阅读说明：本技术 一种组合式偏心机构及具有该偏心机构的调量机构 (Combined eccentric mechanism and volume adjusting mechanism with same ) 是由 祝雪金 严东楠 周良 童玥雯 于 2020-12-21 设计创作，主要内容包括：本发明涉及一种组合式偏心机构,第一偏心机构分件和第二偏心机构分件围合拼接形成一个整体,第一偏心机构分件靠近第二偏心机构分件的一侧设有第一通孔,第二偏心机构分件靠近第一偏心机构分件的一侧设有第二通孔,第一通孔和第二通孔围合形成所述偏心机构的内孔,第一偏心机构分件的体积小于第二偏心机构分件的体积,第一偏心机构分件在A-A面的截面积小于第二偏心机构分件在B-B面的截面积。本发明还提出具有上述偏心机构的调量机构。本发明有效提高偏心机构的抗弯截面模量,增加偏心机构的强度和稳定性,进而增加零部件使用寿命,提高泵的使用性能,组合式偏心机构因采用部分分式结构,可分体后安装,再合并,安装更便捷,提高实用性。(The invention relates to a combined eccentric mechanism, wherein a first eccentric mechanism component and a second eccentric mechanism component are enclosed and spliced to form a whole, a first through hole is formed in one side, close to the second eccentric mechanism component, of the first eccentric mechanism component, a second through hole is formed in one side, close to the first eccentric mechanism component, of the second eccentric mechanism component, the first through hole and the second through hole are enclosed to form an inner hole of the eccentric mechanism, the volume of the first eccentric mechanism component is smaller than that of the second eccentric mechanism component, and the sectional area of the first eccentric mechanism component on the A-A surface is smaller than that of the second eccentric mechanism component on the B-B surface. The invention also provides a quantity adjusting mechanism with the eccentric mechanism. The combined eccentric mechanism adopts a partial split structure, can be mounted after being split and then combined, is more convenient and faster to mount, and improves the practicability.)

1. The utility model provides a modular eccentric mechanism, its characterized in that, divides piece and second eccentric mechanism to divide the piece including first eccentric mechanism, first eccentric mechanism divides piece and second eccentric mechanism to divide the piece to enclose to close the concatenation and form a whole, first eccentric mechanism divides one side that the piece is close to second eccentric mechanism to be equipped with first through-hole, one side that second eccentric mechanism divides the piece to be close to first eccentric mechanism divides the piece is equipped with the second through-hole, first through-hole and second through-hole enclose to close and form the hole of eccentric mechanism, the volume that first eccentric mechanism divides the piece is less than the volume that second eccentric mechanism divides the piece, the sectional area of first eccentric mechanism branch piece on A-A face is less than the sectional area of second eccentric mechanism branch piece on B-B face.

2. The modular eccentric mechanism according to claim 1, characterized in that the first eccentric mechanism part and the second eccentric mechanism part are connected by a detachable connecting piece.

3. A combined eccentric according to claim 2, characterized in that the connecting piece is a screw, bolt, pin or rivet.

4. The combined eccentric mechanism according to claim 1, characterized in that the first and second through holes are "U" -shaped through holes.

5. The modular eccentric mechanism according to claim 1, characterized in that the structure of the inner bore is a racetrack structure.

6. A combined eccentric according to claim 1, characterized in that the width of the longitudinal section of the first eccentric section is m2, and the width of the longitudinal section of the second eccentric section is m1, m1 > 1/3m 2.

7. The modular eccentric mechanism according to claim 1, characterized in that the first eccentric mechanism part has a cross-sectional width m4 in the A-A plane and the second eccentric mechanism part has a cross-sectional width m3 in the B-B plane, m4 > 1/2m 3.

8. The quantity adjusting mechanism comprises the combined eccentric mechanism according to any one of claims 1 to 9, and is characterized by further comprising a connecting rod, a bearing, a hollow shaft, a moving shaft, a quantity adjusting screw rod and a sliding block, wherein the connecting rod is arranged on the periphery of the combined eccentric mechanism, the combined eccentric mechanism is movably connected with the hollow shaft and the moving shaft through the sliding block, and the quantity adjusting screw rod is connected with the moving shaft.

Technical Field

The invention relates to the technical field of metering pumps, in particular to a combined eccentric mechanism and a quantity adjusting mechanism with the same.

Background

The metering pump is a fluid device applied to the fields of petrifaction, plastics, food, medicine, environmental protection, sewage treatment and the like, and can adjust the length of a crank in a slider-crank mechanism through an internal eccentric mechanism (part), so that the stroke quantity of a slider (plunger) is controlled, the size of a sealed containing cavity is adjusted, and a check valve is matched for use, so that the delivery and flow regulation of a target medium are realized, and the metering function is completed. Under the influence of the working principle of the metering pump, the acting force of the medium hydraulic on the power end part is in a pulsating mode, and the part is easy to generate fatigue failure when in use. The measures for increasing the strength and stability by increasing the external dimensions of the parts are often limited by the pump structure.

