阅读说明：本技术 轴向承载装置及其应用的立式旋转偏心隔膜泵 (Axial bearing device and vertical rotary eccentric diaphragm pump using same ) 是由 颜宏 于 2020-06-08 设计创作，主要内容包括：本发明公开了轴向承载装置,设置在隔膜泵的电机和偏心轮之间,包括耐磨垫片和滚珠,在电机的前端含油轴承表面套装设置耐磨垫片,在偏心轮的下底面设置轨道槽,在轨道槽中安装若干滚珠,滚珠的上部与轨道槽接触,滚珠的下部与耐磨垫片的上表面接触。还公开了相应的立式旋转偏心隔膜泵。本发明既能承受轴向负载力,又能降低噪音,降低温升,以及降低成本。(The invention discloses an axial bearing device which is arranged between a motor and an eccentric wheel of a diaphragm pump and comprises a wear-resistant gasket and balls, wherein the wear-resistant gasket is sleeved on the surface of an oil-containing bearing at the front end of the motor, a track groove is formed in the lower bottom surface of the eccentric wheel, the balls are arranged in the track groove, the upper parts of the balls are in contact with the track groove, and the lower parts of the balls are in contact with the upper surface of the wear-resistant gasket. A corresponding vertical rotary eccentric diaphragm pump is also disclosed. The invention can bear axial load force, reduce noise, reduce temperature rise and reduce cost.)

1. Axial load-bearing device, its characterized in that: the anti-wear pump is arranged between a motor and an eccentric wheel of the diaphragm pump and comprises a wear-resistant gasket and balls, wherein the wear-resistant gasket is sleeved on the surface of an oil bearing at the front end of the motor, a track groove is formed in the lower bottom surface of the eccentric wheel, a plurality of balls are arranged in the track groove, the upper portions of the balls are in contact with the track groove, and the lower portions of the balls are in contact with the upper surface of the wear-resistant gasket.

2. The axial load bearing device of claim 1, wherein: the track grooves are a plurality of independent counter bore grooves which are uniformly distributed in the circumferential direction of the lower bottom surface of the eccentric wheel, and the balls are installed in the counter bore grooves one by one.

3. The axial load bearing device of claim 1, wherein: the track groove is an annular groove, a retainer is arranged between the lower bottom surface of the eccentric wheel and the wear-resistant gasket, a plurality of positioning holes are formed in the retainer, the balls are sleeved in the positioning holes of the retainer one by one, and the upper portions of the balls are arranged in the annular groove.

4. The axial load bearing device of claim 1, wherein: lubricating oil is injected into the track groove of the eccentric wheel, the ball is installed in the track groove by means of the viscosity of the lubricating oil, and the ball is exposed out of the end face of the opening of the track groove by more than 0.1 mm.

5. The axial load bearing device of claim 1, wherein: the wear-resistant gasket is in the shape of a sheet body with a central round hole and a circular outer edge, the central round hole is in clearance fit with the motor shaft, and the outer diameter size of the wear-resistant gasket is larger than the effective area range of the ball motion area, so that the upper side of the ball is in contact with the bottom surface of the track groove of the eccentric wheel, and the lower side of the wear-resistant gasket is in contact with the wear-resistant gasket.

6. The axial load bearing device of claim 1, wherein: the material of the ball is stainless steel; the wear-resistant gasket is made of graphite nylon or PEEK.

7. Vertical rotatory eccentric diaphragm pump, its characterized in that: a motor with powder metallurgy oil-retaining bearings at the front and the rear is adopted, an eccentric wheel is sleeved on a motor shaft, and an axial bearing device as claimed in any one of claims 1 to 6 is arranged between the motor and the eccentric wheel.

8. The vertical rotary eccentric diaphragm pump of claim 7, wherein: the diaphragm pump air bag is characterized in that the eccentric wheel is provided with a central hole, a motor shaft is connected in the central hole, an eccentric hole is formed in one side of the eccentric wheel, the lower end of a driving shaft of the diaphragm pump air bag is inserted into the eccentric hole, a counterweight groove is formed in the other side of the eccentric wheel, and a counterweight steel ball is fixedly installed in the counterweight groove.

9. The vertical rotary eccentric diaphragm pump of claim 8, wherein: the groove wall of the counterweight groove is provided with a sectional groove along the axial direction, and the groove wall of the counterweight groove has elasticity.

10. The vertical rotary eccentric diaphragm pump of claim 8, wherein: the center of the eccentric hole and the center of the counterweight groove are positioned on the same diameter of the eccentric wheel.

