Single-guide lead screw lifting mechanism of titrator

Abstract

The utility model provides a titrator single guide screw lifting mechanism, which comprises a mounting rack, a driving mechanism and a lifting mechanism, the driving mechanism and the lifting mechanism are arranged on the mounting rack in a left-right spaced manner, and a transmission gear arranged on a top output shaft of the driving mechanism and the lifting mechanism is meshed and connected with a driven gear sleeved on the lifting mechanism in a threaded manner. A double-guide screw rod mechanism composed of an existing screw rod shaft and a screw rod sleeve arranged on the screw rod shaft in a threaded and sleeving mode is changed into an independent guide structure composed of the driven gear and the screw rod shaft, and meanwhile the top of the screw rod shaft is provided with the guide rod with the guide function, so that the lifting stability is improved; the driving motor is moved to the side of the lifting mechanism, so that the overall height of the lifting mechanism is obviously reduced; the lifting mechanism is simple and novel in structural design, stable in lifting operation, low in production cost and good in practicability.

Description

Technical Field

[0001] The utility model relates to a titrator for chemical experiments, in particular to a single guide screw lifting mechanism of the titrator. Background Art

[0002] Titration analysis is a commonly used analytical technique and also a chemical experimental operation. The titration test instrument currently commonly used is the automatic potentiometric titrator, which is a common analytical instrument for capacity analysis designed based on the principle of potentiometric method. The principle of potentiometric method is: select appropriate indicator electrode and reference electrode to form a working cell with the solution to be tested. With the addition of titrant, the concentration of the ion to be tested changes continuously due to chemical reaction, so the potential of the indicator electrode changes accordingly. Near the titration end point, the concentration of the ion to be tested changes suddenly, causing a sudden jump in the electrode potential. Therefore, the titration end point can be determined based on the sudden jump in the electrode potential.

[0003] The lifting mechanism used in the existing automatic potentiometric titrator is as follows: Figure 1 As shown, the lifting rod 300' is installed on the frame 100' through the screw motor 200' for lifting. Because the lifting rod 300' is not equipped with a guide shaft, when the screw motor 200' drives the screw shaft 201' thereon to rotate, and the rotation of the screw shaft 201' synchronously drives the screw sleeve 301' threaded thereon to lift up and down, it is easy to cause the lifting rod 300' installed thereon to shake. During the shaking process, the screw shaft 201' will hit the inner wall of the lifting rod 300', which is easy to cause the screw shaft 201' to be damaged; and the existing screw shaft 201' is directly sleeved in the lifting rod 300', and the lifting rod 300' has a deep hole in the middle, which requires higher processing accuracy during processing, increasing the production cost. Utility Model Content

[0004] Aiming at the above technical defects of the existing lifting mechanism for automatic potentiometric titrator, the utility model provides a single guide screw lifting mechanism for the titrator with simple and novel structural design and stable lifting operation.

[0005] The utility model adopts the following technical solutions to solve the above technical problems:

[0006] A single guide screw lifting mechanism for a titrator comprises a mounting frame, a driving mechanism and a lifting mechanism, wherein the driving mechanism and the lifting mechanism are arranged on the mounting frame with a left-right spacing, and a transmission gear mounted on the top output shaft is meshedly connected with a driven gear threadedly sleeved on the lifting mechanism.

[0007] Preferably, the mounting frame comprises a first mounting platform and a second mounting platform, wherein:

[0008] The first mounting platform is located below the second mounting platform, and the driving mechanism with the output shaft facing upward is installed in the middle of the bottom of the first mounting platform;

[0009] The right end positions of the first mounting platform and the second mounting platform are limitedly installed with the vertically arranged lifting mechanism, and the transmission gear and the driven gear in a meshing arrangement are installed between the two.

[0010] Preferably, the mounting frame further comprises a first supporting column and a second supporting column, wherein:

[0011] There are four first supporting columns, which are vertically installed at the four corners of the bottom of the first mounting platform respectively;

[0012] There are four second supporting columns, which are vertically installed at the four corners of the top of the first mounting platform, and the top ends of the second supporting columns are connected to the four corners of the bottom of the second mounting platform.

