CN104033357B - Vacuum air pump and window-cleaning device - Google Patents

Abstract

A vacuum air pump and a glass cleaning device. The air pump includes a driving motor (2), an air pump body (1) and a piston air pump assembly (15). The air pump body is provided with a rotating shaft (3), and the driving motor transmits power to the rotating shaft through a transmission mechanism. , a runner is fixed on the rotating shaft, and the runner is provided with a variable-diameter annular limit groove (5); at least two piston air pump assemblies are arranged around the air pump body, and the end of the piston rod of each assembly is provided with a rolling element (6), the rolling element is embedded in the annular limit groove, the rotating shaft drives the runner to rotate, and the rolling element rolls along the circumferential direction of the rotating shaft in the variable diameter annular limit groove, driving the piston rod (7) according to the variable diameter annular limit The radius of the groove changes and reciprocates. The invention can change the number of piston air pump components according to needs, increase the flow rate of the air pump, the structure is simple and compact, the reciprocating motion of the piston rod is even and stable, and multiple pairs of piston air pump components are installed at the same height, which shortens the axial volume of the vacuum air pump.

Description

Vacuum air pump and glass cleaning device

technical field

The invention relates to a vacuum air pump and a glass-wiping device, belonging to the technical field of mechanical manufacturing.

Background technique

Existing glass-cleaning robot automatically cleans the glass by being adsorbed on the glass by the suction cup at the bottom of the body. The vacuum in the suction cup is generated by the continuous pumping of the vacuum pump. The existing vacuum air pump basically drives two symmetrically installed pistons to reciprocate through a motor to complete the vacuuming action. Fig. 1 is a three-dimensional schematic diagram of the existing vacuum air pump; Fig. 2 is a cross-sectional view of the existing vacuum air pump. As shown in Fig. 1 and in conjunction with Fig. 2, the vacuum air pump includes two cylinders A and B, and each cylinder A or B includes an air inlet 100A, 100B and an air outlet 200A, 200B respectively, wherein the air inlet 100A, 100B The suction cup is connected, and the counterweight 300 is radially overlapped and installed on the motor shaft 500 through the eccentric shaft 400, wherein the inner ring of the bearing is fixed to the eccentric shaft 400, the piston rods 600A and 600B are fixed to the outer ring of the bearing, and the two piston rods 600A and 600B are opposite to each other. Therefore, when the motor 700 rotates, the two piston rods 600A and 600B will carry out relative telescopic movement under the drive of the bearing 300, so that the two cylinders A and B will perform air extraction and exhaust respectively, thereby continuously pumping the suction cup. Air to maintain the vacuum inside the suction cup.

The above-mentioned vacuum air pump only uses a pair of pistons for vacuuming, so the flow rate of the air pump is small. If the suction cup is lifted by the particles on the glass surface, the vacuum will be lost quickly, so that the body will fall from the glass surface. If the flow rate of the air pump is increased, even if the suction cup leaks, the vacuum degree can be restored immediately, thereby preventing the body from falling. The flow rate of the air pump can be increased by increasing the number of cylinders, but according to the current method, the piston rod can only be superimposed on the motor shaft, which will make the axial length of the vacuum air pump very large, the structure is redundant, and the structure is not compact, which makes the glass-wiping robot The shape volume is greatly affected.

Contents of the invention

The technical problem to be solved by the present invention is to provide a vacuum air pump and a glass-wiping device for the deficiencies of the prior art. The vacuum air pump can increase the number of piston air pump components as required, and maintain a simple and compact structure while increasing the flow rate of the air pump. The glass-wiping device using the above-mentioned vacuum air pump, due to the large flow rate of the vacuum air pump, even if the suction cup is lifted up by the particles on the glass surface, the vacuum will not be lost quickly, which effectively prevents the body of the glass-wiping device from falling from the glass surface. happened.

