A mold fixing accessory to prevent loosening
The combined structure of the support body, extension and raised base provides central support and segmented notch design, which solves the problem of deformation and loosening of long guide shafts and improves the stability and service life of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MAIGO PRECISION MANUFACTURING (HUIZHOU) CO LTD
- Filing Date
- 2025-08-06
- Publication Date
- 2026-06-30
AI Technical Summary
Long guide shafts are prone to loosening due to deflection deformation in large molds or long-stroke automated equipment, which affects the positioning accuracy of moving parts and the life of the equipment.
The structure employs a combination of support body, extension, raised base and guide shaft perforation to provide central support. The segmented notch design creates a slight strain space to avoid deformation and loosening, and enhances rigid contact wear.
It effectively prevents guide shaft deformation and loosening, improves equipment stability and service life, reduces wear, and maintains accuracy.
Smart Images
Figure CN224424013U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mold accessories technology, specifically to a mold fixing accessory for preventing loosening. Background Technology
[0002] In the field of precision molds and automated equipment, the guide shaft is a core component that ensures the precise positioning and stable operation of moving parts. Its structural stability directly affects the working accuracy and service life of the entire device. However, in large molds or long-stroke automated equipment, in order to meet the stroke requirements of moving parts, the guide shaft often needs to be designed to be longer. It is common to set two sets of moving parts on a single guide shaft. This design feature brings significant technical challenges.
[0003] Longer guide shafts are subjected to the combined effects of multiple loads during operation: on the one hand, the weight of the guide shaft material itself generates a continuous downward bending moment, especially forming a stress concentration area in the middle section of the shaft; on the other hand, moving parts such as the moving mold and moving blocks mounted on the guide shaft generate periodic radial pressure and axial impact forces during reciprocating motion, further exacerbating the stress on the shaft. Under the long-term action of these forces, the guide shaft is prone to deflection deformation in its middle region—commonly referred to as "middle sag." This deformation does not occur instantaneously but gradually intensifies with accumulated working time. Initially, it may only manifest as micron-level bending, but as the deformation deepens, it will directly compromise the assembly accuracy between the guide shaft and the mating components.
[0004] In existing technologies, guide shafts are often fixed using rigid support structures at both ends. While this design can meet the fixing requirements of short shafts, for long guide shafts, the lack of effective support in the middle section makes it a weak point prone to deformation. When the deflection exceeds the allowable range, it first leads to an increase in the clearance between the guide shaft and the sliding components, causing loosening and abnormal vibration and noise during operation. Second, deformation causes the axis of the guide shaft to deviate from the design reference, resulting in positioning errors of the moving components. In severe cases, it can even cause jamming or interference, directly leading to equipment "depreciation" and a significant decrease in product processing accuracy. In addition, the additional stress generated by deformation will exacerbate the rigid contact wear between the guide shaft and the support components, not only shortening the replacement cycle of the guide shaft but also potentially triggering a chain of failures, significantly reducing the service life of the entire equipment. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model provides a mold fixing accessory to prevent loosening, thereby solving the problems mentioned in the background art, such as the tendency of excessively long guide shafts to deflect, deform, loosen, and lose precision.
[0006] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a mold fixing accessory for preventing loosening, comprising:
[0007] The support body is a rigid block structure;
[0008] The extension member is a rigid long strip plate structure. The extension member is disposed on the outside of the support body, and one end of the extension member is fixed to the equipment bracket.
[0009] A raised base is fixedly disposed at the center of the support body;
[0010] A guide shaft through hole is provided on the protruding base, and the guide shaft through hole is perpendicular to the support body.
[0011] Preferably, the cross section of the support body perpendicular to the axial direction is a regular octagon.
[0012] Preferably, the extension member has a support body shaped groove corresponding to the support body, the support body is engaged in the support body shaped groove, and the bottom of the support body shaped groove has a clearance hole corresponding to the protruding base.
[0013] Preferably, the support body and the extension have multiple sets of fixing screw holes, and the support body is fixed to the extension by bolts.
