Elastic structure for fixing acceleration sensor

Abstract

The utility model relates to the technical field of sensor assembly, in particular to an elastic structure for fixing an acceleration sensor. The buffer device is used for being connected between an air cylinder and an acceleration sensor and comprises an air cylinder fixing clamping block, a sensor fixing clamping block, a spring and buffer rods, the air cylinder fixing clamping block is connected to the air cylinder, the sensor fixing clamping block is connected to the acceleration sensor, and the buffer rods are connected into the air cylinder fixing clamping block and the sensor fixing clamping block. The two ends of the spring are connected with the air cylinder fixing clamping block and the sensor fixing clamping block respectively and sleeve the buffer rod. According to the utility model, stable and fatigue-resistant fixation of the acceleration sensor on the compressor fixed-frequency automatic detection equipment is realized, and meanwhile, the fixation mode is ensured not to generate negative influence on a fixed-frequency detection result; the problems that in the prior art, a sensor is unstable in fixation, prone to falling off, inaccurate in position, poor in material fatigue resistance and the like are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sensor assembly, in particular to an elastic structure for fixing an acceleration sensor. Background Art

[0002] As people's requirements for air-conditioning noise become higher and higher, an indicator with a very high correlation with noise is the natural frequency of the air-conditioning compressor reservoir. The demand for automated testing of fixed frequency scenarios is increasing. The previous corresponding detection method for automated compressor fixed frequency detection equipment is to extract samples and manually tap with a force hammer to detect the fixed frequency. The accelerometer is manually placed on the side of the compressor reservoir, and then the frequency response result is obtained by tapping with a force hammer, reflecting the natural frequency index of the compressor reservoir. The natural frequency of the compressor reservoir is divided into lateral fixed frequency and axial fixed frequency, so a multi-directional accelerometer is needed. The automated fixed sensor needs to include a structure that can constrain the position of the accelerometer without affecting the fixed frequency test index of the test piece.

[0003] The prior art has the following problems and defects when fixing the acceleration sensor:

[0004] 1. The method of using a fixture to clamp and release the sensor relies on the self-adsorption ability of the product. This method lacks effective constraints on the sensor and can easily cause the sensor to fall off or the fitting position to be inaccurate during the test, affecting the reliability of the test results.

[0005] 2. Design a structure including springs and tunnels to perform lateral fixed frequency detection. This method is effective in unidirectional fixed frequency testing, but when installing a three-axis acceleration sensor to perform lateral and axial fixed frequency detection at the same time, the tunnel structure will interfere with the axial vibration, resulting in abnormal axial fixed frequency test results.

[0006] 3. Using cable ties or elastic steel wires to fix the sensor meets the requirements in terms of sensor constraints and test results, but these materials have limited fatigue resistance. Under high-frequency bonding operations (such as tens of thousands of times a day), these materials are prone to breakage, resulting in failure of sensor fixation. Utility Model Content

[0007] The utility model provides an elastic structure for fixing an acceleration sensor, aiming to solve the defects of the existing acceleration sensor fixing method.

[0008] The utility model provides an elastic structure for fixing an acceleration sensor, which is used for connecting between a cylinder and the acceleration sensor, and comprises a cylinder fixing clamp block, a sensor fixing clamp block, a spring and a buffer rod. The cylinder fixing clamp block is connected to the cylinder, and the sensor fixing clamp block is connected to the acceleration sensor. The cylinder fixing clamp block and the sensor fixing clamp block are both connected with a buffer rod, and the two ends of the spring are respectively connected to the cylinder fixing clamp block and the sensor fixing clamp block and are sleeved on the outside of the buffer rod.

[0009] As a further improvement of the utility model, the cylinder fixing clamp block includes an upper clamp block at the cylinder end and a lower clamp block at the cylinder end, the lower clamp block at the cylinder end is connected to one end of the cylinder, the upper clamp block at the cylinder end is connected to the lower clamp block at the cylinder end, the upper clamp block at the cylinder end and the lower clamp block at the cylinder end are both provided with an arc-shaped groove, the buffer rod is arranged in the arc-shaped groove, and the spring is clamped in the arc-shaped groove.

