Split bushing for guide post guide bushing

Abstract

The utility model discloses a kind of split bushings for guide column guide sleeve, including guide column, the guide sleeve of being sleeved in the lateral of the guide column and can be axially slid relative thereto, and the guide bushing being set between the guide column and guide sleeve, the guide bushing is split guide bushing, it is composed of at least two along circumferential splicing bushing split body;Limiting structure for being axially positioned to the split guide bushing is provided on the guide column;Reset spring is also sleeved on the guide column, one end of the reset spring and the step surface on the guide column abut, the other end and the end surface of the split guide bushing abut, for the split guide bushing provides axial reset elastic force;Through radial limit and detachable axial locking structure realize quick assembly and maintenance, effectively improve assembly efficiency, structural stability and maintenance convenience, and reduce equipment maintenance cost.

Description

Technical Field

[0001] This utility model relates to the technical field of linear motion guiding mechanisms, specifically a split bushing for guide posts and guide sleeves. Background Technology

[0002] In precision molds such as stamping, injection molding, and die casting, as well as various industrial machinery, the guide pair composed of guide pillars and guide sleeves is a key basic component for achieving precise, stable, and reliable relative movement of moving parts. Its core function is to ensure that the upper and lower molds or moving and stationary parts always maintain precise alignment during mold closing and opening, preventing lateral offset and wear, thereby ensuring product accuracy, mold life, and equipment operation stability.

[0003] Existing guide bushings mostly adopt an integral structure design, which has certain drawbacks in practical applications: First, the integral bushing needs to be inserted and positioned as a whole along the axial direction of the guide post during installation. For guide posts with limiting structures at some ends or long lengths, the installation operation is extremely difficult, and may even require additional processing of the guide post or bushing to complete the assembly, increasing assembly costs and time. Second, when the bushing is damaged and needs to be replaced due to wear, deformation, or other reasons, the integral structure requires the entire guide post and guide bushing mechanism to be disassembled, making it impossible to replace the bushing quickly and individually. This not only results in low maintenance efficiency but may also cause secondary damage to other components such as the guide post and guide bushing.

[0004] Therefore, a split bushing for guide post guide sleeve is proposed to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this utility model is to provide a split bushing for guide post guide sleeves, so as to solve the problems of difficult installation and inconvenient maintenance of the current integral guide bushings mentioned in the background art, which result in high assembly costs and low replacement efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a split bushing for a guide post and guide sleeve, comprising a guide post, a guide sleeve sleeved on the outside of the guide post and slidable relative to its axial direction, and a guide bushing disposed between the guide post and the guide sleeve. The guide bushing is a split guide bushing, which is composed of at least two bushing parts spliced ​​together in the circumferential direction; The guide post is provided with a limiting structure for axially limiting the split guide bushing; A return spring is also fitted on the guide post. One end of the return spring abuts against the stepped surface on the guide post, and the other end abuts against the end face of the split guide bushing, which is used to provide axial return spring force for the split guide bushing. Each bushing component has a mating surface with a mutually cooperating radial limiting structure to prevent relative displacement of the bushing components in the radial direction during circumferential splicing. Each bushing assembly is provided with an axial locking structure on its mating surface, which is used to detachably lock each bushing assembly together in the axial direction to prevent them from sliding relative to each other in the axial direction.

[0007] Preferably, the radial limiting structure includes a guide groove disposed on a bushing split mating surface and a guide key disposed on another bushing split mating surface spliced ​​therewith, the guide key being slidably embedded in the guide groove.

[0008] Preferably, the cross-section of the guide groove and the guide key is dovetail-shaped.

[0009] Preferably, the split guide bushing is composed of a first bushing and a second bushing with the same structure and symmetrically spliced; one end of the mating surface of the first bushing is provided with the guide groove, and the other end is provided with the guide key; the mating surface structure of the second bushing is complementary to that of the first bushing.

[0010] Preferably, the axial locking structure includes a locking groove formed on at least one bushing split mating surface, and a locking block detachably disposed in the locking groove; when the locking block is installed in the locking groove, it simultaneously engages with the mating surfaces of at least two bushing splits.

[0011] Preferably, the locking groove is an arc-shaped dovetail groove, and the shape of the locking block is adapted to it, and it is tightly fitted into the interior of the arc-shaped dovetail groove by means of rotation and snap-fit.

[0012] Preferably, the locking block has a tool operating hole, which is an internal hexagon countersunk hole.

[0013] Preferably, the limiting structure includes an end cap disposed at one end of the guide post and a positioning boss disposed at the other end of the guide post, and the split guide bushing is restricted within the axial space between the return spring and the positioning boss.