Disclosure of Invention

The invention aims to provide a combined eccentric mechanism and a quantity adjusting mechanism with the same, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a modular eccentric mechanism, divides piece and second eccentric mechanism to divide the piece including first eccentric mechanism, first eccentric mechanism divides piece and second eccentric mechanism to divide the piece to enclose to close the concatenation and form a whole, first eccentric mechanism divides one side that the piece is close to second eccentric mechanism to divide the piece to be equipped with first through-hole, second eccentric mechanism divides one side that the piece is close to first eccentric mechanism to divide the piece to be equipped with the second through-hole, first through-hole and second through-hole enclose to close and form eccentric mechanism's hole, the volume that first eccentric mechanism divides the piece is less than the volume that second eccentric mechanism divides the piece, first eccentric mechanism divides the sectional area of piece on A-A face to be less than the sectional area of second eccentric mechanism branch piece on B-B face.

Preferably, the first eccentric mechanism component and the second eccentric mechanism component are formed by connecting detachable connecting pieces.

Preferably, the connecting member is a screw, bolt, pin or rivet.

Preferably, the first through hole and the second through hole are both U-shaped through holes.

Preferably, the structure of the inner hole is a runway-shaped structure.

Preferably, the first eccentric element has a longitudinal section with a width m2 and the second eccentric element has a longitudinal section with a width m1, m1 > 1/3m 2.

Preferably, the first eccentric mechanism component part has a cross-sectional width of m4 on the A-A surface, and the second eccentric mechanism component part has a cross-sectional width of m3 on the B-B surface, wherein m4 is greater than 1/2m 3.

The invention also provides a quantity adjusting mechanism which comprises the combined eccentric mechanism, and further comprises a connecting rod, a bearing, a hollow shaft, a moving shaft, a quantity adjusting screw rod and a sliding block, wherein the connecting rod is arranged on the periphery of the combined eccentric mechanism, the combined eccentric mechanism is movably connected with the hollow shaft and the moving shaft through the sliding block, and the quantity adjusting screw rod is connected with the moving shaft.

Compared with the prior art, the invention has the beneficial effects that:

1. adopt first eccentric mechanism to divide a piece and second eccentric mechanism to divide a piece to enclose to close the concatenation and form a whole, compare with integral eccentric mechanism, at first combination formula eccentric mechanism when whole size is unchangeable, original "ladle" hole can be optimized to the littleer "runway" type of size, thereby increased A-A, the cross sectional dimension of the weak cross-section of B-B face, improve its bending resistance cross-section modulus, increase eccentric mechanism's intensity and stability, and then increase spare part life, improve the performance of pump, combination formula eccentric mechanism is because of adopting partial branch formula structure, installation after the components and parts can be separated, the reunion, it is more convenient to install, improve the practicality.

2. The detachable connecting piece is connected first eccentric mechanism and is divided piece and second eccentric mechanism and divide the piece, so the installation after the components of a whole that can function independently, and the reunion, the installation is more convenient, and the practicality is stronger.

3. The connecting piece adopts screws, bolts, pins or rivets, so that the first eccentric mechanism part and the second eccentric mechanism part are convenient to detach and mount.

4. The structure of the U-shaped through hole enables the first through hole and the second through hole to be spliced to form a track-shaped structure, so that the section sizes of the weak surfaces of the A-A surface and the B-B surface are increased, and the service life of the pump is prolonged.

5. The arrangement can ensure that the volume of the second eccentric mechanism part is not too small, and the overall strength is not affected.

6. By the arrangement, the second eccentric mechanism sub-component can have enough width in the B-B direction to ensure the strength of the second eccentric mechanism sub-component, the bending resistance section modulus of the second eccentric mechanism sub-component is improved, the strength and the stability of the eccentric mechanism are improved, the service life of parts is prolonged, and the use performance of the pump is improved.

7. When the quantity adjusting mechanism is used, the combined eccentric mechanism is connected with the connecting rod through the bearing, so that the connecting rod can freely swing around the axle center of the combined eccentric mechanism. The combined eccentric mechanism is movably connected with the hollow shaft and the moving shaft through the sliding block, and after the combined eccentric mechanism is applied to a metering pump, the quantity adjusting screw rod is rotated and simultaneously drives the moving shaft to generate axial displacement, so that the eccentric mechanism has different offsets relative to the axis of the hollow shaft, the swing angle amplitude of the connecting rod is driven, and the stroke of the plunger is controlled.

Drawings

FIG. 1 is a schematic structural view of a combined eccentric mechanism according to the present invention;

FIG. 2 is a cross-sectional view of the combined eccentric mechanism of the present invention;

fig. 3 is a schematic structural diagram of a quantity adjusting mechanism with the combined eccentric mechanism of the invention.

