CN211583547U - Screw rod transmission mechanism for small animal brain three-dimensional position finder - Google Patents
Screw rod transmission mechanism for small animal brain three-dimensional position finder Download PDFInfo
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- CN211583547U CN211583547U CN201922384728.XU CN201922384728U CN211583547U CN 211583547 U CN211583547 U CN 211583547U CN 201922384728 U CN201922384728 U CN 201922384728U CN 211583547 U CN211583547 U CN 211583547U
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Abstract
The utility model discloses a screw rod transmission mechanism for a three-dimensional positioner of a small animal brain, which comprises a screw rod, a first guide rod, a second guide rod, a front end fixing block, a rear end fixing block and a limiting slide seat, wherein one end of the screw rod is connected with the rear end fixing block through a deep groove ball bearing; the other end of the screw rod is sequentially sleeved with a first pressure bearing, a front end fixing block, a second pressure bearing and a locking nut and is in threaded connection with a rotating handle, and the rotating handle is screwed to tightly press the locking nut, the second pressure bearing and the first pressure bearing on the screw rod; a first guide rod and a second guide rod are respectively arranged between the front end fixing block and the rear end fixing block and positioned at two sides of the screw rod; the screw rod is sleeved with a screw sleeve, the screw sleeve is connected with the limiting sliding seat, and the limiting sliding seat slides back and forth along the screw rod, the first guide rod and the second guide rod. Implement the utility model discloses a lead screw drive mechanism for toy brain three-dimensional locater designs simply, and the transmission is stable, and the precision is high, and the consume is little, consequently, has prolonged life.
Description
Technical Field
The utility model relates to a precision control technical field, concretely relates to a screw drive mechanism for three-dimensional locater of toy brain.
Background
The three-dimensional locator for brain of small animal is an important research apparatus for preclinical research of brain diseases, and it uses special marks (such as bregma) on the skull surface of small animal as basic reference point, combines with brain atlas, determines the position of some nerve structure (nucleus) in the skull of small animal by the movement of its three axes, further performs injection, stimulation and record brain electricity to nerve structure, and can be used for animal models and related research of diseases such as Parkinson's disease, epilepsy, senile dementia, brain tumor, brain injury, etc.
At present, a commonly used three-dimensional moving mechanism is used for transmission, namely a T-shaped lead screw + guide rod structure (X, Z shaft) and a T-shaped lead screw + dovetail structure (Y shaft), two ends (X, Z shaft) of the lead screw and the guide rod, and the front end (Y shaft) of the lead screw and the dovetail structure are fixed by fixing blocks, a gap (convolution) between the lead screw and a screw sleeve is adjusted in a matching way through the tightness of three sets of parts, namely PEEK plastics and metal gaskets on two sides of the fixing block and a handle at the head end of the lead screw, and after the gap is adjusted to a certain degree, a pointed screw on the side surface (with a tooth hole) of a handle extrudes and props against an outer tooth at the front end of the lead screw so as to limit the tightness position of the handle to keep the same, so that the gap state between the lead screw and the screw sleeve is kept unchanged. Meanwhile, the X, Z shaft screw does not extend to the guide rod fixing block at the tail end (the opposite end of the rotating handle), and is in a suspended state.
However, there are three problems with this design: (1) in the back-and-forth transmission process of each shaft, the PEEK plastic gaskets and the metal gaskets on the two sides perform plane friction mutually, so that the loss is large, the gap between the screw rod and the screw sleeve is generated quickly, the transmission accuracy is deviated, and the hand feeling comfort degree is not good; (2) in the back-and-forth transmission process of each shaft, the acting force of the rotating handle is large, so that the pointed screw on the side surface of the handle extrudes, deforms and damages the outer teeth at the front end of the screw rod, the gap between the screw rod and the screw sleeve is generated quickly, the transmission accuracy is deviated, the hand feeling comfort level is poor, and the handle is difficult to screw down for maintenance due to the fact that the outer teeth at the front end of the screw rod are damaged, so that the whole transmission mechanism is directly scrapped; (3) because the front end of the screw rod is not fixedly guided in the whole process from the tail end (one section of the screw rod is suspended), the screw rod can deviate in the transmission process, the coaxiality is not enough, and the accuracy correspondingly generates deviation.
SUMMERY OF THE UTILITY MODEL
The utility model provides a screw drive mechanism for three-dimensional locater of toy brain has solved current screw drive mechanism loss big, the problem that unstable, precision are low and life is short.
The technical scheme of the utility model is realized like this:
the embodiment of the utility model discloses a lead screw drive mechanism for three-dimensional locater of small animal brain, the lead screw drive mechanism includes lead screw, first guide arm, second guide arm, front end fixed block, rear end fixed block and spacing slide, lead screw one end is connected with the rear end fixed block through deep groove ball bearing; the other end of the screw rod is sequentially sleeved with a first pressure bearing, a front end fixing block, a second pressure bearing and a locking nut and is in threaded connection with a rotating handle, and the rotating handle is screwed to tightly press the locking nut, the second pressure bearing and the first pressure bearing on the screw rod; a first guide rod and a second guide rod are respectively arranged between the front end fixing block and the rear end fixing block and positioned on two sides of the screw rod; the screw rod is sleeved with a screw sleeve, the screw sleeve is connected with the limiting sliding seat, and the limiting sliding seat slides back and forth along the screw rod, the first guide rod and the second guide rod.
