CN217501890U - Linear reciprocating mechanism and plunger pump - Google Patents

Abstract

The application discloses straight reciprocating motion mechanism reaches plunger pump including it includes: the front end and the rear end of the shell are respectively provided with a front mounting hole and a rear mounting hole which are communicated with the accommodating space; the sliding component comprises a push rod, a crank and a slide rod which are sequentially connected from front to back, the crank is arranged in the accommodating space, the push rod forwards penetrates through the front mounting hole, the slide rod backwards penetrates through the rear mounting hole, and a driving cavity is arranged in the crank; the limiting sleeve is connected to the rear end of the sliding rod; the spring is sleeved on the part of the sliding rod outside the shell, and two ends of the spring are respectively abutted against the rear end of the limiting sleeve and the front end of the shell; the driving mechanism comprises a driving shaft and an eccentric structure arranged on the periphery of the driving shaft, the driving shaft is rotatably connected to the shell, and the eccentric structure is eccentrically arranged relative to the driving shaft. The high-speed high-load running device can still avoid the phenomena of impact, high noise, high abrasion and the like when running at high speed and high load.

Description

Linear reciprocating mechanism and plunger pump

Technical Field

The application relates to a linear reciprocating mechanism and a plunger pump comprising the same.

Background

In the existing linear reciprocating mechanism, in order to avoid the occurrence of impact and reduce noise and abrasion, an elastic component is usually arranged in a crank, one side of an eccentric structure arranged on a driving shaft is elastically abutted against the elastic component, and the other side of the eccentric structure is always kept abutted against the crank.

SUMMERY OF THE UTILITY MODEL

An object of the present application is to provide a linear reciprocating motion mechanism, which can avoid the phenomena of impact, loud noise, large abrasion and the like when moving at high speed and high load. It is another object of the present application to provide a plunger pump including the above-described linear reciprocating mechanism.

The purpose of the application is realized by the following technical scheme:

a linear reciprocating mechanism, comprising:

the shell is internally provided with an accommodating space, and the front end and the rear end of the shell are respectively provided with a front mounting hole and a rear mounting hole which are communicated with the accommodating space;

the sliding component comprises a push rod, a crank and a slide rod which are sequentially connected from front to back, the crank is arranged in the accommodating space, the push rod forwards penetrates through the front mounting hole, the slide rod backwards penetrates through the rear mounting hole, and a driving cavity is arranged in the crank;

the limiting sleeve is connected to the rear end of the sliding rod;

the spring is sleeved on the part of the sliding rod, which is positioned outside the shell, and two ends of the spring are respectively abutted against the front end of the limiting sleeve and the rear end of the shell; and

the driving mechanism is arranged in the driving cavity and comprises a driving shaft and an eccentric structure, the driving shaft is rotationally connected with the shell, the eccentric structure is arranged on the periphery of the driving shaft, and the eccentric structure is eccentrically arranged relative to the central axis of the driving shaft;

the driving shaft rotates around the central axis of the driving shaft to drive the eccentric structure to rotate, and then the sliding component is pushed to linearly reciprocate in the front-back direction.

In some embodiments of the present application, a limiting assembly is disposed between the housing and the sliding member, and the limiting assembly can prevent the sliding member from rotating relative to the housing.

In some embodiments of the present application, the stop assembly comprises:

the limiting groove is formed in the outer peripheral wall of the sliding rod and extends along the axial direction of the sliding rod; and

the limiting screw is arranged at the rear end of the shell, and the tail end of the limiting screw is inserted into the limiting groove in a matched mode.

In some embodiments of the present application, the limiting assembly comprises:

the first sliding groove is formed in the outer peripheral wall of the sliding rod and extends in the axial direction of the sliding rod;

the second sliding groove is formed in the inner wall surface of the rear mounting hole and is arranged opposite to the first sliding groove, and the second sliding groove extends along the axial direction of the rear mounting hole; and

the ball, the ball is located respectively in first spout and the second spout.

