CN211986553U - Injection pump - Google Patents
Injection pump Download PDFInfo
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- CN211986553U CN211986553U CN201921988165.9U CN201921988165U CN211986553U CN 211986553 U CN211986553 U CN 211986553U CN 201921988165 U CN201921988165 U CN 201921988165U CN 211986553 U CN211986553 U CN 211986553U
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- mounting hole
- guide
- guide rod
- guide sleeve
- slider
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Abstract
The utility model discloses an injection pump uses the utility model discloses during the injection pump in the embodiment, the high-speed rotary motion of motor output converts the rotary motion of lead screw under drive mechanism's effect, because the screw on the slider, with lead screw thread fit, and the slider converts the linear motion of slider under the restriction of first guide bar and second guide bar into, and the slider promotes the catch bar at the removal of first guide bar and second guide bar and is linear motion. In the working process, because first uide bushing is fixed on the slider, can guarantee the direction precision between first uide bushing and the first guide bar, and deposit the headspace between second uide bushing and the first guide bar, the second uide bushing can float slide on the second guide bar, and the smooth and easy degree when difficult appearance bite phenomenon assurance operation.
Description
Technical Field
The utility model relates to the technical field of medical equipment, more specifically say, relate to an injection pump.
Background
The injection pump is driven by a motor, and the rotation of the motor is converted into an integral structure which can control, monitor and move linearly with high precision. In the design layout of a traditional injection pump, in order to ensure the precision of the traditional injection pump in the linear motion process, the injection pump is generally provided and comprises a sliding block and a guide rod, the sliding block keeps smooth motion by using lubricant or lubricating grease, and redundant grease falls in the pump body in the sliding process. The common plastic sliding block adopts self-lubricating property to meet the requirement, but the guiding precision is poor.
Therefore, how to improve the guiding precision of the injection pump and ensure the smoothness of operation is a problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims to solve the technical problem that how to improve the smooth and easy degree when guaranteeing the operation when the direction precision of syringe pump, for this reason, the utility model provides a syringe pump and syringe pump.
In order to achieve the above object, the utility model provides a following technical scheme:
a syringe pump, comprising:
a pump body mounting seat;
the motor is arranged at one end of the pump body mounting seat;
the transmission mechanism is arranged at one end of the pump body mounting seat and is in transmission connection with the motor;
the lead screw is connected with the output end of the transmission mechanism;
the two ends of the first guide rod are fixed on the pump body mounting seat;
the two ends of the second guide rod are fixed on the pump body mounting seat and are arranged in parallel with the first guide rod;
the sliding block is arranged on the first guide rod and the second guide rod, a nut is arranged at one end, opposite to the lead screw, of the sliding block, and the nut is in threaded fit with the lead screw;
the push rod is arranged in the pump body mounting seat in a sliding mode and located between the first guide rod and the second guide rod, and one end, extending into the pump body mounting seat, of the push rod is fixed on the sliding block;
the first guide sleeve is sleeved on the first guide rod and fixed on the sliding block; and
and a second guide sleeve is sleeved on the second guide rod, and a reserved space for moving in the direction of the connecting line of the first guide rod and the second guide rod is arranged between the second guide sleeve and the sliding block.
According to the above technical scheme, use the embodiment of the utility model provides a during the syringe pump, the high-speed rotary motion of motor output converts the rotary motion of lead screw under drive mechanism's effect, because the screw on the slider, with lead screw thread fit, and the slider converts the linear motion of slider under the restriction effect of first guide bar and second guide bar, and the slider promotes the catch bar at the removal of first guide bar and second guide bar and is linear motion. In the installation process, when the first guide sleeve is fixed on the sliding block, because the reserved space is arranged between the second guide sleeve and the sliding block, even if an error exists in the machining of the sliding block, the second guide sleeve can be smoothly installed in the sliding block in the reserved space and smoothly slides on the second guide rod. In the working process, because first uide bushing is fixed on the slider, can guarantee the direction precision between first uide bushing and the first guide bar, and deposit the headspace between second uide bushing and the first guide bar, the second uide bushing can float slide on the second guide bar, and the smooth and easy degree when difficult appearance bite phenomenon assurance operation.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 and fig. 2 are schematic perspective views of an injection pump according to an embodiment of the present invention;
fig. 3 is a schematic perspective sectional view of an injection pump according to an embodiment of the present invention;
fig. 4 is a schematic top view of an injection pump according to an embodiment of the present invention;
fig. 5 is a schematic cross-sectional view of a slider according to an embodiment of the present invention;
fig. 6 is a schematic structural view of a slider provided with a first guide sleeve and a second guide sleeve according to an embodiment of the present invention;
fig. 7 to 12 are schematic diagrams illustrating the third mounting hole and the second guide sleeve according to different embodiments of the present invention;
in the drawing, 100 is a pump body mounting seat, 200 is a first guide rod, 300 is a second guide rod, 400 is a slider, 500 is a push rod, 600 is a first guide sleeve, 700 is a second guide sleeve, 801 is a motor, 802 is a transmission mechanism, 901 is a lead screw, 902 is a nut, 101 is a first fastening screw, 102 is a second fastening screw, 103 is a third fastening screw, 104 is a fourth fastening screw, 401 is a first mounting hole, 402 is a second mounting hole, 403 is a third mounting hole, 4031 is a notch, 4032 is a first limit step, 4033 is a second limit step, 4034 is a first positioning ring, 4035 is a second positioning ring, 4036 is a third limit ring, 701 is a first protrusion, and 702 is a second protrusion.
