Vibration reduction and isolation guide assembly

Abstract

The utility model relates to the technical field of construction vibration reduction, in particular to a vibration reduction and isolation guide assembly. The device moves up and down on the guide rail through the guide unit. The guide unit comprises a hollow shaft, a guide wheel, a first elastic washer, a first fixing ring, a second elastic washer, a second fixing ring and a bearing, a double vibration reduction and isolation structure is formed through sleeving connection of all the parts, vibration of a vibration source to a guide rail embedded in the guide wheel can be remarkably reduced, and therefore mechanical equipment is protected.

Description

Technical Field

[0001] This application relates to the field of construction vibration reduction technology, specifically to a vibration reduction and isolation guiding component. Background Technology

[0002] High-pressure jet grouting machines utilize a drilling rig to drill a grouting pipe with a nozzle into the soil layer. High-pressure equipment then pressurizes the grout or water into a high-pressure jet, which is ejected from the nozzle. This high-pressure jet cuts, disturbs, and damages the soil. High-pressure jet grouting machines typically use a lifting mechanism to raise and lower the drill bit. The drill bit generates significant vibration during operation. Without vibration damping structures, this vibration is transmitted to the lifting mechanism, subjecting it to additional dynamic loads and greatly increasing the risk of malfunction, thus affecting construction accuracy. Utility Model Content

[0003] This application provides a vibration reduction and isolation guide component that effectively reduces the vibration transmission process of the drill bit in a high-pressure jet grouting machine.

[0004] The technical solution of this application is as follows:

[0005] A vibration damping and isolation guiding assembly includes a bracket and a guide unit rotatably disposed on the bracket, the guide unit comprising:

[0006] A hollow shaft, located at the center of the guide unit, has stepped grooves extending on both sides of the hollow shaft, the stepped grooves having a smooth portion and a threaded portion from the inside out;

[0007] A guide wheel is sleeved between the smooth portions on both sides of the hollow shaft. A limiting hole is provided in the center of the guide wheel, and an embedding space is formed between the limiting hole and the smooth portion.

[0008] A first elastic washer is disposed within the embedded space and sleeved on the smooth portion;

[0009] A first fixing ring is fitted onto the first elastic washer, and the edge of the first fixing ring is provided with elastic protrusions for fastening the first elastic washer.

[0010] A second elastic washer is fitted onto the first fixing ring. The second elastic washer has a plurality of mounting holes arranged in a circumferential array around its center, and the mounting holes are provided with elastic elements.

[0011] The second fixing ring is disposed outside the second elastic ring and fastened to the threaded portion;

[0012] A bearing is disposed inside the hollow shaft and fixedly connected to the hollow shaft. A wheel axle passes through the center of the bearing and is fixed to the bracket.

[0013] Furthermore, the outer edge of the first elastic washer is provided with threads, and the first fixing ring and the first elastic washer are connected by threads.

[0014] Furthermore, the elastic bumps are distributed in a ring array along the outer wall of the first elastic washer.

[0015] Furthermore, the guide wheel has a guide groove for engaging with the guide rail.

[0016] Furthermore, the bracket includes at least two guide units, and all guide units of each bracket are located on the same axis.

[0017] Furthermore, the elastic element is constructed as a long column with an S-shaped cross-section, with the upper and lower ends of the S-shaped cross-section placed horizontally in the mounting hole and abutting against the inner wall of the mounting hole.

[0018] Due to the adoption of the above technical solution, the beneficial effects of this application are as follows:

[0019] This application utilizes guide wheels for guidance, which move up and down on a guide rail. During drill bit operation, vibrations are generated and transmitted from the drill bit through a support to the lifting mechanism (the guide rail is part of the lifting mechanism). The support is connected to the wheel axle, and the vibrations are transmitted outward through the wheel axle to the guide groove of the guide wheel, thus affecting the vibration of the lifting structure. In this application, a first elastic washer provides the first layer of vibration isolation, and a first fixing ring secures the first elastic washer to prevent it from loosening. A second layer of isolation is achieved through a second elastic washer and an elastic element. The elastic element has an S-shaped cross-section, with both ends protruding and abutting against the front and rear inner walls of the horizontal direction of the mounting hole. The compressibility of the S-shaped structure further reduces vibration.