[0014] Preferably, the end cap is fixedly connected to the end of the guide post by fastening bolts.

[0015] Preferably, the positioning boss is integrally formed with the guide post, and the outer diameter of the positioning boss is larger than the aperture of the split guide bushing and smaller than the aperture of the guide bushing.

[0016] Compared with the prior art, the beneficial effects of this utility model are: this split bushing for guide posts and guide sleeves achieves rapid assembly and maintenance through radial limiting and detachable axial locking structures, effectively improving assembly efficiency, structural stability, and maintenance convenience, while reducing equipment maintenance costs. The specific details are as follows: Firstly, this invention adopts a split-type guide bushing design, consisting of at least two bushing segments joined circumferentially. These segments, along with a radial limiting structure and a detachable axial locking structure that mate on their mating surfaces, eliminate the need for integral bushings to be fitted along the guide post's axial direction, thus reducing assembly time. This design effectively adapts to scenarios with end-limiting structures or long guide posts, avoiding the need for additional processing of the guide post or bushing for assembly and reducing assembly difficulty. Simultaneously, the radial limiting structure prevents radial relative displacement of the bushing segments during circumferential joining, while the axial locking structure ensures each bushing segment is securely locked axially, guaranteeing structural stability after assembly. Furthermore, the limiting structure on the guide post, in conjunction with a return spring, provides stable axial positioning and return force for the split-type guide bushing, ensuring axial stability and guiding accuracy after assembly.

[0017] Secondly, based on the detachable axial locking structure design, when the guide bushings are worn, deformed, or otherwise damaged, it is not necessary to disassemble the entire guide post and guide bushing mechanism. Only the axial locking structure needs to be disassembled to separate each bushing, enabling individual and rapid replacement. This design effectively solves the problem of low maintenance efficiency during the replacement of existing integral bushings, while avoiding secondary damage to other components such as guide posts and guide bushings during overall disassembly. This improves maintenance convenience and efficiency, and reduces equipment maintenance costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This utility model Figure 1 A schematic diagram of the exploded structure; Figure 3 This utility model Figure 2 Another perspective structural diagram; Figure 4 This is a schematic diagram of the split guide bushing in the splicing state of this utility model; Figure 5 This is a three-dimensional structural diagram of the first bushing in this utility model; Figure 6 This utility model Figure 5 Enlarged structural diagram at point B; Figure 7 This utility model Figure 4Enlarged structural diagram at point A in the middle; Figure 8 This is a three-dimensional structural diagram of the locking block in this utility model.

[0019] In the diagram: 1. Guide post; 2. Fastening bolt; 3. End cap; 4. Return spring; 5. Split guide bushing; 501. First bushing; 502. Second bushing; 503. Guide groove; 504. Guide key; 505. Locking groove; 6. Positioning boss; 7. Guide sleeve; 8. Locking block; 801. Tool operating hole. Detailed Implementation

[0020] 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. Example

[0021] like Figure 1-8 As shown, the present invention provides a split bushing for guide post and guide sleeve, including guide post 1, guide sleeve 7, split guide bushing 5, return spring 4, end cap 3, fastening bolt 2, positioning boss 6 and locking block 8, etc. The components work together to achieve the guiding function, while solving the technical problem of inconvenient disassembly and assembly of traditional integral bushings.

[0022] The guide post 1 is an integral columnar structure. One end has a connecting structure for mounting the end cap 3, and the other end has an integrally formed positioning boss 6. The outer diameter of the positioning boss 6 is larger than the hole diameter of the split guide bushing 5 but smaller than the hole diameter of the guide sleeve 7, which can provide axial limitation for the split guide bushing 5. A stepped surface is also provided on the outer wall of the guide post 1. This stepped surface is used to abut against one end of the return spring 4, providing an installation positioning reference for the return spring 4.

[0023] The split-type guide bushing 5 is the core innovative component, consisting of a first bushing 501 and a second bushing 502 with identical structures and symmetrical splicing. The two-part circumferential splicing design allows for synchronous installation with the guide post 1. On the two mating surfaces of the first bushing 501, one end has a guide groove 503, and the other end has a guide key 504. The mating surface structure of the second bushing 502 is complementary to that of the first bushing 501; that is, the guide key 504 is positioned corresponding to the guide groove 503 of the first bushing 501, and the guide groove 503 is positioned corresponding to the guide key 504 of the first bushing 501. The mating cross-section of the guide groove 503 and the guide key 504 is dovetail-shaped, forming a radial limiting structure. This effectively prevents relative radial displacement of the two bushings when they are circumferentially spliced, ensuring the structural stability after splicing.