Detailed Description
The core of the utility model is to provide an injection pump and injection pump to guarantee the smooth and easy degree when moving when improving the direction precision of injection pump.
The embodiments described below do not limit the scope of the invention described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the invention described in the claims.
To this end, referring to fig. 1 to 12, an injection pump according to an embodiment of the present invention includes:
a pump body mount 100;
a motor 801 provided at one end of the pump body mount 100;
a transmission mechanism 802 arranged at one end of the pump body mounting base 100 and in transmission connection with the motor 801;
a lead screw 901 connected to an output end of the transmission mechanism 802;
a first guide bar 200 having both ends fixed to the pump body mount 100;
a second guide bar 300 having both ends fixed to the pump body mount 100 and arranged in parallel with the first guide bar 200;
the sliding block 400 is arranged on the first guide rod 200 and the second guide rod 300, a nut 902 is arranged at one end, opposite to the lead screw 901, of the sliding block 400, and the nut 902 is in threaded fit with the lead screw 901;
a push rod 500 slidably disposed in the pump body mounting seat 100 and located between the first guide rod 200 and the second guide rod 300, wherein one end of the push rod 500 extending into the pump body mounting seat 100 is fixed on the slider 400;
a first guide sleeve 600 fitted over the first guide bar 200 and fixed to the slider 400;
a second guide sleeve 700 sleeved on the second guide rod 300, and a reserved space moving in the direction of connecting the first guide rod 200 and the second guide rod 300 is formed between the second guide sleeve 700 and the slider 400;
a motor; and
and the transmission mechanism conveys the rotary motion output by the motor to the push rod and converts the rotary motion into linear motion of the sliding block on the first guide rod and the second guide rod under the action of the push rod.
Use the embodiment of the utility model provides an during injection pump, the high-speed rotary motion of motor 801 output converts the rotary motion of lead screw 901 under drive mechanism 802's effect, because screw 902 and lead screw 901 screw-thread fit on the slider 400, because be provided with first uide bushing 600 between slider 400 and the first guide bar 200, second uide bushing 700 has between slider 400 and the second guide bar 300, first uide bushing 600 is under the restriction of first guide bar 200, second uide bushing 700 converts the rotary motion of lead screw 901 into the linear motion of slider 400 under the restriction of second guide bar 300, and slider 400 drives catch bar 500 and is linear motion under the removal of first guide bar 200 and second guide bar 300. In the mounting process, when the first guide sleeve 600 is fixed on the slider 400, since the second guide sleeve 700 has a predetermined space with respect to the slider 400, even if there is an error in the processing of the slider 400, the second guide sleeve 700 can be smoothly mounted in the slider 400 and smoothly slide on the second guide bar 300 in the presence of the predetermined space. In the working process, because first uide bushing 600 is fixed on slider 400, can guarantee the direction precision between first uide bushing 600 and the first guide bar 200, and reserve space exists between second uide bushing 700 and the first guide bar 200, what second uide bushing 700 can float slides on second guide bar 300, and the smooth and easy degree when the smooth and easy degree of operation is guaranteed to the difficult jam phenomenon that appears.
The pump body mount 100 is configured to support the first guide rod 200, the second guide rod 300, and the push rod 500. The pump body mount 100 can be integrated with a particular structure in various applications, such as in a syringe pump, where the pump body mount 100 can be a pump body.