[0013] More preferably, the four first supporting columns and the four second supporting columns are arranged correspondingly in upper and lower parts, and the diameter of the first supporting columns is greater than the diameter of the second supporting columns.

[0014] Preferably, the mounting frame further comprises a guide column and a limiting bottom plate, wherein:

[0015] There are two guide columns, which are respectively fixedly mounted on the bottom of the first mounting platform and located on both sides of the lifting mechanism;

[0016] There is one limiting bottom plate, both ends of which are fixedly connected to the lower ends of the two guide columns respectively, and the whole is arranged in a U-shaped structure.

[0017] Preferably, the driving mechanism comprises a driving motor and a transmission gear, wherein:

[0018] The driving motor is installed at the middle bottom of the first mounting platform on the mounting frame, and the transmission gear is fixedly installed on the output shaft at the top end.

[0019] Preferably, the lifting mechanism comprises a screw shaft, a guide rod, a driven gear and a screw sleeve, wherein:

[0020] The screw shaft is coaxially arranged with the guide rod provided at its top end, and connected to form an integral structure, and the whole is arranged vertically;

[0021] The inner ring fixing sleeve of the driven gear is provided with the lead screw sleeve, and the lead screw sleeve is threadedly sleeved on the lead screw shaft.

[0022] More preferably, the length of the guide rod is 1 / 4-1 / 6 of the length of the screw shaft, and the diameter of the driven gear is 1.5-3 times the diameter of the transmission gear.

[0023] Preferably, the lifting mechanism further comprises a first support bearing and a second support bearing, wherein:

[0024] The first support bearing is fixedly mounted on the first mounting platform of the mounting frame, the top of the inner ring of the first support bearing is abutted against the bottom of the lead screw sleeve, and the lead screw shaft is movably inserted into the through hole of the inner ring;

[0025] The second support bearing is fixedly mounted on the second mounting platform of the mounting frame, the bottom of the inner ring of the second support bearing is abutted against the top of the lead screw sleeve, and the lead screw shaft or the guide rod is movably inserted into the through hole of the inner ring.

[0026] Preferably, the lifting mechanism further comprises a guide block, wherein:

[0027] The middle part of the guide block is fixedly connected to the lower end of the screw shaft, and can be slidably sleeved on the guide columns on both sides through the through holes at both ends.

[0028] The utility model adopts the above technical solution, and compared with the prior art, has the following technical effects:

[0029] The single-guide screw lifting mechanism of the titrator provided by the utility model is mainly composed of an installation frame, a driving mechanism and a lifting mechanism. The driving mechanism and the lifting mechanism are arranged on the installation frame with a left and right interval, and the transmission gear installed on the top output shaft is meshed and connected with the driven gear threadedly sleeved on the lifting mechanism, so that the up and down movement of the screw shaft of the lifting mechanism is realized by the driving mechanism arranged on the side by the screw lifting method; the lifting mechanism changes the double-guide screw mechanism composed of the existing screw shaft and the screw sleeve threadedly sleeved therewith into a separate guide structure composed of the driven gear and the screw shaft, and at the same time, a guide rod with a guiding function is provided on the top of the screw shaft, thereby increasing the stability of lifting; at the same time, the driving motor is moved to the side of the lifting structure, which significantly reduces the overall height of the lifting mechanism; in summary, the single-guide screw lifting mechanism has a simple and novel structural design, stable lifting operation, low production cost and good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a lifting mechanism for an existing automatic potentiometric titrator;

[0031] Figure 2 The three-dimensional structure diagram of the single guide screw lifting mechanism of the titrator in this utility model Figure 1 ;

[0032] Figure 3The three-dimensional structure diagram of the single guide screw lifting mechanism of the titrator in this utility model Figure 2 ;