The technical problem to be solved in the present invention is achieved through the following technical solutions:

A vacuum air pump, comprising a driving motor, an air pump body and a piston air pump assembly arranged on the air pump body, the air pump body is provided with a rotating shaft, the driving motor transmits power to the rotating shaft through a transmission mechanism, and a runner is fixed on the rotating shaft , one side surface of the runner is provided with a variable-diameter annular limit groove; at least two of the piston air pump assemblies are arranged around the air pump body, and the end of the piston rod of each piston air pump assembly is provided with rolling elements, and the rolling elements The element is embedded in the variable-diameter annular limiting groove, and the rotating shaft drives the runner to rotate. The rolling element rolls in the variable-diameter annular limiting groove along the circumferential direction of the rotating shaft, and drives the piston rod according to the radius of the variable-diameter annular limiting groove. change and reciprocating motion.

According to requirements, the shape of the variable-diameter annular limiting groove is an eccentric groove, an irregular shape groove or an elliptical groove.

The piston air pump assemblies are arranged in pairs around the air pump body. The number of the piston air pump assemblies can be 1-3 pairs.

In order to adjust the air pump flow rate of the vacuum air pump as required while keeping its structure simple and compact, multiple pairs of the piston air pump assemblies are evenly arranged at equiangular intervals in the circumferential direction of the eccentric wheel.

In order to reduce wear, the rolling elements may be bearings or rollers.

For the convenience of arrangement, the outer shape of the air pump body is polygonal or cylindrical.

In order to stably connect the piston air pump assembly with the air pump body, the air pump body is provided with a positioning groove, and the position of the positioning groove corresponds to the installation position of the piston air pump assembly; the shape of the positioning groove is the same as that of the piston air pump The shape of the component corresponds.

The present invention also provides a glass-wiping device, which includes an adsorption unit and a walking unit. The glass-wiping device is adsorbed on the glass surface through the adsorption unit. The adsorption unit includes a suction cup and a vacuum air pump. The vacuum air pump provides vacuum suction for the suction cup. The vacuum air pump is the above-mentioned vacuum air pump.

According to needs, different transmission mechanisms can be used to transmit the power of the driving motor to the rotating shaft. For example, the transmission mechanism can include a synchronous pulley arranged on the shaft of the driving motor and a synchronous pulley arranged on the rotating shaft. They are connected by a synchronous belt; the transmission mechanism may also include a driving gear arranged on the drive motor shaft and a driven gear arranged on the rotating shaft, and the two mesh with each other.

To sum up, the present invention provides a vacuum air pump, which can increase the number of piston air pump components as required, while increasing the air pump flow rate, while maintaining a simple and compact structure. The connection method of variable-diameter annular limit grooves including eccentric grooves, irregular grooves or elliptical grooves and rolling elements not only ensures that the reciprocating motion of each piston rod is even and stable, but also ensures that multiple pairs of piston air pump components are installed on the same The height greatly shortens the axial volume of the vacuum air pump.

The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of existing vacuum air pump;

Fig. 2 is the sectional view of existing vacuum air pump;

3 is a schematic diagram of a decomposition structure of Embodiment 1 of the present invention;

Fig. 4 is a sectional view of Embodiment 1 of the present invention;

5 is a schematic diagram of an assembly structure of Embodiment 1 of the present invention;

Fig. 6 is a schematic diagram of the assembly structure of Embodiment 2 of the present invention;

Fig. 7 is a schematic structural view of the third variable-diameter annular limiting groove of the embodiment of the present invention;

Fig. 8 is a schematic structural view of the variable-diameter annular limiting groove according to Embodiment 4 of the present invention.

