CN211751441U - Transmission screw rod device of high-pressure injector - Google Patents
Transmission screw rod device of high-pressure injector Download PDFInfo
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- CN211751441U CN211751441U CN201922090537.2U CN201922090537U CN211751441U CN 211751441 U CN211751441 U CN 211751441U CN 201922090537 U CN201922090537 U CN 201922090537U CN 211751441 U CN211751441 U CN 211751441U
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- bearing seat
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Abstract
The utility model discloses a transmission lead screw device of high pressure syringe relates to medical instrument's technical field, has solved the unstable technical problem that just drops easily of lead screw in the course of the work. The device comprises a driving motor, a screw rod and a push rod, wherein a bearing seat is arranged below a coupler, a bearing is arranged at the upper end of the bearing seat, and the end part of the screw rod is arranged in the bearing in a penetrating way and is connected with the coupler; the screw rod is provided with a positioning boss, the lower end of the bearing seat is provided with a mounting hole, the positioning boss is inserted in the mounting hole, and the positioning boss is in contact connection with the bearing; a first positioning assembly is arranged between the coupler and the bearing seat, and a second positioning assembly is further arranged between the first positioning assembly and the bearing seat. The utility model discloses it is rational in infrastructure, can effectually fix a position the lead screw, make its stable and firm work that carries on, avoided the lead screw to rock or the problem that breaks away from with the shaft coupling, great improvement reliability, the security of high-pressure syringe in the use.
Description
Technical Field
The utility model relates to the technical field of medical equipment, more specifically say, it relates to a transmission lead screw device of high-pressure syringe.
Background
With the rapid development of modern medicine, high-pressure syringes are more widely used. In radiotherapy or disease diagnosis, a high-pressure syringe is generally used as an auxiliary device for medical equipment such as CT, MRI, and DSA. The high-pressure injector can ensure that the contrast agent and the physiological saline are injected into the cardiovascular of a patient in a centralized way in a short time, and the examined part is filled with high concentration, so as to take a better image of the contrast agent. Therefore, the high-pressure injector is used, the contrast agent injection, the host exposure and the film exchange of the film changer can be completed in a highly close fit manner, and the shooting efficiency and quality are greatly improved.
The screw rod of the existing high-pressure injector is connected with a driving motor through a coupler, and a locking bolt is arranged on the coupler to tightly push the screw rod on the coupler. The high-pressure injector is easy to generate negative pressure in the medicine pumping process, and the lead screw is easy to fall off from the coupler by the negative pressure. If the phenomenon that the screw rod falls off occurs in the using process, the contrast medium needs to be injected into the patient again, and the psychological burden of the patient is increased to a certain extent. In addition, the falling of the screw rod is easy to cause medical accidents. In addition, the injection pressure is one of the key parameters of the high-pressure injector, and the high-pressure injector indirectly reflects the injection pressure by utilizing the reaction force generated during injection to act on the pressure strain gauge between the driving motor and the coupling. Because the injection speed of the high-pressure injector is extremely fast, the lead screw is easy to swing in the injection process, so that the stress of the pressure strain gauge is uneven, the pressure difference distance between the detected pressure and the actual injection pressure is large, and potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to prior art not enough, provides a transmission lead screw device of high pressure syringe, can effectually fix a position the lead screw.
The technical scheme of the utility model lies in: a transmission screw rod device of a high-pressure injector comprises a driving motor, a screw rod and a push rod, wherein the screw rod is rotationally connected with the driving motor through a coupler, the push rod is sleeved on the screw rod in a sliding mode, a bearing seat is arranged below the coupler, a bearing is installed in the bearing seat, and the end portion of the screw rod is installed in the bearing in a penetrating mode and is connected with the coupler; the screw rod is provided with a positioning boss, the lower end of the bearing seat is provided with a mounting hole, the positioning boss is inserted in the mounting hole, and the positioning boss is in contact connection with the bearing; a first positioning assembly is arranged between the coupler and the bearing seat, and a second positioning assembly is further arranged between the first positioning assembly and the bearing seat.
The screw rod comprises a first mounting column body, a second mounting column body and a body which are integrated, the first mounting column body is mounted on the coupler, the second mounting column body penetrates through the bearing seat and is mounted in the bearing, and a through hole which is axially vertical to the screw rod is formed in the joint of the first mounting column body and the second mounting column body; the first positioning assembly comprises a positioning pin, and the positioning pin is installed in the through hole.
