Ring type transmission medical piston pump
By connecting the camshaft and the transmission ring through a ring-type transmission structure, the structural failure and noise problems caused by the components losing contact in the medical piston pump are solved, achieving higher structural stability and service life.
Patent Information
- Application Number
- CN202520288540.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-02-21
AI Technical Summary
In existing medical piston pumps, failure of the mechanical connection between the camshaft and the rotor causes adjacent components to lose contact, resulting in structural failure and noise generation.
The ring transmission structure is adopted, in which the cam of the camshaft is connected to the transmission ring bearing, the transmission ring is hinged to the slider, and the piston rod is fixedly connected to the slider, so as to realize the eccentric rotation to drive the reciprocating motion of the slider and the piston rod, and avoid the adjacent parts from disengaging.
This improves the structural stability and service life of medical piston pumps, and avoids failures and noise problems caused by parts losing contact.
Smart Images
Figure CN223689873U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to medical instrument technical field, concretely relates to a ring type transmission medical piston pump. BACKGROUND
[0002] The existing medical piston pump structure form is camshaft-rotor-spring piston rod, wherein the camshaft and the rotor do not exist mechanical connection. The piston rod downlink relies on camshaft rotation drive, and the piston rod uplink relies on spring elastic force reset. When the spring elastic force is insufficient, the spring speed is slow or the spring is invalid, the rotor will intermittently contact with the camshaft, which leads to the medical piston pump failure, and at the same time, additional noise is generated. SUMMARY
[0003] In view of the defects of the prior art, the utility model provides a ring type transmission medical piston pump, solves the problem of the risk of structural failure caused by the disengagement of adjacent components of the medical piston pump.
[0004] To achieve the above object, the utility model realizes through the following technical scheme:
[0005] A ring type transmission medical piston pump, the medical piston pump comprises a camshaft, a transmission ring, a sliding block, a piston rod and a pump shell.
[0006] The cam of the camshaft is connected with the transmission ring bearing through a first bearing, the transmission ring is hinged with the sliding block, and the piston rod is fixedly connected with the sliding block.
[0007] The cam, the transmission ring, the first bearing and the sliding block are all installed in the pump shell, the shaft neck of the camshaft and the piston rod are partially contained in the pump shell, and the input end of the shaft neck and the output end of the piston rod both extend to the outside of the shell through the pump shell.
[0008] Preferably, the pump shell comprises a shell body and a shell cover.
[0009] The shell cover covers the opening of the shell body.
[0010] Preferably, a sealing strip is arranged around the opening of the shell body, the shell cover is provided with a sealing groove matched with the sealing strip, the sealing strip is contained in the sealing groove, and the installation gap between the shell body and the shell cover is sealed.
[0011] Preferably, the shell body is provided with a mounting groove, a second bearing is installed in the mounting groove, and the shaft neck is connected with the shell body bearing through the second bearing.
[0012] Preferably, the shell cover is provided with a first through hole, a counterbore is arranged at the inner end of the first through hole; a first sealing ring is installed in the first through hole, and a third bearing is installed in the counterbore; the shaft neck is rotationally sealed with the shell cover through the first sealing ring, and the shaft neck is connected with the shell cover bearing through the third bearing.
[0013] Preferably, the shell body is provided with a second through hole, and a second sealing ring is arranged in the second through hole, and the piston rod is sealed from the shell body through the second sealing ring.
[0014] Preferably, the slider comprises a bottom block and a top block.
[0015] The bottom block and the top block are hinged to the transmission ring through a pin shaft, and the bottom block and the top block are fixed through a screw.
[0016] Preferably, the bottom block is in contact with the inner wall of the shell body.
[0017] Preferably, a guide plate is arranged in the shell body, and the guide plate is used to limit the radial position of the slider.
