Rapid and stable sample support conveying mechanism

Abstract

The utility model discloses a rapid and stable sample support conveying mechanism, and belongs to the field of experimental instruments. The device at least comprises a sample bracket, a rack, a guide rail, a sliding block, a fixed flat plate, wheels, a front cover frame, a hinge, a turning plate, a gear and a motor, a guide rail and a sliding block are arranged on the fixed flat plate; the slide block is fixedly connected with the sample bracket; a rack is arranged on the sample bracket; a gear is arranged on a rotating shaft of the motor; the gear corresponds to the rack; a front cover frame is arranged at the front end opening of the instrument bin; a turning plate is arranged at the front cover frame; a turning plate adapter plate is arranged on the turning plate; a wheel supporting arm is arranged on the turning plate adapter plate; a wheel is arranged at the front end of the wheel supporting arm. The structure mode that a gear-rack and a guide rail-sliding block are matched is adopted, the stable sample feeding and sample injection function of the instrument is achieved, after the turning plate is opened, the wheels have the supporting and bearing effects on the sample support, the device is particularly suitable for automatic sample feeding and discharging conveying of long-stroke and large-batch sample measurement, and carrying and conveying of the ultra-long stroke can be achieved.

Description

Technical Field

[0001] The utility model belongs to the field of experimental instruments, and in particular relates to a sample support conveying mechanism for carrying and transporting samples. Background Art

[0002] The sample holder assembly is widely used in laboratory instruments and is an important component of the instrument, serving as a carrier and transport for samples.

[0003] The sample holder components on the experimental instruments currently on the market usually focus on the "carrying" function of the sample.

[0004] When the sample needs to be moved in or out of the experimental instrument (also known as the sample in and out process, or simply in and out), the traditional slide rail structure is mostly used, relying on manual operation to manually pull the sample holder in and out of the experimental instrument (the cavity or sample compartment), which is relatively laborious and results in a waste of labor costs. There are also some that use automatic intelligent modes, but most of them have defects in structure, and there are often jams in the sample in and out process, which is not smooth and causes troubles to users.

[0005] How to realize the function of smooth sample delivery and injection of the instrument, especially the automated sample delivery for long-stroke and large-volume sample measurement, is a technical problem that needs to be solved in practical work. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a fast and stable sample rack conveying mechanism. It adopts a gear-rack and guide rail-slider matching structure mode, the sample conveying is more stable and the positioning is more accurate; the length of the rack and the guide rail is splicable, and the roller supports and carries the sample rack after the flap is opened, so that the instrument can smoothly deliver samples, which is particularly suitable for the automatic in and out conveying of long-stroke and large-volume sample measurement, and can realize ultra-long-stroke carrying and conveying.

[0007] The technical solution of the utility model is to provide a fast and stable sample rack conveying mechanism, which is characterized by:

[0008] The sample support conveying mechanism is composed of at least the following parts:

[0009] Sample holder, rack, guide rail, slider, fixed plate, wheel, front cover frame, hinge, flap, gear and motor;

[0010] A guide rail is arranged on the fixed plate, and a slider is arranged on the guide rail; the slider is fixedly connected to the sample holder;

[0011] A rack is arranged below the sample holder for carrying the sample; a motor is arranged on one side of the rack, and a gear is arranged on the output shaft of the motor; the gear is arranged corresponding to the rack below the sample holder;

[0012] A front cover frame is arranged at the front opening of the instrument cavity; a flap is arranged at the front cover frame; the flap and the front cover frame are hingedly connected; a wheel support arm is arranged on the flap; and a wheel is rotatably arranged at the front end of the wheel support arm.

[0013] Specifically, the motor is a stepper motor.

[0014] Furthermore, the sliding block is fixedly connected to the sample holder via a bottom plate adapter plate disposed below the sample holder.

[0015] Specifically, the setting position of the gear corresponds to the setting position of the rack; the tooth pitch of the gear matches the tooth pitch of the rack.

[0016] Furthermore, the rack is a single-sided rack; the rack is fixed on the sample holder; the toothed surface of the rack faces the gear located on the motor shaft.

