Zero-clearance worm gear grating tower structure for spectrograph

Abstract

The invention provides a zero-clearance worm gear grating tower structure for a spectrograph, and belongs to the technical field of spectrometers. The zero-clearance worm gear grating tower structure for the spectrograph comprises a shell, the main shaft is rotationally arranged on the shell; the worm is rotationally mounted on the shell, is positioned on one side of the main shaft, and is driven by a driving motor; the driving worm gear is arranged on the main shaft, and the driving worm gear is meshed with the worm; the driven worm gear is rotationally mounted on the main shaft, and the driven worm gear is meshed with the worm; the elastic component is configured to be used for pushing the driven worm gear to rotate so that the tooth surface of the worm can make contact with the tooth surfaces of the driving worm gear and the driven worm gear at the same time; the grating seat is mounted on the driving worm gear, and a plurality of grating lenses are mounted on the grating seat; the driven worm gear and the driving worm gear are meshed with the worm at different meshing phases. According to the zero-clearance worm gear grating tower structure for the spectrograph, tooth gaps among the driving worm gear, the driven worm gear and the worm are eliminated, and the positioning precision of the grating base is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of spectroscopic instruments, and particularly to a zero-clearance worm gear grating tower structure for a spectrometer. Background Art

[0002] In the field of spectrometers, a worm gear mechanism is often used to drive a grating to rotate for wavelength scanning and spectral analysis. However, the traditional worm gear drive has the following significant defects, severely restricting the accuracy and reliability of spectrometers: (1) The wavelength of light is on the nanometer scale. Even a meshing clearance (even only on the micrometer scale) between the worm gear and the worm can cause the deviation of the grating angle, and further lead to the deviation of the optical path. Therefore, high manufacturing precision requirements are imposed on the worm gear and the worm.

[0003] (2) During the transmission process of the worm gear and the worm, impact noise is easily generated due to the hard contact of the tooth surfaces, and at the same time, the friction between metal materials will cause tooth surface wear, resulting in low durability.

[0004] To solve the above problems, a zero-clearance worm gear grating tower structure for a spectrometer is designed. Summary of the Invention

[0005] The purpose of the present disclosure is to overcome the deficiencies of the above-mentioned prior art, and provide a zero-clearance worm gear grating tower structure for a spectrometer, so as to eliminate the backlash between the driving worm gear, the driven worm gear and the worm, and reduce the wear and noise of the worm gear drive.

[0006] To achieve the above invention purpose, the present disclosure adopts the following technical solutions: A zero-clearance worm gear grating tower structure for a spectrometer, including a housing, and further including: A main shaft, rotatably arranged on the housing; A worm, rotatably installed on the housing, the worm is located on one side of the main shaft, and the worm is driven by a driving motor; A driving worm gear, arranged on the main shaft, the driving worm gear meshes with the worm; A driven worm gear, rotatably installed on the main shaft, the driven worm gear meshes with the worm; An elastic member, configured to push the driven worm gear to rotate, so that the tooth surfaces of the worm are simultaneously in contact with the tooth surfaces of the driving worm gear and the driven worm gear; A grating seat, installed on the driving worm gear, and a plurality of grating lenses are installed on the grating seat; Wherein, the driven worm gear and the driving worm gear mesh with the worm at different meshing phases.

[0007] In an exemplary embodiment of the present disclosure, the pitch diameter D2 of the driven worm gear is greater than or equal to the pitch diameter D1 of the driving worm gear; The pitch diameter d2 of the worm formed when the driven worm gear meshes with the worm is less than or equal to the pitch diameter d1 of the worm formed when the driving worm gear meshes with the worm.

[0008] In an exemplary embodiment of the present disclosure, the driving worm gear and the driven worm gear are coaxially arranged, and the distance between the driving worm gear and the driven worm gear is 0.1 mm.

[0009] In an exemplary embodiment of the present disclosure, a plurality of arc-shaped holes are formed in the driving worm gear along the circumferential direction, a plurality of first pin shafts corresponding to the arc-shaped holes are arranged on the driven worm gear, the first pin shafts extend into the arc-shaped holes, and the elastic member is installed in the arc-shaped holes; The elastic members are two compression springs, which are respectively located on both sides of the first pin shaft, and one end of each compression spring abuts against the first pin shaft, and the other end abuts against the inner wall of the arc-shaped hole.

