Crystal oscillator damping device

Abstract

The invention discloses a crystal oscillator damping device which comprises an anti-vibration shell, an end cover and a damping part, the top of the anti-vibration shell is detachably provided with the end cover used for sealing the anti-vibration shell, a crystal is arranged in the anti-vibration shell, and the crystal is fixed in the anti-vibration shell through the damping part; the vibration reduction parts comprise a first vibration reduction part and a second vibration reduction part, and the first vibration reduction part and the second vibration reduction part oppositely cover the crystal from any two opposite end surfaces of the crystal respectively and then are fixedly connected with the inner wall of the vibration-proof shell; the problems that the stability and precision of the output frequency of the crystal oscillator are reduced, the phase noise is deteriorated, the structure and installation are complex and the like due to mechanical vibration are effectively solved, the environmental adaptability of the crystal oscillator is further improved, and the service life of the crystal oscillator is further prolonged.

Description

Technical Field

[0001] The present invention relates to the field of crystal oscillator vibration damping structures, and in particular to a crystal oscillator vibration damping device. Background Art

[0002] A crystal oscillator, i.e., a quartz crystal resonator, is one of the most commonly used electronic components in electronic circuits and is composed of a crystal and peripheral components. When an appropriate alternating voltage is applied to the crystal electrodes, the crystal will generate resonance (the resonance frequency is related to the inclination angle of the quartz inclined plane, etc., and the frequency is fixed). In the resonance state, the crystal oscillator can provide a stable and accurate single-frequency oscillation externally.

[0003] When the crystal oscillator works in a vibrating environment, the crystal is affected by external mechanical vibrations, and its shape and size will change. At the same time, the mechanical vibrations cause the internal components of the crystal oscillator to loosen or displace, resulting in changes in the charge distribution and electric field inside the crystal oscillator. After being amplified by the amplifier, these changes are fed back to the crystal through the feedback network, and the output frequency of the crystal oscillator will generate a discrete spectrum, introducing mechanical vibration frequency modulation sidebands, thereby causing the stability and accuracy of the output frequency of the crystal oscillator to decrease and deteriorating the phase noise.

[0004] Since the general crystal oscillator weighs only about 10 g, the vibration damping structure needs to be very light. The existing main vibration damping methods are to use rubber vibration damping or directly suspend the circuit board high with steel wire ropes for vibration damping, both of which have problems such as unsatisfactory effects, unstable vibration damping, and complex installation, and cannot meet the expected indicators. In view of the above problems, this application proposes a solution. Summary of the Invention

[0005] Object of the Invention: The object of the present invention is to provide a crystal oscillator vibration damping device with a simple and stable structure, convenient installation, improved vibration damping effect on the crystal oscillator, thereby improving the stability of the output frequency of the crystal oscillator and increasing the service life of the crystal oscillator.

[0006] Technical Solution: A crystal oscillator vibration damping device according to the present invention includes a vibration-resistant housing, an end cover, and a vibration damping member; an end cover for sealing the vibration-resistant housing is detachably provided at the top of the vibration-resistant housing, and a crystal is provided inside the vibration-resistant housing, and the crystal is fixed inside the vibration-resistant housing through the vibration damping member;

[0007] The vibration damping member includes a first vibration damping member and a second vibration damping member. After the first vibration damping member and the second vibration damping member respectively wrap the crystal from two opposite end faces of the crystal, they are fixedly connected to the inner wall of the vibration-resistant housing.

[0008] Preferably, an output signal hole and an input signal hole are provided on any one end face of the vibration-resistant housing, and the output signal hole and the input signal hole are set with holes of different sizes that are easy to distinguish.

[0009] Preferably, the bottom of the anti-vibration housing is provided with a first bolt hole. After the bolts pass through the first bolt hole, the anti-vibration housing is fixed on the workbench surface.

[0010] Preferably, the top of the anti-vibration housing is provided with a second bolt hole for bolt connection with the end cover.

[0011] Preferably, the end cover is provided with a third bolt hole for bolt connection with the top of the anti-vibration housing.

[0012] Preferably, the first shock-absorbing member includes a first wrapping surface, a second wrapping surface, a third wrapping surface, a fourth wrapping surface, and a fifth wrapping surface. The size of the first wrapping surface is not less than any one end face of the crystal. The second wrapping surface, the third wrapping surface, the fourth wrapping surface, and the fifth wrapping surface are respectively connected to four orientations at the edge of the first wrapping surface, and the centers of the second wrapping surface, the third wrapping surface, the fourth wrapping surface, and the fifth wrapping surface are hollowed out with openings.