[0033] Figure 4 This is a schematic diagram of the main structure of a single guide screw lifting mechanism of a titrator in the utility model;

[0034] Figure 5 This is a cross-sectional structural schematic diagram of a single guide screw lifting mechanism of a titrator according to the utility model;

[0035] Figure 6 The utility model is a side view structural schematic diagram of a single guide screw lifting mechanism of a titrator. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0037] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0038] In some embodiments, Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 A single guide screw lifting mechanism for a titrator is provided, which mainly includes a mounting frame 100, a driving mechanism 200 and a lifting mechanism 300 assembled into an integrated structure, wherein: the driving mechanism 200 and the lifting mechanism 300 are installed on the mounting frame 100 with a left-right interval, that is, the driving mechanism 200 is installed on the side of the lifting mechanism 300.

[0039] The screw shaft 301 on the lifting mechanism 300 is limitedly installed on the mounting frame 100, and the limiting method is to use guide blocks 307 to be limitedly installed on the guide columns 105 on both sides, so as to achieve the purpose of only being able to move up and down. A transmission gear 202 is installed on the output shaft at the top of the driving mechanism 200, and the transmission gear 202 is meshed and connected with a driven gear 303 threadedly sleeved on the screw shaft 301 in the lifting mechanism 300. The screw shaft 301 can be lifted up and down by the transmission gear 202 and the driven gear 303 using the screw lifting method.

[0040] Specifically, Figure 2 and Figure 4As shown, the mounting frame 100 mainly includes a first supporting column 101, a first mounting platform 102, a second supporting column 103 and a second mounting platform 104. The first mounting platform 102 is located below the second mounting platform 104 and is supported and fixed by the first supporting columns 101 and the second supporting columns 103 respectively.

[0041] Specifically, the driving mechanism 200 with the output shaft facing upward is installed in the middle position at the bottom of the first mounting platform 102; the vertically arranged lifting mechanism 300 is installed at the right end position limit of the first mounting platform 102 and the second mounting platform 104, and the transmission gear 202 and the driven gear 303 are installed between the two in a meshing arrangement.

[0042] In addition, there are four first support columns 101, which are respectively installed vertically at the four corners of the bottom of the first mounting platform 102; there are four second support columns 103, which are respectively installed vertically at the four corners of the top of the first mounting platform 102, and their top ends are respectively connected to the four corners of the bottom of the second mounting platform 104. The four first support columns 101 and the four second support columns 103 are arranged in correspondence up and down, and the diameter of the first support column 101 is greater than the diameter of the second support column 103.

[0043] In some of the embodiments, Figure 2 and Figure 3 As shown, in order to ensure that the screw shaft 301 can move up and down stably, the screw shaft 301 needs to be limited and guided. The specific solution is to install a guide column 105 and a limit bottom plate 106 on the mounting frame 100, and the guide column 105 guides the screw shaft 301 to slide up and down along the guide column 105 through the guide block 307 sleeved thereon, thereby preventing the screw shaft 301 from shaking during the lifting process.

[0044] Among them, there are two guide columns 105, which are fixedly installed at the bottom of the first mounting platform 102 and located on both sides of the lifting mechanism 300; there is one limiting base plate 106, and its two ends are fixedly connected to the lower ends of the two guide columns 105, and the overall structure is U-shaped.

[0045] During the lifting process, the screw shaft 301 can only move up and down due to the limiting guiding function of the guide column 105, which solves the problem of shaking of the existing lifting mechanism during the lifting process and the screw shaft hitting the inner wall of the lifting rod, which may easily cause damage to the screw shaft.

[0046] In some of the embodiments, Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the driving mechanism 200 includes a driving motor 201 and a transmission gear 202 , wherein the driving motor 201 is a servo motor, which is installed at the middle bottom position of the first installation platform 102 of the installation frame 100 .

[0047] The output shaft of the driving motor 201 is arranged upward, and the top of the output shaft extends between the first mounting platform 102 and the second mounting platform 104, and the transmission gear 202 is fixedly mounted on the top of the output shaft by a key connection. By starting the driving motor 201, the transmission gear 202 can be driven to rotate synchronously.