In the figure: 1. a first eccentric mechanism component; 2. the second eccentric mechanism is divided into parts; 3. fastening screws; 4. an inner bore; 401. a first through hole; 402. a second through hole; 5. a fixing hole; 6. perforating; 7. a connecting rod; 8. a bearing; 9. a combined eccentric mechanism; 10. a hollow shaft; 11. a movable shaft; 12. quantity-adjusting screw rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 3, in an embodiment of the present invention, a combined eccentric mechanism includes a first eccentric mechanism component 1 and a second eccentric mechanism component 2, where the first eccentric mechanism component 1 and the second eccentric mechanism component 2 are enclosed and spliced to form an integral body, a first through hole 401 is disposed on one side of the first eccentric mechanism component 1 close to the second eccentric mechanism component 2, a second through hole 402 is disposed on one side of the second eccentric mechanism component 2 close to the first eccentric mechanism component 1, the first through hole 401 and the second through hole 402 enclose to form an inner hole 4 of the eccentric mechanism, a volume of the first eccentric mechanism component 1 is smaller than a volume of the second eccentric mechanism component 2, and a cross-sectional area of the first eccentric mechanism component 1 on a-a surface is smaller than a cross-sectional area of the second eccentric mechanism component 2 on B-B surface. Adopt first eccentric mechanism to divide 1 and second eccentric mechanism to divide 2 to enclose to close the concatenation and form a whole, compare with integral eccentric mechanism, at first combination formula eccentric mechanism 9 when whole size is unchangeable, original "ladle" hole 4 can be optimized to the littleer "runway" type of size, thereby A-A has been increased, the cross sectional dimension of the weak cross-section of B-B face, improve its bending resistance cross-section modulus, increase eccentric mechanism's intensity and stability, and then increase spare part life, improve the performance of pump, combination formula eccentric mechanism 9 is because of adopting partial branch formula structure, installation after the components can be separated, the reunion, it is more convenient to install, improve the practicality.

In this embodiment, the first eccentric mechanism component 1 and the second eccentric mechanism component 2 are formed by connecting detachable connecting pieces. The detachable connecting piece is connected first eccentric mechanism and is divided 1 and second eccentric mechanism and divide piece 2, so the installation after the components of a whole that can function independently, and the reunion, the installation is more convenient, and the practicality is stronger.

In this embodiment, the connecting member is a fastening screw, a bolt, a pin, or a rivet. The connecting piece adopts screw, bolt, round pin or rivet, has made things convenient for first eccentric mechanism to divide the dismantlement and the installation of piece 1 and second eccentric mechanism to divide piece 2.

Specifically, in this embodiment, the connecting member is a fastening screw, the first eccentric mechanism is provided with a fixing hole 5 on the sub-member 1, the second eccentric mechanism is provided with a through hole 6 on the sub-member 2, the fastening screw 3 penetrates through the through hole 6 and is fixed in the fixing hole 5 in the first eccentric mechanism sub-member 1, so that the first eccentric mechanism sub-member 1 and the second eccentric mechanism sub-member 2 can be fixed and detached conveniently.

In this embodiment, the first through hole 401 and the second through hole 402 are both "U" shaped through holes. The structure of the U-shaped through hole enables the first through hole 401 and the second through hole 402 to be spliced to form a track-shaped structure, so that the section sizes of the weak surfaces of the A-A surface and the B-B surface are increased, and the service life of the pump is prolonged.

In this embodiment, the inner hole 4 has a racetrack-shaped structure.

In the present exemplary embodiment, the width of the longitudinal section of the first eccentric partial element 1 is m2, and the width of the longitudinal section of the second eccentric partial element 2 is m1, m1 > 1/3m 2. The arrangement can ensure that the volume of the second eccentric mechanism part 2 is not too small, and the overall strength is not affected.

In the present exemplary embodiment, the first eccentric mechanism partial piece 1 has a cross-sectional width m4 in the a-a plane, and the second eccentric mechanism partial piece 2 has a cross-sectional width m3 in the B-B plane, m4 > 1/2m 3. So set up for second eccentric mechanism divides piece 2 can have sufficient width at B-B and guarantees the intensity that second eccentric mechanism divides piece 2, improves its bending resistance section modulus, increases eccentric mechanism's intensity and stability, and then increases spare part life, improves the performance of pump.

The invention also provides a quantity adjusting mechanism, which comprises the combined eccentric mechanism, and further comprises a connecting rod 7, a bearing 8, a hollow shaft 10, a moving shaft 11, a quantity adjusting screw rod 12 and a sliding block, wherein the connecting rod 7 is arranged on the periphery of the combined eccentric mechanism 9, the combined eccentric mechanism 9 is movably connected with the hollow shaft 10 and the moving shaft 11 through the sliding block, and the quantity adjusting screw rod 12 is connected with the moving shaft 11. When the combined type eccentric mechanism is used, the combined type eccentric mechanism 9 is connected with the connecting rod 7 through the bearing 8, so that the connecting rod 7 can freely swing around the axle center of the combined type eccentric mechanism. The combined eccentric mechanism 9 is movably connected with the hollow shaft 10 and the moving shaft 11 through the sliding block, and after the combined eccentric mechanism is applied to a metering pump, the quantity adjusting screw rod 12 is rotated, and the quantity adjusting screw rod 12 is driven to move along the axial direction to the moving shaft 11 while rotating, so that the eccentric mechanism has different offset relative to the axis of the hollow shaft 10, the swing angle amplitude of the connecting rod 7 is driven, and the stroke of the plunger is controlled.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.