Booster pump for sprayer

Abstract

A booster pump for a sprayer comprises a motor and a pump body assembly, the pump body assembly comprises a pump shell and an end cover, the motor is fixed to the pump shell through a flange, a rotating shaft driven by the motor extends into the pump shell, an eccentric wheel and a supporting bearing are sequentially arranged on the rotating shaft, and the supporting bearing is installed in a bearing seat of the pump shell in an embedded mode; a first sealing structure is arranged between the flange and the pump shell, and a second sealing structure is arranged between the end cover and the pump shell. According to the utility model, the number of screws connected between the flange and the pump shell is increased, and the sealing structure I is combined, so that the sealing performance and the stability of the position are qualitatively improved; the second sealing structure is additionally arranged between the end cover and the pump shell, so that the position where sealing is weak is also improved, in addition, through the ingenious design of the clamping structure, one structure has multiple purposes, the sealing performance among the end cover, the pump shell and the flange is improved, meanwhile, the end cover, the pump shell and the flange are connected together, and the overall structure is firmer.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric sprayers, and particularly relates to a booster pump for a sprayer. Background Art

[0002] The booster pump used in the sprayer is usually a plunger pump. Its working principle is to rely on the reciprocating motion of the plunger to make the working volume of the pump chamber change periodically to achieve the suction and discharge of liquid. The power of the plunger comes from the motor. An eccentric wheel is provided on the motor shaft. The eccentric motion of the eccentric wheel drives the plunger to reciprocate to realize the operation of the plunger pump. In the existing plunger pump, the motor is connected to one end of the pump body through a flange, and the connection and fixation between the flange and the pump body only rely on two bolts. Since the motor needs to provide torque when driving the eccentric wheel and the plunger, the reaction force of the torque acts on the motor, which causes the connection structure between the motor and the pump body to be too thin, which easily causes the connection stability of the motor relative to the pump body to be insufficient, resulting in the torque force provided by the motor to the eccentric wheel and the plunger to be unable to be maximized. In addition, the motor shaft only relies on the connection to the rotor to obtain support force, which also makes it easy for the motor to come into contact with the pump body when working. Vibration and looseness occur between them, which in turn affects the output force; in addition, the sealing performance of the booster pump determines the performance of the entire machine. The quality of the sealing is reflected in the gaps between the flange and the pump body, and between the pump end cover and the pump body. The existing pump end cover and the pump body adopt a conventional structural design, which leads to poor sealing between the two. Once the water pump is increased, high-pressure water is easy to seep out from the connection between the two. The connection between the end cover and the pump body is opposite to the connection between the flange and the pump body. In this way, high-pressure water may enter the motor shaft and eccentric wheel, causing damage to components.

[0003] Therefore, how to solve the output of the full force of the motor torque and improve the sealing is a technical problem that needs to be solved urgently in the industry. Summary of the Invention

[0004] The utility model aims to solve the existing technical problem and provide a booster pump for a sprayer, which optimizes the previous design scheme and makes up for various defects.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] The utility model discloses a booster pump for a sprayer, comprising a motor and a pump body assembly, wherein the pump body assembly comprises a pump casing and an end cover, wherein a water inlet channel, a boosting chamber and a water outlet channel are provided in the pump casing, and a water inlet pipe which is connected with the water inlet channel and a water outlet pipe which is connected with the water outlet channel are provided on the pump casing, wherein the motor is fixed to the pump casing through a flange, a rotating shaft driven by the motor extends into the pump casing, and an eccentric wheel and a support bearing are provided on the rotating shaft in sequence, and the support bearing is embedded in the bearing seat of the pump casing, thereby supporting the outer end of the rotating shaft; a sealing structure 1 is provided between the flange and the pump casing, and the sealing structure 1 comprises a connecting end plate on the pump casing that is matched with the flange and a positioning combination arranged between the connecting end plate and the flange; a sealing structure 2 is provided between the end cover and the pump casing, and the sealing structure 2 comprises a clamping structure arranged between the end cover and the connecting end plate.

[0007] Compared with the prior art, the booster pump of the present invention has one end of the rotating shaft connected to the rotating shaft of the motor, and the other end is arranged in the bearing seat through a support bearing, so that both ends of the rotating shaft are supported. When the rotating shaft torque is output, the supporting force of the mechanical structure is obtained, thereby achieving a stable full-force output, and the boosting effect of the booster pump is better; the sealing structure 1 between the flange and the pump casing and the sealing structure 2 between the end cover and the pump casing greatly improve the sealing performance of the weak links of the booster pump, thereby improving the water leakage prevention performance of the whole machine, thereby extending its service life.

[0008] The positioning combination includes a connecting hole arranged on the connecting end plate, a plurality of positioning grooves formed by extending radially outward from the inner wall of the connecting hole, and a convex plate arranged on the flange corresponding to the connecting hole and the positioning groove, two of the plurality of positioning grooves are opposite to the clamping structure.

