CN221120198U

CN221120198U - Transmission mechanism and plunger pump

Info

Publication number: CN221120198U
Application number: CN202322071822.6U
Authority: CN
Inventors: 孙伟国; 张时琨; 董乾清; 严锋杰; 杨川
Original assignee: NINGBO FUSLE MECHANICAL MANUFACTURING CO LTD
Current assignee: NINGBO FUSLE MECHANICAL MANUFACTURING CO LTD
Priority date: 2023-08-03
Filing date: 2023-08-03
Publication date: 2024-06-11
Anticipated expiration: 2033-08-03

Abstract

The utility model relates to a plunger pump technical field especially relates to a drive mechanism and plunger pump, a drive mechanism, including driving gear, driven gear and cam, driving gear and driven gear meshing, the drive shaft and the driving gear of motor are connected, the motor drives the driving gear and rotates, and then drive the rotation of driven gear, cam and driven gear joint, the rotation of driven gear drives the cam rotation, the rotation of cam drives plunger reciprocating motion, interference fit has first bearing on the cam, first bearing rotates along with the rotation of cam, the rotation of first bearing drives plunger reciprocating motion, first bearing is plane bearing, the one end and the first bearing contact of plunger, one side that the cam was kept away from to the driven gear is connected with first deep groove ball bearing. Because the cam is in eccentric form and is clamped with the driven gear, the rotation of the driven gear drives the cam to rotate, and the rotation of the cam drives the plunger to reciprocate, the arrangement structure is simple, and the assembly is convenient.

Description

Transmission mechanism and plunger pump

Technical Field

The disclosure relates to the technical field of plunger pumps, and in particular relates to a transmission mechanism and a plunger pump.

Background

Pumps are machines that deliver or pressurize liquids, which transfer mechanical or other external energy from a prime mover to the liquid, causing an increase in energy to the liquid, primarily for delivering liquids including water, oil, acid lye, emulsions, suspensions, liquid metals, and the like, as well as liquids, gas mixtures, and liquids containing suspended solids. Currently, pumps are an essential component in the transport of liquids, which take on the role of absorbing the liquid and draining it during the liquid transport process.

Plunger pumps are an important device of hydraulic systems. The plunger reciprocates in the cylinder body to change the volume of the sealed working cavity, so as to realize oil absorption and pressure oil. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like, and is widely applied to occasions requiring high pressure, high flow and flow regulation.

The utility model patent with the application number 201320172979.1 discloses a transmission mechanism for a high-pressure plunger pump, which comprises a cylinder body, a plunger frame, a plunger, a thrust bearing, a rotating shaft, a cam, a driven gear, a driving gear, a deep groove ball bearing and a transmission shaft used for being connected with a motor, wherein the plunger frame is connected with the cylinder body, the rotating shaft is connected between the cylinder body and the plunger frame, the driving gear is connected with one end of the transmission shaft and meshed with the driven gear, a small bearing and an oil seal are arranged between the transmission shaft and the cylinder body, the cam is sleeved on the rotating shaft, one end of the cam is connected with the thrust bearing, the plunger is arranged on the plunger frame, one end of the plunger is propped against the thrust bearing, the driven gear is arranged on the rotating shaft through the deep groove ball bearing, the other end of the cam is provided with an annular boss matched with the shaft hole of the driven gear, a plurality of bulges are uniformly distributed on the annular boss, and a plurality of grooves for the bulges to be clamped in are arranged on one end face of the driven gear. Because the two ends of the rotating shaft are respectively inserted into the two grooves of the cylinder body, the transmission mechanism for the high-pressure plunger pump has higher requirements on the processing precision of the cylinder body and higher assembly difficulty, and the two grooves on the cylinder body are just required to be arranged oppositely, so that the rotating shaft can be assembled in the grooves.

Disclosure of utility model

Aiming at the defects or problems in the prior art, the present disclosure provides a transmission mechanism with simple structure and convenient assembly.

The technical scheme adopted by the present disclosure for solving the technical problems is as follows: the utility model provides a drive mechanism, includes driving gear, driven gear and cam, driving gear and driven gear meshing, and the drive shaft and the driving gear of motor are connected, and the motor drives driving gear and rotates, and then drives driven gear's rotation, cam and driven gear joint, driven gear's rotation drive cam rotation, and the rotation of cam drives plunger reciprocating motion.