The effect of first uide bushing 600, second uide bushing 700 is that make slider 400 can slide smoothly on first guide bar 200 and second guide bar 300, wherein, the embodiment of the utility model provides an in the embodiment first uide bushing 600 and second uide bushing 700 be oiliness bush or linear bearing, set up oiliness bush and linear bearing and can guarantee first uide bushing 600 and second uide bushing 700 at the direction precision of first guide bar 200 and second guide bar 300. And the problem of grease falling can not exist in the operation process.
The slider 400 is operatively connected to the push rod 500 and the first and second guide rods 200 and 300, and in particular, the slider 400 includes a first mounting hole 401 for mounting the push rod 500, a second mounting hole 402 for mounting the first guide sleeve 600, and a third mounting hole 403 for mounting the second guide sleeve 700.
As is apparent from the above description, the first guide sleeve 600 is fixed in the second mounting hole 402, wherein various forms can be implemented in which the first guide sleeve 600 is fixed in the second mounting hole 402, for example, the first guide sleeve 600 is fixed in the second mounting hole 402 by a press-fitting process. Specifically, the press fitting process is an assembly process of pressing two parts with interference fit to a fit position.
Since the second mounting hole 402 is in interference fit with the first guide sleeve 600, after the first guide rod 200, the first guide sleeve 600 and the slider 400 are assembled, the position of the second guide sleeve 700 in the third mounting hole 403 and the position of the second guide rod 300 relative to the first guide rod 200 directly determine whether the syringe pump can be smoothly mounted, and if the first guide sleeve 600 is fixed in the third mounting hole 403, once the position of the third mounting hole 403 or the mounting position of the second guide rod 300 is deviated, the syringe pump cannot be smoothly mounted. Therefore, the utility model discloses in be provided with the headspace between third mounting hole 403 and second uide bushing 700, can guarantee the smooth installation of second uide bushing 700, second guide bar 300 slider 400 under the effect in headspace. That is, there is a degree of freedom between the third mounting hole 403 and the second guide sleeve 700 such that there is a certain amount of movement in the direction of the connection line between the first guide sleeve 600 and the second guide sleeve 700 to balance the machining error.
The above-mentioned preformed space can be formed in various ways, and the following specific descriptions are provided:
in one embodiment of the present invention, a notch 4031 is provided on the hole wall of the third mounting hole 403, and a reserved space can be formed through the notch 4031.
Referring to fig. 7 and 8, in one embodiment of the present invention, the notch 4031 is smaller than the length of the third mounting hole 403 along the axial direction of the slider 400, the second guiding sleeve 700 is disposed in the third mounting hole 403, and at least two portions of the second guiding sleeve 700 abut against two ends of the notch 4031 respectively, so as to limit the axial movement of the second guiding sleeve 700 relative to the slider 400.
At least two parts of the second guide sleeve 700 to be described above can be understood as two ends of the second guide sleeve 700, one end of the second guide sleeve 700 abuts against one end of the notch 4031, and the other end of the second guide sleeve 700 abuts against the other end of the notch 4031, so that the axial movement of the second guide sleeve 700 relative to the slider 400 is limited, in other words, when the slider 400 moves under the pushing of the push rod 500, the second guide sleeve 700 follows the slider 400 to move along the first guide rod 200 and the second guide rod 300 under the matching of the notch 4031 and the two ends of the second guide sleeve 700. Or a first protrusion 701 and a second protrusion 702 are respectively arranged on the peripheral surface of the second guide sleeve 700, wherein the first protrusion 701 abuts against one end of the notch 4031, and the second protrusion 702 abuts against the other end of the notch 4031, so that the axial movement of the second guide sleeve 700 relative to the slider 400 is limited, in other words, when the slider 400 moves under the pushing of the push rod 500, the second guide sleeve 700 follows the slider 400 to move along the first guide rod 200 and the second guide rod 300 under the cooperation of the notch 4031 and the first protrusion 701 and the second protrusion 702.
Referring to fig. 9 and 10, in one embodiment of the present invention, along the axial direction of the slider 400, the notch 4031 penetrates through the hole wall of the third mounting hole 403, the inner wall of the third mounting hole 403 or both ends of the third mounting hole 403 are provided with a first limit step 4032 and a second limit step 4033, the inner end surface of the first limit step 4032 abuts against at least a portion of the second guiding sleeve 700, and the inner end surface of the second limit step 4033 abuts against at least a portion of the second guiding sleeve 700, so as to limit the axial movement of the second guiding sleeve 700 relative to the slider 400.