Technical Field

The invention relates to the technical field of diaphragm pumps, in particular to an axial bearing device and a vertical rotating eccentric diaphragm pump applying the axial bearing device.

Background

In the application of the vertical rotary eccentric diaphragm pump, in particular to an inflator pump for a waist support and massage system in the automobile seat industry, an inflator pump for an atomizer and an oxygenerator in the medical industry and other occasions with heavy load, large flow and long service life, a micro motor of a ball bearing can be selected as a power driving part. Take ball bearing's motor, on the one hand the price ratio is higher, and on the other hand receives the structure size restriction, selects the ball bearing model size too little, and this ball bearing's life-span is difficult to obtain guaranteeing, and ball bearing is general noise big moreover, and the temperature rise during long-time continuous operation, too high temperature rise still leads to eccentric wheel deformation or even local melting inefficacy. In order to solve these problems, it is necessary to develop a structure capable of bearing the axial load force, reducing noise, temperature rise, and cost.

Disclosure of Invention

The invention aims to provide an axial bearing device and a vertical type rotary eccentric diaphragm pump applying the axial bearing device, which can bear axial load force, reduce noise, reduce temperature rise and reduce cost.

In order to achieve the above purpose, the solution of the invention is:

the axial bearing device is arranged between a motor and an eccentric wheel of the diaphragm pump and comprises a wear-resistant gasket and balls, the surface of an oil bearing at the front end of the motor is sleeved with the wear-resistant gasket, a track groove is formed in the lower bottom surface of the eccentric wheel, a plurality of balls are arranged in the track groove, the upper portion of each ball is in contact with the track groove, and the lower portion of each ball is in contact with the upper surface of the corresponding wear-resistant gasket.

The track grooves are a plurality of independent counter bore grooves which are uniformly distributed in the circumferential direction of the lower bottom surface of the eccentric wheel, and the balls are installed in the counter bore grooves one by one.

The track groove is an annular groove, a retainer is arranged between the lower bottom surface of the eccentric wheel and the wear-resistant gasket, a plurality of positioning holes are formed in the retainer, the balls are sleeved in the positioning holes of the retainer one by one, and the upper portions of the balls are arranged in the annular groove.

Lubricating oil is injected into the track groove of the eccentric wheel, the ball is installed in the track groove by means of the viscosity of the lubricating oil, and the ball is exposed out of the end face of the opening of the track groove by more than 0.1 mm.

The wear-resistant gasket is in the shape of a sheet body with a central round hole and a circular outer edge, the central round hole is in clearance fit with the motor shaft, and the outer diameter size of the wear-resistant gasket is larger than the effective area range of the ball motion area, so that the upper side of the ball is in contact with the bottom surface of the track groove of the eccentric wheel, and the lower side of the wear-resistant gasket is in contact with the wear-resistant gasket.

The material of the ball is stainless steel; the wear-resistant gasket is made of graphite nylon, PEEK and the like.

A vertical rotary eccentric diaphragm pump adopts a motor with powder metallurgy oil-containing bearings at the front and the rear, an eccentric wheel is sleeved on a motor shaft, and the axial bearing device is arranged between the motor and the eccentric wheel.

The diaphragm pump air bag is characterized in that the eccentric wheel is provided with a central hole, a motor shaft is connected in the central hole, an eccentric hole is formed in one side of the eccentric wheel, the lower end of a driving shaft of the diaphragm pump air bag is inserted into the eccentric hole, a counterweight groove is formed in the other side of the eccentric wheel, and a counterweight steel ball is fixedly installed in the counterweight groove.

The groove wall of the counterweight groove is provided with a sectional groove along the axial direction, and the groove wall of the counterweight groove has elasticity.

The center of the eccentric hole and the center of the counterweight groove are positioned on the same diameter of the eccentric wheel.

After the scheme is adopted, the working principle of the air pump is that when the motor rotates, the motor shaft drives the eccentric wheel to rotate, the ball rotates along with the eccentric wheel in the track groove and rolls and slides and rubs with the wear-resistant gasket, the axial load of the air pump under the action of the inflating load is transmitted to the ball through the eccentric wheel, is transmitted to the wear-resistant gasket through the ball and is finally borne by the oil-containing bearing of the motor. The material of the ball can be stainless steel, the eccentric wheel contacted with the ball is made of self-lubricating plastic with low friction coefficient, the wear-resistant gasket contacted with the ball can be made of wear-resistant plastic, and the plastic and metal move mutually. The temperature rise is reduced, the service life of the eccentric wheel made of plastic materials is prolonged, and meanwhile, the component cost of the motor structure is far lower than that of a motor structure using a ball bearing in the prior art. Therefore, the invention can bear axial load force, reduce noise, reduce temperature rise and reduce cost.