[0010] In an exemplary embodiment of the present disclosure, a baffle is sleeved on the main shaft, the baffle is located on the side of the driving worm gear away from the driven worm gear, the baffle is used to close one side of the arc-shaped hole, and the baffle is connected to the driving worm gear through a second pin shaft.

[0011] In an exemplary embodiment of the present disclosure, the driven worm gear is in a cap-shaped or cup-shaped structure, and the worm teeth of the driven worm gear surround the outer peripheral end face of the driving worm gear.

[0012] In an exemplary embodiment of the present disclosure, the elastic member is a leaf spring; A plurality of the leaf springs are arranged along the circumferential direction between the driving worm gear and the driven worm gear, one end of the leaf spring is connected to the driving worm gear, and the other end of the leaf spring is connected to the driven worm gear.

[0013] In an exemplary embodiment of the present disclosure, the pitch diameter D2 of the driven worm gear is greater than or equal to the sum of the pitch diameter D1 of the driving worm gear and the pitch diameter d1 of the worm formed when the driving worm gear meshes with the worm.

[0014] In an exemplary embodiment of the present disclosure, a mounting seat and a transfer plate are sequentially sleeved on the main shaft, the driving worm gear, the mounting seat and the transfer plate are connected through a second pin shaft, and the mounting seat is connected to the main shaft through a screw; The grating seat is sleeved on the main shaft, and the grating seat is connected to the transfer plate through a bolt.

[0015] In an exemplary embodiment of the present disclosure, a bearing seat is provided on the housing. The main shaft passes through the bearing seat and extends into the housing, and is rotatably connected to the grating encoder. The main shaft is rotatably connected to the bearing seat, and the grating encoder is mounted on the bearing seat.

[0016] Advantages of the present disclosure: (1) In the present disclosure, the driving worm gear and the driven worm gear cooperate with the worm at different meshing phases. By pushing the driven worm gear with an elastic member, the tooth surfaces of the worm are always in close contact with the tooth surfaces of the two worm gears, eliminating the backlash of the worm gear mechanism, enabling the grating seat to rotate smoothly, avoiding the deviation of the grating light caused by micrometer-level gaps, and improving the resolution and test accuracy of the spectrometer.

[0017] (2) In the present disclosure, the elastic member enables the tooth surfaces of the worm to always be in close contact with the tooth surfaces of the two worm gears, avoiding the impact sound between the worm and the driving worm gear and the driven worm gear, reducing wear and noise, and increasing the service life of the worm gear mechanism. Description of the Drawings

[0018] The drawings here are incorporated into the description and form a part of this description, showing embodiments consistent with the present disclosure, and are used together with the description to explain the principles of the present disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is an assembly schematic diagram of a zero-clearance worm gear grating tower structure for a spectrometer in an embodiment of the present disclosure; Figure 2 It is a structural schematic diagram of a zero-clearance worm gear grating tower structure for a spectrometer in an embodiment of the present disclosure; Figure 3 It is an exploded view of a zero-clearance worm gear grating tower structure for a spectrometer in an embodiment of the present disclosure; Figure 4 It is a meshing sectional view of a worm with a driving worm gear and a driven worm gear in an embodiment of the present disclosure; Figure 5 It is a meshing schematic diagram of a worm with a driving worm gear and a driven worm gear in an embodiment of the present disclosure; Figure 6 It is a structural schematic diagram of a driving worm gear in an embodiment of the present disclosure; Figure 7 It is a structural schematic diagram of a driven worm gear surrounding a driving worm gear in an embodiment of the present disclosure; Figure 8 For Figure 7Schematic diagram of the meshing of the middle worm with the driving worm wheel and the driven worm wheel.