[0017] Specifically, a flap adapter plate is arranged on the flap, and a wheel support arm is arranged on the base of the flap adapter plate, and the wheel is rotatably arranged at the front end of the wheel support arm.

[0018] Specifically, a hinge is provided between the front cover frame and the flap to form a hinged connection structure between the front cover frame and the flap.

[0019] Furthermore, the hinge is fixed to the first hinge fixing hole of the front cover frame and the second hinge fixing hole of the flap through the hinge fixing holes on its two hinge pieces. The flap rotates with the hinge shaft of the hinge as the rotation axis to achieve opening and closing of the flap.

[0020] Specifically, the front cover frame constructs a frame structure for fixing the flap and related accessories at the front end opening of the instrument cavity.

[0021] Furthermore, when the sample holder is output, the outer edge of the wheel is in the same horizontal plane as the lower end surface of the sample holder; when the sample holder is returned to its original position, the hinge is closed, the wheel is raised, and the outer edge of the wheel and the end surface of the sample holder are in contact with each other to help push the sample holder back to its original position.

[0022] Compared with the prior art, the advantages of the utility model are:

[0023] 1. The technical solution of the utility model adopts the structural mode of gear-rack and guide rail-slider, which makes the sample transportation more stable and the positioning more accurate;

[0024] 2. The technical solution of the utility model has a relatively simple structure, and the module is more automated, intelligent and fast;

[0025] 3. The technical solution of the utility model is adopted. Since the rack and the guide rail are splicable, and the roller supports and carries the sample holder after the flap is opened, the instrument can smoothly deliver samples. This design is particularly suitable for automated sample delivery and transport for long-stroke and large-volume sample measurement, and can realize ultra-long-stroke transport. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1a It is a schematic diagram of the overall structure of the utility model;

[0027] Figure 1b is a schematic diagram of the reciprocating motion of the sample holder;

[0028] Figure 1c It is a schematic diagram of the sample holder when it is extended;

[0029] Figure 2a It is a schematic diagram of the structure of the sample holder of the utility model;

[0030] Figure 2b is a schematic diagram of the cross-sectional structure of the sample holder;

[0031] Figure 3 It is a schematic diagram of the top view of the rack of the utility model;

[0032] Figure 4 It is a schematic diagram of the top view of the guide rail of the utility model;

[0033] Figure 5a It is a structural schematic diagram of the slider of the utility model;

[0034] Figure 5b yes Figure 5a A-direction view;

[0035] Figure 6 It is a structural schematic diagram of the bottom plate adapter plate of the utility model;

[0036] Figure 7 It is a structural schematic diagram of the fixed plate of the utility model;

[0037] Figure 8 It is a structural schematic diagram of the wheel of the utility model;

[0038] Fig. 9 It is a structural schematic diagram of the flap adapter plate of the utility model;

[0039] Fig.10 It is a structural schematic diagram of the front cover frame of the utility model;

[0040] Fig.11 It is a schematic diagram of the back structure of the flap of the utility model;

[0041] Fig.12a It is a structural schematic diagram of the hinge of the utility model;

[0042] Figure 12b yes Fig.12a Schematic diagram of the structure viewed from direction A.

[0043] In the figure, 1 is the sample holder, 1-1 is the rack mounting hole, 1-2 is the base plate adapter plate mounting hole, 1-3 is the sample tray mating surface, 2 is the rack, 3 is the guide rail, 3-1 is the guide rail mounting hole, 4 is the slider, 4-1 is the slide groove, 5 is the base plate adapter plate, 5-1 is the slider fixing hole, 5-2 is the adapter plate fixing hole, 6 is the fixing plate, 6-1 is the rack fixing screw hole, 6-2 is the guide rail positioning groove, and 6-3 is the motor Fixing hole, 7 is a wheel, 7-1 is a bearing, 8 is a front cover frame, 8-1 is a first hinge fixing hole, 9 is a hinge, 9-1 is a hinge plate, 9-2 is a hinge fixing hole, 10 is a flap adapter plate, 10-1 is a base, 10-2 is a flap adapter plate fixing hole, 10-3 is a wheel support arm, 10-4 is a wheel fixing hole, 11 is a flap, 11-1 is a second hinge fixing hole, 12 is a gear, and 13 is a motor. DETAILED DESCRIPTION

[0044] The utility model is further described below in conjunction with the accompanying drawings.

