Coaxial double bushing outer press-in bushing presser
By designing a coaxial double bushing external press-fit bushing clamping device, a simplified pressing operation of the coaxial double bushing is achieved by utilizing the combination structure of the guide shaft and the guide sleeve. This solves the problem of cumbersome procedures in the existing technology, reduces costs, and ensures accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGXI HONGDU AVIATION IND GRP
- Filing Date
- 2025-07-24
- Publication Date
- 2026-07-24
AI Technical Summary
In the existing technology, the clamping process of coaxial double bushings is cumbersome, requiring two sets of tooling to be used alternately, resulting in complicated operation and high cost.
Design a coaxial double bushing external press-fit bushing clamping device, which adopts a combination structure of guide shaft, hexagonal nut, one-way thrust ball bearing, top block, guide sleeve and washer, so as to realize the clamping work of double bushing with one set of tooling. The guide shaft and guide sleeve are used for positioning to prevent bushing rotation and wear of parts.
It simplifies the operation process, saves working time, reduces tooling manufacturing costs, and ensures a tight clamping effect with high coaxiality accuracy.
Smart Images
Figure CN224543745U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of tooling design schemes for bushing clamps, specifically, it relates to a coaxial double bushing external press-in bushing clamp. Background Technology
[0002] A certain model has a large number of coaxial double bushing external press-fit bushing clamping tasks. The bushing clamping status is shown in the attached document. Figure 1 (Named: Front Bushing 5, Part 6, and Rear Bushing 10), the bushing step is located outside the part. A bushing clamping device is needed to press the coaxial double bushings into the bushing hole from outside the part, ensuring coaxiality accuracy. Currently, two sets of bushing clamping device fixtures are used. First, the first set of fixtures is used to clamp the front bushing, then the second set is used to clamp the rear bushing using the front bushing hole as a guide. This results in numerous bushing clamping steps and cumbersome fixture changes. To simplify the process and reduce the use of fixtures, this application proposes a coaxial double bushing external pressing bushing clamping device design to simplify operation, save working time, reduce fixture manufacturing costs, and enable a single bushing clamping device to complete the clamping of the coaxial double bushings. Therefore, the bushing clamping device for this type of bushing requires further optimization design. Utility Model Content
[0003] The purpose of this utility model is to address the need for simplified operation, reduced working time, and lower tooling manufacturing costs in a coaxial double bushing external press-in bushing clamping device. This involves analyzing the press-in state of the bushing and existing design schemes, optimizing and improving the existing design schemes, and enabling a single bushing clamping device to complete the pressing work of coaxial double bushings, thereby providing a coaxial double bushing external press-in bushing clamping device.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a coaxial double-shoulder external press-fit bushing clamping device, comprising a guide shaft, a hexagonal nut, a top block, a guide sleeve, a thick washer, and a thin washer. Two hexagonal nuts and two guide sleeves are provided. The guide shaft is a stepped shaft with a smooth rod in the middle and threaded rods at both ends. The top block, guide sleeve, thick washer, and thin washer are all rotary shafts with a through hole in the middle. The two guide sleeves are respectively fitted onto the two ends of the smooth rod of the guide shaft. One hexagonal nut and one top block are fitted onto one end of the guide shaft, and both are located at one end. On the outside of the guide sleeve, the hexagonal nut is located on the outside of the top block. The thick washer, the thin washer, and another hexagonal nut are fitted on the other end of the guide shaft, and are all located on the outside of the guide sleeve at the other end. The thin washer is located between the thick washer and the other hexagonal nut. The parts that need to be pressed into the bushing are fitted onto the two guide sleeves through the bushing holes on them, and the end face of the part facing outward is flush with the end face of the guide sleeve facing outward. The bushing is fitted onto the smooth rod of the guide shaft, and the end face of the bushing on the side where it is pressed in is in contact with the end face of the top block, and the end face of the other end is in contact with the end face of the part facing outward.
[0005] Furthermore, two hexagonal nuts are respectively fitted onto the threaded rods at the left and right ends of the guide shaft.
[0006] Furthermore, a one-way thrust ball bearing is provided between the top block and the hexagonal nut, and the one-way thrust ball bearing is sleeved on the threaded rod.