[0020] Description of the reference numerals in the drawings: 1. Housing; 2. Main shaft; 3. Worm; 4. Driving worm wheel; 5. Driven worm wheel; 6. Elastic member; 7. Grating seat; 8. Arc-shaped hole; 9. First pin shaft; 10. Mounting seat; 11. Adapter plate; 12. Second pin shaft; 13. Bearing seat; 14. Grating encoder; 15. Driving motor; 16. Baffle; 17. Bearing. Detailed implementation manners

[0021] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures, and thus their detailed descriptions will be omitted. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0022] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of the icon to another component, these terms are used in this specification only for convenience, for example, according to the directions of the examples described in the accompanying drawings. It can be understood that if the device of the icon is turned upside down, the component described as "upper" will become the component described as "lower". When a structure is "on" another structure, it may mean that a structure is integrally formed on another structure, or that a structure is "directly" disposed on another structure, or that a structure is "indirectly" disposed on another structure through another structure.

[0023] The terms "a", "an", "the", "said" and "at least one" are used to indicate the existence of one or more elements / components / etc.; the terms "comprising" and "having" are used to mean an open inclusion and mean that there may be additional elements / components / etc. in addition to the listed elements / components / etc.; the terms "first", "second" and "third", etc. are used only as labels and are not a limitation on the quantity of their objects.

[0024] The embodiments of the present disclosure provide a zero-clearance worm wheel grating tower structure for a spectrometer. Refer to Figures 1 to 3, including a housing 1; a main shaft 2 rotatably arranged on the housing 1; a worm 3 rotatably mounted on the housing 1, the worm 3 being located on one side of the main shaft 2 and driven by a driving motor 15; a driving worm gear 4 provided on the main shaft 2, the driving worm gear 4 meshing with the worm 3; a driven worm gear 5 rotatably mounted on the main shaft 2, the driven worm gear 5 meshing with the worm 3; an elastic member 6 configured to push the driven worm gear 5 to rotate so that the tooth surface of the worm 3 is in contact with the tooth surfaces of both the driving worm gear 4 and the driven worm gear 5 simultaneously; a grating seat 7 mounted on the driving worm gear 4, and a plurality of grating lenses are mounted on the grating seat 7; wherein, the driven worm gear 5 and the driving worm gear 4 mesh with the worm 3 at different meshing phases.

[0025] In an embodiment of the present disclosure, the zero-clearance worm gear grating tower structure for the spectrometer is composed of a main shaft 2, a worm 3, a driving worm gear 4, a driven worm gear 5, and an elastic member 6. The main shaft 2 is vertically and rotatably mounted on the housing 1. The worm 3 is located on one side of the main shaft 2 and is rotatably mounted on the housing 1. The output end of the driving motor 15 mounted on the housing 1 is connected to the worm 3 through a coupling to drive the worm 3 to rotate; the driving worm gear 4 is mounted on the main shaft 2, the driven worm gear 5 is rotatably mounted on the main shaft 2, and the driving worm gear 4 and the driven worm gear 5 mesh with the worm 3 at different meshing phases respectively; by driving the motor 15 to drive the worm 3 to rotate, through the worm gear drive between the worm 3 and the driving worm gear 4 and the driven worm gear 5, the driving worm gear 4 and the driven worm gear 5 are driven to rotate, driving the main shaft 2 to rotate. An elastic member 6 is installed between the driving worm gear 4 and the driven worm gear 5. By pushing the driven worm gear 5 through the elastic member 6, the tooth surface of the worm 3 is in contact with the tooth surfaces of the driving worm gear 4 and the driven worm gear 5; the grating seat 7 with a plurality of grating lenses mounted thereon is mounted on the driving worm gear 4 and rotates with the main shaft 2 to achieve smooth rotation of the grating seat 7.

[0026] Compared with the existing worm gear structure, the zero-clearance worm gear grating tower structure for the spectrometer enables the worm tooth surface to always be in close contact with the tooth surfaces of the two worm gears by the cooperation of the driving worm gear and the driven worm gear with different meshing phases with the worm, and by pushing the driven worm gear through the elastic member, eliminating the backlash of the worm gear mechanism, achieving smooth driving of the grating seat to rotate, avoiding the deviation of the grating light caused by the micron-level clearance, and improving the resolution and test accuracy of the spectrometer; by the elastic member, the worm tooth surface is always in close contact with the tooth surfaces of the two worm gears, avoiding the impact sound between the worm and the driving worm gear and the driven worm gear, reducing wear and noise, and improving the service life of the worm gear mechanism.

[0027] In an embodiment of the present disclosure, the main shaft 2 and the worm 3 are not arranged in parallel.