[0045] Figure 1a to Figure 1c In the present technical solution, the sample holder conveying mechanism is mainly composed of the following parts: a sample holder 1, a rack 2, a guide rail 3, a slider 4, a bottom plate adapter plate 5, a fixed plate 6, wheels 7, a front cover frame 8, a hinge 9, a flap adapter plate 10, a flap 11, a gear 12 and a stepper motor 13.

[0046] in, Figure 1a and Figure 1c is the structure of the sample holder transport mechanism viewed from one side (e.g., from the left side), Figure 1b The structure of the sample holder transport mechanism is viewed from another side (eg, from the right side).

[0047] Specifically, a rack 2 and a bottom plate adapter plate 5 are provided below the sample holder 1 for carrying the sample.

[0048] A guide rail 3 is arranged on a fixed plate 6 (of the instrument cavity), and a slider 4 is arranged on the guide rail.

[0049] The sliding block is fixedly connected to the bottom plate adapter plate below the sample holder.

[0050] A stepper motor 13 is provided, and a gear 12 is provided on the output shaft of the stepper motor. The tooth pitch of the gear matches the tooth pitch of the rack, and the setting position of the gear corresponds to the setting position of the rack.

[0051] The motor is a stepping motor.

[0052] The rotation of the motor output shaft is converted into horizontal bidirectional movement of the sample holder (through the slider) along the guide rail through the conversion of the gear-rack kinematic pair (also known as active connection), thereby realizing the smooth sample delivery and injection functions, which is specifically reflected in the "extending" and "retracting" actions of the sample holder.

[0053] exist Figure 1a When the sample holder moves to the right along the guide rail under the drive of the motor, it meets the wheel 7 set on the front cover frame 8 and continues to move forward (in Figure 1a and Figure 1c In is to move to the right, in Figure 1b By applying thrust to the wheel, the flap 11 is driven to open through the flap adapter plate 10 (refer to Figure 1c The sample holder continues to extend out of the front cover frame of the instrument, thereby realizing the sample delivery function of the sample carried on the sample holder.

[0054] In this process, see Figure 1c As shown in the figure, when the flip plate is opened, the wheel support arm on the flip plate adapter plate and the wheels (also called rollers) provided thereon also play a supporting and bearing role for the extended sample holder, which helps the sample holder to slide stably on the rollers, and also improves and increases the smoothness and stability of the sample holder during movement.

[0055] When the sample holder is extended to the outermost position, the sample can be placed on the sample holder, or the sample can be removed from the sample holder.

[0056] When the sample is placed on the extended sample holder, the motor is controlled to rotate in the opposite direction to drive the sample holder to retract. During the retraction process, the hinges are closed and the wheels are raised and retracted to assist in pushing the holder back to its original position easily, thereby realizing the sampling and conveying function of the sample carried on the sample holder.

[0057] Further, such as Figure 1a , Figure 1b As shown in FIG. 1 , the slider 4 and the bottom plate adapter plate 5 are fixed on the sample holder 1 , and the slider cooperates with the guide rail, so that the sample holder can slide freely on the guide rail.

[0058] The rack 2 is fixed on the sample holder 1 and cooperates with the gear 12. The gear 12 cooperates with the output shaft of the stepper motor 13. The stepper motor drives the gear to rotate. Through the gear-rack meshing movement, the sample holder is driven to make a reciprocating motion under the guidance and restriction of the guide rail 3, thereby realizing the function of the sample holder module to quickly and accurately transport samples.

[0059] This technical solution adopts the structural mode of gear-rack and guide rail-slider cooperation to realize the function of fast and accurate sample transportation of the sample holder module. This structure can freely select the length of the rack and guide rail assembly according to the needs of the user, and is also suitable for long-distance transportation needs.