[0020] This application reduces drill bit vibration twice through two vibration damping components, which can effectively protect the lifting mechanism in contact with the guide wheel and reduce the dynamic load acting on the lifting mechanism. Attached Figure Description

[0021] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0022] Figure 1 This application provides an overall structural diagram of a vibration reduction and isolation guiding component;

[0023] Figure 2 This is an exploded view of the structure of the guide unit described in this application;

[0024] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0025] In the attached diagram:

[0026] 1. Bracket; 2. Guide unit; 3. Hollow shaft; 3-1. Stepped groove; 3-1-1. Smooth part; 3-1-2. Threaded part; 4. Guide wheel; 4-1. Limiting hole; 4-2. Guide groove; 5. First elastic washer; 6. First fixing ring; 6-1. Elastic protrusion; 7. Second elastic washer; 7-1. Mounting hole; 7-2. Elastic element; 8. Second fixing ring; 9. Bearing; 10. Axle. Detailed Implementation

[0027] Based on the background art, this application provides a vibration reduction and isolation guiding assembly, including a bracket 1 and a guide unit 2 rotatably disposed on the bracket 1, the guide unit 2 including:

[0028] Hollow shaft 3, the hollow shaft 3 is located at the center of guide unit 2 and the hollow shaft 3 extends to both sides with stepped grooves 3-1, the stepped grooves 3-1 have a smooth part 3-1-1 and a threaded part 3-1-2 from the inside to the outside;

[0029] Guide wheel 4, the guide wheel 4 is sleeved between the smooth parts 3-1-1 on both sides of the hollow shaft 3, the guide wheel 4 has a limiting hole 4-1 in the center, and the limiting hole 4-1 and the smooth part 3-1-1 form an embedding space;

[0030] The first elastic washer 5 is disposed in the embedded space and sleeved on the smooth part 3-1-1;

[0031] The first fixing ring 6 is sleeved on the first elastic washer 5, and the edge of the first fixing ring 6 is provided with elastic protrusions 6-1 for fastening the first elastic washer 5.

[0032] The second elastic washer 7 is sleeved on the first fixing ring 6. The second elastic washer 7 has a plurality of mounting holes 7-1 arranged in a circumferential array around the center. The mounting holes 7-1 are provided with elastic elements 7-2.

[0033] The second fixing ring 8 is disposed outside the second elastic ring and fastened to the threaded portion 3-1-2;

[0034] The bearing 9 is disposed inside the hollow shaft 3 and fixedly connected to the hollow shaft 3. A wheel axle 10 passes through the center of the bearing 9 and is fixed to the bracket 1.

[0035] The vibration damping and guiding assembly in this application is used for guide rail vibration damping. The guide wheel 4 has a guiding function and is mounted on the bracket 1, which is fixedly connected to the vibration source. When the vibration source vibrates, the vibration is transmitted to the guide wheel 4. The structure of the guide wheel 4 isolates the vibration, thereby protecting the guide rail that the guide wheel 4 contacts, and further protecting other devices that the guide rail contacts. Specifically, as shown in the attached... Figure 1 ~Appendix Figure 3 As shown, this application can be used for drill bits in high-pressure jet grouting piles. Supports 1 are welded to both sides of the drill rod, and the drill bit is raised and lowered via a lifting mechanism with guide rails and a vibration-damping guide assembly. During operation, the drill bit generates vibration, which is transmitted from the drill bit through the support 1 to the lifting mechanism (the guide rail is part of the lifting mechanism). The support 1 is connected to the axle 10, and the vibration is transmitted outward through the axle 10 to the guide groove 4-2 of the guide wheel 4, thus affecting the vibration of the lifting structure. In this application, a first layer of vibration isolation is achieved through a first elastic washer 5, and a first fixing ring 6 is used to fix the first elastic washer 5 to prevent it from loosening. A second layer of isolation is achieved through a second elastic washer 7 and an elastic element 7-2. The elastic element 7-2 has an S-shaped cross-section, with its upper and lower ends protruding. It abuts against the front and rear inner walls of the horizontal direction of the mounting hole 7-1, utilizing the compressibility of the S-shaped structure to further reduce vibration. The upper and lower ends of the aforementioned S-shaped elastic element 7-2 refer to the upper and lower ends of the "S" structure when it is placed upright, i.e., the most protruding parts of the S-shaped structure. When the protruding part is compressed, the bending structure deforms and absorbs vibration. In practice, the elastic element 7-2 is placed laterally so that the line connecting the upper and lower vertices of the S-structure is parallel to the axial direction, thereby improving the vibration reduction effect.