[0048] In some of the embodiments, Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the lifting mechanism 300 includes a screw shaft 301, a guide rod 302, a driven gear 303 and a screw sleeve 304, wherein: the screw shaft 301 and the guide rod 302 set at its top are coaxially arranged and connected as an integral structure, and the whole is arranged vertically.

[0049] The gear on the outer ring of the driven gear 303 is meshed with the transmission gear 202 and can be driven by the transmission gear 202 to rotate synchronously. In order to realize the screw transmission lifting between the driven gear 303 and the screw shaft 301, the screw sleeve 304 is fixedly installed on the inner ring of the driven gear 303, and the screw sleeve 304 is threadedly sleeved on the screw shaft 301 to form a screw lifting mechanism. The screw sleeve 304 rotates synchronously under the drive of the driven gear 303, and the screw sleeve 304 can realize the up and down movement of the screw shaft 301 by means of screw lifting while rotating.

[0050] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the length of the guide rod 302 is 1 / 4-1 / 6 of the length of the screw shaft 301. The guide rod 302 mainly starts the guiding function and is gap-connected with the inner hole wall of the second support bearing 306. The diameter of the driven gear 303 is 1.5-3 times, preferably 1.8 times, of the diameter of the transmission gear 202, so as to increase the transmission ratio between the transmission gear 202 and the driven gear 303 and improve the lifting speed.

[0051] In some of the embodiments, Figure 4 , Figure 5 and Figure 6As shown, in order to ensure the stability of the screw transmission between the driven gear 303, the screw sleeve 304 and the screw shaft 301 and avoid the driven gear 303 and the screw sleeve 304 from shaking during operation, the lifting mechanism 300 also includes a first support bearing 305 and a second support bearing 306, and the top and bottom of the screw sleeve 304 are limited by the first support bearing 305 and the second support bearing 306.

[0052] Specifically, the first support bearing 305 is fixedly mounted on the first mounting platform 102 of the mounting frame 100, the top of the inner ring of which is abutted against the bottom of the screw sleeve 304, and the screw shaft 301 is movably inserted into the through hole of the inner ring. The second support bearing 306 is fixedly mounted on the second mounting platform 104 of the mounting frame 100, the bottom of the inner ring of which is abutted against the top of the screw sleeve 304, and the screw shaft 301 or the guide rod 302 is movably inserted into the through hole of the inner ring.

[0053] In addition, the lifting mechanism 300 further includes a guide block 307 , the middle portion of which is fixedly connected to the lower end of the screw shaft 301 , and can be slidably mounted on the guide columns 105 on both sides through through holes at both ends thereof.

[0054] The utility model provides a titrator single guide screw lifting mechanism, and its working principle is as follows Figures 2 to 6 As shown, the driving motor 201 is started, and the transmission gear 202 installed on its top output shaft synchronously drives the driven gear 303 meshing with it to rotate. When the driven gear 303 rotates, the electric lead screw sleeve 304 rotates. Since the lead screw sleeve 304 and the lead screw shaft 301 are threadedly connected, the lead screw sleeve 304 can drive the lead screw shaft 301 to move up and down by means of lead screw lifting while rotating, thereby achieving the purpose of stable lifting.

[0055] The lifting mechanism changes the existing double-guide screw mechanism composed of the screw shaft and the screw sleeve with a thread sleeve to a single guide structure composed of a driven gear 303 and a screw shaft 301, and at the same time, a guide rod 303 with a guiding function is provided on the top of the screw shaft 301, thereby increasing the stability of lifting; in addition, the driving mechanism 200 is moved to the side of the lifting structure 30, which significantly reduces the overall height of the lifting mechanism. Therefore, the lifting mechanism has a simple and novel structural design, stable lifting operation, low production cost, and good practicality.