[0060] exist Figure 2a and Figure 2b In the figure, a schematic diagram of the structure and a schematic diagram of the cross-sectional structure of the sample holder 1 are given.

[0061] The upper end surface of the sample holder is the matching surface 1-3 of the sample tray.

[0062] The sample holder is provided with a rack mounting hole 1-1 and a base plate adapter plate mounting hole 1-2.

[0063] A rack 2 is fixed on the lower end surface of the sample holder through screws and preset rack mounting holes.

[0064] The rack is arranged along the length direction of the sample holder (ie, the moving direction of the sample holder).

[0065] At the lower end surface of the sample holder, the bottom plate adapter plate 5 is fixed to the sample holder through screws and the bottom plate adapter plate mounting holes 1 - 2 .

[0066] The slider 4 is fixed on the bottom plate adapter plate, and the slider and the guide rail 3 are matched.

[0067] Since sample holders are often used in acidic and alkaline environments, there are certain requirements for materials and coatings. The materials should be light, usually aluminum alloys. Because of their load-bearing function and transportation purposes, the strength and flatness must also meet the requirements of use.

[0068] Figure 3 A schematic diagram of the top view of the rack structure is given.

[0069] As can be seen from the figure, the rack 2 is a single-sided rack.

[0070] The rack is fixed on the sample support; the toothed surface of the rack faces the gear on the motor shaft.

[0071] The toothed surface of the rack is arranged laterally relative to the sample holder.

[0072] The rack 2, the gear 12 and the motor 13 can be selected as standard parts without special requirements.

[0073] The gear has an interference fit with the motor shaft of the motor.

[0074] Figure 4 A schematic diagram of the top view structure of the guide rail is given.

[0075] On the guide rail 3, a guide rail mounting hole 3-1 is provided for fixing the guide rail on the fixing plate 6 by screws (see Figure 1c The length of the guide rail can be customized as required.

[0076] Figure 5a It is a structural schematic diagram of the slider of the utility model; Figure 5b yes Figure 5a A-direction view.

[0077] As can be seen from the figure, a slide groove 4-1 is provided through the middle of the slider; the cross-sectional shape of the slide groove matches the cross-sectional shape of the guide rail.

[0078] Guide rails and sliders are generally selected as standard parts to reduce procurement and manufacturing costs.

[0079] The guide rails and sliders are selected according to the use environment. Since this mechanism is generally used in acid and alkali environments, the material can be stainless steel 316L or anti-rust and anti-corrosion surface treatment to ensure that the parts can run smoothly for a long time.

[0080] Figure 6 In the figure, a schematic diagram of the structure of the base plate adapter plate is given.

[0081] The bottom plate adapter plate 5 is provided with a slider fixing hole 5 - 1 , and the slider is fixed to the bottom plate adapter plate by screws.

[0082] The bottom plate adapter plate 5 is provided with an adapter plate fixing hole 5-2, and the bottom plate adapter plate is fixed to the bottom plate adapter plate mounting hole 1-2 under the sample holder by screws (combined with Figure 2a ).

[0083] Figure 7 In the figure, a schematic diagram of the structure of the fixed plate is given.

[0084] The fixing plate 6 is provided with guide rail fixing screw holes 6 - 1 for fixing the guide rail, and the guide rail is fixed to the fixing plate through the screw holes.

[0085] A guide rail positioning groove 6-2 is provided on the fixed plate, and the fixing groove is used to ensure the constraint (or limit) of the installation position of the guide rail.

[0086] The motor 13 is fixed to the fixing plate 6 with screws; the motor fixing hole 6-3 is designed to be elliptical to fine-tune the installation position of the motor and further adjust the degree of engagement between the gear 2 and the rack 12.

[0087] The fixed plate 6 plays the role of supporting key components and is used in automated equipment for measuring large quantities of samples. It is generally required to be light to reduce the weight of the entire equipment. The material is generally selected from 6061-T6 aluminum plate.