[0007] Furthermore, the bore diameter of the one-way thrust ball bearing is matched with the outer diameter of the threaded rods at both ends of the guide shaft.
[0008] Furthermore, the diameter of the threaded hole of the hexagonal nut matches the outer diameter of the threaded rods at both ends of the guide shaft.
[0009] Furthermore, the outer diameter of the polished rod matches the diameter of the bushing hole and the diameter of the guide sleeve hole.
[0010] Furthermore, the outer diameter of the guide sleeve matches the diameter of the bushing hole in the part.
[0011] Furthermore, the diameter of the through hole in the middle of both the thick and thin washers is larger than the outer diameter of the guide shaft.
[0012] Furthermore, the diameter of the through hole in the middle of the top block is larger than the outer diameter of the guide shaft.
[0013] In this utility model, the bushing includes a front bushing and a rear bushing. When installing the front bushing, the front bushing is fitted onto the left end of the guide shaft's guide rod. The end face of the front bushing on the side that is pressed in is flush with the end face of the left end of the guide rod, and one end face is in contact with the part. The other end face is in contact with one end of the top block, and the other end of the top block is in contact with the one-way thrust ball bearing. The thick washer and thin washer located at the other end of the guide shaft are fixed by the hexagonal nut on the same side. Tighten the hexagonal nut located on the front bushing side to press the front bushing into the bushing hole of the part, thereby achieving the pressing operation of the front bushing. After the front bushing is installed, the components on the left and right sides of the front bushing are swapped, and the front bushing installation steps are repeated. That is, after removing the components on the left and right sides of the front bushing (i.e., the top block, one-way thrust ball bearing, and hexagonal nut located at the left end of the front bushing are swapped with the top block located at the right end of the front bushing), the components on the left and right sides of the front bushing are swapped. Remove the guide sleeve, the guide sleeve containing the part, the thick washer, the thin washer, and the hexagonal nut. Install the guide sleeve containing the part, the rear bushing, the top block, the one-way thrust ball bearing, and one of the hexagonal nuts sequentially on the right end of the guide shaft. The end face of the rear bushing on the pressing side is flush with the end face of the right end of the polished rod, and one end face of the rear bushing is in contact with the part, while the other end face is in contact with one end of the top block. The other end of the top block is in contact with the one-way thrust ball bearing. Install the thick washer, the thin washer, and another hexagonal nut sequentially on the left end of the guide shaft. One end of the thick washer is in contact with the front bushing, and the other end is in contact with one end of the thin washer. The other end of the thin washer is in contact with the other hexagonal nut. The thick and thin washers are fixed by the hexagonal nuts on the same side. Tightening the hexagonal nut on one side of the rear bushing achieves the pressing of the rear bushing, thus completing the pressing of the coaxial double bushings.
[0014] In this utility model, firstly, to prevent the bushing from rotating and wearing down the parts when the bushing is pressed into the rotating nut, a one-way thrust ball bearing is added to prevent the bushing from rotating, as shown in the attached... Figure 2 The diagram illustrates the front bushing clamping installation, with a one-way thrust ball bearing installed on one side of the front bushing clamping direction. Then, considering the need to install two bushings with one bushing clamp, the guide shaft is designed and analyzed. The guide shaft ensures the coaxiality of the two bushing installations and utilizes the bushing holes for positioning. To achieve a shared guide shaft for both bushing installations, positioning is achieved through the cooperation of the guide shaft and the guide sleeve. The installation method is as follows... Figure 2 As shown. Finally, the rear bushing clamping operation is achieved using existing components, as shown in the attached diagram. Figure 3 Diagram of rear bushing clamping installation. The front bushing hole is used as a positioning reference, and the rear bushing is clamped by tightening the nut.
[0015] The beneficial effects of this utility model are as follows:
[0016] 1. When tightening the bushing, it can prevent the bushing from rotating and wearing down the parts when the bushing is pressed into the rotating nut.
[0017] 2. This utility model enables a single bushing clamping device to complete the clamping of coaxial double bushings while ensuring accuracy requirements.