[0014] Preferably, the cross-section of the guide shaft through hole perpendicular to the axial direction is rectangular.
[0015] Preferably, the assembly of the support body and the protruding base is provided with multiple sets of dividing notches, which divide the assembly into multiple sets of equal molecular components along the axial direction.
[0016] Preferably, the multiple sets of the equimolar components are distributed in a circumferentially symmetrical manner.
[0017] Preferably, the fixing screw holes are staggered from the dividing notches, and each set of equal molecular components has at least two sets of fixing screw holes.
[0018] Compared with the prior art, this utility model provides a mold fixing accessory to prevent loosening, which has the following beneficial effects:
[0019] This anti-loosening mold fixing accessory is equipped with a support body, an extension, a raised base, and a guide shaft through hole. The extension fixes the entire support body and the raised base to the blind area in the middle of the guide shaft, providing support for the guide shaft. This prevents the excessively long guide shaft from deflecting due to its own weight, load, and pressure from moving parts, thus preventing the guide shaft from deforming and loosening. Furthermore, the support body and the raised base are spliced together from multiple sets of equal molecular components, with small gaps at the splicing points. These gaps can be used as slight strain space for the contact components, which can significantly reduce rigid contact wear without affecting the accuracy of use, preventing guide shaft deformation and misalignment, and greatly improving the stability and service life of the device. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0021] Figure 2 This is a front view of the support body and the protruding base of this utility model;
[0022] Figure 3 This is a schematic diagram of the extension structure of this utility model;
[0023] Figure 4 This is a schematic diagram of the support body and the protruding base structure of this utility model.
[0024] In the figure: 1. Support body; 2. Extension; 3. Protruding base; 4. Guide shaft through hole; 5. Support body groove; 6. Clearance hole; 7. Fixing screw hole; 8. Dividing notch; 9. Equal part. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] Please see Figure 1-4 This utility model provides a technical solution:
[0027] A mold fixing accessory for preventing loosening, comprising:
[0028] Support body 1, which is a rigid block structure;
[0029] Extension 2 is a rigid long strip plate structure. Extension 2 is set on the outside of support body 1, and one end of extension 2 is fixed to the equipment bracket.
[0030] The protruding base 3 is fixedly disposed at the center of the support body 1;
[0031] The guide shaft through hole 4 is disposed on the raised base 3 and is perpendicular to the support body 1. In this application, it is positioned in the middle of the guide shaft's motion blind zone, typically between two sets of moving parts, but can also be positioned at both ends as a regular guide shaft support. When positioned in the middle, it provides support to prevent excessively long guide shafts from deflecting due to their own weight, load, and the pressure of the moving parts, thus preventing loosening of the guide shaft and significantly improving the stability and service life of the device.
[0032] Furthermore, the cross-section of the support body 1 perpendicular to the axial direction is a regular octagon. The regular octagonal structure allows the extension 2 to rotate relative to the support body 1 in eight directions. For different equipment, some equipment has a bracket on the top, so the extension 2 can be connected to the top; some equipment has a bracket on the side, so the extension 2 can be connected to the side. The eight directions greatly improve the ease of installation. It is recommended that the extension 2 be connected to the top to reduce the influence of gravity. The connection method between the extension 2 and the equipment is not limited, and the methods commonly used by those skilled in the art are applicable.
[0033] Furthermore, the extension 2 is provided with a support body groove 5 corresponding to the support body 1, the support body 1 is snapped into the support body groove 5, and the bottom of the support body groove 5 is provided with a clearance hole 6 corresponding to the protruding base 3.
[0034] Furthermore, multiple sets of fixing screw holes 7 are provided on the support body 1 and the extension 2, and the support body 1 is fixed to the extension 2 by bolts.
[0035] Furthermore, the cross-section of the guide shaft through hole 4 perpendicular to the axial direction is rectangular. Rectangular guide shafts are more prone to deflection deformation.