With this structure, during assembly, the second guide sleeve 700 is mounted in the third mounting hole 403 from the notch 4031, wherein the inner end surface of the first limit step 4032 abuts against at least a part of the second guide sleeve 700, and the inner end surface of the second limit step 4033 abuts against at least a part of the second guide sleeve 700. As described above, the first limit step 4032 abuts one end of the second guide sleeve 700, and the second limit step 4033 abuts the other end of the second guide sleeve 700. Alternatively, the circumferential surface of the second guide sleeve 700 is provided with a first protrusion 701 and a second protrusion 702, wherein the first protrusion 701 abuts against the first limit step 4032, and the second protrusion 702 abuts against the second limit step 4033. The axial movement of the second guide sleeve 700 with respect to the slider 400 is restricted such that the second guide sleeve 700 follows the slider 400 to travel along the first guide bar 200 and the second guide bar 300.
Referring to fig. 11, in another embodiment of the present invention, the aperture of the portion of the third mounting hole 403 where the second guiding sleeve 700 is mounted is larger than the outer diameter of the second guiding sleeve 700, and a gap between the third mounting hole 403 and the second guiding sleeve 700 is a reserved space;
one end of the slider 400 is detachably provided with a first positioning ring 4034 for restricting the axial movement of the second guide sleeve 700 with respect to the slider 400, and the other end of the slider 400 is detachably or non-detachably provided with a second positioning ring 4035 for restricting the axial movement of the second guide sleeve 700 with respect to the slider 400.
Referring to fig. 12, the third mounting hole 403 is a stepped hole, and a portion of the stepped hole is used for mounting the second guide sleeve 700, and another portion of the stepped hole is used for receiving the second guide rod 300 to pass through. Wherein, the hole diameter for installing the second guide sleeve 700 is larger than the outer diameter of the second guide sleeve 700, and the hole diameter of the portion for accommodating the second guide rod 300 therethrough is smaller than the outer diameter of the second guide sleeve 700, so that one end of the second guide sleeve 700 can abut against the step surface of the transition of the two portions.
When the second guide sleeve 700 is assembled to the third mounting hole 403, a third positioning ring 4036 is detachably disposed at the end of the third mounting hole 403 having the larger diameter.
When the first positioning ring 4034, the second positioning ring 4035, and the third positioning ring 4036 are detachably provided in the slider 400, they are fixed by fasteners such as screws.
In order to further ensure the precision of the push rod 500 between the pump body mounting seats 100, a third guide sleeve is arranged between the push rod 500 and the pump body mounting seat 100. The third guide sleeve, the first guide sleeve 600 and the second guide sleeve 700 are oil-containing bushings or linear bearings.
The utility model provides a mode that first guide bar 200 and second guide bar 300 were fixed at pump body mount pad 100 has a lot, the utility model particularly introduces one kind, be provided with fourth mounting hole and the fifth mounting hole that is used for installing first guide bar 200 on pump body mount pad 100, fourth mounting hole and fifth mounting hole are arranged respectively in at the both ends of first guide bar 200, and be provided with first fastening screw 101 in the edge of fourth mounting hole, the edgewise overlap joint of first fastening screw 101 is on the terminal surface of first guide bar 200, be provided with second fastening screw 102 in the edge of fifth mounting hole, the edgewise overlap joint of second fastening screw 102 is on the terminal surface of first guide bar 200.
Be provided with sixth mounting hole and the seventh mounting hole that is used for installing second guide bar 300 on pump body mount pad 100, sixth mounting hole and seventh mounting hole are arranged respectively in at the both ends of second guide bar 300, and be provided with third fastening screw 103 in the edge of sixth mounting hole, the edgewise overlap joint of third fastening screw 103 is on the terminal surface of second guide bar 300, be provided with fourth fastening screw 104 in the edge of seventh mounting hole, the edgewise overlap joint of fourth fastening screw 104 is on the terminal surface of second guide bar 300.
The above second guide bar 300, the first guide bar 200 are of a cylindrical structure, a triangular prism structure, an elliptical prism structure, a quadrangular prism structure, and the like. The shape of the holes of the first and second guide sleeves 600 and 700 is matched with the cross-sectional shape of the first and second guide rods 200 and 300.