[0028] In one example, the main shaft 2 and the worm 3 are perpendicular to each other.

[0029] In an embodiment of the present disclosure, the pitch diameter D2 of the driven worm gear 5 is greater than or equal to the pitch diameter D1 of the driving worm gear 4; the worm pitch diameter d2 formed when the driven worm gear 5 meshes with the worm 3 is less than or equal to the worm pitch diameter d1 formed when the driving worm gear 4 meshes with the worm 3. In this way, the driven worm gear 5 and the driving worm gear 4 can mesh with the worm 3 at different meshing phases, achieving the elimination of backlash in the worm gear mechanism.

[0030] In an embodiment of the present disclosure, referring to Figure 2 and Figure 3 , the pitch diameter D2 of the driven worm gear 5 is equal to the pitch diameter D1 of the driving worm gear 4. The driving worm gear 4 and the driven worm gear 5 are concentrically arranged, and the center distances between the driving worm gear 4 and the driven worm gear 5 and the worm 3 are the same. In this way, the assembly precision requirements for the driving worm gear 4 and the driven worm gear 5 with respect to the worm 3 can be reduced, and the machining difficulty of the worm gear mechanism can be reduced.

[0031] In an embodiment of the present disclosure, referring to Figure 4 , the driving worm gear 4 and the driven worm gear 5 are coaxially arranged, and the distance between the driving worm gear 4 and the driven worm gear 5 is 0.1 mm. In this way, it is convenient to push the driven worm gear 5 to rotate relative to the driving worm gear 4 through the elastic member 6, so that the tooth surface of the worm 3 is always in close contact with the tooth surfaces of the driving worm gear 4 and the driven worm gear 5.

[0032] In an embodiment of the present disclosure, the driving worm gear 4 and the driven worm gear 5 can be first machined into an integral worm gear, and then cut along the thickness direction into the driving worm gear 4 and the driven worm gear 5. The thickness of the driven worm gear 5 is 1 / 2 to 1 / 3 of the overall thickness.

[0033] In an embodiment of the present disclosure, the elastic member 6 is one of a compression spring, a leaf spring, or a torsion spring.

[0034] In one example, the elastic member 6 is a compression spring.

[0035] In an embodiment of the present disclosure, referring to Figure 3 and Figure 6 , a plurality of arc-shaped holes 8 are formed in the driving worm gear 4 and are circumferentially distributed. A plurality of first pin shafts 9 corresponding to the arc-shaped holes 8 are provided on the driven worm gear 5. The first pin shafts 9 extend into the arc-shaped holes 8, and the elastic member 6 is installed in the arc-shaped holes 8; the elastic member 6 is two compression springs, which are respectively located on both sides of the first pin shaft 9, and one end of each compression spring abuts against the first pin shaft 9, and the other end abuts against the inner wall of the arc-shaped hole 8. In this way, it is possible to push the driven worm gear 5 to rotate relative to the driving worm gear 4 through the elastic member 6, so that the worm 3 is elastically held between the driving worm gear 4 and the driven worm gear 5, and the tooth surface of the worm 3 is always in close contact with the tooth surfaces of the driving worm gear 4 and the driven worm gear 5.

[0036] Optionally, the arc-shaped hole 8 is bent towards the direction of the main shaft 2.

[0037] In one example, the number of arc-shaped holes 8 is four.

[0038] Optionally, the driven worm gear 5 is in interference fit with the first pin shaft 9.

[0039] Optionally, the driven worm gear 5 and the first pin shaft 9 are integrally machined.

[0040] In one example, the first pin shaft 9 is located at the middle position of the arc-shaped hole 8. Compression springs are respectively arranged on both sides of the first pin shaft 9. One end of each compression spring is connected to the inner wall of the arc-shaped hole 8, and the other end of each compression spring is connected to the first pin shaft 9.

[0041] In one embodiment of the present disclosure, refer to Figure 2 and Figure 3 , a baffle 16 is sleeved on the main shaft 2. The baffle 16 is located on the side of the driving worm gear 4 away from the driven worm gear 5. The baffle 16 is used to close one side of the arc-shaped hole 8. The baffle 16 and the driving worm gear 4 are connected by a second pin shaft 12. In this way, it can be realized to prevent the elastic component 6 in the arc-shaped hole 8 from falling out.