[0018] 3. This utility model provides a tooling design scheme for a coaxial double bushing external press-in bushing clamping device, which simplifies the operation of the bushing clamping device, saves working time, and reduces the tooling manufacturing cost. Attached Figure Description
[0019] Figure 1 Schematic diagram of coaxial double bushing;
[0020] Figure 2 This is a schematic diagram of the installation of the front bushing of this utility model;
[0021] Figure 3 This is a schematic diagram of the installation of the compressed bushing of this utility model;
[0022] Figure 4 This is a schematic diagram of the structure of this utility model.
[0023] The components include: 1. Guide shaft; 2. Hexagonal nut; 3. One-way thrust ball bearing; 4. Top block; 5. Front bushing; 6. Part; 7. Guide sleeve; 8. Thick washer; 9. Thin washer; and 10. Rear bushing. Detailed Implementation
[0024] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.
[0025] In the description of this application, it should be noted that the terms "center / part", "upper", "lower", "left", "right", "top", "bottom", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0026] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "equipped with," "sleeve-in / connected," "clamp-in," etc., should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0027] It should also be understood that the terms "comprising / including," "consisting of," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product, apparatus, process, or method that comprises a list of elements includes not only those elements but may also include, where necessary, other elements not expressly listed, or elements inherent to such a product, apparatus, process, or method. Without further limitations, an element defined by the phrases "comprising / including," "consisting of," does not exclude the presence of additional identical elements in the product, apparatus, process, or method that includes said element.
[0028] like Figures 1 to 4As shown, this utility model provides a coaxial double-shoulder external press-fit bushing clamp, including a guide shaft 1, a hexagonal nut 2, a one-way thrust ball bearing 3, a top block 4, a guide sleeve 7, a thick washer 8, and a thin washer 9. Two hexagonal nuts 2 and two guide sleeves 7 are provided. The guide shaft 1 is a symmetrical stepped shaft with a smooth shaft in the middle and threaded shafts at both ends. The top block 4, guide sleeve 7, thick washer 8, and thin washer 9 are all rotary shafts with through holes in the middle. The two hexagonal nuts 2, the one-way thrust ball bearing 3, the top block 4, and the front bushing 5... Two guide sleeves 7, thick washer 8, thin washer 9, and rear bushing 10 are all fitted onto guide shaft 1. When installing front bushing 5, one end of each of the two guide sleeves 7 is installed in the bushing hole in the middle of the two parts 6, and the outward-facing end face of each of the two parts 6 is flush with the outward-facing end face of each of the two guide sleeves 7. The other end of each of the two guide sleeves 7 is fitted onto the left and right ends of the smooth rod in the middle of guide shaft 1 through the through hole in the middle. Each of the two parts 6 is fitted onto the left and right ends of the smooth rod in the middle of guide shaft 1 through the two guide sleeves 7, and they are opposite each other. The front bushing 5 is fitted onto the left end of the guide shaft 1, with the left end face (press-in end) of the front bushing 5 flush with the left end face of the guide shaft 1. The top block 4, the one-way thrust ball bearing 3, and one of the hexagonal nuts 2 are all fitted onto the threaded rod at the left end of the guide shaft 1, with the right end face of the top block 4 in contact with the left end face (press-in end) of the front bushing 5, and the right end face of the front bushing 5 in contact with the left end face of the part 6. The one-way thrust ball bearing 3 is located between the top block 4 and the hexagonal nut 2. A thick washer 8, a thin washer 9, and another hexagonal nut are also included. Both are fitted onto the right end of the guide shaft 1, and the left end face of the thick washer 8 is in contact with the right end face of the part 6. The right end face of the thick washer 8 is in contact with the left end face of the thin washer 9. The right end face of the thin