In some embodiments of the present application, the stop collar includes a nut member screwed to the slide bar.

In some embodiments of this application, eccentric structure includes eccentric portion and antifriction bearing, eccentric portion integrated into one piece in the drive shaft periphery, eccentric portion for the central axis of drive shaft is eccentric settings, the antifriction bearing cover is located the eccentric portion periphery.

In some embodiments of the present application, a sliding bearing is disposed in the front mounting hole, and the push rod is disposed in the sliding bearing in a penetrating manner.

In some embodiments of the present application, the front end surface of the crank is sequentially provided with a positioning hole and an internal threaded hole from front to back;

the rear end of the push rod comprises an engaging part, a positioning part and an abutting part which are sequentially connected from back to front, the engaging part is in threaded connection with the internal threaded hole, the positioning hole is inserted in the positioning hole in a matched mode, and the front end face of the abutting part is abutted to the rear end face of the crank in a matched mode.

In some embodiments of the present application, the first and second,

at least two eccentric structures are axially arranged on the driving shaft at intervals, and the central axes of any two eccentric structures are not overlapped;

the shell is provided with at least two pairs of front mounting holes and rear mounting holes, the number of which is the same as that of the eccentric structures;

the linear reciprocating mechanism comprises at least two sliding parts, a limiting sleeve and a spring, wherein the number of the sliding parts is the same as that of the eccentric structures.

A plunger pump comprising the linear reciprocating mechanism of any one of the above.

According to the linear reciprocating motion mechanism and the plunger pump, when the rotational kinetic energy is converted into the linear reciprocating motion, the outer peripheral wall of the eccentric structure can be attached to the inner wall surface of the driving cavity of the crank in the whole process under the damping action of the spring connected between the limiting sleeve and the rear end of the shell, so that the impact can be effectively avoided, the noise and the abrasion are reduced, and the transmission reliability is improved; moreover, because the spring is arranged outside the shell and sleeved outside the sliding rod, the structural size of the spring is not limited by the internal structure of the sliding part, and large elastic force can be provided, so that the functional requirements can be still met under the working conditions of high speed and high load.

Drawings

The present application is described in further detail below in connection with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of explaining the preferred embodiments, and therefore should not be taken as limiting the scope of the present application. Furthermore, unless specifically stated otherwise, the drawings are intended to be conceptual in nature or configuration of the described objects and may contain exaggerated displays and are not necessarily drawn to scale.

FIG. 1 is a schematic cross-sectional view of a linear reciprocating mechanism according to an embodiment of the present application;

FIG. 2 is an enlarged view of part B of FIG. 1;

FIG. 3 is a schematic sectional view taken along line A-A of FIG. 1;

FIG. 4 is a schematic view showing the structure of a sliding member of the linear reciprocating mechanism of FIG. 1;

FIG. 5 is an enlarged partial view of portion C of FIG. 4;

FIG. 6 is a schematic sectional view of a linear reciprocating mechanism according to a second embodiment of the present application;

FIG. 7 is an enlarged schematic view of a portion D of FIG. 6;

fig. 8 is a schematic sectional view showing a linear reciprocating mechanism according to a third embodiment of the present application.

In the figure, 1, a housing; 11. a front mounting hole; 12. a rear mounting hole; 13. a housing; 131. an upper half shell; 132. a lower half shell; 14. a tail plate; 2. a sliding member; 21. a push rod; 211. an engaging portion; 212. a positioning part; 213. an abutting portion; 22. a crank; 221. a drive chamber; 222. positioning holes; 223. an internally threaded bore; 23. a slide bar; 3. a limiting sleeve; 31. a nut member; 4. a spring; 10. a drive mechanism; 5. a drive shaft; 6. an eccentric structure; 61. an eccentric portion; 62. a rolling bearing; 7. a limiting component; 71. a limiting groove; 72. a limit screw; 73. a first chute; 74. a second chute; 75. a ball bearing; 8. a bearing; 9. a sliding bearing.