[0013] Preferably, the end face of the first wrapping surface is fixedly connected to the end face of the crystal, and the ends of the second wrapping surface, the third wrapping surface, the fourth wrapping surface, and the fifth wrapping surface are fixedly connected to the inner wall of the anti-vibration housing.

[0014] Preferably, the second shock-absorbing member includes a sixth wrapping surface, a seventh wrapping surface, an eighth wrapping surface, a ninth wrapping surface, and a tenth wrapping surface. The size of the sixth wrapping surface is not less than any one end face of the crystal. The seventh wrapping surface, the eighth wrapping surface, the ninth wrapping surface, and the tenth wrapping surface are respectively connected to four orientations at the edge of the sixth wrapping surface, and the ends of the seventh wrapping surface, the eighth wrapping surface, the ninth wrapping surface, and the tenth wrapping surface pass through the first shock-absorbing member arranged oppositely.

[0015] Preferably, the sixth wrapping surface is fixedly connected to the end face of the crystal, and the ends of the seventh wrapping surface, the eighth wrapping surface, the ninth wrapping surface, and the tenth wrapping surface are fixedly connected to the inner wall of the anti-vibration housing.

[0016] Preferably, the anti-vibration housing, the end cover, and the shock-absorbing body are all made of vibration-suppressing alloy with the material of DMnCu20Ni5Fe2. The thickness of the shock-absorbing member is 0.1 mm, which is obtained by bending after cutting or trimming from the plate through the flat development drawing of the structure.

[0017] Beneficial effects: Compared with the prior art, the present invention has the following remarkable advantages:

[0018] (1) The present invention effectively solves the problems such as the decline of the output frequency stability and accuracy of the crystal oscillator caused by mechanical vibration, the deterioration of phase noise, and the complexity of the structure and installation, and further improves the environmental adaptability and service life of the crystal oscillator.

[0019] (2) The shock-absorbing member, anti-vibration housing, and lid in the present invention are all made of DMnCu20Ni5Fe2 vibration-suppressing alloy. The vibration-suppressing alloy material has the same rubber damping characteristics and the strength of structural steel.

[0020] (3) The shock-absorbing member in the present invention has the effect of vertical and lateral shock absorption through the combined fixing method of wrapping the crystal oscillator in opposite directions, with good shock absorption effect and strong adaptability.

[0021] (4) The shock-absorbing member in the present invention is a sheet metal part, with simple production and processing methods, low cost, and is convenient for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an axonometric view of the overall structure of the present invention.

[0023] Figure 2 It is an axonometric view of the overall structure of the present invention after removing the end cap.

[0024] Figure 3 It is a top view of the present invention after removing the end cap.

[0025] Figure 4 It is an axonometric view of the structure of the shock-absorbing member of the present invention.

[0026] Figure 5 It is an axonometric view of the structure of the first shock-absorbing member in the present invention.

[0027] Figure 6 It is a flat unfolded view of the first shock-absorbing member in the present invention.

[0028] Figure 7 It is an axonometric view of the structure of the second shock-absorbing member in the present invention.

[0029] Figure 8 It is a flat unfolded view of the second shock-absorbing member in the present invention.

[0030] Wherein: 100, anti-vibration housing; 200, end cap; 300, shock-absorbing member; 101, output signal hole; 102, input signal hole; 103, first bolt hole; 104, second bolt hole; 201, third bolt hole; 310, first shock-absorbing member; 311, first wrapping surface; 312, second wrapping surface; 313, third wrapping surface; 314, fourth wrapping surface; 315, fifth wrapping surface; 320, second shock-absorbing member; 321, sixth wrapping surface; 322, seventh wrapping surface; 323, eighth wrapping surface; 324, ninth wrapping surface; 325, tenth wrapping surface. DETAILED DESCRIPTION OF THE INVENTION

[0031] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0032] See attachedFigures 1 to 8 Figure, the crystal oscillator damping device shown in the present invention includes a vibration-resistant housing 100, an end cap 200, and a damping member 300. Among them, the end cap 200 for sealing the vibration-resistant housing 100 is detachably arranged on the top of the vibration-resistant housing 100, and a crystal is arranged inside the vibration-resistant housing 200. The crystal is fixed inside the vibration-resistant housing 100 through the damping member 300.