Furthermore, two ends of the positioning pin protrude out of the inner hole of the bearing.
Furthermore, an annular groove is formed in the second mounting column body below the positioning pin, and the groove is arranged close to the through hole; the second positioning assembly comprises a clamp spring, and the clamp spring is installed in the groove.
Furthermore, the inner hole of the bearing is positioned in the projection of the clamp spring.
Furthermore, a ball pair is connected to the screw rod in a threaded manner, and the push rod is mounted on the ball pair.
Advantageous effects
The utility model has the advantages that: the screw rod is positioned by the bearing seat and the bearing arranged in the bearing seat, so that the screw rod is stable and reliable in the rotating process, and the stability of the high-pressure injector in the using process is improved. Through arranging the location boss in bearing frame one side, make when high-pressure syringe injects, the even distribution of the reaction force that the lead screw received the push rod is on the bearing, and the effectual stress that has avoided rocking the production because of the lead screw is uneven and makes pressure foil gage appear the problem of pressure fluctuation, has guaranteed high-pressure syringe injection pressure's accuracy. In addition, the positioning effect of the first positioning assembly and the second positioning assembly arranged on the other side of the bearing seat enables the high-pressure injector to be separated from the coupler due to overlarge stress of the screw rod in the medicine drawing process, and the reliability and the safety of the high-pressure injector in the using process are greatly improved.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged schematic view of the junction between the coupler and the lead screw according to the present invention;
fig. 3 is a schematic view of the screw rod structure of the present invention.
Wherein: 1-driving motor, 2-coupler, 3-lead screw, 4-push rod, 5-bearing seat, 6-bearing, 7-positioning pin, 8-snap spring, 9-ball pair, 31-positioning boss, 32-first mounting column, 33-second mounting column, 34-body, 35-through hole and 36-groove.
Detailed Description
The present invention will be further described with reference to the following examples, which are not intended to limit the scope of the present invention, but are intended to be covered by the appended claims in any way.
Referring to fig. 1-2, the present invention relates to a driving screw device for a high pressure injector, which comprises a driving motor 1, a screw 3 and a push rod 4. The screw rod 3 is rotationally connected with the driving motor 1 through the coupler 2, and the push rod 4 is sleeved on the screw rod 3 in a sliding mode. The upper end of the coupler 2 is provided with a bearing seat 5, and a bearing 6 is arranged in the bearing seat 5. Specifically, the bearing seat 5 is provided with a mounting groove on the end face of one end of the coupler 2, and the bearing 6 is mounted in the mounting groove. The end of the screw rod 3 is penetratingly mounted in the bearing 6 and connected with the coupling 2. The screw rod 3 is arranged in the bearing 6, and the screw rod 3 is positioned through the bearing 6, so that the driving motor 1 stably and reliably drives the screw rod 3 to rotate, and the stability and the reliability of the high-pressure injector in the using process are improved.
The screw rod 3 is provided with a positioning boss 31, and the lower end of the bearing seat 5 is provided with a mounting hole. Specifically, the mounting hole penetrates through the mounting groove. The positioning boss 31 is inserted in the mounting hole, and the positioning boss 31 is in contact connection with the bearing 6. A first positioning assembly is arranged between the coupler 2 and the bearing seat 5, and a second positioning assembly is further arranged between the first positioning assembly and the bearing seat 5. When the lead screw 3 promotes the push rod 4 and moves down, when the high pressure syringe injects promptly, through the anti-apical action of location boss 31 to bearing 6, make lead screw 3 receive the even distribution of the reaction force of push rod 4 on bearing 6, the effectual stress of having avoided rocking the production because of lead screw 3 is uneven and makes pressure foil gage appear the problem of pressure fluctuation, has guaranteed the accuracy of high pressure syringe injection pressure. When 3 pulling push rods 4 of lead screw move backward, the high pressure syringe draws the medicine process promptly, through the positioning action of first locating component and second locating component to lead screw 3, has effectually avoided drawing medicine in-process lead screw 3 and produced the problem that breaks away from with shaft coupling 2 because of the atress is too big, great improvement reliability, the security of high pressure syringe in the use.