[0010] As a further improvement of the utility model, the elastic structure for fixing the acceleration sensor also includes a buffer ring, which is connected to the outlets of the arc-shaped grooves of the upper clamping block and the lower clamping block at the cylinder end, and the buffer rod and the spring pass through the buffer ring.

[0011] As a further improvement of the utility model, the sensor fixing clamp block includes an upper clamp block at the sensor end and a lower clamp block at the sensor end, the lower clamp block at the sensor end is connected to one end of the sensor, the upper clamp block at the sensor end is connected to the lower clamp block at the sensor end, the upper clamp block at the sensor end and the lower clamp block at the sensor end are both provided with an arc-shaped groove, the buffer rod is arranged in the arc-shaped groove, and the spring is clamped in the arc-shaped groove.

[0012] As a further improvement of the utility model, the elastic structure for fixing the acceleration sensor also includes a buffer ring, which is connected to the outlets of the arc-shaped grooves of the upper clamping block and the lower clamping block at the sensor end, and the buffer rod and the spring pass through the buffer ring.

[0013] As a further improvement of the utility model, one end of the buffer rod is connected to the cylinder fixing clamp block, and the other end of the buffer rod extends outward to protrude from the cylinder fixing clamp block; or one end of the buffer rod is connected to the sensor fixing clamp block, and the other end of the buffer rod extends outward to protrude from the sensor fixing clamp block.

[0014] As a further improvement of the present invention, the buffer rod is made of hot melt adhesive.

[0015] As a further improvement of the utility model, the spring adopts a piano spring.

[0016] The beneficial effects of the utility model are: achieving stable and fatigue-resistant fixation of the acceleration sensor on the compressor fixed frequency automatic detection equipment, while ensuring that the fixing method does not have a negative impact on the fixed frequency detection result. Solving the problems of unstable sensor fixation, easy falling, inaccurate position and poor material fatigue resistance in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the overall structural diagram of the elastic structure of the utility model for fixing the acceleration sensor;

[0018] Figure 2 It is a structural side view of the elastic structure for fixing the acceleration sensor of the utility model;

[0019] Figure 3 It is a structural explosion diagram of the elastic structure for fixing the acceleration sensor of the utility model. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0021] In the utility model, the elastic structure for fixing the acceleration sensor 2 is used for fixing the acceleration sensor 2 on the automatic fixed frequency detection device of the air-conditioning compressor.

[0022] Specifically, Figures 1 to 3 As shown, the utility model is an elastic structure for fixing the acceleration sensor 2, which is used to be connected between the cylinder 1 and the acceleration sensor 2, including a cylinder fixing clamp block 3, a sensor fixing clamp block 4, a spring 5, and a buffer rod 6. The cylinder fixing clamp block 3 is connected to the cylinder 1, and the sensor 2 is fixedly connected to the acceleration sensor 2. The cylinder fixing clamp block 3 and the sensor fixing clamp block 4 are both connected with buffer rods, and the two ends of the spring 5 are respectively connected to the cylinder fixing clamp block 3 and the sensor fixing clamp block 4 and are sleeved on the outside of the buffer rod 6.

[0023] The cylinder fixing clamp block 3 comprises an upper clamp block 31 at the cylinder end and a lower clamp block 32 at the cylinder end. The lower clamp block 32 at the cylinder end is connected to one end of the cylinder 1. The upper clamp block 31 at the cylinder end is connected to the lower clamp block 32 at the cylinder end. Both the upper clamp block 31 at the cylinder end and the lower clamp block 32 at the cylinder end are provided with an arc groove 8. The buffer rod 6 is arranged in the arc groove 8, and the spring 5 is clamped in the arc groove 8. The arc groove 8 of the upper clamp block 31 at the cylinder end and the arc groove 8 of the lower clamp block 32 at the cylinder end are aligned and connected to form a mounting through hole on the cylinder fixing clamp block 3. One end of the buffer rod 6 is fixed inside the cylinder fixing clamp block 3, and the other end extends outward through the mounting through hole, while the spring 5 is clamped in the mounting through hole of the cylinder fixing clamp block 3 for fixing.

