Vibration sensor elastic connector

Abstract

This utility model discloses a vibration sensor connector, including a driving device and a housing. A mandrel is disposed within the housing, extending axially through the housing and movable axially within it. A mounting base is provided at the front end of the mandrel, and a mounting groove for mounting a vibration sensor is provided on the outer side of the mounting base. A spring is fitted onto the mandrel, with one end of the spring abutting against the mounting base and the other end abutting against the housing. The vibration sensor connector provided by this utility model, through cylinder driving and spring buffering, ensures that the sensor always contacts the measured surface, guaranteeing detection accuracy. It also features a stable and reliable structure and facilitates assembly and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of vibration detection technology, and in particular to an elastic connector for a vibration sensor. Background Technology

[0002] In the field of industrial equipment condition monitoring, vibration sensors are key components for acquiring equipment operating status information, and their stable adhesion to the surface of the equipment under test directly affects the accuracy of the detection data. In existing technologies, vibration sensors are typically fixed to the outer shell of the equipment under test via mechanical fastening or simple connectors, or magnetically attached. However, during long-term operation, factors such as the vibration of the equipment itself, fatigue of connectors, or environmental vibrations can easily cause the vibration sensor to loosen, shift, or even detach from the surface of the equipment, resulting in interrupted or distorted detection signals and affecting the reliability of equipment condition monitoring.

[0003] Furthermore, the mounting structure of vibration sensors typically lacks buffering and adjustment capabilities. When the device under test experiences slight displacement due to temperature changes or fluctuations in operating conditions, the contact pressure between the sensor and the device surface can change abruptly. This can not only damage the sensor but also cause abnormal fluctuations in the detection data, making it difficult to meet the requirements for high-precision, long-term stable monitoring. Therefore, there is an urgent need for a connection device that can ensure a stable fit between the vibration sensor and the device under test and has a certain degree of buffering and adjustment capabilities. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a vibration sensor elastic connector, which aims to solve the technical problems of easy loosening and displacement of the connection between the vibration sensor and the device under test, and lack of buffer adjustment capability in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A vibration sensor elastic connector includes a housing, a spindle disposed inside the housing, the spindle extending axially through the housing and movable axially within the housing; a mounting seat is disposed at the front end of the spindle, and a mounting groove for mounting a vibration sensor is disposed on the outer side of the mounting seat; a spring is sleeved on the spindle, one end of the spring abutting against the mounting seat, and the other end of the spring abutting against the housing; the vibration sensor elastic connector further includes a drive device for driving the housing to move along the axis.

[0006] Furthermore, in the aforementioned vibration sensor elastic connector, an annular groove is provided on the inner side of the mounting base, and an annular flange is provided in the inner cavity of the housing; the front end of the spring extends into the annular groove, and the rear end of the spring abuts against the annular flange.

[0007] Furthermore, in the aforementioned vibration sensor elastic connector, a positioning cone is connected to the rear end of the spindle, and a positioning cone hole is provided at the rear end of the housing cavity, wherein the shapes of the positioning cone and the positioning cone hole are compatible.

[0008] Furthermore, in the aforementioned vibration sensor elastic connector, the positioning cone and the mandrel are coaxially arranged.

[0009] Furthermore, in the aforementioned vibration sensor elastic connector, the front end of the positioning cone is provided with a circular cavity, and the rear end of the mandrel is inserted into the circular cavity.

[0010] Furthermore, in the aforementioned vibration sensor elastic connector, the rear end of the spindle is axially provided with a threaded hole, and the positioning cone is axially provided with a connecting hole, through which a locking bolt passes and is screwed into the threaded hole.

[0011] Furthermore, in the aforementioned vibration sensor elastic connector, the driving device is a cylinder.

[0012] Furthermore, in the aforementioned vibration sensor elastic connector, a support base is fixedly connected to the housing, and a cylinder connecting plate is provided at the front end of the piston rod of the cylinder, which is connected to the support base.

[0013] Furthermore, in the aforementioned vibration sensor elastic connector, the support base includes two L-shaped plates arranged opposite each other. The horizontal arm of each L-shaped plate is connected to the cylinder connecting plate by bolts, and the vertical arm of each L-shaped plate is connected to the housing by bolts.