[0036] Furthermore, the assembly of the support body 1 and the raised base 3 is provided with multiple sets of dividing notches 8, which divide the assembly into multiple sets of equal molecular parts 9 along the axial direction. The entire structure is divided into multiple parts, which facilitates modular production, manufacturing, and use. At the same time, small gaps (dividing notches 8) are left to allow slight strain space between each rigid contact component. Without affecting the accuracy of use, it can significantly reduce rigid contact wear, avoid wear and loosening, and significantly improve the service life of the guide shaft and this application.
[0037] Furthermore, the multiple sets of equal molecular components 9 are distributed in a circumferentially symmetrical manner. Circumferential symmetry facilitates assembly and ensures uniform force distribution, preventing any single molecular component from being damaged by excessive force.
[0038] Furthermore, the fixing screw holes 7 are staggered from the dividing notches 8, and each set of equal molecular parts 9 has at least two sets of fixing screw holes 7. At least two sets of fixing screw holes 7 ensure secure fixing.
[0039] Structural Description:
[0040] Support body 1: A rigid block structure with a regular octagonal cross section perpendicular to the axial direction. It is the core load-bearing component of the device and is used to fix the protruding base 3 and connect it to the extension 2.
[0041] Extension 2: A rigid long strip plate structure, located on the outside of the support body 1, with one end fixed to the equipment bracket, used to fix the support body 1 and the protruding base 3 at the corresponding positions of the guide shaft;
[0042] Protruding base 3: A structure fixed to the center of the support body 1, which has a guide shaft through hole 4, which together with the support body 1 forms a support constraint on the guide shaft;
[0043] Guide shaft through hole 4: A hole-like structure set on the raised base 3 and perpendicular to the support body 1. The cross section perpendicular to the axial direction is rectangular, which is used for the guide shaft to pass through and form a nested fit.
[0044] Support body groove 5: A groove-shaped structure opened on the extension 2 and corresponding to the support body 1, for the support body 1 to be snapped into it, so as to achieve the initial positioning of the two;
[0045] 6: A hole-like structure formed at the bottom of the support body groove 5 and corresponding to the protruding base 3, used to provide a space for the protruding base 3 when the support body 1 is engaged, so as to avoid interference;
[0046] Fixed screw holes 7: Multiple sets of hole-like structures are opened on the support body 1 and the extension 2, which cooperate with bolts to fix the support body 1 on the extension 2, and are staggered from the dividing notch 8. Each set of equal molecular parts 9 has at least two sets.
[0047] Dividing notch 8: Multiple notch structures are provided on the joint of support body 1 and protruding base 3, which divide the joint into multiple equal molecular parts 9 along the axial direction, forming small gaps as strain space.
[0048] Equal molecular component 9: Multiple structures formed by the dividing notch 8 are distributed in a circumferential symmetrical manner. After splicing, they form a combination of support body 1 and protruding base body 3, which is convenient for modular production and can distribute the force.
[0049] Working Principle: This anti-loosening mold fixing accessory achieves stable support and deformation suppression of the guide shaft through the coordinated action of multiple components. Its working principle is based on a combination of structural mechanics design and dynamic strain adjustment. The overall device uses the support body 1 as the core load-bearing component. With the fixing effect of the extension 2, the assembly is precisely positioned at the key support point of the guide shaft. At the same time, the cooperation between the protruding base 3 and the guide shaft forms a rigid constraint. Furthermore, the segmented structural design alleviates contact wear, ultimately achieving the functional goals of preventing loosening and resisting deformation.
[0050] During the installation and positioning phase, the device is fixed by connecting the extension 2 to the equipment support: the support groove 5 on the extension 2 and the support body 1 form a snap-fit engagement, and the bolts pass through the fixing screw holes 7 of both to complete the rigid locking, ensuring a stable connection between the assembly and the equipment foundation. The support body 1 adopts a regular octagonal cross-section design, allowing the extension 2 to rotate and adjust in eight directions, adapting to the support installation requirements of different positions such as the top and sides of the equipment. When the device is placed in the middle motion blind zone of the guide shaft between the two sets of moving parts, the guide shaft through hole 4 on the raised base 3 forms a nested engagement with the guide shaft. The rectangular cross-section through hole design can not only adapt to the rectangular guide shaft that is prone to deflection deformation, but also provide uniform support through the surface contact between the hole wall and the shaft body, directly offsetting the downward bending moment generated by the guide shaft due to its own weight and load, and suppressing the tendency of the middle section to sag from the mechanical source.