[0042] It can be understood that the baffle 16 is used to close the side of the arc-shaped hole 8 away from the driven worm gear 5.

[0043] In another embodiment of the present disclosure, refer to Figure 7 and Figure 8 , the driven worm gear 5 is in a cap-shaped or cup-shaped structure. The worm teeth of the driven worm gear 5 surround the outer peripheral end face of the driving worm gear 4. In this way, it can be realized to meet the space limitations and performance requirements of different spectrometer models and improve the application range of the grating tower structure.

[0044] Optionally, there is a gap between the driving worm gear 4 and the driven worm gear 5. In this way, it can be realized to avoid interference between the driving worm gear 4 and the driven worm gear 5.

[0045] In one example, the gap between the driving worm gear 4 and the driven worm gear 5 is 0.1 mm.

[0046] In one embodiment of the present disclosure, refer to Figure 7 , the elastic component 6 is a leaf spring; a plurality of leaf springs are arranged circumferentially between the driving worm gear 4 and the driven worm gear 5. One end of each leaf spring is connected to the driving worm gear 4, and the other end of each leaf spring is connected to the driven worm gear 5. In this way, it can be realized to push the driven worm gear 5 to move, so that the worm 3 is elastically held between the driving worm gear 4 and the driven worm gear 5.

[0047] It can be understood that one end of the leaf spring is connected to the outer wall of the hub circumference of the driving worm gear 4, and the other end of the leaf spring is connected to the inner wall of the driven worm gear 5.

[0048] In an embodiment of the present disclosure, the meshing relationship between the worm 3 and the driving worm wheel 4 and the driven worm wheel 5 satisfies the following relational expression: r = (D1 + d1 - D2) / 2; Wherein, r is the distance between the center of the worm 3 and the pitch circle of the driven worm wheel 5; D1 is the pitch diameter of the driving worm wheel 4; D2 is the pitch diameter of the driven worm wheel 5; d1 is the worm pitch diameter formed when the driving worm wheel 4 meshes with the worm 3. In this way, the worm 3 can mesh with the driving worm wheel 4 and the driven worm wheel 5 at different meshing phases.

[0049] In the above embodiment, referring to Figure 8 , the spiral teeth of the driven worm wheel 5 surround the outer peripheral end face of the driving worm wheel 4, the worm 3 meshes with the driving worm wheel 4 and the driven worm wheel 5 respectively, the driving worm wheel 4 and the worm 3 mesh with each other at point c, and the driven worm wheel 5 meshes with the worm 3 at point d under the elastic force of the leaf spring.

[0050] It can be understood that theoretically r can be any value, that is, r can be 0, or it can be positive or negative; when the value of r is larger, the distance between the spiral teeth of the driven worm wheel 5 and the outer peripheral end face of the driving worm wheel 4 is smaller.

[0051] In an embodiment of the present disclosure, the pitch diameter D2 of the driven worm wheel 5 is greater than or equal to the sum of the pitch diameter D1 of the driving worm wheel 4 and the worm pitch diameter d1 formed when the driving worm wheel 4 meshes with the worm 3. In this way, the teeth of the driven worm wheel 5 can surround the outer peripheral end face of the driving worm wheel 4, avoiding interference between the driving worm wheel 4 and the driven worm wheel 5, and enabling the driving worm wheel 4 and the driven worm wheel 5 to mesh with the worm 3 at different meshing phases.

[0052] In an embodiment of the present disclosure, the tooth width of the driving worm wheel 4 is the same as the outer diameter of the worm 3. In this way, the contact area between the driving worm wheel 4 and the worm 3 can be increased, and the service life of the worm wheel mechanism can be improved.

[0053] In an embodiment of the present disclosure, the worm pitch diameter d1 formed when the driving worm wheel 4 meshes with the worm 3 is greater than the worm pitch diameter d2 formed when the driven worm wheel 5 meshes with the worm 3. In this way, the frictional loss of the worm 3 can be reduced.

[0054] It can be understood that the tooth pitch of the worm 3 is constant. By increasing the lead angle of the worm 3, the frictional loss between the worm 3 and the driven worm wheel 5 can be reduced, enabling the worm 3 to drive the driven worm wheel 5 to rotate with less force and improving the driving efficiency.