[0014] Furthermore, in the aforementioned vibration sensor elastic connector, the rear ends of the two L-shaped plates are flush, and the rear ends of the L-shaped plates extend rearward relative to the rear end of the positioning cone. When the cylinder piston rod is not extended, the distance between the rear ends of the L-shaped plates and the rear ends of the positioning cone is greater than the maximum axial stroke of the mandrel within the housing. Beneficial effects: This utility model provides a vibration sensor elastic connector, which, compared to the prior art, has at least the following advantages: (1) Good contact stability. Through the synergistic effect of the cylinder and the spring, the elastic force generated by the spring during the detection process keeps the sensor in close contact with the surface being measured, avoiding poor contact due to vibration, displacement and other factors, and ensuring the accuracy and reliability of the detection data.

[0015] (2) It plays a buffering and protective role. When the equipment vibrates or the measured surface has slight unevenness, the spring can absorb these vibrations and displacements through its own elastic deformation, effectively reducing the violent fluctuations in the contact force between the sensor and the measured surface, playing a good buffering and protective role, and extending the service life of the sensor and the measured equipment. Attached Figure Description

[0016] Figure 1Three-dimensional elastic connector for vibration sensor Figure 1 The cylinder piston rod is not extended in the picture.

[0017] Figure 2 Three-dimensional elastic connector for vibration sensor Figure 2 The cylinder piston rod is extended in the picture.

[0018] Figure 3 Cross-section of the elastic connector for the vibration sensor Figure 1 The cylinder piston rod is not extended in the picture.

[0019] Figure 4 Cross-section of the elastic connector for the vibration sensor Figure 2 The cylinder piston rod is extended in the picture.

[0020] Figure 5 for Figure 3 A magnified view of part A in the middle.

[0021] Figure 6 for Figure 4 A magnified view of part B in the middle section.

[0022] Figure 7 This is a three-dimensional view of the mandrel and mounting base.

[0023] Figure 8 This is a three-dimensional view of the positioning cone.

[0024] Explanation of reference numerals in the attached figures: 1. Cylinder; 11. Piston rod; 2. Cylinder connecting plate; 3. L-shaped plate (support base); 31. Horizontal arm; 32. Vertical arm; 39. Bolt; 4. Housing; 400. Inner cavity of the housing; 401. Positioning cone hole; 41. Annular flange; 5. Positioning cone; 501. Connecting hole; 502. Circular cavity; 6. Mandrel; 601. Threaded hole; 7. Spring; 8. Mounting base; 801. Mounting slot; 802. Annular groove; 9. Vibration sensor. Detailed Implementation

[0025] To make the objectives, technical solutions, and effects of this utility model clearer and more explicit, the present utility model is further described in detail below. It should be understood that the specific embodiments described herein are merely for explaining this utility model and are not intended to limit this utility model.

[0026] Please see Figures 1 to 8This utility model provides an elastic connector for a vibration sensor. The accompanying drawings are for illustrative purposes only and are not to scale with actual products. The drawings only depict structures relevant to the innovation of this application; some conventional structures are not specifically shown. Figure 3 and Figure 4 The image is a longitudinal section along the axis of the vibration sensor's elastic connector to show the assembly relationship and structural details of key components such as the spindle, spring, and positioning cone inside the device.

[0027] For ease of explanation, this article inevitably uses some directional terms. "Front" in this article refers to the direction towards the vibration sensor, and "back" refers to the direction away from the vibration sensor.

[0028] The vibration sensor elastic connector includes a housing 4, within which a spindle 6 is disposed. The spindle axially penetrates the housing and is movable axially within the housing. A mounting base 8 is disposed at the front end of the spindle, and a mounting groove 801 for mounting a vibration sensor 9 is disposed on the outer side of the mounting base (e.g., Figure 7 As shown in the diagram, a spring 7 is fitted onto the spindle, with one end of the spring abutting against the mounting base and the other end abutting against the housing. The vibration sensor elastic connector also includes a drive device 1 for driving the housing to move along the axis. The specific shape of the mounting groove is not limited here; the shape of the mounting groove only needs to meet the installation requirements of the vibration sensor.