washer 9 is in contact with another hexagonal nut 2. The other hexagonal nut 2 is fitted onto the threaded rod at the right end of the guide shaft 1. The thick washer 8 and the thin washer 9 are fixed by the hexagonal nut 2 at the same end. Tighten the hexagonal nut 2 on one side of the front bushing 5 to press the front bushing 5 into the bushing hole of the part 6, and at the same time push out the guide sleeve 7 to complete the installation of the front bushing 5.After the front bushing 5 is installed, the components on both sides of the front bushing 5 are swapped. Specifically, the top block 4, one-way thrust ball bearing 3, and hexagonal nut 2 located on the left end of the front bushing 5 are removed from the guide sleeve 7, guide sleeve 7 with part 6, thick washer 8, thin washer 9, and hexagonal nut 2 located on the right end of the front bushing 5. The guide sleeve 7 with part 6 is then fitted onto the right end of the guide shaft 1. The rear bushing 10, top block 4, one-way thrust ball bearing 3, and one of the hexagonal nuts 2 are then fitted onto the right end of the guide shaft 1 in sequence, with the rear bushing 10 fitted onto the guide shaft 1. On the right end of the guide shaft 1, the right end face (i.e., the press-in end) of the rear bushing 10 is flush with the right end face of the guide shaft 1. The left end face of the rear bushing 10 is in contact with the right end face of part 6. The top block 4, the one-way thrust ball bearing 3, and one of the hexagonal nuts 2 are all fitted onto the threaded rod at the right end of the guide shaft 1, and the left end face of the top block 4 is in contact with the right end face (i.e., the press-in end) of the rear bushing 10. The one-way thrust ball bearing 3 is located between the top block 4 and the hexagonal nut 2. The thick washer 8, the thin washer 9, and the other hexagonal nut 2 are all fitted onto the threaded rod at the left end of the guide shaft 1. The right end face of the thick washer 8 is fitted with the left end face (i.e., the press-in end) of the front bushing 5, the left end face of the thick washer 8 is fitted with the right end face of the thin washer 9, and the left end face of the thin washer 9 is fitted with another hexagonal nut 2. The thick washer 8, the thin washer 9, and the front bushing 5 are fixed by the hexagonal nut 2 on the left end. Tightening the hexagonal nut 2 on one side of the rear bushing 10 presses the rear bushing 10 into the bushing hole of the part 6 and pushes out the guide sleeve 7. After the installation of the bushing 10 is completed, the double bushing clamping work is realized. The threaded rods at both ends of the guide shaft 1 are symmetrically located at both ends of the smooth rod, and The outer diameter of the threaded rod is smaller than that of the smooth rod. The threaded hole diameters of the two hexagonal nuts 2 are matched with the outer diameters of the threaded rods at the left and right ends of the guide shaft 1, respectively. The through-hole diameters in the middle of the thick washer 8 and the thin washer 9 are both larger than the outer diameter of the guide shaft 1. The bore diameter of the one-way thrust ball bearing 3 is matched with the outer diameters of the threaded rods at the left and right ends of the guide shaft 1. The through-hole diameter in the middle of the top block 4 is larger than the outer diameter of the guide shaft 1. The smooth rod outer diameter of the guide shaft 1 is matched with the bore diameters of the front bushing 5, the rear bushing 10, and the guide sleeve 7. The outer diameter of the guide sleeve 7 is matched with the bushing hole diameter of part 6.
[0029] Preferably, the guide shaft 1 is a stepped shaft whose outer diameter gradually decreases from the middle to both ends. The middle part of the stepped shaft is a smooth rod structure, and the left and right ends of the smooth rod structure are threaded rods, and the left and right ends are symmetrical structures.
[0030] Preferably, the diameter of the hole in the thick washer 8 is larger than the outer diameter of the guide shaft 1.
[0031] Preferably, the diameter of the thin washer 9 is larger than the outer diameter of the threaded rods at both ends of the guide shaft 1.
[0032] In this utility model, the front bushing 5 and the rear bushing 10 have the same structure, shape and size, and are both bushings.