detailed description

Embodiment one

FIG. 3 is a schematic diagram of an exploded structure of Embodiment 1 of the present invention; FIG. 4 is a cross-sectional view of Embodiment 1 of the present invention; FIG. 5 is a schematic diagram of an assembled structure of Embodiment 1 of the present invention. As shown in Figures 3 to 5, the present invention provides a vacuum air pump, which includes a driving motor 2, an air pump body 1 and a piston air pump assembly 15 arranged on the air pump body 1, the air pump body 1 is provided with a rotating shaft 3, so The driving motor 2 transmits power to the rotating shaft 3 through the transmission mechanism, and the rotating shaft 3 is fixed with a running wheel. One side surface of the runner is provided with a variable diameter annular limiting groove 5, which can adopt various shapes. In this embodiment, the runner is an eccentric wheel 4, so it is set on The variable-diameter annular limiting groove 5 on one side surface of the rim is circular. Four piston air pump assemblies 15 are arranged around the air pump body 1, and the end of the piston rod 7 of each piston air pump assembly 15 is provided with a rolling element 6, and the rolling element 6 is embedded in the variable-diameter annular limiting groove 5 , the rotating shaft 3 drives the eccentric wheel 4 to rotate, and the rolling element 6 rolls along the circumferential direction of the rotating shaft 3 in the variable-diameter annular limiting groove 5, driving the piston rod 7 to reciprocate. In order to reduce wear, the rolling elements 6 can be bearings or rollers.

In order to adjust the air pump flow of the vacuum air pump as required while keeping its structure simple and compact, a plurality of the piston air pump assemblies 15 are evenly arranged at equiangular intervals in the circumferential direction of the eccentric wheel 4 . The piston air pump assembly 15 can be arranged in pairs around the air pump body 1, and the number of arrangement can be 1-3 pairs. That is to say, the number of piston air pump assemblies 15 arranged around the air pump body 1 can be either an odd number or an even number. Usually, when the shape of the variable-diameter annular limit groove 5 is a regular shape, in order to balance the force on the output shaft of the motor, the corresponding piston air pump assemblies 15 arranged around the air pump body 1 are arranged in pairs, that is, the number of settings It is an even number; when the shape of the variable-diameter annular limit groove 15 is irregular, the corresponding piston air pump assembly 15 arranged around the air pump body 1 can not be arranged in pairs, that is, the number of settings is an odd number, of course, in Even numbers can also be set in this case. For the convenience of arrangement, the outer shape of the air pump body 1 is polygonal or cylindrical. In the embodiment shown in FIGS. The setting quantity is 2 pairs, namely: four, just arranged on the four directions of the air pump body 1 .

As shown in Figure 3, in order to make the piston air pump assembly 15 stably connected with the air pump body 1, the air pump body 1 is provided with a positioning groove 9, and the position of the positioning groove 9 is consistent with the installation position of the piston air pump assembly 15. Correspondingly; the shape of the positioning groove 9 corresponds to the shape of the piston air pump assembly 15 . According to needs, different transmission mechanisms can be used to transmit the power of the drive motor 2 to the rotating shaft 3. For example, the transmission mechanism in this embodiment includes a synchronous wheel 10 arranged on the drive motor 2 shaft and a synchronous wheel 10 arranged on the rotating shaft 3. The synchronous pulley 11 is connected by a synchronous belt 12 between the two.

As shown in Figures 3 to 5, the working process of the vacuum air pump of the present invention is as follows: when the vacuum pump starts to work, the drive motor 2 runs, and the output shaft of the drive motor 2 passes through the synchronous pulley 10, the synchronous belt 12 and the synchronous pulley 11 Drive rotating shaft 3 to rotate. While the rotating shaft 3 is rotating, the rolling element 6 embedded in the variable-diameter annular limiting groove 5, that is, the bearing or rolling wheel rolls along the circumferential direction of the rotating shaft 3 in the variable-diameter annular limiting groove 5, driving the piston rod 7 reciprocating motion. Specifically, as the rolling element 6 rolls along the circumferential direction of the rotating shaft 3 in the variable-diameter annular limiting groove 5, in different directions of the eccentric circle of the eccentric wheel, the end of the piston rod 7 and the center of rotation of the eccentric wheel 4 The distances are also different. Under the promotion of the inner side of the outer wall of the variable-diameter annular limiting groove 5, the end of the piston rod 7 is pulled towards the direction close to the rotation center of the eccentric wheel 4, and the piston rod 7 is gradually stretched to the longest; Under the promotion of the outer side of the inner wall of the diameter ring-shaped limiting groove 5, the end of the piston rod 7 is pulled toward the direction away from the center of rotation of the eccentric wheel 4, and the piston rod 7 is gradually shrunk to the shortest. The four piston rods 7 arranged around the air pump body 1 reciprocate sequentially respectively to achieve the purpose of vacuuming. As shown in Figure 5, the four piston air pump assemblies 15 arranged around the air pump body 1 are sequentially numbered as 1, 2, 3 and 4 in the clockwise direction. The cylinders reciprocate once respectively, and the four cylinders 1, 2, 3, and 4 complete the four states of air intake, holding, holding, and air outlet in sequence, and complete the vacuuming action. During the above-mentioned movement process, the variable-diameter annular limiting groove 5 plays a dual role of driving and limiting.