[0029] For ease of understanding, vibration sensor 9 is shown in the figure, but vibration sensor 9 itself is not within the scope of protection of this application.

[0030] Preferably, the spindle 6 and the housing 4 are coaxially arranged. The advantages of the spindle and housing being coaxially arranged are: (1) It ensures that the spindle is subjected to uniform force when it moves axially in the housing, avoiding uneven wear or jamming caused by different axes, ensuring the smoothness and stability of the spindle movement, so that the vibration sensor can stably follow the spindle movement and always keep in contact with the surface of the device under test. (2) It makes the spring force act uniformly on the mounting base and housing along the axial direction, avoiding the spring from generating lateral force due to force deviation, reducing the torsional deformation of the spring, extending the service life of the spring, and ensuring the stability of the preload force of the spring on the vibration sensor, ensuring the consistency of contact pressure during the detection process. (3) It is beneficial that when the drive device drives the housing to move along the axis, the force direction of the entire structure is consistent with the axis, avoiding the generation of additional torque, reducing the stress concentration of each connecting part, and improving the reliability and durability of the overall structure.

[0031] like Figure 6As shown, the mounting base 8 has an annular groove 802 on its inner side, and the inner cavity 400 of the housing has an annular flange 41. The front end of the spring 7 extends into the annular groove 802, and the rear end of the spring 7 abuts against the annular flange 41. The annular groove 802 provides a stable receiving space for one end of the spring, while the annular flange 41 provides a stable support reference for the other end of the spring. The cooperation of the two can strictly limit the axial installation position of the spring, avoid axial displacement or tilting of the spring during the movement of the spindle or vibration of the equipment, and ensure that the spring is always subjected to force along the axial direction of the spindle.

[0032] Specifically, the inner diameter of the annular groove 802 is clearance-fitted with the outer diameter of the spring. Simultaneously, the depth of the annular groove is at least 1.5 times the wire diameter of the spring to ensure that the front end of the spring can be smoothly inserted into the annular groove. The end face of the annular flange facing the spring is flat, its outer diameter is larger than the outer diameter of the spring, and the radial width of the annular flange is not less than twice the wire diameter of the spring to ensure effective contact between the rear end of the spring and the end face of the annular flange.

[0033] like Figure 3 and Figure 4 As shown, furthermore, a positioning cone 5 is connected to the rear end of the mandrel 6, and a positioning cone hole 401 is provided at the rear end of the inner cavity 400 of the housing (i.e., the positioning cone hole is part of the rear end of the inner cavity). The shapes of the positioning cone and the positioning cone hole are adapted to each other. By the matching positioning cone and positioning cone hole, the position of the mandrel in the housing is precisely limited each time the mandrel moves forward and resets, preventing radial or axial offset, thereby ensuring the accuracy of the contact position between the vibration sensor and the device under test. It can be understood that the positioning cone hole and the positioning cone are not complete conical shapes, but rather truncated conical shapes. The taper range of the positioning cone is preferably 1:10 to 1:20, and the taper of the positioning cone hole is consistent with the taper of the positioning cone.

[0034] Furthermore, the positioning cone 5 and the mandrel 6 are coaxially arranged. The coaxial arrangement of the positioning cone and the mandrel ensures good synchronization during axial movement, avoids relative offset due to misalignment, and thus ensures that the vibration sensor can always move along the predetermined trajectory and maintain stable and accurate contact with the surface of the device under test.

[0035] like Figure 8As shown, the positioning cone 5 further includes a circular cavity 502 at its front end, into which the rear end of the mandrel is inserted. This circular cavity provides precise positioning for the rear end of the mandrel. Combined with the coaxial arrangement of the positioning cone and the mandrel, this further ensures the coaxiality of their assembly, preventing radial wobble during mandrel movement and ensuring stable operation of the vibration sensor. Furthermore, the insertion fit between the circular cavity and the rear end of the mandrel enhances the stability of their connection. The circular cavity simplifies the assembly process, provides a clear alignment reference for mandrel installation, reduces assembly errors, and ensures connection accuracy.

