A pull rod limiter

Abstract

The present invention discloses a pull rod type limiter, characterized in that it comprises: an upper base plate, a buffer block, a limit disk, a limit shaft, a buffer sleeve and a lower base plate; the upper base plate and the lower base plate are arranged opposite to and in parallel, the two limit disks are arranged in parallel between the two, the more than two limit shafts pass through the two limit disks in sequence, one end of the more than one limit shaft is fixed on the lower limit disk, and the other end is fixed on the upper base plate; one end of the remaining limit shaft is fixed on the upper limit disk, and the other end is fixed on the lower base plate; a buffer sleeve is coaxially sleeved on the axial middle part of each limit shaft, the buffer sleeve on the limit shaft fixed between the lower limit disk and the upper base plate is matched with the clearance of the through hole set on the upper limit disk, and the buffer sleeve on the limit shaft fixed between the upper limit disk and the lower base plate is matched with the clearance of the through hole set on the lower limit disk; a buffer block is respectively provided on one end of the upper base plate facing the limit disk, one end of the lower base plate facing the limit disk, and any end surface opposite to the two limit disks.

Description

Technical Field

[0001] The invention relates to the technical field of vibration noise control, and in particular to a pull rod type limiter. Background Art

[0002] In order to improve the vibration isolation performance of the vibration isolation device while maintaining the deformation stability of the vibration isolation device, a limiter is often installed on the vibration isolation device. The limiter mainly plays a limiting role under impact conditions, so the limiter needs to withstand huge impact force.

[0003] The limiter needs to have the characteristic of high safety factor. There is no limiter in the prior art that fully meets this requirement. Summary of the invention

[0004] In view of this, the present invention provides a pull rod type limiter, which has the characteristics of redundant structure and high safety factor and can be widely used in impact protection of equipment.

[0005] The technical solution of the present invention is: a pull rod type limiter, characterized by comprising: an upper base plate, a buffer block, a limit plate, a limit shaft, a buffer sleeve and a lower base plate;

[0006] The upper base plate and the lower base plate are arranged oppositely and in parallel, and two limit plates are arranged in parallel between the two. More than two limit shafts pass through the two limit plates in sequence, and one end of more than one limit shaft is fixed on the lower limit plate, and the other end is fixed on the upper base plate; one end of the remaining limit shaft is fixed on the upper limit plate, and the other end is fixed on the lower base plate; wherein the lower limit plate is the limit plate close to the lower base plate, and the upper limit plate is the limit plate close to the upper base plate;

[0007] A buffer sleeve is coaxially sleeved on the axial middle part of each limiting shaft, the buffer sleeve fixed on the limiting shaft between the lower limiting plate and the upper base plate is gap matched with the through hole provided on the upper limiting plate, and the buffer sleeve fixed on the limiting shaft between the upper limiting plate and the lower base plate is gap matched with the through hole provided on the lower limiting plate; wherein, the gap match is used for the buffer sleeve to provide a buffering effect on the circumferential shaking of the limiting plate;

[0008] A buffer block is respectively provided on one end of the upper base plate facing the limiting plate, one end of the lower base plate facing the limiting plate and any opposite end surface of the two limiting plates, for providing a buffering effect for the axial shaking of the two limiting plates along the limiting axis.

[0009] Preferably, it also includes: a gasket tube, wherein two or more gasket tubes are respectively provided at one end of the upper base plate and the lower base plate away from the limit plate, for separating the upper base plate and the lower base plate from external equipment; wherein each gasket tube is a hollow cylindrical structure, and is coaxial with a through hole provided on the upper base plate or the lower base plate, and the through hole is used to connect the upper base plate and the lower base plate with external equipment.

[0010] Preferably, the upper base plate and the lower base plate both have a square structure.

[0011] Preferably, cushion tubes are provided at the four corners of the upper base plate and the lower base plate.

[0012] Preferably, the upper base plate and the lower base plate both have a circular structure.

[0013] Preferably, eight limit shafts are provided between the upper base plate and the lower base plate, four of which are fastened to the lower limit plate at one end by fasteners, and fastened to the upper base plate at the other end by fasteners; the other four limit shafts are fastened to the upper limit plate at one end by fasteners, and fastened to the lower base plate at the other end by fasteners.

[0014] Preferably, the limiting plate is circular or square in shape.

[0015] Preferably, the buffer sleeve is made of rubber or polyurethane material.

[0016] Preferably, the buffer block is made of rubber or polyurethane material.

[0017] Preferably, one end of the buffer block providing buffering effect is a curved surface.