[0033] In this embodiment, an output signal hole 101 and an input signal hole 102 are arranged on any one end face of the vibration-resistant housing 100. Among them, the output signal hole 101 adopts a large hole structure, and the output signal hole 102 adopts a small hole structure, which is convenient for distinction.

[0034] In this embodiment, a first bolt hole 103 is arranged at the bottom of the vibration-resistant housing 100. After the bolt passes through the first bolt hole 103, the vibration-resistant housing 100 is fixed on the workbench surface.

[0035] In this embodiment, a second bolt hole 104 is arranged at the top of the vibration-resistant housing 100, and a third bolt hole 201 is arranged on the end cap 200. The second bolt hole 104 and the third bolt hole 201 are arranged in one-to-one correspondence. The vibration-resistant housing 100 and the end cap 200 are fixedly connected by bolts passing through the second bolt hole 104 and the third bolt hole 201.

[0036] In this embodiment, the damping member 300 includes a first damping member 310 and a second damping member 320. After the first damping member 310 and the second damping member 320 respectively cover the crystal from the two end faces above and below the crystal, they are fixedly connected to the inner wall of the vibration-resistant housing 100.

[0037] In this embodiment, the first damping member 310 includes a first wrapping surface 311, a second wrapping surface 312, a third wrapping surface 313, a fourth wrapping surface 314, and a fifth wrapping surface 315. Among them, the size of the first wrapping surface 311 is not less than the upper end face of the crystal. The second wrapping surface 312, the third wrapping surface 313, the fourth wrapping surface 314, and the fifth wrapping surface 315 are respectively connected to the four orientations at the edge of the first wrapping surface 311, and openings are hollowed out at the centers of the second wrapping surface 312, the third wrapping surface 313, the fourth wrapping surface 314, and the fifth wrapping surface 315.

[0038] The end face of the first wrapping surface 311 is fixedly connected to the end face of the crystal, and the ends of the second wrapping surface 312, the third wrapping surface 313, the fourth wrapping surface 314, and the fifth wrapping surface 315 are fixedly connected to the bottom of the vibration-resistant housing.

[0039] In this embodiment, the second vibration damping member 320 includes a sixth wrapping surface 321, a seventh wrapping surface 322, an eighth wrapping surface 323, a ninth wrapping surface 324, and a tenth wrapping surface 325. The size of the sixth wrapping surface 321 is not less than the lower end face of the crystal. The seventh wrapping surface 322, the eighth wrapping surface 323, the ninth wrapping surface 324, and the tenth wrapping surface 325 are respectively connected to four orientations at the edge of the sixth wrapping surface 321. The ends of the seventh wrapping surface 322, the eighth wrapping surface 323, the ninth wrapping surface 324, and the tenth wrapping surface 325 pass through the first vibration damping member 310 arranged oppositely.

[0040] A fixed connection is provided between the sixth wrapping surface 321 and the end face of the crystal. The ends of the seventh wrapping surface 322, the eighth wrapping surface 323, the ninth wrapping surface 324, and the tenth wrapping surface 325 are fixedly connected to the inner wall of the end cover 200.

[0041] In this embodiment, after the ends of the seventh wrapping surface 322, the eighth wrapping surface 323, the ninth wrapping surface 324, and the tenth wrapping surface 325 in the second vibration damping member 320 respectively pass through the openings in the centers of the hollowed-out second wrapping surface 312, the third wrapping surface 313, the fourth wrapping surface 314, and the fifth wrapping surface 315 in the first vibration damping member 310, the crystal oscillator is wrapped inside the vibration damping member 300. Based on the vibration isolation principle, the vibration damping member 300 itself has a certain amount of deformation during installation. During the working process, when the anti-vibration housing 100 is subjected to external excitation, when the vibration is transmitted through the vibration damping member 300, transverse and longitudinal extrusion and stretching occur in the second wrapping surface 312, the third wrapping surface 313, the fourth wrapping surface 314, the fifth wrapping surface 315, the seventh wrapping surface 322, the eighth wrapping surface 323, the ninth wrapping surface 324, and the tenth wrapping surface 325 of the first vibration damping member 310 and the second vibration damping member 320. The vibration damping member 300 generates hysteretic deformation to dissipate energy, thereby absorbing vibration stress, offsetting and reducing the vibration on this transmission path, and thus achieving structural vibration damping in the horizontal and vertical directions of the crystal oscillator.

[0042] In this embodiment, the vibration damping member 300 is fixed to the anti-vibration housing 100, the end cover 200, and the crystal by potting glue.

