A sleeve mounting mold with automatic adjustment

Abstract

The utility model relates to mould technical field, concretely is a sleeve installation mould with automatic adjustment, including sleeve positioning seat, sleeve centering subassembly and guide piece. The surface of sleeve positioning seat is fixed with fixed seat for connecting with the head of pressure equipment machine, its inside rotation sleeve joint has the adjusting axle rod, the one end of adjusting axle rod is equipped with screw rod, and is connected with the screw pipe screw thread of guide piece inside. Sleeve centering subassembly includes sliding sleeve spare, several wedge rods and expanded ear, and the surface of sliding sleeve spare is equipped with inclined wedge groove, and wedge rod is arranged along the radial direction and is slid with inclined wedge groove and abuts, and the axial movement of sliding sleeve spare drives wedge rod radial ejection, and drives expanded ear to unfold to support sleeve port. Guide piece includes sliding pipe and the several guide feet of outer periphery, and the surface of guide foot is equipped with deformation gap. The utility model realizes automatic centering and radial adjustable ejection function, and precision and efficiency of sleeve assembly have been improved significantly, and are applicable to the quick installation of multi -specification sleeve.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to a sleeve installation mold with automatic adjustment. Background Technology

[0002] Currently, in the production and assembly of engines, hydraulic cylinders, and high-precision shaft parts, it is often necessary to press-fit wear-resistant sleeves or sealing bushings onto the outer surface of the shaft to improve the wear resistance and sealing performance of the part surface. Traditional sleeve installation methods typically employ manual positioning or simple fixed mold structures for assembly. These structures mainly include a fixed base, a press-fit shaft, and a limiting retaining ring. After manually adjusting the concentricity of the sleeve and shaft, an axial pressure is applied by a press-fitting machine to complete the fitting.

[0003] However, the following prominent problems exist in the existing technology: (1) Traditional installation devices mostly use fixed guide sleeves or rigid limit blocks for positioning, lacking automatic self-aligning or flexible guide structures, which makes it difficult for the sleeve and the axis to be automatically aligned. The manual correction steps are cumbersome and easily cause coaxiality deviation, affecting the subsequent assembly accuracy.

[0004] (2) When the diameter of the sleeve and the shaft are significantly different, the existing mold usually needs to be replaced with guide parts or pads of different sizes. It is impossible to adjust through structural self-adaptation. The adjustment process is complicated and inefficient, which affects the continuous operation of the production line.

[0005] (3) Although some devices with adjustment mechanisms can achieve stroke control through screws or sliders, their centering structure is mostly single-point rigid positioning, which fails to achieve radial multi-point synchronous support, and is prone to sleeve sway or press-fit tilting.

[0006] Therefore, existing sleeve installation equipment still has significant shortcomings in terms of centering automation, radial support accuracy, and multi-specification adaptability, and cannot simultaneously achieve both high precision and versatility. Utility Model Content

[0007] This invention aims to solve the technical problems of centering difficulties, low installation accuracy, and inability to automatically adapt to different sleeve specifications in existing sleeve installation devices, and provides a sleeve installation mold with automatic adjustment. This mold, through the linkage design of an automatic centering structure and an adjustable ejection mechanism, achieves automatic coaxial positioning and multi-specification adaptive adjustment during sleeve assembly, thereby improving pressing accuracy and assembly efficiency.

[0008] This utility model provides a sleeve installation mold with automatic adjustment, including a sleeve positioning seat, a sleeve centering assembly, and a guide. The sleeve positioning seat provides an installation reference and press-fit support for the entire structure, the sleeve centering assembly realizes automatic centering and radial limiting of the sleeve to be installed, and the guide is used to guide and automatically fit the sleeve during installation.

