CN218151280U

CN218151280U - Pumping mechanism

Info

Publication number: CN218151280U
Application number: CN202222705486.1U
Authority: CN
Inventors: 刘健波; 洪章鹏; 赵强; 孟佳彬; 常月
Original assignee: Hangzhou Guiling Medical Equipment Co ltd
Current assignee: Hangzhou Guiling Medical Equipment Co ltd
Priority date: 2022-10-12
Filing date: 2022-10-12
Publication date: 2022-12-27
Anticipated expiration: 2032-10-12

Abstract

The utility model provides a pumping mechanism relates to pumping mechanism technical field. The pumping mechanism includes: a camshaft, a push rod and a housing; a first bearing is arranged on the outer wall of the cam shaft; a second bearing corresponding to the first bearing is arranged at the tail end of the push rod, a return spring is arranged between the push rod and the shell, and the second bearing is always contacted with the first bearing under the action of the return spring; the camshaft is rotatory under the drive of motor, and the eccentric rotary motion of cam turns into the reciprocating motion of push rod through the transmission of first bearing and second bearing, and wherein, the cam transmits through the contact of first bearing and second bearing with the push rod, and the area of contact of transmission department is big, and first bearing and second bearing can freely rotate at the transmission in-process, have weakened wearing and tearing between them by a wide margin, have promoted pumping mechanism's spare part life by a wide margin.

Description

Pumping mechanism

Technical Field

The utility model relates to a pumping mechanism technical field, concretely relates to pumping mechanism.

Background

The pumping mechanism is a device that converts the rotational motion of the motor into a reciprocating motion of the push rod. Generally comprising a drive assembly and a pushrod assembly.

At present, a pumping mechanism has a model in which a transmission assembly and a push rod assembly are integrally formed, and also has a model in which the transmission assembly and the push rod assembly are separated. The pumping mechanism in the integrally formed type has large volume, wastes materials and has high requirement on the use space; and the processing difficulty is high, and the manufacturing cost is high. The transmission assembly of the split pumping mechanism and the push rod assembly need to be connected or directly contacted by pin shaft parts, the stress area of the joint of the transmission assembly and the push rod assembly is small, the bearing pressure is large, and the service life of parts is short.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a pumping mechanism has solved the problem that pumping mechanism spare part life is low.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:

a pumping mechanism, the pumping mechanism comprising: a camshaft, a push rod and a housing;

a first bearing is arranged on the outer wall of the cam shaft;

the tail end of the push rod is provided with a second bearing corresponding to the first bearing, a return spring is arranged between the push rod and the shell, and the second bearing is always in contact with the first bearing under the action of the return spring.

Preferably, the housing includes: an upper case and a lower case;

the upper shell is detachably connected with the lower shell;

the camshaft is connected with the upper shell bearing through a third bearing;

the camshaft is connected with the lower shell bearing through a fourth bearing.

Preferably, the housing is provided with a first opening, and the camshaft extends out of the housing through the first opening;

the first opening is provided with a first oil seal, and the first oil seal is used for dynamically sealing the camshaft.

Preferably, the tail end of the push rod is provided with a push rod support, and the second bearing is installed on the push rod support through a pin shaft.

Preferably, a limiting plate is arranged in the shell, the push rod penetrates through the return spring and the limiting plate, and the return spring is arranged between the push rod support and the limiting plate.

Preferably, the housing is provided with a second opening, and the push rod extends out of the housing through the second opening;

and a second oil seal is arranged at the outer end of the second opening and used for dynamically sealing the push rod.

Preferably, the inner end of the second opening is provided with a sliding sleeve, and the push rod penetrates through the sliding sleeve and freely slides along the sliding sleeve.

(III) advantageous effects

The utility model provides a pumping mechanism. Compared with the prior art, the method has the following beneficial effects:

the utility model discloses in, pumping mechanism includes: a camshaft, a push rod and a housing; a first bearing is arranged on the outer wall of the cam shaft; a second bearing corresponding to the first bearing is arranged at the tail end of the push rod, a return spring is arranged between the push rod and the shell, and the second bearing is always contacted with the first bearing under the action of the return spring; the camshaft is rotatory under the drive of motor, and the eccentric rotary motion of cam turns into the reciprocating motion of push rod through the transmission of first bearing and second bearing, and wherein, the cam carries out the transmission through the contact of first bearing with the second bearing with the push rod, and the area of contact of transmission department is big, and first bearing and second bearing can freely rotate at the transmission in-process, have weakened wearing and tearing between them by a wide margin, have promoted pumping mechanism's spare part life by a wide margin.

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 an exploded view of a pumping mechanism in an embodiment of the present invention;

fig. 2 is a schematic diagram of an internal structure of a pumping mechanism according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a pumping mechanism in an embodiment of the present invention.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The embodiment of the application solves the problem that the service life of parts of the pumping mechanism is short by providing the pumping mechanism.

In order to solve the technical problems, the general idea of the embodiment of the application is as follows:

in an embodiment of the present invention, the pumping mechanism includes: a camshaft, a push rod and a housing; a first bearing is arranged on the outer wall of the cam shaft; a second bearing corresponding to the first bearing is arranged at the tail end of the push rod, a return spring is arranged between the push rod and the shell, and the second bearing is always contacted with the first bearing under the action of the return spring; the camshaft is rotatory under the drive of motor, and the eccentric rotary motion of cam turns into the reciprocating motion of push rod through the transmission of first bearing and second bearing, and wherein, the cam transmits through the contact of first bearing and second bearing with the push rod, and the area of contact of transmission department is big, and first bearing and second bearing can freely rotate at the transmission in-process, have weakened wearing and tearing between them by a wide margin, have promoted pumping mechanism's spare part life by a wide margin.