[0018] Compared with the prior art, the medical piston pump has the following advantages
[0019] Beneficial effects:
[0020] In the utility model, the cam of the camshaft is connected with the transmission ring bearing through the first bearing, the transmission ring is hinged to the slider, and the piston rod is fixedly connected with the slider, when the shaft diameter of the camshaft is driven to rotate, the transmission ring makes eccentric rotation around the journal under the action of the cam and the first bearing, so as to drive the slider and the piston rod to make reciprocating motion, the situation that the adjacent components of the medical piston pump are separated from contact is avoided, and the structural stability and service life of the medical piston pump are improved. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.
[0022] Figure 1 It is the top view axonometric exploded view of the medical piston pump in the embodiments of the utility model.
[0023] Figure 2 It is the bottom view axonometric exploded view of the medical piston pump in the embodiments of the utility model.
[0024] The reference numerals in the drawing are set as follows: camshaft 10, cam 11, journal 12, transmission ring 20, first bearing 21, slider 30, bottom block 31, top block 32, piston rod 40, second sealing ring 41, shell body 50, shell cover 51, sealing strip 52, sealing groove 53, first through hole 54, counterbore 55, first sealing ring 56, third bearing 57, guide plate 58. DETAILED DESCRIPTION
[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model is described clearly and completely, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.
[0026] The application provides a ring transmission medical piston pump, which solves the problem of the risk of structural failure caused by disengagement of adjacent components of the medical piston pump.
[0027] In order to better understand the above technical scheme, the above technical scheme will be described in detail below in combination with the drawings of the specification and specific embodiments.
[0028] Embodiment:
[0029] As shown in Figure 1 , Figure 2 , the utility model provides a ring transmission medical piston pump, the medical piston pump includes: camshaft 10, transmission ring 20, sliding block 30, piston rod 40 and pump shell,
[0030] The cam 11 of camshaft 10 is connected with transmission ring 20 bearing through first bearing 21, transmission ring 20 is hinged with sliding block 30, and piston rod 40 is fixedly connected with sliding block 30.
[0031] The cam 11, transmission ring 20, first bearing 21 and sliding block 30 are all installed in the pump shell, the journal 12 of camshaft 10 and the part of piston rod 40 are contained in the pump shell, and the input end of journal 12 and the output end of piston rod 40 all extend to the outside of the shell through the pump shell.
[0032] As shown in Figure 1 , Figure 2 , the pump shell includes: shell body 50 and shell cover 51,
[0033] The shell cover 51 covers the opening of the shell body 50, and the two are fixedly connected through a plurality of screws.
[0034] As shown in Figure 1 , Figure 2 , the opening of shell body 50 is surrounded by a sealing strip 52, and the shell cover 51 is provided with a sealing groove 53 matched with the sealing strip 52, the sealing strip 52 is contained in the sealing groove 53, and the installation seam between the shell body 50 and the shell cover 51 is sealed.
[0035] The shell body 50 is provided with a mounting groove, and a second bearing is installed in the mounting groove, and the journal 12 is connected with the shell body 50 bearing through the second bearing.
[0036] As Figure 1 、 Figure 2 shown, the shell cover 51 is provided with a first through hole 54, and a counterbore 55 is arranged at the inner end of the first through hole 54; a first sealing ring 56 is arranged in the first through hole 54, and a third bearing 57 is arranged in the counterbore 55; the shaft neck 12 is rotatably sealed with the shell cover 51 through the first sealing ring 56, and the shaft neck 12 is bearing-connected with the shell cover 51 through the third bearing 57.
[0037] As Figure 1 、 Figure 2 shown, the shell body 50 is provided with a second through hole, and a second sealing ring 41 is arranged in the second through hole; the piston rod 40 is reciprocally sealed with the shell body 50 through the second sealing ring 41.
[0038] As Figure 1 shown, the sliding block 30 comprises a bottom block 31 and a top block 32.