The invention is described in further detail below with reference to the figures and the embodiments.

Drawings

FIG. 1 is an exploded top plan view of the axial load bearing device of the present invention;

FIG. 2 is an exploded bottom view of the axial load bearing device of the present invention;

FIG. 3 is an exploded side view of the axial load bearing device of the present invention;

FIG. 4 is an exploded top view of the vertical rotary eccentric diaphragm pump of the present invention;

FIG. 5 is an exploded bottom view of the vertical rotary eccentric diaphragm pump of the present invention;

FIG. 6 is a combined cross-sectional view of a vertical rotary eccentric diaphragm pump of the present invention;

FIG. 7 is a bottom view of the eccentric;

FIG. 8 is a top view of the eccentric;

FIG. 9 is a cross-sectional view of an eccentric;

FIG. 10 is an exploded bottom view of another embodiment of the axial load bearing device of the present invention.

Description of the reference symbols

The device comprises a motor 1, an oil-retaining bearing 11 and a motor shaft 12;

the eccentric wheel 2, the track groove 21, the eccentric hole 22, the counterweight groove 23, the cutting groove 231, the counterweight steel ball 24 and the central hole 25;

a wear pad 3, a central circular hole 31;

a ball 4;

the holder 5, the positioning hole 51;

a base 6;

a support frame 7, a drive shaft 71;

the airbag seat 8, the bell-shaped airbag 81, the boss 82;

upper cover 9, check valve diaphragm 91, diaphragm seat 92.

Detailed Description

Referring to fig. 1 to 10, the axial bearing device disclosed by the invention is arranged between a motor 1 and an eccentric wheel 2 of a diaphragm pump, and comprises a wear-resistant gasket 3 and a ball 4. A wear-resistant gasket 3 is sleeved on the surface of an oil-retaining bearing 11 at the front end of a motor 1, a track groove 21 is arranged on the lower bottom surface of an eccentric wheel 2, a plurality of balls 4 are arranged in the track groove 21, lubricating oil can be injected into the track groove 21 of the eccentric wheel 2 during assembly, the balls 4 are arranged in the track groove 21 by means of the viscosity of the lubricating oil, the upper parts of the balls 4 are in contact with the track groove 21, the optimal design is that the balls 4 are exposed out of the end surface of the opening part of the track groove 21 by more than 0.1mm, and the lower parts of the balls 4 are in contact with the.

In the embodiment shown in fig. 1-9, the track grooves 21 are a plurality of independent counter bore grooves which are uniformly distributed in the circumferential direction of the lower bottom surface of the eccentric wheel 2, and the balls 4 are arranged in the counter bore grooves one by one. In the embodiment shown in fig. 10, the track groove 21 is an annular groove, the retainer 5 is further arranged between the lower bottom surface of the eccentric wheel 2 and the wear-resistant gasket 3, the retainer 5 is provided with a plurality of positioning holes 51, the balls 4 are sequentially sleeved in the positioning holes 51 of the retainer 5, and the upper parts of the balls 5 are arranged in the annular groove, so that the retainer 5 isolates the balls 4 to prevent the balls 4 from moving and rubbing each other.

In the preferred embodiment of the present invention, as shown in the drawings but not limited to the structure shown in the drawings, the wear-resistant pad 3 is shaped as a plate with a circular central hole 31 and a circular outer periphery, the circular central hole 31 is in clearance fit with the motor shaft 12, and the outer diameter is larger than the effective area of the moving area of the ball 4, so as to ensure that the upper side of the ball 4 contacts the bottom surface of the track groove 21 of the eccentric wheel 2 and the lower side contacts the wear-resistant pad 3.

The material of the ball 4 is preferably stainless steel; the material of the wear-resistant pad 3 is preferably graphite nylon, PEEK, or the like.