Embodiment two

Fig. 6 is a schematic diagram of the assembled structure of the second embodiment of the present invention. As shown in Figure 6, the difference between this embodiment and Embodiment 1 is that the number of piston air pump assemblies 15 in this embodiment is 3 pairs, that is, the six piston air pump assemblies 15 numbered 1-6 are all Cloth is arranged around the air pump body 1 around. Due to the increase in the number of piston air pump assemblies 15, the outer shape of the air pump body 1 is cylindrical for the convenience of arrangement.

In addition, in this embodiment, the structural form of the transmission mechanism is also different from Embodiment 1, including the driving gear arranged on the shaft of the driving motor 2 and the driven gear arranged on the shaft 3, both Mesh with each other.

Other technical features in this embodiment are basically the same as those in Embodiment 1. For details, refer to the description in Embodiment 1, and details will not be repeated here.

Embodiment three

Fig. 7 is a schematic structural diagram of a third variable-diameter annular limiting groove according to Embodiment 3 of the present invention. As shown in FIG. 7 , in this embodiment, the variable-diameter annular limiting groove is an irregular-shaped groove 1000 . Multiple pairs of piston air pump assemblies 15 are arranged around the air pump body, and the ends of the piston rods 7 of each piston air pump assembly 15 are provided with rolling elements, which are embedded in irregularly shaped grooves 1000, and the rotating shaft drives the runners to rotate , the rolling element rolls in the irregular shape groove 1000 along the circumferential direction of the rotating shaft, driving the piston rod 7 to realize reciprocating motion according to the change of the radius of the irregular shape groove 1000 .

Embodiment Four

Fig. 8 is a schematic structural view of the variable-diameter annular limiting groove according to Embodiment 4 of the present invention. As shown in FIG. 8 , in this embodiment, the variable-diameter annular limiting groove is an elliptical groove 2000 . Multiple pairs of piston air pump assemblies 15 are arranged around the air pump body, and the ends of the piston rods 7 of each piston air pump assembly 15 are provided with rolling elements, which are embedded in the oval groove 2000, and the rotating shaft drives the runners to rotate and roll. The element rolls in the elliptical groove along the circumferential direction of the rotating shaft. Since the elliptical groove 2000 has a major axis and a minor axis, the piston rod 7 is driven to reciprocate according to the size change of the major axis and minor axis of the elliptical groove 2000 . In particular, when the elliptical groove 2000 is symmetrical with respect to the rotating shaft and the piston air pump assemblies 15 are symmetrically arranged on both sides of the elliptical groove 2000 in pairs, the symmetrically arranged piston rods 7 are always located at the equidiameters of the elliptical groove at the same time as the long axis Or the short axis, so that the forces on both sides of the shaft are balanced, and a better shock absorption effect is achieved.

The present invention also provides a glass-wiping device, which includes an adsorption unit and a walking unit. The glass-wiping device is adsorbed on the glass surface through the adsorption unit. The adsorption unit includes a suction cup and a vacuum air pump. The vacuum air pump provides vacuum suction for the suction cup. The vacuum air pump is the vacuum air pump in the above-mentioned multiple embodiments.