[0088] Figure 8 In the figure, the wheel 7 (also called roller) has its own bearing, which is a standard part. There is a countersunk screw matching the wheel. The wheel bearing is interference fit with the countersunk screw. The fitting point between the screw and the wheel bearing is a smooth axis, which passes through the wheel and the flap adapter plate 10 and is fixed with a nut.

[0089] In the present technical solution, the setting of the roller is, on the one hand, to open the flap during the movement of the sample holder; on the other hand, when the flap is opened, the wheel support arm on the flap adapter plate fixed to the flap and the roller arranged thereon also play a supporting and bearing role for the extended sample holder, which helps the sample holder to slide stably on the roller, and also improves and increases the stability and stability of the sample holder during movement.

[0090] Fig. 9 In the figure, the flap adapter plate 10 is a sheet metal part, the plate-shaped base 10-1 is fixed on the flap 11 through the flap adapter plate fixing hole 10-2, and a wheel support arm 10-3 is provided on the plate-shaped base of the flap adapter plate, and the wheel 7 is rotatably fixed at the wheel fixing hole 10-4 at the front end of the wheel support arm.

[0091] The wheel support arm and the base are arranged at a certain angle, and the specific angle is preferably the angle with the least effort for the sample holder to push open the flap.

[0092] The material of the flap adapter plate needs to consider corrosion resistance, and 316L stainless steel is generally used.

[0093] Fig.10 In the figure, the front cover frame 8 is an ABS plastic part that matches the mechanical structure at the front opening of the instrument cavity, mainly for constructing a frame structure for fixing the flap and related accessories at the front opening of the instrument cavity.

[0094] A first hinge fixing hole 8-1 is provided at the middle and lower part of the front cover frame for fixing a hinge piece of the hinge.

[0095] Fig.11 In the embodiment, the flap is a plate-like component that matches the shape and size of the front cover frame. A second hinge fixing hole 11-1 is provided on the reverse side of the flap for fixing the other hinge piece of the hinge.

[0096] The flap is generally made of ABS plastic with a powder-coated surface.

[0097] Fig.12a It is a schematic diagram of the structure of the hinge.

[0098] A hinge is a mechanical device used to connect two solid bodies (the front cover frame 8 and the flap 11 in this technical solution) and allow the two to rotate relative to each other.

[0099] Figure 12b yes Fig.12a A-direction view.

[0100] Corresponding hinge fixing holes 9-2 are arranged on the two hinge pieces 9-1 of the hinge.

[0101] The hinges use conventional hinged hinges, there are no special requirements, and standard parts can be used.

[0102] The hinge 9 is fixed to the first hinge fixing hole 8-1 of the front cover frame and the second hinge fixing hole 11-1 of the flap through the hinge fixing holes 9-2 on its two hinge pieces 9-1, so that the flap can rotate with the hinge axis as the rotation axis, thereby realizing the opening and closing function of the flap (corresponding to the opening and closing actions of the instrument compartment door).

[0103] In order to more conveniently realize the automatic closing function of the flap, a shaft spring may be provided, and the automatic closing function of the flap is realized by means of the elastic force of the shaft spring on the flap.

[0104] In summary, in this technical solution, the flap adapter plate 4 is fixed on the flap 11, the wheel 7 is fixed on the flap adapter plate 10, one hinge piece of the hinge 9 is fixed on the flap 11, and the other hinge piece is fixed on the front cover frame 8. The sample holder module moves to the right (such as Figure 1c ), touches the wheel 7, the sample rack flap adapter plate 10 pushes the flap 11, the flap opens, the wheels and the flap adapter plate play a supporting role for the sample rack, and the sample rack is smoothly sent out.

[0105] When the sample holder is retracted, the motor 13 drives the gear 12 and the rack 2 to move, and the sample holder 1 slides on the guide rail into the chamber. When entering the chamber, the hinge 9 is closed, the flap 11 is closed, and the sample is quickly and smoothly delivered.

[0106] In this technical solution, since the length of the guide rail and the rack can be set as needed, the movable range of the sample holder can also be changed as needed. This design is particularly suitable for automated sample in and out transportation for long-stroke and large-volume sample measurement, and can realize ultra-long-stroke transportation.