[0009] The mold is constructed from a sleeve positioning seat, a sleeve centering assembly, and a guide. An adjusting shaft is installed inside the sleeve positioning seat, and a sliding assembly is driven by a threaded structure to achieve axial movement. The sliding assembly drives multiple wedges to move radially along the inclined wedge grooves, thereby causing the expansion lug to be ejected radially, achieving the positioning and limiting of the sleeve to be installed. Simultaneously, multiple guide feet are evenly distributed on the outer circumference of the guide, and the surface of the guide feet has deformation gaps, allowing for automatic deformation during sleeve insertion and achieving automatic centering. Through the above-mentioned linkage structure, this invention realizes a continuous action chain of "axial adjustment—radial ejection—automatic centering".

[0010] In a preferred embodiment, a fixed seat is fixedly fitted onto the surface of the sleeve positioning seat for connection with the press head of the press machine, ensuring the overall stability and positioning accuracy of the mold during installation. An adjusting shaft is rotatably fitted onto the inner side of the sleeve positioning seat, used to achieve precise displacement of the internal transmission components via a screw drive, thereby controlling the operating pitch of the centering component.

[0011] Specifically, one end of the adjusting shaft is equipped with a screw, which passes through the sliding assembly and is threadedly connected to the threaded tube. By adjusting the rotation of the screw, the sliding assembly can be driven to move back and forth in the axial direction, realizing radial ejection control of the wedge rod and ensuring the synchronous coordination of the structure during operation. The specific effect of this structure is that it can realize the automatic adjustment of multiple specifications of sleeves, avoiding the need to change molds.

[0012] In a preferred embodiment, the sleeve centering assembly includes a sliding element, several wedges, and an expansion lug. The sliding element surface is provided with inclined wedge grooves, and the wedges are radially distributed and slidably abut against the inclined wedge grooves. When the sliding element moves axially under the drive of the adjusting shaft, the wedges are radially ejected by the inclined wedge grooves, causing the expansion lug to extend outward, thus limiting and preventing the sleeve end from slipping. Specifically, this structure, through the inclined surface cooperation between the wedges and the sliding element, enables a mechanical conversion between radial and axial motion, ensuring smooth and reliable ejection.

[0013] In a preferred example, a spring is fitted at the rear end of the sliding assembly, with one end of the spring abutting the end of the adjusting shaft and the other end abutting the rear end face of the sliding assembly. The spring provides a restoring force when the adjusting shaft rotates in the opposite direction, causing the sliding assembly and wedge to automatically retract and the expansion lug to automatically contract, thereby enabling the device to be used repeatedly and quickly reset. Specifically, this structure ensures rapid recovery of the mold after use, improving continuous operation efficiency.

[0014] In a preferred embodiment, the guide includes a slide tube and guide feet evenly distributed around the outer periphery of the slide tube. A threaded tube is provided inside the slide tube for fitting onto the surface of the screw. Through threaded transmission, the slide tube can move axially synchronously with the screw, causing the guide feet to move along the pressing direction, forming a flexible guide path. The outer periphery of the guide feet has a beveled structure and several deformation gaps. When the guide feet are pressed by the inner wall of the sleeve, they can undergo radial elastic deformation, automatically centering themselves on the inner wall of the sleeve. Specifically, this structure achieves automatic coaxial positioning of the sleeve and the mold's central axis, improving assembly accuracy.

[0015] In a preferred example, several wedges are arranged radially and slide against the inclined wedge grooves on the surface of the sliding element. An expansion lug is embedded in the front end face of the sleeve positioning seat and movably connected to one end of the wedge. Through the axial advancement of the sliding element, the wedges and expansion lugs work together to expand radially, creating a limit on the sleeve end and preventing backlash and displacement during press-fitting. Specifically, this structure improves the press-fitting stability and stress uniformity of the sleeve.

[0016] In a preferred example, a threaded transmission structure is used between the adjusting shaft and the screw and the solenoid. The rotation of the adjusting shaft drives the solenoid to move back and forth axially, thereby achieving synchronous adjustment of the sliding assembly and the wedge. Specifically, the technical advantages of this structure are: sleeves of different diameters can be flexibly adapted by adjusting the rotation angle, without changing molds or adjusting parts, enabling rapid assembly of workpieces of various specifications.