[0051] During dynamic operation, the device achieves multiple protections through a layered structural design: First, the composite structure formed by the support body 1 and the raised base 3 applies radial constraint to the guide shaft. Utilizing the combined stiffness of the rigid block and raised structure, the deflection deformation of the guide shaft is controlled within a small range, preventing loosening due to excessive deformation. Second, multiple sets of segmented notches 8 divide the composite structure into circumferentially symmetrically distributed equal-sized components 9. The small gaps formed at the joints of these components provide slight strain space for the contact between the guide shaft and the fittings. When the guide shaft undergoes slight deformation due to temperature changes or instantaneous loads, the gaps can absorb some stress, avoiding stress concentration caused by forced constraints in traditional rigid contact, thereby reducing friction and wear between the hole wall and the shaft. At the same time, the symmetrically distributed equal-sized components 9 can evenly distribute the supporting force to the surface of the guide shaft, preventing damage to the shaft or deformation of the fittings caused by excessive local stress.
[0052] Furthermore, the device is adaptable to various scenarios: when installed at both ends of the guide shaft, it functions as a standard guide shaft support, achieving universal fixation through standardized perforation dimensions and installation structures; while when used in the middle blind zone, its core value lies in filling the structural gap of traditional two-end supports, forming a composite support system of "two-end fixation + middle auxiliary support," significantly improving the overall rigidity of long guide shafts. This design avoids the cost increases caused by simply increasing the shaft diameter or using high-strength materials, and extends the service life of the guide shaft and accessories through a dynamic strain adjustment mechanism, ultimately achieving comprehensive optimization of the device in terms of accuracy maintenance, stability improvement, and maintenance cost reduction.
[0053] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A mold fixing accessory for preventing loosening, characterized in that, include: Support body (1), wherein the support body (1) is a rigid block structure; Extension (2), the extension (2) is a rigid long strip plate structure, the extension (2) is disposed on the outside of the support body (1), and one end of the extension (2) is fixed on the equipment bracket; A raised base (3) is fixedly disposed at the center of the support body (1); A guide shaft through hole (4) is provided on the protruding base (3) and the guide shaft through hole (4) is perpendicular to the support body (1).
2. The anti-loosening mold fixing accessory according to claim 1, characterized in that, The support body (1) has a regular octagonal cross section perpendicular to the axial direction.
3. The anti-loosening mold fixing accessory according to claim 2, characterized in that, The extension (2) is provided with a support body groove (5) corresponding to the support body (1), the support body (1) is engaged in the support body groove (5), and the bottom of the support body groove (5) is provided with a clearance hole (6) corresponding to the protruding base (3).
4. The anti-loosening mold fixing accessory according to claim 3, characterized in that, The support body (1) and the extension (2) have multiple sets of fixing screw holes (7), and the support body (1) is fixed to the extension (2) by bolts.
5. The anti-loosening mold fixing accessory according to claim 1, characterized in that, The cross section of the guide shaft through hole (4) perpendicular to the axial direction is rectangular.
6. The anti-loosening mold fixing accessory according to claim 4, characterized in that, The joint of the support body (1) and the protruding base (3) is provided with multiple sets of dividing notches (8), which divide the joint into multiple sets of equal molecular parts (9) along the axial direction.
7. The anti-loosening mold fixing accessory according to claim 6, characterized in that, The multiple sets of equal molecular components (9) are distributed in a circumferentially symmetrical manner.
8. The anti-loosening mold fixing accessory according to claim 6, characterized in that, The fixing screw hole (7) is offset from the dividing notch (8), and each set of equal molecular parts (9) has at least two sets of fixing screw holes (7).