a retaining ring 301; the upper end of the limiting ring 201 is fixedly connected to the retaining ring 301; the upper end of the serrated column 103 is fixedly connected to the supporting ring 304; the inner side of the serrated column 103 is rotatably connected to the eccentric shaft 302; the eccentric shaft 302 is rotatably connected to the supporting ring 304; and the outer side of the eccentric shaft 302 is fixedly connected to the eccentric circle 303.

[0031] After the support sleeve 101 is fitted onto the outside of the serrated post 103, the support ring 304 and the eccentric circle 303 on the serrated post 103 pass through the limiting ring 201. The limiting ring 201 and the support ring 304 have the same thickness. Then, the eccentric shaft 302 is rotated, causing the eccentric shaft 302 to drive the eccentric circle 303 to rotate. Through the eccentric structural design, the eccentric circle 303 and the fixing ring 301 abut against each other, thereby fixing the serrated post 103 and preventing vibration from causing the support sleeve 101 to separate from the screw body 102 without human intervention.

[0032] The inner side of the upper end of the eccentric shaft 302 is provided with an internal hexagonal groove 401. Through the internal hexagonal groove 401, the operator can rotate the eccentric shaft 302 with a tool to drive the eccentric circle 303 to rotate.

[0033] A guide block 501 is fixedly connected to the lower end of the screw body 102; the operator guides the screw body 102 through the guide block 501, thereby making the installation of the screw body 102 faster.

[0034] The outer side of the handle body 105 is provided with an anti-slip groove 601; the anti-slip groove 601 increases the friction between the handle body 105 and the operator's hand, thereby allowing a greater grip force to be applied when rotating the handle body 105.

[0035] During operation, the support sleeve 101 is fitted onto the outside of the serrated column 103, so that the serrated column 103 engages with the inner groove 104 of the sleeve. After the support sleeve 101 is fitted onto the outside of the serrated column 103, the support ring 304 and the eccentric circle 303 on the serrated column 103 pass through the limiting ring 201. The limiting ring 201 and the support ring 304 have the same thickness. Then, the eccentric shaft 302 is rotated, so that the eccentric shaft 302 drives the rotating eccentric circle 303 to rotate. Through the eccentric structural design, the eccentric circle 303 and the fixing ring 301 abut against each other, thereby fixing the serrated column 103 and preventing vibration from causing the support sleeve 101 to separate from the screw body 102 without human intervention.

[0036] The staff then used guide block 501 to move the device to the inside of the threaded hole where the component needs to be fixed, and then rotated handle body 105 to connect screw body 102 to the device.

[0037] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. The present utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A screw structure for fixing a high-adjustment handle, characterized in that: It includes a support sleeve (101) and a screw body (102); a serrated post (103) is fixedly connected to the upper end of the screw body (102); an inner groove (104) is provided on the inner side of the support sleeve (101); the serrated post (103) and the inner groove (104) are slidably engaged; a handle body (105) is fixedly connected to the outer side of the support sleeve (101); and a locking assembly is provided at the upper end of the support sleeve (101) and the screw body (102).

2. The screw structure for fixing the high-adjustment handle according to claim 1, characterized in that: The upper end of the support sleeve (101) is fixedly connected to a limit ring (201).

3. The screw structure for fixing the high-adjustment handle according to claim 2, characterized in that: The locking assembly includes a fixing ring (301); the upper end of the limiting ring (201) is fixedly connected to the fixing ring (301); the upper end of the serrated column (103) is fixedly connected to the support ring (304); the inner side of the serrated column (103) is rotatably connected to the eccentric shaft (302); the eccentric shaft (302) is rotatably connected to the support ring (304); and the outer side of the eccentric shaft (302) is fixedly connected to the eccentric circle (303).

4. The screw structure for fixing the high-adjustment handle according to claim 3, characterized in that: The inner side of the upper end of the eccentric shaft (302) is provided with an internal hexagonal groove (401).

5. The screw structure for fixing the high-adjustment handle according to claim 1, characterized in that: A guide block (501) is fixedly connected to the lower end of the screw body (102).

6. The screw structure for fixing a high-adjustment handle according to claim 1, characterized in that: The outer side of the handle body (105) is provided with anti-slip grooves (601).

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