[0036] like Figure 4 As shown, further, the rear end of the mandrel 6 has an axially threaded hole 601, and the positioning cone 5 has an axially connected hole 501. A locking bolt passes through the connected hole of the positioning cone and is screwed into the threaded hole at the rear end of the mandrel. By passing the locking bolt through the connected hole of the positioning cone and screwing it into the threaded hole at the rear end of the mandrel, the positioning cone and the mandrel are firmly connected as a whole, preventing relative displacement under axial force or vibration. The detachable nature of the bolted connection makes the assembly, disassembly, and subsequent replacement and maintenance of the positioning cone and the mandrel more convenient, reducing maintenance costs and operational difficulty. In actual assembly, first, the spring is placed on the mandrel, the mandrel is inserted from the front end of the housing, and the positioning cone is inserted from the rear end of the housing, so that the rear end of the mandrel is inserted into the circular cavity at the front end of the positioning cone. Then, the positioning cone and the mandrel are connected and fixed with the locking bolt.

[0037] Furthermore, the driving device 1 is a cylinder. Using a cylinder as the driving device can provide a stable axial driving force, enabling precise movement of the housing along the axis, meeting the fitting requirements of the vibration sensor and the device under test, and providing rapid response and convenient control.

[0038] Furthermore, a support base is fixedly connected to the housing, and a cylinder connecting plate 2 is provided at the front end of the piston rod 11 of the cylinder, which is connected to the support base. The connection between the support base and the cylinder connecting plate establishes a stable path for the transmission of the cylinder driving force to the housing, ensuring that the force exerted by the cylinder during driving is accurately transmitted axially to the housing, making the housing's movement along the axis smoother and more reliable. Simultaneously, the support base provides effective support to the housing, enhancing its structural stability during movement and reducing housing sway caused by driving force or equipment vibration, thereby ensuring the consistency of the contact state between the vibration sensor and the measured equipment.

[0039] Furthermore, the support base includes two L-shaped plates 3 arranged opposite each other. The horizontal arm 31 of each L-shaped plate is connected to the cylinder connecting plate by bolts (not shown in the figure), and the vertical arm 32 of each L-shaped plate is connected to the housing by bolts 39. The two L-shaped plates arranged opposite each other form a symmetrical support structure. Through the bolt connection between the horizontal arm and the cylinder connecting plate, and the vertical arm and the housing, the driving force of the cylinder can be evenly transmitted to the housing, avoiding the housing from being deviated by force and ensuring its stable axial movement. The segmented design of the L-shaped plates and the bolt connection method facilitate the individual processing, installation and debugging of components, reducing the assembly difficulty. In addition, the oppositely arranged L-shaped plates, while ensuring stable support for the housing and the cylinder connecting plate, reduce the redundant weight of the overall structure, taking into account both the support rigidity and lightweight requirements, making it suitable for long-term use in vibration environments.

[0040] As can be seen from the attached diagram, the vertical arms of each L-shaped plate are connected to the housing by three bolts 39. The three bolts form a stable triangular force-bearing structure, which makes the supporting force on the housing more evenly distributed and avoids radial displacement of the housing due to force skew, thereby maintaining the stability of the contact between the vibration sensor and the device under test.

[0041] like Figure 5 As shown, furthermore, the rear ends of the two L-shaped plates 3 are flush, and the rear ends of the L-shaped plates 3 extend rearward relative to the rear end of the positioning cone 5. When the cylinder piston rod 11 is not extended, the distance H between the rear ends of the L-shaped plates and the rear ends of the positioning cone is greater than the maximum stroke of the mandrel moving axially within the housing. This arrangement provides sufficient space for the positioning cone to move axially with the mandrel, preventing the rear ends of the positioning cone from colliding or rubbing against the rear ends of the L-shaped plates when the mandrel moves within its maximum stroke range, thus ensuring that the mandrel's movement is unimpeded.

[0042] It should be noted that in practical applications, the vibration sensor elastic connector can be mounted on a robotic arm or other mechanism to achieve automatic detection; this is not a limitation here.