[0024] A locking groove 505 is provided on the mating surface of the first bushing 501 and the second bushing 502. The locking groove 505 is an arc-shaped dovetail groove. The locking block 8 that is adapted to it can be tightly fitted into the arc-shaped dovetail groove by rotation and snap-fit. The locking groove 505 and the locking block 8 form an axial locking structure. A tool operating hole 801 is provided on the locking block 8. The tool operating hole 801 is an internal hexagon countersunk hole, which facilitates the installation and removal of the locking block 8 with an internal hexagon tool, thereby realizing the axial detachable locking of the first bushing 501 and the second bushing 502 and preventing relative sliding between the two in the axial direction.

[0025] The return spring 4 is sleeved on the outside of the guide post 1, with one end abutting against the stepped surface on the guide post 1 and the other end abutting against the end face of the split guide bushing 5, providing continuous axial return force for the split guide bushing 5. The guide sleeve 7 is sleeved on the outside of the guide post 1 and located outside the split guide bushing 5, and can slide axially relative to the guide post 1, realizing the core guiding function of the guide post and guide sleeve. The end cap 3 is fixedly connected to the end of the guide post 1 by the fastening bolt 2, and together with the positioning boss 6, it forms a limiting structure, providing axial limitation for the split guide bushing 5 and the return spring 4.

[0026] The assembly process of this embodiment is as follows. It should be noted that the splicing of the split guide bushing 5 and its fitting onto the outside of the guide post 1 are carried out simultaneously: Pre-processing: Check the dimensional accuracy and surface finish of each component to ensure that the mating surfaces of the guide groove 503, guide key 504, locking groove 505 and locking block 8 are free of burrs and impurities; prepare assembly auxiliary tools such as internal hexagonal tools.

[0027] Reset spring installation: Sleeve the reset spring 4 on the outside of the guide post 1, so that one end of the reset spring 4 is in close contact with the stepped surface on the guide post 1, ensuring that the reset spring 4 is in a naturally extended state or a preset pre-compressed state.

[0028] Synchronous splicing and fitting of split guide bushings: Take the first bushing 501 and the second bushing 502, and place them on both sides of the corresponding installation position of the guide post 1, so that the guide groove 503 of the first bushing 501 is aligned with the guide key 504 of the second bushing 502, and the guide key 504 of the first bushing 501 is aligned with the guide groove 503 of the second bushing 502. Then, while moving the two bushings towards the outside of the guide post 1, push the two bushings to fit together along the mating surface, so that the guide key 504 slides smoothly into the guide groove 503, until the two bushings are completely spliced ​​to form a complete split guide bushing 5, and the split guide bushing 5 is fitted on the outside of the guide post 1 and tightly abuts against the other end of the return spring 4. At this time, the other end of the split guide bushing 5 is opposite to the positioning boss 6 of the guide post 1, and the axial positioning is initially completed.

[0029] Axial locking: Align the locking block 8 with the locking groove 505 on the mating surface of the split guide bushing 5. Insert an Allen wrench into the tool operating hole 801 of the locking block 8, and rotate the locking block 8 to make it fit tightly inside the arc-shaped dovetail groove through rotational snap-fit. After the locking block 8 is installed, it engages with the mating surfaces of the first bushing 501 and the second bushing 502, realizing the axial detachable locking of the two bushings and preventing them from sliding relative to each other.

[0030] End cap installation: Attach the end cap 3 to the end of the guide post 1 that has the connecting structure, and secure the end cap 3 with the fastening bolts 2. The installation position of the guide post 1 can be fixed by the cooperation between the end cap 3 and the guide post 1.

[0031] Guide sleeve assembly: The guide sleeve 7 is fitted onto the outside of the guide post 1 from the end of the guide post 1 with the positioning boss 6, so that the inner side wall of the guide sleeve 7 fits against the outer side wall of the split guide bushing 5, ensuring that the guide sleeve 7 can slide smoothly axially relative to the guide post 1 and the split guide bushing 5, thus completing the entire assembly process of the device.

[0032] Working principle: Before using this type of split bushing for guide posts and guide sleeves, it is necessary to check the overall condition of the device to ensure it can operate normally. Figure 1 - Figure 8 As shown, during the operation of the guide post and guide sleeve, the guide sleeve 7 slides along the axial direction of the guide post 1 and the split guide bushing 5. The split guide bushing 5 provides precise guiding support for the guide sleeve 7, ensuring the smoothness and coaxiality of the sliding process. When the guide sleeve 7 exerts an axial force on the split guide bushing 5 during the sliding process, the return spring 4 is compressed and generates a reverse axial return force. After the force on the guide sleeve 7 disappears, the return spring 4 can push the split guide bushing 5 to quickly return to its initial position.