In order to better understand the technical scheme, the technical scheme is described in detail in the following with reference to the attached drawings of the specification and specific embodiments.

Example (b):

as shown in fig. 1-3, the utility model provides a pumping mechanism, pumping mechanism includes: camshaft 10, pushrod 20 and housing;

a first bearing 12 is arranged on the outer wall of a cam 11 of the camshaft 10;

a second bearing 21 corresponding to the first bearing 12 is arranged at the tail end of the push rod 20, a return spring 30 is arranged between the push rod 20 and the shell, and the second bearing 21 is always in contact with the first bearing 12 under the action of the return spring 30;

the camshaft 10 is driven by the motor to rotate, the eccentric rotation motion of the cam 11 is converted into the reciprocating motion of the push rod 20 through the transmission of the first bearing 12 and the second bearing 21, wherein the cam 11 and the push rod 20 are in transmission through the contact of the first bearing 12 and the second bearing 21, the contact area of the transmission position is large, the first bearing 12 and the second bearing 21 can rotate freely in the transmission process, the abrasion of the first bearing and the second bearing is greatly reduced, and the service lives of parts of the pumping mechanism are greatly prolonged.

As shown in fig. 1 to 3, the housing includes: an upper case 40 and a lower case 41;

the upper shell 40 is detachably connected with the lower shell 41;

the camshaft 10 is in bearing connection with the upper shell 40 through a third bearing 13;

the camshaft 10 is bearing-connected to the lower housing 41 via a fourth bearing 14.

As shown in fig. 1 and 2, the housing is provided with a first opening, and the camshaft 10 extends out of the housing through the first opening, so that the camshaft 10 is conveniently connected with the motor;

the first opening is provided with a first oil seal 42, and the first oil seal 42 dynamically seals the camshaft 10.

As shown in fig. 1 and 2, a push rod bracket 22 is disposed at a distal end of the push rod 20, and the second bearing 21 is mounted on the push rod bracket 22 through a pin 23.

As shown in fig. 1 and 2, a limit plate 43 is disposed in the housing, the push rod 20 passes through the return spring 30 and the limit plate 43, and the return spring 30 is disposed between the push rod bracket 22 and the limit plate 43 to provide a return acting force for the push rod 20.

As shown in fig. 1 to fig. 3, the housing is provided with a second opening, and the push rod 20 extends out of the housing through the second opening;

the outer end of the second opening is provided with a second oil seal 44, and the second oil seal 44 performs dynamic sealing on the push rod 20.

As shown in fig. 2, a sliding sleeve 45 is disposed at an inner end of the second opening, and the push rod 20 passes through the sliding sleeve 45 and freely slides along the sliding sleeve 45.

To sum up, compare with prior art, the utility model discloses possess following beneficial effect:

in an embodiment of the utility model, the pumping mechanism includes: a camshaft, a push rod and a housing; a first bearing is arranged on the outer wall of the cam shaft; a second bearing corresponding to the first bearing is arranged at the tail end of the push rod, a return spring is arranged between the push rod and the shell, and the second bearing is always contacted with the first bearing under the action of the return spring; the camshaft is rotatory under the drive of motor, and the eccentric rotary motion of cam turns into the reciprocating motion of push rod through the transmission of first bearing and second bearing, and wherein, the cam transmits through the contact of first bearing and second bearing with the push rod, and the area of contact of transmission department is big, and first bearing and second bearing can freely rotate at the transmission in-process, have weakened wearing and tearing between them by a wide margin, have promoted pumping mechanism's spare part life by a wide margin.

It is noted that, herein, relational terms such as first and second, and the like may 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. Also, 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 may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pumping mechanism, comprising: a camshaft (10), a push rod (20), and a housing;

a first bearing (12) is arranged on the outer wall of a cam (11) of the camshaft (10);

the tail end of the push rod (20) is provided with a second bearing (21) corresponding to the first bearing (12), a return spring (30) is arranged between the push rod (20) and the shell, and the second bearing (21) is always in contact with the first bearing (12) under the action of the return spring (30).

2. The pumping mechanism of claim 1, wherein the housing comprises: an upper case (40) and a lower case (41);

the upper shell (40) is detachably connected with the lower shell (41);

the camshaft (10) is in bearing connection with the upper shell (40) through a third bearing (13);

the camshaft (10) is in bearing connection with the lower shell (41) through a fourth bearing (14).

3. The pumping mechanism according to claim 1, wherein the housing defines a first opening through which the camshaft (10) extends outside the housing;

the first opening is provided with a first oil seal (42), and the first oil seal (42) is used for dynamically sealing the camshaft (10).

4. Pumping mechanism according to claim 1, wherein the end of the push rod (20) is provided with a push rod support (22), and the second bearing (21) is mounted on the push rod support (22) by means of a pin (23).

5. The pumping mechanism according to claim 1, wherein a limit plate (43) is provided in the housing, the push rod (20) passes through a return spring (30) and the limit plate (43), and the return spring (30) is disposed between the push rod holder (22) and the limit plate (43).

6. The pumping mechanism according to any one of claims 1 to 5, wherein the housing defines a second opening, and the push rod (20) extends out of the housing through the second opening;

and a second oil seal (44) is arranged at the outer end of the second opening, and the second oil seal (44) is used for dynamically sealing the push rod (20).

7. The pumping mechanism according to claim 6, wherein the inner end of the second opening is provided with a sliding sleeve (45), and the push rod (20) passes through the sliding sleeve (45) and freely slides along the sliding sleeve (45).