As a preferred embodiment, the cam is provided with a first bearing in an interference fit manner, the first bearing rotates along with the rotation of the cam, and the rotation of the first bearing drives the plunger to reciprocate.

In a preferred embodiment, the first bearing is a planar bearing, and one end of the plunger is in contact with the first bearing.

As a preferred embodiment, a first deep groove ball bearing is connected to the side of the driven gear away from the cam.

As a preferred embodiment, a connecting shaft is arranged on one side of the driven gear, and the first deep groove ball bearing is in interference fit with the connecting shaft.

Further, one side of the driven gear, which is close to the first deep groove ball bearing, is provided with a concave, an annular convex block is arranged on the concave, the connecting shaft is arranged on the annular convex block, the first deep groove ball bearing comprises a large annular structure and a small annular structure, the large annular structure is arranged outside the small annular structure, and the outer diameter of the annular convex block is larger than or equal to the outer diameter of the small annular structure.

As a preferred embodiment, the other side of the driven gear is provided with a groove, the inner peripheral wall of the groove is provided with a plurality of limit lugs, one side of the cam, which is close to the driven gear, is provided with a first annular bulge, the first annular bulge is provided with a plurality of clamping grooves, and the clamping grooves are matched with the limit lugs to connect the cam with the driven gear.

As a preferred embodiment, the height of the first annular protrusion is gradually reduced or gradually increased in the radial direction.

As a preferred embodiment, the cam includes a first portion and a second portion, the first portion and the second portion are integrally formed, the first portion is an annular structure disposed on the second portion, an outer diameter of the annular structure is smaller than an outer diameter of the first annular protrusion, and the first annular protrusion is disposed on the second portion.

As the preferred embodiment, the plane bearing comprises a first annular part, a second annular part and a plurality of balls, wherein the balls are uniformly distributed between the first annular part and the second annular part, one side surface of the first annular part is attached to the second part of the cam, the inner diameter of the first annular part is larger than or equal to the outer diameter of the annular structure, and the inner diameter of the second annular part is equal to the outer diameter of the annular structure.

As a preferred embodiment, a second deep groove ball bearing is arranged on the driving shaft of the motor.

Another object of the present disclosure is to provide a plunger pump, which includes a cylinder, wherein the cylinder is connected with a plunger frame, and a plunger is disposed on the plunger frame, and the above-mentioned transmission mechanism drives the plunger to reciprocate.

Compared with the prior art, the cam is clamped with the driven gear in an eccentric mode, the rotation of the driven gear drives the cam to rotate, and the rotation of the cam drives the plunger to reciprocate, so that the device is simple in structure and convenient to assemble.

Drawings

The application will be described in further detail below in connection with the drawings and the preferred embodiments, but it will be appreciated by those skilled in the art that these drawings are drawn for the purpose of illustrating the preferred embodiments only and thus should not be taken as limiting the scope of the application. Moreover, unless specifically indicated otherwise, the drawings are merely schematic representations, not necessarily to scale, of the compositions or constructions of the described objects and may include exaggerated representations.

FIG. 1 is a schematic diagram of a transmission mechanism of the present disclosure;

FIG. 2 is a cross-sectional view of a transmission of the present disclosure;

FIG. 3 is a schematic illustration of the connection of the planar bearing of the present disclosure to a cam;

FIG. 4 is a cross-sectional view of the planar bearing and cam connection of the present disclosure;

FIG. 5 is a schematic view of the structure of the cam of the present disclosure;

FIG. 6 is a schematic structural view of a planar bearing of the present disclosure;

FIG. 7 is one of the schematic structural views of the driven gear of the present disclosure;

fig. 8 is a second schematic structural view of the driven gear of the present disclosure.

Reference numerals illustrate:

1. A drive gear; 2. a driven gear; 3. a planar bearing; 4. a cam; 5. a drive shaft; 6. a second deep groove ball bearing; 7. a first deep groove ball bearing; 8. a plunger; 21. concave; 22. an annular bump; 23. a connecting shaft; 24. a groove; 25. a limit bump; 31. a first ring member; 32. a second ring member; 33. a ball; 41. a first portion; 42. a second portion; 43. a clamping groove.