[0024] The sensor fixing clamp block 4 includes an upper clamp block 41 at the sensor end and a lower clamp block 42 at the sensor end. The lower clamp block 42 at the sensor end is connected to one end of the sensor 2. The upper clamp block 41 at the sensor end is connected to the lower clamp block 42 at the sensor end. Both the upper clamp block 41 at the sensor end and the lower clamp block 42 at the sensor end are provided with an arc groove 8. The buffer rod 6 is arranged in the arc groove 8, and the spring 5 is clamped in the arc groove 8. The arc groove 8 of the upper clamp block 41 at the sensor end and the arc groove 8 of the lower clamp block 42 at the sensor end are aligned and connected to form a mounting through hole on the sensor fixing clamp block 4. One end of the buffer rod 6 is fixed inside the sensor fixing clamp block 4, and the other end extends outward through the mounting through hole, while the spring 5 is clamped in the mounting through hole of the sensor fixing clamp block 4 for fixing.

[0025] The spring 5 is fixed by directly clamping the spring 5 through the upper and lower clamping blocks. There is no single point of force, which is not easy to cause fatigue of the spring 5. The spring 5 has very little effect on the vibration of the acceleration sensor 2 in the up and down and left and right directions, and will not affect the vibration result test. From a structural point of view, it is to ensure the stability of the long-term automatic fixation of the sensor 2.

[0026] The elastic structure for fixing the acceleration sensor 2 also includes a buffer ring 7, which is connected to the outlet of the arc groove 8 of the upper clamp block 31 and the lower clamp block 32 at the cylinder end, and the buffer rod 6 and the spring 5 pass through the buffer ring 7; the buffer ring 7 is connected to the outlet of the arc groove 8 of the upper clamp block 41 and the lower clamp block 42 at the sensor end, and the buffer rod 6 and the spring 5 pass through the buffer ring 7. One end of the buffer rod 6 can extend to a position protruding from the buffer ring 7, so that the buffer rod 6 and the buffer ring 7 cooperate to protect the spring 5.

[0027] A buffer ring 7 is provided at the through hole outlet of the cylinder fixing clamp block 3 and the sensor fixing clamp block 4 as a transition piece, and a buffer transition is formed between the spring 5 and the cylinder fixing clamp block 3 or the sensor fixing clamp block 4, so as to avoid the hidden danger of the spring 5 being easily broken due to frequent rigid contact between the spring 5 and the edge of the cylinder fixing clamp block 3 or the sensor fixing clamp block 4 during the test. The buffer ring 7 can be made of soft material to fully protect the spring 5.

[0028] One end of the buffer rod 6 is connected to the cylinder fixing clamp block 3, and the other end of the buffer rod 6 extends outward to protrude from the cylinder fixing clamp block 3; or one end of the buffer rod 6 is connected to the sensor fixing clamp block 4, and the other end of the buffer rod 6 extends outward to protrude from the sensor fixing clamp block 4. The structure in which the other end of the buffer rod 6 extends outward and protrudes, combined with the structure in which the spring 5 is sleeved outside the buffer rod 6, can make the buffer rod 6 provide a longer distance for the spring 5 to provide buffer protection.

[0029] The material of the buffer rod 6 is hot melt adhesive. The connection between the cylinder fixing clamp block 3, the sensor fixing clamp block 4 and the spring 5 is buffered with hot melt adhesive to prevent the spring 5 from breaking due to long-term rigid friction between the contact point of the spring 5 and the fixing clamp block, so that the force on the contact point is more uniform.