[0033] The working principle of this utility model is as follows: This utility model mainly considers the design of a coaxial double-blade external press-fit bushing clamp. Considering the characteristics of bushing installation, the front bushing 5 and the rear bushing 10 need to be pressed into the bushing holes of part 6, as shown in the attached diagram. Figure 1 As shown, first press the front bushing 5 into the bushing hole of part 6. Based on the positioning of the rear bushing hole of part 6, first install the two guide sleeves 7 into the bushing holes of the two parts 6 respectively. Then, install the guide shaft 1 into the guide sleeve 7, and install the front bushing 5 onto the guide shaft 1. The one-way thrust ball bearing 3 is installed on one side of the pressing direction of the front bushing 5 to prevent the bushing from rotating and wearing the parts when the hexagonal nut 2 is rotated during the pressing of the bushing. Finally, follow the attached instructions. Figure 2 The front bushing installation diagram shows the sequential installation of top block 4, one-way thrust ball bearing 3, thick washer 8, thin washer 9, and hexagonal nut 2. After installation, tighten the hexagonal nut 2 on one side of the front bushing 5 to press the front bushing 5 into the bushing hole of part 6. After the front bushing 5 is installed, swap the components on both sides of the front bushing 5, following the installation method... Figure 3 The rear bushing installation diagram shows the sequential installation of guide sleeve 7, guide shaft 1, rear bushing 10, top block 4, one-way thrust ball bearing 3, thick washer 8, thin washer 9, and hexagonal nut 2. After installation, tighten the hexagonal nut 2 on one side of the rear bushing 10 to press the rear bushing 10 into the bushing hole of part 6. Finally, remove the bushing clamping device of this utility model to complete the coaxial double bushing external pressing bushing operation. It can be seen that this solution realizes the coaxial double bushing clamping operation with one bushing clamping device, which simplifies the operation, saves a lot of working time, reduces the tooling manufacturing pressure, and saves costs.
[0034] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.
Claims
1. A coaxial double-shoulder external press-fit bushing clamp, characterized in that: The system includes a guide shaft, hexagonal nut, top block, guide sleeve, thick washer, and thin washer. Two hexagonal nuts and two guide sleeves are provided. The guide shaft is a stepped shaft with a smooth central section and threaded ends. The top block, guide sleeve, thick washer, and thin washer are all rotary shafts with a through hole in the central section. Two guide sleeves are respectively fitted onto the two ends of the smooth guide shaft. One hexagonal nut and one top block are fitted onto one end of the guide shaft, both located outside the guide sleeve at that end. The hexagonal nut is located outside the top block. The thick washer... A thin washer and another hexagonal nut are fitted onto the other end of the guide shaft, both located outside the guide sleeve at the other end. The thin washer is located between the thick washer and the other hexagonal nut. The parts that need to be pressed into the bushings are fitted onto the two guide sleeves through the bushing holes on them, and the outer end face of the parts is flush with the outer end face of the guide sleeves. The bushings are fitted onto the smooth rod of the guide shaft, and the end face of the bushing on the side where it is pressed in is in contact with the end face of the top block, while the other end face is in contact with the outer end face of the parts.
2. The coaxial double bushing external press-fit bushing clamping device according to claim 1, characterized in that: Two hexagonal nuts are respectively fitted onto the threaded rods at the left and right ends of the guide shaft.
3. The coaxial double bushing external press-fit bushing clamping device according to claim 1, characterized in that: A one-way thrust ball bearing is also provided between the top block and the hexagonal nut, and the one-way thrust ball bearing is sleeved on the threaded rod.
4. The coaxial double bushing external press-fit bushing clamping device according to claim 3, characterized in that: The bore diameter of the one-way thrust ball bearing matches the outer diameter of the threaded rods at both ends of the guide shaft.
5. The coaxial double bushing external press-fit bushing clamping device according to claim 1, characterized in that: The diameter of the threaded hole of the hexagonal nut matches the outer diameter of the threaded rods at both ends of the guide shaft.
6. The coaxial double bushing external press-fit bushing clamping device according to claim 1, characterized in that: The outer diameter of the polished rod matches the diameter of the bushing hole and the diameter of the guide sleeve hole.
7. The coaxial double bushing external press-fit bushing clamping device according to claim 1, characterized in that: The outer diameter of the guide sleeve matches the diameter of the bushing hole in the part.
8. The coaxial double bushing external press-fit bushing clamping device according to claim 1, characterized in that: The diameter of the through hole in the middle of both the thick and thin washers is larger than the outer diameter of the guide shaft.
9. The coaxial double bushing external press-fit bushing clamping device according to claim 1, characterized in that: The diameter of the through hole in the middle of the top block is larger than the outer diameter of the guide shaft.