The axial bearing device of the invention is applied to a vertical type rotary eccentric diaphragm pump, as shown in figures 4-6, the improvement points of the invention are as follows: the air pump adopts the motor 1 with the powder metallurgy oil-retaining bearing 11 at the front and the back, the motor 1 with the powder metallurgy oil-retaining bearing 11 is the existing product on the market, the eccentric wheel 2 is sleeved on the motor shaft 12, and the axial bearing device is arranged between the motor 1 and the eccentric wheel 2. The structure of the vertical rotary eccentric diaphragm pump can be as shown in the figure but not limited to the structure shown in the figure, and is composed of an upper cover 9, a check valve diaphragm 91, a diaphragm seat 92, a bell-shaped air bag 81, an air bag seat 8, a shaft sleeve 82, a support frame 7, a stainless steel driving shaft 71, a base 6, an eccentric wheel 2 and a motor 1. Wherein the motor 1 is mounted on the base 6. The base 6 is sequentially provided with an air bag seat 8, a diaphragm seat 92 and an upper cover 9. The motor 1 is transmitted to the eccentric wheel 2, the eccentric wheel 2 is transmitted to the stainless steel driving shaft 71, and the stainless steel driving shaft 71 and the supporting frame 7 are integrated by injection molding. A bell-shaped air bag 81 and a boss 82 are mounted on the air bag seat 8, the lower end of the bell-shaped air bag 81 is attached to the support frame 7, and the upper end of the stainless steel drive shaft 71 is inserted in the boss 82. The check valve diaphragm 91 is mounted on the diaphragm seat 92. The bell-shaped bladder 81 reciprocates and pumps gas out of the upper cover 9 through the check valve diaphragm 91 to effect inflation.

The working principle of the vertical rotating eccentric diaphragm pump is that when the motor 1 rotates, the motor shaft 12 drives the eccentric wheel 2 to rotate, the ball 4 rotates along with the eccentric wheel 2 in the track groove 21 on the lower bottom surface of the eccentric wheel 2, the ball 4 and the wear-resistant gasket 3 roll and rub in a sliding manner, the ball 4 supports the eccentric wheel 2 to keep a certain distance with the wear-resistant gasket 3, and the axial load of the air pump under the action of the inflation load is transmitted to the ball 4 through the eccentric wheel 2, then transmitted to the wear-resistant gasket 3 through the ball 4 and finally borne by the oil-containing bearing 11 of the motor 1. Because the oil-retaining bearing 11 and the casing of the motor 1 are riveted together through interference fit, the retaining force after riveting is far greater than the axial load force of the air pump during working, the axial load force of the air pump can not be transmitted to one side of the rear end cover plate of the motor 1 through the motor shaft 12, and the motor 1 only needs to provide the torque in the circumferential direction of the pump head.

The material of the ball 4 can be stainless steel, the eccentric wheel 2 contacted with the ball 4 is made of self-lubricating plastic material with low friction coefficient, and the wear-resistant gasket 3 contacted with the ball 4 can be made of wear-resistant plastic material, so that the eccentric wheel 2 and the wear-resistant gasket 3 made of plastic material and the ball 4 made of metal material move mutually, compared with the relative movement of metal and metal of a ball bearing in the motor in the prior art, the noise and temperature rise of the motor are obviously lower than those of the prior art in theory. The temperature rise is reduced, which plays an important role in prolonging the service life of the eccentric wheel 2 made of plastic materials, and meanwhile, the component cost of the motor structure is far lower than that of a motor structure using a ball bearing in the prior art.

In order to make the eccentric wheel 2 move more smoothly, the invention forms a counterweight groove 23 on the other side of the eccentric wheel 2, and a counterweight steel ball 24 is fixedly arranged in the counterweight groove 23, besides that the eccentric wheel 2 is provided with a central hole 25, a motor shaft 12 is connected in the central hole 25, an eccentric hole 22 is formed on one side of the eccentric wheel 2, the lower end of a driving shaft 71 is inserted in the eccentric hole 22, and the driving shaft 71 is used for driving a diaphragm pump air bag 81. The counterweight steel balls 24 may be fixed in the counterweight groove 23 by interference fit or by gluing, specifically, the counterweight steel balls 24 may be directly extruded into the counterweight groove 23, or a split groove 231 may be axially formed on a groove wall of the counterweight groove 23 as shown in the figure, so that the groove wall of the counterweight groove 23 has certain elasticity, and the counterweight steel balls 24 are conveniently extruded into the counterweight groove 23. Moreover, the center of the eccentric hole 22 and the center of the counterweight groove 23 are positioned on the same diameter of the eccentric wheel 2 as much as possible, and the movement is smoother. Therefore, the eccentric wheel 2 has balanced weight on two sides structurally, and when the eccentric wheel 2 is driven by the motor shaft 12 to rotate, the eccentric wheel can avoid deflection, and the noise can be further reduced through stable motion.

The above description is only exemplary of the present invention and should not be construed as limiting the scope of the present invention. It should be noted that after reading this description, those skilled in the art can make equivalent changes according to the design concept of the present application, which fall within the protection scope of the present application.