[0018] Beneficial effects:

[0019] 1. The limiter of the present invention has the following characteristics: First, the limiter is a redundant structure. When the limiter is subjected to an impact load, there are more than two limit bearing forces. Even if one of them is damaged, the remaining limit shaft can continue to work; second, the limiter has a high safety factor, which is mainly manifested in: 1) when the limiter is subjected to an axial impact load, the more than two limit shafts only bear tension or pressure, and the force uniformity is extremely good, and the strength performance of the material can be fully exerted; 2) when the limiter is subjected to an axial impact load, the limit plate and the bottom plate (upper bottom plate or lower bottom plate) are only stressed in the middle, and are fixed by the limit shafts on all sides. The force state is good, and the strength performance of the material can be fully exerted; third, the limiter is easy to disassemble and assemble, and has good environmental adaptability, which is specifically manifested in: 1) using general pliers and other tools, the limiter can be disassembled and assembled on site; 2) the main structure of the limiter is made of metal, and the materials of the buffer pad and the buffer sleeve can also be selected according to the requirements of oil resistance and water resistance, so as to adapt to various use environment requirements in ships.

[0020] 2. The design of the cushion tube in the present invention can effectively connect and separate the limiter from the external device.

[0021] 3. In the present invention, the upper and lower base plates are designed to be square, which can effectively utilize the installation space of the upper and lower base plates.

[0022] 4. In the present invention, the upper and lower base plates are designed to be circular, which can meet more installation requirements.

[0023] 5. The arc surface design of the buffer block in the present invention is conducive to reducing the initial collision force during buffering. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an assembly diagram of the limiter of the present invention.

[0025] Figure 2 It is an exploded view of the limiter of the present invention.

[0026] Among them, 1- cushion cylinder, 2- upper base plate, 3- buffer block, 4- limit plate, 5- limit shaft, 6- buffer sleeve, 7- lower base plate. DETAILED DESCRIPTION

[0027] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0028] Embodiment 1:

[0029] This embodiment provides a pull rod type limiter, which has the characteristics of redundant structure and high safety factor, and can be widely used in impact protection of equipment.

[0030] like Figure 1 and Figure 2 As shown, the pull rod type limiter comprises: a cushion cylinder 1, an upper base plate 2, a buffer block 3, a limit plate 4, a limit shaft 5, a buffer sleeve 6 and a lower base plate 7;

[0031] The upper base plate 2 and the lower base plate 7 are arranged oppositely and in parallel, and two limit plates 4 (both of which are disc-shaped structures are adopted here) are arranged in parallel therebetween, and more than two limit shafts 5 (the number of limit shafts 5 is adjustable, so that the redundancy of the limiter can be designed as needed, and the stress state of the limiter can also be improved. Eight limit shafts 5 are preferably used here) pass through the two limit plates 4 in sequence, and one end of more than one limit shaft 5 (preferably four limit shafts 5) is fastened to the limit plate 4 (referred to as the lower limit plate) close to the lower base plate 7 by a fastener (such as a nut), and the other end is fastened to the upper base plate 2 by a fastener; one end of the remaining limit shafts 5 (preferably four limit shafts 5) is fastened to the limit plate 4 (referred to as the upper limit plate) close to the upper base plate 2 by a fastener, and the other end is fastened to the lower base plate 7 by a fastener;

[0032] Each limiting shaft 5 is a stepped shaft that is thick in the middle and thin at both ends, and a buffer sleeve 6 (made of rubber to have good buffering performance) is coaxially sleeved on the middle axial part thereof. The buffer sleeve 6 on the limiting shaft 5 fixed between the lower limiting disk and the upper base plate 2 is clearance-matched with the large through hole provided on the upper limiting disk, and the buffer sleeve 6 on the limiting shaft 5 fixed between the upper limiting disk and the lower base plate 7 is clearance-matched with the large through hole provided on the lower limiting disk; wherein, each limiting disk 4 is provided with one or more large through holes and one or more small through holes, and the large through holes are used to clearance-match with the buffer sleeve 6, so that the buffer sleeve 6 provides buffering effect for the circumferential shaking of the limiting disk 4; the small through holes are used for the small end of the limiting shaft 5 to pass through them, so as to facilitate the fasteners to fasten the limiting disk 4 and the limiting shaft 5 as one (the step surfaces at both ends of the limiting shaft 5 correspondingly contact the lower limiting disk and the upper base plate 2 or the upper limiting disk and the lower base plate 7);

[0033] A buffer block 3 is provided on one end of the upper base plate 2 facing the limit plate 4, one end of the lower base plate 7 facing the limit plate 4, and any end surface opposite to the two limit plates 4, respectively, for providing a buffering effect for the axial shaking of the two limit plates 4 along the limit axis 5; wherein the buffer block 3 is made of rubber material, so that it has good buffering performance;

[0034] Two or more gasket tubes 1 are respectively provided at one end of the upper base plate 2 and the lower base plate 7 away from the limit plate 4 (preferably, gasket tubes 1 are provided at the four corners of the upper base plate 2 and the lower base plate 7, and each gasket tube 1 is a hollow cylindrical structure), which are used to maintain a certain gap between the upper base plate 2 and the lower base plate 7 and the external equipment, thereby separating the upper base plate 2 and the lower base plate 7 from the external equipment; wherein each gasket tube 1 is coaxial with a through hole provided with the upper base plate 2 or the lower base plate 7, and the through hole is used to connect the limiter with the external equipment.