Detailed Description

Hereinafter, preferred embodiments of the present application will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the descriptions are illustrative only, exemplary, and should not be construed as limiting the scope of the application.

First, it should be noted that the orientations of top, bottom, upward, downward, and the like referred to herein are defined with respect to the orientation in the respective drawings, are relative concepts, and thus can be changed according to different positions and different practical states in which they are located. In addition, in this application, the end close to the power take-off is "front" and the end away from the power take-off is "rear". These and other orientations, therefore, should not be used in a limiting sense.

It should be noted that the term "comprising" does not exclude other elements or steps and the "a" or "an" does not exclude a plurality.

Furthermore, it should be further noted that any single technical feature described or implied in the embodiments herein, or any single technical feature shown or implied in the figures, can still be combined between these technical features (or their equivalents) to obtain other embodiments of the present application not directly mentioned herein.

It will be further understood that the terms "first," "second," and the like, are used herein to describe various information and should not be limited to these terms, which are used merely to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present application.

It should be noted that in different drawings, the same reference numerals indicate the same or substantially the same components.

The embodiment of the first aspect of the present application provides a linear reciprocating motion mechanism, and the specific implementation manner is as follows:

example one

As shown in fig. 1 to 5, the linear reciprocating mechanism of the present embodiment includes: the device comprises a shell 1, a sliding part 2, a limiting sleeve 3, a spring 4 and a driving mechanism 10.

The shell 1 is internally provided with an accommodating space, the front end and the rear end of the shell 1 are respectively provided with a front mounting hole 11 and a rear mounting hole 12 which are communicated with the accommodating space, the sliding component 2 comprises a push rod 21, a crank 22 and a sliding rod 23 which are sequentially connected from front to back, the crank 22 is arranged in the accommodating space, the push rod 21 forwards passes through the front mounting hole 11, the sliding rod 23 backwards passes through the rear mounting hole 12, the crank 22 is internally provided with a driving cavity 221, the limiting sleeve 3 is connected with the rear end of the sliding rod 23, the spring 4 is sleeved on the part of the sliding rod 23 which is positioned outside the shell 1, and two ends of the spring 4 are respectively abutted against the front end of the limiting sleeve 3 and the rear end of the shell 1, the driving mechanism 10 is arranged in the driving cavity 221, the driving mechanism 10 comprises a driving shaft 5 and an eccentric structure 6 arranged outside the driving shaft 5, the driving shaft 5 extends along the up-and-down direction, and is rotatably connected to the housing 1, the eccentric structure 6 is arranged on the periphery of the driving shaft 5, and the eccentric structure 6 is eccentrically arranged relative to the central axis of the driving shaft 5.

Wherein, drive shaft 5 rotates around its central axis and can take eccentric structure 6 to rotate, and because eccentric structure 6 is eccentric settings with drive shaft 5, and then the periphery wall of eccentric structure 6 promotes the internal perisporium of drive chamber 221 of crank 22, finally makes the whole linear reciprocating motion along the fore-and-aft direction of sliding part 2.

Based on the technical scheme, when the linear reciprocating motion mechanism converts the rotational kinetic energy into the reciprocating motion, the outer peripheral wall of the eccentric structure 6 can be attached to the inner wall surface of the driving cavity 221 of the crank 22 in the whole process under the damping action of the spring 4 connected between the limiting sleeve 3 and the rear end of the shell 1, so that the impact can be effectively avoided, the noise and the abrasion are reduced, and the transmission reliability is improved; moreover, in the embodiment, since the spring 4 is disposed outside the housing 1 and sleeved outside the sliding rod 23, the structural size of the spring 4 is not limited by the internal structure of the sliding part 2, so that the range of the elastic force provided by the spring 4 is not limited any more, the device can still ensure that the eccentric structure 6 is tightly attached to the crank 22 when operating at high speed and high load, and the separation phenomenon caused by high speed and high load is avoided, i.e., the functional requirements can still be met under the working conditions of high speed and high load.