[0107] In this technical solution, a gear-rack and guide rail-slider structure is adopted. The sample holder runs stably during sample transportation. A stepper motor is used to control the movement of the sample holder. The gear-rack structure also makes the positioning precise.

[0108] In the technical solution, hinges and rollers are fixed at the sample holder in and out of the instrument compartment door through the mutual cooperation among the motor, gear-rack and slider-guide rail, sample holder, hinge and roller and other parts. The motor drives the gear-rack and slider guide rail to move with fast speed and accurate positioning. An ultra-long stroke can be obtained by splicing the rack and guide rail. The sample holder output hits the roller, and the roller cooperates with the holder and hinge. The hinge opens, and the sample holder slides stably on the roller to achieve easy sample delivery. During sample injection, the sample holder also slides stably on the roller until the sample holder is about to be injected. The hinge begins to close, the roller rises, and the sample holder is easily pushed into the compartment door. The whole process realizes the function of stable sample delivery and injection of the instrument in a short time. This design is particularly suitable for automated sample in and out transportation for long-stroke and large-volume sample measurement.

[0109] The utility model can be widely used in the field of designing and manufacturing sample support conveying mechanism components of experimental instruments.

Claims

1. A fast and stable sample rack conveying mechanism, characterized by: The sample support conveying mechanism is composed of at least the following parts: Sample holder, rack, guide rail, slider, fixed plate, wheel, front cover frame, hinge, flap, gear and motor; A guide rail is arranged on the fixed plate, and a slider is arranged on the guide rail; The sliding block is fixedly connected to the sample support; A rack is arranged below a sample holder for carrying the sample; A motor is arranged on one side of the rack, and a gear is arranged on the output shaft of the motor; The gear is arranged corresponding to the rack under the sample holder; A front cover frame is provided at the front opening of the instrument cavity; A flap is provided at the front cover frame; The flap is hingedly connected to the front cover frame; A wheel support arm is arranged on the flap; A wheel is rotatably arranged at the front end of the wheel supporting arm.

2. The fast and stable sample rack transport mechanism according to claim 1, characterized in that The motor is a stepper motor.

3. The fast and stable sample holder transport mechanism according to claim 1, characterized in that The sliding block is fixedly connected to the sample support via a bottom plate adapter plate arranged below the sample support.

4. The fast and stable sample holder transport mechanism according to claim 1, characterized in that The setting position of the gear corresponds to the setting position of the rack; the tooth pitch of the gear matches the tooth pitch of the rack.

5. The fast and stable sample rack transport mechanism according to claim 1, characterized in that The rack is a single-sided rack; the rack is fixed on the sample holder; the toothed surface of the rack faces the gear on the motor shaft.

6. The fast and stable sample rack transport mechanism according to claim 1, characterized in that A flap adapter plate is arranged on the flap, and a wheel support arm is arranged on the base of the flap adapter plate. The wheel is rotatably arranged at the front end of the wheel support arm.

7. The fast and stable sample rack transport mechanism according to claim 1, characterized in that A hinge is arranged between the front cover frame and the flip plate to form a hinged connection structure between the front cover frame and the flip plate.

8. The fast and stable sample rack transport mechanism according to claim 1, characterized in that The hinge is fixed to the first hinge fixing hole of the front cover frame and the second hinge fixing hole of the flap through the hinge fixing holes on its two hinge pieces. The flap rotates with the hinge shaft of the hinge as the rotation axis to realize the opening and closing of the flap.

9. The fast and stable sample rack transport mechanism according to claim 1, characterized in that The front cover frame forms a frame structure for fixing the flap and related accessories at the front end opening of the instrument cavity.

10. The fast and stable sample rack transport mechanism according to claim 1, characterized in that When the sample holder is output, the outer edge of the wheel is in the same horizontal plane as the lower end surface of the sample holder; when the sample holder is returned to its original position, the hinge is closed, the wheel is raised, the outer edge of the wheel and the end surface of the sample holder are in contact with each other, and the sample holder is pushed back to its original position.

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