[0017] The beneficial effects achieved by this utility model are as follows: 1. In this utility model, by setting guide feet and deformation gaps around them, the guide feet can generate elastic deformation and automatically fit against the inner wall of the sleeve during the sleeve pushing process, thereby realizing automatic centering of the sleeve to be installed, so that the sleeve is automatically adjusted to be concentric with the central axis of the mold before assembly, thus improving assembly accuracy and stability.

[0018] 2. In this utility model, by adjusting the threaded engagement structure of the shaft and its end screw and the screw tube, the sliding sleeve can be driven to move forward along the axial direction, thereby controlling the ejection amount of the wedge rod and the expansion lug. It can be flexibly adjusted according to the sleeve with different diameters or wall thicknesses, adapting to workpieces of various specifications, and achieving precise positioning and reliable pressing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model; Figure 2 This is a cross-sectional structural diagram of one embodiment of the present invention; Figure 3 This is a schematic diagram of the sleeve centering assembly structure according to an embodiment of the present invention; Figure 4 This is an exploded structural diagram of the adjusting shaft, sliding assembly, and guide member according to one embodiment of the present invention; Figure 5 This is a schematic diagram of the guide structure according to an embodiment of the present invention.

[0020] Figure label: 100. Sleeve positioning seat; 110. Fixed seat; 120. Adjusting shaft; 121. Screw; 200. Sleeve centering assembly; 210. Sliding assembly; 220. Wedge rod; 230. Expansion lug; 211. Angled wedge groove; 212. Spring; 300, guide; 310, slide tube; 320, guide foot; 311, solenoid; 321, deformation gap. Detailed Implementation

[0021] 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 specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0022] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of this invention.

[0023] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a sleeve installation mold with automatic adjustment.

[0024] Combination Figures 1-5 As shown, the present invention provides a sleeve installation mold with automatic adjustment, including a sleeve positioning seat 100, a sleeve centering assembly 200 and a guide 300.

[0025] A fixing seat 110 is fixedly sleeved on the surface of the sleeve positioning seat 100. The fixing seat 110 is used to connect with the press head of the press machine, thereby keeping the entire mold fixed and stable under force during the press operation. An adjusting shaft 120 is rotatably sleeved on the inner side of the sleeve positioning seat 100, which is used to drive the internal transmission structure to make axial adjustments.

[0026] The sleeve centering assembly 200 includes a sliding element 210, several wedge rods 220, and expansion lugs 230. The surface of the sliding element 210 has several axially distributed inclined wedge grooves 211. Each wedge rod 220 is radially arranged and slides against the inclined wedge grooves 211 on the surface of the sliding element 210. One end of each wedge rod 220 is movably connected to an expansion lug 230, which is used for radial ejection during sleeve assembly to limit and support the end of the sleeve. One end of the adjusting shaft 120 is provided with a screw 121 that passes through the sliding element 210, used to drive the sliding element 210 to move axially, thereby causing the wedge rods 220 and expansion lugs 230 to radially expand and contract.

[0027] The guide 300 includes a slide tube 310 and a plurality of guide feet 320 arranged on the outer periphery of the slide tube 310. The inner side of the slide tube 310 is provided with a threaded tube 311 that sleeves onto the surface of the screw rod 121, for threaded transmission engagement with the adjusting shaft 120. When the adjusting shaft 120 rotates, the threaded tube 311 can move forward or backward axially, thereby realizing the back-and-forth movement of the guide 300.

[0028] In this embodiment, the surface of the sleeve positioning seat 100 is provided with a groove for guiding the slide tube 310 and the guide foot 320 to slide axially. A plurality of guide feet 320 are evenly distributed circumferentially along the outer periphery of the slide tube 310, and the outer circumferential surface of the guide feet 320 is a beveled structure to form an adaptive pressing fit when entering the sleeve. Through this structure, the distance between the guide foot 320 and the inner wall of the sleeve can be automatically adjusted during the sleeve pushing and installation process, achieving automatic centering and flexible fit.