Furthermore, any one of the first pressure bearing and the second pressure bearing comprises an upper round pressure sheet, a lower round pressure sheet and a plurality of balls which are arranged between the upper round pressure sheet and the lower round pressure sheet in an annular mode, and the balls roll along the radial direction of the screw rod.
Furthermore, a main scale is arranged on any one of the first guide rod and the second guide rod, and the main scale is matched with an auxiliary scale arranged on the limiting sliding seat and used for measuring the moving distance of the screw rod.
Furthermore, one end of any one of the first guide rod and the second guide rod is connected with the rear end fixing block through a shaft sleeve, and the other end of the guide rod is connected with the front end fixing block through a jackscrew.
Furthermore, the rotating handle is provided with anti-skid lines for skid resistance.
The utility model provides a screw drive mechanism for three-dimensional locater of toy brain has following beneficial effect:
the utility model provides a clearance that is used for this three sets of mechanisms of lead screw drive mechanism front end use pressure bearing (the both sides of front end fixed block), lock nut and twist grip of toy brain three-dimensional locater to cooperate the regulation to eliminate the lead screw, improves stability, the accuracy of using, increase of service life to and improve use comfort, there are two big advantages: firstly, in the back-and-forth transmission process of each shaft, the pressure bearings (the two metal sheet tracks clamp the metal balls) do rolling motion on the plane, which is similar to the motion between the train wheels and the rails, and the part loss caused by friction is hardly generated; secondly, the clearance is eliminated, the clearance is fastened through the matching of the nut and the rotating handle, the stability of the reverse fastening is kept unchanged permanently, meanwhile, the external teeth at the front end of the screw rod are not damaged by mistake, the maintenance is not affected, and the later maintenance cost is saved;
and secondly, the screw rod extends to a tail end guide rod fixing block (the opposite end of the rotating handle), and a deep groove ball bearing is arranged on the fixing block to support the screw rod to rotate, so that the screw rod always moves on a straight line, and the transmission stability is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a screw rod transmission mechanism for a small animal brain three-dimensional position finder according to an embodiment of the present invention;
fig. 2 is an exploded structural schematic view of a screw rod transmission mechanism for a small animal brain three-dimensional position finder according to an embodiment of the present invention;
fig. 3 is a schematic view of a pressure bearing structure in a screw rod transmission mechanism of a three-dimensional positioning instrument for the brain of a small animal according to an embodiment of the present invention;
fig. 4 is an exploded view of the pressure bearing shown in fig. 3.
Detailed Description
The invention will be further understood by the following examples of embodiments of the invention, which are not intended to limit the invention. Insubstantial modifications and adaptations of the invention as described herein will occur to those skilled in the art and are intended to be within the scope of the invention.
Referring to fig. 1 to 4, a screw rod transmission mechanism 100 for a small animal brain three-dimensional positioning instrument includes a screw rod 1, a first guide rod 2, a second guide rod 3, a front end fixing block 4, a rear end fixing block 5 and a limiting slide seat 6, wherein one end of the screw rod 1 is connected with the rear end fixing block 5 through a deep groove ball bearing 7; the other end of the screw rod 1 is sequentially sleeved with a first pressure bearing 8, a front end fixing block 4, a second pressure bearing 9 and a locking nut 10 and is in threaded connection with a rotating handle 11, and the rotating handle 11 is screwed in a threaded manner to tightly press the locking nut 10, the second pressure bearing 9 and the first pressure bearing 8 on the screw rod 1; a first guide rod 2 and a second guide rod 3 are respectively arranged between the front end fixed block 4 and the rear end fixed block 5 and positioned at two sides of the screw rod 1; the screw rod 1 is sleeved with a screw sleeve 12, the screw sleeve 12 is connected with a limiting sliding seat 6, and the limiting sliding seat 6 slides back and forth along the screw rod 1, the first guide rod 2 and the second guide rod 3.
The utility model discloses a screw drive mechanism for three-dimensional locater of toy brain can be used for single drive track or multidimension degree drive track etc. through setting up this screw drive mechanism, can realize accurate mechanical transmission, and its wearing and tearing are little, and stability is good, long service life.
According to the utility model discloses an embodiment, arbitrary pressure bearing in this first pressure bearing 8 and the second pressure bearing 9 includes circle pressure piece 81, circle pressure piece 82 down and locates a plurality of balls 83 that are the annular range between circle pressure piece 81 and circle pressure piece 82 down, and ball 83 radially rolls along lead screw 1.