Further, in the present embodiment, a limiting component 7 is disposed between the housing 1 and the sliding component 2, and the limiting component 7 can prevent the sliding component 2 from rotating relative to the housing 1; because the sliding component 2 can not rotate in the reciprocating linear motion process, the mutual interference between the components is avoided, the friction and even the impact are avoided, the use reliability is ensured, and the service life is prolonged.

Specifically, referring to fig. 2, the limiting component 7 in this embodiment includes: the limiting groove 71 and the limiting screw 72 are arranged on the outer peripheral wall of the sliding rod 23, the limiting groove 71 extends along the axial direction of the sliding rod 23, the limiting screw 72 is arranged at the rear end of the shell 1, and the tail end of the limiting screw 72 is inserted into the limiting groove 71 in a matched manner; the limit screw 72 is connected to the rear end of the housing 1, and the end of the limit screw 72 is inserted into the limit groove 71, so that the sliding member 2 can be prevented from rotating relative to the housing 1 by limiting between the end of the limit screw 72 and the limit groove 71 in the process of linear reciprocating motion of the sliding member 2.

Further, as shown in fig. 2, the limiting sleeve 3 includes a nut member 31 screwed on the sliding rod 23, the nut member 31 is detachably connected to the sliding rod 23, when assembling, the spring 4 is firstly sleeved outside the sliding rod 23, and then the nut member 31 is connected, and the magnitude of the resilient force of the spring 4 can be adjusted by adjusting the front and rear positions of the nut member 31.

Illustratively, two nut members 31 may be axially arranged from front to back, and the nut member 31 at the back end can effectively prevent the nut member 31 at the front end from backing.

In addition, in the embodiment, in order to reduce the friction resistance between the eccentric structure 6 and the crank 22 during the movement and facilitate the manufacturing and assembling, the eccentric structure 6 includes an eccentric portion 61 and a rolling bearing 62, the eccentric portion 61 is integrally formed on the outer periphery of the driving shaft 5, the eccentric portion 61 is eccentrically disposed with respect to the central axis of the driving shaft 5, and the rolling bearing 62 is fitted on the outer periphery of the eccentric portion 61.

As an alternative, the rolling bearing 62 may be omitted, that is, the eccentric structure 6 only includes the eccentric portion 61 integrally formed on the driving shaft 5 and eccentrically disposed with respect to the central axis of the driving shaft 5, the driving shaft 5 and the eccentric portion 61 form a crankshaft structure, and when the driving shaft rotates, the eccentric portion 61 is in fit abutment with the inner wall of the driving cavity 221 in the crank 22 to push the sliding component 2 to linearly reciprocate in the front-rear direction.

Similarly, in order to reduce the friction between the sliding member 2 and the housing 1 during the sliding process, the sliding bearing 9 is provided in the front mounting hole 11, and the push rod 21 is inserted into the sliding bearing 9.

As shown in fig. 5, in the embodiment of the present application, in order to meet the requirement of high load, the connection manner of the push rod 21 and the crank 22 is optimized, specifically: the front end face of the crank 22 is provided with a positioning hole 222 and an internal thread hole 223 in sequence from front to back, the rear end of the push rod 21 comprises an engaging part 211, a positioning part 212 and an abutting part 213 which are connected in sequence from back to front, the engaging part 211 is in threaded connection with the internal thread hole 223, the positioning hole 222 is inserted into the positioning hole 222 in a matched mode, and the rear end face of the abutting part 213 is in abutted fit with the front end face of the crank 22. Through the three-section type connection mode, firstly, the rear end face of the abutting portion 213 is abutted to the front end face of the crank 22 in a matching manner, so that deformation at the joint during high-load movement can be avoided, the positioning portion 212 is matched with the positioning hole 222, so that the positioning of the push rod 21 relative to the crank 22 can be more precise and accurate, and the threaded connection ensures firm and reliable connection.