[0039] The bottom block 31 and the top block 32 are both hingedly connected with the transmission ring 20 through a pin shaft, and the bottom block 31 is fixed with the top block 32 through a screw, so that the sliding block 30 is convenient to disassemble and assemble.
[0040] As Figure 1 shown, the bottom block 31 is in contact with the inner wall of the shell body 50, so that the sliding stability of the sliding block 30 is improved.
[0041] As Figure 1 shown, the shell body 50 is provided with a guide plate 58, and the guide plate 58 is used for limiting the radial position of the sliding block 30.
[0042] Compared with the prior art, the utility model has the following beneficial effects:
[0043] In the embodiment of the utility model, the cam 11 of the camshaft 10 is bearing-connected with the transmission ring 20 through the first bearing 21, the transmission ring 20 is hingedly connected with the sliding block 30, and the piston rod 40 is fixedly connected with the sliding block 30; when the shaft diameter 12 of the camshaft 10 is driven to rotate, the transmission ring 20 is eccentrically rotated around the shaft neck 12 under the action of the cam 11 and the first bearing 21, so as to drive the sliding block 30 and the piston rod 40 to reciprocate, the situation that adjacent components in the medical piston pump are separated from contact is avoided, and the structural stability and service life of the medical piston pump are improved.
[0044] It is to be noted that, in the present text, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.
[0045] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A ring drive medical piston pump characterized by, The medical piston pump comprises a camshaft (10), a transmission ring (20), a slider (30), a piston rod (40) and a pump shell; The cam (11) of the camshaft (10) is bearing connected with the transmission ring (20) through a first bearing (21), the transmission ring (20) is hinged with the slider (30), and the piston rod (40) is fixedly connected with the slider (30); The cam (11), the transmission ring (20), the first bearing (21) and the slider (30) are all installed in the pump shell, the journal (12) of the camshaft (10) and the piston rod (40) are partially contained in the pump shell, and the input end of the journal (12) and the output end of the piston rod (40) both extend to the outside of the shell through the pump shell.
2. A medical piston pump according to claim 1, characterized in that The pump shell comprises a shell body (50) and a shell cover (51); The shell cover (51) covers the opening of the shell body (50).
3. A medical piston pump according to claim 2, characterized in that A sealing strip (52) is arranged around the opening of the shell body (50), the shell cover (51) is provided with a sealing groove (53) matched with the sealing strip (52), the sealing strip (52) is contained in the sealing groove (53), and the installation gap between the shell body (50) and the shell cover (51) is sealed.
4. A medical piston pump according to claim 2, characterized in that The shell body (50) is provided with a mounting groove, a second bearing is installed in the mounting groove, and the journal (12) is bearing connected with the shell body (50) through the second bearing.
5. The medical piston pump of claim 2, wherein The shell cover (51) is provided with a first through hole (54), a counterbore (55) is arranged at the inner end of the first through hole (54), a first sealing ring (56) is installed in the first through hole (54), and a third bearing (57) is installed in the counterbore (55); the journal (12) is rotationally sealed with the shell cover (51) through the first sealing ring (56), and the journal (12) is bearing connected with the shell cover (51) through the third bearing (57).
6. The medical piston pump of claim 2, wherein The shell body (50) is provided with a second through hole, a second sealing ring (41) is installed in the second through hole, and the piston rod (40) is reciprocally sealed with the shell body (50) through the second sealing ring (41).
7. A medical piston pump according to claim 2, characterized in that The slider (30) comprises a bottom block (31) and a top block (32); The bottom block (31) and the top block (32) are both hinged with the transmission ring (20) through a pin shaft, and the bottom block (31) is fixed with the top block (32) through a screw.
8. A medical piston pump according to claim 7, characterized in that The bottom block (31) is in contact with the inner wall of the shell body (50).
9. A medical piston pump according to claim 2, characterized in that A guide plate (58) is arranged in the shell body (50), and the guide plate (58) is used for limiting the radial position of the slider (30).