According to the utility model discloses an embodiment is equipped with the main scale 21 on any guide arm in this first guide arm 2 and the second guide arm 3, and the main scale sets up and is used for measuring lead screw 1 displacement with locating the cooperation of the sub scale 22 on spacing slide 6.
According to the utility model discloses an embodiment, the one end of any guide arm in this first guide arm 2 and the second guide arm 3 is connected with rear end fixed block 5 through axle sleeve 13, and its other end is connected with front end fixed block 4 through jackscrew 14.
According to the utility model discloses an embodiment is equipped with on this twist grip 11 and is used for skid-proof anti-skidding line 111, sets up the convenient manual rotation regulation of anti-skidding line 111.
Further explanation is as follows:
according to the technical scheme, through holes are formed in the limiting slide seat in a direction perpendicular to the screw rod, the through holes are used for arranging other screw rod transmission mechanisms which are perpendicular to the screw rod transmission mechanism for the three-dimensional small animal brain positioning instrument to form an X-Y screw rod transmission device, the X-Y screw rod transmission device is connected with the screw rod transmission mechanism through a connecting mechanism to form a three-dimensional X-Y-Z transmission mechanism, and the three-dimensional X-Y-Z transmission mechanism is used for precise transmission in the three-dimensional small animal brain positioning instrument.
The utility model provides a screw drive mechanism for three-dimensional locater of toy brain has following beneficial effect:
the utility model provides a clearance that is used for this three sets of mechanisms of lead screw drive mechanism front end use pressure bearing (the both sides of front end fixed block), lock nut and twist grip of toy brain three-dimensional locater to cooperate the regulation to eliminate the lead screw, improves stability, the accuracy of using, increase of service life to and improve use comfort, there are two big advantages: firstly, in the back-and-forth transmission process of each shaft, the pressure bearings (the two metal sheet tracks clamp the metal balls) do rolling motion on the plane, which is similar to the motion between the train wheels and the rails, and the part loss caused by friction is hardly generated; secondly, the clearance is eliminated, the clearance is fastened through the matching of the nut and the rotating handle, the stability of the reverse fastening is kept unchanged permanently, meanwhile, the external teeth at the front end of the screw rod are not damaged by mistake, the maintenance is not affected, and the later maintenance cost is saved;
and secondly, the screw rod extends to a tail end guide rod fixing block (the opposite end of the rotating handle), and a deep groove ball bearing is arranged on the fixing block to support the screw rod to rotate, so that the screw rod always moves on a straight line, and the transmission stability is ensured.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A screw rod transmission mechanism for a small animal brain three-dimensional position finder is characterized by comprising a screw rod, a first guide rod, a second guide rod, a front end fixing block, a rear end fixing block and a limiting sliding seat, wherein one end of the screw rod is connected with the rear end fixing block through a deep groove ball bearing; the other end of the screw rod is sequentially sleeved with a first pressure bearing, a front end fixing block, a second pressure bearing and a locking nut and is in threaded connection with a rotating handle, and the rotating handle is screwed to tightly press the locking nut, the second pressure bearing and the first pressure bearing on the screw rod; a first guide rod and a second guide rod are respectively arranged between the front end fixing block and the rear end fixing block and positioned on two sides of the screw rod; the screw rod is sleeved with a screw sleeve, the screw sleeve is connected with the limiting sliding seat, and the limiting sliding seat slides back and forth along the screw rod, the first guide rod and the second guide rod.
2. The screw drive according to claim 1, wherein any one of the first and second pressure bearings comprises an upper circular pressure plate, a lower circular pressure plate, and a plurality of balls arranged in a ring shape between the upper circular pressure plate and the lower circular pressure plate, the balls rolling in a radial direction of the screw.
3. The lead screw transmission mechanism according to claim 1, wherein a main scale is provided on any one of the first guide rod and the second guide rod, and the main scale is matched with a sub scale provided on the limiting slide carriage and used for measuring the moving distance of the lead screw.
4. The screw drive according to claim 1, wherein one end of either of the first and second guide rods is connected to the rear end fixing block through a bushing, and the other end thereof is connected to the front end fixing block through a jack screw.
5. The screw drive of claim 1, wherein the rotating handle is provided with anti-slip threads for preventing slipping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922384728.XU CN211583547U (en) | 2019-12-26 | 2019-12-26 | Screw rod transmission mechanism for small animal brain three-dimensional position finder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922384728.XU CN211583547U (en) | 2019-12-26 | 2019-12-26 | Screw rod transmission mechanism for small animal brain three-dimensional position finder |
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| CN211583547U true CN211583547U (en) | 2020-09-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111053619A (en) * | 2019-12-26 | 2020-04-24 | 深圳华阳生物技术有限公司 | Screw rod transmission mechanism for small animal brain three-dimensional position finder |
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2019
- 2019-12-26 CN CN201922384728.XU patent/CN211583547U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111053619A (en) * | 2019-12-26 | 2020-04-24 | 深圳华阳生物技术有限公司 | Screw rod transmission mechanism for small animal brain three-dimensional position finder |
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