[0030] The spring 5 is a piano steel spring 5. The sensor fixing clamp 4 and the cylinder fixing clamp 3 are connected by the piano steel spring 5. The piano steel is the best fatigue-resistant material for making the spring 5 at present, and the stability of the spring 5 is guaranteed from the material.

[0031] Before the acceleration sensor 2 was improved by the fixing structure of the utility model, the fixing material of the sensor 2 often broke under the 24-hour non-stop bombardment of the production line. After repeatedly summarizing the situation of the fixing material breaking, the following three reasons are summarized as likely to cause the material to break:

[0032] 1. Fatigue resistance of the material used;

[0033] 2. Is there a structure with a range of motion and single-point force on the structural fixation? If so, the force point is prone to fatigue;

[0034] 3. The thickness and diameter of the spring 5 require a large amount of modal data comparison to determine which size of spring 5 has negligible effect on vibration.

[0035] By adopting the fixing structure of the utility model, the problems of unstable fixing, easy falling, inaccurate position and poor material fatigue resistance of the sensor 2 in the prior art are solved. The acceleration sensor 2 can be stably and fatigue-resistantly fixed on the compressor fixed frequency automatic detection equipment, while ensuring that the fixing method will not have a negative impact on the fixed frequency detection result.

[0036] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An elastic structure for fixing an acceleration sensor, used to be connected between a cylinder and an acceleration sensor, characterized in that: It includes a cylinder fixing clamp block, a sensor fixing clamp block, a spring, and a buffer rod. The cylinder fixing clamp block is connected to the cylinder, and the sensor fixing clamp block is connected to the acceleration sensor. The cylinder fixing clamp block and the sensor fixing clamp block are both connected with a buffer rod. The two ends of the spring are respectively connected to the cylinder fixing clamp block and the sensor fixing clamp block and are sleeved on the outside of the buffer rod.

2. The elastic structure for fixing the acceleration sensor according to claim 1, characterized in that: The cylinder fixing clamp block includes an upper clamp block at the cylinder end and a lower clamp block at the cylinder end. The lower clamp block at the cylinder end is connected to one end of the cylinder. The upper clamp block at the cylinder end is connected to the lower clamp block at the cylinder end. Both the upper clamp block at the cylinder end and the lower clamp block at the cylinder end are provided with an arc-shaped groove. The buffer rod is arranged in the arc-shaped groove, and the spring is clamped in the arc-shaped groove.

3. The elastic structure for fixing the acceleration sensor according to claim 2, characterized in that: It also includes a buffer ring, which is connected to the outlets of the arc-shaped grooves of the upper clamping block at the cylinder end and the lower clamping block at the cylinder end, and the buffer rod and the spring pass through the buffer ring.

4. The elastic structure for fixing the acceleration sensor according to claim 1, characterized in that: The sensor fixing clamp block includes an upper clamp block at the sensor end and a lower clamp block at the sensor end. The lower clamp block at the sensor end is connected to one end of the sensor, and the upper clamp block at the sensor end is connected to the lower clamp block at the sensor end. Both the upper clamp block at the sensor end and the lower clamp block at the sensor end are provided with an arc groove, the buffer rod is arranged in the arc groove, and the spring is clamped in the arc groove.

5. The elastic structure for fixing the acceleration sensor according to claim 4, characterized in that: It also includes a buffer ring, which is connected to the outlets of the arc-shaped grooves of the upper clamping block at the sensor end and the lower clamping block at the sensor end, and the buffer rod and the spring pass through the buffer ring.

6. The elastic structure for fixing the acceleration sensor according to claim 1, characterized in that: One end of the buffer rod is connected to the cylinder fixing block, and the other end of the buffer rod extends outward to protrude from the cylinder fixing block; or one end of the buffer rod is connected to the sensor fixing block, and the other end of the buffer rod extends outward to protrude from the sensor fixing block.

7. The elastic structure for fixing the acceleration sensor according to claim 1, characterized in that: The material of the buffer rod is hot melt adhesive.

8. The elastic structure for fixing an acceleration sensor according to claim 1, characterized in that: The spring is a piano spring.

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