Detailed Description

In order to better understand the technical solutions of the present disclosure, the present disclosure will be described in detail, clearly and completely with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present disclosure.

It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present utility model.

Referring to fig. 1, 2 and 3, an embodiment of the disclosure provides a transmission mechanism, which includes a driving gear 1, a driven gear 2 and a cam 4, wherein the driving gear 1 is meshed with the driven gear 2, a driving shaft 5 of a motor is connected with the driving gear 1, the motor drives the driving gear 1 to rotate, and further drives the driven gear 2 to rotate, the cam 4 is of an oblique swash plate structure, the cam 4 is clamped with the driven gear 2, the rotation of the driven gear 2 drives the cam 4 to rotate, and the rotation of the cam 4 drives a plunger 8 to reciprocate.

In order to reduce friction between the plunger 8 and the cam 4, the cam 4 is provided with a first bearing in an interference fit, the first bearing rotates along with rotation of the cam 4, and the rotation of the first bearing drives the plunger 8 to reciprocate. Preferably, the first bearing is a planar bearing 3, and one end of the plunger 8 is in contact with the first bearing.

Referring to fig. 8, in an embodiment of the present disclosure, a first deep groove ball bearing 7 is connected to a side of the driven gear 2 away from the cam 4. Specifically, a connecting shaft 23 is arranged on one side of the driven gear 2, and the first deep groove ball bearing 7 is in interference fit with the connecting shaft 23.

Further, referring to fig. 7 to 8, an indent 21 is provided on one side of the driven gear 2 near the first deep groove ball bearing 7, an annular bump 22 is provided on the indent 21, a connecting shaft 23 is provided on the annular bump 22, the first deep groove ball bearing 7 includes a large ring structure and a small ring structure, the large ring structure is provided outside the small ring structure, and an outer diameter of the annular bump 22 is greater than or equal to an outer diameter of the small ring structure. The provision of the annular projection 22 makes the driven gear 2 more raw material-saving and reduces the processing cost.

It should be noted that, the other side of the driven gear 2 is provided with a groove 24, the inner peripheral wall of the groove 24 is provided with a plurality of limit lugs 25, one side of the cam 4, which is close to the driven gear 2, is provided with a first annular bulge, the first annular bulge is provided with a plurality of clamping grooves 43, the number and positions of the limit lugs 25 and the clamping grooves 43 are corresponding, and the clamping grooves 43 are matched with the limit lugs 25 to connect the cam 4 with the driven gear 2.

In particular, the height of the first annular projection gradually decreases or gradually increases in the radial direction. The cam 4 comprises a first portion 41 and a second portion 42, the first portion 41 and the second portion 42 are integrally formed, the first portion 41 is of an annular structure arranged on the second portion 42, the outer diameter of the annular structure is smaller than that of the first annular protrusion, and the first annular protrusion is arranged on the second portion 42.

Referring to fig. 4 to 6, in an embodiment of the disclosure, the plane bearing 3 includes a first ring member 31, a second ring member 32, and a plurality of balls 33, wherein the plurality of balls 33 are uniformly distributed between the first ring member 31 and the second ring member 32, one side surface of the first ring member 31 is attached to the second portion 42 of the cam 4, the inner diameter of the first ring member 31 is greater than or equal to the outer diameter of the ring structure, and the inner diameter of the second ring member 32 is equal to the outer diameter of the ring structure. Preferably, the inner diameter of the first ring member 31 is larger than the outer diameter of the ring structure, and when the inner diameter of the first ring member 31 is larger than the outer diameter of the ring structure, a gap is formed between the first ring member 31 and the ring structure, so that friction between the flat bearing 3 and the cam 4 can be reduced. Because the plunger 8 contacts with the second annular member 32 and reciprocates under the driving of the second annular member 32, when the inner diameter of the second annular member 32 is larger than the outer diameter of the annular structure, a gap is formed between the second annular member 32 and the annular structure, and the plunger 8 may fall into the gap during the reciprocation, in addition, the second annular member 32 may shake, so that the working stability of the transmission mechanism is affected. When the transmission mechanism works, the cam 4 drives the first ring member 31 to rotate, and the second ring member 32 may or may not rotate.