[0029] In this embodiment, the surface of the guide foot 320 is provided with a plurality of deformation gaps 321, which are staggered to allow the guide foot 320 to undergo elastic deformation in the radial direction, thereby realizing the automatic expansion and contraction of the guide foot 320 inside the sleeve, so that it can be automatically centered and ensure that the sleeve and the central axis of the mold are concentric.

[0030] In this embodiment, one end of the sliding assembly 210 is provided with a wedge groove 211, and the end of the wedge groove 211 elastically abuts against the end of the adjusting shaft 120 to form an adjustable limiting structure. The screw 121 slides through the inner side of the sliding assembly 210 and is threadedly connected to the screw tube 311. When the adjusting shaft 120 rotates, it can drive the screw tube 311 to generate axial displacement, thereby realizing the forward and backward control of the guide 300 and the synchronous movement of the wedge 220.

[0031] Furthermore, several wedge rods 220 are radially distributed and form a sliding engagement with the inclined wedge groove 211 on the surface of the sliding assembly 210. One end of each wedge rod 220 is movably connected to the expansion lug 230, which is embedded in the front end face of the sleeve positioning seat 100. When the sliding assembly 210 moves forward under the drive of the adjusting shaft 120, the wedge rod 220 is pushed outward along the inclined wedge groove 211, causing the expansion lug 230 to extend radially, thus blocking and limiting the end of the sleeve.

[0032] In this embodiment, a spring 212 is fitted at the rear end of the sliding assembly 210. One end of the spring 212 abuts against the end of the adjusting shaft 120, and the other end abuts against the rear end face of the sliding assembly 210. The spring 212 is used to push the sliding assembly 210 to automatically reset when the adjusting shaft 120 retracts in the reverse direction, so that the wedge 220 and the expansion lug 230 automatically retract radially, thereby realizing the reuse and quick reset of the components.

[0033] In this embodiment, the adjusting shaft 120 and the screw 121 are connected to the screw tube 311 by a threaded connection to form a transmission engagement. When the adjusting shaft 120 rotates, the screw tube 311 moves forward or backward along the axial direction, thereby driving the sliding sleeve 210 to move synchronously, thereby controlling the ejection distance of the wedge 220 and the expansion lug 230 to adapt to sleeves of different diameters and realize adaptive installation of workpieces of various specifications.

[0034] Working principle and usage process of this utility model: During sleeve installation, the sleeve positioning seat 100 of this invention is first connected to the press head of the press machine via the fixing seat 110 to stabilize the entire device. The adjusting shaft 120 can be rotatably installed inside the sleeve positioning seat 100, and its end screw 121 is threadedly connected to the threaded tube 311 inside the guide 300 to drive the guide 300 to perform axial forward and backward movement.

[0035] Before installing the sleeve, align one end of the sleeve to be installed with the guide 300 and slowly push it in. Under the thrust of the outer sleeve, the guide feet 320 undergo a slight radial deformation. Several guide feet 320 are evenly distributed on the outer periphery of the slide tube 310. Under the elastic buffering effect of the deformation gap 321, the guide feet 320 form a sliding contact with the inner wall surface of the sleeve, achieving automatic centering. At this time, the inclined structure of the guide feet 320 can finely adjust the contact position according to the diameter of the sleeve, so that the sleeve is automatically centered on the central axis of the device.

[0036] As the sleeve continues to advance forward, the slide tube 310 and the screw tube 311 drive the sliding assembly 210 to slide along the axial direction of the adjusting shaft 120. The inclined wedge groove 211 on the surface of the sliding assembly 210 slides and engages with multiple wedge rods 220, causing the wedge rods 220 to move radially outward. One end of the wedge rod 220 drives the expansion lug 230 to push outward simultaneously. The front end face of the expansion lug 230 fits against the sleeve port to form a limiting structure, thereby effectively preventing the sleeve from axially retracting during the sleeve pressing process.