Referring to fig. 3, in the present embodiment, the lead screw 3 includes a first mounting column 32, a second mounting column 33 and a body 34, the first mounting column 32 is mounted on the coupler 2, and the second mounting column 33 penetrates through the bearing seat 5 and is mounted in the bearing 6. The joint of the first mounting column 32 and the second mounting column 33 is provided with a through hole 35 which is vertical to the axial direction of the screw rod 3. The first positioning component comprises a positioning pin 7, the positioning pin 7 is installed in the through hole 35, and two ends of the positioning pin 7 protrude out of an inner hole of the bearing 6. An annular groove 36 is formed in the second mounting column 33 below the positioning pin 7, and the groove 36 is arranged adjacent to the through hole 35. The second positioning assembly comprises a clamp spring 8, the clamp spring 8 is installed in the groove 36, and an inner hole of the bearing 6 is located in the projection of the clamp spring 8. Namely, the length of the positioning pin 7 and the outside of the clamp spring 8 are both larger than the diameter of the inner hole of the bearing 6. Compare with the mode that only relies on the locking bolt on the shaft coupling 2 to fix lead screw 3, through the dual positioning effect of jump ring 8 and locating pin 7, more effectually prevented lead screw 3 at the process of drawing the medicine because of the too big problem that breaks away from with shaft coupling 2 of atress, make high-pressure syringe reliable safety more in the use.
The screw rod 3 is connected with a ball pair 9 through threads, and the push rod 4 is fixedly arranged on the ball pair 9. The driving motor 1 is linked with the screw rod 3 to rotate, so that the screw rod 3 drives the ball pair 9 and the push rod 4 to do reciprocating motion, and injection or drug pumping action of the high-pressure injector is finished.
The above is only the preferred embodiment of the present invention, and it should be noted that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which will not affect the utility model and the utility of the patent.
Claims (6)
1. A transmission screw rod device of a high-pressure injector comprises a driving motor (1), a screw rod (3) and a push rod (4), wherein the screw rod (3) is rotatably connected with the driving motor (1) through a coupler (2), and the push rod (4) is sleeved on the screw rod (3) in a sliding manner; the screw rod (3) is provided with a positioning boss (31), the lower end of the bearing seat (5) is provided with a mounting hole, the positioning boss (31) is inserted in the mounting hole, and the positioning boss (31) is in contact connection with the bearing (6); a first positioning assembly is arranged between the coupler (2) and the bearing seat (5), and a second positioning assembly is further arranged between the first positioning assembly and the bearing seat (5).
2. The transmission screw device of the high-pressure injector according to claim 1, wherein the screw (3) comprises a first mounting cylinder (32), a second mounting cylinder (33) and a body (34) which are integrated, the first mounting cylinder (32) is mounted on the coupler (2), the second mounting cylinder (33) penetrates through the bearing seat (5) and is mounted in the bearing (6), and a through hole (35) which is perpendicular to the axial direction of the screw (3) is formed at the joint of the first mounting cylinder (32) and the second mounting cylinder (33); the first positioning component comprises a positioning pin (7), and the positioning pin (7) is installed in the through hole (35).
3. The drive screw device of a high-pressure injector according to claim 2, wherein both ends of the positioning pin (7) protrude from the inner hole of the bearing (6).
4. The drive screw device of a high-pressure injector according to claim 2 or 3, characterized in that an annular groove (36) is provided on the second mounting cylinder (33) below the positioning pin (7), and the groove (36) is arranged adjacent to the through hole (35); the second positioning assembly comprises a clamp spring (8), and the clamp spring (8) is installed in the groove (36).
5. The drive screw device of a high-pressure injector according to claim 4, characterized in that the inner bore of the bearing (6) is located within the projection of the circlip (8).
6. The lead screw device of a high pressure injector according to claim 1, characterized in that a ball pair (9) is screwed on the lead screw (3), and the push rod (4) is mounted on the ball pair (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922090537.2U CN211751441U (en) | 2019-11-28 | 2019-11-28 | Transmission screw rod device of high-pressure injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922090537.2U CN211751441U (en) | 2019-11-28 | 2019-11-28 | Transmission screw rod device of high-pressure injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211751441U true CN211751441U (en) | 2020-10-27 |
Family
ID=72961480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922090537.2U Active CN211751441U (en) | 2019-11-28 | 2019-11-28 | Transmission screw rod device of high-pressure injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211751441U (en) |
-
2019
- 2019-11-28 CN CN201922090537.2U patent/CN211751441U/en active Active
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