[0035] Embodiment 2:

[0036] On the basis of Embodiment 1, both the upper base plate 2 and the lower base plate 7 adopt a square structure, so as to effectively utilize the installation space of the upper base plate 2 and the lower base plate 7.

[0037] Embodiment 3:

[0038] On the basis of Embodiment 1, the upper base plate 2 and the lower base plate 7 are designed to be circular or other shapes to meet more installation requirements.

[0039] Embodiment 4:

[0040] Based on Example 1 or Example 2 or Example 3, the buffer block 3 is a semi-ellipsoidal structure, and its planar end is fixed on one end of the upper base plate 2 facing the limit plate 4, one end of the lower base plate 7 facing the limit plate 4, and any opposite end surface of the two limit plates 4, and the curved end is beneficial to reducing the initial collision force.

[0041] Embodiment 5:

[0042] On the basis of any one of the embodiments 1-4, the material of the buffer block 3 and the buffer sleeve 6 can be replaced with other elastomeric materials such as polyurethane to adapt to a more complex use environment.

[0043] Embodiment 6:

[0044] On the basis of any one of the embodiments 1-5, the limiting plate 4 can be designed into a square shape or the like to meet more installation requirements.

[0045] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pull rod type limiter, characterized in that: include: An upper base plate (2), a buffer block (3), a limiting plate (4), a limiting shaft (5), a buffer sleeve (6) and a lower base plate (7); The upper base plate (2) and the lower base plate (7) are arranged opposite to each other and in parallel, and two limit plates (4) are arranged in parallel between the two. More than two limit shafts (5) pass through the two limit plates (4) in sequence, and one end of more than one limit shaft (5) is fixed on the lower limit plate, and the other end is fixed on the upper base plate (2); one end of the remaining limit shaft (5) is fixed on the upper limit plate, and the other end is fixed on the lower base plate (7); wherein the lower limit plate is the limit plate (4) close to the lower base plate (7), and the upper limit plate is the limit plate (4) close to the upper base plate (2); A buffer sleeve (6) is coaxially sleeved on the axial middle part of each limiting shaft (5); the buffer sleeve (6) fixed on the limiting shaft (5) between the lower limiting plate and the upper base plate (2) is clearance-matched with a through hole provided on the upper limiting plate; the buffer sleeve (6) fixed on the limiting shaft (5) between the upper limiting plate and the lower base plate (7) is clearance-matched with a through hole provided on the lower limiting plate; wherein the clearance-matching is used for the buffer sleeve (6) to provide a buffering effect on the circumferential shaking of the limiting plate (4); A buffer block (3) is respectively provided on one end of the upper base plate (2) facing the limiting plate (4), one end of the lower base plate (7) facing the limiting plate (4), and any opposite end faces of the two limiting plates (4), for providing a buffering effect for the axial shaking of the two limiting plates (4) along the limiting axis (5); The upper base plate (2) and the lower base plate (7) both have a circular structure; Eight limiting shafts (5) are arranged between the upper base plate (2) and the lower base plate (7), one end of four limiting shafts (5) are fastened to the lower limiting plate by fasteners, and the other end is fastened to the upper base plate (2) by fasteners; one end of the other four limiting shafts (5) are fastened to the upper limiting plate by fasteners, and the other end is fastened to the lower base plate (7) by fasteners.

2. The pull rod type limiter according to claim 1, characterized in that: Also includes: A gasket tube (1), two or more gasket tubes (1) are respectively provided at one end of the upper base plate (2) and the lower base plate (7) away from the limiting plate (4), and are used to separate the upper base plate (2) and the lower base plate (7) from external equipment; wherein each gasket tube (1) is a hollow cylindrical structure and is coaxial with a through hole provided on the upper base plate (2) or the lower base plate (7), and the through hole is used to connect the upper base plate (2) and the lower base plate (7) to external equipment.

3. The pull rod type limiter according to claim 2, characterized in that: The upper base plate (2) and the lower base plate (7) both have a square structure.

4. The pull rod type limiter according to claim 3, characterized in that: Cushion cylinders (1) are provided at the four corners of the upper base plate (2) and the lower base plate (7).

5. The pull rod type limiter according to claim 1, characterized in that: The shape of the limiting plate (4) is circular or square.

6. The pull rod type limiter according to claim 1, characterized in that: The buffer sleeve (6) is made of rubber or polyurethane material.

7. The pull rod type limiter according to claim 1, characterized in that: The buffer block (3) is made of rubber or polyurethane material.

8. The pull rod type limiter according to any one of claims 1 to 7, characterized in that: One end of the buffer block (3) that provides a buffering effect is a curved surface.

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