[0043] The working principle of the elastic connector of the vibration sensor is as follows: (1) In the initial state (e.g.) Figure 1 and Figure 3 As shown), the piston rod 11 of the cylinder is not extended, the spring 7 is in its natural state, and the spindle 6 is unable to move backward due to the resistance of the spring, but is in a forward-extending state. At this time, the positioning cone 5 is exactly in contact with the positioning cone hole 401 (as shown). Figure 5 (As shown).

[0044] (2) Before testing, the vibration sensor installed at the front end of the mandrel can be brought into contact with the testing position on the device under test (not shown in the figure) by means of a robotic arm or other means.

[0045] (3) The cylinder piston rod 11 extends forward, pushing the support seat 3 connected to the cylinder connecting plate, thereby driving the housing 4 to move forward. Since the vibration sensor has already contacted the measured surface in the previous step, the forward movement of the housing will compress the spring (the spindle moves backward relative to the housing). The spring is compressed and generates elastic force, which acts on the spindle, ensuring that the vibration sensor is always in close contact with the measured surface, ensuring the stability of the contact force during the detection process. At the same time, the spring also has a buffering function. When the equipment operates and generates vibration or there are slight unevennesses on the measured surface, the elastic deformation of the spring can absorb these vibrations and displacements, avoiding drastic fluctuations in the contact force between the sensor and the measured surface, thereby protecting the sensor and the measured equipment, and ensuring the accuracy and reliability of the vibration detection data.

[0046] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. It is understood that those skilled in the art can make equivalent substitutions or modifications based on the technical solution and inventive concept of the present utility model, and all such modifications or substitutions should fall within the protection scope of the present utility model.

Claims

1. A vibration sensor elastic connector, comprising a housing, characterized in that: A spindle is provided inside the housing, which passes through the housing axially and can move axially within the housing; a mounting base is provided at the front end of the spindle, and a mounting groove for mounting a vibration sensor is provided on the outer side of the mounting base; a spring is sleeved on the spindle, one end of the spring abuts against the mounting base, and the other end of the spring abuts against the housing; the vibration sensor elastic connector also includes a drive device for driving the housing to move along the axis.

2. The vibration sensor elastic connector according to claim 1, characterized in that: The mounting base has an annular groove on its inner side and an annular flange in the inner cavity of the housing; the front end of the spring extends into the annular groove and the rear end of the spring abuts against the annular flange.

3. The vibration sensor elastic connector according to claim 1, characterized in that: The rear end of the mandrel is connected to a positioning cone, and the rear end of the inner cavity of the housing is provided with a positioning cone hole, the shapes of the positioning cone and the positioning cone hole being compatible.

4. The vibration sensor elastic connector according to claim 1, characterized in that: The positioning cone and the mandrel are set coaxially.

5. The vibration sensor elastic connector according to claim 4, characterized in that: The front end of the positioning cone has a circular cavity, and the rear end of the mandrel is inserted into the circular cavity.

6. The vibration sensor elastic connector according to claim 4, characterized in that: The mandrel has a threaded hole axially at its rear end, and the positioning cone has a connecting hole axially. The connecting hole passes through the locking bolt and is screwed into the threaded hole.

7. The vibration sensor elastic connector according to claim 3, characterized in that: The driving device is a cylinder.

8. The vibration sensor elastic connector according to claim 7, characterized in that: The housing is fixedly connected to a support base, and a cylinder connecting plate is provided at the front end of the piston rod of the cylinder, which is connected to the support base.

9. The vibration sensor elastic connector according to claim 8, characterized in that: The support base includes two L-shaped plates arranged opposite each other. The horizontal arm of each L-shaped plate is connected to the cylinder connecting plate by bolts, and the vertical arm of each L-shaped plate is connected to the housing by bolts.

10. The vibration sensor elastic connector according to claim 9, characterized in that: The rear ends of the two L-shaped plates are flush, and the rear ends of the L-shaped plates extend backward relative to the rear end of the positioning cone. When the cylinder piston rod is not extended, the distance between the rear ends of the L-shaped plates and the rear ends of the positioning cone is greater than the maximum stroke of the mandrel moving axially within the housing.

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