[0056] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0057] Secondly, the drawings of the embodiments disclosed in the present utility model only involve structures related to the embodiments disclosed in the present utility model, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0058] Finally, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A titrator single guide screw lifting mechanism, characterized in that: It includes a mounting frame, a driving mechanism and a lifting mechanism, wherein the driving mechanism and the lifting mechanism are arranged on the mounting frame with a left-right spacing, and the transmission gear installed on the top output shaft is meshedly connected with the driven gear threadedly sleeved on the lifting mechanism.

2. The single guide screw lifting mechanism of the titrator according to claim 1, characterized in that: The mounting frame comprises a first mounting platform and a second mounting platform, wherein: The first mounting platform is located below the second mounting platform, and the driving mechanism with the output shaft facing upward is installed in the middle of the bottom of the first mounting platform; The right end positions of the first mounting platform and the second mounting platform are limitedly installed with the vertically arranged lifting mechanism, and the transmission gear and the driven gear in a meshing arrangement are installed between the two.

3. The single guide screw lifting mechanism of the titrator according to claim 2, characterized in that: The mounting frame further comprises a first supporting column and a second supporting column, wherein: There are four first supporting columns, which are vertically installed at the four corners of the bottom of the first mounting platform respectively; There are four second supporting columns, which are vertically installed at the four corners of the top of the first mounting platform, and the top ends of the second supporting columns are connected to the four corners of the bottom of the second mounting platform.

4. The single guide screw lifting mechanism of the titrator according to claim 3, characterized in that: The four first supporting columns and the four second supporting columns are arranged correspondingly up and down, and the diameter of the first supporting columns is greater than the diameter of the second supporting columns.

5. The single guide screw lifting mechanism of the titrator according to claim 2, characterized in that: The mounting frame further comprises a guide column and a limiting bottom plate, wherein: There are two guide columns, which are respectively fixedly mounted on the bottom of the first mounting platform and located on both sides of the lifting mechanism; There is one limiting bottom plate, both ends of which are fixedly connected to the lower ends of the two guide columns respectively, and the whole is arranged in a U-shaped structure.

6. The single guide screw lifting mechanism of the titrator according to claim 1, characterized in that: The driving mechanism comprises a driving motor and a transmission gear, wherein: The driving motor is installed at the middle bottom of the first mounting platform on the mounting frame, and the transmission gear is fixedly installed on the output shaft at the top end.

7. The single guide screw lifting mechanism for a titrator according to claim 1, characterized in that: The lifting mechanism comprises a screw shaft, a guide rod, a driven gear and a screw sleeve, wherein: The screw shaft is coaxially arranged with the guide rod provided at its top end, and connected to form an integral structure, and the whole is arranged vertically; The inner ring fixing sleeve of the driven gear is provided with the lead screw sleeve, and the lead screw sleeve is threadedly sleeved on the lead screw shaft.

8. The single guide screw lifting mechanism for a titrator according to claim 7, characterized in that: The length of the guide rod is 1 / 4-1 / 6 of the length of the screw shaft, and the diameter of the driven gear is 1.5-3 times the diameter of the transmission gear.

9. The single guide screw lifting mechanism for a titrator according to claim 7, characterized in that: The lifting mechanism further comprises a first support bearing and a second support bearing, wherein: The first support bearing is fixedly mounted on the first mounting platform of the mounting frame, the top of the inner ring of the first support bearing is abutted against the bottom of the lead screw sleeve, and the lead screw shaft is movably inserted into the through hole of the inner ring; The second support bearing is fixedly mounted on the second mounting platform of the mounting frame, the bottom of the inner ring of the second support bearing is abutted against the top of the lead screw sleeve, and the lead screw shaft or the guide rod is movably inserted into the through hole of the inner ring.

10. The single guide screw lifting mechanism for a titrator according to claim 7, characterized in that: The lifting mechanism further comprises a guide block, wherein: The middle part of the guide block is fixedly connected to the lower end of the screw shaft, and can be slidably sleeved on the guide columns on both sides through the through holes at both ends.

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