The utility model also discloses an injection pump, including the pump body, hollow shaft and the injection pump as above-mentioned arbitrary, wherein, pump body mount pad 100 in the injection pump is the pump body, and the hollow shaft is catch bar 500. Since the above syringe pump has the above advantageous effects, a syringe pump including the syringe pump also has corresponding effects.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (12)
1. A syringe pump, comprising:
a pump body mounting seat;
the motor is arranged at one end of the pump body mounting seat;
the transmission mechanism is arranged at one end of the pump body mounting seat and is in transmission connection with the motor;
the lead screw is connected with the output end of the transmission mechanism;
the two ends of the first guide rod are fixed on the pump body seat;
the two ends of the second guide rod are fixed on the pump body mounting seat and are arranged in parallel with the first guide rod;
the sliding block is arranged on the first guide rod and the second guide rod, a nut is arranged at one end, opposite to the lead screw, of the sliding block, and the nut is in threaded fit with the lead screw;
the push rod is arranged in the pump body mounting seat in a sliding mode and located between the first guide rod and the second guide rod, and one end, extending into the pump body mounting seat, of the push rod is fixed on the sliding block;
the first guide sleeve is sleeved on the first guide rod and fixed on the sliding block; and
and a second guide sleeve is sleeved on the second guide rod, and a reserved space for moving in the direction of the connecting line of the first guide rod and the second guide rod is arranged between the second guide sleeve and the sliding block.
2. The syringe pump of claim 1 wherein said slider block includes a first mounting hole for mounting said push rod, a second mounting hole for mounting said first guide sleeve, and a third mounting hole for mounting said second guide sleeve.
3. The syringe pump of claim 2 wherein said first guide housing is secured in said second mounting hole by a press-fit process.
4. The syringe pump of claim 2, wherein the wall of the third mounting hole is provided with a notch through which the headspace can be formed.
5. The syringe pump of claim 4 wherein the notch is less than the length of the third mounting hole in the axial direction of the slider, the second guide sleeve is disposed in the third mounting hole, and at least two portions of the second guide sleeve abut against respective ends of the notch to limit axial movement of the second guide sleeve relative to the slider.
6. The syringe pump of claim 4, wherein the notch extends through a wall of the third mounting hole in an axial direction of the slider, a first limit step and a second limit step are provided on an inner wall of the third mounting hole or at both ends of the third mounting hole, an inner end surface of the first limit step abuts against at least a portion of the second guide sleeve, and an inner end surface of the second limit step abuts against at least a portion of the second guide sleeve to limit axial movement of the second guide sleeve relative to the slider.
7. The syringe pump of claim 2, wherein the portion of the third mounting hole where the second guide sleeve is mounted has a larger bore diameter than the outer diameter of the second guide sleeve, and the gap between the third mounting hole and the second guide sleeve is the reserved space;
one end of the sliding block is detachably provided with a first positioning ring for limiting the second guide sleeve to axially move relative to the sliding block, and the other end of the sliding block is detachably or non-detachably provided with a second positioning ring for limiting the second guide sleeve to axially move relative to the sliding block.
8. The syringe pump of any of claims 1-7, wherein a third guide sleeve is disposed between the pusher arm and the pump body mount.
9. The syringe pump of claim 8 wherein the first, second and third guide sleeves are oil-impregnated bushings or linear bearings.
10. The syringe pump according to any one of claims 1 to 7, wherein a fourth mounting hole and a fifth mounting hole for mounting the first guide rod are provided on the pump body mounting seat, both ends of the first guide rod are respectively placed in the fourth mounting hole and the fifth mounting hole, a first fastening screw is provided at an edge of the fourth mounting hole, a rim of the first fastening screw overlaps on an end surface of the first guide rod, a second fastening screw is provided at an edge of the fifth mounting hole, and a rim of the second fastening screw overlaps on an end surface of the first guide rod.
11. The syringe pump of claim 10, wherein the pump body mounting seat is provided with a sixth mounting hole and a seventh mounting hole for mounting the second guide rod, two ends of the second guide rod are respectively disposed in the sixth mounting hole and the seventh mounting hole, a third fastening screw is disposed at an edge of the sixth mounting hole, a rim of the third fastening screw overlaps the end surface of the second guide rod, a rim of the seventh mounting hole is disposed with a fourth fastening screw, and a rim of the fourth fastening screw overlaps the end surface of the second guide rod.
12. The syringe pump of claim 11 wherein said second guide rod and said first guide rod are of cylindrical configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921988165.9U CN211986553U (en) | 2019-11-15 | 2019-11-15 | Injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921988165.9U CN211986553U (en) | 2019-11-15 | 2019-11-15 | Injection pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211986553U true CN211986553U (en) | 2020-11-24 |
Family
ID=73412395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921988165.9U Active CN211986553U (en) | 2019-11-15 | 2019-11-15 | Injection pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211986553U (en) |
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2019
- 2019-11-15 CN CN201921988165.9U patent/CN211986553U/en active Active
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