Illustratively, for ease of assembly, the housing 1 in the present embodiment includes: the shell 13 is hollow with an opening at the rear part, the tail plate 14 is connected to the opening of the shell 13, the front mounting hole 11 is arranged at the front end position of the shell 13, and the rear mounting hole 12 is arranged on the tail plate 14.

Further, the housing 13 includes an upper half shell 131 and a lower half shell 132 which are covered with each other up and down, the upper end of the driving shaft 5 is rotatably connected to the upper half shell 131 through a bearing 8, the lower end of the driving shaft 5 penetrates through the lower half shell 132 from top to bottom, and the lower end of the driving shaft 5 is also rotatably connected to the lower half shell 132 through the bearing 8.

Example two

As shown in fig. 6 and 7, the linear reciprocating mechanism of the present embodiment is different from the embodiments only in that:

the spacing subassembly 7 in this embodiment includes: the slide rod 23 includes a first slide groove 73, a second slide groove 74, and balls 75, the first slide groove 73 is provided on the outer peripheral wall of the slide rod 23 and extends in the axial direction of the slide rod 23, the second slide groove 74 is provided on the inner wall surface of the rear mounting hole 12 and is provided opposite to the first slide groove 73, the second slide groove 74 extends in the axial direction of the rear mounting hole 12, and the balls 75 are provided in the first slide groove 73 and the second slide groove 74, respectively. In the present embodiment, the first slide groove 73 and the second slide groove 74 are formed in the outer peripheral wall of the slide rod 23 and the inner wall surface of the rear mounting hole 12, respectively, and the spherical balls 75 are provided in the first slide groove 73 and the second slide groove 74, respectively, so that the slide member 2 can be prevented from rotating relative to the housing 1 during operation.

EXAMPLE III

As shown in fig. 8, the straight reciprocating mechanism in the present embodiment is different from the first and second embodiments only in that:

at least two eccentric structures 6 are axially arranged on a driving shaft 5 of the linear reciprocating mechanism at intervals, and the central axes of any two eccentric structures 6 are not overlapped; the shell 1 is provided with at least two pairs of front mounting holes 11 and back mounting holes 12 which are the same as the eccentric structures 6 in number; the linear reciprocating mechanism comprises at least two sliding parts 2, a limiting sleeve 3 and a spring 4, wherein the number of the sliding parts is the same as that of the eccentric structures 6. An embodiment of a second aspect of the present application proposes a plunger pump comprising a linear reciprocating mechanism as in any of the embodiments of the first aspect.

With this linear reciprocating mechanism, when the drive shaft 5 rotates, linear reciprocating motions can be output from different push rods 21, respectively.

In summary, when the linear reciprocating motion of the embodiment of the present application converts the rotational kinetic energy into the linear reciprocating motion, the outer peripheral wall of the eccentric structure 6 can be kept attached to the inner wall surface of the driving cavity 221 of the crank 22 in the whole process by the damping action of the spring 4 connected between the limiting sleeve 3 and the rear end of the housing 1, so that the occurrence of impact can be effectively avoided, noise and abrasion can be reduced, and the reliability of transmission can be improved; moreover, because the spring 4 is arranged outside the shell 1 and sleeved outside the sliding rod 23, the structural size of the spring 4 is not limited by the internal structure of the sliding part 2, and large elastic force can be provided, so that the functional requirements can be met under the working conditions of high speed and high load.

A second aspect of the embodiments of the present application also proposes a plunger pump including the linear reciprocating mechanism of any of the embodiments described above.

The linear reciprocating mechanism has all the beneficial effects of the linear reciprocating mechanism, and the description is omitted here.

This written description discloses the application with reference to the drawings, and also enables one skilled in the art to practice the application, including making and using any devices or systems, using suitable materials, and using any incorporated methods. The scope of the present application is defined by the claims and includes other examples that occur to those skilled in the art. Such other examples are to be considered within the scope of the claims as long as they include structural elements that do not differ from the literal language of the claims, or that they include equivalent structural elements with insubstantial differences from the literal language of the claims.