[0033] Throughout the entire operation, the radial limiting structure and axial locking structure of the split guide bushing 5 jointly ensure its overall stability: the dovetail-shaped guide groove 503 and guide key 504 can effectively resist radial shear force and prevent relative displacement of the first bushing 501 and the second bushing 502 in the radial direction; the rotating snap-fit ​​structure of the arc-shaped dovetail groove and the locking block 8 can reliably lock the axial position of the two bushings, preventing them from sliding relative to each other under axial force. At the same time, the limiting structure formed by the positioning boss 6 and the end cover 3 can prevent excessive axial displacement of the split guide bushing 5 and the return spring 4, ensuring the reliability of the coordinated operation of each component.

[0034] When the split guide bushing 5 needs to be repaired or replaced, simply rotate the locking block 8 in the opposite direction using an Allen wrench to remove the locking block 8 from the locking groove 505, releasing the axial locking of the two bushings. Then the first bushing 501 and the second bushing 502 can be removed from the guide post 1 respectively, without having to disassemble the entire guide post 1 and guide sleeve 7. This greatly simplifies the disassembly and assembly process and reduces maintenance costs.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A split bushing for a guide post and guide sleeve, comprising a guide post (1), a guide sleeve (7) sleeved on the outside of the guide post (1) and slidable relative to it axially, and a guide bushing disposed between the guide post (1) and the guide sleeve (7), characterized in that: The guide bushing is a split guide bushing (5), which is composed of at least two bushing parts spliced ​​together in the circumferential direction; The guide post (1) is provided with a limiting structure for axially limiting the split guide bushing (5); A return spring (4) is also sleeved on the guide post (1). One end of the return spring (4) abuts against the stepped surface on the guide post (1), and the other end abuts against the end face of the split guide bushing (5), which is used to provide axial return elastic force for the split guide bushing (5). Each bushing component has a mating surface with a mutually cooperating radial limiting structure to prevent relative displacement of the bushing components in the radial direction during circumferential splicing. Each bushing assembly is provided with an axial locking structure on its mating surface, which is used to detachably lock each bushing assembly together in the axial direction to prevent them from sliding relative to each other in the axial direction.

2. A split bushing for guide post bushings according to claim 1, characterized in that: The radial limiting structure includes a guide groove (503) on one bushing split mating surface and a guide key (504) on another bushing split mating surface spliced ​​therewith, the guide key (504) being slidably embedded in the guide groove (503).

3. A split bushing for guide post bushing according to claim 2, characterized in that: The cross-section of the guide groove (503) and the guide key (504) is dovetail-shaped.

4. A split bushing for a guide post / guide sleeve according to claim 3, characterized in that: The split guide bushing (5) is composed of a first bushing (501) and a second bushing (502) with the same structure and symmetrically spliced; the first bushing (501) has a guide groove (503) at one end of its mating surface and a guide key (504) at the other end; the mating surface structure of the second bushing (502) is complementary to that of the first bushing (501).

5. A split bushing for a guide post / guide sleeve according to claim 1, characterized in that: The axial locking structure includes a locking groove (505) formed on at least one bushing split mating surface, and a locking block (8) detachably disposed in the locking groove (505); when the locking block (8) is installed in the locking groove (505), it simultaneously engages with at least two mating surfaces of the bushing split.

6. A split bushing for a guide post / guide sleeve according to claim 5, characterized in that: The locking groove (505) is an arc-shaped dovetail groove, and the locking block (8) is adapted to it and fits tightly inside the arc-shaped dovetail groove by means of rotation and snap-fit.

7. A split bushing for a guide post / guide sleeve according to claim 6, characterized in that: The locking block (8) is provided with a tool operation hole (801), which is an internal hexagon countersunk hole.

8. A split bushing for a guide post / guide sleeve according to claim 1, characterized in that: The limiting structure includes an end cap (3) disposed at one end of the guide post (1) and a positioning boss (6) disposed at the other end of the guide post (1). The split guide bushing (5) is restricted in the axial space between the reset spring (4) and the positioning boss (6).

9. A split bushing for a guide post / guide sleeve according to claim 8, characterized in that: The end cap (3) is fixedly connected to the end of the guide post (1) by fastening bolts (2).

10. A split bushing for a guide post / guide sleeve according to claim 8, characterized in that: The positioning boss (6) is integrally formed with the guide post (1), and the outer diameter of the positioning boss (6) is larger than the hole diameter of the split guide bushing (5) and smaller than the hole diameter of the guide sleeve (7).

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