[0009] The positioning combination design makes the assembly between the flange and the pump casing more convenient and the connection between the two more stable. Moreover, the four corners between the flange and the connecting end plate are connected by four screws, which makes the stability between the two better and provides support for the operation of the motor.

[0010] The clamping structure includes a clamping slot arranged on the outer edge of the connecting end plate and a clamping plate arranged on the end cover. The clamping plate is embedded in the clamping slot, and through holes are provided on the clamping plate and the clamping slot. The through holes are connected to the positioning groove, and a through hole is also provided on the convex plate. The screw passes through the through hole, so that the clamping plate and the clamping slot, and the convex plate and the positioning groove are tightly connected together.

[0011] The position of the clip-on structure is different from the four corners of the flange and the connecting end plate, and also different from the two rows of connection positions between the end cover and the pump casing, which makes up for the sealing of the weaker positions between the end cover and the pump casing. Moreover, through screws, the end cover, the connecting end plate and the flange can be firmly connected together.

[0012] The motor is connected to a driven gear on the rotating shaft through a reduction gear.

[0013] The design of using the reduction gear as the transition wheel greatly improves the driving torque of the whole machine.

[0014] The motor drives the rotating shaft in a direct-connection manner. The direct-connection structure greatly simplifies the structure and reduces manufacturing costs while ensuring torque.

[0015] The beneficial effects of the utility model are:

[0016] Compared with the prior art, the booster pump for the sprayer of the utility model increases the number of screws connecting the flange and the pump casing, and combines the sealing structure 1, thereby qualitatively improving the sealing and stability of this position; a sealing structure 2 is added between the end cover and the pump casing, thereby improving the sealing of the weaker position at this position; moreover, through the ingenious design of the clip structure and the multi-purpose structure, the sealing between the end cover, the pump casing and the flange is improved, and the three are connected together, making the overall structure more solid. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional diagram of the booster pump for the sprayer of the utility model;

[0018] Figure 2 This is a three-dimensional exploded view of the booster pump for the sprayer of the utility model from one perspective;

[0019] Figure 3 This is a three-dimensional exploded view of the booster pump for the sprayer of the utility model from another perspective;

[0020] Figure 4 It is a cross-sectional schematic diagram of a booster pump for a sprayer of the utility model. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0022] See also Figures 1 to 4 The utility model provides a booster pump for a sprayer, comprising a motor 1 and a pump body assembly 2. The pump body assembly 2 comprises a pump casing 3 and an end cover 4. There are two end covers 4, which are located in upper and lower symmetrical positions on the pump casing 3. When the end covers 4 are installed, a water inlet channel, a boosting chamber and a water outlet channel are formed in the pump casing 3. A water inlet pipe 5 that is connected to the water inlet channel and a water outlet pipe 5 that is connected to the water outlet channel are provided on the pump casing.

[0023] The motor 1 is fixed to the pump casing 3 through the flange 7. At this time, the rotating shaft 19 driven by the motor 1 extends into the pump casing 3, and an eccentric wheel and a support bearing 8 are sequentially provided on the rotating shaft 19. The support bearing 8 is embedded in the bearing seat 9 of the pump casing 3, thereby supporting the outer end of the rotating shaft; when the motor 1 drives the rotating shaft to rotate, it drives the eccentric wheel to perform eccentric motion, and the eccentric motion of the eccentric wheel drives the plunger to reciprocate, thereby realizing the function of boosting.

[0024] In the process of boosting by the reciprocating motion of the plunger, high-pressure water is in the boosting chamber and the water outlet channel, which is also the position where the end cover 4 is connected to the pump casing 3. Therefore, in order to improve the sealing performance of this position, we set a sealing structure 1 between the flange and the pump casing, and a sealing structure 2 between the end cover 4 and the pump casing 3.

[0025] The sealing structure 1 includes a connecting end plate 10 on the pump casing 3 that is matched with the flange 7 and a positioning combination arranged between the connecting end plate 10 and the flange 7; the positioning combination includes a connecting hole 11 arranged on the connecting end plate 10, a plurality of positioning grooves 12 formed by extending radially outward from the inner wall of the connecting hole 11, and a convex plate 13 arranged on the flange 7 that corresponds to the connecting hole 11 and the positioning grooves 12.

[0026] The positioning assembly design facilitates assembly between the flange 7 and the pump housing 3 and provides a more stable connection. Furthermore, the four corners 14 between the flange 7 and the connecting end plate 10 are connected via four screws, providing greater stability between the two and providing support for the operation of the motor 1. Specifically, the motor 1 is secured to the flange 7. During installation, the protruding plate 13 on the flange 7 is aligned with the connecting hole 11 and the positioning slot 12 (the shape of the protruding plate is actually consistent with the shape formed by the connecting hole and the positioning slot), and is smoothly inserted. Finally, the flange 7 and the connecting end plate 10 are secured together with screws.