Claims (10)

1. A linear reciprocating motion mechanism, comprising:

the shell is internally provided with an accommodating space, and the front end and the rear end of the shell are respectively provided with a front mounting hole and a rear mounting hole which are communicated with the accommodating space;

the sliding component comprises a push rod, a crank and a slide rod which are sequentially connected from front to back, the crank is arranged in the accommodating space, the push rod forwards penetrates through the front mounting hole, the slide rod backwards penetrates through the rear mounting hole, and a driving cavity is arranged in the crank;

the limiting sleeve is connected to the rear end of the sliding rod;

the spring is sleeved on the part of the sliding rod, which is positioned outside the shell, and two ends of the spring are respectively abutted against the front end of the limiting sleeve and the rear end of the shell; and

the driving mechanism is arranged in the driving cavity and comprises a driving shaft and an eccentric structure, the driving shaft is rotationally connected with the shell, the eccentric structure is arranged on the periphery of the driving shaft, and the eccentric structure is eccentrically arranged relative to the central axis of the driving shaft;

the driving shaft rotates around the central axis of the driving shaft to drive the eccentric structure to rotate, and then the sliding component is pushed to linearly reciprocate in the front-back direction.

2. The linear reciprocating mechanism of claim 1, wherein a stop assembly is disposed between the housing and the sliding member, the stop assembly being capable of preventing rotation of the sliding member relative to the housing.

3. The linear reciprocating mechanism of claim 2, wherein the limit stop assembly comprises:

the limiting groove is formed in the outer peripheral wall of the sliding rod and extends along the axial direction of the sliding rod; and

the limiting screw is arranged at the rear end of the shell, and the tail end of the limiting screw is inserted into the limiting groove in a matched mode.

4. The linear reciprocating mechanism of claim 2, wherein the limit stop assembly comprises:

the first sliding groove is formed in the outer peripheral wall of the sliding rod and extends in the axial direction of the sliding rod;

the second sliding groove is formed in the inner wall surface of the rear mounting hole and is arranged opposite to the first sliding groove, and the second sliding groove extends along the axial direction of the rear mounting hole; and

the ball, the ball is located respectively in first spout and the second spout.

5. The linear reciprocating mechanism according to claim 1, wherein the stopper sleeve includes a nut member screwed to the slide rod.

6. The mechanism of claim 1, wherein the eccentric structure comprises an eccentric portion and a rolling bearing, the eccentric portion is integrally formed on the outer periphery of the driving shaft, the eccentric portion is eccentrically disposed with respect to the central axis of the driving shaft, and the rolling bearing is sleeved on the outer periphery of the eccentric portion.

7. The mechanism of claim 1, wherein a sliding bearing is disposed in the front mounting hole, and the push rod is inserted into the sliding bearing.

8. The mechanism of claim 1, wherein the front end face of the crank is provided with a positioning hole and an internal thread hole in sequence from front to back;

the rear end of the push rod comprises an engaging part, a positioning part and an abutting part which are sequentially connected from back to front, the engaging part is in threaded connection with the internal threaded hole, the positioning hole is inserted in the positioning hole in a matched mode, and the front end face of the abutting part is abutted to the rear end face of the crank in a matched mode.

9. The mechanism according to any one of claims 1 to 8, wherein at least two eccentric structures are provided on the driving shaft at intervals in the axial direction, and the central axes of any two eccentric structures do not coincide;

the shell is provided with at least two pairs of front mounting holes and rear mounting holes, the number of which is the same as that of the eccentric structures;

the linear reciprocating mechanism comprises at least two sliding parts, a limiting sleeve and a spring, wherein the number of the sliding parts is the same as that of the eccentric structures.

10. A plunger pump characterized by comprising the linear reciprocating mechanism according to any one of claims 1 to 9.

Images