Preferably, a second deep groove ball bearing 6 is provided on the drive shaft 5 of the motor.

It should be noted that the transmission mechanism in the present disclosure may be used in a plunger 8 pump including a first plunger 8, a second plunger 8, and a plurality of plungers 8.

An embodiment of the disclosure provides a plunger pump, which comprises a cylinder body, wherein the cylinder body is connected with a plunger 8 frame, the plunger 8 frame is provided with a plunger 8, and the transmission mechanism drives the plunger 8 to reciprocate.

The foregoing has outlined rather broadly the more detailed description of the application in order that the detailed description of the application that follows may be better understood, and in order that the present application may be better understood. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the application can be made without departing from the principles of the application and these modifications and adaptations are intended to be within the scope of the application as defined in the following claims.

Claims

1. The utility model provides a drive mechanism, a serial communication port, including driving gear (1), driven gear (2) and cam (4), driving gear (1) and driven gear (2) meshing, drive shaft (5) and driving gear (1) of motor are connected, and the motor drives driving gear (1) and rotates, and then drives the rotation of driven gear (2), cam (4) and driven gear (2) joint, the rotation of driven gear (2) drives cam (4) and rotates, the rotation of cam (4) drives plunger (8) reciprocating motion, cam (4) are slant sloping cam-plate structure.

2. A transmission according to claim 1, characterised in that the cam (4) has a first bearing in interference fit, the first bearing rotating with rotation of the cam (4), the rotation of the first bearing driving the plunger (8) to reciprocate.

3. A transmission according to claim 2, characterized in that the first bearing is a planar bearing (3), with which one end of the plunger (8) is in contact.

4. A transmission according to claim 2, characterized in that the side of the driven gear (2) remote from the cam (4) is connected with a first deep groove ball bearing (7).

5. The transmission mechanism according to claim 4, characterized in that a connecting shaft (23) is arranged on one side of the driven gear (2), and the first deep groove ball bearing (7) is in interference fit with the connecting shaft (23).

6. The transmission mechanism according to claim 5, wherein a concave (21) is provided on a side of the driven gear (2) close to the first deep groove ball bearing (7), an annular bump (22) is provided on the concave (21), a connecting shaft (23) is provided on the annular bump (22), the first deep groove ball bearing (7) comprises a large annular structure and a small annular structure, the large annular structure is provided outside the small annular structure, and an outer diameter of the annular bump (22) is larger than or equal to an outer diameter of the small annular structure.

7. The transmission mechanism according to claim 6, wherein a groove (24) is formed in the other side of the driven gear (2), a plurality of limit protrusions (25) are formed in the inner peripheral wall of the groove (24), a first annular protrusion is formed in one side, close to the driven gear (2), of the cam (4), a plurality of clamping grooves (43) are formed in the first annular protrusion, and the clamping grooves (43) are matched with the limit protrusions (25) to connect the cam (4) with the driven gear (2).

8. The transmission mechanism according to claim 7, wherein a height of the first annular projection is gradually reduced or gradually increased in a radial direction; the cam (4) comprises a first part (41) and a second part (42), the first part (41) and the second part (42) are integrally formed, the first part (41) is of an annular structure arranged on the second part (42), the outer diameter of the annular structure is smaller than that of a first annular bulge, and the first annular bulge is arranged on the second part (42).

9. The transmission mechanism according to claim 8, wherein the planar bearing (3) comprises a first annular member (31), a second annular member (32) and a plurality of balls (33), the balls (33) are uniformly distributed between the first annular member (31) and the second annular member (32), one side surface of the first annular member (31) is attached to the second portion (42) of the cam (4), the inner diameter of the first annular member (31) is equal to or larger than the outer diameter of the annular structure, and the inner diameter of the second annular member (32) is equal to the outer diameter of the annular structure.

10. A plunger pump, characterized by comprising a cylinder body, wherein the cylinder body is connected with a plunger (8) frame, the plunger (8) frame is provided with a plunger (8), and the transmission mechanism according to any one of claims 1-9 drives the plunger (8) to reciprocate.