To sum up, the present invention provides a vacuum air pump, which can increase the number of piston air pump components according to needs, so as to achieve the purpose of adjusting the flow rate of the vacuum air pump; while increasing the flow rate of the air pump, in order to keep the structure simple and compact, multiple pairs of piston air pump components It is connected with the air pump body through variable-diameter annular limit grooves and rolling elements, including eccentric grooves, irregular-shaped grooves or elliptical grooves, which not only ensure that the reciprocating motion of each piston rod is even and stable, but also It ensures that multiple pairs of piston air pump components are installed at the same height, greatly reducing the axial height of the vacuum air pump, making the structure more compact and saving space. The glass-wiping device using the above-mentioned vacuum air pump, due to the large flow rate of the vacuum air pump, even if the suction cup is lifted up by the particles on the glass surface, the vacuum will not be lost quickly, which effectively prevents the body of the glass-wiping device from falling from the glass surface. happened.

Claims (11)

1. a kind of vacuum air pump, including motor（2）, air pump body（1）With the piston air pump group being arranged on air pump body Part（15）, it is characterised in that the air pump body（1）Inside it is provided with rotating shaft（3）, the motor（2）Will by drive mechanism Power passes to rotating shaft（3）, rotating shaft（3）On be fixed with runner, a side surface of runner opens up reducing annular spacing groove（5）；Extremely Few two piston air pump components（15）Enclose and be located at air pump body（1）Surrounding, each piston air pump component（15）Piston Bar（7）End is equipped with rolling element（6）, the rolling element（6）It is embedded in reducing annular spacing groove（5）In, rotating shaft（3）Band Dynamic runner is rotated, the rolling element（6）In reducing annular spacing groove（5）It is interior along rotating shaft（3）Circumferencial direction roll, drive live Stopper rod（7）Changed according to the radius size of reducing annular spacing groove and moved back and forth.

2. vacuum air pump as claimed in claim 1, it is characterised in that the reducing annular spacing groove（5）Be shaped as bias Groove, irregularly shaped groove or oval groove.

3. vacuum air pump as claimed in claim 1, it is characterised in that the piston air pump component（15）In the air pump body （1）Surrounding be arranged in pairs.

4. vacuum air pump as claimed in claim 3, it is characterised in that described piston air pump component（15）In the runner Circumferencial direction is equiangularly spaced to be uniformly arranged.

5. vacuum air pump as claimed in claim 3, it is characterised in that the piston air pump component（15）Setting quantity be 1- 3 pairs.

6. vacuum air pump as claimed in claim 5, it is characterised in that described air pump body（1）External shape be many ribs Cylindricality or cylinder.

7. vacuum air pump as claimed in claim 4, it is characterised in that described air pump body（1）It is provided with detent （9）, the detent（9）Position and the piston air pump component（15）Set location it is corresponding；The detent（9）'s Shape and piston air pump component（15）Profile it is corresponding.

8. vacuum air pump as claimed in claim 1, it is characterised in that described drive mechanism includes being arranged on motor axle On synchronizing wheel（10）Be arranged on the rotating shaft（3）On synchronous pulley（11）, between the two by Timing Belt（12）It is connected.

9. vacuum air pump as claimed in claim 1, it is characterised in that described drive mechanism includes being arranged on motor axle On driving gear and the driven gear that is arranged in the rotating shaft, both are intermeshed.

10. vacuum air pump as claimed in claim 1, it is characterised in that described rolling element（6）For bearing or roller.

A kind of 11. glass cleaning devices, comprising absorbing unit and walking unit, glass cleaning device is adsorbed in glass by absorbing unit Surface, the absorbing unit includes sucker and vacuum air pump, and vacuum air pump provides vacuum force for sucker, it is characterised in that The vacuum air pump is the vacuum air pump described in any one of claim 1-10.