[0043] In this embodiment, the anti-vibration housing 100, the end cover 200, and the vibration damping body 300 are all made of vibration damping alloy with the material of DMnCu20Ni5Fe2. The DMnCu20Ni5Fe2 vibration damping alloy material has the same rubber damping characteristics and the strength of structural steel, and consumes the energy generated by vibration through the generation and movement of twins inside, so as to achieve the purpose of vibration damping.

[0044] The thickness of the vibration damping member 300 is 0.1 mm, which is obtained by cutting or trimming from a plate according to the flat development drawing of the structure and then performing a bending process.

[0045] After experiments, it is proved that the vibration reduction effect of the root mean square (RMS) value of acceleration within 0 - 2000 Hz reaches more than 50% both vertically and horizontally.

[0046] The above embodiments are only illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A crystal oscillator vibration reduction device, characterized in that: It comprises an anti-vibration shell, an end cover and a vibration damping member; the top of the anti-vibration shell is detachably provided with an end cover for sealing the anti-vibration shell, a crystal is provided inside the anti-vibration shell, and the crystal is fixed inside the anti-vibration shell through the vibration damping member; The vibration damper comprises a first vibration damper and a second vibration damper. The first vibration damper and the second vibration damper respectively cover the crystal from any two opposite end faces of the crystal and are fixedly connected to the inner wall of the vibration-proof housing.

2. A crystal oscillator vibration reduction device according to claim 1, characterized in that: An output signal hole and an input signal hole are arranged on any one side end surface of the anti-vibration housing, and the output signal hole and the input signal hole are arranged in a manner of easily distinguishable large and small holes.

3. The crystal oscillator vibration reduction device according to claim 1, characterized in that: The bottom of the anti-vibration housing is provided with a first bolt hole, and the anti-vibration housing is fixed on the workbench after a bolt passes through the first bolt hole.

4. The crystal oscillator vibration reduction device according to claim 1, characterized in that: The top of the anti-vibration housing is provided with a second bolt hole for bolt connection with the end cover.

5. The crystal oscillator vibration reduction device according to claim 1, characterized in that: The end cover is provided with a third bolt hole for bolting with the top of the anti-vibration premise.

6. The crystal oscillator vibration reduction device according to claim 1, characterized in that: The first vibration damping member includes a first wrapping surface, a second wrapping surface, a third wrapping surface, a fourth wrapping surface and a fifth wrapping surface. The size of the first wrapping surface is not smaller than any side end surface of the crystal. The second wrapping surface, the third wrapping surface, the fourth wrapping surface and the fifth wrapping surface are respectively connected to four directions of the edge of the first wrapping surface. The centers of the second wrapping surface, the third wrapping surface, the fourth wrapping surface and the fifth wrapping surface are hollowed out with openings.

7. A crystal oscillator vibration reduction device according to claim 6, characterized in that: The end surface of the first wrapping surface is fixedly connected to the end surface of the crystal, and the ends of the second wrapping surface, the third wrapping surface, the fourth wrapping surface and the fifth wrapping surface are fixedly connected to the inner wall of the vibration-proof housing.

8. The crystal oscillator vibration reduction device according to claim 1, characterized in that: The second vibration damper includes a sixth wrapping surface, a seventh wrapping surface, an eighth wrapping surface, a ninth wrapping surface and a tenth wrapping surface, the size of the sixth wrapping surface is not less than one side end surface of the crystal, the seventh wrapping surface, the eighth wrapping surface, the ninth wrapping surface and the tenth wrapping surface are respectively connected to four directions of the edge of the sixth wrapping surface, and the ends of the seventh wrapping surface, the eighth wrapping surface, the ninth wrapping surface and the tenth wrapping surface pass through the first vibration damper arranged opposite to each other.

9. A crystal oscillator vibration reduction device according to claim 8, characterized in that: The sixth wrapping surface is fixedly connected to the end surface of the crystal, and the ends of the seventh wrapping surface, the eighth wrapping surface, the ninth wrapping surface and the tenth wrapping surface are fixedly connected to the inner wall of the vibration-proof housing.

10. The crystal oscillator vibration reduction device according to claim 1, characterized in that: The anti-vibration housing, end cover and vibration damping body are all made of a vibration damping alloy of DMnCu20Ni5Fe2. The thickness of the vibration damping part is 0.1 mm. It is obtained by cutting or trimming the plate through a flat plate unfolding diagram of the structure and then bending it.

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