[0027] The second sealing structure includes a clamping structure arranged between the end cover 4 and the connecting end plate 10, and the clamping structure includes a clamping groove 15 arranged on the outer edge of the connecting end plate 10 and a clamping plate 16 arranged on the end cover 4. The clamping plate 16 is embedded in the clamping groove 15, and a through hole 17 is provided on the clamping plate 16 and the clamping groove 15. The through hole 17 passes through the positioning groove 12, and the convex plate 13 is also provided with a through hole 17 that is opposite to the through hole 17. The screw passes through the through hole 17, so that the clamping plate 16 and the clamping groove 15, the convex plate 13 and the positioning groove 12 are tightly connected together.

[0028] The position of the snap-fit ​​structure is different from the four corners 14 between the flange 7 and the connecting end plate 10, and also different from the two rows of connection positions 18 between the end cover 4 and the pump housing 3. It makes up for the sealing of the weaker position between the end cover 4 and the pump housing 3. Moreover, the end cover 4, the connecting end plate 10 and the flange 7 can all be firmly connected together through screws. Specifically, after the flange 7 is fixed in place, the convex plate 13 of the flange 7 at this time has a through hole 17 at the position facing the card slot 15. This through hole 17 is coaxial with the through hole 17 in the card slot 15. Then we install the end cover 4 in place, and the card plate 16 is embedded in the card slot 15. At this time, the three through holes 17 on the card plate 16, the card slot 15 and the convex plate 13 are on the same axis. Finally, we insert the screws into the three through holes 17.

[0029] Of course, there is also a through hole on the end cover 4 that is symmetrical to the clamping structure. The screw passes through the through hole, so that this end of the end cover 4 and the pump housing 3 can be firmly fixed together, thereby improving the sealing performance of this end.

[0030] The motor 1 drives the rotating shaft to work, which can be a direct-connected type driven by a coupling, or the rotating shaft of the motor 1 itself can serve as the rotating shaft, or the motor shaft can be connected to the driven gear of the rotating shaft through a reduction gear set.

[0031] To sum up, in the booster pump of the present invention, one end of the rotating shaft is connected to the rotating shaft of the motor 1, and the other end is arranged in the bearing seat 9 through the support bearing 8, so that both ends of the rotating shaft are supported. When the rotating shaft torque is output, the supporting force of the mechanical structure is obtained, thereby achieving a stable full-force output, and the boosting effect of the booster pump is better; the sealing structure 1 between the flange 7 and the pump casing 3 and the sealing structure 2 between the end cover 4 and the pump casing 3 greatly improve the sealing performance of the weak link of the booster pump, thereby improving the water leakage resistance of the whole machine, thereby extending its service life.

[0032] The booster pump for a sprayer provided in the embodiment of the present invention is introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the technical solutions disclosed by the present invention. At the same time, for those skilled in the art, according to the concept of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A booster pump for a sprayer, comprising a motor and a pump assembly, the pump assembly comprising a pump housing and an end cover, the pump housing being provided with a water inlet passage, a booster chamber, and a water outlet passage, and the pump housing being provided with a water inlet pipe communicating with the water inlet passage and a water outlet pipe communicating with the water outlet passage, the motor being fixed to the pump housing by a flange, characterized in that: The motor-driven rotating shaft extends into the pump casing, and an eccentric wheel and a support bearing are sequentially provided on the rotating shaft. The support bearing is embedded in the bearing seat of the pump casing, thereby supporting the outer end of the rotating shaft; a sealing structure 1 is provided between the flange and the pump casing, and the sealing structure 1 includes a connecting end plate on the pump casing that is matched with the flange and a positioning combination provided between the connecting end plate and the flange; a sealing structure 2 is provided between the end cover and the pump casing, and the sealing structure 2 includes a clamping structure provided between the end cover and the connecting end plate.

2. A booster pump for a sprayer according to claim 1, characterized in that: The positioning combination includes a connecting hole arranged on the connecting end plate, a plurality of positioning grooves formed by extending radially outward from the inner wall of the connecting hole, and a convex plate arranged on the flange corresponding to the connecting hole and the positioning groove, two of the plurality of positioning grooves are opposite to the clamping structure.

3. A booster pump for a sprayer according to claim 2, characterized in that: The clamping structure includes a clamping slot arranged on the outer edge of the connecting end plate and a clamping plate arranged on the end cover. The clamping plate is embedded in the clamping slot, and through holes are provided on the clamping plate and the clamping slot. The through holes are connected to the positioning groove, and a through hole is also provided on the convex plate. The screw passes through the through hole, so that the clamping plate and the clamping slot, and the convex plate and the positioning groove are tightly connected together.

4. A booster pump for a sprayer according to claim 1, characterized in that: The motor is connected to a driven gear on the rotating shaft through a reduction gear.

5. The booster pump for a sprayer according to claim 1, characterized in that: The motor drives the rotating shaft in a direct-connection manner.

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