[0036] In this application, a wheel axle 10 is inserted through the bearing 9, and anchor screws are provided at both ends of the wheel axle 10. The anchor screws, as part of the wheel axle 10, fasten the wheel axle 10 to prevent the guide unit 2 from loosening under high-frequency vibration.

[0037] In a preferred embodiment of this application, the outer edge of the first elastic washer 5 is threaded, and the first fixing ring 6 is threadedly connected to the first elastic washer. It is necessary to ensure that the elastic protrusion 6-1 of the first fixing ring 6 can secure the first elastic washer 5. The space enclosed by the elastic protrusion 6-1 is slightly smaller than or equal to the outer diameter of the first elastic washer 5, utilizing the elastic deformation of the material to secure the first elastic washer 5. Specifically, the first fixing ring 6 can be made of thin steel sheet.

[0038] The elastic protrusions 6-1 are distributed in a ring array along the outer wall of the first elastic washer 5. The ring array indicates that there are intervals between the elastic protrusions 6-1, and each elastic protrusion 6-1 is distributed with equal arc, which helps to make the force on the first elastic washer 5 more uniform.

[0039] In a preferred embodiment of this application, the guide wheel 4 has a guide groove 4-2 for engaging with the guide rail. (See attached...) Figure 1 and attached Figure 2 As shown, guide groove 4-2 is used for contact and guidance with the protected mechanism, and guide groove 4-2 is used for guiding guide wheel 4.

[0040] In a preferred embodiment of this application, the bracket 1 includes at least two guide units 2, and all guide units 2 of each bracket 1 are located on the same axis. The two guide units 2 ensure a straight guide path, improving vibration reduction and isolation effects. The guide units 2 being located on the same axis means that the guide units 2 are aligned in vertical space.

[0041] In a preferred embodiment of this application, the elastic element 7-2 is constructed as a long column with an S-shaped cross-section, and the upper and lower ends of the S-shaped cross-section are horizontally placed in the mounting hole 7-1 and abut against the inner wall of the mounting hole 7-1.

[0042] This application reduces drill bit vibration twice through two vibration damping components, effectively protecting the lifting mechanism in contact with the guide wheel 4 and reducing the dynamic load acting on the lifting mechanism. Any aspects not described in this application can be achieved by using or referencing existing technologies.

[0043] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A vibration damping and guiding assembly, comprising a bracket and a guide unit rotatably disposed on the bracket, characterized in that, The guiding unit includes: A hollow shaft, located at the center of the guide unit, has stepped grooves extending on both sides of the hollow shaft, the stepped grooves having a smooth portion and a threaded portion from the inside out; A guide wheel is sleeved between the smooth portions on both sides of the hollow shaft. A limiting hole is provided in the center of the guide wheel, and an embedding space is formed between the limiting hole and the smooth portion. A first elastic washer is disposed within the embedded space and sleeved on the smooth portion; A first fixing ring is fitted onto the first elastic washer, and the edge of the first fixing ring is provided with elastic protrusions for fastening the first elastic washer. A second elastic washer is fitted onto the first fixing ring. The second elastic washer has a plurality of mounting holes arranged in a circumferential array around its center, and the mounting holes are provided with elastic elements. The second retaining ring is disposed outside the second elastic washer and fastened to the threaded portion; A bearing is disposed inside the hollow shaft and fixedly connected to the hollow shaft. A wheel axle passes through the center of the bearing and is fixed to the bracket.

2. The vibration reduction and isolation guiding assembly according to claim 1, characterized in that, The outer edge of the first elastic washer is threaded, and the first fixing ring is connected to the first elastic washer by the thread.

3. The vibration reduction and isolation guiding component according to claim 2, characterized in that, The elastic bumps are distributed in a ring array along the outer wall of the first elastic washer.

4. The vibration reduction and isolation guiding assembly according to claim 1, characterized in that, The guide wheel has a guide groove for engaging with the guide rail.

5. A vibration reduction and isolation guiding assembly according to claim 1, characterized in that, The bracket includes at least two guide units, and all guide units of each bracket are located on the same axis.

6. A vibration reduction and isolation guiding assembly according to claim 1, characterized in that, The elastic element is constructed as a long column with an S-shaped cross-section. The upper and lower ends of the S-shaped cross-section are horizontally placed in the mounting hole and abut against the inner wall of the mounting hole.

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