[0055] In an embodiment of the present disclosure, referring to Figures 1 to 3, a mounting base 10 and an adapter plate 11 are sequentially sleeved on the main shaft 2. The driving worm gear 4, the mounting base 10 and the adapter plate 11 are connected by a second pin shaft 12, and the mounting base 10 and the main shaft 2 are connected by screws; the grating base 7 is sleeved on the main shaft 2, and the grating base 7 and the adapter plate 11 are connected by bolts, and a plurality of grating lenses are mounted on the grating base 7. In this way, the rotation of multiple grating lenses can be realized.

[0056] In an embodiment of the present disclosure, referring to Figures 1 to 3 , a bearing seat 13 is provided on the housing 1. The main shaft 2 passes through the bearing seat 13 and extends into the housing 1, and is rotatably connected to the grating encoder 14. The main shaft 2 is rotatably connected to the bearing seat 13, and the grating encoder 14 is mounted on the bearing seat 13. In this way, the rotation position of multiple grating lenses can be accurately controlled.

[0057] Optionally, the main shaft 2 is rotatably connected to the bearing seat 13 through a bearing 17.

[0058] Optionally, the bearing 17 is an angular contact ball bearing or a deep groove ball bearing.

[0059] It can be understood that the driving worm gear 4, the grating base 7, the mounting base 10, the adapter plate 11, and the baffle 16 are connected into a whole through bolts and pin shafts. This whole is connected to the main shaft 2 by screws and is mounted on the housing 1 through the bearing seat 13 to eliminate the axial clearance.

[0060] In an embodiment of the present disclosure, a T-shaped groove extending axially is provided on the circumferential outer wall of the main shaft 2. The mounting base 10 is clamped on the main shaft 2 through the T-shaped groove, and the screw is connected to the main shaft 2 through the T-shaped groove. In this way, the relative rotation between the mounting base 10 and the main shaft 2 can be restricted, and the installation accuracy can be improved.

[0061] In an embodiment of the present disclosure, snap rings are respectively provided below the driven worm gear 5 and the bearing seat 13. The snap rings are clamped on the main shaft 2, and the two snap rings are respectively used to limit the driven worm gear 5 and the bearing to prevent the driven worm gear 5 or the bearing from separating from the main shaft 2.

[0062] In an embodiment of the present disclosure, the worm 3 is made of carbon steel or 25Cr2MoVA, and the driving worm gear 4 and the driven worm gear 5 are made of aluminum bronze or resin material. In this way, smooth meshing between the worm 3 and the driving worm gear 4 and the driven worm gear 5 can be realized, and the transmission noise can be reduced.

[0063] Optionally, the driving worm gear 4 and the driven worm gear 5 are made of nylon resin or POM material.

[0064] In an embodiment of the present disclosure, referring to Figures 1 to 8 , the working process of the zero-clearance worm gear grating tower structure for this spectrometer is briefly described as follows: When the present disclosure is in use, first assemble the grating tower structure, install the assembled grating tower structure on the housing 1, the driving motor 15 drives the worm 3 to rotate through the coupling, and through the meshing transmission between the worm 3 and the driving worm wheel 4 and the driven worm wheel 5, drive the driving worm wheel 4 and the driven worm wheel 5 to rotate, drive the main shaft 2 to rotate, and drive the grating lens to rotate; the driving worm wheel 4 and the driven worm wheel 5 mesh with the worm 3 at different meshing phases, and the elastic member 6 pushes the driven worm wheel 5 to rotate through the pre-tightening force, so that the tooth surface of the worm 3 is always in close contact with the tooth surfaces of the driving worm wheel 4 and the driven worm wheel 5, eliminating the backlash of the worm and worm wheel mechanism, making the rotation of the grating seat 7 smoother, and improving the resolution and test accuracy of the spectrometer.