[0037] Furthermore, the adjusting shaft 120 can be rotated manually or electrically. Its end screw 121, through threaded engagement, drives the threaded tube 311 forward, further propelling the sliding assembly 210 forward. This allows the wedge rod 220 to generate a larger radial ejection under the guidance of the inclined wedge groove 211, thereby adjusting the support distance of the expansion lug 230 to accommodate sleeves of different diameters. At this time, the relative sliding between the wedge rod 220 and the sliding assembly 210 ensures the synchronization and stability of the ejection action.

[0038] Throughout the entire process, the axial movement of the sliding element 210 and the radial ejection of the wedge 220 form a linkage mechanism. The elastic deformation of the guide foot 320 achieves automatic centering, and the limiting function of the expansion lug 230 prevents the sleeve from slipping. By adjusting the rotation control of the shaft 120 and the screw 121, adaptive installation and high-precision centering of multi-specification sleeves can be achieved, thereby significantly improving the alignment accuracy and assembly efficiency of the press-fitting operation.

[0039] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] Although embodiments of the present invention have been shown and described, those skilled in the art will understand 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 claims and their equivalents.

Claims

1. A sleeve installation mold with automatic adjustment, characterized in that, Includes a sleeve positioning seat (100), a sleeve centering assembly (200), and a guide (300); The sleeve positioning seat (100) is fixedly sleeved with a fixing seat (110) for connection with the press head; the inner side of the sleeve positioning seat (100) is rotatably sleeved with an adjusting shaft (120); the sleeve centering assembly (200) includes a sliding part (210), several wedges (220), and an expansion lug (230). The surface of the sliding part (210) is provided with a wedge groove (211), and the several wedges (220) are arranged radially and are connected to the sliding part (110). The inclined wedge groove (211) on the surface of 210 slides against the lug (230), and the expansion lug (230) is rotatably installed on one end of the wedge rod (220); one end of the adjusting shaft (120) is provided with a screw (121) that passes through the sliding sleeve (210); the guide (300) includes a slide tube (310) and a plurality of guide feet (320) arranged on the outer periphery of the slide tube (310), and the inner side of the slide tube (310) is provided with a screw tube (311) sleeved on the surface of the screw (121).

2. The sleeve installation mold with automatic adjustment according to claim 1, characterized in that, The sleeve positioning seat (100) has a groove on its surface for guiding the slide tube (310) and guide foot (320) to slide axially. The guide foot (320) is evenly distributed on the outer periphery of the slide tube (310) in a circumferential direction, and the outer periphery of the guide foot (320) has an inclined structure.

3. The sleeve installation mold with automatic adjustment according to claim 1, characterized in that, The surface of the guide foot (320) is provided with a plurality of deformation gaps (321), and the plurality of deformation gaps (321) are staggered.

4. The sleeve installation mold with automatic adjustment according to claim 1, characterized in that, One end of the sliding assembly (210) is provided with a wedge groove (211), and the end of the wedge groove (211) elastically abuts against the end of the adjusting shaft (120); the screw (121) slides through the inner side of the sliding assembly (210) and is threadedly connected to the screw tube (311).

5. The sleeve installation mold with automatic adjustment according to claim 1, characterized in that, Several of the wedge rods (220) are arranged radially and slide against the inclined wedge grooves (211) on the surface of the sliding assembly (210). The expansion lugs (230) are embedded in the front end face of the sleeve positioning seat (100) and are movably connected to one end of the wedge rods (220).

6. The sleeve installation mold with automatic adjustment according to claim 5, characterized in that, A spring (212) is fitted at the rear end of the sliding assembly (210). One end of the spring (212) abuts against the end of the adjusting shaft (120), and the other end abuts against the rear end face of the sliding assembly (210).

7. The sleeve installation mold with automatic adjustment according to claim 1, characterized in that, The adjusting shaft (120) and screw (121) drive the screw tube (311) to move forward axially by rotating.

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