[0065] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include known common knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

Claims

1. A zero-gap worm gear grating tower structure for a spectrometer, comprising a housing (1), characterized in that, It further includes: A main shaft (2), rotatably arranged on the housing (1); A worm (3), rotatably mounted on the housing (1), the worm (3) is located on one side of the main shaft (2), and the worm (3) is driven by a driving motor (15); A driving worm gear (4), arranged on the main shaft (2), and the driving worm gear (4) meshes with the worm (3); A driven worm gear (5), rotatably mounted on the main shaft (2), and the driven worm gear (5) meshes with the worm (3); An elastic member (6), configured to push the driven worm gear (5) to rotate, so that the tooth surface of the worm (3) is in contact with the tooth surfaces of the driving worm gear (4) and the driven worm gear (5) simultaneously; A grating seat (7), mounted on the driving worm gear (4), and a plurality of grating lenses are mounted on the grating seat (7); Wherein, the driven worm gear (5) and the driving worm gear (4) mesh with the worm (3) with different meshing phases.

2. The zero-gap worm gear grating tower structure for a spectrometer according to claim 1, wherein The pitch diameter D2 of the driven worm gear (5) is greater than or equal to the pitch diameter D1 of the driving worm gear (4); The worm pitch diameter d2 formed when the driven worm gear (5) meshes with the worm (3) is less than or equal to the worm pitch diameter d1 formed when the driving worm gear (4) meshes with the worm (3).

3. The zero-gap worm gear grating tower structure for a spectrometer according to claim 1, characterized in that, The driving worm gear (4) and the driven worm gear (5) are coaxially arranged, and the distance between the driving worm gear (4) and the driven worm gear (5) is 0.1 mm.

4. The zero-gap worm gear grating tower structure for a spectrometer according to claim 1, characterized in that, A plurality of arc-shaped holes (8) are formed in the driving worm gear (4) and distributed circumferentially, a plurality of first pin shafts (9) corresponding to the arc-shaped holes (8) are arranged on the driven worm gear (5), the first pin shafts (9) extend into the arc-shaped holes (8), and the elastic member (6) is mounted in the arc-shaped holes (8); The elastic member (6) is two compression springs, respectively located on both sides of the first pin shaft (9), and one end of each compression spring abuts against the first pin shaft (9), and the other end abuts against the inner wall of the arc-shaped hole (8).

5. The zero-gap worm gear grating tower structure for a spectrometer according to claim 4, wherein, A baffle (16) is sleeved on the main shaft (2), the baffle (16) is located on the side of the driving worm gear (4) away from the driven worm gear (5), the baffle (16) is used to close one side of the arc-shaped hole (8), and the baffle (16) is connected to the driving worm gear (4) through a second pin shaft (12).

6. The zero-gap worm gear grating tower structure for a spectrometer according to claim 1, characterized in that, The driven worm gear (5) is in a cap-shaped or cup-shaped structure, and the worm teeth of the driven worm gear (5) surround the outer peripheral end surface of the driving worm gear (4).

7. The zero-gap worm gear grating tower structure for a spectrometer according to claim 6, characterized in that, The elastic member (6) is a leaf spring; A plurality of the leaf springs are arranged circumferentially between the driving worm gear (4) and the driven worm gear (5), one end of the leaf spring is connected to the driving worm gear (4), and the other end of the leaf spring is connected to the driven worm gear (5).

8. The zero-gap worm gear grating tower structure for a spectrometer according to claim 6, characterized in that, The pitch diameter D2 of the driven worm gear (5) is greater than or equal to the sum of the pitch diameter D1 of the driving worm gear (4) and the worm pitch diameter d1 formed when the driving worm gear (4) meshes with the worm (3).

9. The zero-gap worm gear grating tower structure for a spectrometer according to claim 1, wherein An installation base (10) and an adapter plate (11) are successively sleeved on the main shaft (2). The driving worm gear (4), the installation base (10) and the adapter plate (11) are connected by a second pin shaft (12), and the installation base (10) is connected to the main shaft (2) by screws; The grating base (7) is sleeved on the main shaft (2), and the grating base (7) is connected to the adapter plate (11) by bolts.

10. The zero-gap worm gear grating tower structure for a spectrometer according to claim 1, characterized in that, A bearing seat (13) is arranged on the housing (1). The main shaft (2) passes through the bearing seat (13) and extends into the housing (1), and is rotatably connected to a grating encoder (14). The main shaft (2) is rotatably connected to the bearing seat (13), and the grating encoder (14) is installed on the bearing seat (13).

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